Polyester production alcohol adding device based on gas thermal expansion and cold contraction

Abstract

The invention relates to the technical field of polyester production, and discloses a polyester production alcohol adding device based on gas thermal expansion and cold contraction. The polyester production alcohol adding device based on gas thermal expansion and cold contraction comprises a bottom frame; a reaction cylinder is fixedly mounted in the upper surface of the bottom frame; a heating block is fixedly mounted at the lower end in the reaction cylinder; a storage frame is fixedly mounted on the upper surface of the heating block; a pumping cylinder is fixedly mounted on the upper surface of the storage frame; a movable plate is slidably mounted in the pumping cylinder, a fixed pipe is fixedly mounted on the left side of the pumping cylinder, a fixed block is fixedly mounted on theleft side of the fixed pipe, the left side of the fixed pipe penetrates through and extends into the fixed block to be fixedly provided with a conveying cylinder, an expansion block is movably mountedat the lower end in the conveying cylinder, and a connecting block is fixedly mounted at the upper end of the expansion block. A rotating plate is adopted, the rotating plate can be effectively driven to move left and right when alcohol volatilizes and generated airflow impacts upwards, polyester can be stirred conveniently, and newly added alcohols can be better fused into polyester.

Description

technical field [0001] The invention relates to the technical field of polyester production, in particular to an alcohol adding device for polyester production based on thermal expansion and contraction of gas. Background technique [0002] Polyester is a general term for polymer compounds formed by dibasic or polybasic acids and dibasic or polyhydric alcohols. There are many kinds of polyesters synthesized by different raw materials and methods. They can be used in fibers, containers, coatings, engineering plastics , rubber and other different fields, the main varieties of existing polyester are polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, etc., with terephthalic acid and Polyethylene terephthalate, which is polycondensed from ethylene glycol, is the world's first industrialized and most widely used polyester product. [0003] At present, in the actual production of polyester, it is necessary to add some alcohols for esterifica...

AI Technical Summary

Problems solved by technology

However, since alcohols are volatile, the degree of polymerization of the esterification reaction decreases, the molecular weight of the polyester becomes smaller, and the viscosity becomes smaller, which directly affects the performance of the polyester and cured products.

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