Waste cotton-polyester blended fabric component separation method

Abstract

The invention discloses a waste cotton-polyester blended fabric component separation method, adopting a horizontal type rotation alcoholysis separation device. The device comprises an outer barrel with a heating device, and a rotatable inner barrel with a filter net; the outer barrel is connected with a reflux condensing device, a motor and a vacuum system. The method comprises the following steps: a waste cotton-polyester blended fabric is put into the inner barrel, and an alcoholysis agent, a catalyst and the like are added into the outer barrel; the material in the inner barrel and the alcoholysis agent make alcoholysis reaction in a rotation state; after alcoholysis is finished, the material is spin-dried in the inner barrel by centrifugation, and a liquid alcoholysate is discharged out along; after centrifugation is finished, a vacuum condensing system is started to distill off and recycle a small amount of the residual alcoholysis agent in the material in a negative pressure state, and then solid cotton yarn remained after alcoholysis separation is pushed out by a mechanical pushing rod. According to the method, stirring is not needed, so the problem of performance loss caused by twining and stirring of the remanent cotton yarn is solved; besides, the problems of the alcoholysis agent remained in the remanent cotton yarn, discharge difficulty and the like are solved, thus efficiently and conveniently separating and recycling waste cotton-polyester blended fabric components.

Description

technical field [0001] The invention relates to a method for separating components of polyester-cotton blended fabrics, in particular to a method for separating components of polyester-cotton blended fabrics in a horizontal centrifugal alcoholysis kettle. Background technique [0002] my country is a large textile country, with a stock of waste textiles of 26 million tons per year, including 18 million tons of chemical fibers (12 million tons of polyester), and 8 million tons of natural fibers. Polyester is divided into pure polyester, polyester cotton, polyester and other blends. , while the proportion of polyester-cotton in polyester is as high as about 70%, that is, the stock is as high as 8.4 million tons / year. However, due to the difficulty in recycling polyester-cotton blended fabrics, most of them have not been effectively recycled, resulting in a huge amount of waste textiles , not only pollute the environment, occupy a large amount of storage space, but also cause a g...

AI Technical Summary

Problems solved by technology

[0005] In order to solve many deficiencies of existing devices in the separation of components of waste polyester-cotton blended fabrics, the present invention provides a method for separating components of waste polyester-cotton blended fabrics using a horizontal rotary alcoholysis kettle. The method utilizes a horizontal inner cylinder to rotate Material mixing effectively solves the problems of solid (cotton fiber) components being entangled, stirred and difficult to discharge.

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