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Low-value silicon powder recycling system

A silicon powder, low-value technology, applied in the field of low-value silicon powder recycling system, can solve the problems of high production cost, difficult recycling and reuse of low-value silicon powder, waste of raw materials, etc., to improve utilization rate and recycling rate , the effect of reducing waste

Pending Publication Date: 2019-06-14
SICHUAN YONGXIANG POLY SILICON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a low-value silicon powder recycling system, and solve the problem that the low-value silicon powder is difficult to recycle and reuse in the current technology, the waste of raw materials is serious, and the production cost high problem

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] A low-value silicon powder recycling system disclosed in the embodiment of the present invention can effectively recycle low-value silicon powder with small fineness into the synthesis process of trichlorosilane, improve the utilization rate of raw materials, and reduce the waste of raw materials. Reduce the cost of production.

[0023] like figure 1 and figure 2 Shown, a kind of low-value silicon powder recycling system com...

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Abstract

The invention discloses a low-value silicon powder recycling system, comprising a low-value silicon powder reactor, wherein the low-value silicon powder reactor comprises a reactor body, the reactor body is mainly formed by a gas distribution section located at the lower part, a reaction section located at the middle, and a gas-solid separation section located at the upper part, the gas distribution section comprises a feed gas distributor located below the reaction section and a feed gas inlet formed in the lower side of the feed gas distributor, the gas-solid separation section is provided with a synthesis gas outlet, the reaction section is provided with a silicon powder inlet and a heating device, and a reaction gas distributor is further arranged in the reaction section. The low-valuesilicon powder recycling system disclosed by the invention reduces the speed of gas flow in the reactor, so that low-value silicon powder can fully react with feed gas, reaction time is prolonged, the recovery rate of the low-value silicon powder is improved, the condition that the low-value silicon powder is treated as solid waste is avoids, raw material waste is reduced, and production cost islowered.

Description

technical field [0001] The invention relates to the technical field of polysilicon production, in particular to a recycling system for low-value silicon powder. Background technique [0002] A variety of low-quality, low-value and low-value silicon powders are produced in the polysilicon production process, such as filtered silicon powders, silicon powders entrained in displacement gas, silicon powders in leaching tanks, recycled and filtered silicon powders, etc. The silicon content of these silicon powders is usually in the 30% to 90%, it is difficult to be directly used in the production process of polysilicon, usually treated as solid waste or sold at a low price, the waste of production raw materials is serious, and the production cost is high. Contents of the invention [0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide a low-value silicon powder recycling system, and sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/107
Inventor 何鹏袁中华汪云清
Owner SICHUAN YONGXIANG POLY SILICON
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