MPS中速磨煤机旋转式煤粉分离器的改造及应用

煤粉分离器是影响磨煤机性能、锅炉燃烧效率及污染物排放的重要部件之一。介绍国际上M PS中速磨煤机煤粉分离器的发展及应用,对静态挡板式煤粉分离器的运行原理进行分析,说明其优缺点;论述当前国际上最先进煤粉分离器的代表——美国B&W公司第2代DSVSTM型旋转式煤粉分离器的原理、结构特性及优点。针对扬州第二发电有限责任公司M PS89G型磨煤机采用的静态挡板式煤粉分离器存在煤粉细度调节不便等缺点,分析将其中一台改造为动态旋转式煤粉分离器的可行性,并介绍改造方案,实际运行证明改造后的磨煤机在煤粉细度调节性能等方面得到提高。应在MPS及其它类型中速磨煤机上采用旋转式煤粉分离器。

Retrofitting and application of rotating coal classifier in MPS pulverizers

Coal classifier is one of the most important parts which affects the pulverizer performance, boiler combustion efficiency and boiler emissions. The author introduces the development and application of coal classifier in MPS pulverizers in the world, tells the operating mechanism of static classifier, details the principle, structure and advantages of the second-generation DSVSTM type dynamic rotating classifier manufactured by B&W company. Aiming at the problem of controlling coal-fineness existing in static damper type classifier of MPS89G pulverizer used in Yangzhou No.2 Power Generation Co.,Ltd., the possibility and the scheme of retrofitting the classifier into dynamic rotating type are introduced. The operation shows that the fineness-control is improved after retrofitting and rotating classifiers can be used on MPS and other types of medium-speed pulverizers.