Separation system and method for polysilicon cold hydrogenation product
By setting the difference in the number of trays between the gas phase balance port and the side sampling port to 0-2 in the polycrystalline silicon cold hydrogenation process, and using the gas phase balance pipe to achieve pressure balance, the problem of pressure stability in the silicon tetrachloride buffer tank was solved, the consumption and emission of hydrogen and silicon tetrachloride were reduced, and the separation efficiency and energy efficiency were improved.
Patent Information
- Application Number
- PCT/CN2024/130660
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-08
- Filing Date
- 2024-11-07
- Publication Date
- 2026-01-15
AI Technical Summary
In the existing polysilicon cold hydrogenation process, the pressure of the silicon tetrachloride buffer tank needs to be stabilized by adding hydrogen, resulting in high consumption and emissions of hydrogen and silicon tetrachloride.
By setting the difference in the number of trays between the gas phase balance port and the side sampling port in the coarse separator to 0-2, the pressure balance between the silicon tetrachloride buffer tank and the coarse separator is achieved using the gas phase balance pipe, thereby reducing the dependence on hydrogen.
This reduces waste gas emissions during the inlet of the silicon tetrachloride buffer tank, decreases the consumption and emissions of hydrogen and silicon tetrachloride, improves separation efficiency, and reduces energy consumption.
Smart Images
Figure CN2024130660_15012026_PF_FP_ABST
Abstract
Citation Information
Patent Citations
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