US317935A

US317935A - Smoke-preventing furnace

Info

Publication number: US317935A
Authority: US
Publication date: 1885-05-12
Anticipated expiration: 1902-05-12

Description

2 Sheets-Sheet 1 (N0 Modgal.)

G. FARR & A. B. SEWARD. SMOKE PREVENTING FURNACE.

No. 317,935. Patented May 12, 1885.

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G. FARR 8a A. B. SEWARD.

SMOKE PREVENTING FURNACE.

Patented May 12, 1885.

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' UNITED STATES PATENT Orricn GEORGE FARR AND ALBERT B. SEiVARD, OF CINCINNATI, OHIO; SAID SEWARD ASSIGNOR TO EDlVAR-D \V. FARR, OF PEORTA, ILLINOIS.

SMOKE-PREVENTING FURNACE.

SPECIFICATION forming part of Letters Patent No. 317,935, dated May 12, 1:885.

' Application filed November-13, ISRQ. (No model.)

T0 aZZ whom it may concern:

Be itknown that WB,GEORGE Finn and AI.- BERT B. SEWARD, both of Cincinnati, Hamilton county, and State of Ohio, have invented certain new and useful Improvements in Smoke-Preventing Furnaces, of whichthe following is a specification,

Our invention is applicable to boiler and other stationary furnaces, or to locomotives; and its object is to prevent the formation of smoke by consuming the smoke-forming gases before they escape from the fire-chamber. Referring to the drawings forming part of this specification, Figure l is a plan view of the fire-chamber, showing the preferred form of our invention to be employed in connection with a stationary-boiler furnace,the boiler and upper part of the walls being removed. Fig. 2 is a vertical transverse section through the fire-chamber shown in Fig. 1 at the dotted line :0 of the latter figure, the boiler and walls being present. Fig. 3 is a plan view of a furnace, showing a modification of our invention as illustrated by 1. Fig. 4 is a transverse Vertical section of the furnace shown in Fig. 3, and taken at the dotted lines 3/ of the latter figure. Fig. 5 represents the application of our invention to a locomotive. Fig. 6 is an enlarged detail view of one portion of our in vention.

A A are the side walls of the furnace, A the fire-chamber, A the ash-pit, and A the boiler.

The fire-chamber is provided with the ordinary grate-bars, a, which may be of any desired form.

In each of the side walls A, and somewhat above the grate-bars, is a flue, B,extendin g nearly the entire length of the fire-chamber. A flue, B,preferably vertical,communicates with this flue B and opens into the ash-pit, as shown, and a short flue or opening, B", establishes communication between this flue B and the outside air. Heated air from the ash-pit and cold air from the outside are thus mingled in the flue B before entering the flue B. When preferred, air may be introduced from the ash-pit or the outside separately, as desired.

Several openings, b, establish communication between the flue B and the fire-chamber at either side, the number of these openings varying with the length of the fire-chamber, in the present instance four of these openings being shown at either side ofthe fire-chamber.

These openings are preferably staggered, u

as shownthat is, the openings at one side of the chamber are opposite the space between the openings at the opposite side.

, In the fines B, opposite each one of the openingsb,is placed a metallic box or conduit, 0, (preferably of cast iron,)the ends of which are open toallow air to freely circulate in the flue B. In the side of each one of these boxes which is toward the opening I) is a conduit connecting the interior of the box 0 with the opening I), and this conduit is preferably constructed as follows: One end of a short tube, B, is connected to the box 0 near the center of the latter, and opens into the cavity of said box. The other end of this tube extends part way through the opening Z toward the fireehamber.

At one side of the fines B, and preferably parallel thereto, are the pipes E, preferably located in the side walls, as shown in Figs. 1 and 2, and communicating in any desired manner with the steam-space of the boiler. These pipes E are provided ,opposite each ofthe boxes 0, with jets or nipples a, each of which passes through the outer side of the box G, the end extending aslight distanceinto the end of the tube D, which is within the box 0, as shown in Fig. 6, a space being left between the outer side of the end of the nipple and of the inner surface of the tube, to permit air to pass through the tubes D from the boxes 0. The ends of these jets e discharge, preferably, in the same horizontal plane, so that the steam which passes through each jet will be carried across the fire-chamber in a plane above and parallel to the plane of the grate-bars.

