Extrusion Granulator Unit Long Period Running Research

China Petroleum and chemical industry’s rapid development, polyethylene and polypropylene and other chemical products production scale has expanded each year, but the key equipment in the production process of the extrusion granulation unit has been dependent on foreign imported product. The only German W·P company, Japan Kobe Steel Company, the Japanese steel Company has a large twin-screw extrusion granulator unit design, manufacture, installation and debugging technology. China’s polypropylene and polyethylene to produce device using large extrusion granulator unit almost entirely from the three manufacturers of the equipment. Yan’an petrochemical plant’s 200,000 tons per year polypropylene plant to install the equipment and often unplanned downtime, resulting in high labor intensity of the operator of the unit, accessories wear fast, the economic benefits of the device. Firstly, described the importance of the extrusion granulation unit in polypropylene production process system then analyzes the composition of the crew and the formation of downtime, focus on the three main reasons caused the shutdown of the unit: ①Process Systems reasons,② instrument failure③ unit ontology reasons, in-depth analysis and propose appropriate solutions. After nearly a year of practice, the number of unplanned downtime is significantly reduced, the operation cycle of growth, both to improve the economic efficiency, reduce the labor intensity of workers, but also to extend the operation cycle of 200,000 tons/ year polypropylene unit.efinery and petrochemical plant to install the equipment often appears after unplanned downtime, unit investment cost is high, parts are expensive, difficult operation and maintenance, stable and reliable oper ation of unit long period on the whole stable plant production is crucial, not only can improve economic efficiency, but also can reduce the labor intensity of the workers, it is necessary to machine the long period operation the method discussed and summarized, in order to improve the operation level of oil refining and chemical plant.