A catalyst recycling device for fipronil technical product production

Abstract

The utility model discloses a fipronil technical production with catalyst recycling device relates to general physical or chemical method or device technical field. The fipronil technical production with catalyst recycling device, including primary solvent washing jar, the front side of primary solvent washing jar is installed with secondary water washing jar, the front side of secondary water washing jar is installed with vacuum low temperature drying jar, the front side of vacuum low temperature drying jar is installed with storage jar, and the installation of three spiral conveyors is between primary solvent washing jar, secondary water washing jar, vacuum low temperature drying jar, storage jar, and the electromagnetic valve is installed on the pipeline of vacuum low temperature drying jar front side and rear side and spiral conveyer connection, be provided with drying mechanism on vacuum low temperature drying jar, can adjust the height of stirring blade, and then can aim at the different accumulation height of catalyst in vacuum low temperature drying jar, distribution state dynamic adjustment stirring and discharge position, has improved catalyst drying's evenness and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of general physical or chemical methods or apparatus technology, specifically to a catalyst recycling device for the production of fipronil technical. Background Technology

[0002] Fipronil technical is the high-purity active ingredient raw material of fipronil insecticide. Unlike pesticide formulations that are directly used in the field, it is an indispensable core industrial raw material in the pesticide production process. It needs to be further processed to produce pesticide products that can be used in practice. The catalyst recycling device for fipronil technical production is an integrated industrial equipment. Its core function is to recover, purify and reuse the catalyst used in the production process through physical separation, chemical regeneration and other technical means, so as to reduce production costs and reduce environmental pollution.

[0003] Currently, in the industry, the stirring blades and discharge blades of common vacuum drying tanks are mostly fixed at a specific height of the rotating shaft. They cannot be adjusted according to the stacking height and distribution of the catalyst inside the tank. When the catalyst is stacked thickly, the upper layer of catalyst is prone to uneven heating because it cannot come into contact with the stirring, resulting in local over-drying or moisture residue. The lower layer of catalyst may clump due to long-term pressure, which not only affects the drying efficiency but also causes a large amount of catalyst to remain at the bottom of the tank when discharging, resulting in resource waste. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a catalyst recycling device for the production of fipronil technical, which has the function of adjusting the height of the stirring blades, thereby dynamically adjusting the stirring and discharge positions according to different stacking heights and distribution states of the catalyst in the vacuum low-temperature drying tank, improving the uniformity and efficiency of catalyst drying.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a catalyst recycling device for the production of fipronil technical, comprising a primary solvent washing tank, a secondary water washing tank installed in front of the primary solvent washing tank, a vacuum low-temperature drying tank installed in front of the secondary water washing tank, and a storage tank installed in front of the vacuum low-temperature drying tank. The lower sides of the primary solvent washing tank, the secondary water washing tank, the vacuum low-temperature drying tank, and the storage tank are all fixedly connected with support legs, and the rear side of the primary solvent washing tank is fixedly connected with a feed pipe. A discharge pipe is fixedly connected to the front of the storage tank. The inlet pipe and the discharge pipe are respectively connected to the interior of the primary solvent washing tank and the storage tank. The vacuum low-temperature drying tank is equipped with a drying mechanism, which can uniformly dry the catalyst inside the vacuum low-temperature drying tank. The drying mechanism includes a vacuum pump, heating ring, rotary motor assembly, limit rod, rotating shaft, stirring blades, discharge blades, limit rod groove, telescopic motor assembly, limit groove, connecting rod, limit block, and control panel.

[0006] Preferably, three screw conveyors are installed between the primary solvent washing tank, the secondary water washing tank, the vacuum low-temperature drying tank, and the storage tank; The three screw conveyors are connected to the pipelines on the primary solvent washing tank, the secondary water washing tank, the vacuum low-temperature drying tank, and the storage tank via flanges; The catalyst inside the primary solvent washing tank, the secondary water washing tank, and the vacuum low-temperature drying tank is conveyed forward by three screw conveyors. Solenoid valves are installed on the pipes connected to the screw conveyors on the front and rear sides of the vacuum low-temperature drying tank.

