USRE3237E - Improved circular kiln - Google Patents

Description

BEST AVAlLABLE C F. E. HOFFMANN.

Circular Brick Kiln.

Reissued Dec. 22, 1868.

4 BEST AVAILABLE cbPY 5mm W wag-a m FRIEDRICH EDWARD HOFFMANN, OF BERLIN, PR

SSIA.

Letters Patent .Yo. 48,244, dated .1' one 13. 1865; reissue No. 3,237, dam! Dcccorzber 22, I868,

The Schoduh referred to in the Letters Patent and making part of the some.

To all whom it may concern Be it known that l, Fnrnnnrorr EDWARD Horr- Mass, of Berlin, in the Kingdom of Prussia, have invented a new and improved Kiln for Burning Bricks and other materials; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use ,the same, reference being had to the accompanying drawing, forming part of this specification, in which draw ill Figure 1 represents a vertical central section of this invention, the line z-z. fi 2. indicating the plane of section.

Figure 2 is a plan or top view of the same, partly in section.

Similar letters indicate corresponding parts.

This invention relates to a kiln or oven, which is provided with an endless or continuous channel or gallery, divided into a series of distinct sections, into which the material to be named is introduced.

The fuel used in the kiln is dropped'down through apertures in the top of the channel or gallery Each section communicates with a smoke-chamber, and through this chamber with a smoke'stack, suitable slides or movable partitions being provided, in such a manner that bricks or other materials introduced into the several sections of the kiln can be gradually heated andcooled, and the operation of the kiln can be continued for any length of time, with great economy in fuel.

A represents an endless or continuous channel or gallery, which. may be of a circular shape, as shown in the drawing, or of any other desired form, for instance, elliptic, square, &c.

This continuous channel or gallery is divided into twelve (more or less) sections, 1 to 12.

Each section is provided with a door, a, through which the bricks or other material to be burned or heated can be introduced and removal, and with a series olaportures, b, in the topof the c noel, through which fuel is introduced.

In order iocause said fuellto arrange itself properly on the bottom of each section, said bottoms are provided with cavities, c, situated opposite the openings in the top, as shown in fig. 1 of the drawing.

The several sections can be separated, one from the other, by a movable partition, B, which is introduced through suitable slots, d, and those slots which are not occupied by the partition are covered up by movable covers, 0.

Each section communicates, through a tine, 0, with a smoke-chamber, D, and the inner ends of said flues turn up and are covered with dampers, f, which can be raised or lowered by means of rods, f, extending above the upper surface of said smoke-chamber, or, instead of the dampers f, valves oiany other description may be applied, which will serve to open and close the lines 0.

Each of said flues can thus be readily opened and brought in communication with the srnoke-chzunber.

The smoke-chnrnlmr con'nnunicutes, through cxitlines Ir, with the smoke-stack E.

The operation of this kiln, when used for burning brick, is as follows:

Suppose the kiln to he in full action and the movable partition B placed between sections 12 and i; then the doors a, of sections 1 and 2, are open; the damper or valve of the line for section 12 is also open, while all other openings and valves of the kiln are closed. The sections 2, 3, 4, 5, and 6 contain material. (say bricks,) the burning of which has been finished. Section T contains the fire, and sections 8, 9, 10, i1, and 12 are tilled with bricks yet to be burned. Tire doors of sections 1 and 2 are opened to fill sectiou l with fresh bricks, and to empty section 2 of its contents already burned and cooled.

Through the doors a of sections 1 and 2, a current of atmospheric air enters into the burning-channel or gallery, and passes through the sections 3, 4, 5, and 6, where it is gradually heated. Meanwhile the bricks contained in these sections are gradually cooled.

In section 7, fuel of any kind, such as wood, coal, coal-dust, &c., is introduced through the openings, b, in the top of the gallery. The fuel drops into interstices between the bricks, and is instantly ignited by the contact with the hot atmospheric air.

The gaseous products of the combustion now pass through the sections 8, 9, 10, 11, and 12, gradually heating the bricks contained in these sections, until they leave the burning-channel or gallery through the flue emanating from section 12, whence they enter the smoke-chamber D, and finally escape through the-exiti'lues into the smoke-stack.

Afl'er the burning of the material in section 7 is finished, and section 1 is filled with green bricks, the door of section 1 is closed, the partition B is placed between sections 1 and 2, the valve of the line or section 12 s closed, and that oi'sectiou 1 is opened, and fuel is now introduced into section 8, and the operation is the same as before, and so on, from one section to the other.

The operation of the kiln can thus be continued with out interruption.

The air, which is introduced to support the combustion of the ms, is heated by passing through the material previously burned in the kiln, and serves, at the same time, to cool said material, so that no fuel is wasted, and no time is lost in cooling oil the kiln tor the purpose of emptying and recharging it.

This kiln can be made in any desirable form or shape, as the plan of the burning-channel or gallery may be circular, elliptic, square, the.

The kiln can be used with great mivnntnge-tbr burning bricks, tiles, limestone, pottery, chalk, gypsum, cument, and also for roasting ores, and for various metalln cal operations.

ving thus described my invention,

BEST AVAILABLE COPY What I claim as new, and desire to secure by Letters Patent, is-

1. The continuous kiln or gallery A, made in sections 1, 2, 3, &o., the several sections having separate communication with the main smoke-flue D, in comoination with the movable rtition B, fitted to 0 between adjoining sections, subfiifintlally as and or the purpose described.

2. The combination of the continuous galleryA,composed of successive chambers or sections 1, 2, 3, &c., the tines (land dampers f, the main flue D, the movable titign B, and the fuel-supply apertures b in the fb'poi Ea kiln,-subs=antially as described and shown.

3. The cavities or depressions c in the bottoms of the kiln-chambers or sections 1, 2, 3, 800., in combination with the fuel-supply apertures b, substantially as described.

This specification signed by me, this lltbday of February, 1868.

FRIEDRICH EDWARD HOFFMANN.

Witnesses:

H. Bnsrsmms, THEOD. Rso'rsn, O. E.,

7 K easel Strut, Berlin.

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