WO2017067014A1 - Method for recovering and reutilizing waste cotton textile - Google Patents

Method for recovering and reutilizing waste cotton textile Download PDF

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Publication number
WO2017067014A1
WO2017067014A1 PCT/CN2015/092928 CN2015092928W WO2017067014A1 WO 2017067014 A1 WO2017067014 A1 WO 2017067014A1 CN 2015092928 W CN2015092928 W CN 2015092928W WO 2017067014 A1 WO2017067014 A1 WO 2017067014A1
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ethylene glycol
glycol
waste cotton
recycling
cotton textile
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PCT/CN2015/092928
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French (fr)
Chinese (zh)
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包峰
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南通金康弘纺织品有限公司
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Definitions

  • the invention relates to the field of prevention, in particular to a method for recycling secondary utilization of waste cotton textiles.
  • polyester fibers are the largest variety in China's chemical fiber industry. Its production capacity in 2010 It has reached more than 29 million tons, accounting for more than 2/3 of the world.
  • the polyester fiber produced by petroleum conversion accounts for a large proportion of man-made fiber, and the tension of oil affects the production of polyester fiber. Therefore, the space pollution of polyester textiles will become more prominent, so the recycling of large-scale recycled polyester textiles is very urgent.
  • the recycled polyester fiber produced by recycling waste polyester products not only solves the direct dependence on oil, but also reduces white pollution, and becomes a main direction for the future development of green textile.
  • the mechanical method is to recycle the waste textile directly into a recyclable fiber that can be spun out without separation.
  • the chemical recycling of cotton textiles is mainly used as a cellulose raw material for preparing other cellulose products, such as viscose, paper, etc., or incinerating waste textiles into heat for recycling and recycling of thermal power generation.
  • the mechanical method has low cost and wide application, but the process flow is long, the energy consumption is high, and high dusty air and dust are easily generated during processing, and the added value of the product is low.
  • the thermal energy method is simple, low in cost and thorough in recovery, but the cellulose has a low calorific value and may cause environmental pollution.
  • the main component of cotton textiles is cellulose, which is composed of three elements of carbon and hydrogen.
  • the carbon content is as high as 44.44%, which can be used to prepare carbon materials.
  • the conversion of waste cotton textiles into carbon materials not only recycles waste materials, but also enhances their use value, while providing a carbon source for the preparation of carbon materials.
  • the present invention provides a porous functional carbon fiber cluster having a highly reactive functional group and a pore on the surface which can maintain the fiber shape advantage and has a special function by simply treating the waste cotton textile.
  • a method for recycling secondary utilization of waste cotton textiles comprising the following steps:
  • waste cotton textile is impregnated with KH-550 solution, ammonium chloride solution and zinc chloride solution in turn;
  • the pre-oxidation in the step (2) is carried out by a pre-oxidation treatment method of pre-oxidation at 160 ° C to 200 ° C and further heating to 260 to 320 ° C for pre-oxidation.
  • the insulating air carbonization treatment is a stepwise carbonization treatment method in which carbonization treatment is first performed at 400 to 600 ° C and then heated to 550 to 900 ° C for carbonization treatment.
  • the purification system in step (4) comprises the following working steps:
  • the glycol extracted from the alcohol decanter enters an ethylene glycol de-lighting tower, removes the light components in the alcoholysis glycol, collects the light components at the top of the column, and obtains the light-free group at the bottom of the column.
  • the high-purity ethylene glycol from the ethylene glycol de-weighting tower is divided into four parts: the first part of the alcohol dehydration kettle, the alcoholysis glycol is provided for the alcoholysis melting process, and the second part is evaporated by the glycol of the vacuum system. Go to the jet pump of the vacuum system, the third part enters the hot well of the glycol jet pump, and the last part returns to the fresh glycol storage. tank;
  • the amount of ethylene glycol consumed by the entire device is continuously replenished with the ethylene glycol storage tank, and partially delivered to the recovery device to form a circulating closed system.
