Hydrogen dechlorination and deoxidation purification system
The hydrogen dechlorination and deoxygenation purification system, utilizing multi-stage purification equipment and alternating dechlorination and drying towers, solves the problem of excessive oxygen and chlorine in hydrogen, achieving efficient purification and continuous production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
AI Technical Summary
Existing technologies fail to meet hydrogen purification standards, with excessive levels of impurities such as oxygen, chlorine, sulfur, mercury, and carbon monoxide, thus failing to meet the quality requirements of the finished gas.
The system employs a hydrogen dechlorination and deoxygenation purification system, which includes a raw gas separator, a dechlorination tower, a deoxygenation tower, a hydrogen cooler, a first water separator, and a drying tower. Through a multi-stage purification process, oxygen and chlorine are removed from the hydrogen. Two sets of dechlorination towers and drying towers are set up to work alternately to achieve continuous production.
It effectively removes oxygen and chlorine from hydrogen, and the purification results meet customer requirements, enabling continuous production.
Smart Images
Figure CN224071607U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of purification technology, and in particular to a hydrogen dechlorination and deoxygenation purification system. Background Technology
[0002] The raw material gas contains trace amounts of oxygen, moisture, chlorine, and alkali, while the finished product gas must contain less than 0.1% oxygen, chlorine, sulfur, and mercury, less than 1% carbon monoxide, and less than 3% carbon dioxide. Existing production lines can achieve purification, but the results do not meet the standards. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hydrogen dechlorination and deoxygenation purification system.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A hydrogen dechlorination and deoxygenation purification system includes a raw gas separator, a dechlorination tower, a deoxygenation tower, a hydrogen cooler, a first water separator, and a drying tower. The raw gas separator is equipped with a raw gas cooler at its input end. The output end of the raw gas separator is connected to the input end of the dechlorination tower. The output end of the dechlorination tower is connected to the input end of the deoxygenation tower through a filter. The output end of the deoxygenation tower is connected to the input end of the drying tower after passing through the hydrogen cooler and the first water separator in sequence. A hydrogen discharge pipe is connected to the output end of the drying tower.
[0006] Furthermore, two dechlorination towers are arranged in parallel between the raw material gas separator and the filter. Each of the two dechlorination towers is equipped with a dechlorination inlet control valve at its input end and a dechlorination outlet control valve at its output end.
[0007] Furthermore, a regeneration gas inlet pipe is provided between the output end of the dechlorination tower and the dechlorination outlet control valve, and a regeneration gas inlet control valve is provided on the regeneration gas inlet pipe. A regeneration gas outlet pipe is provided between the input end of the dechlorination tower and the dechlorination outlet control valve, and a regeneration gas outlet control valve is provided on the regeneration gas outlet pipe.
[0008] Furthermore, a regeneration gas heater is provided on the regeneration gas inlet pipe, the regeneration gas heater is arranged in parallel with the regeneration gas inlet control valve, and a regeneration gas heating control valve is provided on the output end of the regeneration gas heater.
[0009] Furthermore, a regenerator cooler and a regenerator separator are provided on the regeneration gas outlet pipe, with the regenerator cooler located between the regenerator separator and the regeneration gas outlet control valve.
[0010] Furthermore, two drying towers are arranged side by side at the output end of the first water separator, and each of the two drying towers is equipped with a drying inlet control valve at its input end and a drying outlet control valve at its output end.
[0011] Furthermore, a shut-off valve is provided between the first water separator and the dryer inlet control valve. The two ends of the shut-off valve are connected by a circulation pipe. A circulating hydrogen cooler and a second water separator are provided on the circulation pipe. A circulation inlet control valve is provided at the input end of the circulating hydrogen cooler. A circulation outlet control valve is provided between the circulating hydrogen cooler and the second water separator.
