[Focus] Technology, Support And Highlights: Printing And Dyeing Zero Emission Promotion Is Imminent And Must Be Arranged!

A kind of

In recent months, many textile enterprises along the Yangtze River Valley have continuously heard news of shutting down, stopping production and limiting production.

China is a big textile manufacturing country in the world. From the perspective of the entire textile and apparel industry chain, the printing and dyeing industry is an indispensable industry chain with high technology content.

Li Jincai, executive director of the China Textile Planning Research Association, Feng Dehu, executive vice president Yu Yizheng told reporters that organizing the implementation of the zero emission project of textile printing and dyeing is one of the key contents of the China Textile Planning Research Association's 2018 year industry development prospective project research and extension plan.

A kind of

How to break the bottleneck of pollution?

Zero emission technical conditions have been met.

At present, the zero discharge technology of printing and dyeing wastewater has been studied both at home and abroad, and some achievements have also been made.

From the perspective of processing technology, there are some successful examples.

But in the end, it can not be widely applied because of the problems of high operating cost, large retrofit cost, and adjustment of technological parameters.

According to the survey of the textile planning and Research Association, the current situation of domestic printing and dyeing wastewater treatment is roughly 3-4 yuan per ton in the enterprise, and 4-5 yuan per ton in the centralized treatment of the park (further reaching the standard), and the water resources fee is generally 10 yuan / ton water.

For printing and dyeing wastewater zero discharge, the current processing cost is usually around 20 yuan / tonnes of waste water.

Because of the high operating costs, the general printing and dyeing enterprises are more difficult to accept.

Feng Dehu said that as a professional association to study and promote the development of the industry,

The planning research society is duty bound to start from the actual situation to solve this problem effectively, and remove this big stone that hinders the development of the industry.

Therefore, on the basis of extensive research, with the support of Donghua University, Tsinghua University and the environmental protection listed companies, the research institute put forward the idea of "internal and external guidance", namely, in the industry, we should intensify the organization of R & D to overcome the zero emission core technology problems, and carry out the collection, introduction or grafting of zero emission related technologies outside the industry (mainly for environmental protection listed companies).

Through strict screening and demonstration, and organizing relevant units to carry out pilot tests and productive operation tests, pilot projects will be constructed.

Ecological and environmental protection has been included in the key development of our country. The zero discharge of printing and dyeing industry will completely solve the environmental problems of the textile industry, and at the same time, it is also a great opportunity for the economy.

The printing and dyeing industry is the most promising and best possible zero emission industry.

From the concept, we should further promote and popularize the technology of turbidity and turbidity diversion, and utilize the catalytic oxidation technology of rare metal to treat 10% concentrated wastewater, so as to achieve a great increase in the reuse rate and efficiency of wastewater under the premise of low retrofit investment and low operation cost.

Yu Yizheng told reporters: from the current application of the project, we have solved some key technologies of printing and dyeing wastewater zero discharge more accurately, and achieved the original zero emission technology project. We can practically promote the application target: raise the efficiency of wastewater treatment greatly and raise the wastewater reuse rate (generally up to 70-96%) under the condition of low operating cost and low investment and pformation costs.

The comprehensive treatment cost is generally not higher than the existing 10 yuan / ton water.

In view of this, we believe that the textile industry's promotion and promotion of printing and dyeing zero discharge technology conditions basically meet, and the promotion and application of this application technology in the whole industry are promising and promising.

Preliminary calculation of economic and social benefits of zero discharge in printing and dyeing industry

The minimum discharge amount of printing and dyeing wastewater in China is 16 million tons, equivalent to 4 million 850 thousand tons per day.

Suppose that the whole industry only needs to complete the 10% enterprise zero emission technology pformation, and other reforms according to the environmental protection requirements (with 50% calculation of zero emissions).

That is 480 thousand tons.

With a set of zero emission investment of 7 million for 3000t/d, the total investment of the project is 1 billion 100 million, and the retrofit cost is 5 billion 100 million, plus 6 billion 200 million.

This is only part of the waste water.

At the same time, sludge and waste gas were reused and reused at a rough estimate of 20-30% to pform the cost to a total of 80-90 billion yuan.

The total pformation will be 800-900 billion yuan!

The resulting environmental benefits are enormous, and the average COD1500mg/l is calculated by the pformation 10%. The average standard COD is 80mg/l 80mg/l. The daily emission reduction capacity is 480 thousand tons, and the annual emission reduction wastewater is 1.6 million tons (excluding the pformation part). The emission reduction is COD720 tons per day, and the annual emission reduction of COD reaches 23700 tons.

The total pformation is calculated at 16 million tons. The daily emission of waste water is 4 million 800 thousand tons. The annual emission reduction is 16 million tons. The annual emission reduction is COD7200 tons, and the annual emission reduction of COD reaches 2592000 tons. It will play a good role in improving the quality of the surface water in China.

Without increasing or increasing the operation cost of the treatment, the printing and dyeing wastewater can be effectively discharged and the wastewater reuse can exceed 70-96% and ecological treatment.

