CN216171191U - Pressure swing adsorption hydrogen production tail gas recycle device - Google Patents
Pressure swing adsorption hydrogen production tail gas recycle device Download PDFInfo
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- CN216171191U CN216171191U CN202122740456.XU CN202122740456U CN216171191U CN 216171191 U CN216171191 U CN 216171191U CN 202122740456 U CN202122740456 U CN 202122740456U CN 216171191 U CN216171191 U CN 216171191U
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Abstract
The utility model relates to a pressure swing adsorption hydrogen production tail gas recycling device which comprises a first exhaust pipe, a second exhaust pipe, a gas buffer tank and a third exhaust pipe, wherein the first exhaust pipe can be communicated with a tail gas outlet of a pressure swing adsorption hydrogen production device and is provided with a first valve capable of being opened or closed, the second exhaust pipe can be communicated with the tail gas outlet of the pressure swing adsorption hydrogen production device and is provided with a second valve capable of being opened or closed, the gas buffer tank is communicated with a gas outlet of the second exhaust pipe, the third exhaust pipe is communicated with a gas outlet of the gas buffer tank and is provided with a gas pressure regulating valve, and a gas outlet of the third exhaust pipe can be communicated with a boiler and/or an auxiliary hydrogen production purification device. The pressure swing adsorption hydrogen production tail gas recycling device provided by the utility model can recycle hydrogen production tail gas and recycle the hydrogen production tail gas widely, so that the production energy consumption is greatly reduced, and the device system is safe and reasonable in arrangement, free of pollution, small in scale and low in price.
Description
Technical Field
The utility model particularly relates to a pressure swing adsorption hydrogen production tail gas recycling device.
Background
The Pressure Swing Adsorption (PSA) hydrogen production process is used as a preparation process of hydrogen energy, has short cycle, high utilization rate of the adsorbent and simple and convenient operation, and is the most widely applied hydrogen preparation method at present. In the traditional PSA technology, the tail gas after the bed washing in the pressure swing adsorption hydrogen production device is completely and directly discharged to the atmosphere in the emptying period, the tail gas of the pressure swing adsorption hydrogen production device mainly comprises hydrogen and carbon dioxide, the hydrogen in the pressure swing adsorption hydrogen production device cannot be effectively recycled, and if all the tail gas is collected and then used as fuel, the available heat value is low, and the economic effect is not obvious.
Disclosure of Invention
The utility model aims to provide a pressure swing adsorption hydrogen production tail gas recycling device.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the pressure swing adsorption hydrogen production tail gas recycling device comprises a first exhaust pipe, a second exhaust pipe, a gas buffer tank and a third exhaust pipe, wherein the first exhaust pipe can be communicated with a tail gas outlet of the pressure swing adsorption hydrogen production device and is provided with a first valve capable of being opened or closed, the second exhaust pipe can be communicated with the tail gas outlet of the pressure swing adsorption hydrogen production device and is provided with a second valve capable of being opened or closed, the gas buffer tank is communicated with a gas outlet of the second exhaust pipe, the third exhaust pipe is communicated with a gas outlet of the gas buffer tank and is provided with a gas pressure regulating valve, and the gas outlet of the third exhaust pipe can be communicated with a boiler and/or an auxiliary hydrogen production purification device.
Specifically, the air outlet of the first exhaust pipe is communicated with the atmospheric pressure.
Tail gas of pressure swing adsorption hydrogen production plant is H2And CO2The mixed gas mainly used as fuel after being collected can utilize low heat value and basically has no economic benefit, the tail gas can be divided into two sections according to the discharge pressure, the hydrogen content of the first section of tail gas is higher, and the tail gas can enter a gas buffer tank through a second exhaust pipe provided with a second valve and then returns to the gas buffer tankRecycling, namely adjusting the gas pressure through a gas pressure adjusting valve, conveying the gas to a boiler for combustion (heat recovery) or pressurizing, conveying the gas to a byproduct hydrogen purification device for re-purification and recycling, wherein the second section of tail gas has low hydrogen content and mainly contains CO2The gas can be directly discharged into the atmosphere through a first exhaust pipe provided with a first valve until the bed pressure is equal to the atmospheric pressure.
