US1038511A - Cooler. - Google Patents

Description

A. E. ANDERSEN.

COOLER.

APPLIGATION FILED DEC. 21, 19m.

2 SHEETS-SHEET 1.

Lama

Patented Sept. 17, 1912.

A. E. ANDERSEN.

COOLER.

APPLICATION FILED DEG.21,1910.

Patented Sept. 17, 1912.

2 SHEETS-SHEET 2.

5 mm Moz inseam.

' NMARK, assumes no r. L. SMIDTE a 00.,

ALFRED E. ANDERSEN, 0F COPENHAGEN, DE

015 NEW YORK, N. Y., A COILPOEATIOH OF YORK.

COOIiER.

Specification of Letters Patent.

Patented Sept. 17, 1912.

To all whom it may concern:

a subject of the King of Denmark, residing "m Copenhagen, Denmark, have invented certain new and useful Improvements in {invention shown in Figs. 1 and 2, the improved cooling ap aratus comprises one or more drums a, pre erably cylindrical, eccentrically disposed with respect to an axis'of revolution. If several drums or cylinders a :are provided, they should be symmetrically disposed about the axis of revolution. They Coolers, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

Certain materials which have been subjected to great heat and must be cooled, such, for example, as nodules of iron ore, magnesite and caustic lime which has been burned in rotary kilns, sufl'er more or less injurious results when subjected to the acrin tion of ordinary coolers in which the material is repeatedly lifted and allowed to fall or in which it comes into too sudden contact with cold air or is cooled in the presence of an excess of air. Thus, the nodules of iron ore are liable to be broken up and to form dust when cooled in an ordinary cooler, and moreover under some conditions the nodules take up so much oxygen from the air as to offset to some extent the desirable reduction which has been accomplished. Magnesite and possibly other minerals which have been fused are also liable to be broken up to such an extent as to create dust not only through the mechanical action of the ordinary cooler, but also through sudden contact with cold air. Caustic lime, dischargedhot from the rotary kilns in which it has been burned, may also take up carbonic acid from the air when cooled in the ordinary manner.

Itis the object of this invention to overcome the objections which, for such materials as those referred to, are incident to the use of the ordinary coolers and to produce a cooler which reduces as much as possible the objectionable mechanical action of the ordinary coolers and also permits of indirect cooling of the material, either partly or wholly out of contact with the cooling me.- dium.

The invention will be more full explained hereinafter with reference to t e accompanying drawings in which it is illustrated, and in which- 7 .Figure 1 is a view in longitudinal section of a cooler constructed in accordance with the invention. Fig. 2 is a partial view in section on the planeindicated by the line 2--2 of Fig. 1.- Fig. 3 is a view similar to 'Fi Be it known that I, ALFRED E. ANDERSEN, bo

=tial view in section on the plane indicated by the line 44 of Fig. 3.

l but showing a slightly difierent emlment of the invention. Fig. 4 is a par- Referring first to the embodiment of the are mounted at their ends in end housings b I and c which may be provided with carrying d to rest upon rollers (1' so that the entire structure may be rotated by any convenient means not necessary to be shown through which a chute 6 may be projected to deliver the material to be cooled into the housing 6, from which it finds its way into the drums a through their open ends. The open end of the housing 6 is preferably inclosed by a wall j which forms a chamber 1", through which the air, heated directly or indirectly by exchange of heat with material to be cooled, ma be conducted away. The housing a, which material from the open ends of the drums at, is preferably projected into a stationary cas ing 9 into which the material is discharged from the housing a and from which it may in turn be discharged into any desired re-. ceptacles, not shown.

herein. The housing I) has a marginal flange 6' around a central opening 6,

receives the cooled Each of the drums a is surrounded by a jacket a, a chamber a, being thereby formed chamber is open at'its discharge end, as at a, so that the heated air therein may be (hecharged into the housing 6 and thence into At the rear end of the cooler an air pipe the c amber f.

between each drum and its jacket, which k, which may be connected with a fan or other source of air or other cooling medium under pressure, is pro ected through the stationary casing g and is carried forward centrally between the 1 jacketed drums a, its forward end being closed in a plate It. At intervals along its length t e tube h is plzovided with ducts h, k, h which commumcate with the chamhers a between the drums a and their jackthe tube 71. so as to control somewhat the dis-' tribution of the cold air and especially to prevent the immediate contact of the cold air with those parts of the drums which are highly heated by contact with the hot mate- 'rial discharged into the cooler. The tube h- -may also have openings h, provided with adjustable slides h", through' which, if desired, a regulated quantity of the cooling medium may be admitted directly into the housing 0 and thence into the drums a, the cooling of the material being thus efiected by direct contact with the cooling medium. When the openings h are closed, however, the cooling of the material is effected indirectly and without actual contact with the air.

