CN210656147U - Palladium membrane hydrogen purification device - Google Patents
Palladium membrane hydrogen purification device Download PDFInfo
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- CN210656147U CN210656147U CN201921738627.1U CN201921738627U CN210656147U CN 210656147 U CN210656147 U CN 210656147U CN 201921738627 U CN201921738627 U CN 201921738627U CN 210656147 U CN210656147 U CN 210656147U
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Abstract
The utility model belongs to the technical field of hydrogen purification, in particular to a palladium membrane hydrogen purification device, which comprises a palladium tube purification assembly consisting of a palladium tube and a shell, wherein the palladium tube is positioned inside the shell and comprises a raw material gas pipeline, an excess gas seepage pipeline and a product hydrogen pipeline; a product hydrogen line is connected to the end side wall of the housing for receiving the separated hydrogen gas diffused from the palladium tube. The palladium membrane hydrogen purification device provided by the utility model utilizes the palladium membrane to purify hydrogen, and has the advantages of small occupied area, low energy consumption, small maintenance amount and convenient operation; the palladium membrane heat source comes from the hydrogen production device, and electric energy is not used, so that reasonable utilization of energy is realized.
Description
Technical Field
The utility model belongs to the technical field of the hydrogen purification, concretely relates to palladium membrane hydrogen purification device.
Background
The hydrogen purification of the domestic and overseas natural gas hydrogen production process adopts a pressure swing adsorption process, a pressure swing adsorption purification device comprises a plurality of containers, an adsorbent, a control valve and the like, the equipment is large in investment, and the control system is complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a palladium membrane hydrogen purification device, which utilizes a palladium membrane to purify hydrogen, and has the advantages of small occupied area, low energy consumption, small maintenance amount and convenient operation; the palladium membrane heat source comes from the hydrogen production device, and electric energy is not used, so that reasonable utilization of energy is realized.
The purpose of the utility model is realized like this: a palladium membrane hydrogen purification device comprises a palladium tube purification assembly consisting of a palladium tube and a shell, wherein the palladium tube is positioned in the shell, and the palladium tube purification assembly also comprises a raw material gas pipeline, an excess gas permeation pipeline and a product hydrogen pipeline; the product hydrogen pipeline is connected with the side wall of the tail end of the shell and is used for receiving the separated hydrogen diffused from the palladium tube; the device is characterized in that a first heat exchanger and a second heat exchanger are arranged on the raw material gas pipeline, the residual gas permeation pipeline and the product hydrogen pipeline are preheated for raw material gas through the first heat exchanger respectively, the second heat exchanger is located on the rear side of the first heat exchanger, and the second heat exchanger is connected with a heating steam pipeline from a natural gas hydrogen production conversion working section.
The device further comprises a nitrogen pipeline, wherein the nitrogen pipeline is divided into a pipeline replacement branch line and a temperature raising medium branch line, the pipeline replacement branch line is converged into the raw material gas pipeline at the inlet of the first heat exchanger, and the temperature raising medium branch line is connected to the side wall of the head end of the shell.
Furthermore, the heating steam pipeline is connected with a gas-liquid separation tank after coming out of the second heat exchanger.
Furthermore, the palladium tubes and the shell form a unit, and a plurality of palladium tube purification components are arranged in parallel.
Further, the product hydrogen pipeline is provided with a sampling analysis port.
Compared with the prior art, the utility model outstanding and profitable technological effect is:
hydrogen and its isotopes can easily permeate palladium membranes, while any other gas is trapped, and thus palladium membranes can be used for hydrogen purification, where the permeation of hydrogen through palladium membranes follows a dissolution-diffusion mechanism:
1) hydrogen is firstly chemically adsorbed on the surface of the palladium membrane and dissociated into hydrogen atoms;
2) hydrogen atoms are dissolved in the palladium membrane and enter metal atom lattice gaps of palladium or palladium alloy;
3) hydrogen atoms diffuse from one side of the palladium membrane to the other;
4) the hydrogen atoms are evolved from the palladium membrane surface and recombine into hydrogen molecules.
The method is characterized in that a metal palladium composite membrane is adopted to separate hydrogen, hydrogen molecules are dissociated into hydrogen atoms on the high-pressure side of the palladium membrane by utilizing palladium pairs at the temperature of 300-500 ℃, the hydrogen atoms are dissolved in palladium and diffused to the low-pressure side, and then the hydrogen atoms are combined into hydrogen molecules. The palladium membrane purification technology has the advantages of less investment, small occupied area, low energy consumption, small maintenance amount and convenient operation.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a structural diagram of the palladium tube and the shell in the embodiment of the present invention.
Reference numerals: 1. a feed gas line; 2. a nitrogen line; 2a, pipeline replacement branch lines; 2b, a heating medium branch line; 3. heating the steam line; 4. a gas-liquid separation tank; 5. a palladium tube purification assembly; 5a, a shell; 5b, a palladium tube; 6. a retentate gas line; 7. a product hydrogen line; 8. a first heat exchanger; 9. a second heat exchanger.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings.
