A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas

Abstract

The invention relates to the technical field of gas recovery and purification, and specifically to a multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas, comprising a placement seat and a support plate arranged on one side of the placement seat, a recovery tank is arranged on the support plate, a drive component is arranged inside the recovery tank, a purification chamber is arranged inside the recovery tank, and the purification chamber is used to cooperate with the drive component to break up the gas entering the chamber to form small bubbles, thereby increasing the contact area between the gas and water. The invention can break up the gas to form small bubbles during the chemical purification process of the two gases, thereby increasing the contact area and improving the purification effect. At the same time, after the chemical purification is completed, physical adsorption treatment can be performed again, and secondary treatment can be performed to achieve the advantages of multiple treatment and purification. At the same time, after the purification is completed, the two gases can be separated to form separate individuals, so that they can be used directly when needed later without the need for separation operation.

Description

Technical Field

[0001] The invention relates to the technical field of gas recovery and purification, in particular to a multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gases. Background Art

[0002] Sulfur hexafluoride and perfluoroisobutyronitrile gas are arc-extinguishing gases used in high-voltage switchgear. Perfluoroisobutyronitrile gas has more advantages than sulfur hexafluoride, and perfluoroisobutyronitrile gas is also a new type of environmentally friendly insulating gas. Both have unique properties and advantages when used.

[0003] Sulfur hexafluoride and perfluoroisobutyronitrile gases are used as arc-extinguishing gases for high-voltage switchgear. After use, they will produce some water-soluble impurities and toxic gases such as SO2, HF, and CO2. If these gases are not treated or purified after use and are directly discharged into the external environment, it will have an impact on the health of the surrounding workers. At the same time, sulfur hexafluoride and perfluoroisobutyronitrile gases are stable gases that can be recycled. Usually, the workers recycle them and put them back into the equipment for use.

[0004] Usually, when purifying sulfur hexafluoride and perfluoroisobutyronitrile gases, physical adsorption or chemical purification is usually used for purification. The chemical purification method is to directly inject the gas into water or chemical liquid to dissolve the toxic gas soluble in water in the gas and purify the gas. Most of the purification methods are chemical purification methods, which results in that other substances generated in the two gases cannot be completely removed during purification, affecting the subsequent reuse of the two gases. When the two gases enter the liquid for chemical purification, the gas will not stay in the liquid for a long time. At the same time, during the injection process, the gas will form a bubble so that the inside of the gas cannot be fully in contact with the liquid, which results in poor effect during the purification process. During the entire purification process, the gas cannot be broken up, so that the gas is broken into small bubbles, increasing the contact area, resulting in other impurity gases in the final purified gas that cannot be directly put into use. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas, which has the function of breaking up the two gases to form small bubbles during the chemical purification process, thereby increasing the contact area and improving the purification effect. At the same time, after the chemical purification is completed, physical adsorption treatment can be performed again for secondary treatment to achieve the advantages of multiple treatments and purifications. At the same time, after the purification is completed, the two gases can be separated into separate individuals, which is convenient for subsequent use when needed, and can be used directly without separation operation.

[0006] To achieve the above object, the present invention provides the following technical solution: a multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas, comprising a placement seat and a support plate arranged on one side of the placement seat, a recovery tank is arranged on the support plate, and a driving component is arranged inside the recovery tank, and a purification chamber is arranged inside the recovery tank, and the purification chamber is used to cooperate with the driving component to break up the gas entering the chamber to form small bubbles, thereby increasing the contact area between the gas and water;

[0007] The driving assembly includes a driving motor arranged on one side of the placement seat, a rotating shaft arranged on one side of the driving motor, an arc-shaped bevel tooth arranged on the end of the rotating shaft away from the driving motor, a bevel gear meshing with the arc-shaped bevel tooth, a sleeve arranged on the bevel gear passing through, and a reciprocating groove is opened inside the sleeve, and also includes a delivery pipe movably arranged inside the sleeve, and a ventilation pipe array is arranged on the end of the delivery pipe away from the sleeve.

[0008] Preferably, a locking block is provided at one end of the delivery tube close to the sleeve, and a limiting rod is provided at one end of the delivery tube away from the locking block.

