EP2244835A1

EP2244835A1 - Separator drum with a drum cover comprising many parts

Info

Publication number: EP2244835A1
Application number: EP09708620A
Authority: EP
Inventors: Wilfried Mackel; Angelika Voltmann
Original assignee: GEA Westfalia Separator GmbH
Current assignee: GEA Mechanical Equipment GmbH
Priority date: 2008-02-08
Filing date: 2009-02-03
Publication date: 2010-11-03
Also published as: DE102008008120A1; WO2009098199A1

Abstract

A separator drum (3) of a continuously operating separator, comprising a vertical rotating axis, a drum upper section (1) comprising an inner radial drum cover ring (6) and a outer radial drum cover ring (7) directly adjacent thereto, a drum lower section (2), a plate package (4) disposed inside the centrifugal drum (1), said package comprising separating plates (5), solids discharge openings (26) and at least one or more fluid outlets provided with stripping discs (30, 31) in particular, wherein the inner and the outer drum cover ring (6, 7) are connected together directly by way of connection means (10, 11) and are held against one another without the connection means being connected to the drum lower section (2).

Description

Separator drum with multi-part drum lid

The invention relates to a separator drum according to the preamble of claim 1.

For separators with vertical axis of rotation i.allg. along the machine axis through an inlet pipe and this downstream radial distribution channels the product feed into the centrifugal drum, where the product in a plate stack of i.allg. arranged close to each other, relatively spaced, conical (separation) plates enters. At the separation plate heavier solids i.allg. at the bottom and migrate to the outer periphery of the Tellerpakts, whereas the liquid flows inward (two-phase liquid-solid separation). Solids are often discharged via nozzles or via solids discharge openings with upstream piston valves. Under separation plate here are plates to understand how they are used in clarifying or Trennseparatoren. The term is not intended to be limiting in this respect

The drum with vertical axis of rotation generally has a drum base and a drum shell or lid part, which are screwed together by means of a separate closure ring. Such a construction is e.g. known from DE 35 1 1 422 or DE 39 36 165 Al. Direct insertion of the drum base into the drum top - see, e.g. US Pat. No. 2,369,222 or EP 0 312 233 B1 may lead to undefined running conditions, as the drum parts are damaged due to the currently high speeds of use of e.g. up to 15000 rpm in operation too much, which in turn can lead to the loss of an exact guidance of the parts to each other. This also applies to the idea of a direct screw connection between a drum base and a lid. Structures of this type are shown by the centrifuge of EP 0309 478 B1 and the generic separator of US Pat. No. 1,356,274.

A centering ring which engages or clamps the outside of the drum part is known from PCT / SE / 00249.

The technological background is further mentioned in DE 39 10 302 C1 _5, US Pat. No. 5,941,811 A, DE 38 13 646 A1 ₅ DE 10 2005 005 660 A1 and DE 36 44 098 A1. Against this background, a functional direct connection between the drum top (also called drum lid) and the drum base, which does not require a centering ring and is fully functional even at higher speeds, is of great interest. Such a construction creates the DElO 2004 042 888.3, according to which the Trommerunterteil and the drum shell are screwed together without closure ring and clamped together.

The generic foreign GB 1 514 073 A shows a construction in which, although the insertion of the plate package is simple, but has an extremely complicated shaped and only very expensive to produce drum base.

From EP 0023252 a generic separator is known, wherein the inner and the outer drum lid ring are bolted together and with the drum base by bolts which axially pass through the drum interior, which affects the flow conditions in the drum during operation and is complicated and expensive.

The solution of the above problem is the object of the invention.

The invention solves this problem by the subject matter of claim 1.

The invention provides a separator drum of a continuously operable separator with a vertical axis of rotation, with a drum shell having a radially inner drum cover ring and an immediately adjoining radially outer drum cover ring, with a drum base, with a in the

Centrifugal drum arranged disc pack of separating discs, with Feststoffaustrags- openings, with at least one or more fluid outlets, which are in particular provided with peeling discs, wherein the disc packet has an outer circumference which is smaller than the inner circumference of the outer drum cover ring, further wherein the inner and outer drum cover ring are connected directly to each other via connecting means and held together without the connecting means are connected directly to the drum base, and wherein the outer drum cover ring is provided at its outer periphery with an external thread which is screwed into an internal thread on the inner circumference of the drum base, wherein the outer drum Cover ring on its outer circumference with a flange on rests on the upper edge of the lower drum part and this trapped on the outside with a hook-like ring approach.

Since the inner and the outer drum cover ring are connected directly to one another via connecting means and held together without the connecting means are also connected directly to the drum base, can be dispensed with the drum interior according to EP 0 023 252 passing through bolt, which after Prior art was not considered possible. The flow conditions are therefore no longer impaired. In addition, the construction is simpler and less expensive.

The invention is particularly suitable in connection with a closure ring-free and hinterklammerden connection between the drum base and drum top - as such a particularly advantageous in operation and against expansion of the drum base in operation simply secured secure connection of these parts is created - and preferably for a Separatortrommel with a piston valve mechanism for emptying the separator drum. Here, the interior can be made particularly large.

