Patents by Inventor Fufang Zha
Fufang Zha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11524264Abstract: An aerator device and a filter system including the same are provided. The aerator device includes: a housing having an inner cavity defined therein, the housing including at least one sidewall and an upper surface connected to the at least one sidewall; a first partition formed within the inner cavity and extending from an upper end to a lower end to define a first cavity and a second cavity; and a second partition formed within the inner cavity between the first partition and a first sidewall of the at least one sidewall and extending from an upper end to a lower end to define a first chamber and a second chamber of the second cavity, and the housing includes an inlet opening communicating with the first cavity and an outlet opening communicating with the second chamber, and the second chamber gradually narrows towards the upper surface of the housing.Type: GrantFiled: December 31, 2014Date of Patent: December 13, 2022Assignees: LOTTE CHEMICAL CORPORATION, LOTTE ADVANCED MATERIALS CO., LTD.Inventors: Ji Hye Kim, Fufang Zha, Young Lim Koo, Gyu Hong Min, Hyoung Wook Ahn, Byung Kook Hwang
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Patent number: 10828607Abstract: An aerator device, a filter system including an aerator device, and a method of aerating a filter using an aerator device. An aerator device includes a housing having an interior cavity; a first plate in the interior cavity and defining a first cavity portion and a second cavity portion thereof, the first plate being spaced apart from a top wall of the housing to define a first opening through which the first cavity portion and the second cavity portion are in communication; and a second plate defining a first chamber and a second chamber of the second cavity portion, the first chamber and the second chamber being in communication with each other below a lower end of the second plate, the housing having an inlet opening in communication with the first cavity portion, and an outlet opening through the top wall and in communication with the second chamber.Type: GrantFiled: March 15, 2013Date of Patent: November 10, 2020Assignee: Lotte Chemical CorporationInventors: Gyu Hong Min, Jin Min Kim, Young Lim Koo, Byung Kook Hwang, Daniel Eumine Suk, Jong Sang Park, Fufang Zha, Jihye Kim
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Publication number: 20200078741Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: ApplicationFiled: October 25, 2019Publication date: March 12, 2020Applicant: Evoqua Water Technologies LLCInventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Patent number: 10507431Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: GrantFiled: January 10, 2017Date of Patent: December 17, 2019Inventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Patent number: 9764288Abstract: In accordance with aspects and embodiments, a filtration system is provided comprising a membrane module comprising an upper header and a lower header, a plurality of hollow fiber membranes having an upper end potted in the upper header and a lower end potted in the lower head, a cage at least partially surrounding the plurality of hollow fiber membranes, and a screen in contact with and surrounding the cage, the filtration system further comprising an aeration cap coupled to the lower header of the membrane module. The screen may protect the hollow fiber membranes from damage from coarse contaminants contained in the feed liquid, may improve module integrity, and may improve the efficiency of the filtration system.Type: GrantFiled: March 15, 2013Date of Patent: September 19, 2017Assignee: Evoqua Water Technologies LLCInventors: Warren T. Johnson, Thomas W. Beck, Fufang Zha, Zhiyi Cao, Jessica Stiller, Bruce Biltoft
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Patent number: 9675936Abstract: A hollow fiber membrane module including at least two types of hollow fiber membranes having different inner diameters, comprising first hollow fiber membranes and second hollow fiber membranes, and the equation |PA?P0|?|PB?P0| where P0 is an initial pressure applied to upper open ends of the first and second hollow fiber membranes, and PA and PB are respective pressures at lower open ends of the first and second hollow fiber membranes.Type: GrantFiled: December 27, 2013Date of Patent: June 13, 2017Assignees: Lotte Chemical Corporation, Lotte Advanced Materials Co., Ltd.Inventors: Gyu Hong Min, Fufang Zha
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Patent number: 9675938Abstract: A method of cleaning a porous polymeric membrane having a feed side and a permeate side including the steps of introducing a fluid containing a cleaning agent to the permeate side of a membrane allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane, or introducing a fluid containing a cleaning agent to the feed side of a membrane; applying a transmembrane pressure to force the fluid containing the cleaning agent from the feed side to the permeate side of the membrane; allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane. Preferably a concentration gradient between the feed side fluid and the lumen side fluid containing the cleaning agent causes cleaning agent to diffuse into the feed side fluid. Pressure may be applied to the fluid containing a cleaning agent to dislodge, where present, dissolved and undissolved solid from the membrane pores.Type: GrantFiled: April 28, 2006Date of Patent: June 13, 2017Assignee: Evoqua Water Technologies LLCInventors: Fufang Zha, Zhiyi Cao
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Publication number: 20170113188Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: ApplicationFiled: January 10, 2017Publication date: April 27, 2017Inventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Patent number: 9206057Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: GrantFiled: February 11, 2014Date of Patent: December 8, 2015Assignee: Evoqua Water Technologies LLCInventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Publication number: 20150182919Abstract: An aerator device and a filter system including the same are provided. The aerator device includes: a housing having an inner cavity defined therein, the housing including at least one sidewall and an upper surface connected to the at least one sidewall; a first partition formed within the inner cavity and extending from an upper end to a lower end to define a first cavity and a second cavity; and a second partition formed within the inner cavity between the first partition and a first sidewall of the at least one sidewall and extending from an upper end to a lower end to define a first chamber and a second chamber of the second cavity, and the housing includes an inlet opening communicating with the first cavity and an outlet opening communicating with the second chamber, and the second chamber gradually narrows towards the upper surface of the housing.Type: ApplicationFiled: December 31, 2014Publication date: July 2, 2015Inventors: Ji Hye KIM, Fufang ZHA, Young Lim KOO, Gyu Hong MIN, Hyoung Wook AHN, Byung Kook HWANG
