CN117265196A - Blast furnace gas temperature regulating device and blast furnace gas dust removal system - Google Patents
Blast furnace gas temperature regulating device and blast furnace gas dust removal system Download PDFInfo
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- CN117265196A CN117265196A CN202311162599.4A CN202311162599A CN117265196A CN 117265196 A CN117265196 A CN 117265196A CN 202311162599 A CN202311162599 A CN 202311162599A CN 117265196 A CN117265196 A CN 117265196A
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- furnace gas
- air
- heat exchange
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- 239000000428 dust Substances 0.000 title claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 27
- 239000000779 smoke Substances 0.000 claims abstract description 226
- 239000007789 gas Substances 0.000 claims description 130
- 230000005540 biological transmission Effects 0.000 claims description 26
- 230000001276 controlling effect Effects 0.000 claims description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000004744 fabric Substances 0.000 description 8
- 230000033228 biological regulation Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a blast furnace gas temperature regulating device and a blast furnace gas dust removal system, wherein the temperature regulating device comprises: a thermostat and a smoke/gas switching system, the thermostat comprising: the bottom of the heat exchange cavity is provided with a blast furnace gas inlet, and the top of the heat exchange cavity is provided with a blast furnace gas outlet; the heat exchange tubes are arranged in the heat exchange cavity at intervals and are respectively communicated with a blast furnace gas inlet and a blast furnace gas outlet of the heat exchange cavity in an airtight manner; the first smoke/wind annular pipeline is arranged at the bottom of the heat exchange cavity in a surrounding mode, is provided with smoke/wind channel inlets and a plurality of smoke/wind channel outlets which are uniformly distributed along the circumference of the smoke/wind channel inlets, and the smoke/wind channel outlets are respectively communicated with the heat exchange cavity in an airtight mode; the second smoke/wind annular pipeline is arranged at the top of the heat exchange cavity in a surrounding mode, is provided with smoke/wind channel outlets and a plurality of smoke/wind channel inlets which are uniformly distributed along the circumference of the smoke/wind channel outlets, and the smoke/wind channel inlets are respectively communicated with the heat exchange cavity in an airtight mode; the blast furnace gas temperature regulating device has the characteristics of high efficiency and energy conservation.
Description
Technical Field
The invention relates to the technical field of blast furnace smelting, in particular to a blast furnace gas temperature regulating device and a blast furnace gas dust removal system.
Background
In the production process of iron and steel enterprises, blast furnace smelting is an important link, and a large amount of byproduct blast furnace gas is generated when the blast furnace smelts iron (the yield is about 1750-2000m 3 Per ton of iron), blast furnace gas is a combustible gas, and can be used as fuel in various processes in iron and steel enterprises. Because the blast furnace gas from the top of the blast furnace contains a large amount of dust and has high pressure, the blast furnace gas cannot be directly used by users, and the blast furnace gas is required to be dedusted (BDC bag-type dust removing system) and depressurized (TRT generator set) and then sent to the users for use. In the blast furnace gas dust removal system, the existing dust removal process basically adopts a dry cloth bag dust removal process, and the temperature of the blast furnace gas needs to be controlled within a certain range (about 80-220 degrees) because the dust removal cloth bag has a range requirement on the working temperature.
When the temperature of the blast furnace gas exceeds 220 ℃, the dust removing cloth bag is subjected to high-temperature burning loss, so that production and rear user use are affected; when the temperature of the blast furnace gas is lower than 80 ℃, moisture in the blast furnace gas can be condensed to form condensed water on the inner wall of the dust removal cloth bag, dust in the blast furnace gas is mixed to form a hardening block which is adhered on the cloth bag to form a dressing bag, so that the air permeability of the cloth bag is affected, and the cloth bag is cracked. Therefore, when the temperature of the blast furnace gas exceeds the required range, the blast furnace gas needs to be subjected to temperature regulation control, and most of iron and steel enterprises are provided with cooling devices at present, but when the temperature of the blast furnace gas is too low, the temperature of the blast furnace gas is not increased, so that the bag of the dust collection cloth bag is broken, or steam heating is adopted, and the additional consumption of energy is required by the steam heating, so that the economical efficiency is low.
