The business club reported on April 18 that Danyang Textile Co., Ltd. of Danyang City, Jiangsu Province, located in the Taihu Lake Basin, is a combed wool textile company with 16,000 spindles, set dyeing, spinning, weaving, and dyeing and finishing equipment. At the same time, it is also the first of a large number of printing and dyeing enterprises in Jiangsu Province to achieve 100% water reuse, and to achieve wastewater "zero emissions".
As a textile printing and dyeing sewage company, how to achieve "zero emission" of waste water, and to achieve energy conservation and emission reduction synchronization with the sustainable development of enterprises?
Xu Rongliang, chairman of Jiangsu Danmao Textile Co., Ltd., gave such an answer: As a polluting enterprise, only by planning ahead, making advances, and gaining initiative in environmental protection can it increase the staying power for the sustainable development of the company.
Energy-saving and emission-reduction became a top priority and went into the production workshop of the company. The reporter discovered a machine with a very different form and the production workshop was occupied by these machines. In fact, in recent years, Danmao Textile Company has continued to carry out technological transformation and has introduced 230 sets of spinning, weaving and finishing equipment with international advanced level from Italy, Germany, Belgium, Switzerland and Japan, so that the coverage rate of imported equipment reaches 80. %the above.
When going to the dyeing and finishing equipment, the person in charge of the company introduced to reporters. Recently, in order to save energy, the company converted the high-temperature and high-pressure dyeing cylinders into large-capacity dyeing cylinders. With the capacity unchanged, the company transformed the dyeing tanks into original ones. Only up to 100 kilograms of tops dyeing cylinders can now dye 200 kilograms. Although the reconstruction cost is nearly 2 million yuan, about 350 tons of standard coal can be saved annually.
In addition, Danmao Textile Company also invested more than 2 million yuan in the dyeing and dyeing workshop to introduce imported small baths than dyeing vats. After the introduction, the bath ratio was 1:3.5, and domestic vats with a bath ratio of 1:10 were eliminated, which reduced energy consumption. Increased production.
Danmao Textile Company found in the production that the high-temperature process water remaining after dyeing the fabric has high heat energy and can be reused. To this end, the company has invested 100,000 yuan to install thermal energy recovery devices in the strip dyeing equipment, so that the original water temperature is increased by about 10°C, and waste heat resources such as high-temperature process water are recycled.
At the same time, Danmao Textile Company also invested 300,000 yuan to install a heat recovery device in the boiler room, so that the waste heat generated by the oil boiler is converted into steam for reuse, and about 200 tons of steam can be generated per month.
Recently, the highlight of Danmao Textile's transformation project is frequency conversion. According to reports, the company invested 1 million yuan in air-conditioning fans, boilers, spinning machines, air compressors and other frequency control. Because the original high-power motor has no frequency conversion, through this frequency conversion transformation, and according to the actual needs of timely adjustment of operating conditions, can save about 15%.
How to become the first Danyang emission standard?
The reporter learned from the interview that Jiangsu Danmao Textile Co., Ltd. built a printing and dyeing wastewater treatment station at the initial stage of the construction of the plant to process the sewage generated by the dyeing of wool textiles. However, due to the sloppy equipment, backward technology, and low efficiency of the sewage treatment station, the printing and dyeing wastewater from the wastewater treatment station can not reach the standard, and there are often excessive discharges.
In 1998, the State Council launched a massive "zero point action" in pollution control in the Taihu Lake Basin. Faced with the grim reality of the pressing and pressing actions of pollution control, the decision-making layer of Danmao Textile Co., Ltd. realized that, in order for enterprises to survive and develop, they must first pass the threshold of discharge. As a result, the company invested 1.7 million yuan to expand and transform the original printing and dyeing wastewater treatment station. After six months of intensive construction, a processing facility for daily processing of 1,000 tons of printing and dyeing wastewater was completed and put into use in December 1998. In the “Zero Operation†of Taihu Lake, Danmao Textile Co., Ltd. became the first company in Danyang to deliver the required discharge response.