Specifically, the pressure swing adsorption hydrogen production tail gas recycling device has a first working state and a second working state, when the pressure swing adsorption hydrogen production tail gas recycling device is in the first working state, the first valve is in a closed state, and the second valve is in an open state; when the pressure swing adsorption hydrogen production tail gas recycling device is in the second working state, the first valve is in an open state, and the second valve is in a closed state.
Further, when the pressure of the tail gas discharged by the pressure swing adsorption hydrogen production device is more than 1.5kg/cm2When the pressure swing adsorption hydrogen production tail gas recycling device is in the first working state, the tail gas discharge pressure of the pressure swing adsorption hydrogen production device is less than or equal to 1.5kg/cm2And when the pressure swing adsorption hydrogen production tail gas recycling device is in the second working state.
When the pressure swing adsorption hydrogen production tail gas recycling device is in the second working state, the tail gas is directly discharged through the first exhaust pipe until the pressure of the bed layer of the pressure swing adsorption hydrogen production device is equal to the atmospheric pressure.
Specifically, the pressure swing adsorption hydrogen production tail gas recycling device further comprises a remote control system capable of controlling the first valve and the second valve to be in an open state or a closed state, and the whole process automation can be realized by program design and matching with a pressure control system of the pressure swing adsorption hydrogen production device.
Of course, the remote control system can be connected with a pressure control device or a pressure sensor of the pressure swing adsorption hydrogen production device through signals, and the working state of the pressure swing adsorption hydrogen production tail gas recycling device can be adjusted in time according to the pressure.
Specifically, a pipeline for communicating the gas pressure regulating valve with the boiler and/or the byproduct hydrogen purification device is provided with a pressure sensor, and the pressure sensor is positioned at the downstream of the gas pressure regulating valve.
Furthermore, the pressure sensor is in signal connection with the gas pressure regulating valve, so that the gas pressure in the pipeline can be regulated and controlled in real time.
Specifically, the gas inlet of the second exhaust pipe can be communicated with a tail gas outlet of a pressure swing adsorption hydrogen production device, the gas outlet of the second exhaust pipe is communicated with the gas inlet of the gas buffer tank, the gas inlet of the first exhaust pipe is communicated with the pipe wall of the second exhaust pipe, the gas outlet of the first exhaust pipe is communicated with the atmospheric pressure, and the second valve is positioned on the second exhaust pipe between the gas inlet of the gas buffer tank and the joint of the first exhaust pipe and the second exhaust pipe;
the third exhaust pipe comprises a first section of third exhaust pipe communicated with the gas outlet of the gas buffer tank, a second section of third exhaust pipe communicated with the first section of third exhaust pipe, a third section of third exhaust pipe used for communicating the second section of third exhaust pipe with the boiler, and a fourth section of third exhaust pipe used for communicating the second section of third exhaust pipe with the byproduct hydrogen purification device.
Specifically, the gas pressure regulating valve is arranged on the first section third exhaust pipe.
Specifically, the third section of third exhaust pipe and the fourth section of third exhaust pipe are respectively provided with a switch valve.
Furthermore, the first exhaust pipe, the second exhaust pipe, the gas buffer tank and the third exhaust pipe are assembled into an integrated device. The workload of on-site installation and disassembly of the equipment can be reduced, and the use is more flexible and convenient. All the devices of the pressure swing adsorption hydrogen production tail gas recycling device can be arranged on one base.
Still further, the integrated device still including be used for the integrated installation first blast pipe the second blast pipe the gas buffer tank the cabinet body of third blast pipe, the cabinet body be equipped with the air inlet of first blast pipe and the air inlet of second blast pipe be linked together the air inlet, with the first gas outlet that is linked together of the gas outlet of first blast pipe and with the second gas outlet that is linked together of the gas outlet of third blast pipe.
During installation, the gas inlet is connected with the pressure swing adsorption tail gas pipeline, and the second gas outlet is connected with a gas use point (a boiler or a byproduct hydrogen purification device) through a pipeline.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The scope of the present invention is not limited to the embodiments in which the above-described features are combined in specific combinations, and also covers other embodiments in which the above-described features or their equivalents are combined arbitrarily. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the pressure swing adsorption hydrogen production tail gas recycling device provided by the utility model can recycle hydrogen production tail gas and recycle the hydrogen production tail gas widely, so that the production energy consumption is greatly reduced, and the equipment system is safe and reasonable in arrangement, free of pollution, small in scale and low in price.
