Catalyst rapid drying device and method thereof

Abstract

The present application relates to a catalyst rapid drying device and method thereof, and belongs to the field of drying technology. It comprises a box body, a material conveying assembly, a feeding assembly, a discharging assembly and a protective gas circulation system. The material conveying assembly is arranged inside the box body, and a plurality of heating rods arranged at intervals along the material conveying direction are provided inside the box body. The feeding assembly and the discharging assembly are respectively arranged at both ends of the box body, and are respectively arranged correspondingly to the upper and lower ends of the material conveying assembly. The protective gas circulation system comprises an intake end block and an exhaust end block arranged inside the box body, and a condensing box and an air pump are connected in series between the intake end block and the exhaust end block, and the condensing box and the air pump are arranged outside the box body. In the process of drying the catalyst, the present application uses inert gas as a protective gas to protect it throughout the process, thereby preventing it from contacting with oxygen in a high-temperature environment, and solving the problems of sintering, aggregation and loss of activity during the drying process.

Description

Technical Field

[0001] The present application belongs to the field of drying technology, and specifically relates to a catalyst rapid drying device and method thereof. Background Art

[0002] After production, catalysts need to be dried to eliminate moisture interference. This prevents moisture from occupying active sites on the catalyst surface, reducing reaction efficiency and altering chemical properties. Drying also increases catalyst stability, making it easier to transport and store.

[0003] The existing catalyst drying method is mainly hot air drying. Under this drying method, the catalyst will come into contact with the oxygen in the hot air, and it is easy to sinter and oxidize in a high temperature environment, which reduces its activity and affects the subsequent use effect. Summary of the Invention

[0004] The technical problem to be solved by this application is: to overcome the shortcomings of the existing technology and provide a catalyst rapid drying device and method. During the process of drying the catalyst, this application uses inert gas as a protective gas to protect it throughout the process, avoiding its contact with oxygen in a high-temperature environment, and solving the problems of sintering, aggregation and loss of activity during the drying process.

[0005] The technical solution adopted by this application to solve the problems existing in the prior art is:

[0006] A catalyst rapid drying device comprises a box body, a material conveying assembly, a feeding assembly, a discharging assembly and a protective gas circulation system.

[0007] The material conveying assembly is arranged inside the box body, and a plurality of heating rods are arranged at intervals along the material conveying direction inside the box body.

[0008] The feeding assembly and the discharging assembly are respectively arranged at the two ends of the box body, and are arranged correspondingly to the two ends of the material conveying assembly.

[0009] The feeding assembly includes a feeding box, an intermediate box and an end box which are connected in sequence from top to bottom. A sealing assembly is provided at the through connection between the feeding box and the intermediate box, and between the intermediate box and the end box. A built-in exhaust pipe is provided inside the intermediate box, and the built-in exhaust pipe is connected to the external vacuum pipeline.

[0010] The discharge assembly includes a receiving box, an intermediate box and a discharge box that are connected in sequence from top to bottom. A sealing assembly is provided at the through connections between the receiving box and the intermediate box, and between the intermediate box and the discharge box. A built-in exhaust pipe is provided inside the intermediate box, and the built-in exhaust pipe is connected to an external vacuum pipeline.

[0011] The protective gas circulation system includes an air intake end block and an air exhaust end block arranged inside the box body. A condensation box and an air pump are connected in series between the air intake end block and the air exhaust end block. The condensation box and the air pump are arranged outside the box body.

[0012] Preferably, the material conveying assembly includes a support frame, on which a plurality of rollers are rotatably connected, and a conveyor belt is commonly sleeved on the rollers, wherein the roller at one end is coaxially connected to the output shaft of the drive motor.

[0013] Both ends of the upper conveyor belt are provided with anti-slip frames fixedly connected to the support frame. The top surface of the upper conveyor belt is provided with several triangular bars at intervals along its moving direction, and both ends of the triangular bars are fixedly connected to the anti-slip frames respectively.

[0014] Preferably, both ends of the heating rod are inserted into the sockets of the mounting slider, and the mounting slider is detachably connected to the support frame.

[0015] Preferably, in the feed assembly, a connecting sleeve is provided between the feed box and the intermediate box, and between the intermediate box and the terminal box.

[0016] In the discharge assembly, a connecting sleeve is provided between the receiving box and the intermediate box, and between the intermediate box and the discharge box.

[0017] Preferably, the sealing assembly includes a sealing plate and two telescopic devices, with frames at both ends of the sealing plate, a rotating shaft socket at one end of the frame and an extended slide groove at the other end, a first slider sliding inside the extended slide groove, an end head rotatably connected above the first slider, and the end head is fixedly connected to the end of the telescopic rod of the telescopic device.

[0018] A sealing assembly is provided at the port of the first discharge channel at the bottom of the feed box. The telescopic device is fixedly connected to the outer wall of the feed box. The shaft socket is rotatably connected to the feed box through the shaft. When the telescopic rod of the telescopic device retracts and the sealing plate is in a horizontal state, the sealing plate seals the port of the first discharge channel.

[0019] A sealing assembly is provided at the port of the second unloading channel at the bottom of the intermediate box. The telescopic device is fixedly connected to the outer wall of the intermediate box. The shaft jack is rotatably connected to the intermediate box through the shaft. When the telescopic rod of the telescopic device retracts and the sealing plate is in a horizontal state, the sealing plate seals the port of the second unloading channel.

[0020] A sealing assembly is provided at the port of the fourth material discharge channel at the bottom of the material receiving box. The telescopic device is fixedly connected to the outer wall of the material receiving box. The shaft jack is rotatably connected to the material receiving box through the shaft. When the telescopic rod of the telescopic device retracts and the sealing plate is in a horizontal state, the sealing plate seals the port of the fourth material discharge channel.

[0021] Preferably, the telescopic device adopts a pneumatic telescopic cylinder with two upper and lower control air joints.

[0022] Preferably, the feeding assembly and the discharging assembly are externally connected to an air circuit control assembly, which includes a sub-control device and an external high-pressure air pipe, a telescopic rod contraction control air pipe, a telescopic rod extension control air pipe, a vacuum tube and a connecting pipe that are connected to the sub-control device.

[0023] The external high-pressure gas pipe is connected to the external high-pressure gas supply equipment, and the vacuum tube is connected to the external vacuum pumping equipment.

[0024] The telescopic rod contraction control air pipe is connected to the joints of the two telescopic devices through the two first branch pipes.