[0009] Preferably, an air inlet pipe is provided on the recovery tank, an air outlet pipe is provided through one side of the recovery tank, a cabinet door is provided on one side of the recovery tank, and a locking cylinder is provided inside the purification chamber.

[0010] Preferably, a filling assembly is provided on the placement seat, a separation assembly is provided at one end of the outlet pipe away from the recovery tank, and the separation assembly is used to separate the two gases, and a filter assembly is provided outside the purification chamber, and the filter assembly is used to perform secondary purification on the gas.

[0011] Preferably, the filling assembly includes a liquid storage tank arranged on a placement seat, a circular support plate arranged on a side of the liquid storage tank away from the placement seat, an air pump arranged on a side of the circular support plate away from the liquid storage tank, an air supply pipe arranged on one side of the air pump, and the air supply pipe passes through the top of the liquid storage tank, and also includes a sealing plate movably arranged inside the liquid storage tank, and a liquid inlet pipe arranged inside the liquid storage tank.

[0012] Preferably, a water inlet is provided through one side of the liquid storage tank, a cross fixing frame is provided inside the liquid storage tank, and a pressure relief valve is provided on one side of the liquid storage tank close to the circular support plate.

[0013] Preferably, the filter assembly includes a filter chamber movably arranged outside the purification chamber, spherical rods arranged in an array on the filter chamber, and the spherical rods are slidably engaged with the recovery tank, and also includes a frame arranged inside the filter chamber, and an annular sealing plate movably arranged inside the filter chamber.

[0014] Preferably, a fixed block is provided on the side of the annular sealing plate close to the cabinet door, and a rotating plate is movably provided on the side of the fixed block away from the annular sealing plate, a spring array is provided on one side of the annular sealing plate, and the spring is fixedly connected to the inner wall of the filter bin away from the annular sealing plate, a sliding groove is provided on the side of the cabinet door close to the annular sealing plate, and the sliding groove and the rotating plate are engaged and slidable.

[0015] Preferably, the separation component includes an air compressor arranged on a placement seat, an air flow inlet pipe arranged on one side of the air compressor, a refrigeration device arranged at the other end of the air flow inlet pipe, an isolation chamber arranged at the other end of the refrigeration device, and a vent hole is opened on the isolation chamber, and also includes a separation chamber arranged inside the isolation chamber, and a first collection pipe is passed through the separation chamber.

[0016] Preferably, the placement seat is provided with a transfer tank at the bottom of the separation bin, and a one-way pipeline channel is installed between the transfer tank and the separation bin, and a second collecting pipe is provided on the transfer tank.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention cooperates with the driving component and the purification chamber. When the gas is sent into the purification chamber, the gas sent into the water can directly collide with the water through the up and down reciprocating movement of the vent pipe, so that the gas is broken into small bubbles, increasing its contact area, so that it can be maximized in the purification process and avoid incomplete gas purification.

[0019] 2. The filter assembly can perform secondary treatment on the purified gas, and adsorb other residual gases inside again, so that the final mixed gas contains pure sulfur hexafluoride and perfluoroisobutyronitrile gas. At the same time, the activated carbon plate installed on the filter assembly can also be quickly disassembled and replaced, so that the staff can remove the used activated carbon plate and replace it with a new one after the purification is completed;

[0020] 3. After obtaining pure sulfur hexafluoride and perfluoroisobutyronitrile gases, they will enter the separation component through the outlet pipe, and separate the two gases by using the difference in boiling points. The two gases are separated and enter their respective storage tanks, which is convenient for the staff to add corresponding gases according to the different added properties in subsequent use, and can be used directly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of the device of the present invention.

[0022] Figure 2 It is a schematic diagram of the side sectional structure of the overall part of the device of the present invention.

[0023] Figure 3It is a schematic diagram of the explosion structure inside the purification chamber of the device of the present invention.

[0024] Figure 4 It is a schematic diagram of the connection structure between the driving assembly of the device of the present invention and the purification chamber.

