Energy Saving And Emission Reduction "Three Axes"

In mid June, under the background of "the outline of scientific and technological progress of textile industry" in 12th Five-Year, the National Seminar on dyeing and finishing technologies and new practical technologies for energy saving and emission reduction was successfully held in Shanghai by the national dyeing and finishing technology application and promotion cooperation network, the national printing and dyeing technology information center, the Shanghai Textile Engineering Society dyeing and finishing Specialized Committee and the Shanghai printing and dyeing industry association.

The seminar focused on energy saving, emission reduction, improving the function of printing and dyeing products and promoting the popularization and application of Environmental Friendly Auxiliaries. The conference focused on practical and new technologies, environmental chemicals, processes and equipment, and discussed all aspects of energy saving and emission reduction.

Reporters learned that, at present, the domestic Printing and dyeing enterprise The three most effective axes to achieve energy saving and emission reduction are: updating and improving equipment; introducing new technology and new technology; strengthening management and reducing waste.

Unavoidable energy conservation and emission reduction

Recent incidents of dyed steamed bread, exploded watermelon, polystyrene talcum powder, and so on have increased our concern about the living environment, but this seems to be no more than the problem of the outbreak of cyanobacteria in Taihu caused by water pollution and the inability of drinking water in Wuxi. Energy saving and emission reduction has become a topic that cannot be opened for printing and dyeing enterprises. Generally speaking, the production cost of printing and dyeing enterprises is mainly composed of steam or energy consumption, labor cost, environmental pollution discharge, production water consumption and dye chemicals cost. With the continuous rise of electricity and steam costs, the proportion of energy cost in factories has moved to the first place of all costs. It is understood that the textile and dyeing industry is facing the challenges of energy, resources and ecological environment. The energy cost of printing and dyeing enterprises accounts for 30%~40% of the total cost, and the average profit of printing and dyeing industry is only about 3%. The whole industry has become a top priority for the printing and dyeing enterprises to transform equipment, invest less and continuously save energy and reduce emissions.

It is gratifying to note that the recognition of energy saving and emission reduction by domestic printing and dyeing enterprises is not comparable to that of other textile enterprises. The printing and dyeing enterprises have taken energy conservation, emission reduction and consumption reduction as the primary task of enterprise development, because energy saving and emission reduction are not only directly related to the high and low profits of each enterprise, but also a major event related to the survival of enterprises.

The best is for oneself.

Equipment is one of the important conditions for dyeing and finishing process. Printing and dyeing industry In order to promote energy conservation and emission reduction and sustainable development, the Ministry of industry and Commerce issued a revised version of the "printing and dyeing industry entry requirements" in June 2010. It is clear that new or expanded printing and dyeing projects should be selected with high efficiency, energy saving and low consumption. The selection of dyeing and finishing and related energy saving and emission reduction technologies during the expansion and technical transformation of enterprises.

Chen Liqiu, an expert on dyeing and finishing of China Textile Engineering Society, said that the selection of dyeing and finishing equipment should conform to the requirements of economic efficiency, clean production and reproducibility of the process. The equipment that is suitable for the production needs of oneself is the best. For example, in the process of production, the width of the process equipment and the effective match of the fabric width are often neglected. Especially when choosing equipment, some enterprises do not buy the equipment according to their actual production varieties. They think that the width equipment is high-grade products. Others have their own products. They do not know that their product structure does not need wide equipment. This will affect the increase of production water consumption, electricity consumption and steam consumption. Chen Liqiu said that dyeing and finishing enterprises should consider energy saving and emission reduction in addition to improving technology and improving production efficiency while carrying out technological transformation or expanding production and updating equipment. Specifically, the selection of dyeing and finishing equipment should follow the principles of pre treatment, high liquid feeding, low liquid finishing, high efficiency of washing, and the principle of applying small bath ratio to overflow machine.

Environmental chemicals are effective.

