WO2001010770A1 - Fuel storage system with vent filter assembly - Google Patents
Fuel storage system with vent filter assembly Download PDFInfo
- Publication number
- WO2001010770A1 WO2001010770A1 PCT/US1999/017914 US9917914W WO0110770A1 WO 2001010770 A1 WO2001010770 A1 WO 2001010770A1 US 9917914 W US9917914 W US 9917914W WO 0110770 A1 WO0110770 A1 WO 0110770A1
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- WO
- WIPO (PCT)
- Prior art keywords
- air
- port
- fluid flow
- storage system
- additional
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
- B67D7/0476—Vapour recovery systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
- B67D7/763—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators of air separators
Definitions
- the present invention relates to a system for reducing the discharge of pollutants from underground gasoline storage tanks.
- the system is arranged to discharge pollutant free air when the pressure within the system reaches a predetermined level. Air to be discharged is separated from gasoline vapor within the storage system prior to its discharge.
- U.S. Patent No. 5,464,466, to Nanaji et al. describes a fuel storage tank vent filter system where a filter or fractionating membrane is used to capture pollutants from the vapor vented from the system's fuel storage tanks.
- a property of the membrane is that it will capture or collect selected pollutants including hydrocarbons.
- the captured pollutants are drawn from the membrane as a liquid and returned to the fuel storage tanks.
- the fractionating membrane comprises a plurality of stacked and bound thin sheets. Each sheet has a hole formed in its center to form an aperture in the stack extending axially from end to end.
- a perforated removal pipe must be positioned in the axial aperture to enable the captured vapors to be drawn out of the membrane under a vacuum created by a vacuum pump.
- a fuel storage system vent filter assembly that includes a fuel vapor duct defining a substantially unobstructed flow path extending from the filter input port to a primary filter output port. Air is drawn through an air-permeable partition and larger, less mobile, pollutant hydrocarbons or VOC's pass to an outlet duct essentially unobstructed by the partition.
- a fuel storage system comprising at least one storage tank, an air exhaust port, a filter system, a primary pump, and at least one secondary pump.
- the storage tank includes a fuel delivery port, a fluid vent port, and a pollutant return port.
- the filter system comprises a filter input port coupled to the fluid vent port and a fuel vapor duct defining a substantially unobstructed flow path extending from the filter input port to a primary filter output port.
- the primary filter output port is coupled to the pollutant return port.
- At least a portion of the fuel vapor duct forms an air-permeable partition designed to pass an air component of fluid within the fuel vapor duct through the air permeable partition and designed to inhibit passage of a pollutant component of fluid within the fuel vapor duct through the air-permeable partition.
- a secondary filter output port is partitioned from the fuel vapor duct by the air-permeable partition and is coupled to the air exhaust port.
- the primary pump is positioned to cause fluid to pass from the filter input port to the primary filter output port.
- the secondary pump(s) is/are positioned to cause the air component within the fuel vapor duct to pass through the air-permeable partition to the secondary filter output port and the air exhaust port.
- the primary pump has a characteristic pumping capacity capable of generating a first volumetric fluid flow rate and the secondary pump has a characteristic pumping capacity capable of generating a second volumetric fluid flow rate through the air permeable partition to the secondary filter output port, and capable of generating, in combination with the primary pump, a third volumetric fluid flow rate through the primary filter output port.
- the second volumetric fluid flow rate is greater than a characteristic average net fluid volume return rate of the fuel storage system.
- the volumetric fluid flow rate through the air exhaust port is preferably approximately two to five times greater than the characteristic average net fluid volume return rate or at least approximately two times greater than the characteristic average net fluid volume return rate.
- the first volumetric fluid flow rate is preferably approximately two to eight times the value of the second volumetric fluid flow rate.
- the second volumetric fluid flow rate is preferably between approximately 15 standard cubic feet per hour and approximately 150 standard cubic feet per hour or preferably approximately 40 standard cubic feet per hour.
- the secondary pump is preferably designed to create a pressure drop of less than 100 kPa across the air-permeable partition, approximately 50 kPa across the air- permeable partition, between approximately 25 kPa and approximately 75 kPa across the air-permeable partition, or between approximately 37.5 kPa and approximately 62.5 kPa across the air-permeable partition.
