2011 New Technologies Recommended For Energy Conservation And Emission Reduction
The fifth batch of recommended catalogue of advanced technologies for energy saving and emission reduction in China's printing and dyeing industry ended.
Will be the exclusive one to publish 2011 energy saving
Emission reduction
New technology recommended projects, from the technical level.
Printing and dyeing enterprises
Industry for reference and reference.
Product Name: Key Technologies for low temperature bleaching of cotton fabrics
Completion: Donghua University, Huafang, Qingdao Kangdi.
Basic principles and technical characteristics
Using hydrogen peroxide alkaline pectinase and keratinase, combined with a variety of commonly used textile processing auxiliaries.
synergism
The biological enzyme and chemical assistants play their respective maximum performance, ensuring that all the performance indexes of the fabric can meet the requirements of subsequent processing after biological enzyme scouring and processing.
A hydrogen peroxide low-temperature bleaching catalyst (i. e. enzyme mimetic metal complex catalyst and amide catalyst complex) was designed, synthesized and screened to produce the best activation efficiency in the range of 70 to 80 degrees. The parameters of the bleaching catalyst in practical application were designed and optimized, and the physical and mechanical properties of the cotton fiber were guaranteed while the whiteness was obtained. Combined with the existing production line of the printing and dyeing mill, the optimal low temperature oxygen bleaching process was formulated on the premise that the original equipment was reconstructed as little as possible.
The basic principle is to screen and cultivate high effective hydrogen peroxide alkaline pectinase and keratinase producing strains. By using the efficiency and specificity of biological enzymes, the cotton fabric is desizing and scouring by biological enzyme, and the low temperature bleaching of cotton fabric is realized by the catalytic catalysis of hydrogen peroxide low temperature catalyst.
Technological innovation
1) synergistic effect of hydrogen peroxide alkaline pectinase, keratinase and chemical additives.
2) the best activation of hydrogen peroxide low-temperature activator can be achieved at 70 ~80 C.
3) 80 degree low temperature bleaching of cotton fabric.
Application: cotton fabric low temperature peroxide bleaching system.
Evaluation of application effect
The evaluation indexes of the desizing grade, wool effect, fabric hand feeling, cloth tidy and cottonseed shell removal were evaluated before processing the processed cotton fabric, and the effect of the application of biological enzyme complex technology was evaluated.
1) desizing grade: grade 7~8.
2) 30 minutes gross effectiveness is more than 8cm
3) whiteness is greater than 75.
4) the strength retention rate is more than 90%.
5) energy saving is more than 30%, water saving 10%, and the usage of alkali agent 30%.
Energy saving and emission reduction effect
The hydrogen peroxide alkaline pectinase not only can be used for low temperature bleaching of cotton fabrics, but also can be used for degumming of ramie and enzyme scouring of knitted fabrics.
Several kinds of Metal Complexes Catalysts with different structure types have been synthesized, and the hydrogen peroxide low temperature catalytic system suitable for low temperature bleaching of cotton fabrics has been obtained through synergistic combination with amide catalysts.
In 2011, using the existing production line of Huafang shares, combined with the appropriate pformation of the equipment, the best practical application process was worked out, and the large-scale production test achieved satisfactory results.
We have tried to produce 2 million 400 thousand meters, saving 115.2 tons of raw coal and saving 3360 tons of water.
The technology is in line with the requirements of energy saving and emission reduction in the country. The equipment is adaptable and applied to the textile printing and dyeing industry nationwide. It will be welcomed by the printing and dyeing enterprises.
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