600MW亚临界机组综合节能减排改造方案对比

Comparative Study on Comprehensive Energy Saving and Emission Reduction Schemes for 600 MW Subcritical Units

为提高亚临界火电机组技术先进性和保护生态环境,某燃煤电厂需对其600MW亚临界机组进行综合节能减排改造。通过对比分析汽机侧主、再热蒸汽由16.7MPa/538℃/538℃分别双提温至16.7MPa/566℃/566℃、16.7MPa/581℃/581℃和16.7MPa/596℃/596℃及湿冷机组直间接空冷改造等不同改造方案,最终采用了将汽机侧主、再热蒸汽双提温至16.7MPa/596℃/596℃的直接空冷机组改造路线,实现了机组由亚临界参数直接提升到超超临界级别参数的跨代升级,改造后节能节水减排效果显著。

To improve the advanced technology of subcritical thermal power units and protect the ecological environment,a coalfired power plant needs to carry out comprehensive energy saving and emission reduction for its 600MW sub critical unit.Through the comparison and analysis of the main reheat steam from 16.7 MPa/538℃/538℃to 16.7 MPa/566℃/566℃,16.7 MPa/581℃/581℃and 16.7 MPa/596℃/596℃and direct and indirect air cooling of wet cooling unit,the transformation route of direct air cooling unit was adopted to double raise the main reheat steam temperature of steam turbine side to 16.7 MPa/596℃/596℃,which realized the unit from sub temporary The boundary parameters are directly upgraded to ultra supercritical level,and the effect of energy saving,water saving and emission reduction is remarkable after the transformation.