摘要
为了探讨菱镁矿应用于火电厂湿法烟气脱硫的可能性,将不同等级菱镁矿加工成200目细粉,加蒸馏水配成质量分数为15%的脱硫剂浆液,在实验室内采用x（SO2）∶x（N2）=1∶570、SO2浓度为5004 mg·m-3的标准气体作为模拟气体进行烟气脱硫实验。研究了不同等级菱镁矿的脱硫性能、浆液pH值对脱硫率的影响。结果表明：随着反应时间的延长,菱镁矿浆液脱硫率逐渐降低;在相同脱硫时间内,不同浆液的脱硫率按菱镁矿等级排序是：一级菱镁矿〉特级菱镁矿〉二级菱镁矿〉三级菱镁矿〉风化石;各种浆液10 min内脱硫率为：特级菱镁矿浆液89%,一级菱镁矿浆液91%,二级菱镁矿浆液77%,三级菱镁矿浆液87%,风化石浆液50%;随着反应时间的延长,脱硫剂浆液pH值逐渐降低;pH值介于4.6~6之间时,浆液脱硫效果良好,脱硫率比较稳定,适用于火电厂湿法烟气脱硫工艺。
In order to study the effect of magnesite taillings on desulfurization efficiency of flue gas in heat-engine plant, different grades magnesite powder were prepared to make 15 mass% desulfurizers slurry with water. The experimental flue gas contained 5004 mg m3 SOi with x（ SO2 ） ： x（ N2 ） = 1： 570. The desulfurization efficiency of different grades magnesite and the effect of pH on desulfurization efficiency were studied. The results show as follow ： Desulfurization efficiency decreases with the extension of reaction time; with the same reaction time, the desulfurization efficiency order of different grades magnesite slurry is ： First grade 〉 Super grade 〉 Second grade 〉 Third grade 〉 Wind fossil; the desulfurization efficiencies within 10 min are： super grade 89% ,first grade 91%, second grade 87%, third grade 77%, and wind fossil 50% ; The pH value of slurry decreases with the extension of reaction time ; the desulfurization is good when pH = 4.6-6.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第2期351-354,共4页
Bulletin of the Chinese Ceramic Society
关键词
菱镁矿
脱硫剂
湿法烟气脱硫
magnesite tailings
desulfurization efficiency
wet flue gas desulfurization