After the transformation, the sewage treated by the sewage treatment station was accepted by the Danyang Environmental Protection Bureau and showed that it has met the national secondary standard of “Water Pollutants for Textile Dyeing and Finishing Industry†(GB4287-92), COD, BOD, ammonia nitrogen, suspended solids, Emissions of pollutants such as PH values ​​meet or exceed emission standards. The company's sewage treatment project was rated as the city's model project by the Danyang Municipal People's Government and the Danyang City Environmental Protection Bureau.
Recently, Danmao Textile Company invested more than 200,000 yuan in the steam trap retrofit. The steam traps used in strip dyeing, dyeing and finishing, spinning, etc. are all equipped with imported steam traps. The steam water is replaced with water vapor. Save about 40 tons of standard coal.
Take the lead in achieving environmental protection "two-liter one"
In 2004, to effectively reduce the total amount of pollutants discharged from the printing and dyeing industry in the Taihu Lake drainage area, Jiangsu Province took the lead in putting forward the new goal of “upgrading and upgrading the standards†in the country. That is, wastewater discharge standards in the printing, dyeing, and dyeing and finishing industries must be increased from secondary emissions to one. At the level of emissions, the COD content has to be reduced from 180 mg/l to 100 mg/l, and BOD, ammonia nitrogen, suspended solids, and other pollutant discharge requirements have increased substantially.
In the face of more stringent requirements, Xu Rongliang proposed that the implementation of national-level emission standards is a matter that concerns the strict implementation of national environmental laws and regulations. If they exceed the standards, they will be illegal emissions.
To this end, Jiangsu Danmao Textile Co., Ltd. did not rely on it, took the initiative to actively introduce advanced pollution control technology, and invested 2.5 million yuan to carry out a transformation of the original sewage treatment facilities, and to improve the sewage treatment capacity. 1000 tons/day increased to 1200 tons/day.
It is understood that the use of advanced equipment after the transformation, a high degree of automation, easy to operate. In the sewage treatment process, a combination of chemical agent treatment and biochemical treatment is used to reduce the amount of pharmaceuticals used through the breeding of bacteria, so as to achieve both the purpose of ensuring the discharge quality and reducing the processing cost.
In June 2004, just as other companies in Danyang City were hesitant to face the challenge of the “two-liter and one-for-one†reform, Danmao Textile's “two liters of one†pollution control project passed the Danyang Environmental Protection Bureau. Acceptance, and completed two years in advance, became the first “printing and dyeing†enterprise in Danyang City to achieve “two-liter oneâ€.
After the completion of the bid upgrading project, the treated wastewater received the COD content of Danyang Environmental Protection Bureau has been reduced to about 70mg/L, which is better than the national “Emission Standard of Water Pollutants for Textile Dyeing and Finishing Industry†(GB4287-92). With the discharge standard, the fluctuation of COD content can be measured within two hours, thereby effectively controlling and preventing the occurrence of abnormal phenomena in the sewage treatment process.
Recyclable water reuse investment of 5 years When Danmao Textile Co., Ltd. won the initiative in achieving pollution control compliance, Xu Rongliang realized that environmental protection is an important carrier and foundation for sustainable development of enterprises, and it is necessary for economic and social development activities. Follow the rules. To do a good job in environmental protection is not only a burden, but can promote the development of the enterprise.
Prior to the Jiangsu Province's call for pollution control enterprises in the Taihu Lake basin that had not yet promoted the reuse of water, Danmao Textile Co., Ltd. at the end of 2006 started from the height of further reduction of the total amount of pollutants, and applied pressure to reuse the water reuse of printing and dyeing wastewater. Listed as "Project No. 1" for environmental protection work in 2007.