The embodiment of the invention shown in Figs. 3 and i is generally similar to that shown in Figs. 1 and 2, and like parts in the several figures are identified by like letters of reference. The discharge chamber 9 of the construction shown in Fig. 1, however, is omitted from the construction shown in Fig. 3', the material which is received by the open ended housing 0 from the drums a being directly discharged from such housing into any suitable receptacles. To prevent the immediate access of cold air tothe drums at from the openhousing 0, the rear ends of each drum are provided with cross walls 2' which have marginal openings 2" in different relative positions. .In the revolution of the drum about the axis of revolution the opening z" in some one of the cross walls i will be closed by the material which lies upon the lower side of the drum and the direct access of cold air to the interior of the drum will thereby be prevented without in-' terfering seriously with the travel of the cooled material outward through the openings in the cross Walls and from the drums into the housing 0.

It will now be understood that when the apparatus is rotated and heated material is delivered thereto at one end while air or other cooling medium is supplied through the central pipe h, the material to be cooled, which is discharged through the chute 6 into the housing b passes thence into each drum a, as, in the course of its revolution, it reaches the lowest point, and then travels slowly through such drum, in the continued revolution of the cooler, to the housing 0 whence it is discharged. The inflowing material will become so piled in that drum which is receiving the same that an inclined floor will be formed by the material and an unbalanced force will be constantly tending to push the same through the drum during the revolution of the same. The heated material, in its travel through the drums a, is not lifted and dropped but travels always in contact with the wall of the drum which is cooled externally by the cooling medium in the jacket (1 so that an exchange of heat takes place between the heated material and the cooling medium. As already explained, the cooling of the material-is carriedon indirectly and out of contact with the cooling medium unless the cooling medium is purposely admitted to the interior of the drums.

- The apparatus has been described herein as a cooler for heated material, but obviously it provides 'for' an exchange of heat between materials of different temperatures and might be used for the heating of one material as well as for the cooling of another material. In fact, the air or other cooling medium employed when heated by absorption of heat from the hot material, may be conducted away from the apparatus and its heat may be made to serve some useful purpose.

Obviously the construction and arrangement of the apparatus may be varied to suit different conditions of use and the invention, therefore, is not restricted to the precise constructions shown and described herein.

I claim as my invention:

.1. A cooler comprising a longitudinal drum revoluble about an axis to whichit is eccentric, housings by which the drum 1s supported, a jacketabout the drum, means to deliver tothe drum through one of the housings the material to be cooled, a central pipe for the cooling medium extending throughout the length of the drum, and a plurality of ducts extending therefrom into the jacket of the drum intermediate the ends of the latter.-

2. A cooler comprising revoluble end housings, longitudinal drums carried by said housin s and symmetrically disposed about the axis of revolution, means to deliver to said drums through one of said housings the material to be cooled, jackets about said drums and a central pipe connected with said jackets intermediate their ends to supply a cooling medium.

3. A' cooler comprising a longitudinal drum revoluble about an axis to which it is eccentric, housings by which the drum is supported, ajacket about the drum, means todeliver to the drum through one of the housings the material to be cooled, a central pipe connected with said jacket intermediate its ends to supply a cooling medium, and means to admit a limited quantity of a cooling medium to said drum.

4. A cooler' comprising a longitudinal drum, a revoluble end housing by which the drum is supported for revolution about an axis to which it is eccentric, means to deliver to the drum through the housing the mate-- charge of the cooled material is permitted rial to be cooled, a 'acket about the drum, 'while the admission of air is limited. 10 means to supply to t e jacket a cooling me- This specification signed and witnessed dium, a plurality of partitions disposed inthis 29th day of November A. D., 1910. V

5 teriorly of the drum adjacent its discharge ALFRED E. ANDERSEN.

end, a duct in each of said partitions so Signed in the presence of-- disposed as to-be out of register with the CARL V. HENNIGE duct of the adjacent partition whereby dis- HANS CHR. NIELSEN.

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