Rapid drying device and method for catalyst

Abstract

The invention relates to a catalyst rapid drying device and method, and belongs to the technical field of drying. Comprising 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 in the box body, and a plurality of heating rods which are arranged at intervals in the material conveying direction are arranged in the box body. The feeding assembly and the discharging assembly are arranged at the two ends of the box body respectively and correspond to the two ends of the material conveying assembly up and down respectively. The protective gas circulation system comprises a gas suction end block and a gas exhaust end block which are arranged in the box body, a condensation box and a gas pump are connected between the gas suction end block and the gas exhaust end block in series, and the condensation box and the gas pump are arranged outside the box body. In the drying process of the catalyst, inert gas serves as shielding gas to protect the catalyst in the whole process, the catalyst is prevented from making contact with oxygen in the high-temperature environment, and the problems of sintering, gathering and inactivation in the drying process are solved.

Description

Technical Field

[0001] This application belongs to the technical field of drying, and particularly relates to a catalyst rapid drying device and method. Background Art

[0002] After production, the catalyst needs to be dried to eliminate the interference of moisture, avoid moisture occupying the surface active sites of the catalyst, reduce the reaction efficiency, and change the chemical properties. The dried catalyst can also increase its stability, facilitating transportation and storage.

[0003] The existing catalyst drying is mainly by hot air blowing. In this drying method, the catalyst will come into contact with oxygen in the hot air and is prone to sintering or oxidation in a high-temperature environment, reducing the activity and affecting the subsequent use effect. Summary of the Invention

[0004] The technical problem to be solved by this application is: overcoming the deficiencies of the prior art, providing a catalyst rapid drying device and method. In the process of drying the catalyst, an inert gas is used as a protective gas throughout the process to protect it and avoid its contact with oxygen in a high-temperature environment, 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: A catalyst rapid drying device includes a box body, a material conveying assembly, a feeding assembly, a discharging assembly, and a protective gas circulation system.

[0006] The material conveying assembly is arranged inside the box body, and several heating rods are arranged at intervals along the material conveying direction inside the box body.

[0007] The feeding assembly and the discharging assembly are respectively arranged at both ends of the box body, and are arranged corresponding to the upper and lower parts of both ends of the material conveying assembly.

[0008] The feeding assembly includes a feeding box, an intermediate box, and a terminal box that are connected in series from top to bottom. Sealing assemblies are provided at the through connections between the feeding box and the intermediate box, and between the intermediate box and the terminal box. An internal suction pipe is arranged inside the intermediate box, and the internal suction pipe is connected to an external vacuum pipeline.

[0009] The discharging assembly includes a receiving box, an intermediate box, and a discharging box that are connected in series from top to bottom. Sealing assemblies are provided at the through connections between the receiving box and the intermediate box, and between the intermediate box and the discharging box. An internal suction pipe is arranged inside the intermediate box, and the internal suction pipe is connected to an external vacuum pipeline.

[0010] 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, and the condensation box and the air pump are arranged outside the box body.

[0011] Preferably, the material conveying assembly includes a support frame, on which several rollers are rotatably connected. A conveyor belt is sleeved on the rollers together, and one of the rollers at one end is coaxially connected to the output shaft of the driving motor.

[0012] Anti - detachment frames fixedly connected to the support frame are provided at both ends of the upper conveyor belt. Along the moving direction of the upper conveyor belt, several triangular strips are arranged at intervals on the top surface of the upper conveyor belt, and both ends of the triangular strips are fixedly connected to the anti - detachment frames respectively.

[0013] Preferably, both ends of the heating rod are inserted into the jacks of the mounting slider, and the mounting slider is detachably connected to the support frame.

[0014] Preferably, in the feeding assembly, a connecting sleeve is sleeved between the feeding box and the intermediate box, and also between the intermediate box and the end box.

[0015] In the discharging assembly, a connecting sleeve is sleeved between the material receiving box and the intermediate box, and also between the intermediate box and the discharging box.

[0016] Preferably, the sealing assembly includes a sealing plate and two telescopic devices. Frames are provided at both ends of the sealing plate. A rotating shaft jack is provided at one end of the frame, and an extended sliding groove is provided at the other end. A slider is slidably arranged inside the extended sliding groove, and a head is rotatably connected above the slider. The head is fixedly connected to the end of the telescopic rod of the telescopic device.

[0017] A sealing assembly is provided at the port of the first material discharging channel at the bottom of the feeding box. The telescopic device is fixedly connected to the outer wall of the feeding box. The rotating shaft jack is rotatably connected to the feeding box through a rotating 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 material discharging channel.

[0018] A sealing assembly is provided at the port of the second material discharging channel at the bottom of the intermediate box. The telescopic device is fixedly connected to the outer wall of the intermediate box. The rotating shaft jack is rotatably connected to the intermediate box through a rotating 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 material discharging channel.

[0019] A sealing assembly is provided at the port of the fourth material discharging 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 rotating shaft jack is rotatably connected to the material receiving box through a rotating 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 discharging channel.

[0020] Preferably, the telescopic device adopts a pneumatic telescopic cylinder with upper and lower control air joints.

[0021] Preferably, the feeding assembly and the discharging assembly are both externally connected with an air circuit control assembly. The air circuit control assembly includes a sub-control device and an externally connected high-pressure air pipe, a telescopic rod contraction control air pipe, a telescopic rod extension control air pipe, a vacuum pipe, and a connecting pipe that are connected to the sub-control device in a through manner.

[0022] The externally connected high-pressure air pipe is connected to an external high-pressure air supply device, and the vacuum pipe is connected to an external vacuum pumping device.

