US1364502A - Oil-burning boiler-furnace - Google Patents

Description

D. I. IRISH.

OIL BURNING BOLLER FURNACE. APPLICATION FILED IIAYIs. IsI.

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D. 1. IRISH. OIL BURNING BOILER FURNACI.v

APPLICATION FILED MAY I5, |918.

Patented Jan. 4, 1921.

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UNITED STATES PATENT OFFICE.

DAVID J. IRISH, OF BARBERTON, OHIO, ASSIGNOR TO THE BABCOCK & 'WILCOX COM- PANY, OF BAYONNE, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

OIL-BURNING BOILER-FURNACE.

Application filed May 15,

T 0 all whom t .may concern:

Be it known that I, DAVID J. IRISH, a citizen of the United States, residing at Barberton, in Summit county, State of Ohio, have invented a new and useful Improvement in Oil-Burning Boiler-Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 isa partial longitudinal vertical section of a Stirling boiler provided with my improved oil burning,l furnace; Fig. 2 is a section on the line II-II of Fig. 1 looking downwardly; Fig. 3 is an enlarged detail view on a. larger scale showing the burner arrangement with a modified form of hood; Fig. 4 is a' view similar to Fig. 3 showing another form of hood; Fig. 5 is a vertical section on the line V-V of Fig. 1, and Fig. 6 is a View similar to Fig. 5 showing separated air ducts for the burners.

My invention relates to the type of oil .burning furnaces for boilers where the burner pipes extend underneath the floor of the combustion chamber from the front of the ash pit and are provided with upwardly extending burners from which flames are projected forwardly into the combustion chamber.

The object of the invention is to simplify and improve the construction, to make the burners and burner pipes easily replaceable and removable, and to improve the efficiency of the structure.

In the drawings, referring to the form of Figs. 1, 2 and 5, 2 represents the mud drum of a Stirling boiler having the usual three banks of water tubes 3, 4 and 5 leading upwardly to the steam and water drums. The furnace may, of course, be used with any desirable type of boiler. The refractory tile floor 6 of the combustion chamber 7 is preferably inclined downwardly vand rearwardly from the front wall 8, and supported on suitable framework, such as the transverse I-beams 9. The transverse bridge wall 10 preferably has a straight plain front face at the rear of the combustion chamber and added to the front face of this bridge wall are the separating baies 11 and l12. These baffles are arranged as .shown in Fig. 2, so as to provide separators between the three burners 13 while affording long transverse slots 14 which communi- Specification of Letters Patent. l

Patented J an. 4, 1921.

191s. serial No. 234,707.

cate at their bottom ends with the ash pit space. The front portions of these slots are inclosed by the side extensions 15 of the separating baflles, the edges of which, in front of the boiler, are preferably chamfered or beveled forwardly and outwardly, as shown in Fig. 2, to allow for the diverging flames from the burners. The general shape of the flames is shown in dotted lines in Fig. 2. Over the tops of these separating battles extends the refractory roof or hood 16 which projects above the burners and aids in deflecting the llame outwardly through the combustion chamber, The burner pipes 17 extend underneath the floor, rest "on suitable transverse supports `18 and carry at their rear ends the right angle branch burner pipes 19. The burner pipes may be slid back under the floor with the branch pipes horizontally until they are at the rear of the floor, when, by reason of the slotted chambers 14, the burner pipes may turn upwardly into operative position, registering with the slots in the baffles. In front of each burner, the floonis preferably provided with slots or holes 20, and, as shown in Fig. 2, the group of slots in front of each burner is preferably arranged in fan-shape so as to supply air under the vdiverging fan-shaped flame from each burner. As shown in this form, the hood 16 extends continuously across the bridge wall and is recessed into it.

