活性焦固定床的吸附过程和穿透曲线预测  

Adsorption Processand Prediction of Breakthrough Curvein Fixed Bed of Activated Coke

作　　者：程文煜 邢德山 樊腾飞 阎维平[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003 [2]国电科学技术研究院,江苏南京210000

出　　处：《电力科学与工程》2015年第2期1-5,共5页Electric Power Science and Engineering

基　　金：国家高技术研究发展计划863专项经费资助项目(2009AA05Z310)

摘　　要：活性焦干法脱硫是一种先进的烟气脱硫技术,而研究一种适合其工程放大应用的穿透曲线预测模型具有很高的参考价值。基于线性吸附等温线方程,并采用浓度分布的近似解,得到了便于应用的穿透曲线的计算方法。以某活性焦固定床为例,计算了其理论和实际穿透时间,计算发现实际穿透时间远远小于理想穿透时间,有必要在活性焦固定床设计时予以计算分析,并选用合适的穿透时间,根据实际穿透时间进一步计算出其穿透曲线及床层利用率。同时分析了SO2入口浓度、烟气流速因素对固定床穿透曲线的影响,发现SO2入口浓度和烟气流速的适当增加,有利于加快活性焦的吸附过程,这些结论可以为活性焦固定床的设计操作提供参考。The activated coke desulphurization process is an advanced dry desulphurization technology and con- structing a suitable calculation model of breakthrough curves for engineering application is quite valuable. Based on the linear adsorption isotherm equation and the approximate solution of concentration a calculation method of break- through curves is obtained, which can be easily applied. Taking an activated coke fixed bed, for example, both of the theoretical and actual operation time are calculated. The results show that the actual breakthrough time is far less than ideal breakthrough time, so it is necessary to calculate and analyze for choosing the appropriate break- through time when designing activated coke fixed bed, and according to the actual breakthrough time, the break- through curve and utilization rate are further calculated. Meanwhile, analyzed the effects of SO_2 concentration at the entrance and flue gas flow velocity on the breakthrough curves and it found that an appropriately increase of SO_2 concentration at the entrance as well as velocity of flue gas at the entrance will speed up the adsorption process of activated coke. These results can provide some references for the design and operation of the fixed bed of activated coke.

关 键 词：活性焦 脱硫 固定床 吸附 穿透曲线 

分 类 号：X773[环境科学与工程—环境工程]