US2947379A - Petroleum vapor recovery system - Google Patents
Petroleum vapor recovery system Download PDFInfo
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- US2947379A US2947379A US730012A US73001258A US2947379A US 2947379 A US2947379 A US 2947379A US 730012 A US730012 A US 730012A US 73001258 A US73001258 A US 73001258A US 2947379 A US2947379 A US 2947379A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/30—Recovery of escaped vapours
Definitions
- This invention relates to a method and apparatus for the recovery of hydrocarbon vapors which evolve from crude petroleum liquid in containers, or tanks.
- the products of oil wells often contain a large amount of the lightest gases, such as methane, ethane, propane and some butanes which will not remain in a liquid phase under storage conditions.
- these lighter gases boil. In boiling, these lighter fractions of hydrocarbons drive off a finite quantity of the heavier valuable fractions which could otherwise be stored in a liquid state. It is very desirable that these heavier fractions of hydrocarbons be returned to a liquid phase, within the container, in order to maintain the gravity of the crude petroleum at its maximum value. Further, it is desirable to compress the lighter fractions so they can be received by a gasoline plant.
- a primary object of the present invention is to withdraw vapors which evolve from crude petroleum and condense and absorb them in a liquid so they can be returned to the body of crude petroleum as a liquid phase.
- Another object is to withdraw both the vapors which evolve from crude petroleum and a portion of the liquid petroleum which is cooler than the vapors and compress the two phases together, returning the resulting liquid phase to-.the body of crude petroleum to maintain the gravity of the body at a maximum, and delivering the compressed vapor phase to a gasoline plant.
- Another object of the invention is to withdraw vapors which evolve from a container of crude petroleum while maintaining a predetermined range of container pressure and returning the vapor to the container as a liquid phase to maintain the gravity of the crude petroleum at its maximum value.
- the present invention contemplates the incorporation of a liquid sealed centrifugal displacement type of vapor compressor in a system for drawing evolved vapors from a container of liquid petroleum.
- the vapors are compressed by liquid as a piston. Additionally, the vapors are absorbed, to a degree, by the cooler liquid piston.
- the compressed liquid and vapor phases are then separated, the liquid and its absorbed vapors being inserted into the body of liquid petroleum in the container and the compressed vapors being routed to a point of use, such as a gasoline plant.
- the invention further contemplates a system for drawing evolved hydrocarbon vapors and cooler liquid petroleum from a container of liquid petroleum and compressing the two phases together when the container pressure is within predetermined limits.
- a separator vessel receives and divides'the compressed phases.
- a conduit system is provided to return the liquid petroleum and absorbed vapor to the container to maintain the gravity of the liquid petroleum at its maximum value and to pass the compressed vapor to a point of use, such as a gasoline plant.
- the invention further contemplates the petroleum vapor recovery system including a switch responsive to container i the compressor is started and closed when the compressor is stopped. Further, a valve is provided to insure suflicient sealing liquid petroleum is provided during start-up of the system to the compressor. Further, a valve is provided to prevent flooding of the compressor and separator when the system is stopped. Further a valve is arranged to control the by-pass of pressure output of the compressor around to the compressor input under the direction of the input pressure to the compressor to prevent container pressure being reduced until air is vented into the tank. Fun ther, a system is provided to introduce vapor from a second source into the container, preventing the container pressure being reduced until air is vented into the tank.
- a separator 1 is indicated, receiving a well stream through conduit 2.
- the liquid phase from this separator 1 is indicated as being removed through conduit 3.
- the vapor phase is removed through conduit 4.
- the liquid phase of conduit 3 may require further treatment.
- the liquid hydrocarbon content of conduit 3 is ultimately placed within tank 5.
- valve 6 a valve to atmosphere which will function to vent and admit air to tank 5 only as a safety precaution. Normally vent 6 will be closed. However, should the capacity of the repressuring means for the tank 5 be exceeded, the valve 6 can be set to admit air to the tank at a predetermined minimum pressure. Should the capacity of the system for drawing ofi vapor be exceeded, and pressure build up to a predetermined maximum, valve 6 can be also set to open and relieve the excessive pressure to atmosphere.
- the present invention provides a conduit 10 through which the evolved vapors are drawn during the period the tank pressure is in a predetermined range.
- Conduit 11 is also provided, near the bottom of tank 5, to draw oil a portion of the liquid hydrocarbons which are cooler than the vapor. The liquid and vapor phases are brought together in a compressor 12 of particular form and function.
- compressor 12 is of a form which utilizes the relatively cooler liquid hydrocarbons from conduit 11 as a piston to compress the vapor phase of conduit 10.
- the liquid absorbs a significant portion of the vapors, efiectively returning them to liquid form.
