Fluidized bed distribution plate for production of tetrachloro isophthalonitrile

A technology of tetrachloroisophthalonitrile and distribution plate, which is applied in the field of fluidized bed distribution plate, can solve problems such as poor state of plate separation, improve the state of gas-solid fluidization, improve the fluidization state, and lengthen the service period Effect

Inactive Publication Date: 2011-03-16
JIANGSU XINHE AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the tetrachloroisophthalonitrile produced by domestic direct chlorination adopts a fluidized bed plus a fixed bed, and most of the sub-plates used in the fluidized bed are orifice-type, and the sub-plates are not in good condition

Method used

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  • Fluidized bed distribution plate for production of tetrachloro isophthalonitrile
  • Fluidized bed distribution plate for production of tetrachloro isophthalonitrile

Examples

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Effect test

Embodiment 1

[0015] A kind of tetrachloroisophthalonitrile production fluidized bed distribution plate 1, this distribution plate 1 is circular, and the diameter of distribution plate 1 is 1200mm, and the middle area of ​​distribution plate 1 has air hole 2, and the diameter of air hole 2 is 20mm, the air holes 2 are arranged in a regular triangle on the distribution plate, the angle between the two sides is 60°, and the distance between the horizontally distributed air holes 2 is 120mm, which is arranged corresponding to the tubes below, and the opening ratio of the distribution plate 1 is 2.0% , the air velocity through the board is controlled at 0.2m / s. The distribution plate 1 of the fluidized bed overcomes the gas distribution that is limited to about 0.5m above the sub-plate by ordinary distribution plates, solves the phenomenon of channel flow, pulse and blockage, and can break the flow of large bubbles at the same time, resisting the merging and growth of bubbles, thereby improving ...

Embodiment 2

[0017] A fluidized bed distribution plate for the production of tetrachloroisophthalonitrile, the distribution plate is circular, the diameter of the distribution plate is 1100mm, there are air holes in the middle area of ​​the distribution plate, the diameter of the air holes is 15mm, and the air holes are on the distribution plate Arranged in an equilateral triangle, the angle between the two sides is 60°, the distance between the horizontally distributed air holes is 120mm, which is arranged corresponding to the tubes below, the opening rate of the distribution plate is 1.0%, and the gas velocity through the plate is controlled at 0.1m / s. The distribution plate of the fluidized bed overcomes the gas distribution that is limited to about 0.5m above the sub-plate by ordinary distribution plates, solves the phenomenon of channel flow, pulse and blockage, and at the same time breaks the flow of large bubbles and resists the merging and growth of bubbles, thereby improving gas-s...

Embodiment 3

[0019] A fluidized bed distribution plate for the production of tetrachloroisophthalonitrile, the distribution plate is circular, the diameter of the distribution plate is 1300mm, there are air holes in the middle area of ​​the distribution plate, the diameter of the air holes is 30mm, and the air holes are on the distribution plate Arranged in an equilateral triangle, the angle between the two sides is 60°, the distance between the horizontally distributed air holes is 120mm, which is arranged correspondingly to the tubes below, the opening rate of the distribution plate is 3.0%, and the gas velocity through the plate is controlled at 0.2m / s. The distribution plate of the fluidized bed overcomes the gas distribution that is limited to about 0.5m above the sub-plate by ordinary distribution plates, solves the phenomenon of channel flow, pulse and blockage, and at the same time breaks the flow of large bubbles and resists the merging and growth of bubbles, thereby improving gas...

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Abstract

The invention relates to a fluidized bed distribution plate for production of tetrachloro isophthalonitrile. Pores are reserved in the central area of the round distribution plate, and are arranged in a regular triangle shape, the plate penetrating air speed is controlled to be between 0.1 and 0.2m / s, and the aperture ratio is 1.0 to 3.0 percent. Compared with the prior art, the fluidized bed distribution plate improves the fluidizing state and prolongs the life cycle of a catalyst by 3 to 5 days, only 25kg of catalyst is consumed for each ton of chlorothalonil, the phenomena of channeling, impulse and blocking can be avoided, large bubble flow can be crushed, and the merged growth of bubbles can be suppressed, so the gas-solid fluidization state can be improved, the production pressure of the chlorothalonil is stable, the content of hexachlorobenzene is lower than 40ppm, and the content of the tetrachloro isophthalonitrile product is over 98 percent.

Description

technical field [0001] The invention relates to a fluidized bed distribution plate, in particular to a fluidized bed distribution plate for tetrachloroisophthalonitrile production. Background technique [0002] Tetrachloroisophthalonitrile is obtained by chlorination of isophthalonitrile in a fluidized bed. Tetrachloroisophthalonitrile, the English name is chlorothalonil, and the common name is chlorothalonil. It is a broad-spectrum fungicide with high efficiency and low toxicity. Agents, fruit preservatives, fungicides, protective agents for coatings and adhesives. [0003] Most of the tetrachloroisophthalonitrile produced by domestic direct chlorination adopts a fluidized bed plus a fixed bed, and most of the sub-plates used in the fluidized bed are orifice-plate type, and the sub-plates are not in good condition. Contents of the invention [0004] The purpose of the present invention is exactly to provide a kind of production pressure stable, solves the tetrachloroiso...

Claims

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Application Information

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IPC IPC(8): B01J8/44C07C255/51
Inventor 陆正松胡清
Owner JIANGSU XINHE AGROCHEM
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