  • the carbon fiber cluster prepared by the invention not only has discontinuous fibers, has a large number of pores, but also has irregular pores on the surface of the fiber, and thus can be used as a carrier of a functional material, such as an antibacterial ion adsorbing silver or the like to obtain an antibacterial additive material. It can be used to prepare various antibacterial products; it can also be used as an adsorption material for textile dye wastewater to realize efficient use of waste resources; it can also be widely used in other fields such as water treatment and gas filtration.
  • a functional material such as an antibacterial ion adsorbing silver or the like
  • the invention realizes continuous recycling and recycling of large-scale waste textiles, and the degree of engineering is extremely high, and the solvent used in the recycling process can be recycled, and the successful implementation of the method of the invention will meet the increasing requirements of textile fibers.
  • the demand for oil can be reduced and the production displacement of industrial products can be reduced.
  • it reduces pollution, promotes environmental protection and promotes the sustainable development of textiles.
  • the circular economy of the polyester industry is realized.
  • a method for recycling secondary utilization of waste cotton textiles comprising the following steps:
  • waste cotton textile is impregnated with KH-550 solution, ammonium chloride solution and zinc chloride solution in turn;
  • the carbon fiber cluster prepared by the invention not only has discontinuous fibers, has a large number of pores, and has irregular pores on the surface of the fiber, so it can be used as a carrier of functional materials, such as adsorbing antibacterial ions such as silver to prepare an antibacterial additive material for preparation.
  • Various antibacterial products can also be used as adsorption materials for textile dye wastewater to achieve efficient use of waste resources; it can also be widely used in other fields such as water treatment and gas filtration.
  • the pre-oxidation in the step (2) is a step-by-step pre-oxidation treatment in which the pre-oxidation is carried out at 160 ° C to 200 ° C and then pre-oxidized to 260 to 320 ° C.
  • the insulating carbonization treatment adopts a step-by-step carbonization treatment method in which carbonization treatment is first performed at 400 to 600 ° C, and then the temperature is raised to 550 to 900 ° C for carbonization treatment.
  • the purification system in step (4) includes the following work steps:
  • the glycol extracted from the alcohol decanter enters an ethylene glycol de-lighting tower, removes the light components in the alcoholysis glycol, collects the light components at the top of the column, and obtains the light-free group at the bottom of the column.
  • the high-purity ethylene glycol from the ethylene glycol de-weighting tower is divided into four parts: the first part of the alcohol dehydration kettle, the alcoholysis glycol is provided for the alcoholysis melting process, and the second part is evaporated by the glycol of the vacuum system. Go to the jet pump of the vacuum system, the third part enters the hot well of the glycol spray pump, and the last part returns to the fresh ethylene glycol storage tank;
  • the amount of ethylene glycol consumed by the entire device is continuously replenished with the ethylene glycol storage tank, and partially delivered to the recovery device to form a circulating closed system.
  • the invention realizes continuous recycling and recycling of large-scale waste textiles, and the degree of engineering is extremely high, and the solvent used in the recycling process can be recycled, and the successful implementation of the method of the invention will meet the requirements of increasing textile fibers. It can reduce the demand for oil and reduce the production displacement of industrial products. At the same time, it reduces pollution, promotes environmental protection and promotes the sustainable development of textiles. In line with the technical status and characteristics of the textile industry, the circular economy of the polyester industry is realized.

