US1314994A

US1314994A - Planoghapii co

Info

Publication number: US1314994A
Authority: US
Publication date: 1919-09-02
Anticipated expiration: 1936-09-02

Description

A. WERTENBRUCH.

DRIER APPLICATION HLED lun/16.1917.

Patented Sept. 2, 1919.

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THE COLUMBIA PLANOGRAPH C0., WASHINGTON, n. c.

A. WERTENBRUCH.

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uiviTED sTATEs PATENT oEEioE.

ANTONY WERTENBRUGI-I, 0F DETROIT, MICHIGAN, TO THE LARROWE MILLING` COMPANY, OF COHOCTON, NEIN` YORK, `A CORPORATION OF NEW YORK.

DRIER.

` Specification of Letters Patent.

Application led July 16, 1917. `Serial No. `180,696.`

To all 'whom it may concern:

Be it known that I, ANTONY WERTEN minori, formerly a subject of the Emperor of Germany, having applied for U. S. citizenship papers, residing at Detroit, in the county of Wayne and State of Michigan,

have invented certain new and useful Improvements in Driers, of `which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to driers of that type comprising a revolving drum having its interior divided by partitions into small compartments through which the material to be dried is fed in contact with the hot gases and heated surfaces. It is the object of the present invention to obtain various advantages and in particular` to obtain a simple construction to manufacture, to facilitate assembly and repair and to obtain a more uniform and complete drying ofthe material. `With these objects in view the invention comprises the construction as hereinafter set forth.

In the drawings:

Figures l and la together show a side elevation partly in longitudinal section through the drier; Y

Fig. 2 is a cross section on lines 2-2 and 21-2 Fig. l;

Fig. 3 is a section on line 3--3 Fig. la;

Fig. Ll is a section on line l--t Fig. 1;

Fig. 5 is an elevation thereof; i

Fig. 6 is a section on line 6-6 and fia- 6a Fig. l;

Fig. 7 is an end elevation of one of the removable shelf-supporting sections within the drum.

With driers of the type to which my improvement belongs the drying of the material is accomplished, rst, by breaking it up `into relatively small masses which are subjected to the action of the hot gases; and second, by feeding the material over hot surfaces. It is therefore essential to provide a large amount of heating surface within the drum and to arrange this surface so that it will during the rotation of the drum properly subdivide the mass of material. As the heating surface is subjected tothecorrosive action of gaseous products of'combustion and moisture, it is frequently necessary to remove and replace portions thereof. I have therefore devised a construction in which the interior heating surface 1 is formed 1n units which are separately removable from `and replaceable within the l Patented sept. 2, i919.

outer drum. I have further provided means y of access to all of these units. Another-feature of my improvement is the construction in which the .imaterialand hot gases are first fed through the central portion of the drinn and then returned through the outer i portion thereof, this being accomplished without the necessity of providing two complete drums in concentric relation. V

1 Indetail, A is the outer drum or shell `which is ofsufficient `diameter for the re turn feedingof the material therethrough.

`This `drum is revolubly supported on suit- `able roller bearings B `engaging annular n tracks C and the drum is revolved by suitable means,1 such as the annular rack D ender,` being inclined in a direction with `relation to the rotation of the drum which will oppose the advance of material therethrough.` The interior ofthe drum `A is divided into a central compartment in alinea ment with the cylinder I and through which the gases and material pass rearwardly, and surrounding this compartment is an annular passage through which the gases and y material are"returned to the forward end `of the drum surrounding the cylinder I. `Also the space within the central and outer oppositely-extending segmental lwings `M M" with a series of shelves N outside of said wings and a` second series of shelves O inside The bars L are of `a `length thegperphery `of the drum of the-wings. to extend from i L are radial bars to which are `attached of adjacent unitswill overlap eachy other and asthese are' arranged in almement with .the cylinder I they 'form in effect an inner drum extending from the forward to the rear end of the drum A. Within the inner drum thefdpartitions O divide the space into sma-ll compartments and during the rota- 'tion yof the' drum Vthe material will be dropped off from the partition from one compartment to another andi across the path of the hot gase's traveling through the drum. In the same manner the hot material after reaching thel rear end of the drum A will be returned; through the portion of the space outside ofthe segmental wings, the units terminating short of the head F so as to provide the proper area of connection between the outer and inner compartments. To facilitate vplacing of the units the outer shell A is provided with a series of handholes arranged circumferentially thereof in planes corresponding in position to the radial ar'ms L, said hand-holes being also adjacent to the angle strips Q to which the radial arms are attached. This will provide' access from the outside of the drum to the' bolts Q which secure thearms to the strips Q, and after assembly the hand-holes are closed, preferably by a band R placed cifrcumferentially about the drum and secured by the clam R. The rings P are secured vto radial arms L by bolts P which are accessibleffrom the vinterior of the drum,

the diameter of'said rings being sufficient 'for a manto travel therethrough. The

man-hole G provides an entrance to the Vrings and thus the work of assembling or removing the units is easily performed.

