Liquid purification or separation – Flow – fluid pressure or material level – responsive – Diverse sensing means
Reexamination Certificate
2007-02-06
2007-02-06
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Diverse sensing means
C210S115000, C210S134000, C210S207000, C210S259000, C210S299000, C210S521000, C210S532100, C210S538000, C210S539000, C210S540000
Reexamination Certificate
active
10729765
ABSTRACT:
A system to collect by vacuum conveyance, separate, and discharge two mixed immiscible liquids with different specific gravities comprising a prefilter vessel200, a vacuum tank100, an optional heavy phase intermediate separation stage40, and an optional light phase intermediate separation stage30. Vacuum tank100is under a constant regulated vacuum, which sucks mixed immiscible liquids with different specific gravities from their respective remote source(s) through conduit(s) connected to vacuum tank100. Collection conduits can have manually, mechanically, or electro-mechanically controlled valves at their source ends. Any grit, sediment, particles, and/or floatable debris in the collection conduits is first removed, and then any entrained air in the mixed liquid stream is removed, from the mixed liquid stream prior to undergoing any phase separation stages. Initial phase separation occurs automatically in vacuum tank100without any phase interface detection devices. Vacuum tank100provides quiescent conditions for gravity separation of mixed immiscible liquids. Gravity separation is further enhanced by low grade dissolved air flotation separation which is induced by the vacuum in vacuum tank100. Additional phase separation can occur, if necessary, in intermediate separation stage(s)40and/or30. Heavy phase intermediate separation stage40separates the light phase from the heavy phase, if necessary. Light phase intermediate separation stage30separates the heavy phase from the light phase, if necessary. Separated phases are discharged to their own individual repository or depository, such as a storage tank, a sewer, well injection, additional separation, additional treatment to remove other contaminants, and/or process reuse.
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