Leakage issue in PVC resin silo
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PVC resin production units employ the suspension process developed by the Second North Research Institute, and the transportation of PVC resin is carried out via pressurized air conveyance. The schematic diagram of the silo is as follows: there are two discharge openings, one equipped with a blast plate and the other leading directly to the outside; however, when the liquid level of material in the silo is too high, the material will be carried out through the discharge openings during transfer. A filter screen should be installed at the vent; due to external weather conditions and the properties of the material itself, if this screen gets clogged and the explosion plate fails to detonate, it can pose a safety risk (this has already happened before, with cracks appearing in the welds on the top of the silo). How should this be modified? Install a breathing valve. An improved dust cover? I earnestly ask the experienced members of this forum for their guidance. Thank you!
The feeding method was changed to tangential feeding, with the silo being treated as a large cyclone separator; sediment formed
Suggestion: Operate while maintaining a certain low level of material; use filter bags equipped with blowing functions for dust collection. Under environmental regulations, this can help reduce dust levels, and from a process perspective, it also helps to decrease the amount of fine powder
However, when the liquid level of the material in the silo is too high, the material will be carried out through the drainage port during transportation. Questioning this statement: when the liquid level is low, material will also be carried out through the drain port during transportation, right?
Tangential feeding feels good; it would be even better if a buffer mechanism were added between evacuation and feeding to reduce wind speed