US1694708A - Rotary drier - Google Patents

Description

DH: Il, 1928.` n A 1,694,708 F. ASJONES 'RTARY DRIER Filed March 24. 1928 s sheets-snm 1 F. A. JONES ROTARY DRIER Filed March 24, 1928 3 Sheets-Sheet 2 gwnoc fa/mr IIA Dec. l1, 192.8.

y 1,694,708 F. A. JONES ROTARY DRIER Filed March 24, 1928 5 Sheets-Sheet 3 Patented Dec. 11, 1928.

1,694,708 PATENT oFFIcE.

FRED A. JONES, 0F CANTON, OHIO.

' ROTARY DRIER.

Application led March 24, 1928. Serial No. 264,548.

The invention relates to driers adapted for drying coal, slack or other material in a broken or finely divided state, and more particularly to al drier adapted to be -located around a tubular kiln whereby the waste heat radiated from the kiln. may be utilized in the drying of the material.

. The object of the improvement is to provide af drier surrounding a portion of an inclined rotary kiln, means being provided for charging material to be dried into the upper or higher end of the drier and for discharging the dried material from the lower' end thereof, the waste heat radiated from the kiln being utilized to dry said material.

The invention also contemplates sion oa/circulation of air through the drier to assist in the drying of the material and if desired, this air may be drawn from between the kiln and the drier in o'rder that the air may be heated before it enters the drier. i The above and `other objects may be at- `tained by providing a plurality of pockets surrounding a lportion of an inclinedrotary kiln and disposed longitudinally thereof,kv means being provided for charging materialto be dried into the higher end of each pocket and for dischargin the `dried material from the opposite end o each pocket, the pockets being flared toward their lower ends, 'if def sired, in order to assist in passing the mat-e- 'rial therethrough toward the discharge end;

means beingprovided for circulating air i through the pockets and, if desired, for drawing the air from between the kiln and pockets and passing the same into the pockets.

An embodiment of the invention is illustrated 4in the accompanying drawings, in which Figure 1 is a side elevation of the improved drier, showing a portion of an inclined rotary kiln around which the drier is mounted;

Fig. 2, a longitudinal sectionalview of the same;

Fig. 3, a transverse sectional view takenA on the line 3-3, Fig. 2; v

Fig. 4, a similar view on the line 4 4,

n Fig. 2;`

Fig. 5, a transverse sectional view through the drier and kiln, showing a modified form of charging mechanism taken substantially on the line 5 5, Fig. 6;

Fig. 6, a section on the line 6-6, Fig. 5;

Fig. 7, a fragmentary side elevation of a modified form of drier with parts broken away for the purpose of illustration;

the previ;

Fig. 8, a transverse section on the line 8--8, Fig. 7; and

Fig. 9, a similar View on the line 9-9, Fig. 7.

Similar numerals refer to similar parts throughout the drawings.

The inclined, cylindrical kiln shown generally at 1 may be constructed, supported and operated in any usual and well known manner. The improved 'drier to which the invention pertains is adapted to surround the kiln cylinder either near one end portion thereof as illustrated in Fig. 1 or at any other location upon the kiln.l

In the construction illustrated in Figs. 1 to 4 inclusive, the drier may be in the form of a hollow, cylindrical drum, comprising the outer and inner shells 2 and 3 respectively, the inner shell being preferably spaced from the kiln cylinder.

The drum may be divided into a plurality of longitudinal pockets 4 by means of the radial partition walls k5 located between the in-- ner and outer shells. lThese pockets may be closed at the upper or higher' end of the drum by the end plate provided with a plurality of openings 7, one of which Vcommunicates withl each longitudinal pocket. To aid material in traveling through the pockets, they may be provided with diverging side walls.

The outer shell 2 may be connected to the end` plate 6 as by the angular ring 8 and the inner shell may extend beyond the end of the outer shell and be connected to the lring plate 9 as by the angular ring 10.

Charging compartments 11, corresponding in number and location-to the longitudinal pockets 4, are provided between the ring 4plates 6 and 9, the rear and side walls 12 and of the drum and beneath a feed hopper 15 which may contain the coal or other material to be dried.

