14 MW煤粉炉热力除氧器系统优化改造  

The practice of optimizing the thermal deaerator system of 14 MW pulverized coal boiler

作　　者：崔豫泓 CUI Yu-hong(China Coal Research Institute Company of Energy Conservation,Beijing 100013,China)

机构地区：[1]煤科院节能技术有限公司,北京100013

出　　处：《煤炭加工与综合利用》2021年第8期76-79,共4页Coal Processing & Comprehensive Utilization

基　　金：煤科院节能技术有限公司科技发展基金资助项目(2020JNZD-01)。

摘　　要：神东矿区某锅炉房软化水溶解氧含量长期超标,严重影响锅炉设备的使用寿命,通过对除氧器系统中除氧头、再沸管、溢流管及控制系统等的改造升级,神东矿区各锅炉实现了连续、稳定运行,给水泵无汽蚀现象发生,满足锅炉用水量要求;自控系统高效稳定,实现了全自动恒压补水和恒液位。与改造前相比,同样负荷下运行,用水用汽量明显减少,水箱温度维持在95~100℃左右,系统效率升高。水质检验表明,除氧水箱中的溶解氧质量浓度不大于0.03 mg/L,达到锅炉用水要求,有效解决了锅炉系统氧腐蚀现象的发生,为锅炉系统的高效稳定运行提供了保障。The dissolved oxygen content of softened water in a boiler room in Shendong mining area exceeded the standard for a long time,which seriously affects the service life of the boiler equipment.Through the transformation and upgrading of the deaerator head,reboiler pipe,overflow pipe and control system in the deaerator system,after the transformation was completed,The boilers in the Shendong mining area have realized continuous and stable operation,and the feed water pump has no cavitation phenomenon,which meets the boiler water consumption requirements;the automatic control system is efficient and stable,and realizes automatic constant pressure water replenishment and constant liquid level.Compared with before the transformation,running under the same load,the amount of water and steam consumption is significantly reduced,the temperature of the water tank is maintained at about 95~100℃,and the system efficiency is increased.The water quality inspection shows that the dissolved oxygen content in the deaerator water tank is≤0.03 mg/L,which meets the boiler water requirements,effectively solves the occurrence of oxygen corrosion in the boiler system,and provides a guarantee for the efficient and stable operation.

关 键 词：煤粉锅炉 旋膜 汽蚀 控制系统 

分 类 号：TE685.3[石油与天然气工程—油气加工工程]