Technology And Effect Of Energy Saving And Emission Reduction In Knitted Printing And Dyeing Enterprises

< p style= "text-align: center" > < img src= "/uploadimages/201305/16/20130516034609_sj.JPG" align= "center" border= "0" alt= "/" < < > >

< p >

< p > 2012, China's < a href= "http://www.91se91.com/news/index_c.asp > > printing and dyeing industry < /a > has selected the Sixth Batch of recommended catalogue of advanced technologies for energy saving and emission reduction in China's printing and dyeing industry, with a total of 25 items.

In this issue, we will publish the "integrated technology and application of energy saving and emission reduction for knitted dyeing and printing enterprises" of Changzhou Xu Rong knitting and dyeing Co., Ltd., and hope that enterprises will actively adopt advanced technology of energy saving and emission reduction combined with their own circumstances to enhance the level of cleaner production.

For more needs, please contact the editor.

< /p >

< p > technical content introduction < /p >

< p > this project belongs to the area of clean production, energy saving and emission reduction and water pollution control in the printing and dyeing industry.

Aiming at the knitting and dyeing industry, through the innovation of dyeing and finishing technology (pretreatment and dyeing), the large-scale production of cold pfer printing technology and the recovery of solar energy preheating, the integrated technology of energy saving and emission reduction in knitted dyeing and printing industry has been formed, so as to achieve the goal of reducing water consumption, reducing emissions, increasing production output and increasing economic benefits.

The key technologies of project research and development include: energy saving, low carbon cold pad batch pretreatment, and high efficiency short flow dyeing technology (including cotton fabric dyeing and bath one bath process and TC dyeing and dyeing one bath process), cold pfer printing large-scale production process, and solar hot water recycling technology.

< /p >

< p > basic principle < /p >

< p > a href= "http://www.91se91.com/news/index_c.asp" > energy saving low carbon < /a > cold pad batch pretreatment, high efficiency short flow dyeing technology (including cotton fabric dyeing and bath one bath process and TC dyeing and finishing process), cold pfer printing large-scale production technology, and Tai Yang preheating water recovery technology.

< /p >

< p > energy saving and low carbon cold pad batch pretreatment is developed for printing and dyeing cotton knitted fabrics.

In view of the fact that the conventional in cylinder refining bath is relatively large, the waste of pretreatment additives is increased, the burden of sewage treatment is increased, and the production cost is wasted. The cold pad batch pretreatment equipment and auxiliaries are used for pre-treatment of cotton / Spandex Knitted Fabrics, and the fabric of the actual production is compared with that of the cold pretreatment before treatment. The whiteness and wool effect of the treated fabric are measured and analyzed, and the color of the finished fabric is measured and analyzed after being dyed with different colors. The color fastness of the fabric is evaluated, and the dyeing fastness of the fabric is determined. Finally, a comprehensive evaluation of the technology is made according to the shortening of the technological time and the reduction of the cost.

< /p >

< p > high efficiency short flow dyeing technology is developed for printing and dyeing cotton and polyester knitted fabrics.

Aiming at the problems of dyeing process, energy consumption and time consuming, low cost and high yield of conventional polyester cotton blended fabric, a new dyeing process with high efficiency and short flow is adopted.

Among them, the one bath dyeing process will omit the traditional pretreatment process without affecting the subsequent dyeing process. It is suitable for all medium and dark color systems, including sensitive and non sensitive colors, and has excellent water saving and energy saving functions. The production cost is reduced by 22.9%, 28.6% and 31.5% respectively.

Among them, TC dyeing, one bath, two stage dyeing, medium dark coloring, simultaneous refining and dyeing of polyester fiber, no need to restore dyeing process directly immersed in dye solution dyed cotton, solved the traditional dyed polyester cotton double dyeing two bath dyeing medium and deep color needs high bath ratio, repeated washing, time consuming, energy consumption, easy to appear color flowers and other issues.

By adopting the new dyeing process with high efficiency and short flow, it can reduce the cleaning process after dyeing the polyester fiber after the traditional process. The dyeing of polyester cotton single cloth can save 5 water consumption, shorten the production time, reduce energy consumption, increase production efficiency and reduce the cost compared with the traditional technology festival at 5.5 hours.

< /p >

< p > technological innovation < /p >

< p > 1. energy saving low carbon cold pad batch pretreatment.

