CN213221585U - Palladium membrane component and purifier with same - Google Patents

Abstract

The utility model provides a palladium membrane module and have purifier of this palladium membrane module, palladium membrane module includes: the supporting body is made of stainless steel materials; the isolation layer is made of ceramic materials and is arranged on the surface of the support body; and the palladium membrane is arranged on one side of the isolating layer, which is deviated from the support body. Compared with the prior art, the utility model discloses palladium membrane module not only makes palladium membrane be difficult for droing through the isolation layer that sets up to make with ceramic material, can not produce the infiltration phenomenon moreover to reduce palladium membrane's consumption rate, and then effectively improved palladium membrane module's life.

Description

Palladium membrane component and purifier with same

Technical Field

The utility model belongs to the technical field of hydrogen purification, especially, relate to a palladium membrane module and have purifier of this palladium membrane module for hydrogen purification.

Background

In recent years, with the rapid development of industries such as hydrogen fuel cells, steel, semiconductors, microelectronics, petrochemical industry and the like, the demand of high-purity hydrogen is rapidly increased, and the research on the production and separation technology of high-purity hydrogen is strongly promoted. The palladium and palladium alloy membrane has a series of advantages of excellent hydrogen permeation selectivity, good mechanical and thermal stability and the like based on the characteristics of the material, and is deeply and widely researched.

At present, palladium membrane purification technology is widely applied to the preparation of pure hydrogen and high-purity hydrogen. The commercial development of palladium membranes has gone through the process from pure palladium membranes to palladium alloy membranes. Since the tubular palladium membrane has a higher specific separation area than the sheet-shaped palladium membrane, which is advantageous for improving the integration of the palladium membrane module, the shape of the membrane is also developed from the original sheet shape to the now-commonly used tubular shape.

The tubular palladium membrane is divided into an unsupported type and a supported type. The unsupported tubular palladium membrane is prepared mainly through smelting, casting and rolling process, which includes mixing palladium or palladium alloy material in certain proportion, smelting and casting at high temperature to obtain cast ingot, cold and hot forging to form tube blank, and repeated cold rolling and annealing to obtain thin wall tube of required thickness. The unsupported tubular palladium membrane has the advantages of stable performance, good selectivity to hydrogen, poor mechanical strength, low hydrogen permeation rate, large pressure loss of hydrogen and high use cost. The above disadvantages limit the application of unsupported tubular palladium membranes to the technical field of low flow, low pressure, high purity hydrogen purification.

The supported tubular palladium membrane refers to metal palladium or an alloy membrane thereof which is loaded on the surface of a porous tubular support body through a physical or chemical method so as to integrate the metal palladium and the alloy membrane. The support is usually made of tubular porous ceramics, porous stainless steel, porous glass and the like. The preparation method of the supported tubular palladium membrane mainly comprises a physical vapor deposition method, a chemical vapor deposition method, a spray pyrolysis method, electroplating, chemical plating and the like. The support type tubular palladium membrane effectively solves the problem of poor mechanical strength of the palladium membrane tube because the support body is made of porous materials made of metal, ceramic and the like. Meanwhile, the palladium membrane or the palladium alloy membrane obtained by the preparation method has smaller thickness, so that the support type tubular palladium membrane also has the advantages of high hydrogen permeation rate, small hydrogen pressure loss, low use cost and the like. The support type tubular palladium membrane prepared by the method has the greatest defects that the adhesion force between the palladium membrane and the support body is poor, the palladium membrane is easy to fall off, and the service life of the support type tubular palladium membrane is seriously influenced. And when the support body is a stainless steel pipe, palladium metal in the palladium membrane can gradually permeate into the stainless steel pipe, so that the palladium membrane is continuously consumed, and the service life of the palladium membrane is further shortened. This is due to the close contact between the metal and the metal, and the thermal movement of the metal molecules causes the occurrence of the percolation phenomenon.

In view of the above problems, there is a need to provide a new palladium membrane module to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a palladium membrane module and have this palladium membrane module's clarifier, palladium membrane of palladium membrane module not only is difficult for droing, can not produce the infiltration phenomenon moreover to reduce palladium membrane's consumption rate, and then effectively improved palladium membrane module's life.

In order to achieve the above object, the present invention provides a palladium membrane module, including: the supporting body is made of stainless steel materials; the isolation layer is made of ceramic materials and is arranged on the surface of the support body; and the palladium membrane is arranged on one side of the isolating layer, which is deviated from the support body.

As a further improvement of the utility model, the isolation layer is a film made of titanium nitride and permeable to gas.

As a further improvement of the present invention, the supporting body is tubular, and one end of the supporting body is sealed, so that the supporting body is a blind pipe; the isolation layer is attached to the outer surface of the support body.

