CN213171463U

CN213171463U - Purifier

Info

Publication number: CN213171463U
Application number: CN202021535088.4U
Authority: CN
Inventors: 王建明; 卢进; 孙营; 王琛
Original assignee: Suzhou Gaomai New Energy Co ltd
Current assignee: Suzhou Gaomai New Energy Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-05-11
Anticipated expiration: 2030-07-29

Abstract

The utility model provides a purifier, include: the palladium tube assembly comprises a plurality of palladium tubes arranged in an array; the mounting plate comprises a plurality of mounting holes arranged in an array, and one end of the palladium tube is fixedly mounted in the mounting holes; the shell is provided with an air inlet, an air outlet and an accommodating cavity; the mounting plate is arranged in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity communicated with the air inlet and the air outlet and a second accommodating cavity communicated with the air outlet; the shell is also provided with a CO detector for detecting the content of CO in the purified hydrogen in the second accommodating cavity. Compared with the prior art, the utility model discloses the purifier detects the content of CO in the purification hydrogen of output through the CO detector to whether the staff of being convenient for judges this purification hydrogen is qualified, effectively prevents because of the purifier output contains the hydrogen of CO and leads to hydrogen fuel cell to be poisoned.

Description

Purifier

Technical Field

The utility model belongs to the technical field of the hydrogen purification, especially, relate to a purifier.

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.

However, palladium membranes have poor mechanical properties, and when the temperature is lower than 300 ℃ and the hydrogen pressure is rapidly increased, hydrogen embrittlement is a problem. When the palladium membrane is contacted with hydrogen, the hydrogen dissolves into the palladium metal to first form alpha-palladium hydride. If the temperature is low, beta-type palladium hydride may be further formed with a rapid increase in the H/Pd ratio, resulting in expansion and lattice dislocation of palladium metal and stress, and when the stress is excessive, the film becomes brittle and breaks. The use temperature of the palladium membrane is generally 300-500 ℃, and the high temperature is beneficial to improving the hydrogen permeability, but can shorten the service life of the membrane, so that a series of problems of mutual diffusion between the palladium membrane and a metal joint, solder and the like are caused. When the palladium membrane is degraded or broken, it results in impurities such as CO (carbon monoxide) in the purified hydrogen gas. When hydrogen gas containing CO is used as a fuel for a hydrogen fuel cell, poisoning of the hydrogen fuel cell may result.

In view of the above problems, there is a need for a new purifier to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a purifier, the content of CO in this purifier passes through the purification hydrogen of CO detector detection output to whether the staff of being convenient for judges this purification hydrogen is qualified, effectively prevents because of purifier output contains the hydrogen of CO and leads to hydrogen fuel cell to be poisoned.

In order to achieve the above object, the present invention provides a purifier, comprising: the palladium tube assembly comprises a plurality of palladium tubes arranged in an array; the mounting plate comprises a plurality of mounting holes arranged in an array, and one end of the palladium tube is fixedly mounted in the mounting holes; the shell is provided with a gas inlet for inputting the hydrogen-rich mixed gas, a gas outlet for outputting the purified hydrogen, a gas outlet for discharging tail gas and an accommodating cavity; the mounting plate is arranged in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity communicated with the air inlet and the air outlet and a second accommodating cavity communicated with the air outlet; the palladium tube assembly is arranged in the first accommodating cavity; the shell is also provided with a CO detector for detecting the content of CO in the purified hydrogen in the second accommodating cavity.

As a further improvement of the present invention, the housing is further provided with a second sampling channel communicated with the second accommodating cavity, and the CO detector is mounted on the second sampling channel; a methanation catalyst is arranged in the second containing cavity, and the second sampling channel is located between the methanation catalyst and the gas outlet.

As a further improvement of the utility model, the purifier is also provided with a CO alarm device; and when the CO detector detects that the CO content in the purified hydrogen exceeds a preset threshold value, the CO alarm device gives an alarm.

As a further improvement of the utility model, the casing still is provided with first sampling passageway and installs SO on the first sampling passageway₂A detector; the first sampling channel is communicated with the first accommodating cavity SO as to facilitate the SO₂A detector detects SO in the hydrogen-rich gas mixture entering the purifier₂The content of (a).

As a further improvement of the present invention, the first sampling passage is located at a position where the housing is close to the one end of the air inlet.

