Abstract: A heat exchanger plate for use in a plate package for a heat exchanger device is disclosed. The plate has a geometrical main extension plane (q) and a circumferential edge portion, the circumferential edge portion having a curved upper portion, a substantially straight lower portion and two opposing side portions interconnecting the upper and the lower portions. An upper porthole is arranged in an upper section of the heat exchanger plate and located at a distance from the upper portion of the circumferential edge portion thereby defining an upper intermediate portion. The upper intermediate portion includes the shortest distance (d2) between a centre of the upper porthole and the upper portion of the circumferential edge portion. The heat exchanger plate further comprises an upper flange having an extension along the upper portion of the circumferential edge portion.

Abstract: A filtering unit includes a filtering component having a pre-filter chamber circumferentially compartmented in sectors, a filtering medium and a post-filtering chamber, a divider arranged coaxially with the filtering component and having distinct distribution columns, a cover and a rotary backwashing distributor having a shutter provided with a discharge opening. The rotary backwashing distributor is mounted to rotate so that the discharge opening is periodically and selectively put into communication with each distribution column. Each distribution column periodically and selectively establishes communication between the discharge opening and respective ones of the sectors. The filtering unit further includes a dividing plate arranged between the cover and the rotary backwashing distributor, the dividing plate being detachably secured with respect to the cover and having apertures opening into the distribution columns. The shutter abuts the dividing plate at least around the discharge opening.

Abstract: 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.

Abstract: A valve disc gasket for use in a fluid flow control valve includes a frustoconical, ring-shaped body part having a plurality of circumferentially distributed asymmetrical, through-going openings and/or slits and/or asymmetrical protrusions, wherein an internal surface of the respective asymmetrical through-going opening and/or slit forms a vane surface and/or wherein an external surface of the respective asymmetrical protrusion forms a vane surface, wherein the asymmetrical through-going openings and/or slits and/or protrusions are asymmetrical at least in the sense that respective through-going opening or slit and/or protrusion is asymmetric relative to any radial plane intersecting the respective through-going opening or slit and/or the respective protrusion. Also disclosed is a fluid flow control valve and a method for cleaning a fluid flow control valve.

Abstract: An exhaust gas cleaning system (1, 49, 77, 107), a method and a use are provided. The exhaust gas cleaning system is for cleaning exhaust gas (EG) onboard a ship and comprises an exhaust gas inlet (5, 79) for receiving the exhaust gas to be cleaned, and a scrubber (9, 51, 83) arranged to clean, in a scrubbing section (11, 53, 89) of the scrubber, the exhaust gas from pollutants. The scrubbing section comprises an exhaust gas inlet (19) for receiving the exhaust gas and an exhaust gas outlet (15, 57) for outputting the exhaust gas. The exhaust gas cleaning system further comprises a wet Electrostatic Precipitator (39) arranged to further clean the exhaust gas from pollutants after it has been cleaned in the scrubbing section.

Abstract: A wastewater treatment system and a wastewater treatment process, fluidly combining a one or more SBR (sequencing batch reactor) module/s, in which nitrification and denitrification of the wastewater are performed in sequences and one or more MBR (membrane bioreactor) module/s.

Abstract: A wastewater treatment system and a wastewater treatment process, fluidly combining a one or more SBR (sequencing batch reactor) module/s, in which nitrification and denitrification of the wastewater are performed in sequences and one or more MBR (membrane bioreactor) module/s.

Abstract: A syngas loop boiler includes a casing that surrounds a tube bundle, wherein the tube bundle includes a plurality of tubes. One end of each of the tubes is joined to a tube-sheet provided with corresponding tube-sheet inlet holes for inletting the syngas in the boiler, wherein each tube-sheet inlet hole is internally provided with at least a protective sleeve welded at both ends to corresponding surfaces of the tube-sheet inlet hole. Each tube-sheet inlet hole is provided with a first respective weld overlay placed at the inlet mouth of the tube-sheet inlet hole, so that a first end of each protective sleeve is welded to the first weld overlay. Each tube-sheet inlet hole is internally provided with at least a bore groove that contains a respective in-bore second weld overlay, so that the second end of the protective sleeve is welded to the in-bore second weld overlay.

Abstract: A plate for a heat exchange arrangement for the exchange of heat between a first and a second medium. The plate has a first heat transferring surface in contact with the first medium and a second heat transferring surface in contact with the second medium. The plate includes an inlet porthole for the first medium; an inlet porthole for the second medium, and an outlet porthole for the first medium. The first heat transferring surface includes a protrusion forming at least one ridge arranged to divide the heat transfer surface into at least a first region in direct thermal contact with the inlet porthole for the second medium, and a second region not in direct thermal contact with the inlet porthole for the second medium. The second region substantially surrounds the first region. The inlet porthole for the first medium is arranged in the first region, while the outlet porthole for the first medium is arranged in the second region.

Abstract: A separating disc adapted to be included in a disc package of a centrifuge rotor of a centrifugal separator adapted for separation of components in a supplied medium. The separating disc extends around an axis of rotation and has a tapering shape along the axis of rotation. The separating disc further includes a plurality of distance members, wherein each distance member is formed by a pressed marks extending radially. The separating disc is provided with a guiding arrangement including a number of index positions for providing indexing of the separating disc in the disc package in a rotational position. The number of index positions is different than the number of the plurality of distance members.

