超重力-磷酸钠法脱除低浓度SO_2  

Removal of low concentration sulfur dioxide from gas by aqueous of sodium phosphate in high gravity

作　　者：袁志国[1,2] 刘有智[2] 康晓峰[2] 宋卫[2] 彭博[2] 

机构地区：[1]太原理工大学化学化工学院,太原030024 [2]中北大学山西省超重力化工工程技术研究中心,太原030051

出　　处：《环境工程学报》2013年第11期4475-4480,共6页Chinese Journal of Environmental Engineering

基　　金：国家青年科学基金资助项目(21206153);山西省青年科技研究基金资助项目(2011021012);山西省科技攻关项目(20130321035-02)

摘　　要：为开发脱硫率高、成本低、可回收SO2的脱硫技术,以旋转填料床为吸收设备,磷酸钠溶液为吸收剂,系统开展了液气比L/G、转速N、气体中SO2浓度C SO2,in、吸收剂磷酸浓度C L和初始pH等工艺参数和溶液再生循环次数对脱硫率η影响的实验研究。结果表明,η随L/G、N、C L和初始pH的增加而增大,且它们的值越低时,η增加越明显;受G和C SO2,in影响较小。在适宜操作条件下,脱硫率达99%以上,出口SO2浓度低于100 mg/m3。磷酸钠溶液可再生循环使用,脱硫率稳定在99%以上。表明超重力-磷酸钠法脱硫技术在小的液气比下即可达到高的脱硫率,吸收剂循环使用,可实现低成本并达标治理SO2废气,且适用范围宽,具有良好的工业应用前景。To explore high desulfurization efficiency and low cost of the recovery of SO2 in exhaust gas des- ulfurization technology, aqueous solution of sodium phosphate as the absorbent, influencing factors such as liq- uid-gas volume ratio （L/G） , rotating speed（N） , concentration of SO2 in inlet gas （CSO2,in） , phosphate concen- tration CL and initial pH value of the absorbent, and cycles were studied in a rotating packed bed （RPB）. The results show that the desulfurization efficiency （η） increases with the increasing of liquid-gas ratio, rotating speed , phosphate concentration and pH value, and increases rapidly when their values are lower, but the desul- furization efficiency has no obvious distinction with the increase of concentration of SO： in inlet gas. The desulfu- rization efficiency can exceed 99% and the outlet gas concentration of SO2 is lower than 100 mg. m-3 under the appropriate operating conditions. The absorbent is renewable recycling, and the desulfurization efficiency reaches above 99%. Further, such a high gravity desulfurization of gas technology showed a potential industrial applica- tion, with aqueous solution of sodium phosphate. It is due to its great advantages of higher desulfurization effi- ciency, lower energy consumption, larger operating flexibility, etc.

关 键 词：超重力 吸收 SO2 磷酸 脱硫 旋转填料床 

分 类 号：X701.3[环境科学与工程—环境工程]