Hydrogen purification heat recovery device
By designing a hydrogen purification heat recovery device and utilizing components such as an alkaline heat exchanger to recover the heat from the high-temperature alkaline solution, the problem of heat waste in existing technologies has been solved, achieving resource conservation and reduced equipment costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU XIBEIYOU HYDROGEN ENERGY TECH CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-08
AI Technical Summary
In existing technologies, the heat from the high-temperature alkaline solution during hydrogen purification is not effectively utilized, leading to energy waste and increased equipment costs.
A hydrogen purification heat recovery device was designed. By connecting components such as an alkali heat exchanger, a hydrogen heat exchanger, a deoxygenation reactor, a drying electric heater, and a cooler, the heat of high-temperature alkali solution can be recovered and utilized, reducing the dependence on electric heaters.
It effectively recovers and utilizes the heat from high-temperature alkaline solutions, saving resources, reducing equipment costs, and simplifying logic control.
Smart Images
Figure CN224215926U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydrogen recovery technology, and in particular to a hydrogen purification heat recovery device. Background Technology
[0002] Hydrogen purification refers to the process of removing various impurities, such as oxygen, nitrogen, carbon monoxide, carbon dioxide, water vapor, and sulfides, from hydrogen containing impurities through specific methods and processes to obtain high-purity hydrogen. During hydrogen purification, operations such as adsorbent regeneration in pressure swing adsorption (PSA) and gas compression in membrane separation consume significant amounts of energy and generate heat. Heat recovery devices can collect this heat, which would otherwise be wasted, and use it to preheat feedstock gas, heat equipment, or other production processes, reducing the demand for fresh energy and lowering energy procurement costs. Therefore, a hydrogen purification heat recovery device is needed.
[0003] A hydrogen purification heat recovery device is a device that collects the heat that would otherwise be wasted during the hydrogen purification process. In existing technologies, when hydrogen is deoxygenated through a purification system, it needs to be heated to about 40°C to ensure the catalytic activity of the palladium catalyst. Conventional technologies use electric heaters to heat the hydrogen, and the heat from the high-temperature alkaline solution is not utilized. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a hydrogen purification heat recovery device, which aims to improve the problem that the heat of the high-temperature alkaline solution is not utilized when hydrogen is heated by an electric heater in conventional technology.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen purification heat recovery device, comprising an alkaline heat exchanger, wherein the alkaline heat exchanger and a hydrogen heat exchanger are connected by a pipeline, the hydrogen heat exchanger and a deoxygenation reactor are connected by a pipeline, the deoxygenation reactor and a cooler are connected by a pipeline, the cooler and a deoxygenated liquid separator are connected by a pipeline, the deoxygenated liquid separator and a second pneumatic ball valve are connected by a pipeline, the deoxygenated liquid separator and a hydrogen regulating valve are connected by a pipeline, the hydrogen regulating valve and a second pneumatic four-way valve are connected by a pipeline, the second pneumatic four-way valve and a dryer A are connected by a pipeline, the dryer A and a third pneumatic four-way valve are connected by a pipeline, the third pneumatic four-way valve and a hydrogen filter are connected by a pipeline, and a recovery component is provided at the outlet end of the hydrogen filter.
[0006] Preferably, the recovery component includes an integrated system of oxygen meter and dew point meter, which is connected to the hydrogen filter via a pipeline, and is connected to pneumatic ball valve one via a pipeline, and is connected to pneumatic ball valve two via a pipeline.
[0007] Preferably, the deoxygenated liquid separator and the hydrogen flow meter are connected by a pipeline, and the hydrogen flow meter and the pneumatic four-way valve are connected by a pipeline.
[0008] Preferably, the pneumatic four-way valve and the pre-dryer are connected by a pipeline, and the pre-dryer and the drying electric heater are connected by a pipeline.
[0009] Preferably, the drying electric heater and the pneumatic four-way valve three are connected by a pipe, and the pneumatic four-way valve three and the dryer B are connected by a pipe.
[0010] Preferably, the dryer B and the pneumatic four-way valve two are connected by a pipe, and the pneumatic four-way valve two and the pneumatic four-way valve one are connected by a pipe.
[0011] Preferably, the pneumatic four-way valve one is connected to the cooler via a pipeline, the cooler is connected to the dryer gas-liquid separator via a pipeline, the dryer gas-liquid separator is connected to the first pneumatic ball valve via a pipeline, and the pneumatic four-way valve two is connected to the dryer A via a pipeline.
