A device and method for extracting hydrogen from industrial off-gas

Abstract

The present application belongs to the technical field of extraction and utilization of high-value components in industrial tail gas, and discloses a device and method for extracting hydrogen from industrial tail gas. The device comprises a heat exchanger, a high-temperature-resistant ceramic cylinder, a direct-current power supply and a cooler. Water vapor is used as a carrier gas to carry out the prepared hydrogen, which can reduce the electrolysis voltage and the power consumption for extracting hydrogen. The method of applying an external voltage is used to provide the driving force for hydrogen extraction, which can extract hydrogen from tail gas with low hydrogen concentration and improve the utilization rate of hydrogen resources. The device and method for extracting hydrogen from low-hydrogen-content high-temperature industrial tail gas are provided to solve the problem that hydrogen cannot be directly extracted from high-temperature industrial tail gas with low hydrogen concentration, resulting in a large amount of hydrogen resource waste. The device and method can directly extract hydrogen from high-temperature industrial tail gas with low hydrogen content by using high-temperature proton conductor ceramics, and water vapor is used as a carrier gas to carry the extracted hydrogen, which can reduce the power consumption for extracting hydrogen and efficiently prepare high-purity hydrogen.

Description

Technical Field

[0001] This invention relates to the field of high-value component extraction and utilization technology from industrial exhaust gas, and in particular to an apparatus and method for extracting hydrogen from industrial exhaust gas. Background Technology

[0002] Hydrogen-containing tail gases are generated during the production processes of synthetic ammonia, chlor-alkali, and metallurgical industries. For example, the hydrogen content in the exhaust gas and purge gas of synthetic ammonia is 8% to 50%, while the hydrogen content in coke oven gas is as high as 50% to 60%. Direct emission of these gases will cause safety hazards, and the combustion of these tail gases will also lead to the waste of hydrogen resources and energy. Therefore, it is necessary to effectively recover hydrogen from industrial tail gases.

[0003] Currently, some synthetic ammonia, chlor-alkali, and coking enterprises use pressure swing adsorption (PSA) and membrane separation methods to extract hydrogen from industrial tail gases. PSA extracts hydrogen by utilizing the characteristic that the amount of hydrogen adsorbed by an adsorbent changes with pressure. It uses an adsorbent bed and periodically changes the pressure of the bed to control the amount of hydrogen adsorbed on the adsorbent, thus achieving hydrogen separation. However, PSA is only suitable for separating high-hydrogen-concentration carbon dioxide. H2 The presence of over 50% hydrogen-rich gas, coupled with a hydrogen recovery rate of less than 80%, makes it difficult to recover a significant amount of hydrogen resources. Membrane separation, which uses polymeric organic fiber membranes to separate hydrogen, allows hydrogen to pass through the membrane under pressure, but other impurities can also pass through, resulting in low-purity separated hydrogen that cannot be used directly. Furthermore, the economically viable range for treating tail gas using membrane separation requires a hydrogen concentration C. H2 With a hydrogen concentration >30%, it is difficult to process tail gas with low hydrogen concentration. Besides pressure swing adsorption (PSA) and membrane separation, cryogenic separation can also extract hydrogen. Cryogenic separation is a method that involves compressing and cooling the gaseous feedstock, then using the difference in boiling points of different gases for distillation. This method is energy-intensive, requires significant investment, and cannot produce high-purity hydrogen, making it difficult to meet practical application needs.

[0004] Current pressure swing adsorption (PSA) and membrane separation methods are suitable for treating room temperature exhaust gases, while industrial exhaust gases have a wide temperature range. For example, ammonia formation exhaust gases can reach 400-500℃, and coke oven gas can reach 800℃. Using PSA and membrane separation to treat high-temperature exhaust gases requires cooling before extraction, resulting in a long processing flow and significant waste of exhaust gas heat.