[0012] Furthermore, a pre-drying pipe is provided between the input end of the circulation inlet control valve and the input end of the drying outlet control valve. A pre-drying tower and a circulating hydrogen heater are provided on the pre-drying pipe. The pre-drying tower is located close to the circulation inlet control valve. A first pre-control valve is provided at the input end of the pre-drying tower, a second pre-control valve is provided at the output end of the pre-drying tower, and a third pre-control valve is provided at the output end of the circulating hydrogen heater.
[0013] Furthermore, the output end of the drying inlet control valve is connected to one end of the regeneration drying tube, the other end of the regeneration drying tube is connected to the branch pipe, both ends of the branch pipe are connected to the circulation pipe, the end of the pre-drying tube is located between the two ends of the branch pipe, the branch pipe is equipped with a branch control valve, and the two drying towers are respectively connected to the regeneration drying tube through the regeneration drying valve.
[0014] The beneficial effects of this utility model are:
[0015] 1) In this technology, by using equipment such as dechlorination tower, deoxygenation tower and drying tower in combination, oxygen and chlorine in hydrogen can be effectively removed, and the purification results meet customer requirements.
[0016] 2) In this technology, the dechlorination tower is set up with two sets, one set is working and the other set is regenerated, so that continuous production can be achieved.
[0017] 3) In this technology, there are also two sets of drying towers, one set is working and the other set is regenerating, so that continuous production can be achieved. Attached Figure Description
[0018] Figure 1 This is a connection structure diagram of the device;
[0019] Figure 2 This is a diagram showing the connection structure between the dechlorination tower, the deoxygenation tower, and the hydrogen cooler.
[0020] Figure 3 This is a diagram showing the connection structure between the drying tower, the pre-drying tower, and the circulating hydrogen heater.
[0021] In the diagram, 1-raw material gas separator, 2-dechlorination tower, 3-deoxygenation tower, 4-hydrogen cooler, 5-first water separator, 6-drying tower, 7-raw material gas cooler, 8-filter, 9-hydrogen discharge pipe, 10-dechlorination inlet control valve, 11-dechlorination outlet control valve, 12-regeneration gas inlet pipe, 13-regeneration gas inlet control valve, 14-regeneration gas outlet pipe, 15-regeneration gas outlet control valve, 16-regeneration gas heater, 17-regeneration gas heating control valve, 18-regenerator cooler, 19-regeneration 20-Drying inlet control valve, 21-Drying outlet control valve, 22-Shut-off valve, 23-Circulation pipe, 24-Circulating hydrogen cooler, 25-Second water separator, 26-Circulation inlet control valve, 27-Circulation outlet control valve, 28-Pre-drying pipe, 29-Pre-drying tower, 30-Circulating hydrogen heater, 31-First pre-control valve, 32-Second pre-control valve, 33-Third pre-control valve, 34-Regeneration drying pipe, 35-Branch pipe, 36-Branch control valve, 37-Regeneration drying valve. Detailed Implementation
[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. 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.
