EP1786565A1 - Self-dumping separator with a disc stack - Google Patents

Abstract

The invention relates to a vertical axis self-dumping separator provided with a drum (1) in which a disk stack (3) consisting of several discs (4) is arranged, wherein a product to be centrifuged is introducible through a supply pipe (6) and a distributor (7) in a centrifugal chamber (2) which is surrounded by the drum (1), at least two or several ribs (17) are provided in a solid matter chamber (15) disposed outside of the disc stack and a gap between the ribs (17) and the internal wall of the drum (1) is equal to or greater three millimetres.

Description

 Self-draining separator with disc package

The invention relates to a self-draining separator with disc package according to the preamble of claim 1.

Self-emptying separators with disk packs which, for example, have a piston slide or the like for emptying, are known per se in a wide variety of embodiments. They are used in different types of centrifuges, e.g. Used in clarifying, separating or sterilizing centrifuges for a variety of purposes. The preferred area of application is the processing of dairy products and in particular the sterilization and skimming of milk.

It is also known to provide self-emptying centrifuge drums with ribs outside the plate pack. Such an arrangement is shown, for example, in US Pat. No. 2,126,864, which shows a separator with a drum with solids discharge openings, which can be closed by a piston slide.

In today's usual self-cleaning separators u.U. Cleaning problems on. It turns out that the cleaning effect on the drum cover and on the bottom of the centrifugal space in the drum is particularly problematic and that there is often still contamination to be found after an automatic cleaning.

Against this background, the invention has the object to improve the structural design of the separator in the generic way such that an improved cleaning effect can be achieved.

The invention solves this problem by the subject matter of claim 1. According to the invention, the drum has Feststoffaustragsöffhungen and the Ab¬ stood between the ribs - or the advantageous realized rib insert - and the inner wall of the drum is at least three millimeters at each point.

Thus, such a large distance between the ribs and the inner shell of the drum is realized that in the solid space at any point sufficiently large distances between the ribs and the drum inner shell, in particular the Trommelde¬ ckel and the bottom of the centrifugal space and preferably to other hinsicht¬ Lich the Cleaning critical points exist, which is on the outer peripheral surface and in other peripheral regions of the centrifugal space always sufficient relative movement of the liquid relative to the drum in the circumferential direction zuge¬ is allowed.

The prior art still DE 567 665, DE 444.573, US 2,662,687 and US 2,313,541 called. These documents each show Kammerse¬ parators with rib inserts outside the disk pacts, but no solid discharge openings, so that the advantages of the invention can not arise. The US 2,477,982 shows a self-draining separator with outlet openings without spool, with ribs outside the plate package in turn extend to the drum lid. US 5,735,789 shows a separator with a disk package with rib-shaped spacers.

Advantageous developments and refinements of the invention can be found in the dependent claims.

Preferably, an annular gap of at least 0.5 mm, but not more than 5 mm, is formed between the ribs and the plate pack in order to sufficiently clean this region as well.

According to a further embodiment of the invention, it is advantageous if the ribs cover at least 5 percent but not more than 95 percent of the cross-sectional area of the solids space in order to always ensure a sufficiently large cleaning effect. In a design as Trennseparator it is according to the invention of the invention fer¬ ner advantageous if the outer diameter of the ribs at least 1 mm, but at most 25 mm larger than the diameter of the separator plate.

In this case, the center of gravity of the rib surface should preferably be above the drainage level. Alternatively, it is also conceivable to arrange this center of gravity below the emptying level, but this leads to less advantageous results.

According to a further advantageous development of the invention, the rib surfaces are provided with compensation openings. These relieve the ribs in Trommelent¬ emptying advantageously of tips of the Coriolisdruckes.

It is also advantageous to position the ribs so that their surfaces are each aligned at an angle of up to 45 ° leading or trailing to the radius of the drum.

After development of the invention, it is also conceivable to use three-dimensionally curved blades instead of flat ribs.

