CN213433779U - On-line totally-enclosed high-activity desulfurization process facility for cement clinker production line - Google Patents
On-line totally-enclosed high-activity desulfurization process facility for cement clinker production line Download PDFInfo
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- CN213433779U CN213433779U CN202022190418.7U CN202022190418U CN213433779U CN 213433779 U CN213433779 U CN 213433779U CN 202022190418 U CN202022190418 U CN 202022190418U CN 213433779 U CN213433779 U CN 213433779U
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Abstract
The utility model provides an online totally-enclosed high-activity desulfurization process facility of a cement clinker production line, which comprises a raw material preheating system, a rotary kiln smoke chamber, a waste gas pipeline, a cooling pipe, an independent cyclone separator, a draught fan, a desulfurizer preparation device, a desulfurizer conveying device and an oxygenation device, wherein the raw material preheating system comprises a five-stage cyclone separator, the waste gas pipeline is communicated with an air outlet of the first-stage cyclone separator, a last-stage ascending pipeline is connected between an air inlet of the first-stage cyclone separator and an air outlet of a secondary cyclone separator, a last-stage blanking pipe is connected between a blanking port of the last-stage cyclone separator and the rotary kiln smoke chamber, the cooling pipe is communicated between the last-stage blanking pipe and an air inlet of the independent cyclone separator, the draught fan is communicated with the air outlet of the independent cyclone separator, the blanking port of the independent cyclone separator is communicated with a feeding port of the desulfurizer preparation device, and, the oxygen increasing device supplies oxygen to the last section of ascending pipeline.
Description
Technical Field
The utility model relates to a flue gas desulfurization technical field, specific theory has related to an online totally closed high activity desulfurization process facilities of cement clinker production line.
Background
SO generated during calcination of cement clinkerxMainly with large amounts of SO2And a small amount of SO3Two forms exist, in which a portion is derived from the feedstock and a portion is derived from the fuel. SO discharged with exhaust gasxThe sulfide and organic sulfur in raw material are produced at 400-600 deg.C, and pass through flue gas pipeline, humidifying tower and raw material mill, most of them are absorbed by raw material, and fed into preheater again, and take part in external circulation, and a small portion of them are discharged into atmosphere by means of dust-removing device to produce atmospheric pollution and SOxAs one of the main atmospheric pollutants, China has come out to strictly control SOxAn emission related indicator.
Currently, the reduction of SO is commonly used in cement clinker production linesxThe methods of discharge can be summarized as the following three methods:
（1）Ca(OH)2a desulfurization method; utilizes purchased CaO or decomposed materials with high CaO content extracted on line to generate Ca (OH) after long-term outdoor placement2Then conveyed to the outlet of the secondary cyclone, enters the primary cyclone along with the raw material and contains SO2The ascending gas flow is mixed and combined to generate CaSO3Then, CaSO3Oxidation to form stable CaSO4The next stage of circulation is carried out along with the materials, and the desulfurization method has the advantages of simple method, small investment and suitability for SO2The cement clinker production line with lower emission concentration is not ideal for the cement clinker production line with higher emission concentration.
The main reaction formula is as follows:
2CaO+H2O→2Ca(OH)2
Ca(OH)2+SO2→CaSO3+H2O
2CaSO3+O2→2CaSO4
（2）CaCO3a slurry desulfurization method; the method utilizes the kiln tail return ash to prepare CaCO with better fluidity3Slurry is conveyed to the top of the slurry tower by special equipment and contains SO2The ascending gas flow is fully mixed, combined and oxidized to generate CaSO4Its advantage is that SO in waste gas after raw material mill is stopped2Emission concentration of not more than 1000 mg/Nm3In the process, the treatment can still reach the standard, but the defects are complex process, large occupied area, large investment and high operating cost.
The main reaction formula is as follows:
SO2+O2→SO3
SO3+HO2→H2SO4
CaCO3+H2SO4→CaSO4+HO2
(3) wet desulfurization with ammonia water; namely, ammonia water is sprayed into the outlet of the primary cyclone, and the ammonia water and SO-containing ammonia water are utilized2Is fully mixed and combined to generate (NH)3）2SO4The defect is high operation cost, and ammonia escape can be formed due to poor control, so that secondary pollution is caused.