[0023] See Figures 1-3 This utility model provides a technical solution:
[0024] The hydrogen dechlorination and deoxygenation purification system includes a raw gas separator 1, a dechlorination tower 2, a deoxygenation tower 3, a hydrogen cooler 4, a first water separator 5, and a drying tower 6. A raw gas cooler 7 is installed at the input end of the raw gas separator 1. The output end of the raw gas separator 1 is connected to the input end of the dechlorination tower 2. The output end of the dechlorination tower 2 is connected to the input end of the deoxygenation tower 3 via a filter 8. The output end of the deoxygenation tower 3 is connected to the input end of the drying tower 6 via the hydrogen cooler 4 and the first water separator 5. A hydrogen discharge pipe 9 is connected to the output end of the drying tower 6. The raw gas cooler 7, filter 8, raw gas separator 1, dechlorination tower 2, deoxygenation tower 3, hydrogen cooler 4, first water separator 5, and drying tower 6 are all existing technology equipment. Before entering this system, the saturation temperature of the raw gas is 72℃. Therefore, the raw gas cooler 7 is required to cool the incoming raw gas. When cooled to 40-45℃, more than 70% of the saturated water vapor can be removed, reducing the saturated water content of the raw gas. In order to ensure the normal service life of the highly valuable palladium catalyst (deoxygenation catalyst) in the subsequent deoxygenation tower 3, the raw gas needs to be pre-removed of trace amounts of chlorine and alkali after water removal. The dechlorination tower 2 is used to remove chlorine and alkali, and then the gas enters the deoxygenation tower 3. In the dechlorination tower 2, some water is removed again. The raw gas is deoxygenated in deoxygenation tower 3. H2 and O2 undergo a vigorous oxidation reaction on a palladium catalyst. Due to the high oxygen content, the system temperature rises significantly, with a total temperature rise of 450-480°C. The deoxygenated hydrogen needs to be cooled by hydrogen cooler 4 to 45°C before passing through the first water separator 5 to separate water. The gas portion then enters drying tower 6 for isobaric drying. Isobaric drying is a conventional drying process with no hydrogen loss. The hydrogen dew point after drying in drying tower 6 is -20°C, which fully meets the requirements of subsequent processes.
[0025] In some embodiments, two dechlorination towers 2 are arranged side-by-side between the raw gas separator 1 and the filter 8. Each dechlorination tower 2 has a dechlorination inlet control valve 10 at its inlet and a dechlorination outlet control valve 11 at its outlet. Two dechlorination towers 2 are configured, each with one dechlorination inlet control valve 10 and one dechlorination outlet control valve 11. Both the dechlorination inlet control valve 10 and the dechlorination outlet control valve 11 are conventional control valves. The two dechlorination towers 2 can perform continuous processing; one tower 2 performs processing operations while the other performs regeneration operations. During the regeneration operation of the dechlorination tower 2, both the corresponding dechlorination inlet control valve 10 and dechlorination outlet control valve 11 are closed.
[0026] In some embodiments, a regeneration gas inlet pipe 12 is connected between the output end of the dechlorination tower 2 and the dechlorination control valve 11, and a regeneration gas inlet control valve 13 is installed on the regeneration gas inlet pipe 12. A regeneration gas outlet pipe 14 is connected between the input end of the dechlorination tower 2 and the dechlorination control valve 10, and a regeneration gas outlet control valve 15 is installed on the regeneration gas outlet pipe 14. A regeneration gas heater 16 is installed on the regeneration gas inlet pipe 12, and the regeneration gas heater 16 is arranged in parallel with the regeneration gas inlet control valve 13. A regeneration gas heating control valve 17 is installed on the output end of the regeneration gas heater 16. A regenerator cooler 18 and a regenerator separator 19 are installed on the regeneration gas outlet pipe 14, and the regenerator cooler 18 is located between the regenerator separator 19 and the regeneration gas outlet control valve 15. Nitrogen gas can be introduced into the regeneration gas inlet pipe 12. When the regeneration gas inlet control valve 13 is open, the nitrogen gas can directly enter the dechlorination tower 2 for regeneration. Alternatively, the regeneration gas inlet control valve 13 can be closed, and the regeneration gas heating control valve 17 can be opened. The nitrogen gas will then be heated by the existing regeneration gas heater 16 before entering the dechlorination tower 2. When the dechlorination tower 2 is regenerating, the corresponding regeneration gas outlet control valve 15 on the regeneration gas outlet pipe 14 is opened to facilitate the discharge of gas from the dechlorination tower 2. The discharged gas is collected after passing through the existing regenerator cooler 18 and regenerator separator 19. The regeneration gas heater 16 heats the nitrogen gas, the regenerator cooler 18 cools it, and the regenerator separator 19 removes water. The gas collected on the regeneration gas outlet pipe 14 is all gas. The regeneration gas inlet control valve 13, the regeneration gas outlet control valve 15, and the regeneration gas heating control valve 17 are all existing control valves.
