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Flow-velocity-decreasing multi-drum type film waste plastic recycling method

A waste plastic, drum-type technology, applied in the direction of plastic recycling, recycling technology, etc., can solve the problems of complex components, large volume, broken and difficult cleaning and purification

Active Publication Date: 2016-07-06
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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  • Flow-velocity-decreasing multi-drum type film waste plastic recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: Recycling of agricultural mulch film waste plastics

[0057] 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 20-50 mm; 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 deh...

Embodiment 2

[0059] Example 2: Recycling of woven bag waste plastics

[0060] The material mainly consisting of woven bag waste plastics is conveyed to the shredder 2 by the first conveying equipment 1, and is crushed into pieces with a side length of 20-50 mm; then the crushed pieces are conveyed to the Drum washing machine 4 washes and removes harmful impurities such as metal objects, stones and sand particles 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 multiple 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...

Embodiment 3

[0062] Example 3: Recycling and comprehensive utilization of solid waste in paper mills

[0063] The paper mill solid waste materials mainly composed of waste paper, polypropylene, polyethylene and other film-type waste plastics are transported from the first conveying equipment 1 to the shredder 2, and are shredded into pieces with a side length of 20-50 mm; 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 simultaneously injected from the upper water inlet and each lower water inlet of the multi-drum washing and separating device. In the horizontal conveying direction of th...

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Abstract

The invention discloses a flow-velocity-decreasing multi-drum type film waste plastic recycling method. The flow-velocity-decreasing multi-drum type film waste plastic recycling method is characterized by comprising the following steps: shearing waste materials by a shredding machine via mechanical shears, preliminarily washing the sheared waste materials, and settling the the washed waste materials to remove heavy impurities; then, washing the waste materials through a multi-stage drum in a multi-drum type washing and separating device, controlling upward flow velocity of washing water injected from each lower water inlet, effectively removing light impurities mixed in the materials or separating out different materials with specific gravity difference by washing and separating; shearing, rubbing and leveling obtained plastic sheets into small sheets and aggregate particles by a double-screw impregnation machine; and drying and storing the small sheets and aggregate particles for later use. The method and a system can realize comprehensively utilizing solid wastes of a paper mill and recycling waste paper fibers and waste plastic separately, and can realize automatic and large-scale automatic production, wherein a comprehensive utilization rate can be 90% or higher; and moreover, water consumption can be reduced by 50-80% by circulating washing water, so that environmental pollution is reduced, production continuity is guaranteed, the production space is saved, and the significance is remarkable.

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): B29B17/00
CPCB29B17/00B29B2017/0015Y02W30/62
Inventor 曹堪洲范刚华徐涛
Owner JIANGSU JINWO MACHINERY
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