CN112267920A - Closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and fuel gas circulating waste heat utilization - Google Patents
Closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and fuel gas circulating waste heat utilization Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 214
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 107
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 107
- 239000002918 waste heat Substances 0.000 title claims abstract description 42
- 238000010248 power generation Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 16
- 239000002737 fuel gas Substances 0.000 title claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 36
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004202 carbamide Substances 0.000 claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 230000008020 evaporation Effects 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000003345 natural gas Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 claims 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 241000124008 Mammalia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/04—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a closed supercritical carbon dioxide power generation system and method with carbon capture utilization and gas circulation waste heat utilization. The system takes natural gas as fuel, adopts a pure oxygen combustion mode, and realizes the complete capture of carbon dioxide by flue gas through a carbon dioxide recovery device; the supercritical carbon dioxide expands in the high-pressure turbine and the low-pressure turbine to do work, so that the turbine produces more work and the cycle efficiency is improved; in addition, the power generation system is connected with industrial urea preparation, namely, the carbon dioxide is used as a raw material for urea preparation after being completely captured, the ammonia liquid enters a waste heat recovery device to absorb the waste heat of the flue gas, and the ammonia liquid and the captured and recovered carbon dioxide enter a urea synthesis tower together after being pressurized to generate urea, and a finished product is obtained through a flash evaporation process. The process not only effectively utilizes the circulating waste heat of the supercritical carbon dioxide, but also realizes capture and utilization of the carbon dioxide in the flue gas, embodies environmental friendliness and realizes clean and green power supply.
Description
Technical Field
The invention belongs to the technical field of supercritical carbon dioxide thermal power generation, and relates to a closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and fuel gas circulating waste heat utilization.
Background
With the rapid development of national economy and the rapid improvement of national industrialization level, the demand for electric power is getting larger and larger, and how to efficiently utilize energy becomes a focus of common attention of various national scholars. At present, the conventional steam Rankine cycle power generation system is limited by problems such as materials, and therefore, the power generation efficiency is difficult to further improve. Under the same temperature condition of the working medium at the turbine inlet, the high power generation efficiency can be achieved by adopting the supercritical carbon dioxide Brayton cycle.
Supercritical carbon dioxide (S-CO)2) The power generation technology is a new power generation technology taking supercritical carbon dioxide as a Brayton thermodynamic cycle working medium. The carbon dioxide has the characteristics of stable chemical property (metal corrosion is not easy), high energy density (small equipment volume), no toxicity, low cost, low compression coefficient, large specific heat, high diffusion coefficient and the like, the critical pressure of the carbon dioxide is 7.390MPa, the carbon dioxide is easy to realize in practical engineering, the critical temperature is 31.060 ℃, and the carbon dioxide can be cooled to be near the critical point or condensed into a liquid state by a cold source in a natural environment. Carbon dioxide can be used as a working fluid for power cycle, and when the working fluid state in the cycle reaches above the critical point, a so-called supercritical carbon dioxide cycle, CO, is formed2The supercritical fluid is between gas and liquid, has the double characteristics of gas and liquid, has the density close to that of liquid and the viscosity close to that of gas, has the diffusion coefficient nearly hundreds times that of liquid and has considerable heat efficiency. Research shows that when the temperature of a working medium at the inlet of the turbine is 650 ℃, the cycle efficiency of the power generation system adopting supercritical water as the working medium is about 45%, and the cycle efficiency of the supercritical carbon dioxide Brayton cycle can reach about 48%. The supercritical carbon dioxide Brayton cycle power generation technology has the characteristics of saving energy, environmental protection and high heat efficiency, can be combined with various conventional heat source systems for application, and is considered to be one of the promising directions for future power generation.
Disclosure of Invention
The invention aims to provide a closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and fuel gas circulating waste heat utilization, which not only effectively improve the efficiency of a generator set, but also capture and utilize carbon dioxide in flue gas and overcome the defect of environmental pollution in the traditional power generation industry.