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Patent number: 8956464Abstract: Methods for cleaning polymeric microfiltration or ultrafiltration membranes. The membrane may be contacted with a first cleaning solution including at least one oxidising agent. A second cleaning solution including at least one reducing agent may then be introduced to the membrane and first cleaning solution. The oxidising and reducing agents may undergo a neutralisation reaction to form an oxidation-neutral mixed cleaning solution. The membrane may be simultaneously cleaned during the neutralisation reaction.Type: GrantFiled: June 11, 2010Date of Patent: February 17, 2015Assignee: Evoqua Water Technologies LLCInventors: Peter Zauner, Fufang Zha
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Patent number: 8840783Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: GrantFiled: February 12, 2013Date of Patent: September 23, 2014Assignee: Evoqua Water Technologies LLCInventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Patent number: 8790515Abstract: A method of filtering solids from a liquid suspension comprising providing a pressure differential across the walls of permeable, hollow membranes (5) immersed in the liquid suspension contained in a vessel (8), the liquid suspension being applied to the outer surface of the porous hollow membrane (5) to induce and sustain filtration through the membrane walls. Some of the liquid suspension passes through the walls of the membranes (5) to be drawn off as permeate from the hollow membrane lumens, and at least some of the solids are retained on or in the hollow membranes or otherwise as suspended solids within the liquid surrounding the membranes (5).Type: GrantFiled: September 7, 2005Date of Patent: July 29, 2014Assignee: Evoqua Water Technologies LLCInventors: Fufang Zha, Zhiyi Cao
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Publication number: 20140183123Abstract: A hollow fiber membrane module including at least two types of hollow fiber membranes having different inner diameters, comprising first hollow fiber membranes and second hollow fiber membranes, and the equation |PA?P0?|PB?P0| where P0 is an initial pressure applied to upper open ends of the first and second hollow fiber membranes, and PA and PB are respective pressures at lower open ends of the first and second hollow fiber membranes.Type: ApplicationFiled: December 27, 2013Publication date: July 3, 2014Applicant: CHEIL INDUSTRIES INC.Inventors: Gyu Hong MIN, Fufang ZHA
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Publication number: 20140158618Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: ApplicationFiled: February 11, 2014Publication date: June 12, 2014Inventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Publication number: 20140083940Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: ApplicationFiled: November 26, 2013Publication date: March 27, 2014Applicant: Siemens Water Technologies LLCInventors: Fufang Zha, Gerin James, Joseph E. Zuback, Peter Zauner, Roger W. Phelps
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Publication number: 20140076806Abstract: An aerator device, a filter system including an aerator device, and a method of aerating a filter using an aerator device. An aerator device includes a housing having an interior cavity; a first plate in the interior cavity and defining a first cavity portion and a second cavity portion thereof, the first plate being spaced apart from a top wall of the housing to define a first opening through which the first cavity portion and the second cavity portion are in communication; and a second plate defining a first chamber and a second chamber of the second cavity portion, the first chamber and the second chamber being in communication with each other below a lower end of the second plate, the housing having an inlet opening in communication with the first cavity portion, and an outlet opening through the top wall and in communication with the second chamber.Type: ApplicationFiled: March 15, 2013Publication date: March 20, 2014Applicant: CHEIL INDUSTRIES INC.Inventors: Gyu Hong MIN, Jin Min KIM, Young Lim KOO, Byung Kook HWANG, Daniel Eumine SUK, Jong Sang PARK, Fufang ZHA, Jihye KIM
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Patent number: 8652331Abstract: A method of backwashing a membrane filtration system comprising at least one permeable membrane, preferably a hollow fiber membrane, the method comprising the step of applying a pressurized gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. Also provided are methods of filtering solids from a liquid suspension using alternating liquid backwash pressures.Type: GrantFiled: August 17, 2009Date of Patent: February 18, 2014Assignee: Siemens Water Technologies LLCInventors: Fufang Zha, Zhiyi Cao
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Patent number: 8622222Abstract: A method of cleaning a membrane surface immersed in a liquid medium with a fluid flow, including the steps of providing a randomly generated intermittent or pulsed fluid flow along the membrane surface to dislodge fouling materials therefrom. A membrane module is also disclosed comprising a plurality of porous membranes (6) or a set of membrane modules (5) and a device (11) for providing a generally randomly generated, pulsed fluid flow such that, in use, said fluid flow moves past the surfaces of said membranes (6) to dislodge fouling materials therefrom.Type: GrantFiled: May 29, 2008Date of Patent: January 7, 2014Assignee: Siemens Water Technologies LLCInventors: Fufang Zha, Gerin James, Joseph Edward Zuback, Peter Zauner, Roger William Phelps
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Publication number: 20130264251Abstract: In accordance with aspects and embodiments, a filtration system is provided comprising a membrane module comprising an upper header and a lower header, a plurality of hollow fiber membranes having an upper end potted in the upper header and a lower end potted in the lower head, a cage at least partially surrounding the plurality of hollow fiber membranes, and a screen in contact with and surrounding the cage, the filtration system further comprising an aeration cap coupled to the lower header of the membrane module. The screen may protect the hollow fiber membranes from damage from coarse contaminants contained in the feed liquid, may improve module integrity, and may improve the efficiency of the filtration system.Type: ApplicationFiled: March 15, 2013Publication date: October 10, 2013Applicant: SIEMENSInventors: Warren T. Johnson, Thomas W. Beck, Fufang Zha, Zhiyi Cao, Jessica Stiller, Bruce Biltoft