Patents Assigned to Nordic Water Products AB
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Patent number: 11679344Abstract: A cleaning system for cleaning a lamella plate settler includes at least one mechanical cleaning device; a suspension device adapted to suspend the mechanical cleaning device; wherein the suspension device includes a displacement device for lowering and raising the at least one mechanical cleaning device for mechanical cleaning of a lamella plate positioned below the cleaning system. By providing a frame supporting the at least one cleaning device; wheels attached to the frame and adapted to move on rails, the wheels including driving wheels and non-driving wheel, and a sensor, preferably an inductive sensor, adapted to sense the rotational position of the driving wheels, the lamella plate settler can be automatically be cleaned without emptying the basin of water, thus allowing cleaning during operation. A lamella plate settler and a method of cleaning a lamella plate are also provided.Type: GrantFiled: May 8, 2019Date of Patent: June 20, 2023Assignee: NORDIC WATER PRODUCTS ABInventors: Lars Apelqvist, Daniel Jansson
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Patent number: 11517834Abstract: The present invention relates to a fabric disc filter having a structure for preventing damage to a filter panel. In this regard, an object of the present invention is to provide a fabric disc filter having a structure for preventing damage to filter panel, being capable of preventing the filter panel attached to the filter panel from being torn or being disconnected from the filter frame in the washing process of suctioning and removing foreign matter.Type: GrantFiled: February 21, 2019Date of Patent: December 6, 2022Assignee: NORDIC WATER PRODUCTS ABInventor: Chan Yong Moon
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Publication number: 20220161164Abstract: In a filter element for use in a filter disc, a plurality of filter elements are arranged on a rotor shaft in a manner allowing liquid communication between the inside of the filter elements and the inside of the rotor shaft. The filter element has at least one passage in an edge structure for liquid communication between the inside of adjacent filter elements when the filter elements are assembled forming a filter disc. The passage has an elevated retention edge extending along at least one edge of the passage. Transportation of particles between filter elements in a disc filter is thereby minimized.Type: ApplicationFiled: August 17, 2020Publication date: May 26, 2022Applicant: NORDIC WATER PRODUCTS ABInventor: Nils-Åke PERSSON
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Publication number: 20210236962Abstract: A cleaning system for cleaning a lamella plate settler includes at least one mechanical cleaning device; a suspension device adapted to suspend the mechanical cleaning device; wherein the suspension device includes a displacement device for lowering and raising the at least one mechanical cleaning device for mechanical cleaning of a lamella plate positioned below the cleaning system. By providing a frame supporting the at least one cleaning device; wheels attached to the frame and adapted to move on rails, the wheels including driving wheels and non-driving wheel, and a sensor, preferably an inductive sensor, adapted to sense the rotational position of the driving wheels, the lamella plate settler can be automatically be cleaned without emptying the basin of water, thus allowing cleaning during operation. A lamella plate settler and a method of cleaning a lamella plate are also provided.Type: ApplicationFiled: May 8, 2019Publication date: August 5, 2021Applicant: NORDIC WATER PRODUCTS ABInventors: Lars APELQVIST, Daniel JANSSON
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Patent number: 10913016Abstract: A filter element for use in a filter disc, wherein a plurality of filter elements are arranged on a rotor shaft in a manner allowing liquid communication between the inside of the filter elements and the inside of the rotor shaft. The filter element has at least one passage in an edge structure for liquid communication between the inside of adjacent filter elements when the filter elements are assembled forming a filter disc. The passage has different passage area along the edge structure.Type: GrantFiled: December 13, 2018Date of Patent: February 9, 2021Assignee: NORDIC WATER PRODUCTS ABInventor: Stuart Lee
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Publication number: 20210008473Abstract: The present invention relates to a fabric disc filter having a structure for preventing damage to a filter panel. In this regard, an object of the present invention is to provide a fabric disc filter having a structure for preventing damage to filter panel, being capable of preventing the filter panel attached to the filter panel from being torn or being disconnected from the filter frame in the washing process of suctioning and removing foreign matter.Type: ApplicationFiled: February 21, 2019Publication date: January 14, 2021Applicant: NORDIC WATER PRODUCTS ABInventor: Chang Yong MOON
