Alfa Laval

Lund, Sweden

Alfa Laval

Lund, Sweden
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Patent
Alfa Laval | Date: 2017-03-29

A centrifugal separator (1) for separation of liquid particles from a gas stream, comprising a stationary frame (2), a gas inlet (3) and a gas outlet (4). The frame comprises a tubular element (24) defining a rotor space inside itself and a liquid transportation space (39) outside the tubular element. A centrifugal rotor (5) is arranged in the rotor space and rotatably supported in the frame around a rotational axis (x) and comprising a separation means (6). A stationary device (10) is configured to bring the gas stream in rotation, thereby bringing the rotor (5) into rotation. At least one opening (40, 41) is provided in the tubular element, between the rotor space and the liquid transportation space, for conducting liquid separated from the gas stream from the rotor space to the liquid transportation space.


Patent
Alfa Laval | Date: 2017-03-15

A valve controller (10) for controlling a valve (12) is disclosed. The valve controller has an actuator (14) and a flow controlling unit (16). The valve controller (10) is configured to execute a setup process and comprises a first pilot valve (24) that can energize the actuator by allowing a first pressurized fluid to enter the actuator and deenergizing the actuator by allowing the fluid to leave the actuator. The valve controller (10) further has an input device (66) by which the setup process can be initiated, and a memory unit (64) for storing setup parameter values. The setup process comprises: determining (102) one or more parameter values indicative of the functionality of at least one of the valve controller (10), the actuator and the flow controlling unit (16), and storing (104) the one or more parameter values as one or more setup parameter values in the memory unit (64).


Patent
Alfa Laval | Date: 2017-01-04

A plate heat exchanger comprising a casing (2), a fluid separation device (40), a number of heat transfer plates (21-23) that are permanently joined to each other and have central openings (31) that that form a central space (24) in the plate stack (20) and in which the fluid separation device (40) is arranged, such that a first part (34) of the central opening (31) may act as a fluid inlet and a second part (35) of the central opening (31) may act as a fluid outlet for a first fluid (F1), opposite sides (36, 37) of the plates (21-23) act fluid entries and exits for a second fluid (F2), wherein two end plates (71, 72) have central through holes (73, 74) the ends of the plate stack (20), each of the end plates (71, 72) being thicker than the heat transfer plates (21-23), providing increased mechanical support for the plate stack (20), and having a slower thermal expansion.


Patent
Alfa Laval | Date: 2017-01-04

A plate heat exchanger comprising a casing, a fluid separation device, a number of heat transfer plates that are permanently joined to each other and have central openings (31) that that form a central space in a plate stack (20) and in which the fluid separation device is arranged, such that a first part of the central opening (31) may act as a fluid inlet and a second part of the central opening (31) may act as a fluid outlet for a first fluid, opposite sides (36, 37) of the plates act fluid entries and exits for a second fluid, an outer dimension (D1) of the plate stack (20) is smaller than an inner dimension (D2) of a shell (3) of the casing (2), wherein fluid blockers (51, 52) are arranged in a gap (50) between the shell (3) and the plate stack (20).


Patent
Alfa Laval | Date: 2017-03-15

A valve controller (10) for controlling a valve (12) that comprises an actuator (14) and a flow controlling unit (16) is disclosed. The valve controller (10) comprises equipment for controlling the function of at least one of the actuator (14) and the flow controlling unit (15). The valve controller (10) is further configured to obtain (100) one or more first parameter values indicative of a functionality of the equipment at startup of the valve controller (10). The valve controller (10) is configured to monitor (200) the equipment during operation of the valve controller for determining one or more second parameter values indicative of the functionality of the equipment and determining (210) if a change in functionality of the equipment has occurred based on a comparison of the one or more second parameter values with the one or more first parameter values.


Patent
Alfa Laval | Date: 2017-04-05

A heat transfer plate that has a base plate (40); a fluid distribution plate (50) that is arranged on a first end section of the base plate (40), and a fluid collection plate (50) that is arranged on a second end section of the base plate (40), the fluid distribution plate (50) comprising a base edge that faces a heat transfer section (43) of the base plate (40), a distal part that is located at a distance from the base edge, a fluid passage edge that comprises an extension in a direction from the base edge, towards the distal part, a closed edge that comprises an extension in the direction from the base edge, towards the distal part, and fluid distribution channels that extend from the fluid passage edge to the base edge, for leading fluid (F1) from the fluid passage edge to the heat transfer section.


Patent
Alfa Laval | Date: 2017-01-04

Herein a centrifugal separator structure (4) configured for cleaning of crankcase gases from an internal combustion engine is disclosed. The centrifugal separator structure (4) comprises a separator rotor (10) configured for rotation about a centre axis (22) arranged inside a stationary housing (8). The separator rotor (10) comprises an axle member (9) configured for connection to a shaft of a driving device. A stack (18) of separation discs (20) is supported on the axle member (9). Further an assembly comprising a centrifugal separator structure (4) and a driving device is disclosed herein.


Patent
Alfa Laval | Date: 2017-01-04

A valve arrangement (100) comprises a valve (1) and a valve controller (2) configured to execute a configuration phase. In this phase, the valve controller (2) controls an actuator (11) to set a flow controlling element (7) of the valve (1) in predefined first and second states and acquires first and second nominal position values (P1, P2) for the first and second states from a position sensor (26) associated with the valve (1). Based on the first and second nominal position values (P1, P2), the valve controller (2) assigns the valve to a specific valve type and selects a validation criterion for the valve (1) based on valve type. During a subsequent flow control phase, the valve controller (2) may evaluate the validation criterion and generate a status signal to indicate an error status if the validation criterion is violated. The validation criterion may define an acceptable range of position values for the flow controlling element while the flow controlling element is in one of the first and second states.


Patent
Alfa Laval | Date: 2017-09-13

A liquid ejection apparatus (100) for cleaning of a tank (40). The liquid ejection apparatus (100) comprising: a base member (105) having a first end (105a) for receiving the liquid (L) from a liquid line (101), a rotary head (106) that is rotatably connected to the base member (105) and a rotary nozzle hub (110) that is rotatably connected to the rotary head (106). The rotary nozzle hub (110) comprises a primary liquid ejection nozzle (112) for ejecting a liquid (L) in a pattern towards an interior surface (41) of the tank (40). The primary liquid ejection nozzle (112) has an outer, concave surface (112s) that faces the rotary head (106).


Patent
Alfa Laval | Date: 2017-09-27

A hook assembly for connecting a first part (101) of a heat exchanger (100) to a second part (102) of the heat exchanger (100), comprising a first hook device (1) that acts on the first part (101), and a second hook device (2) that acts on the second part (102) for pressing the first and second parts (101, 102) towards each other, wherein an elongated bar (3) extends through the first and second hook devices (1, 2), a first nut (4) is attached to the elongated bar (3) and abuts the first hook device (1) for fixing it relative the first part (101) of the heat exchanger (100), and a second nut (5) is attached to the elongated bar (3) and abuts the second hook device (2) for fixing it relative the second part (102) of the heat exchanger (100).

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