摘要
为了控制燃煤二氧化硫气体的排放,采用智能定硫仪研究了有机钙的脱硫特性.原煤的硫析出速率曲线呈双峰形状,添加有机钙后,硫析出速率明显降低,曲线呈单峰状.1000℃下有机钙对长广煤的脱硫率比普通石灰石高1倍以上,其中醋酸钙镁的脱硫效果高达73.84%.煤的含硫量、反应温度、钙硫比、钙基添加剂粒径是影响有机钙脱硫效果的重要因素.煤的含硫量增大或钙基添加剂粒径减小都可以提高有机钙的脱硫率;随温度升高,高硫煤脱硫率下降幅度低于中硫煤和低硫煤,1 200℃高温下醋酸钙镁脱硫率为59.08%;按钙硫比为1添加有机钙可以获得较高的脱硫率,继续增加钙基添加剂,脱硫率的提高效果不明显.表明有机钙是一种脱硫效率较高的优良吸收剂,醋酸钙镁的脱硫效果最好.
Aim to control the emission of SO2 during coal combustion, desulfurization characteristic of organic calcium was studied by intelligent sulfur determination analyzer. Sulfur releasing curve changed from two ＂peak value＂ to one for addition of organic calcium, with velocity of SO2 release decreasing. Efficiency of sulfur reduction was double when organic calcium was used under 1000℃ compared to limestone, and reduction efficiency of calcium magnesium acetate was 73.84%. Sulfur content, furnace temperature, calcium/sulfur ratio and paticle＇ s diameter were important factors as for desulfurizing rate. Sulfur removal efficiency was improved with coal＇s sulfur content increasing or particle＇s diameter decreasing. Decreasing degree of reduction efficiency lowered with sulfur content increasing as temperature improved. Efficiency remained high level as 59.08% by calcium magnesium acetate at 1 200℃ . Perfect efficiency could be reached as calcium/sulfur ratio being one and augmentation degree was inapparent with more calcium addition. Therefore organic calciums are excellent absorbent for desulfurization and calcium magnesium acetate has best sulfur removal efficiency.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第8期1861-1865,共5页
Environmental Science
基金
国家重点基础研究发展规划(973)项目(2006CB200303)
新世纪优秀人才支持计划项目(NCET-04-0533)
关键词
有机钙
醋酸钙镁
脱硫
organic calcium
calcium magnesium acetate
desulfurization
作者简介
肖海平（1978～），男，博士，讲师，主要研究方向为能源清洁利用，E-mail：dr_xiaohaiping@yahoo．com．cn