- the primary pump has a characteristic pumping capacity capable of generating a fluid flow of between approximately 150 standard cubic feet per hour and approximately 1500 standard cubic feet per hour, or approximately 320 standard cubic feet per hour.
- the filter system may include a plurality of fuel vapor ducts.
- the plurality of fuel vapor ducts may define a plurality of substantially unobstructed flow paths therein extending from the filter input port to the primary filter output port.
- Each of the plurality of fuel vapor ducts may form separate portions of the air-permeable partition so as to pass and inhibit respective portions of the air component and the pollutant component.
- Each of the plurality of fuel vapor ducts may be enclosed within a common fuel vapor duct enclosure.
- the filter input port, the primary filter output port, and the secondary filter output port may be formed in the common fuel vapor duct enclosure.
- the substantially unobstructed flow path may comprise a substantially linear flow path and the filter input port and the primary filter output port may be positioned at opposite ends of the substantially linear flow path.
- the air-permeable partition may comprise an air-permeable membrane supported by a porous tube and the substantially unobstructed flow path may extend along a longitudinal axis of the porous tube.
- the fuel vapor duct and the primary pump may be arranged such that fluid passes from the filter input port to the primary filter output port with a negligible pressure drop.
- a fuel storage system comprising at least one storage tank, an air exhaust port, a first filter assembly, a primary pump, a least one secondary pump, at least one additional filter assembly, and an additional secondary pump.
- the storage tanks include a fuel delivery port, a fluid vent port, and a pollutant return port.
- the first filter assembly comprises a filter input port, a fuel vapor duct, a primary filter output port, and a secondary filter output port.
- the filter input port is coupled to the fluid vent port.
- the fuel vapor duct defines a substantially unobstructed flow path extending from the filter input port to a primary filter output port.
- the primary filter output port is coupled to the pollutant return port.
- At least a portion of the fuel vapor duct forms an air-permeable partition designed to pass an air component of fluid within the fuel vapor duct through the air permeable partition and designed to inhibit passage of a pollutant component of fluid within the fuel vapor duct through the air-permeable partition.
- the secondary filter output port is partitioned from the fuel vapor duct by the air-permeable partition.
- the primary pump is positioned to cause fluid to pass from the filter input port to the primary filter output port.
- the secondary pump(s) is/are positioned to cause the air component within the fuel vapor duct to pass through the air-permeable partition to the secondary filter output port.
- the additional filter assembly comprises an additional filter input port, an additional fuel vapor duct, an additional primary filter output port, and an additional secondary filter output port.
- the additional filter input port is coupled to the secondary filter output port.
- the additional fuel vapor duct defines a substantially unobstructed flow path extending from the additional filter input port to the additional primary filter output port.
- the additional primary filter output port is coupled to the pollutant return port.
- At least a portion of the additional fuel vapor duct defines an additional air-permeable partition designed to pass an air component of fluid within the additional fuel vapor duct through the additional air permeable partition and designed to inhibit passage of a pollutant component of fluid within the additional fuel vapor duct through the additional air-permeable partition.
- the additional secondary filter output port is partitioned from the additional fuel vapor duct by the additional air- permeable partition and is coupled to the air exhaust port.
- the additional secondary pump is coupled to the additional filter assembly and is positioned to cause the air component within the additional fuel vapor duct to pass through the additional air- permeable partition to the additional secondary filter output port.
- the primary filter pump, the secondary filter pump, and the additional secondary pump are characterized by respective pumping capacities capable of generating a volumetric fluid flow rate through the air exhaust port greater than the characteristic average net fluid volume return rate.
- the volumetric fluid flow rate through the air exhaust port is preferably approximately two to five times greater than the characteristic average net fluid volume return rate or at least approximately two times greater than the characteristic average net fluid volume return rate.
- the volumetric fluid flow rate through the air exhaust port is preferably between approximately 15 standard cubic feet per hour and approximately 150 standard cubic feet per hour or approximately 40 standard cubic feet per hour.
- the primary pump has a characteristic pumping capacity capable of generating a first volumetric fluid flow rate.
