DE1627847A1 - Press thickener - Google Patents

Description

Press-T thickener

The present invention relates to thickening devices for sludge and the like, and particularly relates to one having a plunger working device.

Thickening devices of this type are already known. With them, a plunger leads back and forth movements against a Counter-pressure device, e.g. a thickener cone. In most known devices, the pressed material is with the help of Plunger pushed out after the counter-pressure member aside or was carried past the material. Such a device normally compresses in a non-enclosed space, by pressing the material against the thickener cone and during of the actual pressing process pushed out past its base will. This creates channel formation with uneven compression of the material, so that the dry content does not become uniform across the material pushed out. Such a device is therefore unsatisfactory if the thickened material should be burned immediately.

The present invention can deliver the material with a very high dry content continuously provide an improved Prese thickener au the purpose, the cheap in operation and to purchase claimed _s and the little space.

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Di © ^ bwfeent from a press housing with feed funnel

ujid * perr © ri) eEiies |; -iiKdickungszylinder ₈ a plunger, eine® this ntgegeng3S @ * i hteten Eindickerkegel and a dispensing member

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for the thickened mud. The invention is characterized in that that the dispensing member consists of a sleeve which can be moved back and forth and in which a plurality of holes are arranged which are provided are to be filled with thickened mud around this Discharge sludge outside the thickening cylinder.

Compressed air jets are used to empty the holes in the dispensing sleeve directed radially against the sleeve immediately outside the thickening cylinder.

The invention is described below with reference to the accompanying drawings Drawings described in more detail on which

Fig. 1 is a longitudinal section through an embodiment of the Invention,

2 shows a cross section through the dispensing sleeve, 3 shows a second embodiment of the invention, and FIG. 4 shows a thickening unit with several press-thickeners zjfet.

Fig. 1 shows a horizontal press-thickener, which includes an elongated press housing 1, which has a vertical feed hopper 2 and a horizontal thickening cylinder arranged below it. 3 is provided, in the wall of which there is a large number of small holes. The thickening cylinder 3 can be removed for cleaning and replacement and is attached to a support wall 12 and a partition 13 in the press housing. At one end of the thickening cylinder a plunger 4 is arranged to be displaceable back and forth with the aid of a pressure cylinder 10, and at the opposite end of the thickening cylinder a thickener cone 5 is ^{mounted stationary on a second partition I 1} I in the press housing. At the same end of the thickening cylinder as the thickening cone

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5 'sits, there is a dispensing sleeve 6, which is a piece in the Thickening cylinder is displaceable in and out of it. In the Fig. 2 shown in more detail sleeve 6 has a plurality of closely spaced, preferably elongated, outwardly conical holes 7, the Longitudinal direction in the radial plane lies along the circumference of the sleeve. The holes 7 are preferably offset from one another in order to be effective To effect delivery of the pressed material. The one in the thickening cylinder The displaceable edge of the dispensing sleeve 6 is beveled to form a scraping edge in order to remove sludge deposits from the wall of the thickening cylinder scrape off. The is directly inside the scraper edge Dispensing sleeve 6 along its circumference with a groove for a seal provided to prevent sludge from being forced out of the thickening cylinder between it and the dispensing sleeve. These Seal groove is quickly filled with mud, which builds up into a very effective and inexpensive seal.

The inside of the thickening cylinder 3 lying base area ^ thickener cone 5 is provided with a sealing groove corresponding to that in the dispensing sleeve in order to effectively seal the space between the dispensing sleeve and the base of the thickener cone.

The base part located outside the thickening cylinder 3 of the thickener cone 5 is provided with several radially outwardly directed compressed air channels 9, the compressed air from the inside to the outside Point at the holes 7 in the dispensing sleeve 6 to blow the holes clean of any material that has been pushed out. ·

• From the partition 13 to the opposite end of the press

A collecting duct 15 for squeezed out water, etc. extends between the partition walls 13 and Ik

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emptied with the help of the aforementioned compressed air jets, after which the Material on a conveyor belt or the like running under the shaft. can be collected.

The dispensing cylinder is actuated with the aid of a pressure cylinder 11 located at the corresponding end of the press housing via a piston rod 17 controlled, and the supply of compressed air for blowing clean the holes in the dispensing sleeve is done through the tube 18 on the Partition I ^.

The press-thickener according to the present invention works in the following way: The sludge is through the funnel 2 into the thickening cylinder 3 introduced, whereupon the pressure cylinder 11 guides the dispensing sleeve 6 into its outermost position. After that, the plunger If pressed against the thickener pod 5, the in the thickening cylinder 3 located sludge is compressed. Should the amount of sludge supplied prove to be too small for effective thickening prove, 'of course the plunger can be withdrawn until further sludge was added, whereupon he presses the sludge again against the thickener cone. This cone is with two or more conicities formed to increase the thickening efficiency raise. During the pressing movement of the plunger, the holes. 7 of the dispensing sleeve 6 is filled with thickened sludge. Because of of the stepped shape of the thickener cone, the thickening is greatest at its central part.

