US616742A - Furnace - Google Patents

Description

No. 6|s,742. Patented Dec. 27, |893. J. A. SNYDER & G. H. HEITZMAN, 1R. FURNAGE.

(Application filed Apr. 8, 1898.) (No Model.)

A TTOR/VEY l@ Jolie/UZ fff f ,s7? ,d L :Es f f A E a@ /f H .fr EMM mw M iwf V FFICE@ Nrrnn STATES JOHN A. SNYDER AND GEORGE Il. IIEITZMAN, JR., OF PITTSBURG,

PENNSYLVANIA.

FU RNACE.

SPECIFICATION forming part of Letters Patent N o. 616,742, dated December 27, 1898.

Application iiled April 8,1898, Serial No. 676,907. (No model.)

.To all whom t may concern:

Be it known that we, JOHN A. SNYDER and GEORGE H. HEITZMAN, Jr., citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Furnaces, of which the following is a specication, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in furnaces; and it relates particularly to a device by means of Which steam is projected along the walls of the furnace so as to prevent the accumulation of cinders or clinkers upon said walls, while at the same time assisting in the increasing of the draft and promoting a more perfectcombustion vwithin the combustionchamber. To accomplish these results, We arrange beneath the grate-bars of the furnace a perforated pipe which extends along each wall of the furnace and is connected by a supply-pipe to the dome of the boiler or at another suitable point, so that live steam may be fed regularly into the said perforated pipe. On that portion of the pipe which extends along the front of the furnace we may provide the same with perforations only in front of the dome, so that no steam will escape from the pipe at a point adjacent to the furnace-bars. XVe also prefer to provide the two ends of the perforated pipe with blow-off cocks, so that in event of the said pipes becoming clogged these cocks may be opened.

and an increased force of steam turned into the perforated pipe, so as to drain the sediment therefrom. Ve Aalso provide the said front pipe with a cook or valve, by means of which the steam may be shut oif entirely from vthis pipe, if desired.

In most furnaces at the present time it is difficult to prevent the accumulation of elinkers upon the side and bridge walls, and these clinkers tend to injure thedraft of the furnace, hindering the perfect combustion of the same, increasing the amount of fuel required to attain the desired heat, besides largely increasing the labor of ring a furnace, as well as increasing the cost of repairs, as the removal of these clinkers necessarily injures the brickwork to a large extent, so that in a short time it is necessary to repair or replace the same. To overcome all these objections and to provide a device whereby the greatest possible combustion of fuel will be obtained, the draft will be strengthened, the smoke will to a large extent be consumed, a saving of nre-brick, a saving of labor and repairs, to attain a more easy working of the firing, to provide a device which will be noiseless in its operation, a device which will require but a small amount of space, and which may be applied to any furnace and which will be extremely simple in construction are the objects of our invention, and we will now more speciically describe the same by reference to the accompanying drawings, in which- Figure l is a perspective view of the furnace, partly broken away, showing our im- 7o proved fuel-consumer and clinker-remover in position. Fig. 2 is a top plan view of a por-A tion of a furnace with the grate-bars partly broken away to show the arrangement of the perforated pipes.

To put our invention into practice, we provide the four pieces of pipe ct, o, c, and d, said sections o and c being placed in close juxtaposition to the side wall e of the furnace, the section CZ being placed in a similar manner along the bridge-wall f of the furnace, and the section ct being placed along the front of the furnace or directly underneath the grate-bars g. These sections of pipe are or may be secured to the said walls by means of staples t driven into the brickwork or masonry, or other desirable fastening means may be provided for same. are connected to the section cl by means of the unions lo, while the said section b at its other end and the section a are connected by a three-way union Z, to which is also attached the supply-pipe m, which conducts the -steam from the dome or other source of supply to the aforesaid pipes within the furnace. The sections b, o, and d are each provided throughout their length on their upper face with per forations n, which in the pipe d are so arranged that they will be directly between each of the grate-bars in order that the latter may The sections b and c IOO 4front of the furnace-doors.

offer no resistance to the jets of steam emitted through the said perforations. The pipe or section a may be provided With these perforations at that portion of the pipe which is in juxtaposition to the jambs o with the balance of the pipe unperforated, so that no steam will be projected therefrom directly in If desired, this pipe a may be provided with a controlling valve or cock p in close relation to the union Z, so that the steam may be entirely shut off from the pipe Ct if such may be found desirable. We also preferably provide the free end of the pipe or section a with a blow-off cock or valve q, and provide the free end of the pipe or section c with a similar blow-off cock or valve r.

To regulate the quantity of steam admitted into the pipes, the supply-pipe m is provided with a controlling valve or cock m', which may be arranged in the position shown or at any other desired position upon the supplypipe.

Vhile the device is herein shown as applied to a Single furnace, it willof course be readily understood that it can be arranged to accommodate any number of furnaces, each being fed from the onecommon supply-pipe. In practice we have found that a very small amount of steam admitted into the perforated pipes has been suflicient to keep the walls of the furnace entirely free from clinkers, and thereby tending to greatly increase the combustion within the furnace and decreasing the labor necessary to retain the desired heat, The obviation of the clinkers accumulating upon the side and bridge walls has also been found to largely increase the life of the Wall, as the Work of removing the clinkers necessarily damages the walls to a great extent, so that in a short time it is absolutely necessary to repair or remove the same.

By arranging the pipe that is in juxtaposition to the bridge-wall so that the perforations will come directly between the gratebars no obstruction is offered to the steam emitted throughsaid pipe.

In case the pipes should accidentally become clogged by sediment settling through the apertures thereof the opening of the blowoff cocks to the valve l and the increase of the steam-pressure by opening the valve ml will permit the ejection of all such sediment from the pipes. We have also found that by such a construction the smoke is, to a great extent, consumed, as the hot blast from under the grate, passing up through the live coals, brings the clear flame into contact with the smoke when it reaches the bridge-Wall, and thereby causes the same to be consumed.

Such a device can readily be applied to any form of furnace without in any manner interfering with the ordinary construction of the same.

Having fully described our invention, what We claim as new, and desire to secure by Letters Patent, is-

In combination with a furnace of pipes a, Z2, c and d connected together in substantially a rectangular form within the furnace and below the grate-bars, the pipes a and c having a blow-off cocksecured to their free ends, said pipes l), c, d being provided with perforations, at predetermined distances apart so the same will be opposite the openings in the grate, a steam-supply pipe secured to an elbow connecting pipes a and l), said pipe a being provided with perforations at a central point, and a Valve for regulating the supply of steam, substantially as shown and described.

In testimony whereof We affix our signatures in lthe presence of two Witnesses.

JOHN A. SNYDER. GEORGE H. HEITZMAN, JR.

lVitnesses:

A. M. WILSON, JOHN GROETZINGER.

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