US1595659A

US1595659A - Drying and cooling apparatus

Info

Publication number: US1595659A
Application number: US682837A
Authority: US
Inventors: Harlan W How
Original assignee: Buffalo Foundry & Machine Comp
Current assignee: Buffalo Foundry & Machine Co; Buffalo Foundry & Machine Comp
Priority date: 1923-12-26
Filing date: 1923-12-26
Publication date: 1926-08-10
Anticipated expiration: 1943-08-10

Description

Aug. 10 1926.

H. W. HOW

DRYING AND COOLING APPARATUS Filed Dec. 26

Attyis.

Gil

Patented r run". 10, 192%.

UNITED STAil' 'ES rsassse ee'raur caries.

EAR-LAN W. HOW, OF BUFFALO, NEJV YORK, ASSIGNOR TO BUFFALO FOUNDRY 8.: MACHINE COMPANY, OF BUFFALO, NEVJ YORK, A CORPORATION OF NEW YORK.

DRYING AND COOLING APPARATUS.

Application filed December 26, 1923. Serial No. 682,837.

This invention relates to a cooling and drying apparatus which embodies in its general organizat'on a rotary shell or drum through which the material to be treated is passed from one end' to the other and during this passage is subjected either to a heating or cooling medium and elevated within the shell during such passage, so as to thoroughly expose allparts of thematerial to the heating or cooling mediumand thus facilitate finishing of'theiproduct,

In devices of this character asfheretofore constructed the material under treatment engaged directly with the inner" side of the wall or shell of the apparatus and this necessitated dismountingthe entire apparatus including the dismemb'erin'g ofits bearings, driving mechanism, and so forth,"whenever the shellor wall required renewal. In such apparatus 7 as V heretofore constructed, the temperature insulation was usually applied to the outer side of the shell which is objectionable by reason of the fact that itwas difficult to firmly attach suchinsulation on the exterior of the shell and this resulted in the insulation frequently becoming separated from the shell and falling off and necessitating frequent repairs.

It is the object of this invention to provide an apparatus of this character in which the temperature insulation is arranged on the inner side of the shell where the same cannot become detached therefrom and also to provide the shell on its inner side with a lining which receives the wear and is capable of being renewed from time to time whenever this lining, become-s worn out,

thereby enablingthe main shell'or wall to be employed continuously and avoiding'the necessity ofdismembering the apparatus to any considerable extent when repairs 'or making replacements due to wear mustbe effected.

lnthe accompanying drawings:

Figure 1 is a vertical longitudinal section showing a practical embodiment of my invention in a rotary drier or cooler. Figure 2 is a vertical cross section of the same on an enlarged scale taken on line 2 2, Figure 1. Figure?) is a fragmentary cross section of theshell, taken on an enlarged scale, the temperature insulations and internal lining on the same and also the material, lifting blades or buckets mounted on the inner side of the shell.

'tially thereof are Similar characters of reference refer to like parts in the several views.

-The numeral 10 represents the cylindrical shell, drum or wall of the apparatus which is preferably constructed of sheet metal in the manner now commonly practiced, and rotatable about an axis whichis either i11- clined slightly from its front end toward its rear end relatively to the horizontal, as shown in Figure 1, or may be arranged horizontally or in any other desired'ipositionas best suits the particular material which is to be treated. This shell may be rot'atably supported by any suitable means, but'in the preferred construction this is accomplished by "providing the shellon its periphery near its front and rear ends with circumferential tires or

rings

11, 12 which run on supporting rollers 13 engaging with the underside of the tires'and mounted in suitable man'- ner upon base blocks 14'.

int-he present instance, the material is assumed to enter at the front end 15 of the shell which is elevated anddischarged therefrom at its depressed rear end 16. When the material under treatment is to be heated, this may be accomplished by conducting heat from anoven 17 into the depressed rear end of'the shell from whence it passes forwardly through the latter and iscarried away from the elevated front end thereof into a stack or chimney 18. Various means may be employed for rotating this shell by power, but as the same form no part of thisinvention no particular reference" will'be made "to them. i r I ,Arranged. lengthwise on the inner side of the shell at different points circumferenplurality of metal Jrib s, each of which is preferably constructed of L-shape or in the form of an angle iron'arid arranged with its outer base dang-e19 substantially parallel or concentric 'witl the shell: and adjacent to the inner side thereof, while its inner flange '20 projects radially inward from one edge of the base flange. in order to reduce the transmission of temperature from the interior of the shell to the outer side thereofthrough the medium f these ribs, a heat insulating strip 21 con sisting preferably of asbestos is interposed between the base of each rib and the inner side of the shell and rivets 22 are passed through the shell, the baseiof eachrib and the intervening temperature insulating strip 21 for the purpose of lirmly uniting these members, as best shown in Figure 3. Temperature changes within the shell are also pr vented from reaching the exterior of the same along the spaces between the ad centribs by means or a temperature insuia 23 which is preferably constructed of mental form and e i 'ed its opposite lon k gitudinal edges with the opposing sides two adjacent ribs while its outer side engages with the inner side of the adjacent part of the shell.

