中文摘要：

源自燃煤电厂的汞排放已经受到全世界的广泛关注,采取主动措施对其进行控制已成为主要的汞减排手段之一.文献资料表明,燃煤电厂的飞灰对烟气中的汞有一定的吸附脱除作用,但脱除效果因煤种不同导致差异很大,而活性炭对汞有较好的吸附脱除效果.本文采用燃烧调整和优化（CMO）技术以及活性炭喷射（ACI）方法控制和脱除一台美国现役燃煤电厂锅炉（250MWe）燃用低汞和高汞含量煤时烟气中的汞,并对其空气预热器入口和静电除尘器出口烟气中的汞浓度同时使用安大略湿法（OHM）和半连续排放监控系统（SCEM）两种检测方法进行监测,计算了对总汞的脱除效率,得到了该锅炉烟气中的总汞浓度及其脱除率与活性炭喷射量的关系.

英文摘要：

Mercury（Hg）emission from coal-fired power plants has attracted worldwide attentions.Main removal means have been oriented to active control methods.Literatures indicated that the fly ash from coal combustion had restricted mercury sorption capacity depending on the different coal rank.Injection of activated carbon（ACI）upstream of an electrostatic precipitator and combustion modifications and optimization（CMO）for boiler are convenient and economical retrofit control technologies that have potential applications to a large portion of all coal-fired power plants in the world that are not equipped with air pollution control devices,such as flue gas desulfurization scrubbers and nitride oxides selective catalytic reduction equipments.During CMO and ACI to remove mercury from the flue gas,experiments were done for a tangentially fired furnace with the capacity of 250MWe at a full-scale coal-fired power plant in Massachusetts,USA when the Eastern low-Hg coal and the Far East high-Hg coal were burnt.Mercury emissions were determined simultaneously by Ontario Hydro Method（OHM）and Semi-Continuous Emission Monitors（SCEM）at the air preheater（APH）inlet and the electrostatic precipitator（ESP）outlet.Removal efficiency for mercury total was calculated based on the experiments.Mercury total concentrations and removal efficiencies for the unit were also exponentially expressed with the ACI quantities.