[0005] In summary, due to the limitations of existing industrial waste gas hydrogen extraction technology, a large amount of hydrogen resources are wasted, resulting in low energy and resource utilization rates. Summary of the Invention

[0006] The technical problem this invention aims to solve is the inefficient recovery of hydrogen from high-temperature industrial tail gases with low hydrogen concentrations. It provides a device and method for extracting hydrogen from industrial tail gases across a wide range of hydrogen concentrations and temperatures. This method can extract hydrogen from low-concentration industrial tail gases and operate stably at high temperatures without the need for tail gas cooling. This invention utilizes proton-conducting ceramics, which exhibit hydrogen ion conductivity at high temperatures and are resistant to high temperatures and corrosion, to directly extract hydrogen, achieving efficient recovery of hydrogen from high-temperature industrial tail gases. Furthermore, the electrochemical hydrogen extraction device assembled using proton-conducting ceramics can extract hydrogen from high-temperature industrial tail gases with low hydrogen content. The reaction and Nernst equation are as follows: H2 (exhaust gas) = ​​H2 (hydrogen gas) The higher the hydrogen partial pressure on the exhaust side and the lower the hydrogen partial pressure on the hydrogen side, the lower the equilibrium voltage. E 平衡 The higher the hydrogen content, the stronger the driving force for spontaneous hydrogen extraction and the lower the energy consumption. However, low-hydrogen-content tail gas has a low hydrogen content and produces high-purity hydrogen, resulting in high energy consumption for hydrogen extraction from low-hydrogen tail gas. This invention proposes introducing water vapor as a carrier gas on the hydrogen side to reduce the hydrogen partial pressure, thereby reducing energy consumption. Simultaneously, the water vapor carrier gas can be separated from the hydrogen after condensation to obtain high-purity hydrogen, and the water can be recycled, achieving efficient hydrogen extraction from low-hydrogen-content industrial tail gas.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a hydrogen extraction device from industrial exhaust gas, comprising: a heat exchanger, a high-temperature resistant ceramic cylinder, a DC power supply, and a cooler; The heat exchanger is provided with a high-temperature exhaust gas inlet, a high-temperature exhaust gas outlet, a water inlet, and a steam outlet; the high-temperature exhaust gas inlet and the high-temperature exhaust gas outlet are located at the bottom and top of the same side of the heat exchanger, respectively; the water inlet and the steam outlet are located at the bottom and top of the other side of the heat exchanger, respectively; the outer surface of the heat exchanger is covered with heat exchanger insulation material. The high-temperature resistant ceramic cylinder is provided with a cylinder inlet, an exhaust outlet, a water vapor inlet, and a hydrogen-water mixture outlet; the outer surface of the high-temperature resistant ceramic cylinder is covered with heat-insulating material; a hydrogen separation functional ceramic plate is set inside the high-temperature resistant ceramic cylinder, dividing the interior of the high-temperature resistant ceramic cylinder into two chambers, namely an exhaust gas chamber and a hydrogen chamber; the cylinder inlet and exhaust outlet are respectively located on the side where the exhaust gas chamber is located; the water vapor inlet and the hydrogen-water mixture outlet are located on the side where the hydrogen chamber is located; The high-temperature exhaust outlet is connected to the cylinder intake port via a pipeline; the water vapor outlet is connected to the water vapor intake port via a pipeline. The cooler is provided with a hydrogen-water mixture inlet, a hydrogen outlet, and a cooling water outlet; the hydrogen-water mixture outlet is connected to the hydrogen-water mixture inlet via a pipeline; the cooling water outlet is connected to the water inlet. The positive and negative terminals of the DC power supply are respectively connected to the two sides of the hydrogen separation functional ceramic plate.

[0008] The hydrogen separation functional ceramic plate is a three-layer structure consisting of a porous electrode for exhaust gas, a dense proton conductor ceramic, and a porous electrode for hydrogen gas, all tightly connected. A high-temperature sealant is used to seal the hydrogen separation functional ceramic plate in the middle of a high-temperature resistant ceramic cylinder, separating the exhaust gas cavity from the hydrogen gas cavity. The high-temperature adhesive is one of the following commercially available high-temperature adhesives: water glass, phosphate, or alumina matrix.

