CN215208467U - Coupling chemical chain reaction and CO2High-efficiency low-energy-consumption hydrogen electric heating cold poly-generation system for separation and trapping - Google Patents
Coupling chemical chain reaction and CO2High-efficiency low-energy-consumption hydrogen electric heating cold poly-generation system for separation and trapping Download PDFInfo
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- CN215208467U CN215208467U CN202022611766.7U CN202022611766U CN215208467U CN 215208467 U CN215208467 U CN 215208467U CN 202022611766 U CN202022611766 U CN 202022611766U CN 215208467 U CN215208467 U CN 215208467U
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- 238000005485 electric heating Methods 0.000 title claims description 7
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- 239000000446 fuel Substances 0.000 claims abstract description 79
- 238000002407 reforming Methods 0.000 claims abstract description 44
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- 238000000746 purification Methods 0.000 claims abstract description 36
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 239000002918 waste heat Substances 0.000 claims description 40
- 239000002737 fuel gas Substances 0.000 claims description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 29
- 229910052760 oxygen Inorganic materials 0.000 claims description 29
- 239000001301 oxygen Substances 0.000 claims description 29
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 25
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 41
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 9
- 238000001816 cooling Methods 0.000 description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
- Y02P20/10—Process efficiency
-
- 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
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
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Abstract
Coupling chemical chain reaction and CO2The system comprises a chemical chain gasification reforming unit A, a gas treatment purification unit B, a chemical chain hydrogen production unit C and a combined cycle power generation and poly-generation unit D, wherein the chemical chain gasification reforming unit A is connected with the gas treatment purification unit B, the gas treatment purification unit B is connected with the chemical chain hydrogen production unit C, the combined cycle power generation and poly-generation unit D, and the chemical chain hydrogen production unit C is connected with the combined cycle power generation and poly-generation unit D. The utility model discloses utilize the chemical chain reaction of carbonaceous fuel to prepare high-purity H2And simultaneously capturing CO2The hydrogen-electricity-heat-cold poly-generation system is constructed by combining a fuel cell, a gas-steam combined cycle, an absorption type refrigerating device and the like. The system and the method have the advantages of low investment, low energy consumption and cost, high efficiency and wide application.
Description
Technical Field
The utility model belongs to the carbon-containing fuel hydrogen and CO production2A trapping and energy chemical poly-generation system, in particular to a hydrogen-electricity-heat-cold poly-generation system.
Background
The efficient and clean utilization of energy is important for energy conservation, emission reduction and sustainable development. Carbonaceous fuels such as coal, petroleum, natural gas, biomass, organic solid waste and the like are mainly utilized by combustion. Not only does fuel combustion produce a significant loss of available energy and a large amount of pollutants, but also the emission of CO2Can aggravate global warming and bring disastrous results to human beings. In order to meet the requirements of energy conservation, environmental protection and sustainable development, the carbon-containing fuel is converted into H2While CO produced by the conversion process2Trapping, and combining gas-steam combined cycle power generation, a more efficient and cleaner advanced energy utilization system can be constructed. Conventional processes first convert carbonaceous fuels to H at high temperature and pressure by gasification or reforming2And a gaseous fuel containing CO as a main component, and subjecting the gaseous fuel to water gas shift to obtain H2And CO2Then the CO is separated by physical absorption, chemical absorption, membrane separation and other methods2Separating, trapping and obtaining high-purity H2. Therefore, the traditional method needs to be provided with a gasification furnace, a cryogenic air separation oxygen production device, a water gas shift device and special CO2The separation and collection device not only has high investment, but also produces oxygen and CO2The energy consumption for trapping is very large, and H is produced2The cost is high. Also, H prepared by conventional methods2Mainly used for chemical synthesis and does not exert H2The energy-saving device has the advantages of high efficiency and clean energy.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model discloses utilize the chemical chain reaction of the carbonaceous fuel to prepare high-purity H2And simultaneously capturing CO2The hydrogen-electricity-heat-cold poly-generation system is constructed by combining a fuel cell, a gas-steam combined cycle, an absorption type refrigerating device and the like. The system and the method have the advantages of small investment, low energy consumption and cost, high efficiency and wide applicationAnd (4) point.