Abstract

Provided is a method for recovering and reutilizing a waste cotton textile, comprising the following steps: (1) subjecting the waste cotton textile to immersion treatments in a KH-550 solution, an ammonium chloride solution, and a zinc chloride solution in sequence; (2) subjecting the mixture obtained in step (1) to a pre-oxidation treatment; (3) increasing the temperature of the mixture to 400ºC-900ºC to perform a carbonization treatment with air isolation, and converting same to a porous functional carbon fiber tuft; and (4) collecting the by-product in step (2) and recycling a solvent in a purification system. The carbon fiber tuft prepared by utilizing the method is discontinuous among the fibers and has a large number of holes, and has irregular holes on the surface of the fiber, therefore, the carbon fiber tuft can be used as a carrier for a functional material, such as can be prepared into antibacterial adding materials by adsorbing antibacterial ions such as silver ions, and used for preparing various antibacterial preparations; can also be used as an adsorbing material for a textile dye wastewater, and realizes the highly efficient utilization of waste resources; and can also be widely used in fields such as other water treatments and gas filtration.

Description

一种废棉纺织品回收二次利用的方法Method for recycling secondary utilization of waste cotton textile 技术领域：Technical field:
本发明涉及防止领域，尤其涉及一种废棉纺织品回收二次利用的方法。The invention relates to the field of prevention, in particular to a method for recycling secondary utilization of waste cotton textiles.
背景技术：Background technique:
随着人们生活水平的不断提高，对纺织品的需求不断扩大，天然纤维早已不能满足人们的需求，人造纤维成了纺织原料中的主体，而且涤纶作为我国化纤行业中的最大品种，2010年其产能已经达到2900多万吨，占世界的2/3以上，而石油转换生产的聚酯纤维在人造纤维中占了重大比重，石油的紧张，又影响了聚酯纤维的生产。因此，涤纶纺织品的空间污染将会更加突出，因而大规模的回收涤纶纺织品再利用具有非常紧迫性。以废聚酯产品回收生产的再生聚酯纤维，既解决了对石油的直接依赖，又减少了白色污染，成为绿色纺织未来发展的一个主要方向。With the continuous improvement of people's living standards, the demand for textiles is expanding, natural fibers can no longer meet people's needs, man-made fibers have become the main body of textile raw materials, and polyester is the largest variety in China's chemical fiber industry. Its production capacity in 2010 It has reached more than 29 million tons, accounting for more than 2/3 of the world. The polyester fiber produced by petroleum conversion accounts for a large proportion of man-made fiber, and the tension of oil affects the production of polyester fiber. Therefore, the space pollution of polyester textiles will become more prominent, so the recycling of large-scale recycled polyester textiles is very urgent. The recycled polyester fiber produced by recycling waste polyester products not only solves the direct dependence on oil, but also reduces white pollution, and becomes a main direction for the future development of green textile.
目前的废旧棉纺织品处理方法主要包括机械法和化学法。机械法是将废旧纺织品不经分离直接加工成可纺出纱线的再循环纤维。棉纺织品的化学回收利用主要是将其作为纤维素原料，用于制备其他纤维素制品，如黏胶、纸等，或者将废旧纺织品焚烧转化为热量，用于火力发电回收再利用。机械法成本较低，应用广泛，但工艺流程长、能耗高、加工中极易产生高含尘空气和粉尘，且产品附加值低。热能法简单，成本低，回收彻底，但纤维素热值低，并且可能会造成环境污染。Current methods for treating waste cotton textiles mainly include mechanical and chemical methods. The mechanical method is to recycle the waste textile directly into a recyclable fiber that can be spun out without separation. The chemical recycling of cotton textiles is mainly used as a cellulose raw material for preparing other cellulose products, such as viscose, paper, etc., or incinerating waste textiles into heat for recycling and recycling of thermal power generation. The mechanical method has low cost and wide application, but the process flow is long, the energy consumption is high, and high dusty air and dust are easily generated during processing, and the added value of the product is low. The thermal energy method is simple, low in cost and thorough in recovery, but the cellulose has a low calorific value and may cause environmental pollution.
