CN201297860Y - Device for calcining cement by utilizing acetylene sludge to completely substitute the limestone - Google Patents

Abstract

The utility model relates to a device for calcining cement by utilizing acetylene sludge to completely substitute the limestone, which comprises an outside-kiln dry-method pre-decomposition system outside the kiln that consists of a whirlwind pre-heater system, a decomposition furnace, a rotary kiln and a coal feeding system, and is characterized in that the pre-heater system is formed by connecting a primary, a secondary and a tertiary whirlwind pre-heaters; inlets of the primary and the secondary whirlwind pre-heaters are respectively connected with a feeding port of a wind pipe and iare respectively connected with a distributing valve A through a feeding chute; the decomposition furnace is of a spurt decomposition furnace with an upper distribution and a lower distribution, and a feeding port of the decomposition furnace is connected with a discharging port of the secondary whirlwind pre-heater, and a distributing valve B is arranged at a feeding position of the decomposition furnace, and a lower reduced opening of the decomposition furnace and a feeding port of the tertiary whirlwind pre-heater are respectively connected with the rotary kiln through a kiln tail smoke chamber, and the diameter and the length of the rotary kiln are increased; the whirlwind pre-heater system can be of a single-series or a double-series. The device has the advantages that the acetylene sludge is used to substitute the limestone in 100 percent, thereby greatly reducing the heat loss and reducing the exhaustion of the carbon dioxide; the weight and the height of the device can be greatly reduced, thereby reducing the cost.

Description

A kind of device of calcining cement by carbide slag replacing whole limestone

Technical field

The utility model belongs to technical field of inorganic nonmetallic materials, particularly a kind of device of calcining cement by carbide slag replacing whole limestone grog.

Background technology

The carbide slag main component is Ca (OH) ₂, with carbide slag replace lime stone produce clinker be the comprehensive utilization carbide slag important by way of, not only can eliminate environmental pollution, realize the recycling treatment of carbide slag, can also effectively reduce the manufacture of cement hear rate, save limestone resource, reach the purpose of environmental protection, energy-conservation, recycling.China utilizes carbide slag to produce clinker at present, main wet-process rotary kiln and the shaft kiln technology of adopting, along with the continuous progress and the resource of technology of producing cement are deficient day by day, the new dry cement production technology of " wet grinding and dry burning " and " dry grinding dry combustion method " that with the carbide slag is raw material is developed, but the recycling treatment of carbide slag and the outer predecomposition device of existing dry method kiln utilize the admixture ratio of carbide slag all not high at present, the ratio of utilizing carbide slag replace lime stone at most can't 100% be utilized carbide slag replace lime stone calcination of cement clinker also just about 50%.

Summary of the invention

The utility model provides a kind of device of calcining cement by carbide slag replacing whole limestone grog for the recycling treatment that solves present carbide slag and the outer predecomposition device of existing dry method kiln can't 100% utilize the difficult problem of carbide slag replace lime stone calcination of cement clinker.This device adopts secondary or three grades of preheaters to add " high-temp combustion, low-temperature decomposition " dore furnace and handles carbide slag, can 100% utilizes carbide slag replace lime stone calcination of cement clinker.This device fully takes into account special physics of carbide slag and chemical property, and the technical advantage of the outer precalcining system of combination dry method kiln, realized that the outer precalcining system 100% of dry method kiln utilizes the new breakthrough of carbide slag replace lime stone calcination of cement clinker, thereby can effectively reduce the manufacture of cement hear rate, save limestone resource.

The technical scheme that the utility model is taked is: a kind of device of calcining cement by carbide slag replacing whole limestone, be by the cyclone preheater system, dore furnace, the outer precalcining system of the dry method kiln that rotary kiln and coal feeding system connect to form, be characterized in: described pre-heating system is made up of three grades of cyclone preheaters, the air outlet of next stage cyclone preheater links to each other with the air inlet of upper level cyclone preheater by connecting airduct, the feed opening of upper level cyclone preheater connects airduct by the import of the continuous next stage cyclone preheater of tremie pipe scraper-trough conveyer, the feeding mouth that the import of first order cyclone preheater and second level cyclone preheater is connected airduct connects material distributing valve one by emission of baiting chute respectively, described dore furnace is to have the type dore furnace that spurts of sub-material up and down, its feeding mouth is connected by the discharging opening of emission of baiting chute with second level cyclone preheater, on the cyclone preheater emission of baiting chute of the second level material distributing valve two is installed; Described rotary kiln is connected with kiln tail smoke-box, and kiln tail smoke-box is connected with the following reducing of dore furnace and the feed opening of three grades of cyclone preheaters respectively.

