US958970A - Fuel-feeding means for cement-kilns. - Google Patents

Description

Patented May 24, 1910.

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A. NEU.

APPLICATION FILED APR. 22, 1908.

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A. NEU. l FUEL FEEDING MEANS' FOR CEMENT KILNS. y APPLICATION FILED APR. 22, 1908. 958,970, Patented may 24, 1910.

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@9i/thaw@ i UNITED STATES PATENT OFFICE.

.DOLF NEU',` 0F. TOD ILET, BRITISH COLUMBIA, CANADA.

-FUEL-FEBDING MEANS FOR CEMENT-KILNS.

Bpecioation of Letters Patent.

Patented May 24, 1910.

Application led April 22,1008. Serial No. 428,527.

rTo all whom it may concern:

'Be it known that I, Anonr NEU, a subject of the King of Great Britain, residing at- Tod Inlet, British Columbia, Dominion of Canada, have invented `a new and useful Fuel-Feedin which the fo lowing is a specication.

In cement kilns now in neral use, it is the ordinary custom to emp oy -a fuel conduit having an'open discharge end and to blow through the sameb means ofa cold air blast, powdered coal or ot er fuel'. With this system there is a considerable loss of fuel, for a comparatively eat amount of the same, blown with great orce, is necessary in order to secure suliicient heat, and. as a result considerabiecon is blown directly through the kan and into the stack' so that the smoke carries a large percentage of carbon. f Y One o the 'primary objectsl f the present invention is to provide a novel system b which .more perfect combustion-is secure thus effecting a material saving in fuel and also permittlng the employment of a` lower ade, said system moreover being less wearvmg upon the'lining of the kiln at the hot zone, thereb eliminating oft-repeated re-v newals and t e consequent necessity of shutting down the kilns. y

A further and important object is to provide fuel feeding means that will permit the employment of lar er kilns than are now in use and to provi e means bywhich the amount and character of the feed can be varied as desired in order to secure the highest .The preferred embodiment of the inven-l tion is illustrated in the accompanying drawwhere1n:--

in igure 1 is a sectional View through the discharge end of akiln, showing the novel feeding system partially in elevation and partially in section. Fig. 2 is a View in elevation of avportion of-the inner face of the kiln head showing the feeding means in end elevation. Fig. 3 is a detall longitudinal sectional view on an enlarged scale through a portion of the upper conduit andy the hot air distributing means. Fig. 4 is a detail sectional view through the coupling for the rotary-pipe.

Similar reference numerals designate corresponding parts in all the lign-res of the drawings.

In the embodiment disclosed, the-kilnI-eo'm- Means for Cement-Kilns, of

prises a rotatable cylindrical 'body 5 having a non-rotatable head 6, beneath which is located the usual clinker receiving pit 7. A fuel conduit 8 extends through the head 6 into thebody, and has an open discharge end. This conduit is prefeably constructed ofmetal or material that is not readily affected by heat. A hopper or reservoir 9 for the fuel located above the conduit, has a discharge spout 10 communicating with said conduit, the material being fed to the spout by a suitable screw 1l or by any other means appropriate for the purpose. 4

v Located below the fuel conduit 8 is another fuel conduit 12 that extends through the head 6, and has its discharge end located in the body contiguous to the lower side thereof. This conduit or atleast the discharge'end thereof is substantially elliptical in cross section, as illustrated in Fig. 2. Fuel is fed to the conduit 12`through a spout 13, to which said fuel ,is delivered b a screw 14, the screws 11 and 14 being driven from any suitable source, as for instance, a drive shaft 15 connected by belts 16 and pulleys 17 to said screws. 'A fan 18 is connected to the conduits 8 and 12 for delivering air thereto. Another fan 19 has an intake 20 communieating with the clinker pit, said fan having an outlet or discharge 21. -A hot air supply pipe 22 having a controlling valve 23 therein, leads from the discharge 21, and has a series of branches 24 that are coiled about the discharge portion of the conduit 8, said pipes terminating at the discharge end of the conduit and 1n angular relation thereto. Another hot air supply pipe 25, leading from the discharge 21, has a valve 26 therein, and said pipe extends to a coupling 27 located within the conduit. A rotatable pipe 28, disposed centrally and longitudinally within the conduit 8, has one end Ajournaled in the coupling, its other end prospider or transverse supporting bar 31. The

rotation of the pipe 28 and nozzle 29 is secured by means of a shaft 32 that extends through the coupling 27, and has its end branched,v as shown at 33 in Fig 4, and secured to the pipe 28. This shaft extends longitudinally through the conduit and propulle 36 on the driveshaft 15. Another air supp y pipe 37 is connected with the d1s' charge 21 of the fan 19, and hasa controlling valve 38 therein. This pipe is associate with the conduit 12, and a plurality of outwardly into this branches 39, leadin from said pipe, are carried about the sai conduit and have thelr dischar e portions 40 located longitudinally p of the ischarge end of the conduit 12, and

on different si es of the same.

