Principle And Application Of Continuous Rapid Scouring And Bleaching Of Cotton Fabric At Low Temperature

< p > > a href= "//www.sjfzxm.com" > cotton fabric < /a > low temperature continuous fast scouring and bleaching process, using self-developed low temperature scouring and bleaching agent, and adopting high liquid technology, the cotton fabric has been produced in a conventional continuous oxygen bleaching line at low temperature for one bath and one step.

The new process is in the process of feeding and bleaching. The scouring and bleaching working fluid (with liquid rate 100%) to room temperature scouring and bleaching (35 C ~40 C, net belt box stacking 75min~90min), seven steaming boxes, hot washing (three 60 C ~65 C, four four ~95 C) drying.

< /p >

< p > compared with the traditional process, the new technology reduces the stacking time from 12h~24h to 75min~90min; the total dosage of chemicals can be reduced by more than 40%; the steam volume is reduced by more than 50%; the COD value of sewage is reduced by 40%, and the pH value is reduced from 12 to 7~8.

Energy saving, emission reduction, economic and social benefits are outstanding.

This project has restored the traditional principle of high temperature desizing and bleaching of hydrogen peroxide, and has achieved a room temperature desizing, scouring and bleaching one bath process by using the characteristics of auxiliaries.

The temperature of traditional scouring and bleaching process is reduced from 100 to 40 C.

The developed scouring and bleaching agent has the functions of scouring, stabilizing, activating, removing wax and washing. It abandons the water glass, ensures the quality of semi-finished products and feels soft, and realizes the process of quick, efficient, energy saving and emission reduction.

< /p >

< p > the project breaks through the disadvantages of low efficiency of traditional cold reactor technology and high energy consumption of continuous steaming process. Independent innovation has developed a low-temperature rapid scouring and bleaching agent, and has realized the continuous one bath one step desizing and scouring and bleaching process of cotton fabric on the existing conventional continuous oxygen bleaching line by using high feed liquid technology.

Pretreatment of cotton fabric can be used in < a target= "_blank" href= "//www.sjfzxm.com/" > textile < /a > industry for < a href= "//www.sjfzxm.com/news/" > knitted < /a >, yarn dyed fabric and yarn or intermittent scouring and bleaching processing.

< /p >

< p > annual production of 6750 tons of grey cloth in a production line, compared with the two stages of the process of desizing and boiling, saving 11576.25 tons of steam per year, reducing electricity consumption by 183 thousand and 600 degrees, reducing water consumption by 83 thousand and 363 tons per year, reducing the amount of caustic soda by 263.25 tons, reducing the total amount of chemical products by 286.875 tons annually, and reducing the total amount of 2 million 480 thousand yuan annually. Compared with the traditional process of recycling and boiling, three tons of steam are saved, 21448.125 tons per year, electricity saving 405 thousand degrees, and water saving 21448.125 tons.

< /p >

< p > the process route of the project is reasonable. < a href= "//www.sjfzxm.com/news/index_c.asp" > equipment < /a > has compact components, convenient operation, energy saving and emission reduction, and has been put into industrial mass production for nearly one million meters.

The cost of steam, water, electricity, additives and so on is lower than that of conventional process, and its economic and social benefits are remarkable. It has broad application prospects and the technology has reached the international leading level.

The cost of boiling and bleaching per ton of grey cloth is 1.21 tons of steam, 36 times of electricity consumption, 10.4 tons of water and 32.5 kg of auxiliary agent, and the total cost is 488.1 yuan.

The cost is reduced by 367.42 yuan per ton compared with the two stage process, and the cost is reduced by 689.825 yuan per ton compared with the three stage process.

< /p >