In order to solve the technical problem, the technical scheme of the utility model as follows:
coupling chemical chain reaction and CO2The high-efficiency low-energy-consumption hydrogen electric heating cold poly-generation system comprises a chemical chain gasification reforming unit, a gas treatment purification unit, a chemical chain hydrogen production unit and a combined cycle power generation and poly-generation unit, wherein,
the chemical-looping gasification reforming unit is used for carrying out oxidation-reduction reaction on the carbon-containing fuel and the solid oxygen carrier under the action of a gasification agent or a reforming agent so as to convert the carbon-containing fuel into high-quality fuel gas;
the gas treatment and purification unit is used for carrying out heat recycling, dust removal and purification on the fuel gas obtained by gasification and reforming and the oxygen-deficient air of the oxygen carrier regeneration device to obtain clean fuel gas and clean oxygen-deficient air;
a chemical chain hydrogen production unit which converts hydrogen elements in water vapor into high-purity H based on the cyclic oxidation-reduction reaction of a metal oxygen carrier2Oxidation of clean fuel gas to produce high purity CO2Simultaneously realizes the preparation of high-purity H2And CO2Trapping, the prepared pure hydrogen is used for chemical synthesis, transportation or power generation, heat supply and cold supply, and the trapped pure CO2The device is used for gasifying and reforming fuel or storing, transporting, utilizing and sealing;
combined cycle power generation and polygeneration unit for converting H using fuel cell, gas-steam turbine combined cycle, low pressure steam heat exchanger, absorption chiller2Or the chemical energy of the clean fuel gas is efficiently converted into electric power, heat energy and cold energy;
the chemical looping gasification reforming unit is connected with the gas treatment and purification unit, the gas treatment and purification unit is connected with the chemical looping hydrogen production unit, the combined cycle power generation and poly-generation unit, and the chemical looping hydrogen production unit is connected with the combined cycle power generation and poly-generation unit.
Further, the chemical looping gasification reforming unit comprises a gasification reforming reactor and an air reactor which are connected with each other.
The gas treatment and purification unit comprises a fuel gas heat recycling device, a dust removal device, a purification device, an oxygen-deficient air heat recycling device, a purification device and a dust removal device, wherein the fuel gas heat recycling device is connected with the fuel gas dust removal device; the oxygen-poor air heat recycling device is connected with the oxygen-poor air purifying device, and the oxygen-poor air purifying device is connected with the oxygen-poor air dedusting device.
Furthermore, the chemical looping hydrogen production unit comprises a fuel reactor and CO2Gas heat recycling device, condenser, steam reactor and H2Sensible heat recovery device, wherein a fuel reactor is interconnected with a steam reactor, and a fuel reactor outlet is connected with CO2Gas heat recovery and utilization device connection, CO2The gas heat recycling device is connected with the condenser, the outlet of the water vapor reactor is connected with the H2The sensible heat recovery device is connected.
The combined cycle power generation and poly-generation unit comprises a fuel cell, a fuel cell tail gas heat recovery device, a gas turbine, a waste heat boiler, a steam turbine system, a low-pressure steam heat exchanger and an absorption refrigeration device, the fuel cell is connected with a fuel cell tail gas heat recovery device, the fuel cell is simultaneously connected with a combustion chamber of a gas turbine, the gas turbine is connected with a waste heat boiler, the waste heat boiler is connected with a steam utilization unit or a steam generation unit of a chemical chain gasification reforming unit, a gas treatment purification unit and a chemical chain hydrogen production unit, the waste heat boiler is simultaneously connected with a steam turbine and a flue gas condenser, the steam turbine is connected with a generator, a condenser, a low-pressure steam heat exchanger and a heat supply steam heat exchanger, the condenser is connected with a condensate pump and a circulating cooling water system, the condensate pump is connected with the waste heat boiler, and the low-pressure steam heat exchanger is connected with an absorption type refrigerating device.
