Textile companies take the "first step" in green production

Bio-textile enzyme technology results conference site

Biological enzymatic pretreatment experiment site

On July 26th, Hebei Province Ningfang Group, the largest textile enterprise in Hebei Province, held a technical conference on the desiccant refining bio-complex enzyme preparation and pre-dye treatment process. Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences The newly developed textile bio-enzyme preparation was released.

"Whether it is a doctoral or graduate student, as long as they enter the printing and dyeing workshop, they are no different from ordinary workers." Gao Zhongqiang has worked in the textile industry for half a lifetime. He is an old employee of the original Tianfang Group. He is currently working in Tianjin Textiles Supply and Marketing Co., Ltd. Manager.

A few years ago, Gao Zhongqiang met with the research team of Song Wei, a researcher at the Tianjin Institute of Industrial Biotechnology of the Chinese Academy of Sciences (hereinafter referred to as Tianjin Institute of Labor and Biotechnology), and learned that they developed a complex enzyme preparation for the current cold reactor and long-term textile enterprises. The pre-treatment process is applicable and the cooperation is also carried out.

On July 26th, Hebei Province Ningfang Group, the largest textile enterprise in Hebei Province, held a technical conference on the desiccant refining bio-enzyme preparation and pre-dye treatment process. Tianjin Institute of Labor and Technology released the latest development. A textile composite enzyme preparation for textiles.

Song Wei told reporters: "The enzyme preparation is specially designed for the pre-dyeing treatment of textile desizing and refining. It replaces the traditional alkali treatment process and will promote the Chinese textile industry from the traditional high energy consumption, high water consumption and high pollution process to green, environmental protection , sustainable development of new biological process of transformation and upgrading. "

Energy saving and emission reduction is an urgent task

The textile industry is one of the traditional pillar industries in China. It has an important economic status and a solid industrial base in China's light industry. However, it is unavoidable that the traditional textile industry is also an industry with heavy pollution, high energy consumption and high water consumption.

Gao Zhongqiang found that in the traditional pre-treatment process of desizing, scouring, oxygen bleaching and mercerizing in China, the application of a large number of chemical preparations such as caustic soda and additives not only consumes a lot of water and energy, but also causes serious environmental pollution. .

According to statistics from the Tianjin Institute of Labor and Health, the energy consumption per unit of fabric in China is 2.4 times that of the world average; the traditional high-temperature alkali dyeing and finishing process consumes a lot of steam, alkali and chemical additives, taking cotton fabrics as an example. The treatment of 10,000 meters of cotton fabric requires 300 tons of water; the processing temperature is 95-100 ° C, accounting for 45% of the total process energy consumption; the fiber is easily damaged and the equipment is easily damaged.

Song Wei pointed out that the above problems have seriously restricted the development of China's traditional textile industry. Even some large traditional textile enterprises in China have been forced to stop production under the pressure of higher and higher environmental protection.

To this end, she led the team to develop new enzyme preparations and green bio-textile processes for the status quo of China's traditional textile industry. The research direction has also been listed as one of the five key cultivation directions in the “One Three Five-Year Plan” of the Tianjin Institute of Labor and Health, and it has also received strong support from the Tianjin Science and Technology Support Program.

Research and development of complex biological enzyme preparations

Through close cooperation with Tianjin Tianfang Group and Hebei Textile Materials Supply and Marketing Co., Ltd., Song Wei team developed three kinds of high-quality textile enzyme preparations and their production processes, including amylase and alkaline pectin, in three years. Enzymes, xylanases, and catalase.

Song Yu explained from a professional point of view that the composite biological enzyme preparation for cotton fabric desizing and refining can not only efficiently decompose starch and pva (polyvinyl alcohol) pulp, but also efficiently and exclusively act on the outer structure of cotton fiber. The pectin layer loosens or even removes the cottonseed hull without damaging the cotton fibers.

Gao Zhongqiang introduced that the traditional pre-dyeing process includes five steps of singeing, desizing, refining, bleaching and mercerizing. The application of the enzyme preparation developed by Song Song team can combine desizing and refining into one step and improve the pretreatment. s efficiency.

Wherein, the textile enzymatic pretreatment process using the composite biological enzyme preparation is carried out at a low temperature, the processing temperature of the enzymatic long-wheel process is 50° C. to 55° C., and the processing temperature of the enzymatic cold reactor process is 25° C. to 35° C. Each saves steam by 50% and 25%; the enzymatic cold reactor process also reduces the water washing process of a track drive relative to the alkali process, which saves 40% of electricity.

More importantly, the waste water after enzymatic desizing and refining does not contain caustic soda, and does not require acid neutralization, which can save a lot of water resources and acidic reagents. Therefore, the pretreatment process of the enzymatic cold reactor can save 50% of water compared with the conventional process.

Since the bio-enzymatic pretreatment process replaces the caustic desizing and caustic refining processes in the conventional process, the enzymatic pretreatment process can generally reduce the amount of caustic soda by 40%, and can completely replace the chemical refining agent. Therefore, before the biological enzymatic method The treatment process can significantly alleviate the wastewater treatment pressure of textile enterprises.

The compound bio-enzyme preparation developed by the Song Wei team can also reduce fiber damage, improve product quality, reduce costs and improve economic efficiency. According to the Tianjin Tianfang Group project chief engineer, in the application of the pre-treatment process of the Tianfang Group, the enzymatic pretreatment of 12,000 meters of pure cotton cotton and 11,000 meters of aramid thermal wave cloth is compared with the traditional alkali process. Reduce costs by 30% and 70%, respectively.

100,000 meters of successful application demonstration

From May 2013 to March 2015, Tianfang Group applied the bio-enzymatic pretreatment process developed by Song Wei team to carry out small test and pilot test of military camouflage cloth, tent waterproof cloth, foam products and aramid series products. , succeeded.

After the completion of the pilot test by Tianfang Group, due to the relocation of the company, Tianjin Labor and Welfare Institute and Hebei Textile Materials Supply and Marketing Co., Ltd. reached a long-term cooperation intention. "Now, the two sides have joined forces to build a professional team integrating R&D, testing, production, and marketing." Gao Jianru, chairman of Hebei Textiles Supply and Marketing Co., told reporters.

From March to June this year, the Song Song team successfully completed the application demonstration and promotion of the 100,000-meter-boiled bio-enzymatic pretreatment process in Hebei Ningfang Group. "This provides a scientific and technological force for promoting the sustainable development of China's textile printing and dyeing industry , and will become a milestone in the development of the textile industry's technological revolution, bringing new hope to the sluggish textile industry." Gao Jianru said.

Song Wei said that the team will continue to cooperate with Hebei Textile Association to improve the technology promotion work, form a technical support group, and in-depth service to the nationwide printing and dyeing enterprises . It is expected that 10 to 20 textile enterprises will be promoted and applied in the next three years. Create new profits of between RMB 50 million and RMB 100 million.

She hopes that the bio-enzymatic pretreatment process will drive more textile companies to take the “first step” from traditional processes to green production, and bring significant economic, social and environmental benefits.