Water-tube boiler and burner

Details Water-tube boiler and burner Water-tube boiler and burner

F - Mech Eng,Light,Heat,Weapons

22

B

F22B 21/06 (2006.01) F23D 14/24 (2006.01) F23D 14/34 (2006.01) F23D 14/58 (2006.01) F23D 17/00 (2006.01) F24H 1/40 (2006.01)

Patent

CA 2226019

The invention provides a water-tube boiler and a burner capable of realizing a reduction in NO x and CO in both the combustion of liquid fuel and the combustion of gaseous fuel. The water-tube boiler comprises a burner (10) which uses liquid fuel or gaseous fuel switchably, characterized in that a plurality of water tubes (5) are arranged into an annular shape in a zone where burning-reaction ongoing gas derived from the burner (10) is present within a combustion chamber (9). The water-tube boiler comprises a burner (10) which uses liquid fuel or gaseous fuel switchably, characterized in that: a first water tube array (6) is formed by arranging a plurality of water tubes (5) into an annular shape in a zone where burning-reaction ongoing gas derived from the burner (10) is present within a combustion chamber (9); gaps (12) are provided between adjacent water tubes (5) of the first water tube array (6) so as to permit the burning-reaction ongoing gas to flow therethrough; and that a zone (13) is provided around the first water tube array (6) to allow burning reaction to be continuously effected.

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