[0025] The telescopic rod extension control air pipe is connected to the joints of the two telescopic devices through two second branch pipes.

[0026] The connecting pipe is connected with the built-in exhaust pipe.

[0027] Preferably, the sub-control device includes a valve body and a cover plate that are detachably connected.

[0028] The valve body is provided with an air intake chamber connected to an external high-pressure air pipe. The air intake chamber is connected to the extension control air chamber and the contraction control air chamber arranged at intervals. The extension control air chamber is connected to two first air chambers, and the first chamber is connected to the extension control air pipe of the telescopic rod. The contraction control air chamber is connected to two second chambers, and the second chamber is connected to the contraction control air pipe of the telescopic rod.

[0029] A continuous vacuum air cavity is provided inside the valve body, and both ends of the vacuum air cavity are respectively connected to the vacuum tube and the connecting tube.

[0030] The valve body is provided with four valve stem movable holes, and the planes where the axes of the valve stem movable holes are located are perpendicular to the planes where the axes of the first air cavity, the second air cavity and the vacuum air cavity are located.

[0031] The two valve stem movable holes are connected to the two first air cavities through-and-through, and the other two valve stem movable holes are connected to the two second air cavities and the vacuum air cavity through-and-through.

[0032] A telescopic rod extension control valve column is provided inside the valve stem movable hole connected to the first air cavity, and a first through hole matched with the first air cavity is provided on the first cylinder of the telescopic rod extension control valve column.

[0033] A telescopic rod retraction control valve column is provided inside the valve stem movable hole connected to the second air cavity, and a second through hole connected to the second air cavity and a third through hole connected to the vacuum air cavity are provided on the second cylinder of the telescopic rod retraction control valve column.

[0034] A control assembly for controlling the extension of the telescopic rod and the sliding of the control valve column and the retraction of the telescopic rod is provided on the outside of the cover plate.

[0035] Preferably, the suction end block is connected to the condensation box through an suction pipe, and a first three-way valve and a second three-way valve are connected in series on the suction pipe. The second three-way valve is close to the condensation box, and the port of the first three-way valve not connected to the suction pipe is provided with an exhaust pipe, and the port of the second three-way valve not connected to the suction pipe is provided with a protective gas replenishment pipe.

[0036] A catalyst drying method, according to the above-mentioned catalyst rapid drying device, comprises the following steps:

[0037] S01. The granular catalyst enters the conveyor belt of the material conveying assembly inside the box through the feeding assembly. During the feeding process, the switch status of the sealing assembly of the feeding box and the sealing assembly of the intermediate box are as follows:

[0038] The sealing assembly of the middle box is closed, the sealing assembly of the feed box is opened, the catalyst enters the middle box through the feed box, and then the sealing assembly of the feed box is closed. The built-in vacuum pipe vacuums the middle box, and then the sealing assembly of the middle box is opened. The catalyst falls from the middle box to the end box, and then is continuously fed to the conveyor belt through the end box.

[0039] S02. The granular catalyst is transported from one end of the feed assembly to one end of the discharge assembly by a conveyor belt. During the transportation, it is heated and dried by the heating rod. The temperature of the heating rod gradually increases from one end of the feed assembly to one end of the discharge assembly.

[0040] S03. Catalyst particles are discharged through the discharge assembly. During the discharge process, the switch status of the sealing assembly of the receiving box and the sealing assembly of the intermediate box are as follows:

[0041] The sealing assembly of the intermediate box is closed, the sealing assembly of the receiving box is opened, the catalyst enters the intermediate box through the receiving box, then the sealing assembly of the receiving box is closed, the sealing assembly of the intermediate box is opened, the catalyst falls from the intermediate box into the discharge box, and then discharged through the discharge port on the discharge box, and then the sealing assembly of the intermediate box is closed.

[0042] After the intermediate box is vacuumed by the built-in vacuum pipe, the sealing assembly of the material receiving box is opened.

[0043] S04. During the catalyst drying process, the air pump is turned on to control the air pressure and the gas flow rate inside the box. The gas inside the box is extracted through the suction end block and pumped into the condensation box. The gas evaporated from the catalyst is liquefied inside the condensation box, and the dry protective gas flows back to the inside of the box through the exhaust end block.

[0044] Compared with the prior art, this application has the following beneficial effects:

[0045] (1) During the drying process of the catalyst, the inside of the box is filled with protective gas. Combined with the vacuuming of the intermediate box during the feeding and discharging process of the feeding and discharging assembly, it can be ensured that the catalyst will not come into contact with air during the drying process, ensuring the activity of the catalyst after drying and avoiding sintering and aggregation.

[0046] (2) By setting different temperatures of the heating rod, a temperature field with gradually increasing temperature is formed inside the box along the direction of the catalyst movement, which can gradually heat and dry the catalyst, avoiding the catalyst from rising too fast after entering the box, resulting in a large temperature difference between the inside and outside of the catalyst, causing the catalyst particles to crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present application is further described below with reference to the accompanying drawings and examples.

[0048] Figure 1 This is a structural diagram of a catalyst rapid drying device for this application.

[0049] Figure 2 This is a front view of a catalyst rapid drying device for this application.

[0050] Figure 3 This is a partial cross-sectional view of a catalyst rapid drying device box in this application.

[0051] Figure 4 This is a structural diagram of a catalyst rapid drying device after removing the box body.

[0052] Figure 5 This is a structural diagram of a catalyst rapid drying device after removing the box and protective gas circulation system.

[0053] Figure 6 This is a structural diagram of a material conveying assembly in a catalyst rapid drying device of this application.

[0054] Figure 7 This is a structural diagram of a heating device in a catalyst rapid drying device of this application.

[0055] Figure 8 This is an exploded view of a heating device in a catalyst rapid drying device of this application.

[0056] Figure 9 This is a structural diagram of a feed assembly in a catalyst rapid drying device for this application.

[0057] Figure 10 This is a diagram showing the total composition of feed in a catalyst rapid drying device for this application.

[0058] Figure 11 This is a partial cross-sectional view of a feed assembly in a catalyst rapid drying device of this application.

[0059] Figure 12 This is a structural diagram of the intermediate box in a catalyst rapid drying device of this application.

[0060] Figure 13 This is a cross-sectional view of an intermediate box in a catalyst rapid drying device of this application.

[0061] Figure 14 This is a structural diagram of a sealing assembly in a catalyst rapid drying device of this application.

