气体再燃技术在宝钢电厂350 MW锅炉机组上的工业应用

煤炭是我国电力工业的主要燃料,大量煤炭在燃烧中对环境造成了极大的破坏,尤其是氮氧化物对环境的污染非常严重。作为一种有效且前景看好的降低NOx排放的技术,气体再燃在宝钢电厂的锅炉改造中得到了应用,并取得了令人满意的效果。NOx的排放浓度可以达到155mg／m^3,为国内300MW以上机组的最好水平。再燃量为10％左右,再燃区过量空气系数取0．9即能取得很好的效果。随着“西气东输”工程的完成,应用天然气再燃大幅度降低燃煤电厂造成的NOx污染,是合理使用天然气这一优质清洁能源的良好途径。

The Industrial Application of Gas Reburning Technology in a 350 MW Boiler Unit at Bao Steel Works Power Plant

Coal as a main fuel used in the power generation industry of China has led to extremely serious environmental pollution,especially by NO_x emissions resulting from the burning of an enormous quantity of coal.The use of gas reburning technology for the effective and highly promising reduction of NO_x emissions has been successfully implemented during the modification of boilers at Bao Steel Works power plant with an emission concentration of NO_x of 155 mg/m~3 being attained.The latter is the best result not achievable in China for power units of 300 MW or higher.At a reburning rate of about 10% and the excess air factor of the reburning zone selected at 0.9 excellent results can be obtained.With the completion of the project "natural gas in the west to be transported to the eastern regions" the use of natural gas for reburning can drastically reduce the NO_x emissions-related pollution caused by coal-burning power plants,initiating a good approach for the rational application of natural gas as a high-quality and clean energy source.