CN115671910A - High-temperature flue gas purification device of cement burning clinker cooling machine and cement production system - Google Patents

Abstract

The invention discloses a high-temperature flue gas purification device of a cement burning clinker cooling machine and a cement production system, and aims to solve the technical problems that the energy and water resources are greatly consumed and the heat of high-temperature flue gas is not utilized in the existing purification process of the high-temperature flue gas of the cement burning clinker cooling machine. High temperature flue gas purification device of cement clinker firing cooler includes: the gas filtering dust remover unit is used for receiving the high-temperature flue gas output by the cooler, physically intercepting dust in the high-temperature flue gas through a high-temperature resistant filter element, and outputting the dedusted flue gas with the temperature of 250-00 ℃ and preferably 300-500 ℃; and the waste heat boiler unit is used for receiving the denitrated flue gas and the first feed water, exchanging heat and then respectively outputting water vapor and cooled flue gas.

Description

Cement burning clinker cooler high temperature flue gas purification device and cement production system

technical field

The invention relates to the field of cement production, in particular to a high-temperature flue gas purification device of a cement raw meal mill, a high-temperature flue gas purification device of a cement clinker cooler and a cement production system.

Background technique

The existing cement production system includes three parts: raw material production section, clinker production section and finished product production section. Therefore, the flue gas needs to be purified before it can be discharged. Specifically, the raw meal production section includes a raw meal mill, which is used to receive cement production raw materials and high-temperature gas from the cyclone preheater and output the first flue gas, which passes through the second The first powder recovered by a dust collector enters the homogenizer. The clinker production section includes a burnt clinker cooler, the burnt clinker cooler is used to receive the burnt clinker from the calcination equipment and cool it with air to output the second flue gas, the second flue gas The second powder recovered by the second dust collector enters the clinker storage. The finished product production section includes a powder classifier, which is used to receive the powder from the ball mill and output the third flue gas containing the sorted fine powder, and the third flue gas is recovered by the third dust collector The third powder enters the finished product warehouse.

For the purification of the first flue gas, there are two existing processes. The first process is to first pass the first flue gas into the humidification tower, and the humidification tower uses water to spray and cool the high-temperature flue gas, and outputs a humid low-temperature gas (the temperature is roughly 100°C-120°C). The low-temperature gas then enters the first dust collector (specifically, a bag filter is used) for filtration and dust removal, and the first powder after filtration and dust removal enters the homogenizer, and the dust-removed flue gas is discharged. The main disadvantages of the above-mentioned first process are: a large amount of water is required for spray cooling, and the consumption of energy and water resources is large; the heat in the first flue gas is not utilized; the nitrogen oxide content in the first flue gas is relatively high, As a result, the nitrogen oxide emission of the dust-removed flue gas is not up to the standard; the filter efficiency of the bag filter is poor, and the dust emission is easy to exceed the standard. The second process is to first pass the first flue gas into the SCR (Selective Catalytic Reduction) reactor for denitrification, and then pass it into the humidification tower, and the humid low-temperature gas output from the humidification tower enters the bag filter for filtration and dust removal. The first powder after filtering and dedusting enters the homogenizer, and the dedusted flue gas is discharged. Compared with the above-mentioned first process, the above-mentioned second process only solves the problem of denitrification, but it brings derivative problems such as easy poisoning and clogging of the SCR catalyst, which not only has low denitrification efficiency, but also affects the normal operation of purification.

For the purification of the second flue gas, the existing process is similar to the aforementioned first process, so there are still the following disadvantages: a large amount of water is required for spraying and cooling, and the consumption of energy and water resources is large; the heat in the second flue gas is not carried out. Utilization; the filter efficiency of the bag filter is poor, and the dust emission is easy to exceed the standard.

Contents of the invention

The purpose of the present invention is to provide cement raw meal mill high-temperature flue gas purification device, cement clinker cooler high-temperature flue gas purification device and cement production system to solve the problem of existing cement raw meal mill high-temperature flue gas or cement burning clinker The purification process of the high-temperature flue gas of the cooler consumes a lot of energy and water resources, and the technical problems of high-temperature flue gas heat are not utilized.

In the first aspect, a high-temperature flue gas purification device for cement raw meal mill is provided, including: a flue gas filter and dust collector unit, which is used to receive the high-temperature flue gas output from the raw meal mill and purify the high-temperature flue gas through a high-temperature-resistant filter element. The dust in the flue gas is physically intercepted and the output temperature is 250°C-400°C. The dedusted flue gas; the SCR denitration reactor unit is used to receive the dedusted flue gas added with the SCR denitrification reducing agent and pass through the SCR denitrification catalyst Outputting the denitrated flue gas; the waste heat boiler unit is used to receive the denitrated flue gas and feed water and output water vapor and cooled flue gas respectively after heat exchange; and the SCR denitrification reducing agent output pipeline unit is used to supply the The SCR denitrification reducing agent is added to the delivery channel of the high-temperature flue gas and/or the delivery channel of the dedusted flue gas.

According to an embodiment of the present invention, in the high-temperature flue gas purification device of the cement raw meal mill in the above-mentioned first aspect, the high-temperature-resistant filter element is a filter bag, and the filter bag contains a metal filter film, and the metal filter film is rolled It is a tubular structure, the upper end of the tubular structure is provided with a joint and the lower end is sealed by a bottom cover, and the joint is used to install the filter bag in the flue gas filter and dust collector unit.

According to an embodiment of the present invention, in the high-temperature flue gas purification device of the cement raw meal mill in the first aspect above, the flue gas filter and dust collector of the flue gas filter and dust collector unit includes a filter housing, and the filter housing The lower part is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading device. An orifice plate is arranged in the filter housing, and a high-temperature-resistant filter element is installed on the orifice plate. The orifice plate and the high-temperature-resistant filter element will The filter housing is divided into a lower raw gas chamber and an upper clean gas chamber, the high temperature resistant filter element is located in the lower raw gas chamber, and the SCR denitrification reducing agent output pipeline unit is arranged in the upper clean gas chamber.

According to an embodiment of the present invention, in the first aspect of the cement raw meal mill high-temperature flue gas purification device, the tube heat pipe in the waste heat boiler unit adopts finned heat exchange tubes.

According to an embodiment of the present invention, in the cement raw meal mill high-temperature flue gas purification device of the first aspect above, the SCR denitrification reactor unit is assembled on the flue gas filter and dust collector unit to form an integrated dust removal and denitrification device.

According to an embodiment of the present invention, in the cement raw meal mill high-temperature flue gas purification device of the first aspect above, the waste heat boiler unit is assembled on the integrated dust removal and denitration equipment to form an integrated dust removal, denitration and heat exchange equipment.

