US712251A - Limekiln. - Google Patents

Description

'Nog 7|2,25|. Patented oct. 2a, |902.

l A. P. BROU'MELL.

LIM EKILN.- (Application med may 2s, 19o2.\ (No Model.) Z'Sheets-Sheet I.

/N VEA/Tof? A .Proom eZ Z NrTnD STATES .PATENT OFFICE.Y

ALBERT P. BROOMELL, OF YORK, PENNSYLVANIA.

LIMEKILN.

SPECIFICATION forming part of Letters Patent No. 712,251, dated October 28, 1902.

Application tiled May 28,1902. Serial No. 109,303. (No model.)

To all whom it may concern:

Be it known that l, ALBERT P. BRooMELL, residing at York, in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in .Limekilns, of which the following is a specification.

This invention relates to improvements in that class of kilns used for roasting lime-rock in the manufacture of lime, cement, and the like, and it primarily seeks to provide a kiln of the character described especially designed for burningr lime by producer-gas in a convenient, economical, and effective manner; and in its generic nature my invention comprehends a novel construction of kiln, including a steel shell, having a base portion for firmly resting on the ground and having a special bottom construction for supporting the upper portions ofthe kiln, including its brick and the rock in thecourse of burning.

My invention also includes a special construction of shears or discharging doors, which constitute the-bottom of the cooler, a means for operating the same, and a novel construction of gas-feeding and burner devices, including damper-controlled hot-airfeeding means, and mechanism for conveniently removing rock or other accumulations in the burners to prevent the lime or other material from choking theair-inlets to the burners. Y

In its more subordinate features my invention consists in certain novell details of construction and peculiar Acombination of parts, all of which will hereinafter be fully described, and specifically pointed out in the appended claims, reference being had to the accompanying drawings, in whichu Figure 1 is a vertical longitudinal section of my improved kiln, taken practically on the line 1 1 of Fig. 2. Fig. 2 is a horizontal section of the same on the line 2 2 of Fig. 1. Fig. 3 is an end elevation of the same. Fig. 4 is a transversesection of the upper end thereof, taken on the line 4 4 of Fig. 1.

In the practical construction of my invention the main or body portion is'built of steel, the platform being also of metal. The body portion includes a shell 1, the outer part 1iL of which extends above the platform 2 in a cylindrical or other desired shape in cross-section, and the said shell incases the burningstack or rock-holder, having the usual tirebrick lining 32 and the surrounding masonry body 3b. The entire masonry structure of my kiln is supported upon the platform-section 2, mounted upon vertical posts 4or stiffeningribs 2a, bolted on the inside to the bottom part of the shell 1, which, as will be readily seen from the drawings, forms an air-space surrounding the bottom or cooler end of the kiln portion proper, and the said posts 2iL 2 at their upper ends have steel gussets or angle-braces 2b, upon which rests the heavy cast-metal plate 2C, that supports the brick and masonry work and upon which the steel cooler or conical bot-tom 4 of the kiln-body is fixedly suspended. The cooler 4, which consists of an inverted cone shaped bottom, riveted or otherwise pendently secured to the plate 2", has its discharge controlled by a novel construction of shears or dischargingdoors, the peculiar arrangement of which forms a feature of, my invention. Two opposing doors of shear plates 5 l 5 are provided, and each door is independently supported upon a pair of hanger-rods 5 5a in such manner that the said doors can be swung outward from under thel discharge end of the cooler 4, and to provide fora close joint the said doors are curved in an arc with the fulcrum of the han-ger-rodsas the center, and the bottom edge of thecoolercone is ysuitably shaped to provide for Athe close-fitting thereagainst of the two independently-swingable doors, and for conveniently manipulating the said doors at Will to open or close the discharge end of the cooler partially or whollyT each door has rack portions 5" 5b for coperating with the pinions 5c 5c on the hand-Wheelequipped actuating-rods 51 5, as clearly shown in the drawings.

By providing a closure means for the cooler operatable in the manner described an easilyworking, convenient, and positive actuating means is produced for controlling the cooler.

In the practical constructionmykiln may be equipped with one or more furnaces. In the drawings I have shown two oppositelydisposed furnaces, which communicate with the cated by F) are of a slim arched shape and constructed of special fire-brick, especially at lthe sides,v center, and top of the iiues f, and

stack or kiln body. These furnaces (indi-y IOO the brick or masonry work is suitably braced by the truss or cross rods f', that connect with the segmental shell-plates f2, as best shown in Figs. 3 and 4.

The furnaces (see Fig. l) are supported on the laterally extended platform sections, which include the metal platesp p, mounted on I-beams p p', riveted at their inner ends to the posts 2 and supported at their outer ends on the vertical I-beamsp2p2, and the ue j' of each furnace includes a vertical portion f3, that extends in a plane below the fuel or feed openingf4 to form a pocketf5, the reason for which will presently appear. Each furnace is also provided with an air-inlet f6 in the nature of a channel built in the brickwork, that communicates with the flue part f3 and with an opening 2d in the cast-metal plate that supports the main or central brick structure and which opening 2d communicates with the air-space in the lower end of the shell-pocket that surrounds the cooler. Each air-opening 2d is controlled by adamper 2O to regulate the amount of air admitted into the furnace, and to provide for conveniently operating the said dampers each damper has a chain or cable 2Oa connected therewith reaching to the platform in front of the furnace.

