循环流化床锅炉底渣余热的高效利用  

Efficient Utilization of Waste Heat from Bottom Slag of Circulating Fluidized Bed Boiler

作　　者：李建锋[1] 于斌 丰斌 李健奇 蔡新春 冷杰 孙海军 吕俊复[8] LI Jian-feng;YU Bin;FENG Bin;LI Jian-qi;CAI Xin-chun;LENG Jie;SUN Hai-jun;LYU Jun-fu(China Electricity Council,Beijing 100761,China;Salaqi Power Plant,Beijing Guodian Power Co.,Ltd.,Baotou 014100;Beijing Zhongdian Changfeng Energy Saving Technology Co.,Ltd.,Beijing 100020,China;Beijing Tasson Technology Co.,Ltd.,Beijing 100022,China;Gemeng International Energy Co.,Ltd.,Taiyuan 030002,China;Electric Power Research Insti-tute,State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China;Beijing SPC Environment Protection Tech Co.,Ltd.,Beijing 100142,China;Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国电力企业联合会,北京100761 [2]北京国电电力有限公司萨拉齐电厂,内蒙古自治区包头014100 [3]北京中电长峰节能科技有限公司,北京100020 [4]北京国科天迅科技有限公司,北京100022 [5]格盟国际能源有限公司,太原030002 [6]国网辽宁省电力有限公司电力科学研究院,沈阳110006 [7]北京清新环境技术股份有限公司,北京100142 [8]清华大学热科学与动力工程教育部重点实验室,北京100084

出　　处：《电力学报》2021年第2期95-104,共10页Journal of Electric Power

基　　金：国家自然科学基金项目(U1810126)。

摘　　要：为了提高循环流化床锅炉机组底渣余热利用效率,提出了耦合流化床冷渣器与滚筒冷渣机的底渣余热两级利用系统并建立了该系统效率与发电量计算的数学模型,以某350 MW超临界循环流化床锅炉机组为研究对象,对其进行了性能计算分析。计算结果显示,该系统余热利用效率较高,最低为62%,最高可达96%以上;增加发电量最高可超过3.6 MW。该系统还可以缓解部分机组的凝结水流量不足的问题,对于今后建设大型循环流化床锅炉具有重要作用。In order to improve utilization efficiency of the bottom slag waste heat of circulating fluidized bed boiler units,a two-stage bottom slag waste heat utilization system coupled with a fluidized bed slag cooler and a drum slag cooler is proposed,and a mathematical model for calculating the efficiency and power generation of the system is established.Taking a 350 MW supercritical circulating fluidized bed boiler unit as the research object,the performance calculation and analysis have been carried out.The results show that the waste heat utilization efficiency of the system is relatively high,with a minimum of 62%and a maximum of over 96%.The increasing of power generation can be up to above 3.6 MW.The system can also alleviate the problem of insufficient condensate flow in some units,and will play an important role in the construction of large-scale circulating fluidized bed boilers in the future.

关 键 词：循环流化床锅炉 余热利用 流化床冷渣器 滚筒冷渣机 热效率 两级回收 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]