我厂线性低密度聚乙烯装置采用流化床生产工艺，生产出聚乙烯粉末以后，再进入混炼机进行造粒。实际生产中，反应器出来的粉末经常有结块现象，为了保证粉料细致，用一台破块器将其粉碎，破块器是美国进口设备，其轴承采用带防尘盖的型式，由于防尘盖密封性能不好，造成粉末进 I plant linear low-density polyethylene plant using fluidized bed production process to produce polyethylene powder, and then into the mixer for granulation. Actual production, the reactor out of the powder often caking phenomenon, in order to ensure the fine powder, with a broken block to crush it, broken block is the United States imported equipment, the bearing with a dust cover type, due to Dust cover sealing performance is not good, resulting in powder into