Condensation method for styrene thermoplastic elastomer solution

Abstract

The invention relates to the field of rubber product preparation, and discloses a condensation method for a styrene thermoplastic elastomer solution, which comprises the following steps of sequentially sending a heterogeneous mixture into a first condensation kettle and a second condensation kettle to remove a solvent. The post-treatment circulating hot water B and steam are subjected to first heat exchange to obtain superheated water and first steam condensate water, the superheated water is fed into a first condensation kettle from the bottom of the first condensation kettle, and the heterogeneous mixture is obtained by mixing the post-treatment circulating hot water A and a styrene thermoplastic elastomer solution. According to the method provided by the invention, steam does not completely enter the condensation kettle any more, but exchanges heat with part of circulating hot water, so that the circulating hot water is changed into superheated water to enter the condensation kettle, the condensation effect of the condensation kettle is ensured, meanwhile, the sewage discharge capacity is reduced, the environmental protection requirement is met, and the subsequent sewage treatment cost is reduced.

Description

technical field [0001] The invention relates to the field of rubber product preparation, in particular to a coagulation method for a styrene thermoplastic elastomer solution. Background technique [0002] The solvent removal process of the solution polymerization synthesis device adopts the condensation process of double-tank series water analysis method based on the principle of steam distillation and wet degassing. In the traditional process design, the heat supply method of this process is the direct heat supply of water vapor. This route has a simple process and high heat utilization efficiency. The same amount of oily sewage must be discharged from the system. The limitations of this process are increasingly reflected in today's increasingly stringent pollution discharge quantities and standards for chemical production equipment. Contents of the invention [0003] The purpose of the present invention is to improve the sewage discharge of the device. Under the premise...

AI Technical Summary

Problems solved by technology

In the traditional process design, the heat supply method of this process is the direct heating of water vapor. This route has a simple process and high heat utilization efficiency. The same amount of oily sewage must be discharged from the system. In today's increasingly stringent pollution discharge quantity and standards for chemical production equipment, the limitations of this process are increasingly reflected.

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