[0025] Figure 5 It is a schematic diagram of the semi-sectional structure of the filter bin of the device of the present invention.

[0026] Figure 6 It is a schematic diagram of the internal cross-sectional structure of the purification chamber of the device of the present invention.

[0027] Figure 7 It is a partial schematic diagram of the sleeve and conveying pipe structure of the device of the present invention.

[0028] Figure 8 It is a schematic diagram of the connection structure between the annular sealing plate and the cabinet door of the device of the present invention.

[0029] Fig. 9 The device of the present invention Figure 2 A partial enlarged schematic diagram in the middle.

[0030] Fig.10 The device of the present invention Figure 6 A partial enlarged schematic diagram of point B in the middle.

[0031] In the figure: 1, placement seat; 2, support plate; 3, recovery tank; 31, air inlet pipe; 32, air outlet pipe; 33, cabinet door; 331, sliding groove; 4, driving assembly; 41, driving motor; 42, rotating shaft; 43, arc bevel gear; 44, bevel gear; 45, sleeve; 451, reciprocating groove; 46, conveying pipe; 461, clamping block; 462, limiting rod; 47, ventilation pipe; 5, purification chamber; 51, clamping cylinder; 6, filling assembly; 61, liquid storage tank; 611, water injection port; 612, cross fixing frame; 62 , circular support plate; 63, air pump; 64, air supply pipe; 65, sealing plate; 66, liquid inlet pipe; 67, pressure relief valve; 7, separation component; 71, air compressor; 72, air inlet pipe; 73, refrigeration equipment; 74, isolation chamber; 741, vent; 75, separation chamber; 76, first collecting pipe; 8, transfer tank; 81, second collecting pipe; 9, filter component; 91, filter chamber; 92, spherical rod; 93, frame; 94, annular sealing plate; 941, fixed block; 942, rotating plate; 943, spring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0033] See also Figures 1 to 10 , which is the first embodiment of the present invention, provides a technical solution: a multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas, comprising a placement seat 1, and a support plate 2 arranged on one side of the placement seat 1, the support plate 2 is used to support the recovery tank 3, so that the recovery tank 3 can recover and purify the gas, the support plate 2 is provided with a recovery tank 3, the recovery tank 3 is used to perform multiple filtering and impurity removal treatments on the recovered gas, and a driving component 4 is arranged inside the recovery tank 3, and a purification chamber 5 is arranged inside the recovery tank 3, the purification chamber 5 is used to mix the incoming gas with water for initial purification treatment, and remove water-soluble impurities and toxic gases such as SO2, HF, CO2, etc. in the gas;

[0034] The driving assembly 4 includes a driving motor 41 arranged on one side of the placement seat 1, and the driving motor 41 is used to provide power to drive the rotating shaft 42 to rotate. The rotating shaft 42 is arranged on one side of the driving motor 41, and the rotating shaft 42 is used to rotate so that the arc-shaped bevel gear 43 can drive the bevel gear 44 to change the rotation angle. The arc-shaped bevel gear 43 arranged on the end of the rotating shaft 42 away from the driving motor 41 is engaged with the bevel gear 44 arranged on the arc-shaped bevel gear 43, and penetrates the sleeve 45 arranged on the bevel gear 44. The sleeve 45 is used to rotate synchronously with the rotation of the bevel gear 44, and a reciprocating groove 451 is opened inside the sleeve 45. It also includes a conveying pipe 46 movably arranged inside the sleeve 45. The conveying pipe 46 is used to be lifted and lowered under the drive of the sleeve 45. During the lifting process, the conveyed gas collides with the water inside the purification chamber 5, so that the gas is fully dispersed, and the gas can be more fully purified. The array is arranged on the conveying pipe 46 away from the sleeve 45. The end of the ventilation pipe 47 is arranged.

[0035] A locking block 461 is provided at one end of the delivery tube 46 close to the sleeve 45. The locking block 461 is used to lock and slide with the reciprocating groove 451. When the sleeve 45 rotates, the delivery tube 46 can be driven to reciprocate and rise and fall through the locking block 461. A limiting rod 462 is provided at one end of the delivery tube 46 away from the locking block 461. One end of the limiting rod 462 is a square port, which is used to prevent rotation during the cooperation with the locking cylinder 51.

