Energy-saving industrial steam boiler

The utility model discloses an energy-saving industrial steam boiler, which belongs to the technical field of steam boilers and is characterized in that a base is arranged at the bottom of the boiler, a plurality of groups of cushioning bases are arranged at the bottom of the base, a fixing seat is fixedly connected to the bottom of a connecting column, a cushioning seat is connected to the bottom of a screw rod, and a cushioning spring is arranged between the cushioning seat and the fixing seat; the screw rod is in threaded connection with an adjusting nut; a preheating water tank is arranged on the outer side of the top cover, an air inlet valve is installed in the middle of the preheating water tank and comprises a shell and a piston, the piston is connected with the shell through a reset spring, a through air outlet hole is further formed in the outer wall of the shell, and an exhaust channel matched with the air outlet hole is formed in the piston. The cushioning capacity of the boiler can be improved th