In 2019, How Did Guangdong Shantou Textile And Dyeing Enterprises Survive This?

In July 16th, the Environmental Protection Bureau of Chaoyang District of Shantou issued a notice.

In order to speed up the comprehensive renovation of the Yangtze River, according to the decision and deployment of the municipal government, the district government decided to shut down the printing and dyeing enterprises from January 1, 2019 until the printing and dyeing enterprises gathered in the park and concentrate on pollution control. The enterprises concerned should make sure that according to the actual situation, before the end of August 2018, the printing and dyeing, printing and washing enterprises in the basin will cut more than 50% of the total amount of pollutants approved by the state pollutant discharge permit and a comprehensive shutdown plan from January 1, 2019. The work plan should include the current demand of the enterprises concerned, prepare for the reduction of more than 50% of the total pollutant discharge before the end of August 2018, and implement the measures and implementation steps of shutting down before January 1, 2019, and the problems that need to be solved after shutting down.

The origin of this notice is directly related to the inspection results of the first round of environmental inspectors' rectification.

Since May 30th, the 6 inspectors of the first batch of central environmental protection inspectors have been inspecting the 10 provinces (districts) of Hebei, Inner Mongolia, Heilongjiang, Jiangsu, Jiangxi, Henan, Guangdong, Guangxi, Yunnan, Ningxia and so on.

In June 15th, the central fifth environmental Inspectorate team inspecting the pollution control situation of the Lianjiang River Basin found that the progress of key projects in the practice of rectification of river pollution was seriously lagged behind. The water pollution of Lianjiang and its tributaries is still serious.

Lian Jiang is the mother river in eastern Guangdong. It has been named because of its clear water and winding practice.

Now, this river has become a "black dragon". It has been identified as "the most polluted river in the whole province" by the Guangdong provincial Environmental Protection Agency.

In April 2017, the Central Environmental Protection Inspectorate of fourth pointed out: "Shantou has long been relying on thought and training plan for river management."

Today, after a year or more, the phenomenon of black and smelly rivers has hardly changed.

What causes the stagnation of harnessing the Yangtze River?

It is understood that lianjiang natural water shortage, lack of self purification capacity, the ecological environment is quite fragile.

However, over 20 years' practice of river pollution is not a natural disaster, but closely related to the local industrial structure.

Shantou is one of the four major underwear bases in China. Textile and garment industry is a pillar industry in the region. Various kinds of clothing advertisements are seen everywhere in the streets and streets, and a large amount of waste water produced by printing and dyeing enterprises is one of the important sources of pollution.

It is understood that there are thousands of printing and dyeing enterprises in the Lianjiang River Basin. After several rounds of shutdown and renovation, there are still more than 200.

More than half of the Chaoyang district and Chaonan District of Shantou accounted for more than half of the 183 enterprises.

At present, illegal printing and dyeing enterprises along the Lianjiang River still have serious pollution problems.

In an interview with Xinhua news agency, Chen Xiaopeng, deputy director of the environmental monitoring bureau of the Guangdong provincial Environmental Protection Bureau, said that the ring Inspection Bureau conducted cross law enforcement inspection in the first quarter of the Lianjiang River Basin, and checked 29 enterprises. 21 of them had excessive discharge of waste water, and 1 privately operated underground pipes directly discharged the printing and dyeing wastewater.

In addition to some enterprises stall chronic diseases, the pace of environmental protection facilities construction in Shantou is also slow.

The central fifth Environmental Protection Inspectorate General reported that Shantou was not aware of the importance and seriousness of pollution control in Lianjiang River.

In particular, the party committees and governments at all levels in Shantou have turned a blind eye to the pollution problem of the river training and dragged on the work of pollution control.

According to the report of Shantou, since 2014, Shantou's municipal financial investment has only been 158 million yuan for training the river.

Especially after the feedback from the central environmental protection inspector in 2017, the Shantou Municipal Finance Bureau invested only 6 million yuan in the training of the Yangtze River.

The survey shows that the construction of industrial agglomeration parks and environmental protection facilities in Shantou is far behind the established planning.

As early as 2015, Guangdong province formulated the "comprehensive improvement plan for water environment in Lianjiang River Basin", and put forward the target of "black and foul smell" in 2020, "water restoration of agricultural water and landscape water function".

In accordance with the remediation plan, it is the most important move to promote the centralized pollution control of textile and dyeing enterprises in Lianjiang River Basin. It requires the industrial park to be put into operation at the end of 2017, and more than 50% printing and dyeing enterprises will complete the upgrading and upgrading.

