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Method for Separating Components of Waste Polyester-Cotton Blended Fabrics
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A polyester-cotton blending and separation method technology, which is applied in separation methods, filtration separation, chemical instruments and methods, etc., can solve problems such as difficulties, winding, stirring and discharging, and achieves reduction of damage, efficient polyester-cotton separation, and improvement of alcoholysis products. rate effect
Active Publication Date: 2020-03-20
温州天成纺织有限公司
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[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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[0027] Such as figure 1 As shown, in a preferred embodiment of the present invention, the device includes a horizontal rotatable alcoholysis kettle 1, a reflux condensation device 2, a collecting tank 3, a vacuum device and a motor 5.
[0028] The horizontal rotatable alcoholysis kettle 1 is composed of an outer cylinder 110 and an inner cylinder 120.
[0029] The outer cylinder 110 is cylindrical, and is fixed on the bracket 4 in the axial direction and horizontally. The outer cylinder is provided with a cylinder cover 108, a reflux condenser interface 111, a discharge port 116, a feed port 117, a pressure gauge port 114, a temperature sensor port 105 and a liquid discharge port 113. The cylinder cover 108 is arranged on a bottom surface of the cylindrical shape, the cylinder cover 108 and the outer cylinder 110 are connected by quick-release bolts 101, and a window 106 is provided on t...
Embodiment 2
[0033] Example 2 Alcoholysis separation of waste polyester-cotton textiles
[0034] 1. Raw materials:
[0035] Alcoholic agent: ethylene glycol;
[0036] Catalyst: sodium carbonate;
[0037] Waste polyester-cotton blended fabric: polyester 87 / cotton 13 (only the waste polyester-cotton jacket with the adhesive interlining and metal attachment removed);
[0038] The weight ratio of alcoholysis agent to waste polyester-cotton blended fabric is 6:1;
[0039] The amount of catalyst added is 0.4‰ of the weight of waste polyester-cotton blended fabric.
[0040] 2. Use the device described in Example 1 for alcoholysis and separation, and the specific operation steps are as follows:
[0041] I. Put the waste polyester-cotton blended fabric into the inner cylinder, the alcoholysis agent and catalyst are added to the outer cylinder from the feed port, and the cylinder cover is closed;
[0042] II. Turn on the motor and heating device to make the inner cylinder rotate in the forward and reverse directi...
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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] China is a major textile country, with 26 million tons of waste textiles stocked annually, 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. , And the proportion of polyester-cotton in polyester is as high as about 70%, that is, the inventory is as high as 8.4 million tons / year. However, due to the difficulty of recycling polyester-cotton blended fabrics, most of them are not effectively recycled, resulting in a huge amount of waste textiles , Not only pollutes the environment, occupies a lot of storage space, but also causes a great waste of resourc...
Claims
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