Polymeric reactor and polyester production method

Abstract

The invention discloses a polymeric reactor and a polyester production method. The polymeric reactor comprises a closed horizontal cylinder. A front end rotating shaft is arranged at the portion, close to a material inlet, inside the cylinder. One end of the front end rotating shaft stretches out from the cylinder and is connected with a first power device. A rear end rotating shaft is arranged at the portion, close to a material outlet, of the cylinder, and one end of the rear end rotating shaft stretches out from the cylinder and is connected with a second power device. A supporting structure for supporting the front end rotating shaft and the rear end rotating shaft is arranged inside the cylinder. A cage frame type stirrer is arranged on the front end rotating shaft. A section of screw-type disc is arranged at the portion, close to the front end rotating shaft, of the rear end rotating shaft. A plurality of sets of coaxial circular rings are arranged at the other parts of the rear end rotating shaft. A plurality of scrapers parallel to the faces of the circular rings are arranged among the circular rings. According to the method, the polymeric reactor is used for performing polyester production to obtain a high-viscosity polyester melt. The cage frame type stirrer is arranged at the front end, the multiple circular rings are arranged at the rear end, and the devolatilization efficiency of equipment can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of polyester production, relates to an important equipment for polyester production, in particular to a polymerization reactor and a polyester production method for polyester production. Background technique [0002] Polymerization reactor is an important equipment for polyester production. The Chinese patent (CN201020175319.5) with the publication number CN201684605U discloses a combined polymerization reactor in the field of polyester production equipment, which includes a sealed horizontal cylinder, one end of which is provided with a material inlet, and the other end A material outlet is provided, a gas phase outlet is provided on the top of the cylinder, a rotating shaft 1 is provided in the cylinder, and multiple groups of discs are arranged on the rotating shaft 1, and the end of the rotating shaft 1 protrudes from one end of the cylinder; the rotating shaft 1 is set At one end of the material inlet;...

AI Technical Summary

Problems solved by technology

[0003] The aforementioned CN201020175319.5 patent has the defect of low devolatilization efficiency in the actual production and use process. The reasons are as follows: According to the distribution of materials in the polymerization reactor, the viscosity of the materials at the front end of the equipment is small and the fluidity is good. The greater the viscosity, the worse the fluidity; because the first rotating shaft at the front end is a multi-set disc, and the second rotating shaft at the rear end is a squirrel-cage agitator; in the polymerization reactor, the low-viscosity material at the front end will be on the disc. Fast flow rate, small film forming area and short time. At the same time, due to the good fluidity of the material itself, it is difficult to form an effective film on the upper part of the disc and the partition due to the action of gravity, resulting in low devolatilization efficiency; and Due to the complex internal components of the squirrel cage agitator, it is difficult for the high-viscosity material at the rear end to flow down and form a film on it only by its own weight

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