CAJ | 학술논문

火电厂锅炉爆管事故是电厂事故中最常见的情形之一，爆管事故的发生对电厂的安全性经济性影响巨大。而此类问题的发生和锅炉管壁温度超温密不可分，因此若能全面准确可靠的监测受热面管壁温度将对电厂意义重大。但是电厂锅炉由于炉内壁温测点安装较困难，另外由于炉内温度高，即使安装了测点，测点通常寿命不长。通常安装在炉外大包内的壁温测点只能在一定程度上反应管道内部介质的温度，而对于最危险处的壁温却无法直接得到。本文针对此问题，对壁温计算模型进行了分析，利用Fluent数值模拟软件进行了燃烧模拟计算，使用Delphi语言对该计算模型编制了相应的程序，结合某电厂2028t/h锅炉实例进行计算，并假设氧化膜存在对结果的影响进行了再次计算和分析。能对电厂锅炉的安全运行提供正确的指导，也可为电厂锅炉管道的及时检修提出指导，具有重要的工程实用价值。
화전엄과로폭관사고시전엄사고중최상견적정형지일，폭관사고적발생대전엄적안전성경제성영향거대。이차류문제적발생화과로관벽온도초온밀불가분，인차약능전면준학가고적감측수열면관벽온도장대전엄의의중대。단시전엄과로유우로내벽온측점안장교곤난，령외유우로내온도고，즉사안장료측점，측점통상수명불장。통상안장재로외대포내적벽온측점지능재일정정도상반응관도내부개질적온도，이대우최위험처적벽온각무법직접득도。본문침대차문제，대벽온계산모형진행료분석，이용Fluent수치모의연건진행료연소모의계산，사용Delphi어언대해계산모형편제료상응적정서，결합모전엄2028t/h과로실례진행계산，병가설양화막존재대결과적영향진행료재차계산화분석。능대전엄과로적안전운행제공정학적지도，야가위전엄과로관도적급시검수제출지도，구유중요적공정실용개치。
Power plant boiler pipe rupture accident is one of the most common situations in power plant. Tube-burst accident has had a huge impact on the safety and economy in Power plant. The occurrence of such problems are inextricably linked with the boiler tube wall over-temperature, so it is great significance to comprehensively accurately and reliably mon-itor the tube wall temperature of heat exchangers in power plants. But due to the power plant boiler furnace wall temperature measuring point is difficult to install. Even if installed, the high temperature in the furnace usually makes it not long life. For the most dangerous place, the wall temperature cannot directly obtain.Aimed at this problem, this author analyze the wall temperature calculation model, combined with power plant example of 2028 t/h boiler, use Delphi language to compile the corresponding program for the calculation model, use numerical simulation software Fluent to simulate combustion calcula-tion and assumes the oxide film existence to calculate and analysis the effect again. This paper has significant engineering practical value, it can provide the correct guidance on the safety operation of power plant boiler, and also can put forward the guidance for power plant boiler pipe reparations.