US1196376A - Drier. - Google Patents

Description

W. V. MEYER.

DRIER.

APPLICATION FILED JAN-3.1914.

Patented Aug. 29, 1916.

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WILLIAM V. MEYER, OF CHICAGO, ILLINOIS.

DRIER.

Application filed January 3, 1914.

To all whom it may concern:

Be it known that I, WILLIAM V. MEYER, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have made certain new and useful Improvements in Driers, of which the following is a specification.

My invention relates more particularly to that class of driers which is used for desiccating finely divided material and powders where it is necessary and desirable to expose the individual particles to the hot air or gases passing through thedrier to the greatest possible extent, and it is applicable to drying grain, paint materials, chemicals, etc.

The invention is shown and described hereinafter as an improvement upon a type of drier shown in patent to Meyer, No. 771,994, dated October 11, 1904, but it will be evident from the detailed description that in some or all of its features it is applicable to other and various forms ofdrier.

While in the following specification I have described and in the accompanying drawing shown a preferred embodiment of my invention it is to be understood that the detailed disclosure is for the purpose of exemplification only and that the scope of the invention is defined in the following claims in which I have endeavored to distinguish it from the prior art so far as known to me without, however, relinquishing or abandoning any feature thereof.

In the accompanying drawing Figure 1 is a side elevation of a drier of the type to which my invention is applicable and Fig. 2 is an end elevation of the same on an en larged scale showing the improved construction as it appears in operation.

Referring first to Fig. 1, the drier is seen to consist of an elongated tube or cylinder .3 which is mounted upon anti-friction rolls 4, 4 upon stands 5, 5. It will be understood that the cylinder may be turned by any suitable mechanism. The material to be treated is supplied through a chute 6, fragmentarily shown in Fig. 1, and as the drier revolves progresses gradually from one end to the other of the drier and is heated and dried by gases coming from the burner 7 mixed with such air as may be drawn into the heater and fed along with such gases or products of combustion. In common with. the device upon which my drier is an improvement it is composed of an outer shell Specification of Letters Patent.-

Patented Aug. 29, 1916..

Serial No. 810,102.

or cylinder 8 and an inner shell 9 between vided with longitudinal ribs 10 for a pur- 2' pose which will be described. The inner tube or cylinder is likewise provided with shelves 12 as in the former construction but these shelves are different from those of the former construction in features which will presently appear. The shelves 12 are all arranged tangentially with respect to the inner cylinder and are attached to their outer edges by straps 13 to the inner wall of the outer cylinder, the straps 13 being preferably located substantially in the same plane with the respective shelves to which they are attached. The shelves 10 and 12, it will be understood, may and preferably do extend substantially the length of the drier but the straps 13 are of comparatively little breadth, it being only essential that they be broad enough to have the required strength to properly support the shelves 12.

In my improved drier the radial shelves found in the construction of the patent referred to above, are omitted but the tangential shelves 12 are provided on both sides thereof with series of longitudinal ribs 14, 15 over which the material dribbles as the drier revolves. By omitting the radial shelves and providing the ribs referred to above, the material being treated is dribbled as the drier revolves from one step to the next the entire length of each shelf, the action being well shown in Fig. 2 of the drawings. Thus, if we follow a particular group of elements of the dried through a complete cycle, beginning at the bottom it is seen that the outer Wall of the drier receives most of the material at this point and as the drier revolves the granular or other material being treated is first received upon the shelf projecting from the inner wall of the outer cylinder. As the shelf rises higher and turns toward the horizontal the material begins to dribble over the edge thereof and to fall upon the following tangential shelf extending from the inner cylinder. Were it not for the longitudinal ribs thereon the granular material would slide down the face of the tangential shelf and into the pocket between the latter and the inner cylinder. The ribs 1 f, however, intercept the material and it is dribbled over each rib successively until it substantially occupies said pocket. As the shelf projecting from the outer cylinder reaches a position near the top, the material thereon begins to be spilled or dribbled upon the rear face of the tangential shelf in advance of said outer shelf and likewise flows over the edge of the successive ribs into the pocket between said tangential shelf and the inner cylinder.- As the revolution of the drier continues the pocket between the tangential shelves which has now received all or practically all of the material, reaches a position shown at the right of Fig. 2 in which the material begins to dribble in a reverse direction over the ribs upon the back of the more advanced tangential shelf and from the outer rib or lip thereon on to the back of the outer shelf in advance thereof and upon the further rotation of the drier the material dribbles from said lip on to the cylindrical wall of the drier. This completes the cycle of operations of the drier and it will be readily seen that by the omission of the radial shelves of the former device and the provision of the ribs each particle of the material is exposed to the heated air or products of combustion a great many more times than would be possible with the old construction. 'But furthermore, I have found that by the particular manner in which the tangential shelves are attached to the outer shelf I avoid breakage and wear ing out which is incident to a construction in which the cylinders or tubes are connected together by radial bolts as heretofore. 7 With the repeated heating and cooling to which such driers are subjected there is a torsional effect upon the bolts which ultimately destroys their connection to the cylinders by constantly straining and bending the same. On the contrary in my improved device as the metal parts heat up the shelves and their connections expand but in doing so merely rotate the inner cylinder slightly with reference to the outer cylinder because of the tangential arrangement of said shelves and straps. Thus no material strain is put upon the metal and the driers last very much longer.

I claim:

1. A drier comprising an inner and an outer cylinder and shelves thereon by which in the revolution of the drier the material treated is repeatedly sifted or dribbled from one element to another, connecting means between the outer and inner cylinder arranged substantially tangential to the latter for the purpose described.

2. In a drier, an inner and an outer cylinder, substantially tangential shelves arranged upon the former and connections from said shelves to the outer cylinder.

3. In a drier of the class described, inner and outer concentric cylinders, tangential shelves upon the inner cylinder and connections in the plane thereof to the outer cylinder.

4. In a drier of the class described, an inner and an outer cylinder, tangential shelves arranged on the inner cylinder, connections from said shelves to the outer cylinder and shelves upon the interior of the outer cylinder.

5. In a drier of the class described, an inner and an outer cylinder, tangential shelves arranged on the inner cylinder, longitudinal ribs on said tangential shelves and shelves arranged upon the outer cylinder.

6. In a drier, an inner and an outer cylinder, tangential shelves arranged on the inner cylinder, longitudinal ribs upon each side of said shelves and shelves upon the outer cylinder.

7. In a drier of the class described, an inner and an outer cylinder, shelves on the interior of the outer cylinder and on the exterior of the inner cylinders and longitudinal ribs on said shelves.

WILLIAM V. MEYER.

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

' Washington, D. C.

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