对喷流协同蒸汽相变对燃煤细颗粒脱除性能的影响  

Removal of Fine Particles From Coal Combustion by Combined Impinging Streams and Heterogeneous Condensation

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

机构地区：[1]东南大学能源与环境学院,江苏省南京市210096

出　　处：《中国电机工程学报》2011年第32期39-45,共7页Proceedings of the CSEE

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：以燃煤锅炉产生的含尘热烟气为对象,采用电称低压冲击器(electrical low pressure impactor,ELPI)和Vaisala-HMT337型温湿度变送器等测试仪器,研究倾斜对喷流与蒸汽相变相结合的方法对燃煤细颗粒的脱除性能,实验考查烟气对喷流速、烟气对喷间距、蒸汽添加量、除雾器类型、添加润湿剂等对细颗粒脱除效率的影响规律。研究结果表明:采用对喷流和蒸汽相变技术相结合的方法可以高效脱除细颗粒物;细颗粒脱除效率随烟气对喷间距的增大先提高后降低,随烟气流速和蒸汽添加量的增大而提高;相变室出口安装丝网除雾器的脱除效果优于采用板波纹除雾器;烟气中添加挥发性乙二醇润湿剂对细颗粒脱除有一定的促进效果。The removal of fine particles from coal combustion was investigated experimentally based on impinging streams and heterogeneous condensation,with electrical low pressure impactor and Vaisala-HMT337 type temperature and humidity sensor.The influence of the operating parameters on fine particles removal efficiency was analyzed.The experimental results show that increased addition amount of steam and velocity of flue gas brings higher removal efficiency.An increase in horizontal gap between the opposing impinging causes an increased collect efficiency firstly,but then decreased.The mesh demister mounted at the top of the heterogeneous condensational growth chamber has better performance in removal particles than corrugated plate demister.Removal efficiency can be effectively promoted by adding volatile wetting agent glycol to flue gas,but not distinct by adding isooctyl alcohol or ethylenediamine.Fine particles can be removed effectively by adopting the combined impinging streams and heterogeneous condensation technology.

关 键 词：蒸汽相变 对喷流 细颗粒物 脱除 

分 类 号：X51[环境科学与工程—环境工程]