As a further improvement of the present invention, the housing includes a first housing and a second housing matching with the first housing; the air inlet, the air outlet and the first accommodating cavity are arranged in the first shell, and the air outlet and the second accommodating cavity are arranged in the second shell; the first shell is provided with a first flange, and the second shell is provided with a second flange; the first flange and the second flange are fixed together through screws, so that the first shell and the second shell are integrated.

As a further improvement of the present invention, the first flange is provided with a first abutting portion, and the second flange is provided with a second abutting portion; the first abutting portion and the second abutting portion abut against the mounting plate together to seal and fix the mounting plate.

As a further improvement of the present invention, the first supporting portion and the mounting plate are connected to each other and the second supporting portion and the mounting plate are connected to each other and the graphite gasket is disposed therebetween.

As a further improvement of the utility model, the cross section of the supporting part is L-shaped.

As a further improvement of the utility model, the palladium tube comprises a support body and a palladium membrane arranged on the surface of the support body.

The utility model has the advantages that: the utility model discloses the purifier detects the content of CO in the purification hydrogen of output through the CO detector to whether the staff of being convenient for judges this purification hydrogen is qualified, effectively prevents because of purifier output contains the hydrogen of CO and leads to hydrogen fuel cell to be poisoned.

Drawings

Fig. 1 is a schematic perspective view of the purifier of the present invention.

Fig. 2 is a cross-sectional view of the purifier shown in fig. 1.

Fig. 3 is a schematic perspective view of the palladium tube assembly and the mounting plate being engaged with each other.

Fig. 4 is a schematic structural view of a palladium tube.

Fig. 5 is a schematic view of the structure of the mounting plate.

Fig. 6 is a schematic structural view of the intake plate.

Fig. 7 is a sectional view of the housing.

Fig. 8 is a partially enlarged view of fig. 7.

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 and 2, the present invention discloses a purifier 100, which includes a palladium tube assembly 10, a mounting plate 20, an air intake plate 30 and a housing 40, wherein the palladium tube assembly 10, the mounting plate 20 and the air intake plate 30 are accommodated in the housing 40.

Referring to fig. 3 and 4, the palladium tube assembly 10 includes a plurality of palladium tubes 11 arranged in an array. The palladium tube 11 includes a support 111 and a palladium membrane 112 disposed on a surface of the support 111. The support body 111 is tubular and includes an open end 1111, a sealed end 1112, and a blind recess 1113. The open end 1111 is mounted to the mounting plate 20. The support 111 is typically a tubular porous ceramic, porous stainless steel, porous glass, or the like. The palladium membrane 112 is plated on the outer surface of the support 111. The palladium membrane 112 may be a pure palladium membrane or an alloy palladium membrane. When the hydrogen-rich mixed gas is used, the hydrogen-rich mixed gas is jetted to the palladium tube 11, and after being filtered by the palladium membrane 112, the hydrogen enters the blind groove 1113 and is output and purified through the open end 1111.

Referring to fig. 5, 3 and 2, the mounting plate 20 is in a shape of a circular plate and includes a plurality of mounting holes 21 arranged in an array. The open end 1111 of the palladium tube 11 is fixedly installed in the installation hole 21. In this embodiment, the open end 1111 of the palladium pipe 11 is fixedly installed in the installation hole 21 by welding, but in other embodiments, the open end 1111 of the palladium pipe 11 may also be fixedly installed by other methods, which is not limited by the present invention. In the present embodiment, the mounting plate 20 is a stainless steel plate, but in other embodiments, the mounting plate 20 may be made of other materials, which is not limited by the present invention.

Referring to fig. 6 and 2, the air inlet plate 30 is a circular plate and includes a plurality of air inlet holes 31 arranged in an array. The air inlet 31 has N (N is an integer, and N >2) air inlets adjacent thereto, and the adjacent N air inlets constitute a regular polygon. In this embodiment, N is 6, and 6 air inlet holes form a regular hexagon, as shown by the dotted line a in fig. 6. Because the plurality of air inlet holes 31 are uniformly distributed on the air inlet disc 30, the hydrogen-rich mixed gas injected into the purifier 100 forms a stable laminar flow under the action of the air inlet holes 31, so that the hydrogen-rich mixed gas is fully contacted with the palladium tube assembly 10, and the purification efficiency of the purifier 100 is improved.