Abstract: A centrifugal separator includes a rotor, and a control system. The control system includes a first and a second pressure sensor arranged at first and second radial positions in a separation space of the rotor. The first and second pressure sensors are positioned to be submerged in process liquid during operation of the centrifugal separator. A control unit of the control system is configured to determine a parameter of the process liquid within the separation space during operation of the centrifugal separator based on measurements from the first and second pressure sensors.

Abstract: A plate heat exchanger and a method of manufacturing a plate heat exchanger are disclosed. The plate heat exchanger comprises plurality of plates, each comprising a central area with a corrugation of ridges and valleys extending between an upper level and a lower level. Each of four porthole areas comprises an annular flat area located at the upper or lower level. The plates comprise heat exchanger plates and an end plate. Each heat exchanger plate comprises four portholes through the respective porthole area. Each porthole area of the end plate is closed by a plate portion. A number of protrusions project from the annular flat area of the end plate to one of the lower level and the upper level. The protrusions, that project to the upper level, abut the annular flat area of the adjoining heat exchanger plate.

Abstract: A method for joining heat transfer plates, comprising: applying a melting depressant composition on individual application areas of a first metal sheet, each application area comprising a mid-section and two end-sections; pressing ridges and grooves in the metal sheet, the ridges extending in a direction that extends between the end-sections of the application areas, such that the application areas are located on top of the ridges; bringing the metal sheet into contact with a second, pressed metal sheet, such that contact points are formed where the mid-sections of the application areas re located; heating the sheets until melted metal is formed at the application areas where the melting depressant composition is applied; and allowing the melted metal to solidify such that a joint is obtained at the contact points.

Abstract: The invention relates to a centrifugal separator comprising a casing which delimits and seals off a space in which a rotor is arranged. The rotor forms a separation space which is sealed or isolated from the space, and in which separation space centrifugal separation of a higher density and a lower density component from a fluid takes place. An inlet extends into the rotor for introducing fluid to the separation space, and a first outlet extends from the rotor for discharge of a component separated from the fluid. The space is connected to a pump device which is arranged to remove gas, thereby maintaining negative pressure in said space. The rotor comprises at least one second outlet extending from the separation space to the space for discharge of at least one higher density component separated from the fluid. The invention also relates to a method in such a centrifugal separator.

Abstract: A method for joining a first metal part with a second metal part, the metal parts having a solidus temperature above 1100° C., includes applying a melting depressant composition on a surface of the first metal part, the melting depressant composition including a melting depressant component that includes at least 25 wt % boron and silicon for decreasing a melting temperature of the first metal part; bringing the second metal part into contact with the melting depressant composition at a contact point on said surface; heating the first and second metal parts to a temperature above 1100° C.; and allowing a melted metal layer of the first metal component to solidify, such that a joint is obtained at the contact point. The boron at least partly originates from a boron compound selected from any of the following compounds: boric acid, borax, titanium diboride and boron nitride. The melting depressant composition and related products are also described.

Abstract: A plate package for a heat exchanger device includes a plurality of heat exchanger plates of a first type and a plurality of heat exchanger plates of a second type. At least the heat exchanger plates of the first type include, along at least a section of the opposing side portions, a draining channel flange. The draining channel flanges are oriented in one and the same direction such that a draining channel flange of a first heat exchanger plate of the first type abuts or overlaps a draining channel flange of a subsequent heat exchanger plate. The draining channel flanges form outer walls to the outer draining portions thereby transforming the outer draining portions into draining channels. A method of using such plate package in a heat exchanger device and also a heat exchanger device as such are also disclosed.

Abstract: A wet surface air cooler (WSAC), including an evaporative spiral heat exchanger for flowing a process medium therethrough, a spray system for spraying a cooling medium directly onto the spiral heat exchanger and a fan for causing air to flow through the evaporative spiral heat exchanger, the combination of the sprayed cooling medium onto the evaporative spiral heat exchanger and the air flowing therethrough causes the cooling medium to at least partially evaporate to lower the temperature of the process medium.

Abstract: The present invention relates to a method and system of extracting an oil from an oil-containing raw material comprising the steps of providing a non-crushed oil-containing raw material, and treating the non-crushed oil-containing raw material. The treatment is performed by exposing the oil-containing raw material to vacuum, wherein the vacuum defines an absolute pressure of between 1 mm Hg and 150 mm Hg, and a temperature of between 0° C. and 45° C., and by subjecting the oil-containing raw material to crushing, simultaneously and/or subsequently to the step of exposing the oil-containing raw material to the vacuum, to provide a treated oil-containing raw material. By the method and system, high yield of oil with high quality can be obtained.

Abstract: An exchangeable separation insert and a modular centrifugal separator are disclosed. The insert includes a rotatable rotor casing and a first stationary portion. The rotor casing delimits a separation space and includes frustoconical separation discs. The first stationary portion is biased in a first direction away from the rotor casing along an axial direction.

Abstract: A heat transfer plate comprises a first distribution area having a first distribution pattern, a second distribution area having a second distribution pattern, and a heat transfer area having a heat transfer pattern differing from the first and second distribution patterns. The first and second distribution patterns comprise distribution ridges and distribution valleys. Distribution ridges and distribution valleys of the first and second distribution patterns closest to the heat transfer area form end ridges and end valleys. The top portion of at least plural of the end ridges, along at least part of its longitudinal extension, has a second width exceeding a first width of the top portion of the remaining distribution ridges, and the bottom portion of at least plural of the end valleys, along at least part of its longitudinal extension, has a fourth width exceeding a third width of the bottom portion of the remaining distribution valleys.