US133925A - Improvement in lime-kilns - Google Patents

Description

ZSheets--Sheet 1. C. B. GUREY.

V v Lime-kilns. No.133,925. Patented Dec.17,1872.

Fig. 3

VWr neaaes Inv-camion To all whom it may concern: Y Be it known that I, CHARLES B. CoEEY, of JCleveland, in the county of Cuyahoga -and State of Ohio, have invented a certain new fand Improved Lime-Kiln, of which the follow-` ng is a description Figures 1, 2, and 3, are side elevations of the I"lime-kiln. Fig. 4 isa view of the'inside ofthe shaft orcupola of the kiln. Fig. 5 is a plan 'ew ofthe base or lower section. Fig. 6 is a side view of the lower sect-ion. Fig. 7 is a detached section.

Like letters of reference refer to like parts n lthe several views.

The nature of this invention relates to a lime-kiln and the object of the same is'to cause unequal diffusion of heat through the. cupola, su` VVthat the lime orstone can be uniformly burned, and indevices for more readily removing the burned lime. .""In the drawing, A represents the cupola or shaft of the kiln, and B the base, in whichis the furnace and pit from which the lime is removed. In the lower part of the cupola, and immediately above the base, is a furnace, '0, Fig. 3, of which D is the ash-pit. Immediately under the grate are air-holes a for the admission of cold air to the grates when the Qdoor of..the ash-pit is closed. A furnace, corresponding to the above in construction, is in the opposite side of the cupola, and for a similar purpose. It will be observed, on examination of Fig. 7, that the roof of the above said 'furnaces is arching and rslants upward inwardly, as shown. Directly above the mouth fthe furnace are air-fines c penetrating the Yw ll of the cupola to the arch of the fire-place.

)d lues are also made to communicate with he ilues d, Fig. 4, opening into the flue or shaft H of the stack. Said iiues are indicated by the dotted lines e, Fig. 1. E, Figs. 2 and 5, the mouth of the large central furnace F, of j,which G, Fig. 5, are the grates, immediatelyr ,bencath which are air-holes b for the admission of cool air to the under side of the grate vwhen the furnace-door is closed, and also to furnish a small draft to the furnace. F are ues forthe admission of air to the central nrnace. Arranged lengthwise above the grates a deflection, H, an end view of which is 4shown in Fig. 6. The under sides H H' of STATES PATENT GEEIGE.

'.cHAELEsB. coEEY, 0E CLEVELAND, onto.

lMPROVEMENT lN LIME-KILNS.

I ASpecification forming part of Letters Patent No. 133,925, datedDecember 17, 1872,.

Fig. 6, and which is also supported on standards I arranged on each side of the grates. Vertically through the deflection are lines f. The purpose of said deflection Will presently be shown. J J, Fig. 6, are a pair of slidingr draws. Said draws are attached t0 one' arm of the lever K by means of a link, indicated by the dotted lines g, Fig. 5, and which also indicate the draws. Said draws are worked backward and forward by the levers, for a purpose presently shown.' Immediately below the draws are a pair of slides, L, Fig. 6. The relative position of the slides to the drawn out for opening the bottom of the kiln, the slides will close the opening, for a purpose hereinafter shown. M, Fig. 5, is a frame, in which are journaled rollers, over which is run a metallic endless apron, N. Said apron and rollers are operated by a crank, 0. I

Thus far having described the construction and general arrangement of the kiln, the practical operation of the same is as follows: In kilns, as ordinarily constructed, the stone is not evenly burned; hence results an unevenness in the'lime-some being wholly burned,

while some is but partially so, and, therefore,'of poorquality. 'This difference is due to the want of a uniformity in the heat ofthe kiln, it not being evenly diffused through the mass of stone with which it is charged, in consequence of a defective construction. To avoid this defect and cause a more eve nly diffused heat throughout the burning mass is the object of my invention, and this I accomplish, in part, by the dellector H, which, as above described, is raised above the fire and directly over it. In consequence of the curved undersurfaces of the deector, the heat, instead of passing directly upward through the stone, is deiiected sidewise into it, thereby causing `as much heat at the sides of the charge as there is above, the result of which is a more uniform burning of the charge, and, consequently, a more even and better quality of lime. Although much of the'heat is thrown to the sides of the furnace, yet it is not excluded from the charge immediately over the deflector, that part of the charge being supplied with a proportionate amount of heat by the flues f, through which the heat directly ascends into the cenl said deflection are concave, as shown in said tral portion of the charge, while a certain draws is such that, when the draws aref amount thereof is deected to the sides, as and for the purpose aforesaid. To aid in the reduction of the charge by increasing and sustaining the heat above the deflector the flues c, Fig. 3, are introduced for conducting air from the outside to the interior of the cupola, which, as it passes through the thick and heated walls thereof', becomes hot thereby, not only supplying additional heat to the charge, but also heated air to supportand cause a more complete combustion ofthe unconsumed gases which arise in the furnace and pass up through the charged cupola, thus utilizing the waste gases in generating of heat, while the fines b admit cool air to the grates, thereby preventing them from being rapidly burned out, as aibresaid. Theside furnaces C, referred to. in consequence of their arching and slanting construction, as above described, throw the heat in direction of and toward the arch or deflector H; thus the fire is directed from the furnace C toward the opposite side of the cupola, at or about the iiues el, whereas the corresponding furnace on the opposite side ot' the kiln throws its heat in the opposite direction, thus producing a cross-fire, thereby intensifying the heat and causing a rapid and complete burning ot' the charge, which settles down about the central furnace and lodges upon the draws J J', by which the lime is removed as follows: 0n pushing the handles or levers K, Fig. 5, to one side, as indicated by the dotted lines h, the drawsl are drawn out, (the slides L, immediately below them, rst having been pulled forward,) the lime will then fall through the bottom of the kiln upon the apron N, which, on being madeto revolve, carries the lime forward and out from the pit, from whence it falls into a wagon stationed under the Guter end of the revolving apron to receive it.A By this means much time and labor are saved in handling the lime, and, furthermore, it prevents it from being ,broken,up, which it is liable to be when much handled. The slides L, referred to, are for the purpose of shutting olf the cold air in the event that any stone or piece of lime should be caught between the end of the draws and the back of the kiln, against which they slide into place and preventing the draws from being closed tight. In such case the slides L are used to close the opening caused by such clogging up of the draws, thereby preventing cold air from passing up into the cupola. In this position the slides remain until the next discharge of lime, which would remove the obstruction along with the discharging lime.

Claims.

What I claim as my invention, and desire to secure by Letters Patent, isl l. The draws J J and levers K, arranged in

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