Control strategies of atmospheric mercury emissions from coal-fired power plants in China
Control strategies of atmospheric mercury emissions from coal-fired power plants in China
复制标题
我国燃煤电厂大气汞排放控制策略
DOI：
10.1080/10962247.2012.663733
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发表时间：
2012-03
影响因子：
2.7
通讯作者：
Chai, Fahe
中科院分区：
文献类型：
--
作者：
Qu, Yiping;Hao, Jiming;Xue, Zhigang;Chai, Fahe
煤炭向大气排放的汞（Hg）是人为排放和污染的主要来源之一。中国是世界上少数几个煤炭消费量占一次能源总量70%左右的国家之一，其中一半以上的煤炭直接用于发电。燃煤电厂的大气汞排放及其形态备受关注，因为它们对区域人类健康和生态系统风险以及长途运输产生负面影响。本文根据锅炉、颗粒物（PM）和二氧化硫（SO2）控制装置的不同子类别，通过整合各电厂的煤炭消耗和排放因子，评估了2000-2007年期间中国燃煤电厂大气汞排放及其物种划分的最新趋势。研究结果表明，虽然煤炭消耗量从1213.8吨稳步增长到1532.4吨，但燃煤电厂汞排放总量已开始从2005年的峰值139.19吨下降到2007年的134.55吨，这主要归因于静电除尘器/织物过滤器（ESP/FF）和湿烟道的汞减排协同效益天然气脱硫（WFGD），尤其是 2005 年以来新建和现有电厂 WFGD 的安装量急剧增加。在未来的十二五计划中，越来越多的电厂将被要求安装脱氮氧化物（氮氧化物）系统（主要是选择性催化还原[SCR]和选择性非催化还原[SNCR]），以最大限度地减少 NOx 排放，吨煤汞比排放率将进一步下降。 SCR + ESP/FF + WFGD 系统组合的协同效益去除效率。因此，SCR+ESP/FF+WFGD配置将成为近期我国燃煤电厂汞减排的主要途径。然而，从长远来看，为了进一步减少元素汞排放，需要先进的特定汞去除技术。影响 燃煤电厂大气汞排放控制因其对区域环境和人类健康风险以及长途运输的不利影响而引起人们的高度关注。了解燃煤电厂汞排放的现状，对于中国决策者制定经济有效、切实可行的汞减排法规和政策具有重要意义。本研究提供了燃煤电厂大气汞排放的近期趋势，并据此提出了未来燃煤电厂大气汞排放的初步综合控制策略建议，有助于相关政策的制定，最大限度地降低我国环境和人体健康的有害风险。
Atmospheric mercury (Hg) emission from coal is one of the primary sources of anthropogenic discharge and pollution. China is one of the few countries in the world whose coal consumption constitutes about 70% of total primary energy, and over half of coals are burned directly for electricity generation. Atmospheric emissions of Hg and its speciation from coal-fired power plants are of great concern owing to their negative impacts on regional human health and ecosystem risks, as well as long-distance transport. In this paper, recent trends of atmospheric Hg emissions and its species split from coal-fired power plants in China during the period of 2000–2007 are evaluated, by integrating each plant's coal consumption and emission factors, which are classified by different subcategories of boilers, particulate matter (PM) and sulfur dioxide (SO2) control devices. Our results show that the total Hg emissions from coal-fired power plants have begun to decrease from the peak value of 139.19 t in 2005 to 134.55 t in 2007, though coal consumption growing steadily from 1213.8 to 1532.4 Mt, which can be mainly attributed to the co-benefit Hg reduction by electrostatic precipitators/fabric filters (ESPs/FFs) and wet flue gas desulfurization (WFGD), especially the sharp growth in installation of WFGD both in the new and existing power plants since 2005. In the coming 12th five-year-plan, more and more plants will be mandated to install De-NOx (nitrogen oxides) systems (mainly selective catalytic reduction [SCR] and selective noncatalytic reduction [SNCR]) for minimizing NOx emission, thus the specific Hg emission rate per ton of coal will decline further owing to the much higher co-benefit removal efficiency by the combination of SCR + ESPs/FFs + WFGD systems. Consequently, SCR + ESPs/FFs + WFGD configuration will be the main path to abate Hg discharge from coal-fired power plants in China in the near future. However, advanced specific Hg removal technologies are necessary for further reduction of elemental Hg discharge in the long term. Implications Controlling of atmospheric Hg discharge from coal-fired power plants have aroused great concerns for its adverse impacts on regional environment and human health risks, as well as long-distance transportation. It is of great significance for Chinese decision makers to be aware of the current status of Hg emissions from coal-fired power plants, so that the regulations and policies regarding Hg abatement can be made that are cost-effective and feasible implementation. This study provides the recent trend of atmospheric Hg emissions from coal-fired power plants, and accordingly proposes the preliminary comprehensive Hg control strategies suggestion in the future, which will be helpful for relevant policy making to minimize the harmful risks on environment and human health in China.
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影响因子：
11.4
作者：
Pavageau, MP;Pécheyran, C;Donard, OFX
通讯作者：
Donard, OFX
DOI：
--
发表时间：
2001
期刊：
Coal Geology of China
影响因子：
--
作者：
Zhuang Xin
通讯作者：
Zhuang Xin
影响因子：
11.4
作者：
Ye Wu;Shuxiao Wang;D. Streets;J. Hao;M. Chan;Jingkun Jiang
通讯作者：
Ye Wu;Shuxiao Wang;D. Streets;J. Hao;M. Chan;Jingkun Jiang
DOI：
10.1177/0032885598078003008
发表时间：
1998-09
期刊：
The Prison Journal
影响因子：
--
作者：
Irina Simonovska;I. Mateescu;V. Manolache
通讯作者：
Irina Simonovska;I. Mateescu;V. Manolache
影响因子：
7.5
作者：
C. Senior;J. Helble;A. Sarofim
通讯作者：
C. Senior;J. Helble;A. Sarofim