Patents by Inventor Li-Shiang Liang

Li-Shiang Liang 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).

  • Publication number: 20210162347
    Abstract: Methods of operating an electrochemical separation device is disclosed. The methods include operating the electrochemical separation device in an active mode until the resistance reaches a predetermined threshold, regenerating the electrochemical separation device in a passive mode until the resistance reaches a predetermined threshold, and resuming operation of the electrochemical separation device in the active mode. The methods also include operating the electrochemical separation device in an active mode for a predetermined period of time, regenerating the electrochemical separation device in a passive mode for a predetermined period of time, and resuming operation of the electrochemical separation device in the active mode. Water treatment systems include the electrochemical separation device and a control module are also disclosed. Methods of facilitating operation of the electrochemical separation device by providing a control sequence are also disclosed.
    Type: Application
    Filed: July 25, 2019
    Publication date: June 3, 2021
    Applicant: Evoqua Water Technologues LLC
    Inventors: Scott Waugh, Li-Shiang Liang, Frederick C. Wilkins, Charles P. Buzzel
  • Publication number: 20210139352
    Abstract: Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, for example, a cathode and an anode, a fluid channel defined between the concentric electrodes, a separator residing between the concentric electrodes, first and second end caps coupled to respective ends of the housing, and an inlet cone. The separators may be configured to localize the electrodes and dimensioned to minimize a zone of reduced velocity occurring downstream from the separator. The end caps and inlet cone may be dimensioned to maintain fully developed flow and minimize pressure drop across the electrochemical cell.
    Type: Application
    Filed: April 13, 2018
    Publication date: May 13, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, Andrew Green, Li-Shiang Liang, Paul Beddoes
  • Publication number: 20210107812
    Abstract: Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, a fluid channel defined between the concentric electrodes, and an electrical connector positioned at a distal end of a concentric electrode and electrically connected to the electrode. The electrical connectors may be configured to provide a substantially even current distribution to the concentric electrode and minimize a zone of reduced velocity occurring downstream from the electrical connector. The electrical connector may be configured to cause a temperature of an electrolyte solution to increase by less than about 0.5° C. while transmitting at least 100 W of power.
    Type: Application
    Filed: April 13, 2018
    Publication date: April 15, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Andrew Green, Li-Shiang Liang, Joshua Griffis, Paul Beddoes
  • Publication number: 20210047217
    Abstract: An electrochlorination system includes an electrolyzer fluidically connectable between a source of feed fluid and a product fluid outlet, and a sub-system configured to one of increase a pH of the feed fluid, or increase a ratio of monovalent to divalent ions in the feed fluid, upstream of the electrolyzer.
    Type: Application
    Filed: February 27, 2019
    Publication date: February 18, 2021
    Applicant: Evoqua Water Technolgies LLC
    Inventors: Joshua Griffis, Simon P. Dukes, LI-Shiang Liang, Darren Dale, Michael Shaw, Paul Beddoes, George Y. Gu
  • Publication number: 20210001276
    Abstract: An electrochemical separation device includes a first electrode, a second electrode, a cell stack including alternating depleting compartments and concentrating compartments disposed between the first electrode and the second electrode, an inlet manifold configured to introduce a fluid to one of the depleting compartments or the concentrating compartments an outlet manifold, and one or more of a fluid flow director disposed within the inlet manifold and having a surface configured to alter a flow path of the fluid introduced into the inlet manifold and direct the fluid into the one of the depleting compartments or the concentrating compartments, and a second fluid flow director disposed within the outlet manifold and having a surface configured to alter a flow path of the fluid introduced into the outlet manifold via one of the depleting compartments or the concentrating compartments.
