600MW超临界锅炉半辐射受热面积灰监测模型研究  

Monitoring Model for Ash Fouling on Semi-radiation Heating Surface of a 600 MW Supercritical Boiler

作　　者：徐力刚[1] 黄亚继[1] 岳峻峰[2] 陈波[1] 

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096 [2]江苏方天电力技术有限公司,南京211102

出　　处：《动力工程学报》2015年第11期871-877,共7页Journal of Chinese Society of Power Engineering

基　　金：江苏省产学研前瞻性联合研究资助项目(BY2011149)

摘　　要：针对燃煤锅炉受热面积灰监测的需求,以某电厂600 MW锅炉的半辐射受热面为研究对象,采用污染率作为受热面积灰监测指标建立了监测模型,提出了一种高温区域烟气温度推算方法,在变负荷工况下考虑了锅炉运行动态特性并引入集总参数动态修正模型,研究了稳定负荷和变负荷工况下半辐射受热面的污染率变化趋势.结果表明:稳定负荷下的积灰监测模型能够满足积灰监测的要求,而变负荷工况下的积灰监测模型虽然在一定程度上缓解了负荷变化的影响,但污染率计算结果波动较大,仍受到负荷变化的干扰.To realize monitoring of ash fouling status on heating surface of coal-fired boilers, a monitoring model was established by taking the semi-radiation heating surface of a 600 MW supercritical boiler as the research object, and by using the ash fouling rate as the monitoring indicator, based on which a method for calculation of the flue gas temperature in high-temperature region was proposed, considering the dynamic characteristics of the boiler during variable load operation, while the lumped parameter dynamic correction model was adopted, so as to study the variation tendency of ash fouling on the semi-radiation heating sur- face during stable and variable load operation. Results show that the model for stable load operation can satisfy the monitoring requirement of ash fouling; whereas the calculation results obtained by the model for variable load operation is still affected by the load variation, even if the influence of load variation has al- ready been considered.

关 键 词：超临界锅炉 半辐射受热面 积灰监测 污染率 变负荷 集总参数动态修正模型 

分 类 号：TK227.3[动力工程及工程热物理—动力机械及工程]