CN220083708U - Cement kiln waste heat power generation system for removing CO2 by utilizing solid absorbent - Google Patents
Cement kiln waste heat power generation system for removing CO2 by utilizing solid absorbent Download PDFInfo
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- CN220083708U CN220083708U CN202222889761.XU CN202222889761U CN220083708U CN 220083708 U CN220083708 U CN 220083708U CN 202222889761 U CN202222889761 U CN 202222889761U CN 220083708 U CN220083708 U CN 220083708U
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- solid absorbent
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- waste heat
- generation system
- heat power
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- 239000007787 solid Substances 0.000 title claims abstract description 44
- 230000002745 absorbent Effects 0.000 title claims abstract description 43
- 239000002250 absorbent Substances 0.000 title claims abstract description 43
- 239000002918 waste heat Substances 0.000 title claims abstract description 32
- 238000010248 power generation Methods 0.000 title claims abstract description 29
- 239000004568 cement Substances 0.000 title claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000007789 gas Substances 0.000 claims abstract description 33
- 230000008929 regeneration Effects 0.000 claims abstract description 33
- 238000011069 regeneration method Methods 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 6
- 238000006722 reduction reaction Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a method for removing CO by using a solid absorbent 2 Comprises a waste heat power generation system and CO 2 Removal system of the CO 2 The removal system comprises a heat exchanger, a gas mixer, a carbonator, a material circulation system, a regeneration reactor and condensationThe condensed water discharged from the condenser is heated into water vapor by superheated steam generated by a kiln head boiler and a kiln tail boiler in the waste heat power generation system, the water vapor is mixed with flue gas discharged by the waste heat power generation system in the gas mixer, and CO in the mixed gas 2 And the water vapor is absorbed by the solid absorbent in the carbonator, and the solid absorbent is sent to the regeneration reactor to be reduced by the material circulation system and releases CO 2 Gas and water vapor, CO 2 Separating gas and water vapor by condenser to obtain condensed water and CO 2 And (3) gas.
Description
Technical Field
The utility model mainly relates to the technical field of cement kiln waste heat power generation systems, in particular to a method for removing CO by using a solid absorbent 2 Is a cement kiln waste heat power generation system.
Background
Climate change is a serious challenge facing the 21 st century human beings, is a serious global problem deeply influencing the economic and social development and ecological environment of various countries, and actively copes with the climate change has become a global general consensus and trend. Carbon dioxide is captured, utilized and stored, and is widely focused by the international society as an emerging technology hopeful to realize large-scale low-carbon utilization of fossil energy. Chinese CO 2 The trapping technology is mature, and the existing trapping projects are mainly concentrated in the coal chemical industry, the thermal power industry and the like.
The cement industry is an important basic industry in national economy, the cement yield in China is the first world in nearly thirty years continuously, and is used as the world with the largest greenhouse gas emission, and the carbon capture and purification in the cement industry is a great measure for realizing the national strategy of environmental protection and emission reduction. But at present worldwide CO 2 Trapping and purifying technology has not been applied in the cement industry.
Thus, there is a need for a method for CO removal using solid absorbents 2 Is used for realizing the flue gas CO of the cement kiln system 2 Is used for collecting and purifying CO in China while exploring low-carbon green development accumulation experience for cement industry 2 The emission reduction has great environmental protection and economic value.
Disclosure of Invention
For cement kiln flue gas CO 2 The utility model aims to provide a method for removing CO by utilizing a solid absorbent 2 Can realize CO in kiln tail flue gas 2 And (3) removing and reducing the emission, and realizing the carbon emission reduction of the cement kiln waste heat power generation system.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
solid suctionCO removal by collector 2 Comprises a waste heat power generation system and CO 2 Removal system of the CO 2 The removal system comprises a heat exchanger, a gas mixer, a carbonator, a material circulation system, a regeneration reactor and a condenser, wherein condensed water discharged from the condenser is heated by superheated steam generated by a kiln head boiler and a kiln tail boiler in the waste heat power generation system to become steam, the steam is mixed with flue gas discharged by the waste heat power generation system in the gas mixer, and CO in the mixed gas is mixed with the flue gas discharged by the waste heat power generation system 2 And the water vapor is absorbed by the solid absorbent in the carbonator, and the solid absorbent is sent to the regeneration reactor to be reduced by the material circulation system and releases CO 2 Gas and water vapor, CO 2 Separating gas and water vapor by condenser to obtain condensed water and CO 2 And (3) gas.
