半干半湿法烟气脱硫主要影响因素分析  

Investigation into major influencing factors of semi-dry flue gas desulfurization

作　　者：王军方[1] 王凡[2] 张凡[2] 王红梅[2] 高境[2] 郝永利[2] 高静[2] 

机构地区：[1]北京化工大学,北京100029 [2]中国环境科学研究院,北京100012

出　　处：《环境污染治理技术与设备》2004年第12期21-24,共4页Techniques and Equipment for Environmental Pollution Control

基　　金：国家"863"资助项目"大中型燃煤工业锅炉半干半湿法烟气脱硫技术及设备产业化"(2001AA6420303)

摘　　要：建立了半干法气流床烟气脱硫实验反应装置。实验研究了温度、绝对含湿量和飞灰对烟气脱硫的影响。烟气温度在65～130℃之间,绝对含湿量通过改变蒸汽量调节,在0%～10%之间,并且采用飞灰一次加入来模拟返灰,石灰与粉煤灰的比例分别为1∶3,1∶5和1∶8。结果表明,没有水蒸气加入时,温度的升高对脱硫效率影响不大,加入水蒸气后温度为68℃左右时,脱硫效率最高;65℃时,绝对含湿量在73%时脱硫效率最高;在T=68℃、Ca/S=12时,与不加粉煤灰的脱硫剂相比,利用石灰/粉煤灰=1∶8的混合脱硫剂时,脱硫效率提高了128%。An experimental study has been performed on flue gas desulfurization (FGD) by flowing bed. This paper presents the relationship between desulfurization efficiency and the parameters of temperature and absolute humidity and fly ash. The study of reaction between the sorbents with SO 2 has been performed from 65 ℃ to 130 ℃, and the humidity is changed by adjusting the flow rate of the steam from 0% to 10%. In addition, the fly ash is added to simulate the recycle of fly ash, the ratios of fly ash to calcium are 1∶3, 1∶5, 1∶8 respectively. The experiment results indicate that temperature doesn’t have a strong effect upon desulfurization efficiency without water vapor, and the highest efficiency is achieved when temperature of flue gas is 68 ℃ or so with water vapor; and T =65 ℃, reaction shows the best result when absolute humidity is 7.3%; as for the influence of fly ash, when T =68 ℃, Ca/S=1.2, comparing with CaO, the efficiency increases 12 8% by the sorbent of 1∶8 (CaO to fly ash).

关 键 词：烟气脱硫 脱硫效率 半干半湿法 飞灰 脱硫剂 粉煤灰 半干法 反应装置 气流床 水蒸气 

分 类 号：X701.3[环境科学与工程—环境工程] X773