The utility model has the advantages of that:
1. compared with the traditional gasification/reforming hydrogen production method, the utility model does not need to be provided with a deep cooling air separation oxygen production device, a water gas shift device and a CO2A trapping device capable of remarkably reducing hydrogen productionAnd CO2And (5) capturing the investment of the system.
2. Compared with the traditional method for producing hydrogen by gasification/reforming, the utility model does not need pure oxygen in the gasification or reforming unit, thereby avoiding a great deal of energy consumption caused by cryogenic air separation oxygen production; simultaneously, the utility model discloses need not to adopt special CO such as physical absorption, chemical absorption or membrane separation2A trapping device also greatly avoids CO2Energy consumption for trapping.
3. Compared with the traditional gasification/reforming hydrogen production method, the gasification reforming reactor can be carried out at normal pressure and medium and high temperature, so that the problems caused by the operation of a high-temperature and high-pressure system can be avoided, and the investment can be further reduced.
4. Compared with the traditional hydrogen production method by gasifying and reforming fuel, the chemical-looping hydrogen production method of the utility model avoids the use of expensive water gas shift reaction catalyst with environmental harmfulness, reduces the hydrogen production cost and the environmental pollution, and has the advantages of directly preparing high-purity H2The advantages of (1).
5. The utility model discloses a step rational utilization of energy realizes the energy efficiency maximize. The high-quality fuel gas adopts a fuel cell and an advanced gas turbine to greatly improve the overall efficiency; the heat of the high-temperature gas of each unit of the system is transferred to high-temperature steam through a heat exchanger and is used for generating electricity by a steam turbine; the combustion chamber of the gas turbine receives the nitrogen-rich and oxygen-poor air from the gas treatment and purification system and the fuel cell, and can reduce NO in the combustion processxPollutants are generated and the power generation capacity of the gas turbine is increased; the low-grade heat in the system supplies heat and cold to users through the heat exchanger and the absorption refrigeration device.
6. The utility model discloses can provide the diversified products such as hydrogen, electricity, heat, cold, can adjust system flow and each product proportion in a flexible way, can satisfy the diversified demands of users such as chemical industry, traffic, electric power, heating, refrigeration.
Drawings
Fig. 1 gives an overall view of the system:
chemical looping gasification reforming unit a: a1, a gasification reforming reactor; a2, air reactor;
gas treatment purification unit B: b1, fuel gas heat exchanger; b2, a fuel gas dust remover; b3, fuel purifier; b4, oxygen-poor flue gas heat exchanger; b5, oxygen-depleted flue gas purifier; b6, an oxygen-deficient flue gas dust remover;
and (3) a chemical looping hydrogen production unit C: c1, fuel reactor; c2, CO2A flue gas heat exchanger; c3, CO2A flue gas condenser; c4, steam reactor; c5, H2A heat exchanger;
combined cycle power generation and poly-generation unit D: d1: a fuel cell; d2, fuel cell tail gas heat exchanger; d3, fuel cell tail gas condenser; d4, Fuel cell N2A heat exchanger; d5, gas turbine compressor; d6, gas turbine combustor; d7, gas turbine; d8, gas turbine generator; d9, waste heat boiler; d10, a waste heat boiler tail gas condenser; d11, steam turbine; d12, steam turbine generator; d13, a condenser; d14, condensate pump; d15, cooling tower; d16, a circulating water pump; d17, low pressure steam heat exchanger; d18, absorption chiller; d19, heating steam heat exchanger.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to FIG. 1, a coupled chemical looping reaction and CO2The system comprises a chemical chain gasification reforming unit A, a gas treatment purification unit B, a chemical chain hydrogen production unit C and a combined cycle power generation and poly-generation unit D, wherein the chemical chain gasification reforming unit A is connected with the gas treatment purification unit B, the gas treatment purification unit B is connected with the chemical chain hydrogen production unit C, the combined cycle power generation and poly-generation unit D, and the chemical chain hydrogen production unit C is connected with the combined cycle power generation and poly-generation unit D;