To this end, Danmao Textile Company decided to invest 3.5 million yuan to build a water reuse system that will deepen the treatment of 1,000 tons of printing and dyeing wastewater on a daily basis in order to achieve recycling of printing and dyeing wastewater. According to reports, this system is all made of stainless steel and uses fully automated control equipment. The dyeing wastewater collected in production is processed through anaerobic, acidification, oxygen consumption, sedimentation, and air flotation processes through the “two-liter one†system, and is further processed through sand filtration, carbon filtration, ion exchange, and ultraviolet sterilization during discharge. Finally return to the production process for recycling. In this way, printing and dyeing wastewater achieves "zero emissions."
Upon completion and commissioning of the reclaimed water reuse project, annual discharge of printing and dyeing wastewater will be reduced by 300,000 tons, COD emissions will be reduced by 30 tons, ammonia nitrogen emissions by 7.5 tons, and suspended particulate emissions by 21 tons. The company can save 300,000 tons of water each year, save water charges of 825,000 yuan, and reduce pollution fees by 150,000 yuan. The two items can reduce expenses by 975,000 yuan. After deducting the cost of deepwater treatment for reuse, the company can save nearly 700,000 yuan in annual costs. In less than five years, the investment in the water reuse project can be recovered.
At this time, with the approval of the Jiangsu Provincial Government, the Jiangsu Provincial Department of Environmental Protection and the Technical Supervision Bureau issued a new emission standard for printing and dyeing enterprises. It is determined that from June 2008, the wastewater discharge from printing and dyeing enterprises in the Taihu Lake Basin should be reduced from 100 mg/L to 60 mg/l or less. When the new standard was promulgated, Danmao Textile Co., Ltd. had advanced ahead of the standard and became the first printing and dyeing company in Jiangsu Province to achieve 100% water reuse and smoothly achieve “zero emissionsâ€.
The reporter learned that in 2010, Danmao Textile Company invested a further 3.07 million yuan to build a new sewage treatment station. On the basis of daily treatment of 1,000 tons of sewage, the daily processing capacity increased by 1,000 tons. At the same time, black currants will be recycled and reused to achieve the purpose of recycling water. The annual amount of treated medium water can reach 120,000 tons, saving 150,000 yuan.
As a textile printing and dyeing sewage company, how to achieve "zero emission" of waste water, and to achieve energy conservation and emission reduction synchronization with the sustainable development of enterprises?
Xu Rongliang, chairman of Jiangsu Danmao Textile Co., Ltd., gave such an answer: As a polluting enterprise, only by planning ahead, making advances, and gaining initiative in environmental protection can it increase the staying power for the sustainable development of the company.
Energy-saving and emission-reduction became a top priority and went into the production workshop of the company. The reporter discovered a machine with a very different form and the production workshop was occupied by these machines. In fact, in recent years, Danmao Textile Company has continued to carry out technological transformation and has introduced 230 sets of spinning, weaving and finishing equipment with international advanced level from Italy, Germany, Belgium, Switzerland and Japan, so that the coverage rate of imported equipment reaches 80. %the above.
When going to the dyeing and finishing equipment, the person in charge of the company introduced to reporters. Recently, in order to save energy, the company converted the high-temperature and high-pressure dyeing cylinders into large-capacity dyeing cylinders. With the capacity unchanged, the company transformed the dyeing tanks into original ones. Only up to 100 kilograms of tops dyeing cylinders can now dye 200 kilograms. Although the reconstruction cost is nearly 2 million yuan, about 350 tons of standard coal can be saved annually.
In addition, Danmao Textile Company also invested more than 2 million yuan in the dyeing and dyeing workshop to introduce imported small baths than dyeing vats. After the introduction, the bath ratio was 1:3.5, and domestic vats with a bath ratio of 1:10 were eliminated, which reduced energy consumption. Increased production.
