多流体碱雾发生器烟气脱硫新方法的试验  

Experimental Investigation on a New Semi-Dry Flue Gas Desulfuri- zation Method with Multi-Fluid Alkaline Spray Generator

作　　者：周月桂[1] 王冬福[1] 章明川[1] 王雷[1] 于娟[1] 陈开潮[1] 缪正清[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程》2004年第5期707-710,共4页Power Engineering

基　　金：国家自然科学基金重大研究计划资助项目(90210016)

摘　　要：提出了一种新的半干法烟气脱硫方法——多流体碱雾发生器烟气脱硫,运用两相流相似模化方法建立了烟气脱硫试验台,研究了该脱硫方法中CaO脱硫剂颗粒与雾化水滴的碰撞活化效率、脱硫效率以及各种因素对脱硫效率的影响。试验结果表明:多流体碱雾发生器烟气脱硫方法在Ca/S摩尔比为2.0、高于绝热饱和温度10℃～15℃、停留时间为2.25s时,脱硫效率接近70%,且脱硫剂颗粒与雾化水滴的碰撞活化效率为70%左右,明显高于烟道增湿活化脱硫方法中25%左右的碰撞活化效率,同时又避免了直接喷射浆液喷嘴的堵塞、磨损以及反应器庞大等问题。A new semi-dry FGD method of simple and compact system and high efficiency is firstly put forward named as multi-fluid alkaline spray generator FGD method. The FGD test rig is built up to investigate the colliding activation efficiency between the sorbent particles and spraying droplets in the prefixed alkaline spray generator and the effect of various factors on SO_2 removal efficiency. The experimental results show that the colliding activation efficiency between the sorbent particles and the spraying droplets in the prefixed alkaline spray generator may reach about 70%, which is markedly higher than the 25% colliding activation efficiency in in-duct injection FGD. And the SO_2 removal efficiency can reach 65% to 70% when Ca/S mole ratio is 1.5(2.0, the approach to adiabatic saturation temperature is 10℃~15℃ and the flue gas residence time is 2.25 seconds, which is higher than that of in-duct injection FGD at the same conditions. Compared with spray dry absorber FGD, it overcomes the complex slurrying system and avoids the clogging and abrasion of slurrying spray nozzles because it only sprays thinner water droplets to activate sorbents. Figs 5 and refs 7.

关 键 词：环境工程学 烟气脱硫 模化实验 碱雾发生器 碰撞活化 

分 类 号：X701.3[环境科学与工程—环境工程]