How to handle the discharge valve of the high-pressure scrubber when increasing the CO2 pressure in the CO2 stripping process for urea production
Thread Content
After the urea produced by the CO2 stripping method has undergone heating passivation with steam and air, and once this heat-retaining passivation is complete, it is necessary to increase the pressure using CO2. So, what should be done with the discharge valves that were originally in an open state throughout the high-pressure system before increasing the pressure? Should it remain open, or be closed? Especially the high-pressure scrubber discharge valve?
It can be said that there isn’t much difference between opening and closing
Here, everything is shut down first; the pool-type condenser is filled with liquid, a liquid seal is established on the liquid outlet pipe of the synthesis tower, and only then is pressure increased and feeding started.
I think it’s related to device security; I hope experts can give some advice
This post was last edited by 1025199692 on 2016-5-18 20:58: High-pressure washer – discharge at the small U-bend is closed! Liquid injection seals at the high-pressure washer to the high-pressure liquid ammonia injector, and at the synthesis liquid outlet to the stripping tower; discharge of the high-pressure methane refrigerant’s liquid phase – search
I’ve been there; although I don’t understand it, I have learned* it
Just turn off the discharge before feeding the material. Also, make sure to close the rinse water valve tightly to avoid accidents.
I also have things to learn*, please give me some advice!