[0009] High-temperature industrial exhaust gas enters the heat exchanger through the high-temperature exhaust gas inlet, and enters the exhaust gas cavity through the high-temperature exhaust gas outlet and the cylinder inlet; the exhaust gas outlet is arranged on the opposite side of the cylinder inlet; the exhaust gas electrode lead penetrates the insulation material and the high-temperature resistant ceramic cylinder and is connected to the exhaust gas porous electrode. The steam inlet and the hydrogen-water mixture outlet are respectively connected to the hydrogen cavity; one end of the hydrogen electrode lead penetrates the insulation material and the high-temperature resistant ceramic cylinder and is connected to the porous hydrogen electrode. The other end of the exhaust gas electrode lead and the other end of the hydrogen electrode lead are connected to the positive and negative terminals of a DC power supply, respectively.

[0010] The dense proton conductor ceramic is made of BaCe. 0.5 Zr 0.3 Y 0.2 O 3-α Proton conductor ceramic materials or BaCe 0.5 Hf 0.3 Y 0.2 O 3-α Proton conductor ceramic material; both the exhaust gas porous electrode and the hydrogen gas porous electrode are Ni-BaCe. 0.5 Zr 0.3 Y 0.2 O 3-α Porous metal ceramics or Ni-BaCe 0.5 Hf 0.3 Y 0.2 O 3-α Porous metallic ceramics.

[0011] The heat exchanger and cooler are made of one of the following materials: corundum, quartz, zirconium oxide, and magnesium oxide. The high-temperature exhaust gas inlet, high-temperature exhaust gas outlet, water inlet, and water vapor outlet are made of one of the following materials: corundum, quartz, zirconium oxide, and magnesium oxide. The heat exchanger insulation material is made of alumina fiber and / or zirconium oxide fiber.

[0012] The high-temperature resistant ceramic cylinder is made of one of the following materials: corundum, quartz, zirconium oxide, and magnesium oxide.

[0013] The cylinder inlet, exhaust outlet, hydrogen-water mixture outlet, cooling water outlet, and hydrogen outlet are made of one of the following materials: corundum, zirconium oxide, and magnesium oxide.

[0014] The exhaust gas electrode lead and the hydrogen electrode lead are made of one or more alloys of nickel, silver, and platinum, or stainless steel. The DC power supply is a constant voltage and constant current DC power supply.

[0015] A method for extracting hydrogen from industrial exhaust gas includes the following steps: S1: Water is introduced into the water inlet of the heat exchanger; high-temperature exhaust gas is introduced into the high-temperature exhaust gas inlet of the heat exchanger. S2: The heat exchanger heats up due to the introduction of high-temperature exhaust gas, and the heat is transferred to the water side, generating water vapor. S3: High-temperature water vapor in the heat exchanger is introduced into the hydrogen cavity through the water vapor outlet and water vapor inlet; S4: The high-temperature exhaust gas in the heat exchanger is introduced from the high-temperature exhaust gas outlet into the cylinder inlet and then into the exhaust gas cavity. S5: DC power supply applies DC voltage to the hydrogen separation functional ceramic plate; S6: Water vapor carrying the prepared hydrogen gas exits from the hydrogen-water mixture inlet and enters the cooler; residual tail gas exits from the tail gas outlet. S7: Water vapor condenses in the cooler to produce water, which is then circulated through the cooling water outlet to the heat exchanger water inlet. The remaining gas is the produced hydrogen.

[0016] The DC voltage is 0.5V~15V.

[0017] The hydrogen component in the high-temperature exhaust gas is 0.5% to 90%, and the temperature is 100℃ to 1200℃.

[0018] Driven by the electrochemical reaction of hydrogen extraction, hydrogen gas generates hydrogen ions (protons) at the interface between the porous electrode of the tail gas and the dense proton conductor ceramic. Driven by the external electric field, the protons migrate from the dense proton conductor ceramic to the interface between the porous electrode of hydrogen gas and the dense proton conductor ceramic to generate hydrogen gas, as in reaction (1).

