EP3578232B1 - Procédé d'extinction d'un front de flamme et dispositif d'extinction - Google Patents

Procédé d'extinction d'un front de flamme et dispositif d'extinction Download PDF

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Publication number
EP3578232B1
EP3578232B1 EP19173939.0A EP19173939A EP3578232B1 EP 3578232 B1 EP3578232 B1 EP 3578232B1 EP 19173939 A EP19173939 A EP 19173939A EP 3578232 B1 EP3578232 B1 EP 3578232B1
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EP
European Patent Office
Prior art keywords
extinguishing
gas
zone
extinguishing agent
sealing
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.)
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Application number
EP19173939.0A
Other languages
German (de)
English (en)
Other versions
EP3578232A1 (fr
Inventor
Ralf Kosmehl
Tom GUTTE
Frank Helmsen
Michael Davies
Thomas Heidermann
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.)
Leinemann GmbH and Co KG
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Leinemann GmbH and Co KG
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Publication of EP3578232A1 publication Critical patent/EP3578232A1/fr
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Publication of EP3578232B1 publication Critical patent/EP3578232B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
    • A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/04—Removing or cutting-off the supply of inflammable material
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
    • A62C3/065—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products for containers filled with inflammable liquids
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/11—Permanently-installed equipment with containers for delivering the extinguishing substance controlled by a signal from the danger zone
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/04—Control of fire-fighting equipment with electrically-controlled release
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places

Definitions

  • the invention relates to an extinguishing device for a gas line, the extinguishing device having at least one container for holding the extinguishing agent and sealing liquid, and a container with compressed gas or a gas generator for generating an overpressure, the extinguishing device being arranged in such a way that the extinguishing agent can escape from the container under an overpressure generated by the container with compressed gas or the gas generator into an extinguishing area of the gas line and the sealing liquid can be introduced into a blocking area of the gas line.
  • Gas lines are transport devices for gases, especially for combustible gases. These are, for example, pipelines in which gases such as natural gas are transported over long distances. However, it can also be shorter gas lines, such as transport lines between a refinery and a gas storage tank or from a transport vehicle to a gas storage tank.
  • a particular danger is that such a flame front could damage a storage tank or a gas transport vehicle connected to the gas line, e.g a gas tanker, and causes the amount of gas stored in this to explode. Such an accident can lead to enormous damage to property and the environment.
  • gas lines therefore have devices to prevent such an accident.
  • This can be, for example, extinguishing devices or flame arresters.
  • Flame arresters are assemblies that are permanently installed in the gas line and have a large number of flow openings through which the flowing gas can pass but the flame is stopped. As a result, due to their design, they necessarily increase the flow resistance in a gas line. This means that, for example, the gas lines and the gas-promoting pumps have to be dimensioned larger.
  • a flame arrester is disadvantageous, in particular when gases containing impurities are used, since it becomes contaminated by the impurities and the flow rate drops as a result. In such systems, the flame arresters have to be regularly cleaned or replaced, which is laborious.
  • Extinguishing devices are known, for example, in the form of extinguishing nozzles, through which extinguishing agent is sprayed under high pressure into the line when a spark or flame is detected within the gas line.
  • pressure cartridges are available that spray a predetermined amount of extinguishing agent.
  • the U.S. 6,318,475 relates to a ventilation system for rooms in which the propagation of a flame front is prevented by flooding a siphon area of a gas pipe.
  • air or any other gas cannot pass through the siphon in the flooded state, since the application of a pressure difference which is necessary to convey a gas would result in the transport of the quantity of water fed in.
  • the CN 105 498 117 relates to a device for extinguishing a flame front and suppressing explosions in a pipeline.
  • the flooding of the extinguishing area of a line is triggered, which in particular is connected to a collection container.
  • the extinguishing agent for example water, floods part of the line and part of the collection container arranged above it. Unburned gas or oil can collect in the collection container above the level of the extinguishing agent due to the lower density. In this case, too, the further transport of the gas is not possible.
  • the WO 2017/070737 A1 describes a system in which a flow valve is closed when an explosion or fire is detected. In this case, an extinguishing agent is introduced on both sides of the closed valve.
  • the object of the present invention is to propose a method for extinguishing a flame front in a gas line and an extinguishing device for carrying out this method, with which the disadvantages mentioned above can be reduced.
  • U.S. 2015/238787 A1 shows an extinguishing device for extinguishing a flame front, but without a siphon.
  • the flame front is to be extinguished by the extinguishing agent.
  • the extinguishing agent is introduced into an extinguishing area of the gas line with an overpressure.
  • this extinguishing area is an area within the gas line in which the extinguishing agent develops an extinguishing effect.
