EP0779876B1 - Vorrichtung zur entsorgung von kraftstoffdämpfen mit verbesserter laufstabilität - Google Patents

Vorrichtung zur entsorgung von kraftstoffdämpfen mit verbesserter laufstabilität Download PDF

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Publication number
EP0779876B1
EP0779876B1 EP96924923A EP96924923A EP0779876B1 EP 0779876 B1 EP0779876 B1 EP 0779876B1 EP 96924923 A EP96924923 A EP 96924923A EP 96924923 A EP96924923 A EP 96924923A EP 0779876 B1 EP0779876 B1 EP 0779876B1
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EP
European Patent Office
Prior art keywords
pump
metering pump
recovery
regulator
recovery system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96924923A
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English (en)
French (fr)
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EP0779876A1 (de
Inventor
Sylvain Janssen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itron Soluciones de Medida Espana SA
Schlumberger SA
Original Assignee
Itron Soluciones de Medida Espana SA
Schlumberger SA
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Publication date
Application filed by Itron Soluciones de Medida Espana SA, Schlumberger SA filed Critical Itron Soluciones de Medida Espana SA
Publication of EP0779876A1 publication Critical patent/EP0779876A1/de
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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
    • B67D7/0478—Vapour recovery systems constructional features or components
    • B67D7/048—Vapour flow control means, e.g. valves, pumps
    • B67D7/0482—Vapour flow control means, e.g. valves, pumps using pumps driven at different flow rates
    • B67D7/0486—Pumps driven in response to electric signals indicative of pressure, temperature or liquid flow