According to an embodiment of the present invention, in the high-temperature flue gas purification device of the cement raw meal mill in the first aspect above, the flue gas filter and dust collector of the flue gas filter and dust collector unit includes a filter housing, and the filter housing The lower part is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading device. An orifice plate is arranged in the filter housing, and a high-temperature-resistant filter element is installed on the orifice plate. The orifice plate and the high-temperature-resistant filter element will The filter housing is divided into a lower raw gas chamber and an upper clean gas chamber, and the high-temperature-resistant filter element is located in the lower raw gas chamber; the SCR denitration reactor unit includes a reactor housing, and the reactor housing is used for When the SCR denitrification catalyst is installed, the reactor housing is integrated with the filter housing, the reactor housing communicates with the upper clean gas chamber and the housing of the upper clean gas chamber Constituting or being located at the top and/or side of the upper clean air chamber.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement raw meal mill in the first aspect above, when the waste heat boiler unit is assembled on the dust removal and denitrification integrated equipment, the flue of the waste heat boiler unit is Vertically or laterally and located at the top and/or side of the reactor shell.

According to an embodiment of the present invention, in the first aspect of the cement raw meal mill high-temperature flue gas purification device, the flue gas filter and dust collector unit includes a left flue gas filter and dust collector and a right flue gas filter arranged side by side along the left and right directions. filter dust collector, the left flue gas filter dust collector and the right flue gas filter dust collector respectively have at least one flue gas filter dust collector arranged along the front and rear direction, the left flue gas filter dust collector and the right flue gas filter dust collector A total intake flue is arranged between the side smoke filter and dust collectors, and the total intake flue is respectively connected to the lower original air chamber of each of the flue gas filter and dust collectors in the flue gas filter and dust collector unit ; The length of the tube bundle in the waste heat boiler unit is set in the same direction as the left-right width of the flue gas filter and dust collector unit.

In a second aspect, a cement production system is provided, including: a raw meal production section, the raw meal production section includes a raw meal mill, and the raw meal mill is used to receive cement production raw materials and high temperature from a cyclone preheater Gas and output the first flue gas, the first powder recovered by the first dust collector enters the homogenizer; the clinker production section, the clinker production section includes a burnt clinker cooler, The burnt clinker cooling machine is used to receive the burnt clinker from the calcination equipment and output the second flue gas after cooling it with air, and the second flue gas enters the clinker through the second powder recovered by the second dust collector. Material warehouse; finished product production section, the finished product production section includes a powder classifier, the powder classifier is used to receive the powder from the ball mill and output the third flue gas containing the sorted fine powder, the third flue gas The third powder recovered by the third dust collector enters the finished product warehouse; the first dust collector adopts the cement raw meal mill high-temperature flue gas purification device of the first aspect above, wherein the first flue gas is used as the The high-temperature flue gas output from the raw meal mill enters the high-temperature flue gas purification device of the cement raw meal mill, and the dust filtered by the flue gas filter and dust collector unit of the high-temperature flue gas purification device of the cement raw meal mill enters the homogenizer as the first powder. device, the cooled flue gas is discharged.

The high-temperature flue gas purification device of the above-mentioned cement raw meal mill first filters and purifies the high-temperature flue gas output from the raw mill through the flue gas filter and dust collector unit, then adjusts the high-temperature flue gas into dust-removed flue gas, and then passes the SC R denitrification reaction The denitration unit denitrates the dust-removed flue gas to obtain the denitrated flue gas, and finally adjusts the denitrated flue gas into cooled flue gas through the waste heat boiler unit.

The output temperature of the flue gas filter and dust collector unit is 250°C-400°C for the dedusted flue gas. This temperature range does not affect the service life of the high temperature resistant filter element in the flue gas filter and dust collector unit; at the same time, it can also keep the temperature of the dedusted flue gas at At present, the more mature high-temperature SCR denitrification catalysts in technology are within the optimum temperature range to ensure the denitrification effect. In addition, dust removal before denitrification can prevent the SCR denitrification catalyst from being blocked by dust and prevent catalyst poisoning.

The heat of high-temperature flue gas can be fully recovered through the waste heat boiler unit, especially the dust content of the denitrated flue gas entering the waste heat boiler unit is small, so the heat exchange efficiency between the denitrated flue gas and the tube bundle in the waste heat boiler unit Higher, so it can improve the heat exchange efficiency of the waste heat boiler unit and reduce the influence of dust on the waste heat boiler unit.

In the third aspect, a high-temperature flue gas purification device of a cement burning clinker cooler is provided, including: an air filter and dust collector unit, which is used to receive the high-temperature flue gas output by the cooler and pass through a high-temperature resistant filter element to purify the high-temperature flue gas. The dust in the high-temperature flue gas is physically intercepted and the output temperature is 250°C-00°C, preferably 300°C-500°C, the dedusted flue gas; and the waste heat boiler unit is used to receive the denitrated flue gas and the first feed water and After heat exchange, water vapor and cooled flue gas are respectively output.

According to the embodiment of the present invention, the high-temperature flue gas purification device of the cement clinker cooler in the third aspect above further includes a feed water preheating unit for receiving the high-temperature dust and the first dust discharged from the flue gas filter and dust collector unit The second feed water is heated by the high-temperature dust to output the first feed water formed by heating the second feed water.

According to an embodiment of the present invention, in the high-temperature flue gas purification device of the cement clinker cooler of the above-mentioned third aspect, the high-temperature-resistant filter element is a filter bag, the filter bag contains a metal filter membrane, and the metal filter element is a filter bag. The membrane is rolled into a tubular structure, the upper end of the tubular structure is provided with a joint and the lower end is sealed by a bottom cover, and the joint is used to install the filter bag in the flue gas filter and dust collector unit.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement clinker cooler in the third aspect above, the flue gas filter and dust collector of the flue gas filter and dust collector unit includes a filter housing, and the filter The lower part of the housing is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading device. An orifice plate is provided in the filter housing, and a high temperature resistant filter element is installed on the orifice plate. The orifice plate and the high temperature resistant The filter element separates the filter housing into a lower raw air chamber and an upper clean air chamber, and the high temperature resistant filter element is located in the lower raw air chamber.

