US1882178A - Paper pulp separator - Google Patents

Description

Oct. 11, 1932.

G. A. CUMB;ERLAND PAPER PULP S-QPARATOR Original Filed Jan. 6, 1951 5 Sheets-Sheet Inventor Q a? Cqmier/Qfiaf A tlomey Oct. 11, 1932. e. A. CUMBERLAND 1,882,178

PAPER PULP SEPARAIOR Original Filed Jan. 6, 1951 3 Sheets-Sheet 2 Q I M In venior A llpmcy Oct. 11, G CUMBERLAND PAPER PULP SEPARATOR Original Filed Jan. 6, 1931 3 sheets sheet 3 Inu'enior v7 Cam Zer/and A llorney l atentecl Get. 11, 1932 Bhutan stares nsane r were 1 GEORGE A. CUMBERLAND, or WISCONSIN nnrins, WISCONSIN, Assrenon or ennronnrn .ro MARVIN s. nine, or WISCGNSIN narins wisconsin rerun rune SEPARATOR Application filed January 6, 1931, Serial No. 507,004. Renewed August 29, 1932.

This invention relates to an improved pulp separator such as is particularly adapted for use in paper manufacturing plants, and it hasparticular reference to an improved proc- 5 ess and means for conditioning pulp products, where the process requires the extraction of water so as to modify or change the consistency of the pulp.

I am aware of the fact that the separa- 10 tion of water from the relatively thick pulp product through the use of mechanical separators and machinery is not broadly new; As a matter of fact, it is common practice to utilize what is known as a pulp decker for the purpose. a Y It is a matter of common knowledge therefore that it is general or universal practice in the storage of pulp to extract the major proportions of water and to subsequently add water tothe extracted pulp at the time the latter is ready to be put on the screen for the. manufacturing of paper. [his method has been adapted in order to economize on the.

storage of relatively thick pulp products.

As a general rule, the present form of deckers now in substantially universal use; have an open-ended cylinder located for rotation in an appropriate hopper or vat. It is customary to mount the cylinder on a solid is of a laminated porous type and allows the water to pass through said surface and to be discharged through the open ends of the cyl inder. This separation of water causes the pulp to adhere to the somewhat adhesive surface of the cylinder after which it is picked 'up by the couchroll. It is then doctored off. for storage purposes. r

In this operation; there is a so called declrle strap, either of rubber or felt, which serves to close off the open end of the cylinder from the. liquid in the vat. Unfortunately however,.these straps are subject to' disarrangement and breakage and are frequently out of order, thus allowing the liquid in the vat, which contains pulp, to escape into the effluent water. i

The concensus of opinion is that these old types of deckers are continuously getting out of adjustment, so that the strap must be rea which causes additional rep I for accomplishing the resultvin amore experotating shaft. The surface of the cylinder .Inunicates with the intake compartment 12.

placed from timeto time. This meansa stoppage in the operation of the decker. Moreover, because of the construction of the present-day deckers, the stress is not'uniform and the cylinders and straps get out of alinement irs and frequent rebuilding of the cylinder surface.

With the foregoing objections and defects in mind, I have evolved and produced an improved and seemingly more efficient structure ditious, practical, and economical manner.

The specific structural organization'constituting the novelty of this improved contribution to the art will become more readily ap- '65 parent from, the following description and drawings.

In the drawings:

Figure 1 is a top plan view of an improved decker developed and constructed in accord ance with the present inventive conception.

Figure 2 is a longitudinal vertical sectional view on the line 22 of Figure 1.

Figure 3 is a transverse vertical section on the line 33 of Figurel. I I g V Figure 4 is a transverse section through the improved cylinder.

Figure 5 is a fragmentary sectional view thereof. v I g V V p In the drawings, the vat orcontainer in .80 general is denoted, as a whole, by the numeral 6.- This is generally in the, form of an open-top rectangular container. In accordance with the present invention, the opposite ends are provided with fixtures of ap propriate design carrying suitable packing glands 7. Beyond these packing glands and on the exterior of" the vatare standards 8 whose upper end portions are provided with upper and lower bearings 9 and 10 respectively.

As seen in Figure 3, the numeral 11 designates the pulp feed or inflow pipe which com- This compartment defined by a partition 13 whose lower end '14 is of curvate inturned configuration. Opposite tothe partition 13 is a similar longitudinal partition 15 which simultaneously defines the efiiuentor exhaust box or compartment l6and a central separating chamber 17.

The cylinder is generally designated by the numeral 18, the couch roll by the numeral 19 and the scraping blade by the numeral 20.

This blade functions as a chute. for delivering the pulp by gravity into the box 16. The

-. pulp is carried away through the conduit 21 whose enclosed surface is'formed with a Il'llil1.

