Abstract: Solid catalyst feeder is one of the core equipment in gas-phase polyethylene plant. In recent years, with the improvement of catalyst activity and the demand for high-grade polyethylene production represented by metallocene, new and higher requirements have been put forward for solid catalyst feed systems. Based on the engineering practice of a certain gas-phase polyethy-lene plant, this paper introduces the research and development process of skid-mounted solid catalyst feeder. It expounds the system composition, working principles, research and development points and application situation. During the R&D process, several key issues that restrict the performance of the equipment have been resolved and the localized production of the core equipment for polyethylene process has been achieved. This skid-mounted solid catalyst feeder has broad prospects for promotion and application, as well as good economic and social benefits.

Key words: skid-mountedlsolid catalyst feederlgas-phase processlpolyethylene plant