Global EditionASIA 中文雙語Fran?ais
    Business
    Home / Business / Industries

    Clean coal a key ingredient in the battle for more blue skies

    Xinhua | Updated: 2019-10-08 10:44
    Share
    Share - WeChat
    A view of Tian'anmen Square under the blue sky in Beijing, May 6, 2019. [Photo/IC]

    BEIJING - Gao Xiang and his colleagues never pictured coal as a black cloud billowing from smokestacks or a sooty remnant of the Industrial Revolution.

    "There are only unclean technologies; no unclean energy," said Gao, a winner of China's National Awards for Scientific and Technical Progress and a professor at the State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control at Zhejiang University.

    For years, researchers have been seeking to reduce coal's harsh environmental impact with multiple technologies, seeking a "burn cleanly" spell for China's major energy source.

    Coal accounts for over 90 percent of China's proven reserves of fossil energy resources, said Gao.

    China cannot eradicate coal-fired power from its energy mix overnight as natural gas supplies are difficult to access and renewable energy expansion takes time.

    But Chinese citizens are demanding cleaner air, and coal-fired power plants are viewed as the major culprit of PM 2.5, small particles that may damage the lungs.

    Adapting to coal

    Reducing emissions from coal-fired power plants makes up a great part of China's environmental drive and energy security as Beijing sets emissions and efficiency standards for coal-fired power plants which are higher than those in Western countries.

    Coal is widely distributed in China but the overall quality is not high. The diversity of the country's vast geographical coal distribution and the complex combustion features are among the hardest problems to tackle.

    "A clean system must adapt to these 'coal situations'," Gao said.

    At the State Key Laboratory of Clean Energy Utilization at Zhejiang University, Gao and his colleagues have been testing sample packets like coal, fly ash and calcium carbonate from coal-fired power plants across China in order to find the best solution.

    They often work round the clock. A pilot experiment, a preliminary study to evaluate the system, can run for 5,000 hours.

    Climbing and a head for heights are required from everyone in the lab. From 40-meter-high equipment testing platforms to 70-meter tall smokestacks, they must collect data and test their theories.

    Gao's mission has been constant since he began his master's degree in 1990, which is to reduce the emissions of coal-fired plants.

    After more than 20 years of research, Gao and his team developed an ultra-low-emissions system to filter multiple pollutants from coal-fired flue gas quickly and cheaply. This has been successfully applied in a 1,000 MW unit in Jiaxing power plant as China's first demonstration plant.

    Gao's work opened up new fields using multidisciplinary approaches. Through process intensification, each pollutant-control device can simultaneously remove several pollutants, hence increasing the total removal efficiency and reducing emissions from coal-fired utilities to a level even lower than the regulation set for natural gas combustion.

    Delivering on pledges

    Zhejiang Energy Group, which upgraded its power plants with the system, says emissions of sulfur dioxide are down 83 percent against national emissions standards, nitrogen oxides are down 50 percent and particulates 67 percent.

    In January 2018, Gao and his team were awarded first prize in the National Technology Invention Award. The Ministry of Science and Technology said the system had drastically reduced the pollutants emitted by coal-fired power plants nationwide.

    In the global drive against climate change, China has been consistently delivering on its environmental pledges.

    From 2015 to 2017, China's government has highlighted ultra low emissions of coal-powered generation continuously in the Report on the Work of the Government, striking out hard against air pollution.

    The National Energy Administration announced in February that China has established the world's largest clean coal-power generation system, setting a new milestone in cutting emissions and saving energy.

    The country has exceeded its target of ultra-low emissions and energy conservation and transformation outlined in the 13th Five-Year Plan (2016-20) two years in advance.

    By the end of 2018, the capacity of China's coal-powered generators with ultra-low emissions reached more than 810 million kilowatts, accounting for over 80 percent of the country's total installed capacity of coal power generating units, data from the NEA showed.

    "The to-do list for energy and environmental protection never ends. We should always follow China's development and solve problems," said Gao.

    Currently, they are promoting and extending the system for other industries.

    Top
    BACK TO THE TOP
    English
    Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
    License for publishing multimedia online 0108263

    Registration Number: 130349
    FOLLOW US
    CLOSE
     
    黑人无码精品又粗又大又长| 久久久久亚洲AV无码永不| 欧美日韩中文国产一区| 亚洲精品97久久中文字幕无码| 中文字幕一区二区免费| 亚洲色中文字幕无码AV| 久久久91人妻无码精品蜜桃HD| 狠狠躁天天躁中文字幕无码| 久久精品国产亚洲AV无码偷窥| 五月婷婷在线中文字幕观看 | 韩国三级中文字幕hd久久精品 | 中文字幕av无码一区二区三区电影 | 伊人久久无码中文字幕| 国产久热精品无码激情| 天堂√最新版中文在线天堂| 亚洲AV无码一区二区一二区| 日韩AV无码一区二区三区不卡毛片| 人妻丰满熟妞av无码区| 亚洲一区二区三区AV无码| 7国产欧美日韩综合天堂中文久久久久 | 午夜无码A级毛片免费视频| 欧美 亚洲 日韩 中文2019| 成人A片产无码免费视频在线观看| 欧美中文字幕在线| 伊人久久无码中文字幕| 亚洲AV中文无码乱人伦下载| 无码囯产精品一区二区免费| 最近2019年免费中文字幕高清| 天堂在线资源中文在线8| 亚洲AV永久无码一区二区三区| 国产精品无码不卡一区二区三区| 天堂中文字幕在线| 亚洲国产午夜中文字幕精品黄网站 | 日韩精品无码一区二区视频| 中文字幕亚洲无线码| 中文字幕无码高清晰 | AA区一区二区三无码精片| 国产a级理论片无码老男人| 精品无码av一区二区三区| 国产做无码视频在线观看浪潮 | 秋霞鲁丝片Av无码少妇|