WO2006016793A1 - Sistema electromecánico que extrae el aire y los vapores del gas licuado de petroleo para su conducción y medición - Google Patents
Sistema electromecánico que extrae el aire y los vapores del gas licuado de petroleo para su conducción y medición Download PDFInfo
- Publication number
- WO2006016793A1 WO2006016793A1 PCT/MX2004/000059 MX2004000059W WO2006016793A1 WO 2006016793 A1 WO2006016793 A1 WO 2006016793A1 MX 2004000059 W MX2004000059 W MX 2004000059W WO 2006016793 A1 WO2006016793 A1 WO 2006016793A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lpg
- air
- flow
- liquid state
- valve
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/12—Liquefied petroleum gas
Definitions
- the invention is a system that replaces the current technologies for separating and extracting the air and vapors of Liquefied Petroleum Gas (hereinafter referred to as LPG) to leave it in an exclusively liquid state.
- LPG Liquefied Petroleum Gas
- the need to separate the air and vapors from the LPG is generated by virtue of the fact that there are several devices through which LPG flows are conducted, including all the LPG flow measurement devices, which require that they be directed towards them.
- LPG flow in an exclusively liquid state since otherwise inaccuracies or failures can occur in the conduction and measurement.
- the invention described in this document can be used with any of the current LPG flow measurement devices, as well as in other types of devices, such as conduction lines and pumping instruments.
- LPG Liquefied Petroleum Gas
- a public domain technology consisting of installing a vapor trap (5) before the device by which it is intended to conduct a flow of LPG in an exclusively liquid state, such as for example a flow meter (2) and a differential pressure valve (3) after the device in question;
- the steam trap (5) separates the vapor from the LPG in a liquid state and the differential pressure valve (3) guarantees that there is no flow until the pressure of the LPG flowing through the meter (2) is sufficient to overcome Ia spring force (9) together with the resistance pressure that enters said differential pressure valve (3) through the conduit (10) that comes from the return line (8).
- Ia spring force 9
- the resistance pressure that enters said differential pressure valve (3) through the conduit (10) that comes from the return line (8).
- the steam trap is also known as the steam eliminator, air eliminator, or air trap, and it functions as an inlet chamber where the vapors and the air, due to their low density, are displaced to the upper part of the a separation chamber, and the LPG in a liquid state, due to its high density, travels by gravity to the lower part of the separation chamber, from which the power line goes to the measuring device, thus ensuring that the apparatus of measurement be fed with LPG in an exclusively liquid state.
- a valve (7) is placed that conducts the vapors and the air to a return line (8) where the vapors circulate for any reason they enter the separation chamber, but this valve (7) only opens when the float (6) moves down, that is, when there are vapors or air in the separation chamber of the vapor trap, since that when said LPG chamber is filled in an exclusively liquid state, the float rises, thereby blocking the exit to the return line (8), avoiding the pressure and LPG leak in the liquid state towards the return line.
- the mentioned system may have accessories that improve and make performance more reliable, but that do not alter its general principle of operation, such as filters, non-return valves, hydrostatic relief valves, excess flow valves, volume or temperature compensators, mechanical records, electrical records, electronic records, pulse transmitters, lap transmitters, assorted flow transmitters, density, etc.
- This invention consists of an electromechanical system to separate the air and the vapors of LPG to leave it in an exclusively liquid state for its conduction and measurement, which replaces the placement of a vapor trap (5) to The input of the measuring or conduction device, and the placement of a differential pressure valve (3) at the output of the measuring device (2) or conduction in question, by an electronic control system (12) that coordinates the opening and closing of flows through the conduction or measurement device in question, based on the information that is sent to it by a pressure sensor (11), and prior to opening for a moment of an exhaust valve (14 ) towards the return line (15), which purges the air and the vapors of the LPG that are in the entrance chamber to the measuring or conduction device in question.
