US1318133A - Drier - Google Patents

Description

L. R! CHRISHE.

DRIER.

APPLICATION 'gHLED JAN.6 1919.

Patented Oct. 7, 1919.

5 Q. XWZW ans a*r DRIER.

Specification of Letters Patent.

Patented @ct. t, 1919.

Application filed January 6, 1919. Serial No. 269,754.

To all whom it may concern Be it known that I, LINDSAY R. CHRISTIE, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Drier's; and

I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to driers, and has special reference to what are known as indirect heat driers for use in drying powdered and granular or clayey material.

The object of my invention is to produce a cheap, simple and eflicient form of a drier which can be conveniently and easily operated, will be strong, compact and not liable to get out of order, andwill quickly and thoroughly dry the material fed to the same.

To these ends my invention consists, generally stated, in the novel construction, arrangement and combination of parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims. n

To enable others skilled in the art to which my invention appertains to construct and use my improved drier, T will describe the same more fully, referring to the accompanying drawings, in which- Figure 1 is a Yertical longitudinal section of the drier;

Fig. 2 is a front end view of the same;

Fig. 3 is a rear end view of the same; and

a Fig. .4 is a cross section on the 'line 4-4 Fig. 1.

Like symbols of reference herein indicate like parts in each of the'figures of the drawings.

As illustrated in the drawings, my improved drier is shown at A and is comprised of the cylindrical member B and the furnace portion C, which are mounted on any suitable foundation. The furnace C extends around and incloses the cylindrical member B and such member is set at an incline therein. The furnace C is so arranged that complete combustion will be insured by any suitable means for the gasesto be generated by such furnace, and a relief stack I) having a damper b is provided on the top of the furnace in order to carry the hot gases from the furnace to the atmosphere in case ratus. The cylindrical member B comprises the outer shell 1 and the flue or inner shell 2, which are separated from each bther to form the chamber or space 3 between the same. The flue2 is supported by the nozzles hereinafter described and by the arms 4 connected to such shells and secured by the angles 4, with such arms being loosely mounted in the angles 4 to allow for unequal expansion in the shells 1 and 2. These shells 1 and 2 are adapted to be rotated together within the furnace C by means of any suitable mechanism 5, which is supported on a base a at the rear end of the member B and beyond the furnace C, such as by the suitable gearing 6 connecting with a gear wheel 7 around the outer shell 1 operated by any suitable source of power. The base a and the base a at the front end of the member B beyond the furnace C also supports suitable bearing wheels 8, which engage with bearing rings 9 surrounding the outer shell 1.

Fitting over the supporting-arms 4 are I the flights 10 and 11, the flights 10 being secured at one end to angles 10 on the interior of the outer shell 1 and extending into the space 3, and the flights 11 being secured at one end to the angles-11 on the exterior of the shell 2 andextending into said space. The flights 10 may also be bent upwardly at their inner free ends to form the shelf por tion 12 thereon.

\Vithin the furnace C and connected between the outer shell -1 and the flue or inner shell 2 are a series of nozzles 18 whichact as ducts between the exterior of the shell 1 and the interior of the flue 2 for the passage {of the gases from said furnace into said Mounted on top of the furnace C is the exhaust fan 14, which has the exhaust flue 15 connected to the same and t0 the head 18 at the front end of the cylinder B opposite the flue or inner shell 2. An exhaust flue lti'is also connected toa fan 17 located on top of said furnace and such flue 16 leads through a head 18 at the front end of the member B and into the chamber 19. A hopper 18 leads into the chamber 19 through the head'18 and within the outer shell 1, and within such chamber are the helical flights 20 for carrying the material to be dried from the bottom of such cham-' her into the chamber 3, as the material is fed into the chamber 19 by the said hopper. The inner shell 2 has a contracted portion end of the outer shell 1 and is 2' at its front end for fittin within a tubular portion 18 on the hea 18 and the exhaust flue 15 opens into said portion 2' and is secured to the portion 18 through a belt and flange connection 15 between these parts. An asbestos plate 15" is secured between the connection 15' and portion 18" and bears against the contracted portion 2' to prevent the passage of any gases between said stationary portion 18" and the rotating portion 2'. 7

At the rear end of the member B is the discharge head 21, which is connected to the with a discharge opening 22 in t 1e same. This opening is provided with a discharge casting 23 therein having a series of chutes 24 formed in the same and which communicate with the lower'ends of the buckets 25 formed on said head, so that the material is discharged through one of said chutes with the rotation of the member B by the material being carried up by such buckets from the bottom of the cooling chamber 26 formed at the rear end of such shell 1 beyond the shell 2 and thus allow the material to slide down by gravity from one of said buckets through one of the chutes when such bucket and chute reach a substantially vertical position. The chutes 24 may will pass therefrom around the'outer shell,

at the front or feed end, and thensuch gases will follow along. such shell toward and near the discharge end of the member B, thence such ases will pass through the nozzles 13 and t e" inner flue orshell 2 and thence will be drawn out by the fan 14 through the flue 15.- The material to be dried will be fed into the chamber 19 through the ho per- 18 where it will be carried-by the he ical flights 20 and into the chamber 3. With the rotation of the shells '1 and 2 of member B by the mechanism 5,

the flights 10 .on the shell 1 will lift the material, so that it falls on the-flights 11 on the flue, or shell 2 where such material will be retained until the rotation of themember B allows it to fall to the bottom of the shell 1, and by reason of the inclination of the shells the material will progress along the same from the front or feed end .to the discharge end, and it will cascade as the member B revolves, while the outer flights will continue lifting u the material from the bottom of the chem r 3 to allow rovided being dried.

