Novel high-viscosity final polycondensation reactor

Abstract

The invention belongs to the technical field of chemical equipment and relates to a novel high-viscosity final polycondensation reactor. The reactor sequentially comprises a transmission end, a left end cover, a feeding port, a front drum section, a ring seat, a bearing seat, a drum middle flange, a discharging port, a rear drum section, a right end cover, mechanical seal and a supporting frame. The reactor is characterized in that two stirring devices different in rotation speed are arranged in a drum, one of the stirring devices is a cage stirrer arranged in the front drum section, and the other stirring device is a disc stirrer with an inclination scraper and is arranged in the rear drum section. Two half pad bearings are arranged in the middle of the drum to support the two stirring devices, and reinforcement rings are arranged on the drum. The novel high-viscosity final polycondensation reactor has the advantage that by integration of an original final polycondensation reactor and a tackifying reactor, production cost reduction, production efficiency improvement, energy saving, environment friendliness and high market competitiveness are realized.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a novel high-viscosity final polycondensation kettle. It can produce PET to meet the production of various polymer materials such as PBT and PTT. Background technique [0002] The final polycondensation reactor is the key equipment in the production of polyester. There is only a single stirring device in the traditional final polycondensation reactor. The reaction, and the film is pulled through the agitator mesh to increase the viscosity of the material. After the polymer stays in the reactor for a certain period of time, the polymer melt that meets the product index requirements is pumped out from the outlet by the melt discharge pump. [0003] The viscosity of the traditional final polycondensation reactor is relatively high near the discharge port. When it is necessary to obtain a higher viscosity product, it is necessary to change the stirring struct...

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Problems solved by technology

The equipment cost of this solution is large, and the heat loss will be lost during the material transfer process, which will increase the operating cost, which is not conducive to energy saving and environmental protection.

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