- the cooler temperature of the liquid hydrocarbon piston causes the compressed vapors evolved from the top of tank 5 to condense to liquid form.
- the two phases, compressed to a pressure higher than that of the tank are taken to a separator 13.
- the vapor phase is removed through conduit 14 and the liquid phase is removed through conduit 15.
- the liquid phase now containing substantially all of the valuable, storable, heavy ends boiled from the liquid of tank 5, is returned to the bottom of tank 5 atthe higher pressure and temperature intermediate the vapor tank 5.
- the temperature of liquid phase of conduit 15 is intermediate that of the vapor at the top of the tank and liquid at the bottom by reason of the heat added by compression in 12.
- the heavier hydrocarbon fractions, returned to the tank under these conditions of. temperature and pressure, will have a tendency to remain in their liquid state.
- the compressor is considered in its particular form and function which enters into the combination to produce the desirable new result attained by the invention.
- the structure comprises a round rotor with curved blades 16 forming a series of chambers, open at the bottom, and revolving freely in an elliptical casing partially filled with liquid.
- the rotor revolves it carries the liquid with it, resulting in a solid liquid ring .revolvng in the casing at the same speed as the rotor.
- the q d must ernat ly nter an ll the cham ers etween blades 16, and then leave them, in a mntinuous .cycle.
- the liquid leaves the rotor chambers it draws in vapor through ports 17 in the center of the rotor, connected with the pump inlet.
- the vapor in the chamber is forced out through ports 18 connected with the pump outlet.
- conduit 4 a regulator as shown 7 in conduit 4 can be provided to permit the flow of vapor from top of separator 1 to maintain t e pressure above the minimum value.
- a primary guard of minimum tank pressure is provided with by-pass conduit 21.
- Conduit 21 connects between vapor output conduit 14 andyapor inlet conduit 10.
- a regulator valve 22, provided in this conduit 21, is responsive to the tank ,5 pressure.
- regulator 22 is sensitive to the tank pressure in order to prevent its value decreasing to where air is drawn into tank 5.
- the circulation rate needed through conduit 21 is fairly low .to provide'the protection and it is logical to provide it from conduit 14 which is usually at Ya that carried in separator 1.
- Valve 25 is located in conduit '11 to control the flow of liquid hydrocarbons to the compressor 12 as seal fluid. Positioning of valve 25 is indicated as established by the control system between switch 2%) and motor '19.
- valve 25 represents one means of preventing flooding. Valve 25 is closed by switch 20 when motor 19 is stopped and flooding is ,etfectively prevented.
- Valve 25 may not close soon .enough to prevent this pressure driving the liquid back into. tank 5.
- Check valve 26 is provided on the opposite side of valve 25, from compressor 12, to prevent this result.
- valve 25 Before start-up, the liquid in compressor 12 may have drained into separator 13.
- the compressor would be quickly damaged by running dry, or even partially dry, before valve 25 can be opened to pass liquid from tank 5 to the casing of the compressor. Therefore, it is desirable to provide a by-pass conduit and valve 27 from between valve 25 and the compressor to conduit 15. This valve can be automatically opened when the system shuts down and automatically energized from the pressure switch 20, through a time delay relay 27A, to close after a period of time necessary to assure that valve 25 has opened.
- liquid hydrocarbons have been described for use as the liquid seal-piston of compressor.
- liquids from other sources Any liquid which will function to absorb the hydrocarbon vapor of conduit 10, condense unabsorbed vapor and compress the remains of the vapor and which can be introduced into the liquid .of tank 5 will carryout the objects of the invention.
- a separate pressure source may be provided to bring the liquid to the compressor.
- the preferred embodiment illustrated uses the liquid hydrocarbons of tank 5, with its head, because of their ready availability.
- a vapor recovery system for containers of liquid hydrocarbons including,
- a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors
- valve in the second conduit which is actuated when the motive means is actuated to open the second conduit
- a process for recovering hydrocarbon vapors evolved from liquid hydrocarbons which includes,
- a vapor recovery system for containers of liquid hydrocarbons including,
- a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors
- a normally closed pressure regulator valve in the third conduit responsive to pressure on the inlet side of the compressor to open the third conduit when the inlet pressure falls below a predetermined minimum value.
- a process for recovering hydrocarbon vapors evolved from liquid hydrocarbons which includes,
- a vapor recovery system for containers of liquid hydrocarbons including,
- a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors
- a normally closed pressure regulator valve in the third conduit responsive to pressure on the inlet side of the compressor to open the third conduit when the inlet pressure falls below a predetermined minimum value
- a process for recovering hydrocarbon vapors evolved from liquid hydrocarbons which includes,
- a vapor recovery system for containers of liquid hydrocarbons including, i
- a second conduit for drawing a portion of the liquid hydrocarbons from the container.
