Purification equipment with high purification efficiency

Abstract

The utility model discloses purification equipment with high purification efficiency, and relates to the technical field of hydrogen production, the purification equipment comprises a purification box body, two drying mechanisms, a filtering mechanism, a fixing mechanism and a gas return mechanism, the two drying mechanisms are respectively arranged in one open pore, a control panel is arranged at the left upper corner of the front side wall of the purification box body, and the filtering mechanism is arranged on the left upper corner of the purification box body. The filtering mechanism is arranged at the middle position in the purification box body, the fixing mechanism is arranged at the middle position of the top wall of the purification box body, and the air return mechanism is arranged on the front side face of the purification box body. The silica gel desiccant in the accommodating barrel is in full contact with the hydrogen, so that the effect of absorbing moisture in the hydrogen is improved, and the purification efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen production technical field especially relates to a purification equipment with high purification efficiency. BACKGROUND

[0002] Hydrogen is an environmental protection type energy, when hydrogen is produced, hydrogen contains certain amount of moisture and impurities, so hydrogen needs to be purified.

[0003] The existing purification equipment is inconvenient to install the purification assembly during installation and use, which leads to inconvenient replacement of the assembly in the later period, and the moisture in hydrogen cannot be effectively removed, which brings certain adverse effects to the use process of people. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of purification equipment with high purification efficiency to solve at least any one problem raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of purification equipment with high purification efficiency, including purification box, two drying mechanisms, filter mechanism, fixed mechanism and back gas mechanism;

[0006] The left side wall of the purification box is provided with a gas inlet pipe, and the right side wall is provided with a gas outlet pipe, one end of the gas inlet pipe and the gas outlet pipe adjacent to each other penetrates through the corresponding side wall of the purification box and communicates with the inside of the purification box, and the gas inlet pipe and the gas outlet pipe are fixedly connected with the purification box, a hole is formed in the middle of the top wall of the purification box, close to the positions of both sides, two drying mechanisms are arranged in one of the holes respectively, and a control panel is arranged at the upper left corner of the front side wall of the purification box.

[0007] The drying mechanism includes a driving motor, a mounting plate, four mounting bolts, a containing cylinder, a rotating rod and a spiral stirring blade, a plurality of through holes are formed at equal intervals on the outer wall of the containing cylinder, and silica gel drying agent is contained in the containing cylinder, the containing cylinder is fixedly connected with the mounting plate at the middle position of the top wall of the driving motor, the bottom of the containing cylinder is inserted into the purification box from the hole, the driving motor is fixedly connected at the middle position of the top wall of the mounting plate, the driving motor is electrically connected with the control panel, one end of the rotating rod is fixedly connected with the output end of the driving motor, and the other end penetrates through the mounting plate and the top wall of the containing cylinder and is inserted into the containing cylinder, the spiral stirring blade is fixedly connected to the outer wall of the rotating rod in the containing cylinder, the rotating rod is rotatably connected with the mounting plate and the containing cylinder, the four mounting bolts penetrate through the four corner positions of the mounting plate respectively and are screw-connected with the mounting plate, the top wall of the purification box is provided with a mounting bolt hole corresponding to the four mounting bolts, and the four mounting bolts are screw-connected with the corresponding mounting bolt holes respectively.

[0008] The filtering mechanism is arranged at the middle position in the purification box, the fixing mechanism is arranged at the middle position of the top wall of the purification box, and the air returning mechanism is arranged at the front side of the purification box.

[0009] Preferably, the top wall of the containing cylinder is provided with a charging port at a position corresponding to the right side, and the charging port is provided with a rubber plug.

[0010] Preferably, the top wall of the purification box is provided with a mounting port at a middle position, and the mounting port is outwardly extended to form a platform at one side; the inner wall of the purification box is symmetrically provided with a mounting groove at the lower end of the mounting port; the inner wall of the purification box is provided with a sliding groove at a position close to the two sides of the mounting groove; the filtering mechanism comprises two filtering assemblies; each filtering assembly comprises two T-shaped sliding plates and a fixed frame; the inner wall of one of the fixed frames is fixedly connected with a filter screen; the inner wall of the other fixed frame is fixedly connected with an activated carbon filter plate; the sum of the widths of the two fixed frames is matched with the width of the mounting groove and the mounting port, and the top wall of the fixed frame is flush with the platform; and the protruding portions of the two T-shaped sliding plates are slidably connected with the corresponding sliding grooves.