According to the embodiment of the present invention, the high-temperature flue gas purification device of the cement clinker cooler of the third aspect above further includes a pre-heat waste heat boiler unit for receiving the high-temperature flue gas output by the cooler and the third feed water After heat exchange, water vapor and the cooled high-temperature flue gas are respectively output; the flue gas filter and dust collector unit is used to receive the high-temperature flue gas output by the pre-heat waste heat boiler unit and pass through the high-temperature resistant filter element to filter the high-temperature flue gas. After the dust in the high-temperature flue gas is physically intercepted, the output temperature is 250°C-500°C and the dust-removed flue gas is output.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement burning clinker cooler in the above third aspect, the shell constituting the flue of the waste heat boiler unit and the flue constituting the front waste heat boiler unit The shells are assembled with each other so that the waste heat boiler unit and the front waste heat boiler unit become an integrated heat exchange equipment, and the air supply flue and return flue are distributed around the integrated heat exchange equipment; the flue gas filter The dust collector unit is arranged on the side of the integrated heat exchange equipment, and the integrated heat exchange equipment filters the exhaust port of the flue of the pre-heat waste heat boiler unit and the flue gas through the air supply flue The air inlet of the dust collector unit is connected, and the integrated heat exchange device connects the air inlet of the flue of the waste heat boiler unit with the exhaust port of the flue gas filter and dust collector unit through the return flue.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement burning clinker cooler in the above third aspect, the flue of the front waste heat boiler unit is vertically arranged, and the inlet of the front waste heat boiler unit The air port and exhaust port are distributed in the lower and upper parts of the flue of the pre-heat waste heat boiler unit, and the lower part of the flue of the pre-heat waste heat boiler unit is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading mechanism The flue of the waste heat boiler unit is vertically arranged, and the air inlet and exhaust port of the waste heat boiler unit are distributed on the upper and lower parts of the flue of the waste heat boiler unit; The exhaust port of the flue is docked with the air inlet of the flue of the waste heat boiler unit so that the front waste heat boiler unit and the waste heat boiler unit form an inverted U-shaped structure.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement burning clinker cooler in the above third aspect, the heat exchange in the pre-heat waste heat boiler unit and at least the waste heat boiler unit in the waste heat boiler unit The tubes adopt finned heat exchange tubes, and when the heat exchange tubes in the pre-heat waste heat boiler unit do not use finned heat exchange tubes, smooth surface heat exchange tubes are used.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement clinker cooler in the third aspect above, the pre-heat waste heat boiler unit includes a set of heat exchangers arranged in sequence from front to back along the flue of the front waste heat boiler unit. The first superheater, the first evaporator and the first economizer; the waste heat boiler unit includes a second evaporator and a second economizer arranged in sequence along the flue of the waste heat boiler unit; The steam outlet of the steam drum corresponding to the second evaporator is connected to the steam inlet of the first superheater through a steam delivery pipeline.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement clinker cooler in the third aspect above, the waste heat boiler unit is assembled on the flue gas filter and dust collector unit to form an integrated dust removal and heat exchange equipment.

According to the embodiment of the present invention, in the high-temperature flue gas purification device of the cement clinker cooler in the third aspect above, the flue gas filter and dust collector of the flue gas filter and dust collector unit includes a filter housing, and the filter The lower part of the housing is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading device. An orifice plate is provided in the filter housing, and a high temperature resistant filter element is installed on the orifice plate. The orifice plate and the high temperature resistant The filter element separates the filter housing into a lower raw gas chamber and an upper clean gas chamber, and the high temperature resistant filter element is located in the lower raw gas chamber; the flue of the waste heat boiler unit is arranged vertically or horizontally and is located in the Filter housing top and/or sides.

According to an embodiment of the present invention, in the high-temperature flue gas purification device of the cement clinker cooler in the third aspect above, the flue gas filter and dust collector unit includes a left flue gas filter and dust collector and a right flue gas filter and dust collector arranged side by side along the left and right directions. Side flue gas filter dust collector, the left flue gas filter dust collector and the right side flue gas filter dust collector respectively have at least one flue gas filter dust collector arranged along the front and rear direction, the left flue gas filter dust collector There is a main intake flue between the filter and the right flue gas filter and dust collector, and the main intake flue is respectively connected with the lower raw gas of each of the flue gas filter and dust collectors in the flue gas filter and dust collector unit. The room is connected; the length of the tube bundle in the waste heat boiler unit is set in the same direction as the left-right width of the flue gas filter and dust collector unit.

In a fourth aspect, a cement production system is provided, including: a raw meal production section, the raw meal production section includes a raw meal mill, and the raw meal mill is used to receive cement production raw materials and high temperature from a cyclone preheater Gas and output the first flue gas, the first powder recovered by the first dust collector enters the homogenizer; the clinker production section, the clinker production section includes a burnt clinker cooler, The burnt clinker cooling machine is used to receive the burnt clinker from the calcination equipment and output the second flue gas after cooling it with air, and the second flue gas enters the clinker through the second powder recovered by the second dust collector. Material warehouse; finished product production section, the finished product production section includes a powder classifier, the powder classifier is used to receive the powder from the ball mill and output the third flue gas containing the sorted fine powder, the third flue gas The third powder recovered by the third dust collector enters the finished product warehouse; the second dust collector adopts the high-temperature flue gas purification device of the cement burning clinker cooler in the third aspect above, wherein the second flue gas The gas enters the high-temperature flue gas purification device of the cement burning clinker cooler as the high-temperature flue gas output by the cooler, and the dust filtered by the flue gas filter and dust collector unit of the high-temperature flue gas purification device of the cement burning clinker cooler As the second powder enters the clinker storehouse, the cooled flue gas is discharged.

According to an embodiment of the present invention, in the cement production system of the fourth aspect above, the first dust collector adopts a cement raw meal mill high-temperature flue gas purification device, and the cement raw meal mill high-temperature flue gas purification device includes: The flue gas filter and dust collector unit is used to receive the high-temperature flue gas output from the raw meal mill and physically intercept the dust in the high-temperature flue gas through a high-temperature resistant filter element, and then output the dust-removed flue gas at a temperature of 250°C-400°C The SCR denitration reactor unit is used to receive the dedusted flue gas added with the SCR denitration reducing agent and output the denitrated flue gas after passing through the SCR denitration catalyst; the waste heat boiler unit is used to receive the denitrated flue gas and feed water and output water vapor and cooled flue gas respectively after heat exchange; and SCR denitrification reducing agent output pipeline unit, used to add The SCR denitration reducing agent; wherein, the first flue gas enters the high-temperature flue gas purification device of the cement raw meal mill as the high-temperature flue gas output from the raw meal mill, and the high-temperature flue gas purification device of the cement raw meal mill The dust filtered by the flue gas filter and dust collector unit enters the homogenizer as the first powder, and the cooled flue gas is discharged.

According to an embodiment of the present invention, in the cement production system of the fourth aspect above, in the cement raw meal mill high-temperature flue gas purification device, the SCR denitrification reactor unit is assembled on the flue gas filter and dust collector unit to form a dust collector Denitrification integrated equipment, and the waste heat boiler unit is assembled on the dust removal and denitration integrated equipment to form dust removal, denitration and heat exchange integrated equipment.