- a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors
Description
Aug. 2, 1960 GASOLINE PLAN T WEL L J TPfAM H. S. AUBREY PETROLEUM VAPOR RECOVERY SYSTEM Filed April 21, 1958 INVENTOR. Herman 6'. Aubrey United States Patent 2 ,947,379 PETROLEUM VAPOR RECOVERY SYSTEM Herman S. Aubrey, Tulsa, Okla., assignor, by mesne assignments, to National Tank Company, Tulsa, Okla., a corporation of Nevada Filed Apr. 21, 1958, Ser. No. 730,012
7 Claims. (Cl. 183-2) This invention relates to a method and apparatus for the recovery of hydrocarbon vapors which evolve from crude petroleum liquid in containers, or tanks.
The products of oil wells often contain a large amount of the lightest gases, such as methane, ethane, propane and some butanes which will not remain in a liquid phase under storage conditions. When these well products are placed in containers, or tanks, for any length of time, these lighter gases boil. In boiling, these lighter fractions of hydrocarbons drive off a finite quantity of the heavier valuable fractions which could otherwise be stored in a liquid state. It is very desirable that these heavier fractions of hydrocarbons be returned to a liquid phase, within the container, in order to maintain the gravity of the crude petroleum at its maximum value. Further, it is desirable to compress the lighter fractions so they can be received by a gasoline plant.
A primary object of the present invention is to withdraw vapors which evolve from crude petroleum and condense and absorb them in a liquid so they can be returned to the body of crude petroleum as a liquid phase.
Another object is to withdraw both the vapors which evolve from crude petroleum and a portion of the liquid petroleum which is cooler than the vapors and compress the two phases together, returning the resulting liquid phase to-.the body of crude petroleum to maintain the gravity of the body at a maximum, and delivering the compressed vapor phase to a gasoline plant.
Another object of the invention is to withdraw vapors which evolve from a container of crude petroleum while maintaining a predetermined range of container pressure and returning the vapor to the container as a liquid phase to maintain the gravity of the crude petroleum at its maximum value.
The present invention contemplates the incorporation of a liquid sealed centrifugal displacement type of vapor compressor in a system for drawing evolved vapors from a container of liquid petroleum. The vapors are compressed by liquid as a piston. Additionally, the vapors are absorbed, to a degree, by the cooler liquid piston. The compressed liquid and vapor phases are then separated, the liquid and its absorbed vapors being inserted into the body of liquid petroleum in the container and the compressed vapors being routed to a point of use, such as a gasoline plant.
The invention further contemplates a system for drawing evolved hydrocarbon vapors and cooler liquid petroleum from a container of liquid petroleum and compressing the two phases together when the container pressure is within predetermined limits. A separator vessel receives and divides'the compressed phases. A conduit system is provided to return the liquid petroleum and absorbed vapor to the container to maintain the gravity of the liquid petroleum at its maximum value and to pass the compressed vapor to a point of use, such as a gasoline plant.
The invention further contemplates the petroleum vapor recovery system including a switch responsive to container i the compressor is started and closed when the compressor is stopped. Further, a valve is provided to insure suflicient sealing liquid petroleum is provided during start-up of the system to the compressor. Further, a valve is provided to prevent flooding of the compressor and separator when the system is stopped. Further a valve is arranged to control the by-pass of pressure output of the compressor around to the compressor input under the direction of the input pressure to the compressor to prevent container pressure being reduced until air is vented into the tank. Fun ther, a system is provided to introduce vapor from a second source into the container, preventing the container pressure being reduced until air is vented into the tank.
Other objects, advantages and features of this invention will appear from a consideration of the drawings together with the written specification and claims.
The single figure of drawings is a somewhat diagrammatic illustration of a complete system embodying the preferred form of the invention.
Referring to the unit and connections of the drawing, a separator 1 is indicated, receiving a well stream through conduit 2. The liquid phase from this separator 1 is indicated as being removed through conduit 3. The vapor phase is removed through conduit 4. The liquid phase of conduit 3 may require further treatment. The liquid hydrocarbon content of conduit 3 is ultimately placed within tank 5.
At 6 is shown a valve to atmosphere which will function to vent and admit air to tank 5 only as a safety precaution. Normally vent 6 will be closed. However, should the capacity of the repressuring means for the tank 5 be exceeded, the valve 6 can be set to admit air to the tank at a predetermined minimum pressure. Should the capacity of the system for drawing ofi vapor be exceeded, and pressure build up to a predetermined maximum, valve 6 can be also set to open and relieve the excessive pressure to atmosphere.
