Combined heat, power and hydrogen supply system based on chemical looping technology

Abstract

The combined heat, power and hydrogen supply system based on the chemical looping technology comprises an air separation system, a gas turbine system, a methane supply system and a chemical looping hydrogen production system. Nitrogen and oxygen-enriched gas separated by the air separation system are input into the oxygen carrier lifter and the air oxidation reactor, the methane supply system inputs methane into the gas turbine system and the reduction reactor, and water vapor generated by the gas turbine system is input into the reduction reactor and the hydrogen production reactor. Condensate water generated by the reduction reactor and the hydrogen production reactor is respectively input into the gas turbine system; a gas outlet of the air oxidation reactor is connected with the gas turbine system, an oxygen carrier outlet is connected with the reduction reactor and the combustion reactor, the reduction reactor is connected with the oxygen carrier lifter, and the oxygen carrier lifter is connected with the air oxidation reactor; the reduction reactor is connected with the hydrogen separator, and the hydrogen separator is connected with the combustion reactor; the combustion reactor is connected with the hydrogen production reactor, and the hydrogen production reactor is connected with the oxygen carrier lifter. And synchronization of power generation and hydrogen production can be realized.

Description

Technical Field

[0001] The present invention relates to the field of combined heat and power hydrogen production, and in particular to a combined heat and power hydrogen production system based on chemical looping technology. Background Art

[0002] In the field of energy supply, cogeneration systems have long occupied an important position. Traditional cogeneration systems are mainly committed to meeting thermal energy needs while generating electricity. After the steam turbine works, part or all of the steam is output to heat users, effectively reducing exhaust losses and greatly improving energy utilization efficiency. However, with the transformation of energy demand structure and the urgent need for clean energy utilization, the limitations of cogeneration systems have gradually become apparent.

[0003] In recent years, hydrogen has garnered widespread attention as a clean, efficient, and highly promising secondary energy source. Integrating hydrogen production into energy supply systems, achieving combined heat, power, and hydrogen generation, has become a new research direction in the energy field. However, existing combined heat, power, and hydrogen generation technologies have significant shortcomings, including the inability to simultaneously generate electricity and produce hydrogen. Summary of the Invention

[0004] The object of the present invention is to provide a heat-electricity-hydrogen cogeneration system based on chemical looping technology, which can produce hydrogen while generating electricity.

[0005] The embodiment of the present invention is achieved as follows: In a first aspect, the present application discloses a system for combined heat, power and hydrogen production based on chemical looping technology, comprising: an air separation system, a gas turbine system, a methane supply system and a chemical looping hydrogen production system; the air separation system is used to separate input air into nitrogen and oxygen-rich gas, and the gas turbine system is connected to the methane supply system; The chemical loop hydrogen production system includes: an air oxidation reactor, a reduction reactor, an oxygen carrier lifter, a hydrogen production reactor, a combustion reactor and a hydrogen separator; The nitrogen and oxygen-rich gas separated by the air separation system are respectively input to the oxygen carrier lifter and the air oxidation reactor; the methane supply system is used to input methane to the gas turbine system and the reduction reactor; the water vapor generated by the gas turbine system is input to the reduction reactor and the hydrogen production reactor; and the condensed water generated by the reduction reactor and the hydrogen production reactor is respectively input to the gas turbine system; The gas outlet of the air oxidation reactor is connected to the gas turbine system, the oxygen carrier outlet is connected to the first inlet of the reduction reactor and the combustion reactor respectively, the oxygen carrier outlet of the reduction reactor is connected to the oxygen carrier lifter, and the oxygen carrier lifter is connected to the oxygen carrier inlet of the air oxidation reactor; the gas outlet of the reduction reactor is connected to the hydrogen separator, and the exhaust gas outlet of the hydrogen separator is connected to the second inlet of the combustion reactor; the oxygen carrier outlet of the combustion reactor is connected to the hydrogen production reactor, and the oxygen carrier outlet of the hydrogen production reactor is connected to the oxygen carrier lifter.

