Sectional polyester chip solid phase viscosity-increasing reactor

Abstract

The invention relates to a polyester chip solid-phase viscosity increasing device, in particular to a sectional type polyester chip solid-phase viscosity increasing reactor used in continuous polyester chip solid-phase viscosity increasing production equipment. The sectional type polyester chip solid-phase viscosity increasing reactor comprises a vertical reaction tower and a material inlet, a material outlet, an air inlet and an air outlet which are arranged on the reaction tower, wherein, the reaction tower is provided with reactor sections from the top down; a reaction tower shell of each reactor section is provided with an inlet air distribution cavity and an exhaust air collection cavity; the inside of the reaction tower corresponding to the reaction tower shell is provided with an air inlet pipe and an air outlet pipe; the air inlet pipe and the air outlet pipe are arranged on holes on the sidewall of the reaction tower which are matched with the air inlet pipe and the air outlet pipe; the air outlet pipe is arranged above the air inlet pipe; the lower sides of the air inlet pipe and the air outlet pipe are provided with open slots; and air channels are arranged between the reactor sections. The sectional type polyester chip solid-phase viscosity increasing reactor has a reasonable structure, uniform heating and high heat exchange efficiency, can not cause retention and agglomeration of materials, and can achieve the obvious viscosity increasing effect.

Description

technical field [0001] The invention relates to a polyester chip solid-phase thickening device, in particular to a segmented polyester chip solid-phase thickening reactor used in continuous polyester chip solid-phase thickening production equipment. Background technique [0002] The reactors in the current continuous polyester chip solid phase thickening production equipment mostly use large vertical reactors. The types of these reactors can be roughly divided into the following two categories: one is packed reactors; the other is triangular tube roof reactors. But there are some problems. [0003] The packed reactor uses inert gas such as nitrogen as the heating medium. Gas is blown in from the bottom of the reactor to transfer heat to the material. During the production process, the material below the inside of the reactor is under the pressure of the material above it due to gravity. Especially the material at the bottom of the reactor will bear the pressure of almos...

AI Technical Summary

Problems solved by technology

But the problem with this kind of reactor is: firstly, the heat exchange between the material and the air duct depends on the contact heat transfer between the air duct wall and the material, that is, the heat exchange between the solids is carried out.

The heat transfer coefficient is small and the heat transfer efficiency is low

At the same time, since the reaction material is a solid particle, the temperature of the material that directly contacts the air duct is different from that of the material that does not directly contact the air duct, and the reaction cannot be carried out uniformly and synchronously.

Moreover, the material will escape part of the gas during the reaction, and the existence of these gases will slow down the reaction.

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