[0023] The telescopic rod contraction control air pipe is connected to the joints of the two telescopic devices through two first branch pipes.

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

[0025] The connecting pipe is connected to the built-in air extraction pipe in a through manner.

[0026] Preferably, the sub-control device includes a valve body and a cover plate that are detachably connected.

[0027] An air inlet cavity connected to the externally connected high-pressure air pipe is provided inside the valve body. The air inlet cavity is connected to an extension control air cavity and a contraction control air cavity that are arranged at intervals in a through manner. Two first branch air cavities are connected to the extension control air cavity in a through manner. The first branch air cavity is connected to the telescopic rod extension control air pipe in a through manner. Two second branch air cavities are connected to the contraction control air cavity in a through manner. The second branch air cavity is connected to the telescopic rod contraction control air pipe in a through manner.

[0028] A through vacuum air cavity is provided inside the valve body. Both ends of the vacuum air cavity are connected to the vacuum pipe and the connecting pipe in a through manner.

[0029] Four valve rod moving holes are provided on the valve body. The plane where the axes of the valve rod moving holes are located is perpendicular to the plane where the axes of the first branch air cavity, the second branch air cavity, and the vacuum air cavity are located.

[0030] Two valve rod moving holes are connected to the two first branch air cavities in a through manner, and the other two valve rod moving holes are connected to the two second branch air cavities and the vacuum air cavity in a through manner.

[0031] A telescopic rod elongation control valve column is provided inside the valve rod moving hole connected to the first branch air cavity. A first through hole that is connected to the first branch air cavity in a matching manner is provided on the first cylinder of the telescopic rod elongation control valve column.

[0032] A telescopic rod retraction control valve column is provided inside the valve rod moving hole connected to the second branch air cavity. A second through hole that is connected to the second branch air cavity in a matching manner and a third through hole that is connected to the vacuum air cavity in a matching manner are provided on the second cylinder of the telescopic rod retraction control valve column.

[0033] A control assembly for controlling the sliding of the telescopic rod elongation control valve column and the telescopic rod retraction control valve column is provided outside the cover plate.

[0034] Preferably, the suction end block is connected to the condensation box through a suction pipe. 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. An emptying pipe is provided at the port of the first three-way valve that is not connected to the suction pipe, and a protective gas supply pipe is provided at the port of the second three-way valve that is not connected to the suction pipe.

[0035] A catalyst drying method, according to the above-mentioned catalyst rapid drying device, includes the following steps: 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 opening and closing states of the sealing assemblies of the feeding box and the intermediate box are as follows: The sealing assembly of the intermediate box is closed, and the sealing assembly of the feeding box is opened. The catalyst enters the intermediate box through the feeding box, then the sealing assembly of the feeding box is closed, the built-in suction pipe evacuates the intermediate box, then the sealing assembly of the intermediate box is opened, the catalyst drops from the intermediate box into the end box, and then continuously supplies the conveyor belt through the end box.

[0036] S02. The granular catalyst is transported from one end of the box feeding assembly to one end of the discharging assembly by the conveyor belt and is heated and dried by the heating rods during the transportation. The temperature of the heating rods gradually increases from one end of the feeding assembly to one end of the discharging assembly.

[0037] S03. The catalyst particles are discharged through the discharging assembly. During the discharging process, the opening and closing states of the sealing assemblies of the receiving box and the intermediate box are as follows: The sealing assembly of the intermediate box is closed, and 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 drops from the intermediate box into the discharging box, and then is discharged through the discharging port on the discharging box. After that, the sealing assembly of the intermediate box is closed. After the built-in suction pipe evacuates the intermediate box, the sealing assembly of the receiving box is opened again.

[0038] S04. During the drying of the catalyst, 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 drawn into the condensation box. The gas evaporated from the catalyst is liquefied inside the condensation box, and the dry protective gas flows back into the box through the exhaust end block.

[0039] Compared with the prior art, the beneficial effects of the present application are: (1) During the drying of the catalyst, the inside of the box is filled with protective gas. Combined with the processes of evacuating the intermediate box during the feeding and discharging processes of the feeding assembly and the discharging assembly, it can ensure that the catalyst will not come into contact with air during the drying process, ensure the activity of the dried catalyst, and avoid sintering and aggregation.

[0040] (2) By setting different temperatures of the heating rods, a temperature field with a gradually increasing temperature is formed inside the box along the moving direction of the catalyst, which can gradually heat and dry the catalyst, avoiding the situation that after the catalyst enters the inside of the box, the temperature rises too fast, resulting in too large a temperature difference between the inside and the outer surface of the catalyst and causing the catalyst particles to crack. Description of the Drawings

[0041] The present application will be further described below in conjunction with the drawings and embodiments.