In order to achieve the aim, the closed supercritical carbon dioxide power generation system with carbon capture and utilization and fuel gas circulating waste heat utilization and the method thereof comprise a supercritical carbon dioxide Brayton circulating power generation system and a urea preparation production line. The power cycle side of the supercritical carbon dioxide Brayton cycle power generation system comprises a high-pressure turbine, a low-pressure turbine, a power generator, a high-temperature heat regenerator, a low-temperature heat regenerator, a precooler, a carbon dioxide compressor, an economizer, a low-temperature superheater, a high-temperature superheater, a combustor and a waste heat recoverer; the urea preparation production line comprises a carbon dioxide recovery device, a carbon dioxide high-pressure pump, an ammonia liquid high-pressure pump, a urea synthesis tower, a flash evaporation tank and a urea storage tank.
In the supercritical carbon dioxide Brayton power generation system, a carbon dioxide high-pressure turbine outlet is connected with a low-pressure turbine inlet, a low-pressure turbine outlet sequentially passes through a high-temperature heat regenerator hot side, a low-temperature heat regenerator hot side, a precooler and carbon dioxide compressor, a low-temperature heat regenerator cold side is connected with a high-temperature heat regenerator cold side inlet, and a high-temperature heat regenerator cold side outlet sequentially passes through an economizer, a low-temperature superheater and a high-temperature superheater which are arranged in a flue and then is connected with a high-pressure turbine inlet. The high-pressure turbine, the low-pressure turbine and the generator are coaxially arranged. In the system, carbon dioxide passes through an economizer, a low-temperature superheater and a high-temperature superheater (after being heated to a high-temperature and high-pressure state, the carbon dioxide respectively expands through a high-pressure turbine and a low-pressure turbine to do work, exhaust steam passes through a high-temperature reheater, a low-temperature reheater and a precooler, is cooled and depressurized to be close to a critical state, then enters a carbon dioxide compressor to be pressurized, and is heated through the economizer, the low-temperature superheater and the high-temperature superheater, and the cycle is completed.
On the industrial preparation side of urea, ammonia liquor enters from a cold side inlet of a waste heat recoverer, an outlet of the waste heat recoverer is connected with an inlet of an ammonia liquor high-pressure pump, and an outlet of the ammonia liquor high-pressure pump is connected with an ammonia liquor inlet of a urea synthesis tower; and the carbon dioxide separated and recovered from the flue gas is used as a raw material to enter a carbon dioxide high-pressure pump, the outlet of the carbon dioxide high-pressure pump is connected with the carbon dioxide feed inlet of the urea synthesis tower, the ammonia liquid and the carbon dioxide react in the urea synthesis tower to generate an ammonium carbamate solution, the ammonium carbamate solution enters a flash evaporation tank to be evaporated, the outlet of the flash evaporation tank is connected with the inlet of a urea storage tank, and a finished product is stored in the storage tank.
The invention has the following beneficial effects:
the closed supercritical carbon dioxide Brayton power generation system adopting indirect gas heating takes natural gas as fuel and adopts a pure oxygen combustion mode, and flue gas realizes the complete capture of carbon dioxide through a carbon dioxide recovery device; the supercritical carbon dioxide expands in the high-pressure turbine and the low-pressure turbine to do work, and because the carbon dioxide has excellent properties, the mode ensures that the turbine produces more work and improves the cycle efficiency; in addition, the power generation system is coupled with industrial urea preparation, namely, the carbon dioxide is used as a raw material for urea preparation after being completely captured, the ammonia liquid enters a waste heat recoverer to absorb the waste heat of the flue gas so as to improve the waste heat utilization rate, and the ammonia liquid and the captured and recovered carbon dioxide react in a synthesis tower after being pressurized so as to generate urea. Urea is used in a wide range of applications, not only as a fertilizer, but also as an industrial raw material and as a feed for mammals. The production line utilizes the flue gas waste heat and the recovered and collected carbon dioxide, realizes green power generation theoretically, and improves the energy utilization efficiency.
