VOCs processing technology, what is VOCs?

I'm Fang Liang, deputy general manager of Deqing Tianhao Environmental Protection Technology Co., Ltd. now I'm discussing the treatment of organic waste gas (VOCs) with qunyou based on the actual experience of our company. As we all know, the remediation of environmental pollution is very important and urgent. Environmental protection has attracted the attention of all countries and mankind all over the world. The International Olympic Committee assessment team inspected the bid cities and listed the improvement of the ecological environment as an important content. China attaches great importance to the environmental protection workbench, has issued many environmental protection policies and regulations, and carried out many environmental protection work and activities. VOCs is one of the main sources of air pollution. VOCs waste gas is common in paint production, chemical fiber industry, metal coating, chemical coating, shoe and leather making, electroplating, plywood manufacturing, tire manufacturing, wastewater treatment plant and other industries. Harmful volatile organic compounds mainly include acetone, toluene, phenol, dimethylaniline, formaldehyde, ethyl acetate, ethanol, etc. Since its establishment, the company has been aiming to build an influential domestic environmental protection enterprise, increasing R & D investment, strengthening technological innovation, and constantly improving the enterprise's independent core technology R & D and industrial development ability. The company now has advanced organic waste gas treatment technologies at home and abroad, such as th-dlz (plasma organic waste gas purifier), th-gcu (microwave photolysis organic purifier), and has mature market experience in VOCs waste gas treatment. There are many technologies and processes that can be used for the treatment of industrial VOCs waste gas, such as absorption and hair method, oxidation method, adsorption method, biological method, low-temperature plasma and microwave photolysis. The most commonly used methods are combustion and adsorption. Absorption method is less used now. Photocatalysis, biological method and low-temperature plasma are the frontier and hot technologies of VOCs waste gas treatment at present. The operation principle, application scope, advantages and disadvantages of each treatment method are briefly described below. 1. The masking method adopts the mixing of stronger aromatic smell and odor to mask the odor and make it acceptable. It is applicable to the occasions where the impact of low concentration odor gas needs to be eliminated immediately and temporarily. The odor intensity is about 2.5. There is no organized emission source, which can eliminate the odor impact as soon as possible. It has great flexibility and low cost. The odor components have not been removed 2. The dilution diffusion method discharges the odorous gas to the atmosphere through the chimney or dilutes it with odorless air to reduce the concentration of odorous substances to reduce the odor. It is suitable for the treatment of medium and low concentration odorous gases discharged in an organized way. The cost is low, the equipment is simple, and it is easy to be limited by meteorological conditions, and the odorous substances still exist 3. The thermal combustion method fully mixes the odorous substances and fuel gas at high temperature to realize complete combustion. It is suitable for the treatment of combustible gases with high concentration and small gas volume. The purification efficiency is high. The odorous substances are completely oxidized and decomposed. The equipment is easy to corrode, consume fuel, have high treatment cost and easy to form secondary pollution 4. The cost of catalytic combustion method is too high to be applied by enterprises 5. The water absorption method uses the characteristics that some substances in the odor are easily soluble in water to make the odor components directly contact with water, so as to dissolve in water to achieve the purpose of deodorization. The odor gas with water-soluble and organized emission source has the advantages of simple process, convenient management, low equipment operation cost and secondary pollution, so the washing solution needs to be treated; The purification efficiency is low, so it should be combined with other technologies, and the treatment effect of mercaptan and fatty acid is poor 6. Liquid medicine absorption method uses the chemical reaction characteristics of some substances and liquid medicine in the odor to remove some odor components. It is suitable for dealing with odor with large volume and high and medium concentration. It can deal with some odor components pertinently. The process is mature, the purification efficiency is not high, the absorbent is consumed, and it is easy to form secondary pollution 7. The adsorption method uses the adsorption function of the adsorbent to transfer the odor substances from the gas phase to the
23 2018/03