[0011] Preferably, the fixing mechanism comprises a sealing plate matched with the platform, a rubber pad and two fixing assemblies; the rubber pad is fixedly connected to the bottom of the sealing plate; the two fixing assemblies are symmetrically arranged at the two ends of the sealing plate; the fixing assembly comprises a connecting plate, a fixed plate and a fixed bolt; one end of the fixed plate is fixedly connected to the side wall of the purification box at a position close to the top; the bottom wall of the connecting plate is fixedly connected to the top wall of the sealing plate at a position close to one end; and one end of the fixed bolt penetrates through the middle position of the top wall of the connecting plate and the fixed plate and is threadedly connected with the connecting plate and the fixed plate.

[0012] Preferably, the air returning mechanism comprises a supporting plate, an air returning pump, an air suction pipe, a gas conveying pipe and an air inlet pipe; one end of the supporting plate is fixedly connected to the front side wall of the purification box at a position close to the bottom; the air returning pump is fixedly connected to the top wall of the supporting plate; one end of the air suction pipe is fixedly connected to the air inlet of the air returning pump, and the other end of the air suction pipe penetrates through the purification box and is in communication with the inner half of the purification box; the gas conveying pipe is fixedly connected to the air outlet of the air returning pump, and the other end of the gas conveying pipe penetrates through the outer wall of the air inlet pipe and is in communication with the inner wall of the air inlet pipe; the air inlet pipe, the air outlet pipe, the air suction pipe and the gas conveying pipe are fixedly connected with the purification box; and the air inlet pipe, the air outlet pipe, the air suction pipe and the gas conveying pipe are all provided with electric control valves, and the four electric control valves are electrically connected with the control panel.

[0013] Preferably, the bottom wall of the right half of the purification box is provided with a hydrogen purity detection device, and the hydrogen purity detection device is electrically connected with the control panel.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. Once the fixing mechanism is removed, the purification mechanism can be taken out to replace the filter screen or activated carbon filter plate. The quick disassembly and assembly of the purification mechanism makes it easy to replace, thus ensuring the purification effect of the purification mechanism.

[0016] 2. Starting the drive motor rotates the rotating rod, causing the spiral agitator to stir the silica gel desiccant. This ensures more thorough contact between the silica gel desiccant and hydrogen. By stirring the silica gel desiccant, the desiccant in the container is fully in contact with the hydrogen, maximizing its effectiveness. This improves the absorption of moisture from the hydrogen, reduces the need for re-purification due to insufficient purity, and increases purification efficiency. Simultaneously, it makes full use of the desiccant, avoiding waste and reducing economic losses, thus greatly enhancing the practicality of the purification equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is an exploded view of the purification chamber of this utility model;

[0019] Figure 3 This is a cross-sectional view of the mounting plate and the receiving cylinder of this utility model;

[0020] Figure 4 This is a cross-sectional view of the purification chamber of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the fixing mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the fixed frame of this utility model.

[0023] In the diagram: 1. Purification chamber; 2. Exhaust pipe; 3. Fixing mechanism; 31. Sealing plate; 32. Connecting plate; 33. Fixing bolt; 34. Fixing plate; 35. Rubber pad; 4. Drying mechanism; 41. Drive motor; 42. Mounting plate; 43. Mounting bolt; 44. Receiving cylinder; 45. Mounting bolt hole; 46. Silica gel desiccant; 47. Through hole; 48. Rotating rod; 49. Spiral agitator blade; 5. Inlet pipe; 6. 61. Gas return mechanism; 62. Gas return pump; 63. Support plate; 64. Gas extraction pipe; 7. Gas delivery pipe; 8. Electrically controlled valve; 9. Control panel; 10. Filtration mechanism; 11. T-shaped slide plate; 12. Fixing frame; 13. Filter screen; 14. Activated carbon filter plate; 15. Slide groove; 16. Mounting groove; 17. Opening; 18. Platform; 19. Mounting port; 10. Hydrogen purity detection device; 11. Filling port; 12. Rubber stopper. Detailed Implementation

