US510589A

US510589A - Furnace plant

Info

Publication number: US510589A
Authority: US
Publication date: 1893-12-12
Anticipated expiration: 1910-12-12

Description

(No Model.)

.13.001151 111111111105 PLANT.

No. 510,589. Patented Dec. 12, 1893.

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' UNITED STATES PATENT OFFICE.

vEOKLEY B. COXE, OF DRIFTON, PENNSYLVANIA.

FU RNACE- PLANT.

SPECIFICATION vforming part of Letters Patent No. 510,589, dated December 12, 1893.

Application filed November 2,1898. Serial No.489i'738- (N0 mdeL) To all whom it may concern.-

Beit known that I, ECKLEY B. COXE, a citizen of the United States, residing at Drifton, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Furnace Plants, of which the following is a specification.

This invention relates to that class of fur- The furnace to which my present improvements are herein shown applied is the furnace described and claimed in Letters Patent of the United States No. 499,716, granted to me June 20, 1893.

-In the drawings accompanying and forming a part of this specification, Figure 1 isa front elevation (as seen from the right-hand in Fig. 3), of a furnace-plant embodying my present invention.

ing shown in section for more fully illustrating the nature of the invention. Fig. 3 is a sectional side elevation of the furnace, andcorresponds substantially with Fig. 1 of the drawings of my aforesaid Letters Patent; a further illustration of the preferred construction of the furnace is also shown in Fig. 2 of said patent.

Similar characters designate like parts in all the figures.

My improved furnace-plant consists of a traveling-grate furnace, means for supplying fuel to the furnace, a blowing-machine connected with the furnace for supplying air thereto, driving-apparatus for actuating the traveling grate and a mechanism-actuator connecting the grate-driving apparatus and the blowing-machine for corresponding working movements, whereby the traveling grate and the blowing-machine will have proportionate velocities, and a change in the velocity Fig. 2 is a planview of a' portion of the furnace-plant, the furnace beof one of these be accompanied by a proportionate change in the velocity of the other.

The furnace is shown in Figs. 1 and 3 set underneath a steam-boiler, B, which may be replaced by any other thing to be heated; or, the furnace may have an ordinary tire-brick roof, and the heated gases be conducted away in a flue, to be used at some distant point. In the present instance, the furnace is designated in a general way by F, the'blowing-machine by L, the furnace-grate-driving apparatus by D, and the motor, or mechanismactuator, by M.

- The furnace in the preferred form thereof herein shown, comprises the usual side-walls, front-Wall and rear-wall, as more fully set forth in the aforesaid Letters Patent, and is provided with a traveling grate, designated in a general way by G, said grate being carried by chain-wheels, 12 and 14, that are supported on shafts, 13 and 15, respectively, journaled in bearings on the walls of the furnace. The traveling grate is or may be 'supported along the lower run thereof by guide-ways, as 19; the upper run thereof being, in the present instance, supportedby the' upper side of the air-chamber J. This chamber is shown divided into' the separate air-blast chambers, a, b, c, d, to which air is supplied from the blowing-machine L from the main conduit N through the separate conduits a, b, c', d. These distributing-conduits are shown provided with air-valves, or regulating-valves, a, b, c, d, whereby to independently regulate the pressure ofthe air-blast in the said chambers d, b, c, d, respectively, as described and claimed in my aforesaid prior Letters Patent.

The driving apparatus for actuating the traveling grate comprises the described shafts and chain-Wheels, and some suitable means for applying power thereto, as, for instance, the worm-wheel 40, fixed on the outer end of the shaft 15, and the driving-shaft 42 carried in bearings on the framework and having a Worm, 41, meshing With said worm-Wheel, this shaft being provided with a pulley, '44, or other device whereby power may be applied thereto.

The blowing-machine L preferably consists,

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as indicated. in the drawings, of an ordinary fan blower, which may be of the class known in the market as a pressure blower, or, in some cases, a piston blower maybe substituted for the fan blower.

