Comparison of Sino-U.S. Electricity Consumption and SO2 Emissions
Thermal power has always been a major consumer of coal. Its coal consumption accounts for about 50% of the total coal consumption, and it is also a large emitter of atmospheric pollutants. Both sulfur dioxide and nitrogen oxide emissions account for 30% to 40% of total emissions. After ten years of unremitting efforts in the first five years, the power industry has achieved remarkable results in emission reductions. Both sulfur dioxide and nitrogen oxides have fallen more than the national average, and their emission standards have become increasingly stringent, but the public's feeling is that the ambient air quality is Gradually worse. What are the reasons for this contrast? The reason is that the thoughts and methods of emission reduction are not comprehensive enough.
According to the total coal consumption data of the industry in the China Energy Statistics Yearbook 2011, China's coal consumption increased from 1,063 million tons in 2005 to 1,512 million tons in 2010, with an annual growth rate of approximately 8.45%. From 2005 to 2010 During the period, the ratio of coal consumption to total coal consumption was basically stable with little fluctuation, with an average of 48.06%.
According to the data provided by the US Energy Information Administration (EIA), during the period from 2005 to 2010, the US coal consumption increased from 1,065 million tons in 2005 to 1,069 million tons in 2010, basically unchanged. In the period from 2005 to 2010, the proportion of US coal in total coal consumption increased steadily from 90.19% in 2005 to 99.12% in 2010.
Sino-US power sulfur dioxide emissions comparison
From the absolute value of emissions, from 2005 to 2010, China's power sulfur dioxide emissions from 13.5 million tons in 2005 to 9.26 million tons in 2010, the power industry sulfur dioxide emissions by 4.24 million tons, a decrease of about 31.41%.
From the proportion of sulfur dioxide emissions in China's power industry to sulfur dioxide emissions in the country, from 52.96% in 2005 to 42.38% in 2010, a decrease of 10.58%.
According to statistics provided by the US Environmental Protection Agency, between 2005 and 2010, the amount of sulphur dioxide emissions from electricity decreased from 10.34 million tons in 2005 to 5.4 million tons in 2010, and sulfur dioxide in the power industry was reduced by 4.94 million tons, a decrease of approximately 47.78%. From the perspective of the proportion of sulfur dioxide emissions in the power industry as a percentage of total sulfur dioxide emissions in the country, the volatility has grown from 70.87% in 2005 to 68.10% in 2010, which is basically around 70%.
Related issues raised and thought
First, the greater the proportion of coal consumed by electricity, whether the need for tighter control? The electric power industry has always been a big consumer of coal. Its consumption accounts for about 50% of the country's total coal consumption. It also has important tasks in energy conservation and emission reduction. Does this mean that the coal consumption in the power industry must be strictly controlled? On the other hand, in the United States, its electricity consumption has been maintained at more than 90%, and even reached 99%. The environmental quality is obviously better than that of China. This fully shows that the total amount of electricity consumed by coal is not an absolute or major factor causing environmental air quality problems.
Second, the greater the proportion of power sulfur dioxide emissions, the need for tighter control? As a large emitter, China's power industry emissions of sulfur dioxide accounted for about 42% of total emissions. However, in the United States, the emission of sulfur dioxide from electricity has been maintained at about 70% of the total, but the environmental quality has not been affected. This is because the absolute concentration of electricity in the United States consumes coal and solves the problem of coal consumption in non-power industries. In China, with the exception of 48% of coal consumption, 52% of the non-power coal consumption has not been effectively managed. This is the key to the current impact on environmental quality. It also fully shows that under the premise of a decline in the total amount of sulfur dioxide emissions, in order to improve China's environmental air quality, we should pay more attention to the concentration of coal consumption to power generation, and the remaining industries need energy to provide this phenomenon.
Third, the electricity industry coal consumption evaluation system needs to be optimized? From the perspective of the actual environmental quality of the United States, and the consumption of electricity coal and sulfur dioxide emissions from electricity, we consider these two factors together. The larger the ratio of electricity coal consumption to electricity, sulfur dioxide, the better, and it is a prerequisite for the absolute concentration of electricity in coal consumption. Next, stricter requirements are imposed on power desulphurization facilities, so that the gradual reduction of power sulfur dioxide, and the premise of a high level of power sulfur dioxide, will be gradually reduced. Therefore, the coal consumption evaluation system in the power industry needs to be further optimized.
Fourth, the coal consumption evaluation system in the power industry has introduced new concepts.
Considering the above reasons, the author believes that it is necessary to introduce a new concept for the evaluation of coal consumption and emissions in the power industry - "secondary re-comparison," and evaluate "secondary re-comparison" as an important indicator. The "secondary ratio" is the ratio of sulfur dioxide emissions in the power industry to the ratio of coal consumption in the power industry.
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