Method for contacting large volumes of gas and liquid across microscopic interfaces
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-019/00
B01F-003/04
출원번호
US-0981718
(2004-11-05)
발명자
/ 주소
Peters, Janet K.
출원인 / 주소
Jaeco Technology, Inc.
인용정보
피인용 횟수 :
29인용 특허 :
20
초록▼
A method for contacting large volumes of gas and liquid together on a microscopic scale for mass transfer or transport processes wherein the contact between liquid and gas occurs at the interfaces of a multitude of gas bubbles. Multiple porous tubes assembled in a bundle inside a pressure vessel ter
A method for contacting large volumes of gas and liquid together on a microscopic scale for mass transfer or transport processes wherein the contact between liquid and gas occurs at the interfaces of a multitude of gas bubbles. Multiple porous tubes assembled in a bundle inside a pressure vessel terminate at each end in a tube sheet. A thin film helical liquid flow is introduced into the inside of each porous tube around and along its inside wall. Gas is sparged into the porous media and the liquid film so that an annular two phase flow with a uniform distribution of tiny gas bubbles results. The gas flow is segregated from the liquid flow without first passing through the porous media and through the liquid film. Nozzles at the lower end of the tubes divert liquid flow to a vessel and redirect the gas flow in a countercurrent direction.
대표청구항▼
1. A method for contacting large volumes of gas and liquid across a multitude of microscopic interfaces, comprising the steps of:providing an outer vessel having a central longitudinal axis circumscribed by a non-porous generally cylindrical side wall with first and second ends, and a plurality of e
1. A method for contacting large volumes of gas and liquid across a multitude of microscopic interfaces, comprising the steps of:providing an outer vessel having a central longitudinal axis circumscribed by a non-porous generally cylindrical side wall with first and second ends, and a plurality of elongate tubes within said outer vessel disposed in circumferentially spaced relation having longitudinal axes parallel to and radially spaced from said outer vessel longitudinal axis, each of said tubes having a microscopically porous side wall with an inner surface surrounding a hollow interior and opposed first and second ends, said outer vessel sealed around said first and second ends of said tubes to form a pressurized gas chamber surrounding said tubes;introducing a stream of liquid into the first end of said plurality of tubes tangential to the inner surface thereof;controlling the flow of a thin film of the liquid in a spiral pattern around and along the inner surface of each of said plurality of tubes from said first end to said second end, so as to impose centrifugal accelerations on the liquid on the inner surfaces thereof;sparging a gas through the porous side wall of each of said plurality of tubes and through the liquid spiraling therethrough at an overall gas to liquid volumetric flow ratio of up to a maximum rated differential pressure measured across each tube, whereby the overall gas to liquid flow rate is divided into a number of individual transfer units in which the interfacial contact area between gas and liquid is extremely large, whereby highly efficient transport between liquid and gas is achieved.2. The method according to claim 1, comprising the further step of:ceasing sparging of gas into the liquid in a region adjacent to said second end of each of said plurality of tubes while allowing the liquid to continue spiraling toward said second end for a sufficient distance and time to allow degassing of the liquid and separation of the gas and liquid into an annular film of liquid around the inner surface of each of said plurality of tubes and a column of gas at the center thereof.3. The method according to claim 2, comprising the further steps of:separating the liquid from the gas at said second end of each of said plurality of tubes;discharging the separated liquid from said second end; andredirecting the separated gas to said first end.4. The method according to claim 2, comprising the further steps of:separating the liquid from the gas at said second end of each of said plurality of tubes;discharging the separated liquid from said second end; andredirecting the separated gas to either of said first ends and second ends of said plurality of tubes.5. The method according to claim 1, whereinsaid pressurized gas chamber of said outer vessel is divided into a plurality of segregated pressurized gas chambers each having a gas inlet for introducing gas therein, and each of said elongate tubes is disposed within a respective one of said pressurized gas chambers; andsaid step of sparging a gas through the porous side wall of each of said plurality of tubes and through the liquid spiraling therethrough comprises supplying gas to each of said plurality of tubes individually at selected pressures.6. The method according to claim 1, whereinsaid step of introducing a stream of liquid to said first end of said plurality of tubes tangential to the inner surface thereof comprises introducing a stream of liquid tangentially into said interior of each of said tubes individually at selected velocities.7. A method for contacting large volumes of gas and liquid across a multitude of microscopic interfaces, comprising the steps of:providing an outer vessel having a central longitudinal axis circumscribed by a non-porous generally cylindrical side wall with first and second ends, and a plurality of elongate tubes within said outer vessel disposed in circumferentially spaced relation having longitudinal axes parallel to and radially spaced from said outer vessel longitudinal axis, each of said tubes having a microscopically porous side wall with an inner surface surrounding a hollow interior and opposed first and second ends, said pressurized gas chamber of said outer vessel divided into a plurality of