When tank, or container, 5 has a substantial body of liquid hydrocarbons placed therein, many of the lighter fractions boil, or evolve, as vapors at storable condition. The variation of temperatures over a 24 hour cycle will cause the tank to breathe. Breathing will result in alternately losing valuable hydrocarbon fractions to atmosphere and introducing air into the tank, increasing fire hazard and corrosion possibility. The present invention provides a conduit 10 through which the evolved vapors are drawn during the period the tank pressure is in a predetermined range. Conduit 11 is also provided, near the bottom of tank 5, to draw oil a portion of the liquid hydrocarbons which are cooler than the vapor. The liquid and vapor phases are brought together in a compressor 12 of particular form and function.
In general, compressor 12 is of a form which utilizes the relatively cooler liquid hydrocarbons from conduit 11 as a piston to compress the vapor phase of conduit 10. In compressing the vapors, the liquid absorbs a significant portion of the vapors, efiectively returning them to liquid form. Additionally, the cooler temperature of the liquid hydrocarbon piston causes the compressed vapors evolved from the top of tank 5 to condense to liquid form. The two phases, compressed to a pressure higher than that of the tank are taken to a separator 13. The vapor phase is removed through conduit 14 and the liquid phase is removed through conduit 15.
The liquid phase, now containing substantially all of the valuable, storable, heavy ends boiled from the liquid of tank 5, is returned to the bottom of tank 5 atthe higher pressure and temperature intermediate the vapor tank 5. The temperature of liquid phase of conduit 15 is intermediate that of the vapor at the top of the tank and liquid at the bottom by reason of the heat added by compression in 12. The heavier hydrocarbon fractions, returned to the tank under these conditions of. temperature and pressure, will have a tendency to remain in their liquid state. I
From the foregoing broad consideration of the operation of the system, the compressor is considered in its particular form and function which enters into the combination to produce the desirable new result attained by the invention. Basically, the structure comprises a round rotor with curved blades 16 forming a series of chambers, open at the bottom, and revolving freely in an elliptical casing partially filled with liquid. As the rotor revolves it carries the liquid with it, resulting in a solid liquid ring .revolvng in the casing at the same speed as the rotor.
Since the casing is elliptical and the'rotor round, the q d must ernat ly nter an ll the cham ers etween blades 16, and then leave them, in a mntinuous .cycle. At the points where the liquid leaves the rotor chambers it draws in vapor through ports 17 in the center of the rotor, connected with the pump inlet. As the liquid-is forced by the converging casing to neenter the rotor chambers the vapor in the chamber is forced out through ports 18 connected with the pump outlet.
One possible form of motive power for the compressor 12 is illustrated as provided by an electric motor 1; 9,'
reduced to a predetermined lower value, the
permissible to prevent air being vented into the tank. Should switch 20 become defective, a regulator as shown 7 in conduit 4 can be provided to permit the flow of vapor from top of separator 1 to maintain t e pressure above the minimum value. A primary guard of minimum tank pressure is provided with by-pass conduit 21. Conduit 21 connects between vapor output conduit 14 andyapor inlet conduit 10. A regulator valve 22, provided in this conduit 21, is responsive to the tank ,5 pressure. As with the regulator in conduit 4, regulator 22 is sensitive to the tank pressure in order to prevent its value decreasing to where air is drawn into tank 5. Generally, it appears desirable to set the operative pressure value of the conduit 4 regulator lower than that of regulator 22. The circulation rate needed through conduit 21 is fairly low .to provide'the protection and it is logical to provide it from conduit 14 which is usually at Ya that carried in separator 1.
'The start-up and shut-down conditions ,of the system are next considered. Valve 25 is located in conduit '11 to control the flow of liquid hydrocarbons to the compressor 12 as seal fluid. Positioning of valve 25 is indicated as established by the control system between switch 2%) and motor '19.
When the complete system is shut down for a period, the pressure built up by the compressor 12, in separator 13 and in conduit 14, back of the check valve 14A, may "be bled ofl through at least the packing glands of compressor 12. If this occurs, the head of liquid in tank 5 may cause the liquid to flood the compressor ,and separator. Therefore, valve 25 represents one means of preventing flooding. Valve 25 is closed by switch 20 when motor 19 is stopped and flooding is ,etfectively prevented.
pressure lower than ,Also, when the complete system is shut down, an imdownstream of compressor 12 into conduit 11. Valve 25 may not close soon .enough to prevent this pressure driving the liquid back into. tank 5. Check valve 26 is provided on the opposite side of valve 25, from compressor 12, to prevent this result.
