Preparation method and device of fluopicolide

Abstract

The invention provides a fluopicolide preparation method and a fluopicolide preparation device, and relates to the technical field of pesticide bactericide production. A first feeding pipe and a second feeding pipe are mounted at the left end of the first reaction tank, and the right end of the first reaction tank is connected with a second reaction tank through a first discharging pipe; raw materials participating in the reaction are cheap and easy to obtain, the product quality and yield stability are high, the reaction conditions are mild, and the device and the preparation method are suitable for large-scale production in workshops; when the device discharges, powder adhered to the inner wall of the drying tank is automatically scraped and cleaned, so that the device has better cleaning and using effects and better maintenance efficiency; the problems that multiple chemical substances need to be introduced to participate in the reaction, the reaction process is complex, later impurity removal and purification are not facilitated, the production cost is relatively high, the reaction speed is slow, the reaction effect is poor, and the device and the preparation method are not suitable for large-scale production in workshops are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide fungicide production, and in particular to a preparation method of fluopyram and a device thereof. Background Art

[0002] Fluopyram is a benzamide fungicide with protective and broad-spectrum therapeutic effects. It is mainly used on grapes and various vegetables. It has outstanding preventive effects on common oomycete diseases such as downy mildew, blight, late blight, and damping-off. The drug has good protection and strong permeability, has high biological activity against oomycete diseases, and has a good preventive and control effect. It provides reliable protection for vegetable disease prevention in the rainy season. Overall, its protective potential is more prominent, and it is an ideal oomycete fungicide.

[0003] For example, patent CN115784976A discloses a method for preparing fluopyram, which comprises the following steps: adding 2-aminomethyl-3-chloro-5-trifluoromethylpyridinium salt and 2,6-dichlorobenzaldehyde to an organic solvent to obtain a 2-aminomethyl-3-chloro-5-trifluoromethylpyridinium salt organic solution, adding a base, a catalyst, an ionic liquid and an oxidant to the obtained organic solution, and mixing them uniformly to form a reaction system for reaction, thereby finally obtaining fluopyram.

[0004] For example, patent CN116924974A discloses a method for preparing fluopyram, which comprises adding 2-aminomethyl-3-chloro-5-trifluoromethylpyridinium salt and 2,6-dichlorobenzoic acid into a solvent, and then adding a base and a catalyst to heat the reaction to obtain fluopyram.

[0005] As for the existing preparation method and device of fluopyram, the reaction process of patent CN115784976A needs to introduce multiple chemical substances to participate in the reaction, the reaction process is complicated, which is not conducive to the subsequent impurity removal and purification, and the production cost is relatively high. The carboxyl group on the 2,6-dichlorobenzoic acid in patent CN116924974A does not have good activation performance, and the amino group on the 2-aminomethyl-3-chloro-5-trifluoromethylpyridinium salt is extremely weak in activity when condensing with the carboxyl group on the 2,6-dichlorobenzoic acid, the reaction speed is slow, and the reaction effect is poor; the selected catalyst is expensive, the production cost is high, and it is not suitable for large-scale production in a workshop. Summary of the invention

[0006] The disclosed embodiments relate to a method for preparing fluopyram and a device thereof. The raw materials involved in the reaction of the device and the preparation method are cheap and readily available, the product quality and yield are highly stable, the reaction conditions are mild, and the device is suitable for large-scale production in a workshop. When the device discharges the material, the powder adhered to the inner wall of the drying tank is automatically scraped and cleaned, so that the device has better cleaning and use effects, and the scraper seat of the device is convenient and quick to disassemble and assemble, and has better maintenance efficiency.

