A slurry outside circulation facility for polyethylene manufacture is disclosed here. The scheme adopted is that slurry inside the polymerization reactor is extracted from the bottom, pumped into a slurry cooler and then transmitted back into the polymerization reactor. The heat of slurry is removed by circular cooling outside the polymerization reactor, which increases the heat-exchange area and helps remove a part of the reaction heat generated during polymerization. By increasing the mass of polymerized polyethylene, the production capacity of original facilities can be promoted by over 50%. Compared to former technological alteration, the slurry outside circulation facility for polyethylene manufacture has the advantages of low investment cost, same area, low alteration period and convenient implementation. |