US479767A

US479767A - Smoke-consuming apparatus for boiler and other furnaces

Info

Publication number: US479767A
Authority: US
Publication date: 1892-07-26
Anticipated expiration: 1909-07-26

Description

2 Sheets-Sheet 1.

(No Model.)

W. SMITH. SMOKE GONSUMING APPARATUS PQR BOILER 0R OTHER PURNAGES.

ted July 26, 1892.

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(No Model.) 2 Sheets-Sheet 2.`

` W. SMITH. SMOKE GONSUMING APPARATUS FOR BOILER OR OTHER PURNACES.

170.479,767. Patented July 26, 1892.

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WESLEY SMITH, OF TOLEDO, OHIO, ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, TO CHARLES W. MORRIS, JR., TRUSTEE, AND CHARLES IV. MOR- RIS, OF BOSTON, MASSACHUSETTS.

i SMOKlE-CONSUMING APPARATUS FOR BOILER AND OTHER FURNACES.

SPECIFICATION forming part of Letters Patent No. 479,767, dated July 26, 1892.

.Application filed March 10, 1892.

To coll whom it may con/cern,.-

Beit known that I, WESLEY SMITH, of Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Smoke-Consuming Apparatus for Boiler and other Furances, of which the following is a specification.

This invention has for its object to promote the combustion of fuel in fire-boxes or fur- 1 o naces, and particularly the fire-boxes of steamboilers, either stationary or locomotive.

The invention consists in the combination, with a furnace or fire-box, an air-compressor, and a conduit arranged to conduct compressed air to the fire-box and to subject said air to heat, of another conduit arranged to conduct external air at ordinary atmospheric pressure to the fire-box, the last-mentioned conduit being arranged to subject the air passing 2o through it to heat and conduct such heated air to the point where the compressed air is delivered by the compressed-air conduit, the arrangement being such that the jet of compressed air acts somewhat on the principle of 2 5 a jet of steam in an injector to induce a flow of air under ordinary pressure, the result being the supplying of a large volume of heated air to the fire-box.

The invention also consists in certain improvements relating to the construction and arrangement of the apparatus involved, all of which I will now proceed to describe and claim.

In the accompanying drawings, forming 3 5 part of this specification, Figure 1 represents a side elevation and partial section of a locomotive provided with apparatus embodying my invention. Fig. 2 represents a section on line 2 2, Fig. 1. Fig. 2n represents a section 4o on line 2a 2, Fig. 2. Fig. 3 representsa rear elevation of the tire-box of the locomotive shown in Fig. 1. Fig. 4 represents a section on line 4 4f, Fig. 1. Fig. 5 represents a longitudinal section of the fire-box and a portion of the boiler. Fig. 6 represents a longitudinal section of the fire-box and casing of astationary boiler, the boiler being shown in elevation. Fig. 7 represents an end View of the casing of the fire-box and boiler shown in 5o Fig. 6.

Serial No. 424,388. (No model.)

The same let-ters of reference indicate the same parts in all the figures.

I have shown my invention in Figs. 1, 2, 3,

4, and 5 applied to the fire-box of a locomotive, and I will first describe said appliance with reference to said figures.

a represents the furnace or tire-box, which is or may be of the usual general construction.

b represents an air pump or compressor, y which may be of any suitable construction 6o and supported at any suitable point, said pump being herein shown as provided with an air-inlet b.

b2 represents a conduit for compressed air extending from the compressorb and communicating with the interior of the lire-box, so that the air which 'is compressed and set in motion by the pump b will enter the fire-box to promote the combustion of the fuel. The compressed-air conduit is arranged so that it 7o will subject the air within it to heat before the air is delivered to the tire-box, so that the compressed air enters the fire-box in a heated condition. Any suitable means maybe used to heat the air,and for the purposes of myinvention it may be assumed that the conduit b2 passes through a portion of the lire-box, although I prefer to provide a casing b3 on the exteriorof the fire-box through which the compressed-air conduit passes, said casing being 8o arranged to receive heat from `the fire-box either by radiation from the wall against which the casing is placed orthroughfluesb4,connect ing the interior of the casing b3 with the interior of the iire-box, as shown in Fig. 5. When 8 5 the casing b3 is employed, I prefer to bolt or rivet it securely to one of the walls of the fire-box by means of flanges formed on said if l casing and to extend the conduit h2 back and forth through the casing in a suitable num- 9o ber of return-bends, as indicated in dotted lines in Fig. 3, for the purpose of giving the conduit a sufficient exposure to the heat. The conduit b2 terminates at its delivering end in a nozzle b5, which is arranged to deliver a jet of compressed air to the fire-box, said nozzle being preferably of the form shown in Fig. 2a, and arranged Within the tapering or conical nozzle c, which forms the delivering end of the secondary air-conduit, which will roo be presently described, said nozzles c and h5 resembling in their relative arrangement and form an injector, the jet of compressed air delivered by the nozzle b5 inducing a flow of air through the nozzle c and through the secondary conduit.