[0012] Preferably, the alkaline heat exchanger and the water circuit regulating valve are connected by a pipeline, and the water circuit regulating valve and the cooler are connected by a pipeline.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this utility model, the cooperation between the alkaline heat exchanger, hydrogen heat exchanger, deoxygenation reactor, drying electric heater, cooler, deoxygenated liquid separator, hydrogen regulating valve, second pneumatic ball valve and pneumatic four-way valve can effectively recover and utilize the heat of high-temperature alkaline solution, thus effectively saving resources.
[0015] 2. In this utility model, the cooperation between the drying electric heater, dryer A, dryer B, hydrogen filter, water circuit regulating valve, pneumatic four-way valve one, pneumatic four-way valve two and hydrogen flow meter can achieve the effect of eliminating the electric heating equipment of the deoxygenation tower, reducing equipment costs. Adding a hydrogen electric heater and removing the built-in electric heater of each drying tower reduces equipment costs and lowers the difficulty of logic control. Attached Figure Description
[0016] Figure 1This is a perspective view of a hydrogen purification and heat recovery device proposed in this utility model;
[0017] Figure 2 This is a partial structural diagram of the alkaline heat exchanger of a hydrogen purification heat recovery device proposed in this utility model.
[0018] Figure 3 This is a partial structural diagram of the dryer B in a hydrogen purification heat recovery device proposed in this utility model;
[0019] Figure 4 This is a partial structural diagram of the drying electric heater of a hydrogen purification heat recovery device proposed in this utility model;
[0020] Figure 5 This is a partial structural diagram of the deoxygenated liquid separator of a hydrogen purification heat recovery device proposed in this utility model;
[0021] Figure 6 This is a block diagram of the overall structure of the deoxygenated liquid separator of a hydrogen purification heat recovery device proposed in this utility model.
[0022] Legend:
[0023] 1. Alkali heat exchanger; 2. Hydrogen heat exchanger; 3. Deoxygenation reactor; 4. Drying electric heater; 5. Cooler; 6. Drying gas-liquid separator; 7. Pre-dryer; 8. Deoxygenated liquid separator; 9. Dryer A; 10. Dryer B; 11. Hydrogen filter; 12. Water circuit regulating valve; 13. Pneumatic four-way valve one; 14. Pneumatic four-way valve two; 15. Hydrogen flow meter; 16. Hydrogen regulating valve; 17. First pneumatic ball valve; 18. Second pneumatic ball valve; 19. Pneumatic four-way valve three; 20. Micro-oxygen meter and dew point meter integrated system; 21. Pneumatic ball valve one; 22. Pneumatic ball valve two. Detailed Implementation
[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] Reference Figure 1 , Figure 2 , Figure 4 and Figure 6One embodiment of this utility model provides a hydrogen purification heat recovery device, including an alkaline heat exchanger 1, which is connected to a hydrogen heat exchanger 2 via a pipeline, and the hydrogen heat exchanger 2 is connected to a deoxygenation reactor 3 via a pipeline, the deoxygenation reactor 3 is connected to a cooler 5 via a pipeline, the cooler 5 is connected to a deoxygenated liquid separator 8 via a pipeline, the deoxygenated liquid separator 8 is connected to a second pneumatic ball valve 18 via a pipeline, the deoxygenated liquid separator 8 is connected to a hydrogen regulating valve 16 via a pipeline, the hydrogen regulating valve 16 is connected to a second pneumatic four-way valve 14 via a pipeline, the second pneumatic four-way valve 14 is connected to a dryer A9 via a pipeline, the dryer A9 is connected to a third pneumatic four-way valve 19 via a pipeline, the third pneumatic four-way valve 19 is connected to a hydrogen filter 11 via a pipeline, and a recovery component is provided at the outlet end of the hydrogen filter 11.
