EP2041476B1 - Procédé et système pour conférer une odeur à un gaz - Google Patents

Procédé et système pour conférer une odeur à un gaz Download PDF

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Publication number
EP2041476B1
EP2041476B1 EP07789476A EP07789476A EP2041476B1 EP 2041476 B1 EP2041476 B1 EP 2041476B1 EP 07789476 A EP07789476 A EP 07789476A EP 07789476 A EP07789476 A EP 07789476A EP 2041476 B1 EP2041476 B1 EP 2041476B1
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EP
European Patent Office
Prior art keywords
main pipe
odorising
gas
tank
odorant
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EP07789476A
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German (de)
English (en)
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EP2041476A2 (fr
Inventor
Angelo Mapelli
Francesco Jamoletti
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0341—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/034—Control means using wireless transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/02—Mixing fluids
    • F17C2265/025—Mixing fluids different fluids
    • F17C2265/027—Mixing fluids different fluids with odorizing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/068—Distribution pipeline networks

Definitions

  • the present invention relates to a method and a system for odorising a gas and, more precisely, it concerns a method and a system for odorising a gas in the distribution network of a natural gas production plant or the like.
  • Plants for distributing natural gas to users typically include provision for odorising the gas (which is normally odourless) to facilitate the identification of any gas leaks into environments occupied by people.
  • a pipe for drawing the gas from a distribution network in a decompression and metering station, there is a pipe for drawing the gas from a distribution network, a decompression and regulation system, a meter and a pipe for delivering the gas to one or more users, arranged one after the other in succession.
  • the gas pipe downstream from the meter is fitted with a lapping system or device for odorising the gas, see for example JP 2005 5133785 .
  • a liquid odorant dosing device is installed on the delivery pipe and connected, by means of a circuit, to a pressurisable balance tank containing a liquid odorant.
  • the tank can be pressurised by means of a circuit that carries a flow of gas in the pressurisable tank from and to the intake pipe upstream from the regulating device.
  • the object of this circuit for delivering gas from/to the pressurisable balance tank containing the liquid odorant is to generate a thrust pressure inside said tank to enable the dosage of the liquid through a solenoid valve, depending on the variations in the flow rate demanded by the user downstream from the meter.
  • the pressure in the pressurisable balance tank thus adjusts the flow rate of the liquid odorant as a function of any changes in the pressure/flow rate in the intake pipe on the user side.
  • pressure reducing means are provided to govern said operation of the pressurisable balance tank.
  • the system is always accompanied by a conventional lapping-type odorising device that can be used as an alternative to the injection system during any stoppages of the latter.
  • a first drawback lies in that the pressure adjustment for the liquid odorant in the pressurisable balance tank to deliver to the injector may be inaccurate, and any discrepancy gives rise to a correspondingly imprecise injection of liquid into the gas flow being distributed.
  • Another drawback lies in that a rather complex pneumatic management system is needed to fill the pressurisable balance tank, venting the overpressure upstream from the meter and filling the lapping tank by gravity. This operation cannot always be guaranteed because of the pressure drop due to the metering manifold. This drawback can make the device cut out.
  • odorising system designed in this way can only function within certain previously-established ranges of pressure/flow-rate values, and only at natural gas distribution stations that provide for a decompression of the gas.
  • Another drawback lies in the type of dosing unit used, which delivers the liquid by drop into a dispersion system to enable its proper vaporisation in the gas in transit.
  • the object of the present invention is to overcome the above-mentioned drawbacks, by means of a gas odorising system in a network for distributing gas to a user, that involves the use of an electric injector of liquid odorant into the gas delivery pipe, wherein the injector is connected to an electric pump for delivering the liquid odorant coming from a tank containing said liquid, said system enabling a constant injection pressure and the dosage of each single injection according to need for each single cubic metre in transit, injecting a suitably vaporised liquid.
  • Another object of the present invention is to provide a gas odorising system in a network for distributing gas to a user that offers a considerable versatility, thanks to the opportunity to reprogram the injection system so that it can inject any type of commercially available odorant, always assuring the ideal concentration.
  • An additional object of the present invention is to provide a gas odorising system in a network for distributing gas to a user that is simple to construct, fully controllable and easily manageable, easy to service and calibrate, highly reliable and safe in use, and that is suitable for interfacing with a remote unit for computer-assisted management, e.g. using a PLC, PC or the like.
  • the present invention thus concerns a gas odorising system in a network for distributing gas to a user according to the attached claims.
  • the present invention includes a method for managing and monitoring the gas odorising system in a network for distributing gas to a user according to the attached claims.
  • FIG. 1 shows the gas odorising system of the present invention.
  • a main pipe 1 for delivering the gas coming from a distribution station to a user.
  • This main pipe has a pressure differential valve 2 normally provided in this type of system for delivering gas to a user.