[0006] In a possible implementation, the system further includes: a first water vapor adsorption device, wherein the inlet of the first water vapor adsorption device is connected to the gas outlet of the reduction reactor, the gas outlet is connected to the hydrogen separator, and the liquid outlet is connected to the gas turbine system; a second water vapor adsorption device, wherein the second water vapor adsorption device is connected to the gas outlet of the hydrogen production reactor, and the liquid outlet is connected to the gas turbine system; A third water vapor adsorption device is connected to the gas outlet of the combustion reactor, and a liquid outlet is connected to the gas turbine system. A carbon dioxide capture device is connected to the gas outlet of the third water vapor adsorption device. In a possible embodiment, the gas turbine system includes: a generator, the generator being connected to the gas outlet of the air oxidation reactor and the methane supply system respectively; A waste heat boiler is connected to the generator, and the inlet of the waste heat boiler is also connected to the liquid outlets of the first water vapor adsorption device, the second water vapor adsorption device, and the third water vapor adsorption device, respectively; the gas outlet of the waste heat boiler is connected to the reduction reactor and the hydrogen production reactor, respectively. In a second aspect, the present application also discloses a system for combined heat, power and hydrogen production based on chemical looping technology, the system comprising: an air separation system, a gas turbine system, a methane supply system and a chemical looping hydrogen production system; the air separation system is used to separate input air into nitrogen and oxygen-rich gas, and the gas turbine system is connected to the methane supply system; The chemical loop hydrogen production system includes: an air oxidation reactor, a reduction reactor, an oxygen carrier lifter, a hydrogen production reactor and a hydrogen separator; The nitrogen and oxygen-rich gas separated by the air separation system are respectively input to the oxygen carrier lifter and the air oxidation reactor; the methane supply system is used to input methane to the gas turbine system and the reduction reactor; the water vapor generated by the gas turbine system is input to the reduction reactor and the hydrogen production reactor; and the condensed water generated by the reduction reactor and the hydrogen production reactor is respectively input to the gas turbine system; The gas outlet of the air oxidation reactor is connected to the gas turbine system, and the oxygen carrier outlet is connected to the first inlet of the reduction reactor; the oxygen carrier outlet of the reduction reactor is connected to the hydrogen production reactor, and the oxygen carrier outlet of the hydrogen production reactor is connected to the oxygen carrier lifter, and the oxygen carrier lifter is connected to the oxygen carrier inlet of the air oxidation reactor; the gas outlet of the reduction reactor is connected to the hydrogen separator, and the exhaust gas outlet of the hydrogen separator is connected to the second inlet of the reduction reactor. In a possible implementation, the system further includes: a first water vapor adsorption device, wherein the inlet of the first water vapor adsorption device is connected to the gas outlet of the reduction reactor, the gas outlet is connected to the hydrogen separator, and the liquid outlet is connected to the gas turbine system; a second water vapor adsorption device, wherein the second water vapor adsorption device is connected to the gas outlet of the hydrogen production reactor, and the liquid outlet is connected to the gas turbine system; A carbon dioxide capture device is connected to the gas outlet of the first water vapor adsorption device. In a possible embodiment, the gas turbine system includes: a generator, the generator being connected to the gas outlet of the air oxidation reactor and the methane supply system respectively; A waste heat boiler is connected to the generator, and the inlet of the waste heat boiler is also connected to the liquid outlets of the first water vapor adsorption device and the second water vapor adsorption device respectively, and the gas outlet of the waste heat boiler is connected to the reduction reactor and the hydrogen production reactor respectively.

[0007] In a third aspect, the present application also discloses a system for combined heat, power and hydrogen production based on chemical looping technology, comprising: an air separation system, a gas turbine system, a methane supply system and a chemical looping hydrogen production system; the air separation system is used to separate input air into nitrogen and oxygen-rich gas, and the gas turbine system is connected to the methane supply system; The chemical loop hydrogen production system includes: an air oxidation reactor, an oxygen carrier lifter, a hydrogen production reactor, a combustion reactor and a hydrogen separator; The nitrogen and oxygen-rich gas separated by the air separation system are respectively input to the oxygen carrier riser and the air oxidation reactor; the methane supply system is used to input methane to the gas turbine system and the combustion reactor; the water vapor generated by the gas turbine system is input to the hydrogen production reactor; and the condensed water generated by the hydrogen production reactor and the combustion reactor is input to the gas turbine system; The gas outlet of the air oxidation reactor is connected to the gas turbine system, the oxygen carrier outlet is connected to the inlet of the combustion reactor, the oxygen carrier outlet of the combustion reactor is connected to the hydrogen production reactor, the oxygen carrier outlet of the hydrogen production reactor is connected to the oxygen carrier riser, and the oxygen carrier riser is connected to the oxygen carrier inlet of the air oxidation reactor.

