Warren Environmental Sharing | The strongest brain for waste gas management tips:

From January 17 to 18, the Symposium on the causes, control and trend analysis of air pollution was held in Beijing. Dozens of experts from the National Atmospheric field gathered to discuss and work together to evaluate the management of waste gas. Experts at the meeting agreed that prevention and control of air pollution in China should focus on coal, structure, transportation and scientific research.

Waste gas management:

Experts accurately assess the pulse of air pollution from four aspects of gathering management:

At that time, the problem of air pollution was highly valued. Recently, the frequent occurrence of heavily polluted climate, exactly why it came into being, how well it is managed, and what measures will be more useful in the future, not only public concern, but also scientific researchers in the field of atmosphere are trying to explore. At the beginning of the new year, the Ministry of Environmental Protection convened dozens of experts from the National Atmospheric field to hold an academic seminar to discuss and work together to comment on the prevention and control of air pollution.

Since December last year, the frequent occurrence of heavily polluted climate in Beijing, Tianjin and Hebei has attracted great attention of the society. What is the cause of air pollution that the public is particularly concerned about? What are the most effective ways to eradicate air pollution? From January 17 to 18, five academicians of the Beijing-Tianjin-Hebei Joint Workshop on the Prevention and Control of Atmospheric Pollution and 25 experts of the general expert group, as well as representatives of experts from all parts of the country in various directions of atmospheric research, gathered in Beijing and participated in the academic seminar on the causes, control and trend analysis of air pollution convened by the Ministry of Environmental Protection.

Emission intensity in heating season is much higher than that in non-heating season, and industrial emission is still the largest one.

Experts at the meeting believed that the promulgation and implementation of the "Ten Articles of Atmosphere" would promote the transition of air pollution control from "total amount control" to "quality control", and further promote the rapid decline of China's primary air pollutant emissions. From 2005 to 2010, China's sulfur dioxide emissions decreased by 12.8%. From 2013 to 2015, according to relevant research estimates, besides volatile organic compounds, the emission of major pollutants showed a rapid downward trend.

The emission intensity of Beijing-Tianjin-Hebei region is much higher than that of other regions in China. The emission intensity in heating season is much higher than that in non-heating season, and the primary pollutant emission in Beijing-Tianjin-Hebei region is about 30%.

At present, industrial emissions are the largest sources of SO2, NOX, primary PM2.5 and VOCs in China. Civil emissions are important sources of primary PM2.5, and traffic sources are important sources of NOX and VOCs. Therefore, in the future emission control, it is necessary to strengthen the management methods of non-electric occupations (steel, cement and glass occupations), coal-fired boiler renovation, clean use of civil bulk coal, elimination of yellow standard cars and old vehicles, and management of volatile organic compounds (power processing, storage and transportation occupations), so as to achieve simultaneous reduction of multi-pollutant emissions.

Climate change, characterized by global warming, has aggravated the composition of heavy pollution.

With regard to the causes of air pollution, the experts at the meeting believed that the atmosphere itself had self-purification ability. In the case of relatively low total emissions, atmospheric diffusion could dilute and dissipate atmospheric pollutants, and atmospheric oxidation could effectively degrade and remove atmospheric components. The primary reason for accumulating air pollution is three aspects, namely, primary emission, secondary transformation and meteorological conditions.

Pollutant discharge is the internal cause of atmospheric pollution. At that time, the most important air pollution problem in China was the combined air pollution problem represented by PM2.5 and ozone. Many pollutants in the atmosphere existed at a high concentration level. The key driving force of this phenomenon is the rapid economic growth and urbanization process in China since the reform and opening up. The emissions of particulate matter (PM), sulfur dioxide, nitrogen oxides, volatile organic compounds, ammonia and so on have increased substantially, and they are concentrated in urban-centered areas with high density, which is also the source of frequent air pollution in key Urban Agglomerations in China. Every winter, the residents just need heating, which leads to a significant increase in emissions.

PM2.5 has a disorderly history. Its chemical composition comes from both direct emission and secondary transformation. Understanding the role of chaotic chemical reactions in the formation of atmospheric heavy pollution is very important for the prediction and warning of heavy pollution and the formulation of multi-pollutant cooperative control scheme.

Meteorological conditions are the external causes of atmospheric pollution. Adverse meteorological conditions, such as calm, breeze, high humidity and temperature inversion, will lead to more severe atmospheric pollution on the premise that emissions are basically the same. Climate change, characterized by global warming, makes the atmosphere more stable and aggravates the composition of heavy pollution.

The prevention and control of pollution must grasp four aspects: coal, structure, transportation and scientific research.

At present, China's primary pollutant emissions are still at a high level in the world, and emission reduction still needs to be implemented by a large margin. At the same time, the emission of volatile organic compounds, ammonia and other emissions need to increase efforts to implement efficient emission reduction. To truly achieve scientific pollution control and accurate haze control, we must plan and design air pollution prevention and control programs based on accurate prediction of meteorological conditions, including precise and accurate heavy pollution countermeasures.

Specifically, the experts at the meeting believed that the following four aspects should be strengthened:

The first is to build a clean coal supply system to further promote the efficient and clean use of coal. Useful control of coal consumption planning, starting from the adjustment of terminal power structure, strengthen bulk coal management. In 2030, the intensive use of coal in Beijing, Tianjin and Hebei increased to more than 90%, striving to reduce the proportion of coal in Beijing, Tianjin and Hebei to less than 40% by 2030, and reduce bulk coal in rural areas by more than 50%.

The second is the combination of structural emission reduction and engineering emission reduction.