Referring to fig. 7, fig. 2 and fig. 1, a receiving cavity 401 is disposed in the housing 40 to receive the palladium tube assembly 10, the mounting plate 20 and the air intake plate 30. The periphery of the gas inlet disc 30 tightly abuts against the cavity wall of the accommodating cavity 401 to prevent the hydrogen-rich mixed gas from flowing into the gap between the gas inlet disc 30 and the cavity wall of the accommodating cavity 401, so as to disturb the laminar flow and further influence the hydrogen-rich mixed gas to fully contact the palladium tube assembly 10. The housing 40 includes a first housing 41 and a second housing 42 coupled to the first housing 41. The first housing 41 is provided with a first receiving chamber 411, a first flange 412, an inlet 413 for introducing a hydrogen-rich gas mixture, an outlet 414 for discharging off-gas, a first sampling passage 415 communicated with the first receiving chamber 411, and an SO2 detector 416 mounted on the first sampling passage 415. The tail gas refers to the non-hydrogen-rich gas remaining after the hydrogen-rich mixed gas is filtered by the palladium tube assembly 10. The second housing 42 is provided with a second receiving chamber 421, a second flange 422, a gas outlet 423 for outputting purified hydrogen gas, a second sampling passage 424 communicated with the second receiving chamber 421, and a CO detector 425 installed on the second sampling passage 424. The first accommodating cavity 411 and the second accommodating cavity 421 together form the accommodating cavity 401, and the palladium tube assembly 10 and the air inlet disc 30 are accommodated in the first accommodating cavity 411. The first and

second flanges

412 and 422 are fixed together by screws, so that the first and

second housings

41 and 42 are formed integrally. Because the first shell 41 and the second shell 42 are fixedly connected by flanges, the palladium tube assembly 10 is conveniently and fixedly installed in the shell 40, and meanwhile, the later-stage disassembly maintenance or disassembly and recovery are also convenient. Referring to fig. 8, the first flange 412 is provided with a first abutting portion 4121, the second flange 422 is provided with a second abutting portion 4221, and the first abutting portion 4121 and the second abutting portion 4221 jointly abut against the mounting plate 20 to seal and fix the mounting plate 20. In this embodiment, the cross sections of the first abutting portion 4121 and the second abutting portion 4221 are L-shaped. Graphite gaskets (not shown) are respectively arranged between the first abutting portion 4121 and the mounting plate 20 and between the second abutting portion 4221 and the mounting plate 20 to enhance the sealing effect. The inlet port 413 is located at an end of the first housing 41 facing away from the mounting plate 20, the inlet disc 30 is located between the palladium tube assembly 10 and the inlet port 413, and the outlet port 414 is located between the mounting plate 20 and the sealed end 1112. Preferably, the exhaust port 414 abuts the mounting plate 20. The air outlet 423 is located at an end of the second housing 42 facing away from the mounting plate 20. The first sampling passage 415 is in a hollow cylindrical shape, is located at one end of the housing 40 close to the air inlet 413, and is communicated with the first accommodating cavity 411 so as to lead out the hydrogen-rich mixed gas located in the first accommodating cavity 411. The SO2 detector 416 detects the content of SO2 in the hydrogen-rich mixed gas drawn from the first sampling channel 415. Preferably, the purifier 100 may also be provided with a controller and an SO2 alarm device. When the content of SO2 exceeds a preset threshold, the controller controls an SO2 alarm device to give an alarm to prevent poisoning of the palladium membrane 112. The SO2 alarm device can be a warning lamp, an alarm horn and the like. The second sampling channel 424 is hollow and cylindrical, and is communicated with the second containing cavity 421, so as to lead out the purified hydrogen in the second containing cavity 421. The CO detector 425 detects the CO content in the purified hydrogen gas exiting the second sampling channel 424. Preferably, the purifier 100 may also be provided with a CO alarm device. And when the content of the CO exceeds a preset threshold value, the controller controls the CO alarm device to give an alarm. The CO alarm device can be a warning lamp, an alarm horn and the like. Preferably, a methanation catalyst is further disposed in the second receiving cavity 421, and the second sampling channel 424 is located between the methanation catalyst and the gas outlet 423. By such an arrangement, CO in the purified hydrogen can be removed.

