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在电厂锅炉设备中,水冷壁、过热器及出口集箱、集汽集箱、再热器及出口集箱、主蒸汽管等锅炉受压部件由超温引起的缺陷或事故是常见的安全问题。本文从分析以上锅炉受压部件的超温原因,提出防止出现超温现象的对策。1由超温引起的钢的组织劣化以耐热钢12Cr1MoVG的超温金相分析为例,12Cr1MoV钢的工作温度(壁温)超过其上限580℃后。钢材材质开始发生不同程度的球化
In power plant boiler equipment, water-cooled walls, superheaters and outlet header, collector header, reheater and outlet header, main steam pipe and other components of boiler pressure caused by over-temperature defects or accidents are common safety issues . Based on the above analysis of the over-temperature reasons for the pressure parts of the boiler, this paper puts forward the countermeasures to prevent over-temperature phenomenon. 1 by the overtemperature caused by the organizational deterioration of steel To heat-resistant steel 12Cr1MoVG over-temperature metallographic analysis, for example, 12Cr1MoV steel working temperature (wall temperature) exceeds the upper limit of 580 ℃ after. Steel material began to occur in varying degrees of nodularity