[0036] The recovery tank 3 is provided with an air inlet pipe 31 for transporting gas. An air outlet pipe 32 is provided on one side of the recovery tank 3 for transporting the gas that has undergone initial purification to the interior of the separation component 7 to separate and recover the two gases sulfur hexafluoride and perfluoroisobutyronitrile. A cabinet door 33 is provided on one side of the recovery tank 3. A locking cylinder 51 is provided inside the purification chamber 5. The locking cylinder 51 is a square cavity with a round outer surface and a square inner surface, which is used to cooperate with the limiting rod 462.

[0037] A filling component 6 is provided on the placement seat 1, and the filling component 6 is used to squeeze the water inside the liquid storage tank 61 into the purification chamber 5 to facilitate the purification of the gas. A separation component 7 is provided at the end of the outlet pipe 32 away from the recovery tank 3, and the separation component 7 is used to separate the two gases. The separation component 7 separates the two gases by low-temperature liquefaction, so that a single purified gas can be obtained in the end. A filter component 9 is provided outside the purification chamber 5, and the filter component 9 is used to perform secondary purification treatment on the gas.

[0038] During use, the filling assembly 6 is first started to inject liquid into the purification chamber 5. Then, when the air inlet pipe 31 is delivering air, the driving motor 41 is started to drive the arc-shaped bevel gear 43 on the rotating shaft 42 to rotate. The rotation of the arc-shaped bevel gear 43 drives the bevel gear 44 to rotate synchronously, and the rotation angle is changed by 90 degrees. The rotation of the bevel gear 44 can make the sleeve 45 to which it is fixed to rotate synchronously. Under the action of the reciprocating groove 451 inside the sleeve 45 and the engaging block 461 provided on the delivery pipe 46, the delivery pipe 46 can be reciprocated and lifted. The gas delivered can collide with the water inside the purification chamber 5, breaking up the gas to form small bubbles, thereby increasing the contact area between the gas and the water, so that the toxic gas soluble in water inside the gas can be fully dissolved in the water. The gas will pass through the small holes opened on the purification chamber 5 to reach the filter component 9 for secondary purification treatment, filtering out some of the remaining gas inside and the water vapor brought out, thereby realizing multi-stage purification of sulfur hexafluoride and perfluoroisobutyronitrile gases, and then enter the separation component 7 through the outlet pipe 32 for separation, completing the entire recovery process. Example 2

[0039] See also Figures 1 to 10 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that:

[0040] The filling assembly 6 includes a liquid storage tank 61 arranged on the placement seat 1, and the liquid storage tank 61 is used to temporarily store pure water, so that part of the water can be squeezed into the purification chamber 5 when in use. A circular support plate 62 is arranged on the side of the liquid storage tank 61 away from the placement seat 1. The circular support plate 62 is used to support and fix the air pump 63 and the liquid inlet pipe 66 to avoid shaking during use. The air pump 63 is arranged on the side of the circular support plate 62 away from the liquid storage tank 61. The air pump 63 is used to start filling air into the liquid storage tank 61, an air supply pipe 64 is arranged on one side of the air pump 63, and the air supply pipe 64 passes through the top of the liquid storage tank 61, and also includes a sealing plate 65 movably arranged inside the liquid storage tank 61, the sealing plate 65 is used to prevent the excess water from entering the air pump 63 through the air supply pipe 64 when the water source inside the liquid storage tank 61 is replaced due to the inability to observe the water amount inside the liquid storage tank 61, so as to damage the air pump 63, and a liquid inlet pipe 66 is arranged inside the liquid storage tank 61, and the liquid inlet pipe 66 is used to transport the water inside the liquid storage tank 61 to the inside of the purification chamber 5.

