Combustion device and a method for combusting granular, solid fuel

Abstract

The invention relates to a combustion device (100) and a method for combusting granular, solid fuel, for example wood pellets. The combustion device (100) according to the present invention comprises a chamber (102) having an outer wall (104) and an inner wall (106), which inner wall (106) divides the chamber (102) into a combustion air space (108) and a combustion chamber (110). Further, the combustion device (100) comprises at least one blast apparatus (112) for providing primary combustion air and secondary combustion air and rotating means (113) for rotating the combustion chamber (110). The inner surface of the combustion chamber (110) comprises a number of steps (138) for lifting combustion fuel in the combustion chamber (110), when the combustion chamber (110) is rotated. Further, primary combustion air is provided into the combustion chamber (110) for contributing combustion of combustion fuel and for moving combustion fuel on the steps (138). In addition, secondary combustion air is provided into the combustion chamber (110) for removing completely combusted fuel and / or combustion gases from the combustion chamber (110).

Description

technical field [0001] In general, the present invention relates to combustion equipment. More particularly, the present invention relates to combustion apparatus and methods for combusting particulate solid fuels, such as wood pellets. Background technique [0002] Currently, pelletized solid fuel combustion devices (hereinafter referred to as combustion devices) such as pellet stoves are replacing conventional oil heating systems, especially in two- or one-family houses. There are several reasons for this phenomenon; just to name a few, the price of oil is increasing every year, resulting in a higher cost for residents, many people are concerned about the environmental problems of using fossil fuels, and in many countries, using Renewable energy is subsidized through state funds. The use of combustion equipment for solid particulate fuels can also be an environmental and economical option; for example, solid fuels are generally non-toxic and easy to handle, and are also ...

AI Technical Summary

Problems solved by technology

[0003] Although there are many similarities between combustion equipment and conventional oil heating systems, combustion equipment still has some disadvantages: it often happens that combustion equipment consumes more oil than they should because the combustion process does not burn the fuel completely. more fuel

However, this solution does not solve the problem of ash that collects in the combustion chamber and can hinder the air supply of the combustion process

[0006] Disadvantageously, the above solutions also do not solve the problem of accumulating ash

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