  • Upstream and downstream from the differential valve 2 there are respective on/off valves 3 for the purpose of drawing off a given flow rate of gas upstream from the differential valve and subsequently returning it to the main pipe 1 downstream from the differential valve.
  • each on/off valve 3 is connected to a respective pipe 30 that is connected in turn to a tank 6, containing a liquid odorant of the known type, such as mercaptan or the like (better illustrated later on).
  • a liquid odorant of the known type such as mercaptan or the like (better illustrated later on).
  • each pipe 30 has respective on/off valves 5, one of the two of which is always micrometrically precise and used to adjust the flow rate, and both of which are installed so as to be able to isolate the tank from the main pipe 1.
  • level sensor 7 of the known type installed in the tank 6 to provide an indication of the level of the liquid odorant inside.
  • the level sensor 7 is connected to two pipes 70, each of which is complete with a respective on/off valve 8 and solenoid valve 9 and 10, respectively.
  • the pipe 70 coming under the influence of the solenoid valve 10 is connected to a device 11 for filtering the liquid phase of the liquid odorant.
  • This filtering device 11 also has a settling tank 13, the purpose of which is well known.
  • an electric circulator device 12 connected to the filter 11 so as to draw off a predetermined flow rate of liquid odorant coming from the filter 11 and carry it through a pipe 120 that is connected to an injector 14 pneumatically connected to the main pipe 1 (better illustrated later on).
  • an injector 14 pneumatically connected to the main pipe 1 (better illustrated later on).
  • an on/off valve 15 downstream from the injection device 14 and upstream from the main pipe 1 for the purpose of isolating the injection system if necessary.
  • FIGS 2 and 3 show the injection device 14 of the present invention.
  • the injection device 14 consists of an injector 16 contained inside a casing 17.
  • the casing 17 substantially consists of two parts.
  • a first part 18 consists of a cylindrical body with a threaded coupling surface 19 and a matching surface 20, while the second part consists of a substantially hollow complementary cylindrical body 21 with a complementary threaded coupling surface 19 and a complementary matching surface 20, each of which is designed to co-operate with the corresponding surfaces on the first part.
  • the matching surface 20 on the second part 21 contains an O-ring type gasket 22.
  • the injector 16 is locked in a suitable seat formed by the two parts 18 and 21, and prevented from performing any horizontal or vertical movement once the casing 17 has been closed.
  • the injector 16 is first connected electrically by fixing the power supply wire to the connector on the injector (e.g. by means of a Faston connection). Then, once the injector 16 is locked inside its seat, all the remaining space inside the casing 17 is filled with a silicone resin 23 whose thermal and mechanical characteristics depend on the intended type of usage (e.g. a silicone resin such as HIGH TEMPERATURE BOSTIK 2464, suitable for working temperatures continually at 260°C).
  • a silicone resin 23 whose thermal and mechanical characteristics depend on the intended type of usage (e.g. a silicone resin such as HIGH TEMPERATURE BOSTIK 2464, suitable for working temperatures continually at 260°C).
  • a locking pin 24 is inserted on the outside edge of the casing 17.
  • a suitable clamp 25 is also provided for earthing the casing.
  • the above-described injection device 14 forms an integral part of the odorising system of the present invention, designed to deliver a liquid (mercaptan or the like) under controlled conditions into the pipe 1 carrying natural gas, methane gas or coal gas under pressure.
  • the injected liquid is kept at a pressure that can vary, according to need, from 0.5 to 1 bar higher than the pressure in the main pipe 1 thanks to the motor-driven pump 12 installed upstream from the injection device 14.
  • the presence of a liquid under pressure in the device 14 is guaranteed by a level sensor that cuts off the system in the event of a shortage of liquid odorant in the tank 6, switching off the power supply to the injection device 14 and pump 12, as well as cutting off the flow of liquid odorant by means of the normally-closed solenoid valves provided.
  • the casing 17 is installed directly on the on/off valve 15 and this is connected to them main pipe 1. In this way, the dismantling of the injector can be done only after cutting off the gas by closing the on/off valve 15. According to another aspect of the present invention, in the event of a malfunction of the injection device 14, it can be replaced after cutting off the gas flow by closing the on/off valve 15.
  • the injection device 14 is tested, calibrated, assembled with the corresponding protective casing 17 and sealed at the factory before it is dispatched, and consequently needs no further adjustment in the field.
  • Another aspect of the odorising system of the present invention lies in that it can advantageously managed by an electronic management system. More precisely, because the injection device 14 is managed by an electric injector 16 powered by an electric circulator 12, the delivery of the liquid odorant from the tank 6 to the main pipe 1 can be managed from a remote unit, such as a PLC unit, a PC or the like.
  • a remote unit such as a PLC unit, a PC or the like.
  • the remote management and monitoring unit can also transmit these date to a display installed on a control panel (not shown in the figures) and the operator monitoring and managing the system can interact with the system by means of said panel.
  • a control panel not shown in the figures
  • the operator monitoring and managing the system can interact with the system by means of said panel.
  • the data recorded by the control unit can be a continuously-refreshed data set, enabling an instantaneous and ongoing assessment of the dosages relating to the flow rate of the gas in transit.
  • the electronic control of the system can include a precise monitoring of the quantity of odorant to inject through the injection device 14, as explained below.
  • the dosage of the odorant relies on a calculation of the quantity to inject or deliver based on pulses emitted by a meter that monitors the volumes for fiscal purposes.