Before start-up, the liquid in compressor 12 may have drained into separator 13. The compressor would be quickly damaged by running dry, or even partially dry, before valve 25 can be opened to pass liquid from tank 5 to the casing of the compressor. Therefore, it is desirable to provide a by-pass conduit and valve 27 from between valve 25 and the compressor to conduit 15. This valve can be automatically opened when the system shuts down and automatically energized from the pressure switch 20, through a time delay relay 27A, to close after a period of time necessary to assure that valve 25 has opened.
Heretofore, only liquid hydrocarbons have been described for use as the liquid seal-piston of compressor. However, it is to be understood that it is within the scope of the invention to employ liquids from other sources for this purpose. Any liquid which will function to absorb the hydrocarbon vapor of conduit 10, condense unabsorbed vapor and compress the remains of the vapor and which can be introduced into the liquid .of tank 5 will carryout the objects of the invention. Further, it is conceivable that a separate pressure source may be provided to bring the liquid to the compressor. The preferred embodiment illustrated uses the liquid hydrocarbons of tank 5, with its head, because of their ready availability.
From the foregoing it will be seen that this invention is one well adapted to attain all of the ends and objects hereinabove set forth, together with other advantages which are obvious and which are inherent to the apparatus.
It will be understood that certain features and sub- .combinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
As many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.
The invention having been described, what is claimed 1. A vapor recovery system for containers of liquid hydrocarbons including,
a container for the liquid hydrocarbons,
a first conduit for drawing evolved vapors liquid hydrocarbons,
a second conduit for drawing a portion .of the hydrocarbons from the container,
a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors,
a valve in the second conduit which is actuated when the motive means is actuated to open the second conduit When the motive means starts and close the second conduit when the motive means stops,
and means for separating vthewliquid and the vapor and returning the liquid and absorbed vaporsto the container.
2. A process for recovering hydrocarbon vapors evolved from liquid hydrocarbons, which includes,
collecting .vapors from the liquid hydrocarbons,
withdrawing a portion of the liquid hydrocarbons which are cooler than the vapors, 1
utilizing the portion of the cooler liquid hydrocarbons from the liquid to simultaneously condense a first portion of the vapor and absorb a second portion of the vapor and compress a third portion of the vapor, I returning the compressed third portion of the vapor to the collected vapors from the liquid hydrocarbons when the pressure of the collected vapors falls below a predetermined minimum value,
separating the liquid hydrocarbon and absorbed vapor from the compressed vapor,
and returning the liquid hydrocarbon and absorbed vapor to the liquid hydrocarbons from which the-vapors evolved.
3. A vapor recovery system for containers of liquid hydrocarbons including,
a container for the liquid hydrocarbons,
a first conduit for drawing evolved vapors from the liquid hydrocarbons,
a second conduit for drawing 'a portion of the liquid hydrocarbons from the container,
a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors,
a third conduit between the discharge side of the compressor and the intake side,
a normally closed pressure regulator valve in the third conduit responsive to pressure on the inlet side of the compressor to open the third conduit when the inlet pressure falls below a predetermined minimum value.
and means for separating the liquid and the vapor at the elevated pressure and returning the liquid to the container.
4. A process for recovering hydrocarbon vapors evolved from liquid hydrocarbons, which includes,
collecting vapors from the liquid hydrocarbons,
withdrawing a portion of the liquid hydrocarbons which are cooler than the vapors,
utilizing the portion of the cooler liquid hydrocarbons to simultaneously condense a first portion of the vapor and absorb a second portion of the vapor and compress a third portion of the vapor,
returning the compressed third portion of the vapor to the collected vapors from the liquid hydrocarbons when the pressure of the collected vapors falls belows a predetermined minimum value,
- adding vapor to the collected vapors from the liquid hydrocarbons when the pressure of the collected vapors falls to a predetermined value below the predetermined minimum value,
separating the liquid hydrocarbon and absorbed vapor from the compressed vapor,
and returning the liquid hydrocarbon and absorbed vapor to the liquid hydrocarbons from which the vapors evolved.
5. A vapor recovery system for containers of liquid hydrocarbons including,
a container for the liquid hydrocarbons,
a first conduit for drawing evolved vapors from the liquid hydrocarbons,
a second conduit for drawing a portion of the liquid hydrocarbons from the container,
a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors,
a third conduit between the discharge side of the compressor and the intake side,
a normally closed pressure regulator valve in the third conduit responsive to pressure on the inlet side of the compressor to open the third conduit when the inlet pressure falls below a predetermined minimum value,
means for repressuring the container with vapor when the vapor pressure falls to a predetermined value below the predetermined minimum value at which the regulator valve in the third conduit opens the third conduit,
and means for separating the liquid and the vapor at the elevated pressure and reutnring the liquid to the container.
