钠法与钙法焦炉烟气旋转喷雾脱硫特性对比  

Characteristic Study on Calcium and Sodium Based Spray-dry Desulfurization of Coke Oven Gas

作　　者：周昊[1] 陈建中[1] 周明熙[1] 程明[1] 倪建东 羊韵 徐建 陈活虎 ZHOU Hao CHEN Jianzhong ZHOU Mingxi CHENG Ming NI Jiandong YANG Yun XU Jian CHEN Huohu(State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China Shanghai Baosteel Energy Tech Co. , Ltd. , Shanghai 201999, China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室,杭州310027 [2]上海宝钢节能环保技术有限公司,上海201999

出　　处：《动力工程学报》2017年第10期848-854,共7页Journal of Chinese Society of Power Engineering

基　　金：国家重点基础研究发展计划资助项目(2015CB251501)

摘　　要：在旋转喷雾脱硫(Spray Drying Absorber,SDA)实验台上对低含湿量、高烟温的模拟焦炉烟气进行了脱硫实验,研究高入口烟气温度、高绝热饱和温差条件下,Na_2CO_3和Ca(OH)_22种脱硫剂的脱硫特性.讨论了化学计量比、脱硫塔入口烟温、绝热饱和温差和脱硫塔内烟气温降对脱硫效率的影响.结果表明:随化学计量比的增大,Na_2CO_3脱硫效率增长速率比Ca(OH)_2脱硫效率增长速率更快,当2种脱硫剂与SO_2的化学计量比分别达到1.1和1.5时,脱硫效率趋于平缓;脱硫效率随绝热饱和温差的增大呈指数形式下降;在保持出口烟气温度不变条件下,提高入口烟气温度有利于提高脱硫效率;脱硫塔内烟气温降增大也有利于提高脱硫效率.Desulfurization tests were conducted on the simulated coke oven gas with low humidity and high temperature in a spray drying absorber,so as to study the desulfurization characteristics of agents Na2CO3 and Ca（OH）2at high inlet gas temperatures and far approach to adiabatic saturation temperature（AAST）,and to analyze the effects of following factors on the desulfurization efficiency,such as the stoichiometric ratio（SR）,inlet gas temperature,AAST and gas temperature drop,etc.Results show that as the stoichiometric ratio increases,the desulfurization efficiency of Na2CO3 grows faster than that of Ca（OH）2,and when the stoichiometric ratio of Na2CO3 to SO2 and Ca（OH）2 to SO2 gets up to 1.1 and 1.5,respectively,the desulfurization efficiency tends to be stable.The spray-dry desulfurization efficiency decreases exponentially with the increase of AAST.Keeping the outlet gas temperature constant,the desulfurization efficiency can also be improved by raising the inlet gas temperature.Increasing the gas temperature drop is also beneficial to the desulfurization efficiency.

关 键 词：旋转喷雾脱硫 焦炉烟气 蒸发速率 化学计量比 绝热饱和温差 

分 类 号：X701[环境科学与工程—环境工程]