    Type: Application
    Filed: June 20, 2018
    Publication date: January 7, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: Joshua Griffis, Li-Shiang Liang, William Lane, Simon P. Dukes, Kris Wy Loon LIM
  • Patent number: 10814280
    Abstract: A module comprises a cell stack having a plurality of alternating ion depleting compartments and ion concentrating compartments, an inlet manifold configured to facilitate a flow of fluid into the cell stack, and a first flow distribution system, associated with the inlet manifold, including a first ramp to promote the circulation of the flow of fluid into the cell stack.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: October 27, 2020
    Inventors: Joshua Griffis, Li-Shiang Liang
  • Patent number: 10808327
    Abstract: An electrochemical cell includes a cathode and an anode disposed in a housing. Each of the cathode and anode portions extending radially outward from a region proximate a central axis of the housing. A surface area of an active surface of the anode is greater than a surface area of an internal surface of the housing. A surface area of an active surface of the cathode is greater than a surface area of an internal surface of the housing.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: October 20, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Joshua W. Griffis, Li-Shiang Liang, Paul Beddoes, Andrew Green, Simon P. Dukes, Jacob Telepciak
  • Patent number: 10800678
    Abstract: An electrochlorination system comprising an electrochemical cell including a housing having an inlet, an outlet, and an anode-cathode pair disposed within the housing, a source of a chloride-containing aqueous solution having an outlet fluidly connectable to the inlet of the electrochemical cell, and a source of an oxidizing agent fluidly connectable to the source of chloride-containing aqueous solution upstream of the electrochemical cell.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: October 13, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Joseph D. Gifford, Joshua Griffis, Simon P. Dukes, Li-Shiang Liang, Michael J. Shaw, Frederick C. Wilkins
  • Publication number: 20200318246
    Abstract: An electrochemical cell includes a housing having an inlet, an outlet, and a central axis and an anode-cathode pair disposed concentrically within the housing about the central axis and defining an active area between an anode and a cathode of the anode-cathode pair. An active surface area of at least one of the anode and the cathode has a surface area greater than a surface area of an internal surface of the housing. The anode-cathode pair is configured and arranged to direct all fluid passing through the electrochemical cell axially through the active area.
    Type: Application
    Filed: December 23, 2019
    Publication date: October 8, 2020
    Applicant: Evoqua Water Technologies LLC
    Inventors: Paul Beddoes, Li-Shiang Liang, Andrew Green, Jacob Telepciak, Joshua W. Griffis, Simon P. Dukes
  • Publication number: 20200215489
    Abstract: A method of operating an electrochemical device includes periodically discharging a volume of concentrate reject in a timed batch cycle and replacing the concentrate reject with feed water. An electrochemical water treatment system includes a recycle line having a valve controlled by a control module. The control module periodically opens the valve to discharge concentrate reject from the recycle line in a batch timed cycle. The recycle line is fed with feed water to replace the discharged concentrate reject.
    Type: Application
    Filed: May 4, 2017
    Publication date: July 9, 2020
    Inventor: Li-Shiang Liang
  • Publication number: 20200198995
    Abstract: A method of providing water suitable for irrigation use includes feeding pre-treated water to an electrodialysis apparatus, treating the pre-treated water in the electrodialysis apparatus by selectively removing either one or both of monovalent anionic and monovalent cationic species from the pre-treated water while retaining either one or both of multivalent anionic and multivalent cationic species to produce a treated water stream having a lower ratio of monovalent ions to multivalent ions than the pre-treated water, and directing the treated water into an irrigation water distribution system.
    Type: Application
    Filed: May 8, 2018
    Publication date: June 25, 2020
    Applicant: Evoqua Water Technologies LLC
    Inventors: Gary C. GANZI, Fredreick C. WILKINS, Li-Shiang LIANG, Paul T. RICE
  • Patent number: 10662085
    Abstract: A low energy water treatment system and method is provided. The system has at least one electrodialysis device that produces partially treated water and a brine byproduct, a softener, and at least one electrodeionization device. The partially treated water stream can be softened by the softener to reduce the likelihood of scale formation and to reduce energy consumption in the electrodeionization device, which produces water having target properties. At least a portion of the energy used by the electrodeionization device can be generated by concentration differences between the brine and seawater streams introduced into compartments thereof. The brine stream can also be used to regenerate the softener.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 26, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Gary C. Ganzi, Li-Shiang Liang, Frederick C. Wilkins
  • Publication number: 20200129926
    Abstract: An electrochemical separation device includes a first electrode, a second electrode, and a cell stack including a plurality of sub-blocks each having alternating depleting compartments and concentrating compartments and each including frame and channel portions disposed between the first electrode and the second electrode. An internal seal formed of a first material is disposed between and in contact with the channel portions between adjacent sub-blocks in the cell stack and configured to prevent leakage between depleting compartments and concentrating compartments in the adjacent sub-blocks. An external seal formed of a second material having at least one material parameter different from the first material is disposed between and in contact with the frames of the adjacent sub-blocks in the cell stack and configured to prevent leakage from an internal volume of the electrochemical separation device to outside of the electrochemical separation device.