6. A process for recovering hydrocarbon vapors evolved from liquid hydrocarbons, which includes,
collecting vapors from the liquid hydrocarbons,
withdrawing a portion of the liquid hydrocarbons which are cooler than the vapors,
utilizing the portion of the cooler liquid hydrocarbons to simultaneously condense a first portion of the vapor and absorb a second portion of the vapor and compress a third portion of the vapor,
circulating cooler liquid hydrocarbons of the portion utilized to simultaneously condense and absorb and compress the vapor through the condensing and absorbing and compressing process for an initial period during startup of the recovery process,
separating the liquid hydrocarbon and absorb vapor from the compressed Vapor,
and returning the liquid hydrocarbon and absorbed vapor to the liquid hydrocarbons from which the vapors evolved.
7. A vapor recovery system for containers of liquid hydrocarbons including, i
a container for the liquid hydrocarbons,
a first conduit for drawingevolved vapors from the liquid hydrocarbons,
a second conduit for drawing a portion of the liquid hydrocarbons from the container.
a compressor powered by a motive means and utilizing the liquid as a piston to compress a portion of the evolved vapors to a pressure higher than that of the container and absorb a portion of the vapors,
"a means for separating the liquid and the vapor at the elevated pressure and retaining the liquid to the container,
and-a by-pass connection between the compressor intake and the separating means which is opened to circulate liquid from the separator through the compressor for an initial period during start-up of the system.
References Cited in the file of this patent UNITED STATES PATENTS 1,653,387 Brown Dec. 20, 1927 1,991,548 De Motte Feb. 19, 1935 2,013,167 Musto Sept. 3, 1935 2,126,367 Clawson et al. Aug. 9, 1938 2,765,045 Meyers Oct. 2, 1956 2,788,745 Jennings Apr. 6, 1957
Claims (1)
- 2. A PROCESS FOR RECOVERING HYDROCARBON VAPORS EVOLVED FROM LIQUID HYDROCARBONS, WHICH INCLUDES, COLLECTING VAPORS FROM THE LIQUID HYDROCARBONS, WITHDRAWING A PORTION OF THE LIQUID HYDORCARBONS WHICH ARE COOLER THAN THE VAPORS, UTILIZING THE PORTION OF THE COOLER LIQUID HYDROCARBONS TO SIMULTANEOUSLY CONDENSE A FIRST PORTION OF THE VAPOR AND ABSORB A SECOND PORTION OF THE VAPOR AND COMPRESS A THIRD PORTION OF THE VAPOR, RETURNING THE COMPRESSED THIRD PORTION OF THE VAPOR TO THE COLLECTED VAPORS FROM THE LIQUID HYDROCARBONS WHEN THE PRESSURE OF THE COLLECTED VAPORS FALLS BELOW A PREDETERMINE MINUM VALUE, SEPARATING THE LIQUID HYDROCARBON AND ABSORBED VAPOR FROM THE COMPRESSED VAPOR,
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US730012A US2947379A (en) | 1958-04-21 | 1958-04-21 | Petroleum vapor recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US730012A US2947379A (en) | 1958-04-21 | 1958-04-21 | Petroleum vapor recovery system |
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| US2947379A true US2947379A (en) | 1960-08-02 |
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Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3038285A (en) * | 1960-03-18 | 1962-06-12 | Chemical Construction Corp | Method for compressing urea synthesis off-gas |
| US3045716A (en) * | 1959-12-30 | 1962-07-24 | Ethyl Corp | Simultaneous evacuation of a vessel and separation of undesirable materials from vapors |
| US3135113A (en) * | 1959-07-13 | 1964-06-02 | Nat Tank Co | Methods and means for treating and automatically transferring custody of petroleum |
| US3290229A (en) * | 1962-01-25 | 1966-12-06 | Kenard D Brown | Apparatus for direct contact condensation of vapors |
| US3421289A (en) * | 1966-09-13 | 1969-01-14 | Nash Engineering Co | Vaporizable liquid storage receiver recovery method |
| US3648436A (en) * | 1970-03-26 | 1972-03-14 | Ingersoll Rand Res Inc | Gasoline vapor recovery |
| US3714790A (en) * | 1971-04-13 | 1973-02-06 | Fmc Corp | Apparatus and method for handling volatile liquids |
| US3763901A (en) * | 1971-01-25 | 1973-10-09 | C Viland | Method of preventing loss of hydrocarbons to atmosphere |