in the fuel gasification reforming reactor A1, a carbonaceous fuel and a metal compound such as Fe2O3Chemical reaction at high temperature of about 500-2O3Oxidizing part of C element in the carbon-containing fuel to generate CO and release heat, Fe2O3Is reduced to contain Fe3O4And low valence compounds of FeO, Fe, etc. The gasification reforming reactant H is fed into the fuel gasification reforming reactor A12O (high temperature steam S from waste heat boiler D91) Or CO2(part or all of the pure CO from the chemical looping hydrogen production unit C2) And the conversion of the carbon-containing fuel is promoted. Part of C element and H in carbon-containing fuel2O reacts to generate CO and H2(formula (1)); part of the C element being present with CO2The reaction takes place to form CO (formula (2)). The CO produced can further react with H2Reaction of O to CO2And H2(equation (3)). When a fuel such as coal, biomass, oil, or organic solid waste is used, CH is also generated by decomposition of the fuel at high temperature4Equal volatiles and coke (equation (4)). Ideally, by adjusting Fe2O3、H2O、CO2In such an amount that the C element of the carbonaceous fuel is totally converted into the gas phase product of the gasification reforming reactor and the CO/CO ratio is kept high2Volume ratio (e.g. of>3). Gasification reforming reactor producing hydrogen containing2、CO、CH4、CO2The high-temperature fuel gas with equal components is sent to a gas treatment purification unit B; the resulting solid phase products (e.g., ash and small amounts of incompletely reacted coke) and reduced valence compounds enter the air reactor a 2. Introducing air into the air reactor A2, oxidizing the low-valence compounds by oxygen in the air at about 800-1000 ℃ to regenerate Fe2O3Which is returned to the gasification reforming reactor A1 for recycling, Fe2O3The high temperature sensible heat carried along can provide heat for the gasification reforming reactor. In the air reactor a2, oxygen of the air is consumed and the resulting high temperature oxygen-depleted air is sent to the gas treatment purification unit B.
C+H2O＝CO+H2 (1)
C+CO2＝2CO (2)
CO+H2O＝CO2+H2 (3)
H fuel2+CO+CH4+CO2+ char + other gases and volatiles (4)
In the gas treatment purification unit B, the high temperature fuel gas is cooled to 400 ℃ or below in the fuel gas heat exchanger B1, and the released heat is generated by the saturated water S from the waste heat boiler D92Absorption of this heat with the formation of high-temperature saturated water vapor S2’Is sent back to the waste heat boiler D9. The cooled fuel gas is then subjected to cyclone separation and filtration in a fuel gas dust separator B2 to remove solid particles from the fuel gas. The resultant dust-free fuel gas is passed through a fuel gas purifier B3, and H in the fuel gas is purified by a purifier such as CLAUS desulfurizer contained in the purifier2And S and other gases with environmental pollution are removed. The obtained clean fuel gas then enters a chemical looping hydrogen production unit C, and part of the fuel gas can also be directly sent to a fuel gas power generation unit (such as a fuel cell D1 and a gas turbine D6) of the combined cycle power generation and poly-generation unit D. At the same time, the high temperature oxygen-depleted air is cooled to below 400 ℃ in the oxygen-depleted air heat exchanger B4, and the released heat is transferred by saturated water S from another bypass of the waste heat boiler D93Absorption of this heat with the formation of high-temperature saturated water vapor S3’Is sent back to the waste heat boiler D9. The cooled oxygen-depleted air is then subjected to SCR denitration or the like in an oxygen-depleted air purifier B5 to remove NO possibly contained in the oxygen-depleted airxAnd the like. Finally, the oxygen-poor air passes through an oxygen-poor air dust collector B6, solid particles of the oxygen-poor air are removed by methods of cyclone separation, filtration and the like, and clean oxygen-poor air (the main component is N) is obtained2Containing a small amount of O2) Gas turbine combustor D6 (i) which can be vented and can also be sent to a combined cycle power generation and polygeneration unit D1)。