The above-mentioned high-temperature flue gas purification device of the cement burning clinker cooler first filters and purifies the high-temperature flue gas output by the cement burning clinker cooler through the flue gas filter and dust collector unit, and then adjusts the high-temperature flue gas into dedusted flue gas , and then adjust the dedusted flue gas into cooled flue gas through the waste heat boiler unit.

The output temperature of the flue gas filter and dust collector unit is 250°C-500°C for the dedusted flue gas. This temperature range does not affect the service life of the high temperature resistant filter element in the flue gas filter and dust collector unit. The heat of high-temperature flue gas can be fully recovered through the waste heat boiler unit, especially the dust content of the denitrated flue gas entering the waste heat boiler unit is small, so the heat exchange efficiency between the denitrated flue gas and the tube bundle in the waste heat boiler unit Higher, so it can improve the heat exchange efficiency of the waste heat boiler unit and reduce the influence of dust on the waste heat boiler unit.

The present application will be further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice.

Description of drawings

The drawings constituting a part of this specification are used to assist the understanding of the application, and the content provided in the drawings and related descriptions in this specification can be used to explain the application, but do not constitute an undue limitation to the application.

Fig. 1 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a high-temperature flue gas purification device of a cement clinker cooler in an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention.

Fig. 4 is a left view of the cement raw meal mill high-temperature flue gas purification device shown in Fig. 3 .

Fig. 5 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a partial structure of a high-temperature flue gas purification device of a cement clinker cooler in an embodiment of the present invention.

The direction indicated by the hollow arrow in Fig. 3-7 represents the flow direction of the flue gas.

Detailed ways

The application is clearly and completely described below in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present application based on these descriptions. Before the present application is described in conjunction with the accompanying drawings, it should be pointed out that:

The technical solutions and technical features provided in each part including the following descriptions can be combined with each other under the condition of no conflict. In addition, where possible, these technical solutions, technical features and related combinations can be assigned specific technical subjects and protected by relevant patents.

The embodiments of the present application involved in the following descriptions are generally only some embodiments rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without making creative work , should fall within the scope of patent protection.

Regarding the terms and units in this specification: the terms "comprising", "comprising", "having" and any variations thereof in this specification and the corresponding claims and related parts are intended to cover non-exclusive inclusion. In addition, other related terms and units can be reasonably interpreted based on the relevant content provided in this manual. The terms "front", "rear", "left", and "right" in this specification, corresponding claims and related parts represent relative positional relationships based on the drawings. In addition, other related terms and units can be reasonably interpreted based on the relevant content provided in this manual.

As shown in Figure 1-2, the existing cement production system includes a raw meal production section and a clinker production section, wherein the raw meal production section includes a raw meal mill 12, and the raw meal mill 12 is used to receive cement production raw materials And the high-temperature gas from the cyclone preheater 21 and output the first flue gas, and the first powder recovered by the first dust collector enters the homogenizer 16 through the first flue gas. The clinker production section includes a fired clinker cooler 29 (usually a grate cooler), and the fired clinker cooler 29 is used to receive the fired clinker from the calcination equipment 22 (usually a rotary kiln) and use After the air is cooled, the second flue gas is output, and the second flue gas enters the clinker storage through the second powder recovered by the second dust collector.

For the purification of the first flue gas, there are two existing processes. The first process is to first pass the first flue gas into the humidification tower, and the humidification tower uses water to spray and cool the high-temperature flue gas, and outputs a humid low-temperature gas (the temperature is roughly 100°C-120°C). The low-temperature gas then enters the first dust collector (specifically, a bag filter is used) for filtration and dust removal, and the first powder after filtration and dust removal enters the homogenizer, and the dust-removed flue gas is discharged. The main disadvantages of the above-mentioned first process are: a large amount of water is required for spray cooling, and the consumption of energy and water resources is large; the heat in the first flue gas is not utilized; the nitrogen oxide content in the first flue gas is relatively high, As a result, the nitrogen oxide emission of the dust-removed flue gas is not up to the standard; the filter efficiency of the bag filter is poor, and the dust emission is easy to exceed the standard. The second process is to first pass the first flue gas into the SCR (Selective Catalytic Reduction) reactor for denitrification, and then pass it into the humidification tower, and the humid low-temperature gas output from the humidification tower enters the bag filter for filtration and dust removal. The first powder after filtering and dedusting enters the homogenizer, and the dedusted flue gas is discharged. Compared with the above-mentioned first process, the above-mentioned second process only solves the problem of denitrification, but it brings derivative problems such as easy poisoning and clogging of the SCR catalyst, which not only has low denitrification efficiency, but also affects the normal operation of purification.

For the purification of the second flue gas, the existing process is similar to the aforementioned first process, so there are still the following disadvantages: a large amount of water is required for spraying and cooling, and the consumption of energy and water resources is large; the heat in the second flue gas is not carried out. Utilization; the filter efficiency of the bag filter is poor, and the dust emission is easy to exceed the standard.

Fig. 1 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention. As shown in Fig. 1, the high-temperature flue gas purification device of cement raw meal mill includes: flue gas filter dust collector unit 12, SCR denitration reactor unit 13, waste heat boiler unit 14 and SCR denitrification reducing agent output pipeline unit.

Wherein, the flue gas filter and dust collector unit 12 is used to receive the high-temperature flue gas (first flue gas) output by the raw meal mill 11 and physically intercept the dust in the high-temperature flue gas through a high-temperature resistant filter element, and then the output temperature is 250°C-400°C Dust-removed flue gas. The dust after filtering and dedusting enters the homogenizer 16 .

The SCR denitration reactor unit 13 is used to receive the dedusted flue gas added with SCR denitration reducing agent (such as liquid ammonia, urea, ammonia water, etc.), and output the denitrated flue gas after passing through the SCR denitration catalyst. The SCR denitrification reactor unit 13 can be assembled on the flue gas filter dust collector unit 12 to form an integrated device for dust removal and denitrification.

The waste heat boiler unit 14 is used to receive the denitrated flue gas and feed water and output water vapor and cooled flue gas after heat exchange. The cooled flue gas is discharged through the chimney 20 after passing through the fan 19 . The steam can be fed into a steam turbine to generate electricity. The tube heat tubes in the waste heat boiler unit 14 are preferably finned heat exchange tubes.

The SCR denitrification reducing agent output pipeline unit is used to add the SCR denitrification reducing agent to the delivery channel of the high-temperature flue gas and/or the delivery channel of the dedusted flue gas.