  • the pulses are proportional to the volume of gas flowing in the main pipe.
  • Each pulse is multiplied by a correction factor mainly to take into account the absolute pressure and the temperature of the gas in transit.
  • the volume meter does not emit single pulses; instead, it groups them together (usually 3-4 at a time) so that, after correction, they relate to an equivalent of the passage of approximately 15-20 cubic metres of gas. If, after acquiring this value, the dosing apparatus were to immediately inject the quantity of odorant corresponding to the pulses received, there would be major oscillations in the amount of odorant delivered into the piping, because the quantity needed for 15-20 cubic metres of gas would all be injected into 1 cubic metre of gas, then no more liquid would be added until the next set of pulses is received.
  • the value of one pulse relates to an equivalent of 10 cubic metres of gas, further increasing the above-described problem.
  • the system thus injects the odorant needed in an ongoing, more frequent process, guaranteeing an even concentration of the odorant in the gas in transit, avoiding the risk of its overdosage (especially during periods of low gas consumption) alternating with periods of a shortage of odorant.
  • the system can also electronically and automatically control the opening time of the injection device 14 on the basis of the flow rate of the gas in transit, obtaining said single optimal quantity of odorant for each injection.
  • the system is complete with a control logic that uses the gas consumption recorded on the previous days in order to establish the opening time for the injection device 14 on each day.
  • This control logic disregards official holidays and the days prior to them, since they are days on which consumption can vary considerably: for instance, the settings for Mondays are based on the consumption on the previous Friday.
  • control logic After checking the daily volume, the control logic applies the best opening times to the injection device so as to dose and deliver the odorant evenly and effectively in every cubic metre of gas in transit.
  • the odorising system according to the present invention offers numerous advantages.
  • the first advantage lies in that only a very straightforward reprogramming action is needed to enable the injection of any type of odorant commercially available, thus assuring its optimal concentration in the gas.
  • Another advantage lies in that the system's design is extremely rational.
  • the use of the electric injection device 14, powered by an electric circulator 12, can always guarantee the injection of the required quantity of liquid whatever the gas delivery conditions in the main pipe 1. For instance, a relationship can be established between the number of injections and the cubic metres of gas in transit.
  • the quantity of liquid injected can be guaranteed to within a margin of error of ⁇ 2.5%.
  • the electronic level measuring device 13 can verify the quantity of odorant injected instant by instant, serving a dual purpose in that it also checks the level of the odorant contained in the main tank 6.
  • the electronic management of these measuring devices is entrusted to the control unit, which can send alarm messages and remotely control the entire process: every time the tank monitored by the level sensor 7 becomes empty, a check is performed on the dosage and the self calibration of the system is activated.
  • the injection device 14 is the only part of the system liable to wear, but its structural design derives from fatigue tests well in excess of the real requirements - in terms of the working environment, the working temperatures and the number of cycles - for its use in the system of the present invention. For instance, at a station constantly delivering 5000 standard cubic meters per hour, 24 hours a day, the injection device 14 has a working life of 15 years.
  • Another advantage lies in that all the functional devices in the system are designed to be installed and then tested remotely using a remote supervisor system. All the information obtained during the operation of the system can be saved for as long as necessary. The system's reliability is guaranteed by tried and tested, prime quality electronic management apparatus, electromechanical safety systems and a remote management of the system. For instance, a maximum limit of injections can be established beyond which the system will cut out to avoid erroneous concentrations in the event of a malfunction of the meter from which the PLC receives the adjusted volume data.
  • Another advantageous feature of the system of the present invention lies in that, thanks to the remote and interfaced management via a control unit, such as a PLC or the like, the system can be used for a daily data logging of the number of injections performed and the quantity of odorant delivered, and for particular needs it is very easy to obtain any type of printout of these data according to any schedule required.
  • a remote terminal can be used to check on screen the number of injections made per hour and the quantity of odorant injected per hour, as well as the daily averages.
  • a screen with a web page format enables the entire system to be monitored as if the user were at the station.
  • Another advantageous feature of the system lies in that it affords a considerable operating safety by comparison with the conventional systems. In fact, any malfunctions are detected while the system is in operation using extremely straightforward, but highly reliable devices. In the event of any possible anomaly, the system is disabled and the lapping-type odorising means are switched on automatically. All these operations can be handled either automatically by the PLC or manually by the operator. The presence of liquid in the main tank is monitored by a specific sensor and, if the level drops to below the minimum setting, the system is disabled. Based on the customer's needs, a series of printouts can be scheduled at different deadlines. All alarms are indicated on screen and relayed to a remote station.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Treating Waste Gases (AREA)

