Textile Low Carbon Technology, Remote Control, "Green Upgrading"

"Green and low carbon" has become a new theme of global development. How should China's textile industry with relatively backward technology and serious pollutant emissions meet the challenge? Recently, journalists visited experts and scholars in the textile industry and the scientific and technological circles. They pointed out that only by speeding up the integration with the "low-carbon era" and speeding up technological breakthroughs to achieve "green upgrading" can we get out of the predicament.

Chinese textile industry encounters " Low carbon "Bottleneck"

Textile industry is an important livelihood industry in China. It is also an important pillar industry of the national economy and one of the industries with obvious international competitive advantages. Over the past 20 years, the textile industry has interpenetrated with nano technology and information technology. The quality of civilian textiles has been continuously improved. Fiber products have been developing towards high performance and intelligence. They have become an important basic material for industry, agriculture, military, transportation, civil engineering, medical and health.

Sun Jinliang, academician of the Chinese Academy of engineering, said that at present, China's textile industry fibre Processing accounts for 50% of the world's total, and textile and garment exports account for 14.4% of the world's exports. According to incomplete statistics, in 2008, there were 5 Enterprises above Designated Size in the textile industry, and third of the 32 industries in the country. The number of textile workers accounted for 14% of the total number of Industrial Enterprises above Designated Size, and the added value of textile industry accounted for 8% of China's industrial growth.

However, there is still a clear gap between China's textile engineering technology and advanced foreign countries. Sun Jin Liang It is said that from the forepart of the industrial chain, textile fiber materials are made in large quantities, but the development of textile fiber materials is low, the development of medium and high-end fabrics is not enough, and the proportion of industrial textiles in textile products is low. In particular, "the 175 existing products in the textile industry have won the title of national brand, but there is not a world famous brand". From the perspective of equipment and information level, there is still a big gap compared with the advanced level of the world. From the perspective of environmental impact, China's textile printing and dyeing industry has a serious pollutant discharge. "In 2007, the water consumption of China's cotton dyeing and printing unit was 2 times that of the United States in 1990s, and the comprehensive energy consumption was 2.4 times that of Canada in 1990s. "

With the wide recognition of low carbon economy mode and low carbon development concept, pollutant discharge has become a collective bottleneck in China's textile and dyeing industry. Professor Yu Jianyong, vice president of Donghua University, pointed out that the development of the textile industry is increasingly constrained by resources and environment as the whole manufacturing process of the textile industry is relatively long, resources are consumed and pollution is enlarged.

Shen Anjing, vice president of Shanghai Textile Science Research Institute, said: "the low carbon test faced by China's textile industry is very severe. Especially in developed countries, the implementation of the" carbon tariff "will make the Chinese textile industry at the low end of the textile supply chain suffer a great impact. "He said for example, a 400 gram polyester pants, if life expectancy 2 years, washing, drying, ironing will produce carbon dioxide emissions of 47 kilograms, and a 250 grams of cotton T-shirt," life "will emit 7 kg of carbon dioxide.

Accelerate convergence with the "low carbon era"

How to solve the dilemma? Yu Jianyong believes that China's textile industry should focus on the two major scientific and technological issues affecting the sustainable development of the textile industry, namely, material development and ecological manufacturing. The key scientific theories and engineering issues involved in the study are formulated, and the development strategy is formulated. "Simply speaking, the textile industry as an important industry in the national low carbon development plan must accelerate its integration with the" low carbon era ".

According to the "mid long term development strategy of Chinese textile engineering technology" formulated by the research group of the medium and long term development strategy of China textile engineering technology, to meet the green needs of the social environment, the major task of China's textile engineering technology in twenty-first Century will be to develop energy saving, low emission, low consumption and low carbon technologies, processes and materials; to promote cleaner production and develop clean products; to provide consumers with healthier, safer and greener products; to implement recycling economy, and to develop degradable, renewable, recyclable materials, such as biomass fiber materials, for traditional fields and new fields.

