Purification of trichlorosilane: guided sieve tray tower or cross-flow sieve tray tower
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Most polysilicon plants in China use cross-flow sieve tray columns for raw material purification. However, these columns have limited operational flexibility, are difficult to operate, and exhibit low mass transfer efficiency; as a result, multiple distillation columns are used, leading to energy waste. Currently, companies such as Sunwoda are adopting guided sieve tray columns equipped with overflow weirs and downcomers. Fellow industry professionals, please discuss the advantages of guided sieve tray columns over cross-flow sieve tray columns. Are there any other purification columns with higher mass transfer efficiency that could be used in the polysilicon industry? This post was last edited by LHY8771 on 2009-4-17 10:53.]
Try to use cross-flow sieve plate towers as little as possible – it’s too difficult to control them!
The cross-flow sieve tray is a gas-liquid countercurrent tray, which is less commonly used in distillation. . Where does the guiding sieve tray tower used by Sevi, as mentioned by the original poster, originate from in terms of technology?