High efficiency solid fuel boiler of returning combustion type

摘要

The present invention relates to a boiler using a solid fuel, and the first heating of the heated fluid (water) in the surrounding inner wall with the heat of combustion inside the combustion chamber, and the heat of combustion is not discharged directly through the flue, but vertically when the upper wall is reached. Re-heating the heated fluid (water) on the outside of the tube in a second way while descending through a plurality of tubes arranged there is an advantage to provide a high efficiency boiler that can have a maximum heat recovery effect structurally.;In addition, the entire combustion chamber including the bottom of the combustion chamber is surrounded by the heated fluid (water) to maximize the efficiency by widening the heat exchange area, and greatly improves durability by reducing the thermal deformation of the combustion chamber in which solid fuel is combusted.;In addition, the fuel supply method is designed to supply solid fuel to the inside of the combustion chamber conveniently by hand, and the combustion chamber bottom is composed of a plurality of holes tapered at regular intervals and circularly tapered, so that the oxygen supply and combustion for smooth combustion from the blower can be achieved. It is an object of the present invention to provide a boiler, which can be easily removed through a hole in a natural dropping manner.;Solid fuel, high efficiency, combustion chamber, heated fluid, tube