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Apparatus and method for improving gas backwash in lateral underdrains

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • B01D-024/46
출원번호 US-0596548 (1996-02-05)
발명자 / 주소
  • Brown Marvin A. (Sewickley PA) Bergmann Eugen O. (Evans City PA) Hsieh Richard (Sewickley PA)
출원인 / 주소
  • The F.B. Leopold Company (Zelienople PA 02)
인용정보 피인용 횟수 : 33  인용 특허 : 25

초록

An apparatus and method for gas backwashing a granular media supported upon a lateral underdrain is disclosed. The lateral underdrain includes a plurality of dispersion apertures therethrough and at least one liquid return conduit extending to a discharge at a level below the dispersion apertures. T

대표청구항

A method of backwashing a filter media comprising supplying a gas under pressure into an underdrain block submerged in a process liquid, forming a pocket of pressurized gas in the liquid below an upper wall of the underdrain block, said upper wall containing dispersion apertures, passing pressurized

이 특허에 인용된 특허 (25)

  1. Brown Marvin A. (Sewickley PA), Air duct block for air/water underdrain systems in gravity filters.
  2. Davis Thomas A. (Annandale NJ) Bozenmayer Kurt (West Milford NJ) Butterworth Donald J. (Stirling NJ), Air/water distributor underdrain.
  3. Brown Marvin A. (Sewickley PA) Bergmann Eugen O. (Evans City PA) Hsieh Richard (Zelienopie PA), Apparatus and method for improving gas backwash in lateral underdrains.
  4. Maxson Richard C. (Maple Grove MN), Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system.
  5. Brown Marvin A. (Allegheny County PA) Wolfe Gerald D. (Butler County PA) Beverly Richard P. (Butler County PA), Cap for underdrains in gravity filters.
  6. Brown Marvin A. (Sewickley PA) Wolfe Gerald D. (Zeliepnople PA) Beverly Richard P. (Butler PA), Cap for underdrains in gravity filters.
  7. Brown Marvin A. (Sewickley PA) Beverly Richard P. (Clackamas OR), Cap system for underdrains in gravity filters.
  8. Moore Richard P. (Germiston ZAX), Distribution filter nozzles and filters incorporating same.
  9. Heaney Donald F. (Pittsburgh PA) Boal Delbert L. (Pittsburgh PA), Filter bottom.
  10. Hambley John B. (4232-16A Street S.E. Calgary ; Alberta CAX T2G 3V1), Filter underdrain apparatus with partitioned distributor conduits.
  11. Berkebile Dean T. (Mars PA) Wolfe Gerald D. (Zelienople PA), Filter underdrain block.
  12. San Roman ; Guillermo A., Filtering apparatus for liquids.
  13. Farabaugh Patrick (Dallas TX), Fluid distributor.
  14. Brown Marvin A. (Sewickley PA), Flume distribution system with removable block.
  15. Louboutin Robert (Crespieres FRX) Riotte Michel (Garches FRX), Liquid filter device.
  16. Soriente Alfonse J. (Westfield NJ), Low profile underdrain strainer assembly with improved distribution/fastening means.
  17. Gaudin Marie-Pierre (Saint Germain en Laye FRX) Meindre Daniel (Rueil Malmaison FRX) Savall Vincent (Velizy Villacoublay FRX), Method for the manufacture of floors for filters, and floors thus made.
  18. Bergmann Eugen O. (Butler County PA) Brown Marvin A. (Allegheny County PA) Beverly Richard P. (Butler County PA), Mutli-lateral filter underdrain block.
  19. Gresh Richard D. (Coraopolis PA) Netherland Robert B. (Beaver PA), Plastic-jacketed filter underdrain block.
  20. Ward Thomas D. (Mineral Wells TX), Pleated filter underdrain, method and apparatus.
  21. Walter Thomas P. (Dallas PA), Purification underdrain with means to compensate for flow and pressure differences between laterals.
  22. Cheetham John H. (Twickenham GB2), Strainer assembly for granular media filters.
  23. Louboutin Robert (Crespires FRX) Gibaud Jean (Paris FRX), Submerged filter filled with granular material.
  24. Emrie Robert E. (Austin TX), Underdrain unit with air/water backwash for granular filtration system.
  25. Sasano Kenji (Chiba JPX) Shiramasa Ichiro (Tokyo JPX), Water collecting and distributing apparatus disposed in a lower portion of high speed filter basin.