- the secondary pump has a characteristic pumping capacity capable of generating a second volumetric fluid flow rate through the air permeable partition to the secondary filter output port, and capable of generating, in combination with the primary pump, a third volumetric fluid flow rate through the primary filter output port.
- the additional secondary pump has a characteristic pumping capacity capable of generating a fourth volumetric fluid flow rate through the additional air permeable partition to the additional secondary filter output port, and capable of generating, in combination with the secondary pump, a fifth volumetric fluid flow rate through the additional primary filter output port.
- the fourth volumetric fluid flow rate is greater than a characteristic average net fluid volume return rate of the fuel storage system.
- the first volumetric fluid flow rate is preferably approximately twice the value of the second and third volumetric fluid flow rates and the second and third volumetric fluid flow rates are preferably approximately twice the value of the fourth and fifth volumetric fluid flow rates.
- the secondary pump is preferably designed to create a pressure drop of less than 100 kPa across the air-permeable partition, approximately 50 kPa across the air- permeable partition, between approximately 25 kPa and approximately 75 kPa across the air-permeable partition, or between approximately 37.5 kPa and approximately 62.5 kPa across the air-permeable partition.
- the fuel storage system preferably comprises two additional filter assemblies connected to each other in series such that: (i) the primary pump has a characteristic pumping capacity capable of generating a first volumetric fluid flow rate; (ii) the secondary pump has a characteristic pumping capacity capable of generating a second volumetric fluid flow rate through the air permeable partition to the secondary filter output port, and capable of generating, in combination with the primary pump, a third volumetric fluid flow rate through the primary filter output port; (iii) the additional secondary pump has a characteristic pumping capacity capable of generating a fourth volumetric fluid flow rate through the additional air permeable partition to the additional secondary filter output port, and capable of generating, in combination with the secondary pump, a fifth volumetric fluid flow rate through the additional primary filter output port; (iv) the second additional secondary pump has a characteristic pumping capacity capable of generating a sixth volumetric fluid flow rate through a second additional air permeable partition to a second additional secondary filter output port, and capable of generating, in combination with the additional secondary pump, a seventh volumetric
- the first volumetric fluid flow rate is approximately twice the value of the second and third volumetric fluid flow rates
- the second and third volumetric fluid flow rates are approximately twice the value of the fourth and fifth volumetric fluid flow rates
- the fourth and fifth volumetric fluid flow rates are approximately twice the value of the sixth and seventh volumetric fluid flow rates.
- a method of storing fuel comprising the steps of: providing at least one storage tank including a fuel delivery port, a fluid vent port, and a pollutant return port; providing an air exhaust port; providing a filter system comprising (i) a filter input port coupled to the fluid vent port, (ii) a fuel vapor duct defining a substantially unobstructed flow path extending from the filter input port to a primary filter output port, wherein the primary filter output port is coupled to the pollutant return port, and wherein at least a portion of the fuel vapor duct forms an air-permeable partition designed to pass an air component of fluid within the fuel vapor duct through the air permeable partition and designed to inhibit passage of a pollutant component of fluid within the fuel vapor duct through the air-permeable partition, and (iii) a secondary filter output port partitioned from the fuel vapor duct by the air-permeable partition and coupled to the air exhaust port; positioning a primary pump
- a fuel storage system including a vent filter assembly that includes a fuel vapor duct defining a substantially unobstructed flow path extending from the filter input port to a primary filter output port.
- a filter system and associated pumping hardware designed to optimize the efficiency of the fuel storage system.
- Fig. 1 is a schematic illustration of a fuel storage system according to the present invention
- Fig. 2 is a schematic illustration of a filter system portion of a fuel storage system according to the present invention
- Fig. 3 is an illustration of a filter assembly portion of a fuel storage system according to the present invention.
- Fig. 4 is a blown up view, partially broken away, of a portion of the filter assembly illustrated in Fig. 3;
- Fig. 5 is an illustration, partially broken away, of a fuel vapor duct portion of a fuel storage system according to the present invention.
- a fuel storage system 10 is illustrated in Figs. 1-5.
- the fuel storage system 10 comprises a plurality of storage tanks 12, an air exhaust port 14, and a filter system 16.
