Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone

Child Classifications

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• F23B 50/02 the fuel forming a column, stack or thick layer with the combustion zone at its bottom
• F23B 50/12 the fuel being fed to the combustion zone by free fall or by sliding along inclined surfaces, e.g. from a conveyor terminating above the fuel bed