이 특허를 인용한 특허 (33)

  1. Hunkele Gary ; Knauff Paul, Anchor for an underdrain block.
  2. Geibel, John L., Apparatus and method for distributing gas and liquid during backwash in filter underdrain flumes using dual separation.
  3. Roberts, R. Lee; Addison, Mark Kevin, Apparatus for directing fluids through a filter system.
  4. Roberts,R. Lee; Addison,Mark Kevin, Apparatus for directing fluids through a filter system.
  5. Roberts,R. Lee; Addison,Mark Kevin, Apparatus for directing fluids through a filter system.
  6. Bergman Eugene O. ; Hsieh Richard W. ; Geibel John, Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in filter underdrain flumes.
  7. Bergmann Eugen O. ; Hsieh Richard W. ; Geibel John, Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in filter underdrain flumes.
  8. Geibel, John L.; Ball, Christopher J., Clog resistant media retainer assembly.
  9. St. Germain,Darin, Filter having a media retaining plate.
  10. St. Germain,Darin, Filter having a media retaining plate.
  11. Ball, Christopher J.; Bates, Brian, Filter media retainer.
  12. Ball, Christopher J.; Bates, Brian, Filter media retainer assembly.
  13. Ball, Christopher J.; Bates, Brian J.; Sweeney, Howard James, Filter media retainer assembly.
  14. Jackson,Scott; Germain,Darin St.; Steinke,Thomas J.; Gallagher,Paul M., Filter media retaining cap and hold down grid.
  15. Haggard, Sr., Gary D.; Kelly, Brendan, Filter underdrain with internal air scour laterals.
  16. Kupke John A. ; Kupke Joseph A. ; Pfeifer ; Jr. John F., Filter underdrain with prefabricated cells.
  17. Roberts R. Lee ; Addison Mark Kevin ; Taylor Andrew Scott, Filtration system having a low profile extruded underdrain.
  18. Berkebile, Dean T.; Bates, Brian J.; Green, Robert J., Gas-liquid distribution technique for water or wastewater filters using underdrains.
  19. Ball, Christopher J., Granular filter media retainer.
  20. Stegge, Jerry, Integrated liquid and gas distribution device for underdrain block laterals.
  21. Roberts, R. Lee; Addison, Mark Kevin; Taylor, Andrew Scott, Low profile extruded underdrain.
  22. Geibel, John L.; Vegso, Eugene M.; Ball, Christopher J.; Laird, Robert L.; Getting, Thomas M.; Berkebile, Dean T., Method and system for cleaning filter media support structures.
  23. Roberts, R. Lee; Addison, Mark Kevin, Method of washing a particulate filter bed using an underdrain.
  24. Addison,Mark Kevin, Underdrain.
  25. Addison,Mark Kevin, Underdrain.
  26. Ball, Christopher J.; Bates, Brian J.; Sweeney, Howard J., Underdrain and method for transferring forces and directing flow.
  27. Meurer, Charles Lonnie, Underdrain assembly and method of manufacturing same.
  28. Meurer, Charles Lonnie, Underdrain assembly and method of manufacturing the same.
  29. Jantsch ; Sr. Steven Mark ; Hunkele Gary, Underdrain block for filter media system.
  30. Haggard, Gary D., Underdrain filtration system with stamped perforations.
  31. Roberts, R. Lee; Jackson, Troy A.; Cristaldi, Joseph L., Underdrain for a filter system for filtering water or wastewater.
  32. Roberts, R. Lee; Addison, Mark Kevin, Underdrain system.
  33. Roberts, R. Lee; Addison, Mark Kevin, Underdrain system.
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