| Abstract:In the evaporation crystallization process system（MVR）of salt production and wastewater treatment, due to the narrow working area of the steam compressor, it was easy to have problems of interlock protection and automatic control, such as liquid hammer, frequent surge, over large vibration value, etc. measures such as controlling the pressure and temperature at the outlet of the compressor, setting the anti surge early warning control program, surge screen alarm, and increasing the return pipeline were adopted on DCS. When compressor surge occured, DCS could automatically open surge valve by means of surge warning program or manually open surge valve by means of surge alarm screen, so as to avoid compressor surge and liquid hammer. |