The above-mentioned high-temperature flue gas purification device for cement raw meal mill first filters and purifies the high-temperature flue gas output from the raw meal mill through the flue gas filter and dust collector unit 12, then adjusts the high-temperature flue gas into dust-removed flue gas, and then passes the SCR denitrification reaction The device unit 13 denitrates the dust-removed flue gas to obtain the denitrated flue gas, and finally the waste heat boiler unit 14 adjusts the denitrated flue gas into cooled flue gas.

The output temperature of the flue gas filter and dust collector unit 12 is 250°C-400°C for the dust-removed flue gas. This temperature range does not affect the service life of the high-temperature resistant filter element in the flue gas filter and dust collector unit 12; Keep within the optimal operating temperature range of more mature high-temperature SCR denitration catalysts (such as SCR denitration catalysts with TiO ₂ as the carrier and V ₂ O ₅ and WO ₃ as active components) in order to ensure the denitration effect. In addition, dust removal before denitrification can prevent the SCR denitrification catalyst from being blocked by dust and prevent catalyst poisoning.

The heat of the high-temperature flue gas can be fully recovered through the waste heat boiler unit 14, especially the denitrated flue gas that enters the waste heat boiler unit 14 has a small dust content, so the distance between the denitrated flue gas and the tube bundle in the waste heat boiler unit 14 The heat exchange efficiency is high, so the heat exchange efficiency of the waste heat boiler unit can be improved, and the influence of dust on the waste heat boiler unit 14 can be reduced.

Fig. 3 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention. Fig. 4 is a left view of the cement raw meal mill high-temperature flue gas purification device shown in Fig. 3 . As shown in Figure 3-4, a cement raw meal mill high temperature flue gas purification device includes: a flue gas filter and dust collector unit 12 for receiving the high temperature flue gas (first flue gas) output by the raw meal mill 11 And the dust in the high-temperature flue gas is physically intercepted through the high-temperature resistant filter element, and the output temperature is 250 ° C-400 ° C. The dedusted flue gas; The dedusted flue gas passes through the SCR denitrification catalyst 132 and outputs the denitrated flue gas; the waste heat boiler unit 17 is used to receive the denitrated flue gas and feed water and output water vapor and cooled flue gas respectively after heat exchange; The SCR denitrification reactor unit 13 and the waste heat boiler unit 17 are respectively assembled on the flue gas filter and dust collector unit 12 to form an integrated equipment for dust removal, denitrification and heat exchange.

The waste heat boiler unit 17 has the same function as the second waste heat boiler unit 14 . Compared with the aforementioned integrated equipment for dust removal and denitrification, the above integrated equipment for dust removal, denitrification and heat exchange can further reduce the heat loss in the process from flue gas denitrification to flue gas heat exchange, and improve the efficiency of waste heat utilization.

The flue gas filter and dust collector of the flue gas filter and dust collector unit 12 includes a filter housing 122, the bottom of the filter housing 122 is provided with an ash hopper 123, and the bottom of the ash hopper 123 is connected with an ash unloading device. The filter housing 122 is provided with an orifice plate, and a filter element 121 is installed on the orifice plate, and the orifice plate and the filter element 121 divide the filter housing 122 into a lower raw gas chamber 124 and an upper clean air chamber 125 , the filter element 121 is located in the lower raw gas chamber 124 .

The filter element 121 is preferably a filter bag, the filter bag includes a metal filter membrane, the metal filter membrane is rolled into a tubular structure, the upper end of the tubular structure is provided with a joint and the lower end is sealed by a bottom cover, the joint It is used to install the filter bag in the flue gas filter and dust collector unit 12 . Compared with the traditional high-temperature-resistant ceramic filter element, the above-mentioned filter bag has a lower cost and has better high-temperature resistance. In addition, the metal filter membrane can be rolled into a tubular structure, indicating that the metal filter membrane is relatively thin, which helps to ensure the filtration flux. The metal filter membrane has high filtration efficiency and long practical life, and can achieve dust emission standards.

The SCR denitration reactor unit 13 includes a reactor housing 131, which is used to install the SCR denitration catalyst 132 in the reactor housing 131, and the reactor housing 131 is connected with the filter housing 122 as In one piece, the reactor shell 131 communicates with the upper clean gas chamber 125 and is formed by the shell of the upper clean gas chamber 125 or located on the top of the upper clean gas chamber.

The flue 171 of the waste heat boiler unit 17 is arranged vertically and is located on the top of the reactor shell 131 and communicates with the reactor shell 131 .

The smoke filter and dust collector unit 12 also includes a left smoke filter and dust collector 12A and a right smoke filter and dust collector 12B arranged side by side along the left and right direction, the left smoke filter and dust collector 12A and the right smoke filter and dust collector 12A The smoke filter and dust collector 12B respectively has at least one smoke filter and dust collector arranged along the front and rear directions. A total air intake flue 126 is arranged between the left flue gas filter dust collector and the right flue gas filter dust collector. The lower raw gas chamber 124 of the flue gas filter and dust collector is connected. In addition, a total exhaust flue 127 may be arranged between the left flue gas filter dust collector 12A and the right flue gas filter dust collector 12B, and the exhaust gas flue 127 may be located in the intake gas flue 126 , the main exhaust flue 127 is in communication with the upper clean air chamber 125 of each of the flue gas filter dust collectors in the flue gas filter dust collector unit 12 . When the flue gas filter and dust collector unit 12 includes a plurality of flue gas filter and dust collectors, the structure of the flue gas filter and dust collector unit 12 can be made more reasonable by arranging the plurality of flue gas filter and dust collectors in the above arrangement.

Since the main intake flue 126 and the main exhaust flue 127 are located between the left side flue gas filter dust collector 12A and the right side flue gas filter dust collector 12B, the left and right width of the flue gas filter dust collector unit 12 increase, at this time, the length of the tube bundles in the waste heat boiler unit 17 (tube bundles of heat exchange equipment such as evaporators, economizers, etc.) can be set in the same direction as the left-right width of the flue gas filter and dust collector unit 12 , so as to ensure a large heat transfer area.

The top of the exhaust main flue 127 has an exhaust passage 128, and the reactor housing 131 is arranged on the top of the exhaust passage 128 and passes through the exhaust passage 128 and the exhaust main flue 127. connected. In this way, the dust-removed flue gas entering the total exhaust flue 127 can enter the reactor shell 131 from the exhaust passage 128 .

The reactor housing 131 is arranged directly above the overall exhaust gas flue 127 and the left-right width of the reactor housing 131 is smaller than the left-right width of the flue gas filter and dust collector unit 12 . In this way, an operating space can be formed on both sides of the reactor shell 131 at the top of the flue gas filter and dust remover unit 12 , so as to install and replace the SCR denitration catalyst 132 .