[0041] A water inlet 611 is provided on one side of the liquid storage tank 61. The water inlet 611 is used to facilitate the replacement of water inside the liquid storage tank 61 to maintain the purity of the water source. A cross fixing frame 612 is provided inside the liquid storage tank 61. The cross fixing frame 612 is used to prevent the sealing plate 65 from dropping too much and squeezing excessive water into the purification chamber 5. A pressure relief valve 67 is provided on one side of the liquid storage tank 61 close to the circular support plate 62. The pressure relief valve 67 is used to be opened after the entire purification process is completed to allow water to flow back into the liquid storage tank 61, thereby facilitating the subsequent replacement of water.

[0042] The filter assembly 9 includes a filter bin 91 movably arranged outside the purification bin 5, a spherical rod 92 arranged in an array on the filter bin 91, and the spherical rod 92 is slidably engaged with the recovery tank 3, and the spherical rod 92 is used to be fixedly connected to the inner wall of the recovery tank 3 to prevent the filter bin 91 from sliding. It also includes a frame 93 arranged inside the filter bin 91, and through holes are opened on both sides of the frame 93 to facilitate the passage of gas, and an activated carbon plate is placed in the interlayer between the frame 93 and the filter bin 91 to perform secondary filtration on the gas that has been initially purified, and adsorb and filter the impurity gas that is insoluble in water inside. An annular sealing plate 94 is movably arranged inside the filter bin 91, and the annular sealing plate 94 is used to seal the filter bin 91 to form a closed space. At the same time, it is convenient to replace the activated carbon plate placed inside after opening.

[0043] A fixing block 941 is provided on the side of the annular sealing plate 94 close to the cabinet door 33. The fixing block 941 is a U-shaped notch, which is used to limit the rotation of the rotating plate 942 to prevent the annular sealing plate 94 from being unable to move when the cabinet door 33 is closed, and a rotating plate 942 is movably provided on the side of the fixing block 941 away from the annular sealing plate 94. The rotating plate 942 is used to move the annular sealing plate 94 driven by the cabinet door 33, so that the staff can replace the activated carbon plate placed inside in time after the movement. A spring 943 is arranged in an array on one side of the annular sealing plate 94, and the spring 943 is fixedly connected to the inner wall of the filter bin 91 away from the annular sealing plate 94. The spring 943 is used to have a rebound force to facilitate the closing of the annular sealing plate 94 when the cabinet door 33 is closed. A sliding groove 331 is provided on the side of the cabinet door 33 close to the annular sealing plate 94, and the sliding groove 331 is engaged and slid with the rotating plate 942.

[0044] During use, when it is necessary to purify the gas, first start the air pump 63 on the liquid storage tank 61 to deliver gas to the inside of the liquid storage tank 61. A one-way valve is provided on the air delivery pipe 64 arranged on one side of the air pump 63 to prevent the gas inside the liquid storage tank 61 from flowing back during the air delivery process. At the same time, a sealing plate 65 is provided inside the liquid storage tank 61 to divide the internal space of the liquid storage tank 61 into two areas. When the gas inside the liquid storage tank 61 continues to increase, the sealing plate 65 will squeeze the water inside to reach the inside of the purification chamber 5 through the liquid inlet pipe 66, so that the water inside the purification chamber 5 reaches a higher height. At the same time, during the descent of the sealing plate 65, the liquid storage tank 61 is provided with a sealing plate 65. The cross fixing frame 612 can prevent the sealing plate 65 from falling too much. After completing the process of delivering water to the inside of the purification chamber 5, the gas can be purified. After the gas is purified and filtered by the water, it will reach the frame 93 set inside the filter chamber 91 through the small holes on the purification chamber 5. The gas is drained from bottom to top through the frame 93, so that the gas can pass through the entire activated carbon plate placed in the gap between the frame 93 and the filter chamber 91 to fully filter the gas, filter and adsorb other untreated impurity gases remaining in the gas, and also adsorb a small amount of water vapor carried in the gas, making the gas dry, which is convenient for subsequent separation.