Conditions permit to achieve zero emissions.

Ecological and environmental protection has been developed for example in China. In the 41 industries, printing and dyeing industry is the most important industry. Zero emissions from printing and dyeing industry will completely solve the environmental problems of the textile industry, and at the same time, it is also a great opportunity for the economy.

Technology is interlinked. In printing and dyeing industry, zero discharge can be carried out at the same time, and other industries can carry out zero discharge research on waste water. The significance will be even more significant.

How can we promote environmental protection?

Special funds are guaranteed.

In August 3rd this year, the joint meeting of textile and environmental development special fund organized by the China Textile Planning Research Association and the China Textile Federation Development Department jointly organized a joint meeting system for textile and environmental development special fund to help organize and carry out related work, guide and regulate related management.

The main functions are as follows: first, we can pool our minds and prepare for the launch.

Environmental protection special fund to prepare.

The two is to solve the problems of fund preparation and scheduling in the process of preparation and registration of special funds.

The three is to give full play to the professional characteristics and experience of various professional fields such as capital, finance, textile, environmental protection, scientific research and other fields, and strengthen the communication, negotiation, coordination and coordination of all sides. Further study will be made to better play the role of special funds in promoting the application and popularization of key environmental protection projects in the textile industry, and enhance the professional service level.

The four is to explore and try to speed up the integration of industry and finance in textile industry. We should accumulate experience and explore effective ways and means together.

The organization launched the special fund for textile and environmental protection development is the key exploratory task set by the textile Planning Research Association early this year.

Last year, the textile Planning Research Institute re adjusted its positioning according to the needs of the industry development, and organized the research and application of the leading projects such as the textile industry's industrial economy, industrial technology, industrial finance, production and urban integration, and the exploration of related research areas as a key task.

In the past two years, the textile planning and Research Association has studied the textile capital market and launched the textile industry in depth according to the industry development needs and market demand.

The experience gained from the consulting service of the listed companies and the experience gained from the organization of the relevant units in the industry for the forward-looking project research and the promotion and promotion of the leading technological achievements are laid down.

And in March this year, China Textile Federation drafted the "three years plan of integration of industry and finance in the textile industry".

Both the internal and external conditions for organizing the preparation and launching the special fund for textile environmental protection development are relatively satisfactory.

Therefore, the China Textile Research Association and the China Textile Federation industry development department work closely together to work together to promote the development of industry and finance cooperation mode - Textile and environmental development special fund.

From the perspective of industry development, Feng Dehu analysis shows that excellent and mature technology projects and scientific and technological achievements can not be separated from capital and capital support in the process of popularization and application.

It is also very realistic and urgent to promote the popularization of textile printing and dyeing zero emission projects.

Therefore, using the service platform of the research society, we have widely discussed with some domestic capital, securities firms, funds and investment institutions of listed companies, and of course, we have also demonstrated the capital aspects of the projects.

Finally, he is willing to work together and try to organize and initiate the textile and environmental protection development fund through the organization to provide substantial financial support and capital guarantee for the application and promotion of zero emission projects.

"There are many effective ways and means to explore the textile industry cooperation, but the key needs to be worked out in the actual operation process, and it can solve some problems effectively."

Feng Dehu pointed out: as an industry development fund, the special fund must be guided by the China Textile Industry Federation in management and must be professionally managed in business.

After the establishment of the fund, we should further coordinate and coordinate with the professional associations such as printing and dyeing, environment, etc. under the guidance and coordination of China Textile Union.

For example, based on the current cooperation with the Development Department of the China Textile Industry Association, it is necessary to further cooperate with the professional associations of China Environmental Protection Association, printing and dyeing Association, Federation of Environmental Protection Committee, China Textile Engineering Society, environmental Specialized Committee and other professional organizations to organize project demonstration, promotion and promotion of technological achievements.

The textile and environmental development special fund will mainly support the popularization and application of zero emission projects in textile industry, including some other textile and environmental protection projects, such as green environmental protection projects in the park.

For areas where textile processing enterprises are relatively concentrated, the textile Planning Research Association will also actively introduce local government's guidance funds, or cooperate with the local government's supporting development fund, and set up a special sub fund for textile environmental development services in specific areas, so as to serve local green environmental protection and economic development.

A kind of

Technical highlights have advantages.

The zero discharge technology of textile printing and dyeing is a series of technology developed by Professor Xi Dan li of Donghua University after thirteen years of continuous innovation research and development and continuous improvement and improvement through engineering practice.

At present, many pilot projects have been completed and pilot tests have been carried out, and a pilot demonstration base for zero emission projects has been set up.

It can greatly improve the efficiency of wastewater treatment and improve the reuse rate of wastewater under the condition of low operating cost and low investment, and effectively solve the problem that the wastewater produced by printing and dyeing enterprises is difficult to deal with effectively.

At present, the project has entered the stage of practical application and popularization.