This segmental temperature insulation is preferably constructed of cellular asbestos, as shown in Figure 3, but ii desired any other suitable temperature insulation may be used such as magnesia. Upon the inner edge of the radial i'la'n 'e of each rib is mounted a lifting wing, blade or bucket 24 which is preferably constructed of sheet metal. The inner side of the segmental temperature insulation between adjacent ribs is covered by a lining 25 of metal which is of segmental form and preferably concentrio with the shell and constructed or sheet metal. Each of these segmental lining sections is detachably mounted on the adjacent ribs of the shell so that the same can be removed therefrom when reduir-ed by pro viding the longitudinal lining section 25 with inwardly projecting

flanges

26 and 27, the flange 26 engaging with one side of the lifting blade 24: which is mounted on one of the respective pair of ribs, while the flange 27 engages with the adjacent side of the radial flange of the rib upon which the other lifting blade 01 the respective pair is mounted. The radial flange of each rib, the lifting blade 2% and the two

flanges

26, 27 of the proximate lining sections 25 on opposite sides of the same are d-etachably connected with each other by means of bolts 28 passing through these members, as best shown in Figure 3.

Obviously cold air or air of ordinary temperature may be conducted through this shell by any suitable means if it is intended to cool the material under treatment instead of heating and drying the same, it being understood that the material while passing from the inlet to the outlet of the shell is repeatedly lifted by the blades or buckets, so as to expose the material to the action of the hot air, cold .air or other medium which is intended to act upon the material.

W hen this apparatus is in use, the material under treatment which passes through the shell engages with the inner sides of the lining sections 25 so that any wear resulting from the attrition of this: material will be taken by these lining sections, and when the same are worn out it is possible to easily renew them .and thereby save the shell or main wall 10 from such wear. Such renewal can be effected quickly without the necessity of dismounting the shell itself, thereby enabling such renewal to be effected economically and without prolonged inter ruption in the use of the apparatus which otherwise would be necessary.

Furthermore, by arranging the temperature insulation on the inner side of the shell in the manner shown and described, this insulation is held firmly in place and is not liable to become dislodged when the ma chine is in use, thereby enabling the same insulation to be used continuously without requiring any replacement and thus further increasing the economical operation of the machine. 7

Moreover, the manner in which this rnewal lining and the temperature insulating elements are constructed, mounted and arranged within the shell permits of constructing this apparatus by means of ma terials which are of standard construction and thereby enables this apparatus to be manufactured at comparatively low cost.

I claim as my invention:

1. A drying and cooling apparatus comprising a rotary tubular shell, a temperature insulation engaging with the inner side of said shell, and a renewable lining engaging with the inner side of said insulation.

2. A drying and cooling apparatus comprising a rotary tubular metal shell, a plurality of longitudinal metal ribs secured to the inner side of the shell, temperature insulation interposed between said ribs and the shell, and lifting blades mounted on said ribs.

3. A drying and cooling apparatus comprising a rotary tubular metal shell, a plurality of longitudinal metal ribs secured to the inner side of the shell, temperature in sulation interposed between said ribs and the shell, and temperature insulation arranged on the inner side of said shell be- 7 tween said ribs.

4. A drying and cooling apparatus comprising a rotary tubular metal shell, a plurality of longitudinal metal ribs secured to the inner side of the shell, temperature insulation interposed between said ribs and the shell, lifting blades mounted on said ribs, and temperature insulation arranged on the inner side of said shell between said ribs.

5. A drying and cooling apparatus comprising a rotary tubular metal shell, a plurality of longitudinal metal ribs secured to the inner side of the shell, temperature insulation interposed between said ribs and the shell, temperature insulation arranged on the inner side of said shell between said ribs, and an inner metal lining arranged on the inner side of the insulation between adjacent ribs.

6. A drying and cooling apparatus comprising a rotary tubular metal shell, a plurality of longitudinal metal ribs secured to the inner side of the shell, temperature insulation interposed between said ribs and the shell, temperature insulation arranged on the inner side of said shell between said ribs, and an inner metal lining arranged on the inner side of the insulation between adjacent ribs and detachably connected with the latter.

7. A drying and cooling apparatus comprising a rotary tubular shell, a plurality of longitudinal metal ribs of L-shaped form in cross section each having an outer base flange arranged circumferentially next to the shell and secured thereto and having an inner attaching flange projecting radially inward from the base flange, a temperature insulating member arranged between each base flange and the shell, temperature insulating segments arranged on the inner side of the shell between said ribs, lifting blades secured to the inner edges of the radial flanges of said ribs, and metal lining sections engaging with the inner sides of said insulating segments and provided with inwardly turned flanges which are secured to opposite sides of said radial flanges and blades. 7

In testimony whereof I aflix my signature.

HARLAN W. HOW.