Difficulties and goals have been very clear, and how China's textile industry will respond to the "low carbon test"? Shen Anjing has made recommendations: first, enterprises need to improve their leaders' decision-making and awareness, and plan long-term strategies in the overall layout; secondly, to enhance the ability of enterprises to develop low carbon economy, in addition to the construction of hardware facilities, we should also strengthen the research of soft technology, especially the establishment of carbon emission assessment, monitoring system and corresponding information system; thirdly, we should develop low-carbon economy training and basic work, formulate relevant standards for textile low carbon economy, at the same time, we must find out the source of energy conservation and emission reduction of enterprises, independently develop low carbon textile standards, and win the initiative and the right to speak in international trade.

In addition, Shen Anjing also pointed out that the carbon label clothing industry is a good opportunity. "The profit and competitive advantage of carbon label clothing is sustainable. The textile industry can seize the opportunity to integrate the resource allocation and supply chain, and develop a new low carbon textile clothing industry. "

In fact, China was approved by the State Council in 2009 and passed the "textile industry readjustment and revitalization plan" as one of the ten major industry revitalization plans. According to the plan, the energy consumption per unit added value of the textile industry will be reduced by 5% per year, water consumption will be reduced by 7% annually, and the amount of wastewater discharge will be reduced by 7% annually. By 2011, the printing and dyeing capacity of 7 billion 500 million meters high energy consumption, high water consumption and low technology level will be eliminated, and 2 million 300 thousand tons of chemical fiber backward production capacity can be eliminated.

"For the next 10 to 20 years, China's textile industry must shift from labor-intensive and resource consuming industries to technology intensive, resource-saving and environment-friendly industries. Through the implementation of some major projects, we should rely on scientific research personnel and industrialization efforts to promote the development of China's textile industry. "Sun Jinliang said.

"Green upgrading technology" is already exploring.

It is noteworthy that experts have been calling for the traditional textile industry to link up with low carbon and accelerate the realization of "green upgrading".

Yan Kelu, director of the national dyeing and finishing engineering technology research center and professor of Donghua University, said cotton fabric is the most important type of textiles, accounting for 50% of the total output of China's dyed fabrics. The processing capacity of cotton fabric in 2009 is about 27 billion meters. Water consumption and energy consumption of cotton printing and dyeing fabrics account for 55% to 60% of the whole process of dyeing and finishing. Therefore, the COD value of the pretreatment wastewater is very high, accounting for 60% of the total COD emissions from the printing and dyeing industry.

For this reason, the school has issued the key technology of "cotton fabric low temperature bleaching", which not only can greatly reduce the amount of caustic soda, but also can efficiently remove the cottonseed hull, and the wool effect, whiteness and strength of the treated cotton are all up to the quality requirements of semi products. Yan Kelu said that this technology can save energy by 30%, save water 10% and reduce pollutant emissions by 30%.

In addition, the school has won the two prize of the national science and technology progress in 2008. It has broken through the characteristics of heavy pollution of traditional dyestuff dyeing. "No salt, no water and continuous dyeing has been achieved. The dyeing depth has increased by more than 30%. At the same time, it has saved 40% of energy, saved 50% of water, saved 60% of dyes and chemicals, and reduced the discharge of pollutants by 95%. "Yan Kelu said.

What's more interesting is that researchers at Qiingdao University have successfully extracted fibers from seaweed and woven them into cloth with water as solvent and special equipment, making it possible for kelp to make clothes. {page_break}

According to the introduction, according to the existing production technology, a ton of dried kelp can extract 200 kg to 250 kg of alginate, and 100 grams of seaweed fiber can weave one square meter cloth. Xia Yanzhi, deputy director of the National Key Laboratory of fiber new materials and modern textile, Qiingdao University, said that researchers have been able to extract fibers from many algae, including brown algae, agaric algae, carrageenan, and even many algal bloom in the coastal waters of Bohai.

Because of its inherent flame retardancy and algal fiber contains large amounts of metal ions, seaweed fibers can effectively shield electromagnetic waves and play an anti radiation role. Xia Yanzhi said that these characteristics of seaweed fiber plus good textile processing properties make it not only be made into ordinary clothes, but also can be used for making special clothing such as fire-fighting clothing, protective clothing and medical clothing.