US1015796A - Drying apparatus. - Google Patents

Description

A. GERLAGH.

DRYING APPARATUS.

APPLICATION FILED JULY 27, 1911.

Patented Jan. 30, 1912.

)1 Fig.4.

Wa'iness es;

5% E Md ALBERT GEBLACH, OF NORDHAUSEN, GERMANY.

DRYING APPARATUS.

Specification of Letters Patent.

Patented Jan. 30,1912.

Application filed July 2'7, 1911. Serial No. 640,756.

To all whom it may concern:

Be it known that I, ALBERT GERLACH, a subject of the German Emperor, and residing at Nordhausen, Germany, have invented certain new and useful Improvements in Drying Apparatus, of which the following is a specification.

My invention relates to drying apparatus having stationary heating surfaces, and a primary object is to distribute large heating surfaces in a small chamber while preventing the materials to be dried adhering to the heating surfaces.

A further object is simultaneously to increase the safety of working and durability of the apparatus owing to the omission of all stuliing-boxes which cannot be done without in apparatus comprising rotatable heaters.

To these ends, I arrange centrically in a steam-heated trough a horizontal, stationary, cylindrical heater whose inner and outer heating surfaces are completely utilized for heating.

One illustrative embodiment of my invention is represented by way of example in the accompanying drawing, wherein Figures 1 and 2 are vertical transverse sections of two forms of my invention. Fig. 3 is a vertical longitudinal section of the form shown in Fig. 1 and Fig. 4 is an end elevation thereof partly in section.

Referring to Figs. 1 and 3 the letter 6 designates my heater arranged centrically in the steam-heated trough d. The material to be dried entering into the apparatus at one end at 0, passes into the interior of the double-walled, steam-heated cylinder e and is here seized by a rapidly rotating system of blades f which throw it toward all sides and simultaneously continuously scrape ofi any of it dried adhering to the hot walls. Owing to the worm-like arrangement of the blades the material to be dried is simultaneously fed toward the other end of the apparatus b. The material here leaves the drum and falls into the steam-heated trough d. A second, slower rotating system of blades g which is journaled, on the one hand, on the journal 6 of the stationary heating cylinder 6, and, on the other hand, by means of a ring 6 and rollers, not shown, conveys the material to be dried to the outlet 0 and simultaneously lifts the said material. The outer blades of the system or rim of blades 9 push the material lying on the bottom of the trough in front of them until it partly slides olf them at about the position it in Fig. 1 and falls onto the inner blades therebelow in order to,

be pushed by these blades over the upper part of the stationary cylinder into the position 71. From here the material slides and falls freely to the bottom of the trough. The described operation is constantly repeated so that the material moves from b to the outlet 0 spirally about the doublewalled drum. The available heating surface is completely utilized, because even the lower, outer part of the cylinder free from material acts by radiation on the material in the bottom of the trough.

For materials which lose their adhesive properties toward the end of the drying operation, as for example molasses food-stuffs, beetroot chips, and the like, my hereindescribed apparatus can be made in combination with a so-called after-drier. Fig. 2 shows such a combination. The after-drier 70, whose employment and construction are known, comprises a non-heated trough Z in which a heater m comprising tubes m moves. A rotating rim of blades n uniformly distributes the material to be dried over the section of the nest of tubes.

I claim 1. In drying apparatus, the combination, with a double-walled trough, of a horizontal, cylindrical stationary heater centrically mounted therein.

2. In drying apparatus, the combination, with a double-walled trough, of a horizontal, cylindrical stationary heater centrically mounted therein, and means rotatable in the heater for spirally conveying material'to be dried through the interior of the same.

3. In drymg apparatus, the combination,

with a double-walled trough, of a horizonthe said cylinder to the other end of the I tal, cylindrical stationary heater centrically trough. 10

mounted thereln, means rotatable in the In testimony whereof, I affix my signature heater for conveying material to be dried in the presence of two witnesses.

through the same to one end of the trough, ALBERT GERLAOH. and means rotatable about the heater for Witnesses: v i conveying the material from the said end of g WOLDEMAR HAIIPT, the trough spirally about the outer wall of HENRY HASPER.

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

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