Definitions

  • the present invention relates to a recovery system for hydrocarbon vapors released from vehicle tanks automobiles when delivering liquid fuel through to minus a distribution line, see the preamble of claim 1.
  • the distribution lines end with a flexible hose fitted at one end of a gun that the user introduces into the neck from the tank of his vehicle.
  • Vapor recovery therefore consists, in principle, of sucking out of the neck a volume of vapor which at all times must be equal to the volume of liquid fuel delivered.
  • the dispensing gun is fitted with a sleeve entering the outlet of the tank of the vehicle, and into which the upstream end of a recovery line on which a pump is placed suction which flows back to the fuel storage tank liquid the recovered hydrocarbon vapors. So that the recovery system works satisfactorily it must be able to vary the speed of rotation of the pump so that the instantaneous volume of sucked vapors equals the volume instant of dispensed liquid.
  • a known means to avoid these drawbacks consists in insert a gas flow meter into the recovery line possible association with a pressure sensor to control the speed of the circulation pump or the opening of a valve in order to obtain the desired vapor flow.
  • the technical problem to be solved by the object of the present invention is to provide a system for recovering hydrocarbon vapors released from vehicle tanks automobiles when delivering liquid fuel through to minus a distribution line, a system that would allow to obtain a good proportionality between the vapor flow at recover and the rotation speed of the circulation pump, like a vane, gear or rotary piston pump, without using a servo loop for this complex and expensive, such as that previously described in reference to the state of the art.
  • the solution to the technical problem posed consists, according to the present invention, in that said system comprises a pipe recovery, and a metering pump placed on said recovery line, driven by a motor with a substantially proportional speed of rotation at the volume flow rate of the liquid fuel delivered in the line distribution, said system being characterized in that said metering pump is mounted in series with a power pump via a regulator-regulator differential pressure capable of maintaining a difference low value pressure between pump outlet and inlet dosing, so as to obtain a volume flow of vapors substantially proportional to the speed of rotation imposed by said motor.
  • the dosing pump is made metrological by the presence at its terminals of the regulator-regulator which requires said pump to operate under very low differential pressure and if possible zero, internal leaks becoming negligible.
  • the flow volume of vapors being proportional to the speed of rotation of the motor which itself is proportional to the volume flow of liquid fuel, we understand that it is possible to realize the desired equality between the vapor and liquid flow rates, and this whatever the flow rate, the nature of the gas, the state of wear of the pump or the hydraulic resistance of the recovery line.
  • the metering pump can only supply a limited power to ensure the vapor circulation. She must be helped in this by the pump power, capable of ensuring in all circumstances at least the maximum flow requested.
  • the dosing pump is therefore capable of dosing metrologically the volumes of vapors passing through all recovery system and somehow play a role comparable to that of a flow control valve but with however much higher metrological qualities thanks to the absence of relaxation.
  • the metering pump drive motor provides power, a fraction of which is intended to overcome friction mechanical parts of the pump, the rest being used to circulate and transfer the recovered vapors under very low pressure differential and therefore at very low power.
  • said metering pump is mounted in series downstream of the power pump.
  • a pressure regulator is located downstream of the metering pump and said differential pressure regulator.
  • said pump metering is connected in series upstream of the power pump, a pressure regulator being arranged upstream of the pump metering and said differential pressure regulator.
  • the latter embodiment has the advantage that, said distribution pipes being multiple, the pump power is unique and placed on a portion common to respective recovery lines, downstream of said regulator-regulators differential pressure.
  • a preferred assembly of the recovery system the invention leading to a simple and inexpensive embodiment is that said power pump and said pump storage are driven by a common motor at a speed of rotation substantially proportional to said volume flow of liquid fuel delivered, the power pump having a volume cyclic greater than the cyclic volume of the metering pump.
  • Figure 1 is a diagram of a first embodiment of the recovery system according to the invention.
  • Figure 2 is a diagram of a second embodiment of the recovery system according to the invention.
  • Figure 3 is a diagram of the recovery system of the Figure 2, with multiple distribution and recovery lines.
  • FIG. 4 is a diagram of an alternative embodiment of the recovery system of figure 1.
  • FIG. 1 shows a system for recovering the hydrocarbon vapors released from motor vehicle tanks during the delivery of liquid fuel through a distribution pipe 19.
  • the upstream end of said distribution pipe 19 is immersed in a tank 1 for storing liquid fuel, which is sucked in by a pump 2 delivering a volume flow rate Q v .
  • the liquid fuel passes through a measurer 3, placed in the distributor, capable of producing, for example, the rotational movement of an axis at a substantially proportional angular speed Q v .
  • a pulse generator 4 coupled to the measurer 3, such as an optical disc, supplies pulses whose frequency N is proportional to the volume flow rate.
  • the distribution pipe 19 takes the form of a flexible pipe terminated by a gun 5 of the vapor recovery type in that it is provided with a sleeve, not shown, responsible for preventing dissipation in the atmosphere of the hydrocarbon vapors released from the tank as it fills with fuel.
  • Said pistol is the starting point of a recovery 6 pipe on which is placed a power pump 7 which can be of any type, for example with pallets as in the figure 1.
  • Said power pump 7 is actuated by a motor 8 to an angular speed ⁇ so as to provide almost at any time all the power necessary for the circulation of vapors at recover, without necessarily presenting good quality metrological as to its flow / speed ratio ⁇ of rotation.
  • the angular speed ⁇ is maintained at a value such that: ⁇ V ⁇ > ⁇ o q vo ⁇ o and ⁇ being respectively the density of the hydrocarbon vapors at atmospheric pressure p o and at the inlet of the pump 7, and q vo the flow rate of the vapors at atmospheric pressure which one seeks to make equal to the flow rate Q v of liquid fuel in the distribution line 19.
  • Downstream of the power pump 7 is mounted in series a metering pump 10 of the volumetric type driven by a motor 11 controlled by an amplifier 14 capable of transforming the impulse signals from the generator 4 into power signals capable of supplying the motor 11, for example of the step-by-step type, and rotate it at an angular speed ⁇ thereby proportional to the volume flow rate Q v of the liquid fuel delivered in the distribution line 19.
  • the metering pump 10 is mounted in downstream series on the power pump 7 by means of a differential pressure regulator 9, of a conventional model, which receives from said pump 7 of power of the hydrocarbon vapors under a pressure P greater than the initial pressure p o .
  • the differential pressure ⁇ p between the inlet and the outlet of the metering pump 10 is maintained at a very low value ⁇ ⁇ .
  • the pressure in chamber B of the regulator-regulator 9 takes values between p'- ⁇ and p '+ ⁇ , p' being the pressure at which the metering pump 10 discharges the vapors to the storage tank 1 where the pressure p 'prevails, down to the downstream pressure drop.
  • An adjustment spring 12 allows possible adjustment between the upstream and downstream pressures of the pump 10.
  • the chamber A of the regulator-regulator 9 is always under pressure P> p o and the expansion from P to p ' ⁇ ⁇ can always between chambers A and B at the level of the control valve.
  • the metering pump 10 working under pressures very close upstream and downstream, acquires very good quality metrological, internal leaks being canceled.
  • FIG. 2 differs from that which has just been described with reference to FIG. 1 in that the metrological metering pump 10 operating at ⁇ p ⁇ 0 is mounted in series upstream of the pump 7 of power. It will be noted that in this case, the pump 10 and the regulator-regulator 9 both work under a pressure p 1 less than p o , created by the suction of the power pump 7, hence the presence upstream of the pump 10 and regulator 9 of a pressure regulator 15 at the value p 1 .
  • the power pump 7 located downstream will provide always enough pressure to discharge the vapors when the downstream pipe 13 is hydraulically resistant.
  • the vapor recovery system in Figure 2 can easily extend in the case of a plurality of distribution.
  • the power pump 7 is unique and placed on a common portion 6 to the pipes 6a, 6b for recovery, downstream of the differential pressure regulators 9a, 9b.
  • FIG. 4 shows an alternative embodiment of the recovery system of the invention in which the power pump 7 and the metering pump 10 are driven by a common motor 17 at a speed of rotation sensiblement substantially proportional to the volume flow rate.
  • the cyclic volume power pump 7 V delivers in the regulator-regulator 9 at the level of room A.
  • the rooms B and C are connected respectively upstream and downstream of the pump 10 which thus works at very low differential pressure and whose cyclic volume is v less than V.
  • the metering pump 10 does not evacuate, under these conditions, as much vapor as the pump 7 is capable of supplying, an overpressure P> p o is established in the chamber A of the regulator-regulator 9 and its valve can relax the vapors from P to p "towards the inlet of the metrological pump 10, which operates under the pressure p" with a differential inlet / outlet pressure of Vosine of zero.
  • Another advantageous feature of the vapor recovery, object of the invention is the possibility to carry out a test with air ("dry test" in English) without make a systematic error due to differences in viscosity and molecular mass between the air and the air + mixture hydrocarbon vapors.
  • viscosity and density no longer play no role in establishing the flow since it is determined by the metrological pump alone which doses volumes at constant pressure. They also do not play at the level of internal leaks, these being canceled.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (6)

