应用蒸汽相变脱除燃煤湿法脱硫净烟气中细颗粒物  

Removal of fine particles by heterogeneous condensationfrom wet-process desulfurized flue gas

作　　者：熊桂龙[1] 杨林军[1] 颜金培[1] 鲍静静[1] 耿俊峰[1] 陆斌[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《化工学报》2011年第10期2932-2938,共7页CIESC Journal

基　　金：国家高技术研究发展计划项目(2008AA05Z306);江苏省自然科学基金项目(BK2008283)~~

摘　　要：以经石灰石/石膏法脱硫后的高湿烟气为对象,采用撞击流结构蒸汽相变室,试验研究了烟气相对湿度、蒸汽添加位置及添加量、烟气对喷水平间距、喷雾聚并等对细颗粒脱除效率的影响规律,并与普通蒸汽相变室进行了比较。结果表明:采用撞击流结构相变室,细颗粒脱除效果明显优于普通蒸汽相变室,在蒸汽添加量为0.04 kg.m-3时,数浓度脱除率可由普通相变室的35%增至65%左右;细颗粒脱除效率随烟气对喷水平间距增大先提高后降低,随烟气相对湿度增大而提高,随蒸汽添加量增加先增大后趋于稳定;最佳蒸汽添加位置是在烟气撞击区上游;相变室中喷入雾化水对细颗粒物脱除效果影响不明显。The removal of fine particles from wet limestone/gypsum processes desulfurized flue gas was investigated in a gradient opposing jet heterogeneous condensational growth chamber. The influence of the operating parameters, such as relative humidity of flue gas, steam adding position and amount, horizontal gap of opposing jet of flue gas, spraying coalescence, on fine particles removal efficiency was studied and analyzed, and compared the results with those of ordinary horizontal type heterogeneous condensational growth chamber. The results show that fine particles can be removed effectively, and the gradient opposing jet heterogeneous condensational growth chamber has better performance in removal particles than ordinary horizontal type heterogeneous condensational growth chamber. If the addition amount of steam is 0.04 kg · m-s, number concentration removal efficiency increases from 35% to 65%. Increase of relative humidity in inlet flue gas brings higher removal efficiency. An increase in horizontal gap between the opposing jets leads to an increased collect efficiency firstly, then decreased. The removal efficiency goes up firstly and then keeps stable with the increase of steam amount. The optimum position adding steam is at upstream of impinging zone. The increase of removal efficiency is limited by spraying aggregation.

关 键 词：蒸汽相变 撞击流 细颗粒物 脱除 

分 类 号：X51[环境科学与工程—环境工程]