[0026] Specifically, after separation by the separation system, the raw hydrogen enters the hydrogen heat exchanger 2, where it exchanges heat with the high-temperature alkaline solution, heating the raw hydrogen to approximately 40°C. The raw hydrogen then enters the deoxygenation reactor 3, where, under the catalytic action of a palladium catalyst, oxygen is removed from the hydrogen. The high-temperature alkaline solution, after heat exchange in the hydrogen heat exchanger 2, then enters the alkaline solution heat exchanger 1 to exchange heat with cooling water. The cooling water flow rate is adjusted by the water flow regulating valve 12 to maintain the temperature of the alkaline solution at the electrolyzer inlet. After deoxygenation, the raw hydrogen enters the cooler 5 for further heat exchange, maintaining the hydrogen temperature at approximately 10°C. It then enters the deoxygenated liquid separator 8 to remove free water. The free water is discharged outside the separator 8 through the second pneumatic ball valve 18 according to the liquid level within the deoxygenated liquid separator 8. After cryogenic cooling, the hydrogen gas flows through hydrogen regulating valve 16 to regulate its flow rate and enters dryer A9 through pneumatic four-way valve 2 14 for adsorption and dehydration. Then, it enters hydrogen filter 11 through pneumatic four-way valve 3 19 to remove powder impurities. The purity and dew point are analyzed by an integrated system of micro-oxygen meter and dew point meter. Qualified hydrogen gas enters the downstream through pneumatic ball valve 1 21, while unqualified hydrogen gas enters the venting pipeline through pneumatic ball valve 2 22 for venting.
[0027] Reference Figure 4 and Figure 5 The recovery components include a micro-oxygen meter and dew point meter integrated system 20, which is connected to the hydrogen filter 11 via a pipeline, and is connected to the pneumatic ball valve 21 via a pipeline, and is connected to the pneumatic ball valve 22 via a pipeline.
[0028] Specifically, after deoxygenation, the raw hydrogen enters the cooler 5 for heat exchange, maintaining the hydrogen at around 10°C. It then enters the deoxygenated liquid separator 8 to remove free water. The free water is discharged outside the boundary through the second pneumatic ball valve 18 according to the liquid level in the deoxygenated liquid separator 8. The deeply cooled hydrogen flows through the hydrogen regulating valve 16 to regulate the flow rate and enters the dryer B10 through the pneumatic four-way valve 2 14 for adsorption and dehydration. Then, it enters the hydrogen filter 11 through the pneumatic four-way valve 3 19 to remove powder impurities. The purity and dew point are analyzed by the integrated system of micro-oxygen meter and dew point meter. Qualified hydrogen enters the downstream through the pneumatic ball valve 1 21, while unqualified hydrogen enters the venting pipeline through the pneumatic ball valve 2 22 for venting.
[0029] Reference Figure 3 The deoxygenated liquid separator 8 and the hydrogen flow meter 15 are connected by a pipe. The hydrogen flow meter 15 and the pneumatic four-way valve 13 are connected by a pipe. The pneumatic four-way valve 13 and the pre-dryer 7 are connected by a pipe. The pre-dryer 7 and the drying electric heater 4 are connected by a pipe.
[0030] Specifically, after cooling, the hydrogen flow rate is determined by hydrogen flow meter 15. The regenerated gas then enters the pre-dryer 7 through one side of pneumatic four-way valve 13 for cold blowing, which lowers the temperature of the molecular sieve in the pre-dryer 7 to room temperature for use in the next process. The regenerated gas then enters the drying electric heater 4 and is heated to about 180°C. After heating, the regenerated gas enters the dryer A9 through the other side of pneumatic four-way valve 3 19. The high-temperature hydrogen desorbs the molecular sieve in the dryer A9, and the hydrogen containing water vapor enters the cooler 5 for deep cooling through pneumatic four-way valve 2 14 and pneumatic four-way valve 13. The deeply cooled hydrogen, carrying free water, enters the drying gas-liquid separator 6 to remove the free water. The free water is discharged outside the boundary through the first pneumatic ball valve 17 according to the liquid level in the drying gas-liquid separator 6. The deeply cooled hydrogen and the deoxygenated deeply cooled hydrogen then enter the dryer B10 through pneumatic four-way valve 2 14 for adsorption and dehydration.
[0031] Reference Figure 3 and Figure 5 The dryer electric heater 4 and the pneumatic four-way valve 3 19 are connected by a pipe. The pneumatic four-way valve 3 19 and the dryer B10 are connected by a pipe. The dryer B10 and the pneumatic four-way valve 2 14 are connected by a pipe. The pneumatic four-way valve 2 14 and the pneumatic four-way valve 1 13 are connected by a pipe.
