A photothermal electricity ammonia alcohol integrated system and method based on biomass chemical chain combustion

Abstract

The present invention discloses a photothermal electricity ammonia alcohol integrated system based on biomass chemical chaining combustion, including a photovoltaic system, an energy storage system, a chemical chaining combustion system, a photothermal power generation system, an electrolytic hydrogen production system, a gas compression storage system, a methanol synthesis system, and an ammonia synthesis system; the photovoltaic system and the photothermal power generation system are connected to the energy storage system and the electrolytic hydrogen production system; the chemical chaining combustion system is connected to the gas compression storage system through the photothermal power generation system; the gas compression storage system is connected to the methanol synthesis system and the ammonia synthesis system; the energy storage system is connected to the electrolytic hydrogen production system; the electrolytic hydrogen production system is connected to the gas compression storage system. Through energy storage optimization and multi-energy coupling, the present invention can not only ensure the stability of energy supply in off-grid areas, but also achieve a balance between economy and flexibility in industrial applications, providing technical support for green ammonia and alcohol production.

Description

Technical Field

[0001] The present invention belongs to the technical field of clean production, and in particular relates to a photothermal electricity ammonia alcohol integrated system and method based on biomass chemical chain combustion. Background Art

[0002] As global energy and environmental issues become increasingly prominent, clean and efficient renewable energy utilization technologies have received widespread attention. Solar energy and biomass energy, as two important renewable energy sources, are characterized by abundant resources, wide distribution and carbon neutrality. However, the intermittent nature of solar energy and the limited utilization efficiency of biomass energy restrict its widespread application in actual energy systems. Chemical chaining combustion technology, with its high efficiency and cleanliness, provides a new path for the efficient utilization of biomass energy. By separating air and fuel with oxygen carriers, chemical chaining combustion can achieve zero nitrogen oxide emissions and efficient capture of carbon dioxide, laying a technical foundation for the coordinated utilization of renewable energy and the green development of energy systems. Therefore, a new solution is needed that can achieve stable production of ammonia and alcohol while achieving stable operation under off-grid conditions, improve energy utilization efficiency, and achieve low carbon emissions. Summary of the invention

[0003] The purpose of the present invention is to provide an integrated system and method for photothermal electricity, ammonia and alcohol based on biomass chemical chain combustion, which achieves stable operation under off-grid conditions by deeply coupling photothermal power generation, biomass chemical chain combustion, photovoltaic power generation and energy storage technology. The system utilizes the synergistic effect of multiple energy sources to significantly improve energy utilization efficiency, and achieves low-carbon emissions through carbon neutral technology, providing a new solution for green energy development. In addition, the system realizes the ability to stably produce ammonia and alcohol, effectively responds to the environmental problems of traditional fossil energy dependence, meets the technical requirements of the green transformation and carbon neutrality goals of the chemical industry, and is particularly suitable for remote areas and areas with difficult grid coverage.

[0004] The present invention provides a photothermal power ammonia-alcohol integrated system based on biomass chemical chaining combustion, including a photovoltaic system, an energy storage system, a chemical chaining combustion system, a photothermal power generation system, an electrolytic hydrogen production system, a gas compression storage system, a methanol synthesis system, and an ammonia synthesis system;

[0005] The photovoltaic system and the solar thermal power generation system are connected to the energy storage system and the electrolysis hydrogen production system to provide electrical energy for the energy storage system and the electrolysis hydrogen production system;

[0006] The chemical looping combustion system is connected to the gas compression storage system through the photothermal power generation system, and is used to send the high-temperature mixed gas generated by combustion into the photothermal power generation system, and to send the purified nitrogen and carbon dioxide into the gas compression storage system;

[0007] The gas compression storage system is connected to the methanol synthesis system and the ammonia synthesis system, and is used to provide hydrogen and carbon dioxide to the methanol synthesis system, and to provide hydrogen and nitrogen to the ammonia synthesis system;

[0008] The energy storage system is connected to the electrolysis hydrogen production system and is used to provide electrical energy to the electrolysis hydrogen production system;

[0009] The electrolysis hydrogen production system is connected to the gas compression storage system to provide oxygen and hydrogen to the gas compression storage system.

