汽轮机组供热改造方案研究

Study on heating reform of steam turbine unit

为响应国家节能减排相关政策、满足某市城市供热规划需求,某电厂2×135 MW机组进行了热电联产供热改造,将抽汽凝汽式汽轮机改为背压式供热汽轮机,新设联通管道将中排上部2路排汽合并至DN 1200 mm供汽管道引出,同时引出5 t/h蒸汽减温减压后通入低压缸作冷却蒸汽。对改造前后的参数及主要经济指标进行对比,改造后该工程每年可节约标准煤约9.4 kt,减少了区域燃煤消耗及烟尘排放量。

In response to national policies energy conservation and emissions reduction,to meet the demand of civil heating supply modification,2 × 135 MW steam turbine were taken into heat-and-power cogeneration transformation. The extraction condensate heating unit was changed into back pressure unit,a new unicom exhaust pipes will consolidate and lead the gas from the2 upper roads to DN1 200 mm steam supply line,at the same time extract 5 t/h steam,which after temperature and pressure reduction,will be cooled in the low pressure cylinder. Compared the parameters and main economic indicators before and after modification,the project can save about 9. 4 kt of standard coal every year,which reduce the consumption of coal and smoke in the region.