[0045] The remaining structures are the same as those of Example 1. Example 3

[0046] See also Figures 1 to 10 , which is the third embodiment of the present invention. This embodiment is different from the first and second embodiments in that:

[0047] The separation component 7 includes an air compressor 71 arranged on the placement seat 1, an air flow inlet pipe 72 arranged on one side of the air compressor 71, and a refrigeration device 73 arranged at the other end of the air flow inlet pipe 72. The refrigeration device 73 adopts a vortex refrigerator, and a vortex tube in the core of the vortex refrigerator produces a strong rotating flow state, so that the refrigerant vortexes inside the vortex tube. This flow can produce a strong thermal effect, thereby absorbing the surrounding heat to achieve cooling. An isolation chamber 74 is arranged at the other end of the refrigeration device 73. The isolation chamber 74 is used to isolate the separation chamber 75 from the external environment to prevent the separation chamber 75 from being unable to reach a sufficiently low temperature environment, so as to protect the sulfur hexafluoride and the whole The fluoroisobutyronitrile gas is separated, and an air vent 741 is provided on the isolation chamber 74. The air vent 741 is used to prevent the cold air between the isolation chamber 74 and the separation chamber 75 from having no vent, resulting in a continuous increase in pressure. The separation chamber 75 is also provided inside the isolation chamber 74. The separation chamber 75 is used to condense and liquefy the perfluoroisobutyronitrile gas therein to form a liquid after the sulfur hexafluoride and perfluoroisobutyronitrile gases enter, while the sulfur hexafluoride remains in a gaseous state and flows out of the separation chamber 75 from the first collecting tube 76, passing through the first collecting tube 76 provided on one side of the separation chamber 75. The first collecting tube 76 is used to collect the unliquefied sulfur hexafluoride gas and send it to a special collection tank.

[0048] The placement seat 1 is located at the bottom of the separation chamber 75 and is provided with a transfer tank 8, and a one-way pipe channel is installed between the transfer tank 8 and the separation chamber 75 to prevent the vaporized perfluoroisobutyronitrile from returning to the separation chamber 75. The transfer tank 8 is used to collect the liquefied perfluoroisobutyronitrile in the separation chamber 75, and the perfluoroisobutyronitrile is vaporized under the action of the external temperature so that it can be collected through the second collection tube 81. The transfer tank 8 is provided with a second collection tube 81.

[0049] During use, after the multi-stage purification of the gas is completed, the gas will enter the separation chamber 75 through the gas outlet pipe 32. At this time, the air compressor 71 is started to allow the air flow to reach the refrigeration device 73 through the air flow inlet pipe 72. The refrigeration device 73 refrigerates the gap between the isolation chamber 74 and the separation chamber 75, thereby reducing the temperature of the entire separation chamber 75, so that the two gases entering the separation chamber 75 are separated under the condition that their own boiling points are different. Among them, the boiling point of perfluoroisobutyronitrile gas is higher, and it will condense into liquid first. After the perfluoroisobutyronitrile gas becomes liquid It will flow to the transfer tank 8, wherein a one-way valve is also installed on the interconnecting pipe between the separation chamber 75 and the transfer tank 8 to prevent the perfluoroisobutyronitrile gas from entering the separation chamber 75 through the pipe after it is converted into gas. The perfluoroisobutyronitrile liquid in the transfer tank 8 will gradually increase its own temperature with the external temperature, thereby turning back into gas, and finally flowing from the second collecting pipe 81 to a special collecting tank, while sulfur hexafluoride will directly flow out of the separation chamber 75 through the first collecting pipe 76 and enter a special collecting tank, thereby completing the separation and collection of the two gases, making it convenient for subsequent staff to use the two gases.