[0010] Furthermore, the chemical chain combustion system includes a heating device, an air reactor, a fuel reactor, an N2 purification device, and a CO2 purification device.

[0011] Furthermore, the solar thermal power generation system includes a solar energy collection system, a high-temperature storage tank, a low-temperature storage tank, a steam generating device, a condenser, a cooling tower, a generator, and a steam turbine.

[0012] Furthermore, the electrolysis hydrogen production system includes an alkaline electrolyzer.

[0013] Furthermore, the gas compression storage system includes an O2 compressor, an H2 compressor, an N2 compressor, a CO2 compressor, an oxygen cooler, a nitrogen cooler, a hydrogen cooler, a carbon dioxide cooler, an O2 storage tank, an H2 storage tank, an N2 storage tank, and a CO2 storage tank.

[0014] Further, the steam turbine is connected to the energy storage system and the alkaline electrolyzer through the generator, the steam turbine is connected to the steam generating device through the drain pipe of the condenser, and the steam generating device is connected to the steam turbine through a high-temperature steam pipe;

[0015] The air reactor and the fuel reactor are connected to the steam generating device through a mixed gas pipeline, one end of the N2 purification device and the CO2 purification device are connected to the steam generating device, and the other end is connected to the N2 compressor and the CO2 compressor respectively, the N2 compressor and the CO2 compressor are connected to the N2 storage tank and the CO2 storage tank respectively through a nitrogen cooler and a carbon dioxide cooler, the N2 storage tank is connected to the ammonia synthesis system, and the CO2 storage tank is connected to the methanol synthesis system;

[0016] The alkaline electrolyzer is connected to an oxygen cooler and a hydrogen cooler through an O2 compressor and an H2 compressor, respectively. The oxygen cooler and the hydrogen cooler are connected to the O2 storage tank and the H2 storage tank, respectively. The O2 storage tank is connected to the air reactor, and the H2 storage tank is connected to the methanol synthesis system and the ammonia synthesis system.

[0017] The present invention also provides an operation method of the integrated light-heat-electricity-ammonia-alcohol system based on biomass chemical chaining combustion, comprising:

[0018] It operates in a completely off-grid mode, and the power generated by the photovoltaic system and the solar thermal power generation system is completely used to support the electricity demand of the overall integrated system. It does not sell electricity to the grid, nor does it draw electricity from the grid.

[0019] Furthermore, the chemical chaining combustion system is used as a stable heat source for the solar thermal power generation system to support the power generation stability of the system.

[0020] Furthermore, the energy storage system is used to smooth out fluctuations in power generation from the photovoltaic system and solar thermal power generation system.

[0021] Furthermore, the air is heated to 350°C by a heating device and then enters the air reactor. In the air reactor, the air and the low-valent oxygen carrier undergo redox reactions, and the oxygen carrier increases from a low-valent state to a high-valent state, and releases a large amount of heat. The oxygen carrier with a higher valence enters the fuel reactor. The air and oxygen carrier dust mixture after the reaction enters the N2 purification and cooling system. After passing through the N2 purification and cooling system, the oxygen carrier in the mixture is captured and returned to the air reactor to continue to participate in the reaction. At the same time, the air after the reaction is purified, and a small amount of impurity gas in the gas is removed and discharged, thereby obtaining high-concentration N2; the high-quality heat captured in the N2 purification and cooling system is transported to the steam generating device of the solar thermal power generation system for generating high-quality steam; the obtained high-concentration N2 enters the N2 compressor and the nitrogen cooler for compression and cooling. The low-quality heat during the compression process is used for the low-temperature heating process of the desalted water during the hydrogen production process, and the compressed N2 enters the N2 storage tank for storage; the N2 production is controlled by supplementing O2 in the heated air, and the oxygen produced by hydrogen production is used as a supplementary source;