Disclosure of Invention
In order to achieve efficient and energy-saving temperature regulation of blast furnace gas, in a first aspect of the present invention, a blast furnace gas temperature regulation apparatus is provided, comprising: the temperature regulator is used for introducing blast furnace gas and regulating the temperature of the blast furnace gas; the smoke/gas switching system is used for selectively introducing high-temperature smoke or air into the temperature regulator according to the temperature of the blast furnace gas; wherein, the attemperator includes: the bottom of the heat exchange cavity is provided with a blast furnace gas inlet, and the top of the heat exchange cavity is provided with a blast furnace gas outlet; the heat exchange tubes are arranged in the heat exchange cavity at intervals and are respectively communicated with a blast furnace gas inlet and a blast furnace gas outlet of the heat exchange cavity in an airtight manner; the first smoke/wind annular pipeline is arranged at the bottom of the heat exchange cavity in a surrounding mode, and is provided with smoke/wind channel inlets and a plurality of smoke/wind channel outlets which are uniformly distributed along the circumference of the smoke/wind channel inlets, wherein the smoke/wind channel outlets are respectively communicated with the heat exchange cavity in an airtight mode so as to disperse the directions of smoke/wind entering the heat exchange cavity; the second smoke/wind annular pipeline is arranged at the top of the heat exchange cavity in a surrounding mode, and is provided with smoke/wind channel outlets and a plurality of smoke/wind channel inlets which are uniformly distributed along the circumference of the smoke/wind channel outlets, wherein the smoke/wind channel inlets are respectively communicated with the heat exchange cavity in an airtight mode so as to disperse the direction of smoke/wind discharged out of the heat exchange cavity; wherein the first smoke/wind annular pipeline and the second smoke/wind annular pipeline are respectively and hermetically isolated from the plurality of heat exchange tubes.
In one or more embodiments, the plurality of heat exchange tubes are disposed within the heat exchange cavity but are not in contact with an inner wall of the heat exchange cavity for allowing smoke/wind to enter the heat exchange cavity from the first smoke/wind annular duct and flow upwardly out of the heat exchange cavity from the second smoke/wind annular duct via gaps between the plurality of heat exchange tubes.
In one or more embodiments, the smoke/gas switching system includes: the first smoke/wind transmission pipeline is provided with a smoke suction port and a smoke inlet at one end, and is hermetically communicated with a smoke/wind channel inlet of the first smoke/wind annular pipeline, and the other end is respectively provided with the smoke suction port and the smoke inlet, wherein the smoke inlet is used for being hermetically communicated with a smoke pipeline between the blast furnace hot blast stove and the hot blast stove chimney; the air inlet valve is arranged near the air suction inlet and is used for controlling the communication or isolation between the air suction inlet and the atmosphere; the smoke inlet valve is arranged near the smoke inlet and is used for controlling the communication between the first smoke/wind transmission pipeline and the smoke pipeline, wherein the smoke inlet is arranged near the blast furnace hot blast stove; the first smoke exhaust valve is arranged in the smoke pipeline close to the hot blast stove chimney and is used for controlling the smoke of the blast furnace hot blast stove to directly enter the hot blast stove chimney.
In one or more embodiments, the smoke/gas switching system further comprises: the air inlet of the exhaust fan is hermetically communicated with the smoke/air duct outlet of the second smoke/air annular pipeline; the second smoke/wind transmission pipeline is provided with an air outlet and an air outlet at one end, and is hermetically communicated with the air outlet of the exhaust fan, and the other end is respectively provided with an air outlet and an air outlet, wherein the air outlet is used for being hermetically communicated with the flue gas pipeline of the hot blast stove chimney; the exhaust valve is arranged near the exhaust outlet and used for controlling the communication or isolation between the exhaust outlet and the atmosphere; the second smoke exhaust valve is arranged in the smoke pipeline close to the hot blast stove chimney.
