Combustion – Process of combustion or burner operation – Flame shaping – or distributing components in combustion zone
Patent
1995-07-24
1999-08-03
Yeung, James C.
Combustion
Process of combustion or burner operation
Flame shaping, or distributing components in combustion zone
431181, 431215, 432180, 432181, F23C 500
Patent
active
059316535
ABSTRACT:
The present invention relates to a low nitrogen oxygen regenerative burner, a regenerative burner system and a regenerative burning method. The low nitrogen oxide regenerative burner is comprised of one or more pairs of regenerators having a regenerating section inside and air supply and exhaust ports which open directly opened into a furnace; and one or more fuel injection nozzles for each of the air supply and exhaust ports, which also open directly into the furnace at locations apart from the corresponding air supply and exhaust port. The regenerative burner system consists of a furnace body, the low nitrogen oxide regenerative burner and a control means. The regenerative burning method is the process whereby air is preheated in the regenerator, injected from the air supply and exhaust ports of the regenerators into the furnace, fuel from the fuel injection nozzles located apart from the air supply and exhaust ports, is injected. The air and fuel form respectively independent jets, and suck large amounts of the inert gas filling the furnace as the combustion product, to be mixed with it, before they are mixed with each other to initiate burning. After the air and fuel have been sufficiently diluted by the inert gas, they are mixed with each other for burning. Slow burning occurs at a low oxygen concentration, and the existence of a large amount of the inert gas can keep the flame temperature low, all of which effectively inhibit the formation of thermal NOx.
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Tokyo Gas Co. Ltd.
Yeung James C.
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