What is clean coal?

Clean coal is an important greenhouse gas. With the soaring price of coal, researchers have accelerated the pace of research on clean energy, trying to find a way to turn black dirty energy-coal into green clean fuel. To realize the transformation from coal to green energy, researchers also need to solve the technical problem of zero carbon emission, which is a long-term goal of clean coal.

Coal is the cheapest and richest fossil energy, and coal on the earth can also provide us with energy supply for hundreds of years. The problem is that in a few years, the carbon dioxide (CO2) released by burning coal may make our planet no longer suitable for human habitation.

Carbon dioxide produced by coal burning is an important greenhouse gas, which is considered to be the chief culprit of climate warming. Researchers are exploring solutions-that is, converting coal into electricity and achieving zero carbon dioxide emissions.

Traditional coal development and utilization will destroy the environment and pollute the atmosphere, but if it is improved in the process of mining, transportation, use and transformation, especially if coal-fired power plants achieve ultra-low emissions, reaching or lower than the emission standards of gas-fired power plants, it will become clean energy.

Extended data:

Present situation of clean coal in China

By the end of the third quarter of 20 18, China's coal-fired generating units had completed the transformation of over 700 million kilowatts with ultra-low emission, exceeding the overall goal of 580 million kilowatts ahead of schedule. Coupled with the newly-built ultra-low emission coal-fired power units, China's coal-fired power units have reached the ultra-low emission limit of more than 750 million kilowatts, accounting for more than 75% of all coal-fired power units.

A total of 650 million kilowatts of energy-saving renovation was completed, accounting for more than 65% of all coal-fired power units, of which 350 million kilowatts were completed during the 13 th Five-Year Plan period, exceeding the target of 340 million kilowatts in the 13 th Five-Year Plan period ahead of schedule. "The total target of ultra-low emission of coal-fired power and energy-saving transformation was completed two years ahead of schedule, which indicates that China has built the world's largest clean coal-fired power supply system." The relevant person in charge of the Electric Power Department of the National Energy Administration said.

Ultra-low emission of coal-fired power has made great contributions to the improvement of atmospheric environment. Zhu Fahua, president of the National Academy of Environmental Protection, cited a set of data: the contribution rate of ultra-low emission transformation of coal-fired power plants to the annual average concentration reduction of fine particles in key areas such as the Yangtze River Delta, the Pearl River Delta and Beijing-Tianjin-Hebei is 24%, 23% and 10% respectively. "

At present, soot (particulate matter), sulfur dioxide and nitrogen oxides emitted by coal-fired power units account for 3.3%, 13.7% and 9. 1% of the total national emissions, respectively. Tang Fei, deputy chief engineer of the Electric Power Planning, Design and Research Institute, believes that the emission intensity of coal-fired pollutants in China is declining, and the total amount of emissions has been effectively controlled. Coal-fired electricity is no longer the main factor causing environmental pollution.

At present, the ultra-low emission energy-saving transformation technology of coal-fired power in China is relatively mature. Take Unit 3 of Taizhou Power Plant, the world's first million kilowatt ultra-supercritical secondary reheat coal-fired generator set, as an example, its power generation efficiency reaches 47.82%, making it a benchmark in the global coal-fired power field. The coal consumption of power supply in 20 18 years is 264.78 g/kwh, which is also the best level of coal-fired power units in China.

Baidu encyclopedia-clean coal

China Net-China has built the world's largest clean coal-fired power supply system, and coal-fired power emissions have dropped by 80% in five years.