[0007] In a first aspect, the present disclosure provides a method for preparing fluopyram and a device thereof, which specifically comprises: a first reaction tank; The first reaction tank is provided with a first feeding pipe and a second feeding pipe at the left end, the first reaction tank is connected with the second reaction tank through the first discharging pipe at the right end, the first reaction tank and the second reaction tank are both provided with a stirrer and a heater, the second reaction tank is externally connected with a three-stage water washing tank, the three-stage water washing tank is connected with a drying tank through a nozzle, a sprayer is provided at the outer end of the nozzle, and the sprayer is placed at the top end of the drying tank, a group of moving frames are slidably provided at the bottom of the drying tank, a baffle is fixedly provided on the moving frames, a group of rotating shafts and a group of scraping seats are rotatably provided at the bottom of the drying tank, the bottom of the scraping seat is meshed with the rotating shaft to transmit The outer end of the rotating shaft is meshed with the outer end of the movable frame for transmission connection. A group of limit blocks are also slidably installed on the side end of the drying tank. A group of limit ring grooves are opened on the scraper seat, and the limit blocks are clamped and installed on the limit ring grooves on the scraper seat. A scraper is installed on the top of the scraper seat, and the inner end of the scraper is in contact with the inner wall of the drying tank. A group of condensers are installed on the outer end of the drying tank through the bag filter and the pump body. An air outlet pipe is installed on the top of the condenser, and a liquid outlet pipe is installed at the bottom of the condenser. A heating pipe is also installed on the left end of the drying tank, a filter is installed on the outer end of the heating pipe, and an air heater and an air pump are installed on the inner end of the filter.

[0008] In at least some embodiments, a group of first elastic members are respectively sleeved and installed on the two groups of connecting rods at the outer end of the movable frame, and the outer ends of the first elastic members are respectively in contact with the inner end surface of the connecting plate on the drying tank.

[0009] In at least some embodiments, a group of external plates are fixedly installed on the bottom of the drying tank, a group of sliding holes are opened on the external plates, a group of external rods are fixedly installed on the outer end of the limit block, and the external rods at the outer end of the limit block are slidably installed on the sliding holes of the external plates at the bottom of the drying tank.

[0010] In at least some embodiments, the washing in the three-stage water washing tank is divided into primary acid washing, secondary water washing and tertiary water washing; the acid washing temperature is 65±5°C, pH≤2, and the water washing temperature is 65±5°C; the temperature of the first reaction tank is 20~30°C, the temperature of the second reaction tank is 30~40°C, and the air heater heats the air to 80°C~100°C.

[0011] In at least some embodiments, a group of mounting grooves are opened on the side end of the scraper seat, a group of mounting blocks are fixedly connected to the bottom of the scraper, and the mounting blocks at the bottom of the scraper are fixedly mounted on the mounting grooves on the side end of the scraper seat by bolts.

[0012] In at least some embodiments, a group of first gears are fixedly mounted on the rotating shaft, a group of driving gear rings are fixedly mounted on the outer end of the scraper seat, and the first gears on the rotating shaft are meshed and transmission-connected with the driving gear rings on the outer end of the scraper seat.

[0013] In at least some embodiments, a connecting plate is fixedly installed at the bottom of the drying tank, two sets of sliding holes are opened on the connecting plate, two sets of connecting rods are fixedly installed at the outer end of the movable frame, and the connecting rods at the outer end of the movable frame are respectively slidably installed on the sliding holes of the connecting plate at the bottom of the drying tank.

[0014] In at least some embodiments, a group of second elastic members are sleeved and mounted on the external connecting rod at the outer end of the limit block, and the outer ends of the second elastic members are in contact with the inner end surface of the external connecting plate on the drying tank.

[0015] In at least some embodiments, a set of racks are fixedly mounted on the outer end of the movable frame, a set of second gears are fixedly mounted on the bottom of the rotating shaft, and the racks on the outer end of the movable frame are meshed and transmission-connected with the second gears at the bottom of the rotating shaft.

[0016] A method for preparing fluopyram, comprising the following steps: 1) Add 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt and 2,6-dichlorobenzoyl chloride in a molar ratio of 1:1.05-1.1 to dichloroethane, and add softened water to 32% liquid caustic soda in a molar ratio of pyridinium salt to alkali of 1:2.20-2.25 to prepare 10% liquid caustic soda, and react in the first reaction tank and the second reaction tank until the analysis tracking of 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt is ≤0.1%, the reaction is completed; 2) The material enters the three-stage water washing tank and is washed with water until it is neutral. After washing, the organic layer is sprayed into the drying tank through the sprayer. The air is filtered by the filter and then pumped into the air heater by the air pump to be heated to 80℃~100℃. The heated air is used as a heat source to dry the atomized organic layer. The solvent in the organic layer is directly vaporized after contacting with the hot air, filtered by the bag filter, pumped to the condenser by the pump body for condensation and then recovered for application. The solute is dried into powder or granular products and placed under the drying tank. 3) Pull the movable frame outward to drive the scraper seat to rotate through the rotating shaft, so that the device can automatically scrape and clean the powder adhering to the inner wall of the drying tank when discharging.

