[Chicago.com] After undergoing stringent control of volatile organic compounds (VOCs), the coatings industry is currently facing new difficulties. The cost of solid waste treatment has been doubling in recent years, and sometimes even high prices have nowhere to deal with.
Accompanied by the country’s acceleration of the process of prevention and control of the atmosphere and soil, environmental protection policies and regulations have become increasingly stringent, and the cost of environmental protection has risen rapidly. After undergoing stringent control of volatile organic compounds (VOCs), the coatings industry is currently facing new difficulties - the cost of solid waste treatment has multiplied several times in recent years, and sometimes even high prices also deal with nowhere.
At the International Symposium on Environmental Protection Regulations and Better Practices for the Coating Industry 2017 held in Beijing recently, the participants discussed the related policies and implementation status of solid wastes in North America, Europe and China, and the experience of solid waste management in advanced enterprises. Industrial solid waste management, waste packaging, waste paint treatment and other solid waste management methods. The meeting also discussed and communicated on environmental protection hot spots such as VOCs emission control in the production coating process.
Solid waste treatment
Sun Lianying, president of the China Coatings Industry Association, pointed out that "the promotion of environmental protection and the development of green" has become the development vision of the Chinese paint industry. In this context, it is urgent to increase reductions in emission reduction and treatment of VOCs and solid waste. However, in terms of solid waste treatment, the paint industry is also facing severe challenges.
It is understood that the state stipulates that the solid waste produced by the company must be handled by a qualified third party. However, at present, the disposal capacity of waste disposal companies is limited and their levels are uneven. Even more troubling is the fact that there are only a limited number of institutions that can provide certification for waste treatment. Although local governments are also actively expanding waste handling capacity, they still have serious “production†needs. Some companies have 3 to 5 months of time each year. No suitable third party can handle waste. And the pressure of processing costs is very high, especially in some southern cities, the cost of waste incineration even reached 18,000 yuan/ton. For the first time, PPG Asia Pacific's waste disposal costs in 2016 exceeded that of the Australian region, which has been at the forefront.
Dr. He Yi from the Solid Waste and Chemicals Management Technology Center of the Ministry of Environmental Protection stated that although the capacity for centralized disposal of hazardous wastes in China has increased significantly during the “12th Five-Year Plan†period, the industry has been unevenly developed. There is a gap in incineration landfill disposal capacity in some regions, and the incineration and landfill facilities in the central and eastern regions are at full load or even overloaded; the homogenization competition in the comprehensive utilization industry is highly competitive. In 2015, the load rate of hazardous waste utilization facilities nationwide was only 26.4%, and high value hazardous wastes. The phenomenon of excessive use of facilities and the oversupply of oversupply in the industry is prominent. Excessive discharges often occur. At the same time, lack of scientific and technological support capabilities, lack of basic research, hazardous waste identification agencies and identification procedures are not clear. This is the cause of the current soaring costs of solid waste treatment.
He Yi reminded that although the National Catalogue of Hazardous Wastes (2016 version) excludes water-based paints, this does not mean that the use of water-based paint for coating or painting of the barrier coating and the waste generated during painting is not a danger. waste. The "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution Caused by Solid Waste" refers to the definition of hazardous waste as a solid waste that is listed in the "National List of Hazardous Wastes" or has been identified as hazardous according to the national standards for the identification and identification of hazardous wastes. Therefore, although water-based paints are not listed in the National Hazardous Waste List, they still need to be identified as hazardous wastes according to the national standards for identification and identification of hazardous wastes.
Learning from the "stones of other hills"
Europe and the United States and other places have rich experience in the solid waste produced by paint coating. Multinational companies have also taken effective measures in this regard and are worthy of reference by domestic paint companies.
- PaintCare plan
Mr. David, Vice Chairman of the American Coatings Industry Association, explained and compared the governance, legislation, regulation and practice of solid waste and hazardous waste in North America and Europe. Specially introduced the different regulatory projects carried out on architectural coatings in the United States, Canada, the United Kingdom and Australia, including PaintCare, ProductCare and others.
According to David, in the United States, paint waste includes unused raw materials, cleaning materials, filter materials, substandard products, dust, laboratory waste, and packaging waste. For packaging drums, if there is less than 2.5 cm (1 inch) of material remaining in the container, or if the packaging container is less than 110 gallons, the balance of the material does not exceed 3% of the total weight, and the container exceeds 110 gallons, the material balance does not exceed If the total weight is 0.3%, it can be regarded as empty container recycling.