- This novel system includes a pressure sensor (11), a valve (14) that opens and closes the return line (15) of air and vapors, a control system (12), and a flow control valve (4 ).
- Figure 1 shows an overview of the traditional LPG air and vapor separation system when it is without liquid, so that the float (6) moves down closing the passage to the meter, and the return valve (7) It is opened by the same float (6) allowing the passage of the vapors and the air to the return line (8) and to the differential pressure valve (3) through the gas inlet duct (10) to that valve.
- Figure 2 shows the traditional system with liquid flowing, so that the float (6) moves up, the return valve (7) is closed by the same float (6) preventing the passage of LPG in the liquid state towards the return line (8).
- the differential pressure valve (3) appears open, since the pressure flowing through the meter (2) is sufficient to overcome the force of the spring (9) together with the resistance pressure entering said differential pressure valve (3) through the conduit (10) that comes from the return line (8).
- Figure 3 shows a general view of the LPG air and vapor extraction system referred to in the present invention, where it is incorporated in an exemplary manner, to a LPG flow measuring device.
- the pointer (1) shows the flow entry line to a system to remove the air and vapors from the LPG.
- the pointer (2) shows a device through which it is intended to circulate a flow of Liquefied Petroleum Gas in an exclusively liquid state, and that for example purposes in this case the device turns out to be a LPG flow meter, which It turns out to be, at the same time, the most relevant application for the invention in question.
- the pointer (3) shows the differential pressure valve applied in the traditional LPG air and vapor removal system.
- the pointer (4) shows the outlet valve applied both to the traditional LPG air and vapor removal system, and to the system referred to in this patent document.
- the pointer (5) shows the vapor trap in the traditional LPG air and vapor removal system.
- the pointer (6) shows the float of the vapor trap in the traditional LPG air and vapor elimination system.
- the pointer (7) shows the valve that opens and closes the return line in the traditional LPG air and vapor elimination system.
- the pointer (8) shows the LPG return line applied in the traditional LPG air and vapor removal system with a bifurcation to feed resistance pressure to the differential pressure valve.
- the pointer (9) shows the spring of the differential pressure valve applied to a traditional LPG air and vapor removal system.
- the pointer (10) shows the inlet line of the return line to the differential pressure valve applied to a traditional LPG elimination system.
- the pointer (11) shows the pressure sensor.
- the pointer (12) shows the control system.
- the pointer (13) shows the entrance chamber in the vapor elimination system referred to in the invention.
- the pointer (14) shows the valve that opens the return line in the LPG air and vapor elimination system referred to in the invention.
- the pointer (15) shows the return line in the LPG air and vapor elimination system referred to in the invention.
- This invention is a generally electromechanical system that can be totally mechanical, for the elimination of vapors and air from any device for the conduction and measurement of LPG, which works taking advantage of the fact that the LPG is kept in a liquid state as long as a certain level of pressure is maintained, since when starting any LPG flow through a conduction line or by an apparatus to measure the flow in question, it is verified by means of a pressure sensor (11) generally electronic, that before allowing the flow of LPG through the measuring device (2) or conduction, an adequate pressure exists in the inlet chamber (13) of said device to keep the LPG stable without generating vapors, so once the existence of adequate pressure has been verified, a generally electronic control system (12) will open a valve (14) that leads to a return line (15) of vapors and air, which is used to permanently eliminate any residual air or steam.
- the control system (12) will allow the outlet valve (4) to be opened allowing LPG flow occurs in an exclusively liquid state through the measuring device (2) or conduction in question. If it is desired to interrupt the flow, or if there is a malfunction in the pumps that generate the pressure of the LPG flow, as well as when there is a greater leak in the supply lines (1) of the LPG, will present a loss of pressure in the inlet chamber of the measuring device or of the conduction line from which it is desired to eliminate the vapors and the air, so that such effect will be captured by the pressure sensor (11), and in Consequently, the control system (12) will stop the LPG flow when closing the outlet valve, without the flow being able to be restored until the Ia has been recovered adequate pressure and the valve (14) of the return line has been opened for the time necessary to eliminate any vapor or air residue that could have entered the inlet chamber.