[0027] In some embodiments, two drying towers 6 are arranged side-by-side at the output end of the first water separator 5. Each drying tower 6 has a drying inlet control valve 20 at its input end and a drying outlet control valve 21 at its output end. There are two drying towers 6, each with a corresponding drying inlet control valve 20 and a drying outlet control valve 21. Both the drying inlet control valve 20 and the drying outlet control valve 21 are conventional control valves. The two drying towers 6 can perform continuous processing; one drying tower 6 performs processing operations while the other performs regeneration operations. During the regeneration operation of the drying tower 6, both the corresponding drying inlet control valve 20 and drying outlet control valve 21 are closed.
[0028] In some embodiments, a shut-off valve 22 is provided between the first water separator 5 and the drying inlet control valve 20. The two ends of the shut-off valve 22 are connected by a circulation pipe 23. A circulating hydrogen cooler 24 and a second water separator 25 are provided on the circulation pipe 23. A circulation inlet control valve 26 is provided at the input end of the circulating hydrogen cooler 24, and a circulation outlet control valve 27 is provided between the circulating hydrogen cooler 24 and the second water separator 25. The shut-off valve 22 and the circulation inlet control valve 26 are conventional control valves. Normally, the shut-off valve 22 is open, and the gas after passing through the first water separator 5 directly enters the drying tower 6. In some cases, for better purification, the shut-off valve 22 is closed, and the circulation inlet control valve 26 is opened, allowing hydrogen to enter the circulation pipe 23. Then, after processing by the conventional circulating hydrogen cooler 24 and the second water separator 25, it enters the drying tower 6 from the input end. The circulating hydrogen cooler 24 cools the hydrogen, and the second water separator 25 performs a second dehydration operation on the hydrogen.
[0029] In some embodiments, a pre-drying pipe 28 is provided between the input end of the circulation inlet control valve 26 and the input end of the drying outlet control valve 21. A pre-drying tower 29 and a circulating hydrogen heater 30 are provided on the pre-drying pipe 28. The pre-drying tower 29 is located near the circulation inlet control valve 26. A first pre-control valve 31 is provided at the input end of the pre-drying tower 29, a second pre-control valve 32 is provided at the output end of the pre-drying tower 29, and a third pre-control valve 33 is provided at the output end of the circulating hydrogen heater 30. The output end of the drying inlet control valve 20 is connected to one end of the regeneration drying pipe 34, and the other end of the regeneration drying pipe 34 is connected to a branch pipe 35. Both ends of the branch pipe 35 are connected to the circulation pipe 23. The end of the pre-drying pipe 28 is located between the two ends of the branch pipe 35. A branch control valve 36 is provided on the branch pipe 35. The two drying towers 6 are respectively connected to the regeneration drying pipe 34 through regeneration drying valves 37. The pre-drying tower 29 and the circulating hydrogen heater 30 are both existing technologies. When the drying tower 6 is regenerated, the corresponding drying inlet control valve 20 and drying outlet control valve 21 are closed, while the corresponding first pre-control valve 31, second pre-control valve 32, third pre-control valve 33, branch control valve 36 and regeneration drying valve 37 are opened. The gas enters the pre-drying tower 29 for drying through the circulation pipe 23 and the pre-drying pipe 28, and then is heated in the circulating hydrogen heater 30. After that, it enters the drying tower 6 for regeneration, and then enters the circulating hydrogen cooler 24 and the pre-drying tower 29 through the regeneration drying pipe 34 and the branch pipe 35.
[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "other end", "coaxial", "one side", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "setting", "installation", "connection", "fixing", "hinged" and other such terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.
Claims
1. A hydrogen dechlorination and deoxygenation purification system, characterized in that: The system includes a raw gas separator (1), a dechlorination tower (2), a deoxygenation tower (3), a hydrogen cooler (4), a first water separator (5), and a drying tower (6). The input end of the raw gas separator (1) is equipped with a raw gas cooler (7). The output end of the raw gas separator (1) is connected to the input end of the dechlorination tower (2). The output end of the dechlorination tower (2) is connected to the input end of the deoxygenation tower (3) through a filter (8). The output end of the deoxygenation tower (3) is connected to the input end of the drying tower (6) after passing through the hydrogen cooler (4) and the first water separator (5). The output end of the drying tower (6) is connected to a hydrogen discharge pipe (9).
