POLYETHYLENE PRODUCTION WITH MULTIPLE POLYMERIZATION REACTORS

摘要

A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.

主权项

1. A method of operating a polyethylene reactor system, comprising:
discharging continuously a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry comprising diluent and a first polyethylene; discharging a product slurry from a second polymerization reactor, the product slurry comprising diluent, the first polyethylene, and a second polyethylene; determining a pressure loss due to friction in the transfer line; and adjusting a process variable in response to the pressure loss exceeding a specified value.