高频电源在我国电除尘器上的应用及节能减排潜力分析

Application of High Frequency Power Supply for ESP in the Power Industry of China and Its Potential for Energy Saving and Emissions Reducing

分析了电除尘器高频电源节能减排的机理,介绍了国内外高频电源的研究与应用情况,并指出其相对于传统工频电源的优越性。以上海外高桥第三发电有限责任公司8号炉的电除尘器改造为例,介绍了高频电源在1000MW燃煤机组电除尘器上的节能减排效果:在日常运行期间,改造后除尘器出口烟尘排放浓度由42mg/m3下降至17mg/m3,减排59.5%,电除尘器能耗降低71.7%。结合所选案例以及高频电源在其他电厂燃煤机组上成功应用的经验,分析了电除尘器高频电源对我国电力行业节能减排潜力:在2009年电力行业有关统计数据的基础上,若火电行业电除尘器全部进行高频电源改造,每年可节电31.5亿kW.h,相当于节约标准煤107.7万t,可减少120～210万t烟尘排放,1.07万tSO2排放,6462～9693tNOx排放,310万tCO2排放。

The mechanism for energy saving and emissions reducing of High Frequency Power Supply for ESP was analyzed. Its research and application at home and abroad were introduced, and its advantages compared with traditional power supply were pointed out. As one case, the dust-collector retrofit of Unit 8 of Shanghai Waigaoqiao Power Plant was studies for investigating the energy saving and emissions reducing effect. During daily operation after the retrofit of applying High Frequency Power Supply for ESP, the dust emissions decreased by 59.5%, from 42 mg/m3 to 17 mg/m3, and the energy consumption decreased by 71.7%. According to this application case and the successful experience in coal-fired units of other power plants, the potential of energy saving and emissions reducing in the power industry of China was analyzed. On the base of related statistical data from the power industry in 2009, if all the ESP adopted the High Frequency Power Supply, the electricity consumption of the ESP would decrease by 3.15 billion kW·h, equal to saving 1.077 million tons equivalent coal, and the total dust, SO2, NOx, CO2 emissions would decrease by 1.2-2.1 million tons, 10.7 thousand tons, 6.462-9.693 thousand tons, 3.10 million tons ,respectively.