Drawings
FIG. 1 is a schematic diagram of the structure of the method of the present invention.
Wherein 1 is a high-pressure turbine, 2 is a low-pressure turbine, 3 is a generator, 4 is a high-temperature heat regenerator, 5 is a low-temperature heat regenerator, 6 is a precooler, 7 is a carbon dioxide compressor, 8 is an economizer, 9 is a low-temperature superheater, 10 is a high-temperature superheater, 11 is a combustor, 12 is a waste heat recoverer, 13 is a carbon dioxide recovery device, 14 is a carbon dioxide high-pressure pump, 15 is an ammonia liquid high-pressure pump, 16 is a urea synthesis tower, 17 is a flash evaporation tank, and 18 is a urea storage tank.
Detailed Description
The method of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the closed supercritical carbon dioxide power generation system with carbon capture and utilization and gas circulation waste heat utilization and the method thereof provided by the present invention, wherein the supercritical carbon dioxide brayton power generation system includes a high pressure turbine 1, a low pressure turbine 2, a generator 3, a high temperature regenerator 4, a low temperature regenerator 5, a precooler 6, a carbon dioxide compressor 7, and an economizer 8, a low temperature superheater 9, a high temperature superheater 10, a combustor 11, and a waste heat recoverer 12 arranged in a flue. The outlet of the carbon dioxide high-pressure turbine 1 is connected with the inlet of the low-pressure turbine 2, the outlet of the low-pressure turbine 2 is connected with the inlet of the hot side of the high-temperature regenerator 4, the outlet of the hot side of the high-temperature regenerator 4 is connected with the inlet of the hot side of the low-temperature regenerator 5, the outlet of the hot side of the low-temperature regenerator 5 is connected with the inlet of the hot side of the precooler 6, the outlet of the hot side of the precooler 6 is connected with the inlet of the hot side of the precooler 7, the outlet of the carbon dioxide compressor 7 is connected with the inlet of the cold side of the low-temperature regenerator 5, the outlet of the cold side of the low-temperature regenerator 5 is connected with the inlet of the cold side of the high-temperature regenerator 4, the outlet of the cold side. The high-pressure turbine 1 and the low-pressure turbine 2 are arranged coaxially with the generator 3. Natural gas and oxygen enter a combustor 11, an outlet of the combustor 11 is connected with a flue gas side inlet of a high-temperature superheater 10, a flue gas side outlet of the high-temperature superheater 10 is connected with a flue gas side inlet of a low-temperature superheater 9, a flue gas side outlet of the low-temperature superheater 9 is connected with a flue gas side inlet of an economizer 8, a flue gas side outlet of the economizer 8 is connected with a flue gas side inlet of a waste heat recoverer 12, and a flue gas side outlet of the waste heat recoverer 12 is connected with an inlet of a carbon dioxide.
According to the closed supercritical carbon dioxide power generation system and the closed supercritical carbon dioxide power generation method with carbon capture utilization and fuel gas circulation waste heat utilization, ammonia liquid enters from a cold side inlet of a waste heat recoverer 12 at a urea production side, a cold side outlet of the waste heat recoverer 12 is connected with an inlet of an ammonia liquid high-pressure pump 15, and an outlet of the ammonia liquid high-pressure pump 15 is connected with an ammonia liquid feeding hole of a urea synthesis tower 16; carbon dioxide separated and recovered from flue gas is used as a raw material and enters a carbon dioxide high-pressure pump 14 from an outlet of a carbon dioxide recovery device 13, an outlet of the carbon dioxide high-pressure pump (14) is connected with a carbon dioxide feeding hole of a urea synthesizing tower 16, an outlet of the urea synthesizing tower 16 is connected with an inlet of a flash evaporation tank 17, and an outlet of the flash evaporation tank 17 is connected with an inlet of a urea storage tank 18.