[0017] The present invention provides a method for preparing fluopyram and a device thereof, which have the following beneficial effects: The raw materials involved in the reaction of the device and the preparation method of the present invention are cheap and easy to obtain, the reaction device and operation are relatively simple, the reaction process is concise, the product quality and yield are stable, the reaction conditions are mild, the obtained raw powder content is 98.6%, the yield is 98.1%, and it is suitable for workshop-scale production; when the device discharges the material, the powder adhered to the inner wall of the drying tank is automatically scraped and cleaned, so that the device has better cleaning and use effects, and the scraper seat of the device is convenient and quick to disassemble and assemble, and has better maintenance efficiency.

[0018] In addition, the connecting rods at the outer end of the movable frame are slidably installed on the sliding holes of the connecting plate at the bottom of the drying tank. After the solute is dried into a powdery or granular product to the bottom of the drying tank, the movable frame is pulled outward, and the rack at the outer end of the movable frame is meshed and connected with the second gear at the bottom of the rotating shaft. The first gear on the rotating shaft is meshed and connected with the driving gear ring at the outer end of the scraper seat, so that the scraper seat is driven to rotate through the rotating shaft, so that the device can automatically scrape and clean the powder adhered to the inner wall of the drying tank when discharging the material, so that the device has better cleaning and use effects.

[0019] In addition, the external connecting rod at the outer end of the limit block is slidably installed on the sliding hole of the external connecting plate at the bottom of the drying tank, the limit block is pulled outward, and the scraper seat is plugged into the bottom of the drying tank. After the scraper seat moves to a fixed position, the limit block is released, and under the action of the second elastic member on the external connecting rod, the limit block moves inward, and the limit block is clamped and installed on the limit ring groove on the scraper seat. A scraper is installed on the top of the scraper seat, and the mounting block at the bottom of the scraper is fixed to the mounting groove at the side end of the scraper seat by bolts, so that the scraper seat of the device is convenient and quick to disassemble and assemble, and has better maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0021] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0022] In the attached picture: Figure 1 It is a front axial schematic diagram of the preparation method of fluopyram and the device thereof of the present invention.

[0023] Figure 2 It is a rear axial schematic diagram of the preparation method of fluopyram and the device thereof of the present invention.

[0024] Figure 3 It is a schematic diagram of the interior of a drying tank of the method for preparing fluopyram and the device thereof of the present invention.

[0025] Figure 4 The present invention is a schematic diagram of disassembling and assembling a mobile frame of the method for preparing fluopyram and the device thereof.

[0026] Figure 5 The invention discloses a method for preparing fluopyram and a schematic diagram of the installation of a scraper seat of the device thereof.

[0027] Figure 6 The present invention is a partial cross-sectional schematic diagram of the bottom of a drying tank of the method for preparing fluopyram and the device thereof.

[0028] Figure 7The invention discloses a cross-sectional schematic diagram of a scraper seat of a method for preparing fluopyram and a device thereof.

