Technical question: What is the cooling medium for polysilicon circulating water?
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This post was last edited by hesonchang214 on 2011-7-25 at 11:28. As the title suggests, what is the cooling medium for the polysilicon circulating water? In other words, what is it that the circulating water is used to cool in the polysilicon production process?
In the polysilicon process, recycled water is used quite a lot. For example, the exhaust gases from reduction furnaces, those from hydrogenation furnaces, and the mixed gases compressed by compressors, etc. These substances certainly include H2, HCL, trichlorosilane, silicon tetrachloride, dichlorodihydrosilane, and so on. There are also other condensers that use circulating cooling water to cool non-primary process fluids; for example, the condensers in oil cooling systems require a large amount of circulating water as well.
The circulating water doesn’t come into direct contact with the material, right?
Reply to 4# Ordinary Life: What do you mean by direct contact? Circulating water coolers are usually shell-and-tube type, with the circulating water and the material flowing through either the shell side or the tube side, respectively.
I have taken on a project related to polysilicon. Since I am not familiar with the manufacturing process, some of the washing water ends up in the circulating water, which is why I am asking this question. Thank you all for your help. That means the materials have no direct contact with the circulating water.
In general, the media in circulating water systems do not come into direct contact@!
Some processes, in order to save water or reduce wastewater discharge for environmental protection, recycle the condensate from certain devices into the circulating water system. It’s necessary to consider what components are present in this condensed water
After treatment, part of the wastewater from polysilicon production is also used as makeup water for circulating water.