The working medium side working process of the supercritical carbon dioxide Brayton cycle power generation system is as follows: the carbon dioxide expands in the carbon high-pressure turbine 1 and the low-pressure turbine to do work, a turbine output shaft drives a coaxial generator to work, the output exhaust gas passes through the hot side of the carbon dioxide high-temperature regenerator 4 and the hot side of the low-temperature regenerator 5 to heat the working medium on the cold side of the carbon dioxide high-temperature regenerator, the carbon dioxide at the outlet of the hot side of the regenerator is cooled by the precooler 6 and boosted by the carbon dioxide compressor 7 and then enters the cold side of the carbon dioxide low-temperature regenerator 5, then enters the cold side of the high-temperature regenerator 4 to be continuously heated to utilize the waste heat of the carbon dioxide exhaust gas, the working medium output by the cold side of the high-temperature regenerator 4 is sequentially heated to the design temperature through the economizer 8, the low-temperature superheater 9 and the high-temperature superheater 10 to form the high-.
The flue gas side working process of the supercritical carbon dioxide Brayton cycle power generation system is as follows: the natural gas and the oxygen gas enter a combustor 11 for combustion in a proper proportion, the generated high-temperature flue gas sequentially passes through a high-temperature superheater 10, a low-temperature superheater 9 and an economizer 8 to heat the boosted low-temperature high-pressure carbon dioxide working medium, then passes through a flue gas waste heat recoverer 12 to heat ammonia liquid, the flue gas flows through the waste heat recoverer 12 and then enters a carbon dioxide recovery device 13, and the carbon dioxide recovery device 13 separates and stores carbon dioxide in the flue gas as a raw material.
Since the critical temperature of carbon dioxide is low, the precooler 6 is air-cooled.
Claims (7)
1. A closed supercritical carbon dioxide power generation system with carbon capture utilization and gas circulation waste heat utilization and a method thereof are characterized in that a closed supercritical carbon dioxide Brayton power generation system indirectly heated by gas is adopted to utilize a high-grade heat source of flue gas to a greater extent; ammonia liquid required by the industrial preparation of urea absorbs the waste heat of flue gas through a waste heat recoverer (12) positioned at the tail part of a flue and is heated to the reaction temperature; the flue gas enters a carbon dioxide recovery device (13) after being cooled and heat exchanged, and the recovered carbon dioxide is used as a raw material to react with ammonia liquor to participate in the preparation of urea.
2. The closed supercritical carbon dioxide power generation system and the method with carbon capture utilization and gas cycle waste heat utilization according to claim 1 are characterized in that the supercritical carbon dioxide brayton power generation system comprises a high-pressure turbine (1), a low-pressure turbine (2), a power generator (3), a high-temperature regenerator (4), a low-temperature regenerator (5), a precooler (6), a carbon dioxide compressor (7), and an economizer (8), a low-temperature superheater (9), a high-temperature superheater (10), a combustor (11) and a waste heat recoverer (12) which are arranged in a flue. In the system, carbon dioxide passes through an economizer (8), a low-temperature superheater (9) and a high-temperature superheater (10) and then is heated to a high-temperature high-pressure state, then expansion work is performed through a high-pressure turbine and a low-pressure turbine respectively, exhaust steam passes through a high-temperature reheater (4), a low-temperature reheater (5) and a precooler (6), then is cooled and depressurized to be close to a critical state, then enters a carbon dioxide compressor (7) to be pressurized, and is heated through the economizer (8), the low-temperature superheater (9) and the high-temperature superheater (10), and thus circulation is completed.
3. The closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and fuel gas recycling waste heat utilization according to claim 1 is characterized in that an industrial urea production line comprises a carbon dioxide recovery device (13), a carbon dioxide high-pressure pump (14), an ammonia liquid high-pressure pump (15), a urea synthesis tower (16), a flash tank (17) and a urea storage tank (18). The production line utilizes the flue gas waste heat and the recovered and collected carbon dioxide, realizes green power generation theoretically, and improves the energy utilization efficiency.
