Film drawing evaporator with rotating liner

Abstract

The invention discloses a film drawing evaporator with a rotating liner in the field of polyester production devices, aiming to solve the problems of the prior art, such as poor film forming effect and low working efficiency of materials. The evaporator comprises a shell, and a vacuum pumping port is arranged on the shell, wherein one end at the top of the shell is provided with a feed inlet, andthe other end at the bottom of the shell is provided with a discharge outlet; the shell is internally provided with a roller extending from the lower side of the feed inlet to the upper side of the discharge outlet; the side face of the roller is provided with a baffle plate the surface of which is parallel to the axial line of the roller; a plurality of flow guide plates are arranged between thebottom of the roller and the inner wall of the shell, and a gap is preserved between the upper edges of the flow guide plates and the surface of the roller; the working surfaces of the flow guide plates occupy a certain circumferential angle of the inner wall of the shell and extend from the feed inlet direction to the discharge outlet direction; the baffle plate and the flow guide plates are allfixed to the inner wall of the shell; and a gap between the roller and the baffle plate is larger than the gap between the roller and the flow guide plates. The evaporator can promote a polymerization reaction, has high output and low energy consumption and can be applied to the productions of polyesters of PET, PEN, PBT, PTT, and the like.

Description

technical field [0001] The invention relates to a production equipment in the polyester industry, in particular to an evaporator used in polycondensation reaction. Background technique [0002] In the existing polyester production, as the polycondensation reaction proceeds, the viscosity of the material gradually increases. High-viscosity materials will hinder the rapid escape of reaction by-products and delay the progress of the reaction. It is necessary to make the material form a larger In this way, the by-products of the reaction can escape from the material smoothly, and the reaction can go on better. In order to keep the reaction going, at present, an evaporator is used. Its structure mainly includes a shell. The top of the shell is provided with a feed port and a vacuum pumping port. The bottom of the shell is provided with a discharge port. There are one or more pairs of relatively rotating pressure rollers under the mouth, and there is a gap between the pressure ro...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a technical solution of a pull-film evaporator with a rotating liner, aiming to solve the problems of poor film-forming effect and low work efficiency in the prior art

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