活性焦脱硫特性及检测方法研究

摘要

In order to evaluate the desulfurization characteristics of activated coke,the effects of flue gas composition on adsorption capacity and the influence of SO2 concentration on adsorption and adsorption rate were studied using differential reaction equipments. The results in-dicated that the adsorption capacity of activated coke increased with the rise of SO2 ,O2 water vapor volume fraction in flue dust,while bed temperature rise reduced the adsorption capacity. The adsorption of activated coke obeyed the model of Bangham adsorption rate. The ad-sorption velocity dropped very quickly when the volume rate of SO2 was higher. So the commercial activated coke with large granular was crushed to 2 mm to 3 mm. The volume rate of SO2 was set to 10000×10-6 in the simulation experiment,the increment of adsorption ca-pacity was below 5% after 4 hours. A four-hour SO2 adsorption could be considered as the adsorption capacity of activated coke.%为评价活性焦脱硫特性，选取现有活性焦，在微分反应装置上考察烟气组分对吸附硫容的影响及SO2浓度对吸附量、吸附速度的影响。试验结果表明：烟气组分中SO2、氧、水蒸汽体积分数增加有利于提高活性焦吸附硫容，而随床层温度的升高，活性焦吸附硫容降低。活性焦吸附符合Bangham吸附速率模型，采用较高SO2体积分数的模拟试验气体，吸附速度衰减很快，将商用大颗粒活性焦破碎至2~3 mm，在SO2为10000×10－6的模拟试验气体工况的条件下吸附，吸附4 h后，其吸附硫容增量小于5%，可将其4 h吸附SO2量作为活性焦的吸附硫容。