US760172A - Slag-furnace. - Google Patents

Description

No. 760,172. v PATBNTED MAY 17,1904. R. BAGGALEY a o. s. GARRETsoN.

SLAG FURNAGB.

APrLIoATIoN FILED PEB. 2o, 1902. v No MODEL. I a sHvnB'rs-snnm' 1.

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No.4 760,172. PATENTED MAY 17, 1904.

R. BAGGALEY 6L 0. S. GARRETSON. A

SLAG FURNAUE.

APPLICATION IILBD PEB. 20, 1902. V N0 MODEL. 3 SHEETB-SHEET 2.

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. 'PATBNTED MAY 1v, 1904. R. BAGGALBY 6.-. o. s. GARRETSGN.

SLAG FURNAGE.

APPLIGATION FILED rma. zo. 1902.

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UNITED STATES e Patented May 17, 1904.

PATENT OEEIcE.;N

RALPH BAGGALEY, OF PITTSBURG, PENNSYLVANIA, AND OLIVER S. GAR- RETSON, OF BUFFALO, NEW YORK, ASSIGNORS TO GARRETSON FUR- NAOE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF WEST VIRGINIA.

SLAG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 760,172, dated May 1*?, 1904.

Application filed February 20, 1902. Serial No. 94,864. (No model.)

10 all whom it may concern:

Be it known that we, RALPH BAGGALEY, re- 'siding at Pittsburg, in the county of Allegheny, in the State of Pennsylvania, and OLI- VER S. GAnRnTsoN, residing at Buffalo, in the county of Erie and State of New York, citizens of the United States, have invented new and useful Improvements in Slag-Furnaces, of which the following is a specification.

This invention relates to a furnace for utilizing the heat contained in molten slag to heat a steam-boiler or other vessel or apparatus and in which the molten slag is carried past the heating-surface of the boiler or other vessel or apparatus by an endless flexible carrier.

The object of the invention is to produce a furnace of this nature which is very simple in construction and easy of operation and in Y which the heat contained in the slag is fully utilized.

In the accompanying drawings, consisting of three sheets, Figure l is a sectional elevation of a steam-boiler furnace embodying the invention. Fig. 2 is a horizontal section through the furnace on the line 2 2, Fig. l. Fig. 3 is a sectional elevation of a furnace of slightly-different construction.

Like letters of reference refer to like parts in the several figures.

A represents a closed heating-chamber or furnace of any suitable form or construction, in which the steam-boiler B or other vessel or apparatus to be heated is arranged in any suitable manner. As shown in the drawings, the furnace is rectangular and of considerable height, the inclosing walls being made of or protected by some suitable non-conducting material to better retain the heat. The boiler, which, as shown in the drawings, is of the upright-water-tube type, is arranged in a slightly-inclined position in the heating-charnber. The boiler is supported in any suitable manner-for instance, as shown, by horizontal beams I).

D represents the endless carrier for elel vatingthe molten slag from the slag-receptacle and carrying the same up into close proximity to the heating-surface of the boiler or other apparatus, so as to impart the heat of the slag to the same. As shown in the drawings, Figs. 1 and 2, the endless carrier is composed of a series of endless chains hung side by side in the form ofloops from a series of sheaves or pulleys E, arranged in the upper part of the heating-chamber, so that the lower ends of the chain-loops dip into themolten slag in the receptacle, whereby the chains become coated with the molten slag. The supporting-sheaves for the carrier-chains are arranged above the boiler and mounted on a horizontal shaft e, supported at its ends in any suitable manner. The upwardly-moving runs of the carrier-chains `pass through openings e' c2, provided for this purpose in the upper and lower heads of the boiler and run between adjacent rows of the boilertubes.

The carrier-chains are driven by any suitable Ineans, but preferably by sprocket-wheels F, which are arranged in pairs `on opposite sides of the downwardly-moving runs of the chains. The several sprocket-wheels, which are arranged on the same side of the several chains, form a set and are secured to the same shaft f. The shafts of the two sets extend through the opposite walls of the heatingchamber and are journaled outside of the chamber in bearings f These shafts are driven in opposite directions by any suitable mechanin the closed heating-chamber.

ism to cause each pair of sprocket-wheels to grip the carrier-chain and propel the latter in the proper direction. The mechanism shown for driving these shafts consists of a driving sprocket-wheel f2, secured tothe end of one of the shafts, and a pair of gear-wheelsf3, connecting the shafts.

