CN202440457U - Recycling system for waste polyester textile - Google Patents

Abstract

The utility model discloses a recycling system for waste polyester textile. The recycling system comprises a polymerization system (1) for recycling and a purification system (2) for collecting by-products and recycling solvents. According to the recycling system, polyesters in the waste polyester textile can be recycled due to continuous processing of the waste polyester textile, large-scale recycling of the waste polyester textile is achieved, requirements for increase of textile fibers are satisfied, dependence on petroleum in industries is reduced, energy is saved and emission is reduced, the environment is protected, sustainable development of the textile industry is promoted, and cyclic economy of the polyester industry is developed.

Description

A kind of system of useless polyester-containing textiles recycling

Technical field

The utility model belongs to the resource recovery field, and more specifically, the utility model relates to a kind of system of useless polyester-containing textiles recycling, and this system is used for serialization to handle useless polyester-containing textiles and make it obtain the industriallization recovery system of recycling.

Background technology

Improving constantly of Along with people's standard of living constantly enlarges the demand of textiles, and natural fiber can not satisfy people's demand already; Regenerated fiber has become the main body in the textile raw material, and terylene is as the maximum kind in China's chemical fibre industry, and its production capacity had reached more than 2,900 ten thousand tons in 2010; Account for more than 2/3 of the world; And the trevira that the oil conversion is produced has accounted for great proportion in regenerated fiber, and the anxiety of oil has influenced the production of trevira again.Therefore, the space-pollution of terylene textiles will be more outstanding, thus reclaim on a large scale the terylene textiles utilize again have very urgent.Reclaim the Regenerated Polyester Fibres of producing with useless polyester product, both solved direct dependence, reduced white pollution again, become a main direction of green weaving future development oil.

The recycling of polyester is crucial field during polymer is recycled.The waste polyester recovery technology is divided into physics recovery technology and chemical recovery technology two big classes.It is with the waste polyester heating and melting that physics reclaims, and the back of purifying is through the screw extruder extrusion moulding, and general process is: classification-fragmentation-cleaning-dehydration-thousand is dry-and granulation (spinning).Chemical recovery method is through chemical reaction waste polyester to be depolymerized to low molecular compound such as terephthalic acid (TPA), DMT. Dimethyl p-benzenedicarboxylate (DMT), ethylene glycol terephthalate (BHET), terephthalic acid two different new esters (DOTP), L--alcohol (EG) etc.; Can be after alcoholysis product is purified again as polyester raw material, or process other products.Chemical recovery method comprises that also chemistry improves, and adopts usually to increase chain modified, cross-linking modified, chlorination modified etc. to change chain length, the structure of polyester, thereby improves its some characteristic.

At present, also nearly all be to be confined to pet bottle to reclaim the field in the useless polyester product field of reclaiming both at home and abroad, for example the U.S. utilizes useless PET bottle through the methyl alcohol alcoholysis, produces DMT. Dimethyl p-benzenedicarboxylate and pinakon, directly carries out polycondensation again and prepares new polyester.These major parts all are that the Application Areas originally according to raw material reclaims degradation and uses.

Recently, carried out relevant report to reclaiming polyester-containing textiles abroad, promptly from " fiber is to the regeneration technology ".This technology is meant carries out chemical treatment with trevira products such as used uniform, tSportswears, restores polyester raw material, produces the process of the trevira product that makes new advances then.At present, Japanese Supreme Being people company in the Guia Hill of Japan Ehime Prefecture cause carry out this business.Dupont is also studied this, and what it reclaimed employing is the methyl alcohol alcoholysis method, is DMT and EG with the polyester depolymerization.But the most serialization of these systems, industrializing implementation degree are low, and the solvent toxicity that adopts simultaneously is strong, the clean-production system that does not provide solvent cycle to utilize.

The utility model content

For solving the problems of the technologies described above; The utility model provides a kind of useless polyester-containing textiles recycling system; This system can recycle the useless pure textiles of washing; The trevira that recovery obtains HV, high added value utilizes again, realizes simultaneously reclaiming solvent recycling, has guaranteed the cleaner production of this industrialization technology.

The utility model is to realize through following technical scheme:

A kind of system of useless polyester-containing textiles recycling, it comprises following system:

(1) paradigmatic system of recycling;

(2) purification system that by product is collected and solvent cycle is utilized;

Be connected through pipeline between the purification system that the paradigmatic system of said recycling and by product are collected and solvent cycle is utilized;

The paradigmatic system of said recycling comprises following system:

(1) the useless pure textile raw material fusion alcoholysis system of washing;

(2) polycondensation system;

(3) Masterbatch injected system;

Said useless pure outlet of washing textile raw material fusion alcoholysis system is connected through pipeline with the inlet of said polycondensation system; The outlet of said polycondensation system is connected through pipeline with said Masterbatch injected system;

The said useless pure textile raw material fusion alcoholysis system of washing comprises like lower unit:

(1) uselessly purely washs the cloth fragmentation, and add alcoholysis terepthaloyl moietie toward screw rod simultaneously it is carried out the alcoholysis unit of partial alcoholysis after feed bin gets into the screw rod melt element;

(2) material that comes out through the screw rod fusion gets into the alcoholysis still, the alcoholysis unit that under certain vacuum tightness, carries out further alcoholysis,

Said polycondensation system comprises like lower unit:

(1) to get into three phases be the precondensation unit to the material after the further alcoholysis of alcoholysis still, before getting into precondensation stage, or/and add catalyzer and deviate from micromolecular in the alcoholysate and deviate from the unit, and carries out partially polymerized polymerized unit simultaneously;

(2) material after precondensation stage is handled gets into final minification and gathers the stage and carry out the final minification that final minification gathers processing and gather the unit.

