摘要
对在自行开发的新型传质设备--撞击流吸收器中用石灰乳吸收脱除烟气SO2的工艺进行了实验室研究,雾化喷嘴采用高效率低能耗的旋涡压力喷嘴。研究了一些操作和结构参数如液气比VL:VG,nCa:nS,SO2含量和撞击距离等对脱硫效率的影响。当在较适宜的条件下如VL:VG=0.84L/m3,撞击速度u0=7.0m/s时,脱硫效率可达92.5%。根据平均雾滴直径导出了kG的计算式。在撞击速度u0为2.35～7.15的范围内,kCa大小0.17～0.83m/s,kG为6.41～16.7mm/s,说明撞击流气液反应器加强了传质效果。
A new impinging stream absorber for flue gas desulfurization is developed. The patented eddy pressure nozzles are used for spraying the absorbent. The influences of some operating and structure parameters, such as VL/VG, Ca/S mol ratio, SO2 content in ″flue gas″, impingement distance S, etc are examined. Under moderate conditions of liquid to gas flow rate ratio VL/VG=0.84 L/m3 and impinging velocity u0=7.0 m/s, it yields a sulfur free fraction of 92.5%. The individual gas film mass transfer coefficient, kG, is determined based on the mean diameter of spray droplets. kGa is ranged from 0.17 to 0.83 s/1, and kG from 0.00641 to 0.0167 m·s/1, showing clearly the effect of GIS enhancing mass transfer.
出处
《化工生产与技术》
CAS
2006年第3期13-15,共3页
Chemical Production and Technology
关键词
撞击流
吸收
脱硫
石灰乳
传质
impinging streams
absorption
flue gas desulfurization
mass transfer
