Seek help in addressing the dust issue during the recovery process in the polymerization reactor in polypropylene production
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Dear technicians, after the intermittent production of polypropylene, recovering the unreacted propylene can easily lead to dust entrainment, resulting in dust accumulation in the subsequent buffer tanks and affecting safe production. What methods can be used to address this issue?
To reduce the recovery speed, the recovery valve should be set to a lower position, thereby controlling the recovery time per batch to between 15 and 20 minutes. There is also a cyclone separator installed in front of the condenser, but it is understood that its effectiveness is poor if no ash hopper is used and the ash is not discharged regularly.
Control the recycling speed; install filter screens on the recycling line, two in total. When one gets clogged, switch to the other while cleaning the clogged one, which serves as a spare.
You might not have used a small unit before; adding a filter definitely won’t work. At the moment, there is no good solution; one can only regularly clean the recovery tank.
You haven’t done this before, right? Adding a filter to the recycling line is part of the original design!
I think you can make a dust collector; you can use either a small vacuum pump or a jet pump to draw in the dust
Small entities need to reduce investments; regular cleanup is a common solution
In the continuous process: (1) For gaseous propylene containing powder at high pressure, a high-pressure propylene scrubber is used (that is, a high-pressure distillation tower); (2) For gaseous propylene containing powder at low pressure, a larger bag filter is used for separation.
(1) For the recovery of high-pressure gaseous propylene, two filters are sufficient – one in use and one as a backup – which are cleaned regularly. However, when recovering, the valve should be opened slowly to allow for a uniform release, and the recovery time must not be too short. (2) For gaseous propylene containing powder at low pressure, a suspension separator is used to regularly discharge the recovered material. (3) However, when recovering, the valve should be opened slowly to allow for a uniform release, and the recovery time must not be too short. (4) Use top interconnection for the propylene recovery and purified propylene tanks; install a Y-type filter on the purified propylene pump.