Harbin has completely banned the sale of bulk coal. Why?

Harbin completely bans the sale of loose coal, because it protects the environment and reduces pollution. With the development of economy and industry, the atmospheric environmental problems in China are becoming more and more serious. The persistent smog weather in many parts of the country has aroused widespread concern. At present, the scope of air pollution has expanded from local to regional, and it has developed into a compound pollution of urban and regional pollution. The transportation of pollutants between cities is becoming more and more obvious, and its influence is getting deeper and deeper. This is one of the important challenges of air pollution control and management.

The winter in Northeast China is cold and long, and the air pollution is very serious under the inversion weather. Harbin's unique geographical location and climatic conditions determine that the atmospheric stratification is stable in winter and it is easy to form an inversion layer. Air pollution is serious in autumn and winter, which seriously affects residents' travel and life. Harbin relies on coal energy consumption to achieve economic growth. A large amount of coal energy consumption leads to a rapid increase in air pollutant emissions, reaching or even exceeding the self-purification ability of the environment. Winter in Harbin is long and cold, and the wind is weak. It is not conducive to the diffusion of air pollutants. The air pollutants in Harbin mainly come from fuel burning, straw burning, automobile exhaust and ground dust. Due to the specific climatic conditions in Harbin, the heating time in winter is as long as half a year, and the pollutants emitted by thermal power plants and civil loose coal have seriously affected the atmospheric environment. ? During the heating period, the running speed of motor vehicles decreases and the idle time becomes longer, which makes the exhaust emission of motor vehicles during the heating period higher than that during the non-heating period.

Harbin completely banned the sale of loose coal, which solved the problem of environmental pollution from the source to some extent. Civil loose coal is a kind of civil loose coal, which is widely used in small boilers, household heating and catering industry. Winter has always been the main energy source for heating in cities and rural areas in northern China. Its price is low, but the ratio of ash to sulfur is high. When burning civil loose coal, it will produce a lot of harmful substances, such as particulate matter, SO2, hydrocarbons and so on. These pollutants will produce a series of chemical reactions in the atmosphere, resulting in secondary pollutants. A large amount of untreated flue gas is directly discharged into the atmosphere from low altitude, which seriously harms the environment and human health. With the country's concern for the atmospheric environment, the emission standards of fixed and mobile sources of fossil fuels are more stringent, and some thermal power plants have reached ultra-low emission standards. With the decrease of other pollution sources, the harm of civil loose coal to the atmospheric environment is prominent, especially in the case of poor atmospheric diffusion conditions, the combustion of civil loose coal will seriously affect the regional atmospheric environment. The introduction of this policy is conducive to reducing environmental pollution.