【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。图5参7更多还原

【Abstract】 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 SO₂ 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 SO₂ 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.更多还原