[0007] Preferably, spray pipes are fixedly connected to the upper side of both the primary solvent washing tank and the secondary water washing tank, and drain pipes are fixedly connected to the lower side of both the primary solvent washing tank and the secondary water washing tank. Two spray pipes and two drain pipes are respectively connected to the interior of the primary solvent washing tank and the secondary water washing tank.

[0008] Preferably, the vacuum pump is fixedly connected to the front side of the outer surface of the vacuum low-temperature drying tank, and the vacuum pump is connected to the inside of the vacuum low-temperature drying tank; The heating ring block is fixedly connected to the bottom wall of the vacuum low-temperature drying tank. The heating ring block has a circular structure. The rotary motor assembly is fixedly connected to the upper side of the vacuum low-temperature drying tank. The output shaft of the rotary motor assembly extends into the interior of the vacuum cryogenic drying chamber. A limiting rod is fixedly connected to the lower end of the output shaft of the rotary motor assembly. The limiting rod has a rectangular rod structure, and the rotating shaft is installed inside the vacuum cryogenic drying chamber.

[0009] Preferably, the rotating shaft is located at the lower side of the limiting rod, the stirring blade is fixedly connected to the outer surface of the rotating shaft, and the discharge blade is fixedly connected to the outer surface of the rotating shaft. The discharge blades are positioned below the mixing blades, and the limiting rod groove is located on the upper side of the rotating shaft. The limiting rod groove is a rectangular groove that is adapted to the limiting rod.

[0010] Preferably, the lower end of the limiting rod slides into the interior of the limiting rod groove, and the telescopic motor assembly is fixedly connected to the lower side of the vacuum low-temperature drying tank; The output end of the telescopic motor assembly is fixedly connected to a telescopic rod, and the upper end of the telescopic rod slides into the interior of the vacuum low-temperature drying tank. The limiting groove is located inside the rotating shaft. The limiting groove is cylindrical, and the connecting rod is fixedly connected to the upper end of the telescopic rod.

[0011] Preferably, the upper end of the connecting rod extends rotatably into the interior of the rotating shaft, and the upper end of the connecting rod extends rotatably into the interior of the limiting groove; The limiting block is fixedly connected to the upper end of the connecting rod, and the connecting rod is rotatably set inside the limiting groove. The control panel is fixedly connected to the left side of the outer surface of the vacuum low temperature drying tank.

[0012] Preferably, the stirring blade is replaced from a vertical shape to a "∠" shaped angled shape.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) The catalyst recycling device for the production of fipronil technical can adjust the height of the stirring blades, thereby dynamically adjusting the stirring and discharge positions according to the different stacking heights and distribution states of the catalyst in the vacuum low temperature drying tank, which improves the uniformity and efficiency of catalyst drying.

[0014] (2) The catalyst recycling device for the production of fipronil technical material has a first-stage solvent washing tank that removes most of the stubborn impurities on the catalyst surface by solvent spraying, and a second-stage water washing tank that removes residual solvent and soluble impurities by water spraying, forming a step-by-step purification of solvent to remove oil-soluble impurities and water to remove water-soluble impurities, which improves the purity of the catalyst. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of a catalyst recycling device for the production of fipronil technical grade according to this utility model; Figure 2 This is a schematic diagram of the connection structure on the right side of the catalyst recycling device of this utility model; Figure 3 This is a cross-sectional connection diagram of the vacuum low-temperature drying tank of this utility model; Figure 4 This is a cross-sectional connection diagram of the rotating shaft of this utility model; Figure 5 for Figure 4 Enlarged view of point A; Figure 6 This is a schematic diagram of the connection structure of the stirring blade of this utility model.