Danmao Textile Company found in the production that the high-temperature process water remaining after dyeing the fabric has high heat energy and can be reused. To this end, the company has invested 100,000 yuan to install thermal energy recovery devices in the strip dyeing equipment, so that the original water temperature is increased by about 10°C, and waste heat resources such as high-temperature process water are recycled.
At the same time, Danmao Textile Company also invested 300,000 yuan to install a heat recovery device in the boiler room, so that the waste heat generated by the oil boiler is converted into steam for reuse, and about 200 tons of steam can be generated per month.
Recently, the highlight of Danmao Textile's transformation project is frequency conversion. According to reports, the company invested 1 million yuan in air-conditioning fans, boilers, spinning machines, air compressors and other frequency control. Because the original high-power motor has no frequency conversion, through this frequency conversion transformation, and according to the actual needs of timely adjustment of operating conditions, can save about 15%.
How to become the first Danyang emission standard?
The reporter learned from the interview that Jiangsu Danmao Textile Co., Ltd. built a printing and dyeing wastewater treatment station at the initial stage of the construction of the plant to process the sewage generated by the dyeing of wool textiles. However, due to the sloppy equipment, backward technology, and low efficiency of the sewage treatment station, the printing and dyeing wastewater from the wastewater treatment station can not reach the standard, and there are often excessive discharges.
In 1998, the State Council launched a massive "zero point action" in pollution control in the Taihu Lake Basin. Faced with the grim reality of the pressing and pressing actions of pollution control, the decision-making layer of Danmao Textile Co., Ltd. realized that, in order for enterprises to survive and develop, they must first pass the threshold of discharge. As a result, the company invested 1.7 million yuan to expand and transform the original printing and dyeing wastewater treatment station. After six months of intensive construction, a processing facility for daily processing of 1,000 tons of printing and dyeing wastewater was completed and put into use in December 1998. In the “Zero Operation†of Taihu Lake, Danmao Textile Co., Ltd. became the first company in Danyang to deliver the required discharge response.
After the transformation, the sewage treated by the sewage treatment station was accepted by the Danyang Environmental Protection Bureau and showed that it has met the national secondary standard of “Water Pollutants for Textile Dyeing and Finishing Industry†(GB4287-92), COD, BOD, ammonia nitrogen, suspended solids, Emissions of pollutants such as PH values ​​meet or exceed emission standards. The company's sewage treatment project was rated as the city's model project by the Danyang Municipal People's Government and the Danyang City Environmental Protection Bureau.
Recently, Danmao Textile Company invested more than 200,000 yuan in the steam trap retrofit. The steam traps used in strip dyeing, dyeing and finishing, spinning, etc. are all equipped with imported steam traps. The steam water is replaced with water vapor. Save about 40 tons of standard coal.
Take the lead in achieving environmental protection "two-liter one"
In 2004, to effectively reduce the total amount of pollutants discharged from the printing and dyeing industry in the Taihu Lake drainage area, Jiangsu Province took the lead in putting forward the new goal of “upgrading and upgrading the standards†in the country. That is, wastewater discharge standards in the printing, dyeing, and dyeing and finishing industries must be increased from secondary emissions to one. At the level of emissions, the COD content has to be reduced from 180 mg/l to 100 mg/l, and BOD, ammonia nitrogen, suspended solids, and other pollutant discharge requirements have increased substantially.
In the face of more stringent requirements, Xu Rongliang proposed that the implementation of national-level emission standards is a matter that concerns the strict implementation of national environmental laws and regulations. If they exceed the standards, they will be illegal emissions.
To this end, Jiangsu Danmao Textile Co., Ltd. did not rely on it, took the initiative to actively introduce advanced pollution control technology, and invested 2.5 million yuan to carry out a transformation of the original sewage treatment facilities, and to improve the sewage treatment capacity. 1000 tons/day increased to 1200 tons/day.
It is understood that the use of advanced equipment after the transformation, a high degree of automation, easy to operate. In the sewage treatment process, a combination of chemical agent treatment and biochemical treatment is used to reduce the amount of pharmaceuticals used through the breeding of bacteria, so as to achieve both the purpose of ensuring the discharge quality and reducing the processing cost.