[0042] Figure 1 It is a structural diagram of a catalyst rapid drying device of the present application. Figure 2 It is a front view of a catalyst rapid drying device of the present application. Figure 3 It is a partial cross-sectional view of the box body of a catalyst rapid drying device of the present application. Figure 4 It is a structural diagram of a catalyst rapid drying device of the present application after removing the box body. Figure 5 It is a structural diagram of a catalyst rapid drying device of the present application after removing the box body and the protective gas circulation system. Figure 6 It is a structural diagram of the material transmission assembly in a catalyst rapid drying device of the present application. Figure 7 It is a structural diagram of the heating device in a catalyst rapid drying device of the present application. Figure 8 It is an exploded view of the heating device in a catalyst rapid drying device of the present application. Figure 9 It is a structural diagram of the feeding assembly in a catalyst rapid drying device of the present application. Figure 10 It is an exploded view of the feeding assembly in a catalyst rapid drying device of the present application. Figure 11 It is a partial cross-sectional view of the feeding assembly in a catalyst rapid drying device of the present application. Figure 12 It is a structural diagram of the intermediate box in a catalyst rapid drying device of the present application. Figure 13 It is a cross-sectional view of the intermediate box in a catalyst rapid drying device of the present application. Figure 14 It is a structural diagram of the sealing assembly in a catalyst rapid drying device of the present application. Figure 15 It is a cross-sectional view of the sealing assembly in a catalyst rapid drying device of the present application. Figure 16Structural diagram of the gas path control assembly in a catalyst rapid drying device of the present application Figure 17 Structural diagram of the sub-control device in a catalyst rapid drying device of the present application Figure 18 Exploded view of the sub-control device in a catalyst rapid drying device of the present application Figure 19 First sectional view of the sub-control device in a catalyst rapid drying device of the present application Figure 20 Second sectional view of the sub-control device in a catalyst rapid drying device of the present application Figure 21 Third sectional view of the sub-control device in a catalyst rapid drying device of the present application Figure 22 Structural diagram of the telescopic rod extension control valve column in a catalyst rapid drying device of the present application Figure 23 For Figure 22 sectional view Figure 24 Structural diagram of the telescopic rod retraction control valve column in a catalyst rapid drying device of the present application Figure 25 For Figure 24 sectional view Figure 26 First structural diagram of the discharge assembly in a catalyst rapid drying device of the present application Figure 27 Second structural diagram of the discharge assembly in a catalyst rapid drying device of the present application Figure 28 Partial sectional view of the discharge assembly in a catalyst rapid drying device of the present application Figure 29 Structural diagram of the protective gas circulation system in a catalyst rapid drying device of the present application Figure 30 First sectional view of the condensation box in a catalyst rapid drying device of the present application Figure 31 Second sectional view of the condensation box in a catalyst rapid drying device of the present application

[0043] In the figure: 1 - Material conveying assembly, 101 - Support frame, 102 - Rotating roller, 103 - Driving motor, 104 - Anti - detachment frame, 105 - Conveyor belt, 106 - Triangular strip, 107 - Heating rod, 108 - Installation slider, 2 - Feed box, 201 - Feed channel, 202 - First blanking channel, 3 - Suction hood, 301 - Suction pipe, 4 - Intermediate box, 401 - Second blanking channel, 5 - End box, 501 - Third blanking channel, 6 - Connecting sleeve, 7 - Sealing assembly, 701 - Sealing plate, 702 - Frame, 703 - Shaft jack, 704 - Extended chute, 705 - Telescopic device, 706 - End, 707 - Slider, 8 - Sub - control device, 801 - Valve body, 802 - Cover plate, 803 - Intake cavity, 804 - Extended control air cavity, 805 - Shrinkage control air cavity, 806 - First branch air cavity, 807 - First pressure - relief cavity, 808 - First pressure - relief hole, 809 - Second branch air cavity, 8010 - Second pressure - relief cavity, 8011 - Second pressure - relief hole, 8012 - Valve rod moving hole, 8013 - Vacuum air cavity, 9 - Control column for telescopic rod elongation, 901 - First cylinder, 902 - First control rod, 903 - First ball - catching head, 904 - First through - hole, 905 - First L - shaped hole, 10 - Control column for telescopic rod retraction, 1001 - Second cylinder, 1002 - Second control rod, 1003 - Second ball - catching 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 - Control air pipe for telescopic rod contraction, 1401 - First branch pipe, 15 - Control air pipe for telescopic rod extension, 1501 - Second branch pipe, 16 - Vacuum pipe, 17 - Connecting pipe, 18 - Built - in suction pipe, 19 - Material receiving box, 1901 - Material receiving port, 1902 - Fourth blanking channel, 20 - Discharge box, 2001 - Discharge port, 21 - Suction end block, 22 - Suction pipe, 23 - Condensation box, 2301 - Heat - dissipating fins, 2302 - Baffle, 2303 - Drainage groove, 24 - Air pump, 25 - Exhaust pipe, 26 - Exhaust end block, 27 - Drain pipe, 28 - First three - way valve, 29 - Second three - way valve, 30 - Drain - off pipe, 31 - Protection gas supply pipe, 32 - Box body. Detailed implementation mode

[0044] With reference to the attached drawings, a catalyst rapid drying device and its method of the present application will be further described in detail, but it is not a limitation to the present application.

[0045] As Figures 1 to 31 shown, a catalyst rapid drying device includes a box body 32, a material conveying assembly 1, a feeding assembly, a discharging assembly, and a protection gas circulation system. The box body 32 includes upper and lower parts, which are detachably connected by bolts, and a sealing gasket is provided at the abutting part of the two parts.

[0046] The described material conveying assembly 1 is arranged inside the box body 32 and consists of Figure 6 As shown, the material conveying assembly 1 includes a support frame 101. A plurality of rollers 102 are rotatably connected to the support frame 101. The axes of the rollers 102 are located on the same horizontal plane. A ring-shaped conveyor belt 105 is sleeved on the rollers 102 together. One end of the rollers 102 is coaxially connected to the output shaft of the driving motor 103. The driving motor 103 is arranged outside the box body 32 and fixedly connected to the outer wall of the box body 32.

