CAJ | 학술논문

新疆米东热电厂1号机组锅炉炉水电导率和 pH 值较高,超出正常范围,对水冷壁管存在腐蚀的风险。检测发现炉水中出现了大量游离NaOH,分析发现其由作为给水补水的热网疏水受热网循环水的污染所致。由于连续排污扩容器的分离蒸汽至除氧器的逆止阀存在缺陷,造成锅炉未真正有效排污,炉水长期处于过度浓缩状态,最终产生大量游离NaOH,对锅炉加强排污后,炉水水质恢复正常。
신강미동열전엄1호궤조과로로수전도솔화 pH 치교고,초출정상범위,대수랭벽관존재부식적풍험。검측발현로수중출현료대량유리NaOH,분석발현기유작위급수보수적열망소수수열망순배수적오염소치。유우련속배오확용기적분리증기지제양기적역지벌존재결함,조성과로미진정유효배오,로수장기처우과도농축상태,최종산생대량유리NaOH,대과로가강배오후,로수수질회복정상。
The conductivity and pH value of boiler water in No.1 unit of Midong Thermal Power Plant were over standard.So the water wall tubes suffered the risk of alkaline corrosion and boiler water concentrate corrosion.Detection finds a larger number of free sodium hydroxide appears in the boiler water.This is because the heat-supply network drain which is used as the feed water supplement water was polluted by leakage of circulating water of district heating system heater. The check valve between the steam separated from continuous blow-down flash vessel and the de-aerator had some defects,leading to invalid blow down,so the boiler water were over concentrat-ed,a larger number of free sodium hydroxide appeared in the boiler water,resulting in boiler wa-ter abnormality eventually.Finally,after improving continuous blow down,the boiler water turned back to normal.