In one or more embodiments, the smoke/gas switching system further comprises: the temperature sensor is arranged in the blast furnace gas outlet of the heat exchange cavity and is used for detecting the temperature of the blast furnace gas at the blast furnace gas outlet; and the controller is respectively connected with the exhaust fan, the temperature sensor, the air inlet valve, the smoke exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve and is used for controlling the opening/closing of the air inlet valve, the smoke exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve according to the temperature value acquired by the temperature sensor and a preset threshold value.
In one or more embodiments, the controller controls the opening/closing of the air inlet valve, the smoke inlet valve, the air exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve according to the temperature value acquired by the sensor and a preset threshold value, and the controller comprises: when the temperature of the blast furnace gas at the blast furnace gas outlet is smaller than a first preset threshold value, the first smoke exhaust valve, the air inlet valve and the air exhaust valve are closed, the smoke inlet valve and the second smoke exhaust valve are opened, and the exhaust fan is started, so that high-temperature smoke of the blast furnace hot blast stove sequentially passes through the first smoke exhaust valve, the first smoke/air transmission pipeline and the first smoke/air annular pipeline to enter the heat exchange cavity, heat exchange is carried out between the high-temperature smoke and the blast furnace gas in the plurality of heat exchange tubes, the low-temperature blast furnace gas is heated, and then the cooled smoke sequentially passes through the second smoke/air annular pipeline, the exhaust fan, the second smoke/air transmission pipeline and the air exhaust valve to be sent into the hot blast stove chimney for emission.
In one or more embodiments, the controller controls the opening/closing of the air inlet valve, the smoke inlet valve, the air exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve according to the temperature value acquired by the sensor and a preset threshold value, and the controller further comprises: when the temperature of the blast furnace gas at the blast furnace gas outlet is higher than a second preset threshold value, opening the first smoke exhaust valve, the air inlet valve and the air exhaust valve, closing the smoke inlet valve and the second smoke exhaust valve, starting the exhaust fan, enabling the external air to sequentially enter the heat exchange cavity through the air inlet valve, the first smoke/air transmission pipeline and the first smoke/air annular pipeline, exchanging heat with the blast furnace gas in the plurality of heat exchange tubes, cooling the blast furnace gas at a high temperature, and then sequentially discharging the air after temperature rise through the second smoke/air annular pipeline, the exhaust fan, the second smoke/air transmission pipeline, the air exhaust valve and the air exhaust port; wherein the second pre-threshold is greater than the first pre-threshold.
In one or more embodiments, the heat exchange chamber outer wall is provided with a thermally insulating material.
In a second aspect of the present invention, a blast furnace gas dust removal system is presented, comprising: a blast furnace gas temperature regulating device according to any one of the above embodiments; and a gravity dust remover, a BDC bag-type dust remover, a TRT generator set, a blast furnace hot blast stove and a hot blast stove chimney; the gravity dust remover is communicated with a blast furnace, and is sequentially communicated with the blast furnace gas temperature regulating device, the BDC bag dust remover, the TRT generator set, the blast furnace hot blast stove and the hot blast stove chimney, wherein the TRT generator set is also communicated with a blast furnace gas main pipe network.
