Production plant of outside loop for slurry of polyethylene

Abstract

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.

Description

technical field [0001] The invention relates to a polyethylene production device, in particular to a polyethylene slurry external circulation production device. Background technique [0002] The equipment for producing polyethylene by slurry method includes a polymerization reactor, a dilution tank connected to the output of the polymerization reactor, a flash tank connected to the bottom of the dilution tank, a flash tank condenser connected to the flash tank and slurry Pump. In the prior art, after the device is put into production, its production capacity is basically determined. If it is necessary to increase the output, it is necessary to increase the production line, that is, add a new parallel polymerization reactor. The investment cost of this kind of transformation is relatively large, and the equipment layout of many existing devices has been determined, so there is no space to add new production lines and equipment. Contents of the invention [0003] In order...

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Problems solved by technology

The investment cost of this kind of transformation is relatively large, and the equipment layout of many existing devices has been determined, so there is no space to add new production lines and equipment

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