VOCs runner adsorption technology status, trend and market analysis and comparison at home and abroad

VOCs runner adsorption technology status, trend and market analysis and comparison at home and abroad
Volatile organic compounds (VOCs) are one of the main sources of air pollutants, especially haze. The World Health Organization and other institutions will define VOCs as: under standard atmospheric pressure, melting point is lower than room temperature, boiling point in 323.15 ~ 533.15K organic compounds, such as benzene, toluene, xylene, naphthalene, etc. VOCs from petrochemical, pharmaceutical, printing, shoe manufacturing, automobile manufacturing, electronic manufacturing and other industries, according to estimates, the national volatile organic compounds (VOCs) emissions up to more than 30 million tons, VOCs not only cause damage to the environment, but also bring a threat to human health. Countries around the world have developed relevant laws and regulations on VOCs emissions, as far as possible to reduce and eliminate VOCs emissions. However, limited by the level of production technology, as well as cost pressure, most of the ways to control VOCs emissions can only be in the exhaust phase. At present, the methods to control VOCs emission mainly include recycling technology and destruction technology. In practice, often according to the air volume, concentration, type, economic value and other specific circumstances of VOCs in the exhaust gas to choose one or several combinations of use. Runner adsorption technology is one of VOCs recovery technologies.
Foreign technology status and trend
Since the 1960s, the application of adsorption enrichment-desorption concentration-heat storage catalytic oxidation post-treatment technology has appeared in Europe and the United States and other countries. Durr Company in Germany, Megtec, Enguil Company in the United States and Biothermica Company in Canada, etc., occupy the majority of the market in the industry. As the core material of the whole technology, the improvement of the quality of the adsorbent and its utilization mode will significantly help to improve the level of waste gas treatment. Swedish CarlMunters innovatively proposed the concept of making the adsorption material into a runner with honeycomb structure for the separation process, and applied for a patent in 1974. In 1986, Munters took the lead in Sweden to use honeycomb zeolite runner for VOCs waste gas treatment. In 1988, Japan Corporation West Technology Research Company will be processed into corrugated and plate shape of ceramic fiber paper with inorganic adhesive bonded together and rolled into a honeycomb structure of the runner, and then the hydrophobic zeolite coated on the surface of the honeycomb channel to get adsorption runner, and successfully used for VOCs purification treatment. In addition, the related products of Nippon Nikas also represent the advanced level of the current world. At present, in Japan, the United States, Europe and Taiwan, the rotary adsorption concentration technology has been widely used in the treatment of low concentration and high air volume industrial organic waste gas. Generally speaking, the production technology of zeolite adsorption runner is still in the hands of foreign enterprises, The companies include Munters of Sweden, DST of Sweden, ProFlute of Japan, NICHIAS of Japan, Daikin of Japan and atea-WKUSA of the United States. Among the combustion technologies adopted by runner concentrated VOCs, the universal, efficient and thorough treatment technologies are oxidation combustion technology and catalytic combustion technology. Among them, catalytic combustion technology can make VOCs at a low temperature oxidation reaction, effectively reduce the equipment operating power. On the basis of catalytic combustion technology, adding ceramic heat accumulator and waste heat reuse system is called regenerative catalytic combustion technology (RCO), which can significantly save energy and reduce consumption. In the last century, Mitsubishi Company of Japan designed a heat storage device with movable valve switching, and adopted ceramic honeycomb body with high heat storage capacity, and carried out practical application. In addition to the continuous improvement of the equipment process, the research and development of catalysts is also a key content affecting the waste gas treatment. Foreign researchers have reported a series of experimental results of different metal catalysts such as Pt supported by Pd, Au, Ce and Al2O3 for catalytic combustion degradation of VOCs. SuD-Chemie Company in Germany is one of the successful enterprises in the development of catalysts for oxidative degradation of VOCs. Although a few foreign companies have mastered the key technology of zeolite enrichment wheel, the optimization and matching scheme of enrichment system and oxidation system is still to be improved, and the price of relevant products in foreign countries is high, which limits the large-scale popularization and application of this technology in domestic painting, automobile spraying and other industries.
Foreign technology status and trend
Domestic zeolite adsorption and concentration equipment started late, production enterprises mostly assembly, agent as the main business model, as the core of the equipment zeolite adsorption unit is basically dependent on imports, foreign enterprises with production technology have also set up equipment assembly plants in China. However, domestic existing zeolite runner molding and preparation technology level and foreign gap is gradually narrowing. Up to now, research teams of several universities and research institutes in China have carried out relevant research on zeolite runner, including South China University of Technology, Zhejiang University, etc. However, if we want to reach and surpass the foreign similar products, we need to innovate and develop the runner preparation technology, and form the runner preparation technology with independent intellectual property rights. In recent years, the development of catalytic combustion technology has tended to mature. For catalytic combustion technology, it is the future development trend to use honeycomb full-effect heat exchanger to recover low-grade heat source, further optimize the structural design of the system and realize standardization and modular design. Representative enterprises include Qingdao Huashijie Environmental Protection Technology Co., LTD., Beijing Chuangdao Aofu Fine Ceramics Co., LTD., Fuzhou Jiayuan Environmental Protection Co., LTD. At present, the domestic technical specifications related to industrial organic waste gas are: "volatile organic matter (VOCs) pollution prevention technology policy", "adsorption method industrial organic waste gas treatment engineering Technical specification", "catalytic combustion method industrial organic waste gas treatment engineering Technical specification", series of standards are: "HJ/T4389-2007 Industrial waste gas catalytic purification device", "HJ/T386-2007 Industrial waste gas adsorption and purification device", "HJ/T387-2007 Industrial waste gas absorption and purification device", "GB20101-2006 painting operation safety regulations of organic waste gas purification device safety Technical Regulations", etc. But up to now, there is still no zeolite adsorption runner device and zeolite adsorption thermal storage catalytic oxidation coupling device related technical specifications, manufacturing standards and product technical requirements published. With the continuous improvement of technology and the increasing expansion of the coating industry VOCs governance market, it is urgent to develop the corresponding standards and specifications. In a word, relevant technical research has been carried out in China, which has a good research foundation, but breakthroughs need to be made in core material research and development, systematic integration, demonstration project application and other aspects. The improvement of the comprehensive level and even exceeding the international level will be of significant help to improve the treatment level and equipment level of large-air volume, medium-low concentration VOCs in domestic painting and other industries, and promote the development of domestic industrial organic waste gas treatment industry.以上翻译结果来自有道神经网络翻译（YNMT）· 通用场景