Claims (23)

  1. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) et transporté d'une station de distribution à un utilisateur, comportant des moyens (2) pour réguler la pression de distribution dans ladite conduite principale (1), un réservoir mis sous pression (6) contenant une substance odorante liquide et des moyens de marche-arrêt/régulation (3, 30, 4, 5) pour ledit réservoir (6),
    un dispositif (14) pour injecter ladite substance odorante liquide provenant dudit réservoir (6) dans ladite conduite principale (1), et des moyens (12) pour transférer ladite substance odorante liquide depuis ledit réservoir (6) jusqu'audit dispositif d'injection (14), agencés de telle sorte que la distribution de la substance odorante liquide audit dispositif d'injection (14) est indépendante de la valeur de pression du gaz dans ladite conduite principale (1) ou de la valeur de pression à l'intérieur dudit réservoir mis sous pression (6),
    caractérisé en ce que lesdits moyens (12) pour alimenter ledit dispositif d'injection (14) comportent un circulateur électrique (12) relié par un circuit audit réservoir de substance odorante liquide (6).
  2. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, dans lequel lesdits moyens pour mettre sous pression ledit réservoir de substance odorante liquide (6) comportent :
    - au moins un circuit (30) pour acheminer le gaz depuis/vers la conduite principale (1) et depuis/vers ledit réservoir (6), et
    - des vannes de marche/arrêt (3, 4, 5) sur ledit circuit pour transférer le gaz depuis/vers la conduite principale et depuis/vers ledit réservoir (6).
  3. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, dans lequel au moins une vanne (4) parmi lesdites vannes de marche/arrêt (3, 4, 5) est une électrovanne ou est commandée par une électrovanne.
  4. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication 2 ou 3, dans lequel ledit circuit de transfert de gaz (30) est positionné en amont desdits moyens (2) pour réguler la pression dans ladite conduite principale (1).
  5. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications précédentes, dans lequel ledit circulateur électrique (12) est actionné électriquement par une unité de commande à distance.
  6. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications précédentes, dans lequel ledit réservoir (6) contient un capteur mécanique et/ou électronique (7) pour indiquer le niveau de la substance odorante liquide.
  7. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, comportant également un dispositif de filtrage (11) relié audit capteur de niveau (7) au moyen de deux tuyaux (70), chacun d'entre eux étant muni de vannes de marche/arrêt respectives (8, 9, 10).
  8. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, dans lequel au moins une vanne (9, 10) parmi lesdites vannes de marche/arrêt est une électrovanne.
  9. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication 7 ou 8, dans lequel ledit dispositif de filtrage (11) comporte un réservoir de décantation (13).
  10. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications précédentes, dans lequel lesdits moyens pour alimenter ledit dispositif d'injection (14) comportent un circulateur électrique (12) pneumatiquement relié audit filtre (11) et audit dispositif d'injection (14).
  11. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications précédentes, dans lequel ledit dispositif d'injection (14) est directement relié à ladite conduite principale (1) en aval desdits moyens de régulation de pression (2) et est complété par une vanne de marche/arrêt (15).
  12. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications précédentes, dans lequel ledit dispositif d'injection (14) comporte un injecteur électrique (16) contenu à l'intérieur d'un boîtier (17).
  13. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, dans lequel ledit boîtier (17) comporte :
    - une première partie (18) constituée d'un corps cylindrique avec une surface de couplage taraudée (19) et une surface correspondante (20),
    - une seconde partie (21) constituée d'un corps cylindrique complémentaire, sensiblement creux, qui a également une surface de couplage taraudée complémentaire (19) et une surface complémentaire correspondante (20), chacune d'entre elles étant adaptée pour coopérer avec les surfaces respectives sur ladite première partie (18).
  14. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, dans lequel ledit boîtier (17) comporte également un joint torique (22) agencé à l'intérieur de ladite surface correspondante (20) sur ladite seconde partie (21).
  15. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication 12 ou 13 ou 14, dans lequel ledit boîtier (17) a des évidements pour contenir et retenir ledit injecteur (16), ledit injecteur (16) étant bloqué en position par la fermeture de ladite première partie (18) sur ladite seconde partie (21).
