US651546A - Plate for filter-presses. - Google Patents

Description

No. 65|,546. Patented lune I2, |900.

J. H. HINKEN &..J. E. TURNEY.

PLATE FOR FILTER PRESSES.

(Application led July 21, 1899.)

(No Model.)

UNITED Sbrrflrn.r r`PATENT Ormes.

JOHN II. HINKEN, OF LOUISVILLE, KENTUCKY, AND JOHN E. TURNEY, OF

OAK PARK, ILLINOIS, ASSIGNORSl TO THE J. E. TURNEY DRYING MA- CHINERY COMPANY, OF CHICAGO, ILLINOIS.

PLATE FOR FILTER-PRESSES.

srnciricn'rolv forming part of Letters Patent No. 651,546, dated une 12, 19o.

Application filed July 21, 1899. Serial No. 724,618. (No model.)

To all whom, t may concern: head-plate B at one end are provided each 5o Be it known that we, JOHN H. HINKEN, a with an induction-aperture l, preferably at citizen of the United States, residing at Louisthe center, though this is am atter of convenville, county of Jefferson, and State of Kenience or symmetry rather than of necessity, as tucky, and JOHN E. TU RNEY a subject of the respects the function or operation of the press.

Queen of Great Britain,resid ing at Oak Park, All the plates A A A and B B' ride on the 55 county of Cook, and State of Illinois, have inrods G G of the press-frame, said rods being vented certain new and useful Improvements supported at opposite ends on the posts D D in Plates for Filter-Presses, which are fully D D. When suspended on the rods, the sev- Io set forth in the following specification, refereral filter-plates are conaxial, the inductionence being had to the'laccompanying drawapertures being in line, and the rear end 6o ings, forming a part thereof. plate B is provided with a swiveled stem E,

This invention relates to the class of presses which is screw-threaded at its exposed or prowhich are used to separate solid from liquid truding portion and screwed through a crossmatter by process of filtering under pressure; head D, which secures the posts D D at that and it consistsin improvements in the strucend, said swiveled and threaded stem having ture of the plates used in such presses to afan operating-handle E, by which it may be ford backing for the filtering or straining elescrewed back and forth through the crossment and in the combination therewith of cer` head to close or open up the press. The inzo tain features, as set out in the claims. duction-head B is stopped in any suitable In the drawings, Figure lis an axial secmanner, so that the entire assemblage of 7o tion ofaiilter-presshavingourimprovements. plates may be closed up upon the rings H, Fig. 2 is a section at the line 2 2 on Fig. l, which are interposed between them and conshowing in elevation one of the filter-plates, stitute the walls of the cells which are formed z 5 the filtering fabric and woven-wire cloth or between the plates.

screen Y which backs it, each partly being J is the clearing-blade, formed asa continu- 75 broken away to disclose the structure underation of its shaft J and extending in through neath. Fig. 3 is a4 detail section, full size, the induction-pipe K and through the inducthrough a filtering-plate of our improved contion-apertu res of the several plates, the struc- 3o struction at the line 3 3 on Fig. 2. Fig. 4 is ture in this respect and the mode of operaa similar full-size detail section at the line `tion being that shown in said Patent No. 8o 4 4 on Fig. 2. 607,929.