  • An overpressure is to be understood in particular as a pressure which is above normal atmospheric pressure.
  • the extinguishing agent is preferably introduced at an overpressure compared to the pressure prevailing in the gas line during normal operation, which is also referred to as the operating pressure.
  • the overpressure is preferably at least 10 bar, particularly preferably at least 20 bar.
  • the overpressure makes it possible, in particular, to use a smaller amount of extinguishing agent than would be possible without such an overpressure, since the overpressure can result in better and finer atomization of the extinguishing agent, for example water, with the total surface area of the extinguishing agent increasing in relation to its volume becomes.
  • a larger quantity of extinguishing agent can be fed into the gas line per unit of time. This is advantageous in order to extinguish the flame front, which is moving at high speed, in a targeted and precise manner with a sufficiently large amount of extinguishing agent.
  • the overpressure is preferably selected in such a way that at least half of the extinguishing agent, in particular all of the extinguishing agent, is introduced into the gas line within 30 milliseconds.
  • a barrier liquid is introduced into a barrier area of the gas line.
  • the blocking area is the area within the gas line in which the blocking liquid develops a blocking effect. This means that it remains in the blocking area in such a way that a gas flowing through the gas line flows through the blocking liquid. The liquid consequently forms a barrier against further flame fronts.
  • a non-flammable liquid, in particular water, is preferably used as the sealing liquid. It is possible and advantageous in some embodiments of the invention if at least part, in particular the entire barrier liquid, is introduced into the gas line under an overpressure. As a result, a blocking effect of the blocking liquid can be established more quickly. However, due to the device that may be necessary to apply the pressure, there is often a higher risk of failure.
  • the sealing liquid is particularly preferably introduced into the gas line only under the influence of gravity.
  • the barrier liquid remains in the barrier area of the gas line in such a way that gas flowing through the gas line flows through the barrier liquid in the barrier area.
  • it is also according to the invention if there is a mixture or layering of sealing liquid and extinguishing agent through which the gas flows. This means that at least one point of the cross-section of the gas line through which the gas can flow is completely filled with sealing liquid or with a mixture or layering of sealing liquid and extinguishing agent. Consequently, the gas flowing through the gas line cannot flow past the liquid, but must pass through the barrier formed in this way.
  • such a barrier offers the advantage that a second or further flame front reaching the barrier area cannot penetrate through the barrier liquid and/or is extinguished by it.
  • the limit values of the throughflow speed and volume specified for the respective design of the extinguishing device must be observed.
  • the barrier liquid introduced into the barrier area prevents movement of a flame front from one side of the barrier area to the other side of the barrier area.
  • the sealing liquid is preferably introduced into the line after the extinguishing agent.
  • the extinguishing agent for extinguishing the flame front is first introduced into the gas line and then the barrier liquid is introduced into the barrier area.
  • the fact that this takes place one after the other is also understood in particular when the extinguishing agent and the sealing liquid are introduced at the same time partially overlap, but the majority of the barrier liquid is introduced into the gas line after the extinguishing agent.
  • the extinguishing agent is preferably the sealing liquid at the same time.
  • the erasing area and the blocking area preferably correspond spatially at least partially, in particular one of the areas is completely part of the other area.
  • the extinguishing and the introduction of the sealing liquid preferably take place in the same area within the gas line. This makes it possible, for example, to configure the device required for introducing the extinguishing agent and for introducing the sealing liquid as a single assembly, since these do not have to be arranged at locations that are spaced apart from one another.
  • the blocking area and/or the extinguishing area are preferably located in a space specially designed for this purpose within the gas line.
  • the room is, for example, part of a separate extinguishing device that is used or integrated into the gas line. Since the barrier liquid increases the flow resistance after the first flame front has been extinguished, the gas line should be restored to its original condition. This is particularly easy if the separate extinguishing device can be replaced.
  • the space in the gas line that serves as a blocking area and/or as an extinguishing area has a drain device through which the blocking liquid can be drained from the blocking area. To do this, the gas line should be closed and the gas flow stopped.
  • a closure is advantageously opened, in particular a valve is switched and/or a membrane is destroyed.
  • the excess pressure destroys a membrane that separates the extinguishing agent from the extinguishing area in terms of flow in order to introduce the extinguishing agent into the extinguishing area.
  • a pressure surge is preferably exerted on the extinguishing agent. This can be applied in addition to an already existing overpressure under which the extinguishing agent can be.
  • a high level of reliability and a low susceptibility to errors is extremely advantageous, since failure of the method can lead to a serious catastrophe.
  • the extinguishing agent is introduced into the extinguishing area by exerting excess pressure on the extinguishing agent through a membrane that is destroyed as a result, there is a high level of fail-safety.