The key technologies of zero emission projects include: "rare metal catalytic oxidation technology", "nanorods aeration technology", "high efficiency oil and water separation technology", and "accelerator", "nano filter", "printing and dyeing sludge ecological utilization", "mixed salt purification" treatment technology, mainly including 5 innovative core technologies, more than 10 invention patents technology and modular technology integration. Most of the key elements of the system have been standardized and modularized so as to facilitate practical engineering applications.

According to the actual situation of textile printing and dyeing enterprises (cotton, wool, hemp, chemical fiber and other professional fields, dyestuff and dyeing process, etc.), the system combination of various modules can be carried out.

From engineering test and practical application, most printing and dyeing enterprises can implement one or more combinations according to the actual situation of the project, so that the pollution of China's printing and dyeing industry will be greatly reduced and the "polluting key industries" hat can be removed.

Characteristics and advantages of zero discharge technology for printing and dyeing wastewater treatment:

(1) save resources: the area is about 50%-60% of traditional method, saving a lot of land and possibly 87-75% industrial water.

For less water and less water area, it has more special significance.

It will completely solve the environmental problems caused by dyeing and printing wastewater treatment.

Economic, social and political benefits are relatively large.

(2) investment in engineering pformation is low, and the whole set of investment in technology and equipment is small.

And the operation cost is low, only 8-10 yuan / ton.

Because of the modular integration technology system, it is also suitable for the old plant's technical pformation.

From the economic accounting analysis: the operation cost accounting of tonnes of sewage and sludge treatment is even lower than the current treatment cost.

After deducting the cost of reusing water, the actual cost is 7-8 yuan / ton, slightly lower than the traditional treatment cost, and the economic and environmental benefits are relatively high.

(3) implementation of ecological printing and dyeing technology benefit estimation: output value is about 80-90 billion yuan.

The environmental benefits are enormous: if the amount of waste water is reduced by 480 thousand tons per day, 1.6 hundred million tons of waste water will be discharged every year (excluding reconstruction), and COD emissions will be reduced by about 720 tons per day, and the annual emission reduction of COD will be about 23700 tons.

(4) stable operation, simple operation and management.

The sedimentation and dewatering effect of the sludge is good and no odor is produced.

Among them, "mixed rare metal catalytic oxidation technology" and "nano aeration rod technology" are the core of the zero discharge technology of textile printing and dyeing wastewater.

(1) catalytic oxidation technology for mixed rare metals

The catalyst prepared by compounding multiple metals and rare earth metals has the characteristics of strong catalytic oxidation ability and wide use conditions.

According to the actual processing requirements and effects, the technology can set process parameters to control the degree of catalysis, oxidation and flocculation.

(2) nano aerated rod technology

The effective aeration rods of special aerator rods are distributed at 200nm-300nm and are foggy when aerated.

It is necessary to regulate the parameters such as wind pressure, air volume and time to achieve the specific processing requirements.

The mechanism of nano type aeration rods is mainly to pport large amounts of air to the wastewater under certain pressure through nano sized micropores, and to dissolve the oxygen in the air into the water, thus enhancing the biochemical treatment effect.

In addition, a large number of microbubbles can be produced in the waste water through the nano micro pore oxygen pportation, and the turbulent stratification will form, so that the particles in the floc and dissolved state will be destabilized and the separation of water and pollutants will be realized.

The zero discharge series technology also includes five key technology combination technologies: the establishment of the clean and turbidity system, the independent treatment process of concentrated / weak waste water, the 70-92% water reuse technology, the microfiltration nanofiltration reverse osmosis three stage membrane separation MBR technology, the MVR low temperature evaporator, etc.

Basic road map of technology and technology:

The practical application of zero emission projects has been completed.

(1) 300t/d demonstration project renovation project, Jiangsu Fenghua textile finishing technology Co., Ltd., has been running normally for 2 years.

In addition to the Federation of textile industry, Ministry of environmental protection, printing and dyeing enterprises, tertiary institutions and the news media, representatives of Kenven, ZDHC, director of the chemicals department of the United Nations Environmental Protection Agency, and Frank, as well as some relevant international organizations such as WWF, Puma, H M M, Adidas and so on, were invited to participate.

(2) Shandong Ruyi group belongs to Ruyi digital printing and dyeing Co., Ltd.

The project is implemented in 4 stages. The key 400 tons / day printing wastewater zero discharge, 500 tons / day waste water recycling and zero discharge project and 3500 tons / day waste water reuse project have been completed.

In addition, the local salt water treatment project is under construction because of the high salinity water quality in saline alkali soil.

(3) Shaoxing Hai Shen printing and dyeing Co., Ltd. has completed the pilot test and the industrial operation test of printing waste water, zero discharge of the boiling water and concentrated waste water.

Construction of 600 tons / day printing wastewater zero discharge project has been put into use.

The textile Planning Research Institute completed three platforms last year, and is currently playing an active role.

The meeting of the secretaries of the listed companies is also planned to be held at the end of this month. At that time, the operation and development of the 2017 textile listed companies will be released and interpreted, as well as the ranking of all kinds of textile and apparel listed companies.