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Recycling and regenerating process for waste textile containing polyester

A technology for waste textiles and processes, which is applied in the field of recycling and regeneration of polyester-containing waste textiles to achieve the effect of reducing the occurrence of side reactions and the formation of gels

Inactive Publication Date: 2016-11-16
ZHEJIANG LUYU ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of the best balance between quality and cost in the recycling process of existing polyester waste, and the recycling process does not produce pollution and does not consume a lot of water resources, this application provides a high-quality, high-efficiency, low-cost waste polyester Recycling process

Method used

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  • Recycling and regenerating process for waste textile containing polyester
  • Recycling and regenerating process for waste textile containing polyester
  • Recycling and regenerating process for waste textile containing polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The waste regeneration process of this embodiment, combined with figure 1 , the technological process is as follows: the collected waste is pulverized→rinsing, drying→measurement→alcoholysis kettle→filter 1→BHET intermediate kettle→filter 2→polycondensation 1→polycondensation 2→filter 3→final polycondensation→filter 4→cutting Granules or spinning, the specific process is as follows:

[0031] (1) Crushing adopts impact cutting, combined with Figure 4 When the collected waste silk passes through the high-speed rotating roller 1 in a thin layer, the inclined blade 11 set on the rotating roller 1 contacts the waste silk, and in the process of instantaneous high-speed passage, the waste silk is cut into pieces by the inclined blade The inclination angle β of the inclined blade 11 is preferably 100-130 °, as in the present embodiment, the inclination angle β is set to 125 °, and the rotating speed of the rotating roller 1 is controlled at 60rpm-600rpm, as in the present emb...

Embodiment 2

[0039] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference lies in: combining Figure 5 , the crushing adopts a reciprocating cutter, which includes a frame, a hopper, a pressing roller, a wire feeding wheel 4, a reciprocating knife plate 3, a fixed knife plate 2 and a driving mechanism for a moving knife. The hopper is located on the frame, and its One end is provided with a lifting arm, and the other end is located in front of the press roller, and feeds the press roller. The wire feed wheel 4 includes an upper wire feed wheel, a lower wire feed wheel and a wire feed wheel located between the upper wire feed wheel and the lower wire feed wheel. The conveyor belt, the upper wire feeding wheel and the lower wire feeding wheel are located behind the pressing roller, the two are connected by a conveyor belt, the fixed knife plate 2 is installed on the frame behind the lower wire feeding wheel, and the reciprocating knife plate...

Embodiment 3

[0042] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference lies in: combining Figure 6 , crushing adopts a rolling knife sharpening structure. In this rolling knife sharpening structure, the knife body 5 is a cylindrical structure, and several knife grooves are arranged along its outer wall. The groove extends from the outer wall of the cutter body 5 to the axis of the cutter body 5 (but does not reach the axis) to form a groove-like structure with a large outside and a small inside, and the depth of the groove is not greater than the radius of the cutter body 5; a cutter is installed in the groove 51, the cutter 51 is diamond-shaped, one corner is located in the knife groove, and the corresponding other corner protrudes outside the cutter body 5; the filter screen 6 is a semi-circular structure, which is wrapped on the outside of the cutter body 5 in an inclined manner, and the filter screen 6 is provided with a V-shaped ...

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Abstract

The invention relates to a recycling and regenerating process for waste textile containing polyester and belongs to the technical field of polyester waste. The collected waste is smashed, rinsed, filtered, dried and metered so that finished products can be formed. The waste is dried after being smashed, rinsed and filtered, the waste is metered and conveyed into an alcoholysis kettle to complete alcoholysis and then is conveyed into a BHET middle kettle to react, then the waste is conveyed into a polycondensation kettle to complete polycondensation, and the finished products are formed through final polycondensation; and according to the alcoholysis process, the temperature of mother liquid ranges from 210 DEG C to 250 DEG C, and the reaction time ranges from 30 min to 5 h; the whole processing process is divided into four-stage filtering, the first-time filtering is completed after alcoholysis, the second-time filtering is completed after the reaction of the BHET middle kettle, the third-time filtering is completed after polycondensation, and the fourth-time filtering is completed after the final polycondensation, filter elements for four-stage filtering are 10-50 microns, and the filtering precision is sequentially improved from the first-time filtering to the fourth-time filtering. The recycling and regenerating process for the waste textile containing polyester is applied to waste silk and other polyester products and has the beneficial effects of being low in cost, short in process, high in quality, free of pollution and the like.

Description

technical field [0001] The invention relates to a process for recycling waste textiles containing polyester, and belongs to the technical field of recycling polyester resources. Background technique [0002] Polyester-based materials have developed into the world's largest synthetic polymer material. As a petroleum-based synthetic polymer, its raw materials come from non-renewable petrochemical resources, and polyester is difficult to degrade in nature, which brings a greater crisis to the environment. The recycling of waste polyester is urgent, but the recycling of waste polyester should also be carried out in accordance with the principle of maximizing recycling and cleaning the recycling process. Polyester regeneration can be divided into physical method, physical chemical method, and chemical method regeneration. The physical method refers to recycling and regeneration through cutting, crushing, heating and melting. The degree of polymerization of recycled polyester is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00
CPCB29B17/00Y02W30/62
Inventor 刘雄曹文姚强石教学刘真陈琳琳高美萍
Owner ZHEJIANG LUYU ENVIRONMENTAL PROTECTION
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