US538274A

US538274A - Steam-boiler furnace

Info

Publication number: US538274A
Authority: US
Publication date: 1895-04-30
Anticipated expiration: 1912-04-30

Description

(No Model.) 5 Sheets-Sheet 1.

0. D. ORVIS.

STEAM BOILER PURNACE.

No. 538,274. Patented Apr. so, 1895.

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STEAM BOILER PURNAGE.

No. 538,274. PatentedApr. 30, 1895.

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STEAM BOILBR FURNAGE..

No. 538,274. Patented Apr. 30, 1895.

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0. D. DEVIS. STEAM BOILBR PURNAGE.

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5 Sheets--Sheet 5. O. D. ORVIS. STEAM BOILER PURNACE.

No. 538,274. Patented A131130, 1895.

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STEAM-BOILER FU RNACE.

SPECIFICATION -forming part of Letters Patent No. 538,274,6.ated April 30, 1895.

Application filed July 16, 1894;. Serial No. 517,647. (No model.)

ToaZZ whom, it may concern:

Be it known that I, OREL D.- ORv'Is, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Boiler Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as'will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. l

My invention relates to steam boiler furnaces. lts object is to economize fuel by securing practically complete combustion; and applying the heat to the boiler surface in such manner as to attain high efficiency in steam production. To secure these results, I use two grates, inclosing each with a low arch from the rear end of which the products of combustion are discharged into a combustion` chamber located between two bridge walls and opening to a iiue below the level of the grates and extending forwardly and discharging upwardly through a narrow longitudinal aperture directly u/pon the crown sheet of the boiler.

The invention consists further in various minor details of construction hereinafter fully described. l

In the accompanying drawings, Figure l is a transverse vertical section on the line I 1 of Fig. 3. Fig. 2 is a plan section taken immediately below the boiler. Fig. 3 is a longitudinal vertical section on the line 3 3 of Fig. 2, the boiler being in elevation. Fig. 4 is a similar view on the line 4 4 of Fig. 2. Fig. 5 is a transverse vertical section on the line 5 5 of Fig. 3, and Fig. 6 is a transverse vertical section of the flue below the grates showing one form of construction..

Essential to the complete combustion of the iniiammable gases set free by the initial combustion of the fuel is the maintenance of a high temperaturevuntil'the desired result is attained. Contact of the gases with water surfaces must be avoided, and hence the most common construction of smoke-burning furnaces leaves the forward portion of the boiler to be heated through masonry, the gases being led back through combustion fines until complete iniiammation has been accomplished. Y

In the furnace forming the subject of this application, I have attained complete combustion while throwing the hot vapor resulting therefrom upon the forward end of the boiler, and carrying it thence along its-entire length.

I show in the drawings the ordinary front Space being provided between itand the arch.

Between the two bridge walls, D, F, there is a combustion chamber, d, extending downwardly and opening forwardly through the wall, D, into a flue, G, below the level of the grates, and extending forwardly to the front wall, A, and having a narrow longitudinal opening along its upper side through which the products of combustion make their exit, passing upwardly between two arches, E, E, and being delivered directly upon the crown sheet of the boiler, B, and carried back over the bridge wall, F. Upon the top of the wall, D, I place some fire-brick, h, spaced apart so that the carbonio oxide circulates among them and they become highly heated. The flue, G,

terminates atthe rearward side of the wall,

D, and a plate, H, closes the .space between the two arches, E, E, from that line back to the face of the wall, F, so that the smoke is forced down to the mouth of the flue, G.

The flue, G, is shown in Figs. 1, 2, 3, ande as a steel water shell, having its edges, g, g, upturned and prolonged in parallel planes to the altitude of the bridge wall,D. A service pipe, K; leads from .the bottom of the boiler, B, at its rearward end and enters this water shell at its rearward end and at its lowest point. Two return pipes, L, L, lead from the top of the forward end of its upturned edges, g, g, to the boiler, so that provision is made for free and rapid circulation.

IOO

If desired the iiue may be of masonry as shown at G', in Fig. 6, and metal sheath, g', may be used to bind it together.

The discharge aperture of the flue, G, is so narrow that the draft is carried throughout its length. To insure this result the. rearward portion of this aperture may be closed in part by brick, as h', h', spaced apart.

Combustion is complete in the chamber, d, where the two currents meet directly below the plate, H, so that the temperature within the iiue, G, is very high and the development of steam in the water shell forming itsY walls is very rapid.

The minor features of the furnace shown but not already described are the T-beams, E, running from the wall, A, to the wall, F, for supporting the inner ends of the arches, E, their outer ends being set inthe walls, A', A; the feed pipe, lo, entering the service pipe, K, and thefpipes, Z, l, l, leading forwardl from the water shell andproviding means for cleaning it.

This furnace is of especial value for the consumption of anthracite coal. The low arches, E, E, become highly heated and the inflammation of the carbonic oxide continues, showing a blue flame, from the front. of the fire-boxes through 4the passages over the bridge-wall, D, the inliammable gases being entirely burned before reaching the water surface of the flue, G.

I claim as my inventionl. In a steam boiler furnace, the combina.- tion with the inclosing walls, a pair of gra-tes and with a bridge wall, F, of an arch cover ing each grate from the front wall of the furnace to the bridge wall, F, and forming therewith a fire boX, a flue leading forwardly from the bridge-wall and being in communication i with the tire boxes, such tiue being located below the tire-boxes and opening upwardly b etween the arches, substantially as described and for the purpose set forth.

2. In a steam boiler furnace the combination with a pair of inclosed lire-boxes and with a steam boiler located above the fireboxes, of a flue located between the fireboxes and leading from the rearward end thereof and having a discharge opening along its upper side, whereby the products of combustion are delivered against the forward portion of the boiler, substantially as described. and for the purpose set forth.

3. In a steam boiler furnace the combination with inclosed fire-boxes, of a masonry inclosed combustion chamber at the rear of the fire-boxes and open thereto, and a fiue leading forwardly from such chamber and having a discharge opening along its upper side, substantially as described.

4. In a steam boiler furnace the combination with the boiler, a pair of fire-boxes and their grates, a solid arch inclosing each firebox, and a bridge-Wall, F, closing the rearward end of such arches, of abridge-wall, D, located forward of the wall F and forming therewith aA combustion chamber' extending below the level of the grates, and a flue located below the grates and leading forwardly from the combustion chamber and having a discharge opening along its -upper side, substantially as described.

5. In a steam boiler furnace the combination with the boiler, a `pair of fire-boxes and their grates, a solid arch inclosiug each firebox, and a bridge-wall, F, closing the rearward end of such arches, of a bridge-wall, D, lo-

cated forward of the wall F and forming therewith a combustion chamber extending below the level of the grates, a flue located below the grates and leading forwardly from the combustion chamber and having a discharge open-ing along its upper side, the walls of such flue being a Water shell, and water pipes connecting such water shellwith the boilcr,.sub stantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

OREL D. ORVIS.

Witnesses:

LOUIS K. GILLsoN, SPENCER WARD.