Flue gas waste heat utilization system of biogas generator set

The utility model discloses a biogas generator set flue gas waste heat utilization system which comprises a plurality of biogas generator sets, an air adding system, an SCR (Selective Catalytic Reduction) reactor, a high-temperature flue gas steam type waste heat boiler, an exhaust chimney and a waste heat utilization pipe network, an air supply system, an SCR (Selective Catalytic Reduction) reactor and a high-temperature flue gas steam type waste heat boiler are sequentially arranged on an exhaust pipeline of each group of marsh gas generator set, high-temperature flue gas of each group of marsh gas generator set is cooled by the air supply system, then is guided into the SCR reactor for denitration treatment, then is subjected to heat exchange by the high-temperature flue gas steam type waste heat boiler, and is converged and exhausted through an exhaust chimney; saturated steam generated by the high-temperature flue gas steam type waste heat boilers converges and is conveyed to a waste heat utilization pip