The top of the reactor shell 131 is also provided with a guide flue 133, and the flue 171 of the waste heat boiler unit 17 is vertically arranged on the top of the guide flue 133 and passes through the guide flue 133 Conducted with the reactor shell 131. The left-right width of the flue 171 of the waste heat boiler unit 17 is consistent with the left-right width of the flue gas filter and dust collector unit 12, and the left-right width of the guide flue 133 is also the same as that of the flue gas filter and dust collector unit 12. The left and right widths of the device unit 12 are consistent. In this way, the guide flue 133 can fully buffer the denitrated flue gas that is about to enter the flue 171 of the waste heat boiler unit 17 , so that the flow field in the flue 171 of the waste heat boiler unit 17 is more uniform.

Fig. 5 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention. As shown in Figure 5, the difference between the device of this embodiment and the device shown in Figures 3-4 is that: the flue 171 of the waste heat boiler unit 17 is arranged at the side of the reactor shell 131, and at the same time, The flue 171 of the waste heat boiler unit 17 is vertically arranged on the side of the guide flue 133 . As a result, the overall height of the dust removal, denitrification and heat exchange integrated equipment can be reduced.

Fig. 6 is a schematic structural diagram of a cement raw meal mill high-temperature flue gas purification device according to an embodiment of the present invention. As shown in Fig. 6, the difference between the device of this embodiment and the device shown in Figs. The front-to-back length of the reactor shell 131 is smaller than the front-to-back length of the flue gas filter and dust collector unit 12, and the flue 171 of the waste heat boiler unit 17 is arranged laterally on the top of the flue gas filter and dust collector unit 12 and the Between the sides of the SCR denitration reactor unit 13. Therefore, it is helpful to ensure that the overall height and front-to-back length of the integrated equipment for dust removal, denitrification and heat exchange will not be too large.

Fig. 2 is a schematic diagram of a high-temperature flue gas purification device of a cement clinker cooler in an embodiment of the present invention. As shown in FIG. 2 , the high-temperature flue gas purification device of the cement burning clinker cooler includes: a flue gas filter and dust collector unit 23 and a waste heat boiler unit 24 .

The flue gas filter and dust collector unit is used to receive the high-temperature flue gas (second flue gas) output by the cooler 29 and physically intercept the dust in the high-temperature flue gas through a high-temperature resistant filter element, after which the output temperature is 250°C -500°C, preferably 300°C-500°C (such as 350°C, 400°C) dedusted flue gas.

The waste heat boiler unit 24 is used to receive the denitrated flue gas and the first feed water and output water vapor and cooled flue gas respectively after heat exchange. The cooled flue gas is discharged through the chimney 28 after passing through the fan 27 .

The above-mentioned high-temperature flue gas purification device of the cement-burning clinker cooler first filters and purifies the high-temperature flue gas output by the cement-burning clinker cooler 29 through the flue gas filter and dust collector unit 23, and then adjusts the high-temperature flue gas to be dedusted. The flue gas is adjusted to be cooled flue gas through the waste heat boiler unit 24 .

The output temperature of the flue gas filter and dust collector unit 23 is 250°C-500°C for the dedusted flue gas, and this temperature range does not affect the service life of the high temperature resistant filter element in the flue gas filter and dust collector unit.

Optionally, in the high-temperature flue gas purification device of the cement clinker cooler, the high-temperature-resistant filter element is a filter bag, the filter bag contains a metal filter membrane, and the metal filter membrane is rolled into a tubular structure, The upper end of the tubular structure is provided with a joint and the lower end is sealed by a bottom cover, and the joint is used for installing the filter bag in the flue gas filter and dust collector unit 23 . The metal filter membrane has high filtration efficiency and long practical life, and can achieve dust emission standards.

The heat of the high-temperature flue gas can be fully recovered through the waste heat boiler unit 24, especially the denitrated flue gas that enters the waste heat boiler unit 24 has a small dust content, so the distance between the denitrated flue gas and the tube bundle in the waste heat boiler unit 24 The heat exchange efficiency is high, so the heat exchange efficiency of the waste heat boiler unit 24 can be improved, and the impact of dust on the waste heat boiler unit 24 can be reduced.

Optionally, the high-temperature flue gas purification device of the cement burning clinker cooler also includes a feedwater preheating unit 25, which is used to receive the high-temperature dust and the second feedwater discharged by the flue gas filter and dust collector unit 23 and pass through the high-temperature dust The second feedwater is heated to output the first feedwater formed by heating the second feedwater. The dust after heat exchange enters the clinker storehouse 26 . The heat-exchanged first feed water enters the waste heat boiler unit 24 . Thus, the high-temperature dust discharged from the flue gas filter and dust collector unit 23 can be used to preheat the first feed water.

The water preheating unit 25 can adopt a structure similar to a partition wall heat exchanger, in which there are transport channels for high-temperature dust and water transport flux, and the heat transfer between these two channels is carried out through the heat transfer wall, so as to realize dust removal by flue gas filtration The high-temperature dust discharged from the device unit 23 has the function of preheating the first feed water.

The burnt clinker cooler 29 is usually a grate cooler. By adjusting the operating parameters of the grate cooler, the temperature of the flue gas output by the grate cooler can be greatly changed. For example, the temperature of the flue gas output by the grate cooler can be higher, such as 600°C. At this time, the high-temperature flue gas purification device of the cement clinker cooler can also include a front waste heat boiler unit for receiving the cooler 29 output the high-temperature flue gas and the third feed water and output water vapor and the cooled high-temperature flue gas after heat exchange; the flue gas filter and dust collector unit 23 is used to receive the output The high-temperature flue gas and the dust in the high-temperature flue gas are physically intercepted by the high-temperature resistant filter element, and the output temperature is 250°C-500°C. Dust-removed flue gas. In this way, the residual heat of the high-temperature flue gas output by the cooling machine 29 can be more fully utilized.

Fig. 7 is a schematic diagram of a partial structure of a high-temperature flue gas purification device of a cement clinker cooler in an embodiment of the present invention. As shown in FIG. 7 , the casing constituting the flue of the waste heat boiler unit 24 and the casing constituting the flue of the front waste heat boiler unit are assembled together so that the waste heat boiler unit and the front waste heat boiler The unit becomes an integrated heat exchange equipment, and the air supply flue and return flue are distributed around the integrated heat exchange equipment; the flue gas filter and dust collector unit 23 is arranged on the side of the integrated heat exchange equipment, so The integrated heat exchange equipment connects the exhaust port of the flue of the pre-heat waste heat boiler unit with the air inlet of the flue gas filter and dust collector unit through the gas supply flue, and the integrated heat exchange equipment passes through The return flue connects the air inlet of the flue of the waste heat boiler unit 24 with the exhaust port of the flue gas filter and dust collector unit 12 .