Further, a first cyclone separator is arranged on the carbonator reactor and is used for separating dust-like solid absorbent and removed CO 2 The waste flue gas of the water vapor is separated, the regeneration reactor is provided with a second cyclone separator for separating dust-like solid absorbent and CO released from the solid absorbent 2 Separated from the water vapor.
Further, a cooling coil is arranged at the lower side in the carbonation reactor, a cold source of the cooling coil is cooling water in a deaerator in the waste heat power generation system, a heating coil is arranged at the lower side in the regeneration reactor, and heat sources of the heating coil are superheated steam generated by a kiln head boiler and a kiln tail boiler.
Further, the material circulation system is a conveyor.
Further, a circulating pipeline is arranged between the condenser and the regeneration reactor to separate CO from the condenser 2 Is fed into a regeneration reactor.
Further, the system also comprises a cement kiln system, wherein the cement kiln system comprises a grate cooler, a rotary kiln, a decomposing furnace, a preheater, a dust remover and a chimney.
Further, the first cyclone separator has been freed of CO 2 And sending the waste smoke of the water vapor into a chimney for emission.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a method for removing CO by using a solid absorbent 2 The system is based on a waste heat power generation system, and the solid absorbent is utilized to enable the dust-removed cement kiln tail flue gas to pass through CO 2 Capturing, absorbing, heating and analyzing to obtain high-purity CO meeting national standard 2 Thereby realizing the removal and emission reduction of carbon dioxide in kiln tail flue gas, promoting the healthy development of the cement industry in China and realizing the national overall carbon emission reduction target.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
wherein: 1-a heat exchanger; 2-a gas mixer; a 3-carbonation reactor; 4-cooling coils; 5-a material circulation system; 6-heating coil; 7-a regeneration reactor; 8-a condenser; 9-cyclone separator; 10-deaerator; 11-a steam turbine; a 12-generator; 13-a condenser; 14-kiln head boiler; 15-a preheater; 16-kiln tail boiler; 17-a dust remover; 18-a decomposing furnace; 19-a rotary kiln; 20-grate cooler; 21-chimney; 22-smoke valve; 23-circulation pipeline.
Detailed Description
Specific embodiments of the present utility model are further illustrated below with reference to the drawings and examples.
As shown in FIG. 1, a method for removing CO by using a solid absorbent 2 The cement kiln waste heat power generation system comprises a cement kiln system, a waste heat power generation system and CO 2 And (5) removing the system.
Wherein the cement kiln system comprises a grate cooler 20, a rotary kiln 19, a decomposing furnace 18, a preheater 15, a dust remover 17 and a chimney 21; the cement raw material of the preheater 15 is required to be preheated by the preheater 15 and decomposed by the decomposing furnace 18, then the material is fed into the cement rotary kiln 19 for calcination, the cement raw material is decomposed in the rotary kiln 19 to generate cement clinker, and finally, the high-temperature clinker discharged from the rotary kiln 19 is cooled to a reasonable temperature by the grate cooler 20.
The waste heat power generation system comprises a kiln head boiler 14, a kiln tail boiler 16, a steam turbine 11, a generator 12, a condenser 13 and a deaerator 10; the kiln head boiler 14 and the kiln tail boiler 16 generate superheated steam by utilizing the waste heat of a cement kiln system, the steam is mixed and then sent to the steam turbine 11 to do work to drive the generator 12 to generate power, the exhaust steam discharged by the steam turbine 11 doing work is sent to the condenser 13 and condensed into water, then flows through the condensate pump to enter the deaerator 10 to deoxidize, and then the deoxidized water is sent to the kiln head boiler 14 and the kiln tail boiler 16 by the water supply pump to generate superheated steam by heating.
The CO 2 The removal system comprises a heat exchanger 1, a gas mixer 2, a carbonator reactor 3, a first cyclone separator 9-1, a material circulation system 5, a regeneration reactor 7, a second cyclone separator 9-2 and a condenser 8.
The heat exchanger 1 is a coiled tube-countercurrent heat exchanger and is used for generating steam, so that the generation of chemical reaction in the carbonator reactor 3 is facilitated, and CO is better absorbed 2 The hot fluid comes from part of the superheated steam generated by the kiln head boiler 14 and the kiln tail boiler 16, the cold fluid comes from condensed water recovered by the condenser 8, the superheated steam heats the condensed water into steam and then is sent to the gas mixer 2, the superheated steam is changed into steam by utilizing the condensed water of the condenser 8, the waste of steam in the system is avoided, the superheated steam is changed into cooling water after releasing heat, and then the cooling water is sent to the kiln head boiler 14 and the kiln tail boiler 16 to be used as boiler feed water for recycling. Because the water recycled in the boiler kiln head boiler 14 and the kiln tail boiler 16 is desalted water, the cost is high, and the water in the condenser can adopt common tap water, the heat exchanger 1 can also save the running cost of the system.
