Continuous granulation process equipment for trichlorfon

A process equipment, trichlorfon technology, applied in pesticides, organic chemistry, chemical instruments and methods, etc., can solve the problems of unfavorable scraper shoveling, low production efficiency, lack of pre-crystallization, etc., to save packaging material costs And labor costs, improve production efficiency and sales, the effect of uniform and round particle size

Pending Publication Date: 2021-10-29
NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional trichlorfon crystallization process has the following problems: ①. The production method occupies a large area, intermittent production, and low production efficiency; ②. The waste of packaging materials is serious; ③. When the worm is crushed; ④. After the crystallization of trichlorfon in the liquid bag, a small amount of trichlorfon solid is produced on the site, and a large amount of phosphorus-containing wastewater is produced after washing with water
Due to the lack of pre-crystallization process in this method, it is not easy to form hard hemispherical trichlorfon particles, which is not conducive to shoveling with a scraper, making it difficult to achieve the purpose of continuous granulation

Method used

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  • Continuous granulation process equipment for trichlorfon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, put 7.2t of trichlorfon material in the insulation kettle, use hot water to insulate the material, control the internal temperature of the trichlorfon material to 70°C, open the bottom material valve, start the feed pump, and control the discharge pump The flow rate is 3m 3 / h, transport the trichlorfon liquid material to the pre-crystallizer, there is a hinged scraper on the internal stirring of the pre-crystallizer, so as to ensure that the material does not accumulate on the wall, and the fluidity of the material is guaranteed, and at the same time, the external circulation pump of the pre-crystallizer is turned on , the control flow is 10 m 3 / h, through forced circulation, heat exchange is enhanced to ensure that the material forms a slurry with crystals in a short period of time, and the partially crystallized trichlorfon material formed by cooling the pre-crystallizer passes through the loop pipeline and returns to the In the insulati...

Embodiment 2

[0024] .Put 7.2t of trichlorfon material in the insulation kettle, use hot water to insulate the material, control the internal temperature of the trichlorfon material to 75°C, open the bottom material valve, start the feed pump, and control the flow of the feed pump 2m 3 / h, transport the trichlorfon liquid material to the pre-crystallizer, there is a hinged scraper on the internal stirring of the pre-crystallizer, so as to ensure that the material does not accumulate on the wall, and the fluidity of the material is guaranteed, and at the same time, the external circulation pump of the pre-crystallizer is turned on , the control flow is 5m 3 / h, through forced circulation, heat exchange is enhanced to ensure that the material forms a slurry with crystals in a short period of time, and the partially crystallized trichlorfon material formed by cooling the pre-crystallizer passes through the loop pipeline and returns to the In the heat preservation kettle, install a viscometer ...

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Abstract

The invention relates to continuous granulation process equipment for trichlorfon. Synthesized trichlorfon materials are put into a heat preservation kettle to be gradually cooled, it is guaranteed that the materials are in a liquid state, and then the materials are conveyed into a pre-crystallizer through a feeding pump to be slightly cooled; and trichlorfon slurry flowing out of the pre-crystallizer is fed into a granulator. The materials are dropped on an annular steel belt through a distributing device, a cooling liquid spraying device can be arranged between the distributing device and the annular steel belt, trichlorfon liquid drops are dropped in cooling liquid to form hard spherical white particles, and then the hard spherical white particles flow out, and finally the hard spherical white particles are dried and cooled. According to the equipment of the invention, no three wastes are discharged basically, so that occupational health injury is reduced; heat generated by synthesis of the trichlorfon is recycled through heat exchange, so that environmental protection and energy conservation are realized; and the particle size of the finished product is more uniform and rounded, and the appearance and the production efficiency of the product are improved.

Description

technical field [0001] The invention relates to an automatic production technology of granular pesticides. Background technique [0002] Trichlorfon is a phosphonate organophosphorus insecticide, which is mainly stomach poisoning and contact killing on insects. It has the characteristics of high efficiency, low toxicity, low residue, and water solubility. Pure trichlorfon is white crystalline powder with aromatic odor, melting point is 83~84°C, solubility (g / L, 25°C): water 154, chloroform 750, ether 170, benzene 152. But basically insoluble in aliphatic hydrocarbons and petroleum, n-pentane 1.0, n-hexane 0.8, solubility in cyclohexane is on the order of μg / ml, almost insoluble. [0003] The current production process mainly uses chloral and dimethyl phosphite as raw materials to prepare trichlorfon through a one-step method. The content of the synthesized trichlorfon is basically 90~93%, which contains demethyl trichlorfon, demethyl trichlorfon, Impurities such as chlortr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/02B01J2/06B01D9/02C07F9/40A01N57/20A01N25/12A01P7/04
CPCB01J2/02B01J2/06B01D9/00C07F9/4006A01N57/20A01N25/12
Inventor 孟长春吉伟孙春楼陆沈华潘风春张维高
Owner NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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