US1393003A - Drying apparatus - Google Patents

Description

DRYING APPARATUS.

E. B. AYRES AND H. BOGATY.

APPLICATION FILED 050.1, 191s.

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E. B. AYHES AND H. BOGATY.

DRYNG APPARATUS.

APPLICATION FILED DEC. I, 1919.

1,333,003. 4 Patented 0.11. 11, 1921.

4 SHEETS-SHEET 2.

E. B. AYRES AND H.l BOGATY.

DRYING APPARATUS.

APPLICATION FILED DEC. Il 1919.

Patented Oct. 1.1, 1921.

4 SHEETS-SHEET 3.

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QRYING APPARATUS.

APPLICATION FILED DEC. I, 1919.

Patented Oct. 11, 1921.

4 SHEETS-SHEET 4.

UNITED STATES PATENT oFFlcE.

ELWOOD IB. AYRES AND HERMANN BOGATY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO THE PHILADELPHIA TEXTILE MACHINERY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA DRYING APPARATUS.

Specification Voi Letters Patent.

Patented Oct. 11, 1921.

Application tiled December 1, 1912. Serial No. 341,664.

l To all whom t may concern.'

Be it known that we, ELWooIi B. AYREs and HERMANN BOGATY, a citizen of the United States and a citizen of Russia, respectively, (the said Bogaty having declared his intentions of becoming a citizen of the United States,) and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Drying Apparatus, of which the following is a specification. y

Our invention relates to certain improvements in driers of the type in which the material is carried through a drying chamber and the air is circulated through the drying chamber and through a heating chamber by means of fans, or other devices, so that the material passing through the drying chamber will be properly dried.v

One object of our invention is to provide a conveyer of the above type that will carry powdered, or other, material, and, in some cases, liquid, which is to be dried.

Another object of the invention is to provide a pan conveyer and to design the pans so that their edges will overlap in order that a continuous stream of material will flow into the pans without spilling.

A further object of the invention is to provide a conveyer so that the material is carried by both runs of an endless chain.

A still further object of the invention is to provide means for'discharging the ma-l terial from one run to the run next below and to reduce, separate, or crush certain materials as they pass from one run to the other.

The invention also relates to certain details, which will be fully described hereinafter, reference being-had to the accompanying drawings in which:

Figure 1 is a longitudinal sectional View illustrating our improved `drying apparatus;

Fig. 2 is a transverse sectional view on the line 2 2, Fig. 1;

Fig. 3 is an enlarged view, showing the conveyers and the reducing rolls;

Figs. 4, 5 and 6 are views illustrating detais of one of the pans and the hangers; an

Fig. 7 is a view illustrating amodification in which a single conveyer is used.

Referring to Figs. 1, 2 and 3 of thedrawings, 1 is the casing inclosing a drying 5 are located in the partitions between the heating chambers and the drying chambers so as to circulate the air transversely through the heating chambers.

While' we have shown a given type of drying apparatus, it will be understood that the invention may be used in different types of apparatus having various methods of circulating air and heating the air in circulation.

6, 6a are two sets of endless chains. The chains 6 are adapted to pass around sprocket wheels 7 on a driven shaft 8 and around a sprocket Wheel 9 at the opposite end of the drier. The chain 6a is adapted to pass around sprocketvwheels 7a on a driven shaft 8a at one end of the drier and at the opposite end around a sprocket wheel 9. The chains carrypans 10, which are pivotally suspended from the chains, as clearly shown in Fig. 3. Each pan 10 is attached lto a hanger 11 at each side pivoted at 12 to the chains and the hanger at one side has an arm 13 extending above the run of the chain and has a projection 14 below the pan,-as shown in Figs. 4 and 5. The distance between the centers of the pivots ofthe pans is such that when the pans are on the horizontal run, the lip of one pan overlaps and preferably interlocks with the lip of another pan, so that the material, either powder or liquid, discharged into the pans from a continuous flowing chute, will not be spilled, as one after anotherof the pans passes the chute.

It will be noticed that the pivots 12 for each pan are not attached directly to the chains, but to an arm 16 securely bolted to o ne of the links 17 of the chain beyond the pivot point, Fig. 6, so that, in passing around curves, as at the left of Fig. 3, the pan is raised in order that its rear lip will disengage the forward lip of the succeeding pan, and, having completed this movement, its forward lip will rest upon the lip of the preceding pan. When the pans pass around the sprocket wheel 7, in the direction of the arrow, the arms 16 will lower the pan 10 so as to disengage its lip from the lip of the succeeding pan and will carry it onto the upper run with its lip under the lip of the preceding pan so that at all points, except where they pass around the sprocket wheels, one pan overlaps another.

