烧结烟气湿法脱硫脱硝长效稳定关键技术

Key Technologies for Long⁃term Stability of Wet Desulfurization and Denitrification of Sintered Flue Gas

以烧结湿烟气为研究对象,对烧结烟气含湿量影响分析,烟气调质研究、催化剂理化性质研究,并采用数值模拟分析了流场多相混合强化方法,形成了余热驱动脱硫塔浆液冷却脱湿技术和双加热SCR脱硝技术,并自主开发了自清洁凝渣布风盘和多点阵列高效混风装置等专利设备,并应用于实际工程中。经实际工程检验,系统脱湿效果提升近6倍、系统稳定性提升6倍,可实现3年无大修。系统设备寿命提升2倍,设备寿命延长至10年以上。若实现按烟气循环率25%~30%,本技术整体能耗指标、超低排放指标及其他各项技术指标将得到进一步优化。

Taking sintered wet flue gas as the research object,the influence of moisture content in sintered flue gas was analyzed,flue gas conditioning was studied,and the physicochemical properties of catalysts were studied.Numerical simulation was used to analyze the multiphase mixed strengthening method of the flow field,forming the residual heat driven desulfurization tower slurry cooling dehumidification technology and dual heating SCR denitrification technology.Patent equipment such as self⁃cleaning slag distribution plate and multi⁃point array high⁃efficiency air mixing device were independently developed and applied in practical engineering.After practical engineering testing,the dehumidification effect of the system has been improved by nearly 6 times,and the system stability has been improved by 6 times,achieving a 3⁃year no major repair.The lifespan of the system equipment has been doubled,and the lifespan of the equipment has been extended to over 10 years.If the flue gas circulation rate is 25%~30%,the overall energy consumption indicators,ultra⁃low emission indicators,and other technical indicators of this technology will be further optimized.