[0019] H2 (exhaust gas cavity) = H2 (hydrogen gas cavity) (1) The Nernst equation for reaction (1) is equation (2): (2) in, For the Gibbs free energy change of reaction (1), J; The standard Gibbs free energy change of reaction (1) is J; R The gas constant is 8.314 J / (mol·K); T K represents absolute temperature. The hydrogen partial pressure in the hydrogen cavity is expressed in atm. The hydrogen partial pressure in the exhaust cavity is measured in atm. F The value is Faraday's constant, 96487 C / mol; Let V be the electromotive force of the battery reaction. For reaction (1), no phase transition occurs before and after the reaction. It is 0.

[0020] After rearranging equation (2), we can obtain equation (3): (3) For example, S5, with an external DC voltage. E 外加 Subsequently, the hydrogen ion current in the hydrogen separation functional ceramic plate 7 I Equation (4); (4) in, The irreversible voltage (V) for the hydrogen electrochemical reaction is given. The overpotential for hydrogen extraction is V; R The resistance of the hydrogen separation functional ceramic plate 7 is given in Ω. The higher the applied reaction temperature, the greater the hydrogen ion current in the hydrogen separation functional ceramic plate 7. I The higher the rate, the higher the hydrogen extraction rate. J The faster, as in equation (5).

[0021] (5) hydrogen extraction rate J The unit is mol / s.

[0022] The beneficial effects of adopting the above technical solution are as follows: 1. By using an external voltage method to provide the driving force for hydrogen extraction, hydrogen can be extracted from tail gas with low hydrogen concentration, thus improving the utilization rate of hydrogen resources.

[0023] 2. Using water vapor as a carrier gas to carry out the produced hydrogen can reduce the electrolysis voltage and the energy consumption for hydrogen extraction.

[0024] 3. Hydrogen gas can be separated from water vapor gas after condensation, and water resources can be recycled.

[0025] 4. The exhaust gas and hydrogen are separated by a hydrogen separation ceramic plate, resulting in high-purity extracted hydrogen.

[0026] 5. This invention does not require cooling and can directly extract hydrogen from high-temperature exhaust gas, resulting in low extraction costs. Attached Figure Description

[0027] Figure 1 A schematic diagram of a hydrogen extraction device from industrial exhaust gas provided in an embodiment of the present invention; Figure 2 A schematic diagram of a heat exchanger provided in an embodiment of the present invention; Figure 3 A schematic diagram of a high-temperature resistant ceramic cylinder provided in an embodiment of the present invention; Figure 4 A schematic diagram of a cooler provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of a ceramic plate for hydrogen separation.