The beneficial effects of the invention include: the temperature regulator designed by the invention comprises a heat exchange cavity, and a first smoke/wind annular pipeline and a second smoke/wind annular pipeline which encircle the heat exchange cavity, so that high-temperature smoke or air can enter the heat exchange cavity from multiple directions and blow to a heat exchange tube array, thereby realizing the temperature rise and temperature regulation of blast furnace gas in the heat exchange tube array, saving energy and protecting environment; and then, the gas (high-temperature flue gas or air) takes gaps between the heat exchange tubes and the inner wall of the heat exchange cavity and gaps between the heat exchange tubes as gas flow channels, and the heat exchange tubes which are uniformly arranged ensure that the gas quantity for exchanging heat with each heat exchange tube is approximately the same, so that the uniform occurrence of heat exchange is ensured, and the heat exchange efficiency of the device can be effectively improved because the blast furnace gas is dispersed into a plurality of heat exchange tubes for heating.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other embodiments may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a blast furnace gas temperature regulating device according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a first smoke/wind annular duct embodying the present invention;
FIG. 3 is a schematic cross-sectional view of a second smoke/wind annular duct embodying the present invention;
FIG. 4 is a schematic diagram showing the operation state of a blast furnace gas temperature regulating device according to an embodiment of the present invention when the temperature is raised;
FIG. 5 is a schematic diagram showing the operation state of a blast furnace gas temperature regulating device for temperature reduction regulation according to the embodiment of the present invention;
fig. 6 is a schematic diagram of a blast furnace gas dust removal system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.
Referring to fig. 1, a structure of a blast furnace gas temperature regulating apparatus according to an embodiment of the present invention is shown, including: a thermostat (part inside the dotted line frame of fig. 1) for introducing blast furnace gas and performing temperature regulation thereof; the smoke/gas switching system is used for selectively introducing high-temperature smoke or air into the temperature regulator according to the temperature of the blast furnace gas; wherein, the attemperator includes: the heat exchange cavity 100, the bottom of the heat exchange cavity 100 is provided with a blast furnace gas inlet 101, and the top is provided with a blast furnace gas outlet 102; the plurality of heat exchange tubes 200 are arranged in the heat exchange cavity 100 at intervals, and are respectively communicated with the blast furnace gas inlet 101 and the blast furnace gas outlet 102 of the heat exchange cavity 100 in an airtight manner; the first smoke/wind annular duct 300 is arranged at the bottom of the heat exchange cavity 100 in a surrounding manner, and is provided with a smoke/wind channel inlet 301 and a plurality of smoke/wind channel outlets 302 which are uniformly distributed along the circumference, wherein the smoke/wind channel outlets 302 are respectively communicated with the heat exchange cavity 100 in an airtight manner so as to disperse the directions of smoke/wind entering the heat exchange cavity; a second smoke/wind ring-shaped pipe 400, wherein the second smoke/wind ring-shaped pipe 400 is arranged around the top of the heat exchange cavity 100 and is provided with smoke/wind channel outlets 401 and a plurality of smoke/wind channel inlets 402 which are uniformly distributed along the circumference, and the smoke/wind channel inlets 402 are respectively communicated with the heat exchange cavity gas 100 in a close way so as to disperse the direction of smoke/wind discharged out of the heat exchange cavity 100; wherein the first smoke/wind annular duct 300 and the second smoke/wind annular duct 400 are isolated from the plurality of heat exchange tube nest gases 200, respectively.
Referring to fig. 2 and 3, there are shown a cross-sectional view of a first smoke/wind annular duct embodying the present invention and a cross-sectional view of a second smoke/wind annular duct embodying the present invention, respectively. As shown in fig. 2 and 3, the thermostat of the present embodiment enables high-temperature flue gas or air to enter the heat exchange chamber from multiple directions and to be discharged from multiple directions of the heat exchange chamber by providing the first smoke/wind annular duct 300 and the second smoke/wind annular duct 400 surrounding the heat exchange chamber, so that uniformity of heat exchange to the multiple heat exchange tubes can be effectively ensured; and, the mode of air intake from the bottom of the heat exchange cavity and air exhaust from the top is adopted to ensure the heat exchange effect.
In a further embodiment, the plurality of heat exchange tubes are distributed inside the heat exchange cavity but are not in contact with the inner wall of the heat exchange cavity for allowing smoke/wind to enter the heat exchange cavity from the first smoke/wind annular duct and to flow upwards from the second smoke/wind annular duct out of the heat exchange cavity via gaps between the plurality of heat exchange tubes.
