330MW机组不同供热方式下的经济性分析

Economy Analysis of a 330 MW Unit with Different Heating Modes

以某330 MW热电联产机组为研究对象,利用等效热降法对机组在250 MW、100 t/h供热工况下的3种供热方式的经济性进行了计算分析。结果表明:引射汇流供热节能量最大,再热热段抽汽供热节能量最小;背压式汽轮机排汽供热节能量居中,但其在煤价低、电价高时比引射汇流更具有经济性。

Taking a 330 MW heat and power cogeneration unit as the research object,in the heating condition of 250 MW and 100 t/h,a calculation and analysis was conducted on the economy of three heating modes with the equivalent heat drop method.Results show that the injection afflux heating has the maximum energy saving,and the hot reheat extraction steam heating has the minimum energy saving.The heating of exhaust steam from a back-pressure turbine has the energy saving between that of above two heating modes,and which has a better economy than the injection afflux heating in low coal price and high on-grid price.