- the storage tanks 12 are coupled to fuel inlet ports 17, fuel delivery ports 18, pressure relief ports 19, a fluid vent port 20, a vapor return port 21 , a pollutant return port 22, vapor pressure equalization piping 24, and vent piping 26.
- the fuel dispensing nozzles of the system (not shown) are arranged to return fuel vapor to the storage tanks 12 via the vapor return ports 21.
- any reference herein to a fluid denotes either a gas, a liquid, a gas/liquid mixture, or a gas, liquid, or gas liquid mixture carrying particulate matter.
- the filter system 16 comprises a filter assembly 30, a primary pump or blower 40 coupled to a primary input port 28, and a secondary pump 50.
- the filter assembly 30 includes a filter input port 32, a plurality of fuel vapor ducts 34 (see Figs. 3 and 4), a primary filter output port 36, and a secondary filter output port 38.
- the filter input port 32 is directly coupled to the fluid vent port 20 illustrated in Fig. 1 and the primary filter output port 36 is directly coupled to the pollutant return port 22, also illustrated in Fig. 1.
- the filter assembly 30 is a product available from Compact Membrane Systems Inc., Wilmington, DE.
- the fuel vapor ducts 34 define a substantially unobstructed flow path 35 extending from the filter input port 32 to the primary filter output port 36. At least a portion of, and preferably all of, each fuel vapor duct 34 forms an air-permeable partition 37 designed to pass an air component of fluid within the fuel vapor duct 34 through the air permeable partition 37, see directional arrows 33 in Fig. 3. Passage of a pollutant component of fluid, e.g., VOC's, within the fuel vapor duct 34 through the air-permeable partition 37 is inhibited.
- a pollutant component of fluid e.g., VOC's
- the air-permeable partition 37 comprises an air-permeable membrane 44 supported by a porous tube 46 and the substantially unobstructed flow path 35 extends along a longitudinal axis of the porous tube 46.
- a potting compound 48 is preferably interposed between opposite end portions of adjacent fuel vapor ducts 34 to ensure that all of the fluid incident upon the filter input port 32 is forced to pass through the interior of the fuel vapor ducts 34, as opposed to through the spaces between the fuel vapor ducts 34.
- the substantially unobstructed flow path 35 it is noted that when reference is made herein to the substantially unobstructed flow path 35, the presence of the potting compound 48 is not considered to be a substantial obstruction.
- the secondary filter output port 38 is partitioned from the fuel vapor duct 34 by the air-permeable partition 37 and is directly coupled to the air exhaust port 14.
- the primary pump 40 is positioned to cause fluid to pass from the filter input port 32 through each fuel vapor duct 34 to the primary filter output port 36.
- the secondary pump 50 is positioned to cause the air component within the fuel vapor duct 34 to pass through the air-permeable partition 37 to the secondary filter output port 38 and the air exhaust port 14.
- the filter system 16 includes a plurality fuel vapor ducts 34 that define respective substantially linear unobstructed flow paths 35 therein extending from the filter input port 32 to the primary filter output port 36.
- Each of the fuel vapor ducts 34 form separate portions of a collective air-permeable partition 37 and are enclosed within a common fuel vapor duct enclosure 42.
- the filter input port 32, the primary filter output port 36, and the secondary filter output port 38 are formed in the common fuel vapor duct enclosure 42.
- the arrangement of the fuel vapor ducts 34 and the primary pump 40 is such that fluid passes from the filter input port 32 through the fuel vapor ducts 34 to the primary filter output port 36 with a negligible pressure drop. This negligible pressure drop is largely attributable to the unobstructed nature of the flow paths 35.
- the primary pump 40 has a characteristic pumping capacity capable of generating a first volumetric fluid flow rate R Specifically, in some preferred embodiments of the present invention, the primary pump 40 has a characteristic pumping capacity capable of generating a fluid flow of between approximately 150 standard cubic feet per hour and approximately 1500 standard cubic feet per hour. In one embodiment of the present invention, the primary pump 40 has a characteristic pumping capacity capable of generating a fluid flow of approximately 320 standard cubic feet per hour.