Finally, it has been shown that at least two, but preferably 8 to 24 ribs should be distributed in particular uniformly on the outer circumference of the plate package.

Advantageously, the ribs are combined by connecting elements to form an annular insert, which facilitates the assembly and disassembly of the ribs as a unit.

This rib insert is also preferably fixed in position by support elements which are integrated in the telescope package.

In addition, the rib insert for fixing is preferably firmly connected to the separator plate - if present. The invention will be described in more detail below with reference to the figures with reference to preferred embodiments. It shows:

Figures 1 to 6 are schematic sectional views of a portion of a erfin¬ to the invention separator drum;

Figure 7 is a schematic representation of the design of ribs according to a particular embodiment of the invention;

Figure 8 is a schematic representation of a rib insert in one

Top view.

Figure 1 shows a highly schematic illustrated drum 1 for an otherwise not with regard to its other components such as the drive and the like. shown separator with a vertical axis of rotation D, wherein the drum um¬ a centrifugal space 2 borders, in which a plate package 3 of a plurality of conical plate 4 is inserted, in which one or more riser channels 5 are formed.

It should be noted that the terms such as "top", "bottom", "front" or "rear" and the like. refer only to the illustrated schematic examples and are not to be understood as limiting. Thus, the inlet pipe in alternatives, not shown embodiment, also be guided from below into the drum, although in Figure 1, a variant is shown, in which the inlet pipe is guided from above into the drum.

The centric inlet pipe 6 opens from here initially from above into a distributor 7, which has channels 8, which conduct the material to be centrifuged outwards as far as exit openings 9 into the centrifuging space 2.

The outlet openings 9 can be arranged at different radii, preferably on those radii which lie shortly before or within or after or outside the outer circumference of the plates 4. The drum has Feststoffaustragsöffnungen 10, which are preferably at the largest diameter of the drum and which preferably a piston slide (not shown) is connected upstream. To realize the self-emptying function or to open and close the solids discharge openings 10 can serve, for example, a not shown here spool.

At least one discharge channel 11, which may be followed by a paring disc, allows the discharge of a liquid phase from the centrifugal space 2.

According to the embodiment of Figure 2, which is shown in simplified form, so that the inlet pipe and the channels and outlet openings of the manifold are not darge, it is still possible to derive a second liquid phase via a separator plate 23 (outer diameter Ds) from the drum.

The drum 1 has a drum base 12 and a drum shell 13, or the like via a locking ring 14. are firmly connected.

Outside the plate package, a rib insert 16 (see FIG. 8) with a plurality of ribs 17 is arranged in the radially outwardly tapering ring or solid space 15, the ribs 17 being joined to the insert 16 by connecting elements 18, 19.

The insert can be fixed in its position by supporting elements that are integrated in the plate package (not shown here). Also, the insert is spaced at any position at least 3 mm from the drum inner wall

Alternatively, it is also conceivable to firmly connect the rib insert 16 for fixing with the divider plate 23 of FIG.

It is important that the rib insert 16 is firmly fixed in the solid space 15 in its position. As can be seen in FIG. 8, the ribs can be directed radially outwards or, with regard to the direction of rotation (R) - see FIG. 7 - in particular up to 45 ° inclined to the radial r (angle α) can be aligned leading or lagging.

It is now important that at the outer edges of the ribs 17 and the drum base 12 and the drum shell 13 each have a gap Sl, S2 remains which is all around at least 3 mm or more wide at each rib. Furthermore, there is preferably between the ribs and the plate package, a further annular gap S3 of at least 0.5 mm and a maximum of 5 mm in width.

Such a particularly advantageous cleaning effect is achieved because it is ensured that always a sufficiently large cleaning effect in the solid space 15 is achieved because at all points between the ribs 17 and the drum 1 is always a sufficiently large flow at critical points and in particular at the On the outer peripheral surfaces in all peripheral regions of the centrifugal space, a relatively large relative movement of the fluid relative to the drum in the circumferential direction is allowed.