[0029] Reference numerals list 1. First reaction tank; 101. First feed pipe; 102. Second feed pipe; 103. First discharge pipe; 104. Agitator; 105. Second reaction tank; 2. Third-stage water washing tank; 3. Drying tank; 301. Connecting plate; 302. Moving frame; 3021. Connecting rod; 3022. First elastic member; 3023. Rack; 3024. Baffle; 303. Rotating shaft; 3031. First gear; 3032. Second gear; 304. External Connecting plate; 305, limiting block; 3051, external connecting rod; 3052, second elastic member; 306, sprayer; 4, scraper seat; 401, limiting ring groove; 402, driving gear ring; 403, mounting groove; 404, scraper; 4041, mounting block; 5, condenser; 501, air outlet pipe; 502, liquid outlet pipe; 503, bag filter; 504, pump body; 6, heating pipe fittings; 601, filter; 602, air heater; 603, air pump. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1 to 7 As shown: The present invention provides a method for preparing fluopyram and a device thereof, comprising a first reaction tank 1; The first reaction tank 1 is provided with a first feed pipe 101 and a second feed pipe 102 at the left end, and the second reaction tank 1 is connected with a second reaction tank 105 via a first discharge pipe 103 at the right end. A stirrer 104 and a heater are installed on the first reaction tank 1 and the second reaction tank 105. The second reaction tank 105 is externally connected with a three-stage water washing tank 2, and the three-stage water washing tank 2 is connected with a drying tank 3 via a nozzle. A sprayer 306 is installed at the outer end of the nozzle, and the sprayer 306 is placed at the top of the drying tank 3. A group of movable frames 302 are slidably installed at the bottom of the drying tank 3, and a baffle 3024 is fixedly installed on the movable frame 302. A group of rotating shafts 303 and a group of scraper seats 4 are also rotatably installed at the bottom of the drying tank 3, and the bottom of the scraper seat 4 is meshed and transmission-connected with the rotating shaft 303. The outer end of the rotating shaft 303 is meshed and transmission-connected with the outer end of the movable frame 302, a group of limit blocks 305 are also slidably installed on the side end of the drying tank 3, a group of limit ring grooves 401 are opened on the scraper seat 4, and the limit blocks 305 are snap-fitted and installed on the limit ring grooves 401 on the scraper seat 4, a scraper 404 is installed on the top of the scraper seat 4, and the inner end of the scraper 404 is in contact with the inner wall of the drying tank 3, and a group of condensers 5 are installed on the outer end of the drying tank 3 through the bag filter 503 and the pump body 504, an air outlet pipe 501 is installed on the top of the condenser 5, and a liquid outlet pipe 502 is installed at the bottom of the condenser 5, and a heating pipe 6 is also installed on the left end of the drying tank 3, a filter 601 is installed on the outer end of the heating pipe 6, and an air heater 602 and an air pump 603 are installed on the inner end of the filter 601.

[0032] The washing of the three-stage washing tank 2 is divided into primary acid washing, secondary water washing and tertiary water washing; the acid washing temperature is 65±5℃, pH≤2, and the water washing temperature is 65±5℃; the temperature of the first reaction tank 1 is 20~30℃, the temperature of the second reaction tank 105 is 30~40℃, and the air heater 602 heats the air to 80℃~100℃; the specific function, the raw materials involved in the reaction of the device and its preparation method are cheap and easy to obtain, the reaction device and operation are relatively simple, the reaction process is simple, the product quality and yield are highly stable, the reaction conditions are mild, the obtained raw powder content is 98.6%, and the yield is 98.1%, which is suitable for workshop-scale production.

[0033] In the embodiments of the present disclosure, Figures 3 to 5As shown, a connecting plate 301 is fixedly installed at the bottom of the drying tank 3, and two groups of sliding holes are opened on the connecting plate 301. Two groups of connecting rods 3021 are fixedly installed on the outer end of the moving frame 302, and the connecting rods 3021 at the outer end of the moving frame 302 are respectively slidably installed on the sliding holes of the connecting plate 301 at the bottom of the drying tank 3. A group of first elastic members 3022 are respectively sleeved and installed on the two groups of connecting rods 3021 at the outer end of the moving frame 302, and the outer ends of the first elastic members 3022 are respectively in contact with the inner end surfaces of the connecting plate 301 on the drying tank 3. A group of racks 3023 are fixedly installed on the outer end of the moving frame 302, and a group of second gears 3032 are fixedly installed at the bottom of the rotating shaft 303, and the racks 3023 at the outer end of the moving frame 302 are meshed and transmission-connected with the second gears 3032 at the bottom of the rotating shaft 303. A group of first gears 3032 are also fixedly installed on the rotating shaft 303. 031, a group of driving gear rings 402 are fixedly installed on the outer end of the scraper seat 4, and the first gear 3031 on the rotating shaft 303 is meshed and connected with the driving gear ring 402 at the outer end of the scraper seat 4; specifically, the connecting rods 3021 at the outer end of the movable frame 302 are slidably installed on the sliding holes of the connecting plate 301 at the bottom of the drying tank 3, and after the solute is dried into a powdery or granular product to the bottom of the drying tank 3, the movable frame 302 is pulled outward, and the rack 3023 at the outer end of the movable frame 302 is meshed and connected with the second gear 3032 at the bottom of the rotating shaft 303, and the first gear 3031 on the rotating shaft 303 is meshed and connected with the driving gear ring 402 at the outer end of the scraper seat 4, so as to drive the scraper seat 4 to rotate through the rotating shaft 303, so that the device can automatically scrape and clean the powder adhered to the inner wall of the drying tank 3 when discharging, so that the device has better cleaning and use effects.

