Process and apparatus for introducing a solid into a reactor

摘要

A process and an apparatus introduce fine particles of a solid into a reactor with the help of a feed enclosure connected to the reactor through an injection pipe. The process comprises (a) introducing the solid into the feed enclosure wherein most of the solid particles settle at rest and then (b) introducing a gas into the feed enclosure so that the solid particles are suspended by the gas to form a solid particle suspension entrained in a dilute-phase conveying system by the gas into the reactor through the injection pipe. The invention is particularly useful for introducing particles of a solid catalyst into a gas-phase polymerization reactor.