A funnel 16 may be supported above the receiving compartments of the drum and any i device such as the reciprocating pusher 17 maybe timed with the drum so that as each receiving compartment ispositioned beneath the funnel 16, a charge of material may be dropped thereon from the platform 14.

The opposite end ofthe inner shell 3 may be connected to a ring plate 18 as by the annular ring 19, said ring plate being supported upon the kiln cylinder vin any suitable and well known manner; The outer shell 2 terminates at a poin spaced from the end of the inner shell, thus forming an annular compartment into which all of the pockets 4 discharge, this an- 10 nular compartment being surroundedas by the hood 21 and being arranged to discharge into the chute 22 at the under side thereof.

A pipe 23 may be connected to the upper portion oi? the hood 21 for drawing air into thel receiving compartments 11 and through the pockets 4, the heated air with moisture from material dried being discharged from .the pipe to a pulverizer, burner or other equipment, or otherwise disposed of.

be charged into the drum in the manner shown in Figs. 5 and 6. With this construction, the overhead hopper and pusher may be dispensed with and a scoop .24 may be con- 25 nected to each receiving lcompartment 11 and adapted to pick up the coal lor other material to be dried from the trough 25 as the drier is rotated therethrough in the direction of the arrow shown on Fig. 5.

As shownin Figs. 7 8 and 9, the pockets 4 may be iare'd toward their discharge ends in order to facilitate the travel of the material to be driedlfrom the receiving compartment toward the discharge end of each pocket'.

'These pockets may be separate units, as

illustrated in these figures, instead of simply compartments within a drum as shown in the form of the invention above described, such spacing causing increased heating of the side pockets may be supported spaced from the kiln cylinder 1 in any suitable manner and provided with the receiving compartments 11*t similary to those above described.

may all communicate with an annular discharge chamber 26. For the purpose of asgsisting in drying the material passing fthrough the pockets, heatedair may be taken into the disc large ends of the pockets `from r a point between the cylinder and pockets as by the. pipes 27, this heated air passing through the pockets and out of the receiving compartments thereof, thus flowingcounter. to the material in the pockets, this air carrying olif the moisture. given ofi in the drying process.

In order to circulate this air through the Vpockets, a hood 21a may surround the receivmg compartments, a pipe 23a communicating therewith for withdrawing the heated, moislso' ture-laden air and conveying it to apulver. izer, burner or other equlpment, or otherwise disposing` of the air.

If desired, the materialto be 'dried may' wall area advantageous to drying. These VThe lower or large ends of these pocketscatewith the hood 21 for filling the receiving compartments withmaterialto-be dried. A plurality of discharge openings 28, corresponding 1n number and location to tthe pockets 4a, `are located around the periphery of the annular discharge chamber 26.- Each of these openings is normally closed by a door 29 hinged as at 30-,to the exterior of the annular chamber and provided with a spring 31 or the like for'normally holding the door in closed position. f

An angular arm 32 isr fixed to each of these doors and adapted to engage the upper edge 33 of the 'dischargechute 311 to automatically open each' door and discharge the material from the adjacent pocket, as the same reachesy a position above the discharge chute;

In operating the drier, it should be understood that the material passing through the kiln has no connection with the material being dried in the drier. For instance, raw cement-making material might be passing through thekiln while coal is being passed through the drier for drying.

The operation of the kiln is in no ways connected with the operation of the drier, the kiln simply being used as a means for rotating the drier pockets to pass the material therethrough, and the radiated heat from the kiln being utilized in` drying the material.

In the operation of the drier, as the same lis rotated by the rotation of the kiln, the

receiving compartment of each pocket is charged with a-substantially equal amount of material to bedried with each revolution of the device.

This' material is progressed by gravity to- ;ward the lower ends of the pocketsv as thesame revolve 'andair is passed through the pokets to further assistin drying the material, this air being, if desired, heated airl drawnfrom around the exterior of the kiln as shown in Fig. 7.