In the chemical looping hydrogen production unit C, the fuel gas and the metal oxide (such as Fe) are cleaned2O3) Entering a fuel reactor C1, and carrying out oxidation-reduction reaction under the conditions of 700 ℃ and 1000 ℃, and adjusting Fe2O3The amount of CO and H in the fuel gas2、CH4When the combustible gas is completely oxidized, the generated component is CO2And H2High temperature wet CO of O2Gas, andFe2O3is reduced to form FeO and Fe3O4Lower oxides (formulas (5) to (7)). High temperature wet CO2Passing the gas through CO2The flue gas heat exchanger C2 is cooled and the heat released is supplied by saturated water S from the waste heat boiler D94Absorption of this heat with the formation of high-temperature saturated water vapor S4’Is sent back to the waste heat boiler D9. Cooled CO2The flue gas then enters a flue gas condenser C3 to be further cooled to below 100 ℃, and the released heat is obtained by low-temperature unsaturated water S from a waste heat boiler5Absorption of heat with formation of high temperature unsaturated water S5’Condensed water n sent back to the waste heat boiler D9 and the flue gas condenser C31The recycled water is sent to a circulating cooling water system (before a circulating water pump D16) of the combined cycle power generation and poly-generation unit D for recycling. The flue gas obtained from the outlet of the flue gas condenser C3 is pure CO2Facilitating subsequent transportation and storage, and partial CO2Gas (g)1) Is sent to the gasification reforming reactor a1 of the gasification reforming unit a for promoting the conversion of the carbonaceous fuel. The low oxides from the fuel reactor C1 are fed to the steam reactor C4 and steam (optionally superheated steam S from a waste heat boiler)6) The redox reaction takes place at the temperature of 500 ℃ and 700 ℃. Wherein the lower oxides are oxidized to regenerate higher oxides (Fe)2O3) And pure H is generated2(equations (8) and (9)). The higher oxides are sent to fuel reactor C1 for recycle. High temperature H2Cooled to below 200 ℃ by a hydrogen heat exchanger C5, the heat released being supplied by saturated water S from a waste heat boiler D97Absorption of this heat with the formation of high-temperature water vapor S7’Is sent back to the waste heat boiler D9, and the obtained pure H2Can be sent to chemical synthesis users, transportation users and the like to provide product hydrogen, and the rest H2The fuel cell D1 or the gas turbine combustor D6 that may be sent to the combined cycle power generation and polygeneration unit D to generate power.
CO+Fe2O3＝CO2+2FeO (5)
H2+Fe2O3＝H2O+2FeO (6)
CH4+12Fe2O3＝CO2+2H2O+8Fe3O4 (7)
2FeO+H2O＝Fe2O3+H2 (8)
2Fe3O4+H2O＝3Fe2O3+H2 (9)
H produced by chemical looping hydrogen production unit C in combined cycle power generation and polygeneration unit D2Entering the fuel cell D1, the oxygen in the air reacts with H in the fuel cell D12An electrochemical reaction occurs, generating electricity and producing water. Under certain embodiments, the clean syngas from gas treatment purification unit B also enters fuel cell D1, producing electricity and generating CO-containing gas2And high temperature tail gas (400-8Absorption of this heat with the formation of high temperature water (steam) S8’Is sent back to the waste heat boiler D9 for use. The cooled tail gas can enter a tail gas condenser D3 to be cooled to below 100 ℃, and condensed water n of the tail gas condenser D32The recycled water is sent to a circulating cooling water system (before a circulating water pump D16) of the combined cycle power generation and poly-generation unit D for recycling. The obtained dry tail gas is pure CO2Convenient for subsequent transportation and sealing storage, and partially pure CO2(g2) Or to the gasification reforming reactor a1 of the gasification reforming unit a for promoting the conversion of the carbonaceous fuel. After oxygen in the air was consumed in the fuel cell D1, the air became N2A gas as a main component, the gas passing through N2The heat exchanger D4 is cooled to below 200 deg.C, and the released heat is generated by water S from waste heat boiler D99Absorption of this heat with the formation of high temperature water (steam) S9’Is sent back to the waste heat boiler D9 for use. Cooling N2Can be directly exhausted to the atmosphere, part N2(i2) May be delivered to the gas turbine combustor D6.