棉纺织品的主要成分是纤维素，由碳氢氧三种元素组成，含碳量高达44.44％以上，可用于制备碳材料。将废旧棉纺织品转变为碳材料，不但可以回收利用废旧物质，提升其利用价值，同时为碳材料的制备提供了碳源。The main component of cotton textiles is cellulose, which is composed of three elements of carbon and hydrogen. The carbon content is as high as 44.44%, which can be used to prepare carbon materials. The conversion of waste cotton textiles into carbon materials not only recycles waste materials, but also enhances their use value, while providing a carbon source for the preparation of carbon materials.
发明内容： Summary of the invention:
为了解决上述问题，本发明提供了一种通过对废旧棉纺织品进行简单处理，使其转变成为一种既能保持纤维形态优势，又具有特殊功能的表面具有高活性官能团和孔洞的多孔功能碳纤维簇，以实现废旧棉纺织品的高价值回收利用的技术方案：In order to solve the above problems, the present invention provides a porous functional carbon fiber cluster having a highly reactive functional group and a pore on the surface which can maintain the fiber shape advantage and has a special function by simply treating the waste cotton textile. To achieve high-value recycling of waste cotton textiles:
一种废棉纺织品回收二次利用的方法，包括以下步骤：A method for recycling secondary utilization of waste cotton textiles, comprising the following steps:
(1)是将废旧棉纺织品依次经KH-550溶液、氯化铵溶液、氯化锌溶液浸渍处理；(1) The waste cotton textile is impregnated with KH-550 solution, ammonium chloride solution and zinc chloride solution in turn;
(2)将步骤(1)中所得到的混合物进行预氧化处理；(2) pre-oxidizing the mixture obtained in the step (1);
(3)将混合物隔绝空气升温至400～900℃进行碳化处理，转变为多孔功能碳纤维簇；(3) The mixture is insulated from air to 400-900 ° C for carbonization treatment, and converted into porous functional carbon fiber clusters;
(4)将步骤(2)中副产物收集并将溶剂循环利用的净化***。(4) A purification system that collects by-products in the step (2) and recycles the solvent.
作为优选，步骤(2)中的预氧化采用先在160℃～200℃预氧化，再升温至260～320℃预氧化的分步预氧化处理方式。Preferably, the pre-oxidation in the step (2) is carried out by a pre-oxidation treatment method of pre-oxidation at 160 ° C to 200 ° C and further heating to 260 to 320 ° C for pre-oxidation.
作为优选，步骤(3)中隔绝空气碳化处理采用先在400～600℃碳化处理，再升温至550～900℃碳化处理的分步碳化处理方式。Preferably, in step (3), the insulating air carbonization treatment is a stepwise carbonization treatment method in which carbonization treatment is first performed at 400 to 600 ° C and then heated to 550 to 900 ° C for carbonization treatment.
作为优选，步骤(4)中的净化***包括以下工作步骤：Preferably, the purification system in step (4) comprises the following working steps:
1)将醇解釜抽出的乙二醇进入一个乙二醇脱轻塔，去除醇解乙二醇中的轻组分，在塔顶收集到轻组分，在塔底得到了不含轻组分的乙二醇；1) The glycol extracted from the alcohol decanter enters an ethylene glycol de-lighting tower, removes the light components in the alcoholysis glycol, collects the light components at the top of the column, and obtains the light-free group at the bottom of the column. Ethylene glycol
2)经乙二醇脱轻塔处理后的乙二醇进入一个乙二醇脱重塔进行处理，将在塔底的重组分进行收集处理，在塔顶得到纯度大于90％的乙二醇；2) The ethylene glycol treated by the ethylene glycol de-lighting tower enters an ethylene glycol de-weighting tower for treatment, and the heavy components at the bottom of the column are collected and treated, and ethylene glycol having a purity greater than 90% is obtained at the top of the column;
