Integrated solid oxide battery synthesis gas preparation system

Abstract

The utility model relates to the technical field of solid oxide cells, and discloses an integrated solid oxide cell synthesis gas preparation system, which comprises a burner, a solid oxide fuel cell and a solid oxide electrolytic tank, and the solid oxide fuel cell and the solid oxide electrolytic tank are communicated with the burner. The system further comprises a heat insulation outer layer shell, the solid oxide electrolytic cell is arranged in the center of the top end of an inner cavity of the heat insulation outer layer shell, the solid oxide fuel cell is arranged on the periphery of the solid oxide electrolytic cell in the inner cavity of the heat insulation outer layer shell, and the combustor is placed at the bottom of the inner cavity of the heat insulation outer layer shell. According to the utility model, the uniform temperature distribution of the integrated equipment is realized, the waste of reactants is avoided, the reasonable distribution of energy, the gradient utilization of heat and the centralized layout and efficient coupling of the equipment are realized, and the comprehensive efficiency of the system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to solid oxide battery technical field, concretely relates to a kind of integrated solid oxide battery system for synthesis gas. BACKGROUND

[0002] China's industrial system is complete, and the production capacity is huge, which produces a large amount of industrial byproduct gas with complex components during the production process. In order to achieve emission reduction and high value-added utilization, the current utilization of industrial byproduct gas usually needs to go through multiple processes such as purification, conversion, separation, purification, compression and catalysis. The process flow is long and energy-consuming, resulting in high cost. Especially in the process of preparing hydrogen and carbon monoxide synthesis gas, hydrogen needs to be purified and stored and transported first, and then synthesis gas is further prepared. Not only is the process complex, but also the catalytic process is energy-consuming and the storage and transportation cost is high, and the existing technology cannot realize the direct and effective utilization of various byproduct gases.

[0003] Solid oxide fuel cells are suitable for directly using various industrial byproduct gases as raw materials due to their full solid-state structure, no noble metal catalysis, strong fuel compatibility and good sulfur resistance. Solid oxide electrolysis cells are reverse process devices of solid oxide fuel cells, which have a unique ability to co-electrolyze carbon dioxide and water to directly prepare hydrogen and carbon monoxide synthesis gas. Although solid oxide fuel cells and solid oxide electrolysis cells have been widely proposed for application in industrial systems, there is still a lack of an integrated synthesis gas preparation device suitable for various industrial byproduct gases, resulting in complex synthesis gas preparation process, high production cost and low conversion efficiency. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides an integrated solid oxide battery system for synthesis gas, which combines solid oxide fuel cells, burners and solid oxide electrolysis cells to design an integrated solid oxide battery. The integrated solid oxide battery can directly utilize various industrial byproduct gases to prepare hydrogen and carbon monoxide synthesis gas, simplifying the process flow, reducing the production cost and improving the conversion efficiency, and realizing the full utilization of energy.

[0005] To achieve the above-mentioned purpose of simplifying the process flow, reducing the production cost and improving the conversion efficiency, the utility model provides the following technical solutions:

[0006] An integrated solid oxide cell system for syngas production, comprising: a combustor, a solid oxide fuel cell and a solid oxide electrolysis cell in communication with the combustor; a tail gas outlet of the solid oxide fuel cell in communication with an inlet of the combustor, a tail gas outlet of the combustor in communication with a mixed steam inlet of the solid oxide electrolysis cell; the solid oxide fuel cell being externally connected with an industrial off-gas pipeline, the solid oxide electrolysis cell being externally connected with a high-temperature steam pipeline and a carbon dioxide pipeline.

[0007] Further, the system further comprises: an adiabatic outer shell, the solid oxide electrolysis cell being arranged at a top center of an inner cavity of the adiabatic outer shell, the solid oxide fuel cell being arranged at a periphery of the solid oxide electrolysis cell in the inner cavity of the adiabatic outer shell, and the combustor being placed at a bottom of the inner cavity of the adiabatic outer shell.

[0008] Further, the solid oxide fuel cell is a flat-tube solid oxide fuel cell, the solid oxide electrolysis cell is a tube-type solid oxide electrolysis cell, and the combustor is a tail gas combustor.

[0009] Further, the number of tube-type structures of the solid oxide electrolysis cell is 6 groups, the number of solid oxide fuel cells is 6 groups, and the adiabatic outer shell is a cylindrical shape.