Generating power in a combined cycleAnd a polygeneration unit D, air is compressed by a gas turbine compressor D5 to increase temperature and pressure, and the compressed air enters a gas turbine combustor D6, where it undergoes a combustion reaction with clean syngas from the gas treatment purification unit B (and in some embodiments also with H from the chemical looping hydrogen production unit C)2Combustion reactions occur) to produce high temperature flue gases that may be above 1000 ℃. The gas turbine combustor D6 is fed with oxygen-depleted air (i) from the gas treatment purification unit B1) And cooling N from fuel cell D12(i2) Can reduce NO as pollutant gas in the combustion processxTo increase the gas flow rate. High-temperature flue gas generated by the gas turbine combustor D6 enters the gas turbine D7, the temperature and pressure of the flue gas are reduced, the volume of the flue gas is increased, the gas turbine D7 is pushed to rotate to do work, and the gas turbine generator D8 outputs electric power. The high-temperature flue gas at the outlet of the gas turbine D8 is cooled by the waste heat boiler D9, and the released heat is recovered from the unsaturated water of the waste heat boiler D9 and high-temperature steam is generated. When the gas turbine fuel is H2When the flue gas is cooled by the waste heat boiler D9, the temperature of the flue gas is further reduced by the flue gas condenser D10, and condensed water n3The flue gas is sent to a circulating cooling water system (before a circulating water pump D16) of the combined cycle power generation and poly-generation unit D for recycling, and the main component of the flue gas discharged to the atmosphere is N2Without CO generation2And (5) discharging.
In the combined cycle power generation and poly-generation unit D, the waste heat boiler D9 absorbs the heat of the high-temperature flue gas at the outlet of the gas turbine D7 and also absorbs the heat (S) from the gas purification treatment unit B, the chemical chain hydrogen production unit C and the fuel cell D12’,S3’,S4’,S5’,S7’,S8’,S9’) And recycling is carried out. Part of the steam generated by the waste heat boiler D9 enters a fuel gasification reforming reactor A1 (S)1) Steam reactor C4 (S)6) Taking part in the reaction. High-temperature steam generated by the waste heat boiler D9 enters the steam turbine D11, and pushes the steam turbine D11 to rotate to do work through volume expansion, so that the steam turbine generator D12 outputs electric power. The temperature and pressure of the high-temperature water vapor are gradually reduced in the expansion process, and the steamThe low-pressure steam at the outlet of the turbine D11 enters a condenser D13 for cooling, the heat released in the cooling process is absorbed by circulating cooling water conveyed by a circulating water pump D16, and the condensed water at the outlet of the condenser D13 enters a condensed water pump D14 for pressurization and then enters a waste heat boiler D9 for absorbing heat. During the expansion process of the steam turbine D11, the high-temperature steam of the waste heat boiler D9 can be extracted to enter the low-pressure steam heat exchanger D17 to cool and release heat, and the released heat can be transferred to the lithium bromide absorption refrigeration device D18 through water to supply cold to users. The lower pressure steam from the steam turbine D11 may also be extracted to the heating steam heat exchanger D19 for cooling, and the heat released may be used to heat a user by heating the water. The low-pressure water (steam) cooled by the low-pressure steam heat exchanger D17 and the heating steam heat exchanger D18 can be sent to the condenser D13 along with the exhaust steam of the steam turbine D11 for further cooling. The circulating cooling water absorbing heat from the condenser D13 transfers the heat to the atmosphere environment through the cooling tower D15, and the cooled circulating cooling water and the circulating cooling water come from the chemical-looping hydrogen production unit C (n)1) Fuel cell tail gas (n)2) And condensed water (n) of waste heat boiler flue gas3) Mixing, and then sending into a condenser D13 through a circulating water pump D16.
