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Polycondensation kettle for falling film outside vertical tube

A technology of polycondensation reaction and tube arrangement, which is applied in the direction of pressure vessels used in chemical processes, can solve the problems that the reaction of high-viscosity materials cannot be carried out, and achieve the effects of uniform film formation, improved reaction efficiency, and increased film-forming area

Active Publication Date: 2013-06-05
ZHEJIANG UNIFULL IND FIBER
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a tubular falling film polycondensation reactor outside the tube to solve the problem that the high-viscosity material reaction cannot be carried out in the prior art

Method used

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  • Polycondensation kettle for falling film outside vertical tube

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Embodiment Construction

[0012] A falling film polycondensation reaction kettle with tubes and tubes, comprising: a vertical shell 13, a head and a cone 7 connected to the upper and lower ends of the vertical shell 13 respectively, and the feed port 1 and the heating medium inlet 19 are located at On the top of the head, the discharge port 6 is located at the bottom of the cone 7, and the vacuum port 3 is located on the upper part of the vertical shell 13; the feed port 1 is directly connected to the lower tube plate 15 and the middle tube plate 17 through the pipeline The material buffer zone is connected; the tubes 12 are located in the center of the vertical shell 13, and there is at least one tube 12, which is connected to the middle tube plate 17 and communicated with the heating medium outlet 2; between the tubes 12 and the lower tube plate 15 There is an annular gap 14 between them, and the milling teeth are evenly arranged at the film-forming part of the annular gap 14; the central tube 11 in t...

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Abstract

The invention relates to a polycondensation kettle for a falling film outside a vertical tube. The kettle comprises a vertical casing (13); a head and a cone (7) are connected to the upper end and the lower end of the vertical casing (13) respectively; a feed inlet (1) and a heating medium inlet (19) are arranged at the top of the head; a discharge port (6) is arranged at the bottom of the cone (7); a vacuum pumping port (3) is arranged on the upper portion of the vertical casing (13); the feed inlet (1) is communicated with a buffer area between a lower tube plate (15) and a middle tube plate (17) through a pipeline; the vertical tube (12) is arranged in the center of the vertical casing (13), connected with the middle tube plate (17), and communicated with a heating medium outlet (2); and an annular gap (14) is reserved between the vertical tube (12) and the lower tube plate (15), and a central tube (11) arranged in the vertical tube (12) is communicated with the heating medium inlet (19). The polycondensation kettle has the advantages that the film formation of the materials is even, the reaction efficiency can be improved, and the kettle can be used for production of highly viscous polymers such as polyethylene terephthalate (PET).

Description

technical field [0001] The invention relates to a production equipment in the polyester industry, in particular to important equipment in the high-viscosity polyester 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 surface area in a vacuum state. The film is heated at the same time, so that the by-products can escape from the material smoothly, and the reaction can go on better. At present, the most commonly used is the horizontal disc type or squirrel cage type rotary reactor, and its structure mainly includes a horizontal cylindrical shell with a vacuum suction port on the upper part of the shell, and a feed port and an outlet on the bottom of the shell. The feed port is equipped with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/78B01J3/04
Inventor 茅惠新宋明根
Owner ZHEJIANG UNIFULL IND FIBER
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