PROCESS FOR REMOVING DISSOLVED GAS FROM AN EVAPORATOR FEED STREAM

摘要

A method for treating produced water or a feedwater stream with an evaporator (34). The feedwater stream or produced water is directed to and through a deaerator (56) located upstream of the evaporator (34). Steam (23) produced by the evaporator is utilized to strip dissolved gases from the produced water or feedwater stream passing through the deaerator (56). To efficiently strip dissolved gases, the vapor pressure in the deaerator (56) is maintained at below atmospheric pressure and the produced water or feedwater stream is heated to a temperature greater than the saturated vapor temperature in the deaerator (56).