某台循环水换热器管束腐蚀分析与防护  被引量:3

Failure Analysis and Suggestions for Heat Exchanger Tube of Circulating Water Heat Exchanger

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作  者:陈丽娟[1,2] 魏博[1,2] 徐向红 CHEN Lijuan;WEI Bo;XU Xianghong(School of Chemical Engineering,Xinjiang University,Urumqi Xinjiang 830046,China;Xinjiang Key Laboratory of Cleaner Transition of Coal&Chemical Process,Xinjiang University,Urumqi Xinjiang 830046,China)

机构地区:[1]新疆大学化工学院,新疆乌鲁木齐830046 [2]新疆大学煤炭清洁转化与化工过程自治区重点实验室,新疆乌鲁木齐830046

出  处:《新疆大学学报(自然科学版)(中英文)》2021年第2期163-167,共5页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基  金:国家自然科学基金(51966017);新疆维吾尔自治区2019教学改革项目(XJJG201911)。

摘  要:采用宏观形貌观察、X衍射分析、红外光谱分析和热重分析,对某化工厂运行约半年即泄漏的20#钢换热管进行了腐蚀过程分析.结果表明:管内壁结垢严重,发生了垢下腐蚀;同时,Cl在垢下闭塞区中富集并引发"自催化"效应,加速了垢下腐蚀的进程,导致换热管半年内就发生泄漏.The corrosion process of heat exchange tube made by 20 steel,which has been leaking for about half a year in a chemical plant,was analyzed by means of macroscopic morphology observation,X-ray diffraction analysis,infrared spectrum analysis and thermogravimetric analysis.The results show that the scale on the inner wall of the tube is serious,and the corrosion under the scale occurs.At the same time,Cl accumulates in the occluded area under the scale and causes the autocatalytic effect,which further accelerates the process of the corrosion,and causes the leakage of the heat exchange tube within half a year.

关 键 词:换热管 20#钢 垢下腐蚀 点蚀 

分 类 号:TK224.1[动力工程及工程热物理—动力机械及工程]

 

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