Low NO.sub.x integrated boiler-burner apparatus

Details Low NO.sub.x integrated boiler-burner apparatus Low NO.sub.x integrated boiler-burner apparatus

1994-11-30

1996-11-19

Bennett, Henry A.

Liquid heaters and vaporizers

Water tube

122 131, 12223513, 1223671, F22B 1500

Patent

active

055752438

ABSTRACT:
A low NO.sub.x, integrated boiler-burner apparatus includes a horizontally fired, factory assembled package boiler having an inlet plenum and a furnace space is provided with a multi-nozzle burner (MNB) array including a plurality of vertically and horizontally spaced burner nozzles located at an entrance to the furnace space for supplying fuel for combustion into the furnace space. The MNB array distributes the heat of the combustion exhaust gases across the furnace space for minimizing NO.sub.x formation. One or more chill tube assemblies are located within the furnace space just downstream of the MNB array for rapidly reducing the temperature of the combustion exhaust gases. Alternatively, laterally perforated internal air duct assemblies can also be provided within the furnace space alone or in combination with the chill tube assemblies in various arrangements to provide staged air for completing combustion in the furnace space. Exhaust gases from an exhaust flue of the package boiler can also be recirculated back to the inlet plenum for re-exposing the exhaust gases to the combustion process.

REFERENCES:
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patent: 4085708 (1978-04-01), Ashdown
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patent: 4767319 (1988-08-01), Vosper
Steam: its generation and use, 39th Edition, Copyright .COPYRGT.1978 by The Babcock & Wilcox Company, pp. 25-5 to 25-10; and 27-10.
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Piwetz, Brown & Root; Aleman and Smith, Babcock & Wilcox, "A unique approach to a combined cycle unit". Technical paper No. BR-1067, presented to American Power Conference, Chicago, Ill., Apr. 20-22, 1976. Entire paper.
The Babcock & Wilcox Company brochure, "The Babcock & Wilcox Stirling Power Boiler-SPB. The most versatile steam generator available." Data circa 1975. Entire paper.
The Babcock & Wilcox Company brochure, "The Babcock & Wilcox PFT boiler. Dependable, high-pressure steam from tough liquid fuels". Data circa 1975. Entire paper.
The Babcock & Wilcox Company brochure, "The Babcock & Wilcox PFI boiler. Dependable, low-cost steam for liquid and gaseous fuel firing". Date circa 1975. Entire paper.

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