But the work is slow.

In May of this year, the industrial park was still under construction in Chaonan District, where the fastest progress was implemented. In the slowest Chaoyang District, it was considered that the location of the former plan was not suitable, and remained in the demonstration stage and the preliminary stage.

Why is Shantou's printing and dyeing enterprises moving so slowly?

"This is because the distribution of printing and dyeing enterprises is scattered, some enterprises are more convenient to move, but some enterprises are relatively difficult, because the plan is to require the overall relocation, so it is very difficult to unify."

A person responsible for printing and dyeing enterprises in Guangdong revealed his speculation to reporters.

In addition, according to the Xinhua news agency, another reason for the delay is that there is no large area of land suitable for printing and dyeing parks. There is a "near neighbor avoidance effect".

However, as Ceng Fantang, a researcher at the Southern China Institute of Environmental Sciences, who has long been involved in the practice of pollution control in the Yangtze River, said: "there are so many" arrears "in the practice of river pollution. We must have major operations.

According to the data provided by China printing and dyeing industry association, at present, 25.54% of the printing and dyeing enterprises in China are discharged into the industrial wastewater centralized treatment plant, and 30.94% of the printing and dyeing enterprises wastewater is discharged into the municipal sewage treatment plant.

"Textile dyeing and finishing wastewater has the characteristics of large amount of water, poor biodegradability, high chemical and inorganic salts content, which has a certain impact on urban sewage treatment plants.

For such enterprises, a certain period of time should be granted to move to industrial parks.

Lin Lin, Secretary General of China printing and dyeing industry association, said.

From any point of view, it is imperative for Shantou to intensify efforts to clean up the printing and dyeing enterprises.

In June 27th, the Shantou Public Security Bureau and the municipal and district level two environmental protection departments conducted a surprise inspection. In the two town of Chaonan District, a printing and water soluble factory was still in violation of the law.

Law enforcement officers seized 2 printing machines, 23 printing beds, 1 sets of boilers, and a number of dryer, cylinder centrifuges, water soluble pots and other equipment and raw materials.

Is there a win-win way?

With the acceleration of China's industrialization process and the rapid development of the economy, environmental problems are becoming increasingly prominent.

Is the development of enterprises necessarily inconsistent with environmental protection? Obviously, this is not the case.

How to achieve win-win development between enterprise development and environmental protection is a topic that can not be carried away.

In recent years, a large number of basic researches on the application of new technologies for printing and dyeing wastewater treatment have been carried out at home and abroad.

From a technical point of view, these high-end technologies can completely solve the problem of COD removal in printing and dyeing wastewater, but in reality, most printing and dyeing enterprises have the characteristics of "small profits, small profits but quick turnover". The application of high-end technology will inevitably bring about investment and operation cost increase, and the printing and dyeing enterprises with low profit margins are difficult to adapt.

Mao Zhiping, Professor of chemistry and chemical engineering, Donghua University, studied the typical pollutants from 27 printing and dyeing enterprises in recent years.

Among them, 74% of the enterprises adopt the three level processing technology which combines biochemistry and physicochemical, but only 22% of the enterprises with final water reuse rate of more than 50%.

"It can be seen that the awareness of environmental protection in most printing and dyeing enterprises has been gradually strengthened. However, from the monitoring results of printing and dyeing wastewater, the antimony, nickel and trimethylamine compounds in printing and dyeing wastewater are still exceeding the standard, and ammonia nitrogen and total nitrogen are also far exceeding the national limit standards.

In addition, although the state has not issued corresponding standards, the content of inorganic salts in wastewater is relatively high, which should cause enterprises' concern. "

He believed that printing and dyeing enterprises should pay attention to the technology of pollutant terminal treatment as well as the issue of cleaner production.

Mao Zhiping analysis thinks that the future development direction of clean production technology is the key technology of ammonia nitrogen reduction, total salt reduction technology and printed nickel net substitute technology.

He further explained: "clean production technology can reduce the amount of wastewater treatment, and then reduce the cost of investment and operation of the wastewater treatment.

Reducing the salinity and chroma of wastewater can reduce the difficulty of wastewater treatment.

Improving the quality of the recovered alkali can improve the qualified rate of the products and enhance the efficiency of the enterprises.

"Ecology, fashion, comfort, health and energy saving and environmental protection are the general trend of the development of the printing and dyeing industry in the future.