[0028] In the diagram, 1. Heat exchanger, 2. High-temperature exhaust gas inlet, 3. High-temperature exhaust gas outlet, 4. Water inlet, 5. Water vapor outlet, 6. Heat exchanger insulation material, 7. Hydrogen separation functional ceramic plate, 8. High-temperature resistant ceramic cylinder, 9. Insulation material, 10. Cylinder inlet, 11. Exhaust gas electrode lead, 12. Hydrogen electrode lead, 13. DC power supply, 14. Hydrogen cavity, 15. Hydrogen-water mixture outlet, 16. Exhaust gas cavity, 17. Exhaust gas outlet, 18. Water vapor inlet, 21. Hydrogen-water mixture inlet, 22. Cooler, 23. Hydrogen outlet, 24. Cooling water outlet, 32. Porous exhaust gas electrode, 31. Dense proton conductor ceramic, 33. Porous hydrogen electrode. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0030] This embodiment uses a hydrogen extraction device from industrial exhaust gas. The device includes: a heat exchanger 1, a high-temperature resistant ceramic cylinder 8, a DC power supply 13, and a cooler 22. The heat exchanger 1 is provided with a high-temperature exhaust gas inlet 2, a high-temperature exhaust gas outlet 3, a water inlet 4, and a steam outlet 5. The high-temperature exhaust gas inlet 2 and the high-temperature exhaust gas outlet 3 are located at the bottom and top of the same side of the heat exchanger 1, respectively. The water inlet 4 and the steam outlet 5 are located at the bottom and top of the other side of the heat exchanger 1, respectively. The outer surface of the heat exchanger 1 is covered with heat exchanger insulation material 6. The high-temperature resistant ceramic cylinder 8 is provided with a cylinder inlet 10, an exhaust outlet 17, a steam inlet 18, and a hydrogen-water mixture outlet 15; the outer surface of the high-temperature resistant ceramic cylinder 8 is covered with heat-insulating material 9; a hydrogen separation functional ceramic plate 7 is disposed inside the high-temperature resistant ceramic cylinder 8, dividing the interior of the high-temperature resistant ceramic cylinder 8 into two chambers, namely an exhaust cavity 16 and a hydrogen cavity 14; the cylinder inlet 10 and the exhaust outlet 17 are respectively disposed on the side where the exhaust cavity 16 is located; the steam inlet 18 and the hydrogen-water mixture outlet 15 are disposed on the side where the hydrogen cavity 14 is located; The high-temperature exhaust gas outlet 3 is connected to the cylinder inlet 10 via a pipeline; the water vapor outlet 5 is connected to the water vapor inlet 18 via a pipeline. The cooler 22 is provided with a hydrogen-water mixture inlet 21, a hydrogen outlet 23 and a cooling water outlet 24; the hydrogen-water mixture outlet 15 is connected to the hydrogen-water mixture inlet 21 through a pipeline; the cooling water outlet 24 is connected to the water inlet 4. The positive and negative terminals of the DC power supply 13 are respectively connected to the two sides of the hydrogen separation functional ceramic plate 7.

[0031] The hydrogen separation functional ceramic plate 7 is a three-layer structure consisting of a porous tail gas electrode 32, a dense proton conductor ceramic 31, and a porous hydrogen electrode 33, which are tightly connected. The high-temperature industrial tail gas enters the heat exchanger 1 through the high-temperature tail gas inlet 2, and enters the tail gas cavity 16 through the high-temperature tail gas outlet 3 and the cylinder inlet 10. The tail gas outlet 17 is arranged on the opposite side of the cylinder inlet 10. The tail gas electrode lead 11 penetrates the insulation material 9 and the high-temperature resistant ceramic cylinder 8 and connects to the porous tail gas electrode 32. The water vapor inlet 18 and the hydrogen-water mixture outlet 15 are respectively connected to the hydrogen cavity 14; one end of the hydrogen electrode lead 12 penetrates the heat insulation material and the high-temperature resistant ceramic cylinder 8 and is connected to the hydrogen porous electrode 33. The other end of the exhaust gas electrode lead 11 and the other end of the hydrogen electrode lead 12 are respectively connected to the positive and negative terminals of the DC power supply 13.

[0032] The heat exchanger 1 and cooler 22 are made of corundum.

[0033] The high-temperature exhaust gas inlet 2, high-temperature exhaust gas outlet 3, water inlet 4, and water vapor outlet 5 are made of corundum.

[0034] The hydrogen separation functional ceramic plate 7 comprises a three-layer structure consisting of a porous tail gas electrode 32, a dense proton conductor ceramic 31, and a porous hydrogen electrode 33, all tightly connected. The dense proton conductor ceramic 31 is made of BaCe. 0.5 Hf 0.3 Y 0.2 O 3-α Proton conductor ceramic material; both the exhaust gas porous electrode 32 and the hydrogen gas porous electrode 33 are Ni-BaCe 0.5 Hf 0.3 Y 0.2 O 3-α Porous metallic ceramics.

[0035] The high-temperature adhesive is a commercially available alumina-based high-temperature adhesive.

[0036] The heat exchanger insulation materials 6 and 9 are made of alumina fiber; The high-temperature resistant ceramic cylinder 8 is made of corundum.