As a further improvement of the present invention, the support body includes a connecting portion and a load portion; the load part is a powder metallurgy stainless steel pipe and can permeate gas; the isolation layer is disposed on an outer surface of the load portion.

As a further improvement of the utility model, the connecting part is a compact stainless steel pipe made of stainless steel material.

In order to achieve the above object, the utility model also provides a purifier, include palladium membrane module, fixed palladium membrane module's fixed disk and accept the casing of palladium membrane module and fixed disk, palladium membrane module include with the supporter that stainless steel material made, make with ceramic material and set up in the isolation layer on supporter surface and set up in the isolation layer deviates from the palladium membrane of supporter one side.

As a further improvement of the utility model, the isolation layer is a film made of titanium nitride and permeable to gas.

As a further improvement of the present invention, the supporting body is tubular and includes a connecting portion and a loading portion; the load part is a powder metallurgy stainless steel pipe and can permeate gas; the isolation layer is disposed on an outer surface of the load portion.

As a further improvement of the present invention, the fixing plate is provided at the junction of the connecting portion and the load portion, and a fixing hole for the support to pass through and a vent for the gas to pass through are provided thereon.

As a further improvement of the utility model, the length ratio of the connecting part and the load part is between 1:5 and 1: 6.

The utility model has the advantages that: the utility model discloses palladium membrane module not only makes palladium membrane be difficult for droing through the isolation layer that sets up to make with ceramic material, can not produce the infiltration phenomenon moreover to reduced palladium membrane's consumption rate, and then effectively improved palladium membrane module's life.

Drawings

Fig. 1 is a schematic structural diagram of the palladium membrane module of the present invention.

Fig. 2 is a schematic view of the structure of the purifier.

Fig. 3 is a cross-sectional view of the purifier shown in fig. 2.

Fig. 4 is a schematic structural view of the mounting plate.

Fig. 5 is a schematic structural view of the fixed disk.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the present invention discloses a palladium membrane module 100, which includes a support 10, an isolation layer 20 disposed on the surface of the support 10, and a palladium membrane 30 disposed on one side of the isolation layer 20 away from the support 10.

Referring to fig. 1, the support body 10 is a support tube made of stainless steel material, and one end of the support tube is sealed, so that the support body 10 is a blind tube. The support body 10 includes a connection portion 11, a load portion 12 connected to the connection portion 11, and a receiving cavity 13 surrounded by the connection portion 11 and the load portion 12. The connection 11 is a dense stainless steel pipe made of a stainless steel material and does not allow gas to permeate therethrough. The load portion 12 is a powder metallurgy stainless steel pipe and allows gas to permeate therethrough. The powder metallurgy stainless steel pipe is generally formed by pressing stainless steel powder with the grain size of 0.45-1 micron and sintering at high temperature, and then the surface of the powder metallurgy stainless steel pipe is plated with the palladium film 30 after surface cleaning. In the present embodiment, the support body 10 is a blind pipe, but in other embodiments, the support body 10 may be a through pipe or a sheet-shaped support sheet.

Referring to fig. 1, the isolation layer 20 is a thin film made of a ceramic material and allowing gas to permeate therethrough, and is disposed on an outer surface of the load portion 12. Preferably, the isolation layer 20 is made of a cermet material. In the present embodiment, the isolation layer 20 is a thin film made of titanium nitride and allows gas to permeate therethrough. The palladium membrane 30 is plated on the side of the isolation layer 20 facing away from the support 10. The palladium membrane 30 may be a pure palladium membrane or an alloy palladium membrane. Because the palladium membrane 30 is plated on the isolation layer 20, the isolation layer 20 has better adhesion with the support 10 and the palladium membrane 30, so that the palladium membrane 30 is not easy to fall off from the support 10. In addition, since the isolation layer 20 is disposed between the palladium membrane 30 and the support 10, and the isolation layer 20 is made of a ceramic material, the phenomenon of permeation caused by thermal movement of metal molecules between the palladium membrane 30 and the support 10 can be effectively prevented, and the service life of the palladium membrane module 100 can be effectively prolonged.

When the palladium membrane module 100 of the present invention is used, the hydrogen-rich mixed gas is emitted to the palladium membrane module 100. After being filtered by the palladium membrane assembly 100, the hydrogen in the hydrogen-rich mixed gas respectively permeates through the palladium membrane 30, the isolation layer 20 and the support body 10 and enters the accommodating cavity 13, so that the hydrogen can be extracted from the hydrogen-rich mixed gas.

Compared with the prior art, the utility model discloses palladium membrane module 100 not only makes through setting up the isolation layer 20 of making with ceramic material palladium membrane 30 is difficult for droing, can not produce the infiltration phenomenon moreover, thereby has reduced palladium membrane 30's consumption rate, and then has effectively improved palladium membrane module 100's life.