[0016] Reference numerals: 1. Primary solvent washing tank; 2. Secondary water washing tank; 3. Vacuum low-temperature drying tank; 4. Storage tank; 5. Support leg; 6. Feed pipe; 7. Discharge pipe; 8. Screw conveyor; 9. Spray pipe; 10. Drain pipe; 11. Vacuum pump; 12. Heating ring block; 13. Rotary motor assembly; 14. Limiting rod; 15. Rotating shaft; 16. Stirring blade; 17. Discharge blade; 18. Limiting rod groove; 19. Telescopic motor assembly; 20. Telescopic rod; 21. Limiting groove; 22. Connecting rod; 23. Limiting block; 24. Control panel. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Please see Figure 1-6 This utility model provides a new technical solution: a catalyst recycling device for the production of fipronil technical, comprising a primary solvent washing tank 1, serving as the initial washing site for the catalyst. The catalyst for the production of fipronil technical enters the tank through the feed pipe 6 at its rear, and the upper spray pipe 9 sprays solvent into the tank to perform preliminary washing of the incoming catalyst, removing most of the impurities attached to the catalyst surface. The waste liquid after washing is discharged through the lower drain pipe 10.

[0022] Secondary washing tank 2: This tank performs a secondary cleaning of the catalyst after primary solvent washing. The catalyst is conveyed to this tank via a screw conveyor 8 connected to the primary solvent washing tank 1. Water is sprayed into the tank from the upper spray pipe 9 to further remove residual impurities and solvents from the catalyst, improving its purity. The waste liquid after washing is discharged through the lower drain pipe 10.

[0023] Vacuum low-temperature drying tank 3: This tank is used for vacuum low-temperature drying of the catalyst after two-stage water washing. It is equipped with a drying mechanism that removes moisture and other volatile substances from the catalyst through a series of operations. After drying, the dried catalyst is discharged to storage tank 4 through a pipe connected to the screw conveyor 8 at the front.

[0024] Storage tank 4: Stores the catalyst after vacuum low-temperature drying. The discharge pipe 7 on its front side can discharge the treated catalyst from the device, completing the recycling of the catalyst.

[0025] Support leg 5: It is fixedly connected to the lower side of the primary solvent washing tank 1, the secondary water washing tank 2, the vacuum low temperature drying tank 3, and the storage tank 4 respectively, and plays the role of supporting the entire device to ensure the stability of the device.

[0026] Feed pipe 6: Fixedly connected to the rear side of the primary solvent washing tank 1 and connected to the interior of the primary solvent washing tank 1, used to transport the catalyst for the production of fipronil technical into the primary solvent washing tank 1 and start the catalyst recycling process.

[0027] Discharge pipe 7: Fixedly connected to the front side of storage tank 4 and connected to the inside of storage tank 4, used to discharge the processed catalyst from storage tank 4 to complete the entire catalyst recycling process.

[0028] Screw conveyor 8: There are three screw conveyors 8, which are installed between the primary solvent washing tank 1, the secondary water washing tank 2, the vacuum low temperature drying tank 3, and the storage tank 4. They are connected to the pipes on each tank through flanges. Their function is to transport the catalyst that has been washed by the primary solvent in the primary solvent washing tank 1 to the secondary water washing tank 2, to the secondary water washing tank 2 to the vacuum low temperature drying tank 3, and to the dried catalyst in the vacuum low temperature drying tank 3 to the storage tank 4.

[0029] Spray pipe 9: It is fixedly connected to the upper side of the primary solvent washing tank 1 and the secondary water washing tank 2 respectively, and is connected to the inside of the tank. It is used to spray solvent or water into the tank to perform preliminary washing of the catalyst entering the primary solvent washing tank 1 and secondary cleaning of the catalyst in the secondary water washing tank 2 respectively.

[0030] Drain pipe 10: It is fixedly connected to the lower side of the primary solvent washing tank 1 and the secondary water washing tank 2 respectively, and is connected to the inside of the tank. It is used to discharge the waste liquid after washing in the primary solvent washing tank 1 and the waste liquid after water washing in the secondary water washing tank 2.

