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Bag type dust collector for producing silicon tetrachloride by direct method

A bag-type dust collector and silicon tetrachloride technology, applied in the direction of silicon halide compounds, separation methods, halosilanes, etc., can solve the problems of cumbersome separation and purification process steps, and achieve the effect of avoiding dust removal and improving efficiency

Inactive Publication Date: 2014-02-12
ZHEJIANG FUSHITE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the presence of multiple chlorosilane components in the reaction process, the subsequent separation and purification process steps are relatively cumbersome

Method used

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  • Bag type dust collector for producing silicon tetrachloride by direct method
  • Bag type dust collector for producing silicon tetrachloride by direct method
  • Bag type dust collector for producing silicon tetrachloride by direct method

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Embodiment Construction

[0023] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 A kind of production device utilizing direct method to produce silicon tetrachloride shown, this device comprises liquid chlorine storage tank 1, liquid chlorine vaporizer 3, silicon powder feeding device 5, fluidized bed reactor 6, primary cyclone separator 10 , Secondary cyclone separator 11, bag filter 12, spray tower 14, alkali washing tower 18, etc. Wherein the outlet of the liquid chlorine storage tank 1 is connected with the inlet of the liquid chlorine vaporizer 3 with a canned pump 2 to facilitate continuous reaction. A vacuum buffer tank 4 is connected between the liquid chlorine vaporizer 3 and the fluidized bed reactor 6, so that the vaporized chlorine gas can flow into the fluidized bed reactor 6 stably at a stable air velocity. The silicon powder feeding device 5 is connected with a nitroge...

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Abstract

The invention relates to a bag type dust collector for producing silicon tetrachloride by a direct method. The bag type dust collector comprises an outer shell body and a plurality of bag devices, wherein a baffle plate is arranged in the outer shell body to divide the outer shell body into a dust collecting chamber and a gas outlet chamber, the bag devices are fixedly arranged on the baffle plate, a gas inlet of the dust collector is arranged above the dust collecting chamber, a dust outlet is arranged at the bottom of the dust collecting chamber, a fine powder recycling tank is arranged below the dust outlet, a gas outlet of the dust collector is arranged on the side wall of the gas outlet chamber, a heating jacket is arranged on the outer side wall of the dust collecting chamber, and a plurality of bag devices are all made of high-temperature resistant materials. According to the bag type dust collector, a small quantity of fine silicon powder in the gas crude product is recycled through the bag type dust collector, therefore, most of silicon powder in the silicon tetrachloride crude product gas is removed, and the dust collection operation in the following process is avoided.

Description

technical field [0001] The invention belongs to the technical field of organosilicon monomer synthesis, and in particular relates to a bag-type dust collector for producing silicon tetrachloride by a direct method. Background technique [0002] Silicon tetrachloride, molecular formula: SiCl 4 , is a colorless, corrosive, nonflammable liquid with a choking odor. Forms dense smoke when exposed to moist air, rapidly hydrolyzes to liberate hydrogen chloride. The boiling point is 57.6°C. Melting point -70.0°C. It can be used in the manufacture of organosilicon compounds, such as fumed silica, tetraethyl orthosilicate, organosilicon oil, high-temperature insulating varnish, organosilicon resin, silicone rubber and heat-resistant gasket materials. High-purity silicon tetrachloride is used as a material for the manufacture of polycrystalline silicon, high-purity silicon dioxide, inorganic silicon compounds, and quartz fibers. It is used in the military industry to manufacture sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02C01B33/107
Inventor 方卫民谭军刘国晶汪建阳邱贤辉刘成国
Owner ZHEJIANG FUSHITE GROUP
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