Iron bath coupled SOEC gas production equipment

Abstract

The utility model relates to gas production equipment for coupling an iron bath with SOEC. The equipment consists of an iron bath gas production furnace module, a heat exchange module and an SOEC electrolytic tank module, main equipment of the iron bath gas making furnace module is an iron bath gas making furnace, and a molten iron inlet is formed in a furnace body corresponding to the molten iron pool; a molten iron outlet is formed in the bottom furnace body of the molten iron tank; a raw material feeding device is arranged on the furnace body of the iron bath gas making furnace; a slag discharging opening is formed in the iron bath gas making furnace body; the iron bath gas making furnace is provided with an oxygen blowing device; the iron bath gas making furnace is provided with a gas outlet; a gas outlet of the iron bath gas making furnace is connected with a high-temperature medium inlet of the heat exchange module; a low-temperature medium outlet of the heat exchange module is connected with an SOEC inlet; and an SOEC anode outlet is connected with an oxygen blowing device of the iron bath gas making furnace. According to the utility model, the iron bath gas production furnace and the SOEC electrolytic hydrogen production equipment are organically combined, so that the advantages of the iron bath gas production furnace and the SOEC electrolytic hydrogen production equipment are fully exerted, and the device has the characteristics of high product gas quality, high waste heat utilization rate, low production cost and the like.

Description

Technical Field

[0001] It belongs to the field of chemical gas production. Background Art

[0002] At present, with the global warming and the gradual emergence of the damage of the greenhouse effect to the earth's ecological circle, reducing greenhouse gas emissions has become extremely urgent. An important step in reducing carbon dioxide emissions is to reduce the dependence of transportation tools on fossil energy. At present, methanol is a recognized suitable substitute for petroleum fuels. The synthesis of methanol requires carbon monoxide and hydrogen as raw materials. Each year, a large amount of biomass produced in agricultural production or in nature is either burned or finally decomposed by bacteria, forming carbon dioxide and returning to nature. If these biomasses can be utilized so that the energy released during their final conversion into carbon dioxide is not wasted in meaningless burning and bacterial decomposition, but is industrially decomposed into carbon monoxide and hydrogen, and then further synthesized into methanol, ultimately serving human production and transportation, then the dependence on fossil energy can be greatly reduced, and the additional carbon dioxide emissions from humans to the earth's ecological circle outside the carbon cycle of nature can be reduced. The process of biomass pyrolysis to generate carbon monoxide and hydrogen requires energy, which can be provided by the electric energy formed by photovoltaic or wind power. The present utility model aims at the above problems and proposes a completely implementable production device. Summary of the Invention

[0003] A gas production device coupling an iron bath with an SOEC, characterized in that it includes a raw material treatment module (1), an iron bath gas production furnace module (2), a heat exchange module (3), and an SOEC solid organic matter electrolytic cell module (4).

[0004] The main equipment of the iron bath gasification furnace module (2) is the iron bath gasification furnace (20). Inside the iron bath gasification furnace (20), there are an iron water pool (26) and a slag pool (27) arranged from bottom to top; an iron water inlet (21) is provided on the furnace body corresponding to the iron water pool (26); an iron water outlet (28) is provided on the furnace body at the bottom of the iron water pool (26); the iron bath gasification furnace (20) is equipped with a raw material feeding device (22) for feeding the processed organic raw materials into the iron water pool (26) or the slag pool (27) above the iron water pool (26), and at the same time having the function of conveying and supplementing iron ore and / or slag adjusting solvent to the iron water pool (26). If the organic raw materials are processed into granular form, the raw material feeding device (22) can be a spray gun, using the conveying carrier gas as the medium to spray the organic raw material particles into the iron water pool (26) or the slag pool (27); or the raw material feeding device (22) is equipment such as a screw feeder to press the processed organic raw material particles into the iron water pool (26) or the slag pool (27); if the organic raw materials are in the form of compacts or bundled into stacks, the raw material feeding device (22) can be in the form of a channel with a push rod to send them into the iron water pool (26) or the slag pool (27). It should be noted that the raw material feeding device (22) also needs to consider the problem of gas sealing in the furnace, so in case of need, it should also include devices such as gate valves and buffer storage tanks. The processed organic raw materials in the iron water pool (26) or the slag pool (27), due to the high temperature of the iron water pool, are rapidly cracked to generate carbon, slag and hydrogen, and the slag forms the slag pool (27). The high temperature of the iron water pool provides excellent conditions for the complete cracking of macromolecules, making the cracking process rapid and complete without generating toxic and harmful substances such as tar and dioxin. Therefore, the iron bath gasification furnace has high raw material utilization rate, high quality of synthesis gas and good economy, which is also the advantage of the iron bath gasification furnace compared with the traditional fluidized bed gasification. The iron bath gasification furnace (20) is provided with a slag discharge port (24) on the furnace body to maintain the amount of the slag pool (27) in the furnace; the iron bath gasification furnace (20) is equipped with an oxygen blowing device (23) to blow oxygen into the furnace, which reacts with the carbon generated by the cracking of the organic raw materials to generate carbon monoxide and at the same time provides heat for the iron bath gasification furnace (20); the iron bath gasification furnace (20) is provided with an air outlet (25), and the synthesis gas of carbon monoxide and hydrogen generated is discharged from the iron bath gasification furnace (20) through the air outlet (25).

