A purifier and gas preparation device

Abstract

The application provides a purifier and a gas preparation device. The purifier comprises a plurality of stacked fixed purification units. The purification unit comprises: a filter plate assembly for filtering hydrogen-rich gas to form hydrogen gas and waste gas; a hydrogen flow channel plate which is pressed on one side of the filter plate assembly and is used for receiving and guiding the hydrogen gas; and a waste gas plate assembly which is pressed on the other side of the filter plate assembly and is used for receiving the hydrogen-rich gas and guiding the obtained waste gas. The filter plate assembly, the hydrogen flow channel plate and the waste gas plate assembly have the same shape and are each provided with a plurality of positionally corresponding annular parts at the outer edge and in the direction perpendicular to the purification unit. The positionally corresponding annular parts form gas channels which pass through the purification unit. Different gas channels are used for forming a hydrogen-rich gas passage, a hydrogen passage and a waste gas passage. The hydrogen flow channel plate is communicated with the hydrogen passage to guide the hydrogen gas into the hydrogen passage. The waste gas plate assembly is communicated with the hydrogen-rich gas passage and the waste gas passage to receive the hydrogen-rich gas and guide the waste gas into the waste gas passage.

Description

Technical Field

[0001] The present invention relates to the field of gas purification technology, and in particular to a purifier and a gas preparation device. Background Technology

[0002] Purification refers to the process of separating impurities from a mixture to increase its purity. As an important chemical method, purification plays a crucial role not only in chemical research but also in chemical production. Many important chemical research and production processes rely heavily on purification. Currently, purifiers are used for gas purification, but existing purifier structures have limitations. All gas delivery channels are located inside the purifier, occupying the purification and filtration area, resulting in low purification efficiency, low membrane utilization, and high cost. This invention discloses a method and purification device that achieves 100% membrane utilization and solves the problem of high pressure loss in the main fluid inlet and outlet channels of the purifier, making the manufacture of large-scale purifiers a reality. Summary of the Invention

[0003] The present invention provides a purifier that can achieve compatibility in terms of purification accuracy, purification efficiency and purifier volume, as well as a gas preparation device having the purifier.

[0004] To address the aforementioned technical problems, embodiments of the present invention provide a purifier, comprising multiple stacked and fixedly connected purification units, wherein the purification unit includes:

[0005] Filter plate assembly, used to filter hydrogen-rich gas, forming hydrogen and exhaust gas;

[0006] A hydrogen flow channel plate, which covers one side of the filter plate assembly, is used to receive and guide the hydrogen gas.

[0007] The exhaust gas plate assembly covers the other side of the filter plate assembly and is used to receive the hydrogen-rich gas, so that the hydrogen-rich gas is in full contact with the filter plate assembly, while guiding the exhaust gas.

[0008] The filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly are identical in shape and each has multiple annular portions formed at points on its outer edge in a direction perpendicular to the purification unit. These annular portions form gas channels that penetrate the purification unit. The different gas channels are used to form hydrogen-rich gas channels, hydrogen gas channels, and exhaust gas channels, respectively. The hydrogen flow channel plate is connected to the hydrogen gas channels to guide the hydrogen gas into them. The exhaust gas plate assembly is connected to both the hydrogen-rich gas channels and the exhaust gas channels to receive the hydrogen-rich gas and guide the exhaust gas into them.

[0009] As an optional embodiment, the edge of the hydrogen flow channel plate is provided with a hydrogen tank for containing leaked hydrogen and a first vent connected to the hydrogen tank for discharging the leaked hydrogen. At least a portion of the exhaust plate assembly has an exhaust vent for containing leaked exhaust gas at its edge. The exhaust plate assembly, the hydrogen flow channel plate, and the filter plate assembly are all provided with corresponding second vents. The exhaust vent is connected to the second vents to discharge the leaked exhaust gas through a plurality of second vents.

[0010] As an optional embodiment, the filter plate assembly includes at least one mesh plate, a hydrogen permeation membrane connected to the mesh plate, and a membrane support frame for the hydrogen permeation membrane. The mesh plate, the hydrogen permeation membrane, and the membrane support frame are all the same shape as the filter plate assembly, the hydrogen flow channel plate, and the exhaust gas plate assembly, and are fixedly connected to each other.

[0011] The edges of the mesh plate, the hydrogen permeation membrane, and the membrane support frame are provided with an annular portion that communicates with each gas channel. The mesh plate includes one or two pieces. When there is one piece, the mesh plate is connected to one side of the membrane support frame. When there are two pieces, the hydrogen permeation membrane and the membrane support frame of the hydrogen permeation membrane are sandwiched between the two mesh plates.

[0012] As an optional embodiment, the hydrogen flow channel plate is recessed on the side facing the filter plate assembly to form multiple hydrogen flow channels. The edge of the hydrogen flow channel plate is provided with an elongated hydrogen groove, a first gas hole communicating with the hydrogen groove, and a hydrogen gas hole communicating with the hydrogen channel and the hydrogen flow channel.

[0013] The exhaust gas plate assembly includes an exhaust gas duct plate that covers the other side of the filter plate assembly and an exhaust gas end plate that covers the exhaust gas duct plate. The exhaust gas duct plate is recessed on the side facing the filter plate assembly to form multiple gas channels, and the exhaust gas groove is opened at the edge of the exhaust gas duct plate.