[0050] The remaining structures are the same as those of embodiments 1 and 2.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas, comprising a placement seat (1) and a support plate (2) arranged on one side of the placement seat (1), characterized in that: The support plate (2) is provided with a recovery tank (3), and a driving component (4) is provided inside the recovery tank (3); a cabinet door (33) is provided on one side of the recovery tank (3); a purification chamber (5) is provided inside the recovery tank (3); the purification chamber (5) is used to cooperate with the driving component (4) to disperse the gas entering the chamber to form small bubbles, thereby increasing the contact area between the gas and water; a filling component (6) is provided on the placement seat (1); an air outlet pipe (32) is provided through one side of the recovery tank (3); a separation component (7) is provided at one end of the air outlet pipe (32) away from the recovery tank (3); and the separation component (7) is used to separate the two gases; a filter component (9) is provided outside the purification chamber (5); and the filter component (9) is used to perform secondary purification on the gas; The driving assembly (4) comprises a driving motor (41) arranged at one side of the placement seat (1), a rotating shaft (42) arranged at one side of the driving motor (41), an arc-shaped bevel gear (43) arranged at one end of the rotating shaft (42) away from the driving motor (41), a bevel gear (44) meshing with the arc-shaped bevel gear (43), a sleeve (45) penetrating the bevel gear (44), and a reciprocating groove (451) is provided inside the sleeve (45), and also comprises a delivery pipe (46) movably arranged inside the sleeve (45), a clamping block (461) is provided at one end of the delivery pipe (46) close to the sleeve (45), the clamping block (461) is used to clamp and slide with the reciprocating groove (451), and the delivery pipe (46) can be driven to reciprocate and rise and fall by the clamping block (461) when the sleeve (45) rotates, and a ventilation pipe (47) is arranged in an array at one end of the delivery pipe (46) away from the sleeve (45); The filter assembly (9) comprises a filter chamber (91) movably arranged outside the purification chamber (5), spherical rods (92) arranged in an array on the filter chamber (91), and the spherical rods (92) are slidably engaged with the recovery tank (3), and also comprises a frame (93) arranged inside the filter chamber (91), and an annular sealing plate (94) movably arranged inside the filter chamber (91), a fixed block (941) being arranged on a side of the annular sealing plate (94) close to the cabinet door (33), and a rotating plate (942) being movably arranged on a side of the fixed block (941) away from the annular sealing plate (94), a spring (943) being arranged in an array on one side of the annular sealing plate (94), and a side of the spring (943) away from the annular sealing plate (94) is fixedly connected to the inner wall of the filter chamber (91), and a sliding groove (331) is provided on a side of the cabinet door (33) close to the annular sealing plate (94), and the sliding groove (331) and the rotating plate (942) are engaged and slidably engaged.

2. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas according to claim 1, characterized in that: A limiting rod (462) is provided at one end of the delivery tube (46) away from the locking block (461).

3. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas according to claim 2, characterized in that: The recovery tank (3) is provided with an air inlet pipe (31), and the purification chamber (5) is provided with a locking cylinder (51) inside.

4. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas according to claim 2, characterized in that: The filling assembly (6) comprises a liquid storage tank (61) arranged on a placement seat (1), a circular support plate (62) arranged on a side of the liquid storage tank (61) away from the placement seat (1), an air pump (63) arranged on a side of the circular support plate (62) away from the liquid storage tank (61), an air supply pipe (64) arranged on one side of the air pump (63), and the air supply pipe (64) passes through the top of the liquid storage tank (61), and also comprises a sealing plate (65) movably arranged inside the liquid storage tank (61), and a liquid inlet pipe (66) arranged inside the liquid storage tank (61).

5. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas according to claim 4, characterized in that: A water injection port (611) is provided through one side of the liquid storage tank (61), and a cross fixing frame (612) is provided inside the liquid storage tank (61). A pressure relief valve (67) is provided on one side of the liquid storage tank (61) close to the circular support plate (62).

6. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas according to claim 2, characterized in that: The separation assembly (7) comprises an air compressor (71) arranged on a placement seat (1), an air flow inlet pipe (72) arranged on one side of the air compressor (71), a refrigeration device (73) arranged at the other end of the air flow inlet pipe (72), an isolation chamber (74) arranged at the other end of the refrigeration device (73), and a vent hole (741) is provided on the isolation chamber (74). The separation chamber (75) is also arranged inside the isolation chamber (74), and a first collection pipe (76) is provided on one side of the separation chamber (75).

7. A multi-stage purification device for recovering sulfur hexafluoride and perfluoroisobutyronitrile gas according to claim 6, characterized in that: The placement seat (1) is provided with a transfer tank (8) at the bottom of the separation bin (75), and a one-way pipeline channel is installed between the transfer tank (8) and the separation bin (75), and a second collection pipe (81) is provided on the transfer tank (8).

Images