[0005] The organic raw materials (5) enter the raw material processing module (1) through the feed inlet (11) of the raw material processing module. Here, organic raw materials such as biomass, agricultural straws, organic garbage, and organic solid wastes are dried, heated, compressed, cut, granulated, etc. The outlet (12) of the raw material processing module is connected to the raw material feeding device (22) of the iron bath gasifier (20), and the pre-treated organic raw materials enter the iron bath gasifier module (2) therefrom. The gas outlet (25) of the iron bath gasifier (20) is connected to the high-temperature medium inlet (31) of the heat exchange module (3); the high-temperature medium outlet (32) of the heat exchange module (3) is connected to the inlet of the next process. The syngas passing through the heat exchange module can be cooled to the temperature required for the next production link, and at the same time, the heat is not wasted but used to heat the low-temperature medium end and other fluid working media required by this process. At least a water source is connected to the low-temperature medium inlet (33) of the heat exchange module (3), and high-temperature steam is generated by absorbing heat in the heat exchange module; the low-temperature medium outlet (34) of the heat exchange module (3) is connected to the SOEC inlet (41). Compared with the ALK alkaline electrolytic cell and the PEM proton exchange electrolytic cell, the SOEC solid oxide electrolytic cell has two major advantages: 1. The SOEC electrolytic cell using the oxygen ion conduction method can use not only water but also carbon dioxide as raw materials; 2. The SOEC electrolytic cell can couple heat energy, that is, if the temperature of its raw materials is high, the electric energy required to electrolyze the same amount of raw materials will be correspondingly reduced. After coupling the heat source, its energy consumption is much lower than that of the ALK electrolytic cell and the PEM electrolytic cell. The present utility model precisely utilizes the above two points to perfectly utilize the large amount of heat energy generated by the iron bath gasifier module (2) and the possible excess carbon dioxide through the SOEC electrolytic cell module (3), making the entire system more efficient and improving the output investment ratio. The SOEC cathode outlet (42) is at least connected to the high-temperature medium outlet (32) of the heat exchange module (3) and then connected to the inlet of the next process. If the syngas produced by the system is used for methanol synthesis, the ratio of CO and H2 in the syngas produced after biomass pyrolysis is inappropriate and a large amount of hydrogen needs to be supplemented. The hydrogen produced at the SOEC cathode is used to increase the proportion of hydrogen in the syngas, and the amount of supplementation is related to the organic raw materials used. The SOEC anode outlet (43) is connected to the oxygen blowing device (23) of the iron bath gasifier (20). The oxygen produced at the anode of the SOEC electrolytic cell is exactly the gasifying agent and heat supplement agent required by the iron bath gasifier (20). In this way, the oxygen production equipment required for the iron bath gasifier (20) in the conventional process is omitted. Therefore, the equipment of the present utility model perfectly combines the iron bath gasifier and the SOEC electrolytic cell through a heat exchange device, fully utilizes their respective products, provides raw materials or energy required for each other, reduces the equipment investment, and improves the utilization efficiency of raw materials and energy.

[0006] Preferably, a wind power or photovoltaic unit (6) is provided, which can provide all the electrical energy sources for the SOEC, or the wind power or photovoltaic unit (6) can also be used as a supplement to the grid power supply. If the wind power or photovoltaic unit (6) provides all the electrical energy sources for the SOEC, the syngas produced by this process is completely green syngas, and neither the raw materials nor the energy required for gas production consumes fossil fuels.

