Technology of Heat Supply Retrofit through Heat Pump to Recover Waste Heat from 330 MW Unit
LI Jin-cai;HU Yue-hong;Chengde Thermal Power Plant of State Power Corporation;Department of Thermal Engineering,Chengde Petroleum College;
Heat pump technology through recovering the low-temperature waste heat of circulating water from condenser,driven by extraction steam for heating from turbine as heat source,can increase the temperature of return water from the heating network to 80 ℃ which continues to raise the temperature into the heat exchanger to meet the requirement of heating supply. Due to the use of the waste heat of circulating water,unit exhaust loss and heat consumption are reduced. If raising the back pressure of unit( extraction quantity of 550 t / h) to 9. 1 k Pa,using the heat pump recovering70% waste heat of circulating,the heat consumption will decrease by 22. 6%.
【CateGory Index】： TK115;TK172