The main reaction formula is as follows:
SO2+O2→SO3
SO3+HO2→H2SO4
NH3·H2O+H2SO4→（NH3）2SO4
in order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the defects of the prior art, thereby providing a totally-enclosed cement clinker production line online totally-enclosed high-activity desulfurization process facility which has no dust, no extra additive, no damage to the production system, good desulfurization effect and low desulfurization cost.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: an online totally-enclosed high-activity desulfurization process facility of a cement clinker production line comprises a raw material preheating system, a rotary kiln smoke chamber, a waste gas pipeline, a cooling pipe, an independent cyclone separator, a draught fan, a desulfurizer preparation device, a desulfurizer conveying device and an oxygenation device, wherein the raw material preheating system comprises five-stage cyclone separators, the waste gas pipeline is communicated with an air outlet of a first-stage cyclone separator, a tail-section ascending pipeline is connected between an air inlet of the first-stage cyclone separator and an air outlet of a second-stage cyclone separator, a last-stage blanking pipe is connected between a blanking port of the last-stage cyclone separator and the rotary kiln smoke chamber, the cooling pipe is communicated between the last-stage blanking pipe and the air inlet of the independent cyclone separator, the draught fan is communicated with the air outlet of the independent cyclone separator, the blanking port of the independent cyclone separator is communicated with the feed port of, the output end of the desulfurizer preparation device is communicated with the last section ascending pipeline through the desulfurizer conveying device, and the oxygen increasing device supplies oxygen to the last section ascending pipeline.
Based on the above, desulfurizer preparation facilities includes one set at least reaction equipment and storage silo, reaction equipment includes the reactor, communicates inlet pipe and feed liquor pipe on the reactor, be provided with pneumatic valve on the inlet pipe, the feed end intercommunication of inlet pipe the feed opening of independent cyclone, be provided with the powder measurement appearance in the reactor, be provided with the fluidflowmeter on the feed liquor pipe, the discharge gate intercommunication of reactor the feed inlet of storage silo, the output of storage silo with desulfurizer conveyor's input butt joint.
On the basis, be connected with the unloading house steward on independent cyclone's the feed opening, install the airlock valve on the unloading house steward, the inlet pipe is connected on the unloading house steward.
Based on the above, be provided with the charge level indicator on the storage silo, be provided with the agitator in the discharge gate of storage silo, the discharge gate of storage silo has connected gradually batcher and powder balance.
Based on the above, the desulfurizer conveying device comprises an air chute conveyor, a screw conveyor and a lifter which are connected in sequence, wherein the input end of the air chute conveyor is communicated with the output end of the powder scale, and the output end of the lifter is communicated with the last section of ascending pipeline.
Based on the above, the oxygenation device is a high pressure fan.
Based on the above, the output end of the desulfurizer conveying device is communicated with the vertical section of the tail section ascending pipeline through a downward sliding inclined pipe.
Based on the above, a high-pressure discrete nozzle is arranged on the last section ascending pipeline, the high-pressure discrete nozzle is arranged right below the discharging end of the lower sliding inclined tube, and the air outlet of the high-pressure fan is communicated with the high-pressure discrete nozzle.
Based on the above, a material distributing valve is arranged at the joint of the cooling pipe and the final-stage blanking pipe.
Based on the above, the air outlet of draught fan pass through a blast pipe with exhaust duct intercommunication.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the utility model, the cooling pipe, the independent cyclone separator, the desulfurizer preparation device, the desulfurizer conveying device and the original five-stage cyclone separator in the cement clinker production line are utilized to form a closed circulating system; after being heated by the raw material preheating system and the decomposing furnace, the decomposition rate of raw materials in the final-stage blanking pipe reaches about 95%, the content of CaO is about 40%, the temperature is about 860 ℃, the raw materials are guided into the cooling pipe to be reduced to a proper temperature, then the raw materials enter the independent cyclone separator to separate gas and solid, wherein the induced draft fan provides power for the independent cyclone separator, and the separated powder enters the desulfurizer preparation device to prepare Ca (OH)2(ii) a Is conveyed into the last section ascending pipeline through the desulfurizer conveying device and is mixed with SO in the ascending flue gas2Reaction to produce CaSO3Meanwhile, the oxygen increasing device ensures the sufficient oxygen content to ensure that CaSO3Is fully oxidized into CaSO4Finally, returning the cement clinker to the rotary kiln together with other materials to generate cement clinker, and realizing the solidification of sulfide; in the falling process, the original connection mode between the five-stage cyclone separators is utilized, and the five-stage cyclone separators can be continuously connected with each otherThe flue gas in the stage ascending pipeline reacts, so that the desulfurization effect is ensured, no additional additive is required to be introduced in the whole process, the original production system cannot be damaged, and the desulfurization cost is lower; the method has the advantages of full sealing, no dust emission, no additional additive, no damage to a production system, good desulfurization effect and low desulfurization cost.
