Abstract:

This article introduces the temperature anomalies at the second stage exit of flash gas compressor. Based on the working principle of reciprocating compressor and valve volume regulating mechanism, the airtightness of compressor air valve, the wear of piston rings, the ovality of cylinder liner and the scale of cylinder water jacket were checked. The effect of air valve scaling on temperature was eliminated, and the relative dimensions of the valve assembly were measured. It was determined that the pneumatic valve stem at the second stage inlet restricted the movement of valve plate, so that the air valve plate could not be closed normally. The position change of valve volume regulating mechanism was the fundamental cause of the abnormal temperature rise in the second stage. The corrosion of valve cage and the excessive tightening force of valve gland bolts caused the deformation of valve cage, resulting in the position change of valve volume regulating mechanism. The failure was removed by changing the thickness of gasket between valve cage and air valve, replacing the valve plate, cleaning the water jacket and repairing the internal circulating water pump, and some solutions were put forward to prevent the deformation of valve cage.

Key words:  ')">

 , reciprocating compressor, temperature anomaly, analysis, treatment