摘要
为解决凝汽器严重结垢的问题,采用集中发球技术对其清洗系统进行了改造。改造中,胶球发送采用间歇集中发球方式,由压缩空气驱动;胶球收集采用V型活动网板漏斗式收球网,由排污泵驱动。对改造后系统进行了性能测试。结果表明,改造后胶球清洗系统的收球数为8700~9000个,收球率由改造前的55%~70%增加到96%~99%;改造后凝汽器传热系数增加21%,清洁系数增加22%,传热端差降低1.05℃,冷却水出口温度降低0.5℃,凝汽器压力降低0.36 kPa,真空度降幅为7.9%,凝汽器温度降低1.6℃,机组煤耗降低1.2 g/(kW·h)。本集中发球式胶球清洗系统提高了凝汽器传热性能及机组发电效率。
To solve the serious scaling problem of a condenser,a centralized ball serve technique was adopted to upgrade its cleaning system.In present work,the rubber ball serve device is driven by compressed air in an intermittent and centralized manner.The rubber ball receiving device is driven by a sewage pump through a V-shaped movable mesh plate.A test was conducted to fully know the condenser performances.It is resulted that the number of rubber balls collected by the cleaning system range from 8700 to 9000.The ball collection ratio increases from 55%-70%to 96%-99%,the heat transfer coefficient increase by 21%,the cleanliness factor increase by 22%,the terminal temperature difference reduce by 1.05℃,the outlet temperature of cold water reduce by 0.5℃,the condenser pressure decrease by 0.36 kPa,the vacuum degree reduce by 7.9%,the condenser temperature decrease by 1.6℃,the coal consumption of the power unit decrease by 1.2 g/(kW·h).The present rubber ball cleaning system facilitates to improve the heat transfer performance of the condenser and increase the electrical efficiency.
作者
李小民
高思芳
孙昆峰
苏之勇
朱彩霞
LI Xiaomin;GAO Sifang;SUN Kunfeng;SU Zhiyong;ZHU Caixia(School of Energy&Environment,Zhongyuan University of Technology,Zhengzhou 450007,China;Henan Xin'an Engineering Technology Co.,Ltd.,Zhengzhou 450000,China)
出处
《能源研究与管理》
2024年第2期116-121,共6页
Energy Research and Management
关键词
凝汽器
胶球清洗
传热系数
清洁系数
condenser
rubber ball cleaning
heat transfer coefficient
cleanliness factor