[0022] After water is connected in parallel to recover low-quality heat from the oxygen cooler, nitrogen cooler, hydrogen cooler, and carbon dioxide cooler, the temperature is raised to 60°C, and then heated to 350°C by a heating device to obtain high-temperature steam. The high-temperature steam and biomass enter the fuel reactor together, and undergo redox reactions with high-valent oxygen carriers in the fuel reactor. The oxygen carriers are reduced from a high-valent state to a low-valent state, and heat is released. The oxygen carriers with reduced valence enter the air reactor. After the water vapor reacts with the coal, a high-humidity mixed gas is obtained and enters the CO2 purification cooling system. After the CO2 purification cooling system, solid impurities, Water and a small amount of impurity gases are captured and processed to obtain high-concentration CO2; the high-quality heat captured from the CO2 purification and cooling system is transported to the steam generating device in the solar thermal power generation system to produce high-quality steam; the obtained high-concentration CO2 enters the CO2 compressor and carbon dioxide cooler for compression and cooling, and the low-quality heat during the compression process is used for the low-temperature heating process of desalted water in the hydrogen production process, and the compressed N2 enters the N2 storage tank for storage; the N2 storage tank and the H2 storage tank are directly connected to the ammonia synthesis system for ammonia synthesis; the CO2 storage tank and the H2 storage tank are directly connected to the methanol synthesis system for methanol synthesis.

[0023] Through the above scheme, the integrated system and method of light, heat, electricity, ammonia and alcohol based on biomass chemical chain combustion has the following technical effects:

[0024] 1. Through the deep thermal coupling of the thermoelectric characteristics of the CSP system and the biomass-based chemical chaining combustion technology, the chemical chaining combustion technology is used to provide a stable heat source for the CSP system, which can smooth the volatility of the CSP system to a certain extent and promote the efficient use of renewable energy.

[0025] 2. Through the coupling of biomass and photovoltaic thermal systems, a pure green integrated ammonia preparation system was constructed, completely getting rid of dependence on fossil fuels.

[0026] 3. Through multi-energy coupling and energy storage optimization configuration, the impact of energy volatility on the production process can be effectively reduced, and energy utilization efficiency can be improved, thus achieving a balance between economy and flexibility.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the integrated photothermal electricity ammonia alcohol system based on biomass chemical chain combustion of the present invention. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] Ginseng Figure 1 As shown, this embodiment provides an integrated photothermal, electric, ammonia and alcohol system based on biomass chemical chain combustion, including a photovoltaic system, an energy storage system, a chemical chain combustion system, a photothermal power generation system, an electrolytic hydrogen production system, a gas compression storage system, a methanol synthesis system, and an ammonia synthesis system; the photovoltaic system and the photothermal power generation system are connected to the energy storage system and the electrolytic hydrogen production system to provide electrical energy for the energy storage system and the electrolytic hydrogen production system; the chemical chain combustion system is connected to the gas compression storage system through the photothermal power generation system to feed the high-temperature mixed gas generated by combustion into the photothermal power generation system, and to feed the purified nitrogen and carbon dioxide into the gas compression storage system; the gas compression storage system is connected to the methanol synthesis system and the ammonia synthesis system to provide hydrogen and carbon dioxide for the methanol synthesis system, and to provide hydrogen and nitrogen for the ammonia synthesis system; the energy storage system is connected to the electrolytic hydrogen production system to provide electrical energy for the electrolytic hydrogen production system; the electrolytic hydrogen production system is connected to the gas compression storage system to provide oxygen and hydrogen for the gas compression storage system. The chemical chain combustion system includes a heating device, an air reactor, a fuel reactor, an N2 purification device, and a CO2 purification device. The solar thermal power generation system includes a solar energy collection system, a high-temperature storage tank, a low-temperature storage tank, a steam generating device, a condenser, a cooling tower, a generator, and a steam turbine. The electrolytic hydrogen production system includes an alkaline electrolyzer. The gas compression storage system includes an O2 compressor, an H2 compressor, an N2 compressor, a CO2 compressor, an oxygen cooler, a nitrogen cooler, a hydrogen cooler, a carbon dioxide cooler, an O2 storage tank, an H2 storage tank, an N2 storage tank, and a CO2 storage tank. The steam turbine is connected to the energy storage system and the alkaline electrolyzer through the generator, the steam turbine is connected to the steam generating device through the drain pipe of the condenser, and the steam generating device is connected to the steam turbine through a high-temperature steam pipeline;