In addition, some developed countries and regions have also established a recycling system for paints, that is, the price at which the consumer purchases the paint contains a certain deposit, which is refunded after the brush is returned to the packaging container, and then these solid wastes are handled by a professional organization. The American Coatings Industry Association (ACA) pioneered the paint management program PaintCare in Oregon in 2009 and then promoted it in other states. At present, 12 million gallons of paint have been recycled. In May 2016, the British Coatings Federation (BCF) launched the PaintCare program. This is an industry-led project for the recovery of unused paint. In April 2016, the Australian Coating Manufacturers Association (APMF) implemented the Paintback program, a comprehensive national voluntary management program for scrap paint and paint packaging.
- Teamwork to identify "waste streams"
PPG is committed to working with the upstream and downstream to reduce the production of solid waste. By the end of 2015, it proposed to reduce the total waste generated by 10% by 2020. PPG Asia Pacific EHS project manager Chen Hong shared the company's solid waste management practice solutions. Chen Hong believes that compared with the large chemical industry, the paint industry has more manual operations, a low degree of automation, and run counterfeiting is more obvious, so there is more room for reducing solid waste production. PPG has developed a process called “waste stream†that aims to systematically analyze the process of waste generation, find improvement opportunities, help the company realize its vision of sustainable development, make better use of resources, and achieve operational goals. During the identification process of “waste streamâ€, the team composed of production, quality, warehousing and technology personnel mainly through field inspections, discovered what kind of waste will be generated? What is the amount? In order to think about how to reduce the generation of waste.
Reduce VOCs to see the whole life cycle
In recent years, the regulatory measures for VOC emissions in China have continuously tightened, as shown in Figure 1. In 2016, the Action Plan for Reduction of Volatile Organic Compounds in Key Industries has screened 11 key industries such as coatings, automobiles, and furniture to accelerate the reduction of VOCs. Plan Implementation Period 2016 - 2018, plans to reduce the use of solvents and auxiliaries such as benzene, toluene, xylene, dimethylformamide (DMF) by more than 20%, and the proportion of coating products with low (no) VOCs to over 60% . Industrial coating industry: The overall removal rate of container VOCs is 80%; the coil manufacturing reaches 70%; the steel structure reaches 30%. The number of VOCs control projects has increased from about 20 to about 150, and the emission limits have been tightened to 10% of existing standards, which is 15%. Emissions standards range from the exhaust pipe discharge standards at the end to the standards covering the entire process, including process emissions, storage tanks, handling and transfer, and wastewater treatment units.
Axalta China has been upgrading its product strategy since 2007. Waterborne paint systems and high solids coating systems have replaced solid solvent-based systems in high VOCs, reducing thousands of tons of solvent consumption each year. Yan Shicheng, Product Director of Axalta Greater China, believes that in order to achieve sustainable VOCs emission reduction, we must first achieve effective cooperation among the industry, regulatory agencies, and social charities, and formulate regulations on reasonable balances for specific market segments to fully understand the products. , product line and its utilization efficiency.
Xiu Guangli, vice president of the East China University of Science and Technology Institute of Resources and Environmental Engineering pointed out that the current VOCs emission reduction still faces many challenges and confusion: On the one hand, lack of professional VOCs management personnel, different cities have different control systems, VOCs definitions are different, The detection methods are different; on the other hand, companies are at a loss when choosing control technologies. In addition, the conflict between VOCs control and safety, fire protection, and energy conservation policies, and the contradictions that control investment and emissions compliance also make companies difficult. He suggested that companies and governments should consider the contribution of emission reduction measures directly and indirectly to the reduction of plutonium pollution, as well as the relationship between water-based paint and water pollution, solvent-based paint and air pollution. At the same time, attention should also be paid to the secondary pollution of the VOCs emission reduction measures. For example, the combustion method will increase the emission of nitrogen oxides and carbon dioxide; the absorption method will cause water pollutants; the absorption method will cause solid waste pollution. Therefore, the benefit analysis based on the whole life cycle is the key to selecting a reasonable technology.
According to Yang Yuande, secretary general of the China Coatings Industry Association, the "three wastes" produced during the paint coating process are far greater than those produced during the paint production process. The paint coating industry should reduce the emissions of solid wastes and VOCs. The production process should focus on improving product yields, achieve full-blown integrated production, prevent spills and leakages, implement lean management, block the “three wastes†generation node, and improve collection. Rate and processing rate. In the coating production process, it is necessary to use high-solid, water-based and solvent-free coatings on the one hand; on the other hand, to improve the coating method and improve the utilization of coatings; in addition, in the end of the treatment, to improve the "three wastes" Collection and processing rates, correct purchase and use of end-of-pipe equipment.
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