Upgrading Of Sewage Discharge Standards For Textile Dyeing And Finishing Industry

Since January 1st this year, the existing

The direct discharge of chemical oxygen demand (COD) should be controlled at 80 mg / L.

This is from 2013 COD straight row standard to 100 mg / litre, textile dyeing and finishing industry sewage discharge threshold is raised again.

One side is artificial.

And other comprehensive cost increases led to profits decline year by year, on the other hand, the new environmental protection law and other environmental protection magic incantation is getting tighter and tighter. The textile industry, which has long been in the top three of the wastewater discharge volume, is faced with more difficult sewage disposal multiple-choice questions.

Water prices and environmental threshold double rise, the industry is facing the "water problem".

The elevator rose to the 13 floor, and there was a smell of incense.

Go out of the elevator and turn around, the koi play lotus, the river winding, the green plant drop, the waterfall curtain, the unique air garden is forgotten. This is the top professional fabric supplier in the world -- the top floor of the office building of the mutual Textiles Holdings Limited.

"The water in this garden is factory waste water reuse.

But if we do not save energy and reduce emissions, the 13 meeting rooms will not be able to enter people. Smoke coming from the windows will choke people to tears, "Wang Baosheng, Deputy Secretary General of the national textile industry technology support alliance, pointed to 12 chimneys on another roof of the park.

Textile printing and dyeing enterprises have stereotypes, and stereotypes exhaust is very pungent.

In 2011, the company launched the waste heat recovery and reuse project of the stereotype machine, which had over 99.75% dust and over 90% desulfurization. It could also recycle waste gas for heating air-conditioning water and ironing processes.

In order to let reporters feel the contrast, Wang Baosheng's on-site command turned off a recycling device. After a few seconds, thick white smoke poured out of the chimney, and the pungent smell was disgusting.

"In order to achieve the best results, we do not use the traditional water spray technology, because it can only remove large particles, and too much waste water, it is not cost-effective."

Wang Baosheng said, "the core environmental protection issue of textile dyeing and finishing industry is water recycling. Even if we do waste gas treatment, we must also consider water saving."

Water and wastewater treatment has always been a headache for the textile industry.

The textile industry is a well deserved industrial water user. Usually, 1 tons of textile and dyeing products will consume 100 to 200 tons of water. In recent years, China's water price has been on the rise. Taking Guangdong Shenzhen as an example, its industrial water price has risen 50% in the past 3 years.

The textile industry also has an amazing amount of waste water and pollution.

According to the environmental statistics in 2012, in the 41 industrial sectors surveyed, the textile industry wastewater emissions amount to 23.7 billion tons, ranking third, and the textile industry COD emission ranks fourth in the industrial sector.

As the water price rises year by year and the environmental standards continue to improve, the textile industry is encountering an increasingly tight "water hoop curse".

According to the "discharge standard for pollutants in textile dyeing and finishing industry", the indirect COD emission standard of printing and dyeing enterprises was 200 mg / litre in 2013, and the COD content of straight row environmental effluent increased to 100 mg / litre, but many enterprises still exceeded the standard discharge.

Take Zhejiang as an example, in the first quarter of 2013, the key pollution source monitoring report of Zhejiang province showed that 391 textile enterprises in the province exceeded the standard discharge, accounting for 92.4% of the total number of superenterprises.

Since this year, the national standard of textile wastewater discharge has been further improved, and the new "environmental protection law" has been escorted for the implementation of supervision.

"The textile industry has raised the standard of wastewater discharge. It seems that the bow has not been turned back."

Xi Dan Li, vice chairman of the China dyeing and printing industry association and professor of Donghua University, said that in recent years, the requirements for environmental protection are getting higher and higher, and law enforcement is becoming more and more stringent.

"The new environmental protection law gives enterprises no space to escape, especially in terms of water management, and enterprises can no longer be stingy."

The investment is huge, but we can make money by spending money.

Money is always a topic that enterprises can't do in environmental protection reform.

In the textile industry with an average profit margin of less than 5%, it is too shy to make environmental improvements, but it may not be possible because of the hard constraints of environmental protection.

"Printing and dyeing industry's environmental protection pformation is easy to say, but it is by no means a simple device, it can be completed by a partial pformation."

Zhang Shuming, deputy chief engineer of VR group Limited by Share Ltd, has visited the company and marveled at the systematic reuse of resources and energy treatment. "More importantly, there is a lot of investment in energy conservation and environmental protection, but now enterprises only focus on short-term benefits, and rarely focus on long-term goals."

Since its establishment in 1997, the investment of mutual textiles in environmental protection and energy saving has exceeded 60 million US dollars.

Such a scale of investment in environmental protection is very few in the textile industry. There is also a dispute about "burning money". But the performance of mutual textile in Hong Kong stock for 10% consecutive years is obvious to all.

"I invest money in order to save money, and I get all the heat in the trench.

Facts have proved that energy saving and emission reduction are well done, and the cost is lower.

