Low pressure gas burner

Details Low pressure gas burner Low pressure gas burner

B - Operations, Transporting

01

F

158/40

B01F 5/04 (2006.01) F23D 14/62 (2006.01) F23G 7/08 (2006.01)

Patent

CA 1039641

"LOW PRESSURE GAS BURNER" ABSTRACT OF THE DISCLOSURE The burner comprises inner and outer tubular concentrically arranged conduits having their outlets positioned approximately in the same plane. The inner conduit is connected to a high pressure gas source; the outer conduit is connected to a low pressure gas source. The end face of the inner conduit forms a valve seat in which a Coanda-type valve body seats. The valve body is axially displaceable away from the valve seat so as to co-operate therewith to form an annular passage. A tubular shroud concentrically surrounds the conduit outlets and valve body in spaced relation therewith. In operation, high pressure gas unseats the valve body and flows at high velocity through the annular passage. This gas flow follows the surface of the valve body in the form of an attached jet and creates a low pressure zone adjacent said valve body surface, with the result that low pressure gas is sucked or drawn out of the outer conduit and simultaneously air is drafted into the annulus formed between the shroud and the valve body. The three streams mix in the annulus to form a combustible mixture. The burner is advantageous in that it provides improved suction and mixing, thereby using a relative- ly low amount of high pressure gas in its operation.

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