Furthermore, the powder material weighing instrument and the liquid flowmeter are arranged, so that the proportion of powder material and water can be accurately controlled, the full reaction is ensured, the storage bin has a temporary storage function on the prepared desulfurizer, and the smooth operation of the system is ensured; the arrangement of the air locking valve can avoid the influence of negative pressure caused by the induced draft fan on subsequent blanking, so that powder in the blanking main pipe is more stable; the setting of charge level indicator conveniently observes the desulfurizer storage capacity, the agitator conveniently breaks up the material, the batcher with the powder balance conveniently outwards carries the desulfurizer and measures the desulfurizer quantity of carrying.
Furthermore, after the desulfurizer is conveyed horizontally by the air chute conveyor and the screw conveyor in sequence, the desulfurizer is lifted above the last section of ascending pipeline by the lifter; the lower sliding inclined pipe can enable a desulfurizing agent to enter the tail section ascending pipeline more smoothly; the high-pressure dispersion nozzle is arranged right below the output end of the lower sliding inclined tube, so that high-pressure air and a desulfurizer can be fully mixed, and the reaction effect is improved; the air outlet of the draught fan is communicated with the waste gas pipeline through an exhaust pipe, so that waste gas is conveniently and intensively discharged.
Drawings
FIG. 1 is a schematic structural view of an on-line totally-enclosed high-activity desulfurization process facility of a medium cement clinker production line.
In the figure: 1. a decomposing furnace; 2. a rotary kiln smoke chamber; 3. a primary cyclone separator; 4. a secondary cyclone separator; 5. a final stage cyclone; 6. an exhaust gas conduit; 7. a final riser pipe; 8. a last-stage blanking pipe; 9. a material distributing valve; 10. a cooling tube; 11. a separate cyclone separator; 12. an induced draft fan; 13. a blanking main pipe; 14. a wind locking valve; 15. a feed pipe; 16. a liquid inlet pipe; 17. a reactor; 18. a pneumatic valve; 19. a liquid flow meter; 20. a powder metering instrument; 21. a storage bin; 22. a level gauge; 23. a stirrer; 24. a feeder; 25. weighing the powder; 26. an air chute conveyor; 27. a screw conveyor; 28. a hoist; 29. a lower slide chute; 30. a high pressure fan; 31. a high pressure dispersion nozzle; 32. an exhaust pipe.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
As shown in figure 1, the on-line totally-enclosed high-activity desulfurization process facility for the cement clinker production line comprises a raw material preheating system, a decomposing furnace 1, a rotary kiln smoke chamber 2 and a waste gas pipeline 6, wherein the raw material preheating system comprises a five-stage cyclone separator, the waste gas pipeline 6 is communicated with an air outlet of a primary cyclone separator 3, a tail-section ascending pipeline 7 is connected between an air inlet of the primary cyclone separator 3 and an air outlet of a secondary cyclone separator 4, and a tail-stage discharging pipe 8 is connected between a discharging port of the final cyclone separator 5 and the rotary kiln smoke chamber 2.