The vertical slots, behind which the burners are located, extend to the floor of the furnace chamber, and thus communicate throughout their entire height with the chambers 14. By this arrangement, an air space is provided to supply air directly from the air duct to the stream of oil and steam as it issues from the burner. The

, lighter oils are immediately burned and this,

in turn, causes a sudden and greater eX- pansion and atomization of the heavier oils as thev latter. are projected intoithe furnace chamber. This increased atomization lowers the quantity of steam that would be necessary for this purpose if the stream from the burner'were projected into the furnace chamber through a mere hole in the baffle wall. Particularly when the arrangementV just described is used, I find it desirable to space the rst air opening in the fan-shaped arrangement in the furnace floor away from the bridge wall, so as to give the lighter oils time to burn with the air sgpplied through the lower part of the vertical'slots, before a large quantity of air is supplied to the fuel stream through the floor.

In Fig. 3, I show a form similar to the first form except that the hood 16a is inclined forwardly and upwardly, y.resting partly on the bridge wall and partly on the separatingbaffles.

In-Fig. 4 I show a form similar to the first form except that 'the hood 16". is shorter and more or less rudimentary.

The ash pit may be one continuous chamber, as shown in Figs. 1, 2 and 5, or the air may be supplied to'each burner slot or ocket separately by means of the separatving partitions 2l shown in Fig. 6. This form of Fig. 6 is the same as the first form except for this separation of the ash pit into separate air ducts for the air flowing back to each burner.

In the form of Figs. l, 2 and 5, 22 are dempers at the front of the ash pit by which the air inlet thereto may be controlled.

In the form of Fig. 6 there will be one of these dampers foreach of the air ducts, while in the first form as -many of these dampers may be provided as may be desired.

The advantages of my invention result from the use of the transverse slots which allow the branch burner pipes to be turned up into position and from the continuous supporting of the hood top, burner plate on the bridge wall and extensions without any arches or complex brick structures.

The fan-shape of the air openings 2O aidsl in properl supplying air for complete combustion, w ile the front dampers control the air supplies desired.

What I claim and desire to secure by Let- .ters Patent of the United States is- 1. In an oil burning furnace, a bridge wall having a plurality of separatetrans- Verse pockets with openings into the combustion chamber, and a plurality of fuel pipes extending under the floor of the combustion chamber and each having an angular pipe'extension adapted to be moved up S into place within one of said pockets, and

a burner on the end ofeach pipe extension,

said openings being narrower than the ockets and located directly in front of the urners and extending dowI/iward to the ioor ofthe furnace.

2. In an oil burning furnace, a 'bridge wall having a plurality of separate transverse hooded. pockets with openings into` furnace.

the combustion chamber, a plurality of fuel pipes extending under the floor of the combustion chamber and each havingan angular pipe extension adapted` to be moved upl Hoor, a bridge wall at the rear of the floorand having a sdewise elongated pocket, a fuel pipe having lan angular extension arranged to--be moved up into place within the elongated pocket, a burner on the end of the angular extension, and air supply ports through the floor in front of the pocket and arranged in diverging form with the port nearest the pocket spaced from the bridge wall, said pockets 'being provided with an opening narrower than the pocket and located directly in front of the burner and extending downward to the floor of the 4. In-a furnace of the class described, a bridge wall having a substantially flat front face, an added baffle wall in front' of the bridge wall forming transverse pockets and provided with a top cover or hood extending horizontally and restin on the bridge wall and added baiie, and oil pipes extending under the floor and having angular extensions arranged to be turned into position within the pockets, substantially as described,

5. In an oil burning furnace, a combustion chamber having a hood projecting toward the chamber, an air duct beneath the chamber, the floor of the chamber having a chamber and the duct, a fuel pipe extending through the air duct to the slot, an angular pipe extension on the fuel pipe extending up through the slot and a single burner on the pipe extension and located be- -neath the hood, the fuelpipe, extension and burner being constructed and arranged to permit. the burner to be swun into position, through the slot by rotating the fuel p1 e.

n testimony whereof I have hereunto signed my name in the presence of two sub- Scribing Witnesses.

v DAVID J. IRISH.

Witnesses:-

A. G. KiRBY, E. W. ARNOLD.

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