3)从乙二醇脱重塔出来的高纯度乙二醇分成四部分：第一部分去醇解釜，为醇解熔融工序提供醇解乙二醇，第二部分经真空***的乙二醇蒸发器去真空***的喷射泵，第三部分进入乙二醇喷射泵热井，最后一部分回到新鲜的乙二醇储 罐；3) The high-purity ethylene glycol from the ethylene glycol de-weighting tower is divided into four parts: the first part of the alcohol dehydration kettle, the alcoholysis glycol is provided for the alcoholysis melting process, and the second part is evaporated by the glycol of the vacuum system. Go to the jet pump of the vacuum system, the third part enters the hot well of the glycol jet pump, and the last part returns to the fresh glycol storage. tank;
4)乙二醇喷射泵热井的乙二醇经泵输入终缩聚釜的乙二醇热井，用于终缩聚釜的乙二醇喷淋；4) The ethylene glycol of the hot water well of the ethylene glycol jet pump is pumped into the glycol hot well of the final polycondensation kettle for the ethylene glycol spray of the final polycondensation kettle;
5)终缩聚釜的乙二醇热井溢流进入预缩聚德乙二醇热井，用于预缩聚釜的乙二醇喷淋，该部分产生的乙二醇中其它组分含量较高，再回到乙二醇脱轻塔进行循环处理；5) The ethylene glycol hot well overflow of the final polycondensation kettle enters the pre-polycondensation ethylene glycol hot well for the ethylene glycol spray of the pre-condensation kettle, and the other components of the ethylene glycol produced in the part are high. Return to the ethylene glycol de-light tower for recycling;
6)用乙二醇储罐不断补充整个装置消耗的乙二醇的量，同时部分输送至回收装置使用，形成一个循环密闭的***。6) The amount of ethylene glycol consumed by the entire device is continuously replenished with the ethylene glycol storage tank, and partially delivered to the recovery device to form a circulating closed system.
本发明的有益效果在于：The beneficial effects of the invention are:
(1)本发明制备的碳纤维簇不仅纤维间不连续，具有大量的孔洞，纤维表面也具有不规则的孔洞，因此可以作为功能材料的载体，如吸附银等抗菌离子可制得抗菌添加材料，用于制备各种抗菌制品；也可作为纺织染料废水的吸附材料，实现废旧资源的高效利用；还可以广泛应用于其他水处理和气体过滤等领域。(1) The carbon fiber cluster prepared by the invention not only has discontinuous fibers, has a large number of pores, but also has irregular pores on the surface of the fiber, and thus can be used as a carrier of a functional material, such as an antibacterial ion adsorbing silver or the like to obtain an antibacterial additive material. It can be used to prepare various antibacterial products; it can also be used as an adsorption material for textile dye wastewater to realize efficient use of waste resources; it can also be widely used in other fields such as water treatment and gas filtration.
(2)本发明实现大规模废纺织品的连续化回收再利用，工程化程度极高，而且回收过程中采用的溶剂可以循环使用，本发明的方法成功实施将在满足人们对纺织纤维增加的要求前提下，可减少对石油的需求，减少工业品生产排量。同时减少了污染，有利环境保护，促进纺织可持续发展。符合纺织业的技术现状和特点，实现聚酯行业的循环经济。(2) The invention realizes continuous recycling and recycling of large-scale waste textiles, and the degree of engineering is extremely high, and the solvent used in the recycling process can be recycled, and the successful implementation of the method of the invention will meet the increasing requirements of textile fibers. Under the premise, the demand for oil can be reduced and the production displacement of industrial products can be reduced. At the same time, it reduces pollution, promotes environmental protection and promotes the sustainable development of textiles. In line with the technical status and characteristics of the textile industry, the circular economy of the polyester industry is realized.
具体实施方式：detailed description:
为使本发明的发明目的、技术方案和优点更加清楚，下面将对本发明的实施方式作进一步地详细描述。The embodiments of the present invention will be further described in detail below in order to clarify the objects, aspects, and advantages of the invention.
