OIL BURNER/WINDBOX PACKAGE

ratings. Make modifications and additions to the system to ensure

penetration and turbulence of areas of the furnace as required after

startup. [There will be no cinder return system incorporated in the

overfire air system.]

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NOTE: At the text below, delete the following

paragraph on pneumatic cinder return (fly ash

reinjection) system when this system will not be

incorporated in the project.

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[a.

Cinder Return System (Fly Ash Reinjection): Provide a pneumatic

cinder return system to reinject collected fly ash and unburned

combustibles into the furnace. The system shall operate in

conjunction with the overfire air system and shall be complete

with necessary air lines, nozzles, ducts, and dampers for

returning the cinders from the rear convection pass hopper of the

boiler and the economizer soot hopper or air heater hopper.

Cinder return lines, shall be constructed of abrasion-resistant

iron having a Brinnell hardness of not less than 350, with the

exception that the straight conveyor lines, starting at a point

not less than 600 mm 2 feet downstream from each cinder pickup

nozzle or elbow extending to within not less than 600 mm 2 feet of

the furnace, may be constructed of extra strong Schedule 80 steel

pipe. Provide glass viewing ports at the end of each cinder

return line so that interior of lines are visible all the way

through to furnace.]

]2.5

OIL BURNER/WINDBOX PACKAGE

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NOTE: Choose this paragraph and its subparagraphs

when oil is used.

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NOTE: The designer shall fill in the appropriate

information as defined in MIL-B-18796.

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Provide a fully modulating, oil burner conforming to MIL-B-18796 Rev F,

Class [_____], except as modified below. Provide burner with windbox,

forced draft fan, dampers, fuel train and associated controls to comprise a

complete factory assembled package. Total heat input to boiler furnace

shall be provided by [_____] burners. Burner package shall be considered

an integral part of the steam generator and shall be subject to applicable

provisions of the boiler design and service together with requirement of

tests, performance guarantees and other warranties specified for the boiler.

2.5.1

Burner

2.5.1.1

Burner Characteristics

The burner shall be quiet in operation and operate with a balanced clean,

stable flame so as not to localize heat in any part of the combustion

chamber. Burner shall be capable of completely atomizing and effectively

mixing oil with air so as to ensure complete combustion. Air admitted

shall be of sufficient quantity for complete combustion, but not of such

SECTION 15502N

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