[0034] Embodiment 2: Based on Embodiment 1, wherein Figure 6 and Figure 7As shown, a group of external plates 304 are fixedly installed at the bottom of the drying tank 3, and a group of sliding holes are opened on the external plates 304. A group of external rods 3051 are fixedly installed on the outer ends of the limit blocks 305, and the external rods 3051 at the outer ends of the limit blocks 305 are slidably installed on the sliding holes of the external plates 304 at the bottom of the drying tank 3. A group of second elastic members 3052 are sleeved and installed on the external rods 3051 at the outer ends of the limit blocks 305, and the outer ends of the second elastic members 3052 are in contact with the inner end surfaces of the external plates 304 on the drying tank 3. A group of mounting grooves 403 are opened at the side ends of the scraper seat 4, and a group of mounting blocks 4041 are fixedly connected to the bottom of the scraper 404, and the mounting blocks 4041 at the bottom of the scraper 404 are fixedly installed on the side ends of the scraper seat 4 by bolts. The outer connecting rod 3051 at the outer end of the limit block 305 is slidably installed on the sliding hole of the external connecting plate 304 at the bottom of the drying tank 3, and the limit block 305 is pulled outward to insert the scraper seat 4 into the bottom of the drying tank 3. After the scraper seat 4 moves to a fixed position, the limit block 305 is released, and under the action of the second elastic member 3052 on the external connecting rod 3051, the limit block 305 moves inward, and the limit block 305 is clamped and installed on the limit ring groove 401 on the scraper seat 4. A scraper 404 is installed on the top of the scraper seat 4, and the mounting block 4041 at the bottom of the scraper 404 is fixedly installed in the mounting groove 403 at the side end of the scraper seat 4 by bolts, so that the scraper seat 4 of the device is convenient for quick disassembly and assembly, and has better maintenance efficiency.

[0035] A method for preparing fluopyram, comprising the following steps: 1) 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt and 2,6-dichlorobenzoyl chloride are added to dichloroethane in a molar ratio of 1:1.05-1.1, and softened water is added to 32% liquid caustic soda in a molar ratio of pyridinium salt to alkali of 1:2.20-2.25 to prepare 10% liquid caustic soda, and the reaction is carried out in the first reaction tank 1 and the second reaction tank 105. The reaction is completed when the analysis tracking of 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt is ≤0.1%; 2) The material enters the tertiary washing tank 2 and is washed with water until it is neutral. After washing, the organic layer is sprayed into the drying tank 3 through the sprayer 306. The air is filtered by the filter 601 and then pumped into the air heater 602 by the air pump 603 to be heated to 80°C~100°C. The heated air is used as a heat source to dry the atomized organic layer. The solvent in the organic layer is directly vaporized after contacting with the hot air, filtered by the bag filter 503, and then pumped to the condenser 5 by the pump body 504 for condensation and recycling. The solute is dried into a powder or granular product and placed below the drying tank 3. 3) Pull the movable frame 302 outward to drive the scraper seat 4 to rotate through the rotating shaft 303, so that the device can automatically scrape and clean the powder adhering to the inner wall of the drying tank 3 when discharging the material.