  1. Rückführungssystem für von Fahrzeugtanks freigesetzten Kohlenwasserstoffdämpfe bei der Lieferung von flüssigem Kraftstoff durch mindestens eine Verteilerleitung (19), wobei das System eine mit der Verteilerleitung (19) verbundenen Rückführungsleitung (6), welche auf der Rückführungsleitung (6) angebracht ist, sowie eine Dosierpumpe (10) besitzt, die durch einen Motor (11) mit einer Drehzahl (ω), die etwa zu dem in der Verteilerleitung (19) gelieferten Volumenstrom (Qv) proportional ist, angetrieben ist, dadurch gekennzeichnet, daß die Dosierpumpe (10) mit einer Leistungspumpe (7) über ein Differentialdruckminderventil (9) seriell angeschlossen ist, welches dafür geeignet ist, einen niederwertigen Differentialdruck (Δp) zwischen dem Dosierpumpenauslaß und - einlaß (10) aufrechtzuerhalten, um einen Dampfvolumenstrom (qvo) zu erhalten, der etwa proportional zur durch den Motor (11) bedingten Drehzahl (ω) ist.
  2. Rückführungssystem nach Anspruch 1 dadurch gekennzeichnet, daß die Leistungspumpe (1) und die Dosierpumpe (10) durch einen gemeinsamen Motor (17) mit einer zum gelieferten Volumenstrom (Qv) vom flüssigen Kraftstoff etwa proportionalen Drehzahl (ω) angetrieben sind, wobei die Leistungspumpe (7) einen Zyklusstrom (V) besitzt, der den Zyklusstrom (v) der Dosierpumpe (10) übersteigt.
  3. Rückführungssystem nach Anspruch 1 bzw. 2 dadurch gekennzeichnet, daß die Dosierpumpe (10) mit der Leistungspumpe (7) seriell nachgeschaltet ist.
  4. Rückführungssystem nach Anspruch 3 dadurch gekennzeichnet, daß ein Druckregler (18) der Dosierpumpe (10) und dem Differentialdruckminderventil (9) nachgeschaltet ist.
  5. Rückführungssystem nach Anspruch 1 bzw. 2 dadurch gekennzeichnet, daß die Dosierpumpe (10) der Leistungspumpe (7) seriell vorgeschaltet ist, wobei ein Druckminderer (15) vor der Dosierpumpe (10) und dem Differentialdruckminderventil (9) angebracht ist.
  6. Rückführungssystem nach Anspruch 5 dadurch gekennzeichnet, daß, da die Verteilerleitungen (19a, 19b) vielfach sind, die Leistungspumpe (7) allein und an einer den jeweiligen Rückführungsleitungen (6a, 6b) gemeinsamen Strecke (6) nach den Differentialdruckminderventilen (9a, 9b) angebracht ist.
EP96924923A 1995-07-06 1996-07-02 Vorrichtung zur entsorgung von kraftstoffdämpfen mit verbesserter laufstabilität Expired - Lifetime EP0779876B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9508194 1995-07-06
FR9508194A FR2736340B1 (fr) 1995-07-06 1995-07-06 Circuit et systeme de recuperation de vapeurs d'hydrocarbures pour stations service usage d'un pompage a deux etages
PCT/FR1996/001031 WO1997002208A1 (fr) 1995-07-06 1996-07-02 Systeme de recuperation de vapeurs d'hydrocarbures a stabilite amelioree