[0062] Figure 15 This is a cross-sectional view of a sealing assembly in a catalyst rapid drying device of this application.

[0063] Figure 16 This is a structural diagram of the gas path control assembly in a catalyst rapid drying device for this application.

[0064] Figure 17 This is a structural diagram of a sub-control device in a catalyst rapid drying device of this application.

[0065] Figure 18 This is an exploded view of the sub-control device in a catalyst rapid drying device of this application.

[0066] Figure 19 This is the first cross-sectional view of a sub-control device in a catalyst rapid drying device of the present application.

[0067] Figure 20 This is the second cross-sectional view of a sub-control device in a catalyst rapid drying device of this application.

[0068] Figure 21 This is the third cross-sectional view of a sub-control device in a catalyst rapid drying device of this application.

[0069] Figure 22 This is a diagram showing the structure of a telescopic rod extension control valve column in a catalyst rapid drying device of this application.

[0070] Figure 23 for Figure 22 A cross-sectional view of

[0071] Figure 24 This is a structural diagram of a telescopic rod retraction control valve column in a catalyst rapid drying device of this application.

[0072] Figure 25 for Figure 24 Cross-sectional view,

[0073] Figure 26 This is the first structural diagram of the discharge assembly in a catalyst rapid drying device of this application.

[0074] Figure 27This is the second structural diagram of the discharge assembly in a catalyst rapid drying device of this application.

[0075] Figure 28 This is a partial cross-sectional view of a discharge assembly in a catalyst rapid drying device of this application.

[0076] Figure 29 This is a structural diagram of a protective gas circulation system in a catalyst rapid drying device of this application.

[0077] Figure 30 This is the first cross-sectional view of a condensation box in a catalyst rapid drying device of the present application.

[0078] Figure 31 This is the second cross-sectional view of a condensation box in a catalyst rapid drying device of the present application.

[0079] In the figure: 1-Material conveying assembly, 101-Support frame, 102-Roller, 103-Drive motor, 104-Anti-slip frame, 105-Conveyor belt, 106-Triangular bar, 107-Heating rod, 108-Mounting slider, 2-Feed box, 201-Feed channel, 202-First unloading channel, 3-Adsorption cover, 301-Suction pipe, 4-Middle box, 401-Second unloading channel, 5-End box, 501-Third unloading channel, 6-Connecting sleeve, 7-Seal assembly, 701-Seal plate, 702-Frame, 703-Shaft jack, 7 04-Extension slide, 705-Telescopic device, 706-End, 707-First slider, 8-Sub-control device, 801-Valve body, 802-Cover, 803-Inlet cavity, 804-Extension control cavity, 805-Contraction control cavity, 806-First branch cavity, 807-First pressure relief cavity, 808-First pressure relief hole, 809-Second branch cavity, 8010-Second pressure relief cavity, 8011-Second pressure relief hole, 8012-Valve stem movable hole, 8013-Vacuum cavity, 9-Telescopic rod extension control valve column, 901-First cylinder, 9 02-first control rod, 903-first clamping ball head, 904-first through hole, 905-first L-shaped hole, 10-telescopic rod retraction control valve column, 1001-second cylinder, 1002-second control rod, 1003-second clamping ball head, 1004-second through hole, 1005-second L-shaped hole, 1006-third through hole, 11-lever, 1101-waist-shaped hole, 12-servo motor, 13-external high-pressure air pipe, 14-telescopic rod contraction control air pipe, 1401-first branch pipe, 15-telescopic rod extension control air pipe, 1501 -Second branch pipe, 16-vacuum tube, 17-connecting pipe, 18-built-in exhaust pipe, 19-material receiving box, 1901-material receiving port, 1902-fourth unloading channel, 20-discharge box, 2001-discharge port, 21-suction end block, 22-suction pipe, 23-condensation box, 2301-heat dissipation fin, 2302-baffle, 2303-drainage trough, 24-air pump, 25-exhaust pipe, 26-exhaust end block, 27-drainage pipe, 28-first three-way valve, 29-second three-way valve, 30-exhaust pipe, 31-protective gas supply pipe, 32-box body. DETAILED DESCRIPTION

[0080] The catalyst rapid drying device and method of the present application are further described in detail with reference to the accompanying drawings, but are not intended to limit the present application.

[0081] Depend on Figures 1 to 31 As shown, a catalyst rapid drying device includes a housing 32, a material conveying assembly 1, a feed assembly, a discharge assembly, and a protective gas circulation system. The housing 32 includes two parts, upper and lower, which are detachably connected by bolts, and a sealing gasket is provided at the abutment between the two parts.

[0082] The material conveying assembly 1 is arranged inside the box 32. Figure 6 As shown, the material conveyor assembly 1 includes a support frame 101, to which are rotatably connected a plurality of rollers 102. The axes of the rollers 102 are located in the same horizontal plane, and an endless conveyor belt 105 is sleeved on the rollers 102. One end of the roller 102 is coaxially connected to the output shaft of a drive motor 103. The drive motor 103 is disposed outside the housing 32 and fixedly connected to the outer wall of the housing 32.

[0083] The two ends of upper conveyor belt 105 are provided with anti-falling frame 104 that is fixedly connected with support frame 101, and the top surface of upper conveyor belt 105 is spaced with several triangular bars 106 along its moving direction, and triangular bar 106 two ends are fixedly connected with anti-falling frame 104 respectively.Anti-falling frame 104 prevents catalyst particles from falling from both sides of conveyor belt 105 during movement, and the cross-sectional shape of triangular bar 106 is a right triangle, and the inclined-plane of triangular bar 106 moves towards the direction of catalyst particles.When catalyst particles move to the position of triangular bar 106, they will move upwards along the inclined-plane of triangular bar 106, move to the top and then fall.In the process that catalyst particles move up along triangular bar 106 inclined-planes and fall, catalyst particles will rotate, and then change the fitting surface with conveyor belt 105, optimize the drying effect of catalyst particles.

[0084] Inside the housing 32, several heating rods 107 are spaced apart along the material conveying direction. Furthermore, the ends of the heating rods 107 are inserted into the sockets of mounting sliders 108, which are detachably connected to the support frame 101. The heating rods 107 are positioned below the upper conveyor belt 105, which is provided with several ventilation holes to facilitate drying of the catalyst.