Generally, the utility model provides a hydrogen electric heating cold poly-generation system to can obtain the high-purity CO who is fit for transporting and sealing up2A gas.
Coupling chemical chain reaction and CO2In the method, the oxidation-reduction reaction of the fuel and metallic compounds is continuously converted into fuel gas containing combustible components in a fuel gasification reforming unit of the carbon-containing fuel, the metallic compounds are oxidized, regenerated and recycled by utilizing air, and the reacted air is changed into nitrogen-rich oxygen-poor air;
the fuel gas and the oxygen-poor air pass through a gas treatment purification unit, the high-temperature heat of the gas is recycled, pollutants such as dust, sulfur, nitrogen and the like are removed, and clean fuel gas and clean oxygen-poor air are generated;
fuel of clean fuel gas in chemical looping hydrogen production unitIn the reactor, the carbon dioxide is continuously converted into CO by oxidation-reduction reaction with metal oxide2And H2High temperature flue gas of O; the reduced metal oxide enters a steam reactor to be oxidized by steam to generate pure H2And realizes the regeneration and the cyclic utilization of the metal oxide. Containing CO2And H2The high-temperature flue gas of O is subjected to heat recovery and condensation to remove H2Separating O from the gas mixture to obtain pure CO2Facilitating subsequent CO2And (4) transporting and sealing. Pure H2After heat recovery, the obtained product is used for chemical synthesis and transportation, or is sent to a fuel cell and a combined cycle system for power generation, heat supply and cold supply;
H2or part of clean synthesis gas is in a fuel cell or combined cycle system, the chemical energy of the fuel is converted into electric energy by using the fuel cell or the gas turbine, the heat of the high-temperature tail gas of the fuel cell and the gas turbine is recovered by a heat absorbing medium of a waste heat boiler, and the waste heat of the gas treatment and purification unit and the chemical-looping hydrogen production unit is also collected by the waste heat boiler. And high-temperature steam generated by the waste heat boiler enters a steam turbine to generate power. The low-pressure extraction steam of the steam turbine is used for supplying heat to users, and part of the low-pressure extraction steam of the steam turbine is also used for supplying low-grade heat to the absorption refrigeration device, so that the cooling of the users is realized.
It should be noted that the above-mentioned embodiment is not the only implementation method of the present invention, and other embodiments that are easily extended by a person skilled in the relevant art according to the embodiment are also within the scope of the present invention.
Claims (5)
1. Coupling chemical chain reaction and CO2The high-efficiency low-energy-consumption hydrogen electric heating cold poly-generation system for separation and trapping is characterized by comprising a chemical-looping gasification reforming unit, a gas treatment purification unit, a chemical-looping hydrogen production unit and a combined cycle power generation and poly-generation unit, wherein,
the chemical-looping gasification reforming unit is used for carrying out oxidation-reduction reaction on the carbon-containing fuel and the solid oxygen carrier under the action of a gasification agent or a reforming agent so as to convert the carbon-containing fuel into high-quality fuel gas;
the gas treatment and purification unit is used for carrying out heat recycling, dust removal and purification on the fuel gas obtained by gasification and reforming and the oxygen-deficient air of the oxygen carrier regeneration device to obtain clean fuel gas and clean oxygen-deficient air;
a chemical chain hydrogen production unit which converts hydrogen elements in water vapor into high-purity H based on the cyclic oxidation-reduction reaction of a metal oxygen carrier2Oxidation of clean fuel gas to produce high purity CO2Simultaneously realizes the preparation of high-purity H2And CO2Trapping, the prepared pure hydrogen is used for chemical synthesis, transportation or power generation, heat supply and cold supply, and the trapped pure CO2The device is used for gasifying and reforming fuel or storing, transporting, utilizing and sealing;
combined cycle power generation and polygeneration unit for converting H using fuel cell, gas-steam turbine combined cycle, low pressure steam heat exchanger, absorption chiller2Or the chemical energy of the clean fuel gas is efficiently converted into electric power, heat energy and cold energy;
the chemical looping gasification reforming unit is connected with the gas treatment and purification unit, the gas treatment and purification unit is connected with the chemical looping hydrogen production unit, the combined cycle power generation and poly-generation unit, and the chemical looping hydrogen production unit is connected with the combined cycle power generation and poly-generation unit.
