A method for post-treatment of polyphenylene ether slurry

By combining a rotary pressure filter, a steam tube rotary dryer, and a shaftless screw conveyor, the solid-liquid separation and tail gas treatment of polyphenylene ether slurry were optimized, solving the problems of complex processes, high energy consumption, and clogging in existing technologies. This resulted in efficient and safe slurry processing, ensuring product quality and system stability.

CN116496487BActive Publication Date: 2026-06-30TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO LTD
Filing Date
2023-04-17
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing polyphenylene ether slurry post-processing technologies suffer from problems such as complex processes, high energy consumption, high maintenance costs, and susceptibility to product quality issues, especially in solid-liquid separation and exhaust gas treatment, where blockages and quality instability are common problems.

Method used

A rotary pressure filter is used for solid-liquid separation, combined with a steam tube rotary dryer and a shaftless screw conveyor. Nitrogen purging and a scrubbing tower are used for tail gas treatment, optimizing the washing and drying process and reducing energy consumption and clogging risks.

Benefits of technology

It achieves efficient, safe, and stable processing of polyphenylene ether slurry, reduces energy consumption and methanol solvent usage, improves product quality and long-term operational stability of the system, and avoids equipment blockage and quality problems.

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Abstract

This invention relates to the field of slurry treatment technology in the new materials industry, and particularly to a method for post-treatment of polyphenylene ether slurry. This invention effectively reduces energy consumption by employing a combination of rotary pressure filter, steam tube rotary dryer, shaftless reverse thrust screw, and washing tower. The application of solid-liquid separation technology in the rotary pressure filter results in better decolorization and higher product quality. The application of steam tube rotary dryer technology reduces drying exhaust gas and makes the equipment operation more stable. The application of shaftless reverse thrust screw and washing exhaust gas dust removal technology effectively solves the problem of blockage in the exhaust gas treatment system, making the system more reliable for long-term operation.
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