4. The closed supercritical carbon dioxide power generation system and the method with the carbon capture utilization and the gas circulation waste heat utilization of claim 2 are characterized in that an outlet of a carbon dioxide high-pressure turbine (1) is connected with an inlet of a low-pressure turbine (2), an outlet of the low-pressure turbine (2) sequentially passes through a hot side of a high-temperature regenerator (4), a hot side of a low-temperature regenerator (5), a hot side of a precooler (6) and a carbon dioxide compressor (6), an outlet of the carbon dioxide compressor (6) is sequentially connected with a cold side of the low-temperature regenerator (5) and a cold side of the high-temperature regenerator (4), and an outlet of the cold side of the high-temperature regenerator (4) sequentially passes through an economizer (8), a low-temperature superheater (9) and a high-temperature superheater (10) arranged in a. The high-pressure turbine (1) and the low-pressure turbine (2) are coaxially arranged with the generator (3).
5. The closed supercritical carbon dioxide power generation system and the method with carbon capture utilization and gas circulation waste heat utilization of claim 2 are characterized in that natural gas and oxygen enter a combustor (11), an outlet of the combustor (11) is connected with a flue gas side inlet of a high temperature superheater (10), a flue gas side outlet of the high temperature superheater (10) is sequentially connected with a low temperature superheater (9), an economizer (8) and a waste heat recoverer (12), an outlet of the waste heat recoverer (12) is connected with an inlet of a carbon dioxide recovery device (13), and the carbon dioxide recovery device (13) stores the captured carbon dioxide for later use.
6. The closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and gas circulation waste heat utilization of claim 3 is characterized in that on one side of a urea production line, ammonia liquid enters from a cold side inlet of a waste heat recoverer (12), an outlet of the waste heat recoverer is connected with an inlet of an ammonia liquid high-pressure pump (15), and an outlet of the ammonia liquid high-pressure pump (15) is connected with an ammonia liquid inlet of a urea synthesis tower (16). Carbon dioxide separated and recovered from the flue gas enters a carbon dioxide high-pressure pump (14) as a raw material, the outlet of the carbon dioxide high-pressure pump (14) is connected with a carbon dioxide feed inlet of a urea synthesis tower (16), the outlet of the urea synthesis tower (16) is connected with the inlet of a flash evaporation tank (17), and the outlet of the flash evaporation tank (17) is connected with the inlet of a urea storage tank (18).
7. The closed supercritical carbon dioxide power generation system and method with carbon capture and utilization and gas circulation waste heat utilization according to claim 2 is characterized in that the precooler (6) adopts air cooling.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109548A (en) * | 2021-11-24 | 2022-03-01 | 西安热工研究院有限公司 | Supercritical carbon dioxide power generation system and method based on ammonia fuel chemical looping combustion |
| CN114135353A (en) * | 2021-12-01 | 2022-03-04 | 中国核动力研究设计院 | System and method for starting supercritical carbon dioxide device with fixed quality control |
| CN115288819A (en) * | 2022-08-11 | 2022-11-04 | 山东大学 | Supercritical CO under oxygen-enriched combustion of coal 2 Recompression Brayton cycle coupling carbon capture novel combined system and simulation method |
-
2020
- 2020-09-14 CN CN202010984189.8A patent/CN112267920A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109548A (en) * | 2021-11-24 | 2022-03-01 | 西安热工研究院有限公司 | Supercritical carbon dioxide power generation system and method based on ammonia fuel chemical looping combustion |
| CN114135353A (en) * | 2021-12-01 | 2022-03-04 | 中国核动力研究设计院 | System and method for starting supercritical carbon dioxide device with fixed quality control |
| CN115288819A (en) * | 2022-08-11 | 2022-11-04 | 山东大学 | Supercritical CO under oxygen-enriched combustion of coal 2 Recompression Brayton cycle coupling carbon capture novel combined system and simulation method |
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Application publication date: 20210126 |