Key Technologies For Textile Low Temperature Pretreatment Will Be The Focus Of Attention Of The Industry.

< p > to promote clean production of < a href= "http://www.91se91.com/news/index_c.asp" > printing and dyeing industry < /a >, it is an important way to reduce the temperature of pre-treatment process and reduce the use of chemicals, and it will also be an inevitable choice.

The key technology of low temperature pretreatment for textiles, which was jointly completed by Donghua University, China Textile Limited by Share Ltd and Qingdao blue biological Group Co., Ltd., won the first prize in textile science and technology progress in 2013. It has become the focus of energy conservation and emission reduction in the printing and dyeing industry.

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< p > < strong > the details of tackling key problems were finally industrialized. < /strong > < /p >

< p > "water consumption, energy consumption and CODCr emissions of fabric pretreatment process account for 55%~60% of the whole process of dyeing and finishing."

Mao Zhiping, an adult and Donghua University, said that the cold pad batch pretreatment has been mature and applied by industrialization in the low temperature pretreatment technology of fabrics. Although the process is energy efficient, its use of chemicals and pollutant emissions are significantly higher than those of conventional processes, which is not really a clean production technology.

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< p > < Li Chunguang href= > http://www.91se91.com/news/index_c.asp > > executive director of engineering technology center of Hua Fang shares < /a > Co., Ltd., Li Chunguang, introduces that the research on reducing H2O2 bleaching temperature by using organic activator is limited by the cost and efficiency of organic activator, and no matter whether it is international or domestic, the technology has not really realized industrial application.

Against this background, the key technology of low temperature pretreatment for textiles has successfully developed a series of pretreatment processes for textile low-temperature, high efficiency desizing, scouring and bleaching, and has truly realized the industrialization application of grey cloth pressing and low-temperature pretreatment.

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"P" makes the industrialization of low temperature pretreatment technology realized, thanks to several major innovations in the project, that is, key technology of synthesis of enzyme catalyst ligand, key technology of compound enzyme catalyst compound synergism, key technology of low cost and high alkali resistant pectinase industrialization, and development of pretreatment technology for low temperature system of fabric.

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< p > < a > href= > http://www.91se91.com/pioneer/ > > Mao Zhiping < /a > introduces several main contents in detail. First of all, aiming at the bottleneck problem of low efficiency and high cost of low temperature bleaching of H2O2, we have innovated and designed an efficient enzyme mimic enzyme for metal complexes, and issued a short process synthesis process to achieve large-scale production.

The Synergistic Technology of organic activator - metal mimetic enzyme catalyst was studied, which improved catalytic efficiency while significantly reducing the cost of catalyst. Its cost was less than 1/5 of organic activator four acetyl ethylenediamine.

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< p > secondly, using the technology of directional gene pformation to improve the production of alkaline alkaline pectinase producing bacteria, constructing alkaline pectinase engineering bacteria, improving the alkali resistance and H2O2 tolerance of pectinase, optimizing fermentation technology and developing liquid enzyme protection technology, and taking the lead in realizing the commercialization of liquid alkaline pectinase in China.

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< p > finally, the H2O2 catalytic stabilization control system was established to control the decomposition rate of H2O2 in the bleaching process accurately, develop the efficient low temperature wax removing auxiliary, improve the wool effect of low temperature pretreatment fabric, develop a series of low temperature pretreatment process by using alkaline pectinase and mimetic enzyme catalyst, reduce the desizing refining temperature to 35 degree C~40 degree C, and bleach temperature to a minimum of 50 degrees C, and truly realize the pretreatment and processing of gray cloth according to the quality and on demand.

The unit product can save water 10%, save energy 35%, reduce CODCr emissions by more than 10%, and save energy and reduce emissions.

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< p > < strong > clean production and re wind vane > /strong > /p >

< p > in the years of popularization and application of the project, 5 extension bases have been set up and 9 demonstration lines have been built.

In 2010 ~2012, 5 Application enterprises had accumulated new output value of 359 million 450 thousand yuan, with an additional profit of 60 million 442 thousand yuan.

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< p > the results of the social environmental benefits that the industry is paying close attention to is remarkable.

The project has successfully realized the industrialization of textile enzyme degumming Scouring Technology by using domestic enzyme preparation. The desizing temperature has been reduced to 40 ~80 C, the dosage of alkali agent has been reduced by 90%, and the dosage of surfactant has been reduced by more than 50%.

The imitated enzyme catalyst was introduced into the printing and dyeing industry, and the pretreatment of textiles at low temperature was successfully realized. The bleaching temperature of the textile was reduced from 100 to 50 ~80 C.

The national cotton fabric processing capacity is 30 billion M / year, the technical achievement of the project is 30% according to the popularization rate, it can reduce water consumption by 9 million tons / year, save standard coal 800 thousand tons / year, reduce COD emission 2500 tons / year, reduce the amount of caustic soda 27 thousand tons / year.

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< p > how to truly realize cleaner production is the way to realize healthy and sustainable development in printing and dyeing industry. The key technology of low temperature pretreatment of textiles has set up such an example.

Experts and enterprises have said that this technology has broken through the large-scale production technology of alkaline pectinase, and promoted the progress of the bio enzyme industry. It broke through the low cost and mass production technology of mimetic enzyme catalyst, promoted the application of high efficiency accelerator in the printing and dyeing industry, contributed to the technological innovation of printing and dyeing industry, significantly reduced the energy consumption of textile pretreatment, and reduced COD emissions, which is of great significance for promoting energy saving, emission reduction and sustainable development in the printing and dyeing industry.

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