Textile recycling economy development

As a new type of economic growth, circular economy has received more and more attention. To develop a circular economy, build a recycling-oriented society, and organically combine economic development with environmental protection is to alleviate the contradiction between economic growth, resource shortage and environmental protection, and promote sustainable economic and social development. The state has included the circular economy in the government work report and the next task.

The textile industry occupies an important position in the development of China's national economy. As a key industrial industry, textiles and clothing products are the main consumer goods of people's lives. The textile industry must also adopt a new industrialized road with high technology content, good economic returns, low resource consumption, less environmental pollution, and full utilization of human resources. For the textile industry, it is the need to achieve sustainable development. It is an urgent requirement to actively respond to the competition in the global market. It is also an effective way to adjust the industrial structure and an important measure to improve the core competitiveness of enterprises.

The main task of developing circular economy

The implementation of circular economy in the textile industry must be promoted in many aspects, among which the development of environmentally friendly textiles, the treatment and recycling of wastewater are important tasks.

1. Develop environmentally friendly textiles

Environmentally friendly textiles are the first consideration in the textile recycling economy. Some people in the industry have classified environmentally friendly textiles into the following elements: clean and environmentally friendly production processes (including raw materials to processing); environmental protection during use (divided into textiles that are harmless to the human body and improve the environment); Environmentally friendly treatment (treatment methods include recyclability, decomposable treatment, incineration to destroy non-polluting air and causing harmful substances to volatilize).

Cotton, wool (especially cashmere), silk, hemp, etc. are China's dominant natural resources, and also the main textile raw materials. To develop high value-added, high-grade products, it is necessary to follow environmental protection requirements from the cultivation of raw materials, from chemical fertilizers and pesticides. In terms of environmental protection, we will develop organic products. Natural fiber with natural color, such as natural colored cotton, can be spit green silk "Sericulture", etc., has its own color, reducing pollution in printing and dyeing. In recent years, due to the application of genetic engineering, many new progresses have been made in the aspects of spinning, weaving and bleaching and finishing of colored cotton. It has a leading position in the world and should be explored, research and development, and expand its application prospects. .

In recent years, regenerated cellulose fibers have been extremely active, such as Mozart, bamboo pulp fibers, Lyocell (including Tencel), acetate fibers, copper ammonia fibers, etc., among which Lyocell (including "Tiansi") is a kind of green fiber, especially It is a sulfonation process in which carbon disulfide is removed from production. It should be said that it has epoch-making significance in the production of viscose products. At present, the one-time investment is large, the product cost is still high, and the processing of its products has certain technical difficulties, but should Continue to develop and develop strengths and avoid weaknesses.

2. Reduce pollution during dyeing and finishing

China's dyeing and finishing technology should actively research and develop less water or waterless technology, energy saving technology, less pollution or pollution-free technology. For example, in the pre-printing treatment, active use of biological enzyme technology, high-speed, high-efficiency short-flow technology, research and development of plasma processing technology; less use of PVA slurry in the weaving process. Under the premise of ensuring the quality of dyeing and finishing products, actively adopting the technology and equipment for energy saving, water saving and consumption reduction, such as the use of cold-rolled pre-treatment and cold-rolled reactor reactive dyeing, etc., we must actively pay attention to the development and utilization of reactive dyes, paying attention to The development of dyes and additives.

It attaches great importance to the application and research and development of paint printing and dyeing. The biggest advantage of coating printing and dyeing is that it reduces the steaming and washing processes of post-treatment. It is an energy-saving and water-saving short process. At the same time, it can be used in different fiber raw materials. The development of component products is also extremely advantageous. Of course, the biggest problem of paint printing and dyeing is the fastness, feel and opacity, which restricts the pattern, color and grade of printing and dyeing products. If the research and development can make a breakthrough, it will be a good thing.

China's dyeing and finishing technology, from wet and dry treatment, from chemical treatment and mechanical treatment, has been a great development in high-tech applications. High-end finishing technology and equipment have also been introduced in recent years, and the emergence of new raw materials has also continuously promoted the development and improvement of dyeing and finishing technology. In the future development, the proportion of household and decorative, as well as industrial textiles will continue to increase, multi-component, functional, intelligent, high-tech products will continue to increase, will become a powerful traction and driving force for dyeing and finishing technology.

3. Actively treat wastewater

Printing and dyeing wastewater is a kind of organic wastewater with high chroma, mainly synthetic organic matter and high concentration. It is also an industrial wastewater that is difficult to treat. The level of dye production in China is quite different in foreign countries, the dye dyeing rate is low, and the amount of additives is large, which increases the pollution load of the textile printing and dyeing industry. For large textile mills, the common process for wastewater treatment in the textile industry is a first-grade aerobic treatment process. Recently, some large textile production plants have adopted secondary anaerobic-aerobic technology. After anaerobic-aerobic treatment, the COD and BOD removal rates of wastewater can reach 70% and 95%, respectively.

Most small and medium sized textile mills do not have biological treatment facilities. Precipitation or primary treatment is used in some plants to reduce the concentration of suspended solids in the wastewater and a portion of the BOD. Some small and medium-sized textile mills also use chemical treatment methods (such as flocculation). It must be emphasized that chemical treatments are generally more expensive due to the addition of chemicals. Industrial production practices have shown that it is difficult to meet the emission standards by simply treating chemical industry wastewater with chemical methods.

The "three wastes" treatment in the textile industry is a major event, especially sewage treatment. From the development trend, it should be started from the source, but at the same time, we must continue to research and develop new wastewater reuse technologies. For example, the recycling of boiled silk and silk water and the recovery of rinsing water during printing and dyeing can be used for plant greening, road vehicle washing, constructed wetland construction, etc., in order to achieve reuse of water, save water resources, and reduce the acceptance of water bodies. Pollution.

In short, in the next few years, we must vigorously develop circular economy in the three levels of enterprises, industrial clusters and the whole industry in accordance with the scientific concept of development. In the first two decades of this century, we will initially establish low resource consumption and less environmental pollution. The overall goal of the national economy system and the resource-saving society with good economic benefits makes the textile industry's due contribution

Natural Yarn

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