针对多管湿式静电除尘器入口烟气均布的要求，基于流体力学原理，提出了入口等压烟道布置方式，分析了沿程压力分布模型，并通过FLUENT软件对某电厂600MW机组配套多管湿式静电除尘器内部流场进行了数值模拟。结果表明，采用等压入口烟道后阳极管束入口截面速度和粉尘浓度分布均匀，系统阻力损失较小，入口截面气流均布系数小于0.2。该等压入口设计能够降低以往导流设计的复杂性，节约成本，便于施工。%In order to meet the uniformity requirements of flue gas in multi-tube wet electrostatic precipitators ( WESP) , a type of isostatic inlet flue was put out based on aerodynamics, and then, the pressure distribution model was analyzed. Numerical simulation for a multi-tube WESP of 600 MW unit was implemented using the commercial software FLUNET. Results show that this design can get a more uniform velocity distribution as wel as dust concentration. The system pressure drop was smal and the velocity standard deviation coefficient at in-let cross-section of anode bundle was less than 0. 2. This design could also reduce the complexity of flow field optimization, lower cost, and facilitate construction.
展开▼
