Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1995-07-10
1997-10-21
Drodge, Joseph W.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210 86, 210104, 210109, 210259, 210521, 210804, 210808, B01D 17035, B01D 2134
Patent
active
056792581
ABSTRACT:
A system to collect by vacuum conveyance, separate, and discharge two mixed immiscible liquids with different specific gravities comprising a grit, sediment, particulate, and floating debris removal/collection chamber 11, vacuum tank 51, optional heavy phase supplemental separation stage 47A, and optional light phase supplemental separation stage 47B. Vacuum tank 51 is 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 tank 51. Collection conduits can have manually, mechanically, or electro-mechanically controlled valves at their source ends. Any grit, sediment, particles, floatable debris, and entrained air in the collection conduits is removed from the mixed liquid stream prior to undergoing any phase separation stages. Initial phase separation occurs automatically in vacuum tank 51, which provides 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 tank 51. Additional phase separation can occur, if necessary, in supplemental separation stage(s) 47A and/or 47B. Heavy phase supplemental separation stage 47A separates the light phase from the heavy phase, if necessary. Light phase supplemental separation stage 47B separates 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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