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0025] The utility model provides a kind of purification equipment with high purification efficiency as Figures 1-6 As shown in a kind of purification equipment with high purification efficiency, including purification box 1, two drying mechanisms 4, filter mechanism 9, fixed mechanism 3 and back gas mechanism 6;

[0026] Purification box 1 left side wall is equipped with gas inlet pipeline 5 and right side wall is equipped with gas outlet pipeline 2, the end adjacent to gas inlet pipeline 5 and gas outlet pipeline 2 is respectively penetrated through the side wall of corresponding purification box 1 and is communicated with the inside of purification box 1, gas inlet pipeline 5 and gas outlet pipeline 2 are all fixedly connected with purification box 1, the middle of purification box 1 top wall is close to the position of both sides and is equipped with one aperture 12, two drying mechanisms 4 are respectively arranged in one aperture 12, the left upper corner position of the front side wall of purification box 1 is equipped with control panel 8;

[0027] Drying mechanism 4 includes drive motor 41, mounting plate 42, four mounting bolts 43, containing cylinder 44, rotating rod 48 and spiral stirring blade 49, multiple through holes 47 are equidistantly formed on the outer wall of containing cylinder 44, and silica gel drying agent 46 is contained in containing cylinder 44, containing cylinder 44 top is fixedly connected with the middle position of mounting plate 42 bottom, the bottom of containing cylinder 44 is inserted into purification box 1 from aperture 12, drive motor 41 is fixedly connected in the middle position of mounting plate 42 top wall, drive motor 41 is electrically connected with control panel 8, one end of rotating rod 48 is fixedly connected with the output end of drive motor 41, and the other end is penetrated through mounting plate 42 and the top wall of containing cylinder 44 and is inserted into containing cylinder 44, spiral stirring blade 49 is fixedly connected on the outer wall of rotating rod 48 in containing cylinder 44, rotating rod 48 is rotatably connected with mounting plate 42 and containing cylinder 44, four mounting bolts 43 are respectively penetrated through the corner positions of mounting plate 42 and are threadedly connected with mounting plate 42, the top wall of corresponding purification box 1 is equipped with mounting bolt hole 45, and four mounting bolts 43 are respectively threadedly connected in corresponding mounting bolt hole 45;

[0028] Filter mechanism 9 is arranged at the middle position in purification box 1, fixed mechanism 3 is arranged at the middle position of purification box 1 top wall, back gas mechanism 6 is arranged at the front side of purification box 1.

[0029] Before using the device, the device is connected to the power supply, and then the two drive motors 41 are started through the dynamic control panel 8. The hydrogen in the storage device is transported into the left half of the purification box body 1 through the gas inlet pipe 5. The silica gel desiccant 46 in the containing cylinder 44 can actively absorb the moisture in the hydrogen. The drive motor 41 drives the rotating rod 48 to rotate, so that the spiral stirring blade 49 rotates, and the silica gel desiccant 46 in the containing cylinder 44 is stirred, so that the silica gel desiccant 46 in the containing cylinder 44 is in more sufficient contact with the hydrogen, thereby improving the efficiency of absorbing the moisture in the hydrogen. The filter screen 93 and the activated carbon filter plate 94 further filter the impurities and moisture in the hydrogen, so that the hydrogen is further purified by passing through the filter screen 93 and the activated carbon filter plate 94. When the hydrogen enters the right half of the purification box body 1, the drying mechanism 4 in the right half again absorbs the moisture in the hydrogen, so that the purity of the hydrogen is improved again. The installation plate 42 and the installation bolt 43 facilitate the removal of the drying mechanism 4 for maintenance. The silica gel desiccant 46 can be added or replaced through the charging port 16, and the rubber plug 17 is tightly plugged in the charging port 16 to prevent the silica gel desiccant 46 from spilling out of the charging port 16. The hydrogen purity detection device 15 (the hydrogen purity detection device 15 detects the purity of the hydrogen. When the hydrogen purity is detected to be substandard, information will be transmitted to the mainboard in the control panel 8) can detect the hydrogen in the right half of the purification box body 1. When the hydrogen purity entering the gas outlet pipe 2 is substandard, the control panel 8 closes the electric control valve 7 on the gas outlet pipe 2, starts the gas return pump 61, and opens the electric control valve 7 on the gas suction pipe 63. The hydrogen in the gas outlet pipe 2 is transported into the gas inlet pipe 5 (the electric control valve 7 on the gas inlet pipe 5 can prevent the hydrogen in the purification box body 1 from flowing back when the gas inlet pipe 5 is transporting hydrogen) through the gas suction pipe 63 and the gas conveying pipe 64, and then the hydrogen is transported into the purification box body 1 for purification treatment again. After the hydrogen purity reaches the standard, the electric control valve 7 on the gas suction pipe 63 and the gas return pump 61 are closed, and the electric control valve 7 on the gas outlet pipe 2 is opened to transport the standard hydrogen through the gas outlet pipe 2 to the collection device for collection.