A palladium membrane hydrogen purification device, which combines the figure 1 and the figure 2, comprises a palladium tube purification component 5 composed of a palladium tube 5b and a shell 5a, wherein the palladium tube is positioned inside the shell 5 a. Wherein, the raw material gas pipeline 1 is connected with the inlet end of the palladium tube 5b, and the mixed gas in the raw material gas pipeline comes from a natural gas hydrogen production conversion section; the residual gas pipeline 6 is connected to the outlet end of the palladium tube 5b and used for receiving residual waste gas; the product hydrogen pipeline 7 is connected to the side wall of the tail end of the shell 5a and is used for receiving the separated hydrogen diffused from the palladium tube 5b and is provided with a sampling analysis port; the raw gas pipeline 1 is provided with a first heat exchanger 8 and a second heat exchanger 9, the residual gas permeation pipeline 6 and the product hydrogen pipeline 7 are preheated by raw gas through the first heat exchanger 8 respectively, the second heat exchanger 9 is positioned at the rear side of the first heat exchanger 8, and the second heat exchanger 9 is connected with a heating steam pipeline 3 from a natural gas hydrogen production conversion working section. The heating steam line 3 is connected to a gas-liquid separation tank 4 after coming out of the second heat exchanger 9. The steam and the condensed water generated by the gas-liquid separation tank 4 can be returned to the natural gas hydrogen production conversion section.
The nitrogen pipeline 2 is divided into a pipeline replacement branch line 2a and a temperature raising medium branch line 2b, and the pipeline replacement branch line 2a converges into the raw material gas pipeline 1 at the inlet of the first heat exchanger 8 for pipeline replacement during driving. The heating medium branch line 2b is connected to the side wall of the head end of the shell 5a and is used as medium nitrogen to be filled between the shell 5a and the palladium tube when the palladium membrane component is heated.
As shown in fig. 2, palladium tube 5b and housing 5a form a unit, and several may be arranged in parallel in palladium tube purification assembly 5.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a palladium membrane hydrogen purification device, includes the palladium pipe purification subassembly that constitutes by palladium pipe and casing, and the palladium pipe is located inside the casing, its characterized in that: the device also comprises a raw material gas pipeline, a residual gas permeation pipeline and a product hydrogen pipeline, wherein the raw material gas pipeline is connected to the inlet end of the palladium tube, and the residual gas permeation pipeline is connected to the outlet end of the palladium tube; the product hydrogen pipeline is connected with the side wall of the tail end of the shell and is used for receiving the separated hydrogen diffused from the palladium tube; the device is characterized in that a first heat exchanger and a second heat exchanger are arranged on the raw material gas pipeline, the residual gas permeation pipeline and the product hydrogen pipeline are preheated for raw material gas through the first heat exchanger respectively, the second heat exchanger is located on the rear side of the first heat exchanger, and the second heat exchanger is connected with a heating steam pipeline from a natural gas hydrogen production conversion working section.
2. The palladium membrane hydrogen purification device according to claim 1, wherein: the device also comprises a nitrogen pipeline, wherein the nitrogen pipeline is divided into a pipeline replacement branch line and a temperature raising medium branch line, the pipeline replacement branch line is converged into the raw material gas pipeline at the inlet of the first heat exchanger, and the temperature raising medium branch line is connected to the side wall of the head end of the shell.
3. The palladium membrane hydrogen purification device according to claim 1, wherein: and the heating steam pipeline is connected with a gas-liquid separation tank after coming out of the second heat exchanger.
4. The palladium membrane hydrogen purification device according to claim 1, wherein: the palladium tubes and the shell form a unit, and a plurality of palladium tube purification components are arranged in parallel.
5. The palladium membrane hydrogen purification device according to claim 1, wherein: the product hydrogen pipeline is provided with a sampling analysis port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921738627.1U CN210656147U (en) | 2019-10-16 | 2019-10-16 | Palladium membrane hydrogen purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921738627.1U CN210656147U (en) | 2019-10-16 | 2019-10-16 | Palladium membrane hydrogen purification device |
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| Publication Number | Publication Date |
|---|---|
| CN210656147U true CN210656147U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921738627.1U Active CN210656147U (en) | 2019-10-16 | 2019-10-16 | Palladium membrane hydrogen purification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083093A (en) * | 2020-09-02 | 2020-12-15 | 北京市煤气热力工程设计院有限公司 | Natural gas valve station hydrogen concentration control method, equipment, terminal and storage medium |
-
2019
- 2019-10-16 CN CN201921738627.1U patent/CN210656147U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083093A (en) * | 2020-09-02 | 2020-12-15 | 北京市煤气热力工程设计院有限公司 | Natural gas valve station hydrogen concentration control method, equipment, terminal and storage medium |
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Address after: 317000 No. 755, Dongdu South Road, Linhai City, Taizhou City, Zhejiang Province (for office use only) (self declaration) Patentee after: Zhejiang Haichang Gas Co.,Ltd. Address before: 317000 Southeast of Line A3, Linhai Park, Chemical API Base, Linhai District, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG HAICHANG GAS Co.,Ltd. |