The utility model can also be taked following technical measures:

A kind of device of calcining cement by carbide slag replacing whole limestone is characterized in: described rotary kiln diameter increases and the length lengthening.

A kind of device of calcining cement by carbide slag replacing whole limestone is characterized in: described cyclone preheater system is single series or bi serie cyclone preheater system.

Advantage that the utlity model has and good effect:

A kind of device of calcining cement by carbide slag replacing whole limestone, owing to adopted technical solutions of the utility model, compared with prior art, have following characteristics: 1, carry out the sub-material adjustment, realize that the secondary of kiln tail preheater system or three grades of preheatings promptly realize the switching between secondary cyclone preheater or the three grades of cyclone preheaters by a pair of raw material of material distributing valve.2, by the material distributing valve two at the charging aperture connection elephant trunk place of the type dore furnace that spurts of sub-material is up and down arranged, the raw material of going into dore furnace are carried out sub-material adjustment up and down, appropriate design in conjunction with dore furnace wind, material, coal, dore furnace is divided into a plurality of functional areas, can realizes " high-temp combustion, low-temperature decomposition " function of dore furnace.3, the rotary kiln diameter increases and the length lengthening, can make preheating zone and the branch lengthening that ungirds, and the prolongation temperature is lower and have a certain proportion of secondary to synthesize CaCO ₃Preheating of going into the kiln raw material and resolving time, reach better effect.4, can realize the large-scale recycling treatment of carbide slag, realize the purpose of social recycling economy, reduce manufacture of cement hear rate and enterprise's production cost significantly, reduce CO ₂Discharging, reduce the greenhouse gases effect; 5, the kiln tail system weight of equipment of unit product weight reduces significantly, reduces the whole height of clinker production equipment, has reduced equipment cost and corresponding civil engineering cost.

Description of drawings

Fig. 1 is a single series precalcining system structure chart of the present utility model.

Label among the figure is respectively: the 1st, and material distributing valve the, the 2nd, one-level cyclone preheater, the 3rd, secondary cyclone preheater, 4 are three grades of cyclone preheaters, the 5th, dore furnace, the 6th, material distributing valve the two, the 7th, kiln tail smoke-box, the 8th, rotary kiln, the 9th, coal feeding system.

The specific embodiment

For further understanding utility model content of the present utility model, characteristics and effect, exemplify following example now, and conjunction with figs. is described in detail as follows:

