Pyroxasulfone production device

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses a pyroxasulfone production device which comprises a hydrogen peroxide head tank, a synthesis kettle, a washing kettle and a centrifugal machine which are sequentially communicated through pipelines, valves and pumps, the synthesis kettle is provided with a solid material inlet and a liquid material inlet, and the liquid material inlet is communicated with a hydrogen peroxide head tank arranged on the synthesis kettle through a pipeline and a valve; the synthesis kettle is also communicated with a condenser, and the condenser and the synthesis kettle form a circulation loop (for circularly cooling materials in the synthesis kettle); the synthesis kettle is arranged above the washing kettle, the upper part of the washing kettle is communicated with a water head tank, and the lower part is communicated with a centrifugal machine; the centrifugal machine is provided with a clear liquid outlet and a solid material outlet, the clear liquid outlet is communicated to the clear liquid storage tank, and the solid material outlet is communicated to the drying machine; the dryer is communicated with the pulverizer through a pipeline, and the pulverizer is communicated with the bagging machine through a pipeline. The device is high in production efficiency, low in energy consumption and suitable for industrial production.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and particularly relates to a production device for pyroxasulfone. Background Art

[0002] Pyroxasulfone is a new broad-spectrum and highly active pre-emergence soil-applied herbicide developed by the Japanese company Nippon Soda Co., Ltd. It belongs to the isoxazole herbicides and is a potential inhibitor of very-long-chain fatty acid biosynthesis in plants. Pyroxasulfone can be widely applied to crops and can be safely used for crops such as corn, cotton, peanut, wheat, sunflower, etc. It can effectively control gramineous weeds such as Setaria, Digitaria, Echinochloa, etc. and broad-leaved weeds such as Amaranthus, Datura, Solanum, Abutilon, etc., and has the characteristics of broad herbicidal spectrum, high activity, low dosage, good safety, etc. Therefore, it has a broad market. At present, the commonly used method for producing pyroxasulfone is to first mix fluoride, ethanol and sodium tungstate in a mixing kettle, then transfer them to a synthesis kettle, add hydrogen peroxide and keep warm for reaction, transfer them to a cooling kettle for cooling, then transfer them to a water washing kettle for water washing and precipitate wet products, and then process the wet products; the whole process has a long cycle, generally about 18 hours, and the production process is complex, seriously affecting the production efficiency. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a production device for pyroxasulfone, which overcomes the defects of the prior art, has high production efficiency, low energy consumption, and is suitable for industrial production.

[0004] To solve the above technical problem, the technical solution of the utility model is:

[0005] A production device for pyroxasulfone includes a hydrogen peroxide high-level tank, a synthesis kettle, a water washing kettle and a centrifuge which are connected in sequence through pipelines, valves and pumps; the synthesis kettle is provided with a solid material inlet and a liquid material inlet, and the liquid material inlet is connected to the hydrogen peroxide high-level tank arranged above the synthesis kettle through a pipeline and a valve; the synthesis kettle is also connected with a condenser, and the condenser and the synthesis kettle form a circulation loop (circulating and cooling the materials in the synthesis kettle); the synthesis kettle is arranged above the water washing kettle, and the water washing kettle is also connected with a water high-level tank above and connected to the centrifuge below; the centrifuge is provided with a clear liquid outlet and a solid material outlet, the clear liquid outlet is connected to a clear liquid storage tank, and the solid material outlet is connected to a dryer; the dryer is connected to a crusher through a pipeline, and the crusher is connected to a bagging machine through a pipeline.

[0006] Preferably, the synthesis kettle is provided with a stirring device and a heating device; the materials in the kettle can be stirred and heated.

[0007] Preferably, the hydrogen peroxide high-level tank is also connected with a hydrogen peroxide storage tank. It is used to provide hydrogen peroxide.

[0008] Preferably, the condenser is a water-cooled condenser. The model is Q235B vertical type, and the manufacturer is Shandong Hante Industrial Equipment Manufacturing Co., Ltd.

[0009] Preferably, the water high-level tank is connected to a water storage tank.

[0010] Preferably, the water washing kettle is provided with a cooling device. The temperature of the material is further reduced to zero degree so that the material can precipitate.

[0011] Preferably, the centrifuge is a belt centrifuge. The model is PLD1600NF, and the manufacturer is Jiangsu Saidel Pharmaceutical Machinery Manufacturing Co., Ltd.

[0012] Preferably, the dryer is a rake dryer. The model is ZPG-3000, and the manufacturer is Changzhou Dasheng Drying Engineering Co., Ltd.

[0013] Preferably, the pulverizer is a vacuum pulverizer. The model is ZJ-pulverizer, and the manufacturer is Jiangyin Kanghe Machinery Manufacturing Co., Ltd.

