USRE5999E - Improvement in smoke-burning furnaces - Google Patents

Description

.'A.' roan. Smoke Burning Furnaces.

2 Sheets-Sheet 1 WITNESSES.

WE GRAPHIC CD. PHOTO -LITH.39&4I PARK PLACE,N-

S. A; FORD- 2Sheets--Sheet2.' Smoke Burning Furnaces.

Reissued Aug. 4,' 1874.

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THE GRAPHIC C0. PHOYO-LITHJQI 44 118K PLAE,N.Y.

UNITED STATES SAMUEL A. FORD, OF

INTEREST CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF I TO E. L. COLLINS.

IMPROVEMENT IN SMOKE-BURNING FURNACES.

Specification forming part of Letters Patent No. 143,004, dated September 23, 1873; reissue No. 5,999, dated August 4, 1874; application filed June 2, 1874. I

To all whom it may concern:

Be it known that State of Illinois, have invented a new and useful Improvement in Smoke-Burning Furnaces, of which the following is a specification:

My invention is especially adapted for use in connection with steam-boilers and heatingfurnaces, but I shall more particularly describe its application to steam-boilers, it being observed that in the case of heating-furnaces the top wall of the furnace corresponds to the bottom of the boiler, as herein described or referred to. The object of my invention is to provide a cheap and efficient method of promoting the combustion of volatile hydrocarbon and other gases, which, in passing off as smoke, occasion great loss of heat, and consequent waste of fuel. To accomplish this purpose, I construct, in the following manner, chambers for heating and distributing air, and intimately mingling the same with the gases at the point where the highest temperature, and hence the greatest expansion, of the gases is usually obtained. The space immediately in rear of the bridge-wall in general use is bricked up as far as may be required or desirable, for the purpose of constructing within this brick-work, or, when the space is limited, in part within it and in part within the bridgewall, an air-chamber'of sufficientcapacity, the size of the same being in all cases governed by the size of the boiler and the quantity of coal to be consumed per hour. The top of this brick-work is either on a line with the top of the bridge-wall or in some cases dropped a little below it. At a convenient distance in the rear of this air-chamber-a'similar, but usually smaller, air-chamber is constructed, parallel with the same, and connected therewith by means of pipes, or, when the same is more convenient, by means of continuous brickwork, having flues constructed within it, the air in its passage through these pipes or fines being heated to the desired temperature. Immediately under and dependent from the bottom of the boiler, and over the bridge-wall and air-chamber first mentioned, there is also constructed, by means of a hollow arch or hollow I, SAMUEL A. Form, of the city of Chicago, in the county of Cook and arches, another air-chamber, connectedwith the one beneath it, and first described, by means of passages or spaces at the ends of the arch or arches. This upper air-chamber is deflected, so as to make the space between the top of the arch or arches and the bottom of the boiler at the rear end of the chamber larger than at the front. These air-chambers may be constructed of any material capable of resisting a high temperature. A small jet of steam is taken, by means of a suitable pipe, from the dome of the boiler, and may be introduced into either of the two lower air-chambers; but the mode of using the same which I have shown in the drawings forming a part of this specification 1 have found the most effective, for by means of openings in the steam-pipe opposite each pipe or passage connecting the rear air-chamber with the one in front of it the supply of air is readily controlled, and thereby also any defect in the draft is entirely obviated.

In the accompanying drawings, Figure 1 is a perspective view, one side of the furnacewall being removed to show the grate, fire-box, bridge-wall, and air-chambers. Fig. 2 is a side elevation with furnace-wall removed. Fig. 3 is a transverse vertical section on line K K of Figs. 1 and 2. Fig. 4 is a vertical. longitudinal section on line L L of Fig. 3.

A represents an ordinary boiler; B, the firebox; C, the bridge-wall; D, E, and H, the airchambers; Gr, the pipes or passages connecting the two lower air-ch ambers together, and for heating the air; I I I, small orifices for minutely distributing the air; F F, anarrowopening lengthwise of the air-chambers E and D, for a similar purpose; and O O 0, small openings through the upper wall of D and lower wall of E, for the same purpose. J is the steam-pipe.

The operation of my invention is as follows: The fire having been built in the fire-box'B in the ordinary manner, the airchambers and their connections are soon 'sufiiciently heated to employ them for the purpose had in view with efiect. Air is then admitted in any desired quantity through the walls of the boiler setting into the air'chamber H, the air being,

during its passage through this air-chamber and through the pipes G, or corresponding fines constructed in the brick-work, and into the airchamber D, heated to the same temperature as the gases, and is mingled with the gases by passing out through the openings F F and the small orifices I I and O O O.

The openings F F and orifices O O 0 may be constructed on an angle, as shown in the drawings, for the purpose of bringing the currents of air from the upper chamber E and center-line within a reasonable space thereby effecting a perfect or nearly perfect commingling of the air and the gases, and hence prodncing amore perfectcombustion.

The number and size of the orifices I I I and O O 0 may be increased or diminished, accord ing to the size of the boiler and the amount of coal consumed;

What I claim, and desire to secure by Let- 15ers Patent, is

l; The combination, in a smoke-burnin g furnace, of the air and steam mixing chambers H and D, forming the bridge-wall, connectingtnbe G, and steam -pipe J, connected to a steamchamber, substantially as and for the purpose set forth.

2. The tapering air-chamber E, forming a funnel-shaped passage, the lower and back wall of said chamber being perforated, in combination with a furnace, constructed substantially as described, and in the' manner specifled.

SAMUEL A. FORD.

Witnesses:

J OHN F. GoLLINs, J. G. KING.

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