US1672532A - Furnace - Google Patents

Description

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ATTORNEYS.

D. s. JAcoBus ET 'AL FURNACE Filed July 7, 1925 June 5, 1928.

June 5, I928.

FURNACE Filed July '7, 1923 3 Sheets-Sheet 3 BY whee M ATTORNEYS l ENTORS Patented June 5, 1928.

UNITED STATES PATENT OFFICE.

DAVID S. JACOIBUS, OF JERSEY CITY, NEW JERSEY, AND WILLIAM A. JONES, OF WEST NEW BRIGHTON, NEW YORK, ASSIGNORS TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

FURNACE.

Application filed July 7, 1923.

Our invention relates to new and useful improvements in a furnace.

One of the objects of our invention is the provision of a furnace adapted for burning oil and comprising an inclined furnace wall in which one or more oil burners are set.

Another object of our invention is the provision of a furnace having means for converting the same from an oil-burning furnace toa coal-burning furnace, or vice versa, at will.

Other objects of our invention will appear in the specification, and will be particularly pointed out in the claims.

Our invention will best be understood by reference to the accompanying drawings in which, Figure 1 is a vertical sectional elevation of a steam boiler and furnace embodying our invention; Fig. 2 is a detail sectional View illustrating the inner inclined furnace wall which is used when the furnace is to be used for burning coal; Fig. 3 illustrates a modified form of our invention in which the oil burners in the inclined wall are horizontal, and Fig. 4: illustrates a further modification in which the oil burners are supplied with a forced draft.

Referring, now, to the drawings, and first to Figs. 1 and 2, 10 is a main furnace wall for the front of the setting, and 11 is the rear wall of the setting, the wall 10 being supported on I-beams 12, while the part of the wall 11 coming above the outlet flue is supported on I-beams 13. A bridge wall 14 is disposed at the rear of the combustion chamber 15. An inclined wall 16 is supported on a plate 17 extending transversely of the furnace chamber and forms, at 18, a sliding joint with the inner face and lower portionof the' main wall 10. The plate 17 is located immediately above a stoker 19, which is illustrated as of the underfeed type and provided with a hopper 20. The oil burner or burners 21 are set in the inclined wall 16 and preferably, though not neces- 23, which is, in turn, preferably supported on the same supporting member 17 as the Serial No. 649,985.

wall 16. A removable floor 24:- is also provided for the furnace, which engages the stationary wall portion 23, as indicated, when the furnace is to be used as an oil-burning furnace, the inclined wall 22 being removed, of course, under these conditions. The wall 22 thus covers the oil burners 21 and affords protection thereto when the furnace is burning coal, and the floor 2 1 covers the stoker 19 and protects the same from the flame when the furnace is burning oil.

We have illustrated our invention in Fig. 1 in connection with a water tube boiler of the Stirling type, though it will, of course, be'understood that the furnace may be used in conjunction with any type of boiler. The boiler here illustrated comprises three upper steam and , water drums 25, 26 and 27, connected to a lower mud drum 28 by banks of tubes 29, 30 and 31, respectively. The rear drum 27 of the boiler is connected to a second mud drum 32 by a bank of tubes 33 which forms an economizer section, the feed water preferably being introduced to the mud drum 32. The front steam and water drum 25 is connected to the middle steam and water drum 26 by steam circulators 34 and water circulators 35, while the middle steam and water drum 26 and the rear steam and Water drum 27 are connected by steam circulators 36. The gases from the furnace are directed along the water tubes of the boiler by'bafiles 3'7, 38, 39 and 40 arranged in the manner indicated, a superheater 41 preferably being disposed between the baflie 37 and the bank of tubes 30. The steam is taken from the rear steam and water drum 27 by an outlet pipe 42.

In the boiler illustrated in Fig. 1, the gases passing upwardly from the furnace flow along the front bank of tubes 29, then downwardly back of the baffle 37, over the superheater 41 and the bank of tubes 30, then upwardly over the bank of tubes 31, and downwardly over the bank of tubes 33 to the outlet flue 43. Some of the tubes of th front row of the bank 31 may be connected to the middle steam and water drum 26 to form a support for a bafile 44, which confines the gases in the upward pass over the bank of tubes 31 to the tubes of this bank.

