Analysis of dust removal status of coal-fired power stations in China来源： 作者: 阅读：105594 网友评论2条 Updated: 2010-08-20 14:21 Source: Author: Read: 105,594 User Reviews 2
At present, China's thermal power plants emit about 3.6 million tons of soot each year, accounting for 35% of the country's industrial soot emissions. Among them, fine dust particles (less than 10 microns) are the main factors affecting urban air quality and visibility and seriously endanger human health, with emissions exceeding 2.5 million tons. In order to effectively curb pollutant emissions and improve air quality, the "Environmental Pollutant Emission Standards for Thermal Power Plants" promulgated and implemented by the State Environmental Protection Administration on January 1, 2004 have strict regulations on smoke, dust, sulfur dioxide, and nitrogen oxide emission limits. By 2010, coal-fired power stations are required to meet emission standards of ≤50mg / Nm3 according to regions and time periods. Some provinces and cities such as Guangdong, Beijing, Tianjin, and Nanjing have implemented emission standards of ≤30mg / Nm3 in advance. The Ministry of Environmental Protection issued a consultation draft for the new emission standard of ≤30mg / Nm3 to the society in 2009, and will soon implement a higher emission standard. In recent years, the Chinese government has vigorously promoted the "energy saving and emission reduction" policy, which aims to save energy and reduce environmental pollution caused by harmful gases and dust.
Huadian International Zouxian Power Plant
China's coal-fired boilers have been generally equipped with electrostatic precipitators since the 1980s. Due to the limitations of China's economic development level and environmental protection conditions at the time, the state stipulated that its dust emission concentration should be less than 200 mg / Nm3; Promote the implementation of energy conservation, emission reduction and environmental protection policies. Coal-fired power stations have adopted measures of “upgrading and reducing pressure” to enable more efficient 300MW and above generating units to be effectively promoted. However, the dust removal equipment of coal-fired power plants with 600MW and above units is still mainly based on electric dust collectors. With the continuous improvement of China's environmental protection requirements, conventional dust removal technologies are facing new challenges.
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