With each revolution of the drier, a portion of the material from each pocket is dis- '.v

charged into the common discharge compartment and from the same into `,the discharge chute. i

I claim: l 1.' In combination with an inclined rotary 115 kiln, longitudinal pockets surrounding the kiln, means for charging material to be dried into the upper ends of the 'pockets and for diss chargingthe materialfrom the lower ends of the pockets.

2. In combination with an inclined rotary kiln, longitudinal pockets surrounding the kiln, means for charging material to be dried into the upper ends-of the pockets and for discharging the material from the lower ends 125 of the pockets, vand means for circulating air through the pockets. f

3. In combination with an inclined rotary kiln, longitudinal pockets surrounding the L 65 A feed chute or hopper 1.6? may communikiln, means for charging material to be dried 136 into the upper ends ofthe pockets and for discharging the material from the lower ends the material.

et. In combination with an inclined rotary kiln, longitudinal pockets surrounding the kiln, means for charging material to be dried into thev upper ends of the pockets and :tor discharging the material from the Ilower ends of the pockets, and means for withdrawing heated air from around the kiln and passin'g it through the pockets. y -v -5. In combination with an inclined rotary kiln, longitudinal pockets surrounding the kiln, means for charging material to be dried into the upper ends of the pockets and for discharging the material from the lower ends of the pockets, and means for withdrawing heated air .from around the kiln and passing it through the pockets counter tothe flow of the material.. y

6. In4 combination with a rotary kiln,` downwardly inclined, longitudinal pockets surrounding the kiln, means for charging material to be dried into the upper ends of the pockets and for discharging the material from the lower ends of the pockets.

7. In combination with a rotary kiln, downwardly flared, longitudinal pockets surrounding the kiln, means for charging material to be dried into the upper ends of the pockets and Vfor discharging the material from the lower ends of the pockets. s

8. In combination with an inclined rotary kiln, longitudinal pockets surrounding and spaced from the kiln, means for charging material to be dried into the upper ends of the ypockets and for discharging the material from the lower ends of the pocketsr and means Jfor withdrawing heated air from between the kiln, andpockets and passing it through the pockets.

9. In combination with an inclined rotary kiln, longitudinal pockets surrounding and spaced 'from the kiln, means for charging material to be driedinto the upperends of the pockets and for discharging the material from the lower ends of the pockets and means for withdrawing heated air Jfrom between the kiln and pockets and passing it throughl the .pockets counter to the flow of the material.

10. In combination with a rotary kiln. longitudinal pockets surrounding the kiln, means for! charging equal amounts into one ing the material from. the opposite ends of end of each pocket upon each revolution of i the kiln, and means for discharging the material from the opposite end of each pocket.

11. In combination with a rotary kiln, lon# gitudinal pockets surrounding 'the kiln,

means for'charging equal amounts into one end'of each pocket upon each revolution of the kiln, means for discharging the material means for charging material into the receiving compartments and means for discharging the material from the opposite ends of the pockets.A

13. In combination with an inclined rotary kiln, longitudinal pockets surrounding the kiln, a receiving compartment at the upper end of each pocket inclined toward the pocket, means for charging material into the receiving compartments and means for dischargthe pockets.

14.-. In combination with an inclined rotary kiln, longitudinal pockets surrounding the kiln, a receiving compartment at the upper end of each pocket, a discharge compartment communicating with the lower ends of the pockets, and means for charging material into the receiving compartments, passing the material through the pockets, and discharging the material from the discharge compartment. a

15. In combination with an inclined rotary kiln, flared longitudinal pockets surrounding the kiln, means for charging material to be dried into the upper ends of the pockets and for discharging the material from the lower 100 ends of the pockets.

16. In combination with a rotary kiln, longitudinal pockets surrounding the kiln and provided with diverging side walls to aid material .in traveling through the pockets, 105

means for charging material to be dried into the upper ends of the pockets and for discharging the material from the lower ends of thel pockets.

In testimony that I claim the above, I have 110 hereunto subscribed my name.

v FRED A. JONES.

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