Why can't you make money? "Yin Huilai, chairman of the board of mutual Textiles Holdings, counted out a few accounts.

The upgrading of low bath ratio dyeing technology has greatly improved the dyeing water ratio, and only 3 years have recovered the cost. The water consumption has been reduced by 50%, the steam consumption has been reduced by 50%, the auxiliary consumption has been reduced by 40%, and the source reduction has been achieved.

The pformation of the heating valve in printing and dyeing workshop is equivalent to wearing 3000 thermal insulation clothing for the valve. The investment of 220 thousand yuan is returned in 2 months, and it can save more than 2000 tons of standard coal in one year.

The sewage discharge heat and cold separation system and the heat waste heat recovery system can reuse the heat energy in the traditional waste water, recover the investment in 4 months, save 200 thousand yuan in the first year, and save 1 million 800 thousand yuan last year.

Build a sewage treatment plant and use membrane infiltration technology to reclaim the recycled water. The daily sewage treatment capacity is 40 thousand tons, and the COD direct discharge is only 40 mg / L to 50 mg / L, which is only half of the national standard. It can save 3 million to 6 million yuan a year, and can reduce COD400 tons per year.

After treatment, reclaimed water can also be used for 100% times.

"After the environmental protection pformation, the product quality is better, and the production efficiency can also be improved."

Yin Huilai said that the key part of dyeing and printing is dyeing, and the dyeing is not successful, and the water and materials are wasted. Moreover, the fabric is soaked in water for a long time, and the fabric is not good.

Through the upgrading and upgrading in recent years, compared with 2008, the coal consumption per unit product standard of enterprises decreased by 27.1%, the water consumption per unit product decreased by 59.4%, and the success rate of the product increased from 65% to 98%, the per capita output value increased by 109.9%, and the per capita profit and tax increased by 77.4%. In 2014,

"Energy saving and emission reduction do not lose money, but become the competitiveness of us to adapt to the new normal economy."

The harder the industry is, the more environmental investment will be needed.

Land is another threshold.

In the area of about 300 acres of textiles, from the beginning of the planning, sewage treatment facilities occupy the total plant area of nearly 1/3 of the land.

For many enterprises, the waste water preprocessing facilities occupy less than 10% of the average land occupied by the enterprises. If the indirect discharge of the enterprises reaches the standard, it will at least increase the land area by 30%.

"The mode of exchange is too hard to replicate.

Now the industry is a small profit, even technology upgrading is no money, let alone buy land for environmental protection pformation.

And

The production capacity is too concentrated, and the total amount of pollutant discharge in some areas exceeds the environmental affordability. Even if the enterprises have the will, it is unlikely that they will get the industrial land again.

The chief executive of a medium-sized printing and dyeing enterprise in Jiangsu admitted that dyeing and finishing enterprises need close water construction, and their capacity is almost concentrated in the eastern coastal areas. The land supply in these areas is very intense and there is limited room for expansion.

"In recent years, the textile industry has suffered from internal and external troubles, and the deficit has been expanding. Now, we have raised the threshold of environmental protection.

The scale of enterprises is different, so energy conservation and environmental protection are not the only way for Huashan.

"Big businesses can do big things. Small businesses can do small things. Can not change the taps?"

The key is not whether you can do it or whether you want to do it. "

Zhang Sifang, manager of enterprise management department of Wei Qiao venture group, said.

In the small and medium sized printing and dyeing enterprises gathered in Shaoxing, the centralized pretreatment mode of printing and dyeing wastewater has also been concerned in the past few years.

This kind of sewage is pported to the sewage treatment plant in the industrial park, and the centralized discharge mode has obvious advantages and disadvantages.

It is estimated that if an enterprise builds sewage treatment facilities alone, in order to achieve indirect emission standards, the average enterprise will still need to invest 20 million yuan, and the total investment will exceed 5 billion yuan.

The method of centralized preprocessing is only about 700 million yuan, which is about 1/7 of the former and covers only 1/6 of the enterprises themselves.

However, this mode weakens the environmental constraints on enterprises. Once the supervision is not strict, it will lead to the mutual wrangling between enterprises and sewage plants, so that centralized emissions can be turned into centralized pollution.

In the view of Zhao Qizhi, deputy general manager of mutual dyeing and printing, the enterprises should not rely on the third party's vicarious liability or the government to reduce the regulatory standards, and the stricter the environmental standards, the better the industry.

"Environmental restraint is an important part of the market challenge. If enterprises fail to do so, they should be eliminated, so that we can rely on the strength of the market to eliminate excess capacity and increase industrial concentration."

"The more difficult the industry is, the more environmental investment is needed, because customers and the market will value your quality more.

Especially in the past one or two years, environmental protection requirements are high. Ecological construction itself is to enhance competitiveness. In the long run, it will also help reduce production costs. "

Zhang Shuming said, "emissions have become hard targets, and you can't do anything, especially under the new normal economic environment. The cost of environmental offences is also unacceptable to enterprises, and enterprises should not be lucky again."