CN211813457U - System for catching and purifying carbon dioxide in cement clinker production line - Google Patents
System for catching and purifying carbon dioxide in cement clinker production line Download PDFInfo
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- CN211813457U CN211813457U CN201922402446.8U CN201922402446U CN211813457U CN 211813457 U CN211813457 U CN 211813457U CN 201922402446 U CN201922402446 U CN 201922402446U CN 211813457 U CN211813457 U CN 211813457U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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Abstract
The utility model discloses a system for cement clinker production line entrapment purification carbon dioxide. The system comprises a material preheating feeder, a feeding device, a heating chamber, an external heating type rotary kiln, a discharging device, a primary carbon dioxide dust remover, a carbon dioxide air cooler, a secondary carbon dioxide dust remover, a tertiary carbon dioxide dust remover, a liquid-solid carbon dioxide preparation system, an aggregate conveying device and a limestone powder bin; cement raw materials or limestone enter an external heating type rotary kiln after being preheated by a preheating device, carbon dioxide gas is generated after carbonate is thermally decomposed, and a food-grade liquid or solid carbon dioxide product is produced through a purification and recovery system; the calcined material is sent to a cement clinker production line as a raw material; and (4) conveying waste gas generated by heating to a decomposing furnace of a cement clinker production line. The utility model discloses a cement clinker production line reduces kiln tail waste gas carbon dioxide, sulfur dioxide's emission from raw materials entrapment purification carbon dioxide, produces the carbon dioxide product of high quality simultaneously.
Description
Technical Field
The utility model relates to a building materials production environmental protection equipment, in particular to system of cement clinker production line entrapment purification carbon dioxide.
Background
With the rapid increase of the emission of greenhouse gases such as carbon dioxide, the environmental problems such as global warming are becoming more severe, and the resulting greenhouse effect will seriously threaten the survival of human beings. The greenhouse gas emission accounts for 28% of the total global emission (90% of which is carbon dioxide), 29% of which is from the cement industry and accounts for about 8% of the total global greenhouse gas emission. The effective control and the continuous emission reduction of the carbon dioxide emission of cement products are realized, the control of the carbon dioxide emission is a serious challenge in the cement industry and is an important opportunity for realizing the technological progress of the cement industry.
The cement industry is currently classified by the nation as the key point that low-carbon treatment must be carried out. However, in addition to cement production from carbide slag and silico-calcium slag, the production of cement from limestone is currently relatively difficult to reduce carbon dioxide emissions. Therefore, how to recycle carbon dioxide generated in the cement kiln becomes a problem that the development of low-carbon economy and recycling economy cannot be avoided by the extended industrial chain of the cement industry. At present, the chemical adsorption method is adopted in the cement industry to capture and purify carbon dioxide in kiln tail waste gas, but the method has complex process and high operation cost, and cement manufacturers are not easy to accept and popularize because harmful impurities in the waste gas are more, the quality of the recovered carbon dioxide is low, and no economic benefit exists.
Disclosure of Invention
In view of the problems existing in the prior art, the utility model provides a system for cement clinker production line entrapment purification carbon dioxide. Organically combines the process characteristics of the existing cement clinker production line, realizes the capture and purification of carbon dioxide from raw materials by the cement clinker production line, reduces the emission of kiln tail waste gas carbon dioxide and sulfur dioxide, and simultaneously produces high-quality carbon dioxide products.