Publications (2)

Publication Number Publication Date
EP0779876A1 EP0779876A1 (de) 1997-06-25
EP0779876B1 true EP0779876B1 (de) 1998-12-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96924923A Expired - Lifetime EP0779876B1 (de) 1995-07-06 1996-07-02 Vorrichtung zur entsorgung von kraftstoffdämpfen mit verbesserter laufstabilität

Country Status (6)

Country Link
US (1) US5878790A (de)
EP (1) EP0779876B1 (de)
AT (1) ATE174309T1 (de)
DE (1) DE69601122D1 (de)
FR (1) FR2736340B1 (de)
WO (1) WO1997002208A1 (de)

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Publication number Priority date Publication date Assignee Title
SE523480C2 (sv) * 1999-11-26 2004-04-20 Dresser Wayne Ab Ångåterföringsanordning för en bränsletankningsanläggning
US6622757B2 (en) 1999-11-30 2003-09-23 Veeder-Root Company Fueling system vapor recovery and containment performance monitor and method of operation thereof
US6901786B2 (en) * 1999-11-30 2005-06-07 Veeder-Root Company Fueling system vapor recovery and containment leak detection system and method
US6357493B1 (en) 2000-10-23 2002-03-19 Marconi Commerce Systems Inc. Vapor recovery system for a fuel dispenser
US6347649B1 (en) 2000-11-16 2002-02-19 Marconi Commerce Systems Inc. Pressure sensor for a vapor recovery system
US6805173B2 (en) * 2002-01-11 2004-10-19 Healy Systems, Inc. Vapor space pressure control system for underground gasoline storage tank
US6644360B1 (en) * 2002-05-06 2003-11-11 Gilbarco Inc. Membrane and sensor for underground tank venting system
US7909069B2 (en) 2006-05-04 2011-03-22 Veeder-Root Company System and method for automatically adjusting an ORVR compatible stage II vapor recovery system to maintain a desired air-to-liquid (A/L) ratio
US20090007983A1 (en) * 2007-05-04 2009-01-08 Healy James W Vapor Containment and Electrical Power Generation
US8381775B2 (en) * 2007-05-04 2013-02-26 James W. Healy Vapor containment
WO2008144273A1 (en) * 2007-05-17 2008-11-27 Cms Technologies Holdings, Inc. Volatile emission control for inaccessible storage tanks
US8191585B2 (en) * 2008-05-28 2012-06-05 Franklin Fueling Systems, Inc. Method and apparatus for monitoring for a restriction in a stage II fuel vapor recovery system
ATE539999T1 (de) 2008-05-28 2012-01-15 Franklin Fueling Systems Inc Verfahren und vorrichtung zur überwachung von einschränkungen in einem stufe-ii-brennstoff- dampfgewinnungssystem
US8677805B2 (en) 2009-05-18 2014-03-25 Franklin Fueling Systems, Inc. Method and apparatus for detecting a leak in a fuel delivery system
US8770237B2 (en) * 2009-10-19 2014-07-08 Veeder-Root Company Vapor recovery pump regulation of pressure to maintain air to liquid ratio

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US2936107A (en) * 1956-06-14 1960-05-10 Nat Res Corp High vacuum device
US4256151A (en) * 1979-03-26 1981-03-17 Texaco Inc. System for dispensing a volatile fuel
US4260000A (en) * 1979-06-04 1981-04-07 Texaco Inc. Fuel dispensing system with controlled vapor withdrawal
US5363649A (en) * 1989-12-18 1994-11-15 Dana Corporation Hydraulic dry valve control apparatus
EP0443068A1 (de) * 1990-02-22 1991-08-28 Scheidt & Bachmann Gmbh Verfahren und Vorrichtung zur Entsorgung der beim Betanken eines Fahrzeugs mit Kraftstoff freiwerdenden und/oder vorhandenen Gase
US5156199A (en) * 1990-12-11 1992-10-20 Gilbarco, Inc. Control system for temperature compensated vapor recovery in gasoline dispenser
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US5542458A (en) * 1994-08-22 1996-08-06 Gilbarco Inc. Vapor recovery system for a fuel delivery system

Also Published As

Publication number Publication date
ATE174309T1 (de) 1998-12-15
US5878790A (en) 1999-03-09
FR2736340A1 (fr) 1997-01-10
FR2736340B1 (fr) 1997-08-22
WO1997002208A1 (fr) 1997-01-23
DE69601122D1 (de) 1999-01-21
EP0779876A1 (de) 1997-06-25

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