Is sand still used for fire suppression in polysilicon facilities?
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In the design of polysilicon plants, according to the regulations, silicon trichloride hydrogen should not be extinguished using water; instead, sand or foam is required. However, in actual production, when there is a leak and a fire breaks out, using a large amount of water for extinguishing proves to be the most effective method. This approach has been proven effective in practice, but the regulations do not allow it. I’m interested to hear if anyone has any good suggestions – perhaps the regulations are a bit outdated, as there were no polysilicon plant designs in China before, and thus no specific regulations on this topic existed
Reply to 1# *aobao_101: Both sand and water are needed; sand reacts with TCS, while water is used to remove HCL, the product of TCS decomposition!
Sand is used for basic processing, and water is utilized without affecting other devices.
Think about it yourself: if there is a small amount of leakage, is it easier to deal with sand or water? This method is only suitable for small leaks; using a large amount of water to flush it out works better
Everything should be based on reality; it depends on the circumstances