In this drier, it is desirable that the material be discharged from each run of each conveyer and to provide reducing, or crushing, rolls between which the material passes. We provide a hopper 18 directly below the upper run of the conveyer 6. This hopper is located above a pair of reducing rolls 19, and the material after passing between these rolls is Adischarged directly into the pans 10 on the lower run of the conveyer. In order ,to discharge the pans on the upper run, we provide cams 20, which are located in the path of the projections 14, so that when a pan strikes this cam it is tilted, as shown in Fig. 3, and its contents discharged into the hopper 18. When the pan passes the cams it gradually assumes its horizontal position, being empty, and is not filled until it passes under the reducing rolls 19.

When the material is discharged into-the pan from the hopper it has been thoroughly mixed and reduced and will be carried by the pans onto the lower run of the conveyer 6 until it reaches a discharge point, where a cam 21 is located in the path of the upper projecting arms 13 of the pan and the contents of the pan will be discharged into another hopper 18b under which arereducing rolls 19a. rlhe material passes between these rolls into the ans on the lower run 6a of the conveyer, an the above operation is repeated.

The lowest rolls 19h, in the present instance, are the crushing rolls, but it will be understood that the type of roll may be modilied, depending upon the material being dried.

In Fig. 1, we have shown two endless belt conveyers, but it will be understood that a single conveyer may be used, as shown in Fig. 7, or more than two belts may be used,

if desired, and the material may be discharged directly from the lower run of the lower conveyer into a hopper, or may pass through lnal crushing rolls, as illustrated in Fig. 1, land into a hopper 22, which may discharge the material into any suitable conveyer, or receptacle. 4

In the` present lnstance, we have shown a feeding hopper 24 having an inclinedchute 25, which deposits material onto the upper run of the conveyer 6. ln this hopper is a feed wheel 26, which can be driven at any speed desired so s to increase or diminish the amount'of material discharged from the spout onto the conveyer.

It will be seen by the above construction that we are enabled to carry material through a drying chamber by means of pans and to .discharge the material from the pans from an upper run to the lower run of the same conveyer, o r from the lower run of one conveyer to the upper run of another conveyer so that both runs of the conveyer carry material. This material is subjected to the dryving action of currents of heated air passing transversely through the drying chamber. The crushing rolls, or reducing rolls, may be located under one or more, or all of the hoppers, if found desirable-j. Where `material is being dried that does not require reducing, when the hopper may be so shaped as to direct the material from the pans of the upper run to the pans of the lower run the amount of material passing .to the drier.`

One or more discharge devices may be used where the materiall has a tendency to cake or form lumps and reducing rolls may also be used to break up the cakes and lumps, if found desirable.

We claim: l

1. The combination in a drying apparatus, of a drying chamber; an endless chain conveyer therein; pans pivoted to the conveyer and hung below the chain, each pan having a lip at each end shaped so that the lip of one pan will interlock with the lip of an adjoining pan; means at each end for discharging the pans; means for releasing the lip of one pan from that of an adjoining pan; and means for feeding'material to the pans.

2. The combination in a drier, of a drying chamber; conveyers extending throughout the length of the drying chamber; frames pivotally connected to the conveyers; pans 'carried by the frames, each pan having a lip at each end so that when the pans are traveling in a horizontal plane the 'lip of one pan will overlap that of another pan; means for discharging the pans at each run of the conveyer; hoppers for receiving the material and guiding the material from an upper run toa lower run; and means for feeding material to the pans.-

3. The combination in a drying apparatus,

of a drying chamber; means for circulating tween the upper and lower runs of a conveyer, the hoppers at the end being located between the conveyers, said hoppers being arranged to receive material from one conveyer and tb direct it onto the pans of a run directly below it.

4. The combination in a drier, of a drying chamber; a conveyer having a series of pivoted pans arranged to travel in a series of runs, one directly below another; reducers between the several runs, one reducer being at one end of the drier and the other at the opposite end thereof, thepanson one run of the conveyer traveling in one direction and the'pans on the other run traveling in the opposite direction so that material carried by an upper run will be discharged through a reducer onto a lower run and will be carried by the said lower run to the opposite end of the machine where it will be discharged through another reducer onto a run directly below it, traveling in the opposite direction.

ELwooD' B.A AYRES. HERMANN BoGATY.

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