电厂除尘器入口烟道数值模拟及改造  

NUMERICAL SIMULATION AND RETROFIT OF INLET FLUE DUCT FOR ELETROSTATIC PRECIPITATOR

作　　者：陶克轩 常毅君[1] 张波[2] 王晓冰[2] 牛国平[2] 卢承政[2] 杨恂[2] 

机构地区：[1]华能玉环电厂,浙江玉环317604 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2011年第1期52-54,共3页Thermal Power Generation

摘　　要：通过数值模拟分析某电厂超超临界4×1 000 MW机组除尘器入口飞灰流量分布不均匀的原因,认为是由于除尘器入口结构不合理所致。为此,提出了相应改进措施:(1)在烟道分配室内安装2片导流板;(2)改造原除尘器入口结构中的3号烟道和2号烟道之间的导流板;(3)在1号烟道入口下方安装导灰板。改造后,灰量分布偏差由19%降为7%,灰量均流效果显著。Through Numerical Simulation,the causes leading to non-uniform distribution of fly ash at inlet of the electrostatic precipitator（EP） for ultra-supercritical 4×1000 MW untis in one power plant has been analysed,it is believed that the said situation is due to unreasonable structure of the EP＇s inlet.For this,retrofit measures have been put forward as follows：（1） two baffle plates have to be installed into distribution chamber of the flue duct;（2） the baffle plate between flue duct no.3 and flue duct no.2 in original structure of EP＇s inlets has to be retrofitted;（3） a guide plate for ash has to be installed below inlet of flue duct no.1.After retrofitting,the deviation of fly ash distribution decreases from 19% before retrofit to 7% after retrofit,the effectiveness of fly ash uniformization being remarkable.

关 键 词：火电厂 1000MW机组 除尘器 入口 烟道 灰量分布 数值模拟 

分 类 号：X701.2[环境科学与工程—环境工程]