Green And Environmental Protection: "Low-Carbon Dyeing And Finishing" Reduces Water Resource Consumption And Sewage Production By 95%

In the morning of February 17, the Modern Textile Technology Research Institute of Wuchuang Institute (hereinafter referred to as "the Institute"), a laboratory located in the campus of Wuhan Textile University, was already a busy scene.

While conducting ozone bleaching process experiments for the nonwoven production line of Robust Medical (Wuhan) Co., Ltd., the researchers conducted final process commissioning for the application project of printing and dyeing pretreatment of knitted fabrics to be landed in Jingzhou.

"Both projects are based on low-carbon dyeing and finishing technology, which will speed up the cultivation of new quality productivity in the textile industry and promote the intelligent, green and integrated development of the textile industry." Ran Jianhua, one of the core members of the Institute's first start-up project - "low-carbon key technologies and industrial promotion and application of textile printing and dyeing pretreatment", and a senior experimenter of the School of Chemical Engineering of Textile University, said, "Whether it is time, temperature, pressure, or the concentration of the treatment solution, it is all related to the performance of the sample, and the parameters need to be constantly adjusted according to the experimental results."

One month ago, the Institute officially started operation through expert argumentation. This low-carbon dyeing and finishing technology project, ozone, as the core technology of textile bleaching process, was also launched on the same day, which solved the problems of large use of chemicals, large water consumption, large energy consumption, long time consumption, and unstable product quality in the traditional bleaching process.

Before printing and dyeing, cotton fabric must be desized and bleached to meet the requirements of printing and dyeing process. According to statistics, every 1 ton of cloth produced by the traditional printing and dyeing process generates about 100 tons of sewage.

"Compared with the traditional dyeing and finishing process, water resource consumption and sewage generation decreased by 95%, auxiliary agent use decreased by 50%, power consumption decreased by 50%, carbon emissions decreased by 95%, and total production cost decreased by 70%." Bi Shuguang, another core member and distinguished professor of the Textile College of Textile University, told the Changjiang Daily that the team began to develop this technology in 2018, It took nearly three years to get the "optimal parameters" in the laboratory.

It was not until it was "discovered" by Wuchuang Institute that this disruptive technology in the textile industry had the opportunity to "walk" from the laboratory to the market.

"With our new process production line, we just need to let the long car pass through the ozone box, and the bleached cloth will come out." Bi Shuguang introduced that the team is developing ozone finishing technology and complete equipment for Robust Medical (Wuhan). After the project is launched, not only energy consumption and pollution will be greatly reduced, but also continuous production will be realized, and the traditional process production process will be completely changed.

More than half a month ago, the project team of the Institute participated in the centralized commencement of major projects in Jingzhou in the first quarter of 2024 and the commencement ceremony of the textile printing integrated industrial park. "The low carbon key technology and industrial promotion and application project of knitting printing and dyeing pretreatment is expected to complete the final test verification of the project in the third quarter of this year, and the first production demonstration line will be put into construction in batches after verification." Ran Jianhua said that the project implementation will further improve production efficiency and product quality, and accelerate the realization of the "cocoon breaking" butterfly change of our textile printing and dyeing industry.

(Source: Changjiang Daily)