Hydrogen membrane separation device

Abstract

The utility model discloses a hydrogen membrane separation device, which realizes double-prevention water removal through the matching action of a water filtering buffer tank, a U-shaped heater and a separator buffer tank, and realizes secondary prevention through the water absorption and compression resistance action of carbon fiber filler in the water filtering buffer tank. According to the overheating protection system, when too much steam enters the U-shaped heater, the temperature of gas is too high, the overheating protection system controls the steam adjusting valve to adjust the opening degree through the reaction of the process gas filter to reduce air, meanwhile, part of tail gas is pressurized through the draught fan, and the tail gas self-adjusting valve is automatically opened to be mixed with process gas to reduce the temperature; under the action of the overheating system, the film pipe can be better protected, and the shutdown frequency caused by melting of the film pipe is avoided; after the starting and stopping times are reduced, the operation and maintenance cost is reduced; and the permeated gas filter filters dust and purely conveys gas to a subsequent system, so that the dust of the membrane tube entering the subsequent system is reduced.

Description

Technical Field

[0001] This utility model relates to the field of process gas purification technology, and in particular to a hydrogen membrane separation device. Background Technology

[0002] While hydrogen separation membrane technology has made some progress, different types of membrane materials still present challenges in terms of performance, cost, and stability, limiting their large-scale application. Existing technologies include several different hydrogen production membrane separation device solutions, such as dense metal membranes, inorganic porous membranes, metal-organic framework (MOF) membranes, organic polymer membranes, hybrid matrix membranes, and combinations of multiple technologies.

[0003] Existing hydrogen membrane separation devices have the following problems:

[0004] 1. Operational errors may lead to excessively high temperatures or water entering the membrane tube due to gas, resulting in a reduced lifespan of the membrane tube.

[0005] Therefore, it is necessary to develop a hydrogen membrane separation device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to design a hydrogen membrane separation device to solve the above problems.

[0007] This utility model achieves the above objectives through the following technical solutions:

[0008] Hydrogen membrane separation device, including:

[0009] Ammonia scrubbing tower; the process gas input pipeline is connected to the lower side wall of the ammonia scrubbing tower; the circulating water inlet pipeline is connected to the upper side wall of the ammonia scrubbing tower.

[0010] Separator buffer tank; the upper end of the ammonia washing tower is connected to the input end of the separator buffer tank;

[0011] U-shaped heater; the top output end of the separator buffer tank is connected to the input end of the U-shaped heater;

[0012] Process gas filter;

[0013] Water filter buffer tank; carbon fiber packing is installed at the top inside the water filter buffer tank; the output end of the U-shaped heater is connected to the input end of the water filter buffer tank through a process gas filter;

[0014] Membrane tubing assembly; the output end of the water filter buffer tank is connected to the input end of the membrane tubing assembly;

[0015] Pervapor filter; the first output end of the membrane tubing assembly is connected to the input end of the pervapor filter;

[0016] The second output end of the membrane tube assembly is connected to the exhaust gas output pipe and the air inlet of the blower, respectively.

[0017] Steam regulating valve; the steam regulating valve is installed on the main steam output pipeline; one end of the main steam output pipeline is connected to the steam input end of the U-shaped heater;

[0018] Exhaust gas self-regulating valve; the exhaust outlet of the blower is connected to the pipeline between the process gas filter and the filtered water buffer tank after passing through the exhaust gas self-regulating valve; the exhaust gas self-regulating valve is used to adjust the valve position of the steam regulating valve.

[0019] The beneficial effects of this utility model are as follows:

[0020] In this application, the combined action of the water filter buffer tank, the U-shaped heater, and the separator buffer tank achieves dual-prevention water removal, and the water absorption and pressure resistance of the carbon fiber packing in the water filter buffer tank achieves secondary prevention.

[0021] In this application, when too much steam enters the U-shaped heater, the gas temperature will be too high. The overheat protection system in this application controls the steam regulating valve to reduce the air intake by reacting with the process gas filter. At the same time, some of the exhaust gas is pressurized by the fan and automatically opens the exhaust gas self-regulating valve to mix with the process gas and reduce the temperature. The overheat system can better protect the membrane tube and avoid shutdowns caused by membrane tube melting. With fewer shutdowns, the operating and maintenance costs are reduced.

[0022] The permeate filter filters out dust and simply delivers gas to downstream systems, reducing the amount of dust entering the membrane tubes. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this application.

[0024] Legend: 1. Steam main valve; 2. Mixed gas inlet valve; 3. Steam regulating valve; 4. Steam condensate drain valve; 5. Process gas filter; 6. Pre-vent valve; 7. Tail gas self-regulating valve; 8. Carbon fiber packing; 9. Filter water buffer tank; 10. Drain valve; 11. Pressurized blower; 12. Tail gas vent valve; 13. Tail gas main valve; 14. Membrane tubing assembly; 15. Permeate vent valve; 16. Permeate filter; 17. Permeate main valve; 18. U-shaped heater; 19. Separator buffer tank; 20. Ammonia washing tower; 21. Water inlet valve; 22. Process gas inlet valve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component 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.

