Fluidized bed distributor for chlorothalonil production

Abstract

The invention provides a fluidized bed distributor for chlorothalonil production. The fluidized bed distributor includes a distribution plate and air caps, wherein the distribution plate is provided with a plurality of air holes, and the air caps are correspondingly arranged on the air holes. The air caps are fixedly connected to the distribution plate, and gaps are formed between the edges of theair caps and the distribution plate. The distribution plate has an opening ratio of 0.5%-5%. According to the arrangement of the air holes and the air caps in the fluidized bed distributor and the adjustment of the opening ratio, the uniform distribution of reaction gas is promoted, the fluidization state is improved, the stability of a reaction is improved, the product quality of the chlorothalonil is high, and the content of hexachlorobenzene is less than 10ppm; and meanwhile, the fluidized bed distributor effectively solves the problem that a catalyst is prone to sintering and blocking thedistribution plate, the service life of the catalyst is prolonged, and the production cost of the chlorothalonil is reduced.

Description

technical field [0001] The invention belongs to the technical field of fluidization equipment, and relates to a fluidized bed distributor used for the production of chlorothalonil. Background technique [0002] Chlorothalonil, whose chemical name is tetrachloroisophthalonitrile, is a protective fungicide with high efficiency, low toxicity, broad spectrum and low residue. It is widely used in the control of fungal diseases in agriculture and forestry, especially in vegetables. , fruit and other cash crops; in addition, chlorothalonil also has important uses in the field of mildew-proof industry, such as the manufacture of mildew-proof coatings, mildew-proof wallpaper, electrical appliances, wood and other mildew-proof, the production scale at home and abroad Constantly expanding, it has become one of the large-tonnage and excellent pesticide varieties in the world. [0003] Chlorothalonil is usually prepared by gas-phase chlorination, and its production process is mainly div...

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a fluidized bed distributor for the production of chlorothalonil. The adjustment of parameters such as the reaction rate can promote the uniform distribution of the reaction gas in the reactor, effectively avoid the problem of the catalyst clogging the distribution plate, improve the fluidization state, and improve the reaction stability. The obtained chlorothalonil product is of high quality

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