[0085] The feed assembly and discharge assembly are disposed at opposite ends of the housing 32, corresponding to the upper and lower ends of the material conveying assembly 1. In this embodiment, the temperature of the plurality of heating rods 107 gradually increases from one end of the feed assembly to the other end of the discharge assembly. This creates a gradually increasing temperature field within the housing 32 along the direction of catalyst movement, gradually heating and drying the catalyst. This prevents the catalyst from heating too quickly after entering the housing 32, which could result in a significant temperature difference between the interior and exterior of the catalyst and cause cracking of the catalyst particles.

[0086] Depend on Figures 9 to 13 As shown, the feeding assembly includes a feeding box 2, an intermediate box 4 and an end box 5 which are sequentially connected from top to bottom. A sealing assembly 7 is provided at the through connection between the feeding box 2 and the intermediate box 4 and between the intermediate box 4 and the end box 5. A built-in exhaust pipe 18 is provided inside the intermediate box 4, and the built-in exhaust pipe 18 is connected to an external vacuum pipeline.

[0087] The first discharge channel 202 below the feed box 2 and the second discharge channel 401 below the intermediate box 4 both adopt a necked arrangement. In order to improve the sealing effect at the connection between the feed box 2, the intermediate box 4 and the end box 5, in this embodiment, a connecting sleeve 6 is provided between the feed box 2 and the intermediate box 4, and between the intermediate box 4 and the end box 5.

[0088] Feed channel 201 of feed box 2 is arranged at an angle, allowing the catalyst particles to slide into feed box 2 under their own gravity. A scraper is provided on feed channel 201, and the distance between the bottom of the scraper and the bottom surface of feed channel 201 is greater than the diameter of a single catalyst particle, but less than the sum of the diameters of two catalyst particles. This ensures that the catalyst particles in feed channel 201 are arranged in a single layer after passing through the scraper, without any overlap.

[0089] The top of the feed box 2 features a large opening, covered by a suction hood 3. This opening is connected to a suction pipe 301, the rear end of which is connected to an external exhaust system and a dust bag. As catalyst particles parabolically slide from the feed channel 201 into the feed box 2, the suction force of the suction hood 3 is adjusted to remove dust and broken particles from the catalyst particles through the suction pipe 301, effectively stripping and removing dust.

[0090] Depend on Figure 14 as well as Figure 15 As shown, the sealing assembly 7 comprises a sealing plate 701 and two telescopic devices 705. A frame 702 extends outward from each end of the sealing plate 701. One end of the frame 702 is provided with a rotating shaft socket 703, and the other end is provided with an extension slot 704. The end of the extension slot 704 protrudes from the sealing plate 701. A first slider 707 slides within the extension slot 704. A U-shaped end cap 706 is rotatably connected above the first slider 707. End cap 706 is fixedly connected to the end of the telescopic rod of the telescopic device 705.

[0091] A sealing assembly 7 is provided at the end of the first material discharge channel 202 at the bottom of the feed box 2. The telescopic device 705 is fixedly connected to the outer wall of the feed box 2. The shaft socket 703 is rotatably connected to the feed box 2 via a shaft. The telescopic rod of the telescopic device 705 retracts, pulling the sealing plate 701 upward to rotate around the shaft inside the shaft socket 703 until the sealing plate 701 is in a horizontal state and abuts against the bottom surface of the first material discharge channel 202. The sealing plate 701 seals the end of the first material discharge channel 202. When the first material discharge channel 202 needs to be opened, the telescopic rod of the telescopic device 705 is extended, pushing the sealing plate 701 to rotate downward around the shaft inside the shaft socket 703. During the rotation of the sealing plate 701, the first slider 707 slides along the extended slide groove 704 in the direction away from the shaft socket 703. At the same time, the end head 706 and the first slider 707 rotate to avoid interference.

[0092] A sealing assembly 7 is provided at the port of the second discharge channel 401 at the bottom of the intermediate box 4. The telescopic device 705 is fixedly connected to the outer wall of the intermediate box 4. The shaft socket 703 is rotatably connected to the intermediate box 4 through the shaft. When the telescopic rod of the telescopic device 705 retracts and the sealing plate 701 is in a horizontal state, the sealing plate 701 seals the port of the second discharge channel 401.

[0093] Sealing is performed by flipping the sealing plate 701. Compared with existing plug valves or ball valves, this sealing method can effectively reduce or even avoid squeezing and shearing of catalyst particles during the sealing process, and will not damage the integrity of the catalyst particles.

[0094] During the feeding process, the switch status of the sealing assembly 7 of the feeding box 2 and the sealing assembly 7 of the intermediate box 4 are as follows:

[0095] The sealing assembly 7 of the intermediate box 4 is closed, and the sealing assembly 7 of the feed box 2 is opened. The catalyst enters the intermediate box 4 through the feed box 2. The sealing assembly 7 of the feed box 2 is then closed, and the internal exhaust pipe 18 evacuates the intermediate box 4. The sealing assembly 7 of the intermediate box 4 is then opened, and the catalyst falls from the intermediate box 4 into the terminal box 5. The catalyst is then continuously fed to the conveyor belt 105 through the terminal box 5. A third discharge channel 501 with a constricted opening is provided below the terminal box 5 and is located directly above the conveyor belt 105.

[0096] The control method of each sealing assembly 7 during the feeding process not only prevents external air from entering the interior of the box body 32, but also ensures continuous feeding of the third feeding channel 501. Since the third feeding channel 501 is arranged with a narrow opening, the feeding can be completed under the premise that a portion of catalyst particles remains in the terminal box 5.

[0097] Only when the sealing plates 701 of both sealing assemblies 7 in the feed assembly are simultaneously horizontal does the internal exhaust pipe 18 begin to pump air out of the intermediate box 4, preventing outside air from entering the box body 32 when the intermediate box 4 is connected to the terminal box 5. To achieve this, in this embodiment, the telescopic device 705 utilizes a pneumatic telescopic cylinder with two upper and lower control air connectors. This is controlled in conjunction with the air circuit control assembly connected to the feed assembly.

[0098] Depend on Figures 16 to 25 As shown, the air circuit control assembly includes a sub-control device 8 and an external high-pressure air pipe 13 connected to the sub-control device 8, a telescopic rod contraction control air pipe 14, a telescopic rod extension control air pipe 15, a vacuum tube 16 and a connecting pipe 17.

[0099] The external high-pressure gas pipe 13 is connected to an external high-pressure gas supply device, and the vacuum pipe 16 is connected to an external vacuum pumping device.

