Method for continuous drying regenerative piece of polyester bottle, and dedicated drying equipment

Abstract

A method for continuously drying regenerated polyester bottle sheet includes sending said bottle sheets to cyclone separator under common action of hot air fan and conveyer belt, dropping bottle sheets into insulated bunker after bottle sheet is separated from hot air, dropping bottle sheet in bunker onto another fan and conveyer belt combined unit to enter another circulation after bottle sheets are stored in said bunker for certain period and realizing purpose of drying by carrying out numbers of circulations. The device for realizing said method is also disclosed.

Description

technical field [0001] The invention relates to a drying method and special equipment for recycled polyester bottle flakes. Background technique [0002] During the recycling and regeneration process of recycled PET bottle flakes, cleaning and drying must be carried out to obtain relatively clean bottle flakes. The existing traditional drying method is to use a rotary drum vacuum dryer. [0003] The rotary drum vacuum dryer is a rotatable cylindrical container with a steam or heat transfer oil heating jacket on a bracket, and is equipped with a feeding port and a vacuum port. The principle of the drum vacuum dryer is to fill the bottle flakes into the drum container, heat and vacuumize. After a certain period of time, the bottle flakes will increase in temperature, and the moisture in them will be vacuumed away, so as to achieve the best drying effect. Purpose. This drying method is feasible and is a commonly used method at present. But there are following problems: 1, e...

AI Technical Summary

Problems solved by technology

But there are following problems: 1, energy consumption is high

Due to the vacuum inside the drum container and the heat medium outside, it is very heavy and consumes electric energy when rotating. At the same time, the power of the vacuum pump is also large, and the heated heat medium dissipates more heat. Several factors make the rotating drum Drum dryer energy consumption is high

2. Big potential safety hazard

The drum vacuum drying container is a pressure vessel and works in a rotating state, which is prone to leakage of high-temperature heat medium, causing personal injury or equipment damage

3. Uneven drying effect

Since the drum vacuum dryer works intermittently, it is necessary to use multiple machines to work at the same time to meet the needs. The working status of multiple dryers is different, which will inevitably lead to inconsistent drying states when they are discharged.

4. Many people are employed, and the labor intensity of workers is high

Drum dryers rely on manual filling and discharging. Workers operate at high temperatures with high labor intensity and high labor costs.

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