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Alfa-Laval AB Patents
Assignee:
Alfa-Laval AB
Address:
Tumba, SE
No. of patents:
205
Patents:


1 2 3 4 5


Patent Number Title Of Patent Date Issued
RE30780 Heat treatment of heat-sensitive products October 20, 1981
Separate units of a heat-sensitive product are each pre-treated by heating at least the main part of the unit to a pre-heating temperature of at least 50.degree. C., a cooling medium being brought into direct or indirect contact with the unit so that its surface layer is prevented from
RE30310 Method and apparatus for treating heat-sensitive products June 17, 1980
Each unit of a heat-sensitive product is contacted directly or indirectly with a cooling medium so that the unit acquires a condition in which a surface layer thereof has a lower temperature than its inner portions. The product unit is then heated, by electromagnetic energy of at least
D275047 Pallet August 7, 1984
7070553 Method and arrangement to rapidly lower the rotary speed of a centrifugal separator July 4, 2006
In a method of rapidly lowering the rotary speed of a rotating rotor body in a centrifugal separator the lowering of the rotary speed is initiated, when a disturbing unbalance or vibrations have occurred. A space between the rotor body and a stationary casing which surrounds the rotor bo
6976948 Method for adjusting a radial level of an interface in a centrifugal separator December 20, 2005
A method for adjusting an interface formed during operation between a specific light liquid phase and a specific heavier liquid phase to a wanted radial level in a centrifugal separator, in which the separation chamber is emptied of its contents and the inlet opening is brought to a
6955637 Separation device having a centrifugal rotor October 18, 2005
In a separation device for separating particles from a liquid, which is present in a container, a centrifugal rotor is rotatable around a vertical rotational axis. The centrifugal rotor has a tubular inlet member, which extends down into liquid to be treated and which upon rotation of th
6837842 Method and device for indicating an undesired operation condition of a centrifugal separator January 4, 2005
An indication device indicates an undesired operation condition of a centrifugal separator and comprises an inlet valve situated in a supply conduit to the separator, and an outlet valve situated in an outlet conduit from the separator. During normal operation of the separator the va
6821319 Method and an apparatus for cleaning of gas November 23, 2004
In connection with cleaning of gas from particles suspended therein and being heavier than the gas the gas is caused to rotate in a chamber delimited in a stationary housing, so that the particles by centrifugal force are separated from the gas and are thrown towards a stationary hou
6802804 Method and a device for separation of a surface layer of a liquid body October 12, 2004
To clean a relatively heavy liquid from small amounts of relatively light liquid the liquids are first introduced into a container, in which the light liquid is allowed to collect on the surface of the heavy liquid. A surface layer of the liquid body in the container, constituting a mixt
6751951 Method and plant for cleaning of gases from a combustion engine June 22, 2004
Gases produced by a combustion engine, e.g. crankcase gases, are conducted through a separation chamber formed and surrounded by a centrifugal rotor, by means of which the gases are caused to rotate, so that particles suspended in the gases are separated by means of centrifugal force. Th
6716153 Centrifugal separator for separating solids from a liquid mixture centrally fed through a gear d April 6, 2004
In a decanter centrifuge having a rotor and a screw conveyor the rotor is suspended only at its one end, the rotational axis of the rotor extending vertically. The inlet of the rotor for a sludge containing liquid to be separated as well as the rotor outlet for liquid having been freed f
6712751 Centrifugal separator for separating solids from a liquid mixture centrally fed through a gear d March 30, 2004
In a decanter centrifuge having a rotor and a screw conveyor the rotor is suspended only at its one end, the rotational axis of the rotor extending vertically. The inlet of the rotor for a sludge containing liquid to be separated as well as the rotor outlet for liquid having been freed f
6676131 Sealing ring for a centrifugal separator January 13, 2004
