Method for controlling SSP solid phase polycondensation device main reactor material position height

Abstract

A method for controlling material level of a main reactor of an SSP solid phase polycondensation apparatus is provided for solving conventional problems of large error and low speed of calculation resulting in incapability of in-time and accurate adjustment of the material level of the main reactor, and further, influence to stability of product viscosity. The method comprises: detecting the viscosity Eta1 of the product, which is inputted to a reaction activity computing module for computing the current reaction activity Gamma, and transmitting the computed reaction activity Gamma to a material level display control module and computing the material level h of the main reactor corresponding with the reaction activity, meanwhile adjusting the rotating speed of a rotary valve to adjust the height of the material level. After the material level is adjusted to be the required value, the material level display control module controls the rotary valve back to the primary speed. The invention has the beneficial effect of fast and correctly adjusting the height of material level of the main reactor, thereby stabilizing the viscosity of the product and advancing the quality of the product.

Description

technical field [0001] The invention relates to the field of polyester production, in particular to a method for controlling the material level height of a main reactor of an SSP solid-phase polycondensation device at a high temperature in a polyester SSP device. Background technique [0002] The main reactor of the SSP solid-state polycondensation device includes a reactor with a feed pipe on the top of the reactor, a discharge pipe on the bottom of the reactor, a level gauge inside the reactor, and a rotary valve on the main discharge pipe. When the SSP solid-phase polycondensation device produces polyester, increasing the material level of the main reactor can increase the reactivity, and reducing the material level of the main reactor can reduce the reactivity, and the level of reactivity will affect the stability of the viscosity of the polyester product and affect The quality of the product can be obtained by timely and accurately adjusting the material level of the ma...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for controlling the height of the main reactor material level of the SSP solid-phase polycondensation device, which solves the problem of large calculation error and slow speed of the existing method for controlling the material level height of the main reactor of the SSP solid-phase polycondensation device, and then cannot Timely and accurate adjustment of the material level of the main reactor affects the stability of the product viscosity

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