一种废棉纺织品回收二次利用的方法，包括以下步骤：A method for recycling secondary utilization of waste cotton textiles, comprising the following steps:
(1)将废旧棉纺织品依次经KH-550溶液、氯化铵溶液、氯化锌溶液浸渍处理； (1) The waste cotton textile is impregnated with KH-550 solution, ammonium chloride solution and zinc chloride solution in turn;
(2)将步骤(1)中所得到的混合物进行预氧化处理；(2) pre-oxidizing the mixture obtained in the step (1);
(3)将混合物隔绝空气升温至400～900℃进行碳化处理，转变为多孔功能碳纤维簇；(3) The mixture is insulated from air to 400-900 ° C for carbonization treatment, and converted into porous functional carbon fiber clusters;
(4)将步骤(2)中副产物收集并将溶剂循环利用的净化***。(4) A purification system that collects by-products in the step (2) and recycles the solvent.
本发明制备的碳纤维簇不仅纤维间不连续，具有大量的孔洞，纤维表面也具有不规则的孔洞，因此可以作为功能材料的载体，如吸附银等抗菌离子可制得抗菌添加材料，用于制备各种抗菌制品；也可作为纺织染料废水的吸附材料，实现废旧资源的高效利用；还可以广泛应用于其他水处理和气体过滤等领域。The carbon fiber cluster prepared by the invention not only has discontinuous fibers, has a large number of pores, and has irregular pores on the surface of the fiber, so it can be used as a carrier of functional materials, such as adsorbing antibacterial ions such as silver to prepare an antibacterial additive material for preparation. Various antibacterial products; can also be used as adsorption materials for textile dye wastewater to achieve efficient use of waste resources; it can also be widely used in other fields such as water treatment and gas filtration.
其中的步骤(2)中的预氧化采用先在160℃～200℃预氧化，再升温至260～320℃预氧化的分步预氧化处理方式。步骤(3)中隔绝空气碳化处理采用先在400～600℃碳化处理，再升温至550～900℃碳化处理的分步碳化处理方式。步骤(4)中的净化***包括以下工作步骤：The pre-oxidation in the step (2) is a step-by-step pre-oxidation treatment in which the pre-oxidation is carried out at 160 ° C to 200 ° C and then pre-oxidized to 260 to 320 ° C. In step (3), the insulating carbonization treatment adopts a step-by-step carbonization treatment method in which carbonization treatment is first performed at 400 to 600 ° C, and then the temperature is raised to 550 to 900 ° C for carbonization treatment. The purification system in step (4) includes the following work steps:
1)将醇解釜抽出的乙二醇进入一个乙二醇脱轻塔，去除醇解乙二醇中的轻组分，在塔顶收集到轻组分，在塔底得到了不含轻组分的乙二醇；1) The glycol extracted from the alcohol decanter enters an ethylene glycol de-lighting tower, removes the light components in the alcoholysis glycol, collects the light components at the top of the column, and obtains the light-free group at the bottom of the column. Ethylene glycol
2)经乙二醇脱轻塔处理后的乙二醇进入一个乙二醇脱重塔进行处理，将在塔底的重组分进行收集处理，在塔顶得到纯度大于90％的乙二醇；2) The ethylene glycol treated by the ethylene glycol de-lighting tower enters an ethylene glycol de-weighting tower for treatment, and the heavy components at the bottom of the column are collected and treated, and ethylene glycol having a purity greater than 90% is obtained at the top of the column;
3)从乙二醇脱重塔出来的高纯度乙二醇分成四部分：第一部分去醇解釜，为醇解熔融工序提供醇解乙二醇，第二部分经真空***的乙二醇蒸发器去真空***的喷射泵，第三部分进入乙二醇喷射泵热井，最后一部分回到新鲜的乙二醇储罐；3) The high-purity ethylene glycol from the ethylene glycol de-weighting tower is divided into four parts: the first part of the alcohol dehydration kettle, the alcoholysis glycol is provided for the alcoholysis melting process, and the second part is evaporated by the glycol of the vacuum system. Go to the jet pump of the vacuum system, the third part enters the hot well of the glycol spray pump, and the last part returns to the fresh ethylene glycol storage tank;
