CENTRIFUGE AND METHOD OF LOADING A CENTRIFUGE

• US 20150238977A1
• Filed: 02/13/2015
• Published: 08/27/2015
• Est. Priority Date: 02/26/2014
• Status: Active Grant

• Current Assignee: Ferrum AG
• Original Assignee: Ferrum AG
• Inventors: MEIER, Daniel
• Granted Patent: US 10,639,647 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B04B 11/02 Continuous feeding or discharging; Control arrangements therefor
• CPC Class Codes: B04B 11/06 Arrangement of distributors or collectors in centrifuges
• CPC Class Codes: B04B 13/00 Control arrangements specially designed for centrifuges; Programme control of centrifuges control arrangements for feed, charge, or discharge B04B11/00
• CPC Class Codes: B04B 15/06 for cleaning bowls, filters, sieves, inserts, or the like
• CPC Class Codes: B04B 3/02 discharging solid particles from the bowl by means coaxial with the bowl axis and moving to and fro, i.e. push-type centrifuges

Abstract

Disclosed is a pusher centrifuge comprising a screen drum rotatable about an axis of rotation for separating a mixture into a solid cake and into a liquid phase, and a pusher base apparatus arranged in the screen drum which is arranged movable to and fro alternately in a first pushing direction and a second pushing direction along the axis of rotation so that the solid cake can be alternately displaced along the axis of rotation. The mixture is introduced into a first empty space or into a second empty space by means of a feed device, which first empty space is established on a displacement of the solid cake by the pusher base apparatus in the first pushing direction and the second empty space is established on a displacement of the solid cake by the pusher base apparatus in the pushing direction opposite to the first pushing direction.

Claims

1. A centrifuge, in particular a double-action pusher centrifuge, or a single-stage or multistage pusher centrifuge, comprising a screen drum (3) which is rotatable about an axis of rotation (2) for separating a mixture (4) into a solid cake (5) and into a liquid phase (6), a pusher base apparatus (8) which is arranged in the screen drum (3) and which is arranged movable to and fro alternately in a first pushing direction (S1) and a second pushing direction (S2) along the axis of rotation (2) such that the solid cake (5) is alternately displaceable along the axis of rotation (2) as well as a feed device (1000) with which the mixture (4) can be introduced into a first empty space (1101) or into a second empty space (1102), which first empty space (1101) can be established on a displacement of the solid cake (5) by the pusher base apparatus (8) in the first pushing direction (S1) and the second empty space (1102) can be established on a displacement of the solid cake (5) by the pusher base apparatus (8) in the pushing direction (S2) opposite to the first pushing direction (S1), wherein the feed device (1000) comprises a feed redirection control (1020) and a mixture supply (1010) such that the mixture (4) can be supplied by means of the feed redirection control (1020) via the mixture supply (1010) to the first empty space (1101) or to the second empty space (1102) in accordance with a predefinable scheme.

2. The centrifuge in accordance with claim 1, wherein the feed device (1000) comprises an inlet pipe (1030) having an inlet pipe axis (EA) and the feed redirection control (1020) comprises a metering device (1021, 10211) which is provided at the inlet pipe (1030) and with which the mixture supply (1010) can be manipulated in accordance with a predefinable scheme such that a supply of the mixture (4) into the first empty space (1101) or into the second empty space (1102) is suppressed.

3. The centrifuge in accordance with claim 2, wherein the metering device (1021, 10211) is a metering piston (10211) arranged at least partly in the inlet pipe (1030).

4. The centrifuge in accordance with claim 2, wherein the metering device (1021, 10211) is a metering bush arranged at least partly outwardly at the inlet pipe (1030).

5. The centrifuge in accordance with claim 2, wherein the metering device (1021, 10211) is arranged displaceable along the inlet pipe axis (EA) or rotatable about the inlet axis (EA).

6. The centrifuge in accordance with claim 1, wherein the mixture supply (1010) is an integral component of the inlet pipe (1030) and preferably comprises a first supply opening (1011), not movable with respect to the inlet axis (EA), for the supply of the mixture (4) into the first empty space (1101) and a second supply opening (1012), not movable with respect to the inlet axis (EA), for the supply of the mixture (4) into the second empty space (1102).

7. The centrifuge in accordance with claim 1, wherein the mixture supply (1010) is an integral component of the metering device (1021, 10211) and preferably comprises a first supply opening (1011), movable with the metering device (1021, 10211) with respect to the inlet axis (EA), for the supply of the mixture (4) into the first empty space (1101) and a second supply opening (1012), movable with the metering device (1021, 10211) with respect to the inlet axis (EA), for the supply of the mixture (4) into the second empty space (1102).

8. The centrifuge in accordance with claim 1, wherein a plurality of mixture supplies (1010) or a plurality of metering devices (1021, 10211) are provided.

9. The centrifuge in accordance with claim 1, wherein the feed device (1000) comprises a plurality of inlet pipes (1030) having a feed redirection control (1020) and a mixture supply (1010) such that the mixture (4) can be supplied to the first empty space (1101) or to the second empty space (1102) in accordance with a predefinable scheme.

10. The centrifuge in accordance with claim 9, wherein the mixture (4) can be supplied separately by the feed redirection control (1020) to at least some of the inlet pipes (1030) or to a group of inlet pipes (1030).

11. The centrifuge in accordance with claim 1, wherein the feed redirection control (1020) can be manipulated by means of a mechanical drive or of an electrical drive or of a hydraulic drive or of a pneumatic drive and can preferably be controlled or regulated by means of a control unit in accordance with a predefinable scheme.

12. The centrifuge in accordance with claim 1, wherein a washing device (W) is provided for washing the solid cake (5) by means of a washing fluid (F), wherein the washing device (W) is preferably identical to the feed device (1000) or to a part of the feed device (1000).

13. The centrifuge in accordance with claim 1, wherein a feed metering unit (D) is provided for the controlled supply of the mixture (4) or of the washing fluid (F) such that a predefinable quantity of the mixture (4) or a predefinable quantity of the washing fluid (F) can be supplied to the feed device (1000), and/or wherein an inlet disk (9) is provided, preferably at the inlet pipe (1030), for the controlled supply of the mixture (4) into a predefinable region of the screen drum (3).

14. A feed redirection control for the centrifuge in accordance with claim 1.

15. A method of loading a double-action pusher centrifuge in accordance with claim 1 with a mixture (4) or with a washing fluid (F).