In order to degrade SO in the systemXThe on-line totally-enclosed high-activity desulfurization process facility for the cement clinker production line is also provided with a cooling pipe 10, an independent cyclone separator 11, an induced draft fan 12, a desulfurizer preparation device, a desulfurizer conveying device and an oxygenation device, wherein the cooling pipe 10 is communicated between a final-stage blanking pipe 8 and an air inlet of the independent cyclone separator 11, a material distributing valve 9 is arranged at the joint of the cooling pipe 10 and the final-stage blanking pipe 8 so as to select powder in the final-stage blanking pipe 8 to flow to a rotary kiln smoke chamber 2 or the independent cyclone separator 11, the induced draft fan 12 is communicated with an air outlet of the independent cyclone separator 11 to provide a negative pressure environment for the independent cyclone separator 11, provide power for the flow of the powder in the cooling pipe 10, and in the flow process, the cooling pipe 10 cools the powder to a required temperature. The feed opening of the independent cyclone separator 11 is communicated with the feed opening of the desulfurizer preparation device, powder after gas-solid separation enters the desulfurizer preparation device to be prepared into desulfurizer, and the output end of the desulfurizer preparation device is communicated with the desulfurizer conveying device through the desulfurizer conveying deviceThe last section ascending pipeline 7 is communicated, and the oxygen increasing device supplies oxygen to the last section ascending pipeline 7 to ensure that a desulfurizing agent, oxygen and SO are suppliedXThe gas fully reacts in the last segment ascending pipe 7 to achieve the fixed SOXThe purpose of, the air outlet of draught fan 12 through a blast pipe 32 with exhaust duct 6 intercommunication makes things convenient for waste gas to concentrate the emission.
A blanking main pipe 13 is connected to a blanking port of the independent cyclone separator 11, and an air locking valve 14 is arranged on the blanking main pipe 13, so that powder in the blanking main pipe 13 can be kept stable, and the influence of negative pressure caused by the induced draft fan 12 on subsequent blanking is avoided; the desulfurizer preparation device comprises two sets of reaction equipment and a storage bin 21, wherein the reaction equipment comprises a reactor 17, a feeding pipe 15 and a liquid inlet pipe 16 which are communicated with the reactor 17, a pneumatic valve 18 is arranged on the feeding pipe 15, the feeding end of the feeding pipe 15 is connected with the output end of a feeding main pipe 13, a powder metering instrument 20 is arranged in the reactor 17, a liquid flow meter 19 is arranged on the liquid inlet pipe 16, the discharging port of the reactor 17 is communicated with the feeding port of the storage bin 21, the proportion of powder and water can be controlled through the powder metering instrument 20 and the liquid flow meter 19, so that the reaction is complete, the storage bin 21 plays a temporary storage role in the prepared desulfurizer, a material level meter 22 is arranged on the storage bin 21, the stock is convenient to observe, a stirrer 23 is arranged in the discharging port of the storage bin 21 to prevent the desulfurizer from caking, the discharging port of the storage bin 21 is sequentially connected with a feeding machine 24 and, the desulfurizer can be conveniently output outwards and the conveying amount can be recorded.
The desulfurizer conveying device specifically comprises an air chute conveyor 26, a screw conveyor 27 and a lifter 28 which are connected in sequence, wherein the input end of the air chute conveyor 26 is communicated with the output end of the powder scale 25, and the output end of the lifter 28 is communicated with the vertical section of the tail section ascending pipeline 7 through a down-sliding inclined pipe 29; when in conveying, the desulfurizer output from the powder weigher 25 is firstly horizontally conveyed by the air chute conveyor 26 and the screw conveyor 27, is lifted by the lifter 28, and then slides into the last section ascending pipeline 7 from the lower slide inclined tube 29.
The oxygen increasing device is specifically a high-pressure fan 30, a high-pressure dispersion nozzle 31 is arranged on the last section ascending pipeline 7, the high-pressure dispersion nozzle 31 is arranged right below the discharging end of the lower sliding inclined pipe 29, and an air outlet of the high-pressure fan 30 is communicated with the high-pressure dispersion nozzle 31; the high pressure fan 30 inputs high pressure air into the last section ascending pipeline 7 through the high pressure dispersion nozzle 31, and the high pressure air is fully mixed with the desulfurizer and the ascending flue gas, so that the reaction is complete.
The working principle is as follows:
firstly, after raw materials are heated by the raw material preheating system and the decomposing furnace, the decomposition rate of the raw materials in the final-stage discharging pipe 8 reaches about 95%, the content of CaO is about 40%, the temperature is about 860 ℃, the powder is guided into the cooling pipe 10 by using the material distributing valve 9 and is mixed with cold air, and after heat dissipation in the cooling pipe 10 and gas-solid separation of the independent cyclone separator 11, the temperature is reduced to below 300 ℃, so that the conditions of storage and transportation are met; then, the airlock valve 14 and the pneumatic valve 18 are opened, the cooled powder enters the reactor 17, the powder is weighed by the powder meter 20, and a certain proportion of water is injected into the reactor 17 through the liquid inlet pipe 16 to react the cooled powder and the reactor to generate Ca (OH)2As a desulfurizer, entering the storage bin 21 for temporary storage; finally, the desulfurizer is sent into the last section ascending pipe 7 by the desulfurizer conveying device and is mixed with SO in the flue gasXOxygen in the high-pressure air is fully mixed to generate CaSO4Continuously mixed, reacted and separated with the ascending flue gas by a five-stage cyclone separator, and finally combined in a rotary kiln together with other materials to generate cement clinker, thus finishing SOXCuring of (2).
