A combustion chamber for burning solid fuels

F - Mech Eng,Light,Heat,Weapons – 23 – B

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F23B 60/02 (2006.01) F23B 50/12 (2006.01) F23B 80/04 (2006.01)

Patent

CA 2677864

A combustion chamber (10) for burning solid fuels having a high volatiles content has a hollow body (11) with a cylindrical wall section (12) and a top section (13) located at end (14) of the cylindrical wall section (12). The hollow body (11) has a primary air inlet (20), a fuel inlet (23) and four volatiles outlets (25) (one shown), mounted therein. Each volatiles outlet (25) has a plurality of apertures (26) of differing sizes arranged in a plate (27). In use, the burning volatiles exit the apertures (26) in a turbulent flow resulting in efficient combustion of the volatiles. Additionally, a heat transferring surface (33) on a water jacket (32) is shaped around the combustion chamber (10) so as to define a channel (34) therebetween. This arrangement results in an efficient transfer of heat from the turbulent flow of volatiles, which is forced to circulate around the channel (34).

L'invention concerne une chambre de combustion (10) de combustibles solides à teneur élevée en éléments volatils. Cette chambre comprend un corps creux (11) pourvu d'une partie paroi cylindrique (12) et d'une partie supérieure (13) située à une extrémité (14) de la partie paroi cylindrique (12). Le corps creux (11) comporte un orifice d'entrée d'air primaire (20), un orifice d'entrée de combustible (23) et quatre orifices de sortie d'éléments volatils (25) (non représentés). Chaque orifice de sortie d'éléments volatils (25) comporte une pluralité d'ouvertures (26) de tailles différentes formées dans une plaque (27). En fonctionnement, les éléments volatils brûlés sortent par les ouvertures (26) en un flux turbulent, ce qui permet d'obtenir une combustion efficace de ces éléments. En outre, une surface de transfert de chaleur (33) sur une chemise d'eau (32) est située autour de la chambre de combustion (10) de sorte à former un canal (34), ce qui permet un transfert efficace de la chaleur émise par le flux turbulent d'éléments volatils, la chaleur étant forcée de circuler autour du canal (34).

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