[0008] In a possible implementation, the system further includes: a first water vapor adsorption device, wherein the inlet of the first water vapor adsorption device is connected to the gas outlet of the hydrogen production reactor, and the liquid outlet is connected to the gas turbine system; a second water vapor adsorption device, wherein the second water vapor adsorption device is connected to the gas outlet of the combustion reactor and the liquid outlet is connected to the gas turbine system; A carbon dioxide capture device is connected to the gas outlet of the second water vapor adsorption device.

[0009] In a possible embodiment, the gas turbine system includes: a generator, the generator being connected to the gas outlet of the air oxidation reactor and the methane supply system respectively; A waste heat boiler is connected to the generator, and the inlet of the waste heat boiler is also connected to the liquid outlets of the first water vapor adsorption device and the second water vapor adsorption device respectively, and the gas outlet of the waste heat boiler is connected to the hydrogen production reactor.

[0010] In a possible implementation, the chemical chaining hydrogen production system further includes a regeneration storage tank; the regeneration storage tank is connected to the oxygen carrier lifter and the air oxidation reactor respectively.

[0011] The beneficial effects of the embodiments of the present invention are: (1) The air separation system, chemical looping system, and gas turbine system are connected in series, using methane and water as raw materials to simultaneously produce hydrogen, power, and heat. This achieves the cascade utilization of high and low-level thermal energy, the rational application of nitrogen and oxygen separated from air, reduces the energy consumption of the chemical looping hydrogen production system at lower temperatures, improves the oxygen carrier oxidation efficiency, and reduces nitrogen oxide emissions from gas turbine flue gas. At the same time, the water generated by the recycling system is used to supply hydrogen to the chemical looping hydrogen production system.

[0012] (2) The temperature of the entire chemical chaining system is 500 to 800°C, and at this lower temperature, the step-by-step utilization of energy and materials is achieved. In addition, the N2 gas and oxygen-rich gas separated by the air separation system are fully utilized, and the separated gases are respectively used by different equipment in the chemical chaining hydrogen production system. The N2 separated by the air separation system is used as oxygen carrier lifting gas and protective gas for the chemical chaining hydrogen production system. The separated oxygen-rich gas has a high oxygen content and can react with the oxygen carrier of the air oxidation reactor. The oxygen content of the discharged gas is controllable and can be used for gas turbine power generation.

[0013] (3) Improve the energy efficiency of the air oxidation reactor. N2 does not participate in the reaction but absorbs heat. Reducing the N2 content means reducing the heat consumption of the air oxidation reactor.

[0014] (4) Improve the oxidation efficiency of the air oxidation reactor. The high O2 partial pressure makes the oxidation efficiency higher than that of air.

[0015] (5) Efficiently recycle the superheated steam produced by the waste heat boiler of the gas generator to supply the chemical chain hydrogen production reaction.

[0016] (6) Reduce NOx emissions from gas turbine flue gas. The oxygen content of the oxygen-enriched gas is controllable. When the oxygen content is very high, CO2 collected from the chemical loop system is mixed with the oxygen-enriched gas to reduce the NOx content in the flue gas while meeting the requirements of combustion power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a system diagram of a first embodiment of a heat-electricity-hydrogen cogeneration system based on chemical looping technology according to an embodiment of the present invention; Figure 2 This is a system diagram of a second embodiment of a heat-electricity-hydrogen cogeneration system based on chemical looping technology according to an embodiment of the present invention; Figure 3 This is a system diagram of a third embodiment of a heat-electricity-hydrogen cogeneration system based on chemical looping technology according to an embodiment of the present invention.

[0019] Icons: 1. Air oxidation reactor; 2. Reduction reactor; 3. Oxygen carrier lifter; 4. Hydrogen production reactor; 5. Combustion reactor; 6. Hydrogen separator; 7. First water vapor adsorption device; 8. Second water vapor adsorption device; 9. Third water vapor adsorption device; 10. Generator; 11. Waste heat boiler; 12. Regeneration storage tank; 13. Carbon dioxide separator. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] The cogeneration system for heat, power, and hydrogen based on chemical looping technology in this application utilizes an air separation system, a chemical looping system, and a gas turbine system in series, using methane and water as feedstocks to simultaneously produce hydrogen, power, and heat. This system achieves cascaded utilization of high- and low-level thermal energy, rationally applying nitrogen and oxygen separated from air, reducing system energy consumption for chemical looping hydrogen production at lower temperatures, improving oxygen carrier oxidation efficiency, and reducing nitrogen oxide emissions from gas turbine flue gas. The water generated by the system is recycled to supply hydrogen to the chemical looping hydrogen production system.