In particular, in order to further ensure the heat exchange effect, the embodiment proposes to distribute the heat exchange tubes inside the heat exchange cavity as much as possible, but not in contact with the inner wall of the heat exchange cavity, so that gas (high-temperature flue gas or air) is forced to take gaps between the heat exchange tubes and the inner wall of the heat exchange cavity and gaps between the heat exchange tubes as gas flow channels, and the heat exchange tubes which are uniformly arranged ensure that the gas quantity for exchanging heat with each heat exchange tube is approximately the same, so that the uniform occurrence of heat exchange is ensured, and the heat exchange efficiency of the device can be effectively improved because the blast furnace gas is dispersed into a plurality of heat exchange tubes for heating.
The blast furnace gas temperature regulating device of the invention comprises a temperature regulator part in the embodiment, and also comprises a smoke/gas switching system part, wherein the smoke/gas switching system mainly comprises a smoke/gas transmission pipeline and a valve, and is used for controlling high-temperature smoke or air to be introduced into the temperature regulator and discharged out of the smoke/gas so as to realize heat exchange regulation. The smoke/gas switching system of the invention comprises the following components:
the first smoke/wind transmission pipeline 500, one end of the first smoke/wind transmission pipeline 500 is in airtight communication with a smoke/wind channel inlet of the first smoke/wind annular pipeline, and the other end of the first smoke/wind transmission pipeline is respectively provided with a smoke suction port 501 and a smoke inlet 502, wherein the smoke inlet 502 is used for being in airtight communication with a smoke pipeline between the blast furnace hot blast stove and a hot blast stove chimney; an air inlet valve 600, disposed near the air inlet 501, for controlling the communication or isolation between the air inlet and the atmosphere; the smoke inlet valve 700 is arranged near the smoke inlet 502 and is used for controlling the communication between the first smoke/wind transmission pipeline and the smoke pipeline, wherein the smoke inlet 502 is arranged near the blast furnace hot blast stove; the first smoke exhaust valve 800 is arranged in a smoke pipeline close to the chimney of the hot blast stove and is used for controlling the smoke of the hot blast stove to directly enter the chimney of the hot blast stove; the exhaust fan 900, the air inlet of the exhaust fan 900 is in airtight communication with the smoke/air channel outlet 401 of the second smoke/air annular pipeline; the second smoke/wind transmission pipeline 1000, one end of the second smoke/wind transmission pipeline 1000 is in airtight communication with the air outlet of the exhaust fan 900, and the other end of the second smoke/wind transmission pipeline is respectively provided with an air outlet 1001 and an air outlet 1002, wherein the air outlet 1002 is used for being in airtight communication with the flue gas pipeline of the hot blast stove chimney; an exhaust valve 1100, disposed near the exhaust port 1001, for controlling the communication or isolation between the exhaust port 1001 and the atmosphere; the second smoke exhaust valve 1200 is arranged in a smoke pipeline close to a chimney of the hot blast stove; the temperature sensor 1300 is arranged in the blast furnace gas outlet 102 of the heat exchange cavity and is used for detecting the temperature of the blast furnace gas at the blast furnace gas outlet; and a controller (not shown) connected to the blower 900, the temperature sensor 1300, the air inlet valve 600, the air inlet valve 700, the air exhaust valve 1100, the first air exhaust valve 800 and the second air exhaust valve 1200, respectively, for controlling the opening/closing of the air inlet valve 600, the air inlet valve 700, the air exhaust valve 1100, the first air exhaust valve 800 and the second air exhaust valve 1200 according to the temperature value collected by the temperature sensor and a preset threshold value.