[0031] Vacuum pump 11: Fixedly connected to the front side of the outer surface of the vacuum low-temperature drying tank 3, and connected to the interior of the vacuum low-temperature drying tank 3. Before the vacuuming operation, the two solenoid valves connected to the vacuum low-temperature drying tank 3 must be closed first, and then the vacuum pump 11 is started to evacuate the interior of the vacuum low-temperature drying tank 3 to a vacuum state, reduce the gas pressure inside the tank, and provide a suitable environment for subsequent low-temperature drying.

[0032] Heating ring 12: It is fixedly connected to the bottom wall of the vacuum low temperature drying tank 3 and has a circular structure. During the drying stage, the heating ring 12 starts to work and heats the catalyst in the tank, causing the water or other volatile substances in the catalyst to vaporize, thereby achieving the purpose of drying.

[0033] Rotary motor assembly 13: It is fixedly connected to the upper side of the vacuum low temperature drying tank 3. Its output shaft extends into the interior of the vacuum low temperature drying tank 3. After starting, the output shaft drives the limit rod 14 to rotate, which in turn drives the rotating shaft 15 to rotate, so that the stirring blades 16 on the outer surface of the rotating shaft 15 stir the catalyst, making the catalyst heat evenly and improving the drying efficiency.

[0034] Limiting rod 14: It is fixedly connected to the lower end of the output shaft of the rotary motor assembly 13. It is a rectangular rod structure. Its lower end slides into the limiting rod groove 18 on the upper side of the rotating shaft 15. The limiting rod 14 plays the role of transmitting power from the rotary motor assembly 13 to drive the rotating shaft 15 to rotate.

[0035] Rotating shaft 15: Installed inside the vacuum low temperature drying tank 3, located below the limit rod 14. Rotating under the action of the rotating motor assembly 13 and the limit rod 14, the rotating shaft 15 will drive the stirring blades 16 and the discharge blades 17 on its outer surface to rotate, respectively realizing the functions of stirring the catalyst and discharging the material.

[0036] Stirring blade 16: It is fixedly connected to the outer surface of the rotating shaft 15. When the rotating shaft 15 rotates, it stirs the catalyst in the vacuum low temperature drying tank 3. The stirring of the stirring blade 16 makes the catalyst heat evenly and improves the drying effect.

[0037] Discharge blade 17: Fixedly connected to the outer surface of the rotating shaft 15, and positioned below the stirring blade 16. When discharge is required after drying, the rotating shaft 15 drives the discharge blade 17 to rotate, and the dried catalyst inside the vacuum low temperature drying tank 3 is transported to the storage tank 4 via the screw conveyor 8.

[0038] Limiting rod groove 18: It is a rectangular groove formed on the upper side of the rotating shaft 15 and is adapted to the limiting rod 14. The lower end of the limiting rod 14 slides into the interior of the limiting rod groove 18. The limiting rod groove 18 can ensure that the limiting rod 14 can accurately drive the rotating shaft 15 to rotate.

[0039] Telescopic motor assembly 19: It is fixedly connected to the lower side of the vacuum low temperature drying tank 3. Its output end is fixedly connected to the telescopic rod 20. After starting, the output end drives the telescopic rod 20 to move up and down, thereby adjusting the vertical position of the rotating shaft 15 in the vacuum low temperature drying tank 3, so that the stirring blades 16 can stir the catalyst at different positions and ensure uniform drying effect.

[0040] Telescopic rod 20: The output end component of telescopic motor assembly 19, with its upper end sliding into the interior of vacuum low-temperature drying tank 3. The telescopic rod 20 moves up and down under the action of telescopic motor assembly 19, driving the connecting rod 22 to move up and down, thereby realizing the function of adjusting the position of rotating shaft 15.

[0041] Limiting groove 21: It is a cylindrical groove opened inside the rotating shaft 15. The upper end of the connecting rod 22 extends into the limiting groove 21 and cooperates with the limiting block 23 to ensure that the connecting rod 22 can drive the rotating shaft 15 to rotate and can move up and down under the action of the telescopic rod 20.