| US3771317A (en) * | 1970-12-07 | 1973-11-13 | Parker Hannifin Corp | Vapor recovery |
| US3778969A (en) * | 1972-04-12 | 1973-12-18 | Chicago Bridge & Iron Co | Ejector vapor recovery system for stored volatile liquids |
| US3778968A (en) * | 1972-08-10 | 1973-12-18 | Trimble J | Method and apparatus for controlling air pollution caused by volatile emissions from storage tanks and the like |
| FR2185440A1 (en) * | 1972-05-25 | 1974-01-04 | Ingersoll Rand Co | |
| US3881894A (en) * | 1972-10-05 | 1975-05-06 | George R Onufer | Vapor emission control system and method |
| US3994074A (en) * | 1975-04-18 | 1976-11-30 | W. R. Grace & Co. | Liquid seal pump with sulfuric acid dehumidification |
| US4027993A (en) * | 1973-10-01 | 1977-06-07 | Polaroid Corporation | Method and apparatus for compressing vaporous or gaseous fluids isothermally |
| US4170458A (en) * | 1977-10-25 | 1979-10-09 | Hartwick George J | Smoke eliminator method and apparatus |
| US4338101A (en) * | 1981-08-03 | 1982-07-06 | John Zink Company | Process and apparatus for recovering hydrocarbons from inert gas-hydrocarbon vapor mixtures |
| US4799940A (en) * | 1985-12-05 | 1989-01-24 | Gilbarco, Inc. | Centrifugal system with pump for separating air from fuel |
| US4948394A (en) * | 1984-09-07 | 1990-08-14 | Institut Francais Du Petrole | Process and device for compressing and transporting a gas containing a liquid fraction |
| US5076822A (en) * | 1990-05-07 | 1991-12-31 | Hewitt J Paul | Vapor recovery system |
| US5480475A (en) * | 1993-06-09 | 1996-01-02 | Callidus Technologies, Inc. | Vapor recovery system |
| US5863316A (en) * | 1997-07-21 | 1999-01-26 | Danieli Wean, Division Of Danieli Corporation | Recirculating fume scrubber system |
| US5871563A (en) * | 1995-05-22 | 1999-02-16 | Hoechst Aktiengesellschaft | Process for purifying inert gases |
| US6726750B2 (en) * | 2000-06-05 | 2004-04-27 | Ch2M Hill, Inc. | Apparatus and method for efficient recovery of volatile organic compounds |
| US20040221718A1 (en) * | 2001-10-31 | 2004-11-11 | Advanced Production And Loading As | Method for absorbing vapours and gasses from pressure vessels |
| US20090250472A1 (en) * | 2008-04-04 | 2009-10-08 | Cutts William T | Column vapor recovery |
| WO2012015377A1 (en) * | 2010-07-27 | 2012-02-02 | I.E.S. Consulting, Inc. | Apparatus and method of recovering vapors |
| US8206124B1 (en) * | 2007-06-20 | 2012-06-26 | Varani Frederick T | Oil-gas vapor collection, storage, and recovery system using a variable volume gas bag connected with a control switch |
| US8475966B2 (en) | 2003-09-25 | 2013-07-02 | IES Consulting, Inc. | Apparatus and method of recovering vapors |
| US8708663B1 (en) | 2007-06-20 | 2014-04-29 | Frederick T. Varani | Fugitive gas capture |
| US8992838B1 (en) | 2011-02-02 | 2015-03-31 | EcoVapor Recovery Systems, LLC | Hydrocarbon vapor recovery system |
| US9334109B1 (en) | 2012-02-02 | 2016-05-10 | EcoVapor Recovery Systems, LLC | Vapor recovery systems and methods utilizing selective recirculation of recovered gases |
| US9776155B1 (en) | 2012-02-02 | 2017-10-03 | EcoVapor Recovery Systems, LLC | Hydrocarbon vapor recovery system with oxygen reduction |
| KR20200141225A (en) * | 2019-06-10 | 2020-12-18 | 최영수 | Harmful mist emission suppressing device of storage tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3135113A (en) * | 1959-07-13 | 1964-06-02 | Nat Tank Co | Methods and means for treating and automatically transferring custody of petroleum |
| US3045716A (en) * | 1959-12-30 | 1962-07-24 | Ethyl Corp | Simultaneous evacuation of a vessel and separation of undesirable materials from vapors |
| US3038285A (en) * | 1960-03-18 | 1962-06-12 | Chemical Construction Corp | Method for compressing urea synthesis off-gas |
| US3290229A (en) * | 1962-01-25 | 1966-12-06 | Kenard D Brown | Apparatus for direct contact condensation of vapors |
| US3421289A (en) * | 1966-09-13 | 1969-01-14 | Nash Engineering Co | Vaporizable liquid storage receiver recovery method |