Sealing ring (1) for a centrifugal separator with an axially open annular groove (7) for the sealing ring in a first rotor part (2) and a relative to the first rotor part (2) axially movable second rotor part (3), against which the sealing ring (1) sealingly abuts. Both the sealing ring
6662862 Plate heat exchanger December 16, 2003
The present invention concerns a plate heat exchanger for at least two heat exchanging fluids which is permanently joined with at least one sealing portion and has heat transferring plates (1-8), at least two end plates and inlet and outlet organs for the heat exchanging fluids. The core
6644391 Spiral heat exchanger November 11, 2003
The invention relates to a spiral heat exchanger including at least two spiral sheets (1, 2) extending along a respective spiral-shaped path about a common center axis (x) and forming at least two spiral-shaped, substantially parallel flow channels (4, 5). Each flow channel (4, 5) pe
6626814 Drive unit for a centrifuge rotor of a centrifugal separator September 30, 2003
A drive unit for a centrifuge rotor of a centrifugal separator is provided that includes a drive shaft, arranged to support the centrifuge rotor and rotatably journalled around an axis (z) of rotation, a casing, which forms an inner space for the drive shaft, a drive motor shaft which is
6616731 Method and arrangement to monitor a fatty oil treatment process carried through under vacuum September 9, 2003
The present invention is a method and apparatus for monitoring the vacuum conditions for the treatment of vegetable or animal oil. During the treatment, a number of processes, such as refining, bleaching and/or deodorization, are carried out under a vacuum. The vacuum is maintained by
6616589 Method and equipment for controlling the position of an interface between separated liquids in a September 9, 2003
The invention disclosed is control equipment for use with a nozzle centrifuge for separating a light phase liquid, a heavy phase liquid, and/or solids from a mixture thereof wherein the separated heavy phase and solids are continuously removed through nozzles that are arranged at the
6578670 Drive unit for centrifuge rotor of a centrifugal separator June 17, 2003
The invention refers to a drive unit (1) for a centrifuge rotor (2) of a centrifugal separator. The drive unit (1) includes a drive shaft (3), which is arranged to support said centrifuge rotor (2) and is rotatably journalled around an axis (z) of rotation, a casing (6), which forms an
6537191 Centrifugal separator March 25, 2003
In a centrifugal separator for separating solids from a liquid mixture in which the solids in the form particles are suspended in a liquid having a density less than that of the particles the centrifugal separator includes a rotor rotatable at a first speed. A screw conveyor is arranged
6536511 Device for treating a gas March 25, 2003
A device for treating a substantially gaseous medium includes a number of parallel plates (14) which are connected to each other and provided adjacent to each other in such a manner that they, via port holes in the plates (14), form a first channel (5) and a second channel (9, 9'). The
6536211 Method and plant for cleaning of gases from a combustion engine March 25, 2003
Gases produced by a combustion engine (1), e.g. crankcase gases, are conducted through a separation chamber formed and surrounded by a centrifugal rotor (R), by means of which the gases are caused to rotate, so that particles suspended in the gases are separated by means of centrifug
6533713 Entraining device for a centrifugal separator March 18, 2003
The invention is an entrainment device for a centrifugal separator. The entrainment device is comprised of two axial delimiting surfaces. One axial delimiting surface turns axially towards and the other turns axially away form an inlet chamber outlet of the separator. The entrainment dev
6508752 Centrifugal separator having end walls and a central shaft to resist axially directed forces January 21, 2003
In a centrifugal separator for separating solid particles from a liquid, a centrifugal rotor (2) has two axially separated end walls (13, 14) and a surrounding wall (17) arranged therebetween. The end walls (13, 14) and the surrounding wall (17) surround a separation chamber (20) in whic
6432034 Looking ring for a centrifugal separator August 13, 2002
A locking ring for joining a first and second of a rotor in a centrifugal separator, the first rotor part having a cylindrical end portion, and the second part having an annular flange. A locking ring is arranged to be positioned into a recess and via two radially outer contact surfaces
6428460 Support device for a centrifugal separator providing axial and radial support August 6, 2002