[0031] The air reactor and the fuel reactor are connected to the steam generating device through a mixed gas pipeline. One end of the N2 purification device and the CO2 purification device are connected to the steam generating device, and the other end is connected to the N2 compressor and the CO2 compressor respectively. The N2 compressor and the CO2 compressor are connected to the N2 storage tank and the CO2 storage tank respectively through a nitrogen cooler and a carbon dioxide cooler. The N2 storage tank is connected to the ammonia synthesis system, and the CO2 storage tank is connected to the methanol synthesis system; the alkaline electrolyzer is connected to the oxygen cooler and the hydrogen cooler through the O2 compressor and the H2 compressor respectively. The oxygen cooler and the hydrogen cooler are connected to the O2 storage tank and the H2 storage tank respectively. The O2 storage tank is connected to the air reactor, and the H2 storage tank is connected to the methanol synthesis system and the ammonia synthesis system.

[0032] The integrated system operates as follows:

[0033] The system is operated completely off-grid. The power generated by the photovoltaic system and the solar thermal power generation system is fully used to support the power demand of the entire system. No electricity is sold to the grid, nor is electricity taken from the grid. At the same time, the chemical chaining combustion system is used as a stable heat source for the solar thermal power generation system to support the stability of the system's power generation. The energy storage system is configured in the system to smooth out the fluctuations in power generation generated by the new energy system in the system.

[0034] The air is heated to 350°C by the heating device and then enters the air reactor. In the air reactor, the air undergoes an oxidation-reduction reaction with the low-valent oxygen carrier, and the oxygen carrier increases from the low-valent state to the high-valent state, and releases a large amount of heat. The oxygen carrier with the increased valence enters the fuel reactor. The air and oxygen carrier dust mixture after the reaction enters the N2 purification and cooling system. After passing through the N2 purification and cooling system, the oxygen carrier in the mixture is captured and returned to the air reactor to continue to participate in the reaction. At the same time, the air after the reaction is purified, and a small amount of impurity gas in the gas is removed and discharged, thereby obtaining high-concentration N2. Because the temperature of the mixed gas entering the N2 purification and cooling system is as high as 1100°C, the high-quality heat captured in this system will be transported to the steam generator of the solar thermal power generation system to generate high-quality steam. The obtained high-concentration N2 enters the N2 compression and cooling system for compression and cooling. The low-quality heat during the compression process is used for the low-temperature heating process of desalted water during the hydrogen production process. The compressed N2 enters the N2 storage tank for storage. It should be noted that in order to control the N2 production, O2 can be added to the heated air. In this method, oxygen produced by hydrogen production is used as a supplementary source.

[0035] After the water is connected in parallel to recover the low-quality heat of the oxygen cooler, nitrogen cooler, hydrogen cooler, and carbon dioxide cooler, the temperature is raised to 60°C, and then the temperature is raised to 350°C by the heating device to obtain high-temperature steam. The high-temperature steam and biomass enter the fuel reactor together, and undergo redox reactions with high-valent oxygen carriers in the fuel reactor. The oxygen carriers are reduced from high valence to low valence and release heat. The oxygen carriers with reduced valence enter the air reactor. After the water vapor reacts with the coal, a high-humidity mixed gas is obtained and enters the CO2 purification and cooling system. After the CO2 purification and cooling system, the solid impurities, moisture, and a small amount of impurity gases in the mixed gas are captured and processed to obtain high-concentration CO2. Because the temperature of the mixed gas entering the CO2 purification and cooling system is relatively high, the high-quality heat captured in this system will be transported to the steam generator in the solar thermal power generation system to generate high-quality steam. The obtained high-concentration CO2 enters the CO2 compression and cooling system for compression and cooling. The low-quality heat during the compression process is used for the low-temperature heating process of desalted water in the hydrogen production process. The compressed N2 enters the N2 storage tank for storage.