[0007] Furthermore, a waste heat recovery device (29) is provided in the iron bath gasification furnace module (2). Generally, the temperature of the preliminary syngas in the gas outlet (25) of the iron bath gasification furnace (20) can reach about 1400 °C, while the steam temperature that can be coupled by the SOEC is about 600 °C. After removing the amount of steam required by the SOEC, if there is still a surplus of the thermal energy of the preliminary syngas provided by the iron bath gasification furnace (20), a waste heat recovery device (29) can be provided in the iron bath gasification furnace module (2). The waste heat recovery device (29) can be a gasification flue installed at the gas outlet (25) of the iron bath gasification furnace (20). Water enters the gasification cooling flue to form high-temperature steam, taking away part of the flue gas heat. The heat recovered by this part of the steam can be transported to the raw material treatment module (1) to dry and heat the organic raw materials.

[0008] Furthermore, the SOEC electrolyzer module (2) is composed of multiple small-power stacks connected in parallel, and its total power can cover the power generation peak of the wind power or photovoltaic unit (6). The number of switches of the small-power stacks is determined by the instantaneous power generation of the wind power or photovoltaic unit (6). Since the power generation of wind power and photovoltaic units is not stable, a single electrolytic cell (stack) of the SOEC has certain requirements for the power change range and also has a certain delay in the response speed. Once the current power change range or change rate exceeds the tolerable range of the SOEC, it will cause the SOEC equipment to malfunction or even be damaged. Therefore, in the design, one technical route is to consider the maximum power generation of the wind power or photovoltaic unit and connect multiple small-power stacks in parallel so that it can meet the demand for the maximum power generation. Adjust the number of stacks in the working state according to the change in power generation, and convert the energy into products completely without damaging the SOEC equipment. Or an ALK or PEM electrolyzer can be provided simultaneously and connected in parallel with the SOEC electrolyzer to supply gas to the iron bath gasification furnace module and the product end. This is because different types of electrolyzers with different principles have different tolerances for the power change range and response speed of the current, and each has its own advantages and disadvantages, and can be selected and matched according to actual needs.

[0009] Furthermore, after the cathode outlet (42) and the anode outlet (43), a cathode gas storage device (71) and an oxygen storage device (72) are provided to store the gases exceeding the requirements of the iron bath gas generator. When needed, for example, when the power generation enters the trough and the SOEC is restricted by electric energy and the produced gases cannot meet the usage of the iron bath gas generator module (2), the stored gases are released. Of course, even if the volatility of the power generation of wind power or photovoltaic units is not considered, gas storage devices can be set. Once there is a temporary shutdown of equipment on the entire process line, the gas storage devices can serve as a buffer, allowing the SOEC to continue working without stopping, ensuring production efficiency and increasing the applicability of the entire process line.

[0010] Another method to overcome the instability of the power generation of wind power and photovoltaic units is to provide an electricity storage device (61). The capacity of the electricity storage device (61) is such that when the wind power or photovoltaic unit (6) generates electricity at its peak, the excess electricity required by the SOEC electrolyzer module (4) is stored and released for use when needed.

[0011] Furthermore, the SOEC can be of the proton type or the oxygen ion conduction type. According to the requirements of subsequent processes, if the ratio of CO and H2 in the preliminary synthesis gas produced by the iron bath gas generator is inappropriate, for example, if it is necessary to increase the proportion of CO, then the SOEC may need to absorb additional CO2 to produce the required CO for conditioning. If the low-temperature medium inlet (33) of the heat exchange module (3) is connected to a carbon dioxide source, then the oxygen ion conduction type SOEC must be selected. If the synthesis gas requires a certain high pressure, the proton type SOEC is more suitable.

[0012] Furthermore, if the oxygen ion conduction type SOEC electrolyzer module (4) is used, a carbon dioxide separation device (8) is provided after the high-temperature medium outlet (32) of the heat exchange module (3), and its carbon dioxide outlet (81) is connected to the low-temperature medium inlet (33) of the heat exchange module (3). In some cases, the gas produced by the iron bath gas generator may contain not only CO and H2 but also a certain proportion of CO2. If it is necessary to reduce or eliminate CO2, then after the synthesis gas is cooled by the heat exchange module (3), a separation device such as a molecular sieve is used to separate it. The separated CO2 can be returned to the oxygen ion conduction type SOEC as a raw material. Preferably, it first enters the low-temperature medium inlet (33) of the heat exchange module (3) to couple with the waste heat of the preliminary synthesis gas, and then enters the cathode of the oxygen ion conduction type SOEC for electrolysis.