[0047] Anti-drop frames 104 fixedly connected to the support frame 101 are provided at both ends of the upper conveyor belt 105. A plurality of triangular strips 106 are arranged at intervals along the moving direction of the top surface of the upper conveyor belt 105. Both ends of the triangular strips 106 are fixedly connected to the anti-drop frames 104 respectively. The anti-drop frames 104 prevent catalyst particles from falling from both sides of the conveyor belt 105 during the moving process. The cross-sectional shape of the triangular strips 106 is a right triangle, and the inclined surface of the triangular strips 106 faces the moving direction of the catalyst particles. When the catalyst particles move to the position of the triangular strips 106, they will move upward along the inclined surface of the triangular strips 106 and fall after reaching the top. During the upward movement and falling process of the catalyst particles along the inclined surface of the triangular strips 106, the catalyst particles will rotate, thereby changing the contact surface with the conveyor belt 105 and optimizing the drying effect of the catalyst particles.

[0048] A plurality of heating rods 107 are arranged inside the box body 32 at intervals along the material conveying direction. Further, both ends of the heating rods 107 are inserted into the jacks of the mounting sliders 108, and the mounting sliders 108 are detachably connected to the support frame 101. The heating rods 107 are arranged below the upper conveyor belt 105, and a plurality of ventilation holes are provided on the conveyor belt 105 to facilitate the drying of the catalyst.

[0049] The feeding assembly and the discharging assembly are respectively arranged at both ends of the box body 32 and are arranged corresponding to the upper and lower positions at both ends of the material conveying assembly 1 respectively. In this embodiment, the temperatures of the plurality of heating rods 107 gradually increase from the end of the feeding assembly to the end of the discharging assembly. In this way, a temperature field with a gradually increasing temperature is formed inside the box body 32 along the moving direction of the catalyst, which can gradually heat and dry the catalyst, and avoid the situation that after the catalyst enters the box body 32, the temperature rises too fast, resulting in too large a temperature difference between the inside and the outside surface of the catalyst and causing the catalyst particles to crack.

[0050] Consisting of Figures 9 to 13 As shown, the feeding assembly includes a feeding box 2, an intermediate box 4, and a terminal box 5 that are connected in series from top to bottom. Sealing assemblies 7 are provided at the through connections between the feeding box 2 and the intermediate box 4 and between the intermediate box 4 and the terminal box 5. An internal suction pipe 18 is arranged inside the intermediate box 4, and the internal suction pipe 18 is connected to an external vacuum pipeline.

[0051] The first material discharge channel 202 under the feed box 2 and the second material discharge channel 401 under the intermediate box 4 both adopt a tapered arrangement. In order to improve the sealing effect of the connection between the feed box 2, the intermediate box 4 and the terminal 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 terminal box 5.

[0052] The feed channel 201 of the feed box 2 is arranged at an angle, and the catalyst particles slide into the feed box 2 by their own gravity. A scraper is provided on the feed channel 201, and the distance between the bottom of the scraper and the bottom surface of the 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, so that the catalyst particles on the feed channel 201 are arranged in a single layer after passing through the scraper, and there is no stacking phenomenon.

[0053] A large opening is provided on the top of the feed box 2, and an adsorption cover 3 is provided on the outer cover of the opening. The adsorption cover 3 is connected to the suction pipe 301, and the rear end of the suction pipe 301 is connected to the external air extraction system and the dust collection bag. When the catalyst particles slide into the feed box 2 from the feed channel 201 in a parabolic shape, the suction force of the adsorption cover 3 is adjusted, and the dust and incomplete particles in the catalyst particles can be sucked away through the suction pipe 301, thereby achieving the functions of waste stripping and dust removal.

[0054] 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. The sealing plate 701 is provided with frames 702 at both ends thereof, one end of the frame 702 is provided with a rotating shaft insertion hole 703, and the other end is provided with an extended slide groove 704, and the end of the extended slide groove 704 protrudes out of the sealing plate 701. A slider 707 is slidably provided inside the extended slide groove 704, and a U-shaped end 706 is rotatably connected above the slider 707, and the end 706 is fixedly connected to the end of the telescopic rod of the telescopic device 705.

[0055] A sealing assembly 7 is provided at the port 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 through the shaft. The telescopic rod of the telescopic device 705 is retracted, and the sealing plate 701 is pulled 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 port 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 to push the sealing plate 701 to rotate downward around the shaft inside the shaft socket 703. During the rotation of the sealing plate 701, the slider 707 slides along the extended slide groove 704 in the direction away from the shaft socket 703, and the end 706 and the slider 707 rotate to avoid interference.

[0056] A sealing assembly 7 is provided at the port of the second material discharge channel 401 at the bottom of the middle box 4, the telescopic device 705 is fixedly connected to the outer wall of the middle box 4, the shaft socket 703 is rotatably connected to the middle box 4 through the shaft, and when the telescopic rod of the telescopic device 705 is retracted and the sealing plate 701 is in a horizontal state, the sealing plate 701 seals the port of the second material discharge channel 401.

[0057] The sealing is performed by flipping the sealing plate 701. Compared with the existing gate valve or ball valve, this sealing method can effectively reduce or even avoid the squeezing and shearing of the catalyst particles during the sealing process, and will not damage the integrity of the catalyst particles.

[0058] 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 middle box 4 is closed, the sealing assembly 7 of the feed box 2 is opened, the catalyst enters the middle box 4 through the feed box 2, and then the sealing assembly 7 of the feed box 2 is closed, the built-in exhaust pipe 18 evacuates the middle box 4, and then the sealing assembly 7 of the middle box 4 is opened, the catalyst falls from the middle box 4 into the terminal box 5, and then continuously feeds to the conveyor belt 105 through the terminal box 5. A third material discharge channel 501 with a constricted opening is provided below the terminal box 5, and the third material discharge channel 501 is located directly above the conveyor belt 105.