When the purifier 100 of the present invention is used, firstly, the hydrogen-rich mixed gas is injected into the purifier 100 through the gas inlet 413, and at this time, the SO2 detector 416 detects whether the SO2 content in the hydrogen-rich mixed gas exceeds a preset threshold. When the content of the SO2 exceeds a preset value, the SO2 alarm device gives an alarm. When the SO2 content is less than the preset threshold, the hydrogen-rich mixed gas forms a smooth laminar flow under the action of the air intake disc 30, thereby facilitating sufficient contact between the hydrogen-rich mixed gas and the palladium tube assembly 10. Then, after the hydrogen-rich mixed gas is filtered by the palladium tube assembly 10, the hydrogen gas enters the blind groove 1113 through the palladium membrane 112, and enters the second receiving chamber 421 through the open end 1111, and further the purified hydrogen gas is output through the gas outlet 423, at this time, the CO detector 425 detects whether CO in the output purified hydrogen gas exceeds a threshold value. And when the CO content exceeds a preset value, the CO alarm device gives an alarm. The tail gas formed after the hydrogen-rich mixed gas is filtered by the palladium tube assembly 10 is discharged out through the exhaust port 414.

Compared with the prior art, the utility model discloses purifier 100 detects the content of CO in the purification hydrogen of output through CO detector 425 to whether the staff of being convenient for judges this purification hydrogen is qualified, effectively prevents because purifier 100 outputs the hydrogen that contains CO and leads to hydrogen fuel cell to be poisoned.

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

1. A purifier, comprising:

the palladium tube assembly comprises a plurality of palladium tubes arranged in an array;

the mounting plate comprises a plurality of mounting holes arranged in an array, and one end of the palladium tube is fixedly mounted in the mounting holes; and

the hydrogen purification device comprises a shell, a hydrogen purification device and a hydrogen purification device, wherein the shell is provided with a gas inlet for inputting hydrogen-rich mixed gas, a gas outlet for outputting purified hydrogen, a gas outlet for discharging tail gas and an accommodating cavity; the mounting plate is arranged in the accommodating cavity and divides the accommodating cavity into a first accommodating cavity communicated with the air inlet and the air outlet and a second accommodating cavity communicated with the air outlet; the palladium tube assembly is arranged in the first accommodating cavity; the method is characterized in that:

the shell is also provided with a CO detector for detecting the content of CO in the purified hydrogen in the second accommodating cavity.

2. The purifier of claim 1, wherein: the shell is also provided with a second sampling channel communicated with the second accommodating cavity, and the CO detector is arranged on the second sampling channel; a methanation catalyst is arranged in the second containing cavity, and the second sampling channel is located between the methanation catalyst and the gas outlet.

3. The purifier of claim 1, wherein: the purifier is also provided with a CO alarm device; and when the CO detector detects that the CO content in the purified hydrogen exceeds a preset threshold value, the CO alarm device gives an alarm.

4. The purifier of claim 1, wherein: the shell is also provided with a first sampling channel and an SO (SO) arranged on the first sampling channel₂A detector; the first sampling channel is communicated with the first accommodating cavity SO as to facilitate the SO₂A detector detects SO in the hydrogen-rich gas mixture entering the purifier₂The content of (a).

5. The purifier of claim 4, wherein: the first sampling channel is located at one end of the housing near the air inlet.

6. The purifier of claim 1, wherein: the shell comprises a first shell and a second shell matched with the first shell; the air inlet, the air outlet and the first accommodating cavity are arranged in the first shell, and the air outlet and the second accommodating cavity are arranged in the second shell; the first shell is provided with a first flange, and the second shell is provided with a second flange; the first flange and the second flange are fixed together through screws, so that the first shell and the second shell are integrated.

7. The purifier of claim 6, wherein: the first flange is provided with a first abutting part, and the second flange is provided with a second abutting part; the first abutting portion and the second abutting portion abut against the mounting plate together to seal and fix the mounting plate.

8. The purifier of claim 7, wherein: graphite gaskets are respectively arranged between the first abutting part and the mounting plate and between the second abutting part and the mounting plate.

9. The purifier of claim 7, wherein: the cross section of the abutting part is L-shaped.

10. The purifier of claim 1, wherein: the palladium tube comprises a support body and a palladium membrane arranged on the surface of the support body.