[0029] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the hydrogen membrane separation device includes:

[0033] Ammonia scrubbing tower 20; a process gas input pipeline is connected to the lower side wall of ammonia scrubbing tower 20; a circulating water inlet pipeline is connected to the upper side wall of ammonia scrubbing tower 20.

[0034] Separator buffer tank 19; the upper end of the ammonia washing tower 20 is connected to the input end of the separator buffer tank 19;

[0035] The top output end of the U-shaped heater 18 and the separator buffer tank 19 are connected to the input end of the U-shaped heater 18.

[0036] Process gas filter 5;

[0037] Water filter buffer tank 9; carbon fiber packing 8 is installed inside the upper part of water filter buffer tank 9; the output end of U-shaped heater 18 is connected to the input end of water filter buffer tank 9 through process gas filter 5;

[0038] Membrane tube assembly 14; the output end of the water filter buffer tank 9 is connected to the input end of the membrane tube assembly 14; there can be multiple membrane tube assemblies 14.

[0039] Pervapor filter 16; the first output end of the membrane tube assembly 14 is connected to the input end of the pervapor filter 16;

[0040] Fan 11; The second output end of the membrane tube sleeve 14 is connected to the exhaust gas output pipe and the air inlet of the fan 11, respectively.

[0041] Steam regulating valve 3; Steam regulating valve 3 is installed on the main steam output pipeline; One end of the main steam output pipeline is connected to the steam input end of the U-shaped heater 18;

[0042] The exhaust gas self-regulating valve 7; the air outlet of the fan 11 is connected to the pipeline between the process gas filter 5 and the water filter buffer tank 9 after passing through the exhaust gas self-regulating valve 7; the exhaust gas self-regulating valve 7 is used to adjust the valve position of the steam regulating valve 3.

[0043] like Figure 1 As shown, in some embodiments, the lower ends of the ammonia washing tower 20, the separator buffer tank 19, the U-shaped heater 18, and the filter buffer tank 9 are all connected to a trench via pipes. A steam condensate drain valve 4 is installed on the pipe at the lower end of the U-shaped heater 18. A drain valve 10 is installed on the pipe at the lower end of the filter buffer tank 9.

[0044] like Figure 1 As shown, in some embodiments, a process gas inlet valve 22 is provided on the process gas input pipeline connected to the ammonia washing tower 20, and a water inlet valve 21 is provided on the circulating water inlet pipeline connected to the ammonia washing tower 20.

[0045] like Figure 1As shown, in some embodiments, a mixed gas inlet valve 2 is provided between the top output end of the separator buffer tank 19 and the input end of the U-shaped heater 18.

[0046] like Figure 1 As shown, in some embodiments, a main exhaust gas valve 13 is provided on the exhaust gas output pipe connected to the second output end of the membrane tube assembly 14.

[0047] like Figure 1 As shown, in some embodiments, a permeate gas main valve is provided at the output end of the permeate gas filter 16.

[0048] like Figure 1 As shown, in some embodiments, the hydrogen membrane separation device further includes a pre-vent valve 6, a tail gas vent valve 12, and a permeate vent valve 15. The first end of the pre-vent valve 6 is connected to the pipeline between the process gas filter 5 and the water buffer tank 9 and is located near the output end of the process gas filter 5. The second end of the pre-vent valve 6 is connected to the first end of the permeate vent valve 15 through a pipeline. The second end of the permeate vent valve 15 is connected to the pipeline between the membrane tube assembly 14 and the permeate filter 16. The pipeline between the pre-vent valve 6 and the permeate vent valve 15 is also connected to the outside. The first end of the tail gas vent valve 12 is connected to the pipeline between the pre-vent valve 6 and the permeate vent valve 15. The first end of the tail gas vent valve 12 is connected to the pipeline between the membrane tube assembly 14 and the tail gas main valve 13.

[0049] like Figure 1 As shown, in some embodiments, a main steam valve 1 is also installed on the main steam output line at a location away from the steam regulating valve 3 and the U-shaped heater 18.

[0050] The gas phase flow of this application is as follows: The process gas inlet valve 22 is opened; the gas enters the ammonia washing tower 20 for ammonia washing, becoming a mixed gas containing H2O, CH4, H2, N2, etc.; the mixed gas enters the separator buffer tank 19, where a portion of the water is separated, and it also acts as a buffer; the mixed gas inlet valve 2 is opened, and the unfiltered water is turned into steam by the U-shaped heater 18, passing through the process gas filter 5; the gas enters the water filter buffer tank 9 to filter out the remaining small amount of water, and the gas passes through the high-performance carbon fiber packing 8; it enters the membrane tube assembly 14*N for H2 separation; the tail gas vent valve 12 and the permeate vent valve 15 are closed; the tail gas main valve 13 is opened, sending CH4 and other gases to the downstream combustion section to save fuel; the H2 enters the permeate steam filter 16 to filter impurities, and the permeate steam main valve 17 is opened to send it into the system for continued use. When the temperature of the process gas filter 5 is too high, part of the tail gas is pressurized by the blower 11, automatically opening the tail gas self-regulating valve 7, reducing the temperature control of the steam regulating valve 3, thereby protecting the membrane tubes.