[0014] The exhaust gas end plate has a hydrogen-rich gas hole and a first guide groove connected to the hydrogen-rich gas channel at one edge facing the exhaust gas channel, as well as an exhaust gas hole and a second guide groove connected to the exhaust gas channel.

[0015] The waste gas flow channel plate has an air inlet corresponding to the first guide groove, which is connected to the first guide groove and the gas flow channel, for introducing the hydrogen-rich gas from the hydrogen-rich gas channel into the gas flow channel. At the same time, the waste gas flow channel plate has an air outlet corresponding to the second guide groove, which is connected to the second guide groove and the gas flow channel, for introducing the waste gas into the waste gas channel.

[0016] As an optional embodiment, the purification unit further includes a flue gas plate assembly with the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly. The flue gas plate assembly covers the side of the hydrogen flow channel plate away from the filter plate assembly and is used to introduce and export high-temperature flue gas for preheating the purification unit. The edge of the flue gas plate assembly is provided with an annular portion communicating with the air passage at each of the air passages, and the first air hole and the second air hole are also provided at each of the first air holes and the second air holes.

[0017] The flue gas plate assembly includes a hydrogen-flue gas end plate that covers the hydrogen flow channel plate and a flue gas end plate that covers the hydrogen-flue gas end plate. The hydrogen-flue gas end plate is recessed on one side facing the flue gas end plate to form multiple flue gas channels. The hydrogen-flue gas end plate and the flue gas end plate have grooves that are respectively connected to the outside and the flue gas channels on the side along the direction perpendicular to the purification unit. The grooves at the corresponding positions cooperate to form flue gas holes.

[0018] As an optional embodiment, an intermediate end plate is used to connect two adjacent purification units. The intermediate end plate has the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly. At its edge, there is an annular part that communicates with each of the gas channels, an air port that communicates with each of the gas channels for conveying different gases, and a first air hole and a second air hole that correspond to each of the first and second air holes. At the same time, hydrogen tanks and exhaust gas tanks are respectively provided on both sides of the intermediate end plate.

[0019] As an optional embodiment, each of the annular portions is provided with a slot near the edge of the corresponding plate. The slots of the annular portions located in the same gas channel are interconnected to form a long plate-shaped slot. The hydrogen gas vent, the hydrogen-rich gas vent, and the exhaust gas vent are all connected to the long plate-shaped slot. A gas filter is inserted into the long plate-shaped slot.

[0020] As an optional embodiment, multiple purification units cooperate to form a purification unit. The purifier includes multiple purification units. The multiple purification units, purification units, and each plate are connected by welding with a metal plating layer. Adjacent purification units are connected by graphite paper. The graphite paper has the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly, and its edge is provided with an annular part communicating with each of the gas channels.

[0021] As an optional embodiment, the purifier further includes a top plate and a bottom plate for clamping multiple purification units. The top plate and bottom plate have the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly, and each of the gas channels is provided with a screw hole for inserting a bolt. The bolt's shank diameter is smaller than the inner diameter of the corresponding gas channel so that gas can flow through the gap between the gas channel and the bolt. Both ends of the bolt extend out of the top plate and bottom plate and are sealed to the corresponding top plate or bottom plate based on a nut and a sealing gasket.

[0022] The top plate and bottom plate are provided with gas pipes that are respectively connected to the first air hole and the second air hole for transporting gas. The top plate has multiple channels with one end connected to the corresponding air duct and the other end extending to the outside of the top plate. The multiple channels are respectively used to transport hydrogen-rich gas, hydrogen gas and waste gas.

[0023] Another embodiment of the present invention also provides a gas preparation apparatus, including the purifier described above.

[0024] Based on the disclosure of the above embodiments, it can be understood that the beneficial effects of the embodiments of the present invention include a simple overall structure of the purifier, ease of fabrication, and the formation of multiple annular portions at the edges of each plate in the purification unit. This allows the stacked plates to form interconnected gas channels for conveying hydrogen-rich gas, hydrogen gas, and waste gas, respectively. Since these annular portions are located at the edges of the plates, their size is not limited and can be configured as needed. Therefore, this gas channel increases the gas flow rate and maximizes the filtration area of ​​the filter plate assembly, significantly improving the purification efficiency regardless of the purifier's volume. Furthermore, a hydrogen tank is provided on the hydrogen flow channel plate, and a waste gas tank is provided on the waste gas flow channel plate. Each plate also has a first gas hole communicating with the hydrogen tank and a second gas hole communicating with the waste gas tank. This allows any gas leakage within the flow channels, such as hydrogen or waste gas leakage, to be discharged through the corresponding gas tank and gas hole without affecting the purity of the gas within the flow channels. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the purifier in an embodiment of the present invention.

[0026] Figure 2 This is an exploded structural diagram of the purifier in an embodiment of the present invention.

[0027] Figure 3 This is another schematic diagram of the purifier in an embodiment of the present invention.

[0028] Figure 4 This is a partial structural schematic diagram of the purifier in the embodiments of the present invention.

[0029] Figure 5 This is a schematic diagram of the purification unit in an embodiment of the present invention.

[0030] Figure 6 This is an exploded view of the purification unit in an embodiment of the present invention.

