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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >SEMI-CLOSED CCGT CYCLE WITH HIGH TEMPERATURE REACTANTS COMBUSTION
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SEMI-CLOSED CCGT CYCLE WITH HIGH TEMPERATURE REACTANTS COMBUSTION

机译：具有高温反应物燃烧的半封闭CCGT循环

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摘要

In the last years many research studies have been focused on the features of MILD combustion that is a stable form of combustion, obtained with high temperature reactants and high exhaust gas recirculation and characterized by low flame temperature and, consequently, low Nox emissions. This form of combustion is also characterized by low light emissions (for this reason it is also called "flameless" combustion) and a large range of stable operation. MILD combustion has been already applied in industrial furnaces where ceramic regenerators provide to raise the temperature of the entering diluted air, the main advantages being high efficiency and low emissions. The introduction of MILD combustion in power plants would allow for increasing the temperature of the entering reactants beyond the self-ignition temperature without increasing the NOx emission. The main goals of this technique are low combustion exergy losses, large range of stable combustion, and low NOx emissions. Some experiments have shown that the flameless conditions can be obtained using diluted reactants, even using heavy fuel oil. Good results in terms of NOx emissions and soot formation have been obtained for heavy oil combustion in a 10% oxygen concentration of reactants and combustion chamber inlet temperature of about 900K. In order to meet these conditions, a semi-closed CCGT cycle with high recirculation ratio, suitable for the use of heavy fuel oil, is proposed here, assuming state-of-the-art technologies for gas turbine and steam plant and steam cooling of the turbine blades. The thermodynamic analysis shows that the overall plant efficiency of the new scheme is close to 60% that is about the efficiency that can be obtained in modem CCGT power plant fuelling natural gas.
机译：近年来，许多研究集中在MILD燃烧的特性上，MILD燃烧是一种稳定的燃烧形式，可通过高温反应物和高废气再循环获得，并且具有低火焰温度，因此NOx排放低的特点。这种燃烧形式还具有发光量低（因此也称为“无焰”燃烧）和大范围稳定运行的特点。 MILD燃烧已经应用于工业炉中，在这些工业炉中，陶瓷蓄热器可提高进入的稀释空气的温度，主要优点是效率高，排放低。在电厂中引入MILD燃烧将允许在不增加NOx排放的情况下将进入的反应物的温度提高至超过自燃温度。该技术的主要目标是降低燃烧的火用损失，稳定的燃烧范围大和降低NOx排放。一些实验表明，即使使用重质燃油，也可以使用稀释的反应物获得无焰条件。对于重油燃烧，在10％的反应物氧气浓度和约900K的燃烧室入口温度下，已经获得了关于NOx排放和烟尘形成的良好结果。为了满足这些条件，在此提出了一种适用于重燃料油的，具有高再循环比的半封闭CCGT循环，并假设了最先进的燃气轮机和蒸汽设备技术以及蒸汽冷却技术。涡轮叶片。热力学分析表明，新方案的整体工厂效率接近60％，大约是现代CCGT发电厂为天然气提供的效率。

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