- the secondary pump 50 has a characteristic pumping capacity capable of generating, in combination with any downstream pumps, a second volumetric fluid flow rate R 2 through the air permeable partition 37 to the secondary filter output port 38. Additionally, the secondary pump 50 has a characteristic pumping capacity capable of generating, in combination with the primary pump 40, a third volumetric fluid flow rate R 3 through the fuel vapor ducts 34 to the primary filter output port 36.
- Fuel storage systems employing vapor return hardware are characterized by an average net fluid volume return rate which is the difference between the volume of vapor returned to the storage tanks of the system and the volume of fluid dispensed to a fuel receiving tank or lost to the ambient.
- the volume of returned vapor tends to pressurize the storage system.
- the second volumetric fluid flow rate R 2 is selected such that it is greater than a characteristic average net fluid volume return rate of the fuel storage system to ensure that harmful pollutants are not vented to the ambient due to over pressurization, and to ensure that the filter system 16 of the present invention operates at maximum efficiency.
- the second volumetric fluid flow rate R 2 is approximately 40 standard cubic feet per hour.
- the first volumetric fluid flow rate R ⁇ is preferably approximately two to eight times the value of the second volumetric fluid flow rate R 2 .
- the specific value of the selected second volumetric fluid flow rate R 2 is largely dependent upon the average fuel dispensing rate of the particular fuel storage system, however, it is contemplated by the present invention that, in many preferred embodiments of the present invention, the second volumetric fluid flow rate R 2 is between approximately 15 standard cubic feet per hour and approximately 150 standard cubic feet per hour.
- the characteristics of the filter system 16 of the present invention allow the secondary pump 50 to be designed to create a pressure drop of about 50 kPa across the air-permeable partition 37.
- the secondary pump 50 may be designed to create a pressure drop of between approximately 25 kPa and approximately 75 kPa or, more preferably, between approximately 37.5 kPa and approximately 62.5 kPa across the air- permeable partition 37. All of these values represent a significant departure from the storage system of U.S. Patent No. 5,571 ,310, where harmful VOC's from a storage system, as opposed to non-polluting air components from the storage system, are drawn through a membrane by using a vacuum pump to create a pressure drop of about one atmosphere (100 kPa) across the membrane.
- additional secondary pumps 50', 50" are employed in the filter system 16 of the present invention.
- the first filter assembly 30, the primary pump 40, and the secondary pump 50 are substantially as described above.
- the fuel storage system 10 comprises two additional filter assemblies 30', 30" connected in series such that: (i) the secondary pump 30 has a characteristic pumping capacity capable of generating a second volumetric fluid flow rate R 2 ' through the air permeable partition 37 to the secondary filter output port 38, and capable of generating, in combination with the primary pump 40, a third volumetric fluid flow rate R 3 ' through the primary filter output port 36; (ii) the first additional secondary pump 50' has a characteristic pumping capacity capable of generating a fourth volumetric fluid flow rate R 4 ' through an additional air permeable partition 37 to an additional secondary filter output port 38', and capable of generating, in combination with the secondary pump 50, a fifth volumetric fluid flow rate R 5 ' through an additional primary filter output port 36'; (iii) the second additional secondary pump 50" has a characteristic pumping capacity capable of generating a sixth volumetric fluid flow rate R 6 ' through a second additional air permeable partition 37 to a second additional secondary filter output port 38" coupled to the air exhaust port 14,
- An additional filter input port 32' is coupled to the secondary filter output port 38 and a second additional filter input port 32" is coupled to the additional secondary filter output port 38'.
- An additional primary filter output port 36' and a second additional primary filter output port 36" are coupled to the pollutant return port 22.
- the volumetric fluid flow rate through the air exhaust port 14 is selected such that it is greater than a characteristic average net fluid volume return rate of the fuel storage system 10 to ensure that harmful pollutants are not vented to the ambient due to over pressurization, and to ensure that the filter system 16 of the present invention operates at maximum efficiency.
