Abstract: Aimed at the existing steam injection boiler with wet saturated steam, the steam overheating and tube-burst pre-warning device is developed. The judgment basis and algorithm model of steam overheating monitoring are given, and the composition of the design device, component connection and man-machine interface are optimized. According to the physical properties of water and steam, the steam state is divided into four operation conditions: overheating alarm zone, overheating warning zone, operating zone and safety zone. Based on this, the visual coordinate diagram and the overheating monitoring histogram of the steam operating condition monitoring are designed in the man-machine interface. The steam overheating incidents are classified and filtered to make the device more reliable for steam overheating and early warning. Through field application data analysis, the effectiveness of the device is verified.

Key words: Steam injection boiler, Wet saturated steam, Steam overheating, Tubeburst

摘要： 针对发生湿饱和蒸汽的现役注汽锅炉，研制蒸汽过热爆管预警装置，给出了蒸汽过热监测的判定依据和算法模型，优化设计装置的组成、组件连接和人机界面。根据水和蒸汽的物理性质，将蒸汽状态划分为过热报警区、过热警告区、运行区和安全区四种工况区域，以此在人机界面中设计了蒸汽工况运行状态监测直观坐标图和过热度监测柱状图。对蒸汽过热事件进行了分类和过滤，使装置对蒸汽过热爆管预警更可靠。通过现场应用的数据分析，验证了装置的使用效果。

关键词: 注汽锅炉, 湿饱和蒸汽, 蒸汽过热, 爆管