[0036] Specific usage and function of this embodiment: In the present invention, after the solute is dried into a powdery or granular product to the bottom of the drying tank 3, the movable frame 302 is pulled outward, and the rack 3023 at the outer end of the movable frame 302 is meshed and connected with the second gear 3032 at the bottom of the rotating shaft 303, and the first gear 3031 on the rotating shaft 303 is meshed and connected with the driving gear ring 402 at the outer end of the scraper seat 4, so that the scraper seat 4 is driven to rotate through the rotating shaft 303, so that the device automatically scrapes and cleans the powder adhered to the inner wall of the drying tank 3 when discharging, and the limit block 305 is pulled outward to insert the scraper seat 4 into the bottom of the drying tank 3. After the scraper seat 4 moves to a fixed position, the limit block 305 is released. 5. Under the action of the second elastic member 3052 on the external rod 3051, the limit block 305 moves inward, and the limit block 305 is clamped and installed on the limit ring groove 401 on the scraper seat 4. A scraper 404 is installed on the top of the scraper seat 4. The mounting block 4041 at the bottom of the scraper 404 is fixedly installed in the mounting groove 403 at the side end of the scraper seat 4 by bolts, so that the scraper seat 4 of the device is convenient and quick to disassemble and assemble. The raw materials involved in the reaction of the device and the preparation method thereof are cheap and easy to obtain, the reaction device and operation are relatively simple, the reaction process is simple, the product quality and yield are stable, the reaction conditions are mild, the obtained raw powder content is 98.6%, and the yield is 98.1%, which is suitable for large-scale production in workshops.

Claims

1. A preparation device for fluopyram, characterized in that: It includes a first reaction tank (1); The first reaction tank (1) is provided with a first feed pipe (101) and a second feed pipe (102) at the left end thereof, the first reaction tank (1) is connected to the second reaction tank (105) at the right end thereof via a first discharge pipe (103), the first reaction tank (1) and the second reaction tank (105) are both provided with a stirrer (104) and a heater, the second reaction tank (105) is externally connected to a three-stage water washing tank (2), the three-stage water washing tank (2) is connected to a drying tank (3) via a nozzle, a sprayer (306) is provided at the outer end of the nozzle, and the sprayer (306) is placed at the top end of the drying tank (3), a group of movable frames (302) are slidably provided at the bottom of the drying tank (3), a baffle (3024) is fixedly provided on the movable frames (302), a group of rotating shafts (303) and a group of scraping seats (4) are rotatably provided at the bottom of the drying tank (3), the bottom of the scraping seats (4) is meshed and transmission-connected with the rotating shaft (303), and the rotating shaft (303) is provided at the bottom of the scraping seats (4). The outer end of the (303) is meshed and transmission-connected with the outer end of the movable frame (302); a group of limit blocks (305) are slidably mounted on the side end of the drying tank (3); a group of limit ring grooves (401) are opened on the scraper seat (4); and the limit blocks (305) are snap-fitted and mounted on the limit ring grooves (401) on the scraper seat (4); a scraper (404) is mounted on the top of the scraper seat (4); and the inner end of the scraper (404) is in contact with the inner wall of the drying tank (3); and the drying tank (3) is moved in a direction of rotation. (3) A condenser (5) is installed at the outer end through the bag filter (503) and the pump body (504), an air outlet pipe (501) is installed at the top of the condenser (5), and a liquid outlet pipe (502) is installed at the bottom of the condenser (5). A heating pipe (6) is also installed at the left end of the drying tank (3), a filter (601) is installed at the outer end of the heating pipe (6), and an air heater (602) and an air pump (603) are installed at the inner end of the filter (601).

2. A preparation device for fluopyram according to claim 1, characterized in that: The washing in the three-stage water washing tank (2) is divided into primary acid washing, secondary water washing and tertiary water washing; the acid washing temperature is 65±5°C, pH≤2, and the water washing temperature is 65±5°C; the temperature of the first reaction tank (1) is 20~30°C, the temperature of the second reaction tank (105) is 30~40°C, and the air heater (602) heats the air to 80°C~100°C.