Drawings
FIG. 1 is a schematic structural diagram of a pressure swing adsorption hydrogen production tail gas recycling device of an embodiment;
in the above drawings: 1. a pressure swing adsorption hydrogen production device 11 and a hydrogen outlet; 12. a tail gas outlet; 2. a first exhaust pipe 3 and a second exhaust pipe; 41. a first valve; 42. a second valve; 5. a gas buffer tank; 61. a first section of a third exhaust pipe; 62. a second section of third exhaust pipe; 63. a third section of a third exhaust pipe; 64. a fourth section of a third exhaust pipe; 7. a gas pressure regulating valve; 8. a pressure sensor; 9. a boiler; 10. a byproduct hydrogen purification device.
Detailed Description
The utility model will be further described with reference to examples of embodiments shown in the drawings to which the utility model is attached.
As shown in fig. 1, the pressure swing adsorption hydrogen production tail gas recycling device of this embodiment includes a first exhaust pipe 2 provided with a first valve 41 and capable of communicating with a tail gas outlet 12 of the pressure swing adsorption hydrogen production device 1, a second exhaust pipe 3 provided with a second valve 42 and capable of communicating with the tail gas outlet 12 of the pressure swing adsorption hydrogen production device 1, a gas buffer tank 5 communicated with a gas outlet of the second exhaust pipe 3, and a third exhaust pipe provided with a gas pressure regulating valve 7 and communicated with a gas outlet of the gas buffer tank 5, wherein the gas outlet of the third exhaust pipe is capable of communicating with a boiler 9 and/or an auxiliary hydrogen production purification device 10.
In fig. 1, the pressure swing adsorption hydrogen production apparatus 1 is located at the leftmost side, and has a hydrogen outlet 11 and a tail gas outlet 12, and when the tail gas outlet 12 is in an open state, the hydrogen outlet 11 is closed. One end of the second exhaust pipe 3 is a gas inlet, the other end is a gas outlet, the tail gas outlet 12 is communicated with the gas inlet of the second exhaust pipe 3, the gas outlet of the second exhaust pipe 3 is communicated with the gas inlet of the gas buffer tank 5, the gas outlet of the gas buffer tank 5 is communicated with the gas inlet of the first section of third exhaust pipe 61, the gas outlet of the first section of third exhaust pipe 61 is communicated with the gas inlet of the second section of third exhaust pipe 62, the second section of third exhaust pipe 62 is provided with two gas outlets, one of the gas outlets is communicated with the third section of third exhaust pipe 63, the other gas outlet is communicated with the fourth section of third exhaust pipe 64, the gas outlet of the third section of third exhaust pipe 63 can be communicated with the boiler 9, and the gas outlet of the fourth section of third exhaust pipe 64 can be communicated with the byproduct hydrogen purification device 10.
One end of the first exhaust pipe 2 is an air inlet, the other end of the first exhaust pipe is an air outlet, the air outlet of the first exhaust pipe 2 is communicated with the atmospheric pressure, the air inlet of the first exhaust pipe 2 is communicated with the second exhaust pipe 3, and the joint is positioned on the pipe wall of the second exhaust pipe 3.
The first exhaust pipe 2 is provided with a first valve 41 capable of being opened or closed, and the second exhaust pipe 3 between the communication position of the first exhaust pipe 2 and the second exhaust pipe 3 and the gas inlet of the gas buffer tank 5 is provided with a second valve 42 capable of being opened or closed.
In this embodiment, the first valve 41 and the second valve 42 are programmable valves, and the embodiment further includes a remote control system connected to the first valve 41 and the second valve 42 in signal connection and capable of controlling the opening and closing of the first valve 41 and the second valve 42. The remote control system can be connected with a pressure control device or a pressure sensor of the pressure swing adsorption hydrogen production device 1 through signals, and the working state of the pressure swing adsorption hydrogen production tail gas recycling device can be adjusted in time according to the pressure.