Referring to fig. 2 and 3, the present invention further discloses a purifier 200, which includes a palladium membrane module 210, a mounting plate 220 for mounting the palladium membrane module 210, a fixing plate 230 for fixing the palladium membrane module 210, and a housing 240 for accommodating the palladium membrane module 210, the mounting plate 220, and the fixing plate 230.

Referring to fig. 3, the palladium membrane module 210 includes a plurality of palladium membrane elements 100. Referring to fig. 3 and 4, the mounting plate 220 is in the shape of a ring plate, and a plurality of welding holes 221 are formed thereon. One end of the connecting portion 11 facing away from the load portion 12 is welded in the welding hole 221. Referring to fig. 3 and 5, the fixing plate 230 is in the shape of a ring plate, and has fixing holes 231 for fixing the palladium membrane assembly 100 and air holes 232 for allowing air to pass through. The palladium membrane module 100 passes through the fixing hole 221 such that the fixing plate 230 is located at the boundary between the connecting portion 11 and the loading portion 12. The length ratio of the connecting part 11 to the load part 12 is between 1:5 and 1: 6. With this arrangement, it is ensured that the hydrogen-rich mixed gas is appropriately decelerated before flowing through the fixed disk 230, so that the pressure applied to the fixed disk 220 is reduced, and the flow efficiency of the hydrogen-rich mixed gas is not lowered.

Referring to fig. 3, the housing 240 includes an air inlet 241, an air outlet 242, an air outlet 243, and a filter chamber 244. The mounting plate 220 and the fixing plate 230 divide the filter chamber 244 into a first chamber 2441, a second chamber 2442 and a third chamber 2443. The inlet port 241 is in communication with the first chamber 2441, the second chamber 2442 is in communication with the outlet port 243, and the third chamber 2443 is in communication with the outlet port 242. The third chamber 2443 is not in communication with the first and second chambers 2441, 2442. The load portion 12 is located in the first chamber 2441, and the connection portion 11 is located in the second chamber 2442.

When using the purifier 200 of the present invention, the hydrogen-rich gas mixture is first flowed into the first chamber 2441 through the gas inlet 241. The hydrogen in the hydrogen-rich mixed gas enters the accommodating cavity 13 through the palladium membrane module 100, and enters the third chamber 2443 through the accommodating cavity 13, so that the purified hydrogen is output through the gas outlet 242. The exhaust gas formed by filtering the hydrogen-rich mixed gas enters the second chamber 2442 through the air holes 232 and is discharged through the exhaust port 243.

Compared with the prior art, the purifier 200 of the present invention has a longer service life due to the use of the palladium membrane module 100.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A palladium membrane module, comprising:

the supporting body is made of stainless steel materials;

the isolation layer is made of ceramic materials and is arranged on the surface of the support body; and

the palladium membrane is arranged on one side, away from the support body, of the isolation layer.

2. The palladium membrane module according to claim 1, wherein: the isolation layer is a thin film made of titanium nitride and is permeable to gas.

3. The palladium membrane module according to claim 1, wherein: the support body is tubular, and one end of the support body is sealed, so that the support body is a blind pipe; the isolation layer is attached to the outer surface of the support body.

4. The palladium membrane module according to claim 3, wherein: the support body comprises a connecting part and a load part; the load part is a powder metallurgy stainless steel pipe and can permeate gas; the isolation layer is disposed on an outer surface of the load portion.

5. The palladium membrane module according to claim 4, wherein: the connecting part is a compact stainless steel pipe made of stainless steel materials.

6. A purifier comprises a palladium membrane component, a fixed disk for fixing the palladium membrane component and a shell for accommodating the palladium membrane component and the fixed disk, and is characterized in that: the palladium membrane component comprises a support body made of stainless steel materials, an isolation layer made of ceramic materials and arranged on the surface of the support body, and a palladium membrane arranged on one side, away from the support body, of the isolation layer.

7. The purifier of claim 6, wherein: the isolation layer is a thin film made of titanium nitride and is permeable to gas.

8. The purifier of claim 6, wherein: the supporting body is tubular and comprises a connecting part and a load part; the load part is a powder metallurgy stainless steel pipe and can permeate gas; the isolation layer is disposed on an outer surface of the load portion.

9. The purifier of claim 8, wherein: the fixed disc is arranged at the junction of the connecting part and the load part, and is provided with a fixed hole for the support body to pass through and a vent hole for the gas to permeate.

10. The purifier of claim 9, wherein: the length ratio of the connecting part to the loading part is between 1:5 and 1: 6.

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