segregated pressurized gas chambers each having a gas inlet for introducing gas therein, and each of said elongate tubes disposed within a respective one of said pressurized gas chambers;introducing a stream of liquid into the first end of selected ones of said plurality of tubes tangential to the inner surface thereof at selected velocities;controlling the flow of a thin film of the liquid in a spiral pattern around and along the inner surface of each of said selected ones of said plurality of tubes from said first end to said second end, so as to impose centrifugal accelerations on the liquid on the inner surfaces thereof;sparging a gas through the porous side wall of each of said selected ones of said plurality of tubes and through the liquid spiraling therethrough at an overall gas to liquid volumetric flow ratio of up to a maximum rated differential pressure measured across each tube, whereby the overall gas to liquid flow rate is divided into a number of individual transfer units in which the interfacial contact area between gas and liquid is extremely large, whereby highly efficient transport between liquid and gas is achieved.8. The method according to claim 7, comprising the further step of:ceasing sparging of gas into the liquid in a region adjacent to said second end of each of said selected ones of said plurality of tubes while allowing the liquid to continue spiraling toward said second end for a sufficient distance and time to allow degassing of the liquid and separation of the gas and liquid into an annular film of liquid around the inner surface of each of said selected ones of said plurality of tubes and a column of gas at the center thereof.9. The method according to claim 8, comprising the further steps of:separating the liquid from the gas at said second end of each of said selected ones of said plurality of tubes;discharging the separated liquid from said second end thereof; andredirecting the separated gas to said first end thereof.10. The method according to claim 8, comprising the further steps of:separating the liquid from the gas at said second end of each of said plurality of tubes;discharging the separated liquid from said second end; andredirecting the separated gas to either of said first ends and second ends of said plurality of tubes.11. A method for contacting large volumes of a first fluid of lighter density and a second fluid of heavier density across a multitude of microscopic interfaces, comprising the steps of:providing an outer vessel having a central longitudinal axis circumscribed by a non-porous generally cylindrical side wall with first and second ends, and a plurality of elongate tubes within said outer vessel disposed in circumferentially spaced relation having longitudinal axes parallel to and radially spaced from said outer vessel longitudinal axis, each of said tubes having a microscopically porous side wall with an inner surface surrounding a hollow interior and opposed first and second ends, said outer vessel sealed around said first and second ends of said tubes to form a pressurized chamber surrounding said tubes for receiving the first fluid of lighter density;introducing a stream of the second fluid of heavier density into the first end of said plurality of tubes tangential to the inner surface thereof;controlling the flow of a thin film of the second fluid of heavier density in a spiral pattern around and along the inner surface of each of said plurality of tubes from said first end to said second end, so as to impose centrifugal accelerations on the second fluid on the inner surfaces thereof;sparging the first fluid of lighter density through the porous side wall of each of said plurality of tubes and through the liquid spiraling therethrough at an overall lighter density fluid to heavier density fluid volumetric flow ratio of up to a maximum rated differential pressure measured across each tube, whereby the overall lighter density fluid to heavier density fluid flow rate is divided into a number of individual transfer units in which the interfacial contact area between lighter density fluid and heavier density fluid is extremely large, whereby highly efficient transport between the first fluid of lighter density and the second fluid of heavier density is achieved.12. The method according to claim 11, comprising the further step of:ceasing sparging of the fluid of lighter density into the fluid of heavier density in a region adjacent to said second end of each of said plurality of tubes while allowing the fluid of heavier density to continue spiraling toward said second end for a sufficient distance and time to allow lighter components to separate from heavier components into an annular film of heavier density fluid around the inner surface of each of said plurality of tubes and a column of lighter density fluid at the center thereof.
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이 특허에 인용된 특허 (20)
Miller Jan D. (Salt Lake City UT) Yi Ye (Salt Lake City UT), Air sparged hydrocyclone flotation apparatus and methods for separating particles from a particulate suspension.
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Grisham Thomas L. ; Peters Janet K. ; Sharp Keith W. ; Ebel Edward E., Method and apparatus for optimizing and controlling gas-liquid phase chemical reactions.
Grisham Thomas L. (Tyler TX) Peters Janet K. (Kilgore TX) Sharp Keith W. (Richmond TX) Ebel Edward E. (Mabank TX), Method and apparatus for optimizing gas-liquid interfacial contact.
Grisham Thomas L. (Tyler TX) Peters Janet K. (Kilgore TX) Sharp Keith W. (Richmond TX) Ebel Edward E. (Mabank TX), Method for creating gas-liquid interfacial contact conditions for highly efficient mass transfer.
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Neumann, David Kurt; Awtry, Andrew R.; Brasseur, Jason K.; Hobbs, Keith R.; Nizamov, Boris R.; Henshaw, Thomas Lee, Method of processing gas phase molecules by gas-liquid contact.
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