The utility model adopts the technical proposal that: a system for capturing and purifying carbon dioxide in a cement clinker production line is characterized in that: the system comprises a material preheating feeder, a feeding device, a heating chamber, an external heating type rotary kiln, a discharging device, a primary carbon dioxide dust remover, a carbon dioxide air cooler, a secondary carbon dioxide dust remover, a tertiary carbon dioxide dust remover, a liquid-solid carbon dioxide preparation system, an aggregate conveying device and a limestone powder bin; the material preheating feeder adopts a coil pipe structure, a material inlet is connected with a raw material preheater feeding pipeline, a third-stage preheater, a fourth-stage preheater feed opening and a limestone powder bin of a cement clinker production line through pipelines, and a material outlet of the material preheating feeder is connected with a feeding device; the heating chamber is connected with two ends of a cylinder of the external heating rotary kiln through sealing, and a waste gas outlet arranged at the upper part of the external heating rotary kiln is connected with a cement clinker production line decomposing furnace through a waste gas pipeline and a material preheating feeder; an air outlet at the upper part of the discharging device is connected with an air inlet pipeline of a first-stage carbon dioxide dust remover, the first-stage carbon dioxide dust remover adopts a cyclone structure, an air outlet at the upper part of the first-stage carbon dioxide dust remover is connected with a pipeline of a carbon dioxide air cooler, the carbon dioxide air cooler adopts a coil pipe structure, an air outlet of the carbon dioxide air cooler is connected with a pipeline of a second-stage carbon dioxide dust remover, a hot air outlet of the second-stage carbon dioxide dust remover is connected with a pipeline of a third-stage carbon dioxide dust remover, and an outlet of the third-stage carbon dioxide; the lower discharge ports of the discharging device, the first-stage carbon dioxide dust remover, the carbon dioxide air cooler, the second-stage carbon dioxide dust remover and the third-stage carbon dioxide dust remover are connected with the aggregate conveying device; the aggregate conveying device is connected with a kiln tail smoke chamber and a preheater feeding pipeline of a cement clinker production line through pipelines in a pneumatic conveying mode.
Second grade carbon dioxide dust remover, tertiary carbon dioxide dust remover adopt low-speed sack cleaner.
The heating chamber of the utility model is composed of a metal shell, an inner heat preservation layer and a fire-resistant layer, wherein the inner heat preservation layer adopts a nanometer heat preservation material, the thickness is 50-100mm, and the thickness of the fire-resistant layer is 100-200 mm.
The cylinder body of the external heating rotary kiln is formed by welding heat-resistant steel, and the horizontal inclination angle is 1-3 degrees.
The invention has the technical effects that: the method is combined with the existing cement clinker production line, the existing production line is not required to be greatly modified, the carbonate in the raw materials is completely or partially decomposed only in a raw material external heating type predecomposition mode, high-quality carbon dioxide can be recovered, the content of sulfur dioxide in kiln tail waste gas is reduced, the clinker yield is improved, the clinker heat consumption is reduced, and the economic and social benefits of a cement plant are improved. The high-quality carbon dioxide has wide application fields and high added value, has larger and larger market demand along with the improvement of the living standard of people, can be exported to peripheral countries, and has good economic and social benefits.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the system for capturing and purifying carbon dioxide in the cement clinker production line comprises a material preheating feeder 1, a feeding device 2, a heating chamber 3, an external heating type rotary kiln 4, a discharging device 5, a primary carbon dioxide dust remover 6, a carbon dioxide air cooler 7, a secondary carbon dioxide dust remover 8, a tertiary carbon dioxide dust remover 9, a liquid-solid carbon dioxide preparation system 10, an aggregate conveying device 11 and a limestone powder bin 16; the parts associated with the cement clinker production line include a raw meal preheater feed duct 12, a decomposing furnace 14, a first stage preheater 13-1, a second stage preheater 13-2, a third stage preheater 13-3, a fourth stage preheater 13-4, a fifth stage preheater 13-5, and a kiln tail gas chamber 15.
