ES1055932U - Improved burner for gaseous fuel. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved burner for gaseous fuel, specifically one that is of special application to a boiler for hot water with a combustión chamber or vertical aquotubular type hearth and in which both the fuel gas and the comburent air are introduced therein under pressure higher than atmospheric, which burner comprises an outer chamber for mixing the combustible gas with the combustión air, constituted by a bent tubular body that: at one end, is axially connected to a fan group that drives the combustión air; for a mid point anterior to the elbow and close to it, it is equipped with a gas inlet that presents its delivery mouth facing countercurrent of the oxidizer; and, at the other end after the elbowing, it is connected, in vertical downward direction, with a cylindrical conduit for homogenization of the fuel mixture that is continuous and concentric surface to a jacket that, fixed to said last end and passing through the upper manifold of the boiler, it is continued in a hollow body of combustión in its outer surface of the fuel mixture which, located in the combustión chamber of the boiler, is constituted by a porous sheet of refractory material and presents in its bottom base a bottom closing, so that the cylindrical homogenization duct extends out in the vicinity of the closure bottom without reaching it and forms an elongated annular pre-combustion chamber with the inner side surface of said hollow combustión body, which chamber is superiorly closed and inferiorly in communication with the mouth of the aforementioned extension of the homogenization duct by which penetrates the fuel mixture, characterized in that the homogenization duct, independent of the base of the outer mixing chamber, is related, by means of a radial flange that surrounds the upper edge of the same duct, with the upper mouth of a screen tubular which, being permeable to the fuel mixture, is concentric with respect to said duct and the hollow body of combustión, forms a stable assembly with said duct that is of smaller length than that of it and is seated by its lower mouth on the closing bottom of said hollow combustión body, the flange of said coplanar duct being maintained with the base of the outer mixing chamber and the lower edge of said duct remote from said closing bottom of said hollow combustión body. (Machine-translation by Google Translate, not legally binding)