FIG. 1 shows a variant in which the ribs 17 cover a large part of the cross section of the solids space, in particular up to 95 percent of the cross section of the solids space 15.

The cross-section of the ribs 17 in Figure 2, however, is slightly smaller, in Figure 2 also the additional cutting plate 23 is provided. The outer diameter D _{A of} the ribs is at least 2 mm and a maximum of 25 mm larger than the diameter D _{5 of} the separator plate 23rd

FIG. 3 illustrates that the center of gravity Pl of the rib surfaces lies above its plane of action, which is determined by the solids discharge opening 10.

FIG. 4 illustrates a corresponding variant in which this center of gravity P2 of the ribs is arranged below the plane of the solids discharge opening 10. FIG. 5 illustrates further connecting elements (eg rings) 20, 21 for connecting the ribs 17 to one another.

FIG. 6 shows that the ribs can be provided with openings 22 in order to relieve the rib areas 17 of the ribs 17 at the solids discharge of peaks of the Coriolis pressure.

reference numeral

Drum 1

Centrifugal space 2

Plate package 3

Plate 4

Inlet pipe 6

Distributor 7

Channel 8

Outlet opening 9

Solid outlet 10

Discharge channel 11

Drum base 12

Drum shell 13

Lock ring 14

Solid space 15

Ring insert 16

Ribs 17

Connecting element 18

Connecting element 19

Connecting element 20

Connecting element 21

Opening 22

Divider plate 23

Annular gaps S1, S2, S3

Outer diameter ribs D _A

Rotation axis D

Outer diameter of divider plate Ds

Direction of rotation R

Radial r

Focal points Pl, P2

Angle α

Claims

claims 1. Self-emptying separator with a vertical axis of rotation and a Trom¬ mel (1) with solids discharge openings (10) into which a plate package (3) of a plurality of conical plates (4) is inserted, a centrifuged material via an inlet pipe (6) and a Distributor (7) in a centrifugal space (2), which is surrounded by the drum (1), is introduced, wherein in an annular solid space (15), which is arranged radially outside of the plate package (3), at least two or more ribs ( 17), characterized gekenn¬ characterized in that the distance between the ribs (17) and the Innenwan¬ tion of the drum (1) is at least three millimeters. 2. Separator according to claim 1, characterized in that between the ribs (17) and the disc package (3) an annular gap (S3), which is at least 0.5 mm wide and at most 5 mm wide at each point. 3. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) cover at least 5 percent and at most 95 percent of the Querschnittsfiäche of the solids space (15). 4. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that in the drum a divider plate (23) is arranged and that the diameter (D _A ) of the ribs (17) is at least 2 mm but not more than 25 mm larger than the diameter (Ds) of the separating plate (23) above the plate package (3). 5. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the center of gravity (Pl) of the rib surfaces of the ribs (17) is above the emptying level, which is predetermined by solids discharge openings (10). 6. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the center of gravity (P2) of the rib surfaces of the ribs (17) unter¬ half the emptying plane, which is predetermined by the Feststoffaustragsöffhung (10) of the drum. 7. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) have at least one or more openings (22) in their rib area. 8. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) are radially aligned. 9. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) are aligned relative to the radius of the drum by up to 45 ° leading or lagging. 10. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) are flat. 11. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) are formed aus¬ as multi-dimensionally curved blades. 12. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that 8 to 24 of the ribs (17) are inserted into the drum (1). 13. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the ribs (17) by means of connecting elements (18, 19, 20, 21) are combined to form an annular, pre-assembled insert (16). 14. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the insert (16) by support elements, which are integrated in the disc package (3) is fixed in its position. 15. Separator according to one of the preceding claims, characterized gekennzeich¬ net, that the insert (16) for fixing firmly connected to the cutting plate (23).