The pressure swing adsorption hydrogen production tail gas recycling device of the embodiment has a first working state and a second working state, when the pressure swing adsorption hydrogen production tail gas recycling device is in the first working state, the first valve 41 is in a closed state, and the second valve 42 is in an open state; when the pressure swing adsorption hydrogen production tail gas recycling device is in the second working state, the first valve 41 is in an open state, and the second valve 42 is in a closed state.
Of course, in other embodiments, the remote control system may not be used and the switches controlling the first and second valves 41 and 42 may be considered to be controlled.
The gas pressure regulating valve 7 is arranged on the first section of the third exhaust pipe 61, the pressure sensor 8 is arranged on the first section of the third exhaust pipe 61 between the gas pressure regulating valve 7 and the second section of the third exhaust pipe 62, namely, the pressure sensor 8 is positioned at the downstream of the gas pressure regulating valve 7, and the pressure sensor 8 is in signal connection with the gas pressure regulating valve 7 and used for controlling the gas flow in the third exhaust pipe.
In this embodiment, the first exhaust pipe 2, the second exhaust pipe 3, the gas buffer tank 5 and the third exhaust pipe may be integrated in a cabinet, and the cabinet is provided with a gas inlet communicated with the gas inlet of the second exhaust pipe 3, a first gas outlet communicated with the gas outlet of the first exhaust pipe 2, a second gas outlet communicated with the gas outlet of the third section of third exhaust pipe 63, and a third gas outlet communicated with the gas outlet of the fourth section of third exhaust pipe 64. In other embodiments, an integrated cabinet may be used in accordance with a particular piping arrangement. During installation, the gas inlet is only required to be connected with a pressure swing adsorption tail gas pipeline, and the second gas outlet and/or the third gas outlet are/is connected with a gas using point through a pipeline.
The operation process of the pressure swing adsorption hydrogen production tail gas recycling device of the embodiment is as follows:
after the pressure swing adsorption hydrogen production tail gas recycling device is connected and assembled with the pressure swing adsorption hydrogen production device 1 and the gas use point device, the first valve 41 and the second valve 42 are both in a closed state as an initial state, and the bed pressure of the pressure swing adsorption hydrogen production device 1 is about 5.5kg/cm at the moment2When the hydrogen recovery device works, the first valve 41 is closed, the second valve 42 is opened, the first section of tail gas containing a large amount of hydrogen is introduced into the gas buffer tank 5, the gas pressure regulating valve 7 is adjusted according to the requirements of a use point, and the first section of tail gas is conveyed to the boiler 9 for combustion (heat recovery) or purified after pressurization to obtain high-purity hydrogen for recycling; when the pressure of the pressure swing adsorption hydrogen production device 1 is reduced to 1.5kg/cm2When the first valve 41 is opened, the second valve 42 is closed, and the tail gas with less hydrogen content in the second section is directly discharged to the atmosphere until the pressure of the bed layer in the pressure swing adsorption hydrogen production device 1 is equal to the atmospheric pressure, and the tail gas is discharged.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The pressure swing adsorption hydrogen production tail gas recycling device is characterized by comprising a first exhaust pipe (2) which can be communicated with a tail gas outlet (12) of a pressure swing adsorption hydrogen production device (1) and is provided with a first valve (41) capable of being opened or closed, a second exhaust pipe (3) which can be communicated with the tail gas outlet (12) of the pressure swing adsorption hydrogen production device (1) and is provided with a second valve (42) capable of being opened or closed, a gas buffer tank (5) communicated with a gas outlet of the second exhaust pipe (3), and a third exhaust pipe which is communicated with a gas outlet of the gas buffer tank (5) and is provided with a gas pressure regulating valve (7), the gas outlet of the third exhaust pipe can be communicated with a boiler (9) and/or a byproduct hydrogen purification device (10), and the gas outlet of the first exhaust pipe (2) is communicated with the atmospheric pressure.
2. The device for recycling tail gas from hydrogen production by pressure swing adsorption according to claim 1, wherein the device for recycling tail gas from hydrogen production by pressure swing adsorption has a first working state and a second working state, when the device for recycling tail gas from hydrogen production by pressure swing adsorption is in the first working state, the first valve (41) is in a closed state, and the second valve (42) is in an open state; when the pressure swing adsorption hydrogen production tail gas recycling device is in the second working state, the first valve (41) is in an open state, and the second valve (42) is in a closed state.