[0031] Figure 7 for Figure 6 Another structural diagram from another angle.

[0032] Figure 8 This is another exploded view of the purification unit in an embodiment of the present invention.

[0033] Figure 9 This is a schematic diagram of the purification unit in another embodiment of the present invention.

[0034] Figure 10 This is a schematic diagram of the purifier in another embodiment of the present invention.

[0035] Figure 11 This is an exploded structural diagram of the purifier in another embodiment of the present invention.

[0036] Figure 12 This is a schematic diagram of the structure of the intermediate end plate in an embodiment of the present invention.

[0037] Figure 13 This is a schematic diagram of the purification unit in another embodiment of the present invention.

[0038] Figure 14 This is a schematic diagram of the structure of the intermediate end plate in another embodiment of the present invention.

[0039] Figure 15 This is a schematic diagram of the purifier in another embodiment of the present invention.

[0040] Figure label:

[0041] 1-Purification unit; 2-Annular section; 3-Hydrogen-rich channel; 4-Hydrogen channel; 5-Exhaust gas channel; 6-Mesh plate; 7-Hydrogen permeation membrane; 8-Membrane support frame; 9-Hydrogen flow channel plate; 10-Flue gas flow channel; 11-Hydrogen vent; 12-Exhaust gas flow channel plate; 13-Exhaust gas end plate; 14-Gas flow channel; 15-First guide groove; 16-Inlet; 17-Second guide groove; 18-Outlet; 19- 20 - Hydrogen-flue gas end plate; 21 - Flue gas port; 22 - Intermediate end plate; 23 - Gas port; 24 - Slot; 25 - Graphite paper; 26 - Top plate; 27 - Bottom plate; 28 - Bolt; 29 - Nut; 30 - Sealing gasket; 31 - Individual unit; 32 - Flue gas end plate; 33 - Third guide channel; 34 - Hydrogen tank; 35 - First gas port; 36 - Waste gas tank; 37 - Second gas port; 38 - Gas pipeline Detailed Implementation

[0042] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the invention.

[0043] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0044] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0045] These and other features of the invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0046] It should also be understood that although the invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0047] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0048] Specific embodiments of the present disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure and can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present disclosure. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of substantially any suitable detailed structures.

[0049] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0050] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0051] like Figures 1 to 8 As shown, an embodiment of the present invention provides a purifier, including a plurality of stacked and fixedly connected purification units 1, wherein the purification unit 1 includes:

[0052] Filter plate assembly, used to filter hydrogen-rich gas, forming hydrogen and exhaust gas;

[0053] Hydrogen flow channel plate 9, which is pressed onto one side of the filter plate assembly, is used to receive and guide hydrogen gas;

[0054] The exhaust plate assembly is overlaid on the other side of the filter plate assembly to receive hydrogen-rich gas, ensuring that the hydrogen-rich gas is in full contact with the filter plate assembly, while simultaneously guiding the exhaust gas.

[0055] The filter plate assembly, hydrogen flow channel plate 9, and exhaust gas plate assembly have the same shape and each has annular portions 2 formed at multiple locations on its outer edge in the direction perpendicular to the purification unit 1. The annular portions 2 form gas channels that penetrate the purification unit 1. The different gas channels are used to form hydrogen-rich gas channels 3, hydrogen gas channels 4, and exhaust gas channels 5, respectively. The hydrogen flow channel plate 9 is connected to the hydrogen gas channel 4 to guide hydrogen gas into the hydrogen gas channel 4. The exhaust gas plate assembly is connected to the hydrogen-rich gas channel 3 and the exhaust gas channel 5 to receive hydrogen-rich gas and guide exhaust gas into the exhaust gas channel 5.

[0056] For example, the purifier may include one or more purification units 1, the specific number of which can be increased or decreased according to actual needs. Each purification unit 1 is identical, including a filter plate assembly, a hydrogen flow channel plate 9, and an exhaust gas plate assembly with the same shape and size. For example, they are all rectangular, circular, or even irregularly shaped, etc., with no specific limitations. By restricting the shape and size of each plate to the same form, the process difficulty can be greatly reduced, and a better sealing connection can be achieved. The following will use rectangular and circular examples respectively for explanation. In order to increase the gas flow rate while reducing the occupation of the area inside the purification unit 1 used for gas purification and filtration, and to maximize the purification and filtration area, in this embodiment, annular portions 2 are respectively provided at multiple locations on the edges of the filter plate assembly, the hydrogen flow channel plate 9, and the exhaust gas plate assembly. The structure of the annular portions 2 is not unique; they can be rectangular, circular, or irregularly shaped, etc., as long as they are annular. Furthermore, the multiple annular portions 2 are divided into multiple groups in the direction perpendicular to the purification unit 1. Each group of annular portions 2 is corresponding in position and interconnected to form a gas channel that runs through the purification unit 1. These multiple gas channels are used to form hydrogen channel 4, hydrogen-rich gas channel 3, and exhaust gas channel 5, respectively, for transporting hydrogen, hydrogen-rich gas, and exhaust gas. The location of the annular portion 2 is not fixed. For example, if each plate is rectangular, the multiple annular portions 2 can be distributed at the four apex corners of the plate, or at the positions near the apex corners on each side, as shown in the figure, or even at the center of the side plate, etc. If each plate is circular, the multiple annular portions 2 can be evenly distributed on the edge of the circular plate, such as a central angle of 90° between two adjacent annular portions 2, or 60°, 45°, etc., which is not limited and can be determined according to the actual number of gas channels required. Furthermore, the number of hydrogen channel 4, hydrogen-rich gas channel 3, and exhaust gas channel 5 in the multiple gas channels is also not fixed. For example, there can be one for each channel, or there can be two or more hydrogen channels 4, two or more hydrogen-rich channels 3, etc., and the exhaust gas channel 5 can be arranged similarly, depending on the actual gas flow rate of each gas. In this embodiment, the hydrogen flow channel plate 9 is connected to the hydrogen channel 4 to guide hydrogen into the hydrogen channel 4, and the exhaust gas plate assembly is connected to the hydrogen-rich channel 3 and the exhaust gas channel 5 to receive hydrogen-rich gas and guide exhaust gas into the exhaust gas channel 5.

