The present invention to relates to a steam circulation type boiler, without interrupting the operation of the boiler in the operation process of recovering the condensed water generated in the heating process chamber may be made a continuous operation.
For realizing this, the present invention, Susilo 10 heating heat exchanger (20) from the generated vapor is moved heated by heat exchange with the indoor heating unit 25 consisting of a; It is provided to the water exchange flow through the heating heat exchanger (20) water exchange with the Sushil 10, being the separation of the moisture contained in the steam performed in cycle, inside provided with a first water level sensor 31 the rider separation tank 30, and; It is connected to the condensed water guide pipe 35, so that a separate store may be made of the condensed water separated from the rider separation tank 30, and the inside of the second water level sensor 41, a condensate tank 40 is provided; The condensate tank 40, an air inlet pipe 45 is connected to a side where the air flows in and; And the first on-off valve 36 to control opening and closing a flow path of the condensed water guide pipe 35; And the second opening and closing valve 46 for controlling opening and closing a flow path of the air inlet pipe (45); The condensate tank 40 the condensate return pipe (48) connected to the condensed water can be returned to the Susilo 10 of the; Is installed in the steam flow path between the condensate tank 40 and Sushil 10, characterized by forming a structure in which a circulation pump 50 which applies a rotation force of the steam.