The gas mixer 2 is provided with a steam inlet, a flue gas inlet and a mixed gas outlet, the steam inlet is connected with the heat exchanger 1, and the flue gas inlet is connected with a dust remover 17 of the cement kiln system; the mixed gas outlet is connected with the carbonator reactor 3; the gas mixer 2 is used for mixing the water vapor generated by the heat exchanger 1 with the CO which is not removed 2 Is sent into a carbonator reactor 3 for CO removal after fully mixing kiln tail flue gas 2 。
The carbonation reactor 3 is internally provided with a solid absorbent which can be used for reaction, and the main component of the solid absorbent is M 2 CO 3 M=na or K, and the solid absorbent performs carbonation reaction with the mixed gas input by the gas mixer 2 to absorb CO in the mixed gas 2 And water vapor, of the formula: m is M 2 CO 3 (s)+CO 2 (g)+H 2 O(g)→MHCO 3 (s), m=na or K.
The carbonator 3 is provided with a first cyclone 9-1 for separating dust-like solid absorbent and CO removed 2 The waste flue gas of the water vapor is separated, the waste flue gas is discharged out of the carbonator reactor 3 and is discharged into a chimney 21 of the cement kiln system through a fan, and the dust-like solid absorbent is left in the carbonator reactor 3.
The lower side in the carbonator reactor 3 is provided with a cooling coil 4, a cold source of the cooling coil 4 is cooling water in a deaerator 10 of the waste heat power generation system, a low-temperature environment is provided for the reaction in the carbonator reactor 3, heat generated by chemical reaction is absorbed, and the cooling water absorbs heat and is sent to the waste heat power generation system for reuse.
The regeneration reactor 7 is internally provided with an absorbed CO 2 Is (are) solid absorbent MHCO 3 M=na or K, will have absorbed CO 2 And the solid absorbent of water vapor to re-decompose CO 2 And steam so that the solid absorbent can be recycled, the chemical formula in the regeneration reactor 7 is: MHCO 3 (s)→M 2 CO 3 (s)+CO 2 (g)+H 2 O (g), m=na or K.
The regeneration reactor 7 is provided with a second cyclone separator 9-2 for separating dust-like solid absorbent and CO released from the solid absorbent 2 Separating from water vapour to remove CO 2 And the water vapor is sent to the condenser 8 for separation.
The lower side in the regeneration reactor 7 is provided with a heating coil 6, the heat source of the heating coil 6 is the superheated steam generated by a kiln head boiler 14 and a kiln tail boiler 16 of the waste heat power generation system, a high-temperature environment for decomposition reduction reaction is provided in the regeneration reactor 7, and the superheated steam is sent into the deaerator 10 for mixing after heat release.
A material circulating system 5 and materials are arranged between the carbonator reactor 3 and the regeneration reactor 7The circulation system 5 may be a conveyor for transporting the solid absorbent to absorb CO in the carbonation reactor 3 2 The solid absorbent in the regeneration reactor 7 is conveyed to the carbonation reactor 3, and the reduced solid absorbent in the regeneration reactor 7 is conveyed to realize the recycling.
The condenser 8 is used for condensing the water vapor separated from the regeneration reactor 7 into condensed water and separating CO 2 The gas and the water vapor are condensed into condensed water and then sent into the heat exchanger 1 for recycling, while the CO 2 The gas becomes high-purity CO by removing water vapor 2 The gas is passed through a condenser 8 and a regeneration reactor7A circulating pipeline 23 is arranged between the two, and partial CO is discharged through a fan 2 Is sent to a regeneration reactor 7 to ensure the production of high-purity CO 2 Another part of CO 2 Sending the mixture into a storage tank for collection and harmless treatment.
The CO 2 Superheated steam generated by waste heat through a heat exchanger 1 of the removal system and condensed water vapor recovered by a thermal condenser 8 are sent into a gas mixer 2, and CO is not removed in the gas mixer 2 2 Is fully mixed and then is sent into a carbonator reactor 3, and is cooled by a cooling coil 4 in the carbonator reactor 3 and is absorbed by a solid absorbent 2 And steam, remove CO 2 The flue gas is returned to the raw cement kiln system after passing through the first cyclone separator 9-1 and is discharged through a chimney 21.