[0100] The telescopic rod contraction control air pipe 14 is connected to the air inlet and outlet joints of the two telescopic devices 705 for controlling the contraction of the telescopic rod through the two first branch pipes 1401.

[0101] The telescopic rod extension control air pipe 15 is connected to the air inlet and outlet joints of the two telescopic devices 705 for controlling the extension of the telescopic rod through two second branch pipes 1501.

[0102] The connecting pipe 17 is connected to the built-in exhaust pipe 18 .

[0103] The sub-control device 8 includes a detachably connected valve body 801 and a cover plate 802, which are fixedly connected by bolts.

[0104] The valve body 801 is internally provided with an air intake chamber 803 connected to the external high-pressure air pipe 13. The air intake chamber 803 is interconnected with the spaced-apart extension control chamber 804 and the retraction control chamber 805. The extension control chamber 804 is interconnected with two first branch air chambers 806, which are interconnected with the telescopic rod extension control air pipe 15. The retraction control chamber 805 is interconnected with two second branch air chambers 809, which are interconnected with the telescopic rod retraction control air pipe 14.

[0105] The axes of the air inlet cavity 803 , the extension control cavity 804 , the contraction control cavity 805 , the first branch cavity 806 and the second branch cavity 809 are all located in the same plane.

[0106] A continuous vacuum air cavity 8013 is provided inside the valve body 801 , and both ends of the vacuum air cavity 8013 are connected to the vacuum tube 16 and the connecting tube 17 respectively.

[0107] The valve body 801 is provided with four valve stem movable holes 8012. The axes of the valve stem movable holes 8012 lie perpendicular to the planes of the axes of the first air chamber 806, the second air chamber 809, and the vacuum air chamber 8013. Two valve stem movable holes 8012 are connected to the two first air chambers 806, while the other two valve stem movable holes 8012 are connected to the two second air chambers 809 and the vacuum air chamber 8013.

[0108] A telescopic rod extension control valve column 9 is provided inside the valve stem movable hole 8012 connected to the first air cavity 806 , and a first through hole 904 cooperating with the first air cavity 806 is provided on the first cylinder 901 of the telescopic rod extension control valve column 9 .

[0109] A telescopic rod retraction control valve column 10 is provided inside the valve stem movable hole 8012 which is connected to the second air cavity 809. The second cylinder 1001 of the telescopic rod retraction control valve column 10 is provided with a second through hole 1004 which is connected to the second air cavity 809 and a third through hole 1006 which is connected to the vacuum air cavity 8013.

[0110] A control assembly for controlling the sliding of a control valve column 9 for controlling the extension of the telescopic rod and a control valve column 10 for controlling the retraction of the telescopic rod is provided on the outside of the cover plate 802 .

[0111] In this embodiment, the control assembly includes a lever 11 and a servo motor 12. The output shaft of the servo motor 12 is fixedly connected to the center of the lever 11, and the servo motor 12 controls the swing of the lever 11. A waist-shaped hole 1101 is provided on both sides of the output shaft of the servo motor 12 on the lever 11.

[0112] The telescopic rod extension control valve column 9 includes a first cylinder 901 and a first control rod 902 that are coaxially fixedly connected. The end of the first control rod 902 is passed through the outside of the cover plate 802. The end of the first control rod 902 is provided with two first clamping ball heads 903 arranged at intervals. The end of the first control rod 902 is passed through the waist-shaped hole 1101, and the two first clamping ball heads 903 clamp the lever 11 in the middle.

[0113] The telescopic rod retraction control valve column 10 includes a second cylinder 1001 and a second control rod 1002 that are coaxially fixedly connected. The end of the second control rod 1002 is passed through the outside of the cover plate 802. The end of the second control rod 1002 is provided with two second clamping ball heads 1003 arranged at intervals. The end of the second control rod 1002 is passed through the waist-shaped hole 1101, and the two second clamping ball heads 1003 clamp the lever 11 in the middle.

[0114] The ends of the first control rod 902 and the second control rod 1002 are respectively located in the waist-shaped holes 1101 on both sides of the lever 11. In this way, when the servo motor 12 drives the lever 11 to swing, it drives the first cylinder 901 and the second cylinder 1001 to move in opposite directions, thereby ensuring that the telescopic rod contraction control air pipe 14 and the telescopic rod extension control air pipe 15 are in two different states of intake and exhaust.

[0115] To relieve pressure during the movement of the telescopic rod of telescopic device 705, valve body 801 is internally provided with a first pressure relief chamber 807 and a second pressure relief chamber 8010. The ends of first pressure relief chamber 807 are connected to the two first branch air chambers 806, while the ends of second pressure relief chamber 8010 are connected to the two second branch air chambers 809. First pressure relief chamber 807 is connected to the exterior of valve body 801 via a first pressure relief hole 808, while second pressure relief chamber 8010 is connected to the exterior of valve body 801 via a second pressure relief hole 8011.

[0116] Correspondingly, a first L-shaped hole 905 is provided on the first cylindrical body 901 , and a second L-shaped hole 1005 is provided on the second cylindrical body 1001 .

[0117] When the telescopic rod of the telescopic device 705 is in the extended state, the first cylindrical body 901 is pressed down by the lever 11, and the second cylindrical body 1001 is lifted by the lever 11. At this time, the first through hole 904 is connected to the first branch air cavity 806, and the extension control air cavity 804 is connected to the telescopic rod extension control air pipe 15 through the first branch air cavity 806. The high-pressure air in the telescopic rod extension control air pipe 15 controls the extension of the telescopic rod of the telescopic device 705.

[0118] At this time, the two ends of the second L-shaped hole 1005 on the second cylinder 1001 are respectively connected to the telescopic rod contraction control air pipe 14 and the second pressure relief chamber 8010. When the telescopic rod of the telescopic device 705 is extended, the exhaust gas generated by the piston push is discharged through the telescopic rod contraction control air pipe 14, the second L-shaped hole 1005, the second pressure relief chamber 8010 and the second pressure relief hole 8011.

[0119] When the telescopic rod of the telescopic device 705 is retracted, the second cylindrical body 1001 is pressed downward by the lever 11, while the first cylindrical body 901 is lifted by the lever 11. At this point, the second through-hole 1004 is connected to the second branch air cavity 809, and the third through-hole 1006 is connected to the vacuum air cavity 8013. High-pressure air enters the telescopic device 705 through the telescopic rod retraction control air pipe 14, controlling the retraction of the telescopic rod.

