| 柴晓东,邹利君,戴文露,李 卓,吴 楠,刘 林,钟务江,陆建刚.水泥工业低成本SCR脱硝技术应用[J].水泥工程,2025,38(2):25-30 |
| 水泥工业低成本SCR脱硝技术应用 |
| Application of low-cost SCR denitration technology in cement industry |
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| DOI： |
| 中文关键词: 水泥窑尾 低成本SCR 联合脱硝技术 超低排放 分级燃烧 |
| 英文关键词: cement kiln end low-cost SCR combined denitration technology ultra-low emissions staged combustion |
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| 中文摘要: |
| 本文针对水泥行业氮氧化物超低排放的环保技术需求，系统分析了传统SNCR脱硝技术（通过增加氨水投加量等方式）在新型排放标准下面临的效能瓶颈。通过对比研究水泥窑尾多级协同脱硝技术体系的技术特征与工程适配性，创新性地提出一种满足超低排放要求的经济型SCR协同脱硝技术方案。基于对已实施项目的对比分析，验证了该技术在脱硝效率与运行经济性的双重优势：采用新型催化反应器布置方案后，系统整体脱硝效率达到或超过传统四层催化剂（3+1）配置水平。工程实践数据显示，在确保尾气NOx浓度稳定控制在＜50 mg/m³（基准氧含量10%）且氨逃逸浓度＜5 mg/m³的工况下，20%浓度氨水单位熟料消耗量可优化至＜3kg/t，显著降低运行成本。 |
| 英文摘要: |
| This study addresses the technical requirements for ultra-low nitrogen oxide emissions in the cement industry, conducting a systematic analysis of the performance limitations encountered by conventional SNCR (Selective Non-Catalytic Reduction) denitration technology (including ammonia solution dosage enhancement) under updated emission standards. Through comparative investigation of the technical characteristics and engineering compatibility of multi-stage collaborative denitration systems for cement kiln exhaust, we innovatively propose an economically viable SCR (Selective Catalytic Reduction)-integrated denitration solution compliant with ultra-low emission specifications. Comparative analysis of implemented projects demonstrates the dual advantages of this technology in both denitration efficiency and operational economy: The optimized catalytic reactor configuration achieves system-wide denitration performance equivalent to or exceeding conventional four-layer catalyst arrangements (3+1 configuration). Field operational data confirm that under stable operating conditions with flue gas NOx concentrations maintained below 50 mg/m³ (at 10% O₂ reference) and ammonia slip concentration under 5 mg/m³, the consumption rate of 20% concentrated ammonia solution of clinker can be optimized to less than 3 kg/t, representing significant operational cost reductions. |
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