[0042] Connecting rod 22: It is fixedly connected to the upper end of the telescopic rod 20. The upper end extends rotatably into the interior of the rotating shaft 15 and the interior of the limiting groove 21. The upper end is fixedly connected to the limiting block 23. It moves up and down under the action of the telescopic rod 20, driving the rotating shaft 15 to move up and down.

[0043] Limiting block 23: It is fixedly connected to the upper end of the connecting rod 22 and rotatably set inside the limiting groove 21. It cooperates with the limiting groove 21 to ensure that the connecting rod 22 can accurately drive the rotating shaft 15 to rotate and can move up and down under the action of the telescopic rod 20.

[0044] Control panel 24: Fixedly connected to the left side of the outer surface of the vacuum low-temperature drying tank 3, serving as the control center of the entire device, it can precisely control the start-up, shutdown, and operating parameters of various components such as vacuum pump 11, heating ring block 12, rotary motor assembly 13, and telescopic motor assembly 19, ensuring that the device operates stably according to the preset program and conditions. At the same time, it collects and displays various key data during the operation of the device in real time, such as the vacuum degree, temperature, and stirring speed inside the vacuum low-temperature drying tank 3, so that operators can understand the working status of the device in a timely manner and make necessary adjustments and monitoring.

[0045] Furthermore, the catalyst for the production of fipronil technical enters the primary solvent washing tank 1 through the feed pipe 6 at the rear of the primary solvent washing tank 1. The spray pipe 9 on the upper side of the primary solvent washing tank 1 sprays solvent into the tank to perform preliminary washing of the catalyst. The waste liquid after washing is discharged through the drain pipe 10 at the lower side of the primary solvent washing tank 1. The catalyst after primary solvent washing is transported to the secondary water washing tank 2 through the screw conveyor 8 connected to the primary solvent washing tank 1 and the secondary water washing tank 2. The spray pipe 9 on the upper side of the secondary water washing tank 2 sprays water into the tank to perform secondary water washing of the catalyst to further remove impurities. The waste liquid after water washing is discharged through the drain pipe 10 at the lower side of the secondary water washing tank 2. The catalyst after secondary water washing is transported to the vacuum low-temperature drying tank 3 through the screw conveyor 8 connected to the secondary water washing tank 2 and the vacuum low-temperature drying tank 3, ready for drying treatment.

[0046] Before performing the vacuuming operation, the two solenoid valves on the pipes connecting the front and rear sides of the vacuum low-temperature drying tank 3 to the screw conveyor 8 must be closed to ensure that the vacuum low-temperature drying tank 3 is in a closed state, creating conditions for normal vacuuming. The control panel 24 controls the vacuum pump 11 on the outer surface of the front side of the vacuum low-temperature drying tank 3 to start, evacuating the inside of the vacuum low-temperature drying tank 3 into a vacuum state, reducing the gas pressure inside the tank, and providing a suitable environment for subsequent low-temperature drying. The control panel 24 controls the heating ring block 12 fixedly connected to the bottom wall of the vacuum low-temperature drying tank 3 to start working, heating the catalyst inside the tank, causing the water or other volatile substances in the catalyst to vaporize.

[0047] Control panel 24 starts the rotary motor assembly 13, whose output shaft drives the limiting rod 14 to rotate. Since the lower end of the limiting rod 14 slides into the limiting rod groove 18 on the upper side of the rotating shaft 15, the limiting rod 14 drives the rotating shaft 15 to rotate. The stirring blades 16 on the outer surface of the rotating shaft 15 rotate accordingly, stirring the catalyst and making the catalyst heat evenly, thus improving the drying efficiency. Control panel 24 starts the telescopic motor assembly 19, whose output end telescopic rod 20 moves up and down, driving the connecting rod 22 to move up and down. The limiting block 23 at the upper end of the connecting rod 22 rotates in the limiting groove 21 inside the rotating shaft 15, thereby adjusting the vertical position of the rotating shaft 15 in the vacuum low-temperature drying tank 3, so that the stirring blades 16 can stir the catalyst at different positions, ensuring uniform drying effect.

