Modernization of equipment for transportation of polypropylene

Abstract

The article considers the operation principle of the Roots-type gas blowers. The diagram of the airflows from the blower is illustrated. A detailed description of the technological process of gas compression is given. The main actual defects of equipment such as blowers during operation are listed. Repair of equipment includes, as a rule, dismantling, complete disassembly of the flow part of the case and impellers with cleaning from the polymer, replacement of the rotary piston, cleaning tensioned metal points, replacement of rolling bearings and seal rings, as well as turning and mechanical works. The reasons for the defects are considered. Industrial rotary gas blowers transport polypropylene (powder) for its further processing in an adjacent production shop and are important for the shop operation as a whole. During operation, when the ambient temperature exceeds 40°C, heating of the parts and mechanisms of the gas blower exceeds 85°C, which affects the operation of the equipment. It is proposed to use the throttle effect to reduce the gas temperature at the suction stage of the gas blower without using the heat exchange equipment in the technological process. The principle of the Joule-Thompson throttle effect is described. Physical substantiation of the temperature effect of throttling is given, which consists in the ratio of changes in the internal kinetic and internal potential energy of the gas flowing. An inversion curve plot for nitrogen is shown. A list of measures for the maintenance and repair of equipment for pneumatic transportation of polypropylene (powder) is presented.