[0027] First embodiment refer to Figure 1 The heat-power-hydrogen cogeneration system based on chemical looping technology in this embodiment includes three systems: an air separation system, a chemical looping hydrogen production system, and a gas turbine.

[0028] The air separation system uses pressure swing adsorption and cryogenic methods to separate air into high-purity nitrogen and oxygen-rich gas. The nitrogen outlet is connected to the oxygen carrier lift equipment, which is used to lift oxygen carriers in the chemical looping hydrogen production system and for other process steps such as valves. The oxygen-rich gas outlet is connected to air oxidation reactor 1, which supplies the air oxidation reaction in the chemical looping hydrogen production system.

[0029] The chemical looping hydrogen production system includes an air oxidation reactor 1, a reduction reactor 2, a hydrogen PSA purification unit, a combustion reactor 5, a hydrogen production reactor 4, and a CO2 capture unit. The oxygen carrier lifting equipment is connected to the N2 outlet of the air separation unit. The oxygen inlet of the air oxidation reactor 1 is connected to the oxygen-enriched gas outlet of the air separation unit. The gas outlet of the air oxidation reactor 1 is connected to a generator 10. The steam inlet of the reduction reactor 2 and the hydrogen production reactor 4 is connected to the superheated steam outlet of the waste heat boiler 11. The condensate outlet of the pre-treatment cooling equipment of the hydrogen PSA purification unit and the condensate outlet of the gas outlet cooling equipment of the combustion reactor 5 are connected to the inlet of the waste heat boiler 11. The gas outlet of the gas outlet cooling equipment of the combustion reactor 5 is connected to the CO2 capture unit.

[0030] Air oxidation reactor 1 uses oxygen-rich gas obtained from the air separation system to perform an oxidation reaction. The oxygen content of the reaction exhaust is controllable, either below or above the oxygen content of air. This gas is then purified and fed to generator 10 for combustion support. The highly oxidized oxygen carriers produced by air oxidation enter reduction reactor 2 and combustion reactor 5, respectively. The gases produced by the reaction of CH4, water vapor, and the oxygen carriers in reduction reactor 2 are purified by hydrogen PSA to separate H2. The purge gas enters combustion reactor 5, where the oxygen carriers are reduced to a low oxidation state. The low-oxidized oxygen carriers then enter hydrogen production reactor 4 and react with H2O to produce hydrogen. The steam required for the reactions in reduction reactor 2 and hydrogen production reactor 4 is generated by waste heat boiler 11 of the gas turbine system. Condensate from the pre-treatment cooling equipment of the hydrogen PSA purification system and the gas outlet cooling equipment of combustion reactor 5 are returned to waste heat boiler 11 for reuse.

[0031] The gas turbine system primarily consists of a generator 10 and a waste heat boiler 11. The generator 10 inlet is connected to the gas outlet of the air oxidation reactor 1. The superheated steam outlet of the waste heat boiler 11 is connected to the steam inlets of the reduction reactor 2 and the hydrogen production reactor 4. The waste heat boiler 11 inlet is connected to the condensate system after heat exchange between the PSA and combustion reactor 5.

[0032] The circulation direction of the oxygen carrier in the entire system is: air oxidation reactor 1 → divided into two routes, the first route oxygen carrier → reduction reactor 2 → oxygen carrier lifter 3, the second route oxygen carrier → combustion reactor 5 → hydrogen production reactor 4 → oxygen carrier lifter 3, and the last two routes oxygen carrier → regeneration tank → air oxidation reactor 1.

[0033] Second embodiment refer to Figure 2 The heat-power-hydrogen cogeneration system based on chemical looping technology in this embodiment includes three systems: an air separation system, a chemical looping hydrogen production system, and a gas turbine.

[0034] The air separation system uses pressure swing adsorption and cryogenic methods to separate air into high-purity nitrogen and oxygen-rich gas. The nitrogen outlet is connected to the oxygen carrier lift equipment, which is used to lift oxygen carriers in the chemical looping hydrogen production system and for other process steps such as valves. The oxygen-rich gas outlet is connected to air oxidation reactor 1, which supplies the air oxidation reaction in the chemical looping hydrogen production system.