In Figs. l and 2 I have shown the conduit b2 as divided at h6, one division communicating with the casing b3 at one end and the other with the casing b3 at the other end of the fire-box, so that compressed air is supplied simultaneonsly at both ends of the nre-box. In Figs. 2 and 3 I show each compressed-air conduit as provided with a series of nozzles b5, so that airis delivered to the lire-box from each of the conduits in a series of jets or blasts. The supply of compressed air delivered by each nozzle may be regulated by means of ascreW-threaded spindle 197. (Shown in Fig. 2a.)

For the purpose of supplying a large volume of heated air and of utilizing the force of the compressed air to inducea current of air at ordinary atmospheric pressure into the furnace, I provide a secondary air-conduit, which, as already stated, terminates in a nozzle c, receiving the compressed-air nozzle b5. In the construction shown in Figs. l, 2, 3, and 4 the secondary conduit comprises a tube c', surrounding the smoke-pipe of the locomotive and adapted to receive air through perforations or other suitableopeningsinside thetube, a jacket or casing c2, partly surrounding the smoke-arch of the locomotive, and suitably attached to the boiler or its casing, and pipes c3 c3, extending from said jacket at opposite sides of the boiler to the nozzles c, there being as many of the latter as there are compressed-air nozzles b5. The tube c', jacket c2, pipes c3, and nozzles c constitute a conduit which receives air around the smoke-stack and conducts it downwardly along the heated surface of the smoke-stack, over the heated surface of the smoke-arch, and along the sides of the boiler, so that each nozzle c delivers a supply of heated air to the space surrounding the delivering ends ofthe compressed-air'nozzles h5. The jets of compressed air delivered by the nozzles b5 induce a rapid ow of air from the said secondary conduit, so that each nozzle c delivers to the ire-boxalarge volume of air, which results from a commingling of the compressed air furnished by the compressed-air conduit and the air furnished by the secondary conduit, the entire volume being highly heated.

It will be seen that in the construction above described the air is heated without materially drawing on the resources of the tirebox, the air in the secondary conduit being heated entirely by the waste heat from the fire-box, While the air in the compressed-air conduit may be heated either by Waste heat or by a comparatively small portion of the direct heat from the tire-box diverted into the casings b3. When the casings b3 and the ue b4, connecting the same with the interior of lire-box, are employed, I prefer .to connect each casing b3 with one or more of the nozzles cby means of one or more short tubes d, Fig. 3, said connections causing an upward draft quantities of the heated gases and products of combustion from the tire-box through the iiues b4 into the casings b3 to insure the heating of the air in the portions of the compressed-air conduits in said casings, it being understood that the products of combustion that enter the casings b3 will pass through the connections d to the nozzles @and back into the firebox.

In Figs. 6 and 7 IshoWa stationary tire-box a', arranged in suitable relation to a stationary boiler e. In this case the compressed air is supplied by a compressor b, which is connected by a pipe b9 with one or more nozzles b5, arranged to deliver compressed air to the fire-box, said nozzles entering the front wall of the tire-box. The compressed-air conduit b9 passes through the boiler-casing, so that it is subjected to the heat from the tire-box and from the boiler, the compressed air being to the atmosphere at 010 outside-of the casing` of the boiler, and passes through the said y casing and along through the flue or passage,

through which the heat passes through the l fire-box to the chimney, and preferably over the fire-box, as shown in Fig. 6, said pipe ter- .1 minating in one or more nozzles or outlets cl2, j arranged to deliver air at the delivering ends of the compressed-airnozzles b5. The conduit ci is preferably provided with two or more return-bends, as shown at cl3, in order to give said conduit a greater area of surface exposed to the heat.

It will be seen that in this embodiment of my invention there is no diiference in principle from that previously described, the action being essentially the same in both forms.

In Fig. 6 I have shown in the bridge-wall a5 at the rear of the fire-box a chamber a, which receives heated compressed air through a branch pipe 0,7, connected with the cornpressed-air conduit, the compressed air entering the chamber 0.6 being delivered to the tire-box through orifices a8 in the bridge-Wall.

I claiml. The combination, with a furnace or firebox, of an air-compressor, a conduit connecting said compressor with the interior of the tire-box, and asecondary air-conduit arranged to conduct external air to the delivering end of the compressed-air conduit, said secondary conduit being arranged to subject the air passing through it to heat, as set forth.

2. The combination, With a furnace or rebox, of an air-compressor, a conduit connecting said compressor with the interior of the ire-box and arranged to subject the air pass- IOO ITO

1o passing through them, and an air-compressor connected with the conduit communicating Withthe inner nozzle, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 9th day of 15 March, A. D. 1892.

WESLEY SMITH. lVitnesses:

C. F. BROWN, M. W. JACKSON.