Fig.3 illustrates a modification of the arrangement shown in Fig. 1, with the oil burners 21 set in the wall 16 horizontally and at an angle to the wall, instead of perpendicularly to the wall, as shown in Fig. 1.

Fig. 4 illustrates a further modification, in which a forced draft is supplied to the oil burners, a duct 45 or a plurality of such ducts (0111 one being shown in the drawing), supp ying air under pressure from the main blast duct 46of the stoker, which also communicates with the ash-pit 47 beneath the stoker 19 through an opening 48.

By inclining the auxiliary wall in which the oil burner or burners are set, the tiling, which comes inside of the wall, can be made of a lesser thickness than would be the case if the wall were vertical, as when the Wall is inclined, the Weight component of the tiling is reduced, and it is therefore unnecessary to provide as substantial tiles as where the wall is vertical. lt is advantageous to reduce the size of the tiling and thickness of the wall, as the thinner wall.

will not interfere with the action of the flame and will stand up better than a thick er wall.

Another advantage of inclining the auxiliary wall in which the burners are mounted, is that it gives a better opportunity, particularly where the floor of the furnace is inclined rearwardly in the manner shown, for the flames which are projected into the furnace by the lowermost line of burners to take their natural path of travel. The natural path of travel for the flames from an oil burner is cone-shaped, the smaller end of the cone corresponding to the burner and the larger end of the cone projecting into the furnace. By inclining the wall, the axis of the flame from the oil burner, which is mounted in the auxiliary wall, is directed upwardly and given an opportunity to follow its natural path of travel, articularly wherethe floor 24: is inclined ownwardly and rearwardly.

Still another advantage of the auxiliary wall inclined outwardly is that it permits the wall 22 to rest in place without the use of stays. This is an important feature since the wall 22 is located where stays would be likely to burn out.

Another advantage of the wall as used in connection with the furnace where a sliding joint is provided at the top, is that the weight to be carried by the tiling, apart from any inclination of the wall, is reduced. It will readily be seen that muchlighter tiling and a thinner wall can therefore be used at the burners than should the burners be mounted directly beneath the front wall of the boiler and the entire weight .of the front wall carried above the burners.

In accordance with our invention, the furnace may be converted into an oil-burning furnace or a coalburning -furnace at will, it only being necessary to place in position the inclined wall 22 and remove the floor 24 of the furnace when it is desired to operate the furnace as a coal-burning furnace. In order to operate the furnace as an oil-burning furnace, the wall 22 is removed and the floor member 24 placed in position.

We claim 1. An oil-burning furnace comprising an inclined furnace wall composed of tile and anoil burner set in said wall, at substantially right angles thereto.

2. An oil-burning furnace comprising a furnace wall upwardly and outwardly inclined composed of tile, and an oil burner set in said wall with its axis at right angles to said wall.

3. An oil-burning furnace comprising a main furnace wall, an auxiliary wall inclined to the main wall and forming a sliding joint therewith, and an oil burner mounted in said auxiliary wall.

4. An oil-burning furnace. comprising a main furnace wall, an auxiliary wall inclined to the main wall and forming a sliding joint therewith, and an oil burner set in said auxiliary wall at substantially right angles thereto in position to direct the flame upwardly within the furnace chamber.

75. An oil-burning furnace comprising a main furnace wall, supporting members therefor extending transversely of the furnace, an auxiliary wallinclined to the main wall and forming a sliding joint with the.

main wall on the inner face of the latter, and an oil burner set in said auxiliary wall at substantially right angles thereto.

6. An oil-burning furnace comprising an inclined furnace wall, an oil burner set in said wall, and a floor for the furnace inclined downwardly and rearwardly.

-7. An oil-burning furnace comprising an inclined furnace wall, an oil burner set in said wall, and a supporting member for said wall adapted to support a protecting wall.

-DAVID S. JACOBUS. WILLIAM A. JONES.

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