The Scheidetellermontage is particularly simple by the invention, at least if the divider plate is not greater than the diameter of the inner lid part.

The invention will be described in more detail by means of embodiments with reference to the drawing with reference to embodiments. It shows:

1 shows a sectional view through a first embodiment of a separator according to the invention;

2 shows a sectional view through a section of a second separator according to the invention.

Fig. 1 shows a rotatable Separatortroinmel with a vertical axis of rotation D, which has a drum shell 1 and a drum base 2. The drum shell 1 is formed conically on its inner circumference and on its outer circumference.

In the drum, a plate package 4 is arranged from Trenntellern 5. The drum above part 1 consists of a radially inner drum cover ring 6 and a radially outer drum cover ring 7 immediately adjacent thereto, which overlap radially in their connecting region, the inner drum preferably extending in sections above the outer region of the outer drum cover ring 6 rests.

The contact surface 8 between the inner and the outer drum lid ring 7 is aligned parallel to the horizontal or flat here according to Fig. 1, but this is not mandatory. The contact surface can also be formed slightly angled to the horizontal.

Preferably, a radial flange or hook projection 9 of the inner drum cover ring 6 radially engages behind a step 33 on the outer periphery of the outer drum cover ring, which stabilizes the arrangement, because during operation during rotations of the separator drum, the widening outer drum cover ring 7 lays against the flange approach.

In addition - Fig. 1 - or alternatively - Fig, 2 - are the inner and the outer drum melmeldeckelring 6, 7 directly connected via connecting means 10, 11 directly to each other and held together. In this case, the connecting means 10, 11 are not connected to the drum base 2, which was considered necessary according to the prior art of EP 0023252, but this disturbs the flow paths in the separator drum and makes the construction too expensive.

As the connecting means of Fig. 1 bolts 10 are used, which are screwed vertically from above through corresponding holes 12 of the inner drum cover ring 6 in blind holes 13 of the lower lid portion 7, so that the flow in the drum are not affected.

According to Fig. 2, however, a screw-lock ring 11 is used as the connecting means, which has a radial cut 14, with which it rests on the outer peripheral portion of the inner drum cover ring 6 and an internally threaded portion 15, which on a corresponding male threaded portion 16 at a axially extending inner shoulder 32 of the outer drum cover ring 7 is screwed. In this way, the inner drum cover ring 6 in the connecting region between the drum cover rings 6, 7 turn axially down on the inner circumference of the outer drum cover ring 7 pressed, these rings 6 ₅ 7 of Fig. 2 in the region of their contact surfaces 17 sections axially and partially radially abut each other , so that even this investment area is stable and dense. Optionally, a sealing ring 3 can be arranged in the joint area.

Both the inner drum cover ring 6 and the outer drum cover ring 7 are each at least on its inner circumference and - according to FIG. 1 - preferably also conically formed on its outer circumference, wherein the inner and possibly the outer Konizitätswinkel α, ß relative to the axis of rotation D or to a parallel to the axis of rotation D on the outer drum cover ring 6 is smaller in each case than on the inner drum cover ring 7. The subdivision of the cover into several parts offers insofar new optimization options in terms of drum design.

The disk package 4 has an outer circumference smaller than the inner circumference of the outer drum cover ring 7. The difference in circumference may be smaller than 5 mm. The arrangement is particularly easy to assemble, which was problematic in the prior art, because the plate package 4 is directly accessible through the outer drum cover ring 7 therethrough.

The outer drum cover ring 7 is provided on its outer circumference with an external thread 18 which is screwed into an internal thread 19 on the inner circumference 20 of the drum bottom part 2. In turn, the drum cover ring 7 rests on its outer circumference with a flange region 21 on the upper edge 22 of the drum base 2 and preferably with a hook-like, axially downwardly extending annular projection 23, wherein the Anlagefiäche 24 may optionally be formed conical.

In this way, in each case a direct, closure-ring-free connection or screw connection between the lower drum part 2 and the upper drum part 1 is realized and nevertheless effectively prevented in a likewise simple manner that the expansion of the drum lower part 2 during the rotation during operation in the region of the screwing problems occur. It is also conceivable that the outer Tϊommeldeckelring 7 and the drum lower part 2 are connected to each other via a lock ring.

In the drum base 2, a piston valve 25 is arranged, which serves for opening and closing of solids discharge openings 26 (not shown here) in the lower drum 2 drum, so that the so far discontinuous also of solids emptied separator for continuous operation. The piston slide 25 is formed conically inwardly counter to the inner periphery of the drum shell 1. The spool valve 25 can be connected in a manner known per se, e.g. be hydraulically actuated, which is not shown here in detail.

At least one or more liquid outlets - here with peeling disks 30, 31 are provided ~ serve to discharge at least one or more liquid phases from the drum to feed the centrifuged material.

According to the embodiment of FIG. 2, the inner drum cover ring 6 is integrally formed in a simple manner as Schälkammer- or gripper chamber lid 34, which peeling chamber (s) 35, 36 for the paring disc (s) 30, 31 limited and possibly with one or a plurality of inner lugs 37 is provided.