The mechanism-actuator M may consist, as indicated in the drawings, of a steam-engine, the one herein represented being shown of the so-called Westinghouse type, and comprising a framework,20, two cylinders, 2l and 22, and a valve-chest, 23, to which steam is supplied from the boiler B, through the pipe 24, in which is shown a valve, 25, for admitting steam to the motor M and for regulating the speed thereof. The shaft 26 of the motor M extends to the blowing machine L for driving the same, and is shown provided, on the opposite end thereof, with the driving-pulley, 27, which is shown directly connected by a belt, 28, with the aforesaid driving-wheel 44 on the shaft 42 of the grate-driving apparatus D. By this means or other well-known means similar thereto, the blowing-machine is directly and positively connected with the driving apparatus of the endless grate, so that proportionate working movements will be imparted thereto; and said connection is such that if the speed of one be varied, the speed of the other will be proportionately varied. This variation may be effected, in the form of the furnace-plant herein shown, by opening or closing the ordinary stop-valve in the steam-pipe 24, so as to vary the speed of the mechanism-motor M.

By varying the speed of the motor, or mechanism-actuator M, the working movement of the blowing-machine L will be changed; and also the working movement of the traveling grate will be correspondingly changed, and the pressure of the air-blast in each of the series of chambers, a, b, c, d, will be changed in varying ratios, depending upon the relative pressures therein. Usually,in operating this class of furnaces, the highest pressure will be used in the chamber b, a somewhat lower pressure in the chamber c, and a much lower pressure in the chamber d, while the pressure in the chamber c, under that portion of the grate where the fuel is ignited, will usually be between the pressures in the chambers h and c. By reason of the organization described, the air-pressures in the successive chambers will be changed in different ratios, the lower pressures being varied by a dierent amount, proportionately, on the reduction or increase of the speed of the blowing-machine and traveling grate. This peculiar effect, or result, is one of the objects of my invention, since a different grate-speed and consequent difference in the rate of combustion of the fuel, properly requires such a variation as here set forth in the ratios of the airblasts.

The fuel is or may be supplied to the traveling grat-e from a supply-hopper, H, set at the forward end of the furnace and delivering the fuel through an inclined passage-way,

5, onto the upper run of the traveling grate at the extreme forward end of the furnacechamber C, as indicated in Fig. 3 and more fully described in the said prior Patent No. 499,716, to which reference may be had for further description of such minor features of the furnace as are convenient to the operation of the same.

The steam-engine or other actuator M being set running, power is transmitted therefrom to and through the driving-apparatus D, to the grate-mechanism of the furnace, to move the upper run of the grate toward the left-hand in Fig. 3. During this time the fuel from the hopper H runs downward onto the grate, forming a layer, 6, which being burned as it passes through the furnacechamber C, the cinder is finally delivered from the rearward end of the traveling grate (at the left-hand in Figs. 2 and 3), as more fully described in the aforesaid Letters Patent. At the same time the motor M actuates the blowing-machine L, to supply air, through the conduits and air-chambers, to the upper run of the traveling grate which constitutes the furnace-floor; the supply of air to the several chambers ct, h, c, d, (when a series of these are used,) being regulated by the air-valves in the several distributingpipes described. Upon any change of speed of the motor M, the velocities of the blowingmachine and of the traveling-grate, these two mechanisms being directly connected for proportional movements, are correspondingly changed, so as to supply to the furnace proportionate amounts of fuel and air for effecting the proper combustion of the fuel whether the rate of combustion of the same be greater or less, within ordinary requirements. i

Having thus described my invention, I claim- IOO 1. In a furnace-plant of the class specified,

the combination with a traveling-grate furnace having an air-blast apparatus and having driving apparatus for actuating the grate, of a blowing-machine connected with the airsupply apparatus, a mechanism-actuator connected with and actuating both the blowingmachine and the said driving-apparatus,and means for regulating and varying the speed of the mechanism-actuator, whereby proportionate working movements are imparted to the blowing-machine and the traveling grate, substantially as described.

2. In a furn ace-plant, the combination with a traveling grate furnace having an air-supply apparatus consisting of successive airblast chambers, of driving apparatus for actuating the traveling grate of the furnace, a blowing-machine connected with and supplying the several. air-blast chambers, means for independently regulating the air-pressure in said chambers, respectively, and a mechanism-actuator connected with and actuating both the plowing-machine and the grate-driving apparatus,substantially as described and for the purpose specified.

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grate-driving apparatus, and means for regulating the admission of steam to the engine for varying the speed of the same, substantially as described and for the purpose specified.

ECKLEY B. COXE.

Witnesses:

STEWART F. MAGFARLANE, ELLIOTT A. OBERRENDER.