High-efficiency multi-section type final polycondensation reactor

Abstract

The invention relates to a high-efficiency multi-section type final polycondensation reactor. The reactor comprises a sealed transversal cylinder, wherein the cylinder is provided with a material inlet, a material outlet and an exhaust port; a drive shaft is arranged in the cylinder; the cylinder is divided into a low viscosity stirring section, a medium viscosity stirring section, a high viscosity stirring section and a temperature removing section in sequence from the end which is close to the material inlet to the end which is close to the material outlet; a combined hole plate is fixedly connected on the drive shaft positioned in the low viscosity stirring section; a basket type stirrer is fixedly connected on a drive shaft positioned in the medium viscosity stirring section; a plurality of drawing film round discs are fixedly connected on drive shafts which are positioned in the high viscosity stirring section and the temperature removing section; temperature removing medium channels which are communicated with each other are arranged in the drawing film round disc and the drive shaft in the temperature removing section; and the drive shaft is provided with an inlet and an outlet of the temperature removing medium channel. The reactor adds the temperature removing section before discharging materials, and is advantageous to control the temperature in the reactor in a better range so as to improve the reacting condition and improve the product quality.

Description

technical field [0001] The invention relates to a high-efficiency multi-stage final polycondensation reactor, and mainly relates to the technical field of producing polyethylene terephthalate (PET, commonly known as polyester). Background technique [0002] At present, the final polycondensation reactor used in the final polycondensation reaction process is a combined ring-disk structure. The reactor is equipped with a stretched film steel plate. During use, the PET melt forms two types of films: vertical film and parallel film. By adding The amount of liquid film is increased by parallel film, but although this kind of reactor is equipped with insulation jacket during the final polycondensation reaction process, it cannot accurately control the temperature of the material at the end of the reaction stage, and because the reactor itself is a large mechanical device, so The heat generated by mechanical friction cannot be underestimated. Excessive temperature in the reactor af...

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Problems solved by technology

[0002] At present, the final polycondensation reactor used in the final polycondensation reaction process is a combined ring-disk structure. The reactor is equipped with a stretched film steel plate. During use, the PET melt forms two types of films: vertical film and parallel film. By adding The amount of liquid film is increased by parallel film, but although this kind of reactor is equipped with insulation jacket during the final polycondensation reaction process, it cannot accurately control the temperature of the material at the end of the reaction stage, and because the reactor itself is a large mechanical device, so The heat generated by mechanical friction should not be underestimated. Excessive temperature in the reactor will affect the reaction stability of the material, thereby affecting the final polycondensation effect

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