- Another way to interrupt the flow of LPG will be by sending, by the user of the system, an instruction to the control system (12) to close the flow control valve at discretion or on a scheduled basis.
- control system must also be programmed, to ensure that before re-opening the flow control valve (4) and thereby reestablish the flow through the conduction or measurement device in question, the purge process of the inlet chamber (13), thereby throwing any air residue or LPG vapors, towards the return line (15).
- the system covered by the present invention is composed of several components that work independently of each other, coordinated by a generally electronic control system, but which all together achieve the desired technical effect, which is to separate the air and vapors from a flow of LPG.
- the system has a preferably electronic pressure sensor (11), which sends a signal to the control system to inform the value of the pressure existing in the inlet chamber (13) of the device for which a flow is intended to be conducted.
- LPG in an exclusively liquid state, such as a flow meter (2). This is necessary to ensure that the LPG pumping system has been turned on, that the power lines are without major leaks, and therefore, is counted in
- the inlet chamber (13) with the pressure necessary to guarantee the flow of LPG in a liquid state exclusively.
- This sensor is to inform the control system, the pressure in the inlet chamber of the measuring device or the conduction device as the case may be.
- the electronic control system (12) has the function of coordinating the opening and closing of the valves that make up the elimination system of air and vapors from the LPG flow and of interpreting the signals sent by the pressure sensor, thereby purging air and vapors from the inlet chamber (13). This purge is achieved when the control system receives a signal to start the LPG flow, and has an adequate pressure in the supply line (1), since it then opens the vapor return valve (14) for a time.
- the control system (12) sends a signal to open the flow control valve (4 ) allowing the measurement or conduction of the LPG flow through the device to which the system referred to in this invention has been applied.
- control system (12) The most suitable basic component for this control system (12) is a programmable electronic microcontroller, capable of administering all parts of the system, so that variable reading values can be introduced to perform different functions according to the pressure indicated by the pressure sensor (11) thus ensuring the detection of the pressure of the LPG necessary to keep it in an exclusively liquid state in the inlet chamber (13), the microprocessor must also allow the variation of the time in which it must remain open
- the return valve (14) depending on the characteristics of the facilities where it is located, considering the diameter of the pipes, distance at which find the pump, etc.
- Another advantage of this type of controller is that of being able to handle different types of flow control valves (4) such as those that simply open and close, those of double flow or those of proportional or variable flow control.
- this control system (12) could be electric, hydraulic, pneumatic, mechanical or of any known type, or replace the microcontroller, with circuits made of fixed value logic operators.
- This part of the system is responsible for returning to the storage tank the air, vapors and residues of LPG in a liquid state during the purge process that ensures that the LPG is conducted in the liquid only state by conducting the measuring or conduction device. .
- Access to the return line (15) is given only through the return valve (14) which is activated by the control system (12), when the inlet chamber (13) needs to be purged of air and vapors. .
- the return valve (14) can be of any type of existing valve, such as solenoid valves, hydraulic, pneumatic valves, or any type of valve suitable for the pressure at which the LPG conduction is carried out.
- the flow control valve (4) is the one in charge of controlling the LPG flow through the meter (2) or conduction device in question, and is located precisely at the outlet of the measuring device (2) or driving system in question. According to the application in question, the flow control valve (4) can be of various types, such as simply opening or closing, which are used for applications where a more precise control is not required; dual flow for applications where greater flow control is required, as commonly used in vehicle fuel delivery systems; or, of total flow control for applications that require very precise control, by means of the application of proportional valves.
- the device by which it is intended to conduct a flow of LPG in an exclusively liquid state The system for the extraction of air and vapors from the LPG referred to in the invention described can be used to feed any LPG flow meter, guaranteeing that said flow exclusively contains LPG in a liquid state, however, this same system is It can be used with any device that needs to be powered by a flow of LPG in an exclusively liquid state.
