Combustion apparatus for recovering heat

This application claims the priority benefit of Korean Patent Application No. 10-2007-0117458 filed on Nov. 16, 2007, the contents of which are hereby incorporated by reference as if fully set forth herein in their entirety.

Not applicable.

This invention relates to a combustion apparatus for recovering heat, more specifically to a combustion apparatus for recovering and utilizing the combustion heat generated in a combustion chamber in which solid fuel is burned.

Generally, in industrial facilities required for industrial hot water, steam, or high temperature gas, a combustion apparatus is used for generating heat energy by the combustion of fuel in the interior of a combustion tank in order to achieve heat energy, and as a fuel in this combustion apparatus, a solid fuel such as RDF (fuelized life waste) or RPF (fuelized waste plastics) is used in consideration of economics and resource recycling.

But, this type of prior art combustion apparatus, in which plenty of solid fuel is inputted to the lower part of a combustion tank and burned, has a problem resulting in the waste of materials due to incomplete combustion of the fuel. Also, it is disadvantageous in that, since a plurality of ashes remain at the same time, it is impossible to process the automatic disposal of these remaining ashes. Furthermore, once the first combustion is finished, the next combustion is processed after a desired quantity of fuel is inputted again and is ignited, therefore, it is difficult to attain a continuous combustion process and the caloric value is not uniform.

Moreover, the combustion of this solid fuel results in exhausting much gas or particles such as dust, carbon monoxide, smoke, gas phase HCL, SOx, NOx, dioxin and the like which give rise to environmental pollution.

The invention is designed to solve the problem of the prior art, and the object of the present invention is to provide a combustion apparatus for recovering heat which is manufactured at a less expensive cost, promotes complete combustion to improve economic feasibility and thermal efficiency, and reduces the generation of environmental pollution.

A combustion apparatus for recovering heat according to the present invention comprises a combustion tank for burning fuel contained in the interior by combustion air supplied from the exterior, is characterized in that a combustion chamber surrounded by an inner wall for burning fuel is defined in said combustion tank, a swirl flow supply chamber for supplying combustion air into said combustion chamber is defined around the outer circumference of the inner wall of said combustion tank, a combustion air supply passage for supplying combustion air from said swirl flow supply chamber into said combustion chamber is defined on the inner wall of said combustion tank, said combustion air supply passage is slanted at a predetermined angle to the vertical direction of the inner face of the inner wall in said combustion tank, and the combustion air generates a swirl flow in the combustion chamber.

Furthermore, in the combustion apparatus of this invention, it is preferable to define a combustion air supply nozzle in said combustion air supply passage.

In the combustion apparatus for recovering heat of this invention, it is preferable that the angle of said combustion air supply passage and said combustion air supply nozzle slanted to the vertical direction of the inner face of the inner wall is from 45 to 80 degrees.

Moreover, a combustion apparatus for recovering heat according to the present invention is characterized in that a combustion chamber surrounded by an inner wall for burning fuel is defined in said combustion tank, an ash outlet is defined on the inner wall of said combustion tank, an ash discharge chamber is defined around the outer circumference of the inner wall of said combustion tank, ash discharged through the ash outlet is entered into the ash discharge chamber, a swirl flow supply chamber for supplying combustion air into said combustion chamber is defined around the outer circumference of said ash discharge chamber, a combustion air supply nozzle is defined between said swirl flow supply chamber and said combustion chamber for supplying combustion air from said swirl flow supply chamber into said combustion chamber, the combustion air supply nozzle is slanted at a predetermined angle in the vertical direction of the inner face of the inner wall in said combustion tank and the combustion air generates a swirl flow in the combustion tank.

Furthermore, in the combustion apparatus for recovering heat of this invention, it is preferable that an air cooling chamber for supplying combustion air supplied from the exterior into said swirl flow supply chamber is defined around the outer circumference of said swirl flow supply chamber in said combustion tank.

Also, the combustion apparatus for recovering heat of this invention is characterized in that a combustion gas exhausting tube for exhausting the combustion gas heated in said combustion chamber of said combustion tank is provided in the upper of said combustion tank, said combustion gas exhausting tube comprises a combustion gas inlet having an inside diameter reduced according to a moving direction of the combustion gas, a narrowed part, and a combustion gas outlet having an inside diameter enlarged according to the moving direction of the combustion gas.

Furthermore, the combustion apparatus for recovering heat of this invention is characterized in that it further comprises a combustion gas exhausting adjustment part installed in the combustion gas outlet of said combustion gas exhausting tube and having an outside diameter enlarged according to the moving direction of a combustion gas, and the adjustment of exhausting the combustion gas is accomplished by the rising or descending of said combustion gas exhausting adjustment part.

Moreover, the combustion apparatus for recovering heat of this invention is characterized in that a high pressure air supply part for supplying high pressure air is provided in the narrowed part of said combustion gas exhausting tube, a high pressure air supply passage into which high pressure air supplied from said high pressure air supply part is defined in said narrowed part, and said high pressure air supply passage is slanted at a predetermine angle to the vertical direction of the inner face of said narrowed part.

According to the present invention, a combustion apparatus for recovering heat is provided which is manufactured at a less expensive cost, and is capable of improving the thermal efficiency and reducing the generation of environmental pollution.