Slurry or liquid catalyst feeding device

Abstract

The invention relates to a slurry or liquid catalyst feeder, which comprises slurry or liquid catalyst pot, transmission pump, at least one six-way valve and quantitative tube. Wherein, the transmission pump via tube is connected to the catalyst pot and the six-way valve, to transmit the slurry or liquid catalyst to the quantitative tube between two connectors of six-way valve, then via the six-way valve to be circulated to the catalyst pot; when feeding material, the six-way valve operates one time, and the catalyst slurry or liquid of quantitative tube will be fed to the polymerization reaction system via the inertia gas at another connector of six-way valve. Said invention can be used in olefin polymerization reaction, with linear adjustment and wide adjust range.

Description

[0001] The invention relates to a slurry or liquid catalyst feeding device, which can be widely used in olefin polymerization reaction process. technical background [0002] As we all know, most of the catalysts currently used in olefin polymerization in industry are solid particle type. There are usually two ways to feed solid catalysts. One is to directly add a set of specially designed complex catalyst feeding devices, such as in the Unipol polyethylene process. The solid catalyst feeding device used on the device; the second is to prepare the catalyst into a certain concentration of slurry or paste through a complicated process, and then send it into the polymerization reactor with a complicated metering and feeding system. In the above two methods, the equipment investment of the former is very high, and there is no accurate and effective method to know the catalyst stock in the feeder. The latter operation process is extremely complicated, and the preparation of a single...

AI Technical Summary

Problems solved by technology

However, the sealing performance of the feeder is poor, because the catalyst enters the feeding port by gravity sedimentation, and the dispersion of the slurry liquid catalyst is uneven, which affects the reaction speed; at the same time, the catalyst enters the reactor in a non-atomized state, which is easy to cause reaction agglomeration

Another example is the slurry or liquid catalyst feeding device provided in Chinese patent 02269754, which mainly includes a catalyst feeding tank, a micro-feeder connected thereto, a hydraulic oil control system, and an atomizing nozzle. Although the feeding system can realize slurry or liquid catalyst Stable and continuous feeding, but there are also problems such as the catalyst is easy to settle in the delivery pipeline and the concentration changes, so it affects the accuracy of feeding, which in turn affects the stability of the polymerization reaction

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