[0030] The top wall of the containing cylinder 44 near the right side corresponds to the position of the installation plate 42, and the charging port 16 is provided in the corresponding position of the installation plate 42. The charging port 16 is plugged with a rubber plug 17.

[0031] The charging port 16 facilitates the loading of silica gel desiccant 46 into the containing cylinder 44 and the pouring of silica gel desiccant 46 out of the containing cylinder 44. The rubber plug 17 is plugged into the charging port 16 of the containing cylinder 44 and the installation plate 42 to block the charging port 16, preventing the silica gel desiccant 46 in the containing cylinder 44 from spilling out.

[0032] The middle position of the top wall of the purification box 1 is provided with a mounting port 14, and the mounting port 14 is extended outwardly to form a platform 13 around the mounting port 14. The inner walls of the purification box 1 below the two ends of the mounting port 14 are symmetrically provided with mounting grooves 11. The inner walls of the purification box 1 near the two side positions of the mounting grooves 11 are provided with sliding grooves 10. The filtering mechanism 9 comprises two filtering assemblies. Each filtering assembly comprises two T-shaped sliding plates 91 and a fixed frame 92. One of the two T-shaped sliding plates 91 is fixedly connected to one end of the fixed frame 92. The inner wall of the other fixed frame 92 is fixedly connected with a filter screen 93. The inner wall of the other fixed frame 92 is fixedly connected with an activated carbon filter plate 94. The sum of the widths of the two fixed frames 92 is matched with the width of the mounting groove 11 and the mounting port 14, and the top wall of the fixed frame 92 is flush with the platform 13. The protruding portions of the two T-shaped sliding plates 91 are respectively connected with the corresponding sliding grooves 10. The fixing mechanism 3 comprises a sealing plate 31 matched with the platform 13, a rubber pad 35 and two fixing assemblies. The rubber pad 35 is fixedly connected to the bottom of the sealing plate 31. The two fixing assemblies are symmetrically arranged at the two ends of the sealing plate 31. Each fixing assembly comprises a connecting plate 32, a fixed plate 34 and a fixed bolt 33. One end of the fixed plate 34 is fixedly connected to the top position of the side wall of one end of the purification box 1. The bottom wall of the connecting plate 32 on the same side is fixedly connected to the top wall near one end of the sealing plate 31. One end of the fixed bolt 33 penetrates the middle position of the top wall of the connecting plate 32 and the fixed plate 34 and is threadedly connected with the connecting plate 32 and the fixed plate 34.

[0033] Before the purification of hydrogen, the staff respectively take the two fixed frames 92 with the filter screen 93 and the activated carbon filter plate 94, align the protruding ends of the T-shaped sliding plates 91 at the two ends of one of the fixed frames 92 with the two sliding grooves 10 on the same side, insert the protruding ends of the T-shaped sliding plates 91 into the sliding grooves 10, and slide the fixed frame 92 downward along the mounting groove 11. The thickness of the fixed wall of the T-shaped sliding plate 91 is matched with the mounting groove 11. After the two fixed frames 92 are inserted into the sliding grooves 10, the top wall of the two fixed frames 92 combined together is matched with the size of the mounting port 14, and the top wall of the two fixed frames 92 is flush with the platform 13. When it is necessary to purify hydrogen containing different sizes of impurities, the filter screen 93 with different pore sizes can be replaced to filter hydrogen containing different impurities. After the fixed frame 92 is placed, the sealing plate 31 is placed on the platform 13, and the fixed bolt 33 is screwed into the threaded holes on the connecting plate 32 and the fixed plate 34 to fix the sealing plate 31. The rubber pad 35 seals the mounting port 14 to prevent hydrogen from leaking out.