[0035] The chemical looping hydrogen production system includes an air oxidation reactor 1, a reduction reactor 2, a hydrogen PSA purification unit, a hydrogen production reactor 4, and a CO2 capture unit. The oxygen carrier lift unit is connected to the N2 outlet of the air separation unit. The oxygen inlet of the air oxidation reactor 1 is connected to the oxygen-enriched gas outlet of the air separation unit. The gas outlet of the air oxidation reactor 1 is connected to a generator 10. The steam inlet of the reduction reactor 2 and the hydrogen production reactor 4 is connected to the superheated steam outlet of a waste heat boiler 11. The condensate outlet of the pre-treatment cooling unit of the hydrogen PSA purification unit is connected to the inlet of the waste heat boiler 11.

[0036] Air oxidation reactor 1 uses oxygen-rich gas obtained from the air separation system to carry out the oxidation reaction. The oxygen content of the reaction exhaust gas can be controlled to be lower or higher than the oxygen content of air. After purification, this gas is fed to generator 10 for combustion support. The highly oxidized oxygen carriers obtained from air oxidation enter reduction reactor 2. The gas produced by the reaction of CH4, water vapor, and oxygen carriers in reduction reactor 2 is purified by hydrogen PSA to separate H2, and the purge gas enters carbon dioxide separator 13. The water vapor required for the reaction between reduction reactor 2 and hydrogen production reactor 4 is generated by the gas turbine system waste heat boiler 11. Condensate from the pre-treatment cooling equipment of the hydrogen PSA purification equipment and the condensate from the gas outlet cooling equipment of combustion reactor 5 are returned to the waste heat boiler 11 for utilization.

[0037] The gas turbine system primarily consists of a generator 10 and a waste heat boiler 11. The generator 10 inlet is connected to the gas outlet of the air oxidation reactor 1. The superheated steam outlet of the waste heat boiler 11 is connected to the steam inlets of the reduction reactor 2 and the hydrogen production reactor 4. The waste heat boiler 11 inlet is connected to the condensate system after heat exchange between the PSA and hydrogen production reactor 5.

[0038] The circulation direction of the oxygen carrier in the entire system is: air oxidation reactor 1 → reduction reactor 2 → hydrogen production reactor 4 → oxygen carrier lifter 3 → regeneration tank → air oxidation reactor 1.

[0039] Third embodiment refer to Figure 3 The heat-power-hydrogen cogeneration system based on chemical looping technology in this embodiment includes three systems: an air separation system, a chemical looping hydrogen production system, and a gas turbine.

[0040] The air separation system uses pressure swing adsorption and cryogenic methods to separate air into high-purity nitrogen and oxygen-rich gas. The nitrogen outlet is connected to the oxygen carrier lift equipment, which is used to lift oxygen carriers in the chemical looping hydrogen production system and for other process steps such as valves. The oxygen-rich gas outlet is connected to air oxidation reactor 1, which supplies the air oxidation reaction in the chemical looping hydrogen production system.

[0041] The chemical looping hydrogen production system includes an air oxidation reactor 1, a hydrogen PSA purification unit, a combustion reactor 5, a hydrogen production reactor 4, and a CO2 capture unit. The oxygen carrier lift unit is connected to the N2 outlet of the air separation unit. The oxygen inlet of the air oxidation reactor 1 is connected to the oxygen-enriched gas outlet of the air separation unit. The gas outlet of the air oxidation reactor 1 is connected to a generator 10. The steam inlet of the hydrogen production reactor 4 is connected to the superheated steam outlet of the waste heat boiler 11. The condensate outlet of the pre-treatment cooling unit of the hydrogen PSA purification unit and the condensate outlet of the gas outlet cooling unit of the combustion reactor 5 are connected to the inlet of the waste heat boiler 11. The gas outlet of the gas outlet cooling unit of the combustion reactor 5 is connected to the CO2 capture unit.

[0042] Air oxidation reactor 1 uses oxygen-rich gas obtained from the air separation system to perform an oxidation reaction. The oxygen content of the reaction exhaust is controllable, either below or above the oxygen content of air. This gas is then purified and fed to generator 10 for combustion support. The highly oxidized oxygen carriers produced by air oxidation enter reduction reactor 2 and combustion reactor 5, respectively. The gases produced by the reaction of CH4, water vapor, and the oxygen carriers in reduction reactor 2 are purified by hydrogen PSA to separate H2. The purge gas enters combustion reactor 5, where the oxygen carriers are reduced to a low oxidation state. The low-oxidized oxygen carriers then enter hydrogen production reactor 4 and react with H2O to produce hydrogen. The steam required for the reactions in reduction reactor 2 and hydrogen production reactor 4 is generated by waste heat boiler 11 of the gas turbine system. Condensate from the pre-treatment cooling equipment of the hydrogen PSA purification system and the gas outlet cooling equipment of combustion reactor 5 are returned to waste heat boiler 11 for reuse.

