Continuous take off technique and pressure control of polymerization reactors

摘要

A polymerization reactor system includes features for operating two or more reactors in series or parallel. The system includes a discharge line coupled to an outlet of a first polymerization reactor, a first conduit connecting the first polymerization reactor to a second polymerization reactor via the discharge line, a second conduit connecting the first polymerization reactor to a flashline apparatus via the discharge line, and a diverter valve coupling the first and second conduits to the discharge line. The diverter valve is configured to selectively open the discharge line to the first conduit and close the discharge line to the second conduit in a first valve state and to selectively open the discharge line to the second conduit and close the discharge line to the first conduit in a second valve state. The diverter valve is capable of switching between the first and second valve states.

主权项

1. A polymerization reactor system, comprising:
a discharge line coupled to an outlet of a first polymerization reactor; a first conduit connecting the first polymerization reactor to a second polymerization reactor via the discharge line; a second conduit connecting the first polymerization reactor to a flashline apparatus via the discharge line; a diluent supply path that diverges into a first flush path and a second flush path, wherein the first flush path is configured to controllably flow a diluent into the discharge line and wherein the second flush path is configured to controllably flow the diluent into the first conduit; a withdrawal conduit disposed along the first conduit and comprising a drain valve, wherein the withdrawal conduit and the drain valve are arranged such that when the drain valve is in an open state, contents of the first conduit are able to be flushed into the withdrawal conduit using the diluent from at least the second flush path; and a diverter valve coupling the first and second conduits to the discharge line, wherein the diverter valve is configured to selectively open the discharge line to the first conduit and close the discharge line to the second conduit in a first valve state, and is configured to selectively open the discharge line to the second conduit and close the discharge line to the first conduit in a second valve state, wherein the diverter valve is capable of switching between the first and second valve states.