4 release a a an onto the flights 11 and shell 2' and thus continue to cascade the material and dry the same. 7

When the material reaches the cooling chamber 26 at the rear end of the shell 1, the said material will continue to cascade by the flights 10 and such material will glve up its heat, so that the same can be used to assist in dryin the other material passing through the c amber 3, while the air as drawn through the chutes 24 in the discharge end casting by the fan 17 through the chamber 3 and flue 16 will be heated by the dried material and will pass through said drying chamber, there givin up heat. and carrying. away evaporated moisture from the drying material through such fan. It will be obvious that other means can be used for carrying away the exhaust gases from the inner shell and the evaporated moisture from the drying material in the drying chamber, instead of twb fans, as shown and described, while various other modifications and changes in the design and construction of my improved drier may be resorted to, without departing from thespirit of the invention, or sacrificing any of its advanta es.. It will'thus e seen that the arrangement of the drier will give the ideal application .of heat tothe material to be dried and all posslble heat extracted from the gases and dried material. The apparatus gives the maximum heating surface and capacity for floor space and there is no possibility of the furnace gases mixing with the material What I claim as my invention and desire to secure by Letters Patent is: a

1. A drier comprising a rotatable d havin an inner shell and an outer shell PI'OVI ed w1th a space between thesame, means for-feeding the material to be dried into the front end of said spaced portion,

for the material on the rear end of the outer means within spaced portion for catch- 'mgand depositing the material on the exterior of the inner shell, a discharge head shell; means for generating hot gases, means inclo'sing said 'drumfor lacin the gases around the said outer she an means for drawmg such gases from around said outer shell and into and through said inner shell for heating the material between said shells.

2. A drier comprising a rotatable drum having an inner shell and an outer shell provl ed with .a space between the same, means for feedlng t e material to be dried into the front end of said spaced portion, means within said spaced portion for catchmg and depositing the material on the exterior of said inner shell, a discharge head for the material on the rear end of said outer shell, means for generating hot gases, means inclosing said drum for placing the gases around said outer shell, means between said shells for passing the gases from around the outer shell and into the inner shell, and means for drawing such gases from around said outer shell and into and through the inner shell to exhaust such gases and for heating the material between said shells.

'3. A drier comprising a rotatable .drum having an inner shell and an outer shell provided with a space between the same, means for feeding the material to be dried into the front end of said spaced portion, means within said spaced portion for catching and depositing the material on the exterior of said inner shell, a discharge head for the material on the rear end of said outer shell, means for generating hot gases, means inclosing said drum for placing the gases around said outer shell, nozzles at the rear end of said inner shell for passing the gases from around said outer shell and into said inner shell, and means for drawing such gases from around said outer shell and into and through said inner shell to its front end'to exhaust such gases and for heating the material between said shells.

4. A drier comprising a rotatable drum having an inner shell and an outer shell prosaid inner shell, a discharge head for thevided with a space between the same, means for feeding the material into the front end of said spaced portion, means within said spaced portion for catching and depositing said material on the exterior of said inner shell, a discharge head for the material on the rear end of said outer shell, and a chamber. for cooling the dried material before being discharged through said head.

5. A drier comprising a rotatable drum havin an inner shell and an outer shell provi ed with a space between the same, means for feeding the material into the front end of said spaced portion, means within said spaced portion for catching and de' ositing said material on the exterior of material on the rear end of said outer shell, and a cooling chamber at the rear end of said drum for the dried material before being discharged throu h said head.

6. A drier comprising a rotatable drum having an inner shell and an outer shell provided with a space between the same, means for feeding the material into the front end forming an inner shell and an outer shell 7 provided with a space between the same, means for feeding the material into the frontend of said spaced portion, means in said spaced portion for catching and depositing said material on the exterior of said inner shell, means for applying the heat from the gases around said outer shell and to the wet material at the front end of said drum, and means for again applying said gases to the wet material on said inner shell before exhausting said gases.

8. The herein described process of drying powdered or other material consisting in applying the heat from the gases to the wet material in the drier and at the. feeding end of the same, and then again applying the heat from the gases to the wet material in the drier before such gases are exhausted and after they are passed through the drier. In testimony whereof I, the said LINDSAY R. Onms'rm, have hereunto set my hand.

LINDSAY R. CHRISTIE.

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