[0059] The control method of each sealing assembly 7 during the feeding process can not only prevent external air from entering the box body 32, but also ensure continuous feeding of the third feeding channel 501. Since the third feeding channel 501 is a constricted arrangement, the feeding can be completed under the premise that a part of the catalyst particles remain in the terminal box 5.

[0060] Only when the sealing plates 701 of the two sealing assemblies 7 in the feeding assembly are in a horizontal state at the same time, the built-in exhaust pipe 18 starts to exhaust gas, and the gas inside the middle box 4 is extracted to prevent the external air from entering the box body 32 when the middle box 4 is connected to the terminal box 5. In order to achieve this purpose, in this embodiment, the telescopic device 705 adopts a pneumatic telescopic cylinder with two upper and lower control air joints. And it is linked and controlled by the air path control assembly connected to the outside of the feeding assembly.

[0061] 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 , 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 which are connected to the sub-control device 8 .

[0062] The external high-pressure gas pipe 13 is connected to an external high-pressure gas supply device, and the vacuum tube 16 is connected to an external vacuum extraction device.

[0063] The telescopic rod contraction control air pipe 14 is connected to the air inlet and outlet joints of two telescopic devices 705 that control the contraction of the telescopic rod through two first branch pipes 1401.

[0064] The telescopic rod extension control air pipe 15 is connected to the air inlet and outlet joints of two telescopic devices 705 that control the extension of the telescopic rod through two second branch pipes 1501.

[0065] The connecting pipe 17 is connected to the built-in air extraction pipe 18 in a penetrating manner.

[0066] The sub-control device 8 includes a valve body 801 and a cover plate 802 that are detachably connected, and the two are fixedly connected by bolts.

[0067] An air inlet cavity 803 connected to the external high-pressure air pipe 13 is provided inside the valve body 801. The air inlet cavity 803 is connected to the extension control air cavity 804 and the contraction control air cavity 805 arranged at intervals in a penetrating manner. Two first branch air cavities 806 are connected to the extension control air cavity 804 in a penetrating manner, and the first branch air cavities 806 are connected to the telescopic rod extension control air pipe 15 in a penetrating manner. Two second branch air cavities 809 are connected to the contraction control air cavity 805 in a penetrating manner, and the second branch air cavities 809 are connected to the telescopic rod contraction control air pipe 14 in a penetrating manner.

[0068] The axes of the air inlet cavity 803, the extension control air cavity 804, the contraction control air cavity 805, the first branch air cavity 806, and the second branch air cavity 809 are all in the same plane.

[0069] A through 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 pipe 17 in a penetrating manner.

[0070] Four valve rod moving holes 8012 are provided on the valve body 801. The plane where the axes of the valve rod moving holes 8012 are located is perpendicular to the plane where the axes of the first branch air cavity 806, the second branch air cavity 809, and the vacuum air cavity 8013 are located. Two valve rod moving holes 8012 are connected to the two first branch air cavities 806 in a penetrating manner, and the other two valve rod moving holes 8012 are connected to the two second branch air cavities 809 and the vacuum air cavity 8013 in a penetrating manner.

[0071] A telescopic rod elongation control valve column 9 is provided inside the valve rod moving hole 8012 connected to the first branch air cavity 806. A first through hole 904 that is cooperatively connected to the first branch air cavity 806 is provided on the first cylinder 901 of the telescopic rod elongation control valve column 9.

[0072] Inside the valve stem moving hole 8012 that is connected to the second air cavity 809 in a penetrating manner, a telescopic rod retraction control valve column 10 is provided. On the second cylinder 1001 of the telescopic rod retraction control valve column 10, a second through hole 1004 that is connected to the second air cavity 809 in a matching manner and a third through hole 1006 that is connected to the vacuum air cavity 8013 in a matching manner are provided.

[0073] Outside the cover plate 802, a control assembly for controlling the sliding of the telescopic rod extension control valve column 9 and the telescopic rod retraction control valve column 10 is provided.

[0074] 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 central position of the lever 11, and the servo motor 12 controls the swinging of the lever 11. On the lever 11, a waist-shaped hole 1101 is provided on each side of the output shaft of the servo motor 12.

[0075] The telescopic rod extension control valve column 9 includes a first cylinder 901 and a first control rod 902 that are coaxially and fixedly connected. The end of the first control rod 902 penetrates outside the cover plate 802. Two first clamping ball heads 903 are provided at the end of the first control rod 902. The end of the first control rod 902 penetrates into the waist-shaped hole 1101, and the two first clamping ball heads 903 clamp the lever 11 in the middle.

[0076] The telescopic rod retraction control valve column 10 includes a second cylinder 1001 and a second control rod 1002 that are coaxially and fixedly connected. The end of the second control rod 1002 penetrates outside the cover plate 802. Two second clamping ball heads 1003 are provided at the end of the second control rod 1002. The end of the second control rod 1002 penetrates into the waist-shaped hole 1101, and the two second clamping ball heads 1003 clamp the lever 11 in the middle.

[0077] 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 air intake and exhaust.

[0078] In order to realize pressure relief during the telescopic movement of the telescopic rod of the telescopic device 705, a first pressure relief cavity 807 and a second pressure relief cavity 8010 are provided inside the valve body 801. Both ends of the first pressure relief cavity 807 are connected to the two first air cavities 806 in a penetrating manner. Both ends of the second pressure relief cavity 8010 are connected to the two second air cavities 809 in a penetrating manner. The first pressure relief cavity 807 is connected to the outside of the valve body 801 through a first pressure relief hole 808. The second pressure relief cavity 8010 is connected to the outside of the valve body 801 through a second pressure relief hole 8011.

