System for dry cleaning and separating-recovering waste plastics

A technology of dry purification, separation and recovery, which is applied in plastic recycling, recycling technology, drying, etc. It can solve the problems that different types of plastics cannot be sorted, and the humidity of the feed material should not be too high, so as to avoid winding and low energy consumption. Effect

Inactive Publication Date: 2008-10-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are also reports on dry cleaning process or equipment in the prior art (ZL20062008082.5; ZL200520102414.1; invention patent with application number 200610078012.1), there are still problems such as the feed humidity should not be too high, and different types of plastics cannot be sorted.

Method used

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  • System for dry cleaning and separating-recovering waste plastics
  • System for dry cleaning and separating-recovering waste plastics
  • System for dry cleaning and separating-recovering waste plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, the mixed plastic film with soil, food residue and other sundries is crushed into fragments with a diameter of 5mm-500mm, and then put into the drying separation section 12 of the separation and purification system through the feeding port 1, and the drying temperature is from room temperature to 150 ℃, hot air is the best heat source for drying, and it can also be waste flue gas or even superheated steam, which is blown in from the inlet end. When there is no external drying heat source, the heating section 2 can be used to heat the air as the heat source. The impurities attached to the surface of the plastic film in the drying separation section 12 fall off due to drying, separate from the plastic film, and fall through the holes 8 (≤15mm) on the pipeline. The ad hoc dry separation pipe section has two layers and is composed of inner pipe 13 and outer pipe 14, as attached figure 2 As shown, there are holes 8 on the 13 sections of the inner pi...

Embodiment 2

[0033] like figure 1 As shown, the mixed plastic film with soil, food residue and other sundries is crushed into fragments with a diameter of 5mm-500mm, and then put into the drying separation section 12 of the separation and purification system through the feeding port 1, and the drying temperature is from room temperature to 150 ℃, hot air is the best heat source for drying, and it can also be waste flue gas or even superheated steam, which is blown in from the inlet end. When there is no external drying heat source, the heating section 2 can be used to heat the air as the heat source. The impurities attached to the surface of the plastic film in the drying separation section 12 fall off due to drying, separate from the plastic film, and fall through the holes 8 (≤15mm) on the pipeline. The ad hoc dry separation pipe section has two layers and is composed of inner pipe 13 and outer pipe 14, as attached figure 2As shown, there are holes 8 on the 13 sections of the inner pip...

Embodiment 3

[0037] like figure 1 As shown, the mixed plastic film with soil, food residue and other sundries is crushed into fragments with a diameter of 5mm-500mm, and then put into the drying separation section 12 of the separation and purification system through the feeding port 1, and the drying temperature is from room temperature to 150 ℃, hot air is the best heat source for drying, and it can also be waste flue gas or even superheated steam, which is blown in from the inlet end. When there is no external drying heat source, the heating section 2 can be used to heat the air as the heat source. The impurities attached to the surface of the plastic film in the drying separation section 12 fall off due to drying, separate from the plastic film, and fall through the holes 8 (≤15mm) on the pipeline. The ad hoc dry separation pipe section has two layers and is composed of inner pipe 13 and outer pipe 14, as attached figure 2 As shown, there are holes 8 on the 13 sections of the inner pi...

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Abstract

The invention pertains to the technical field of recycling of renewable resources and relates to a waste plastics purification and separation recycling system by a dry process. The system comprises a charging port, an outside cyclone collector, an outside bag-typed collector, an inside cyclone collector, an inside bag-typed collector, a drying and separation section and a separator, wherein, the drying and separation section comprises an inner pipe on which eyeholes are evenly distributed and an outer pipe which is sheathed outside the inner pipe and the charging port is connected with an inlet of the inner pipe; the separator comprises an inlet, an elbow and a V-shaped outlet; in addition, the system also comprises two outlets, namely an external air duct pipe and an internal air duct pipe the angle between which is in the range of 10 to 120 degrees and the angle of deviation of a central line of the external air duct pipe against the horizontal line is in the range of -30 to 60 degrees; the outlet of the inner pipe is connected with the elbow by the inlet of the separator; the external air duct pipe is connected with the outside cyclone collector which is connected with the outside bag-typed collector by a pipe and the internal air duct pipe is connected with the inside cyclone collector which is connected with the inside bag-typed collector by a pipe. The system of the invention can ensure no secondary pollution due to generation of waste gas and water as well as no blockage in the system.

Description

technical field [0001] The invention belongs to the field of resource regeneration and utilization, and in particular relates to a system for dry purification, separation and recovery of waste plastics. Background technique [0002] Urban and rural domestic waste contains a large amount of plastic; in addition, industrial waste such as papermaking waste also contains a large amount of plastic. Plastics sorted from urban waste are often contaminated by food residues and ash; agricultural mulch films are often contaminated by soil after being discarded. These plastics have extremely high recycling value and can be used for regeneration granulation or oil refining. However, plastics are required to be relatively clean before granulation or oil refining, especially before granulation, they should be sorted, and different types of plastics cannot be granulated together. At present, the method of sorting and cleaning plastics is widely used to sort manually, and then crush and wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00F26B3/06
CPCY02W30/62
Inventor 陈德珍安恩科周恭明
Owner TONGJI UNIV
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