[0043] The gas turbine system primarily consists of a generator 10 and a waste heat boiler 11. The generator 10 inlet is connected to the gas outlet of the air oxidation reactor 1. The superheated steam outlet of the waste heat boiler 11 is connected to the steam inlets of the reduction reactor 2 and the hydrogen production reactor 4. The waste heat boiler 11 inlet is connected to the condensate system after heat exchange between the PSA and combustion reactor 5.

[0044] The circulation direction of the oxygen carrier in the entire system is: air oxidation reactor 1 → combustion reactor 5 → hydrogen production reactor 4 → oxygen carrier lifter 3 → regeneration tank → air oxidation reactor 1.

[0045] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A heat-electricity-hydrogen cogeneration system based on chemical looping technology, characterized in that: The system includes: an air separation system, a gas turbine system, a methane supply system and a chemical chain hydrogen production system; the air separation system is used to separate the input air into nitrogen and oxygen-rich gas, and the gas turbine system is connected to the methane supply system; The chemical loop hydrogen production system includes: an air oxidation reactor, a reduction reactor, an oxygen carrier lifter, a hydrogen production reactor, a combustion reactor and a hydrogen separator; The nitrogen and oxygen-rich gas separated by the air separation system are respectively input to the oxygen carrier lifter and the air oxidation reactor; the methane supply system is used to input methane to the gas turbine system and the reduction reactor; the water vapor generated by the gas turbine system is input to the reduction reactor and the hydrogen production reactor; and the condensed water generated by the reduction reactor and the hydrogen production reactor is respectively input to the gas turbine system; The gas outlet of the air oxidation reactor is connected to the gas turbine system, the oxygen carrier outlet is connected to the first inlet of the reduction reactor and the combustion reactor respectively, the oxygen carrier outlet of the reduction reactor is connected to the oxygen carrier lifter, and the oxygen carrier lifter is connected to the oxygen carrier inlet of the air oxidation reactor; the gas outlet of the reduction reactor is connected to the hydrogen separator, and the exhaust gas outlet of the hydrogen separator is connected to the second inlet of the combustion reactor; the oxygen carrier outlet of the combustion reactor is connected to the hydrogen production reactor, and the oxygen carrier outlet of the hydrogen production reactor is connected to the oxygen carrier lifter.

2. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 1 is characterized in that: The system further comprises: a first water vapor adsorption device, wherein the inlet of the first water vapor adsorption device is connected to the gas outlet of the reduction reactor, the gas outlet is connected to the hydrogen separator, and the liquid outlet is connected to the gas turbine system; a second water vapor adsorption device, wherein the second water vapor adsorption device is connected to the gas outlet of the hydrogen production reactor, and the liquid outlet is connected to the gas turbine system; a third water vapor adsorption device, wherein the third water vapor adsorption device is connected to the gas outlet of the combustion reactor, and the liquid outlet is connected to the gas turbine system; A carbon dioxide capture device is connected to the gas outlet of the third water vapor adsorption device.

3. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 2 is characterized in that: The gas turbine system comprises: a generator, the generator being connected to the gas outlet of the air oxidation reactor and the methane supply system respectively; A waste heat boiler is connected to the generator, and the inlet of the waste heat boiler is also connected to the liquid outlets of the first water vapor adsorption device, the second water vapor adsorption device, and the third water vapor adsorption device, respectively; the gas outlet of the waste heat boiler is connected to the reduction reactor and the hydrogen production reactor, respectively.

