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发明公开
CN105749575A 多晶硅生产中的尾气吸收液和冷凝液回收的分隔壁精馏塔、方法、处理系统 有权

多晶硅生产中的尾气吸收液和冷凝液回收的分隔壁精馏塔、方法、处理系统
摘要：
本发明公开了一种多晶硅生产中的尾气吸收液和尾气冷凝液回收的分隔壁精馏塔、方法、处理系统，该分隔壁精馏塔包括进料口，分隔壁精馏塔包括至少部分的设置在其内的分隔壁，分隔壁将分隔壁精馏塔分隔为Ⅰ区域、Ⅱ区域、Ⅲ区域，Ⅲ区域设置于分隔壁精馏塔的塔釜，Ⅰ区域与Ⅱ区域分别设置于分隔壁的两侧，进料口与Ⅰ区域同侧，Ⅰ区域用于解析氯化氢；Ⅱ区域为侧线采出段，Ⅱ区域用于通过侧线采出来收集二氯二氢硅和三氯氢硅的混合物；Ⅲ区域为Ⅰ区域与Ⅱ区域的公共精馏段，Ⅲ区域用于收集四氯化硅。在一个分隔壁精馏塔内实现了氯化氢、四氯化硅、二氯二氢硅和三氯氢硅混合物的分离，且耗能小、体积小、操作流程简单、回收效果好。
摘要（英）：

The present invention discloses a divided wall distillation column for recovery of a tail gas absorption liquid and a condensate liquid in polysilicon production, a method and a processing system, the divided wall distillation column includes a dividing wall which is at least partly arranged in the divided wall distillation column, the dividing wall divides the divided wall distillation column into a I region, a II region and a III region, the III region is arranged in a kettle of the divided wall distillation column, the I region and the II region are arranged respectively on both sides of the dividing wall, a material inlet is at the same side of the I region, the I region is used to resolve hydrogen chloride desorption; the II region is a side take-off section, and is used for collection of a dichlorosilane and trichlorosilane mixture by the side take-off, and the III region is a common rectifying section of the I region and the II region, and is used for collection of silicon tetrachloride. Separation of the hydrogen chloride, the silicon tetrachloride and the dichlorosilane and trichlorosilane mixture can be achieved in one divided wall distillation column, and the divided wall distillation column is low in energy consumption, small in size, simple in operation process and good in recovery effect.

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