600MW超临界循环流化床锅炉脱硫系统设计  

Desulfurization System Design of 600 MW Supercritical Pressure CFB Boiler

作　　者：李志伟[1] 张凯 

机构地区：[1]集美大学福建省清洁燃烧与能源高效利用工程技术研究中心 [2]镇江市电站辅机厂有限公司

出　　处：《电站系统工程》2012年第6期51-52,55,共3页Power System Engineering

基　　金：福建省科技计划重点项目资助(2006H0088);福建省科技创新平台项目资助(2009H2006)

摘　　要：以收到基含硫量为2.47%、低位发热量为19.93 MJ/kg的烟煤为燃料,完成了600 MW超临界循环流化床(CFB)锅炉的脱硫系统设计。锅炉设置两个有效容积为380 m3的石灰石粉仓,布置在炉膛的两侧。每个石灰石粉仓下部设置两套单台出力为5 kg/s的石灰石粉输送装置,石灰石粉采用压缩空气输送,固气比为7 kg/kg,石灰石粉经返料管进入炉膛。锅炉的钙硫比为2.2,脱硫效率为95%,脱硫后SO2的排放浓度为347mg/Nm3,能够实现SO2达标排放。Burning bituminous coal with sulfur 2.47% as received basis,and low heating value 19.93MJ/kg,the 600MW supercritical pressure circulating fluidized bed（CFB） boiler desulfurization system was designed.Two limestone powder silos,with volume of 380m3 each,are on the two sides of the furnace.There are two pneumatic conveying equipments with powder to air ratio of 7 kg/kg and conveying capacity of 5 kg/s for each equipment.The limestone powder is injected into the furnace through the recirculating ash return legs.The desulfurization rate is 95% under the condition of Calcium to Sulfur ratio of 2.2,and the SO2 emission is 347 mg/Nm3,lower than the permission limit.

关 键 词：CFB锅炉 输送装置 脱硫系统 石灰石粉仓 钙硫比 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]