The general arrangement of the parts in, The features constituting our present inour improved press is similar to that shown vention relate to the construction of the 35 in patent to John H. Hinken, No. 607,929, plates and their surface-coverings,whichwill dated July 26, 1898; but the detail structurel now be described. Said plates being formed, is different from that shown in said patent, as already mentioned, of wood, have vertical as will be indicated by the following descripgrooves 3 3, &c., on their faces constituting tion. the walls of the cells, the interior plates 4o Both the filtering-plates A A A and the end- A A A therefore being grooved on both facesl plates B and B are made of wood, preferably and the end plates on the inner faces only. 9o built up of narrow strips glued together edge These lter-grooves are in cross-section about to edge and additionally secured, so as to three-sixteenths of aninch wide and deep form substantially-integral planks, by means and separated by intervals about equal to 45 of bolt-rods C C C, giro., extended through 'their width. At their lower ends they lead each plate from edge to edge, said strips be-l into a drainage-channel 4, which follows the ing also suitably doweled together at their lower edge of the plate, extending, therefore, abutting edges, as shown, by the dowel-pins around about half the circumference of the 'a a. The intermediate plates A A A and the cell at the lower side. Around the'uinductionapertures there is necessarily left standing of each interior surface of the filter-plates an ungrooved portion 5, the filter-grooves 'being constructed by the same, since otherwise the unfiltered material entering through the induction-apertures would obtain direct access into the filter-grooves. This circumstance, in the absence of provision to the contrary, would prevent the drainage of the upper portion of such of the filter-grooves as are thus obstructed; and to prevent this we form a transverse drainage-channel 6 a little above the ungrooved annular central portion 5, said transverse drainage-channel having length greater than the diameter of said ungrooved center and extending beyond it at both sides, so that the filter-grooves crossed byit are thereby drained laterally into other filter-grooves which are not obstructed by the central portion 5. It will be manifest that the liquid forced through the filtering fabric into the filter-grooves equally at all points of the surface, if it were sufficient in quantity to require the entire capacity of the filter-groove to receive it, could not be carried off by these same filter-grooves, because the supply at the lower portion of each groove would use the full capacity of the groove, and that which would be forced into the groove at the upper portion would find no escape until that in the lower portion had been drained off. This would result in unequal filtering of the material, the lower` portion of each cell becoming filled with solid residuum, while the upper portion was still occupied with unfiltered liquid. To prevent this undesired result, we provide drainagechannels 7 7, extending obliquely across the filter-grooves, diverging from a point near the upper edge of the cell toward opposite sides, so that the upper portion of all the grooves thus crossed may be drained directly through this channel, down to the lower part, avoiding the necessity of passing the liquid from such upper portion of each filter-groove down through the same groove to the final drainage-channel, and to the same end we provide another pair of oblique drainagechannels S S, preferably connecting with the lower ends of the channels 7 7, respectively, and converging from opposite sides toward the lower edge of the cell. These lower converging drainage-channels take the liquid not only from the upper gliverging channels 7 7, but also from the portion of the filtergrooves which extends up and down between the channels 7 and the channels 8, thus almost entirely relieving the portion of the filter-grooves below the converging channels 8 8 of the duty of conducting away the liquid from the upper portion of the same. It will be understood that from any suitable pointpreferably the lowest point-in the final drainage-channel 4 a suitable outlet-duct leads through the edge of each plate, as illustrated at D 9, dac., such outlet being provided with a discharge-spout l0.

One of the difficulties which greatly limits the filtering capacity of a press of this character arises from the manifest fact that the filtering, practically or very nearly, is confined to the portion of the area of the filterc'loth which overlies the grooves a-nd chan-v nels, because the cloth, being forced onto the surface of the plate by the pressure which is to effect the filtering, there is no escape for the liquid back of the fabric, except when the surface of the plate is recessed for that purpose. The same circumstance causes the strain upon the filtering fabric at the edges `of the grooves to be very great and causes great liability to parting the threads at these edges, so that even when the fabric does not `break apertures are opened between the threads large enough to admit solid material and prevent proper filtration. The lastmen tioned difficulty is largely overcome by the construction described in said Patent No. 607,929, involving the application ofthe fabric biaswise with respect to the filter-grooves; but the first defect-limitation of the available filtering area of the fabric to the area of the grooves and channels-still remains in lthat structure.

