Air supplying system and method of experiment table of small supercharged boiler

The invention relates to an air supplying system and method of an experiment table of a small supercharged boiler. The air supplying system comprises a supercharger and the supercharged boiler, wherein an air outlet of the supercharger is connected with an air inlet of the supercharged boiler by a pipeline. The air supplying system is characterized by comprising a flue-gas turbine and a roots blower, wherein a flue-gas outlet of the supercharged boiler is connected with the flue-gas turbine by a pipeline; the flue-gas turbine is coaxial to the supercharger; an air outlet of the roots blower is connected with the air inlet of the supercharged boiler by a pipeline. The air supplying system has the advantages that the roots blower provides high-pressure air for the supercharged boiler to start the supercharged boiler; the air is compressed into supercharged air by the supercharger, the supercharged air enters the supercharged boiler, high-temperature flue gas exhausted by the supercharged boiler pushes the flue-gas turbine to do work, the flue-gas turbine converts heat of the high-temperature flue gas into kinetic energy and then drive the supercharger.