With this structure, heavy blasts of air are not necessary in the conduits 8 and 12, but it will be`evident that'as with the ordinary construction, coal delivered into conduitsthrough the s outs 10 and 13` will be driven by said air blsts to the discharge ends of the conduits.v :The tem rature in the clinker pit 7 is ver high, an consequently hot air will be rawn from the clinker pit by the fan 19 and willv be delivered into t e pipes22, 25 and 37. The branches 24 ofthe pipe 22 will cause gyratory currents of air to be delivered around the discharge end ofthe conduit 8 and rearwardly into the -kiln or furnace, while ,the nipples 30 of the nozzle 29 will diretcurrents of air ratory body of hot air. Consequently tiza' powdered c oal or other fuel delivered by the conduit 8 will be forced .outwardly by the currents of air from the nipples 30 and whirled into the furnace,.

this hot air insuring quick combustion. The particular character of the discharge from the conduit 8 can be readily controlled b varyin the force of-the jets of air, throug 1 the me ium of the valves 23 and 26, and'by adjusting the nozzle 29 longitudinally into and out of the discharge end of said conduit, the latter being permitted by the natural resiliency of the pipe 25 and by means of the slot 41 formed in the condu1t`8 through which theA pipe 25 passes, this slot being covered by a suitable-plate The lower conduit constitutes ai, supplemental feeding means delivering a comparatively broad stream of fuel over the lower portion of the furnace or kiln, andinsuring the proper fusing of the material.

The central fuel-feedingl device is so designed and o erated that the fuel is discharged to follow a gyratory course longi, tudinally through the kiln and in'proximlty to the inner surface thereof,l while the lower fuel discharging device is so designed and.

arranged that a comparatively broad belt of fuel is discharged close to the surface of the material treated in the kiln, and furthermore,

Such flat belt intercepts the gyratory stream discharged by the central device so that an effective commingling of the two streams or belts takes place close to the material in the ing from the the said kiln where the maximum heat is required.

ously in this manner, but it may be desirable, in some instances, to use the upper feeding device without feeding fuel through the lower devicei From the foregoing, it is thought that the construction, operation, and many advantagesof the herein described invention will be-apparent to those skilled in the art, without further description, and it will be understood that varlous changes in the size, shape, proportion and minor details of construction, maybe resorted to without departspiritor sacrificing any of the advantages of the invention.

Havin thus fully described my invention, what I cim as new, and desire to secure by Letters Patent, is

' 1. The combination with a furnace, of a fuel conduit having its dischar e end projecting thereinto, an air supp y pipe eX- tending longitudinally through the conduit and projectlng be ond the discharge end thereof, said pi e having a closed rear end and having a p urality of laterally extendingv hollow air dischargin members on its projectin portion to brea up the column of fuel ischarged from the conduit and also deliver air 1nto the fuel, and means for rotating the ipe 2. The com ination with a furnace, of a fuel conduit leading thereinto, and an' air supply pipe extending within the conduit and havlng a nozzle at the discharge end of said conduit, said nozzle being provided with a plurality of lateral discharge nipples.

3. The combination with a furnace, of a fuel conduit delivering thereinto,' an air supply pipe extending longitudinally within the condult, and having a discharge end disand provided with lateral discharge ports, means for rotating said pipe, and outstand-` ing members on the ipe and rotating there-` with in the path ofthe fuel issuing from the conduit to deflect the fuel.

4. The combination with` a furnace, of a fuel conduit delivering thereinto, anv air supply ipe extending longitudinally .within the con ult, a rearwardly flared nozzle carried b the discharge end of said pipe and locate at the discharge end of the conduit, said nozzle having a plurality of outstanding discharge nipples, and a shaft yextending` into the. conduit andfor rotating the same.

5. The combination with a` furnace, of a fuel vconduit Acommunicating therewith, a plurality of a1r su the end of the con uit`and causin gyratory currents of air longitudinally o said conduit, and an air supplly pipe extending lon-y gitudinally within t e conduit and ha an outwardly flared nozzle at its rear end,

ply pipes discharging atl The two feeding devices operate simultaneposed at the 'discharge end of sald conduit A Vnected to said yfan-and having branches 'wrapped about and supported on the dis- 95eme 6. The combination with a furnace, of a fuel conduit delivering longitudinally there- .into, a fan having a discharge, an air su pply pipe connected to the discharge and having a plurality of branches wrapped about the conduit and having their discharge ends located at the discharge end of said conduit,

another air supply pipe located longitudinally within the conduit, a nozzle carried by v the end of the second air supply pipe and having a plurality of outwar ly` extending discharge nipples, and means for effecting the rotation of the second air supply pipe and the nozzle.