[0048] After drying, the control panel 24 controls the solenoid valve on the pipe connected to the screw conveyor 8 at the front of the vacuum low temperature drying tank 3 to open, and at the same time controls the discharge blades 17 on the outer surface of the rotating shaft 15 to rotate, so that the dried catalyst is transported to the storage tank 4 through the screw conveyor 8. When the catalyst is used again, the staff can use the treated catalyst discharge device through the discharge pipe 7 at the front of the storage tank 4.

[0049] Example: Replacing straight stirring blades with angled stirring blades Please see Figure 6 Replace the vertical shape of the stirring blade 16 with a "∠" shaped bend.

[0050] After the catalyst enters the vacuum low-temperature drying tank 3 through the feed pipe 6, the relevant valves at the tank opening are closed first, and the tank is evacuated to a vacuum state by the vacuum pump 11. Then, the rotary motor assembly 13 is started, and the stirring blades 16 rotate synchronously with the rotating shaft 15. The upper stirring blades 16 can break up the catalyst that is prone to clumping in the upper layer and push it to the middle layer. The middle stirring blades 16 are responsible for stirring the catalyst evenly, and the lower stirring blades 16 can turn the catalyst close to the heating ring 12 upward. At the same time, the telescopic motor assembly 19 drives the telescopic rod 20 to adjust the height of the rotating shaft 15 to ensure that the stirring blades 16 can completely cover the thick catalyst layer in the vacuum low-temperature drying tank 3. The heating ring 12 continues to heat to the temperature set by the control panel 24. After drying, the catalyst is assisted by the discharge blades 17 and transported to the storage tank 4 by the discharge pipe 7 or the screw conveyor 8.

[0051] The stirring blades 16 significantly improve the stirring coverage of the catalyst in the vacuum low-temperature drying tank 3, eliminating the phenomenon of stratification and agglomeration in the tank. The local overheating temperature difference of the catalyst around the heating ring block 12 is greatly reduced, and the catalyst activity retention rate after drying is significantly improved. When the catalyst is transported to the subsequent process for recycling in the synthesis of the active ingredient via the screw conveyor 8, the yield fluctuation is reduced and the stability is enhanced. The single batch catalyst processing capacity of the vacuum low-temperature drying tank 3 can meet the needs of the workshop's capacity expansion. There is no need to make additional adjustments to the core components of the drying mechanism, such as the rotary motor assembly 13 and the telescopic motor assembly 19. The efficiency improvement can be achieved simply by optimizing the structure of the stirring blades 16.

[0052] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A catalyst recycling device for the production of fipronil technical, comprising a primary solvent washing tank (1), a secondary water washing tank (2) installed in front of the primary solvent washing tank (1), a vacuum low-temperature drying tank (3) installed in front of the secondary water washing tank (2), and a storage tank (4) installed in front of the vacuum low-temperature drying tank (3). The lower sides of the primary solvent washing tank (1), the secondary water washing tank (2), the vacuum low temperature drying tank (3), and the storage tank (4) are all fixedly connected with support legs (5), and the rear side of the primary solvent washing tank (1) is fixedly connected with a feed pipe (6). A discharge pipe (7) is fixedly connected to the front side of the storage tank (4). The inlet pipe (6) and the discharge pipe (7) are respectively connected to the interior of the primary solvent washing tank (1) and the storage tank (4). The characteristic feature is that: The vacuum low-temperature drying tank (3) is equipped with a drying mechanism, which can uniformly dry the catalyst inside the vacuum low-temperature drying tank (3). The drying mechanism includes a vacuum pump (11), a heating ring (12), a rotary motor assembly (13), a limit rod (14), a rotating shaft (15), a stirring blade (16), a discharge blade (17), a limit rod groove (18), a telescopic motor assembly (19), a limit groove (21), a connecting rod (22), a limit block (23), and a control panel (24).

