熔铝炉冶炼烟气脱硝技术现状与进展

随着中国铝制品生产及消费量的增长，铝及铝加工行业处于快速发展阶段。熔铝炉是铝加工冶炼过程中重要的高温生产设备，其烟气具有氮氧化物(NO_x)浓度较高、烟气量小、波动性大等特点，进一步加大了烟气环保治理的难度。熔铝炉烟气脱硝治理正处于起步阶段，相关的污染物排放标准仍在不断更新和完善。综述了低氮燃烧技术以及湿法脱硝、选择性非催化还原脱硝(SNCR)、选择性催化还原脱硝(SCR)等主要脱硝技术的特点和优缺点，介绍了现有的熔铝炉烟气脱硝技术，并对熔铝炉烟气脱硝技术的研究重点及工业化应用前景进行展望。

Status and progress of flue gas denitration technology in aluminum smelting furnace

With the growth of production and consumption of aluminum products in China, aluminum and aluminum processing industry is in the stage of rapid development. Aluminum smelting furnace is an important high temperature production equipment in the aluminum smelting process. The flue gas produced by aluminum smelting furnace has the characteristics of high concentration of nitrogen oxides (NO_x), small smoke volume and large fluctuation, which further increases the difficulty for environmental protection treatment of the flue gas. Denitration governance of the flue gas is in its infancy, and the relevant standards for pollutants discharge is still in constantly to be updated and improved. The characteristics, advantages and disadvantages of low nitrogen combustion technology, wet denitration, selective non-catalytic reduction(SNCR), selective catalytic reduction(SCR) and other major denitrification technologies are reviewed, and the existing flue gas denitration technologies in aluminum smelting furnace are introduced. The research focuses and industrial application prospect of flue gas denitration technology for aluminum melting furnace are also prospected.