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (10)
1. The utility model provides an online totally closed high activity desulfurization process facility of cement clinker production line, includes that raw materials preheats system, rotary kiln smoke chamber and exhaust duct, the raw materials preheats the system and includes five-stage cyclone, exhaust duct and first-stage cyclone air outlet intercommunication are connected with the last section pipeline that rises between first-stage cyclone air intake and the secondary cyclone air outlet, last-stage cyclone feed opening with be connected with last stage unloading pipe between the rotary kiln smoke chamber, its characterized in that: it still includes cooling tube, independent cyclone, draught fan, desulfurizer preparation facilities, desulfurizer conveyor and oxygenation device, the cooling tube intercommunication is in the last feed pipe with between independent cyclone's the air intake, the draught fan intercommunication independent cyclone's air outlet, independent cyclone's feed opening intercommunication desulfurizer preparation facilities's feed inlet, desulfurizer preparation facilities's output passes through desulfurizer conveyor with the minor matters tedge intercommunication, the oxygenation device to the oxygen suppliment in the minor matters tedge.
2. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in claim 1, characterized in that: the desulfurizer preparation facilities includes one set of reaction equipment and storage silo at least, reaction equipment includes the reactor, communicates inlet pipe and feed liquor pipe on the reactor, be provided with pneumatic valve on the inlet pipe, the feed end intercommunication of inlet pipe the feed opening of independent cyclone, be provided with the powder measurement appearance in the reactor, be provided with the fluidflowmeter on the feed liquor pipe, the discharge gate intercommunication of reactor the feed inlet of storage silo, the output of storage silo with desulfurizer conveyor's input butt joint.
3. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in claim 2, characterized in that: the feeding device is characterized in that a feeding main pipe is connected to a feeding opening of the independent cyclone separator, an air locking valve is installed on the feeding main pipe, and the feeding pipe is connected to the feeding main pipe.
4. An on-line totally-enclosed high-activity desulfurization process facility of a cement clinker production line according to claim 2 or 3, characterized in that: the material storage device is characterized in that a material level meter is arranged on the storage bin, a stirrer is arranged in a discharge hole of the storage bin, and the discharge hole of the storage bin is sequentially connected with a feeder and a powder scale.
5. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in claim 4, characterized in that: the desulfurizer conveying device comprises an air chute conveyor, a screw conveyor and a lifter which are connected in sequence, wherein the input end of the air chute conveyor is communicated with the output end of the powder scale, and the output end of the lifter is communicated with the last section of ascending pipeline.
6. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in any one of claims 1, 2, 3 and 5, characterized in that: the oxygenation device is a high-pressure fan.
7. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in claim 6, characterized in that: and the output end of the desulfurizer conveying device is communicated with the vertical section of the tail section ascending pipeline through a down-sliding inclined pipe.
8. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in claim 7, characterized in that: and a high-pressure discrete nozzle is arranged on the last section ascending pipeline and is arranged right below the discharging end of the lower sliding inclined tube, and an air outlet of the high-pressure fan is communicated with the high-pressure discrete nozzle.
9. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in any one of claims 1, 2, 3, 5, 7 and 8, characterized in that: and a material distributing valve is arranged at the joint of the cooling pipe and the final-stage blanking pipe.
10. The cement clinker production line on-line totally-enclosed high-activity desulfurization process facility as claimed in claim 9, characterized in that: the air outlet of the draught fan is communicated with the waste gas pipeline through an exhaust pipe.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513154A (en) * | 2024-05-13 | 2024-08-20 | 西安建筑科技大学 | Device and method for gradient removal of iron particles by multi-stage cyclone separator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513154A (en) * | 2024-05-13 | 2024-08-20 | 西安建筑科技大学 | Device and method for gradient removal of iron particles by multi-stage cyclone separator |
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