13 industries into the scope of rectification Guangdong how to attack VOCs?

“In 2016, Guangdong Province will accelerate the promotion of VOCs in key industries such as petrochemicals, printing, furniture manufacturing and shoemaking, and encourage companies to optimize the procurement and use of materials with low VOCs content.” At this year's meeting of Guangdong Provincial Environmental Protection Bureau, Guangdong Province Lu Xiluo, Director of the Department of Environmental Protection, said. With the advancement of air pollution prevention and control, VOCs governance has become a must for enterprises. He pointed out that in the future, Guangdong's air pollution prevention and control work will focus on the governance of VOCs, and he will first select a group of key enterprises in Dongguan, Zhongshan, Shunde, Shenzhen and Jiangmen to carry out VOCs governance demonstration to control and reduce VOC emissions. The key remediation involves 13 industries with complex VOCs components, a wide range of sources of pollution, and control needs to be strengthened. “From the perspective of Guangdong, industrial production is the main source of VOCs, involving a large number of enterprise industries, exacerbating the complexity of VOCs sources. Zhang Ruifeng, deputy director of the Guangdong Province Environmental Protection Department's Atmosphere Department, pointed out that Guangdong's petrochemical enterprises are widely distributed, and Guangdong is also a major province of paint, packaging, furniture and printing. These industries are large VOCs emitters. In addition, relevant persons from the Guangdong Provincial Academy of Environmental Sciences also pointed out that as a production base for 50% of the country's containers, the total amount of VOCs emitted from container manufacturing in Guangdong is quite alarming. This industrial feature has also increased the difficulty of VOCs governance in Guangdong Province. In the "Guangdong Provincial Department of Environmental Protection's Implementation Plan for the Comprehensive Improvement of Volatile Organic Compounds in Key Industries (2014~2017)", 13 key industries were included in the scope of remediation, including petroleum and petrochemical, chemical raw materials and chemical product manufacturing, and chemical drugs. Pharmaceutical manufacturing, synthetic fiber manufacturing, surface coating, printing, shoemaking, furniture manufacturing, man-made board manufacturing, electronic component manufacturing, textile printing and dyeing, plastics manufacturing, and plastic products and life services. "Compared with conventional pollutants such as sulfur dioxide, VOCs have a complex composition, a wide range of sources of pollution, and emissions that are fugitive and end-effects are minimal." Zhang Ruifeng frankly stated that only by controlling the total amount of industry, the specific project emission reduction measures Do point-to-point, eliminating or reducing emissions from the source can effectively reduce VOC emissions. As early as 2012, the Guangdong Provincial Department of Environmental Protection issued the “Opinions on the Control of Volatile Organic Compounds (VOCs) Emissions from Industrial Enterprises in the Pearl River Delta Area”, and it took the lead in VOCs pollution in Guangzhou, Shenzhen, Dongguan, Foshan and Zhongshan. Prevention and control of the pilot work, the oil, chemical industry as the key industries emitting VOCs focus on monitoring. However, pollution control of key VOCs is not optimistic. “The first batch of VOCs key regulatory companies in the province totaled 1,411. Judging from the results of our survey, the level of pollution prevention and control was generally poor.” The person in charge of the Guangdong Provincial Environmental Protection Office's Atmosphere Department mentioned that the Guangdong Provincial Environmental Protection Agency had previously organized personnel. A random survey of 631 of these 1411 companies found that nearly one-third of companies had no VOCs governance facilities. Emissions reduction should start from the whole process of production enterprises to take measures to reduce emissions in accordance with their own characteristics, to achieve pollution control and recycling After successive years of pollution complaints experienced by neighbors, Dongguan Merrill furniture factory chief Chen Baixi finally decided to invest 100 10,000 yuan, rectify the pollution prevention and control equipment of the paint shop, and change the original “active carbon adsorption” treatment process to the reagent spray exhaust gas treatment process to reduce VOC emissions. This also means that in the future, the company's exhaust gas treatment operating costs will increase by about 30%. "However, this environmental investment is worthwhile for the long-term development of the company." Chen Baixi said. In the Pearl River Delta region, especially in Zhongshan, Dongguan, Shunde and other places with a large number of furniture, printing, paint and other enterprises, VOCs governance is an important issue these companies are currently facing. The packaging and printing industry in Xiaolan Town, Zhongshan City has already reached a certain scale. Green Cloud Chemicals Co., Ltd., located here, is currently the largest manufacturer of baby diaper tapes in Asia. Walking in the middle of the factory area, the pungent odor of the imagination did