[0120] At this time, the two ends of the first L-shaped hole 905 on the first cylinder 901 are respectively connected to the telescopic rod extension control air pipe 15 and the first pressure relief chamber 807. When the telescopic rod of the telescopic device 705 contracts, the exhaust gas generated by the piston push is discharged through the telescopic rod extension control air pipe 15, the first L-shaped hole 905, the first pressure relief chamber 807 and the first pressure relief hole 808.

[0121] The two telescopic rod retraction control valve columns 10 respectively control the closing of the sealing assembly 7 at the bottom of the feed box 2 and the sealing assembly 7 at the bottom of the intermediate box 4. If only one sealing assembly 7 is closed, then only one third through hole 1006 on the second cylinder 1001 is connected to the vacuum air cavity 8013, and the other second cylinder 1001 also blocks the vacuum air cavity 8013, making it impossible to evacuate the intermediate box 4.

[0122] Only when both sealing assemblies 7 are closed simultaneously and the third through holes 1006 on the two second cylindrical bodies 1001 are connected to the vacuum air chamber 8013, the entire vacuum air chamber 8013 is unobstructed, allowing the intermediate box 4 to be evacuated. Therefore, the configuration of the sub-control device 8 enables control of the telescopic device 705 and the coordinated control of the telescopic device 705 and the evacuation of the intermediate box 4.

[0123] The discharge assembly comprises a receiving box 19, an intermediate box 4, and a discharge box 20, which are sequentially connected from top to bottom. A sealing assembly 7 is provided at the connection between the receiving box 19 and the intermediate box 4, and between the intermediate box 4 and the discharge box 20. The intermediate box 4 is provided with a built-in exhaust pipe 18, which is connected to an external vacuum line. The upper end of the receiving box 19 is open and provided with a receiving port 1901, which is located directly below the end of the conveyor belt 105. A sealing assembly 7 is provided at the end of the fourth discharge channel 1902 at the bottom of the receiving box 19. A telescopic device 705 is fixedly connected to the outer wall of the receiving box 19. The shaft receptacle 703 is rotatably connected to the receiving box 19 via a shaft. When the telescopic rod of the telescopic device 705 is retracted and the sealing plate 701 is horizontal, the sealing plate 701 seals the end of the fourth discharge channel 1902.

[0124] In order to improve the sealing effect, a connecting sleeve 6 is provided between the receiving box 19 and the intermediate box 4 and between the intermediate box 4 and the discharge box 20.

[0125] The discharge assembly is externally connected to the same air circuit control assembly as the feed assembly. During the discharge process, the switch states of the sealing assembly 7 of the receiving box 19 and the sealing assembly 7 of the intermediate box 4 are as follows:

[0126] The sealing assembly 7 of the intermediate box 4 is closed, and the sealing assembly 7 of the receiving box 19 is opened. The catalyst enters the intermediate box 4 through the receiving box 19. The sealing assembly 7 of the receiving box 19 is then closed, and the sealing assembly 7 of the intermediate box 4 is opened. The catalyst falls from the intermediate box 4 into the discharge box 20 and is discharged through the discharge port 2001 on the discharge box 20. The sealing assembly 7 of the intermediate box 4 is then closed, and the internal exhaust pipe 18 is used to evacuate the intermediate box 4. The sealing assembly 7 of the receiving box 19 is then opened. The connection relationship and operation method are the same as those of the feeding assembly.

[0127] During the catalyst drying process, if the catalyst comes into contact with air at high temperatures, the oxygen in the high temperature may cause the catalyst to oxidize or sinter. Active metal components in the catalyst (such as precious metals) may be oxidized to inert oxides, losing active sites. High temperatures cause catalyst particles to aggregate, significantly reducing specific surface area and lowering reaction efficiency.

[0128] To avoid this phenomenon, in this embodiment, during the catalyst drying process, the interior of the housing 32 is filled with a protective gas. The protective gas is an inert gas, and nitrogen can be used. Combined with the aforementioned process of vacuuming the intermediate housing 4 during the feeding and discharging processes of the feed and discharge assemblies, this ensures that the catalyst does not come into contact with air during the drying process, thereby maintaining the activity of the dried catalyst and preventing sintering and aggregation.

[0129] Depend on Figures 29 to 31As shown, the protective gas circulation system includes an air intake end block 21 and an exhaust end block 26 arranged inside the box body 32. The air intake end block 21 is arranged in the box body 32 above one end of the discharge assembly, and the exhaust end block 26 is arranged in the box body 32 below one end of the feed assembly. The air intake end block 21 and the exhaust end block 26 are arranged at two opposite corners of the box body 32.

[0130] A condensation box 23 and an air pump 24 are connected in series between the air intake end block 21 and the air exhaust end block 26 . The condensation box 23 and the air pump 24 are arranged outside the box body 32 .

[0131] The suction end block 21 is connected to the condensation box 23 through the suction pipe 22. The suction pipe 22 is connected in series with a first three-way valve 28 and a second three-way valve 29. The second three-way valve 29 is close to the condensation box 23. The port of the first three-way valve 28 not connected to the suction pipe 22 is provided with an emptying pipe 30, and the port of the second three-way valve 29 not connected to the suction pipe 22 is provided with a protective gas replenishment pipe 31.

[0132] The condensation tank 23 is connected to the exhaust end block 26 through the exhaust pipe 25 , and the air pump 24 is connected in series to the exhaust end block 26 .

[0133] A drainage groove 2303 is provided at the bottom of the condensation box 23, and a drainage pipe 27 connected to the drainage groove 2303 is provided outside the condensation box 23. A water collecting bucket is provided at the end of the drainage pipe 27, and a float switch is provided on the water collecting bucket. Drainage will only start when the water level is higher than the drain outlet to avoid air leakage.

[0134] The condenser 23 cools the gas inside it in the following two ways:

[0135] 1. Forced cooling: a serpentine tube is provided inside the condensation box 23, and both ends of the serpentine tube are connected to an external heat exchanger. The gas inside the condensation box 23 contacts the serpentine tube to exchange heat, thereby achieving the effect of cooling and condensation.

[0136] Second, natural cooling: the condenser box 23 is provided with heat dissipation fins on the outside, and the condenser box 23 is provided with horizontally staggered baffles 2302 inside. The baffles 2302 allow the gas to move in a serpentine manner inside the condenser box 23, thereby extending the flow time.