Specifically, in the smoke/gas switching system of this embodiment, the controller controls the opening/closing of each valve and the operation of the exhaust fan, and the control process includes:
referring to fig. 4, when the temperature of the blast furnace gas at the blast furnace gas outlet of the heat exchange cavity 100 is less than a first preset threshold, the first smoke exhaust valve 800, the air intake valve 600 and the air exhaust valve 1100 are closed, the smoke intake valve 700 and the second smoke exhaust valve 1200 are opened, and the exhaust fan 900 is started, so that the high-temperature flue gas of the blast furnace hot blast stove sequentially passes through the first smoke exhaust valve 800, the first flue/air transmission pipeline 500 and the first flue/air annular pipeline 300 to enter the heat exchange cavity 100, and exchanges heat with the blast furnace gas in the plurality of heat exchange tubes 200, heats the blast furnace gas with low temperature, and then sequentially passes through the second flue/air annular pipeline 400, the exhaust fan 900, the second flue/air transmission pipeline 1000 and the smoke exhaust valve 1200 to be discharged;
referring to fig. 5, when the temperature of the blast furnace gas at the blast furnace gas outlet is greater than a second preset threshold, the first smoke exhaust valve 800, the air intake valve 600 and the air exhaust valve 1100 are opened, the smoke intake valve 700 and the second smoke exhaust valve 1200 are closed, and the exhaust fan 900 is started, so that external air sequentially passes through the air intake valve 600, the first smoke/air transmission pipeline 500 and the first smoke/air annular pipeline 300 to enter the heat exchange cavity 100, exchanges heat with the blast furnace gas in the plurality of heat exchange tubes 200, cools the blast furnace gas at a high temperature, and then sequentially discharges the warmed air through the second smoke/air annular pipeline 400, the exhaust fan 900, the second smoke/air transmission pipeline 1000, the air exhaust valve 1100 and the air exhaust ports; wherein the second predetermined threshold is greater than the first predetermined threshold.
In an alternative embodiment, to avoid damage of a single temperature sensor, a plurality of temperature sensors may be disposed in the blast furnace gas outlet of the heat exchange chamber and connected to the controller, respectively, so that normal execution of temperature adjustment can be ensured as long as one temperature sensor can normally operate. In another alternative embodiment, the majority of the comparison results are used to control the up/down regulation when comparing the temperature values acquired by the plurality of temperature sensors with the threshold value.
In a further embodiment, the outer wall of the heat exchange chamber 100 of the present invention is further provided with a heat insulating material for heat preservation and burn-proof, such as asbestos, etc., for burn-proof and energy saving.
Referring to fig. 6, in a second aspect of the present invention, a blast furnace gas dust removal system is provided, comprising: the blast furnace gas temperature regulating device as in any one of the above embodiments; and a gravity dust remover, a BDC bag-type dust remover, a TRT generator set, a blast furnace hot blast stove and a hot blast stove chimney; the gravity dust remover is communicated with the blast furnace, and is sequentially communicated with a blast furnace gas temperature adjusting device, a BDC bag-type dust remover, a TRT generator set, a blast furnace hot blast stove and a hot blast stove chimney, wherein the TRT generator set is also communicated with a blast furnace gas main pipe network.
Specifically, through setting up blast furnace gas temperature regulating device in above-mentioned dust pelletizing system, can guarantee BDC sack cleaner's operational environment effectively, avoid it to damage because of blast furnace gas temperature is too high or too low, can prolong its life greatly.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The foregoing embodiment of the present invention has been disclosed with reference to the number of embodiments for the purpose of description only, and does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that: the above discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the disclosure of embodiments of the invention, including the claims, is limited to such examples; combinations of features of the above embodiments or in different embodiments are also possible within the idea of an embodiment of the invention, and many other variations of the different aspects of the embodiments of the invention as described above exist, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the embodiments should be included in the protection scope of the embodiments of the present invention.
