During the shutdown, conversion, and cooling phase of the acid production overhaul, several pumps are started for dry suction
Thread Content
Question: During the shutdown for major repairs in the process of producing acid from smelting flue gas, when using heat blowdown for cooling, should only the dry pump be turned on? Should I keep it dry and turn on all three pumps after one or two suction cycles? Is it scientific to run all three pumps during hot blowing, and only the drying pump during cold blowing?
We all use three pumps, with three pumps in operation for both hot blowing and cold blowing
Three units should be used to remove the heat from the gas with acid.
Thank you to teachers Zd520525 and chuanhengmpq for their guidance
During the hot blowing phase, since there is still SO3 in the system, three acid pumps must be operated to absorb it； During the cold blowing cooling phase, when the temperature of the gas entering the absorption tower is below 200 degrees (to protect the ceramic rings and mist eliminators), the absorption acid pumps can be shut down one after another.
During purging, the absorption tower can be bypassed