3. The tail gas recycling device for hydrogen production by pressure swing adsorption as claimed in claim 2, characterized in that when the tail gas discharge pressure of the hydrogen production device (1) by pressure swing adsorption is more than 1.5kg/cm2During the process, the pressure swing adsorption hydrogen production tail gas recycling device is arranged at the positionIn the first working state, when the tail gas discharge pressure of the pressure swing adsorption hydrogen production device (1) is less than or equal to 1.5kg/cm2And when the pressure swing adsorption hydrogen production tail gas recycling device is in the second working state.
4. The tail gas recycling device for hydrogen production through pressure swing adsorption as claimed in claim 1, characterized in that the tail gas recycling device for hydrogen production through pressure swing adsorption further comprises a remote control system capable of controlling the first valve (41) and the second valve (42) to be in an open state or a closed state.
5. The pressure swing adsorption hydrogen production tail gas recycling device according to claim 1, characterized in that a pressure sensor (8) is arranged on the third exhaust pipe, and the pressure sensor (8) is located downstream of the gas pressure regulating valve (7).
6. The pressure swing adsorption hydrogen production tail gas recycling device according to claim 5, characterized in that the pressure sensor (8) is in signal connection with the gas pressure regulating valve (7).
7. The tail gas recycling device for hydrogen production by pressure swing adsorption according to claim 1, characterized in that the gas inlet of the second exhaust pipe (3) can be communicated with the tail gas outlet (12) of the hydrogen production device (1) by pressure swing adsorption, the gas outlet of the second exhaust pipe (3) is communicated with the gas inlet of the gas buffer tank (5), the gas inlet of the first exhaust pipe (2) is communicated with the pipe wall of the second exhaust pipe (3), the gas outlet of the first exhaust pipe (2) is communicated with the atmospheric pressure, and the second valve (42) is located on the second exhaust pipe (3) between the gas inlet of the gas buffer tank (5) and the connection between the first exhaust pipe (2) and the second exhaust pipe (3);
the third exhaust pipe comprises a first section of third exhaust pipe (61) communicated with the gas outlet of the gas buffer tank (5), a second section of third exhaust pipe (62) communicated with the first section of third exhaust pipe (61), a third section of third exhaust pipe (63) used for communicating the second section of third exhaust pipe (62) with the boiler (9), and a fourth section of third exhaust pipe (64) used for communicating the second section of third exhaust pipe (62) with the by-product hydrogen purification device (10).
8. The tail gas recycling device for hydrogen production by pressure swing adsorption according to claim 7, characterized in that the gas pressure regulating valve (7) is arranged on the first section of the third exhaust pipe (61); and switch valves are respectively arranged on the third section of third exhaust pipe (63) and the fourth section of third exhaust pipe (64).
9. The tail gas recycling device for hydrogen production by pressure swing adsorption according to claim 1, characterized in that the first exhaust pipe (2), the second exhaust pipe (3), the gas buffer tank (5) and the third exhaust pipe are assembled into an integrated device.
10. The tail gas recycling device for hydrogen production through pressure swing adsorption according to claim 9, characterized in that the integrated device further comprises a cabinet body for integrally installing the first exhaust pipe (2), the second exhaust pipe (3), the gas buffer tank (5) and the third exhaust pipe, wherein the cabinet body is provided with a gas inlet communicated with the gas inlet of the first exhaust pipe (2) and the gas inlet of the second exhaust pipe (3), a first gas outlet communicated with the gas outlet of the first exhaust pipe (2) and a second gas outlet communicated with the gas outlet of the third exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122740456.XU CN216171191U (en) | 2021-11-10 | 2021-11-10 | Pressure swing adsorption hydrogen production tail gas recycle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122740456.XU CN216171191U (en) | 2021-11-10 | 2021-11-10 | Pressure swing adsorption hydrogen production tail gas recycle device |
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| Publication Number | Publication Date |
|---|---|
| CN216171191U true CN216171191U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122740456.XU Active CN216171191U (en) | 2021-11-10 | 2021-11-10 | Pressure swing adsorption hydrogen production tail gas recycle device |
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| CN (1) | CN216171191U (en) |
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2021
- 2021-11-10 CN CN202122740456.XU patent/CN216171191U/en active Active
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