[0010] Further, the integrated solid oxide cell system for syngas production further comprises: an auxiliary power generation device, and an electrical accumulator connected with the auxiliary power generation device.

[0011] Further, the integrated solid oxide cell system for syngas production further comprises: an electric motor, and a compressor connected with the electric motor, the electric motor being connected with the electrical accumulator, the compressor being in communication with a cathode of the solid oxide cell, and the compressor being in communication with an anode of the solid oxide electrolysis cell.

[0012] Further, the integrated solid oxide cell system for syngas production further comprises: an intermediate gas processing unit, the intermediate gas processing unit comprising: a gas turbine, a generator connected with the gas turbine, and a gas storage bin in communication with the gas turbine, an inlet of the gas turbine being in communication with an outlet of the combustor, a tail gas outlet of the gas turbine being in communication with an inlet of the gas storage bin, and an outlet of the gas storage bin being in communication with a cathode of the solid oxide electrolysis cell.

[0013] Further, a pipeline between the outlet of the gas storage bin and the cathode of the solid oxide electrolysis cell is further provided with a throttle valve and a gas flow mixer.

[0014] Further, the integrated solid oxide cell system for syngas production further comprises: a syngas collection bin.

[0015] Compared with the prior art, the integrated solid oxide cell system for synthesizing gas has the following beneficial effects:

[0016] Firstly, the integrated solid oxide cell system for synthesizing gas has the effect of directly utilizing industrial by-product gas to prepare hydrogen and carbon monoxide synthesis gas without purification catalysis, avoids the complex process of preparing chemical products from industrial by-product gas, is suitable for various types of industrial by-product gas, and greatly improves the utilization rate of industrial by-product gas.

[0017] Secondly, the integrated solid oxide cell system for synthesizing gas realizes uniform temperature distribution of the integrated equipment, avoids waste of reactants, realizes reasonable distribution of energy and gradient utilization of heat, realizes centralized layout and efficient coupling of the equipment, and improves the comprehensive efficiency of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a flow chart of the integrated solid oxide cell system for synthesizing gas of the utility model;

[0019] Figure 3 is a schematic diagram of the integrated solid oxide cell structure of the utility model;

[0020] Figure 4 is a top view of the integrated solid oxide cell structure of the utility model.

[0021] Figure 2 is a system structure diagram of the integrated solid oxide cell system for synthesizing gas of the utility model;

[0022] In the drawings: 1, motor; 2, compressor; 3, generator; 4, solid oxide fuel cell; 5, solid oxide electrolysis cell; 6, combustor; 7, gas turbine; 8, gas storage warehouse; 9, throttle valve; 10, gas flow mixer; 11, synthesis gas collection warehouse; 12, sulfur removal device; 13, auxiliary power generation equipment; 14, power storage device; 15, adiabatic outer shell. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figure 1A system for producing synthesis gas by integrated solid oxide cell, comprising: a burner 6, and a solid oxide fuel cell 4 and a solid oxide electrolysis cell 5 in communication with the burner 6; when the system is in operation, various by-product gases first enter the solid oxide fuel cell to react, and the tail gas after high-temperature reaction of the solid oxide fuel cell enters the burner to be fully combusted to provide heat energy, and is further converted into mixed steam of carbon dioxide and high-temperature water vapor. The mixed high-temperature water vapor and carbon dioxide enter the solid oxide electrolysis cell to occur co-electrolysis reaction, and the product is synthesis gas of hydrogen and carbon monoxide;

[0025] Further, the solid oxide fuel cell 4 is connected with an industrial by-product gas pipeline, and the solid oxide electrolysis cell 5 is connected with a high-temperature water vapor pipeline and a carbon dioxide pipeline, so as to supply high-temperature water vapor and carbon dioxide to the solid oxide electrolysis cell.

[0026] Please refer to Figure 2 and Figure 3 The system for producing synthesis gas by integrated solid oxide cell further comprises: an adiabatic outer shell 15, the solid oxide electrolysis cell 5 is arranged at the top center of the inner cavity of the adiabatic outer shell 15, the solid oxide fuel cell 4 is arranged at the periphery of the solid oxide electrolysis cell 5 in the inner cavity of the adiabatic outer shell 15, and the burner 6 is a tail gas burner and is placed at the bottom of the inner cavity of the adiabatic outer shell 15.