Said Masterbatch injected system is for to carry out the blended system with the melt after said Masterbatch and the polycondensation.

The beneficial effect of the utility model is:

The system of the disclosed waste spinning fabric of the utility model recycling; With the serialization recycling that realizes extensive waste spinning fabric; Through engineering approaches is strong, and the solvent that adopts in the removal process can recycle, and the method successful implementation of the utility model will require under the prerequisite what textile fibres increased satisfying people; Can reduce demand, reduce industrial goods production discharge capacity oil.Reduced pollution simultaneously, the enabling environment protection promotes the weaving Sustainable development.The state of the art and the characteristics that meet textile industry, the recycling economy of realization PET industry.

Description of drawings

Fig. 1 is the system flowchart of useless polyester-containing textiles recycling;

Fig. 2 is the recycle clean-production system schema of solvent for use.

Embodiment

Below in conjunction with embodiment, the utility model is further specified.

Embodiment 1

As shown in Figure 1, take by weighing the useless pure textiles 100kg/h that washs, get into the screw rod fusion; Adding terepthaloyl moietie 10kg/h toward screw rod simultaneously, is 190 ℃ of following alcoholysis 30min in normal pressure, temperature, and the material that comes out through the screw rod fusion gets into the alcoholysis still; Under little negative pressure, carry out further alcoholysis; Temperature is 200 ℃ of following alcoholysis 10min, has guaranteed the abundant alcoholysis of useless polyester raw material, and the terepthaloyl moietie that this stage extracts out gets into the terepthaloyl moietie treatment system.Material after the further alcoholysis of alcoholysis still gets into precondensation stage, before getting into precondensation stage, adds catalyzer 0.1g, and the catalyst glycol concentration that is made into is 20%; In vacuum tightness is 2000Pa, and temperature of reaction is 275 ℃, and the reaction times is 60min; Deviate from the small molecules in the alcoholysate, simultaneously partially polymerized, the material after precondensation is handled gets into final minification and gathers; Vacuum tightness 300Pa, temperature of reaction is 285 ℃, is 90min between reaction is seasonable; Deviate from small molecules such as terepthaloyl moietie, obtain the limiting viscosity of regenerated polyester 0.67dl/g.

Embodiment 2

Come the terepthaloyl moietie 80kg/h of the alcoholysis still extraction of autonomous technology retrieving arrangement, get into a terepthaloyl moietie lightness-removing column and handle, remove the light constituent in the alcoholysis terepthaloyl moietie; Handle to light constituent and with this part light constituent collection carrying out export trade in overhead collection; At the bottom of tower, obtained the terepthaloyl moietie 78kg/h of light constituent, got into a terepthaloyl moietie weight-removing column and handle, the export trade processing has been collected in the heavy constituent at the bottom of tower; Obtain highly purified terepthaloyl moietie 74kg/h at cat head, purity is>85%.

Should be appreciated that above narration only is an example and illustrative for the utility model of setting forth like claim, is not that it is limited.According to the content of the utility model that this paper disclosed, other embodiment of the utility model is conspicuous for a person skilled in the art.Should be noted that this specification sheets and embodiment only should be regarded as is example, and the actual range of the utility model should be confirmed by claim.

Claims (1)

1. the system of a useless polyester-containing textiles recycling, it is characterized in that: it comprises following system:

(1) paradigmatic system of recycling;

(2) purification system that by product is collected and solvent cycle is utilized;

Be connected through pipeline between the purification system that the paradigmatic system of said recycling and by product are collected and solvent cycle is utilized;

The paradigmatic system of said recycling comprises following system:

(1) the useless pure textile raw material fusion alcoholysis system of washing;

(2) polycondensation system;

(3) Masterbatch injected system;

Said useless pure outlet of washing textile raw material fusion alcoholysis system is connected through pipeline with the inlet of said polycondensation system; The outlet of said polycondensation system is connected through pipeline with said Masterbatch injected system;

The said useless pure textile raw material fusion alcoholysis system of washing comprises like lower unit:

(1) uselessly purely washs the cloth fragmentation, and add alcoholysis terepthaloyl moietie toward screw rod simultaneously it is carried out the alcoholysis unit of partial alcoholysis after feed bin gets into the screw rod melt element;

(2) material that comes out through the screw rod fusion gets into the alcoholysis still, the alcoholysis unit that under certain vacuum tightness, carries out further alcoholysis,

Said polycondensation system comprises like lower unit:

(1) to get into three phases be the precondensation unit to the material after the further alcoholysis of alcoholysis still, before getting into precondensation stage, or/and add catalyzer and deviate from micromolecular in the alcoholysate and deviate from the unit, and carries out partially polymerized polymerized unit simultaneously;

(2) material after precondensation stage is handled gets into final minification and gathers the stage and carry out the final minification that final minification gathers processing and gather the unit;

Said Masterbatch injected system is for to carry out the blended system with the melt after said Masterbatch and the polycondensation.

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