The material preheating feeder 1 adopts a coil pipe structure, a material inlet is connected with a raw material preheater feeding pipeline 12, a third-stage preheater 13-3, a fourth-stage preheater 13-4 feed opening and a limestone powder bin 16 of a cement clinker production line through pipelines, and a material outlet of the material preheating feeder 1 is connected with the feeding device 2; the heating chamber 3 is connected with two ends of a cylinder body of the external heating type rotary kiln 4 through sealing, and a waste gas outlet arranged at the upper part of the external heating type rotary kiln 4 is connected with a cement clinker production line decomposing furnace 14 through a waste gas pipeline and a material preheating feeder 1; an air outlet at the upper part of the discharging device 5 is connected with an air inlet pipeline of a first-stage carbon dioxide dust remover 6, the first-stage carbon dioxide dust remover 6 adopts a cyclone cylinder structure, an air outlet at the upper part of the first-stage carbon dioxide dust remover 6 is connected with a carbon dioxide air cooler 7 through a pipeline, the carbon dioxide air cooler 7 adopts a coil pipe structure, an air outlet of the carbon dioxide air cooler 7 is connected with a second-stage carbon dioxide dust remover 8 through a pipeline, a hot air outlet of the second-stage carbon dioxide dust remover 8 is connected with a third-stage carbon dioxide dust remover 9 through a pipeline, and an outlet of the third-stage carbon; the discharge ports at the lower parts of the discharge device 5, the primary carbon dioxide dust remover 6, the carbon dioxide air cooler 7, the secondary carbon dioxide dust remover 8 and the tertiary carbon dioxide dust remover 9 are connected with an aggregate conveying device 11; the aggregate conveying device 11 is connected with a kiln tail smoke chamber 15 and a preheater feeding pipeline 12 of a cement clinker production line in a pneumatic conveying mode through pipelines. The second-stage carbon dioxide dust remover 8 and the third-stage carbon dioxide dust remover 9 adopt low-speed bag-type dust removers.
The heating chamber 3 is composed of a metal shell, an inner heat preservation layer and a fire-resistant layer, wherein the inner heat preservation layer is made of nanometer heat preservation materials and is 100mm thick, and the fire-resistant layer is made of refractory bricks or refractory castable and is 200mm thick. The cylinder body of the external heating type rotary kiln 4 is formed by welding heat-resistant steel, and the horizontal inclination angle is 2 degrees. The heating chamber 3 can adopt coal gas as a heat source to uniformly heat the external heating type rotary kiln 4, and the low-level heating value of the used fuel is 1450kcal/Nm3。
The working principle of the system for capturing and purifying carbon dioxide in the cement clinker production line is as follows: 20% of raw materials at the outlet of a third preheater 13-3 of a cement clinker production line are sent into an external heating type rotary kiln 4 through a feeding device 2, and after being heated and calcined by a heating chamber 3, carbonate in the raw materials is decomposed into oxides and carbon dioxide and is discharged through a discharging device 5, wherein the decomposition rate of the carbonate is more than 95%. The carbon dioxide raw gas discharged from the upper part of the discharging device 5 is pre-dedusted by a first-stage carbon dioxide deduster 6, enters a carbon dioxide air cooler 7 for cooling, and then sequentially enters a second-stage carbon dioxide deduster 8 and a third-stage carbon dioxide dedusterThe dust content of carbon dioxide at the outlet of the third-stage carbon dioxide dust remover 9 is less than 1mg/Nm3And then sent to a liquid-solid carbon dioxide preparation system 10 to be prepared into a food-grade solid carbon dioxide product. Normal temperature air is sent into the carbon dioxide air cooler 7 through a fan and then enters the heating chamber 3 as combustion-supporting air. The materials discharged from the lower parts of the first-stage carbon dioxide dust remover 6, the carbon dioxide air cooler 7, the second-stage carbon dioxide dust remover 8 and the third-stage carbon dioxide dust remover 9 are converged in an aggregate conveying device 11 and then conveyed to a kiln tail smoke chamber 15 and a preheater feeding pipeline 12 of the cement clinker production line through pneumatic conveying, so that the emission reduction of the kiln tail waste gas, namely carbon dioxide and sulfur dioxide, of the cement clinker production line is realized.
The liquid-solid carbon dioxide preparation system 10 adopts cooling, three-stage compression, desulfurization, drying, purification, liquefaction and solidification processes to prepare liquid and solid carbon dioxide.
Cement raw materials or limestone enter an external heating type rotary kiln after being preheated, carbon dioxide gas is generated after carbonate is heated and decomposed, and a food-grade liquid or solid carbon dioxide product is produced through a liquid-solid carbon dioxide preparation system; the calcined material is sent to a cement clinker production line as a raw material; and (4) conveying waste gas generated by heating to a decomposing furnace of a cement clinker production line.