not appear. Above the workshop where each adhesive was used, there was a special inverted bucket cover to absorb volatile organic solvents. Flip buckets are connected through pipes and finally the gas is sent to the centralized treatment facilities in the factory. Volatile gases are first adsorbed by activated carbon fibers, and then converted to high-temperature, high-concentration organic gases after steam analysis. The organic solvent is then reformed by a condensation step. “Our device can recover one ton of organic solvent per day and the recovery rate reaches more than 85% and the recovery purity can reach 97%.” The staff member said, “Some organic solvents are doped with impurities in the production process and need to be reprocessed, while others It can be directly used as a raw material and reused in production.” The petrochemical industry is a major emitter of VOCs, and governance has therefore attracted much attention. In May 2015, the Ministry of Environmental Protection replied in writing to Guangzhou to implement the Trial Measures for the Calculation of Triphenyl Emissions in VOCs in Guangzhou, and levied VOCs on sewage charges for enterprises engaged in petroleum refining, oil storage, transportation and sales, and automobile and shipbuilding. In the CNOOC Shell Petrochemical Plant, scales appeared on the long pipes, and signs were hung with patchwork. “The listed office representatives may have the risk of exhaust runaway and need to be tested. There are more than 54,000 signage of this kind.” The staff member said that the whole plant LDAR (leakage detection and repair technology) work has been successfully completed and passed through Guangdong. Provincial Environmental Protection Agency accepted. According to expert assessments, it is estimated that about 82 tons of emission reduction VOCs can be achieved each year. Environmental experts admit that, although leak detection technology requirements are not high, but there are many unstructured emission points, one by one to determine the huge workload. According to reports, the petrochemical city Huizhou has taken VOCs comprehensive control as the top priority for major pollution prevention and control in 2015. It organized a 100-day inspection of environmental safety in the petrochemical area and conducted investigations on nearly 40 petrochemical companies in the Dayawan Petrochemical Area. Since VOCs emissions are characterized by disorganized emissions, effective control must be considered from the entire production process. “From the selection of the process to the production of the product, we are trying our best to reduce VOC emissions,” said Luo Wenlin, an engineer at BASF's Paper Chemicals (Huizhou) Co., Ltd. BASF Paper Chemicals (Huizhou) Co., Ltd. mainly produces carboxylated styrene-butadiene latex, used in paper and carpet industries. Due to the use of raw materials such as styrene and butadiene, VOCs are produced during the production process. Through technological innovation, after the raw materials styrene and butadiene have passed through the reaction vessel and post-treatment vessel, the conversion rate can reach over 99.99%. "As the conversion rate increases, the remnants of VOCs will fall. The converted product will also go through a stripping column where it will be purified and washed in layers to remove residual VOCs." Luo Wenlin revealed that the filtered VOCs will eventually It was sent to a thermal incinerator for incineration. Promulgated measures to incentivize enterprises to complete emission reductions of industrial-source VOCs emissions and plan to incorporate VOCs into the total emission reduction targets of Guangdong Province In the second half of 2015, Dongguan’s air quality experienced a major decline due to ozone pollution, ranking once in the national key cities. Dropped to more than 40 places. The main pollution factors that cause ozone pollution are VOCs and nitrogen oxides. Under the circumstances of significant reduction of nitrogen oxides, VOCs governance has become an important factor in improving ozone pollution. Therefore, the "Dongguan City Ozone Pollution Prevention and Control Special Action Plan (2015~2017)" will focus on furniture, shoemaking, thermal power, and printing industries, and explicitly prohibit the construction of new VOCs emission industries in the access area. Projects (excluding major municipal projects). According to Fang Canfen, director of the Dongguan Municipal Environmental Protection Bureau, Dongguan will find out the base of VOC emissions in the city, focus on the VOCs verification of the furniture and footwear industries, explore and work out a comprehensive set of VOCs approved management system, Re-promote to other industries. In order to encourage enterprises to reduce emissions, Shunde District of Foshan City issued the “Opinions on the Implementation of Pilot Work for Paid Use of Emission Permits and Trading in Shunde District”, which listed the industrial VOCs emissions from furniture and footwear industries as pilot targets. The person in charge of the environmental protection department in Shunde District said: “The market will compensate enterprises for environmental protection actions and encourage companies to implement emission reduction measures.” It is reported that Guangdong is actively planning to incorporate VOCs into total emission reduction target requirements. “At present, the