    Type: Application
    Filed: July 11, 2018
    Publication date: April 30, 2020
    Applicant: Evoqua Water Technologies LLC
    Inventors: Michael J. Muse, Joshua Griffis, LI-Shiang Liang, Michael Shaw, Simon P. Dukes
  • Patent number: 10561988
    Abstract: Electrochemical treatment devices for treating water and methods of assembling the devices are provided. Disclosed masking and potting techniques allow separate feeds to be delivered to and/or collected from the depleting compartments and concentrating compartments.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: February 18, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Li-Shiang Liang, Michael J. Muse
  • Patent number: 10513786
    Abstract: An electrochemical cell includes a housing having an inlet, an outlet, and a central axis and an anode-cathode pair disposed concentrically within the housing about the central axis and defining an active area between an anode and a cathode of the anode-cathode pair. An active surface area of at least one of the anode and the cathode has a surface area greater than a surface area of an internal surface of the housing. The anode-cathode pair is configured and arranged to direct all fluid passing through the electrochemical cell axially through the active area.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: December 24, 2019
    Assignee: Evoqua Water Technologies LLC
    Inventors: Paul Beddoes, Li-Shiang Liang, Andrew Green, Jacob Telepciak, Joshua W. Griffis, Simon P. Dukes
  • Publication number: 20190263697
    Abstract: A water treatment system for producing potable water and water for irrigation from saline water, the system includes an electrodialysis apparatus including one or more monovalent selective membranes and having an inlet fluidly connectable to a source of water to be treated, a diluate outlet, and a concentrate outlet, a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet fluidly connectable to the diluate outlet of the electrodialysis apparatus, a permeate outlet, and a retentate outlet, and an electrolyzer in fluid communication with one of the concentrate outlet and the retentate outlet, and configured to generate a product stream including one or more of chlorine gas, hypochlorite ion, sodium hydroxide, sulfuric acid, hydrochloric acid, or sodium hypochlorite.
    Type: Application
    Filed: February 27, 2019
    Publication date: August 29, 2019
    Applicant: Evoqua Water Technologies LLC
    Inventors: Gary C. Ganzi, Joahua Griffis, Simon Dukes, Li-Shiang Liang, Darren Adrian Dale, Michael Shaw, Paul Beddoes, George Gu
  • Patent number: 10301200
    Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distributor in the frame may enhance current efficiency. The flow distributor may define a labyrinth flow path for improved current efficiency.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 28, 2019
    Assignee: Evoqua Water Technologies LLC
    Inventor: Li-Shiang Liang
  • Patent number: 10252923
    Abstract: Water treatment systems including electrically-driven and pressure-driven separation apparatus configured to produce a first treated water suitable for use as irrigation water and a second treated water suitable for use as potable water from one of brackish water and seawater and methods of operation of same.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: April 9, 2019
    Assignee: Evoqua Water Technologies LLC
    Inventors: Gary C. Ganzi, Evgeniya Freydina, Anil D. Jha, Li-Shiang Liang, Frederick C. Wilkins
  • Patent number: 10189726
    Abstract: Electrically-driven separation systems and methods for use in oil recovery.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: January 29, 2019
    Assignee: Evoqua Water Technologies LLC
    Inventors: Rongqiang Fu, Li-Shiang Liang, Kee Hoe Ng
  • Patent number: D906621
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: December 29, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Krishna Kamath, Li-Shiang Liang, Donald W. Hindman