[0057] Based on the disclosure of the above embodiments, it can be understood that the beneficial effects of this embodiment include a simple overall structure of the purifier, ease of fabrication, and the formation of multiple annular portions 2 at the edges of each plate in the purification unit 1. This allows the annular portions 2 at each position to form a through-flow gas channel when the plates in the purification unit 1 are stacked, for conveying hydrogen-rich gas, hydrogen gas, and waste gas respectively. Since the annular portions 2 are located at the edges of the plates, their size is not limited and can be configured as needed. Therefore, this gas channel can increase the gas flow rate and maximize the filtration area of ​​the filter plate assembly, thereby significantly improving the purification efficiency of the purifier regardless of its volume.

[0058] Continue as Figures 1 to 8 As shown, when the shapes of each plate and the annular portion 2 in the purification unit 1 are rectangular, and the annular portion 2 is respectively located at the top corner of each plate, it is necessary to "cut off" the top corner of each plate and one top corner of the annular portion 2, thus forming a shape as shown. Figure 4 or Figure 5 or Figure 6 As shown in the figure, after cutting off parts of the top corners of the plate and connecting them to the corresponding ring part 2, the plate in this embodiment can be formed. Figures 4 to 6 The structure is shown in the diagram. However, if the annular portion 2 is located on the side of the plate and near, or even flush with, the annular portion 2 and the top corner of the plate can be retained without cutting. For a specific structure, please refer to [reference needed]. Figure 11 As shown.

[0059] Furthermore, such as Figure 9 and Figure 10 As shown, when the plate is circular, its annular part 2 can be a plate-shaped extension that extends outward parallel to a portion of the plate edge. Then, through holes are opened on each extension. The specific structure can be referred to the figure. The purification and filtration area is formed in the middle of each circular plate.

[0060] continue Figures 5 to 8As shown, the filter plate assembly in this embodiment preferably includes two mesh plates 6, a hydrogen permeation membrane 7 sandwiched between the two mesh plates 6, and a membrane support frame 8 for the hydrogen permeation membrane 7. The mesh plates 6, the hydrogen permeation membrane 7, and the membrane support frame 8 are all the same shape and size as the filter plate assembly, the hydrogen flow channel plate 9, and the exhaust gas plate assembly, and are fixedly connected to each other. Alternatively, it may only include one mesh plate 6, which is connected to one side of the membrane support frame 8. In this embodiment, the edges of the mesh plates 6, the hydrogen permeation membrane 7, and the membrane support frame 8 are provided with an annular portion 2 that communicates with each gas channel. Specifically, the hydrogen permeation membrane 7 in this embodiment can be a palladium membrane. Of course, the material is not unique, and other materials can be selected to prepare the permeation membrane according to the actual situation. The annular portion 2, which is made of other materials, is provided at the edge of the membrane. By setting the annular portion 2 at the edge, the actual usable area of ​​the hydrogen permeation membrane 7 can be maximized, and the utilization rate of the membrane can be almost maximized. Moreover, the size of the annular portion 2 itself will not have any impact on the membrane, making it more widely applicable and more usable. In practical applications, the two mesh plates 6, the hydrogen permeation membrane 7, and the membrane support frame 8 can be welded together. For example, diffusion welding can be performed between the plates first, and then the peripheries of each plate can be welded together to fill the gaps. The membrane support frame 8 is provided to support the hydrogen permeation membrane 7, preventing it from shrinking or shifting due to high temperatures. The support frame also acts as a buffer and prevents the membrane from sticking to the mesh plates 6 due to heat, thus affecting the hydrogen filtration effect. Furthermore, in this embodiment, by welding the plates together, a stable connection between the plates and the membrane is achieved, providing a seal and preventing gas leakage. The welding of the structures described above is all based on metal plating.