Claims (4)
1. A system for capturing and purifying carbon dioxide in a cement clinker production line is characterized in that: the system comprises a material preheating feeder (1), a feeding device (2), a heating chamber (3), an external heating type rotary kiln (4), a discharging device (5), a primary carbon dioxide dust remover (6), a carbon dioxide air cooler (7), a secondary carbon dioxide dust remover (8), a tertiary carbon dioxide dust remover (9), a liquid-solid carbon dioxide preparation system (10), an aggregate conveying device (11) and a limestone powder bin (16); the material preheating feeder (1) adopts a coil pipe structure, a material inlet is connected with a raw material preheater feeding pipeline (12), a third-stage preheater (13-3) and a fourth-stage preheater (13-4) feed opening of a cement clinker production line and a limestone powder bin (16) through pipelines, and a material outlet of the material preheating feeder (1) is connected with the feeding device (2); the heating chamber (3) is connected with two ends of a cylinder body of the external heating type rotary kiln (4) through sealing, and a waste gas outlet arranged at the upper part of the external heating type rotary kiln (4) is connected with a cement clinker production line decomposing furnace (14) through a waste gas pipeline and a material preheating feeder (1); an air outlet at the upper part of the discharging device (5) is connected with an air inlet pipeline of a first-stage carbon dioxide dust remover (6), the first-stage carbon dioxide dust remover (6) adopts a cyclone cylinder structure, an air outlet at the upper part of the first-stage carbon dioxide dust remover (6) is connected with a carbon dioxide air cooler (7) through a pipeline, the carbon dioxide air cooler (7) adopts a coil pipe structure, an air outlet of the carbon dioxide air cooler (7) is connected with a second-stage carbon dioxide dust remover (8) through a pipeline, a hot air outlet of the second-stage carbon dioxide dust remover (8) is connected with a third-stage carbon dioxide dust remover (9) through a pipeline, and an outlet of the third-stage carbon dioxide dust remover (9); the discharge ports at the lower parts of the discharge device (5), the primary carbon dioxide dust remover (6), the carbon dioxide air cooler (7), the secondary carbon dioxide dust remover (8) and the tertiary carbon dioxide dust remover (9) are connected with the aggregate conveying device (11); the aggregate conveying device (11) is connected with a kiln tail smoke chamber (15) and a preheater feeding pipeline (12) of a cement clinker production line through pipelines in a pneumatic conveying mode.
2. The system for capturing purified carbon dioxide in a cement clinker production line as claimed in claim 1, wherein: the second-stage carbon dioxide dust remover (8) and the third-stage carbon dioxide dust remover (9) adopt low-speed bag dust removers.
3. The system for capturing purified carbon dioxide in a cement clinker production line as claimed in claim 1, wherein: the heating chamber (3) is composed of a metal shell, an inner heat-insulating layer and a fire-resistant layer, wherein the inner heat-insulating layer is made of a nanometer heat-insulating material and has a thickness of 50-100mm, and the fire-resistant layer has a thickness of 100-200 mm.
4. The system for capturing purified carbon dioxide in a cement clinker production line as claimed in claim 1, wherein: the cylinder body of the external heating type rotary kiln (4) is formed by welding heat-resistant steel, and the horizontal inclination angle is 1-3 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922402446.8U CN211813457U (en) | 2019-12-27 | 2019-12-27 | System for catching and purifying carbon dioxide in cement clinker production line |
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| CN201922402446.8U CN211813457U (en) | 2019-12-27 | 2019-12-27 | System for catching and purifying carbon dioxide in cement clinker production line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746131A (en) * | 2019-11-29 | 2020-02-04 | 天津健威泽节能环保科技股份有限公司 | Method for trapping and purifying CO by using external combustion type rotary kiln in cement kiln2And emission reduction system and method |
| CN110921667A (en) * | 2019-12-27 | 2020-03-27 | 天津健威泽节能环保科技股份有限公司 | System for capturing and purifying carbon dioxide in cement clinker production line and implementation method |
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- 2019-12-27 CN CN201922402446.8U patent/CN211813457U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746131A (en) * | 2019-11-29 | 2020-02-04 | 天津健威泽节能环保科技股份有限公司 | Method for trapping and purifying CO by using external combustion type rotary kiln in cement kiln2And emission reduction system and method |
| CN110921667A (en) * | 2019-12-27 | 2020-03-27 | 天津健威泽节能环保科技股份有限公司 | System for capturing and purifying carbon dioxide in cement clinker production line and implementation method |
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