Energy saving and emission reduction, literally, is to achieve energy conservation and emission reduction. Specifically, reducing consumption means reducing the consumption of energy and dyes and auxiliaries. Generally speaking, there are two ways to achieve this goal. One is to reduce the technological process, shorten the process, and reduce the use of materials and energy. Two, various measures should be taken to increase the recovery of various energy sources and raw materials.

New auxiliaries Environmental chemicals This goal can be achieved. According to Bu Zhuqi, a new Mstar Technology Ltd of Jintang textile and light industry in Shanghai, bu Gong tea saponin is a new type of pretreatment agent with simple application and convenient operation. It can effectively replace all kinds of auxiliaries used in the traditional refining and bleaching process. Ordinary fabrics do not need to add caustic soda, hydrogen peroxide and other chemical auxiliaries. Special fabrics can obtain better whiteness and wool efficiency by increasing the amount of saponin. The additive is suitable for one-time pretreatment of refining, degreasing, impurity removing and bleaching of cotton, polyester and blended fabrics. The strength damage and weightlessness rate of the fabric are all smaller than those of traditional process. It uses safe, non APEO and other harmful chemical elements, not only can reduce the amount of wastewater discharge, and COD concentration can be reduced from original 1000PPM to 500PPM~600PPM, while saving water and electricity, it can also effectively reduce the labor intensity of workers.

Prospects for new technologies and new energy

Biochemical dyeing and finishing technology and solar energy system are now being used in some printing and dyeing enterprises. Yang Anxin, Zhejiang Asia Pacific wide dyeing and finishing Co., Ltd., said that the establishment of solar collector system, because clean solar energy instead of conventional coal and petroleum energy consumption, not only can reduce emissions of SO2, CO2 and other exhaust gases and pollutants, but also has achieved the effect of effective energy conservation and environmental protection. According to the calculation area of 3000 square meters, we can save more than 52800 tons of steam in 20 years. The most important thing is that the application of solar energy in production is more suitable for printing and dyeing enterprises. First, the energy consumption of printing and dyeing enterprises is mostly in hot water, and solar water heater heat collection is the most mature and widely applied field of solar energy utilization technology. Two, printing and dyeing enterprises generally occupy a larger area and are easy to resettlement solar energy collection system. Especially when new buildings are built, the integrated design of solar heating system and building is cheaper and the effect is better.

In addition, biochemical dyeing and finishing technology is also a new technology that can be commendable. The technology takes full account of the technical characteristics of biological and chemical products, and completes the textile dyeing and finishing process by adjusting the conditions of textile printing and dyeing, and under the joint action of enzymes and environmental chemicals. Because of the catalytic action of biological enzymes, the removal of impurities in textiles has been changed. The reaction system with the interaction of enzymes and chemicals has greatly improved the reaction speed and effect. Enterprises can not only get more satisfactory results than traditional chemistry, but also shorten processing time and improve processing efficiency. After more than one year's production practice, Shanghai Shanghai printing and dyeing Co., Ltd. has found that using this technology reduces the use time of 50%, saves electricity and steam 40%, and reduces water consumption by 50%. {page_break}

Strengthening management and reducing waste

The equipment is advanced and the technology is perfect. Without the strict management of production site and the resolute execution of waste reduction measures, its emission reduction effect will not be good. Although management is a systematic and complex project, it does not affect the enterprise's attention to it. Shanghai technical textiles and dyeing Co., Ltd., through technological transformation and process waste heat recovery, has achieved gratifying results in keeping the equipment warm in winter and reducing heat loss.

According to Pan Yuming, chairman of the company, investment in energy saving and emission reduction projects of 8 million 420 thousand yuan, the recovery period is 2.5 years, it can achieve direct coal saving 7062 tons, reduce coal consumption 27%, indirectly reduce the cost of 1 million 200 thousand yuan, and reduce sulfur dioxide emissions 20 tons throughout the year. From the rise and fall of the world's printing and dyeing industry, we can see that only two of the products with high pollution, high energy consumption and low added value can achieve industrial transfer or completely collapse. Those products with low energy consumption, low emission and high added value can maintain their youthful vitality for a long time.