Claims (9)
1. A blast furnace gas temperature regulating apparatus, comprising:
the temperature regulator is used for introducing blast furnace gas and regulating the temperature of the blast furnace gas;
the smoke/gas switching system is used for selectively introducing high-temperature smoke or air into the temperature regulator according to the temperature of the blast furnace gas; wherein, the attemperator includes:
the bottom of the heat exchange cavity is provided with a blast furnace gas inlet, and the top of the heat exchange cavity is provided with a blast furnace gas outlet;
the heat exchange tubes are arranged in the heat exchange cavity at intervals and are respectively communicated with a blast furnace gas inlet and a blast furnace gas outlet of the heat exchange cavity in an airtight manner;
the first smoke/wind annular pipeline is arranged at the bottom of the heat exchange cavity in a surrounding mode, and is provided with smoke/wind channel inlets and a plurality of smoke/wind channel outlets which are uniformly distributed along the circumference of the smoke/wind channel inlets, wherein the smoke/wind channel outlets are respectively communicated with the heat exchange cavity in an airtight mode so as to disperse the directions of smoke/wind entering the heat exchange cavity;
the second smoke/wind annular pipeline is arranged at the top of the heat exchange cavity in a surrounding mode, and is provided with smoke/wind channel outlets and a plurality of smoke/wind channel inlets which are uniformly distributed along the circumference of the smoke/wind channel outlets, wherein the smoke/wind channel inlets are respectively communicated with the heat exchange cavity in an airtight mode so as to disperse the direction of smoke/wind discharged out of the heat exchange cavity;
wherein the first smoke/wind annular pipeline and the second smoke/wind annular pipeline are respectively and hermetically isolated from the plurality of heat exchange tubes.
2. A blast furnace gas temperature regulating device according to claim 1, wherein said plurality of heat exchanging pipes are arranged inside said heat exchanging cavity but not in contact with the inner wall of said heat exchanging cavity for allowing smoke/wind to enter said heat exchanging cavity from said first smoke/wind annular duct and to flow upwards from said second smoke/wind annular duct out of said heat exchanging cavity via gaps between said plurality of heat exchanging pipes.
3. A blast furnace gas temperature regulating device according to claim 1, wherein said flue gas/gas switching system comprises:
the first smoke/wind transmission pipeline is provided with a smoke suction port and a smoke inlet at one end, and is hermetically communicated with a smoke/wind channel inlet of the first smoke/wind annular pipeline, and the other end is respectively provided with the smoke suction port and the smoke inlet, wherein the smoke inlet is used for being hermetically communicated with a smoke pipeline between the blast furnace hot blast stove and the hot blast stove chimney;
the air inlet valve is arranged near the air suction inlet and is used for controlling the communication or isolation between the air suction inlet and the atmosphere;
the smoke inlet valve is arranged near the smoke inlet and is used for controlling the communication between the first smoke/wind transmission pipeline and the smoke pipeline, wherein the smoke inlet is arranged near the blast furnace hot blast stove;
the first smoke exhaust valve is arranged in the smoke pipeline close to the hot blast stove chimney and is used for controlling the smoke of the blast furnace hot blast stove to directly enter the hot blast stove chimney.
4. A blast furnace gas temperature regulating device according to claim 3, wherein said flue gas/gas switching system further comprises:
the air inlet of the exhaust fan is hermetically communicated with the smoke/air duct outlet of the second smoke/air annular pipeline;
the second smoke/wind transmission pipeline is provided with an air outlet and an air outlet at one end, and is hermetically communicated with the air outlet of the exhaust fan, and the other end is respectively provided with an air outlet and an air outlet, wherein the air outlet is used for being hermetically communicated with the flue gas pipeline of the hot blast stove chimney;
the exhaust valve is arranged near the exhaust outlet and used for controlling the communication or isolation between the exhaust outlet and the atmosphere;
the second smoke exhaust valve is arranged in the smoke pipeline close to the hot blast stove chimney.
