On the design of the syngas condenser for trichlorosilane production
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1. What is the typical design for the condenser in trichlorosilane synthesis? Is it equipped with double tube sheets at both ends? 2. When designing the condenser for trichlorosilane synthesis gas, what value is appropriate for the fouling coefficient on the trichlorosilane side? Should the impact of chlorides and a small amount of silica powder on heat transfer also be taken into consideration?
1. The choice of condenser depends on the process steps. The trichlorosilane synthesizer is still quite hot when it comes out of the reactor, and a series of purification steps are required before it can reach the condenser. Moreover, to prevent condensation from causing blockages, special arrangements are required. It depends on your process package. 2. As mentioned in the first step, impurity removal needs to be considered before condensation; theoretically, there should be no silicon powder present. As for chlorides, I’m afraid aluminum chloride is the most problematic one; it is necessary to take into account the aluminum content in the metal silicon powder, and if that content is high, the effects of aluminum chloride need to be considered.
The syngas coming out of the reactor first passes through bag filtration and wet dust removal, before being condensed; it is the design of this condenser that interests me
Doesn’t wet dust removal involve condensation? ?