[0036] The N2 storage tank and H2 storage tank are directly connected to the ammonia synthesis system for the synthesis of ammonia.

[0037] The CO2 storage tank and H2 storage tank are directly connected to the methanol synthesis system for the synthesis of methanol.

[0038] This integrated operation system, through energy storage optimization and multi-energy coupling, can not only ensure the stability of energy supply in off-grid areas, but also achieve a balance between economy and flexibility in industrial applications, and provide technical support for green ammonia and alcohol production. Its green, clean and sustainable energy conversion characteristics have wide application value in the energy and chemical industries. At the same time, the decarbonization characteristics of the system provide an important reference for the construction and promotion of future clean energy systems, and promote the innovation and industrialization of energy technologies. The application prospects of this technology are broad, not only with significant environmental benefits, but also with far-reaching impacts on social and economic development.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A photothermal electricity, ammonia and alcohol integrated system based on biomass chemical chain combustion, characterized in that: Including photovoltaic systems, energy storage systems, chemical chain combustion systems, solar thermal power generation systems, electrolytic hydrogen production systems, gas compression and storage systems, methanol synthesis systems, and ammonia synthesis systems; The photovoltaic system and the solar thermal power generation system are connected to the energy storage system and the electrolysis hydrogen production system to provide electrical energy for the energy storage system and the electrolysis hydrogen production system; The chemical looping combustion system is connected to the gas compression storage system through the photothermal power generation system, and is used to send the high-temperature mixed gas generated by combustion into the photothermal power generation system, and to send the purified nitrogen and carbon dioxide into the gas compression storage system; The gas compression storage system is connected to the methanol synthesis system and the ammonia synthesis system, and is used to provide hydrogen and carbon dioxide to the methanol synthesis system, and to provide hydrogen and nitrogen to the ammonia synthesis system; The energy storage system is connected to the electrolysis hydrogen production system and is used to provide electrical energy to the electrolysis hydrogen production system; The electrolysis hydrogen production system is connected to the gas compression storage system to provide oxygen and hydrogen to the gas compression storage system.

2. The integrated light-heat-electricity-ammonia-alcohol system based on biomass chemical chaining combustion according to claim 1 is characterized in that: The chemical chain combustion system includes a heating device, an air reactor, a fuel reactor, an N2 purification device, and a CO2 purification device.

3. The integrated light-heat-electricity-ammonia-alcohol system based on biomass chemical chaining combustion according to claim 2 is characterized in that: The solar thermal power generation system includes a solar energy collection system, a high-temperature storage tank, a low-temperature storage tank, a steam generating device, a condenser, a cooling tower, a generator, and a steam turbine.

4. The integrated light-heat-electricity-ammonia-alcohol system based on biomass chemical chaining combustion according to claim 3 is characterized in that: The electrolytic hydrogen production system includes an alkaline electrolyzer.

5. The integrated light-heat-electricity-ammonia-alcohol system based on biomass chemical chaining combustion according to claim 4 is characterized in that: The gas compression storage system includes an O2 compressor, an H2 compressor, an N2 compressor, a CO2 compressor, an oxygen cooler, a nitrogen cooler, a hydrogen cooler, a carbon dioxide cooler, an O2 storage tank, an H2 storage tank, an N2 storage tank, and a CO2 storage tank.

