US608862A - Smoke-consuming furnace - Google Patents

Description

No. 608,862. Patented Aug. 9, 18:98.

, .1. IMHOF & s. SPRING.

SMOKE CONSUMING FURNACE.

(Application filed Jan. 22, 1898.)

(No Model.)

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JOHN IMIIOF AND SAMUEL SPRING, or ALLEGHENY, PENNSYLVANIA:

SMOKE CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 608,862, dated August 9, 1898. Application filed January 22,1898. Serial 1 667,650. (No model.)

To (LZZ whom it may concern.-

Be it known that we, JOHN IMHOF and SAMUEL SPRING, both of Allegheny, in the county'of Allegheny and State of Pennsyl- Vania, have invented a new and Improved Smoke-Consuming Furnace, of which the following is a full, clear, and exact description.

Our invention relates to smoke-consuming furnaces and it consists of certain novel features, which will be hereinafterdescribed and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal elevation of a boiler, in part, and a sectional elevation of a furnace equipped with our smoke-consuming devices, substantially on the line 1 l in Fig. 2. Fig. 2 is a cross-sectional elevation taken substantially on the line'2 2 in Fig. 1. Fig. 3 is a transverse sectional view substantially on the line 3 3 in Fig. 1, and Fig. 4: is a detached side view of a detail of construction.

Our invention is adapted to be used in connection with any form of furnace; but as its use will be mainly confined to furnaces under steam-boilers it is so represented in the draw ings and is so described in the specification.

The boiler A may be mounted in a setting which in the main is of any ordinary construction. This provides a furnace-chamber H, having grates I adapted to receive the fuel. Immediately back'of the rear end of the grates is a bridge-wall E, which is composed of fire-brick set so that there is a space between adjacent bricks of each row. This bridge-wall is carried close to, but not quite in contact with, the boiler, leaving a narrow space 6 between said wall and the boiler. This construction divides the space through which the gases must. pass into a large number of comparatively small apertures, which are formed by the separation of the bricks forming the wall.

Back of the front wall is a second bridge wall F, generally located under the rear of the boiler and in any case a sufficient distance from the front wall to provide a combustion-chamber G between the two bridgewalls. The rearbridge-wallF is constructed substantially the same as the front wall. The

only difference in construction is that the lower layer of bricks is placed 011 edge and extends longitudinally of the boiler, thus forming spaces f of larger area than would otherwise be provided. Preferably the brick in this wall are more extended or placed farther apart, thus giving an increased area for the draft.

Through the front wall of the fire-box is projected a pipe 0, which is connected with any convenient source of steam-supply. This may be either'the boiler A or another boiler, as desired. The pipe 0 terminates just inside the front wall B of the furnace and is provided with a fan-shaped jet or discharge D. This jet D consists of a hollow metal nozzle which is flattened and is in general of a fan shape and is provided with a series of small orifices (I, located in its edge and extending in a direction which will produce a fan-shaped jet of steam. This nozzle D is located just beneath the boiler and so as to discharge its steam horizontally and to the rear, thus covering the burning fuel with a fan-shaped jet of steam. This has a tendency to protect that part of the boiler immediately over the grates from the intense heat of the coal and also. to cause the smoke which has been generated by the combustion of the fuel to eddy about the furnace, and thus to become thor oughly heated, so that complete combustion may take place. I

As the gases from the furnace have to pass through comparatively small openings in the bridge-wall E they will become thoroughly heated by contact with the material compos ing said wall, and thus combustion will be facilitated. Both of the bridge-walls will act upon the gases in this manner. The combustion-chamber G between the two bridgewalls will have a tendency to cause a thorough mixing of the gases which have not at that time been thoroughly burned.

This construction of furnace is very simple and costs but little to construct. The result of its use isa thorough combustion of the softest bituminous coal,and consequently prevents discharge of smoke.

Having thus described our invention, we claim as new and desire to secure by Letters Patent A boiler or similar furnace, having two ICO bridge-Walls located one just back of the grate, and the other near the rear of the boiler and forming between them a combustion-chamber, said bridge-Walls being formed of firebrick loosely piled so as to leave passages between successive bricks in a row, and extending upward almost into contact with the boiler, the openings in the forward bridgewall being of a uniform size and the passages through the rear bridge-Wall being of a larger area than those through the front bridge- Wall, and the lowercourse of bricks in the rear bridge-Wall being on edge and with their tom of the chamber are discharged most rap- 2o idly.

JOHN IMHOF. SAMUEL SPRING.

Witnesses:

A. B. ANGNEY, J. P, KUNKEL.

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