Polycrystalline silicon cold hydrogenation flushing and continuous deslagging system

By designing a polysilicon cold hydrogenation flushing and continuous slag discharge system, and using shut-off valve control and automated flushing of the silicon tetrachloride residual liquid in the residual liquid buffer tank, the problem of slag discharge pipeline blockage in the polysilicon cold hydrogenation process was solved, and the continuity and stability of the chemical process were achieved.

CN223393424UActive Publication Date: 2025-09-30INNER MONGOLIA XINTE SILICON MATERIAL CO LTD
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Patent Information

Application Number
CN202422519401.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-17
Publication Date
2025-09-30
Estimated Expiration
2034-10-17

AI Technical Summary

Technical Problem

The slag discharge pipeline of the quenching tower in the synthesis unit of the polysilicon cold hydrogenation process is prone to blockage, and the existing flushing technology may lead to raw material loss and system feed fluctuations.

Method used

A polysilicon cold hydrogenation flushing and continuous slag discharge system is designed, which includes a first pipeline, a residual liquid buffer tank, a second pipeline and a third pipeline. Automatic flushing and slag discharge are achieved through the control of a shut-off valve to prevent blockage, and the residual silicon tetrachloride in the residual liquid buffer tank is used for pipeline flushing.

Benefits of technology

Prevent slag discharge pipeline from being blocked, realize continuity of chemical process, avoid loss of raw materials and system fluctuation, and make the system more stable and economical.

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Abstract

The utility model discloses a polycrystalline silicon cold hydrogenation flushing and continuous deslagging system which comprises a first pipeline, a residual liquid buffer tank, a second pipeline and a third pipeline, one end of the first pipeline is connected with a synthesis device quench tower in a polycrystalline silicon cold hydrogenation process, the other end of the first pipeline is connected with a slag slurry section, and the first pipeline is used for deslagging the synthesis device quench tower; a first stop valve and a second stop valve are arranged on the first pipeline; silicon tetrachloride raffinate is temporarily stored in the raffinate buffer tank, the raffinate buffer tank is connected with the first pipeline through the second pipeline, the joint of the first pipeline and the second pipeline is located between the first stop valve and the second stop valve, and a third stop valve is arranged on the second pipeline; one end of the third pipeline is connected with the second pipeline, the joint of the third pipeline and the second pipeline is located at the upstream of the third stop valve, the other end of the third pipeline is connected with the waste liquid tank area, and a fourth stop valve is arranged on the third pipeline. According to the invention, the blockage of the deslagging pipeline can be prevented, the continuity of the chemical process is realized, and raw material loss and system fluctuation cannot be caused.
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