Paper 11: Special Features in Reciprocating Compressors for Polyethylene Production

Abstract

Pressures of 1000–3500 atm are necessary for the production of polyethylene at low density. These pressures are achieved using reciprocating compressors. The main problems concerned with their construction are the endurance limits of the components subjected to high pressure, the sliding seal between piston and cylinder, and the concentricity of thrust given to the piston by the mechanisms. These problems have been overcome by the use of special materials such as tungsten carbide and by the application of advanced design techniques.