2. The catalyst recycling device for the production of fipronil technical according to claim 1, characterized in that: Three screw conveyors (8) are installed between the primary solvent washing tank (1), the secondary water washing tank (2), the vacuum low temperature drying tank (3), and the storage tank (4); The three screw conveyors (8) are connected to the pipes on the primary solvent washing tank (1), the secondary water washing tank (2), the vacuum low temperature drying tank (3), and the storage tank (4) by flanges; The catalyst inside the primary solvent washing tank (1), the secondary water washing tank (2), and the vacuum low temperature drying tank (3) is conveyed forward by three screw conveyors (8). Solenoid valves are installed on the pipes connected to the screw conveyors (8) on the front and rear sides of the vacuum low temperature drying tank (3).

3. The catalyst recycling device for the production of fipronil technical according to claim 1, characterized in that: Spray pipes (9) are fixedly connected to the upper side of the primary solvent washing tank (1) and the secondary water washing tank (2), and drain pipes (10) are fixedly connected to the lower side of the primary solvent washing tank (1) and the secondary water washing tank (2). Two spray pipes (9) and two drain pipes (10) are connected to the interior of the primary solvent washing tank (1) and the secondary water washing tank (2), respectively.

4. The catalyst recycling device for the production of fipronil technical according to claim 1, characterized in that: The vacuum pump (11) is fixedly connected to the front side of the outer surface of the vacuum low temperature drying tank (3), and the vacuum pump (11) is connected to the inside of the vacuum low temperature drying tank (3); The heating ring block (12) is fixedly connected to the bottom wall of the vacuum low temperature drying tank (3). The heating ring block (12) has a circular structure. The rotary motor assembly (13) is fixedly connected to the upper side of the vacuum low temperature drying tank (3). The output shaft of the rotary motor assembly (13) extends into the interior of the vacuum low-temperature drying tank (3). The limiting rod (14) is fixedly connected to the lower end of the output shaft of the rotary motor assembly (13). The limiting rod (14) is a rectangular rod structure. The rotating shaft (15) is installed inside the vacuum low-temperature drying tank (3).

5. A catalyst recycling device for the production of fipronil technical grade according to claim 4, characterized in that: The rotating shaft (15) is located at the lower side of the limiting rod (14), the stirring blade (16) is fixedly connected to the outer surface of the rotating shaft (15), and the discharge blade (17) is fixedly connected to the outer surface of the rotating shaft (15). The discharge blade (17) is located on the lower side of the stirring blade (16), and the limiting rod groove (18) is opened on the upper side of the rotating shaft (15). The limiting rod groove (18) is a rectangular groove that is adapted to the limiting rod (14).

6. The catalyst recycling device for the production of fipronil technical according to claim 4, characterized in that: The lower end of the limiting rod (14) slides into the interior of the limiting rod groove (18), and the telescopic motor assembly (19) is fixedly connected to the lower side of the vacuum low temperature drying tank (3). The output end of the telescopic motor assembly (19) is fixedly connected to a telescopic rod (20), and the upper end of the telescopic rod (20) slides into the interior of the vacuum low temperature drying tank (3); The limiting groove (21) is opened inside the rotating shaft (15). The limiting groove (21) is a cylindrical groove. The connecting rod (22) is fixedly connected to the upper end of the telescopic rod (20).

7. A catalyst recycling device for the production of fipronil technical grade according to claim 6, characterized in that: The upper end of the connecting rod (22) extends rotatably into the interior of the rotating shaft (15), and the upper end of the connecting rod (22) extends rotatably into the interior of the limiting groove (21); The limiting block (23) is fixedly connected to the upper end of the connecting rod (22), the connecting rod (22) is rotatably set inside the limiting groove (21), and the control panel (24) is fixedly connected to the left side of the outer surface of the vacuum low temperature drying tank (3).

8. A catalyst recycling device for the production of fipronil technical grade according to claim 5, characterized in that: The stirring blade (16) is replaced from a vertical shape to a "∠" shaped bend.

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