Apparatus and method for disturbing gas and liquid during backwash in filter underdrain flumes using dual separation

Apparatus and method for disturbing gas and liquid during backwash in filter underdrain flumes using dual separation

  • CN 101,247,872 B
  • Filed: 05/17/2006
  • Issued: 08/27/2014
  • Est. Priority Date: 05/17/2005
  • Status: Active Grant
First Claim
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1. a backwash distribution apparatus, comprising:

  • There is the filter of lautertuns;

    Adjacent with lautertuns and with the water channel of lautertuns fluid connection, described water channel has for backwash liquid being introduced to the fluid openings in water channel;

    The first spacer assembly, thereby it is arranged in described water channel and determines the first secondary channel between described the first spacer assembly and described lautertuns, described the first secondary channel and water channel and with lautertuns fluid connection, described the first spacer assembly has at least one and is positioned at the water channel level meter metering-orifice of the first spacer assembly, described water channel level meter metering-orifice is set and coexists in backwash operation process liquid is delivered to the first secondary channel in order to the gas/liquid in lautertuns;

    WithThe second spacer assembly, thereby its be arranged in water channel and and spaced apart second secondary channel of determining between the first and second spacer assemblys of described the first spacer assembly, described the first spacer assembly and the second spacer assembly are all positioned at the same side of fluid openings, and described the second spacer assembly extends on the height higher than described fluid openings;

    Wherein, carrying out with gas in the process of backwash, in the time that liquid is present in water channel, the gas/liquid interface in water channel is maintained at higher than described fluid openings.

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