The manner in which our invention as above described operates is as follows: Fire having tubes D it causes a draft of air through the 100 fiues B, B and B, and through the boxes 0 and tubes D, and thus the air is mingled with the steam coming from the jets a just before entering the firechamber. This combined steam and air is driven across the furnace, the jets from the one side of the furnace alternating in position with the jets from the opposite side, forming a complete sheet of steam and air above the fire-line, and the gas arising from the burning fuel is caught by this sheet of steam and air and driven toward the sides of the chamber, in which positions it is consumed before the smoke is fairly formed, the combustion taking place uniformly throughout the entire length of the fire-chamber.

The tendency of the smoke-consumers heretofore employed has been to concentrate the heat at a certain limited point, and to compel all the smoke to pass over this point, causing it to be here consumed. The objection to this is that too great heat is applied to the boiler at a limited point, and the boiler is thus very quickly burned out at this point.

The sheet of air and steam formed by 1h jets e of our invention compel an almost uniform distribution of the heated area throughout the entire chamber, said area being in a plane above and parallel to the fire-line, the point of the greatest heat, however, being at the sides of the chamber, and when the furnace is aboiler-furnace at the point of greatest dis tance between the grate-bars and the boiler, so that the heat is thus uniformly distributed to the boiler throughout the entire extent of the fire-chamber, thus not endangering the boiler.

When our invention is applied to a furnace at the time it islbuilt, the pipes E are preferably placed in the walls, as shown in Figs 1 and 2; but when applied to a furnace after it has been built these pipes may be placed outside of the walls, as shown in Figs. 3 and 4., I

the boxes 0 being placed in the fines B within the Walls, as in the former instance. in either event the operation of our invention will be precisely the same.

If desired, the boxes 0 may be omitted, or rather modified in form, a plate, 0', being placed in front of that end of the openings Z) which adjoins flue B, in which plate the short tubes D are secured, as in the sides of the boxes, the other features of the invention remaining the same.

When applying our invention to locomotive-boiler furnaces, the arrangementshown in Fig. 5 will be substantially observed. In this instance both the pipes E and the boxes G are placed outside the walls of the furnace, the boxes being supported by appropriate brackets or angle-irons, as cl, secured to the outside shell of the locomotive. A pipe or tube, F, passes through the water-leg G of the locomotive, which tube serves the purpose of the openings 1), and into the outer end of this tube the ends of the short tubes D are illserted, as shown.

The principle and operation of our invention, whether used in connection with stationary or locomotive-boiler furnaces, is, as will be observed, precisely the same.

One end of each of the pipes E is provided with a cock, f, to enable the pipes to be blown out or cleaned.

\Vhen desired, the jets, flues, and pipes may be confined to one side of the furnace; but this mode of arrangement is not desirable, as the tion with smoke-prevcnting devices to which.

they may be applicable.

Having thus described our invention, what we claim as new, and desire to secure by'Letters Patent, is as follows:

1. The tlues B, located at the sides of the openings 1), communicating with the firechamber, in combination with the tubes D, extending into the openings b, and the supportingplate O, and the steam-pipes E, having jets 0 extending into the ends of tubes D, substantiall y as and for the purposes specified.

2. The fines B, located at the sides of the fire-chamber and having inlet-flues B B and openings 1), communicating with the fire'chamher, in combination with the boxes 0, located in the fines B, and provided with the tubes D, extending into the openings 1), and the steampipes E, having jets 0 extending into the ends of the tubes D, substantially as and for the purposes specified.

GEORGE FARR. ALBERT B. SEWARD.

Attest:

E. R. HILL, A. S. LUDLow.

0 fire-chamber and having inlet-flues B B and