Water pollution prevention and Metallurgy: actual record of response

On the morning of August 29, 2015, the 16th meeting of the Standing Committee of the 12th National People's Congress held a joint group meeting to inquire about the report of the law enforcement inspection team of the Standing Committee of the National People's Congress on inspecting the implementation of the law of the people's Republic of China on the prevention and control of water pollution. Chairman Zhang Dejiang attended and commented. Wang Yang, the leader of the State Council, led the team to answer questions. Chen Jining, the Ministry of environmental protection, Lou Jiwei, the Ministry of Finance and Wan Gang, the Ministry of science and technology answered questions. The joint group meeting was chaired by Shen Yueyue, vice chairman of the Standing Committee of the National People's Congress. At this meeting, members of the Standing Committee of the National People's Congress discussed how the State Council can accelerate the prevention and control of water pollution, how to implement the principle of "prevention first", how to ensure the current safety of rural drinking water in China, how to strengthen the prevention and control of industrial pollution, how to effectively solve the problems of agricultural non-point source pollution and related groundwater pollution, and how to deal with the problems of drinking water safety caused by heavy metal pollution How to prevent the further degradation of wetlands and the relevant considerations of the introduction of value-added tax policy. The principal leaders of the nine departments attending the meeting answered the above questions. Wang Yang said that the task of water pollution prevention and control is still very arduous. It requires not only the fundamental transformation of development concept and development mode, but also the breakthrough of science and technology, as well as the strong support of investment and law. For water pollution control, the State Council will focus on the source, treatment, reform, guarantee and implementation in the next step. Chen Jining believes that prevention is the first priority of environmental protection, but there are some problems in the implementation of prevention, such as difficult structural adjustment, difficult implementation of planning EIA, inadequate project EIA and incomplete supporting policies. The next step will be to optimize the spatial layout and strict regional environmental access, accelerate the optimization and adjustment of industrial structure, and implement the responsibility of local government project approval Improve the system construction of relevant policies and regulations. Miao Wei pointed out that industries with high energy consumption and high pollution lack the support of policies and funds, and the overall water-saving work of industry is relatively weak. The next step will be to improve the industry management system, optimize the spatial layout, optimize the industrial structure, effectively resolve excess capacity, strengthen water conservation and pollution reduction, fully implement green manufacturing, improve support policies, and actively promote the relocation and transformation of heavily polluting enterprises. Han Changfu believes that agricultural non-point source pollution is very reversible, which is different from other pollution. He has methods and confidence to solve this problem. During the 13th Five Year Plan period, five measures will be taken, namely: reducing substitution and implementing zero growth action of chemical fertilizer; Reduce and control the harm and implement the action of zero growth of pesticides; Combine planting and breeding, and vigorously promote the treatment of livestock and poultry manure; Five modernizations go hand in hand and comprehensively carry out straw resource utilization; Comprehensive measures should be taken to solve agricultural film pollution. Wang Yi said that in the next step, the Ministry of finance, together with the State Administration of Taxation, the national development and Reform Commission and the Ministry of housing and urban rural development, including industry associations, will conduct some in-depth research on the implementation of circular 78 in enterprises, especially waste recycling enterprises, understand the actual situation, make a comprehensive assessment, and put forward solutions to problems according to the situation, so as to better reduce the impact. At the end of the meeting, Wang Yang concluded that the issues raised at the meeting grasped the key and key points of water pollution control, which not only reflected the attention and concern of the whole society for water pollution control, but also reflected that the members' research and Analysis on this issue were very profound, and played an important role in promoting the further improvement of the State Council and relevant departments of the State Council. Background information: in order to fully understand the implementa
23 2018/03

Internet + MBR | post-80s losers build a new model of environmental protection industry

