Combustion furnace construction particularly a refuse incinerator

摘要

A combustion furnace particularly for refuse incineration comprises furnace walls which enclose a fire chamber having a grate extending across at least a part of the fire chamber of the furnace. The furnace walls have a portion adjacent the grate which comprises inner and outer spaced metal walls with a hollow space between said walls. A metal shield plate is spaced inwardly from said inner furnace wall and extends around at least a substantial portion of the periphery of the grate which is adjacent the furnace walls and there is an intermediate hollow space between the shield plate and the inner furnace wall. The inner metal furnace wall has openings communicating with the hollow space between the inner and the outer furnace walls and the shield plate has openings communicating with the intermediate hollow space between the shield plate and the inner furnace wall with the fire chamber. Means are provided for supplying air into the hollow space between the inner and outer furnace walls which flows through the openings of the inner wall to the space between the inner wall and the shield and also through the openings of the shield to the furnace chamber so that it both aids in the combustion and in cooling the metal shield plate and the furnace walls.