浅谈200MW以下机组增容降耗及热电联营

Heat-Electricity Unitization strategy used in units under 200 MW expand capacity and lower ullage

目前我国200 MW以下机组发电供电煤耗较高,国家已要求逐步关停退役。但由于投入产出问题,今后若干年要全部关停退役不太现实,因此对于200 MW以下机组,特别是125 MW、200 MW机型的节能管理和降耗改造就成了最引人关注的课题。一般而言火电厂的热效率只有30～40%,如果蒸汽驱动汽轮机的过程或之后的抽汽或排汽的热量能加以利用,可以既发电又供热,其热效率可达80～90%,能源利用效率可以比单纯发电约提高一倍以上,热电联产为200 MW以下机组节能降耗走出了一条新路子。

Coal consumption of gensets under 220 MW is much high in our country and it is not realistic to close those units rapidly in the future, so saving energy and lowering ullage become the most key administrative task. Applying heatelectricity unitization in power station can increase thermischer to 80-90%, which paves a new way for those gensets.