province’s industrial sources of VOCs emission investigations are nearing the end.” According to the relevant person in charge of the Guangdong Provincial Environmental Protection Office, this will provide reference for the development of related management policies and governance measures for total VOC emissions during the “13th Five-Year Plan” period. “Incorporating VOCs into total emission reduction targets in Guangdong Province. Through the implementation of total industry controls, we will vigorously promote the comprehensive improvement of VOCs in key industries such as petrochemicals, plastics, printing, and furniture, reduce VOC emissions from the source, and improve air quality.” In short, The prevention and control of atmospheric pollution continues to advance, and if VOCs companies are willing or unwilling to invest in VOCs, effective governance of VOCs will become their responsibility. As industry experts say, environmental protection is an industry. As a market-oriented company, it cannot passively prevent and control. Instead, it must take the initiative to attack environmental protection concepts in the course of business operations before it can have a broader space for development. Related links Why focus on VOCs? "Volatile organic compounds (VOCs) can be converted into particulate matter and become an important part of PM2.5, and volatile organic compounds and nitrogen oxides can form ozone under certain conditions. Therefore, the management of volatile organic compounds. It is one of the key tasks for the prevention and control of atmospheric pollution.” Hao Jiming, an academician of the Chinese Academy of Engineering, has repeatedly emphasized the importance of VOCs prevention and control for air pollution control work on various occasions. After years of efforts, Guangdong's air pollution control work has achieved remarkable results. In 2015, the number of haze days in Guangdong dropped to less than 21 years, and the annual concentrations of PM2.5 and PM10 dropped to 34 μg/m3 and 51 μg/m3. However, accompanying this, the problem of ozone pollution is becoming increasingly prominent, and the pollution of VOCs that is closely related to ozone pollution has started to be included in the focus of Guangdong's air pollution control. "Unlike primary pollutants that directly pollute the air, ozone is a secondary pollutant, and most of them are produced by the photochemical reaction of nitrogen oxides and VOCs emitted from automobile exhausts, industrial production, and sunlight." Zhong Fengju, chief expert of Guangdong's atmospheric environment Indicated. Zhang Ruifeng, deputy director of the Guangdong Province Environmental Protection Department's Atmosphere Department, said: “With the completion of the total emission reduction task, especially with large-scale denitrification and a significant reduction in the concentration of nitrogen oxide pollution, the ozone pollution trend is on the rise. Last year it was even more. It is not difficult to see that VOCs are one of the major culprits in replacing PM2.5 as a major atmospheric pollutant in the cities of the Pearl River Delta region. The continuous improvement of air quality requires an issue of VOCs as a source of pollution. How do companies do? According to the Guangdong Province Environmental Protection Agency personnel related to the atmosphere, the future of enterprises involved in VOC emissions must adopt closed integrated production technology. For example, the feed inlet, detection port, and product distribution point of the production facility must be subjected to waste gas collection and purification. The purification efficiency should be greater than 90%. The reactor should be fed by pipes, the bottom feed or immersed pipe feed, and the top added liquid should be used. Conduit feeding; Condensate returning device should be installed in the breathing pipe of the reactor; The gas collecting device or enclosed area should be provided for the casting (exiting) material, and the negative pressure exhausting should be adopted for the inconvenient sealing. Liquid organic material storage must also be further regulated. Liquid organic chemical raw materials, intermediate products, and finished products should be stored in sealed containers. All organic material storage tanks with lower boiling points should be fully insulated and equipped with nitrogen sealing devices. Balanced tube technology should be used during loading and unloading. Larger-sized storage tanks should be sealed with high efficiency. (External) floating roof tanks; large-scale storage tanks should adopt high-efficiency sealed floating roof tanks and nitrogen sealing devices. Enterprises must also strengthen the comprehensive treatment of organic waste gas. Reaction, distillation, vacuum, solid-liquid separation, dispersion, grinding, drying, feeding, unloading, sampling, material transfer, reactor cleaning and other production processes should be centralized collection and purification of organic waste gas, purification efficiency should be greater than 90% . Single-component high-concentration waste gas is preferentially considered for pretreatment with various recovery processes; organic solvent waste gas is preferentially collected by condensation, adsorption-condensation, and ionic liquid absorption equipment, and combustion methods that are difficult to recycle should be used for efficient treatment.