| 邱 辉,王鹏飞,骆科吉,禹 元,郭玉海.水泥窑低成本脱硝的超低排放改造技术探讨[J].水泥工程,2026,39(4):20-22 |
| 水泥窑低成本脱硝的超低排放改造技术探讨 |
| Discussion on ultra-low emission retrofit technology for low-cost denitration of cement kilns |
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| DOI： |
| 中文关键词: 分解炉 氮氧化物 超低排放 运行成本 |
| 英文关键词: decomposition furnace nitrogen oxides ultra-low emissions operating cost |
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| 中文摘要: |
| 通过增大预热器分解炉还原区的体积，降低系统初始NOx浓度（不喷氨水时C1出口本底值NOx≤260 mg/m³），再通过mini型高温高尘SCR装置进一步脱除至50 mg/m³以下，达到NOx超低排放标准。探索了水泥窑氮氧化物采取预热器分解炉自脱硝组合mini型高温高尘SCR技术路径的可行性以及经济性。实际改造项目探索式验证了投资成本和运行成本，其中投资成本方面，SCR装置规模因前端NOx减量而缩小，设备及催化剂投资降低约30%；运行成本方面，氨水单耗降低50%以上，年运行成本较单一SCR技术减少约40%；后期SCR催化剂更换量较常规减少一半以上，催化剂更换成本下降30%。 |
| 英文摘要: |
| By increasing the volume of the reduction zone in the preheater calciner, the initial NOx concentration is reduced （the background value of NOx at C1 outlet without ammonia water injection is ≤260 mg/m³）. Then, it is further removed to below 50 mg/m³ through a mini high-temperature high-dust SCR device, achieving ultra-low NOx emission standards. The feasibility and economy of the combined mini high-temperature high-dust SCR technology path for self-denitration of nitrogen oxides in cement kilns using a preheater calciner were explored. The actual transformation project explored and verified the investment cost and operating cost. In terms of investment cost, the scale of the SCR device was reduced due to the reduction of upstream NOx，and the investment in equipment and catalysts decreased by about 30%. In terms of operating cost, the unit consumption of ammonia water decreased by more than 50%, and the annual operating cost decreased by about 40% compared to the single SCR technology. The amount of SCR catalyst replacement in the later stage was reduced by more than half compared to conventional projects, and the catalyst replacement cost decreased by 30%. |
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