To introduce the material into the drum I have provided a conveyerl Sk which eX- tendsinto the flue J, preferably near the bottoni thereof, the conveyer as well as the interior of the flue being protected by vheat insulation such as brick-work T. The opening S from the con'veyer casing into thevflue facesrearward so asto be out of the path of the hot gases, in this way avoiding overheating of the conveyer mechanism. The material isv taken out of the drum in the c'hamber at the forward end thereof which surrounds the cylindrical member I. It is essential to providea suHicife'nt area of openinEg'fOrSthe passage ofthe hot gases without undue restriction thereof and, on the other -side thereof.

bearing surface, such as Z5 hand, it is equally essential to retard the feeding of the material which is drying so as to retain it a sufficient length of time within the drum. This I have accomplished by forming a series of peripheral openings U in the end portion of the drinn A and providing a series of hinged closures V for the respective openings. The arrangeimnu is such that during rotation of the drum in the direction of the arrow the closures will cover the openings on the underside oi the drum and will open them on the upper Thus the gases are free to pass upward through the openings, while the material resting upon the bottom o l! the drum is compelled to move to the end thereof before it is discharged, and to further reta-rd the discharging of the material the end of the drinn is partially obstructed by su-itable means, such as the rings iV which will compel a rise to a predetermined height before the material can pass these obstructions and fall out of the drinn. X is a hopper below the discharge end of the drum,

and Y is a conveyer for removing the matcrial dropping therein.

In operation, the hot gases from the furnace are drawn through the drum profe 'if bly by suction, which may be produced either by ,stack or fan (not shown). The velocity of movement of the gases through the drum suflicient to carry along the ma terial introduced through the conveyor ri against the obstructing action of the spiral blades K and the frictional resistance of the partitions or subdivisions. The overlapping' segnients M and M of the different units will compel the material to pass to the rear end of the drum before it is permitted to return to the forward end thereof.y and during this passage it will be moved in contact with the heated surface with a re sult that complete drying is effected.

It is desirable to maintain the drum as nearly as possible air tight, so as to avoid drawing in of cooling air currents. I have .therefore provided a sealing means for the various joints between the revolving and non-revolving parts, such as indicated at Z, and which sealing means comprises a pair of members Zl and Z2, one of which is anchored while the other is in contact with a relatively movable member. Springs Z upon slidable rods Z4 serve to yieldably press the members Z and Z2 away from each other so that the movable men'iber Z2 will be held in contact with the coperating The members` Z and Z2 are arranged surrounding the drum, and an air-tight joint is maintained between these members by a flexible band ZG surrounding the same but permitting of relative movement. Thus the member Z2 being held yieldably in contact with the member Z5 will seal thejoint, while the flexible band Z will seal the joint between the members Z and Z2 and will permit relative longitudinal movement thereof.

In arranging the shelves upon the unit sections the angles thereof are selected with respect to the distance from the center and also with regard to the amount of moisture in the material supported thereby. Thus the material being introduced rst in the center of the drum is in a very moist condition and the shelves at this point are angled to facilitate discharge from one shelf to another, while in the outer portion of the drum where the material is partly dried the shelves are angled to have a greater tension on the maferial. This differential arrangement is useful in securing the greatest efficiency with a given amount of shelf surface.

IWhat I claim as my invention is:

1. In a drier, the combination with a revoluble drum, of a series of sections for subdividing said drum independently removable from and replaceable therein, and means mounted on said sections for separating the space in said drum into an inner and a surrounding compartment having communication at the end only of the drum.

2. In a drier, the combination with a drum, of a series of radially-arranged sec tions within said drum, means' within the drum for attaching the outer ends of said sections to thel periphery of the drum, and means ofaccess to said attachment means comprising an annular band surrounding the drum and removable therefrom, said band covering a series of hand-holes adjacent to the several attachment means.

3. In adrier, the combination with a drum, of an interior structure therefor, comprising a series of unit sections leach consisting` of a plurality of radially-extending bars, longitudinal bars attached thereto, rings attach able to and connecting the inner ends of said units, means within the drum for attaching the outer ends of said units thereto, said means being accessible through hand-holes in the drum, and an annular closure for covering said hand-holes.

4. In a drier, the combination with a drum, means for introducing and taking out material from the same end of the drum at different distances from the center thereof, an interior structure formed in unit sections independently removable from and replaceable in said drum, and means mounted on said sections for separating the inner and sections having longitudinallyextending shelves mounted thereon, and means also mounted on said sections for dividing the drum into concentric inner and outer compartments. A

6. In a drier, the combination with a rotary drum, of means at one end of the drum for passing hot gases through said drum, and means at the same end of the drum for introducing material to be dried into the drum, said introducing means being out of the direct path of the hot gases and thermally insulated therefrom.

7. In a drier, the combination with a drum through which the material to be dried and drying gases are passed, the end portion of said drum being provided with peripheral openings, of means for automatically closing said openings in the lower p0rtion of said drum to retain the material therein and for automatically uncovering the openings in the upper portion of the drum for the escape of the gases.

8. In a drier, the combination with a drum having peripheral openings in the discharge end thereof, of hinged members for closing said openings in the lower portion of the drum and automatically opening the same in the upper portion thereof.

9. In a drier,the combination with a rotary drum having peripheral openings in the discharge end thereof, of means for automatically closing said openings in the lower portion of the drum and opening the same in the upper portion thereof, and obstructing means in the end of the drum.

l0. In a drier, the combination with a rotary drum having peripheral openings in the discharge end thereof for the escape of gases, of means for closing said openings in the lower portion of the drum to prevent discharge of the material to be dried there through, and a ring at the end of the drum forming an obstruction for retarding the discharge of the material therefrom.

11. In a drier, the combination with a rotary drum, of an interior structure for said drum comprising a series of radially-arranged unit sections, said sections having longitudinally-eXtending shelves carried thereby, the angle of said shelves being varied from the inner to the outer portion of the drum.

12. In a drier, the combination with a ro tary drum, of a stationary member, and sealing means therebetween comprising a member anchored to said stationary member, a second member yieldably held in contact with said rotary drum, and a flexible band surrounding said sealing members.

In testimony whereof I affix my signature.

ANTONY wnnfrnunucn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.