3. A preparation device for fluopyram according to claim 1, characterized in that: A connecting plate (301) is fixedly mounted on the bottom of the drying tank (3), and two groups of sliding holes are opened on the connecting plate (301). Two groups of connecting rods (3021) are fixedly mounted on the outer end of the moving frame (302), and the connecting rods (3021) on the outer end of the moving frame (302) are respectively slidably mounted on the sliding holes of the connecting plate (301) at the bottom of the drying tank (3).

4. A preparation device for fluopyram according to claim 3, characterized in that: A group of first elastic members (3022) are respectively sleeved and installed on the two groups of connecting rods (3021) at the outer ends of the movable frame (302), and the outer ends of the first elastic members (3022) are respectively in contact with the inner end surfaces of the connecting plates (301) on the drying tank (3).

5. The device for preparing fluopyram according to claim 1, characterized in that: A set of racks (3023) are fixedly mounted on the outer end of the moving frame (302), a set of second gears (3032) are fixedly mounted on the bottom of the rotating shaft (303), and the racks (3023) on the outer end of the moving frame (302) are meshed and transmission-connected with the second gears (3032) at the bottom of the rotating shaft (303).

6. The device for preparing fluopyram according to claim 1, characterized in that: A group of first gears (3031) are fixedly mounted on the rotating shaft (303), a group of driving gear rings (402) are fixedly mounted on the outer end of the scraper seat (4), and the first gears (3031) on the rotating shaft (303) are meshed and transmission-connected with the driving gear rings (402) on the outer end of the scraper seat (4).

7. The device for preparing fluopyram according to claim 1, characterized in that: A group of external connecting plates (304) are fixedly mounted on the bottom of the drying tank (3), a group of sliding holes are opened on the external connecting plates (304), a group of external connecting rods (3051) are fixedly mounted on the outer ends of the limiting blocks (305), and the external connecting rods (3051) at the outer ends of the limiting blocks (305) are slidably mounted on the sliding holes of the external connecting plates (304) at the bottom of the drying tank (3).

8. The device for preparing fluopyram according to claim 7, characterized in that: A group of second elastic members (3052) is sleeved and mounted on the external connecting rod (3051) at the outer end of the limit block (305), and the outer ends of the second elastic members (3052) are in contact with the inner end surface of the external connecting plate (304) on the drying tank (3).

9. The device for preparing fluopyram according to claim 1, characterized in that: A group of mounting grooves (403) are formed at the side ends of the scraper seat (4), a group of mounting blocks (4041) are fixedly connected to the bottom of the scraper plate (404), and the mounting blocks (4041) at the bottom of the scraper plate (404) are fixedly mounted on the mounting grooves (403) at the side ends of the scraper seat (4) by means of bolts.

10. A method for preparing a fluopyram preparation device according to any one of claims 1 to 9, comprising the following steps: 1) adding 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt and 2,6-dichlorobenzoyl chloride to dichloroethane, wherein the molar ratio of the 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt to the 2,6-dichlorobenzoyl chloride is 1:1.05-1.1, and adding softened water to 32% liquid caustic soda to prepare 10% liquid caustic soda, wherein the molar ratio of the pyridinium salt to the alkali in the 32% liquid caustic soda is 1:2.20-2.25, and reacting in a first reaction tank (1) and a second reaction tank (105), and reacting until the analysis tracking of the 3-chloro-2-methylamino-5-trifluoromethylpyridinium salt is ≤0.1%, the reaction is terminated; 2) The material enters the third-stage water washing tank (2) and is washed with water until it is neutral. After washing, the organic layer is sprayed into the drying tank (3) through the sprayer (306). The air is filtered through the filter (601) and then pumped into the air heater (602) by the air pump (603) and heated to 80°C~100°C. The heated air is used as a heat source to dry the atomized organic layer. The solvent in the organic layer is directly vaporized after contacting with the hot air. After being filtered by the bag filter (503), it is pumped by the pump body (504) to the condenser (5) for condensation and recovery. The solute is dried into a powder or granular product and placed below the drying tank (3); 3) Pulling the movable frame (302) outwards, driving the scraper seat (4) to rotate via the rotating shaft (303), so that the device can automatically scrape and clean the powder adhering to the inner wall of the drying tank (3) when discharging the material.

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