[특허]Gas sparging method for removing volatile contaminants from liquids

Gas sparging method for removing volatile contaminants from liquids 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C02F-001/24
출원번호	US-0406502 (1995-03-20)
발명자 / 주소	Grisham Thomas L. (Tyler TX) Peters Janet K. (Gilmer TX)
출원인 / 주소	Revtech Industries, Inc. (Kilgore TX 02)
인용정보	피인용 횟수 : 62 인용 특허 : 0

초록 ▼

Apparatus for removing volatile contaminant compounds from a liquid by sparging a cleaning gas therethrough comprises a volatile contaminant extraction assembly including a hollow porous tube surrounded by an outer jacket defining a gas plenum between the jacket and the porous tube; a contaminated liquid feed assembly including a nozzle for injecting liquid into the porous tube in a spiraling flow pattern around and along the porous tube; a gas-liquid separator assembly including a nonporous degassing tube coaxially aligned with and connected to the porous tube, a separator tube coaxially aligned with and connected to the degassing tube and flaring outwardly in diameter from the degassing tube, and a gas duct coaxially aligned with the separator tube and extending into the separator tube to collect and convey cleaning gas therefrom; a clean liquid collection assembly; and a gas discharge assembly. A method of removing volatile contaminants from a liquid comprises the general steps of introducing a stream of contaminated liquid to the hollow interior of a cylindrical porous tub in a thin film following a spiral flow pattern around and along the wall of the tube; controlling the physical characteristics of the liquid film and the flow pattern followed by the film through the tube; sparging cleaning gas through the wall of the tube and into the liquid film at a preselected flow rate; segregating contaminant laden cleaning gas from the liquid within the tube; and separating the cleaned liquid stream from the contaminant laden gas stream.

대표청구항 ▼

A method of removing volatile contaminants from a liquid utilizing apparatus having an elongate disposed tube with first and second ends, with a wall, and with a porous section for the sparging of cleaning gas therethrough to the interior of the tube, having a nonporous degassing section adjacent to the second end of the tube, and also having a cylindrical gas duct in coaxial alignment with the tube, comprising the steps of introducing a stream of liquid contaminated by volatile components to be removed from said liquid to the first end of the porous section of the cylindrical tube tangential to the interior surface of said tube; controlling the flow of said liquid in a spiral pattern around and along said inner surface of said tube from said first end to the second end, such that each incremental volume of liquid moves around said inner surface of said tube between about 20 and about 35 times; sparging a cleaning gas through the wall of said porous section of said tube and through said liquid spiraling through said tube at a gas to liquid volumetric flow ratio between about 20 to 1 and about 35 to 1, with said volumetric flow ratio equal to the number of times each incremental volume of said liquid moves around the inner surface of said porous section of said tube, whereby contaminant components are transferred from said liquid to said gas; ceasing sparging of cleaning gas into said liquid in the degassing section adjacent to said second end of said tube while allowing said liquid to continue spiraling toward said second end of said tube for a sufficient distance and time to allow degassing of said liquid and separation of said gas and said liquid into an annular film of liquid around the inner circumference of said tube and a column of gas at the center of said tube; drawing said column of gas toward the second end of said tube in co-current flow with the movement of liquid along said tube; physically dividing said liquid from said gas at said second end of said tube by interposing said cylindrical gas duct between said gas and said liquid at the gas-liquid interface; collecting the cleaned liquid in a first collection vessel; and conveying the contaminant laden gas through said cylindrical gas duct from the apparatus.

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Gas sparging method for removing volatile contaminants from liquids 원문보기

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