The post-80s generation is not a dreamer in the ivory tower, but a doer who strives for his dream. They use entrepreneurship to change their destiny, and they move people with their true feelings. Different life, the same youth motivation. A male designer who graduated from the school of urban construction of Nanjing University of technology in 2004, majoring in water supply and drainage, could not hold the loneliness and continued to earn a master's degree in Environmental Engineering in the ivory tower, becoming a real environmental protection "loser" male. From school to society, relying on the professional ability, we have successfully obtained an "iron rice bowl" yearned for by the students of the science class - Shanghai Institute of Applied Physics, Chinese Academy of Sciences. Superior working environment and benefits, in the view of other students, this is a job that can be retired. However, for Zhou, the excitement brought by the research institute soon made him feel that the current state is gradually far from his dream. Environmental protection "loser" Zhou does not want to drift with the tide, but is dedicated to the research and development of membrane water treatment technology every day and tries to promote the engineering application of flat membrane technology in domestic sewage treatment industry. At the same time, he was responsible for the key scientific and technological project of Shanghai Science and Technology Commission "Research on high efficiency anaerobic membrane bioreactor". Zhou knew in his heart that the life he wanted was not nine to five, not plain. Even if the future road was full of thorns and bumps, he still smiled at life. In that year, he resolutely quit his job at the Chinese Academy of Sciences and joined the business sea to start a long road of entrepreneurship. With Zhou's efforts, Nanjing ruijiete Membrane Separation Technology Co., Ltd. was registered and established in 2010, quickly organized a team to join the upsurge of environmental protection construction, closely approached industry organizations, and became a member of China Environmental Chamber of Commerce and Jiangsu Environmental Protection Industry Association; In February 2011, the company successfully developed a new generation of flat filter membrane. The product quickly entered the environmental protection market and was successfully applied in difficult wastewater projects. It was successfully operated in the advanced treatment of 500m3 / D polysilicon chip wastewater for the first time, which tested the product performance and won the industry reputation. The enterprise actively cooperates with Guteng water, the main media in the industry, signs strategic cooperation agreements and improves the brand of the product industry. In the five-year development process, the team spirit of the company has gradually formed and achieved fruitful results with the joint efforts of all staff. The company has completed more than 10 patents and successfully won the title of private science and technology enterprise in Jiangsu Province, high-tech enterprise in Jiangsu Province and cutting-edge enterprise of China Membrane Industry Association. With a total scientific research fund of more than 2 million yuan and outstanding achievements, it has won the third prize of scientific and technological progress of Jiangsu Provincial Department of environmental protection, the second prize of scientific and technological progress of China Membrane Industry Association and the third prize of scientific and technological progress of Jiangning. Loser dead man received a lot, and won the title of the top ten leaders in Jiangning District of Nanjing in 2011-2012; Won the 2012 Jiangning District Youth League Committee entrepreneurship and innovation cutting-edge figure; Won the mother river award of Jiangsu Provincial Committee of the Communist Youth League in 2013; Won the 10th batch of high-level talent selection and training of "six talent peaks" in Jiangsu Province in 2013 and 321 science and technology entrepreneurs in Nanjing; In 2014, the government sent management training to Tel Aviv University and Nanjing University and Peking University. In 2015, he won the title of outstanding person of China Membrane Industry Association. Five years have passed in the twinkling of an eye. The honor gained by loser week in the past five years has been admired and admired by people in the industry. For a grass-roots, it is hard for us to imagine the difficulties and twists experienced during this period, but it is certain that this must not be an easy thing. However, Zhou is not satisfied with his current achievements, which may be far from Zhou's dream. He regards the current achievements as a new starting point, and the hard-working life has just begun for him. As one of the tens of millions of environmental entrepreneurs, or perhaps those engaged in environmental protection technology, they exude a sense of righteousness.
23 2018/03

Jiangsu starts the mechanism of differentiated collection of sewage treatment fees for environmental protection levels

Xinhua news agency, Nanjing, February 16 (reporter Qin Huajiang) - five departments including Jiangsu Provincial Department of Finance and Jiangsu Provincial Department of environmental protection recently issued the "measures for the administration of the collection and use of sewage treatment fees in Jiangsu Province", which stipulates that enterprises with poor environmental protection credit rating will charge at least 0.6 yuan / cubic meter of sewage treatment fees, so as to give play to the role of the sewage treatment fee charging policy in promoting the optimization and adjustment of industrial structure. The measures pointed out that the environmental protection department should strengthen the supervision of heavy pollution industries (chemical industry, medicine, steel, printing and dyeing, papermaking, electroplating and other industries). Encourage qualified areas to gradually formulate charging standards according to the enterprise environmental protection credit evaluation grades carried out by the environmental protection department, establish a dynamic adjustment mechanism according to the five grades of green, blue, yellow, red and black, and increase the sewage treatment fee of enterprises rated as "red" by no less than 0.6 yuan / m3; For enterprises rated as "black" and rated as "red" for more than two consecutive times, the additional standard of sewage treatment fee shall not be less than 1.0 yuan / m3; For areas that do not have the differentiated policy according to the environmental protection credit rating of enterprises for the time being, the sewage treatment fee of heavy pollution industry is still 1.5 times higher than that of general industry and commerce. According to the requirements of the measures, the local urban drainage competent departments, together with the finance and price departments, shall clarify the specific list of enterprises implementing the differentiated charging policy, the additional charging standard of sewage treatment fee and the starting and ending time of implementation according to the environmental protection credit evaluation results of enterprises in the previous year published by the environmental protection department to the society every year; The implementation period of the differentiated charging policy is one year. After the environmental protection credit evaluation result of the enterprise reaches the "yellow" level or above in the next year, the implementation of the differentiated water price will be stopped. The additional sewage treatment fee shall be paid by the collection unit to the finance at the same level and shall not be used for other purposes. The measures also point out that by the end of 2016, the average charging standard of sewage treatment fees for cities above the county level in southern Jiangsu should be adjusted to 1.5 yuan / m3 to 2.0 yuan / m3, and the average charging standard of sewage treatment fees for cities above the county level in Central Jiangsu and Northern Jiangsu should be adjusted to 1.2 yuan / m3 to 1.6 yuan / m3; The charging standard of sewage treatment in established towns shall be levied according to the average of no less than 0.6 yuan / m3 and 0.4 yuan / m3 in southern Jiangsu and other regions respectively. The specific standard shall be formulated by the price department of each city and county in conjunction with the financial department.
23 2018/03
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