水泥低能耗先进烧成技术研究与应用  

Research and Application of the Cement Low-energy Consumption Burning Technology

作　　者：马娇媚[1] 彭学平[1] 狄东仁[1] 赵亮[1] 陈昌华[1] 李波[1] 王伟[1] MA Jiaomei;PENG Xueping;DI Dongren;ZHAO Liang;CHEN Changhua;LI Bo;WANG Wei(Tianjin Cement Industry Design & Research Institute Co., Ltd. , Tianjin 300400)

机构地区：[1]天津水泥工业设计研究院有限公司,天津300400

出　　处：《水泥技术》2019年第3期21-28,共8页Cement Technology

摘　　要："第二代新型干法水泥生产线技术与装备的研究开发"科研项目2012年正式立项以来,水泥低能耗烧成技术获得突破性进展。采用各向异性处理的雷诺应力模型,研究了旋风筒的分离效率、降阻以及预热器的换热机理,研发了弱涡旋低阻旋风筒、多级重构组合预热器,预热器出口温度≤260℃,压力≤5 200Pa。自主研发的分解炉计算机辅助试验平台,解决了计算机仿真开发中圆柱坐标非结构网格下极点处理这一国内外公认的技术难题,实现了流畅场、颗粒场、温度场、组分场360°全场模拟,利用该模型研发的自脱硝梯度燃烧分解炉结合脱硝风管,通过三次风分风的方式可实现脱硝50%以上,SNCR氨水用量可降低到0.6m^3/h以下。冷却机三维仿真技术能定性指导研发工作,多孔介质传热模型可以定性研究取风口的位置和形状,该部分工作为原创性工作,国内外尚无报道。优化的第四代冷却机总鼓风量1.872 0m^3(标)/kg熟料,热回收效率～75%,中置辊式破碎机冷却机余热发电量达18k Wh/t熟料。集成应用技术的水泥窑系统,达到了热耗2 694.0k J/kg熟料,自脱硝效率≥50%,与能耗限额标准新建企业的准入值相比节煤率10%以上。以M厂2×5 500t/d两条生产线为例,年可节省标煤5.82万吨,余热回收发电9 075×10~4k Wh,减排CO_2～15.8万吨,实现NOx减排～1 000t,新增利润1亿元。单项技术用于技改项目中,实现了提产、节能和减排。Since the scientific research project of "Research and Development of Technology and Equipment for the Second Generation New Dry Process Cement Production Line" was officially launched in 2012, breakthroughs have been made in low energy consumption burning technology of cement. Reynolds stress model with anisotropic treatment was used to study the separation efficiency, pressure reduction and heat transfer mechanism of the cyclone. A combined preheater with weak vortex and low resistance and multi-stage reconstruction was developed. The outlet temperature of the preheater was less than 260℃ and the pressure was less than 5 200Pa. The self-developed CFD test platform for calciner solves the well-known technical problem of pole processing under unstructured grid in cylindrical coordinates in computer simulation development, realizes 360° full-field simulation of flow field, particle field, temperature field and component field. The self-denitrification gradient combustion decomposition furnaces developed by this model and denitrification air ducts can pass through three tertiary air distribution. The amount of ammonia in SNCR can be reduced to less than 0.6m^3 / h. The three-dimensional simulation technology of the cooler can qualitatively guide the research and development work. The porous medium heat transfer model can qualitatively study the position and shape of the air intake. This part of the work is original work, which has not been reported at home and abroad. The optimized total blast volume of the fourth generation cooler is 1.872 0 Nm^3/ kg clinker, the heat recovery efficiency is up to 75%, and the residual heat power generation of the cooler of the middle roller crusher is up to 18 kWh/t clinker. The cement kiln system with integrated application technology achieves 2 694.0kJ/kg clinker with self-denitrification efficiency of more than 50%, and coal saving rate is more than 10% compared with the admittance value of new enterprises according to energy consumption quota standard. Taking the 2×5 500t/

关 键 词：六级预热器 自脱硝 低能耗 烧成技术 节能减排 

分 类 号：TQ172.622.29[化学工程—水泥工业]