US789611A - Smoke-consuming furnace. - Google Patents

Description

PATENTBD MAY 9, 1905.

W. L. JACKSON.

SMOKE GONSUMING FURNACE.

APPLICATION FILED FEB. 10. 1906.

2 SHEETSSHBET 1.

m. m M 0 w mm atliomq No.789,611. PATENTED MAY9, 1905 W. L. JACKSON.

SMOKE OONSUMING FURNACE.

APPLICATION FILED FEB. 10. 1905.

2 SHEETS-SHEET 2.

ITE TA'TES Patented May 9, 1905.

PATENT OFFICE.

SMOKE-GONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent NO. 789,611, dated May 9, 1905.

Application filed February 10, 1905. Serial No. 245,107.

To all whmn it may concern.-

Be it known that I, WILLIAM LEAF J ACK- soN, a citizen of the United States, residing at Brookland, in the District of Columbia, have invented new and useful Improvements in Smoke-Consuming Furnaces, of which the following is a specification.

This invention relates to steam-boiler and similar furnaces, and has for its principal object to provide a construction of furnace in which practically all of the fuel is consumed and waste and annoyance from the escape of smoke prevented.

A further object of the invention is to provide a novel form of smoke-consumer which may be applied to existing furnaces at a minimum expense and which may be readily rcnewed or repaired when damaged.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in the novel construction and arrangement of parts hereinafter described, illustrated in the accompanyingdrawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, and minor details (if the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a longitudinal sectional elevation of a smokeconsuming furnace constructed in accordance with the invention. Fig. 2 is a transverse sectional view of the same on the line 2 2. of Fig. 1, and Fig. 3 is a detail view of the smokeconsuming or gas-forming arch detached.

Similar letters of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The drawings illustrate an ordinary horizontal return-flue tubular boiler A, set in brickwork B in the usual manner. C is the fire-box, located at the front end of the boiler. D is the front bridge-wall. E is the combustion-chamber, located beneath the boiler and back of the bridge-wall and extending upwardly to embrace the boiler at its major diameter. F is the vertical return-passage establishing communication between the combustion chamber E and the rear ends of the return-Hues at, extending longltudinally through the boiler, and G is the smoke-stack at the front of the boiler, com municating with the front ends of the boiler return-fines. These several parts thus far referred to are or may be of the construction usual in return-flue steam-boiler furnaces.

At a point above the grate H, and preferably intermediate its length, is arranged a perforated arch I, there being one or more arches, in accordance with the length of the grate. Each arch is formed of a suitable refractory material, preferably of blocks or bricks of lire-clay, the blocks being of a size to permit convenient handling and of such shape as to form a self-supporting arch. The blocks are provided with any desired number of passages J of a shape and size depending on the size of the furnace and the quality of the fuel.

The bottom of the arch is arranged but a short distance from the grate-surface and preferably comes into contact with the mass of fuel on the grate, so that free draft under the arch is interfered with. Above the arch is a transverse wall K to prevent the passage of the products of combustion over the top of the arch.

In operation the mass of fuel in front of the arch I will become more or less coked and will yield up a large proportion of smoke and heavy carbonaceous gas, which will not be entirely consumed in front of the arch, but is compelled to pass through the openings J. The arch being exposed to the direct action of the heat will become incandescent to a greater or less extent, and the gases in passing through the openings J will be very highly heated and will be thoroughly consumed when brought into contact with the mass of burning fuel at the rear of the arch. The heat is found suflicient to convert practically all of the products of combustion into fixed gases, and in practice it is found that no unconsumed carbon issues from the stack (Jr. As the fuel is consumed it is pushed back under the arch from time to time and fresh fuel is'added in front of the arch.

In many cases a single arch proves insufficient, and asecond or third arch may be added, as required.

It is obvious that by forming the arches of blocks of convenient size repairs may be readily made, and it is further obvious that the device may be built into existing furnaces of any type, including flue, tubular, and locomotive boilers, at comparative small expense.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a smoke-consuming furnace including a grate, a perforated arch arranged above and intermediate the ends of the grate, dividing the combustion-chamber into two separate spaces, each of which may receive air through the grate to support combustion of the fuel, the bottom of the arch being sufficiently near the grate to make contact with a normal supply of fuel.

2. In a smoke-consuming furnace, a grate,

an imperforate wall dividing the combustionchamber into front and rear combustionspaces, each of which is arranged to contain a supply of fuel, and to receive air through the grate for supporting combustion, the lower portion of said wall forming an arch that is provided with perforations for the passage of the gaseous products of combustion, whereby such products are retained in the lower portion of the combustion-chamber and emerge directly over the mass of fuel in the rear combustion-space.

In testimony whereof I aflix my signature in presence of two subscribing Witnesses.

W'ILLIAM LEAF JACKSON. lVitnesses:

JAs. H. BLAOKWOOD, ALBERT POPKINS.

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