[0013] Furthermore, a branch can be connected after the SOEC cathode outlet (42) and / or the SOEC anode outlet (43) to supply gas to the external network.

[0014] It should be noted that this utility model only describes the creative parts of the solution. When the medium flows between modules, according to specific circumstances, control, dust removal, dehydration, condensation, pressure addition / reduction and other treatments may be required. The corresponding valves, dust removal equipment, condensation equipment, dehydration equipment, pressure addition blower / compressor, pressure reducing valve group and other equipment are all conventional equipment in industrial production and will not be discussed in detail in this solution.

[0015] The present invention perfectly combines an iron bath gasifier and an SOEC electrolyzer through a heat exchange device, fully utilizes their respective products, provides raw materials or energy required for each other, reduces equipment investment, improves the utilization efficiency of raw materials and energy, and achieves the effect of green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the equipment process flow of Embodiment 1

[0017] Figure 2 is a schematic diagram of the equipment process flow of Embodiment 2

[0018] Figure 3 is a schematic diagram of the equipment process flow of Embodiment 3

[0019] 1 - Raw material treatment module 11 - Feed inlet of raw material treatment module 12 - Outlet of raw material treatment module 2 - Iron bath gasifier module 20 - Iron bath gasifier 21 - Molten iron inlet 22 - Raw material feeding device 23 - Oxygen blowing device 24 - Slag discharge port 25 - Gas outlet 26 - Molten iron pool 27 - Slag pool 28 - Molten iron outlet 29 - Waste heat recovery device 3 - Heat exchange module 31 - High-temperature medium inlet 32 - High-temperature medium outlet 33 - Low-temperature medium inlet 34 - Low-temperature medium outlet 4 - SOEC electrolyzer module 41 - SOEC inlet 42 - SOEC cathode outlet 43 - SOEC anode outlet 5 - Organic raw material 6 - Wind power or photovoltaic unit 61 - Electricity storage device 71 - Cathode gas storage device 72 - Oxygen storage device 8 - Carbon dioxide separation device 81 - Carbon dioxide outlet DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiment 1

[0021] The following is combined with Figure 1Describe a gas production device coupling an iron bath with SOEC in Example 1, which is provided with a raw material processing module 1. The outlet 12 of the raw material processing module is connected to the raw material feeding device 22 of the iron bath gas production furnace module 2. The iron bath gas production furnace module 2 is also provided with an iron water inlet 21, an oxygen blowing device 23, a slag discharge port 24, and a gas outlet 25. The gas outlet 25 of the iron bath gas production furnace module 2 is connected to the high-temperature medium inlet 31 of the heat exchange module 3. The high-temperature medium outlet 32 of the heat exchange module 3 is connected to the inlet of the synthetic methanol process. The water source is connected to the low-temperature medium inlet 33 of the heat exchange module 3. The low-temperature medium outlet 34 of the heat exchange module 3 is connected to the SOEC inlet 41. The SOEC cathode outlet 42 is connected to the high-temperature medium outlet 32 of the heat exchange module 3, and then to the inlet of the synthetic methanol process. The SOEC anode outlet 43 is connected to the oxygen blowing device 23 of the iron bath gas production furnace module 2. At the same time, a branch is provided at the SOEC anode outlet 43 and is connected to the external network.