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Patent number: 10807023Abstract: A method and a plant for the treatment of water or wastewater having impurities by filtration of the water through two granular media filter stages of the moving bed type operated in series. The method includes the steps of feeding the water/wastewater as a first influent to first stage granular media filters; filtration of the first influent in the first stage granular media filters to produce a first effluent; feeding the first effluent as a second influent to second stage granular media filters; and filtration of the second influent in the second stage granular media filters to produce a second effluent. The second stage granular media filters are operated with intermittent washing of the granular filter media.Type: GrantFiled: May 9, 2014Date of Patent: October 20, 2020Assignee: Nordic Water Products ABInventor: Hans F. Larsson
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Patent number: 10220335Abstract: A filter element for use in a filter disc, wherein a plurality of filter elements are arranged on a rotor shaft in a manner allowing liquid communication between the inside of the filter elements and the inside of the rotor shaft. The filter element has at least one passage in an edge structure for liquid communication between the inside of adjacent filter elements when the filter elements are assembled forming a filter disc. The passage has different passage area along the edge structure.Type: GrantFiled: September 12, 2017Date of Patent: March 5, 2019Assignee: NORDIC WATER PRODUCTS ABInventor: Stuart Lee
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Publication number: 20170050124Abstract: A lamella settler (1) comprises a basin (10) with an inlet for liquid to be cleaned and a sludge outlet and with a plurality of outlet openings (12) for cleaned liquid. Each of a plurality of outlet flumes (16)connects to one of the plurality of outlet openings (12). A plurality of lamella plates are (18) attached to adjacent flumes (16). By providing a plurality of transverse beams (14) above the basin (10), wherein the outlet flumes (16) are supported by the beams (14), an improved lamella settler is achieved which is easier to manufacture and assemble and which has improved characteristics.Type: ApplicationFiled: April 29, 2015Publication date: February 23, 2017Applicant: Nordic Water Products ABInventor: Mattias FELDTHUSEN
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Patent number: 8852434Abstract: A filter element (2) for use in a disc filter (1), wherein a plurality of filter elements (2) are arranged on a rotor shaft (3) in a manner allowing liquid communication between the inside (4) of the filter elements (2) and the inside (5) of the rotor shaft (3), for the filtering of liquids. The filter element (2) includes a framework (6) carrying a filter cloth (7) on both its side surfaces (8), wherein the framework (6) and the filter cloth (7) are permanently joined forming a single use filter element (2) and the filter element has at least one passage (21) in each edge (22) for liquid communication between the inside (4) of adjacent filter elements. A disc filter (1) including a single use filter element (2) is also provided.Type: GrantFiled: February 17, 2009Date of Patent: October 7, 2014Assignee: Nordic Water Products ABInventors: Hans F. Larsson, Kjell Gustafsson
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Publication number: 20140246388Abstract: A method and a plant for the treatment of water or wastewater having impurities by filtration of the water through two granular media filter stages of the moving bed type operated in series. The method includes the steps of feeding the water/wastewater as a first influent to first stage granular media filters; filtration of the first influent in the first stage granular media filters to produce a first effluent; feeding the first effluent as a second influent to second stage granular media filters; and filtration of the second influent in the second stage granular media filters to produce a second effluent. The second stage granular media filters are operated with intermittent washing of the granular filter media.Type: ApplicationFiled: May 9, 2014Publication date: September 4, 2014Applicant: Nordic Water Products ABInventor: Hans F. Larsson
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Publication number: 20130011274Abstract: A method for supplying compressed air for the operation of moving bed filters by way a compressor is characterized by controlling the pressure of compressed air from the compressor by controlling the rotational speed of the compressor. A system for supplying compressed air is also provided. By use of the described method and system, substantial energy savings of approximately 50 percent can be achieved.Type: ApplicationFiled: February 11, 2011Publication date: January 10, 2013Applicant: NORDIC WATER PRODUCTS ABInventor: Hans F. Larsson
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Publication number: 20110024347Abstract: A filter element (2) for use in a disc filter (1), wherein a plurality of filter elements (2) are arranged on a rotor shaft (3) in a manner allowing liquid communication between the inside (4) of the filter elements (2) and the inside (5) of the rotor shaft (3), for the filtering of liquids. The filter element (2) includes a framework (6) carrying a filter cloth (7) on both its side surfaces (8), wherein the framework (6) and the filter cloth (7) are permanently joined forming a single use filter element (2) and the filter element has at least one passage (21) in each edge (22) for liquid communication between the inside (4) of adjacent filter elements. A disc filter (1) including a single use filter element (2) is also provided.Type: ApplicationFiled: February 17, 2009Publication date: February 3, 2011Applicant: NORDIC WATER PRODUCTS ABInventors: Hans F. Larsson, Kjell Gustafsson
