Boiling bed for pre-crystallization of polyester yarn production

Abstract

The invention discloses a boiling bed for pre-crystallization of polyester yarn production. The boiling bed comprises a machine body, a material box, a stirring shaft, a belt, an air inlet pipe, a heater, a motor and a control box. The invention solves the following problem: in a prior boiling bed, hot air only can be blown from bottom to top, and dust in the hot air cannot be filtered out, so that the dust in the hot air is stuck to polyethylene terephthalate (PET) slices, then the PET slices are polluted, and the quality of produced polyester yarn is influenced; meanwhile, the prior boilingbed is difficult in discharging, so that the PET slices after pre-crystallization are inconvenient to take out from the boiling bed; and during pre-crystallization of PET, the airflow velocity is uncontrollable, so that a part of PET slices are bonded to form blocks. Through improvement of the structure of the boiling bed, air blown into the boiling bed can be filtered by the boiling bed, so thata large amount of dust is prevented from adhering to the PET slices.

Description

technical field [0001] The invention relates to the technical field of polyester yarn production, in particular to a fluidized bed for polyester yarn production and pre-crystallization. Background technique [0002] During the production of polyester yarn, PET material needs to be sliced. Since the slices need to be heated to above 140°C during the drying process, the softening point of ordinary slices is very low. It will soften and stick when it is below 80°C, and it is easy to stick into blocks and block the drying. In order to increase the softening point of the slices, it is necessary to pre-crystallize the slices, and then improve the crystallinity of the slices, so that the softening point reaches about 200°C, so that the drying process can go smoothly. The method adopted during crystallization is to use the ebullating bed to blow hot air from bottom to top, so that the PFT slices are in a boiling state, and the slices are in rapid fluctuations, thereby avoiding the b...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of ebullating bed for polyester yarn production pre-crystallization, which aims to improve the existing ebullating bed which can only make the hot air blow from bottom to top, and cannot filter the dust in the hot air, thus causing The dust sticks to the PET slices, causing the PET slices to be polluted, which affects the quality of the produced polyester yarn. At the same time, the existing fluidized bed discharge is troublesome, which makes it inconvenient to take out the pre-crystallized PET slices from the fluidized bed. , and when the PET is pre-crystallized, the air velocity cannot be controlled, which will lead to the problem of some PET chips sticking into blocks

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