[0022] For the iron bath gas production furnace module 2, iron water is added into the furnace through the iron water inlet 21 provided on it to form an iron water pool 26. The organic raw material 5 is agricultural straw, which enters the raw material processing module 1 through the raw material feeding port 11 of the raw material processing module. Here, it is dried, compressed, granulated, and heated. The pre-treated straw particles enter the iron water pool 26 of the iron bath gas production furnace module 2 through the raw material feeding device 22. Here, the straw particles absorb heat and rapidly crack into carbon, H2, and inorganic salt slag under the high temperature of the iron bath. The inorganic salt slag forms a slag pool 27 and is finally discharged through the slag discharge port 24. Oxygen is sent into the slag pool near the iron water pool 26 by the oxygen blowing device 23, where it reacts with the carbon infiltrated into the iron water and the carbon in the slag layer. Due to the control of the oxygen amount, only CO is generated in the reaction. The generated H2 and CO are discharged from the gas outlet 25 of the iron bath gas production furnace module 2 and enter the heat exchange module 3 through the high-temperature medium inlet 31. The water source is connected to the low-temperature medium inlet 33 of the heat exchange module 3. The preliminary syngas of the iron bath gas production furnace exchanges heat with the water supplied by the water source in the heat exchange module 3, and the temperature of the preliminary syngas is reduced to a temperature slightly higher than the temperature required for synthesizing methanol; the water absorbs heat in the heat exchange module to generate high-temperature steam. After the preliminary syngas is discharged from the high-temperature medium outlet 32, it is mixed with the H2 produced by the SOEC cathode in proportion, and the temperature is further reduced to the temperature required for the synthetic methanol process to form the final syngas and enter the inlet of the synthetic methanol process. The high-temperature steam is discharged from the low-temperature medium outlet 34 of the heat exchange module 3 and enters the SOEC electrolytic cell through the SOEC inlet 41. The water steam coupled with thermal energy requires much lower energy consumption for electrolysis than the ALK alkaline electrolytic cell and the PEM electrolytic cell. The H2 discharged from the SOEC cathode outlet 42 is mixed and conditioned with the preliminary syngas of the iron bath gas production furnace after heat exchange to form the final syngas and enter the synthetic methanol process. The oxygen discharged from the SOEC anode outlet 43, a part of it enters the iron water pool 26 and the slag pool 27 of the iron bath gas production furnace through the oxygen blowing device 23; the excess part is supplied to the external network.

[0023] Example 2

[0024] The following is combined with Figure 2 to illustrate a gas production device of an iron bath coupled with SOEC in Example 2. The difference from Example 1 is that a wind power or photovoltaic unit 6 is set up in parallel with the power grid to jointly supply power to the SOEC electrolytic cell module 4. At the same time, a cathode gas storage device 71 and an oxygen storage device 72 are respectively provided after the SOEC cathode outlet 42 and the SOEC anode outlet 43, and branches for supplying gas to the external network are respectively provided.

[0025] Example 3

[0026] The following is combined with Figure 3 to illustrate a gas production device of an iron bath coupled with SOEC in Example 3. The difference from Example 1 is that a wind power or photovoltaic unit 6 is set up to supply power to the SOEC electrolytic cell module 4, and a power storage device 61 is provided; at the same time, the low-temperature medium water vapor (H2O) can be branched to supply the external network after coming out from the low-temperature medium outlet 34 of the heat exchange module 3. The SOEC electrolytic cell module 4 is of an oxygen ion conduction type and can electrolyze CO2. At this time, a heat exchange pipeline for CO2 is additionally provided in the heat exchange module 3, and a CO2 gas source can be set to be connected to the low-temperature medium inlet 33 of the heat exchange module 3. Since the electrolysis rate of CO2 by SOEC cannot reach 100%, and the preliminary synthesis gas generated by the iron bath gas production furnace module 2 may also be mixed with a certain proportion of CO2, a carbon dioxide separation device 8 is provided before entering the methanol synthesis process. The gas from the SOEC cathode outlet 42 is mixed with the heat-exchanged preliminary synthesis gas and enters the carbon dioxide separation device 8. The separated CO2 is discharged from the carbon dioxide outlet 81. Part of it enters the low-temperature medium inlet 33 again as a raw material, and the other part is discharged from the system to prevent the enrichment of CO2 in the system. The final synthesis gas from which CO2 has been removed enters the methanol synthesis process.

[0027] A waste heat recovery device 29 is provided in the iron bath gas production furnace module 2. Specifically, it is a gasification flue installed at the gas outlet (25) of the iron bath gas production furnace (20). Water enters the gasification cooling flue to form high-temperature steam, and this part of the steam is transported to the raw material treatment module (1) to dry and heat the organic raw materials.