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Patent number: 7410568Abstract: An apparatus for treating sludge, comprises a press for dewatering the sludge, a compaction device for receiving and compacting sludge dewatered by the press, a shredder for receiving and shredding sludge compacted by the compaction device, and a tube conveyor for conveying shredded sludge from the shredder. The press is controlled to vary the flow rate of the sludge in response to at least one sensed operational parameter of the press, such as the momentary power for operating the press, pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.Type: GrantFiled: January 4, 2008Date of Patent: August 12, 2008Assignee: Nordic Water Products ABInventor: Jesper Christopherson
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Publication number: 20080099384Abstract: An apparatus for treating sludge, comprises a press for dewatering the sludge, a compaction device for receiving and compacting sludge dewatered by the press, a shredder for receiving and shredding sludge compacted by the compaction device, and a tube conveyor for conveying shredded sludge from the shredder. The press is controlled to vary the flow rate of the sludge in response to at least one sensed operational parameter of the press, such as the momentary power for operating the press, pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.Type: ApplicationFiled: January 4, 2008Publication date: May 1, 2008Applicant: NORDIC WATER PRODUCTS ABInventor: Jesper Christopherson
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Patent number: 7335311Abstract: An apparatus for treating sludge, comprises a press for dewatering the sludge, a compaction device for receiving and compacting sludge dewatered by the press, a shredder for receiving and shredding sludge compacted by the compaction device, and a tube conveyor for conveying shredded sludge from the shredder. The press is controlled to vary the flow rate of the sludge in response to at least one sensed operational parameter of the press, such as the momentary power for operating the press, pressure in the sludge in the press, sludge concentration in the press, sludge feed flow to the press or separated water flow from the press.Type: GrantFiled: October 13, 2004Date of Patent: February 26, 2008Assignee: Nordic Water Products ABInventor: Jesper Christophersson
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Patent number: 6899231Abstract: A settling device (1) for liquid treatment including a plurality of inclined, spaced-apart panels (5) each providing an upper settling surface for receiving settled out solid contents of the liquid to be treated, wherein the panels (5) are supported in a box-like structure (2,3,4) including two side walls, and wherein said device includes an inlet or inlets for liquid to be treated and an outlet or outlets for purified liquid. At least one of the side wall sides of the box-like structure (2,3,4) is provided, at the top, with a top portion to be positioned vertically so as to obtain a purified liquid level inside the device between a low level which is below a upper portion of the inclined panels and a high level which is above said upper portion of the panels.Type: GrantFiled: November 22, 2002Date of Patent: May 31, 2005Assignee: Nordic Water Products ABInventor: Hans F. Larsson
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Patent number: 6065608Abstract: An apparatus for filtering liquids comprises a hollow body which is rotatable about a horizontal axis. Liquid to be filtered is supplied into the interior of the rotating hollow body so that filtrate flows by gravity through filter material of the hollow body into a filtrate container. A sealing structure seals between a stationary circumferential wall, which defines a liquid supplying chamber, and a circumferential liquid impervious wall of the hollow body. Wall structures are arranged to prevent unfiltered liquid leaking past the sealing structure from entering the filtrate container.Type: GrantFiled: February 10, 1999Date of Patent: May 23, 2000Assignee: Nordic Water Products ABInventor: Rune H Frykhult
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Patent number: 5804071Abstract: A rotating disc filter for separating coarse phase from a liquid mixture having carrier elements and blocking means that prevent the coarse phase from falling back into the pool of incoming liquid mixture. The capacity of the filter is increased by the prevention of the coarse phase from being filtered again and thereby occupying filter area.Type: GrantFiled: September 20, 1996Date of Patent: September 8, 1998Assignee: Nordic Water Products ABInventor: Roger Haeffner
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Patent number: D606621Type: GrantFiled: August 26, 2008Date of Patent: December 22, 2009Assignee: Nordic Water Products ABInventors: Hans F. Larsson, Kjell Gustafsson