US889009A - Drier. - Google Patents

Description

. PATENTED MAY 26, 1908. P. W. HOLS'IEIN. DRIER APPLICATION FILED AUG. 23,1906.

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Arm 889,009. PATENTED MAY 26, 1908. P. w. HOLSTEIN.

DRIER.

APPLICATION FILED MUG. 23,1906.

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UNITED STATES PATENT oEEroE.

PAUL W. HOLSTEIN, OF COLUMBUS, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE JEFFREY MANUFACTURING COMPANY, A CORPORATION OF OHIO.

DRIER.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed August 23, 1966. Serial No. 331,798.

To all whom it may concern:

Be it known that I, PAUL W. HoLsTEIN, a citizen of the United States, residing at C0- lumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Driers, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to steam driers, and its object is to provide a drier in which a current of heated air is brought into direct contact with the material to be dried, the material being meanwhile constantly agitated; and to maintain a high temperature in the drying chamber, and to facilitate the discharge of the condensed steam.

In rotary steam driers of the inclineddrum type heretofore used, a single dryingcoil secured to the inside of the drum-shell and rotating therewith has been found disadvantageous for the reason that the extreme length of the coil condenses the steam supplied to it more rapidly than the water of condensation can be effectively discharged from the coil. This difficulty is obviated by the improvement hereinafter described and shown in the accompanying drawings, in which Figure 1 is a longitudinal view, artly in elevation and partly in section, 0 my imroved drier. Fig. 2 is a section on the line l III of Fig. 1, looking in the direction of the arrow a. Figs. 3 and 4 are details of the checlcflange for the head-plate of the drum; and Fig. 5 is a detail showing one form of clamp for securing the coils to the interior of the drum. Fig. 6 is a partial end View of the upper end of the drum showing the arrangement of exhaust ducts and exhaust fan.

1 is the rotary, inclined drum mounted in suitably supported bearings 2, 2, and driven by a gear- train 3, 3, of any desired character. The drum supports comprise spiders 4,- 4, having hollow trunnions, through the axial openings 5, 5 of which trunnions the heating means can be supplied with steam from a main 6, by means of a swivel connection 7. A similar discharge swivel 7 at the opposite end, serves as an outlet for the water of condensation.

Into the inner ends of each of the trunnions is screwed a manifold 8, shown in the drawings as having four lateral openings; though it will be understood that any desired number of'laterals may be used. To each of the laterals of the supply manifold is connected a radial pipe 9, preferably provided with a union 10, for convenience in making up. Each radial branch 9 supplies an independent heater-coil 11, made up of longitudinal pipes and returns, as shown, and provided at the opposite end of the drum with a radial outlet 12, connected to the discharge manifold. The coils 11 are secured to the interior of the drum 1 by clips 13 and bolts 14 in the manner shown in Fig. 5.

The drum is also provided with lifting blades 15, for raising the material to be dried, as the drum rotates.

Surrounding the drum is a casing 16, preferably of wood, and provided near its for- Ward end with a plurality of air-inlets 17, each of which may be closed by a pivoted cover 18. This casing is closed rearwardly by a plate 19, of any suitable material, and at its forward end by an apertured plate 21, to which is attached the check-flange 22, shown in detail in Figs. 3 and 4. A ring 23, preferably of angle iron, is attached to the interior of the drum 1 and makes a practically air-tight joint between the moving drum and the stationary casing, as will be readily understood from Fig. 1.

Secured to the forward end of the casing is a feed-hopper and chute 20, which serves to introduce the material into the drum just above the forward trunnion.

Two exhaust hoods 24 also project through the plate 21, one hood being located on each side of the forward trunnion and connected by a conduit 25 to the transversely arranged intake of an exhaust-fan 26, as will be readily understood.

The material, after having passed the length of the drum and having been dried in transit, is received by a hopper or chute 27, provided with a drop door 28.

The operation is as follows: The material received at the forward, upper end of the drum is raised and let fall by the blades 15 constantly moved over the coils 11 and dropped across the drum; meanwhile being slow y fed toward the exit end of the drum. At the same time, air entering at 17, passes backward in contact with the outside of the shell 1, is heated thereby, then enters between the plate 19 and the end of thedrum, passing thence through the length of the drum and in direct contact with the falling material, and is finally drawn off by the fan made of any length and number to most efficiently heat the air and material, and most readily discharge water from the coils without clogging the same.

Many changes can be made in the apparatus without departing from my invention; since WVhat I claim is 1. In a drier, a rotatable drum, a plurality of heating-coil sections constituting a cagelike structure concentric with said drum and secured interiorly to the periphery thereof,

means for supplying steam to and means for draining water from each of said sections while in motion.

2. In a drier, a rotary drum, hollow trunnions therefor, swiveled fluid connection at the exterior ends of said trunnions, a manifold at the interior ends thereof and a plurality of independent coil-sections constituting a cage-like structure, each of said coil-sections being suitably interiorly secured to the periphery of said drum and connecting said manifolds.

3. In a drier, a rotary drum mounted on hollow trunnions, swiveled fluid connections at the exterior ends of said trunnions, and a plurality of independent, segmental coilsections connecting the interior ends of said trunnion openings, said sections constituting a heating surface concentric with said drum.

4:. In a drier, an inclined, rotary drum mounted on hollow trimnions, outer fluid mounted on hollow trunnions, outer fluid connections for said trunnions located at opposite ends of said drum, manifolds at opposite ends of said drum and connected to the inner ends of said trunnions, and a plurality of independent coil-sections constituting with said manifolds a cage-like structure each of said coil-sections being suitably secured to the periphery of said drum, the opposite ends of each of said coils being connected to said manifolds.

6. In a drier, a rotary drum, a plurality of heating pipes adjacent the periphery of said drum and constituting a cage-like structure concentric with said drum and lifting blades inclined outwardly and in direction of rotation each of which is secured to the interior of the periphery of the drum and is arranged to lie in a plane approximately tangential to one of said heating pipes.

In testimony whereof I ai fix my signature, in presence of two witnesses.

PAUL W. IIOLSTEIN.

Witnesses:

H. S. RANSOM, S. J. WHITE.

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