| US3648436A (en) * | 1970-03-26 | 1972-03-14 | Ingersoll Rand Res Inc | Gasoline vapor recovery |
| US3771317A (en) * | 1970-12-07 | 1973-11-13 | Parker Hannifin Corp | Vapor recovery |
| US3763901A (en) * | 1971-01-25 | 1973-10-09 | C Viland | Method of preventing loss of hydrocarbons to atmosphere |
| US3714790A (en) * | 1971-04-13 | 1973-02-06 | Fmc Corp | Apparatus and method for handling volatile liquids |
| US3778969A (en) * | 1972-04-12 | 1973-12-18 | Chicago Bridge & Iron Co | Ejector vapor recovery system for stored volatile liquids |
| FR2185440A1 (en) * | 1972-05-25 | 1974-01-04 | Ingersoll Rand Co | |
| US3947258A (en) * | 1972-05-25 | 1976-03-30 | Ingersoll-Rand Company | Vapor stripping and recovery method and apparatus |
| US3778968A (en) * | 1972-08-10 | 1973-12-18 | Trimble J | Method and apparatus for controlling air pollution caused by volatile emissions from storage tanks and the like |
| US3881894A (en) * | 1972-10-05 | 1975-05-06 | George R Onufer | Vapor emission control system and method |
| US4027993A (en) * | 1973-10-01 | 1977-06-07 | Polaroid Corporation | Method and apparatus for compressing vaporous or gaseous fluids isothermally |
| US3994074A (en) * | 1975-04-18 | 1976-11-30 | W. R. Grace & Co. | Liquid seal pump with sulfuric acid dehumidification |
| US4170458A (en) * | 1977-10-25 | 1979-10-09 | Hartwick George J | Smoke eliminator method and apparatus |
| US4338101A (en) * | 1981-08-03 | 1982-07-06 | John Zink Company | Process and apparatus for recovering hydrocarbons from inert gas-hydrocarbon vapor mixtures |
| US4948394A (en) * | 1984-09-07 | 1990-08-14 | Institut Francais Du Petrole | Process and device for compressing and transporting a gas containing a liquid fraction |
| US4799940A (en) * | 1985-12-05 | 1989-01-24 | Gilbarco, Inc. | Centrifugal system with pump for separating air from fuel |
| US5076822A (en) * | 1990-05-07 | 1991-12-31 | Hewitt J Paul | Vapor recovery system |
| US5480475A (en) * | 1993-06-09 | 1996-01-02 | Callidus Technologies, Inc. | Vapor recovery system |
| US5871563A (en) * | 1995-05-22 | 1999-02-16 | Hoechst Aktiengesellschaft | Process for purifying inert gases |
| US5863316A (en) * | 1997-07-21 | 1999-01-26 | Danieli Wean, Division Of Danieli Corporation | Recirculating fume scrubber system |
| US6726750B2 (en) * | 2000-06-05 | 2004-04-27 | Ch2M Hill, Inc. | Apparatus and method for efficient recovery of volatile organic compounds |
| US20040221718A1 (en) * | 2001-10-31 | 2004-11-11 | Advanced Production And Loading As | Method for absorbing vapours and gasses from pressure vessels |
| US7025807B2 (en) * | 2001-10-31 | 2006-04-11 | Advanced Production And Loading As | Method for absorbing vapors and gases from pressure vessels |
| US8475966B2 (en) | 2003-09-25 | 2013-07-02 | IES Consulting, Inc. | Apparatus and method of recovering vapors |
| US8708663B1 (en) | 2007-06-20 | 2014-04-29 | Frederick T. Varani | Fugitive gas capture |
| US8206124B1 (en) * | 2007-06-20 | 2012-06-26 | Varani Frederick T | Oil-gas vapor collection, storage, and recovery system using a variable volume gas bag connected with a control switch |
| US20090250472A1 (en) * | 2008-04-04 | 2009-10-08 | Cutts William T | Column vapor recovery |
| WO2012015377A1 (en) * | 2010-07-27 | 2012-02-02 | I.E.S. Consulting, Inc. | Apparatus and method of recovering vapors |
| US8992838B1 (en) | 2011-02-02 | 2015-03-31 | EcoVapor Recovery Systems, LLC | Hydrocarbon vapor recovery system |
| US9764255B1 (en) | 2011-02-02 | 2017-09-19 | EcoVapor Recovery Systems, LLC | Hydrocarbon vapor recovery system |
| US9334109B1 (en) | 2012-02-02 | 2016-05-10 | EcoVapor Recovery Systems, LLC | Vapor recovery systems and methods utilizing selective recirculation of recovered gases |
| US9776155B1 (en) | 2012-02-02 | 2017-10-03 | EcoVapor Recovery Systems, LLC | Hydrocarbon vapor recovery system with oxygen reduction |
| KR20200141225A (en) * | 2019-06-10 | 2020-12-18 | 최영수 | Harmful mist emission suppressing device of storage tank |
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