[0027] Further, the solid oxide fuel cell 4 is a flat-tube solid oxide fuel cell, the solid oxide electrolysis cell 5 is a tube solid oxide electrolysis cell, and the burner 6 is a tail gas burner.

[0028] Further, please refer to Figure 3 The number of tube solid oxide electrolysis cells 5 is 6 groups, the number of flat-tube solid oxide fuel cells 4 is 6 groups, and the adiabatic outer shell 15 is a cylindrical shape.

[0029] When in operation, the industrial by-product gas enters the anode gas inlet of the solid oxide fuel cell through the top of the adiabatic outer shell 15, the air enters the cathode gas inlet of the solid oxide fuel cell through the top of the adiabatic outer shell 15, the tail gas enters the burner 6 through the gas inlet of the burner after being discharged from the anode gas outlet of the solid oxide fuel cell after full reaction, and the oxygen-enriched air enters the burner 6 through the oxygen-enriched air inlet of the burner after being discharged from the cathode gas outlet of the solid oxide fuel cell.

[0030] The working temperature of the combustor 6 is above 1000℃, and the working temperature of the solid oxide fuel cell 4 and the solid oxide electrolysis cell 5 is about 800℃ in the inner cavity of the adiabatic outer shell 15. The heat provided by the solid oxide fuel cell 4 and the combustor 6 maintains the normal operation of the solid oxide electrolysis cell 5, and the working environment inside the adiabatic outer shell 15 is stable. The flow direction in the solid oxide fuel cell 4 is co-flow, which improves the inlet temperature distribution and makes the temperature in the adiabatic outer shell 15 more uniform. The flow direction in the solid oxide electrolysis cell 5 is counter-flow, which ensures that the reaction proceeds sufficiently and is completely converted as much as possible. At the bottom of the adiabatic outer shell 15, the high temperature of the combustor 6 preheats the cathode inlet gas of the solid oxide electrolysis cell 5, which improves the reaction rate and conversion rate. At the top of the adiabatic outer shell 15, after the air enters the integrated solid oxide cell device, it is not wasted but directly enters the combustor 6 after being discharged after the reaction of the solid oxide fuel cell 4 and the solid oxide electrolysis cell 5, which saves intermediate links and improves space utilization.

[0031] Please refer to Figure 4 As a preferred embodiment, the integrated solid oxide cell system for synthesizing gas further comprises an auxiliary power generation device 13 and an electrical accumulator 14 connected to the auxiliary power generation device 13. The electrical energy generated by the auxiliary power generation device 13 is recovered into the electrical accumulator 14, and the electrical accumulator 14 supplies electrical energy to the solid oxide electrolysis cell 5 for co-electrolysis.

[0032] The system further comprises an electric motor 1 connected to the electrical accumulator 14 and a compressor 2 connected to the cathode of the solid oxide cell 4 and the anode of the solid oxide electrolysis cell 5. During operation, the electrical accumulator 14 supplies electrical energy to the electric motor 1 to drive work, and the compressor 2 is driven by the electric motor 1 to compress air into the cathode of the solid oxide fuel cell 4 and the anode of the solid oxide electrolysis cell 5.

[0033] As a preferred embodiment, the integrated solid oxide cell system for synthesizing gas further comprises a desulfurization device 12. The inlet of the desulfurization device 12 is connected to an external industrial byproduct gas pipeline, and the outlet of the desulfurization device 12 is connected to the anode inlet of the solid oxide fuel cell 4 for removing sulfides in the desulfurization type industrial byproduct gas.

[0034] As a preferred embodiment, the integrated solid oxide cell system for synthesizing gas further comprises an intermediate gas treatment unit, which comprises a gas turbine 7, a generator 3 connected to the gas turbine 7, and a gas storage bin 8 connected to the gas turbine 7.

[0035] The gas turbine 7 drives the generator 3, and the electricity generated by the generator 3 is recovered to the electric accumulator 14, the gas turbine 7 inlet communicates with the combustor 6 outlet, the gas turbine 7 tail gas outlet communicates with the gas storage bin 8 inlet, and the oxygen concentration of the air after the reaction of the cathode of the solid oxide fuel cell 4 and the anode of the solid oxide electrolysis cell 5 is greatly improved, and the oxygen-enriched combustion of the solid oxide fuel cell 4 tail gas occurs in the combustor 6, thereby providing a large amount of heat for the gas turbine 7.