4)乙二醇喷射泵热井的乙二醇经泵输入终缩聚釜的乙二醇热井，用于终缩聚釜的乙二醇喷淋；4) The ethylene glycol of the hot water well of the ethylene glycol jet pump is pumped into the glycol hot well of the final polycondensation kettle for the ethylene glycol spray of the final polycondensation kettle;
5)终缩聚釜的乙二醇热井溢流进入预缩聚德乙二醇热井，用于预缩聚釜的 乙二醇喷淋，该部分产生的乙二醇中其它组分含量较高，再回到乙二醇脱轻塔进行循环处理；5) The ethylene glycol hot well overflow of the final polycondensation kettle enters the pre-condensed polyethylene glycol hot well for pre-condensation kettle Ethylene glycol spray, the higher content of other components in the ethylene glycol produced in this part, and then returned to the ethylene glycol de-light tower for recycling;
6)用乙二醇储罐不断补充整个装置消耗的乙二醇的量，同时部分输送至回收装置使用，形成一个循环密闭的***。6) The amount of ethylene glycol consumed by the entire device is continuously replenished with the ethylene glycol storage tank, and partially delivered to the recovery device to form a circulating closed system.
本发明实现大规模废纺织品的连续化回收再利用，工程化程度极高，而且回收过程中采用的溶剂可以循环使用，本发明的方法成功实施将在满足人们对纺织纤维增加的要求前提下，可减少对石油的需求，减少工业品生产排量。同时减少了污染，有利环境保护，促进纺织可持续发展。符合纺织业的技术现状和特点，实现聚酯行业的循环经济。The invention realizes continuous recycling and recycling of large-scale waste textiles, and the degree of engineering is extremely high, and the solvent used in the recycling process can be recycled, and the successful implementation of the method of the invention will meet the requirements of increasing textile fibers. It can reduce the demand for oil and reduce the production displacement of industrial products. At the same time, it reduces pollution, promotes environmental protection and promotes the sustainable development of textiles. In line with the technical status and characteristics of the textile industry, the circular economy of the polyester industry is realized.
上述实施例只是本发明的较佳实施例，并不是对本发明技术方案的限制，只要是不经过创造性劳动即可在上述实施例的基础上实现的技术方案，均应视为落入本发明专利的权利保护范围内。 The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention. Any technical solutions that can be implemented on the basis of the above embodiments without creative work should be considered as falling into the present invention. The scope of protection of rights.

Claims (4)

  1. 一种废棉纺织品回收二次利用的方法，其特征在于：包括以下步骤：A method for recycling secondary utilization of waste cotton textiles, comprising: the following steps:
    (1)将废旧棉纺织品依次经KH-550溶液、氯化铵溶液、氯化锌溶液浸渍处理；(1) The waste cotton textile is impregnated with KH-550 solution, ammonium chloride solution and zinc chloride solution in turn;
    (2)将步骤(1)中所得到的混合物进行预氧化处理；(2) pre-oxidizing the mixture obtained in the step (1);
    (3)将混合物隔绝空气升温至400～900℃进行碳化处理，转变为多孔功能碳纤维簇；(3) The mixture is insulated from air to 400-900 ° C for carbonization treatment, and converted into porous functional carbon fiber clusters;
    (4)将步骤(2)中副产物收集并将溶剂循环利用的净化***。(4) A purification system that collects by-products in the step (2) and recycles the solvent.
  2. 根据权利要求1所述的一种废棉纺织品回收二次利用的方法，其特征在于：所述步骤(2)中的预氧化采用先在160℃～200℃预氧化，再升温至260～320℃预氧化的分步预氧化处理方式。The method for recycling secondary waste cotton textile according to claim 1, wherein the pre-oxidation in the step (2) is pre-oxidized at 160 ° C to 200 ° C, and then heated to 260-320. °C pre-oxidation step-by-step pre-oxidation treatment.