[0079] Correspondingly, a first L-shaped hole 905 is provided on the first cylinder 901, and a second L-shaped hole 1005 is provided on the second cylinder 1001.

[0080] When the telescopic rod of the telescopic device 705 is in the extended state, the first cylinder 901 is pressed down by the lever 11, and the second cylinder 1001 is lifted by the lever 11. At this time, the first through hole 904 is connected to the first branch air chamber 806 in a penetrating manner, so that the extended control air chamber 804 is connected to the telescopic rod extension control air pipe 15 through the first branch air chamber 806, and 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.

[0081] At this time, both 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, and the exhaust gas generated by the piston push when the telescopic rod of the telescopic device 705 extends 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.

[0082] When the telescopic rod of the telescopic device 705 is in the contracted state, the second cylinder 1001 is pressed down by the lever 11, and the first cylinder 901 is lifted by the lever 11. At this time, the second through hole 1004 is connected to the second branch air chamber 809 in a penetrating manner, and the third through hole 1006 is connected to the vacuum air chamber 8013 in a penetrating manner. The high-pressure air enters the telescopic device 705 through the telescopic rod contraction control air pipe 14 to control the telescopic rod to retract.

[0083] At this time, both 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, and the exhaust gas generated by the piston push when the telescopic rod of the telescopic device 705 contracts 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.

[0084] The two telescopic rod retraction control valve posts 10 respectively control the closing of the sealing assemblies 7 at the bottom of the feed box 2 and the sealing assemblies 7 at the bottom of the intermediate box 4. If only one sealing assembly 7 is closed, then only the third through hole 1006 on one of the second cylinders 1001 is connected to the vacuum air chamber 8013 in a penetrating manner, and the other second cylinder 1001 also blocks the vacuum air chamber 8013, making it impossible to evacuate the intermediate box 4.

[0085] Only when the two sealing assemblies 7 are closed at the same time and the third through holes 1006 on the two second cylinders 1001 are both connected to the vacuum air chamber 8013 in a penetrating manner, the entire vacuum air chamber 8013 is in an unobstructed state, and the intermediate box 4 can be evacuated. Therefore, through the setting of the sub-control device 8, the control of the telescopic device 705 and the linkage control of the telescopic device 705 and the evacuation of the intermediate box 4 can be realized.

[0086] The described discharging assembly includes a material receiving box 19, an intermediate box 4, and a discharging box 20 that are connected in series from top to bottom. Sealing assemblies 7 are provided at the through connections between the material receiving box 19 and the intermediate box 4, and between the intermediate box 4 and the discharging box 20. An internal suction pipe 18 is provided inside the intermediate box 4, and the internal suction pipe 18 is connected to an external vacuum pipeline. The upper end of the material receiving box 19 is open with a material receiving port 1901, and the material receiving port 1901 is directly below the end of the conveyor belt 105. A sealing assembly 7 is provided at the port of the fourth material discharging 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, and the rotating shaft insertion hole 703 is rotatably connected to the material receiving box 19 through a rotating 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 fourth material discharging channel 1902.

[0087] To improve the sealing effect, a connecting sleeve 6 is sleeved between the material receiving box 19 and the intermediate box 4, and between the intermediate box 4 and the discharging box 20.

[0088] An air path control assembly identical to the feeding assembly is externally connected to the discharging assembly. During the discharging process, the switching states of the sealing assemblies 7 of the material receiving box 19 and the intermediate box 4 are as follows: The sealing assembly 7 of the intermediate box 4 is closed, and the sealing assembly 7 of the material receiving box 19 is opened. The catalyst enters the intermediate box 4 through the material receiving box 19. Then, the sealing assembly 7 of the material receiving box 19 is closed, and the sealing assembly 7 of the intermediate box 4 is opened. The catalyst drops from the intermediate box 4 into the discharging box 20 and is discharged through the discharging port 2001 on the discharging box 20. After that, the sealing assembly 7 of the intermediate box 4 is closed. After the internal suction pipe 18 evacuates the intermediate box 4 to a vacuum, the sealing assembly 7 of the material receiving box 19 is opened. The connection relationship and operation method are the same as those of the feeding assembly.

[0089] During the drying process of the catalyst, if the catalyst contacts air in a high-temperature environment, oxygen at high temperature may cause the catalyst to oxidize or sinter. The active metal components (such as precious metals) in the catalyst may be oxidized to inert oxides, losing active sites. High temperature promotes the aggregation of catalyst particles, and the specific surface area decreases significantly, reducing the reaction efficiency.

[0090] To avoid this phenomenon, in this embodiment, during the drying process of the catalyst, the inside of the box body 32 is filled with a protective gas, and the protective gas is an inert gas, which can be nitrogen. Combining the above-mentioned processes of evacuating the intermediate box 4 during the feeding and discharging processes of the feeding assembly and the discharging assembly, it can be ensured that the catalyst will not contact air during the drying process, ensuring the activity of the dried catalyst and avoiding sintering and aggregation.

[0091] By Figures 29 to 31As shown in the figure, the protective gas circulation system includes a suction end block 21 and an exhaust end block 26 arranged inside the box body 32. The suction end block 21 is arranged above one end of the box body 32 where the discharging assembly is located, and the exhaust end block 26 is arranged below one end of the box body 32 where the feeding assembly is located. The suction end block 21 and the exhaust end block 26 are arranged at two opposite corners of the box body 32.

