2015年第1期（总第205期）
doi:10.3969/j. issn.1009 3230.2015.01.005
应用能源技术
增加石灰石的量对CFB锅炉性能的影响
王晓龙'，李寒冰12
（1.国网河北电力公司电力科学研究院，石家庄050021： 2.华北电力大学能源动力与机械工程学院，河北保定071003）
摘要：循环流化床锅炉（CFB)具有良好的环保特性且燃料适用性广，直接向锅炉内投入脱硫剂是目前CFB锅炉最常用的也是最有效的脱硫方法之一，所用到的脱硫剂为石灰石。石灰石投入量的多少对锅炉的燃烧产物、锅炉效率和污染物的排放有一定的影响。通过对某台 300MW的循环流化床锅炉的试验研究，对实测数据进行分析，结果显示：随着石灰石量的增加脱硫效率提高，NO，的浓度增加，相对SO，而言，变化趋势较平缓；同时，灰渣量和飞灰量有一定程度的增加，使得物理热损失增加，锅炉效率降低了0.5~1.2个百分点。
关键词：循环流化床锅炉；脱硫；石灰石；燃烧产物；锅炉效率；污染物排放
文章编号：10093230(2015)01-0015-04
中图分类号：TK229.6文献标志码：A
15
InfluenceofCFBBoilerPerformancewiththeLimestoneIncrease
WANG Xiao long',LI Han bing.-2
(1. Hebei Electric Power Research Institute, Shijiazhuang 050021, China; 2.School of Energy Power and Mechanical Engineering,North China Electric
PowerUniversity，Baoding071003,HebeiProvince，China)
Abstract: CFB boiler has many characteristics, for example, the environmental performance and wide applicability of fuel. Desulfurizer is invested directly into the boiler is one of the most commonly and most effective method of desulfurization is used on CFB boiler. Limestone is the desulfurizer. Amount of limestone into the boiler that it impacts combustion products, boiler efficiency and emissions of pollutants of the boiler. Under the experimental research on a 300 MW CFB boiler, and analysis on the measured data,we can get some conclusions: first, With the increase of the amount of limestone, The desulfurization efficiency was increased, also the concentration of NO,, but compared with SOz, the trend of concentration of NO, is less flat. Second, the amount of ash and fly ash has been increased, Cause the loss of physical heat is increased, and the boiler efficiency is increased 0.5%~1.2%.
Key words: CFB boiler; Desulfurization; Limestone; Burm product; Boiler efficiency; Contaminant emission
0引言
循环流化床燃煤锅炉（CFB）具有效率高、燃料适用性广、负荷调节灵活、环保性能好等特
收稿日期：2014-1115
修订日期：2014-1219
作者简介：王晓龙（1983-），男，河北保定人，硕士，工程师，
主要从事火电厂仿真、脱硫及相关技术的研究。
万方数据
点1]。直接向炉内添加脱硫剂是目前CFB锅炉炉内脱硫最常用、最经济的方案，故自上世纪80 年代循环流化床锅炉发展至今，炉内添加脱硫剂一直受到亲崃。石灰石作为目前常用的脱硫剂之一，与煤粉按比例混合进入炉膛参与燃烧，通过石灰石缎烧、分解出的CaO，吸收煤粉燃烧产生的 SO2，从而达到脱硫的目的。