Textile printing and dyeing industry ushered in a new technology of green vitality and opened the "environmental protection revolution"
In recent years, the treatment of printing and dyeing industry, the major polluter in China, has never stopped. As one of the typical representatives of traditional industry, textile printing and dyeing industry is not only facing high environmental protection pressure and rising enterprise costs, but also has reached the critical point of industrial innovation due to backward equipment and technology and serious environmental pollution.
At present, how to save costs and achieve ecological and environmental protection has become a difficult problem for many printing and dyeing enterprises to tackle urgently.
At the beginning of this year, the first eco-optoelectronic intelligent printing and dyeing plant in China was put into operation. This factory, named Suzhou Dilian Environmental Protection Technology Co., Ltd., is located on the Bank of Taihu Lake, a scenic spot in Wujiang District, Suzhou City, Jiangsu Province. As we all know, Taihu Lake Basin is a key ecological protection area in China. The state strictly prohibits the existence of any polluting enterprises within 10 kilometers of Taihu Lake. What kind of eco-environmental protection technology can make printing and dyeing enterprises put into operation in scenic areas? You might as well follow the reporter of the Economic Daily to have a look.
Traditional technology urgently needs to be innovated
Traditional cylinder dyeing technology leads to fabric printing and dyeing becoming a highly polluting industry, and new technology brings dawn to the industry.
The textile printing and dyeing industry in Wujiang District of Suzhou has a long history. It is a well-known gathering area of textile printing and dyeing industry in China. It is one of the four famous textile bases in China. Shengze Town alone has more than 5,000 textile enterprises with an annual output of tens of billions of meters of cloth. Once upon a time, textile printing and dyeing industry created a lot of wealth, but also brought serious environmental pollution.
Textile printing and dyeing industry follows the traditional cylinder dyeing technology for more than 2000 years, which uses liquid water to complete the dyeing process, commonly known as "washing big pool". It is estimated that a small-scale printing and dyeing plant will produce at least 2,000 tons of wastewater and 10 tons of sludge in a day. In order to return Taihu Lake to clean water, local government departments at all levels have frequently made heavy efforts to control pollution. In recent years, a number of small and medium-sized printing and dyeing enterprises have been shut down.
China is a major textile producer in the world - in 2016, the textile printing and dyeing industry amounted to 380 billion yuan, accounting for more than 80% of the world's output. According to statistics, the total amount of dyeing cloth in China is 53.3 billion meters per year, and every 100 meters of dyeing cloth will produce 3 to 5 tons of wastewater - about 2.1 billion tons of wastewater discharged in one year, which is equivalent to the water storage of 150 West Lake in Hangzhou. For a long time, the relevant government departments and enterprises have spent a lot of money to rectify the pollution of the printing and dyeing industry, but they have not been fundamentally solved at the source.
"It is enough to prove the environmental protection reliability of the eco-optoelectronic intelligent printing and dyeing system technology that it can be put into operation at the beautiful bank of Taihu Lake." In Dean's office, the company director pointed to Taihu Lake not far away and told reporters that it is less than 5 kilometers away from Taihu Lake, which is within the strict control of the state. The reason why enterprises can put into operation smoothly is that they do not have boilers and truly achieve "zero discharge" of waste water and exhaust gas. Eco-optoelectronic intelligent printing and dyeing system technology makes Shengze Town's printing and dyeing enterprises see new vitality.
New Technology Opens "Environmental Revolution"
Green Eco-optoelectronic Intelligent Printing and Dyeing System Technology Really Achieves High Production Efficiency and Zero Emission
According to Qiu Jizhong, chairman of Dilian Environmental Protection Technology Co., Ltd. and inventor of ecological photoelectric intelligent printing and dyeing system technology, from 2010, Dilian carried out scientific and technological research on the characteristics of traditional cylinder dyeing process, such as high pollution, high energy consumption and low efficiency. After eight years of independent innovation, Dilian finally independently developed DLN green ecological photoelectric intelligent printing. Dyeing system technology has successfully changed the traditional process of cylinder dyeing cloth which has been used for 2800 years. Qiu Ji said, "This is the beginning of a"zero discharge"and"environmental protection revolution"in textile printing and dyeing industry. I believe that printing and dyeing wastewater, which accounts for about 10% of the total discharge of industrial wastewater in China, is expected to be fundamentally treated.
Qiu Jizhong introduced that the core of the technology of eco-optoelectronic intelligent printing and dyeing system is to use a new dye and photoelectric technology, and cooperate with a process of instantaneous dyeing, which completely overthrows the traditional cylinder dyeing process - no need for watermarking dyeing and cleaning, no need for traditional wastewater treatment, no need for boiler hot gas supply, the whole process. The environmental protection production of "zero discharge" of waste water, waste gas and sulfide has been realized. At present, the technology of eco-optoelectronic intelligent printing and dyeing system has obtained many national patent certificates.
Dillian currently has three eco-intelligent printing and dyeing production lines. When the reporter entered the workshop, he saw a large roll of white blank cloth uniformly colored instantly after passing through the drum and dye tank on the production line. Then it was sent to the rolling car to be extruded by a special process flow, and then dried in a high temperature oven with the highest temperature up to 245 degrees Celsius. After a few minutes, the uniform and brilliant red cloth was continuously exported from the other end of the oven. Compared with traditional printing and dyeing plants, Dillian's production site has no pollution such as sewage cross-flow, steam overflowing, odor pungent and so on. Moreover, each production line only needs 4 employees to operate and manage, the site is orderly and the production efficiency is very high.
Qiu Jizhong said that the millions of meters of finished fabrics dyed by them had been tested many times by authoritative institutions (SGS/BV/ITTC, etc.). The quality indexes such as color fastness, color difference and safety of chemical additives met the national and European Union standards. Dean has become a star demonstration enterprise in the protection of local ecological environment. The birth of ecological photoelectric printing and dyeing system has brought new vitality to the transformation of local printing and dyeing industry.
Significant economic and ecological benefits
If the technology of eco-optoelectronic intelligent printing and dyeing system is widely applied in textile printing and dyeing industry, the benefits will be immeasurable.
It is reported that in the same production time, an eco-intelligent printing and dyeing production line is better than the traditional cylinder dyeing process.