  16. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications 12 à 15, dans lequel ledit boîtier (17) comporte en outre un volume intérieur (23) entre ledit injecteur (16) et lesdites parties (18, 21) qui est rempli d'une résine de silicone ayant des caractéristiques thermiques et mécaniques prédéterminées en fonction du type de fonctionnement requis.
  17. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication précédente, dans lequel ledit boîtier (17) comporte également une goupille de blocage (24) placée sur le bord extérieur du boîtier (17).
  18. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon l'une quelconque des revendications 12 à 17 précédentes, dans lequel ledit boîtier (17) comporte également une pince (25) pour mettre le boîtier à la terre.
  19. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication 1, comportant un système pour gérer électroniquement la quantité de ladite substance odorante à injecter à travers ledit injecteur (14), comportant des moyens pour :
    - acquérir les impulsions émises par le compteur, reçues en entrée,
    - évaluer la quantité de substance odorante requise,
    - comparer ladite quantité à la quantité individuelle de chaque injection que le système considère comme optimale afin d'obtenir le nombre d'injections nécessaires,
    - attendre l'entrée d'impulsion suivante,
    - mesurer le temps écoulé depuis l'entrée d'impulsion précédente,
    - diluer la substance odorante à injecter entre ledit nombre d'injections et distribuer la substance odorante sur l'intervalle de temps s'écoulant entre une entrée d'impulsion et la suivante.
  20. Système pour conférer une odeur à un gaz acheminé dans une conduite principale (1) selon la revendication 19, dans lequel ledit système de gestion électronique comporte des moyens pour commander le temps d'ouverture dudit dispositif d'injection (14) d'après le débit du gaz en transit, en obtenant ainsi ladite quantité optimale individuelle de chaque injection.
  21. Procédé pour conférer une odeur à un gaz acheminé dans une conduite principale provenant d'une station de distribution et menant à un utilisateur, comportant les étapes suivantes consistant à :
    - enregistrer la pression dans ladite conduite principale (1) en fonction des débits de gaz jusqu'audit utilisateur à l'aide de moyens de régulation de pression (2) sur ladite conduite principale (1),
    - mettre sous pression un réservoir pouvant être mis sous pression (6) contenant une substance odorante liquide au moyen d'une communication pneumatique entre ladite conduite principale (1) et ledit réservoir (6), et des moyens (3, 30, 4, 5) pour mettre sous pression ledit réservoir (6), et
    - délivrer la substance odorante liquide à un dispositif d'injection (14) agencé sur ladite conduite principale (1) en aval desdits moyens de régulation de pression (2) d'une manière qui n'est pas affectée par la pression du gaz à l'intérieur de ladite conduite principale (1) ou par la pression à l'intérieur dudit réservoir pouvant être mis sous pression (6), caractérisé en ce que la distribution de la substance odorante liquide audit dispositif d'injection (14) est effectuée au moyen d'un circulateur électrique (12) relié audit réservoir (6) par un circuit.
  22. Procédé pour conférer une odeur à un gaz selon la revendication 21, comportant les étapes suivantes consistant à :
    - acquérir les impulsions émises par le compteur, reçues en entrée,
    - évaluer la quantité de substance odorante requise,
    - comparer ladite quantité à la quantité individuelle de chaque injection que le système considère comme optimale afin d'obtenir le nombre d'injections nécessaires,
    - attendre l'entrée d'impulsion suivante,
    - mesurer le temps écoulé depuis l'entrée d'impulsion précédente,
    - diluer la substance odorante à injecter entre ledit nombre d'injections et distribuer la substance odorante sur l'intervalle de temps s'écoulant entre une entrée d'impulsion et la suivante.
  23. Procédé pour conférer une odeur à un gaz selon la revendication 22, comportant une étape pour commander le temps d'ouverture dudit dispositif d'injection (14) sur la base du débit du gaz en transit, en obtenant ladite quantité optimale individuelle de chaque injection.
EP07789476A 2006-07-04 2007-07-04 Procédé et système pour conférer une odeur à un gaz Active EP2041476B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000270A ITPD20060270A1 (it) 2006-07-04 2006-07-04 Metodo e sistema per odorizzare un gas
PCT/IB2007/001840 WO2008004089A2 (fr) 2006-07-04 2007-07-04 Procédé et système pour conférer une odeur à un gaz