Specifically, the flue of the front waste heat boiler unit is arranged vertically, and the air inlet and exhaust port of the front waste heat boiler unit are distributed in the lower and upper parts of the flue of the front waste heat boiler unit , the lower part of the flue of the pre-heat waste heat boiler unit is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading mechanism; the flue of the waste heat boiler unit 24 is vertically arranged, and the inlet of the waste heat boiler unit The air port and the exhaust port are distributed on the upper and lower parts of the flue of the waste heat boiler unit; The front waste heat boiler unit and the waste heat boiler unit form an inverted U-shaped structure (as shown in FIG. 7 ). The integrated heat exchange equipment has a compact structure, can save the overall floor area, and is convenient for ash discharge at the same time.

In addition, among the pre-heat waste heat boiler unit and at least the heat exchange tube in the waste heat boiler unit adopts fin heat exchange tubes, when the heat exchange tube in the front waste heat boiler unit does not use fin When the sheet heat exchange tube is used, the smooth heat exchange tube is used.

In addition, the pre-heat waste heat boiler unit includes a first superheater 111, a first evaporator 112, and a first economizer 113 arranged sequentially along the flue of the front waste heat boiler unit; 24 includes a second evaporator 141 and a second economizer 142 arranged sequentially along the flue of the waste heat boiler unit from front to back; the steam outlet of the steam drum correspondingly connected to the second evaporator 142 is connected to the The steam inlet of the first superheater 111.

In the above-mentioned high-temperature flue gas purification device of cement raw meal mill, the waste heat boiler unit 24 is assembled on the flue gas filter and dust collector unit 23 to form an integrated equipment for dust removal and heat exchange.

Referring to Fig. 3-6, the flue gas filter and dust remover of the flue gas filter and dust remover unit 23 includes a filter housing, the lower part of the filter housing is provided with an ash hopper, and the bottom of the ash hopper is connected with a discharge Ash device, the filter housing is provided with an orifice plate, the orifice plate is equipped with a high temperature resistant filter element, the orifice plate and the high temperature resistant filter element divide the filter housing into a lower raw gas chamber and an upper clean room. The air chamber, the high temperature resistant filter element is located in the lower raw air chamber; the flue of the waste heat boiler unit 26 is arranged vertically or horizontally and located on the top and/or side of the filter housing.

In addition, the flue gas filter and dust collector unit 23 includes a left flue gas filter dust collector and a right flue gas filter dust collector arranged side by side along the left and right direction, the left flue gas filter dust collector and the right flue gas filter dust collector The filter and dust collectors respectively have at least one flue gas filter and dust collector arranged along the front and rear directions, and a main air intake flue is arranged between the left flue gas filter and dust collector and the right flue gas filter and dust collector, and the air intake The total flue is respectively communicated with the lower raw gas chambers of each of the flue gas filter dust collectors in the flue gas filter dust collector unit; the length of the tube bundle in the waste heat boiler unit 24 is connected The left-right width of the dust collector unit 23 is set in the same direction.

The cement production system of the embodiment of the present invention comprises:

Raw meal production section, the raw meal production section includes a raw meal mill, the raw meal mill is used to receive cement production raw materials and high-temperature gas from the cyclone preheater and output the first flue gas, and the first flue gas passes through The first powder recovered by the first dust collector enters the homogenizer;

The clinker production section, the clinker production section includes a burnt clinker cooler, and the burnt clinker cooler is used to receive the burnt clinker from the calcination equipment and output the second flue gas after cooling it with air. The second powder recovered by the second flue gas through the second dust collector enters the clinker warehouse;

The finished product production section, the finished product production section includes a powder classifier, the powder classifier is used to receive the powder from the ball mill and output the third flue gas containing the sorted fine powder, and the third flue gas passes through the third The third powder recovered by the dust collector enters the finished product warehouse.

Wherein, the second dust collector adopts the above-mentioned high-temperature flue gas purification device of the cement-burning clinker cooler, wherein the second flue gas enters the cement-burning clinker cooler as the high-temperature flue gas output by the cooler The high-temperature flue gas purification device, the dust filtered by the flue gas filter and dust collector unit of the high-temperature flue gas purification device of the cement burning clinker cooler enters the clinker warehouse as the second powder, and the cooled flue gas is discharged;

And/or, the first dust collector adopts the above-mentioned cement raw meal mill high-temperature flue gas purification device, wherein the first flue gas enters the cement raw meal mill high-temperature flue gas as the high-temperature flue gas output from the raw meal mill Purification device, the dust filtered by the flue gas filter and dust collector unit of the high-temperature flue gas purification device of the cement raw meal mill enters the homogenizer as the first powder, and the cooled flue gas is discharged.

The content related to this application has been described above. Those skilled in the art will be able to implement the present application based on these descriptions. Based on the above content of this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of patent protection.

Claims (10)