2. The hydrogen dechlorination and deoxygenation purification system according to claim 1, characterized in that: Two dechlorination towers (2) are arranged side by side between the raw material gas separator (1) and the filter (8). Both dechlorination towers (2) are equipped with dechlorination inlet control valves (10) at their input ends and dechlorination outlet control valves (11) at their output ends.
3. The hydrogen dechlorination and deoxygenation purification system according to claim 2, characterized in that: A regeneration gas inlet pipe (12) is provided between the output end of the dechlorination tower (2) and the dechlorination outlet control valve (11). A regeneration gas inlet control valve (13) is provided on the regeneration gas inlet pipe (12). A regeneration gas outlet pipe (14) is provided between the input end of the dechlorination tower (2) and the dechlorination outlet control valve (10). A regeneration gas outlet control valve (15) is provided on the regeneration gas outlet pipe (14).
4. The hydrogen dechlorination and deoxygenation purification system according to claim 3, characterized in that: A regenerated gas heater (16) is provided on the regenerated gas inlet pipe (12). The regenerated gas heater (16) and the regenerated gas inlet control valve (13) are arranged side by side. A regenerated gas heating control valve (17) is provided on the output end of the regenerated gas heater (16).
5. The hydrogen dechlorination and deoxygenation purification system according to claim 3, characterized in that: The regenerator cooler (18) and the regenerator separator (19) are provided on the regenerator outlet pipe (14). The regenerator cooler (18) is located between the regenerator separator (19) and the regenerator outlet control valve (15).
6. The hydrogen dechlorination and deoxygenation purification system according to claim 1 or 2, characterized in that: Two drying towers (6) are arranged side by side on the output end of the first water separator (5). A drying inlet control valve (20) is provided on the input end of each of the two drying towers (6), and a drying outlet control valve (21) is provided on the output end of each drying tower (6).
7. The hydrogen dechlorination and deoxygenation purification system according to claim 6, characterized in that: A shut-off valve (22) is provided between the first water separator (5) and the dryer inlet control valve (20). The two ends of the shut-off valve (22) are connected by a circulation pipe (23). A circulating hydrogen cooler (24) and a second water separator (25) are provided on the circulation pipe (23). A circulation inlet control valve (26) is provided at the input end of the circulating hydrogen cooler (24). A circulation outlet control valve (27) is provided between the circulating hydrogen cooler (24) and the second water separator (25).
8. The hydrogen dechlorination and deoxygenation purification system according to claim 7, characterized in that: A pre-drying pipe (28) is provided between the input end of the circulation inlet control valve (26) and the input end of the drying outlet control valve (21). A pre-drying tower (29) and a circulating hydrogen heater (30) are provided on the pre-drying pipe (28). The pre-drying tower (29) is located close to the circulation inlet control valve (26). A first pre-control valve (31) is provided at the input end of the pre-drying tower (29). A second pre-control valve (32) is provided at the output end of the pre-drying tower (29). A third pre-control valve (33) is provided at the output end of the circulating hydrogen heater (30).
9. The hydrogen dechlorination and deoxygenation purification system according to claim 8, characterized in that: The output end of the drying inlet control valve (20) is connected to one end of the regeneration drying pipe (34), and the other end of the regeneration drying pipe (34) is connected to the branch pipe (35). Both ends of the branch pipe (35) are connected to the circulation pipe (23). The end of the pre-drying pipe (28) is located between the two ends of the branch pipe (35). A branch control valve (36) is provided on the branch pipe (35). The two drying towers (6) are respectively connected to the regeneration drying pipe (34) through the regeneration drying valve (37).