燃煤锅炉吹灰过程的熵产分析  

Analysis of Entropy Generation During Sootblowing in Coal-fired Boiler

作　　者：欧宗现 阎维平[2] 朱予东[2] 李明 

机构地区：[1]烟台龙源电力技术股份有限公司,山东烟台264006 [2]华北电力大学能源与动力工程学院,河北保定071003

出　　处：《锅炉技术》2011年第2期18-21,57,共5页Boiler Technology

摘　　要：电站燃煤锅炉运行中对受热面进行吹灰,要经历一系列不可逆过程,出现各种熵产。从热力学第二定律出发,分析电站锅炉吹灰过程的熵产,建立了吹灰蒸汽减压熵产、吹灰蒸汽混合熵产、吹灰蒸汽传热熵产、吹灰蒸汽排烟熵产以及吹灰器电机熵产的计算模型。利用某台燃煤锅炉的现场数据进行了实例计算,结果表明:同一个受热面吹灰所产生的各种熵产在数值上差别较大,吹灰蒸汽混合熵产所占份额最大;锅炉各个受热面的吹灰总熵产沿烟气流动方向呈递减趋势;各个受热面吹灰总熵产的数值都较大,进行锅炉经济性分析以及吹灰优化时必须考虑吹灰造成的熵产。This paper introduced the design characteristics, main system components, and the commissioning processes of a 600 MW W-shaped flame super-critical boiler fired anthracite coal in the Power Plant. During the steam purging process, the dropping-pressure and stable-pressure methods were joined successfully. Criterions to determine the transformation point of recirculation mode to once-through mode were put forward; also the parameters at the turning poet, such as the load and the separator pressure were determined. The design defects and operation problems were also discussed in the paper. The commissioning practice is beneficial to the further development and application of the same type boilers.

关 键 词：吹灰 熵产 不可逆过程 受热面 电站锅炉 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]