Claims

1. A gas production device integrating an iron bath with SOEC, comprising a raw material processing module (1), characterized in that: There is an iron bath gasification furnace module (2), a heat exchange module (3), and an SOEC electrolytic cell module (4); The main equipment of the iron bath gasification furnace module (2) is an iron bath gasification furnace (20). Inside the iron bath gasification furnace (20), an iron water pool (26) and a slag pool (27) are arranged from bottom to top; an iron water inlet (21) is provided on the furnace body corresponding to the iron water pool (26); an iron water outlet (28) is provided on the furnace body at the bottom of the iron water pool (26); a raw material feeding device (22) is provided on the furnace body of the iron bath gasification furnace (20); a slag discharge port (24) is provided on the furnace body of the iron bath gasification furnace (20); an oxygen blowing device (23) is provided in the iron bath gasification furnace (20); an air outlet (25) is provided in the iron bath gasification furnace (20); The outlet (12) of the organic raw material treatment module is connected to the raw material feeding device (22) of the iron bath gasification furnace (20); the air outlet (25) of the iron bath gasification furnace (20) is connected to the high-temperature medium inlet (31) of the heat exchange module (3); the high-temperature medium outlet (32) of the heat exchange module (3) is connected to the inlet of the next process; at least a water source is connected to the low-temperature medium inlet (33) of the heat exchange module (3); the low-temperature medium outlet (34) of the heat exchange module (3) is connected to the SOEC inlet (41); the SOEC cathode outlet (42) is at least connected to the high-temperature medium outlet (32) of the heat exchange module (3), and then connected to the inlet of the next process; the SOEC anode outlet (43) is connected to the oxygen blowing device (23) of the iron bath gasification furnace (20).

2. The gas production device of an iron bath-coupled SOEC according to claim 1, characterized in that: A wind power or photovoltaic unit (6) is provided, which can provide all the electrical energy sources for the SOEC, or the wind power or photovoltaic unit (6) can also be used as a supplement to the grid power supply.

3. The gas production device of a molten iron bath-coupled SOEC according to claim 1, characterized in that: A waste heat recovery device (29) is provided in the iron bath gasification furnace module (2). The waste heat recovery device (29) can be a gasification flue installed at the air outlet (25) of the iron bath gasification furnace (20), and the recovered heat can be transported to the raw material treatment module (1) to dry and heat the organic raw materials.

4. The gas production equipment of a molten iron bath-coupled SOEC according to claim 2, characterized in that: The SOEC electrolytic cell module (4) is composed of multiple small-power stacks connected in parallel, and its total power can cover the power generation peak of the wind power or photovoltaic unit (6). The number of switches of the small-power stacks is determined by the instantaneous power generation of the wind power or photovoltaic unit (6).

5. The gas production device of an iron bath-coupled SOEC according to claim 1 or 2, characterized in that: After the cathode outlet (42) and the anode outlet (43), a cathode gas storage device (71) and an oxygen storage device (72) are provided to store the gases exceeding the requirements of the iron bath gasification furnace and release them for use when needed.

6. The gas production device of an iron bath coupled with SOEC according to claim 2, characterized in that: A power storage device (61) is provided. The capacity of the power storage device (61) meets the requirement of storing the electricity exceeding the requirements of the SOEC electrolytic cell module (4) during the power generation peak of the wind power or photovoltaic unit (6) and releasing it for use when needed.

7. The gas production equipment of an iron bath-coupled SOEC according to claim 1, characterized in that: The SOEC electrolytic cell module (4) can be of the proton method or the oxygen ion conduction method.

8. The gas production device of an iron bath-coupled SOEC according to claim 1 or 7, characterized in that: If the oxygen ion conduction method is adopted, the low-temperature medium inlet (33) of the heat exchange module (3) can be connected to a carbon dioxide source.

9. The gas production device of an iron bath coupled with SOEC according to claim 1 or 7, characterized in that: If the oxygen ion conduction method is adopted, a carbon dioxide separation device (8) is provided after the high-temperature medium outlet (32) of the heat exchange module (3), and its carbon dioxide outlet (81) is connected to the low-temperature medium inlet (33) of the heat exchange module (3).

10. The gas production equipment of an iron bath-coupled SOEC according to claim 1, characterized in that: A branch can be connected after the SOEC cathode outlet (42) and / or the SOEC anode outlet (43) to supply gas to the external network.

11. The gas production device of an iron bath-coupled SOEC according to claim 1, characterized in that: An ALK alkaline electrolytic cell or a PEM proton exchange membrane electrolytic cell can be provided simultaneously and connected in parallel with the SOEC electrolytic cell to supply gas to the iron bath gas generation furnace module and the product end.

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