通过对某电厂2台350MW热电联产机组汽轮机主要参数及运行工况、凝汽器技术条件、间接空冷机组的高背压运行能力进行分析,确定采用高背压凝汽器分裂运行的余热回收供热改造方案。利用汽轮机可高背压(最高48kPa)运行的特点,在冬季供暖期高背压运行,用热网循环水替代主机循环水作为凝汽器的主要冷却水源,凝汽器2个水室为双温区分裂运行模式。供热改造后实际供热面积增加了250×104 m2,1个供暖季节省燃煤5.5×104 t,节省燃料费用1 600×104元,可减少SO2、NO2和烟尘排放量分别为:130、240、16t,具有良好的经济和社会效益。
By analyzing the main parameters and operating conditions, the condenser technical conditions and the indirect air cooling unit high back pressure operating capacity of two 350 MW cogeneration steam turbines in a power plant, the heat recovery and heating reform scheme using the split running of the high back pressure condenser is determined. Using the christeristics of high back pressure operation (the maximum operation pressure is 48 kPa) of steam turbine, the steam turbine operates at high back pressure during the heating period in winter. The main cooling water source of the condenser replaces the main circulating water with the circulating water of the heat network ,and the two water chambers of the condenser are divided into two temperature zones. The actual heating area increased by 250X 104 rrr after the heat supply reform, and the coal saving consumption in one heating season was about 5. 5 X 10^4 t, fuel coots saving was about 1 600 X 101 yuan( RMB), and SO:. NO2 and soot emissions was decreased by 130, 240 and 16 t respectively, which has good economic and social benefits.
Jilin Electric Power
indirect air cooling
high back pressure running
circulating water of heating network
split running mode