4. A heat-electricity-hydrogen cogeneration system based on chemical looping technology, characterized in that: The system includes: an air separation system, a gas turbine system, a methane supply system and a chemical chain hydrogen production system; the air separation system is used to separate the input air into nitrogen and oxygen-rich gas, and the gas turbine system is connected to the methane supply system; The chemical loop hydrogen production system includes: an air oxidation reactor, a reduction reactor, an oxygen carrier lifter, a hydrogen production reactor and a hydrogen separator; The nitrogen and oxygen-rich gas separated by the air separation system are respectively input to the oxygen carrier lifter and the air oxidation reactor; the methane supply system is used to input methane to the gas turbine system and the reduction reactor; the water vapor generated by the gas turbine system is input to the reduction reactor and the hydrogen production reactor; and the condensed water generated by the reduction reactor and the hydrogen production reactor is respectively input to the gas turbine system; The gas outlet of the air oxidation reactor is connected to the gas turbine system, and the oxygen carrier outlet is connected to the first inlet of the reduction reactor; the oxygen carrier outlet of the reduction reactor is connected to the hydrogen production reactor, and the oxygen carrier outlet of the hydrogen production reactor is connected to the oxygen carrier lifter, and the oxygen carrier lifter is connected to the oxygen carrier inlet of the air oxidation reactor; the gas outlet of the reduction reactor is connected to the hydrogen separator, and the exhaust gas outlet of the hydrogen separator is connected to the second inlet of the reduction reactor.

5. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 4 is characterized in that: The system further comprises: a first water vapor adsorption device, wherein the inlet of the first water vapor adsorption device is connected to the gas outlet of the reduction reactor, the gas outlet is connected to the hydrogen separator, and the liquid outlet is connected to the gas turbine system; a second water vapor adsorption device, wherein the second water vapor adsorption device is connected to the gas outlet of the hydrogen production reactor, and the liquid outlet is connected to the gas turbine system; A carbon dioxide capture device is connected to the gas outlet of the first water vapor adsorption device.

6. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 5 is characterized in that: The gas turbine system comprises: a generator, the generator being connected to the gas outlet of the air oxidation reactor and the methane supply system respectively; A waste heat boiler is connected to the generator, and the inlet of the waste heat boiler is also connected to the liquid outlets of the first water vapor adsorption device and the second water vapor adsorption device respectively, and the gas outlet of the waste heat boiler is connected to the reduction reactor and the hydrogen production reactor respectively.

7. A heat-electricity-hydrogen cogeneration system based on chemical looping technology, characterized in that: The system includes: an air separation system, a gas turbine system, a methane supply system and a chemical chain hydrogen production system; the air separation system is used to separate the input air into nitrogen and oxygen-rich gas, and the gas turbine system is connected to the methane supply system; The chemical loop hydrogen production system includes: an air oxidation reactor, an oxygen carrier lifter, a hydrogen production reactor, a combustion reactor and a hydrogen separator; The nitrogen and oxygen-rich gas separated by the air separation system are respectively input to the oxygen carrier riser and the air oxidation reactor; the methane supply system is used to input methane to the gas turbine system and the combustion reactor; the water vapor generated by the gas turbine system is input to the hydrogen production reactor; and the condensed water generated by the hydrogen production reactor and the combustion reactor is input to the gas turbine system; The gas outlet of the air oxidation reactor is connected to the gas turbine system, the oxygen carrier outlet is connected to the inlet of the combustion reactor, the oxygen carrier outlet of the combustion reactor is connected to the hydrogen production reactor, the oxygen carrier outlet of the hydrogen production reactor is connected to the oxygen carrier riser, and the oxygen carrier riser is connected to the oxygen carrier inlet of the air oxidation reactor.

8. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 7 is characterized in that: The system further comprises: a first water vapor adsorption device, wherein the inlet of the first water vapor adsorption device is connected to the gas outlet of the hydrogen production reactor, and the liquid outlet is connected to the gas turbine system; a second water vapor adsorption device, wherein the second water vapor adsorption device is connected to the gas outlet of the combustion reactor and the liquid outlet is connected to the gas turbine system; A carbon dioxide capture device is connected to the gas outlet of the second water vapor adsorption device.

9. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 8 is characterized in that: The gas turbine system comprises: a generator, the generator being connected to the gas outlet of the air oxidation reactor and the methane supply system respectively; A waste heat boiler is connected to the generator, and the inlet of the waste heat boiler is also connected to the liquid outlets of the first water vapor adsorption device and the second water vapor adsorption device respectively, and the gas outlet of the waste heat boiler is connected to the hydrogen production reactor.

10. The heat-electricity-hydrogen cogeneration system based on chemical looping technology according to claim 1, characterized in that: The chemical chain hydrogen production system further includes a regeneration storage tank; the regeneration storage tank is connected to the oxygen carrier lifter and the air oxidation reactor respectively.

Images