[0032] Specifically, after the molecular sieve in dryer A9 is desorbed, dryer A9 enters a cold blowing state, and pre-dryer 7 enters a hot blowing state. After cooling, the hydrogen is directed to another hydrogen flow meter 15 to determine the regeneration gas flow rate. The regeneration gas then enters dryer A9 through pneumatic four-way valve 13 and pneumatic four-way valve 214 for cold blowing, which lowers the temperature of the molecular sieve in dryer A9 to room temperature for use in the next process. The regeneration gas then enters dryer electric heater 4 and is heated to about 180°C. After heating, the regeneration gas enters pre-dryer 7, where high-temperature hydrogen desorbs the molecular sieve in pre-dryer 7. The hydrogen containing water vapor enters cooler 5 for deep cooling through pneumatic four-way valve 13. The deep-cooled hydrogen, carrying free water, enters dryer gas-liquid separator 6 to remove free water. The free water is discharged outside the boundary through first pneumatic ball valve 17 according to the liquid level in dryer gas-liquid separator 6. The deep-cooled hydrogen and the deoxygenated deep-cooled hydrogen merge and enter dryer B10 through pneumatic four-way valve 214 for adsorption and dehydration.
[0033] Reference Figure 2 , Figure 3 and Figure 4 The pneumatic four-way valve 13 and the cooler 5 are connected by a pipe. The cooler 5 and the dryer gas-liquid separator 6 are connected by a pipe. The dryer gas-liquid separator 6 and the first pneumatic ball valve 17 are connected by a pipe. The pneumatic four-way valve 14 and the dryer A9 are connected by a pipe.
[0034] Specifically, hydrogen gas containing water vapor enters the cooler 5 for deep cooling through pneumatic four-way valve 13. The deeply cooled hydrogen gas, carrying free water, enters the dry gas-liquid separator 6 to remove the free water. The free water is discharged outside the separator 6 through the first pneumatic ball valve 17 according to the liquid level inside the dry gas-liquid separator 6. The deeply cooled hydrogen gas merges with the deoxygenated deeply cooled hydrogen gas and enters the dryer A9 through pneumatic four-way valve 14 for adsorption and dehydration.
[0035] Reference Figure 1 The alkaline heat exchanger 1 and the water circuit regulating valve 12 are connected by a pipe, and the water circuit regulating valve 12 and the cooler 5 are connected by a pipe.
[0036] Specifically, the water circuit of the alkali heat exchanger 1 can be regulated by the water circuit regulating valve 12, and the cooler 5 and the alkali heat exchanger 1 can be connected by the water circuit regulating valve 12.
[0037] Working principle: When the device is needed, the raw hydrogen gas separated by the separation system first enters the hydrogen heat exchanger 2, where it exchanges heat with the high-temperature alkaline solution, heating the raw hydrogen gas to approximately 40°C. The raw hydrogen gas then enters the deoxygenation reactor 3, where, under the catalytic action of palladium catalyst, oxygen is removed from the hydrogen gas. The high-temperature alkaline solution, after heat exchange in the hydrogen heat exchanger 2, then enters the alkaline solution heat exchanger 1 to exchange heat with cooling water. The cooling water flow rate is adjusted by the water circuit regulating valve 12 to maintain the temperature of the alkaline solution at the inlet of the electrolyzer.
[0038] After deoxygenation, the raw hydrogen enters the cooler 5 for heat exchange, maintaining the hydrogen temperature at around 10°C. It then enters the deoxygenated liquid separator 8 to remove free water. The free water is discharged outside the separator 8 via the second pneumatic ball valve 18 according to the liquid level. The cryogenically cooled hydrogen then flows through the hydrogen regulating valve 16, adjusting its flow rate, and enters the dryer A9 via the second pneumatic four-way valve 14 for adsorption and dehydration. It then enters the hydrogen filter 11 via the third pneumatic four-way valve 19 to remove powder impurities. The purity and dew point are analyzed by an integrated system of micro-oxygen meter and dew point meter. Qualified hydrogen enters the downstream via the first pneumatic ball valve 21, while unqualified hydrogen enters the venting pipeline via the second pneumatic ball valve 22 for venting.
[0039] After cooling, the hydrogen flow rate is determined by hydrogen flow meter 15. The regenerated gas then enters the pre-dryer 7 through one side of pneumatic four-way valve 13 for cold blowing, which lowers the temperature of the molecular sieve in the pre-dryer 7 to room temperature for use in the next process. The regenerated gas then enters the drying electric heater 4 and is heated to about 180°C. After heating, the regenerated gas enters the dryer B10 through the other side of pneumatic four-way valve 3 19. The high-temperature hydrogen desorbs the molecular sieve in the dryer B10, and the hydrogen containing water vapor enters the cooler 5 for deep cooling through pneumatic four-way valve 2 14 and pneumatic four-way valve 13. The deeply cooled hydrogen, carrying free water, enters the drying gas-liquid separator 6 to remove the free water. The free water is discharged outside the boundary through the first pneumatic ball valve 17 according to the liquid level in the drying gas-liquid separator 6. The deeply cooled hydrogen and the deoxygenated deeply cooled hydrogen then enter the dryer A9 through pneumatic four-way valve 2 14 for adsorption and dehydration.
