| 摘要 |
The present invention relates to a pellet boiler comprising: a lower heat exchanger formed in a primary combustion chamber; an upper heat exchanger coupled to an upper portion of the lower heat exchanger and having a secondary combustion chamber and a tertiary combustion chamber and a sensible heat tube for interconnecting the secondary chamber and the tertiary chamber; a burner unit coupled to one side of the lower heat exchanger to ignite the pellet fuel contained in the lower heat exchanger; and a dust-collecting cyclone unit coupled to an outer surface of the upper heat exchanger such that the combustion gas passed through the tertiary combustion chamber can be introduced into the dust-collecting cyclone, the dust-collecting cyclone unit collecting, through a lower portion thereof, the dust and ash contained in the combustion gas by cyclone effects. The dust-collecting cyclone unit comprises a latent heat exchanger having a plurality of latent heat tubes therein and exchanging heat with the sensible heat tube using the latent heat generated during a condensation of the combustion gas; and a cyclone tube arranged below the latent heat exchanger and having a conical shape with a diameter decreasing as it goes downwardly, the cyclone tube enabling the dust in the combustion gas to fall downwardly as the combustion gas rotates along an inner wall surface of the cyclone tube. |
