Exhaust gas treatment?
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Can a cooler be added before the exhaust gas enters the elution tower? Can -35 degree water be used as cooling water? What kind of cooling water is suitable? Is it possible to reduce the possibility of clogging by recycling the chlorosilane first and then rinsing it?
Your exhaust gas is not recycled, but is directly rinsed. Chlorosilane will hydrolyze when exposed to water, producing a large amount of hydrolyzate, which will clog the pipeline. Even if you cool down the chlorosilanes, those vapor phase chlorosilanes may still clog the pipes. It is recommended to create an exhaust gas recovery device and use dry recovery. Only in this way can there be economic benefits!
It seems that only big companies like Tianchen would consider adding a cooler before the exhaust gas enters the elution tower... But when you find that after spending money to install it, the cooler becomes clogged within a few days, you won't think so. Adding a cooler will hardly have any effect. The only result is that the front is blocked, and the back...it will be blocked no matter how it is blocked. Over time, your cooler is just like a vase! If you have to use it, -35℃ frozen brine is good. If you can enter the recovery device before and recycle part of it, the blockage will be less serious, but it will still be blocked. Of course, it depends on your exhaust gas treatment capacity!
4# zw1902 Thank you
The specifics will depend on where your exhaust condenser is installed. It is definitely not possible to install the tail gas condenser next to the tail gas wash tower. What is your tail gas pressure? As long as it is ensured that the moisture in the elution tower does not invade the tail gas pipeline, it is still beneficial to install a condenser. After all, it not only reduces the processing capacity of the tail gas, but also recovers chlorosilane.
Why do you use water for rinsing?
Can a cooler be added before the exhaust gas enters the elution tower? Can -35 degree water be used as cooling water? answer: It can be used, but there are still many issues to consider, which need to be considered based on the production process. For example: -Doesn’t 35 degrees also require cooling down a lot of impurities? How do you deal with the condensate! Will it have any impact on the production process? In short, I personally think that the design must be coordinated and not blindly only see the partial part, as this may cause many problems later! Personal opinion!