5. The blast furnace gas temperature regulating apparatus according to claim 4, wherein said flue gas/gas switching system further comprises:
the temperature sensor is arranged in the blast furnace gas outlet of the heat exchange cavity and is used for detecting the temperature of the blast furnace gas at the blast furnace gas outlet;
and the controller is respectively connected with the exhaust fan, the temperature sensor, the air inlet valve, the smoke exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve and is used for controlling the opening/closing of the air inlet valve, the smoke exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve according to the temperature value acquired by the temperature sensor and a preset threshold value.
6. The blast furnace gas temperature regulating device according to claim 5, wherein the controller controls the opening/closing of the air intake valve, the smoke intake valve, the air exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve according to the temperature value collected by the sensor and a preset threshold value, comprising:
when the temperature of the blast furnace gas at the blast furnace gas outlet is smaller than a first preset threshold value, the first smoke exhaust valve, the air inlet valve and the air exhaust valve are closed, the smoke inlet valve and the second smoke exhaust valve are opened, and the exhaust fan is started, so that high-temperature smoke of the blast furnace hot blast stove sequentially passes through the first smoke exhaust valve, the first smoke/air transmission pipeline and the first smoke/air annular pipeline to enter the heat exchange cavity, heat exchange is carried out between the high-temperature smoke and the blast furnace gas in the plurality of heat exchange tubes, the low-temperature blast furnace gas is heated, and then the cooled smoke sequentially passes through the second smoke/air annular pipeline, the exhaust fan, the second smoke/air transmission pipeline and the air exhaust valve to be sent into the hot blast stove chimney for emission.
7. The blast furnace gas temperature regulating device according to claim 6, wherein the controller controls the opening/closing of the air intake valve, the smoke intake valve, the air exhaust valve, the first smoke exhaust valve and the second smoke exhaust valve according to the temperature value collected by the sensor and a preset threshold value, further comprising:
when the temperature of the blast furnace gas at the blast furnace gas outlet is higher than a second preset threshold value, opening the first smoke exhaust valve, the air inlet valve and the air exhaust valve, closing the smoke inlet valve and the second smoke exhaust valve, starting the exhaust fan, enabling external air to sequentially enter the heat exchange cavity through the air inlet valve, the first smoke/air transmission pipeline and the first smoke/air annular pipeline, exchanging heat with the blast furnace gas in the plurality of heat exchange tubes, cooling the blast furnace gas at a high temperature, and then sequentially discharging the warmed air through the second smoke/air annular pipeline, the exhaust fan, the second smoke/air transmission pipeline, the air exhaust valve and the air exhaust port; wherein the second pre-threshold is greater than the first pre-threshold.
8. A blast furnace gas temperature regulating device according to any one of claims 1-7, wherein the heat exchange chamber outer wall is provided with a heat insulating material.
9. A blast furnace gas dust removal system, comprising:
a blast furnace gas temperature regulating device according to any one of claims 1 to 8; and
gravity dust remover, BDC bag dust remover, TRT generator set, blast furnace hot blast stove and hot blast stove chimney;
the gravity dust remover is communicated with a blast furnace, and is sequentially communicated with the blast furnace gas temperature regulating device, the BDC bag dust remover, the TRT generator set, the blast furnace hot blast stove and the hot blast stove chimney, wherein the TRT generator set is also communicated with a blast furnace gas main pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162599.4A CN117265196A (en) | 2023-09-08 | 2023-09-08 | Blast furnace gas temperature regulating device and blast furnace gas dust removal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162599.4A CN117265196A (en) | 2023-09-08 | 2023-09-08 | Blast furnace gas temperature regulating device and blast furnace gas dust removal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117265196A true CN117265196A (en) | 2023-12-22 |
Family
ID=89205415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311162599.4A Pending CN117265196A (en) | 2023-09-08 | 2023-09-08 | Blast furnace gas temperature regulating device and blast furnace gas dust removal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117265196A (en) |
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2023
- 2023-09-08 CN CN202311162599.4A patent/CN117265196A/en active Pending
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