[0037] The cylinder inlet 10, exhaust outlet 17, hydrogen-water mixture outlet 15, cooling water outlet 24, and hydrogen outlet 23 are made of corundum.

[0038] The exhaust gas electrode lead 11 and the hydrogen electrode lead 12 are made of nickel.

[0039] The DC power supply is a commercially available constant voltage and constant current DC power supply.

[0040] This embodiment also employs a hydrogen extraction device from industrial exhaust gas to extract hydrogen, including the following steps: S1: Water is introduced into the water inlet 4 of the heat exchanger; the 400℃ synthetic ammonia tail gas is introduced into the high temperature tail gas inlet 2 of the heat exchanger 1. S2: The heat exchanger 1 is heated by the introduction of high-temperature exhaust gas, and the heat is transferred to the water side to generate water vapor. S3: High-temperature steam in heat exchanger 1 is introduced into hydrogen cavity 14 through steam outlet 5 and steam inlet 18; S4: The high-temperature exhaust gas in the heat exchanger 1 is introduced from the high-temperature exhaust gas outlet 3 into the cylinder inlet 10 and then into the exhaust gas cavity 16. S5: Apply a DC voltage of 3V to the hydrogen separation functional ceramic plate 7 through DC power supply 13; S6: Water vapor carrying the prepared hydrogen gas is discharged from the hydrogen-water mixture inlet 21 and enters the cooler 22; the remaining tail gas is discharged from the tail gas outlet 17.

[0041] S7: Water vapor condenses in cooler 22, producing water, which is then circulated into heat exchanger water inlet 4 via cooling water outlet 24. The remaining gas is the produced hydrogen, with a purity of 99% and a hydrogen extraction rate of 1.2 × 10⁻⁶. -6 mol / s.

Claims

1. A device for extracting hydrogen from industrial exhaust gas, characterized in that, The hydrogen extraction device from the industrial exhaust gas includes: a heat exchanger, a high-temperature resistant ceramic cylinder, a DC power supply, and a cooler. The heat exchanger is provided with a high-temperature exhaust gas inlet, a high-temperature exhaust gas outlet, a water inlet, and a steam outlet; the high-temperature exhaust gas inlet and the high-temperature exhaust gas outlet are located at the bottom and top of the same side of the heat exchanger, respectively; the water inlet and the steam outlet are located at the bottom and top of the other side of the heat exchanger, respectively; the outer surface of the heat exchanger is covered with heat exchanger insulation material. The high-temperature resistant ceramic cylinder is provided with a cylinder inlet, an exhaust outlet, a water vapor inlet, and a hydrogen-water mixture outlet; the outer surface of the high-temperature resistant ceramic cylinder is covered with heat-insulating material; a hydrogen separation functional ceramic plate is set inside the high-temperature resistant ceramic cylinder, dividing the interior of the high-temperature resistant ceramic cylinder into two chambers, namely an exhaust gas chamber and a hydrogen chamber; the cylinder inlet and exhaust outlet are respectively located on the side where the exhaust gas chamber is located; the water vapor inlet and the hydrogen-water mixture outlet are located on the side where the hydrogen chamber is located; The high-temperature exhaust outlet is connected to the cylinder intake port via a pipeline; the water vapor outlet is connected to the water vapor intake port via a pipeline. The cooler is provided with a hydrogen-water mixture inlet, a hydrogen outlet, and a cooling water outlet; the hydrogen-water mixture outlet is connected to the hydrogen-water mixture inlet via a pipeline; the cooling water outlet is connected to the water inlet. The positive and negative terminals of the DC power supply are respectively connected to the two sides of the hydrogen separation functional ceramic plate. The hydrogen separation functional ceramic plate is a three-layer structure consisting of a porous electrode for exhaust gas, a dense proton conductor ceramic, and a porous electrode for hydrogen gas, which are tightly connected. The high-temperature industrial exhaust gas enters the heat exchanger through the high-temperature exhaust gas inlet and enters the exhaust gas cavity through the high-temperature exhaust gas outlet and the cylinder inlet. An exhaust gas outlet is arranged on the opposite side of the cylinder inlet. One end of the exhaust gas electrode lead penetrates the insulation material and the high-temperature resistant ceramic cylinder and connects to the porous electrode for exhaust gas. The steam inlet and the hydrogen-water mixture outlet are respectively connected to the hydrogen cavity; one end of the hydrogen electrode lead penetrates the insulation material and the high-temperature resistant ceramic cylinder and is connected to the porous hydrogen electrode. The other end of the exhaust gas electrode lead and the other end of the hydrogen electrode lead are connected to the positive and negative terminals of a DC power supply, respectively. The dense proton conductor ceramic is made of BaCe. 0.5 Zr 0.3 Y 0.2 O 3-α Proton conductor ceramic materials or BaCe 0.5 Hf 0.3 Y 0.2 O 3-α Proton conductor ceramic material; both the exhaust gas porous electrode and the hydrogen gas porous electrode are Ni-BaCe. 0.5 Zr 0.3 Y 0.2 O 3-α Porous metal ceramics or Ni-BaCe 0.5 Hf 0.3 Y 0.2 O 3-α Porous metallic ceramics.

