US1385340A - Strainer-cylinder for wood-pulp and cellulose - Google Patents

Description

H. E. WAGNER.

STRAINER cvLlNDER Fon wool) PULP AND CELLULJSE.

APPLICATION FILED AUG.9.1920.

1,385,340. Piltlld July 19, 1921.

2 SHEETS-SHEET I.

I/zyf *I l l R. E. WAGNER.

STR/UNER CYUNDER F011 Woon PULP AND CELLULOSE.

APPLICATION FILED AUG.9| i920.

1,335,340, .Patented July 19,1921.

2 SHEETS-SHEET 21 UNITED STATES PATENT OFFICE.

' RUDOLF ERNST WAGNER, OF KARLSTAD, SWEDEN, ASSIGNOR T AKTIEBOLAGET KARLSTADS HEKANISKA. VERKSIADS, OF KARLSTAD, SWEDEN, A MANUFAC- TUBING COPANY F SWEDEN'.

BTBAINERfC'YLINDER FOR WOOD-PULP AND CELLULOSE.

To all whom it may concern.'

Be it known that I, RUDOLF ERNST WAG- Nsu, a subject of the Kin of Sweden, residing at Karlstad,.in the Kingdom of Sweden, have invented anew and useful Improve ment in Strainer-Cylinders for Wood-Pulp and Cellulose, for which I have filed applications in Sweden, March 5,1919, #1049/19; Finland, June 21, 1920, #397/20; Norway, June 22, 1920, #20,647 Germany, June 24, 1920; Austria, June 24, 1920, and of which the lfollowing is a specification.

The present invention relates to an improvement in strainer cylinders or rolls for wood-pulp and cellulose, such. as are used in the rotary wire-part of wet-machines, in pulp-vate, thickeners for pulp, water-extractors, and collectors for stuff. The invention relates to thetype of such straining cylinders which consist of a rotary cylinder divided into cells or compartments and surrounded by a rotary strainer cloth, andv which are arranged in such manner that the supply of the material orr pulp onto the strainer cloth takes lace at a ortion i its upward moving su ace over t e horizontal plane through the axis of the cylinder.

The 'invention'is princi ally characterized by this that in the interlor ofV the cylinder within the cells a stationary suction box is provided which boxl is arranged in such manner that during the rotation of the cy1inder those cells over which the pul is suppliedA onto the strainer cloth, are at rst shut off from the'suction box, and only after a filter or straining layer has been formed over these cells by natural strainin said cells are ut into communication `wit the suction ox owing to the rotation of the cylinder. The suction chamber is preferably arran' ed in such manner that the said cells over which the pulp is Supplied onto the strainer cloth, are at rst completely closed by the wall of the suction box,v and are afterward moved duringl the rotation of the cylinder to an Specification of Letters Patent.

Patented July 1e, raar.

Application led August 9, 1920. Serial No. 402,376.

The cyl- 6 dividingI the interior of' the box into two chambers. tion chamber, and has at lts top an opening -of such extension that the uppermost cells in the upper fourth moving upward and the reater portion of the number of cells in t e upper downward moving fourth of the cylinder, approximately to the point on the periphery of the cylinder at which the web of pulp gathered on the strainer cloth around the cylinder is removed from the cylinder in suitable manner for instance by means of a removing roll or by blast air, are in communication with said suction chamber. The smaller chamber 8 is provided at its top with an opening 9, as shown in Fig. 2.* The said opening is located in such manner that the cells arrive opposite the same only after they have moved a certain distance upward in the pulp in the pulp container 1. During the first period of movement upward through the pulp the cells are thus closed and separated from the chamber 8 by the Wall 10 of said chamber. The shaft 11 of the cylinder is supported by bearing frames 12 which also support the ulp container 1. The suction box 5 is ournaled 4on the shaft 11 and is maintained 1n position by means of the bolts 13. The cylinder is rotated by means of a worm gearing 14.

When during the rotation of the cylinder the vcells enter the lower portion of the pulp container ,1, the pulp settles on the strainer cloth 4 over the cells, and the water strains through the strainer cloth into the cells and remains in the cells. In this manner the fibers of the pul are at first steadily and slowly deposlte on the strainer cloth. When' the cells have been moved u ward opposite the o ening A9 of the cham r 8, the water flows rom the cells into sald chamber, whereby morev water filters through the strainer cloth onto which more pulp becomes deposited. In this manner there has now lbeen formada fiber layer ora filter of ber The larger chamber 7 is the sucon the-strainer cloth, so that-When after- Ward the 'cells arrive in front of the opening of the suction chamber 7 and are thus subjected to the suction said fiber layer serves aS a filterA for collecting still more pulp fibers. A

The cells thus being separated by the Wall 10 from the drain or outlet chamber 8, when entering the pulp container, and there being no outlet from the cells, the straining or filteringI through of the Water will at iirst be checked and take place very. slowly, and the risk of'the fibers being brought `along by the Water will thus be very small.

When a liber layer has been formed outside f the cells these will arrive to. the outlet 9',

` box located in the interior of said cylinder .the pu struction is attained so that the width of the entire machine does not become greater than the length of the cylinder.

The water is drained from the suction chamber 7 through a pipe 15 and the water in the chamber 8 is drained through a tube 16.

I claim: e

1. In a strainer cylinder for Woodpulp and cellulose, the combination of a pulp con tainer, a rotary'cylinderdivided into cells, a strainer cloth surrounding said cells and forming the outer surface of said cylinder, an upward rotating portion of said strainer cloth above the horizontal plane through the axis of said cylinder forming one wall of said pulp container, a stationary suction within said cells' and having a suction opening opposite the upperpart of said portion of the strainer cloth forming a wall of said container, and a wallopposite the lower part o'ffsaid portion of the strainer cloth, said iwall `@forming a stationary bottom forthe cells covered by said part, for the purpose that during the rotation of the cylinder the cells moving into the pulp container shall at first be closed and shut off from the suction box and afterward vplaced into communication with said suction box when a filter Alayer has been formed on the strainer cloth over said cells by natural straining.

2. In a strainer cylinder for Wood-pulp and cellulose, the combinati-on of a pulp conn tainer, a rotary cylinder divided into cells, a strainercloth surrounding said cells and forming the outer surface of said cylinder, an upward rotatin portieri oi said strainer cloth above the horizontal plane through the axis of said cylinder forming one Wall of said` pulp container, a Wall opposite the lower part of said portion of the strainer cloth, said wall forming a stationary bottoni for thecells covered by said part, a drain conduit opposite an intermediate part of said portion of the strainer cloth, and a stationary suction box located in the interior of said cylinder Within said cells and having a suction openin opposite the upper part of said portion o the strainer clot 1.

3. In a strainer cylinder for wood-pulp and cellulose, the lcombination of a pulp container, a rotary cylinder divided into cells, a strainer cloth surrounding said -cells and forming the outer surface of said cylinder, an upward rotating portion of said strainer cloth above the hormontal plane through the axis of said cylinder forming one wall of said pulp container, a stationary suction box located in the interior of said cylinder Within said cells, the Wall of said suction box lforming a stationary bottom for the cells ,covered by the lower part of said portion of the strainer cloth forming a wall of said container, a partition in said suction box dividing the saine into two chambers, one ofsaid chambers having an opening opposite the cells covered by the intermediate part of said portion of the strainer cloth, a drain conduit connected to said chamber, the other chamber having an opening opposite the cells covered by the upper part ofsaid portion of the strainer cloth, and means for producing suction in said second chamber.

p RUDLF ERNST WAGNER.

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