[0137] A catalyst drying method, based on the above-mentioned catalyst rapid drying device, comprises the following steps:

[0138] S01. The granular catalyst enters the conveyor belt 105 of the material conveying assembly 1 inside the box body 32 through the feeding assembly. During the feeding process, the switch states of the sealing assembly 7 of the feeding box 2 and the sealing assembly 7 of the intermediate box 4 are as follows:

[0139] The sealing assembly 7 of the intermediate box 4 is closed, and the sealing assembly 7 of the feed box 2 is opened. The catalyst enters the intermediate box 4 through the feed box 2. Then the sealing assembly 7 of the feed box 2 is closed, and the built-in exhaust pipe 18 evacuates the intermediate box 4. Then the sealing assembly 7 of the intermediate box 4 is opened, and the catalyst falls from the intermediate box 4 into the end box 5, and then is continuously fed to the conveyor belt 105 through the end box 5.

[0140] S02, the granular catalyst is transported from one end of the feed assembly of the box 32 to one end of the discharge assembly by the conveyor belt 105, and is heated and dried by the heating rod 107 during transportation. The temperature of the heating rod 107 gradually increases from one end of the feed assembly to one end of the discharge assembly;

[0141] S03. The catalyst particles are discharged through the discharge assembly. During the discharge process, the switch states of the sealing assembly 7 of the receiving box 19 and the sealing assembly 7 of the intermediate box 4 are as follows:

[0142] The sealing assembly 7 of the intermediate box 4 is closed, and the sealing assembly 7 of the receiving box 19 is opened. The catalyst enters the intermediate box 4 through the receiving box 19. Then, the sealing assembly 7 of the receiving box 19 is closed, and the sealing assembly 7 of the intermediate box 4 is opened. The catalyst falls from the intermediate box 4 into the discharge box 20 and is discharged through the discharge port 2001 on the discharge box 20. Then, the sealing assembly 7 of the intermediate box 4 is closed, and the intermediate box 4 is evacuated by the built-in exhaust pipe 18. Then, the sealing assembly 7 of the receiving box 19 is opened.

[0143] S04. During the catalyst drying process, the air pump 24 is turned on to control the air pressure and the gas flow rate inside the box 32. The gas inside the box 32 is extracted through the suction end block 21 and drawn into the condensation box 23. The gas evaporated from the catalyst is liquefied inside the condensation box 23, and the dry protective gas flows back to the inside of the box 32 through the exhaust end block 26.

[0144] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A catalyst rapid drying device, characterized in that: It includes a box body (32), a material conveying assembly (1), a feeding assembly, a discharging assembly and a protective gas circulation system; The material conveying assembly (1) is arranged inside the box (32), and a plurality of heating rods (107) are arranged at intervals along the material conveying direction inside the box (32); The feeding assembly and the discharging assembly are respectively arranged at the two ends of the box body (32), and are arranged correspondingly above and below the two ends of the material conveying assembly (1); The feed assembly comprises a feed box (2), an intermediate box (4) and an end box (5) which are sequentially connected from top to bottom. A sealing assembly (7) is provided at the through connection between the feed box (2) and the intermediate box (4) and the intermediate box (4) and the end box (5). A built-in exhaust pipe (18) is provided inside the intermediate box (4), and the built-in exhaust pipe (18) is connected to an external vacuum pipeline. The discharge assembly comprises a receiving box (19), an intermediate box (4) and a discharge box (20) which are sequentially connected from top to bottom. A sealing assembly (7) is provided at the through connection between the receiving box (19) and the intermediate box (4) and the intermediate box (4) and the discharge box (20). A built-in exhaust pipe (18) is provided inside the intermediate box (4), and the built-in exhaust pipe (18) is connected to an external vacuum pipeline. The protective gas circulation system includes an air intake end block (21) and an air exhaust end block (26) arranged inside the box body (32), a condensation box (23) and an air pump (24) are connected in series between the air intake end block (21) and the air exhaust end block (26), and the condensation box (23) and the air pump (24) are arranged outside the box body (32); The feeding assembly and the discharging assembly are both externally connected to an air circuit control assembly, wherein the air circuit control assembly includes a sub-control device (8) and an external high-pressure air pipe (13) connected to the sub-control device (8), a telescopic rod contraction control air pipe (14), a telescopic rod extension control air pipe (15), a vacuum tube (16), and a connecting pipe (17); The sub-control device (8) comprises a detachably connected valve body (801) and a cover plate (802); The valve body (801) is provided with an air intake chamber (803) connected to an external high-pressure air pipe (13). The air intake chamber (803) is connected to the extension control air chamber (804) and the contraction control air chamber (805) arranged at intervals. The extension control air chamber (804) is connected to two first branch air chambers (806). The first branch air chamber (806) is connected to the extension control air pipe (15) of the telescopic rod. The contraction control air chamber (805) is connected to two second branch air chambers (809). The second branch air chamber (809) is connected to the contraction control air pipe (14) of the telescopic rod. The valve body (801) is provided with a continuous vacuum air cavity (8013) inside, and the two ends of the vacuum air cavity (8013) are respectively connected to the vacuum tube (16) and the connecting tube (17); The valve body (801) is provided with four valve stem movable holes (8012), and the planes where the axes of the valve stem movable holes (8012) lie are perpendicular to the planes where the axes of the first air cavity (806), the second air cavity (809), and the vacuum air cavity (8013) lie. Two valve stem movable holes (8012) are connected to the two first air cavities (806), and the other two valve stem movable holes (8012) are connected to the two second air cavities (809) and the vacuum air cavity (8013); A telescopic rod extension control valve column (9) is provided inside the valve stem movable hole (8012) connected to the first air cavity (806), and a first through hole (904) that cooperates with the first air cavity (806) is provided on the first cylindrical body (901) of the telescopic rod extension control valve column (9); A telescopic rod retraction control valve column (10) is provided inside the valve stem movable hole (8012) connected to the second air cavity (809); a second through hole (1004) connected to the second air cavity (809) and a third through hole (1006) connected to the vacuum air cavity (8013) are provided on the second cylindrical body (1001) of the telescopic rod retraction control valve column (10); A control assembly for controlling the sliding of a telescopic rod extension control valve column (9) and a telescopic rod retraction control valve column (10) is provided on the outside of the cover plate (802).

