US1531673A

US1531673A - Boiler furnace

Info

Publication number: US1531673A
Application number: US405041A
Authority: US
Inventors: Henry J S Mackay
Original assignee: Babcock and Wilcox Co
Current assignee: Babcock and Wilcox Co
Priority date: 1920-08-21
Filing date: 1920-08-21
Publication date: 1925-03-31
Anticipated expiration: 1942-03-31

Description

March 31. 192s.

v 1,531,673 H. J. s. MacKAY BOILER FURNACE Filed Aug, 21, i920 2 sheets-sheet l March 31. 1525. 1,531,673

H. J. S. MaCKAY BOILER FURNAGE Filed Aug. :21,v 1920 2 sheets-sheet 2 .IN VEN TGR. MAW d waa/a7 BY w( .1 @ma ATTORNEYS.

Patented Manl, 1925,.. y

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HENRY J". yS. MACKAY, OF HYDE, ISLE OF WIGHT, ENGLAND, ASSIGNOR TQ THE BAB- COKCK s WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATON 0F NH'` JERSEY.

v BOILER FURNACE.

To all whom it may concern.'

Be it known that I, HENRY J. S. MACKAY, a subject of the King of Great Britain, residing at Rosemount, Bellevue Road, Hyde, lsle of Wight, in the county of Hampshire, England, have invented certain new and useful Improvements in Boiler Furnaces, of which the followingv is a specification.

This invention relates to boiler furnaces and has for its object to provide an improved construction and arangement of such furnaces particularly adapted for usc Afor burning wood, megass and like fuel.

@ne of the objects of the invention is to provide a sloping grate on which the fuel may be dried and partly consumed and a horizontal grate on which the combustion may be completed, under forced draft, if desired. l

Another object of the invention is to provide a roof over such grates designed so that the heat from the point of complete combustion may be reflected and radiate to the fuel on the slopin grate to drive olf excess moisture from suc fuel. l f

Another object of the invention is to provide such a furnace with a charging hopperl arranged so that the entrance of air to the furnace, while charging it, is prevented. With these and other obects in view, my invention camprises the arrangement hereinafter described and pointed out in the appended claims.I

The invention is illustrated in the accompanving drawings in which Figure l is a sectional elevation of a boiler furnace constructed in accordance with the invention;

Fig.' 2 is a plan View, partially broken away of the furnace and setting of Fig. l, and Fig. 3 is a section taken along the plane of the line 3-3 of Fig. 1.

In the illustrated form, the furnace'is provided near its upper end with a charging hopper a consisting of a wrought iron or steel chute with a top cover b connected by means of'a wire rope or the like with a guillotine door c located in the furnace end of the hopper in such manner that the guillotine door closes at the moment the coverof the' hopper is opened to charge the same with fueland no air can be admitted tothe furnace. Beyond the guillotine door within the furnace is disposed a sloping grate. d which,- in the form illustrated, is provided with steps. On this grate `the fuel moves by gravity, being dried and partly consumed in its downward path. ln my preferred form, at the lower end of the step grate d' are disposed blast bars e formed with a plurality of openings B on-their upper surfaces and connected by air pipes f, f, supplied with air under pressure by a fan (not shown) located outside the furnace. Preferably intermediate these blast bars are disposed a series of movable grate bars, which, in the illustrative form, are rocking bars g adapted to rock on pivots h and operable by means of arms si and a connected link y' extending outside the furnace by a handle 7a. Above the step grate d is located a sloping arch Z which projects into the main lcombustion chamber of the boiler, and for this reason is capable of radiating sufcient heat to drive off superfluous moisture from the fuel passing over 'the step grate.

The lower portion of the furnace consisting of the movable bars forming a horizontal grate located adjacent to the bridge wall as illustrated, and forced draught bars serves to deal with the charcoal formed in the furnace due to the formation of fine ash around the wood fuel, which fine ash prevents the necessary oxygen lfor combustion coming into contact with the wood or the like to be burned. By means of the movable bars, the mixture of carbon and ash is agitated so as to free the surface of the carbon and by means of the forced draught bars,

the necessary amount of oxygen is 'provid-v ed to vensure perfect combustion.

What claim and desire to secure by Letters Patent of the United States is l. In a boiler furnace for burning wood,l

rnegasse and the like, a sloping grate, a horizontal grate having movable parts and located at the lower end of the sloping grate and arranged to receive fuel therefrom, pipes leading from the front of the furnace for supplying forced draft to the horizontal grate only, and a sloping roof extending over both the sloping and the horizontal grates for directing the radiated heat from the fuel bed on the horizontal grate against the fuel bed on the sloping grate.

2. In a furnace for burning Wood, megasse and the like, a sloping grate, a horizontal grate at the lower end of the sloping grate and arranged Ito receive fuel therefrom,

pipes leading from the front of the furnace n for supplying forced draft to the horizontal grate only, and a sloping roof arranged to provide a chamber increasing in height from the front to the rear of the furnace and eX` tending over both the sloping and the horizontal grates for directing the radiated heat from the fuel bed on the horizontal grate against the fuel bed on the sloping grate, the horizontal grate comprising stationary forced blast bars and rocking bars, whereby the Afuel on the horizontal grate is kept free of ash from the fuel and air is supplied to the fuel to complete combustion thereof.

3. In a furnace for burning wood, megasse and the like, a bridge wall, a sloping grate, a horizontal grate located adjacent the said bridge wall at the lower end of the sloping grate and arranged to receive fuel therefrom.; pipes leading from the front of the furnace for supplying forced draft to the horizontal grate only, and a sloping roof arranged to provide a chamber increasing in height from the front to the rear of the furnace and extending over both the sloping and the horizontal grates for 'directing the radiated heat from the fuel bed on the horizontal grate against the fuel I bed on the sloping grate, the horizontal gra-te comprising stationary forced blast bars and rocking bars, whereby the fuel onv the horizontal grate is kept free of ash from the fuel and air is supplied to the fuel to complete combustion thereof.

4. yIn a furnace for burning Wood, rnegasse and the like, a bridge Wall, a stationary sloping grate, a horizontal grate located adjacent the said bridge Wall at the lower end of v.ing the radiated heat from the fuel bed on the horizontal grate against the fuel bed on thesloping grate7 the horizontal grate comprising stationary forced blast bars and rocking bars, whereby the fuel on the horizontal grate is kept free of ash from the fuel and air is supplied to the fuel to complete combustion thereof.

al1 Si MACKAY.