  3. 根据权利要求1所述的一种废棉纺织品回收二次利用的方法，其特征在于：所述步骤(3)中隔绝空气碳化处理采用先在400～600℃碳化处理，再升温至550～900℃碳化处理的分步碳化处理方式。The method for recycling secondary waste cotton textile according to claim 1, wherein the carbonization treatment of the isolated air in the step (3) is first performed at 400 to 600 ° C for carbonization, and then heated to 550 to 900. Step-by-step carbonization of carbonization at °C.
  4. 根据权利要求1所述的一种废棉纺织品回收二次利用的方法，其特征在于：所述步骤(4)中的净化***包括以下工作步骤：The method for recycling secondary waste cotton textile according to claim 1, wherein the purification system in the step (4) comprises the following working steps:
    1)将醇解釜抽出的乙二醇进入一个乙二醇脱轻塔，去除醇解乙二醇中的轻组分，在塔顶收集到轻组分，在塔底得到了不含轻组分的乙二醇；1) The glycol extracted from the alcohol decanter enters an ethylene glycol de-lighting tower, removes the light components in the alcoholysis glycol, collects the light components at the top of the column, and obtains the light-free group at the bottom of the column. Ethylene glycol
    2)经乙二醇脱轻塔处理后的乙二醇进入一个乙二醇脱重塔进行处理，将在塔底的重组分进行收集处理，在塔顶得到纯度大于90％的乙二醇；2) The ethylene glycol treated by the ethylene glycol de-lighting tower enters an ethylene glycol de-weighting tower for treatment, and the heavy components at the bottom of the column are collected and treated, and ethylene glycol having a purity greater than 90% is obtained at the top of the column;
    3)从乙二醇脱重塔出来的高纯度乙二醇分成四部分：第一部分去醇解釜，为醇解熔融工序提供醇解乙二醇，第二部分经真空***的乙二醇蒸发器去真空***的喷射泵，第三部分进入乙二醇喷射泵热井，最后一部分回到新鲜的乙二醇储罐；3) The high-purity ethylene glycol from the ethylene glycol de-weighting tower is divided into four parts: the first part of the alcohol dehydration kettle, the alcoholysis glycol is provided for the alcoholysis melting process, and the second part is evaporated by the glycol of the vacuum system. Go to the jet pump of the vacuum system, the third part enters the hot well of the glycol spray pump, and the last part returns to the fresh ethylene glycol storage tank;
    4)乙二醇喷射泵热井的乙二醇经泵输入终缩聚釜的乙二醇热井，用于终缩聚釜 的乙二醇喷淋；4) Ethylene glycol jet pump hot water glycol is pumped into the final polycondensation kettle glycol hot well for final polycondensation kettle Ethylene glycol spray;
    5)终缩聚釜的乙二醇热井溢流进入预缩聚德乙二醇热井，用于预缩聚釜的乙二醇喷淋，该部分产生的乙二醇中其它组分含量较高，再回到乙二醇脱轻塔进行循环处理；5) The ethylene glycol hot well overflow of the final polycondensation kettle enters the pre-polycondensation ethylene glycol hot well for the ethylene glycol spray of the pre-condensation kettle, and the other components of the ethylene glycol produced in the part are high. Return to the ethylene glycol de-light tower for recycling;
    6)用乙二醇储罐不断补充整个装置消耗的乙二醇的量，同时部分输送至回收装置使用，形成一个循环密闭的***。 6) The amount of ethylene glycol consumed by the entire device is continuously replenished with the ethylene glycol storage tank, and partially delivered to the recovery device to form a circulating closed system.
PCT/CN2015/092928 2015-10-23 2015-10-27 Method for recovering and reutilizing waste cotton textile WO2017067014A1 (en)

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