Abstract:

The delayed coker in Lanzhou Petrochemical Co. produces normally 5-8 t/h sour water with coke powder content (w) about an average of 0.2%. The powder is easy to be deposited on the trays of the acid water treatment device, resulting in sour water stripper tray jam and suspension of the unit. In order to solve the problem, the acid water treatment unit was revamped by adopting a powder removal technique. The coke powder removal rate reaches more than 91% after the revamping, leading to a long period running of downstream device.

Key words: delayed coking unit, sour water, coke powder, removal rate