水泥窑炉NO_(x)原位还原超低排放技术及示范  

Cement kiln in-situ reduction denitration ultra-low emission technology and demonstration

作　　者：蔡军[1,2,3] 任强强 欧阳子区[1,2,3] 朱建国[1,2,3] 吾慧星 杨华伟[1] 吕清刚 CAI Jun(Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院洁净能源创新研究院,辽宁大连116023

出　　处：《水泥》2021年第6期45-48,共4页Cement

基　　金：中国科学院战略性先导科技专项(XDA21040300);中国科学院青年创新促进会优秀会员资助项目(Y201642)。

摘　　要：针对水泥窑炉氮氧化物排放标准日趋严格,本文创新性提出了适用于燃煤水泥窑炉的原位还原脱硝技术,该技术具有脱硝效率高、成本低、环保兼容性好、工程现场易实施等优点。中试验证结果显示:原位还原脱硝技术的脱硝效率可达到60%~80%。在此基础上,原位还原脱硝技术在2500 t/d水泥窑炉上进行了工程示范应用。第三方测试结果表明,在较少喷氨量和煤耗略降低条件下,水泥窑炉氮氧化物排放达到80 mg/m^(3)。中试与工程示范结果表明,原位还原脱硝技术用于燃煤水泥窑炉氮氧化物减排是可行的,该技术的提出为水泥工业实现超低排放提供了一条新的技术途径。Aiming at the emission standards of NO_(x)from cement kiln are becoming increasingly strict.This paper innovatively proposed an in-situ reduction denitration technology suitable for coal-fired cement kiln.This technology has such advantages as high denitration efficiency,low cost,good environmental compatibility and easy implementation in engineering site.The pilot-scale results showed that the denitration efficiency of in-situ reduction can reach 60%~80%.On this basis,the in-situ reduction denitration technology has been applied in a 2500 t/d cement kiln.The third-party test results showed that the NO_(x)emission of cement kiln can achieve 80 mg/m^(3)under the conditions of less ammonia injection and no increase of coal consumption.Both the pilot-scale experimental results and the successful engineering demonstration indicated that the in-situ reduction denitrification technology is feasible for NO_(x)emission reduction of coal-fired cement kiln,and provides a new way for cement industry to realize ultra-low emission.

关 键 词：水泥窑炉 NO_(x)减排 脱硝 分解炉 超低排放 

分 类 号：TQ172.625.3[化学工程—水泥工业]