Gas separation: processes – Degasification of liquid – Plural successive degassing treatments
Reexamination Certificate
2005-04-12
2005-04-12
Hopkins, Robert A. (Department: 1724)
Gas separation: processes
Degasification of liquid
Plural successive degassing treatments
C095S263000, C096S202000, C261S076000
Reexamination Certificate
active
06878188
ABSTRACT:
A method and apparatus for removing volatile contaminants, such as methyl tertbutyl ether (MTBE), from water or other supplies of liquid. In one embodiment of the invention, a gas is sparged through a helical flow of liquid to strip away contaminants. The flowrate of the helical flow of liquid and the flowrate of the gas are held at an optimum ratio to maintain flow stability and maximize stripping efficiency. In another embodiment of the invention, the liquid is processed through a series of stripping stages until volatile contaminants are stripped to a desired level. A portion of the liquid is recycled within each stage, while a system flow of liquid passed from one stage to the next. The flowrate of the recycled flow and the flowrate of the system flow have a ratio that provides improved system capacity while ensuring proper volatile removal.
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Hopkins Robert A.
TraskBritt
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