The sprocket-wheels F for driving the carrier-chains also serve to detach the congealed slag from the chains by gripping the latter, and thereby breaking and detaching the slag which adheres to the chains as a thin film or scale, and which by the time it reaches these sprocket-wheels has become so brittle as to be easily detachable from the chains. This congealed or chilled slag as it is removed from the carrier-chains by the sprocket-wheels is between adjacent tubes and the flanges ofv which extend toward each other on the front and rear sides of the tubes. The beams thus incase the tubes and prevent the carrier-chains or any slag which might drop from the same from coming in contact with the tubes and injuring the same. I

K represents a shield or wear-plate which extends through the opening in the lower boiler-head.. The upwardly-moving runs of the carrier-chains bear against this shield, which wipes any surplus molten slag from the chains and prevents contact of the latter with the adjacent side of the opening @2 in the lower In the form of the furnace shown in Fig. 3 the tubes of the boiler are arranged in vertical rows and two endless carriers D are employed, each composed, as in the first-described construction, of a series of chains hung in loops on a series of sheaves E. Each run of each carrier-chain is located between two rows of boiler-tubes. The chains are each driven by Aopposite sets of sprocket-wheels F', which also serve to detach the chilled slag. The. latter is conveyedby chutes G, one for each carrier,

from the furnace and discharged into a car or other receptacle H.

In both forms of the furnace the receptacle for the molten slag is located beneath the boiler The heat con tained in the slag is thereby confined within the chamber and utilized partly by carrying the slag past the heating-surface by means of an endless carrier and partly by radiation from the body of slag in the receptacle. As there is always a considerable body of the molten slag in the receptacle beneath the boiler or other vessel, the latter is evenly heated and the slag in the receptacle is kept from cooling.

XVe claim as our invention4 l. The combination of a steam-boiler, or the like, having an upright heating-passage, a receptacle for molten slag arranged below said heating-passage, an endless traveling slag-carrier suspended in the form of a loop which dips with its lower portion into the slag-receptacle,

velevating slag therefrom and passing with its ascending portion, coated with molten slag, through said heating-passage for imparting heat to said boiler, and mechanism acting upon the carrier after it has passed through said heating-passage for detaching the congealed slag from the carrier, substantially as set forth.

2. The combination of a steam-boiler, or the like, having upright heating-passages, a receptacle for molten slag arranged beloiv said passages, an endless traveling slag-ca1trier suspended in the form of a loop which dips with its lower portion into the slag-receptacle, elel vating slag therefrom and passing with its ascending and descending portions through said passages, and mechanism acting upon the carrier after it has passed through said passages for detaching the congealed slag therefrom, substantially as set forth.

3. The combination of asteam-boiler, or the like, having a heating-passage, a receptacle for molten slag located below said passage, an endless traveling slag-carrier which dips into said receptacle, elevating slag therefrom and passing with its ascending portion through said `heating-passage, and wheels between which said carrier runs and which are arranged beyond said heating-passage for detaching the congealed slag from the carrier, substantially as set forth.

4. The combination of a heating-chamber provided in its lower portion with a receptacle for molten slag, an apparatus to be heated arranged in said heating-chamber above said slag-receptacle, an endless iiexible carrier suspended in said heating-chamber in the form of a loop, one run of which extends through a space in said apparatus, and means for driving said endless carrier to elevate the slag through said space in said apparatus, substantially as set forth.

5. The combination of a heating-chamber, a receptacle for molten slag located in said chamber, an endless flexible carrier located in said chamber and which extends into said slag-re- IOS ceptacle, and wheels for driving said endless means for discharging the detached slag from said chamber, substantially as set forth.

ln testimony whereof we have signed our names to the specification in the presence of two subscribing wltnesses.

RALPH BAGGALEY. OLIVER S. GARRETSON.

Witnesses to the signature of Ralph Baggaley:

MALCOLM L. MACDONALD, AZELLE E. HOBART. Witnesses to the signature of Oliver S. Garretson:

JNO. J. BONNER, CLAUDIA M. BENTLEY.

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