Multifunctional antistatic agent feeding device capable of achieving continuous injection and accurate metering

By using a combination of an antistatic agent dilution tank, a nitrogen generator, and a metering pump in the gas-phase olefin polymerization process, the problem of continuous injection and accurate metering of the antistatic agent was solved, achieving accurate metering and continuous feeding of the antistatic agent and improving the stability and safety of the reaction.

CN224474974UActive Publication Date: 2026-07-10SHANGHAI LEADER CATALYST
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Patent Information

Application Number
CN202521475648.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-15
Publication Date
2026-07-10
Estimated Expiration
2035-07-15

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve continuous injection and precise metering of antistatic agents in gas-phase olefin polymerization processes, which affects the stability of the polymerization reaction and may even lead to plant shutdown.

Method used

A combination device consisting of an antistatic agent dilution tank, a nitrogen generator, a stirrer, and a metering pump is used to continuously and accurately add the antistatic agent after removing water and oxygen through bubbling. This device is suitable for antistatic agents with different physical properties and is precisely delivered using a screw pump or a diaphragm pump.

Benefits of technology

It enables precise metering and continuous feeding of antistatic agents, improves the stability and safety of the reaction, avoids side reactions caused by static fluctuations and impurities, and meets the requirements of gas-phase olefin polymerization process.

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Abstract

The utility model relates to a multifunctional antistatic agent feeding device capable of continuously injecting and accurately metering, which comprises an antistatic agent diluting tank used for receiving and mixing a high-viscosity first antistatic agent and a diluting agent to form a first antistatic agent diluted solution; the drum nitrogen generator is connected to the antistatic agent diluting tank and is used for bubbling the first antistatic agent diluting solution to remove water and oxygen; the antistatic agent feeding tank is connected with the antistatic agent diluting tank and is used for receiving the first antistatic agent diluted solution subjected to water and oxygen removal or directly receiving a second antistatic agent; the stirrer is arranged in the antistatic agent feeding tank and is used for keeping the uniformity of the solution; and the metering pump is connected to the antistatic agent feeding tank and is used for accurately metering and conveying the antistatic agent solution to the reactor. Compared with the prior art, the device has the advantages that accurate metering and continuous feeding are realized; multifunctional compatibility is achieved, and antistatic agents with different physical properties are adapted; the reaction safety is improved, and the like.
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