The invention refers to a support device for a centrifugal separator having a centrifuge rotor (2), which is provided in a frame (1) to be rotatable about an axis (x) of rotation by use of a bearing member (4). The support device is provide between the bearing member and the frame and pe
6397940 Method of joining at least four heat transfer plates to a plate package, and a plate package June 4, 2002
The application discloses a method of joining at least four heat transfer plates (2) to a plate package for a plate heat exchanger. Each heat transfer plate (2) comprises an outer edge portion (10) extending around the heat transfer plate in its edge area and an inner edge portion (11)
6394179 Plate heat exchanger May 28, 2002
Corrugated heat exchanger plates (2) of a plate heat exchanger have outer edges of a similar design. A first set of the heat exchanger plates are brazed together in their outer edges and around at least two port holes, as well as, preferably, at all of the points upon the heat exchanger
6358193 Regulation device for a centrifugal separator to control discharge from outlets March 19, 2002
In a centrifugal rotor (1) for separation of a substance from a liquid mixture supplied to the centrifugal rotor there is delimited a separation chamber (7) having peripheral outlets (30). The centrifugal rotor includes an outlet device (20-28) for intermittent opening and closing of the
6328278 Outlet valve December 11, 2001
An outlet valve is arranged in the bottom of a vessel intended to be filled with liquid and has a valve disc (1) connected to a piston rod (4) and a piston (5) actuated by a pressure medium. The valve disc (1) is movable between a first and a second position and is arranged to bear again
6325751 Centrifugal separator casing with reduced separated product discharge velocity December 4, 2001
A centrifugal separator has a centrifuge rotor (1), which is rotatable about a vertical axis (x) of rotation and has at least one outlet (3) around the periphery for intermittently discharging a separated product. The separator has a casing (4), which encloses the rotor, and a space (6),
6319186 Method and a device for cleaning of a centrifugal separator November 20, 2001
In a particular type of centrifugal rotor for dividing a liquid mixture into one liquid phase having a low viscosity and one concentrate phase having a high viscosity, the concentrate phase on its way towards an outlet chamber (17) in the rotor has to flow through a vortex device (20).
6312372 Outlet of a centrifugal separator having a reaction driven rotor November 6, 2001
The invention relates to an apparatus for the separation of contaminants from a pressurized liquid. Specifically, the apparatus is a centrifugal rotor adapted to be reaction driven by the pressurized liquid arranged within a housing. The housing has an outlet that is oriented in a di
6267204 Device for the supply of liquid under pressure to an element at a rotating axis July 31, 2001
A device for the supply of a liquid under pressure to a flow passage (13) in a member in a shaft suspension unit (1) of a centrifugal separator, which has a stationary casing (3) and a unit, which is resiliently and oscillation dampingly suspended in the casing (3) by at least one el
6247528 Plate heat exchanger June 19, 2001
The present invention concerns a plate heat exchanger for at least two heat exchanging fluids. The heat exchanger is permanently joined and includes at least one core of plates with corrugated heat exchanging plates (1-4) creating plate interspaces between one another, at least two end p
6230794 Method of producing heat transfer plates; an assortment of heat transfer plates; and a plate hea May 15, 2001
In a plate heat exchanger heat transfer plates abut against each other in such a way that heat transfer passages are formed therebetween, port holes provided in the heat transfer plates forming port channels through the plate heat exchanger. Between the heat transfer portion (15) of a he
6228016 Sealing device for a centrifugal separator May 8, 2001
A simple but still effective sealing device to separate two openings (4, 5), which are arranged at a distance from each other in the outer casing (3) of a shaft suspension unit (1), which supports a shaft (2) of a centrifugal separator in a bearing (8, 9), the shaft extending axially
6224533 Flexible metal supporting device for a centrifugal separator May 1, 2001
A flexible metal support device for a rotatable centrifuge rotor (2) provided in a frame member (1) by a bearing member (4). The support device comprises a support element (7) provided between the bearing member (4) and the frame member (1), and arranged to absorb relative movements