[0040] After the molecular sieve desorption is completed in dryer B10, dryer B10 enters a cold-blowing state, and pre-dryer 7 enters a hot-blowing state. After cooling, hydrogen is supplied through another channel via hydrogen flow meter 15 to determine the regeneration gas flow rate. The regeneration gas then enters dryer B10 through pneumatic four-way valve 13 and pneumatic four-way valve 24 for cold blowing, which lowers the temperature of the molecular sieve in dryer B10 to room temperature for use in the next process. The regeneration gas then enters dryer electric heater 4 and is heated to about 180°C. After heating, the regeneration gas enters pre-dryer 7 at a high temperature. Hydrogen desorbs the molecular sieve in the pre-dryer 7. The hydrogen containing water vapor enters the cooler 5 for deep cooling through the pneumatic four-way valve 13. The deep-cooled hydrogen, carrying free water, enters the dry gas-liquid separator 6 to remove the free water. The free water is discharged outside the boundary through the first pneumatic ball valve 17 according to the liquid level in the dry gas-liquid separator 6. The deep-cooled hydrogen and the deoxygenated deep-cooled hydrogen merge and enter the dryer A9 for adsorption and dehydration through the pneumatic four-way valve 14. After the molecular sieve in the pre-dryer 7 has completed its desorption, the program automatically switches to the next working cycle.
[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hydrogen purification heat recovery device, characterized in that: The device includes an alkali heat exchanger, which is connected to a hydrogen heat exchanger via a pipeline; the hydrogen heat exchanger is connected to a deoxygenation reactor via a pipeline; the deoxygenation reactor is connected to a cooler via a pipeline; the cooler is connected to a deoxygenated liquid separator via a pipeline; the deoxygenated liquid separator is connected to a second pneumatic ball valve via a pipeline; the deoxygenated liquid separator is connected to a hydrogen regulating valve via a pipeline; the hydrogen regulating valve is connected to a second pneumatic four-way valve via a pipeline; the second pneumatic four-way valve is connected to dryer A via a pipeline; dryer A is connected to a third pneumatic four-way valve via a pipeline; and the third pneumatic four-way valve is connected to a hydrogen filter via a pipeline. A recovery assembly is installed at the outlet end of the hydrogen filter.
2. The hydrogen purification heat recovery device according to claim 1, characterized in that: The recovery assembly includes an integrated system of micro-oxygen meter and dew point meter, which is connected to a hydrogen filter via a pipeline, and is connected to a pneumatic ball valve one via a pipeline, and is connected to a pneumatic ball valve two via a pipeline.
3. The hydrogen purification heat recovery device according to claim 1, characterized in that: The deoxygenated liquid separator and the hydrogen flow meter are connected by a pipeline, and the hydrogen flow meter and the pneumatic four-way valve are connected by a pipeline.
4. The hydrogen purification heat recovery device according to claim 3, characterized in that: The pneumatic four-way valve and the pre-dryer are connected by a pipe, and the pre-dryer and the drying electric heater are connected by a pipe.
5. The hydrogen purification heat recovery device according to claim 4, characterized in that: The drying electric heater and the pneumatic four-way valve are connected by a pipe, and the pneumatic four-way valve and the dryer B are connected by a pipe.
6. The hydrogen purification heat recovery device according to claim 5, characterized in that: The dryer B and the pneumatic four-way valve two are connected by a pipe, and the pneumatic four-way valve two and the pneumatic four-way valve one are connected by a pipe.
7. The hydrogen purification heat recovery device according to claim 6, characterized in that: The pneumatic four-way valve one is connected to the cooler via a pipe, the cooler is connected to the dryer gas-liquid separator via a pipe, the dryer gas-liquid separator is connected to the first pneumatic ball valve via a pipe, and the pneumatic four-way valve two is connected to the dryer A via a pipe.
8. The hydrogen purification heat recovery device according to claim 1, characterized in that: The alkaline heat exchanger and the water circuit regulating valve are connected by a pipeline, and the water circuit regulating valve and the cooler are connected by a pipeline.