蒸汽泵烟气余热回收供热系统技术经济性分析OA

Based on the vapor-pump flue gas waste heat recovery technology,the conventional gas-fired boiler heating system is transformed into vapor-pump flue gas waste heat recovery heating system.The processes of three kinds of vapor-pump flue gas waste heat recovery heating systems are introduced,the gas saving amounts and incremental payback periods of va-por-pump flue gas waste heat recovery systems are cal-culated,and the economical efficiencies of system transformation are evaluated.The three kinds of vapor-pump flue gas waste heat recovery and heating systems are single cold source two-tower system,double cold source two-tower system and double cold source three-tower system.Compared with before the transforma-tion,the thermal efficiencies of the vapor-pump flue gas waste heat recovery heating systems have been im-proved differently,especially the double cold source three-tower system,the thermal efficiency of the system has increased from 92.5％ before the transformation to 99.9％,and the natural gas saving in one heating peri-od has reached 8.19 × 104 m3.The incremental pay-back periods of the single cold source two-tower sys-tem,the double cold source two-tower system and the double cold source three-tower system are 15.8,12.3 and 9.0 years,respectively,and the economy of the double cold source three-tower system is the best.