.or cylinder are closed."

to the point of storage (not shown). I

As seen in Figures 4: and'5, the rotary cylinder comprises a tubular shaft or' hub 22 tiplicity of ports or perforations 23. The rim or surface of the cylinder is of open-work grid-like formation and includes circumferentially spaced longitudinal rods 24: connected to the interposed radial spokes 25, said spokes being mounted through the medium of collars 26' on the'shaft. I

Around the rod 2 1 are inner and outer "The end portions 30 of the shaft however ings 9'; In fact, the extremities 31 are flared I and empty into open-top traps or-recep'taclcs meral 34 designates the propulsion gear for p the cylinder 18, this being mounted on the" I, '30, constitute journals which extend through the stufling boxes and are mounted in the bear- 32 at opposite ends of the structure.

The water conducting pipes leading from these trapsare denoted by the'numerals 33 and these pipes lead to suitablepoints of deposit. Any suitable source of power is utilized for simultaneously rotating the cylinder and couch rolls 18 and 19 respectively.

As shown inFigure 2 for example, the nua'd'jacent journal30. In constant mesh with this isa'pinion 35 mounted on theadjacent end of the shaft for the couch roll 19, thus rotating these parts 18 and19 in opposite dicyllnder. V

ductory pipe 11 and gravitates into the intake of rotation of the cylinder, the partition 13 Y compartment 12. It flows from this compart--' ment 12 into the chamber 17 where it IS act on the incoming mass of material in an eflicient manner due to the fact that the-influx enters the vat at right angles to the axis acting as ab'affle to cause indirect separation the water.

and to facilitate moreieflicient drainage' of In practice, the inflow of pulp laden ma-' terial is supplied in. the customary source) I and enters the vat. 6 by way of the intro Figuratively, and broadly, the separating drum with its hollow' central shaft forms a sort of a sluiceway for discharging the water intothe collecting traps 32 at the opposite ends of the vat. It is understood, of

course, that the entering fluid is of the customary fluidity.

V I It is further evident that the water passes through the porous surface of the drum and 'accumulateswithin the interior of the drum, being "trapped by the imperforate head 29. 'The rotation of the drum however causes the water to pass through the perforations. in the hollow shaft 22'and this efliuent fluid is discharged through the open ends ofthe shafts into the traps and carriedaway by Simultaneously the pulp adheringto the 'reticular surface of the drum is picked up by the couch roll and carried around and scraped off by the blade 20 and dumped into the compartment 16. It is then carried away byr the conduit 21 to theplace of storage (not shown). I r 1 It will be observed that the cylinder is sealed by imperforate heads at both ends so as to, prevent any of thepulp, except such as passes through the fine reticular spacing or covering of the cylinder, for mixing with the extractedwater which accumulates-in-"- isidecfthe d rum.-' The drum is ofcourse partially submergediin the materialjto be conditioned or treated and when rotated at a predetermined'speed, causes the relatively thick pulp to be delivered at varying degrees of density as -desired, while the extracted water is conducted out through the hollowcentralshaft at both or either ends,

asthe case maybe.

Particularly do I wish to emphasize a system of this kind wherein the inflow of pulp laden liquid isvintroduced into the vat at right angles to the axis of rotation of the cylinder, thereby permitting improved drainage of the water into the cylinder, and con *sequently, maximum deposit of 'pulp on the rections and permitting the couch roll tof pick up the pulp deposit on thesurface of the surface of the cylinder, atapoint particulartherefromthrough the perforated shaft out as much pulp is carried off by the center portionof the cylinderas is carried oftby the end portions thereof. Consequently this is a separating drum with a screening and sep-' through the ends of the Vat and a'ccumuarating surface of appropriate gauge, and the imperforate ends together with the perforated shaft is a predominating factor of novelty in this improved organization of parts.

It is thought that the description taken in connection with the drawings will enable a clear understanding of the invention to be had. Therefore, a more lengthy description is thought unnecessary. While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

I claim:

1. In a structural assembly of the class described, in combination, an open-top vat, means for delivering the pulp-laden fluid to said vat, a rotary cylinder in said vat, said cylinder having a reticular peripheral surface and closed end, a supporting shaft for said cylinder journalled for rotation in suitablebearings, said shaft being perforated and of hollow form, whereby to discharge the separated water through the ends of the shaft uprights at the ends of the vat, bearings therein for the ends of the shafts, and receptacles located to the outer sides of the uprights'into which the ends of the shaft extend whereby said receptacles will receive the discharge from the shaft.

2. In a structure of the class described, in combination, an open-top vat provided at opposite ends with stuffing boxes, a tubular shaft mounted for rotation in said stufling boxes and having its opposite ends extending outwardly beyond the stufling boxes, said opposite ends being open, that portion of the tubular shaft within the vat being perforated, a separating drum mounted on said shaft and having imperforate heads and a reticular and adhesive surface, means for delivering the pulp-laden fluid into the vat and means for conveying the extracted pulp from the vat, comprising a couch roll and a scraping blade, together with a pulp deposit box built in said vat, and a driving gear car ried by said shaft and a pinion in mesh therewith for operating said couch roll whereby to cause the cylinder and couch roll to operate in unison in opposite directions.

In testimony whereof I aflix my signature.

GEORGE A. CUMBERLAND.

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