[0034] The back gas mechanism 6 comprises a support plate 62, a back gas pump 61, a gas suction pipe 63, a gas conveying pipe 64, and the support plate 62 is fixedly connected to the middle position of the front side wall of the purification box body 1 near the bottom, the back gas pump 61 is fixedly connected to the top wall of the support plate 62, one end of the gas suction pipe 63 is fixedly connected with the gas inlet of the back gas pump 61 and the other end of the gas suction pipe 63 penetrates through the purification box body 1 and communicates with the right half of the purification box body 1, and the gas suction pipe 63 is fixedly connected with the purification box body 1, one end of the gas conveying pipe 64 is fixedly connected with the gas outlet of the back gas pump 61 and the other end of the gas conveying pipe 64 penetrates through the outer wall of the gas inlet pipe 5 and communicates with the gas inlet pipe 5, and the gas conveying pipe 64 is fixedly connected with the gas inlet pipe 5, and the gas inlet pipe 5, the gas outlet pipe 2, the gas suction pipe 63 and the gas conveying pipe 64 are all provided with electric control valves 7 on the outer walls, and the four electric control valves 7 are electrically connected with the control panel 8, and the bottom wall of the right half of the purification box body 1 is provided with a hydrogen purity detection device 15, and the hydrogen purity detection device 15 is electrically connected with the control panel 8.

[0035] The hydrogen purity detection device 15 detects the purity of hydrogen, and when the hydrogen purity is detected to be substandard, information is transmitted to the mainboard in the control panel 8, when the hydrogen purity detection device 15 detects that the hydrogen in the right half of the purification box body 1 is substandard, the control panel 8 closes the electric control valve 7 on the gas outlet pipe 2, starts the back gas pump 61 and opens the electric control valve 7 on the gas suction pipe 63, and the hydrogen in the gas outlet pipe 2 is conveyed into the gas inlet pipe 5 (the electric control valve 7 on the gas inlet pipe 5 can prevent the hydrogen in the purification box body 1 from flowing back when the gas inlet pipe 5 is conveying hydrogen) through the gas suction pipe 63 and the gas conveying pipe 64, and the hydrogen is conveyed into the purification box body 1 again for purification treatment, and when the hydrogen purity reaches the standard, the electric control valve 7 on the gas suction pipe 63 and the back gas pump 61 are closed, and the electric control valve 7 on the gas outlet pipe 2 is opened to convey the hydrogen reaching the standard to the collection device through the gas outlet pipe 2 for collection.

[0036] Finally, it should be noted that the above-described only preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still be modified to the technical solutions recorded in the foregoing embodiments, or some of the technical features are replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A purification device with high purification efficiency, characterized in that: Including purification box (1), two drying mechanism (4), filter mechanism (9), fixed mechanism (3) and back gas mechanism (6); The left side wall of the purification box (1) is provided with an air inlet pipeline (5), and the right side wall is provided with an air outlet pipeline (2). The adjacent ends of the air inlet pipeline (5) and the air outlet pipeline (2) penetrate through the corresponding side walls of the purification box (1) and communicate with the inside of the purification box (1). The air inlet pipeline (5) and the air outlet pipeline (2) are fixedly connected with the purification box (1). The middle of the top wall of the purification box (1) is provided with an opening (12) near the two sides. Two drying mechanisms (4) are arranged in one of the openings (12). The front side wall of the purification box (1) is provided with a control panel (8) at the upper left corner. The drying mechanism (4) comprises a driving motor (41), a mounting plate (42), four mounting bolts (43), a containing cylinder (44), a rotating rod (48) and a spiral stirring blade (49). A plurality of through holes (47) are formed at equal intervals in the outer wall of the containing cylinder (44), and silica gel drying agent (46) is contained in the containing cylinder (44). The top of the containing cylinder (44) is fixedly connected with the middle of the bottom of the mounting plate (42). The bottom of the containing cylinder (44) is inserted into the purification box (1) from the opening (12). The driving motor (41) is fixedly connected to the middle of the top wall of the mounting plate (42). The driving motor (41) is electrically connected with the control panel (8). One end of the rotating rod (48) is fixedly connected with the output end of the driving motor (41), and the other end penetrates through the mounting plate (42) and is inserted into the containing cylinder (44). The spiral stirring blade (49) is fixedly connected to the outer wall of the rotating rod (48) in the containing cylinder (44). The rotating rod (48) is rotatably connected with the mounting plate (42) and the containing cylinder (44). Four mounting bolts (43) penetrate through the four corner positions of the mounting plate (42) and are screwed with the mounting plate (42). The top wall of the purification box (1) is provided with a mounting bolt hole (45) corresponding to the four mounting bolts (43), and the four mounting bolts (43) are screwed with the corresponding mounting bolt holes (45). The filter mechanism (9) is arranged in the middle of the purification box (1). The fixed mechanism (3) is arranged in the middle of the top wall of the purification box (1). The back gas mechanism (6) is arranged on the front side of the purification box (1).