By having the inlet communicating with the air-space surrounding the cooler it is manifest that hot air is taken from around the cooling-cone and delivered hot into the combustion-chamber, and hence the chilling action of ordinaryatmosphere is avoided,an d, furthermore, by reason of its contact with the hot brick as it passes to the combustionchamber the air is superheated.

When burning lime there is always more or less rock that falls through the furnaceflues into the ring-chamber, which can be removed from time to time as it accumulates. In my invention I provide a special means capable of being easily manipulated and adapted to positively provide for the removal of the accumulations. For this purpose the pockets f5 are provided. In the bottom of each of said pockets is a brick partition f7, having inclined sides, (see Fig. 4,) and these partitions extend directly across the bottom of the fines. The partitions f7 also extend up about flush with the bottom of the air-inlets ofthe said flue. The purpose of the center partitions is to deflect the lime or rock that falls back into the iiues to the bottom of the pocket f7 onto the doors g g under said pockets, which are held to slide in the guides g g', secured to the under side of the platform portions that support the furnaces, and are operatable in any well-known manner, whereby each time the lime is drawn from the coolercone the said slides g can be opened to permit any lime accumulations in the pocket to also drop into the receiving-car or floor below. Each furnace is also provided with two peep-holes h h, through which the operation of the re can be noticed and through which the lime-burner7 can watch the rock as it 'maaar passes down in front of the fines. These peep-holes can also be utilized for permitting of the insertion of a bar into the flues and the limestone or in case the lime becomes bridged or choked.

Each furnace has a gas-inlet 30 disposed at the opposite side from the air-inlet, and the said inlets have their discharging-mouth 80L flared laterally in order that the flame may be distributed all over the combustionchamber and into the fines. With each inlet is connected a gas-supply pipe which com municates with the gas-main, in practice connected with a producer or other means of supply, and while I have not shown it in the drawings it is manifest that one or more kilns may be operated from a central gassupply. The amount of gas delivered into each furnace is regulated by a damper 30X in the gas-pipe, as shown.

From the foregoing, taken in connection with the accompanying drawings,itis thought that the manner in which my kiln operates and the manner of its construction will be readily understood by those skilled in the art to which it appertains.

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

l. In a kiln of the character stated, a stack, a cooler, pendently joined with the lower end thereof, a metallic shell surrounding the stack and the cooler and extending to the ground, a furnace connected with the stack by a flue, said line extending through the shell, substantially as shown and for the purposes described.

2. In a kiln of the character stated, a stack, a cooler pendently joined with the lower end thereof,a metallic shell surrounding the stack and the cooler and extending to the ground, and forming a supporting member for the stack and furnaces, a furnace connected with the stack by a iiue, and an air-inlet opening into the flue and communicating with the space between the shell and the cooler, as set forth.

3. In a kiln of the character stated, astack, a cooler pendently joined with the lower end thereof,a metallic shell surrounding the cooler and extending to the floor or ground, aseries of furnaces radiating from the stack, each furnace having a flue communicating with the stack at a point above the cooler, and an air-inlet which opens into the space between the shell and the upper end of the cooler, and a separate valve for each inlet for controlling that end of the inlet that opens into the shellspace, as specified.

lOO

IIO

L1. In a kiln of the character described, a l

metallic supporting-platform, astack mounted thereon, a cooler pendently supported on the platform,said cooler forming the discharge end of the stack, a metallic shell surrounding the cooler and forming a central support forV the platform, and a series of furnaces mounted upon the platform, said furnaces each in cluding a iiue discharging into the stack at a point above the cooler, as set forth.

5. In a kiln of the character stated, a supporting-platform, a stack mounted thereon, a furnace projected radially from the stack,and supported upon the platform, said furnace including a ue discharging into the stack, a valve-controlled air-inlet, and a fuel-feed discharging into the furnace-Hue, said furnaceflue having a pocket in a plane below the air and the fuel inlets, and a slidable bottom for the said pockets, substantially as shown and described.

6. In a kiln of the character stated,the combination with the stack; of a furnace projected radially from the stack, said furnace including a flue discharging into the stack, said iiue having a pendent portion, the lower end of which forms a pocket, a slidable bottom for the pocket, a bridge portion projected centrall'y upward from the bottom of the pocket, a valved air-inlet, and a fuel-inlet,- the said air and fuel inlets having their discharges at a point above the bridge in the pocket, for the purposes described.

7. An improvement for the purposes stated, comprising a metallic supporting base, including a platform, a stack centrally supported upon the platform, a metallic shell surrounding the stack, said shell including a portion extended below the platform to the ground, a cooler pendently supported from the central platform, said-cooler formingthe bottom of the stack and held within the lower metallic shell portion, a series of furnaces livadiating from the stack supported uporI the platform, each furnace including a flue-'discharging into the stack, and having a pendent portion discharging through the platform', a gate for controlling the platform discharge to the flue, a valve-controlled air-inlet communicating with the space between the cooler and the metallic shell, and discharging into the flue, a fuel-supply for each furnace including a feed-pipe arranged to discharge into the flue at a point above the air-inlet for the said iiue, substantially as shown.

8. In a kiln of the character described, the combination with the conical cooler; of a pair of opposing closure members for the discharge end of the cooler, and forming the bottom thereof, means for supporting the said doors to swing outwardly to andfrom each other, each of the doors having a rack, said means including a pair oflpendent hangers for each door pivotally connected at their upper end to the cooler-body, and an operating-rod for each door having a pinion for engaging the rack, substantially as shown and described.

ALBERT P. BROOMELL.

Witnesses:

BERTHA H. GOODMAN, WILLIAM J. KUNTZ.

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