To ensure profits and pursue green, printing and dyeing enterprises are looking for balance.

Zhang Huaidong, Deputy Secretary General of the China printing and dyeing industry association, told reporters that the printing and dyeing industry has a lot of subdivision areas and can not be generalized, but the printing and dyeing enterprises' parks are undoubtedly an effective path.

"At present, Zhejiang, Jiangsu, Guangdong and other places have put forward the requirements for printing and dyeing enterprises to enter the park.

Compared with the separate treatment of wastewater, the comprehensive treatment of printing and dyeing wastewater has greater advantages in terms of investment and operation cost, and is convenient for environmental supervision.

Zhang Huaidong told reporters that in recent years, he has gone to various printing and dyeing clusters for many times, and the implementation in different places is quite different.

"The implementation of environmental protection in some areas is really not satisfactory. The factory buildings are dirty and dirty, and the sewage is overflowing, which has lowered the" value "of the entire printing and dyeing industry, and it is imperative to renovate it.

But at the same time, the printing and dyeing cluster in Zhejiang, Shaoxing, Keqiao and other places is in good condition, and the input in environmental protection is commendable. It has formed an integrated atmosphere of energy saving and environmental protection.

It is reported that the first quarter of this year, Shaoxing Keqiao coastal dyeing and printing area business profit growth of over 10%, new product profit growth of 57.6%.

Zhang Huaidong also said that environmental protection should be practical and realistic: "the purpose of environmental remediation is to control the environment, and to shut down and harness enterprises that cause serious pollution."

But we are afraid that action will be "bad". No matter whether the enterprise is polluted or not, it will be shut down.

He stressed: "the situation of" one size fits all "can not be repeated, and environmental protection law enforcement should be targeted, so that environmental protection is powerful and can serve the hearts of the people.

Recently, at the 2018 annual meeting of Heng Tian Lixin, the national printing and dyeing industry environmental protection conference, we heard many energy efficiency experience and technological achievements shared by the energy efficiency leader representatives, hoping to share with the printing and dyeing enterprises.

Zhang Guoqing, vice chairman of happy home textile Co., Ltd.: wastewater utilization, stable emission reduction

Every day, a large number of waste hot water is discharged into the sewage treatment system in the printing and dyeing workshop, causing the sewage temperature to rise, which seriously affects the quality of anaerobic process and sewage treatment.

The cooling water of alkali recovery directly drained to the original pool. In summer, it not only caused the increase of water supply temperature, but also affected the dyeing and finishing workshop process. Moreover, the recycling effect was not ideal. Now the cooling tower was temporarily used to cool down, resulting in a large amount of heat energy wasted.

To solve this problem, the company adopts the mode of lithium bromide heat pump, high efficiency plate heat exchanger series and parallel, and gradually warming up, and adopts different recycling modes for different water quality, heating and heating fresh water by recycling preheating, and applying it to the production process. It not only saves steam heat loss, reduces production cost, balances production water, but also stabilizes sewage treatment process.

In addition, the company also adopts the closed condensate recovery technology scheme, which directly reclaims the condensate of the drying cylinder to the high quality water stage in the production process, not only reducing the process of water treatment, avoiding waste heat and water, but also reducing environmental pollution.

The waste heat recovery and utilization system of dyeing and finishing workshop can be saved by 40 thousand tons / year and 7 million 800 thousand yuan per year for the company.

With the continuous development of the company and technological progress, we will further strengthen the various energy remediation and comprehensive utilization, making the energy cost lower and more reasonable, helping to achieve the sustainable development of enterprises.

Printing and dyeing plant is a high energy consuming enterprise. Under the situation of increasingly short energy and increasingly serious environmental protection, it is an inevitable trend for enterprises to make effective use of resources and to improve energy conservation and emission reduction.

Xiang Jingguo, an engineer of Zhejiang Fu run Co., Ltd.: upgrade the system to reuse water.

The company has always advocated water-saving and emission reduction work, starting from various channels such as technology and equipment, seizing the source, paying attention to every link in the production process, and creating good social and economic benefits for enterprises through water-saving technology pformation.

The company first upgraded the water softening system.

The original water softening system directly flushed water into the sewer, which wasted resources and increased drainage.

Therefore, the company collects the water softening and flushing separately, underneath the deep pool of 50 cubic meters, and uses the automatic floating ball control pump to connect the pipe to the place where there is no need of water. The daily water saving is about 100 tons. According to the annual normal production 350 days, the water can be saved 35 thousand tons / year.