[0061] Furthermore, such as Figures 5 to 8 As shown, in this embodiment, the hydrogen flow channel plate 9 is recessed on the side facing the filter plate assembly to form multiple hydrogen flow channels. The specific shape of these hydrogen flow channels is not limited. If the hydrogen flow rate is large, more tortuous channels can be set to increase the gas storage capacity. If the hydrogen flow rate is small, fewer channels can be set, and the tortuosity can also be reduced. The specific shape is not fixed. Hydrogen vents 11 are also provided at the edge of the hydrogen flow channel plate 9, communicating with the hydrogen channels 4 and the flow channels. For example, the hydrogen vents 11 are located at the edge of the plate body connected to the annular portion 2. Each hydrogen vent 11 corresponds at least one-to-one with a hydrogen channel 4, or multiple hydrogen vents 11 may correspond to one hydrogen channel 4. After the filter plate assembly filters out the hydrogen, it flows through the hydrogen channels in the hydrogen flow channel plate 9 to each hydrogen vent 11, and then through the hydrogen vents 11 to the hydrogen channel 4. As shown in the figure, the hydrogen channel 4 in this embodiment includes two channels. When the plate is rectangular, the two hydrogen channels 4 are located at the two ends of the diagonal of the plate. Of course, this arrangement is not unique and is only an example.

[0062] Continue to combine Figures 5 to 8As shown, the exhaust gas plate assembly in this embodiment includes an exhaust gas duct plate 12 that covers the other side of the filter plate assembly and an exhaust gas end plate 13 that covers the other side of the exhaust gas duct plate 12. The exhaust gas duct plate 12 is recessed on the side facing the filter plate assembly to form multiple gas channels 14. The design concept of the gas channels 14 is the same as that of the hydrogen gas channels described above. The exhaust gas end plate 13 has a hydrogen-rich gas hole 11 and a first guide groove 15 connected to the hydrogen-rich gas channel 3 at one edge facing the exhaust gas channel plate 12. At the same time, the exhaust gas end plate 13 also has an exhaust gas hole and a second guide groove 17 connected to the exhaust gas channel 5 at the same edge. The exhaust gas channel plate 12 has an inlet hole 16 connected to the first guide groove 15 and the gas channel 14 at the corresponding position of the first guide groove 15. At the same time, an outlet hole 18 connected to the second guide groove 17 and the gas channel 14 is opened at the corresponding position of the second guide groove 17, so as to introduce hydrogen-rich gas from the hydrogen-rich gas channel 3 into the gas channel 14 and simultaneously introduce exhaust gas into the exhaust gas channel 5. That is, the hydrogen-rich gas flows from the hydrogen-rich gas channel 3 through the hydrogen-rich gas hole 11 and the first guide groove 15 of the exhaust gas end plate 13, and then flows into the gas flow channel 14 through the air inlet 16 on the exhaust gas flow channel plate 12, and makes full contact with the filter plate assembly. Then the purified and filtered hydrogen moves towards the hydrogen flow channel plate 9, while the remaining exhaust gas flows along the gas flow channel 14 to the air outlet 18 and the second guide groove 17 of the exhaust gas end plate 13, and then enters the exhaust gas channel 5 for discharge.

[0063] Optionally, continue to combine Figures 5 to 8As shown, the purification unit 1 in this embodiment also includes a flue gas plate assembly with the same shape as the filter plate assembly, the hydrogen flow channel plate 9, and the exhaust gas plate assembly. This flue gas plate assembly covers the side of the hydrogen flow channel plate 9 opposite to the filter plate assembly, and is used to introduce and exhaust high-temperature flue gas for preheating the purification unit 1. Each plate in the flue gas plate assembly has an annular portion 2 corresponding to each gas channel at its edge, communicating with that gas channel. Specifically, the flue gas plate assembly in this embodiment includes a hydrogen-flue gas end plate 19 covering the hydrogen flow channel plate 9, and a flue gas end plate 32 covering the other side of the hydrogen-flue gas end plate 19. The hydrogen-to-flue gas end plate 19 is recessed on the side facing the flue gas end plate 32 to form multiple flue gas channels 10. The design concept of the flue gas channels 10 is similar to that of the hydrogen channels and gas channels 14, except that there is no need to set a large degree of tortuosity or detour. This is because the flue gas channels 10 in this embodiment are only intended to increase the residence time of the flue gas and to ensure that the purification unit 1 is heated evenly. Therefore, as long as this effect is met, any channel design is acceptable. The hydrogen-to-flue gas end plate 19 and the flue gas end plate 32 have corresponding grooves on their sides along the direction perpendicular to the purification unit 1, which are respectively connected to the outside and the flue gas channels 10. The grooves at the corresponding positions form flue gas holes 20. The flue gas holes 20 can be arranged at the positions corresponding to the positions of the flue gas plate assembly. For example, if the plate is rectangular, they can be arranged on the two opposite sides. In application, taking a rectangular plate as an example, the flue gas enters the flue gas flow channel 10 through the flue gas hole 20 on one side of the flue gas plate assembly, and then exits through the flue gas hole 20 on the opposite side of the flue gas plate assembly, thereby completing heat exchange and transferring heat energy to other plates in the purification unit 1, increasing thermal efficiency, reducing thermal stress, and preventing cracks from appearing in each plate due to sudden temperature changes.

[0064] Of course, the flue gas panel assembly can also be omitted, such as... Figure 9 and Figure 10 The purifier shown in the example has a circular plate and does not include a flue gas plate assembly. However, this does not mean that a purifier with a circular plate cannot have a flue gas plate assembly; it can. The circular plate purifier in this embodiment is only described as an example.