[0092] A condensation box 23 and an air pump 24 are connected in series between the suction end block 21 and the exhaust end block 26. The condensation box 23 and the air pump 24 are arranged outside the box body 32.

[0093] The suction end block 21 is connected to the condensation box 23 through a suction pipe 22. A first three-way valve 28 and a second three-way valve 29 are connected in series on the suction pipe 22. The second three-way valve 29 is close to the condensation box 23. An emptying pipe 30 is provided at the port of the first three-way valve 28 that is not connected to the suction pipe 22, and a protective gas supply pipe 31 is provided at the port of the second three-way valve 29 that is not connected to the suction pipe 22.

[0094] The condensation box 23 is connected to the exhaust end block 26 through an exhaust pipe 25, and the air pump 24 is connected in series on the exhaust end block 26.

[0095] A drain trough 2303 is provided at the bottom of the condensation box 23. A drain pipe 27 is provided outside the condensation box 23 and is connected to the drain trough 2303. A water collecting bucket is provided at the end of the drain pipe 27. A float switch is provided on the water collecting bucket, and drainage starts only when the water level is higher than the drain outlet to avoid air leakage.

[0096] The condensation box 23 cools the gas inside it in the following two ways: One, forced cooling. A serpentine pipe is provided inside the condensation box 23. The two ends of the serpentine pipe are connected to an external heat exchanger. The gas inside the condensation box 23 comes into contact with the serpentine pipe for heat exchange to achieve the effect of cooling and condensation. Two, natural cooling. Heat dissipation fins are provided outside the condensation box 23. Baffles 2302 arranged horizontally and staggered are provided inside the condensation box 23. The baffles 2302 make the gas move in a serpentine shape inside the condensation box 23, extending the flow time.

[0097] A method for drying a catalyst, based on the above-mentioned catalyst rapid drying device, includes the following steps: 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 opening and closing states of the sealing assemblies 7 of the feeding box 2 and the intermediate box 4 are as follows: The seal assembly 7 of the intermediate box 4 is closed, and the seal assembly 7 of the feed box 2 is opened. The catalyst enters the intermediate box 4 through the feed box 2. Then, the seal assembly 7 of the feed box 2 is closed. The built-in suction pipe 18 evacuates the intermediate box 4. Then, the seal assembly 7 of the intermediate box 4 is opened, and the catalyst drops from the intermediate box 4 into the end box 5. Then, continuous feeding is carried out to the conveyor belt 105 through the end box 5; S02. The granular catalyst is transported by the conveyor belt 105 from one end of the feed assembly of the box body 32 to one end of the discharge assembly, and is heated and dried by the heating rod 107 during the transportation process. 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 discharging process, the switching states of the seal assembly 7 of the receiving box 19 and the seal assembly 7 of the intermediate box 4 are as follows: The seal assembly 7 of the intermediate box 4 is closed, and the seal assembly 7 of the receiving box 19 is opened. The catalyst enters the intermediate box 4 through the receiving box 19. Then, the seal assembly 7 of the receiving box 19 is closed, and the seal assembly 7 of the intermediate box 4 is opened. The catalyst drops from the intermediate box 4 into the discharge box 20 and is discharged through the discharge port 2001 on the discharge box 20. After that, the seal assembly 7 of the intermediate box 4 is closed, and the built-in suction pipe 18 evacuates the intermediate box 4, and then the seal 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 body 32. The gas inside the box body 32 is extracted through the suction end block 21 and drawn into the inside of the condensation box 23. The gas evaporated from the catalyst is liquefied inside the condensation box 23, and the dry protective gas flows back into the box body 32 through the exhaust end block 26.

[0098] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present application pertains, various changes can be made 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 body (32), and a plurality of heating rods (107) are arranged at intervals along the material conveying direction inside the box body (32); The feeding assembly and the discharging assembly are respectively arranged at both ends of the box body (32), and are arranged corresponding to the upper and lower ends of the material conveying assembly (1) respectively; The feeding assembly includes a feeding box (2), an intermediate box (4), and a terminal box (5) that are connected in series from top to bottom. Sealing assemblies (7) are provided at the through connections between the feeding box (2) and the intermediate box (4) and between the intermediate box (4) and the terminal box (5). An internal suction pipe (18) is arranged inside the intermediate box (4), and the internal suction pipe (18) is connected to an external vacuum pipeline; The discharging assembly includes a material receiving box (19), an intermediate box (4), and a discharging box (20) that are connected in series from top to bottom. Sealing assemblies (7) are provided at the through connections between the material receiving box (19) and the intermediate box (4) and between the intermediate box (4) and the discharging box (20). An internal suction pipe (18) is arranged inside the intermediate box (4), and the internal suction pipe (18) is connected to an external vacuum pipeline; The protective gas circulation system includes a suction end block (21) and an 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 suction end block (21) and the exhaust end block (26). The condensation box (23) and the air pump (24) are arranged outside the box body (32).

2. The 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 sleeved on the rollers (102) together. One of the rollers (102) is coaxially connected to the output shaft of a driving motor (103); Anti - detachment frames (104) fixedly connected to the support frame (101) are provided at both ends of the upper conveyor belt (105). A plurality of triangular strips (106) are arranged at intervals along the moving direction of the top surface of the upper conveyor belt (105). Both ends of the triangular strips (106) are fixedly connected to the anti - detachment frames (104).