1. The high-temperature flue gas purification device of the cement burning clinker cooler, characterized in that it includes: The flue gas filter and dust collector unit is used to receive the high-temperature flue gas output by the cooler and physically intercept the dust in the high-temperature flue gas through a high-temperature resistant filter element, after which the output temperature is 250°C-500°C, preferably 300°C -500℃ dedusted flue gas; and The waste heat boiler unit is used to receive the denitrated flue gas and the first feed water and output water vapor and cooled flue gas respectively after heat exchange. 2. The high-temperature flue gas purification device of cement burning clinker cooler as claimed in claim 1, characterized in that: it also includes a water supply preheating unit for receiving the high-temperature dust and the first Second feed water and heat the second feed water through the high-temperature dust to output the first feed water formed by heating the second feed water; and/or, The high temperature resistant filter element is a filter bag, the filter bag contains a metal filter membrane, the metal filter membrane is rolled into a tubular structure, the upper end of the tubular structure is provided with a joint and the lower end is sealed by a bottom cover, the joint for installing the filter bag in the flue gas filter dust collector unit; and/or, The flue gas filter and dust collector of the flue gas filter and dust collector unit includes a filter housing, the bottom of the filter housing is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading device, and the filter housing There is an orifice plate in the middle, and a high temperature resistant filter element is installed on the orifice plate. The orifice plate and the high temperature resistant filter element divide the filter housing into a lower raw gas chamber and an upper clean air chamber. The high temperature resistant filter element is located in In the lower original gas chamber. 3. The high-temperature flue gas purification device of the cement burning clinker cooler as claimed in claim 1, characterized in that: it also includes a pre-heat waste heat boiler unit for receiving the high-temperature flue gas and the third water supply output by the cooler and output water vapor and the cooled high-temperature flue gas respectively after heat exchange; The flue gas filter and dust collector unit is used to receive the high-temperature flue gas output by the pre-heat waste heat boiler unit and physically intercept the dust in the high-temperature flue gas through a high-temperature resistant filter element, after which the output temperature is 250°C-500°C Dust and smoke have been removed. 4. The high-temperature flue gas purification device of cement burning clinker cooler as claimed in claim 3, characterized in that: the shell constituting the flue of the waste heat boiler unit and the flue constituting the front waste heat boiler unit The shells are assembled with each other so that the waste heat boiler unit and the front waste heat boiler unit form an integrated heat exchange equipment, and the air supply flue and return flue are distributed around the integrated heat exchange equipment; The flue gas filter and dust collector unit is arranged on the side of the integrated heat exchange equipment, and the integrated heat exchange equipment connects the exhaust port of the flue of the pre-heat waste heat boiler unit to the The air inlet of the flue gas filter and dust collector unit is connected, and the integrated heat exchange device connects the air inlet of the flue of the waste heat boiler unit to the air inlet of the flue gas filter and dust collector unit through the return flue. Exhaust connection. 5. The high-temperature flue gas purification device of cement burning clinker cooler as claimed in claim 4, characterized in that: the flue of the front waste heat boiler unit is vertically arranged, and the inlet of the front waste heat boiler unit The air port and exhaust port are distributed in the lower and upper parts of the flue of the pre-heat waste heat boiler unit, and the lower part of the flue of the pre-heat waste heat boiler unit is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading mechanism ; The flue of the waste heat boiler unit is arranged vertically, and the air inlet and exhaust port of the waste heat boiler unit are distributed on the upper and lower parts of the flue of the waste heat boiler unit; The exhaust port of the flue of the front waste heat boiler unit is connected with the air inlet of the flue of the waste heat boiler unit so that the front waste heat boiler unit and the waste heat boiler unit form an inverted U-shaped structure. 6. The high-temperature flue gas purification device of cement burning clinker cooler as claimed in claim 3, characterized in that: the heat exchange in at least the waste heat boiler unit among the pre-heat waste heat boiler unit and the waste heat boiler unit The tubes adopt finned heat exchange tubes, and when the heat exchange tubes in the pre-heat waste heat boiler unit do not use finned heat exchange tubes, smooth surface heat exchange tubes are used; and/or, The pre-heat waste heat boiler unit includes a first superheater, a first evaporator and a first economizer arranged in sequence along the flue of the front waste heat boiler unit; The flue of the unit consists of a second evaporator and a second economizer arranged in sequence from front to back; the steam outlet of the steam drum correspondingly connected to the second evaporator is connected to the steam inlet of the first superheater through a steam delivery pipeline. 7. The cement raw meal mill high-temperature flue gas purification device according to claim 1, characterized in that: the waste heat boiler unit is assembled on the flue gas filter and dust collector unit to form an integrated dust removal and heat exchange device; The flue gas filter and dust collector of the flue gas filter and dust collector unit includes a filter housing, the bottom of the filter housing is provided with an ash hopper, and the bottom of the ash hopper is connected with an ash unloading device, and the filter housing There is an orifice plate in the middle, and a high temperature resistant filter element is installed on the orifice plate. The orifice plate and the high temperature resistant filter element divide the filter housing into a lower raw gas chamber and an upper clean air chamber. The high temperature resistant filter element is located in In the lower original gas chamber; The flue of the waste heat boiler unit is arranged vertically or horizontally and is located on the top and/or side of the filter housing. 8. The cement raw meal mill high-temperature flue gas purification device according to claim 7, wherein the flue gas filter and dust collector unit includes a left flue gas filter and dust collector and a right flue gas filter arranged side by side along the left and right directions. filter dust collector, the left flue gas filter dust collector and the right flue gas filter dust collector respectively have at least one flue gas filter dust collector arranged along the front and rear direction, the left flue gas filter dust collector and the right flue gas filter dust collector A total intake flue is arranged between the side smoke filter and dust collectors, and the total intake flue is respectively connected to the lower original air chamber of each of the flue gas filter and dust collectors in the flue gas filter and dust collector unit ; The length of the tube bundle in the waste heat boiler unit is set in the same direction as the left-right width of the flue gas filter and dust collector unit. 9. Cement production system, including: Raw meal production section, the raw meal production section includes a raw meal mill, the raw meal mill is used to receive cement production raw materials and high-temperature gas from the cyclone preheater and output the first flue gas, and the first flue gas passes through The first powder recovered by the first dust collector enters the homogenizer; The clinker production section, the clinker production section includes a burnt clinker cooler, and the burnt clinker cooler is used to receive the burnt clinker from the calcination equipment and output the second flue gas after cooling it with air. The second powder recovered by the second flue gas through the second dust collector enters the clinker warehouse; The finished product production section, the finished product production section includes a powder classifier, the powder classifier is used to receive the powder from the ball mill and output the third flue gas containing the sorted fine powder, and the third flue gas passes through the third The third powder recovered by the dust collector enters the finished product warehouse; It is characterized in that: the second dust collector adopts the high-temperature flue gas purification device of the cement clinker cooler according to any one of claims 1-8, wherein the second flue gas is used as the The high-temperature flue gas output by the cooler enters the high-temperature flue gas purification device of the cement-burning clinker cooler, and the dust filtered by the flue gas filter and dust collector unit of the high-temperature flue gas purification device of the cement-burning clinker cooler is used as the second The powder enters the clinker storehouse, and the cooled flue gas is discharged. 10. The cement production system according to claim 9, wherein the first dust collector adopts a cement raw meal mill high-temperature flue gas purification device, and the cement raw meal mill high-temperature flue gas purification device comprises: The flue gas filter and dust collector unit is used to receive the high-temperature flue gas output from the raw meal mill and physically intercept the dust in the high-temperature flue gas through a high-temperature resistant filter element, and then output the dust-removed flue gas at a temperature of 250°C-400°C ; The SCR denitration reactor unit is used to receive the dedusted flue gas added with the SCR denitration reducing agent and output the denitrated flue gas after passing through the SCR denitration catalyst; The waste heat boiler unit is used to receive the denitrated flue gas and feed water and output water vapor and cooled flue gas respectively after heat exchange; and SCR denitration reducing agent output pipeline unit, used to add the SCR denitration reducing agent to the delivery channel of the high-temperature flue gas and/or the delivery channel of the dedusted flue gas; Wherein, the first flue gas enters the high-temperature flue gas purification device of the cement raw meal mill as high-temperature flue gas output from the raw meal mill, and is filtered by the flue gas filter and dust collector unit of the high-temperature flue gas purification device of the cement raw meal mill The dust enters the homogenizer as the first powder, and the cooled flue gas is discharged.

Images