Imperforate bowl: centrifugal separators – With means for furnishing auxiliary fluid to material or... – Liquid
Patent
1998-05-08
2000-06-27
Cooley, Charles E.
Imperforate bowl: centrifugal separators
With means for furnishing auxiliary fluid to material or...
Liquid
494 37, 494 70, B04B 108, B04B 1506
Patent
active
060800984
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
A method and a device for internal cleaning of a centrifugal rotor, and a centrifugal separator equipped with a device of this kind. The present invention relates to a method and a device for internal cleaning of a centrifugal rotor, which is rotatable around a center axis and delimits in its interior an inlet chamber for receiving a liquid to be treated in the centrifugal rotor, a separation chamber communicating with the inlet chamber and at least one outlet chamber communicating with the separation chamber. The invention also relates to a centrifugal separator having a rotor of the kind just defined and a device for internal cleaning thereof.
BACKGROUND OF THE INVENTION
More particularly, in this connection, a centrifugal rotor is concerned which is included in a centrifugal separator comprising also an inlet device, which has an inlet channel and is arranged during normal operation of the centrifugal separator to supply into the inlet chamber through the inlet channel a predetermined flow of said liquid to be treated in the centrifugal rotor, and an outlet device which has at least one outlet channel and is arranged during normal operation of the centrifugal separator to discharge through the outlet channel a separated liquid from a first radial level in the outlet chamber out of the centrifugal rotor. Furthermore, the centrifugal separator comprises for internal cleaning of the centrifugal rotor a cleaning device including means for supply of a cleaning liquid to the interior of the centrifugal rotor, means for enabling movement of a liquid surface, formed within the outlet chamber at said first radial level during rotation of the centrifugal rotor, in a direction towards the center axis of the centrifugal rotor and at least one reconducting member, which delimits at least one reconducting channel having two ends and which is formed to be placed such that the reconducting channel opens with its one end in the outlet chamber at a second radial level, that is situated between the center axis of the centrifugal rotor and said first radial level, and opens with its other end in the inlet chamber.
A centrifugal separator of this kind is described in DE-30 41 210-C2. In this known centrifugal separator the reconducting member is intended and formed particularly for enabling cleaning of certain central parts of the centrifugal rotor, which are situated in the area of the inlet device extending into the inlet chamber. The reconducting member, is not, however, intended or formed for enabling cleaning of other parts of the centrifugal rotor, e.g. parts delimiting the main part of the inlet chamber, the separation chamber and the outlet chamber. For cleaning of these other parts of the centrifugal rotor use is instead made of the ordinary outlet device for liquid having been separated in the centrifugal rotor. Thus, a cleaning liquid is conducted during the cleaning operation out of the outlet chamber through the outlet channel and then again into the centrifugal rotor through said inlet channel. The recirculation flow of cleaning liquid through the outlet and inlet channels is then substantially larger than the flow of cleaning liquid passing through the reconducting channel.
For accomplishing an effective cleaning of the inlet, separation and outlet chambers of the rotor it is important that the flow of cleaning liquid through the centrifugal rotor is large. Thus, sometimes such a flow of cleaning liquid has to be several times larger than the flow of liquid flowing through the centrifugal rotor during the normal-use thereof. By means of an arrangement of the kind described in DE-30 41 210-C2 it is certainly possible to accomplish a relatively large circulation flow of cleaning liquid through the centrifugal rotor. A precondition for this is only that the outlet and inlet devices used for the recirculation are dimensioned for such a large circulation flow. However, this is not normally the case in practice, and the background thereof is the following.
It is important that an outlet d
REFERENCES:
patent: 2564899 (1951-08-01), Harstick
patent: 2575506 (1951-11-01), Acton
patent: 2603413 (1952-07-01), Orelind
patent: 2629547 (1953-02-01), Orelind
patent: 2906449 (1959-09-01), Sullivan
patent: 4871349 (1989-10-01), Tenthoff
patent: 5104371 (1992-04-01), Ajnefors
Borgstrom Leonard
Brehmer Patrik
Carlsson Claes-Goran
Franzen Peter
Inge Claes
Alfa Laval AB
Cooley Charles E.
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