In addition, the company upgraded and upgraded its technological processes in various processes to reduce water consumption.

For example, add 10 air stream dyeing machines in the dyeing workshop, and eliminate the ordinary high temperature dyeing agent with high energy consumption and high water consumption. The original bath is 1:8, and the bath ratio is 1:4 after upgrading the equipment, which can save water 100 thousand tons / year.

In addition, the printing plant of the company upgraded the water washing machine with large water consumption and increased the cold rolling time. At the same time, the insulation was made, which ensured that the slurry of the cloth was squeezed clean and ensured the high temperature rinse time. It not only increased the output benefit, but also saved 52 thousand and 500 tons of water.

In addition, the company also used tie dye drying cylinder steam condensate recovery, reclaimed water will use system technical pformation and so on. Now enterprise water reuse rate reaches 46.2%, process water reuse rate 100%, 10000 yuan output value increased by 7.5%.

Zhu Donglan, director of dyeing and printing office of Sheng Hong Group Co., Ltd.: clean energy is controllable accurately.

Coal energy has brought glory to the industry, but it is also a serious environmental pollution.

With the continuous emergence of fog and haze, searching for clean energy to ban coal combustion has become an important task in the global energy industry.

Instead of coal, energy is mainly natural gas and biomass, but the unit calorific value and utilization rate of natural gas are much higher than that of biomass. Moreover, natural gas has no toxicity and combustion heat efficiency, and it does not need to store equipment and facilities through pipeline pportation. Therefore, replacing natural gas with coal is the best choice.

The Sheng Hong Group dismantled the heat conduction tubing inside the molding machine, and installed the combustion chamber, so that the hot air can fully circulate the convection, so as to ensure the indoor temperature balance and the controllable rate of heating up.

Install burner and burner control system, so that operation can be completed on a unified platform.

Compared with the heating of the coal-fired boiler before pformation, the technology does not need to use heat conduction oil as the heat medium to carry out the two heating pformation, and the heat generated directly heating the circulating air. The circulating air temperature controls the size of the combustion flame, and the control accuracy reaches 1 C, so that the energy utilization rate reaches the best condition.

At the same time, because the pipeline is directly pported to the stereotype machine through the pipeline, it can be used on demand, the load is stable, unnecessary waste is avoided, and the use of energy is reduced.

With the development trend of national environmental protection policy, energy policy and the gradual improvement of natural gas supply conditions, the promotion of natural gas heating direct ignition technology is an inevitable trend. Sheng Hong Group will shoulder more social responsibilities, take the initiative to achieve innovation breakthrough on the basis of technology, provide reference for air pollution control in printing and dyeing industry, and vigorously promote energy saving and emission reduction technologies.

Hebei Ningbo Group Engineer Guo Xiujuan: enzyme oxygen technology to reduce energy consumption

At present, hemp and its blended fabrics are treated by conventional desizing, scouring, and bleaching with chlorine and oxygen.

However, because the process is not clean, it can reduce the whiteness and wool effect of the fabric. After dyeing and finishing, it is necessary to use the "chlorine bleaching" process prohibited by the state to remove the residual hemp from the cloth.

This process has a long process and low efficiency, and the consumption of water, steam, electricity and other caustic soda and other related chemicals is high, which greatly increases the production cost and the COD value of industrial waste water. In particular, the use of sodium hypochlorite in the process of chlorine bleaching not only aggravates the damage to the ecological environment caused by AOX (adsorbable halides) in the waste water, but also directly damages the health of operators, and increases the operation cost of sewage treatment.

In order to solve the above technical problems, Ningbo Textile adopts the technical plan: first, using the characteristics of high efficiency, specificity and mild processing conditions of KDH scouring enzyme, it can reduce some impurities and common organisms on the hemp fiber under suitable conditions, destroy the complete structure of impurities and common organisms on the hemp fiber, and provide more space for the action of chemical agents.

Secondly, hydrogen peroxide and auxiliary chemicals are used to remove residual impurities and common organisms on the hemp fiber under suitable conditions.

Due to the short technological process and short treatment time of high temperature in the technical scheme, instead of the caustic soda which is widely used in the conventional process, the multi-functional chemical agent with low alkali content is used to reduce the energy consumption, water consumption and the COD and AOX values of the industrial waste water in the pre-treatment process. At the same time, the sewage treatment cost is reduced, and the comprehensive processing cost is reduced by about 40%.