Liquid purification or separation – With means to add treating material – Directly applied to separator
Patent
1995-08-10
1998-10-13
Lithgow, Thomas M.
Liquid purification or separation
With means to add treating material
Directly applied to separator
210665, 210669, 210694, 210712, 210722, 210723, 210724, 210726, 210738, 210 98, 210101, 210143, 210172, 2102571, 210259, 210266, 210199, 210205, 210206, 210202, 210220, 210258, B01D 3600, C02F 152, C02F 174, C02F 900
Patent
active
058207520
ABSTRACT:
A recycling apparatus which preferably treats used antifreeze/coolant in four cycles is disclosed. The recycling apparatus includes a number of tanks for storing the antifreeze/coolant during the various treatment cycles, a number of containers for storing chemical reagents used to chemically treat the antifreeze/coolant and a number of filters used to capture impurities suspended in the treated antifreeze/coolant. During a fill cycle, the used antifreeze/coolant is introduced into a treatment tank and the concentration of the antifreeze/coolant is adjusted, if necessary, to a predefined range. During a mix cycle, the used antifreeze/coolant is mixed with various reagents to adjust the pH value, as well as to coagulate and flocculate the impurities. A reverse mixing and aspiration of the antifreeze/coolant in the tank during the mix cycle ensure that the reagents will mix well and react with the impurities in the used antifreeze/coolant to form a sludge. During a dormant cycle, the fluid in the tank is allowed to set, while the sludge is caused to rise to the top of the fluid. Finally, during a drain and filter cycle, the treated antifreeze/coolant is vacuum-drained from the treatment tank and is filtered and reinhibited before being stored in a storage tank. The treatment tank is preferably conically-shaped with a double step in its apex to assist the removal of sludge during the vacuum evacuation procedure.
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Berke Norman D.
Gershun Aleksei V.
Rosvally Robert J.
Woodward Stephen M.
Woyciesjes Peter M.
Lithgow Thomas M.
Prestone Products Corporation
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