2. A catalyst rapid drying device according to claim 1, characterized in that: The material conveying assembly (1) includes a support frame (101), a plurality of rollers (102) are rotatably connected to the support frame (101), a conveyor belt (105) is commonly sleeved on the rollers (102), and one end of the roller (102) is coaxially connected to the output shaft of the drive motor (103); Anti-slip frames (104) fixedly connected to the support frame (101) are provided at both ends of the upper conveyor belt (105). A plurality of triangular bars (106) are provided at intervals on the top surface of the upper conveyor belt (105) along its moving direction. Both ends of the triangular bars (106) are fixedly connected to the anti-slip frames (104).

3. A catalyst rapid drying device according to claim 2, characterized in that: Both ends of the heating rod (107) are inserted into the sockets of the mounting slider (108), and the mounting slider (108) is detachably connected to the support frame (101).

4. A catalyst rapid drying device according to any one of claims 1 to 3, characterized in that: In the feed assembly, a connecting sleeve (6) is provided between the feed box (2) and the intermediate box (4), and between the intermediate box (4) and the end box (5); In the discharge assembly, a connecting sleeve (6) is provided between the receiving box (19) and the intermediate box (4), and between the intermediate box (4) and the discharge box (20).

5. A catalyst rapid drying device according to claim 4, characterized in that: The sealing assembly (7) includes a sealing plate (701) and two telescopic devices (705), wherein two ends of the sealing plate (701) are provided with a frame (702), one end of the frame (702) is provided with a rotating shaft socket (703), and the other end is provided with an extension slide (704), a first slider (707) is provided inside the extension slide (704), and an end head (706) is rotatably connected to the top of the first slider (707), and the end head (706) is fixedly connected to the end of the telescopic rod of the telescopic device (705); A sealing assembly (7) is provided at the end of the first material discharge channel (202) at the bottom of the feed box (2); the telescopic device (705) is fixedly connected to the outer wall of the feed box (2); the shaft socket (703) is rotatably connected to the feed box (2) via the shaft; when the telescopic rod of the telescopic device (705) retracts and the sealing plate (701) is in a horizontal state, the sealing plate (701) seals the end of the first material discharge channel (202); A sealing assembly (7) is provided at the end of the second material discharge channel (401) at the bottom of the intermediate box (4); the telescopic device (705) is fixedly connected to the outer wall of the intermediate box (4); the shaft socket (703) is rotatably connected to the intermediate box (4) via the shaft; when the telescopic rod of the telescopic device (705) retracts and the sealing plate (701) is in a horizontal state, the sealing plate (701) seals the end of the second material discharge channel (401); A sealing assembly (7) is provided at the end of the fourth material discharge channel (1902) at the bottom of the material receiving box (19), the telescopic device (705) is fixedly connected to the outer wall of the material receiving box (19), the shaft socket (703) is rotatably connected to the material receiving box (19) via the shaft, and when the telescopic rod of the telescopic device (705) retracts and the sealing plate (701) is in a horizontal state, the sealing plate (701) seals the end of the fourth material discharge channel (1902).

6. A catalyst rapid drying device according to claim 5, characterized in that: The telescopic device (705) adopts a pneumatic telescopic cylinder with two upper and lower control air joints.

7. A catalyst rapid drying device according to claim 6, characterized in that: The external high-pressure gas pipe (13) is connected to an external high-pressure gas supply device, and the vacuum pipe (16) is connected to an external vacuum pumping device; The telescopic rod contraction control air pipe (14) is connected to the joints of the two telescopic devices (705) through the two first branch pipes (1401); The telescopic rod extension control air pipe (15) is connected to the joints of the two telescopic devices (705) through the two second branch pipes (1501); The connecting pipe (17) is connected to the built-in exhaust pipe (18).

8. A catalyst rapid drying device according to any one of claims 1 to 3 or 5 to 7, characterized in that: The suction end block (21) is connected to the condensation box (23) through the suction pipe (22). The suction pipe (22) is connected in series with a first three-way valve (28) and a second three-way valve (29). The second three-way valve (29) is close to the condensation box (23). The port of the first three-way valve (28) not connected to the suction pipe (22) is provided with an exhaust pipe (30), and the port of the second three-way valve (29) not connected to the suction pipe (22) is provided with a protective gas supply pipe (31).

9. A catalyst drying method, according to the catalyst rapid drying device of claim 7, characterized in that: The following steps are involved: S01. The granular catalyst enters the conveyor belt (105) of the material conveying assembly (1) inside the box (32) through the feeding assembly. During the feeding process, the switch states of the sealing assembly (7) of the feeding box (2) and the sealing assembly (7) of the intermediate box (4) are as follows: The sealing assembly (7) of the intermediate box (4) is closed, the sealing assembly (7) of the feed box (2) is opened, the catalyst enters the intermediate box (4) through the feed box (2), and then the sealing assembly (7) of the feed box (2) is closed, the built-in vacuum pipe (18) evacuates the intermediate box (4), and then the sealing assembly (7) of the intermediate box (4) is opened, the catalyst falls from the intermediate box (4) into the end box (5), and then continuously feeds to the conveyor belt (105) through the end box (5); S02. The granular catalyst is transported from one end of the feed assembly of the box (32) to one end of the discharge assembly by a conveyor belt (105). During the transportation, the catalyst is heated and dried by a heating rod (107). The temperature of the heating rod (107) gradually increases from one end of the feed assembly to one end of the discharge assembly. S03. The catalyst particles are discharged through the discharge assembly. During the discharge process, the switch states of the sealing assembly (7) of the receiving box (19) and the sealing assembly (7) of the intermediate box (4) are as follows: The sealing assembly (7) of the intermediate box (4) is closed, the sealing assembly (7) of the receiving box (19) is opened, the catalyst enters the intermediate box (4) through the receiving box (19), then the sealing assembly (7) of the receiving box (19) is closed, the sealing assembly (7) of the intermediate box (4) is opened, the catalyst falls from the middle to (4) into the discharge box (20), and then is discharged through the discharge port (2001) on the discharge box (20), then the sealing assembly (7) of the intermediate box (4) is closed, the built-in exhaust pipe (18) is used to evacuate the intermediate box (4), and then the sealing assembly (7) of the receiving box (19) is opened; S04. During the drying process of the catalyst, the air pump (24) is turned on to control the air pressure and the gas flow rate inside the box (32). The gas inside the box (32) is drawn out through the air suction end block (21) and drawn into the condensation box (23). The gas evaporated from the catalyst is liquefied inside the condensation box (23), and the dry protective gas flows back to the inside of the box (32) through the exhaust end block (26).

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