See also Fig. 1, the dry method kiln of being made up of dore furnace, preheater, rotary kiln and coal feeding system that a kind of device that utilizes calcining cement by carbide slag replacing whole limestone, this device adopt is precalcining system outward.Kiln tail precalcining system mainly is made up of one-level cyclone preheater 2, secondary cyclone preheater 3, three grades of cyclone preheaters 4 and dore furnace 5.One-level cyclone preheater 2, secondary cyclone preheater 3 and three grades of cyclone preheaters 4 are efficient low-resistance type cyclone preheater, the air outlet of next stage cyclone preheater links to each other with the air inlet of upper level cyclone preheater by connecting airduct, and the feed opening of upper level cyclone preheater connects airduct by the import of the continuous next stage cyclone preheater of tremie pipe scraper-trough conveyer; The feeding mouth that the import of first order cyclone preheater and second level cyclone preheater is connected airduct connects material distributing valve one by emission of baiting chute respectively; The raw material of feeding kiln tail preheater system at first carry out the sub-material adjustment by a pair of raw material of going into kiln tail system of material distributing valve, divide material import to connect airduct into first order cyclone preheater or second level whirlwind cyclone preheater, realize secondary or three grades of preheatings of pre-heating system, promptly realize the switching between secondary cyclone preheater or the three grades of cyclone preheaters, dore furnace is to have the type dore furnace that spurts of sub-material up and down, or other can realize the dore furnace of " high-temp combustion; low-temperature decomposition ", its feeding mouth is connected by the discharging opening of emission of baiting chute with second level cyclone preheater, on the cyclone preheater emission of baiting chute of the second level material distributing valve two is installed; Tertiary air from the heat of kiln hood divides the two-way head-on collision radially to enter the lower prop of the stove that spurts, fuel from coal feeding system 9 adopts special burner to spray into dore furnace from the lower prop tertiary air inlet top of the stove that spurts, and stable ignition and conflagration in the hot environment of pure air, feed the lower prop and the top of main stove respectively by elephant trunk from the pre-thermal material of following second level whirlwind tube, the raw material of going into dore furnace by 26 pairs of material distributing valves carry out sub-material adjustment up and down, in conjunction with dore furnace wind, material, the appropriate design of coal, dore furnace is divided into a plurality of functional areas, realize " high-temp combustion; low-temperature decomposition " function of dore furnace, promptly should control lower carbide slag decomposition temperature, reach the desired higher temperature of coal dust firing again.Simultaneously, consider the properties such as loose thickness, accumulation pressure and flowability of carbide slag, on the interior details of the kiln tail precalcining system of forming by one-level cyclone preheater 2, secondary cyclone preheater 3, three grades of cyclone preheaters 4 and dore furnace 5, also should take into full account, take the specific aim design on main tremie pipe flap valve and the material-strewing device, guarantee the unimpeded of material.Enter by kiln tail smoke-box 7 through the material after the kiln tail precalcining system pre-thermal decomposition and to carry out clinker burning in the rotary kiln 8 and make clinker.Because it is lower and have a certain proportion of secondary to synthesize CaC0 to go into the temperature of kiln raw material ₃In rotary kiln, there is preheating zone and a branch long slightly to ungird than the nsp kiln of raw meal prepared from lime, therefore the specification and the length of rotary kiln 8 are suitably amplified, the coal feeding system 9 of kiln head and tail, also should carry out suitable adjustment according in the rotary kiln and the variation that takes place in the dore furnace, the kiln hood rotary kiln is fed the coal amount will be increased to some extent, kiln tail dore furnace is fed the coal amount and will be reduced significantly, and the firing system hear rate will decrease.

Operation principle of the present utility model is, carbide slag enters secondary cyclone preheater or three grades of cyclone preheaters by material distributing valve one, under the drive of hot blast, realize secondary or three grades of preheatings, the carbide slag of preheating is fed the lower prop and the top of dore furnace respectively by elephant trunk through second level whirlwind tube, the raw material of going into dore furnace by 26 pairs of material distributing valves carry out sub-material adjustment up and down, after coal dust and carbide slag enter dore furnace by tripper, owing to controlled dore furnace wind, material and coal add implantation site and addition, coal dust is higher than under 850 ℃ of conditions in temperature to burn, carbide slag decomposes under 380-550 ℃ temperature, and keep the dore furnace outlet temperature to be controlled at 550-750 ℃, realize " high-temp combustion; low-temperature decomposition " function of dore furnace.Entering rotary kiln through the carbide slag after the kiln tail precalcining system pre-thermal decomposition by kiln tail smoke-box carries out clinker burning and makes clinker.

Claims (3)

1, a kind of device of calcining cement by carbide slag replacing whole limestone, be by the cyclone preheater system, dore furnace, the outer precalcining system of the dry method kiln that rotary kiln and coal feeding system connect to form, it is characterized in that: described pre-heating system is made up of three grades of cyclone preheaters, the air outlet of next stage cyclone preheater links to each other with the air inlet of upper level cyclone preheater by connecting airduct, the feed opening of upper level cyclone preheater connects airduct by the import of the continuous next stage cyclone preheater of tremie pipe scraper-trough conveyer, the feeding mouth that the import of first order cyclone preheater and second level cyclone preheater is connected airduct connects material distributing valve one by emission of baiting chute respectively, described dore furnace is to have the type dore furnace that spurts of sub-material up and down, its feeding mouth is connected by the discharging opening of emission of baiting chute with second level cyclone preheater, on the cyclone preheater emission of baiting chute of the second level, material distributing valve two is installed, described rotary kiln is connected with kiln tail smoke-box, and kiln tail smoke-box is connected with the following reducing of dore furnace and the feed opening of three grades of cyclone preheaters respectively.

2, the device of calcining cement by carbide slag replacing whole limestone according to claim 1 is characterized in that: described rotary kiln diameter increases and the length lengthening.

3, the device of calcining cement by carbide slag replacing whole limestone according to claim 1 is characterized in that: described cyclone preheater system is single series or bi serie cyclone preheater system.

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