After the plunger has reached its outermost position, the pressure cylinder 11 is caused to release the dispensing sleeve 6, the Holes 7 are filled with thickened mud, to be withdrawn. During the outward movement of the dispensing sleeve, the pressure in the Sludge, as the dispensing sleeve carries some sludge with it,

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the one closer to the base of the thickener cone Sludge is pressed in, which results in a very high concentration pressure during a certain period of time.

When the holes 7 in the dispensing sleeve 6 pass the compressed air channels on the base of the thickener cone outside the thickening cylinder, they are cleaned _{of the pushed out sludge 9} which falls down into the dispensing shaft and is carried away. ■ "

The plunger can remain in its outermost position until the dispensing cylinder is fully in its innermost position or it can be withdrawn earlier, depending on the continuity in the supply of new sludge, the dryness of the sludge, its consistency, etc.

In the embodiments of the invention shown in FIGS. 3 and H , the thickening press operates vertically, which further saves space.

Fig. 3 shows a longitudinal section through a vertical thickening press. In a vertical press housing 21, a feed funnel 22 is arranged at the upper end, which is connected to a vertical thickening cylinder 23 located below. At its upper end there is a plunger, and at its lower end there is a thickener _{cone 25 9} around which a dispensing sleeve 26 can be displaced back and forth in the thickening cylinder.

In the illustrated embodiment, the plunger 24 is stationary at ^ eovünets while from the - hopper 22 _s the Eindiefcsylinder 23 * the Eindiclcerke ^ el 25 and the Äbgab © sleeve 26 existing ÄggF®ß t © I in relation sua plunger @ wf ° un <& 'fe. Me AbgauehQlse S6 works in m®i Sfcufesa,

a compression stage during which it is simultaneously with the other moving parts moved upwards, and a filling stage, in which it is pushed into the thickening cylinder, its holes being filled with mud. The dispensing tube can of course are also first led into their filling layer, and then together with the remaining parts during the compression stage upwards move.

After the pressing process has been carried out, the whole movable part moves Unit down to its lowest position, whereupon the dispensing sleeve 26 is pulled out of the thickening cylinder and cleaned of sludge by means of compressed air, which through channels in the base area of the thickener cone is fed outside the thickening cylinder .. In another, not shown, embodiment of the invention, in which the pressing is also done vertically, the plunger and the dispensing sleeve work in a similar way to the horizontal one Press thickener.

The use of a press thickener according to FIG. 3 saves the costs for the hydraulic elements on the press piston. However, these last two embodiments are excellently suited for assembly into a thickening unit of the type shown in FIG. H , in which the feed and discharge are arranged centrally and a number of press-thickeners have been placed in a circle around the feed and discharge device. This is a compact unit with a large capacity, in which, of course, not all thickeners have to work at the same time, but one or more © can serve as a reserve.

even strei embodiments of the invention shown ixnü be so sure 'but obviously many

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Think modifications within the scope of the inventive idea, e.B. re. Drive, feed and discharge, arrangement and movement of the parts in Relationship to one another, etc.

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Claims (8)

Claims 1. Press thickener for sludge etc.j consisting of a press « housing with feed hopper and perforated thickening cylinder, plunger « a thickener cone directed in the opposite direction and a discharge element for the thickened sludge «characterized in that that the dispensing element consists of a dispensing sleeve (6) which can be moved into and out of the thickening cylinder (3) and in which several Holes (7) are arranged to be filled with thickened sludge in order to lead out the sludge outside the thickening cylinder. 2. Press thickener according to claim 1, characterized in that the holes (7) in the dispensing sleeve (6) are preferably elongated and outwardly conical, and are close to one another in the radial plane extend along the circumference. 3. Press thickener according to claims 1 and 2, thereby gekennseiehneta that the edge of the dispensing sleeve (6) arranged in the thickening cylinder (3) to form a stripping edge (8) is initially the Wall in the thickening cylinder is bevelled. 4. Press thickener according to claims 1-3, characterized in that that the holes (7) in the dispensing sleeve (6) are offset in relation to one another for more effective dispensing. 103809/0046 5. Press thickener according to claims 1-4, characterized in that that for the purpose of emptying the holes (7) in the dispensing sleeve from the discharged sludge, compressed air radially against the dispensing sleeve (6) through channels (9) on the base of the thickener cone (5) outside of the thickening cylinder 03) is fed. 6. Press thickener according to claims 1-5, characterized in that the press housing (1) is arranged horizontally, and the press piston ( ¹ O and the dispensing sleeve (6) in the thickening cylinder (3) with the aid of pressure cylinders (10, 11 ) are horizontally displaceable, with the supply of sludge taking place vertically. 7. Press thickener according to claims 1- ¹ J, characterized in that the press housing (21) is vertical, and the feed hopper (22), thickening cylinder (23), thickening cone (25) and delivery cylinder (26) together to and vcn a stationary plunger (24), wherein the dispensing cylinder is provided, in addition, to perform a movement, the dispensing movement, in relation to the other movable organs. 8. Press thickener according to claims 1-4, characterized in that that the press housing is arranged vertically, and the press piston as well as the suction sleeve in the thickening cylinder with the help of Pressure cylinders are vertically displaceable, the supply of sludge vertically through a feed funnel arranged around the press piston happens.