[0065] Optionally, on the side of the hydrogen-flue gas end plate 19 facing the hydrogen flow channel plate 9, a third guide groove 33 can be provided at the corresponding hydrogen gas hole 11, connecting the hole and the hydrogen channel 4, so that hydrogen can flow from the hydrogen gas hole 11 to the third guide groove 33, and then flow into the hydrogen channel 4 through the third guide groove 33. Alternatively, the third guide groove 33 can be omitted, and the hydrogen gas hole 11 can be directly connected to the hydrogen channel 4, allowing hydrogen to directly enter the hydrogen channel 4 from the hydrogen gas hole 11.

[0066] like Figure 13As shown, in another embodiment, gas leakage can easily occur due to poor sealing during the connection and fixing of the various plates. For example, gas in the flow channel may leak into the gas channel, affecting the gas purity, or it may leak directly to the outside, causing a waste of gas source. To avoid the above phenomena, the purifier unit in this embodiment is also provided with a leak-proof module to prevent gas leakage. Specifically, in order to implement the leak-proof module, this embodiment provides a hydrogen tank 34 for accommodating leaked hydrogen at least at the edge of the hydrogen flow channel plate 9, and a first gas hole 35 communicating with the hydrogen tank 34 is provided. The hydrogen tank 34 can be elongated or other shapes, and the first gas hole 35 can be opened at one end of the hydrogen tank 34. Each plate in the filter plate assembly may also have a hydrogen channel 34 at its edge, and each plate in both the filter plate assembly and the flue gas plate assembly is provided with a first vent 35. These multiple first vents 35 are positioned correspondingly to form a channel for conveying leaked hydrogen after all plates are connected and pressed together. Furthermore, multiple first vents 35 can be provided at different locations to form multiple channels after all plates are connected and pressed together. Similarly, to prevent exhaust gas leakage, at least the exhaust gas channel plate in the exhaust gas plate assembly is provided with an exhaust gas channel 36. Its structure can be the same as or different from the hydrogen channel 34, but the placement must be different. Of course, other plates in the exhaust gas plate assembly and the filter plate assembly can also be provided with this exhaust gas channel 36; the specific arrangement is not unique. Furthermore, each plate in the exhaust plate assembly, filter plate assembly, and flue gas plate assembly is provided with a second air hole 37. After the plates are connected and pressed together, the second air hole 37 can cooperate to form a channel for conveying leaked exhaust gas. This channel is connected to the exhaust gas trough 36. Moreover, the number of this channel is not unique, that is, the number of second air holes 37 opened on each plate is not unique and can be determined according to the actual connection of the plates.

[0067] Combination Figures 1 to 4 As shown, a purifier typically includes multiple purification units 1. To accommodate these multiple purification units 1 and prevent obstructed gas flow, this embodiment includes an intermediate end plate 21 for receiving the gas between adjacent purification units 1. Figure 12 As shown, the intermediate end plate 21 has the same shape as the filter plate assembly, hydrogen flow channel plate 9, and exhaust gas plate assembly. Each edge of the intermediate end plate 21 has an annular portion 2 corresponding to a gas channel, communicating with that channel. Furthermore, the intermediate end plate 21 has air holes 22 near each annular portion 2, each air hole 22 communicating with a corresponding gas channel to allow gas flow through each channel, such as to the adjacent purification unit 1. In another embodiment, as shown... Figure 14As shown, the middle end plate 21 is also provided with a first air hole 35 and a second air hole 37, and hydrogen tank 34 and waste gas tank 36 are respectively provided on both sides, so that when two different purification units 1 are connected at its two ends, it can be connected with the hydrogen tank 34 or waste gas tank 36 of the corresponding purification unit 1 to better receive and transport the leaked hydrogen or waste gas.

[0068] Furthermore, in this embodiment, multiple purification units 1 are defined to cooperate to form a purification unit 31. The purifier may include one purification unit 31 or multiple purification units 31. When multiple purification units 31 are included, adjacent purification units 31 can be connected by graphite paper 24. The graphite paper 24 also has the same shape as the filter plate assembly, hydrogen flow channel plate 9, and exhaust gas plate assembly, and its edge is provided with an annular portion 2 communicating with the gas channel at each gas channel.

[0069] Optionally, combined Figure 5 As shown, in this embodiment, slots 23 are provided at the edges of each annular portion 2 adjacent to the corresponding plate. The slots 23 of the annular portions 2 located in the same gas channel are interconnected to form elongated plate-shaped slots 23. The hydrogen gas port 11, the hydrogen-rich gas port 11, and the exhaust gas port are all connected to the elongated plate-shaped slots 23. A gas filter is inserted into the elongated plate-shaped slot 23. When each gas enters or exits the corresponding gas port, it will be filtered by the gas filter. In this embodiment, the design of the filter and slots 23 can not only make the obtained hydrogen purer, but also play a certain limiting role in the installation and positioning of each plate.