[0051] Steam process: The main steam valve 1 is started; the amount of steam entering the jacket of the U-shaped heater 18 is regulated by the steam regulating valve 3.

[0052] Liquid flow: Open circulating water inlet valve 21; process gas enters ammonia washing tower 20 and is discharged into the water ditch. Steam enters U-shaped heater 18 to form condensate, and steam condensate drain valve 4 is opened to enter the drainage ditch. Water collected in filter buffer tank 9 enters the drainage ditch through drain valve 10.

[0053] In this application, the pre-vent valve 6 is used during startup because the gas temperature in the system is unstable at the beginning, so it is used to adjust the gas temperature; the exhaust gas vent valve 12 and the permeate gas vent valve 15 are used during shutdown and replacement; the three valves lead to the vent manifold and vent directly to the sky.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A hydrogen membrane separation device, characterized in that, include: Ammonia washing tower (20); The process gas input pipeline is connected to the lower side wall of the ammonia scrubbing tower (20); the circulating water inlet pipeline is connected to the upper side wall of the ammonia scrubbing tower (20). Separator buffer tank (19); The upper end of the ammonia washing tower (20) is connected to the input end of the separator buffer tank (19); U-shaped heater (18); The top output end of the separator buffer tank (19) is connected to the input end of the U-shaped heater (18); Process gas filter (5); Water filter buffer tank (9); carbon fiber packing (8) is installed inside the upper part of the water filter buffer tank (9); the output end of the U-shaped heater (18) is connected to the input end of the water filter buffer tank (9) through the process gas filter (5); Membrane tube assembly (14); The output end of the water filter buffer tank (9) is connected to the input end of the membrane tube assembly (14); Pervapor filter (16); the first output end of the membrane tube assembly (14) is connected to the input end of the pervapor filter (16); The second output end of the membrane tube assembly (14) is connected to the exhaust gas output pipe and the air inlet of the blower (11) respectively. Steam regulating valve (3); Steam regulating valve (3) is installed on the steam output main pipeline; One end of the steam output main pipeline is connected to the steam input end of the U-shaped heater (18); The exhaust gas self-regulating valve (7) is used to adjust the valve position of the steam regulating valve (3). The exhaust gas self-regulating valve (7) is connected to the pipeline between the process gas filter (5) and the water filter buffer tank (9) after the exhaust gas self-regulating valve (7) is used to adjust the valve position of the steam regulating valve (3).

2. The hydrogen membrane separation device according to claim 1, characterized in that, The lower ends of the ammonia washing tower (20), the separator buffer tank (19), the U-shaped heater (18), and the water filter buffer tank (9) are all connected to the trench via pipes.

3. The hydrogen membrane separation device according to claim 2, characterized in that, A steam condensate drain valve (4) is installed on the lower end pipe of the U-shaped heater (18).

4. The hydrogen membrane separation device according to claim 2, characterized in that, A drain valve (10) is installed on the lower end pipe of the water filter buffer tank (9).

5. The hydrogen membrane separation device according to claim 1, characterized in that, A process gas inlet valve (22) is installed on the process gas input pipeline connected to the ammonia washing tower (20), and a water inlet valve (21) is installed on the circulating water inlet pipeline connected to the ammonia washing tower (20).

6. The hydrogen membrane separation device according to claim 1, characterized in that, A mixed gas inlet valve (2) is provided between the top output end of the separator buffer tank (19) and the input end of the U-shaped heater (18).

7. The hydrogen membrane separation device according to claim 1, characterized in that, The second output end of the membrane tube assembly (14) is connected to the exhaust gas output pipe and is equipped with an exhaust gas main valve (13).

8. The hydrogen membrane separation device according to claim 1, characterized in that, A permeate gas main valve is installed at the output end of the permeate gas filter (16).

9. The hydrogen membrane separation device according to claim 1, characterized in that, The hydrogen membrane separation unit also includes a pre-vent valve (6), a tail gas vent valve (12), and a permeate vent valve (15). The first end of the pre-vent valve (6) is connected to the pipeline between the process gas filter (5) and the filter water buffer tank (9) and is located near the output end of the process gas filter (5). The second end of the pre-vent valve (6) is connected to the first end of the permeate vent valve (15) through a pipeline. The second end of the permeate vent valve (15) is connected to the pipeline between the membrane tube assembly (14) and the permeate filter (16). The pipeline between the pre-vent valve (6) and the permeate vent valve (15) is also connected to the outside. The first end of the tail gas vent valve (12) is connected to the pipeline between the pre-vent valve (6) and the permeate vent valve (15). The first end of the tail gas vent valve (12) is connected to the pipeline between the membrane tube assembly (14) and the tail gas main valve (13).

10. The hydrogen membrane separation device according to claim 1, characterized in that, A main steam valve (1) is also installed on the main steam output pipeline at a location away from the steam regulating valve (3) and the U-shaped heater (18).

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