- the system covered by this invention works with any type or measurement technology, such as positive displacement meters (within which are piston, gear, oscillating piston, turbine, among others), meters ultrasound mass flow meters (by coriolis effect), differential pressure meters, magnetic flux, vortex meters, etc.
- the LPG air and vapor extractor system referred to in this invention can be used with more than one device that requires conducting LPG flows in an exclusively liquid state, in which case a control valve must be installed.
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Measuring Volume Flow (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/MX2004/000059 WO2006016793A1 (es) | 2004-08-13 | 2004-08-13 | Sistema electromecánico que extrae el aire y los vapores del gas licuado de petroleo para su conducción y medición |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/MX2004/000059 WO2006016793A1 (es) | 2004-08-13 | 2004-08-13 | Sistema electromecánico que extrae el aire y los vapores del gas licuado de petroleo para su conducción y medición |
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WO2006016793A1 true WO2006016793A1 (es) | 2006-02-16 |
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PCT/MX2004/000059 WO2006016793A1 (es) | 2004-08-13 | 2004-08-13 | Sistema electromecánico que extrae el aire y los vapores del gas licuado de petroleo para su conducción y medición |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102156497A (zh) * | 2011-04-21 | 2011-08-17 | 纽贝耳汽车(杭州)有限公司 | 电动汽车动力电池温度控制系统 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3867955A (en) * | 1971-11-17 | 1975-02-25 | Gilbarco Aust Ltd | Air and/or vapour separation device |
EP0532202A2 (en) * | 1991-09-13 | 1993-03-17 | Gilbarco Limited | A fuel dispenser |
ES2099634T3 (es) * | 1994-07-06 | 1997-05-16 | Nuovo Pignone Spa | Valvula by-pass perfeccionada para un grupo suministrador de fluidos, en particular carburantes. |
EP0895960A1 (de) * | 1997-08-04 | 1999-02-10 | ALFONS HAAR Maschinenbau GmbH & Co. | Verfahren und Anlage zur Abgabe von Flüssigkeit aus einem mehrere Kammern enthaltenden Tankwagen |
FR2797865A1 (fr) * | 1999-08-23 | 2001-03-02 | Alma | Appareillage de livraison ou de reception de liquide pour vehicule citerne, et procede de transfert de liquide mis en oeuvre dans cet appareillage |
-
2004
- 2004-08-13 WO PCT/MX2004/000059 patent/WO2006016793A1/es active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3867955A (en) * | 1971-11-17 | 1975-02-25 | Gilbarco Aust Ltd | Air and/or vapour separation device |
EP0532202A2 (en) * | 1991-09-13 | 1993-03-17 | Gilbarco Limited | A fuel dispenser |
ES2099634T3 (es) * | 1994-07-06 | 1997-05-16 | Nuovo Pignone Spa | Valvula by-pass perfeccionada para un grupo suministrador de fluidos, en particular carburantes. |
EP0895960A1 (de) * | 1997-08-04 | 1999-02-10 | ALFONS HAAR Maschinenbau GmbH & Co. | Verfahren und Anlage zur Abgabe von Flüssigkeit aus einem mehrere Kammern enthaltenden Tankwagen |
FR2797865A1 (fr) * | 1999-08-23 | 2001-03-02 | Alma | Appareillage de livraison ou de reception de liquide pour vehicule citerne, et procede de transfert de liquide mis en oeuvre dans cet appareillage |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102156497A (zh) * | 2011-04-21 | 2011-08-17 | 纽贝耳汽车(杭州)有限公司 | 电动汽车动力电池温度控制系统 |
CN102156497B (zh) * | 2011-04-21 | 2013-11-13 | 纽贝耳汽车(杭州)有限公司 | 电动汽车动力电池温度控制系统 |
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