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System for cleaning and reusing polyester or plastic fragments and technology of system

A technology of plastic fragments and polyester, applied in the direction of plastic recycling, recycling technology, mechanical material recycling, etc., can solve the problem of increased improper wear and tear of machinery and materials, large electricity, heat, and water energy, and large wear and tear of processing materials and mechanical structures. and other problems, to achieve the effect of reducing water consumption and sewage discharge, reducing power demand and high utilization rate of heat energy

Inactive Publication Date: 2015-02-18
CITY RECYCLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Rub the surface of polyester with high-intensity mechanical force, and use the means of grinding off the surface of the material to achieve the purpose of removing pollution and sticking. The removal of residual glue can achieve a certain degree of effect, but polyester bottle flakes are not regular Flat surface, so there are still dead corners that cannot be removed, and it has no effect on capillary cleaning
Moreover, this method consumes a lot of power, processing materials and mechanical structures.
[0008] 2. Wash by boiling at high temperature. Under high temperature conditions (100°C lower than the boiling point of water), some residual glue (hot-melt glue) will soften and be easy to detach, but not all residual glue applies to this principle. This method is not helpful for pores cleaning
The method of high-temperature boiling requires a lot of heat energy. Due to the characteristics of the process, the heat energy is not easy to recycle, resulting in a lot of waste
[0009] 3. Washing with organic chemical solvents is the method most likely to cause industrial safety accidents and environmental pollution, and it may be necessary to prepare 2 to 3 different solvents for different residual glue, and the process conditions are relatively complicated
It is possible to remove the existing capillary pollution, but the solvent itself causes secondary pollution and is not easy to remove
[0010] 4. Combined use of the above methods, only factors that magnify the shortcomings, still can not achieve the desired effect
Relatively, the consumed electricity, heat, and water energy are large, and the undue loss of machinery and materials also increases.

Method used

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  • System for cleaning and reusing polyester or plastic fragments and technology of system
  • System for cleaning and reusing polyester or plastic fragments and technology of system
  • System for cleaning and reusing polyester or plastic fragments and technology of system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] This embodiment provides a system for cleaning and reusing polyester or plastic debris. structured as figure 1 shown. Includes the following units:

[0078] 1. Wet crushing unit: used for wet crushing the polyester or plastic bottles that have been screened initially to obtain polyester or plastic fragments.

[0079] First, the recycled polyester or plastic bottles (heavy substances with a higher specific gravity than water except the polyester or plastic bottle caps and labels on the bottle body) that have been preliminarily screened are transported at a stable rate through the belt conveyor 1. Feed into the wet pulverizer 2, and use the cutting ability of the pulverizer to convert the large-volume polyester or plastic bottle body into polyester or plastic fragments of about 10-25mm, so as to achieve the purpose of volume reduction. Wet crushing is to inject water into the crushing chamber to crush polyester or plastic bottles, which is especially beneficial for pro...

Embodiment 2

[0115] This embodiment provides a process for washing and reusing polyester or plastic debris using the system described in Embodiment 1.

[0116] The process of washing and recycling polyester or plastic chips includes the following steps:

[0117] (1) Wet crushing: perform wet crushing on the preliminarily screened polyester or plastic bottles to obtain polyester or plastic fragments with a size of 10-25 mm, and perform dehydration treatment;

[0118] (2) Rubbing and washing treatment: rubbing polyester or plastic fragments, cleaning the main pollutants on polyester or plastic bottle flakes, adding detergent during rubbing and washing, and keeping the detergent / polyester or plastic fragments clean The dosage ratio is 80-150ml / kg, and the residence time of polyester or plastic chips in the kneading washing machine is 10-20 minutes. The kneading and washing machine runs at a constant speed of about 45rpm. It adopts continuous feeding and discharging. In terms of design, debris ...

Embodiment 3

[0126] Use the system described in Example 1 to carry out the cleaning process for PET wool flakes or oil bottle flakes, using Figure 4 The process flow shown, the specific process parameters can be freely selected according to the actual situation.

[0127] In this embodiment, raw flakes is a general term in the market, referring to PET bottle flakes that are directly crushed into flakes without washing; oil bottle flakes is a general term in the market, referring to bottle flakes directly crushed from edible oil PET bottles.

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Abstract

The invention relates to a system for cleaning and reusing polyester or plastic fragments and a technology of the system. The system comprises a wet type smashing unit, a rubbing unit, a soaking unit, a rinsing unit and a dehydrating unit, and further comprises a flushing water recycling unit, a washing agent recycling unit, a soaking agent recycling unit and a rinsing agent recycling unit. Compared with the prior art, a cleaning technology combining breakthrough static soaking and flexible rubbing is adopted, so that residual glue on the surface of polyester or a plastic and pollution in capillary holes can be thoroughly removed, and the regenerated polyester or plastic cleaning degree is greatly increased. Electric energy, heat energy and water energy can be greatly saved; furthermore, a washing liquid used by the whole system is subjected to high and low-concentration flow division; a high-concentration washing liquid can meet a zero-emission condition through a respective recycling unit, and a low-concentration washing liquid can be subjected to separation, clarification and circulating use through a respective recycling unit; therefore, the concentration of discharged water can be reduced, and effects of reducing emission and alleviating pollution are achieved.

Description

technical field [0001] The invention relates to a polyester or plastic bottle recovery process and its system, in particular to a polyester or plastic debris cleaning and reuse system and its process. Background technique [0002] With the explosion of the global population, the consumption of various polyester or plastic bottles has also increased significantly. Among them, the consumption of polyester (PET) bottles in the world has increased sharply due to the stable and excellent chemical properties of polyester and good physical properties. Faced with the sharp increase of waste polyester or plastic bottles, the industry of recycling waste polyester or plastic bottles urgently needs to promote the industrialization, scale and mechanization of waste polyester or plastic bottle recycling. Because the material of the body of the bottle is different from that of the label attached to the bottle and the bottle cap --- the bottle body is usually polyester or plastic, the cap ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29B17/04B29B17/02
CPCY02W30/52Y02W30/62
Inventor 刘承宗黄琼瑶
Owner CITY RECYCLING
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