Quadrangular type multi-tube once-through boiler

F - Mech Eng,Light,Heat,Weapons – 22 – B

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F22B 1/00 (2006.01) F22B 21/04 (2006.01) F22B 31/00 (2006.01) F22B 33/12 (2006.01) F24H 1/40 (2006.01)

Patent

CA 2006576

A quadrangular type multi-tube once-through boiler having an arrangement in which a feed path for combustion air, a combustion chamber, and an exhaust gas channel passing through a flue are aligned in substantially the same plane, and provided with a burner duct and a blower each installed in any desired regions in outer wall portions defining the width of the boiler body. The boiler body comprises an assembly of a plurality of substantially vertically disposed water tubes, so that combustion gas flows crosswise of the water tubes. A burner is disposed in close adjacency to the first row of water tubes the water tube assembly, whereby even if fuel from the burner is ignited in a space between the first row of water tubes and the burner, actual combustion does not proceed to completion therebetween but the most of the unburnt gas burns completely while it flows through water tube clearances.

Chaudière multitubulaire à passage unique de type quadrangulaire ayant un agencement dans lequel un trajet d'alimentation en air comburant, une chambre de combustion et un canal de gaz de combustion traversant un conduit de fumées sont alignés substantiellement dans le même plan, et dotée d'un conduit de brûleur et d'un ventilateur posés chacun à l'endroit souhaité dans des parties de la paroi extérieure définissant la largeur du corps de la chaudière. Le corps de la chaudière comporte un ensemble de tubes d'eau placés substantiellement à la verticale, de sorte que les gaz de combustion s'écoulent transversalement par rapport aux tubes d'eau. Un brûleur est placé en étroite proximité avec la première rangée de l'ensemble de tubes d'eau, de sorte que même si du combustible venant du brûleur est allumé dans un espace entre la première rangée de tubes d'eau et le brûleur, la combustion effective ne s'y complète pas, mais la plus grande partie des imbrûlés se consume complètement en s'écoulant dans les espaces libres entre les tubes d'eau.

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