- the specific value of the selected second volumetric fluid flow rate R 2 is largely dependent upon the average fuel dispensing rate of the particular fuel storage system, however, it is contemplated by the present invention that, in many preferred embodiments of the present invention, the volumetric fluid flow rate through the air exhaust port 14 is between approximately 15 standard cubic feet per hour and approximately 150 standard cubic feet per hour, or, more specifically, 40 standard cubic feet per hour.
- the primary filter pump 40, the secondary filter pump 50, and the additional secondary pump 50' are preferably characterized by respective pumping capacities capable of generating a volumetric fluid flow rate through the air exhaust port 14 greater than the characteristic average net fluid volume return rate of the system.
- the additional secondary pumps 50', 50" may be designed to create a pressure drop of between approximately 25 kPa and approximately 75 kPa or, more preferably, between approximately 37.5 kPa and approximately 62.5 kPa across the respective air- permeable partitions 37.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69931197T DE69931197T2 (en) | 1999-08-06 | 1999-08-06 | FUEL LOCKING DEVICE WITH FILTER ARRANGEMENT BEFORE THE BLEEDING OPENING |
EP99939071A EP1278698B1 (en) | 1999-08-06 | 1999-08-06 | Fuel storage system with vent filter assembly |
AU53428/99A AU5342899A (en) | 1999-08-06 | 1999-08-06 | Fuel storage system with vent filter assembly |
PCT/US1999/017914 WO2001010770A1 (en) | 1999-08-06 | 1999-08-06 | Fuel storage system with vent filter assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1999/017914 WO2001010770A1 (en) | 1999-08-06 | 1999-08-06 | Fuel storage system with vent filter assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001010770A1 true WO2001010770A1 (en) | 2001-02-15 |
Family
ID=22273348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/017914 WO2001010770A1 (en) | 1999-08-06 | 1999-08-06 | Fuel storage system with vent filter assembly |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1278698B1 (en) |
AU (1) | AU5342899A (en) |
DE (1) | DE69931197T2 (en) |
WO (1) | WO2001010770A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993022031A1 (en) * | 1992-04-27 | 1993-11-11 | Gkss-Forschungszentrum Geesthacht Gmbh | Process and device for separating gas mixtures formed above liquids |
US5305807A (en) * | 1993-04-22 | 1994-04-26 | Healy Systems, Inc. | Auxiliary vapor recovery device for fuel dispensing system |
US5626649A (en) * | 1995-05-12 | 1997-05-06 | Gilbarco Inc. | Volatile organic chemical tank ullage pressure reduction |
GB2311768A (en) * | 1996-04-03 | 1997-10-08 | Dresser Ind | Petrol dispensing and vapour recovery system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5876604A (en) * | 1996-10-24 | 1999-03-02 | Compact Membrane Systems, Inc | Method of gasifying or degasifying a liquid |
US5914154A (en) * | 1997-05-30 | 1999-06-22 | Compact Membrane Systems, Inc. | Non-porous gas permeable membrane |
-
1999
- 1999-08-06 WO PCT/US1999/017914 patent/WO2001010770A1/en active IP Right Grant
- 1999-08-06 AU AU53428/99A patent/AU5342899A/en not_active Abandoned
- 1999-08-06 EP EP99939071A patent/EP1278698B1/en not_active Expired - Lifetime
- 1999-08-06 DE DE69931197T patent/DE69931197T2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993022031A1 (en) * | 1992-04-27 | 1993-11-11 | Gkss-Forschungszentrum Geesthacht Gmbh | Process and device for separating gas mixtures formed above liquids |
US5305807A (en) * | 1993-04-22 | 1994-04-26 | Healy Systems, Inc. | Auxiliary vapor recovery device for fuel dispensing system |
US5626649A (en) * | 1995-05-12 | 1997-05-06 | Gilbarco Inc. | Volatile organic chemical tank ullage pressure reduction |
GB2311768A (en) * | 1996-04-03 | 1997-10-08 | Dresser Ind | Petrol dispensing and vapour recovery system |
Also Published As
Publication number | Publication date |
---|---|
AU5342899A (en) | 2001-03-05 |
DE69931197T2 (en) | 2007-02-22 |
EP1278698A1 (en) | 2003-01-29 |
EP1278698B1 (en) | 2006-05-03 |
DE69931197D1 (en) | 2006-06-08 |
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