US850750A - Cement-kiln. - Google Patents

Description

Nol 850,750.

l W. H}HARDING.

CEMENT KILN.

APPLICATION FILED TBB. 1. 1907.

PATENTED APR. 16, 1907.

` lsv/Gefen 55 .in the bottom of the pit, so Ias to convey ma UNITED sTATEs PATENT' OFFICE..

WILLIAM PI. PIARDING, on PHILADELPHIA, PENNSYLVANIA.

CEMENT-Kim.

Specieaton of Letters Patent. I

' Patented April 1e, 1907.

Applicatie; tied Pantry 1, 1907. serai No. 355.223.

To all whom it vmay concerne.-

Be it known that LWILLIAM HARDING, a citizen of the United. States`,`residing in Philadelphiffi,v Pennsylvania, have invented certain improvements in Cement-Kilns, et

i which the following is a specification whichl there is a rotating .cylindricalshelL arear end ofthe kiln structure illustrating my My invention relates to certain improvements in cement-kilns of therotarytype in driving ofi a certain portion oi' the carbonio-' These'- objects, Ik ,attain in the following- '.manner, reference being Vhad to the accomlpanying drawings, in Whiche a c s A 4 5 Figure l 1s a vertical sectional vleW of the invention ;r and Fig. 2 is a section on the line 2 2, fFig. 1.-

A is the rear eand-of'a'rotary kiln, supported l onrollers a in the usual manner.

B is the rear hood or combustion-chamber, fand Bis the stack.

D is the` bin for the-cement material. l

shown as a screw conveyer, 'theblades of which are arranged ri ht and left, so as to feed in both directions rom a centralpoint.

E is a series of tubes which extend from the conveyer D into' thecombusti ori-chamber, preferably' to a point belowv the -openingo of the rotary kiln A. These tubesare preferablvprowided with valves e to lregulate the I flow of material therethrough.

lt will be noticed in referring to thedraw ings that there is a considerable s ace between the lower edge of thefrotary ki n A and the bottom of the rear hood or combustioncliamber, sothata large quantit -of material can be stored within this space; ut it will beA understood that this space may be increased by making' a pit under the combustion-chamber to any depth desired. 'I' referably make the bottom of the pit thus ormed inclined, as at 1r, and place a screwi; conveyer F a .certain degree.

terial in I an eveny stream therefrom. The shaft' f of. this screw conveyer is geared to any suitable driving mechanism.

At the rear of the combustion-'chamber vB is an endless-chain bucket elevator G, having pockets g, the chain passing around Wheels g 'lheconveyer F feeds the materialinto kthe boot g2 of this elevator, and thebuckets ltake up the material and discharge it onto an inclined chute ortube i, which extends through the combustion-chamber B intoy the feedend of the rotarykiln A. The material maybe `fed by gravity through this tube, as shown in the drawings, or a screw conveyor maybe used to positively feed the material through said tube, depending altogether upon the in clin'ationof the tube. K j

While l `haveshown three vertical tubes E extending from the bin to the it in the bottom of the combustion-cham er, it will be understood that one orvmore `tubes may be usedand that' other means may be provided. vfor feeding the material to the tubes thanA that shown in the drawings and that otherv forms 'of 4elevators may be used without de# parting from the essential feature of the invention. The operation is as follows: rlhe material is fed to the bin D and 1from the bin is con! veyedto one ormore of the tubes E, and as these tubes are subjected to the direct action l of the rcducts of combustion as they pass fromt e end of the rotary kiln'they become I vhighly heated', and consequently the mate- D is a conveyor, 'iny the present instance,-

rial passing'through the tubes is heated to mulates in the bottom of the combustionlchamber B it is heated to a furtherdegree Vby the action of the waste roducts of combustion playing inthe com ustion-chamber. Consequently a certain proportion ofthe carbonic-acid gas is driven 0S the cement mate- As the material accu-- rial before it enters therotary kiln. lThis for its introduction into the rotary kiln, .and

also a certain proportion of the carbonc-acid gas is drivenoff beto .e the material enters the rotary kiln y l 1'.- The combination of a kiln, a combusf tion-chamber-,atthe re'ar of the kiln havingy a space below the'mouth of the'kiln and dut? of the path of theiproducts of combustion, means for -supplying'material to the space,

\and means for removing Ithe material from and out of the path of the products of combustion, means for supplying material to the space across the path of the products of combustion, and means tfor removingthe material from the storagefspace and introducing it into the kiln, substantially as described.

8. The combination of a kilnfa combus-l tion-chamber at the rear of the kiln having a storage-space below the mouth of the kiln! and out ofthe path of the products of combu'stion,`one or more tubesextending through f 'the lupper portion 'of the .combustion-charn- `ber in thelpath. of the prpducts of combustion, means for feeding material throu h the tubes, said tubes discharging materia linto the storage-spacein the combustion-chamber, and means for removing material from thestoragepace and introducing it into the.

'i .'kiln, substantially as described.

4. The combination of a kiln, a combustion-chamber at the rear of the kiln, a storage-s ace -in, the..combustion-chamber below ti mouth. of the kiln, a stack communicatin'g with' the combustion-chamber at one side of the longitudinal'v line ofthe kiln, one

or more tubes in the Vupper portion of thel com'biistion-ch'amber extending across the path of. the V trom the ki n to thestack, said tubes-discllliarping material into the storage-.spaceinl t e ower portion of the combustiorrchamp v ben-land means for'zr'ernoving vmaterial from the `storage-'space and deliveringit lto the kiln, substantially as described;v

' 5. The combination of a rotaryflkrin, a combustionfchamber at the rear of the kiln andhaving a stor'a e-space below the mouth ofthe kiln out o 'the path of the prod ucts of combustion, a stack communicating .with the' combustion-chamber,A .a bin,l a ,screw conveyer, a tube leading -from thel ,'screw conveyer'mto the combustion-chamber and across the path of the products of combustion, a screw conveyer in the bottom of. the storage-space in the combustion-'chamber, av bucket elevator into which the lastmentionefil"vl screw conveyer feeds material,

and atube leading from the upper end of the elevator into the rotary kiln, substantially as described;

6. The combination of a rotary kiln, -a combustion-chamber at the-rear of the said kiln having a storage-space below the mouth of the rotary kiln and out'of the path of the products of combustion, a bini-for the material, a series of tubes leading frolmlthe bin into the combustion-chamber to a point 'behr low the opening in the rotary kilnsothat the tubesare` heated by the products of'fco'msV of the storage-space and delivering' -it intothe mouth of the rotaryv kiln,'substant ially n asdcscribed.

In testimony whereof I have :signed my name to this'specication in the presencev of two subscribin lproducts of combustion passing 5 witnesses.

Witnesses '.1 i

' VERA THALEG,

GEO. A. CHRIST.

' bustionl in theirpassagetoathe stack, 'a'ccn-y i veyer for removing material fromV the bottom 7o'-

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