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

4. The catalyst rapid drying device according to any one of claims 1 to 3, characterized in that: In the feeding assembly, a connecting sleeve (6) is sleeved between the feeding box (2) and the intermediate box (4) and between the intermediate box (4) and the terminal box (5); In the discharging assembly, a connecting sleeve (6) is sleeved between the material receiving box (19) and the intermediate box (4) and between the intermediate box (4) and the discharging 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). The two ends of the sealing plate (701) are provided with frames (702). One end of the frame (702) is provided with a rotating shaft insertion hole (703), and the other end is provided with an extended sliding groove (704). A slider (707) is slidably arranged inside the extended sliding groove (704). A head (706) is rotatably connected above the slider (707). The 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 port of the first blanking 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 rotating shaft insertion hole (703) is rotatably connected to the feed box (2) through a rotating 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 first blanking channel (202); A sealing assembly (7) is provided at the port of the second blanking 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 rotating shaft insertion hole (703) is rotatably connected to the intermediate box (4) through a rotating 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 blanking channel (401); A sealing assembly (7) is provided at the port of the fourth blanking 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 rotating shaft insertion hole (703) is rotatably connected to the material receiving box (19) through a rotating 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 fourth blanking 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 upper and lower control air joints.

7. A catalyst rapid drying device according to claim 6, characterized in that: Both the feed assembly and the discharge assembly are externally connected with an air path control assembly. The air path control assembly includes a sub-control device (8) and an external high-pressure air pipe (13), a telescopic rod contraction control air pipe (14), a telescopic rod extension control air pipe (15), a vacuum pipe (16) and a connecting pipe (17) that are connected in a through manner with the sub-control device (8); The external high-pressure air pipe (13) is connected to an external high-pressure air 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 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 two second branch pipes (1501); The connecting pipe (17) is connected in a through manner with the built-in air extraction pipe (18).

8. A catalyst rapid drying device according to claim 7, characterized in that: The sub-control device (8) includes a valve body (801) and a cover plate (802) that are detachably connected; An air inlet cavity (803) connected to an external high-pressure air pipe (13) is provided inside the valve body (801). The air inlet cavity (803) is connected in a through manner to an extended control air cavity (804) and a contraction control air cavity (805) arranged at intervals. Two first branch air cavities (806) are connected in a through manner to the extended control air cavity (804). The first branch air cavity (806) is connected in a through manner to a telescopic rod extension control air pipe (15). Two second branch air cavities (809) are connected in a through manner to the contraction control air cavity (805). The second branch air cavity (809) is connected in a through manner to a telescopic rod contraction control air pipe (14); A through vacuum cavity (8013) is provided inside the valve body (801). Both ends of the vacuum cavity (8013) are connected in a through manner to a vacuum pipe (16) and a connecting pipe (17) respectively; Four valve rod moving holes (8012) are provided on the valve body (801). The plane where the axes of the valve rod moving holes (8012) are located is perpendicular to the plane where the axes of the first branch air cavity (806), the second branch air cavity (809), and the vacuum cavity (8013) are located; Two valve rod moving holes (8012) are connected in a through manner to two first branch air cavities (806). The other two valve rod moving holes (8012) are connected in a through manner to two second branch air cavities (809) and the vacuum cavity (8013); A telescopic rod extension control valve column (9) is provided inside the valve rod moving hole (8012) connected in a through manner to the first branch air cavity (806). A first through hole (904) that is cooperatively connected to the first branch air cavity (806) is provided on the first cylinder body (901) of the telescopic rod extension control valve column (9); A telescopic rod retraction control valve column (10) is provided inside the valve rod moving hole (8012) connected in a through manner to the second branch air cavity (809). A second through hole (1004) that is cooperatively connected to the second branch air cavity (809) and a third through hole (1006) that is cooperatively connected to the vacuum cavity (8013) are provided on the second cylinder body (1001) of the telescopic rod retraction control valve column (10); A control assembly for controlling the sliding of the telescopic rod extension control valve column (9) and the telescopic rod retraction control valve column (10) is provided outside the cover plate (802).

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

10. A method for drying a catalyst, according to a rapid catalyst drying device as claimed in claim 8, characterized in that, Including the following steps: 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 switching states of the sealing assemblies (7) of the feeding box (2) and the intermediate box (4) are as follows: The sealing assembly (7) of the intermediate box (4) is closed, and the sealing assembly (7) of the feeding box (2) is opened. The catalyst enters the intermediate box (4) through the feeding box (2). Then, the sealing assembly (7) of the feeding box (2) is closed, and the built-in suction pipe (18) evacuates the intermediate box (4). Then, the sealing assembly (7) of the intermediate box (4) is opened, and the catalyst drops from the intermediate box (4) into the end box (5). Then, continuous feeding is carried out to the conveyor belt (105) through the end box (5); S02. The granular catalyst is transported from one end of the feeding assembly of the box body (32) to one end of the discharging assembly by the conveyor belt (105) and is heated and dried by the heating rod (107) during the transportation process. The temperature of the heating rod (107) gradually increases from one end of the feeding assembly to one end of the discharging assembly; S03. The catalyst particles are discharged through the discharging assembly. During the discharging process, the switching states of the sealing assemblies (7) of the receiving box (19) and the intermediate box (4) are as follows: 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 drops from the intermediate box (4) into the discharging box (20) and is then discharged through the discharging port (2001) on the discharging box (20). After that, the sealing assembly (7) of the intermediate box (4) is closed The built-in suction pipe (18) evacuates 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 body (32). The gas inside the box body (32) is extracted through the suction end block (21) and drawn into the inside of the condensation box (23). The gas evaporated from the catalyst is liquefied inside the condensation box (23), and the dry protective gas flows back into the inside of the box body (32) through the exhaust end block (26).

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