In view of the fact that the conventional in cylinder refining bath is relatively large, the waste of pretreatment additives is increased, the burden of sewage treatment is increased, and the production cost is wasted. The cold pad batch pretreatment process is used to pre treat cotton / Spandex Knitted Fabrics, and the production capacity is greatly improved, water saving and steam saving are reduced, and the comprehensive cost is reduced.

< /p >

< p > 2. high efficiency short flow dyeing technology.

Aiming at the common dyeing process of cotton / polyester cotton fabric, energy consumption and time consuming, dyeing is carried out by C dyeing and one bath process and TC dyeing and finishing process. Meanwhile, the production time is shortened, energy consumption is reduced, production efficiency is increased, and cost is reduced.

< /p >

< p > 3. large scale production process of cold pfer printing.

In view of the low fixation rate of traditional circular and flat screen printing, resulting in waste of dyes, waste water and high energy consumption, a new cold pfer printing process is adopted to enhance the utilization rate of dyes, cool down and fix colors at room temperature, and save energy and reduce emissions.

At present, the cold pfer printing technology has the problem of thin fabric printing and fine pattern easy to seep in the mass production of factories. The problem is solved well by controlling the efficiency of semi-finished products and the liquid ratio of alkali rolling.

< /p >

< p > 4. solar energy pre hot water recovery technology.

In view of the shortage of non renewable energy sources such as electricity, coal and oil, and the steam consumption of printing and dyeing enterprises accounts for the first part of the power cost, the adoption of solar energy pre hot water recovery technology can effectively reduce the steam consumption of enterprises, increase production efficiency, and achieve the goal of energy saving and emission reduction.

< /p >

< p > application scope < /p >

< p > aiming at the common problems of typical printing and dyeing enterprises in China, such as large amount of discharge, large consumption of water, high energy consumption and low utilization rate of resources, through the application breakthrough of cold pad batch pretreatment, short flow dyeing technology, cold pfer printing large-scale production process, solar preheating water recovery technology, and other optimized technologies, the integrated technology of energy saving and emission reduction in knitted dyeing and printing enterprises has been formed, providing an overall technical solution for energy saving, emission reduction, cost reduction and efficiency enhancement in the knitting and dyeing industry.

< /p >

< p > energy saving and emission reduction effect < /p >

The key technologies for research and development of < p > include: energy saving, low carbon cold pad batch pretreatment, and high efficiency short flow dyeing technology.

Annual savings of 17716 tons of steam, 1 million 10 thousand M3 of water, 820 thousand M3 of emission reduction, 1 million 180 thousand kwh of electricity consumption, 3680.75 tons of emission reduction of CO2 gas and 24.29 tons of SO2 gas, and its comprehensive cost is reduced by more than 40%, with an average annual profit of about 8 million 570 thousand yuan.

< /p >

< p > input-output feasibility analysis < /p >

< p > input cost and operation cost: subdivided into water consumption, electricity consumption and others.

< /p >

< p > cold pad batch pretreatment technology, with an investment of 1 million 900 thousand yuan, save 3500 tons of steam every year, save about 100 thousand m3 per year, reduce emissions by 80 thousand M3 annually, save electricity 100 thousand kwh throughout the year, and save 1 million 190 thousand yuan annually.

High efficiency short flow dyeing technology, with an investment of 500 thousand yuan, can save 114 thousand M3 of water every year, and at the same time, reduce emissions 102 thousand and 600 m3 and save 490 thousand yuan annually.

For cold pfer printing, it will invest 6 million 770 thousand yuan, save 46.26 tons of steam annually, save 1 million 75 thousand and 200 kwh of electricity, save 800 thousand M3 of water, reduce waste water discharge by 640 thousand M3, and save 3 million 960 thousand yuan annually.

Solar energy pre hot water recovery technology, invest 13 million yuan, save steam 14170 tons, fold coal (equivalent) 1400 tons, achieve annual emission reduction of CO2 gas 3680.75 tons, SO2 gas 24.29 tons, save 2 million 930 thousand yuan annually.

< /p >

< p > the total amount of the above items is 22 million 170 thousand yuan, and the whole year can save 8 million 570 thousand yuan, < a href= "http://www.91se91.com/news/index_c.asp" > investment < /a > the recovery period is 2.6 years.

< /p >

< /p >