Publications (2)

Publication Number Publication Date
EP2041476A2 EP2041476A2 (fr) 2009-04-01
EP2041476B1 true EP2041476B1 (fr) 2011-01-05

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EP07789476A Active EP2041476B1 (fr) 2006-07-04 2007-07-04 Procédé et système pour conférer une odeur à un gaz

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EP (1) EP2041476B1 (fr)
AT (1) ATE494509T1 (fr)
DE (1) DE602007011762D1 (fr)
ES (1) ES2359273T3 (fr)
IT (1) ITPD20060270A1 (fr)
WO (1) WO2008004089A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2638919B1 (fr) * 2012-03-12 2016-07-20 Air Liquide Deutschland GmbH Dispositif et procédé d'introduction d'un arome dans un flux de gaz porteur
FR3006610B1 (fr) * 2013-06-10 2015-07-03 Gdf Suez Systeme et procede d'injection d'odorisant liquide dans une canalisation de gaz naturel
CN117432946B (zh) * 2023-12-19 2024-03-08 上海叁零肆零科技有限公司 结合仿真的梯度分布式城镇燃气智能加臭方法及系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123252A (en) * 1964-03-03 kuntz
US3456451A (en) * 1967-11-15 1969-07-22 Helmrich & Payne Inc Odorizer transfer system
FI93270C (fi) * 1988-11-30 1995-03-10 Aga Ab Menetelmä hajusteen lisäämiseksi happikaasuun
BR9207142A (pt) * 1992-06-16 1995-12-12 Aga Ab Método e aparelho para adicionar um melodorizador a um gás de consumidor
JP4300381B2 (ja) * 2000-03-29 2009-07-22 大阪瓦斯株式会社 付臭された燃料ガスの吸着貯蔵装置
DE10060722A1 (de) * 2000-12-07 2002-06-27 Messer Griesheim Gmbh Herstellung von Gasgemischen mittels Ink-Jet
JP3878053B2 (ja) * 2002-05-01 2007-02-07 株式会社チヨダセキュリティーサービス 燃料供給装置
JP2005133785A (ja) * 2003-10-29 2005-05-26 Ishikawajima Harima Heavy Ind Co Ltd 供給装置
ES2235646B1 (es) * 2003-12-22 2006-03-16 Ros Roca Indox Equipos E Ingenieria, S.L. Planta movil de regasificacion de gnl.
DE102004050419A1 (de) * 2004-10-15 2006-04-27 Linde Ag Odorierung von Wasserstoff on-board

Also Published As

Publication number Publication date
ATE494509T1 (de) 2011-01-15
DE602007011762D1 (de) 2011-02-17
ITPD20060270A1 (it) 2008-01-05
WO2008004089A3 (fr) 2008-02-28
WO2008004089A2 (fr) 2008-01-10
EP2041476A2 (fr) 2009-04-01
ES2359273T3 (es) 2011-05-20

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