7. The combination with a furnace, of a fuel conduit delivering thereinto, means for creating gyratory currents of hot air around the discharge end of the conduit and within the furnace, and means for delivering jets of hot airlaterally of the conduit at the discharge end thereof to drive the fuel delivered by said conduit outwardly into said gyratory currents.

8. The combination with ay kiln, of a.

clinker-recei'ving pit located below the same,

a fuel conduit delivering into the kiln, a fan having an intake communicating with the clinker pit, and discharge pipes leading from the fan, certain of said ipes creating yratory currents of air wit in the kiln at t e dischar e -end of the conduit, and another of sai pipes producing jets of air laterally of the discharge end of the con- L duit to drive the fuel from said conduit outwardly into the gyratory currents.

9. Thevcombination with a furnace, of a fuel conduit delivering thereinto a fan having a discharge spout colinected to the conduit for-directing a current of air through said conduit, means for supplying fuel to the conduit between its discharge end and` its point of connection with the spout of the fan, another fan, a discharge pipe concharge end of the conduit for delivering jets of air to spread the fuel, a continuously rotat'ing device at the discharge end of the conduit to assist in the spreading of the fuel after it leaves the latter, and operatingmeans for the rotary device.

10.. The combination of a furnace, of a feeding device located centrally thereof at one vend and constructed to deliver av combustible mixture into the furnacein a gyrator stream longitudinally of theA furnace, an a second feeding device for discharging a combustible mixture lon itudinally into the furnace in a relatively intercepting the gyratory stream discharged by the first-mentioned feeding device to cause `a commingling of the 'streams'directly lllector on the shaft and located beyon at stream close. to the surface of the material thereinand over the surface` of the material in theV furnace.

11. The combination with a furnace, separate fuel-discharging devices a mechanism for supplying fluid through the devices for mingling with and carrying the fuel therethrough, air-delivering means arranged within one of the devices, an air-discharging means arranged outside and associated with each device, a common source of air connected with all the said means to mix air with the lfuel after leaving the devices, and

a controlling valve for each means.

v12. The combination with a kiln, separate fuel-feeding devices arranged in one end of the kiln and disposed one above the other,

the upper feeding device consisting oflmeans' for directing fuel and air longitudinally of the kiln in a gyratory stream, and the lower feeding device consisting of means for de livering a relatively broad flat stream of fuel and air longitudinally of the kiln in close proximity to the material therein and intcrcepting the stream deliveredl by the first device at a point in close proximity to such material.

13. The combination of a rotary kiln, a pair of stationary fuel-feeding devices arranged in the same end of the 'kiln and located respectively in line with the axis of the kiln and between such axis and the bottom, the axially arranged device comprising means for discharging fuel outwardly from the axis and in a gyiatory stream, and the other device consisting of means for discharging fuel in a straight stream in a path to interceptI the said yratory stream at a point below the axis cfg the kiln. v

14. Tliecombination with a furnace, .of a fuel-discharging conduit .communicating therewith, a hollow conical detlector arranged yin line with the conduit and ta ering toward the latter for spreading the nel, means for adjusting the deector axially of the conduit, continuously operating means for rotating the -deilectonand a plurality of members arranged on the conical face of the deflector and inclined away from the conduit with respect to the axis of the deilector.

15. The combination withy a furnace, of a fuel-discharging conduit communicating therewith, a' rotary hollow shaft dispose longitudinally of the conduit, a flarin dlgt e discharge endof the conduit, means for adjusting the shaft longitudinally to vary the 1 position of ,the deflector, means for connecting the shaft with a source of air under pressure, and a plurality of outstanding members on the conduit and havin apertures for discharging air outwardly into the lfuel delivered by the conduit.

16. The combination witha rotatable kiln body, of a head therefor, a clinker-receivng pit located below the body, an upper fuel conduit delivering to the-body through the head, a lower conduit in its discharge end l substantially elliptical `i-n cross section, means for feedin fuelI to the conduits, a fan having a disc arge connected to the conduits, another fan having an intake communicating with the clinker-receivin pit, a plurality of discharge pipes leading om the second fan, certain of said discharge pipes having branches coiled about the conduits and having discharge ,ends disposed at the discharge ends of said conduits, a rotatable pipe located longitudinally within the upper conduit and havin a rearwardly enlar d nozzle at the -disciarge end, said nozz e being 15 provided with a plurallt of outstanding discharge nipples, and a s aft connected to the pipe for rotating the same.

In testimony, that I claim the for ing as my own, I have hereto affixed my slgna- 2o ture inthe presence of two witnesses.

ADOLF NEU.

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