CO absorption 2 The solid absorbent after water vapor is sent into a regeneration reactor 7 for regeneration through a material circulation system 5, and is sent into a carbonator reactor 3 for recycling through the material circulation system 5 after regeneration.
The regeneration reactor 7 utilizes superheated steam of a cement kiln waste heat power generation system to heat the heating coil 6 to realize regeneration, and CO separated after the regeneration 2 And the water vapor is sent into a condenser 8 to be condensed to obtain water vapor for separating CO 2 The condensed water is sent into the heat exchanger 1 for recycling.
Finally, it should be noted that: although the present utility model has been described in detail with reference to the embodiments, it should be understood that the utility model is not limited to the preferred embodiments, but is capable of modification and equivalents to some of the features described in the foregoing embodiments, but is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. CO removal by using solid absorbent 2 The cement kiln waste heat power generation system is characterized by comprising a waste heat power generation system and CO 2 Removal system of the CO 2 The removal system comprises a heat exchanger (1), a gas mixer (2), a carbonation reactor (3), a material circulation system (5), a regeneration reactor (7) and a condenser (8), wherein condensed water discharged from the condenser (8) is heated into steam through superheated steam generated by a kiln head boiler (14) and a kiln tail boiler (16) in the waste heat power generation system, the steam is mixed with flue gas discharged by the waste heat power generation system in the gas mixer (2), and CO in the mixed gas is mixed 2 And the water vapor is absorbed by a solid absorbent in the carbonator reactor (3), and the solid absorbent is sent to a regeneration reactor (7) for reduction through a material circulation system (5) and releases CO 2 Gas and water vapor, CO 2 The gas and the water vapor are separated by a condenser (8) and become condensed water and CO 2 And (3) gas.
2. CO removal with solid absorbent according to claim 1 2 Is characterized in that a first cyclone separator (9-1) is arranged on the carbonator reactor (3) and is used for absorbing dust-like solid absorbent and removing CO 2 The waste flue gas of water vapor is separated, a second cyclone separator (9-2) is arranged on the regeneration reactor (7) and is used for separating dust-shaped solid absorbent and CO released from the solid absorbent 2 Separated from the water vapor.
3. CO removal with solid absorbent according to claim 1 2 The cement kiln waste heat power generation system is characterized in thatThe cooling system is characterized in that a cooling coil (4) is arranged at the lower side in the carbonation reactor (3), a cold source of the cooling coil (4) is cooling water in a deaerator (10) in the waste heat power generation system, a heating coil (6) is arranged at the lower side in the regeneration reactor (7), and a heat source of the heating coil (6) is superheated steam generated by a kiln head boiler (14) and a kiln tail boiler (16).
4. CO removal with solid absorbent according to claim 1 2 The cement kiln waste heat power generation system is characterized in that the material circulation system (5) is a conveyor.
5. CO removal with solid absorbent according to claim 1 2 The cement kiln waste heat power generation system is characterized in that the condenser (8) and the regeneration reactor are7) A circulating pipeline (23) is arranged between the two to separate the CO separated by the condenser (8) 2 Feeding into a regeneration reactor7) Is a kind of medium.
6. CO removal with solid absorbent according to claim 1 2 The cement kiln waste heat power generation system is characterized by further comprising a cement kiln system, wherein the cement kiln system comprises a grate cooler (20), a rotary kiln (19), a decomposing furnace (18), a preheater (15), a dust remover (17) and a chimney (21).
7. CO removal with solid absorbent according to claim 2 2 Is characterized in that CO is removed by the first cyclone separator (9-1) 2 The waste flue gas of the water vapor is sent into a chimney (21) for discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222889761.XU CN220083708U (en) | 2022-10-31 | 2022-10-31 | Cement kiln waste heat power generation system for removing CO2 by utilizing solid absorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222889761.XU CN220083708U (en) | 2022-10-31 | 2022-10-31 | Cement kiln waste heat power generation system for removing CO2 by utilizing solid absorbent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220083708U true CN220083708U (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222889761.XU Active CN220083708U (en) | 2022-10-31 | 2022-10-31 | Cement kiln waste heat power generation system for removing CO2 by utilizing solid absorbent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220083708U (en) |
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- 2022-10-31 CN CN202222889761.XU patent/CN220083708U/en active Active
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