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Thin film type waste plastic recycling, reusing, washing and purifying method

A waste plastic and recycling technology, applied in the direction of plastic recycling, recycling technology, chemical instruments and methods, etc., can solve the problems of complex composition, large volume, difficulty in crushing, washing and purification, etc.

Active Publication Date: 2014-11-12
JIANGSU JINWO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the low bulk density, large volume, and complex composition of film-based waste plastics, it is especially difficult to crush, wash and purify, and consume a lot of water resources. The current recycling and regeneration field is mainly produced by individual households and small workshops, with simple equipment and small scale. cause secondary environmental pollution

Method used

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  • Thin film type waste plastic recycling, reusing, washing and purifying method
  • Thin film type waste plastic recycling, reusing, washing and purifying method

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Example 1: Agricultural mulch film waste plastic recycling

[0058] The materials mainly composed of agricultural film waste plastics are conveyed by the first conveying equipment 1 to the shredder 2, and are crushed into pieces with a side length of 20~50mm; The drum washing machine 4 washes and removes harmful impurities such as metal objects, stones and sand mixed in the tablet through the sediment pipe, and the sediment enters the solid waste treatment system with a washing concentration of 3%; after washing, the tablet and water flow into the multi-rotation Drum type washing and separating device 5, while injecting washing water from the upper water inlet of the multi-drum type washing and separating device, inject washing water with an upward flow rate of 0.3m / s from each lower water inlet, wash again and separate out the Light impurities, such as paper, etc. Then the plastic tablet and water are pumped together by the tablet pump 6 to the inclined screw dehydr...

Embodiment 2

[0060] Example 2: Recycling of woven bags of waste plastics

[0061] The materials mainly composed of woven bag waste plastics are conveyed to the shredder 2 by the first conveying equipment 1, and are crushed into pieces with a side length of 20~50mm; then the crushed pieces are conveyed to the Drum washing machine 4 washes and removes harmful impurities such as metal objects, stones and sand mixed in the tablet through the sediment pipe, and the sediment enters the solid waste treatment system with a washing concentration of 4%; after washing, the tablet and water flow into the multi- Drum type washing and separating device 5, when washing water is injected from the upper water inlet of the multi-drum type washing and separating device, washing water with an upward flow rate of 0.2m / s is injected from each lower water inlet, and the material containing Light impurities, such as paper, etc. Then the plastic tablet and water are pumped together by the tablet pump 6 to the i...

Embodiment 3

[0063] Example 3: Comprehensive utilization of solid waste in paper mills

[0064] The paper mill solid waste materials mainly composed of waste paper, polypropylene, polyethylene and other film waste plastics are transported from the first conveying equipment 1 to the shredder 2, and are shredded into pieces with a side length of 20~50mm; and then The second conveying equipment 3 transports the crushed material to the drum washing machine 4 for washing, and removes harmful impurities such as metal objects, stones and sand mixed in the material through the sediment pipe, and the sediment enters the solid waste treatment system for washing. The concentration is 5%; after washing, the tablet and water flow into the multi-drum washing and separating device 5 together, and the washing water is injected from the upper water inlet and each lower water inlet of the multi-drum washing and separating device at the same time. In the horizontal conveying direction of the mixed material...

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Abstract

The invention discloses a thin film type waste plastic recycling, reusing, washing and purifying system and method. The method comprises the steps that a shredding machine is adopted to shear waste materials with a mechanical shear, the waste materials are preliminarily washed, sedimentation is carried out, and heavy impurities are removed; then, the waste materials are washed through multiple stages of drums in a multi-drum washing separation device, the upgoing flowing speed of washing water injected from lower water inlets is controlled, light impurities mixed into the materials or different materials with different proportions are effectively removed or are extracted through washing, and a double-screw impregnator is utilized for shearing, kneading and evenly forming obtained plastic pieces into small pieces and particles to be dried and stored for standby. According to the thin film type waste plastic recycling, reusing, washing and purifying method and system, solid waste of a paper-making factory can be comprehensively utilized, waste paper fibers and waste plastic are respectively recycled and reused, automation and large-scale industrial production can be achieved, the rate of multipurpose utilization can reach more than 90%, water consumption can be reduced by 50% to 80% through washing water cyclic utilization, environmental pollution is reduced, production continuity is ensured, the production space is saved, and the thin film type waste plastic recycling, reusing, washing and purifying system and method are of remarkable significance.

Description

technical field [0001] The invention relates to a recycling, washing and purifying system and a washing and purifying method for waste plastics, in particular to a washing and purifying system and a washing and purifying method for recycling and reusing thin-film waste plastics. Background technique [0002] The development of the plastics industry has brought great benefits to mankind, but it has left endless troubles, namely "white pollution". Since there are plastic products, old plastics are inevitably produced, and as time goes by, more new raw materials are put into use, which makes waste plastics rise sharply. Because waste plastics are not easy to age and degrade at room temperature, white pollution is increasing day by day, causing serious damage to the ecological environment. [0003] The output and consumption of plastic products in my country rank first in the world. The per capita annual consumption of plastics is about 3 kg (8 kg per capita in developed countr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B03B5/66
CPCY02W30/62
Inventor 曹堪洲范刚华徐涛
Owner JIANGSU JINWO MACHINERY
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