[0070] Continue to combine Figures 1 to 3 As shown, the purifier in this embodiment also includes a top plate 25 and a bottom plate 26 for clamping multiple purification units 1. The top plate 25 and bottom plate 26 have the same shape as the filter plate assembly, hydrogen flow channel plate 9, and exhaust gas plate assembly, such as being rectangular. The top plate 25 and bottom plate 26 have screw holes corresponding to each gas channel for inserting bolts 27. In this embodiment, the diameter of the bolt 27 is smaller than the inner diameter of the corresponding gas channel, allowing gas to flow through the gap between the gas channel and the bolt 27. To ensure sealing, both ends of the bolt 27 extend beyond the top plate 25 and bottom plate 26, and are sealed using nuts 28 and gaskets 29. As shown in the figure, the top plate 25 in this embodiment has multiple channels 30 inside, one end of which communicates with the corresponding gas channel, and the other end of which extends outside the top plate 25. These channels 30 are used to transport hydrogen, exhaust gas, and hydrogen-rich gas, respectively. The other end of each channel 30 can be led out or introduced into the purifier through a pipe. Additionally, in another embodiment, such as Figure 15As shown, in this embodiment, the top plate 25 and the bottom plate 26 are provided with first vent 35 and second vent 37 at each corresponding channel formed by the first vent 35 and the second vent 36. Gas pipes 38 are also provided, respectively communicating with the first vent 35 and the second vent 37, for conveying leaked hydrogen or waste gas. This method effectively prevents gas from leaking to the outside, or different gases from leaking into other gas channels or passages, thus avoiding pollution and affecting gas purity.

[0071] Taking a rectangular purifier as an example, in this embodiment, when the purifier is used in practical applications, the edges of each plate in each purification unit 1 are first attached to each other and welded. Then, as needed, intermediate partitions and graphite paper 24 are welded into multiple purification units 1 to form multiple monomers 31. The specific number can be determined according to actual needs. Next, the multiple monomers 31 can be stacked on the base plate 26. The side of the purification monomer 31 in contact with the base plate 26 is also sealed with graphite paper 24. When the sealing is completed and each plate is aligned with the base plate 26, the top plate 25 is covered. Bolts 27 are inserted at the four corners, i.e., at each gas passage. The two ends of the bolts 27 are sealed and tightened with sealing nuts and sealing gaskets 29 to ensure that the four gas passages are airtight. When tightening the bolts 27, it is necessary to ensure that the tightening force of each bolt 27 is consistent to avoid uneven stress and structural deformation.

[0072] When the purifier is used in a gas preparation device, the entire device needs to be preheated in the initial stage of gas preparation. At this time, fuel can be burned in the device to generate high-temperature flue gas. The high-temperature flue gas passes through the flue gas hole 20 and enters the flue gas flow channel 10 to heat up and exchange heat for the entire purifier. The flue gas after heat exchange is discharged from the flue gas hole 20 on the other side of the purifier. When the overall temperature of the device reaches a constant temperature, hydrogen production begins. When the device is working, it generates a large amount of hydrogen-rich gas. The hydrogen-rich gas enters the hydrogen-rich gas channel 3 through the hydrogen-rich gas inlet pipe of the top plate 25, and flows along the gap between the channel and the screw to the waste gas channel plate 12. It enters the gas channel 14 and comes into full contact with the filter plate assembly. After being filtered by the fine holes on the mesh plate 6, it reaches the front of the filter membrane. After being filtered by the filter membrane, hydrogen and waste gas are formed. The hydrogen passes through the filter membrane and another mesh plate 6 and enters the hydrogen channel plate 9 along the hydrogen channel 4. The waste gas that does not pass through the filter membrane returns to the gas channel 14 and flows to the waste gas channel 5 for discharge. The hydrogen flows from the hydrogen channel to the hydrogen channel 4 and is transported to the channel in the top plate 25 for transporting hydrogen, and is then transported to the corresponding pipeline through this channel.

[0073] Another embodiment of the present invention also provides a gas preparation apparatus, including a purifier as described in any of the embodiments above. For example, this gas preparation apparatus can be used to prepare hydrogen, nitrogen, etc.

[0074] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A purifier, characterized in that, The purification unit includes multiple stacked and fixedly connected purification units, each purification unit comprising: Filter plate assembly, used to filter hydrogen-rich gas, forming hydrogen and exhaust gas; A hydrogen flow channel plate covers one side of the filter plate assembly and is used to receive and guide the hydrogen gas; an exhaust gas plate assembly covers the other side of the filter plate assembly and is used to receive the hydrogen-rich gas, so that the hydrogen-rich gas is in full contact with the filter plate assembly, while guiding the exhaust gas. The filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly are identical in shape and each has annular portions formed at multiple points on its outer edge in a direction perpendicular to the purification unit. These annular portions form gas channels that penetrate the purification unit. The different gas channels are used to form hydrogen-rich gas channels, hydrogen gas channels, and exhaust gas channels, respectively. The hydrogen flow channel plate is connected to the hydrogen gas channels to guide the hydrogen gas into the hydrogen gas channels. The exhaust gas plate assembly is connected to the hydrogen-rich gas channels and the exhaust gas channels to receive the hydrogen-rich gas and guide the exhaust gas into the exhaust gas channels. At least one of the hydrogen flow channel plates has a hydrogen tank for containing leaked hydrogen at its edge and a first vent connected to the hydrogen tank for discharging the leaked hydrogen. At least a portion of the exhaust gas plate assembly has an exhaust gas tank for containing leaked exhaust gas at its edge. The exhaust gas plate assembly, the hydrogen flow channel plate, and the filter plate assembly are all provided with corresponding second vents. The exhaust gas tank is connected to the second vents to discharge the leaked exhaust gas through a plurality of second vents.