6. The integrated photothermal power ammonia-alcohol system based on biomass chemical chaining combustion according to claim 5 is characterized in that: The steam turbine is connected to the energy storage system and the alkaline electrolyzer through the generator, the steam turbine is connected to the steam generating device through the drain pipe of the condenser, and the steam generating device is connected to the steam turbine through a high-temperature steam pipe; The air reactor and the fuel reactor are connected to the steam generating device through a mixed gas pipeline, one end of the N2 purification device and the CO2 purification device are connected to the steam generating device, and the other end is connected to the N2 compressor and the CO2 compressor respectively, the N2 compressor and the CO2 compressor are connected to the N2 storage tank and the CO2 storage tank respectively through a nitrogen cooler and a carbon dioxide cooler, the N2 storage tank is connected to the ammonia synthesis system, and the CO2 storage tank is connected to the methanol synthesis system; The alkaline electrolyzer is connected to an oxygen cooler and a hydrogen cooler through an O2 compressor and an H2 compressor, respectively. The oxygen cooler and the hydrogen cooler are connected to the O2 storage tank and the H2 storage tank, respectively. The O2 storage tank is connected to the air reactor, and the H2 storage tank is connected to the methanol synthesis system and the ammonia synthesis system.

7. A method for operating the integrated photothermal power ammonia alcohol system based on biomass chemical chaining combustion according to any one of claims 1 to 6, characterized in that: include: It operates in a completely off-grid mode, and the power generated by the photovoltaic system and the solar thermal power generation system is completely used to support the electricity demand of the overall integrated system. It does not sell electricity to the grid, nor does it draw electricity from the grid.

8. The method according to claim 7, characterized in that The chemical chain combustion system is used as a stable heat source for the solar thermal power generation system to support the stability of the system's power generation.

9. The method according to claim 8, characterized in that The energy storage system is used to smooth out the fluctuations in power generation generated by the photovoltaic system and solar thermal power generation system in the system.

10. The method according to claim 9, characterized in that The air is heated to 350°C by a heating device and then enters the air reactor. In the air reactor, the air and the low-valent oxygen carrier undergo redox reactions, and the oxygen carrier increases from a low valence state to a high valence state, and releases a large amount of heat. The oxygen carrier with a higher valence state enters the fuel reactor. The air and oxygen carrier dust mixture after the reaction enters the N2 purification and cooling system. After passing through the N2 purification and cooling system, the oxygen carrier in the mixture is captured and returned to the air reactor to continue to participate in the reaction. At the same time, the air after the reaction is purified, and a small amount of impurity gas in the gas is removed and discharged, thereby obtaining high-concentration N2; the high-quality heat captured in the N2 purification and cooling system is transported to the steam generating device of the solar thermal power generation system for generating high-quality steam; the obtained high-concentration N2 enters the N2 compressor and nitrogen cooler for compression and cooling. The low-quality heat during the compression process is used for the low-temperature heating process of the desalted water during the hydrogen production process, and the compressed N2 enters the N2 storage tank for storage; the N2 production is controlled by supplementing O2 in the heated air, and the oxygen produced by hydrogen production is used as a supplementary source; After water is connected in parallel to recover low-quality heat from the oxygen cooler, nitrogen cooler, hydrogen cooler, and carbon dioxide cooler, the temperature is raised to 60°C, and then heated to 350°C by a heating device to obtain high-temperature steam. The high-temperature steam and biomass enter the fuel reactor together, and undergo redox reactions with high-valent oxygen carriers in the fuel reactor. The oxygen carriers are reduced from a high-valent state to a low-valent state, and heat is released. The oxygen carriers with reduced valence enter the air reactor. After the water vapor reacts with the coal, a high-humidity mixed gas is obtained and enters the CO2 purification cooling system. After the CO2 purification cooling system, solid impurities, Water and a small amount of impurity gases are captured and processed to obtain high-concentration CO2; the high-quality heat captured from the CO2 purification and cooling system is transported to the steam generating device in the solar thermal power generation system to produce high-quality steam; the obtained high-concentration CO2 enters the CO2 compressor and carbon dioxide cooler for compression and cooling, and the low-quality heat during the compression process is used for the low-temperature heating process of desalted water in the hydrogen production process, and the compressed N2 enters the N2 storage tank for storage; the N2 storage tank and the H2 storage tank are directly connected to the ammonia synthesis system for ammonia synthesis; the CO2 storage tank and the H2 storage tank are directly connected to the methanol synthesis system for methanol synthesis.

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