2. The coupled chemical looping reaction and CO of claim 12The high-efficiency low-energy-consumption hydrogen electricity heat-cold poly-generation system for separation and trapping is characterized in that the chemical-looping gasification reforming unit comprises a gasification reforming reactor and an air reactor which are connected with each other.
3. Coupling chemical looping reaction and CO according to claim 1 or 22The high-efficiency low-energy-consumption hydrogen electric heating cold poly-generation system for separation and trapping is characterized in that the gas treatment and purification unit comprises a fuel gas heat recycling device, a dust removal device, a purification device, and an oxygen-deficient air heat recycling device, a purification device and a dust removal device, wherein the fuel gas heat recycling device is connected with the fuel gas dust removal device, and the fuel gas removesThe dust device is connected with the fuel gas purification device; the oxygen-poor air heat recycling device is connected with the oxygen-poor air purifying device, and the oxygen-poor air purifying device is connected with the oxygen-poor air dedusting device.
4. The coupled chemical looping reaction and CO of claim 12The high-efficiency low-energy-consumption hydrogen electric heating cold poly-generation system for separation and capture is characterized in that the chemical-looping hydrogen production unit comprises a fuel reactor and CO2Gas heat recycling device, condenser, steam reactor and H2Sensible heat recovery device, wherein a fuel reactor is interconnected with a steam reactor, and a fuel reactor outlet is connected with CO2Gas heat recovery and utilization device connection, CO2The gas heat recycling device is connected with the condenser, the outlet of the water vapor reactor is connected with the H2The sensible heat recovery device is connected.
5. Coupling chemical looping reaction and CO according to claim 1 or 22The high-efficiency low-energy-consumption hydrogen-electricity-heat-cold-poly-generation system with separation and collection is characterized in that the combined cycle power generation and poly-generation unit comprises a fuel cell, a fuel cell tail gas heat recovery device, a gas turbine, a waste heat boiler, a steam turbine system, a low-pressure steam heat exchanger and an absorption refrigerating device, wherein the fuel cell is connected with the fuel cell tail gas heat recovery device, the fuel cell is simultaneously connected with a combustion chamber of the gas turbine, the gas turbine is connected with the waste heat boiler, the waste heat boiler is connected with a steam-using or steam-producing unit of a chemical-looping gasification reforming unit, a gas treatment and purification unit and a chemical-looping hydrogen production unit, the waste heat boiler is simultaneously connected with the steam turbine and a flue gas condenser, the steam turbine is connected with a power generator, a condenser, the low-pressure steam heat exchanger and a heat exchanger, and the condenser is connected with a condensate pump and a circulating cooling water system, the condensate pump is connected with the waste heat boiler, and the low-pressure steam heat exchanger is connected with the absorption type refrigerating device.
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| CN112408324B (en) * | 2020-11-12 | 2024-09-20 | 浙江工业大学 | Coupled chemical chain reaction and CO2Efficient low-energy-consumption hydrogen-electric heating-cooling poly-generation system and method for separation and trapping |
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