2. The purifier according to claim 1, characterized in that, The filter plate assembly includes at least one mesh plate, a hydrogen permeation membrane connected to the mesh plate, and a membrane support frame for the hydrogen permeation membrane. The mesh plate, the hydrogen permeation membrane, and the membrane support frame are all the same shape as the filter plate assembly, the hydrogen flow channel plate, and the exhaust gas plate assembly, and are fixedly connected to each other. The edges of the mesh plate, the hydrogen permeation membrane, and the membrane support frame are provided with an annular portion that communicates with each gas channel. The mesh plate includes one or two pieces. When there is one piece, the mesh plate is connected to one side of the membrane support frame. When there are two pieces, the hydrogen permeation membrane and the membrane support frame of the hydrogen permeation membrane are sandwiched between the two mesh plates.

3. The purifier according to claim 1, characterized in that, The hydrogen flow channel plate is recessed on the side facing the filter plate assembly to form multiple hydrogen flow channels. The edge of the hydrogen flow channel plate is provided with an elongated hydrogen groove, a first gas hole communicating with the hydrogen groove, and a hydrogen gas hole communicating with the hydrogen channel and the hydrogen flow channel. The exhaust gas plate assembly includes an exhaust gas duct plate that covers the other side of the filter plate assembly and an exhaust gas end plate that covers the exhaust gas duct plate. The exhaust gas duct plate is recessed on the side facing the filter plate assembly to form multiple gas channels, and the exhaust gas groove is opened at the edge of the exhaust gas duct plate. The exhaust gas end plate has a hydrogen-rich gas hole and a first guide groove connected to the hydrogen-rich gas channel at one edge facing the exhaust gas channel, as well as an exhaust gas hole and a second guide groove connected to the exhaust gas channel. The waste gas flow channel plate has an air inlet corresponding to the first guide groove, which is connected to the first guide groove and the gas flow channel, for introducing the hydrogen-rich gas from the hydrogen-rich gas channel into the gas flow channel. At the same time, the waste gas flow channel plate has an air outlet corresponding to the second guide groove, which is connected to the second guide groove and the gas flow channel, for introducing the waste gas into the waste gas channel.

4. The purifier according to claim 1, characterized in that, The purification unit also includes a flue gas plate assembly with the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly. It covers the side of the hydrogen flow channel plate away from the filter plate assembly and is used to introduce and export high-temperature flue gas for preheating the purification unit. The edge of the flue gas plate assembly is provided with an annular part that communicates with the air passage at each air passage, and the first air hole and the second air hole are also provided at each first air hole and the second air hole. The flue gas plate assembly includes a hydrogen-flue gas end plate that covers the hydrogen flow channel plate and a flue gas end plate that covers the hydrogen-flue gas end plate. The hydrogen-flue gas end plate is recessed on one side facing the flue gas end plate to form multiple flue gas channels. The hydrogen-flue gas end plate and the flue gas end plate have grooves that are respectively connected to the outside and the flue gas channels on the side along the direction perpendicular to the purification unit. The grooves at the corresponding positions cooperate to form flue gas holes.

5. The purifier according to claim 3, characterized in that, The two adjacent purification units are connected by an intermediate end plate. The intermediate end plate has the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly. At its edge, there is an annular part that communicates with each of the gas channels. At each of the gas channels, there is a gas port that communicates with each gas for conveying different gases. At each of the first gas hole and the second gas hole, there is also a first gas hole and a second gas hole. At the same time, hydrogen tanks and exhaust gas tanks are respectively provided on both sides of the intermediate end plate.

6. The purifier according to claim 5, characterized in that, Each of the annular portions has a slot near the edge of the corresponding plate. The slots of the annular portions located in the same gas channel are interconnected to form a long plate-shaped slot. The hydrogen gas vent, the hydrogen-rich gas vent, and the exhaust gas vent are all connected to the long plate-shaped slot. A gas filter is inserted into the long plate-shaped slot.

7. The purifier according to claim 1 or 5, characterized in that, Multiple purification units cooperate to form a purification unit. The purifier includes multiple purification units. The multiple purification units, purification units, and each plate are connected by welding with a metal plating layer. The two adjacent purified monomers are connected by graphite paper. The graphite paper has the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly, and its edge is provided with an annular part that communicates with each of the gas channels.

8. The purifier according to claim 1, characterized in that, The purifier also includes a top plate and a bottom plate for clamping multiple purification units. The top plate and bottom plate have the same shape as the filter plate assembly, hydrogen flow channel plate, and exhaust gas plate assembly, and each of the gas channels is provided with a screw hole for inserting a bolt. The bolt's shank diameter is smaller than the inner diameter of the corresponding gas channel so that gas can flow through the gap between the gas channel and the bolt. Both ends of the bolt extend out of the top plate and bottom plate and are sealed to the corresponding top plate or bottom plate based on a nut and a gasket. The top plate and bottom plate are provided with gas pipes that are respectively connected to the first air hole and the second air hole for transporting gas. The top plate has multiple channels with one end connected to the corresponding air duct and the other end extending to the outside of the top plate. The multiple channels are respectively used to transport hydrogen-rich gas, hydrogen gas and waste gas.

9. A gas preparation apparatus, characterized in that, Includes the purifier as described in any one of claims 1-8.

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