Abstract:

This paper analyzes and finds out the reasons for the problems of process water system in the ethylene plant at SINOPEC Tianjin Company, including the decrease in overhead stripping steam in process water stripper, the drop in overhead temperature and the over high oil content of process water. The boiler in the process water stripper is treated to increase the overhead temperature, reduce the oil content of process water, avoid the pollution of sewage system, reduce the low-pressure steam makeup, reduce the energy consumption of ethylene plant, and reduce the blowdown of dilution steam.

Key words: process water stripper, reboiler plugging, oil content