6217502 Centrifugal separator having a liquid filled transmission chamber April 17, 2001
In a centrifugal rotor (2) for freeing a liquid from solid particles suspended therein and being heavier than the liquid there is delimited a separation chamber (20), in which one or more conveyor screws (29) are arranged to supply separated particles axially along a surrounding wall
6200252 Reaction-driven centrifugal rotor with outlet chamber entrainment members March 13, 2001
In a reaction-driven centrifugal rotor the interior of its casing is divided into one separation chamber (11) and one outlet chamber (12). The separation chamber (11) has an inlet (8) for pressurized liquid to be treated in the centrifugal rotor, and the outlet chamber (12) has outlets
6183407 Centrifugal separator having axially-extending, angled separation discs February 6, 2001
In a rotor for a centrifugal separator there is delimited at one rotor end a distribution chamber (24) for a pressurized liquid supplied to the rotor for being cleaned from particles, and at the opposite rotor end there are liquid outlets arranged for reaction drive of the rotor. The liq
6176820 Connection device for a centrifugal separator January 23, 2001
The invention concerns a connection device for a centrifugal separator having a rotor (2) in a casing (1) and a tubular member (7) attached to the casing and forming an inlet passage for media supply into the rotor (2) and an outlet passage (9, 10) for media discharge therefrom. The
6168815 Method for continuous production of dry feed for fish and shell fish January 2, 2001
In a method for production of dry feed for fish or shell fish (Crustacea) based on fresh fish raw material, vegetable carbohydrate products together with other additives are added to give a carbohydrate content in the produced feed of at least 5% during feed production. During all proces
6165325 Vacuum vessel for continuous or semicontinuous treatment of fatty oils December 26, 2000
A vacuum vessel for continuous or semicontinuous treatment of fatty oils in connection with deodorization includes spaces through which the oil which is to be treated is brought to pass. The vessel also contains U-tubes used to heat or cool the oil and perforated pipes arranged at the bo
6164371 Plate heat exchanger for three heat exchanging fluids December 26, 2000
The present invention constitutes a plate heat exchanger for three heat exchanging fluids. The heat exchanger includes at least one core of plates with heat exchanging plates (1-4), at least two end plates (5) and inlets and outlets (6) for the heat exchanging fluids, each one of the hea
6162163 Centrifugal separator having a chamber with a deformable wall portion December 19, 2000
A centrifugal separator comprises a centrifuge rotor (1), which has a wall (10) defining an interior of the rotor (1) and which during operation of the centrifugal separator is rotatable about a rotational axis (y) with respect to a stationary pipe member (2) comprising at least one pass
6155574 Sealing device December 5, 2000
A sealing device (4) is provided for sealing between a first member (1) and a second member (2) and comprises a first sealing element (10), provided on the first member and extending thereabout towards the second member, and a second sealing element (20), provided on the second member an
6119766 Plate heat exchanger with connection pipes lined with bellows September 19, 2000
In a plate heat exchanger (1) comprising a package (3) of heat transfer plates (2) arranged between two frame plates at least one of the frame plates (6) is provided with connection pipes (9) for one or two heat exchange fluids. The connection pipes (9) are provided with internal lin
6117063 Apparatus and method to cool a bearing in a centrifugal separator September 12, 2000
The invention refers to a device and a method for cooling a bearing of a centrifugal separator. Through a portion (11, 21) adjacent to the bearing extends at least one channel (15, 23), which is arranged to receive a flow of a cooling medium and comprises at least two successive channel
6116332 Plate heat exchanger and a support arrangement for a plate heat exchanger September 12, 2000
A plate heat exchanger comprises a plate package (2) of heat transfer plates (3) provided with ports (12), which is arranged between two frame plates (4, 5), at least one (4) of the frame plates being provided with connection pipes (7). The invention concerns a support arrangement to
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