By our present improvements we largely overcome the defect in respect to limiting the filtering area, and at the same time we overcome the other defect mentioned in a different manner from that described in said former patent. For these purposes we apply upon the surface of the filtering-plates over the grooves or channels open-meshed woven-wire fabric or screen L, such fabric of haif-incl1square mesh being found quite effective and satisfactory in use, the same being laid on biaswise with respect to the filter-grooves-that is, so thatboth Wires of the screen lie obliquely across the filter-grooves- Over this weven-wire fabric or screen the filtercloth M, of customary web and character, is applied, and may be laid without regard to direction of its threads. The woven-.wire backingL terminates inside the cell-wall and is secured by suitable tacks to the wood at as many points as found necessary; but the filtering fabric extends beyond the cell-wall and may be secured outside the same by suitable tacks or nails driven into the wooden plates in the margin which is left outside the cell-walls and made ample for this purpose. The cylindrical cell-walls H are stepped at their edges on the surface of the fabric,which is thus securely held and also serves when the cells are closed up to pack the joint. By reference to Fig. 3 it will be seen that the crossing of the wires of the screen L leaves adjacent each wire, between the crossing-wire and the adjacent surface of the plate, a clear space or crevice l1, and that even though the filtering fabric M should be sunken into the half-inch-square mesh of the screen it cannot close this crevice l1, and that there is thereby .IOO

IIO

produced a network of these crevices or filamentary channels alongside the wires in each direction entending over the whole surface of the supporting-plate, so that even without any filtering-grooves quite alarge area of the filtering fabric M would be exposed over these spaces instead of being pressed tightly onto the backing-plate, and that therefore quite a large measure of filtration would occur without any grooves in the plate, and the filtered liquid would find escape downward through this network of crevices. When such screen is applied over the grooved plate, of course the area of cloth exposed is very greatly increased and the circulation or drainage of the liquid behind the cloth is very much more free than if the screen were applied merely upon an ungrooved plate or if the cloth were applied directly upon a grooved plate. It will be manifest that the screenwires giving both threads of the fabric support at intervals of half an inch overcomes the difliculty and defect arising from the application of the filtering fabric upon the grooved plate with its threads one Way extending in the same direction as the grooves and that while there is some additional advantage of this nature obtained by applying the cloth biaswise with respect to the screen-wires it is not essential that it should be so applied. In.

the screen, and when thus placed the filtering fabric M may be applied so that its threads will be oblique not only to the wires of the screen, but to the grooves and channels of the plate. Theoretically such oblique arrangement of all the elements is the best; but practically there is no absolute necessity for carrying the principle to this extreme, and we do not limit ourselves strictly in this respect.

We claim- 1. In a filter-press, a filter-plate having upand-down filtergrooves,a final drainage-channel into which they lead at their lower ends, and oblique drainage-channels crossing Jthe grooves diverging downward from near the upper edge toward the opposite sides.

2. In a filter-press, a filter-plate having upand-down iilter-grooves,a final drainage-chan# nel into which they lead at their lower ends, and oblique drainage-channels crossing the grooves and converging downward from opposite sides toward the lower edge.

3. In a filter-press, a filter-plate having up and-down filter-grooves, a final drainage-channel into which they lead at their lower ends, oblique drainage channels crossing the grooves diverging downward from near the upper edge toward the opposite sides, and oblique drainage-channels crossing the grooves and converging downward from opposite sides toward the lower edge.

4. In a filter-press, a filter-plate having upand-down filter-grooves, and a final drainagechannel into which they lead at their lower ends, and having an inductiomaperture, and an ungrooved annular portion about the same,

and a transverse drainage-channel crossing the grooves above the entire width of the ungrooved annular part and extending laterally beyond the same in both directions, whereby the liquid filtered into the up and down grooves finds the way past the ungrooved ana nular part toward the final drainage-channel.

5. In a lter-press, a Jlter-plate having filter-grooves in its surface, and an open-meshed wire cloth or screen applied on such surface with the wires both ways oblique-to the filtergrooves, and filtering fabric applied outside the screen with its threads both ways oblique to the wires of the screen.

6. In a lter-press, a filter-plate having filter-grooves in its su rface,and an open-meshed wire cloth or screen applied on such surface with the wires both ways oblique'to the filtergrooves, and filtering fabric applied outside the screen with its threads both ways oblique both to the filter-grooves and to the wires of the screen.

In testimony whereof we have hereunto set our hands, at Louisville, Kentucky, this 15th day-.of July, 1899.

JOHN II. KINKEN. JOI-IN E. TURNEY.

In presence of O'rro A. ROTHERT, GEO. DEUTSCH.

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