[0014] Preferably, the bagging machine is an automatic bagging machine. It is a fully automatic quantitative packaging system provided by METTLER TOLEDO Group.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0016] The present utility model circulates and condenses the materials in the synthesis kettle through the condenser, and the process of transferring the materials to the cooling kettle for cooling in the original production process can be omitted; by setting height differences between different devices (between the hydrogen peroxide high-level tank and the synthesis kettle, between the synthesis kettle and the water washing kettle, between the water washing kettle and the centrifuge), the materials are transferred by their own gravity between the devices, reducing energy consumption; the entire production process takes a short time (shortened from 18 hours in the prior art to 12 hours), and manual operation is not required during the production process.

[0017] In summary, the present utility model has high production efficiency, low energy consumption, and is suitable for industrial production. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0019] In the figure, 1. Hydrogen peroxide high-level tank; 2. Synthesis kettle; 3. Water washing kettle; 4. Centrifuge; 5. Condenser; 6. Water high-level tank; 7. Dryer; 8. Pulverizer; 9. Bagging machine; 10. Hydrogen peroxide storage tank; 11. Water storage tank. Detailed Embodiments

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0021] Example 1:

[0022] As Figure 1 shown, a production device for oxasulfuron includes a hydrogen peroxide high-level tank 1, a synthesis kettle 2, a water washing kettle 3, and a centrifuge 4 that are sequentially connected through pipes (not marked), valves (not marked), and pumps (not marked); the synthesis kettle 2 is provided with a solid material inlet (not marked) and a liquid material inlet (not marked), and the liquid material inlet is connected to the hydrogen peroxide high-level tank 1 arranged above the synthesis kettle 2 through a pipe and a valve; the synthesis kettle 2 is also connected to a condenser 5, and the condenser 5 and the synthesis kettle 2 form a circulation loop (circulating and cooling the materials in the synthesis kettle); the synthesis kettle 2 is arranged above the water washing kettle 3, and the water washing kettle 3 is also connected to a water high-level tank 6 above and to the centrifuge 4 below; the centrifuge 4 is provided with a clear liquid outlet (not marked) and a solid material outlet (not marked), the clear liquid outlet is connected to a clear liquid storage tank (not marked), and the solid material outlet is connected to a dryer 7; the dryer 7 is connected to a crusher 8 through a pipe, and the crusher 8 is connected to a bagging machine 9 through a pipe.

[0023] The hydrogen peroxide high-level tank 1 is also connected to a hydrogen peroxide storage tank 10; the water high-level tank 6 is also connected to a water storage tank 11 to provide water for water washing.

[0024] During actual production: first, fluoride, ethanol, and sodium tungstate are added to the synthesis kettle 2, the temperature is raised to 80°C, hydrogen peroxide is added dropwise, and after dropping, it is kept warm for 1 hour. Then, the temperature of the materials is reduced to room temperature through the condenser 5 and transferred to the water washing kettle 3. Water is added to the water washing kettle 3 for water washing, and at the same time, the temperature is reduced to zero degree to precipitate oxasulfuron from the reaction solution; after the water washing reaction is completed, the materials are transferred to the centrifuge 4 for centrifugation to separate the wet product of oxasulfuron; then the wet product is dried by the dryer 7, crushed by the crusher 8, and then transported to the bagging machine 9 for bagging, and finally the finished product of oxasulfuron is obtained.

[0025] It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A sulfonepyraclostrobin production device, characterized in that: The invention comprises a hydrogen peroxide high-level tank, a synthesis kettle, a water washing kettle and a centrifuge which are sequentially connected through pipelines, valves and pumps; the synthesis kettle is provided with a solid material inlet and a liquid material inlet, and the liquid material inlet is connected to the hydrogen peroxide high-level tank arranged on the synthesis kettle through a pipeline and a valve; the synthesis kettle is also connected with a condenser, and the condenser and the synthesis kettle form a circulation loop; the synthesis kettle is arranged on the water washing kettle, and the water washing kettle is also connected with a water high-level tank on the top, and is connected to the centrifuge below; the centrifuge is provided with a clear liquid outlet and a solid material outlet, the clear liquid outlet is connected to a clear liquid storage tank, and the solid material outlet is connected to a dryer; the dryer is connected to a pulverizer through a pipeline, and the pulverizer is connected to a bagging machine through a pipeline.

2. The sulfonepyraclostrobin production device according to claim 1, characterized in that: The synthesis reactor is provided with a stirring device and a heating device.

3. The sulfonepyraclostrobin production device according to claim 1, characterized in that: The hydrogen peroxide high-level tank is also connected to a hydrogen peroxide storage tank.

4. The sulfonepyraclostrobin production device according to claim 1, characterized in that: The water high level tank is connected with a water storage tank.

5. The sulfonepyraclostrobin production device according to claim 1, characterized in that: The water washing kettle is provided with a cooling device.

6. The sulfonepyraclostrobin production device according to claim 1, characterized in that: The condenser is a water-cooled condenser, the centrifuge is a belt centrifuge, the dryer is a rake dryer, and the pulverizer is a vacuum pulverizer.

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