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大庆石油化工总厂使用在聚乙烯浆液固、液相分离的M-301、M-2301螺旋沉降离心机(日本产),其主要技术参数为:转鼓直径φ1000mm;转鼓长度l500mm;外转鼓转速1450r/min,内转鼓转速1432r/min;介质为聚合物和已烷;机内设计压力0.3kg/cm~2;机内设计温度80℃;加料量40t/h;液固比为液体30t/固体10t。离心机原机械密封的结构如图1所示。原设计在机械密封外壳静环背有1个φ4的小孔,小孔的作用是注入冲洗液(每小时300l,压力3kg),在反向叶轮作用下,将冲洗液分
The main technical parameters of Daqing Petrochemical Plant are M-301 and M-2301 Spiral Settling Centrifuge (solid product, liquid phase separation) in polyethylene slurry, the main technical parameters are: drum diameter φ1000mm; drum length l500mm; Drum speed 1450r / min, inner drum speed 1432r / min; medium for polymer and hexane; machine design pressure 0.3kg / cm ~ 2; machine design temperature 80 ℃; feeding amount 40t / h; Liquid 30t / solid 10t. Centrifuge mechanical seal the original structure shown in Figure 1. The original design of the mechanical seal shell static ring back a φ4 small holes, the role of small holes is injected into the washing liquid (300l per hour, pressure 3kg), the role of the reverse impeller, the washing liquid points