几种用于FGD废水处理系统的卧螺式离心脱水机技术性能比较

Technical Performance Comparisons of Horizontal Dewatering Centrifuges for FGD Waste Water Treatment System

对国外5家卧螺式离心脱水机生产厂家用于FGD废水处理系统的4～8 m3/h系列离心脱水系统产品的技术性能进行了比较,分析表明离心脱水系统主要设备组成基本相同,离心脱水机均为高速离心机,转鼓的长径比一般为(3.5～4)∶1,材质选用高合金钢全金属结构或合金-耐磨涂层相结合的工艺;均采用PLC控制,基本采用进口在线仪表;瑞典诺克森的离心机采用顺流式脱泥、(半)液压驱动方式,其余公司采用逆流脱泥方式,瑞典阿法拉伐采用单电机驱动方式,但电力消耗很小,其他公司采用双电机驱动,分离因素大的离心机(安德里茨)电力消耗最大。

Technical and performance comparisons of 4-8 m3/h series horizontal dewatering centrifuges for FGD waste water treatment system made by 5 foreign manufacturers are performed. Analysis shows that major components of the centrifugal dewatering systems of these machines are same. For example, they all use high speed centrifuge with fineness ratio of rotating bowl ranges from （3.5-4）：1, and using high alloy steel structure or combined alloy and grind resistant coating. They all adopt PLC control with imported on-line instruments; all manufacturers use reverse solid separation, except Swedish manufacturer Noxon who uses down flow separation and （semi-） hydraulic drive. Swedish manufacturer Alfalaval uses single motor drive with very low power consumption, while others use dual motor drive. The machine with largest separation factor （Andritz＇ s） consumes most power.