公开(公告)号：US20220331817A1

公开(公告)日：2022-10-20

申请号：US17641524

申请日：2020-09-10

申请人： Alfa Laval Corporate AB

发明人： Leonard BORGSTRÖM ,  Olle TÖRNBLOM

IPC分类号： B04B5/04 ,  B04B1/08 ,  B04B11/02 ,  B04B13/00

摘要： A centrifugal separator for clarification of a liquid mixture into a heavy phase and a light phase, having a centrifugal separator bowl rotatable around an axis and encasing a separation space, and a sludge space radially outward of said separation space. The centrifugal separator bowl includes a hermetic inlet for feeding a liquid mixture to said separation space; a first hermetic outlet for a separated clarified light phase; and a second hermetic outlet for a separated heavy phase; a plurality of outlet conduits extending from an outer position in said sludge space to said second hermetic outlet. Each of the outlet conduits has a flow restriction in the form of a nozzle or vortex diode. A method to control such a centrifugal separator, in order to provide a stable flow through said outlet conduits, is also disclosed.

公开(公告)号：US20210245176A1

公开(公告)日：2021-08-12

申请号：US17251267

申请日：2019-06-12

申请人： Alfa Laval Corporate AB

发明人： Leonard BORGSTRÖM

IPC分类号： B04B11/08

摘要： A centrifugal separator having a device for the transformation of kinetic energy of a liquid rotating in a discharge chamber around a rotational axis to pressure energy includes a discharge element for the discharge of liquid out of the discharge chamber, which discharge element has a radially outer part shaped as a body of revolution about the rotational axis and is arranged to be located in a rotating liquid body in the discharge chamber, and at least one outlet channel formed in the discharge element and having an inlet opening located in a surface of the body of revolution and elongated in the liquid flow direction, the inlet opening connecting to the interior of an outlet tube via the outlet channel. The outlet channel has a defined axial height and a defined width which vary along their extension from the inlet opening to the connection to the outlet tube in such a way that a defined aspect ratio h/w decreases along at least a part of the extension of the outlet channel. A defined aspect ratio h/w is larger than 1 in an outer first part of the outlet channel and decreases to smaller than 1 in an inner second part of the outlet channel and the height decreases inwardly along the length of the outlet channel.

公开(公告)号：US20180117601A1

公开(公告)日：2018-05-03

申请号：US15566645

申请日：2016-04-22

申请人： ALFA LAVAL CORPORATE AB

发明人： Leonard BORGSTRÖM ,  Peter THORWID

IPC分类号： B04B13/00 ,  B04B1/08 ,  B04B11/02 ,  B01D17/02 ,  B01D17/12

CPC分类号： B04B13/00 ,  B01D17/0217 ,  B01D17/12 ,  B04B1/08 ,  B04B1/10 ,  B04B11/02 ,  B04B2013/006

摘要： Methods of supervising and controlling an E-line position in a centrifugal separator are disclosed herein. Further a centrifugal separator is disclosed herein. The E-line positon is continuously calculating based on inter alfa, monitored density of light and heavy liquid phases, monitored pressure at outlet side of light and/or heavy liquid outlet passages. First and/or second valves are controlled to control the E-line position, based on the supervised E-line position