[0036] The gas storage bin 8 outlet communicates with the cathode of the solid oxide electrolysis cell 5, and the gas storage bin 8 is used to store the compressed energy of the high-temperature gas.

[0037] As a preferred embodiment, a throttle valve 9 and an airflow mixer 10 are further arranged between the gas storage bin 8 outlet and the cathode of the solid oxide electrolysis cell 5, and the high-temperature gas discharged from the gas storage bin 8 enters the airflow mixer 10 after passing through the throttle valve 9, and the high-temperature carbon dioxide and water vapor are fully mixed in the airflow mixer 10, and the mixed steam enters the cathode of the solid oxide electrolysis cell 5 of the integrated solid oxide cell device.

[0038] As a preferred embodiment, the integrated solid oxide cell synthetic gas system further comprises a synthetic gas collection bin 11, and the synthetic gas collection bin 11 inlet communicates with the cathode outlet of the solid oxide electrolysis cell 5, and is used to store the hydrogen and carbon monoxide synthetic gas obtained by the co-electrolysis reaction of the solid oxide electrolysis cell 5.

[0039] It should be noted that, in this document, the terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0040] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An integrated solid oxide cell system for syngas production, characterized by: The system comprises a burner (6), and a solid oxide fuel cell (4) and a solid oxide electrolysis cell (5) in communication with the burner (6); the fuel gas tail gas outlet of the solid oxide fuel cell (4) is in communication with the inlet of the burner (6), and the tail gas outlet of the burner (6) is in communication with the mixed steam inlet of the solid oxide electrolysis cell (5); the solid oxide fuel cell (4) is externally connected with an industrial by-product gas pipeline, and the solid oxide electrolysis cell (5) is externally connected with a high-temperature water vapor pipeline and a carbon dioxide pipeline.

2. The integrated solid oxide cell system for syngas generation of claim 1, wherein: The system further comprises an adiabatic outer shell (15), the solid oxide electrolysis cell (5) is arranged at the top center of the inner cavity of the adiabatic outer shell (15), and the solid oxide fuel cell (4) is arranged at the periphery of the solid oxide electrolysis cell (5) in the inner cavity of the adiabatic outer shell (15), and the burner (6) is placed at the bottom of the inner cavity of the adiabatic outer shell (15).

3. The integrated solid oxide cell system for syngas generation of claim 2, wherein: The solid oxide fuel cell (4) is a flat tube type solid oxide fuel cell; the solid oxide electrolysis cell (5) is a tube type solid oxide electrolysis cell; and the burner (6) is a tail gas burner.

4. The integrated solid oxide cell system for syngas generation of claim 2, wherein: The number of tube type structures of the solid oxide electrolysis cell (5) is 6 groups; the number of solid oxide fuel cells (4) is 6 groups; and the adiabatic outer shell (15) is a cylindrical shape.

5. The integrated solid oxide cell system for syngas generation of claim 1, wherein: The system further comprises an auxiliary power generation device (13) and an electric accumulator (14) connected with the auxiliary power generation device (13).

6. The integrated solid oxide cell system for syngas generation of claim 1, wherein: The system further comprises an electric motor (1) and a compressor (2) connected with the electric motor (1), the electric motor (1) is connected with the electric accumulator (14), the compressor (2) is in communication with the cathode of the solid oxide cell (4), and the compressor (2) is in communication with the anode of the solid oxide electrolysis cell (5).

7. The integrated solid oxide cell system for syngas generation of claim 1, wherein: The system further comprises an intermediate gas treatment unit, which comprises a gas turbine (7), a power generator (3) connected with the gas turbine (7), and a gas storage bin (8) in communication with the gas turbine (7); the inlet of the gas turbine (7) is in communication with the outlet of the burner (6), the tail gas outlet of the gas turbine (7) is in communication with the inlet of the gas storage bin (8), and the outlet of the gas storage bin (8) is in communication with the cathode of the solid oxide electrolysis cell (5).

8. The integrated solid oxide cell system for syngas generation of claim 7, wherein: A throttle valve (9) and a gas flow mixer (10) are further arranged in the pipeline between the outlet of the gas storage bin (8) and the cathode of the solid oxide electrolysis cell (5).

9. The integrated solid oxide cell system for syngas generation of claim 1, wherein: The system further comprises a synthetic gas collection bin (11).

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