High temperature In-situ Monitoring of Power Station Steels using Electromagnetic Sensors - POWEREMS

使用电磁传感器对电站钢材进行高温原位监测 - POWEREMS

• 批准号: EP/H022937/1
• 负责人: Anthony Peyton
• 金额: $ 48.62万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH022937%2F1
• 关键词: temperature; situ; Monitoring; Power; Station

There are currently no techniques available to monitor the microstructural condition of power station steel components in-service (i.e. at elevated temperatures). This problem will become more acute as coal-fuelled power stations are being developed to operate at higher pressures and temperatures to provide greater efficiency; supercritical power stations could produce output efficiencies of 45 to 50 %, compared to subcritical power stations with efficiencies of 30 to 35 %. Operation at 620 deg C is now possible, with further temperature increases to 700 deg C planned by the year 2014. Supercritical power stations also emit up to 25 % less carbon dioxide into the environment (a one percent increase in efficiency gives a two percent drop in emissions such as carbon dioxide, and nitrogen and sulphur oxides). Currently the condition of power station components is monitored during shut down periods, when insulating lagging layers are removed and replicas from the component surface are made. These replicas are examined to determine the microstructural state (degree of degradation, e.g. through carbide population changes) and whether creep cavitation has initiated. Components are removed from service and replaced when end of predicted service life is reached or significant cavitation is detected. However, as the component condition can only be checked during a scheduled shut down period, sections are often replaced prematurely. If failure of a component occurs the economic impact is severe (an unplanned shutdown is estimated to cost approximately 1.5M per day per power station) and there is potentially significant risk to life and the environment. The proposed project is to investigate the potential of a multi-frequency electromagnetic (EM) sensor system for monitoring microstructural changes in power generation steels (e.g. boiler plate and pipe) due to high temperature exposure and creep for both in-service monitoring and evaluation during maintenance periods. The work will involve development of a sensor system for long term use at elevated temperatures, and analysis and modelling of sensor signals relative to microstructural changes in the steels.

目前还没有技术可以监测电站钢构件在役（即在高温下）的微观结构状况。这一问题将变得更加严重，因为燃煤发电站正在开发，以在更高的压力和温度下运行，以提供更高的效率；超临界电站的输出效率可达45%至50%，而亚临界电站的输出效率为30%至35%。现在可以在620摄氏度的温度下操作，计划到2014年将温度进一步提高到700摄氏度。超临界电站向环境中排放的二氧化碳也减少了25%（效率提高1%，二氧化碳、氮和硫氧化物等排放量就减少2%）。目前，电站部件的状况是在停机期间监测的，这时将移除绝缘滞后层，并从部件表面制作复制品。检查这些复制品以确定微观结构状态（降解程度，例如通过碳化物种群变化）以及蠕变空化是否已经开始。当达到预期使用寿命或检测到明显的空化时，部件将从使用中移除并更换。然而，由于部件状况只能在预定的停机期间进行检查，因此部件通常会过早更换。如果组件发生故障，经济影响是严重的（据估计，每个电站每天的计划外停机成本约为150万美元），并且对生命和环境存在潜在的重大风险。拟议的项目是研究多频电磁（EM）传感器系统的潜力，用于监测发电钢（例如锅炉板和管道）由于高温暴露和蠕变而引起的微结构变化，用于在使用中监测和维护期间的评估。这项工作将包括开发一种在高温下长期使用的传感器系统，并对与钢的微观结构变化有关的传感器信号进行分析和建模。

项目成果

Prediction of interlamellar pearlite spacing of tyre bead wires after patenting using electromagnetic techniques

使用电磁技术预测专利后轮胎钢丝的层间珠光体间距

• DOI: 10.1784/insi.2012.55.3.132
• 发表时间: 2013
• 期刊: Insight - Non-Destructive Testing and Condition Monitoring
• 作者: Balamurugan S

Non-destructive Evaluation of Power-Generation Steel Microstructure Changes using Electromagnetic Sensors

利用电磁传感器无损评估发电钢显微组织变化

• 发表时间: 2011
• 作者: Liu J

Differential permeability behaviour of P9 and T22 power station Steels

• DOI: 10.1016/j.jmmm.2013.09.059
• 发表时间: 2014-02-01
• 期刊: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
• 影响因子: 2.7
• 作者: Karimian, N.;Wilson, J. W.;Davis, C. L.
• 通讯作者: Davis, C. L.

Monitoring of Steel Microstructures using Electromagnetic sensors

使用电磁传感器监测钢的微观结构

• 发表时间: 2011
• 作者: Hao X J

Measurement of microstructure changes in 9Cr-1Mo and 2.25Cr-1Mo steels using an electromagnetic sensor

使用电磁传感器测量 9Cr-1Mo 和 2.25Cr-1Mo 钢的微观结构变化

• DOI: 10.1016/j.scriptamat.2011.11.032
• 发表时间: 2012
• 期刊: Scripta Materialia
• 影响因子: 6
• 作者: Liu J