2. The hydrogen extraction device from industrial tail gas according to claim 1, characterized in that, The heat exchanger and cooler are made of one of the following materials: corundum, quartz, zirconium oxide, and magnesium oxide. The high-temperature exhaust gas inlet, high-temperature exhaust gas outlet, water inlet, and water vapor outlet are made of one of the following materials: corundum, quartz, zirconium oxide, and magnesium oxide. The heat exchanger insulation material is made of alumina fiber and / or zirconium oxide fiber.

3. The hydrogen extraction device from industrial tail gas according to claim 1, characterized in that, The high-temperature resistant ceramic cylinder is made of one of the following materials: corundum, quartz, zirconium oxide, and magnesium oxide.

4. The hydrogen extraction device from industrial tail gas according to claim 1, characterized in that, The cylinder inlet, exhaust outlet, hydrogen-water mixture outlet, cooling water outlet, and hydrogen outlet are made of one of the following materials: corundum, zirconium oxide, and magnesium oxide.

5. The hydrogen extraction device from industrial tail gas according to claim 1, characterized in that, The exhaust gas electrode lead and the hydrogen electrode lead are made of one or more alloys of nickel, silver, and platinum, or stainless steel. The DC power supply is a constant voltage and constant current DC power supply.

6. A method for extracting hydrogen from industrial exhaust gas, implemented using the extraction apparatus as described in any one of claims 1-5, characterized in that, Includes the following steps: S1: Water is introduced into the water inlet of the heat exchanger; high-temperature exhaust gas is introduced into the high-temperature exhaust gas inlet of the heat exchanger. S2: The heat exchanger heats up due to the introduction of high-temperature exhaust gas, and the heat is transferred to the water side, generating water vapor. S3: High-temperature water vapor in the heat exchanger is introduced into the hydrogen cavity through the water vapor outlet and water vapor inlet; S4: The high-temperature exhaust gas in the heat exchanger is introduced from the high-temperature exhaust gas outlet into the cylinder inlet and then into the exhaust gas cavity. S5: DC power supply applies DC voltage to the hydrogen separation functional ceramic plate; S6: Water vapor carrying the prepared hydrogen gas exits from the hydrogen-water mixture inlet and enters the cooler; residual tail gas exits from the tail gas outlet. S7: Water vapor condenses in the cooler to produce water, which is then circulated through the cooling water outlet to the heat exchanger water inlet. The remaining gas is the produced hydrogen.

7. The method for extracting hydrogen from industrial exhaust gas according to claim 6, characterized in that, The DC voltage is 0.5V~15V.

8. The method for extracting hydrogen from industrial exhaust gas according to claim 6, characterized in that, The hydrogen component in the high-temperature exhaust gas is 0.5% to 90%, and the temperature is 100℃ to 1200℃.

Images