In this case, the inner drum cover ring 6 can be provided with drain holes for a respective product phase to be discharged, which extend into the peeling chamber, so that even an otherwise to be provided divider plate is replaceable.

According to Fig. 1, the peeling chamber cover 38, however, is designed as a separate part to the inner drum cover ring 6.

reference numeral

Drum shell 1

Drum base 2

Sealing ring 3

Plate package 4

Separating plate 5 inner drum lid ring 6 outer drum lid ring 7

Contact surface 8

Flange or hook attachment 9

Screw closure ring 11

Bolt 10

Bores 12

Sack punch 13

Radial section 14

Female thread section 15

Male thread section 16

Contact surface 17

External thread 18

Internal thread 19

Inner circumference 20

Flange area 21

Edge 22

Ring attachment 23

Contact surface 24

Piston valve 25

Inlet 27

Distributor 28

Peeling discs 30, 31

Approach 32

Grading 33

Shale chamber cover 34

Chap- ter disc (s) 35, 36

Approaches 37

Peeling chamber cover 38

Konizitätswinkel α> ß

Rotation axis D

Claims

claims

Separator drum (3) of a continuously operable separator with a vertical axis of rotation, with a) a drum ob erteil (1) having a radially inner drum cover ring

(6) and an immediately following radially outer drum cover ring (7), b) a drum base (2), c) in the centrifugal drum (1) arranged plate package (4) of separation plates (5), d) Feststoffaustragsöffnungen ( 26), e) at least one or more liquid outlets, which are in particular provided with paring disks (30, 31), f) wherein the disk package (4) has an outer circumference smaller than the inner circumference of the outer drum cover ring (7), characterized in that g) the inner and outer drum cover rings (6, 7) are directly connected and held together by connecting means (10, 11) without the connecting means being directly connected to the drum base (2), h) the outer one Drum cover ring (7) is provided at its outer periphery with an external thread (18) which is screwed into an internal thread (19) on the inner circumference (20) of the drum base (2), wherein the outer e drum cover ring (7) rests on its outer periphery with a flange portion (21) on the upper edge (22) of the Trommelun- terteils (2) and this outside with a hook-like annular projection (23) behind.

2. Separator drum according to claim 1, characterized in that the inner drum cover ring (6) and the outer drum lid ring (7) in one

Overlap contact area radially.

3. Separator drum according to claim 2, characterized in that the inner drum cover ring (6) partially rests on the outer drum cover ring (6).

4. Separator drum according to claim 2, characterized in that the contact surface (8) between the inner and the outer drum cover ring (6, 7) is aligned at an angle to the horizontal.

5. separator drum according to claim 2, characterized in that the bearing surface (8) between the inner and outer drum cover ring (6, 7) is aligned horizontally flat.

6. Separator drum according to claim 2, characterized in that the abutment surface between the inner and the outer drum cover ring (6, 7) is partially aligned axially and partially radially to the rotational axis.

7. Separator drum according to one of the preceding claims, characterized in that a radial flange or hook projection (9) on the inner drum cover ring (6) radially outside the outer drum lid ring (7) engages behind.

8. Separator drum according to one of the preceding claims, characterized in that the connecting means comprise bolts (10) which cover the inner and the outer drum cover ring (6, 7) screw together.

9. Separator drum according to one of the preceding claims, characterized in that the bolts (10) vertically from above through holes (12) of the inner drum lid ring (6) in blind holes (13) of the lower lid portion (7) are screwed.

10. Separator drum according to one of the preceding buttresses, characterized in that the connecting means is designed as a screw closure ring (11).

1 separator drum according to one of the preceding claims, characterized in that the Schraubverschlussring (1 1) has a radial portion (14), with which it rests on the inner drum cover ring (6) and an internally threaded portion (15) on a corresponding male threaded portion (16) is screwed to the outer drum cover ring (6).

12. Separatoitrommel according to any one of the preceding claims, characterized in that the inner Tϊommeldeckelring (6) and the outer drum cover ring (7) are each formed at least on its inner circumference and preferably also on its outer circumference each conical.

13. Separator drum according to one of the preceding claims, characterized in that the inner drum cover ring (6) and the outer drum cover ring (7) at least on its inner circumference relative to the axis of rotation (D) have different Konizitäts angle.

14. Separator drum according to one of the preceding claims, characterized in that the outer drum cover ring (7) and the drum base (2) are connected without closure ring together.

15. Separator drum according to one of the preceding claims, characterized in that the outer drum cover ring (7) and the lower drum part (2) are screwed together and clamped directly without closure ring.

16. Separator drum according to one of the preceding claims, characterized in that the inner drum cover ring (6) is formed integrally with the peeling chamber or gripper chamber lid (34), which one or more peeling chamber (s) (35, 36) for the Paring disc (s) (30, 31) limited.

17. Separator drum according to one of the preceding claims, characterized in that the inner drum cover ring (6) is provided with one or more Ablaufbonrungen, preferably extending into the one or more peeling chamber (s).

18. Separator drum according to one of the preceding claims, characterized in that the peeling chamber cover (38) is designed as a separate part from the inner drum cover ring (6).