Gas condensing boiler

A fuel gas condensing boiler comprises a boiler body, a through hole is formed in the top of the boiler body, a motor is fixedly installed on the top of the boiler body, and an output shaft of the motor is rotatably installed in the through hole through a sealing bearing, and is characterized in that a vertical pipe is fixedly installed at the lower end of the output shaft of the motor, and an annular plate is fixedly installed in the boiler body; the interior of the furnace body is divided into a first cavity and a second cavity by the annular plate, the first cavity and the second cavity are distributed up and down, a first box body with an opening in the top is fixedly mounted on the inner circumference of the annular plate, a second through groove is formed in the bottom of the first box body, and the vertical pipe is rotationally mounted in the second through groove through a sealing bearing. The device is simple in structure and ingenious in conception, water in the water tank can circulate up and down