2. The purification apparatus of claim 1, wherein: The top wall of the containing cylinder (44) is provided with a charging port (16) near the right side corresponding to the mounting plate (42). The charging port (16) is plugged with a rubber plug (17).

3. The purification apparatus of claim 1, wherein: The middle position of the top wall of the purification box (1) is provided with a mounting port (14), and the mounting port (14) is extended outward to form a platform (13) around the mounting port (14), the inner wall of the purification box (1) below the two ends of the mounting port (14) is symmetrically provided with a mounting groove (11), the inner wall of the purification box (1) near the two side positions of the mounting groove (11) is provided with a sliding groove (10), the filtering mechanism (9) comprises two filtering assemblies, the filtering assembly comprises two T-shaped sliding plates (91) and a fixed frame (92), the two T-shaped sliding plates (91) are fixedly connected at the two ends of the fixed frame (92), respectively, one inner wall of the fixed frame (92) is fixedly connected with a filter screen (93), and the other inner wall of the fixed frame (92) is fixedly connected with an activated carbon filter plate (94), the sum of the widths of the two fixed frames (92) is matched with the width of the mounting groove (11) and the mounting port (14), and the top wall of the fixed frame (92) is flush with the platform (13), and the protruding parts of the two T-shaped sliding plates (91) are slidably connected with the corresponding sliding grooves (10), respectively.

4. The purification apparatus of claim 1, wherein: The sealing plate (31) is matched with the platform (13), the rubber pad (35) is fixedly connected to the bottom of the sealing plate (31), and the two fixing assemblies are symmetrically arranged at the two ends of the sealing plate (31), respectively. The fixing assembly comprises a connecting plate (32), a fixed plate (34) and a fixed bolt (33), one end of the fixed plate (34) is fixedly connected with the top position of the side wall of one end of the purification box (1), the bottom wall of the connecting plate (32) on the same side is fixedly connected with the top wall of the sealing plate (31) near one end, and one end of the fixed bolt (33) penetrates the middle position of the top wall of the connecting plate (32) and the fixed plate (34) and is screwed with the connecting plate (32) and the fixed plate (34).

5. The purification apparatus of claim 1, wherein: The air return mechanism (6) comprises a supporting plate (62), an air return pump (61), an air suction pipe (63), a gas conveying pipe (64) and, one end of the supporting plate (62) is fixedly connected to the middle position of the bottom of the front side wall of the purification box (1), the air return pump (61) is fixedly connected to the top wall of the supporting plate (62), one end of the air suction pipe (63) is fixedly connected with the air inlet of the air return pump (61), the other end of the air suction pipe (63) penetrates the purification box (1) and communicates with the inner half of the purification box (1), the air return pump (61) is fixedly connected with the purification box (1), one end of the gas conveying pipe (64) is fixedly connected with the air outlet of the air return pump (61), the other end of the gas conveying pipe (64) penetrates the outer wall of the air inlet pipe (5) and communicates with the inner wall of the air inlet pipe (5), the gas conveying pipe (64) is fixedly connected with the air inlet pipe (5), and the air inlet pipe (5), the air outlet pipe (2), the air suction pipe (63) and the gas conveying pipe (64) are provided with electric control valves (7) on the outer walls, and the four electric control valves (7) are electrically connected with the control panel (8).

6. The purification apparatus of claim 1, wherein: The bottom wall of the right half of the purification box (1) is provided with a hydrogen purity detection device (15), and the hydrogen purity detection device (15) is electrically connected with the control panel (8).

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