In June 2004, just as other companies in Danyang City were hesitant to face the challenge of the “two-liter and one-for-one†reform, Danmao Textile's “two liters of one†pollution control project passed the Danyang Environmental Protection Bureau. Acceptance, and completed two years in advance, became the first “printing and dyeing†enterprise in Danyang City to achieve “two-liter oneâ€.
After the completion of the bid upgrading project, the treated wastewater received the COD content of Danyang Environmental Protection Bureau has been reduced to about 70mg/L, which is better than the national “Emission Standard of Water Pollutants for Textile Dyeing and Finishing Industry†(GB4287-92). With the discharge standard, the fluctuation of COD content can be measured within two hours, thereby effectively controlling and preventing the occurrence of abnormal phenomena in the sewage treatment process.
Recyclable water reuse investment of 5 years When Danmao Textile Co., Ltd. won the initiative in achieving pollution control compliance, Xu Rongliang realized that environmental protection is an important carrier and foundation for sustainable development of enterprises, and it is necessary for economic and social development activities. Follow the rules. To do a good job in environmental protection is not only a burden, but can promote the development of the enterprise.
Prior to the Jiangsu Province's call for pollution control enterprises in the Taihu Lake basin that had not yet promoted the reuse of water, Danmao Textile Co., Ltd. at the end of 2006 started from the height of further reduction of the total amount of pollutants, and applied pressure to reuse the water reuse of printing and dyeing wastewater. Listed as "Project No. 1" for environmental protection work in 2007.
To this end, Danmao Textile Company decided to invest 3.5 million yuan to build a water reuse system that will deepen the treatment of 1,000 tons of printing and dyeing wastewater on a daily basis in order to achieve recycling of printing and dyeing wastewater. According to reports, this system is all made of stainless steel and uses fully automated control equipment. The dyeing wastewater collected in production is processed through anaerobic, acidification, oxygen consumption, sedimentation, and air flotation processes through the “two-liter one†system, and is further processed through sand filtration, carbon filtration, ion exchange, and ultraviolet sterilization during discharge. Finally return to the production process for recycling. In this way, printing and dyeing wastewater achieves "zero emissions."
Upon completion and commissioning of the reclaimed water reuse project, annual discharge of printing and dyeing wastewater will be reduced by 300,000 tons, COD emissions will be reduced by 30 tons, ammonia nitrogen emissions by 7.5 tons, and suspended particulate emissions by 21 tons. The company can save 300,000 tons of water each year, save water charges of 825,000 yuan, and reduce pollution fees by 150,000 yuan. The two items can reduce expenses by 975,000 yuan. After deducting the cost of deepwater treatment for reuse, the company can save nearly 700,000 yuan in annual costs. In less than five years, the investment in the water reuse project can be recovered.
At this time, with the approval of the Jiangsu Provincial Government, the Jiangsu Provincial Department of Environmental Protection and the Technical Supervision Bureau issued a new emission standard for printing and dyeing enterprises. It is determined that from June 2008, the wastewater discharge from printing and dyeing enterprises in the Taihu Lake Basin should be reduced from 100 mg/L to 60 mg/l or less. When the new standard was promulgated, Danmao Textile Co., Ltd. had advanced ahead of the standard and became the first printing and dyeing company in Jiangsu Province to achieve 100% water reuse and smoothly achieve “zero emissionsâ€.
The reporter learned that in 2010, Danmao Textile Company invested a further 3.07 million yuan to build a new sewage treatment station. On the basis of daily treatment of 1,000 tons of sewage, the daily processing capacity increased by 1,000 tons. At the same time, black currants will be recycled and reused to achieve the purpose of recycling water. The annual amount of treated medium water can reach 120,000 tons, saving 150,000 yuan.
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