  • a valve is not necessarily required to introduce the extinguishing agent. Rather, preferably only a pressure surge is exerted on the extinguishing agent, which is so strong that it destroys the membrane.
  • the membrane can, for example, consist of a plastic, in particular PTFE. However, it is also possible and advantageous in some embodiments for the membrane to consist of a metal or an alloy. As a result, for example, higher pressures in an extinguishing agent container are possible without the membrane being destroyed as a result.
  • the membrane is preferably only destroyed by an additional pressure surge. As a rule, normal pressure prevails in the extinguishing agent before the device is triggered.
  • the extinguishing agent is preferably subjected to a single pressure surge, which destroys the membrane.
  • the membrane preferably has at least one, preferably several material weakenings.
  • the invention therefore achieves the object by means of an extinguishing device which has at least one container for holding extinguishing agent and sealing liquid, as well as an overpressure device for generating an overpressure and is set up to carry out a method according to one of the preceding claims, the extinguishing device being arranged in such a way that the extinguishing agent can be introduced from the container under an overpressure generated by the overpressure device into an extinguishing area of the gas line and the sealing liquid can be introduced into a blocking area of the gas line.
  • the extinguishing device has at least one detector to be arranged in the gas line, the detector being set up to detect a flame front and the extinguishing device having an electronic controller, in particular an electronic data processing device, which is set up to carry out the Method according to one of the exemplary embodiments described here as a function of detector data from the at least one detector.
  • the extinguishing device has at least one space that is integrated into the gas line and thus becomes part of the gas line. If the flame front is extinguished in a space of the extinguishing device that has become part of the gas line when installed, this is regarded as extinguishing the flame front in the gas line.
  • the extinguishing device is therefore not arranged on the outside of the gas line, but is integrated into it, so that the gas flows through the space of the extinguishing device.
  • the at least one space of the extinguishing device has at least two openings through which the gas flows from an inlet section of the gas line through the extinguishing device in a discharge section of the gas line.
  • the extinguishing device preferably has a supply flange and a discharge flange, via which the extinguishing device is connected to the supply section and the discharge section of the gas line. When the gas line is in operation, the gas therefore flows from the feed line section of the gas line through the at least one space of the extinguishing device into the discharge line section. When installed, the extinguishing device is therefore part of the gas line.
  • the at least one space is designed and dimensioned specifically for the functions of the erasing device, namely erasing and blocking.
  • the erasing device can be replaced as a whole, for example after an erasing process has been carried out.
  • the extinguishing device it is also possible for the extinguishing device to have a draining device for the barrier liquid, with which the barrier liquid can be drained from the barrier area. In this way it is possible, for example, to continue to operate an erasing device even after an erasing process, without replacing it completely. If a membrane was destroyed to introduce the extinguishing agent, it can be replaced, for example.
  • an extinguishing agent container that has the membrane is replaced as a whole, so that work within the extinguishing device itself is not necessary.
  • the extinguishing area and/or the blocking area is preferably located in the at least one space of the extinguishing device. Both areas are particularly preferably located in the same space of the extinguishing device.
  • the opening of the space through which the gas flows in and/or the opening of the space through which the gas flows out is below a liquid level of the barrier liquid which this forms after it has been introduced into the barrier area. Only one of the two openings is preferably below the liquid level. This ensures that a gas flowing through the gas line flows through the sealing liquid in the sealing area. Underneath; the fact that the barrier liquid forms a liquid level is also understood in particular to mean that any extinguishing agent that is still present is present together with the barrier liquid, in particular mixed.
  • the extinguishing device preferably has at least one container for accommodating extinguishing agent and at least one container for accommodating sealing liquid.
  • the spatial separation of the two media makes it possible, in particular, to select different media as the extinguishing agent and sealing liquid. In addition, it is particularly easy to provide different volumes.
  • the extinguishing agent and the barrier liquid are preferably identical liquids, in particular water, with the extinguishing agent and/or the barrier liquid preferably being admixed with at least one additive, which in both liquids can be identical but can also be selected differently.
  • additives are, for example, substances that influence viscosity or density.
  • the barrier liquid and the extinguishing agent are different liquids or mixtures of different liquids. This makes it possible, for example, to match the different intended uses of the liquids.
  • the container for receiving the extinguishing agent which is also referred to as the extinguishing agent container, is preferably under pressure when the extinguishing agent has been filled in and the extinguishing device is ready for operation.
  • the extinguishing agent container is, for example, not completely filled with extinguishing agent, with the pressure being exerted by an amount of gas in the extinguishing agent container. This pressure causes the excess pressure when the extinguishing agent is introduced into the extinguishing area at least partially, in particular completely.
  • the extinguishing device particularly preferably has a pressure-generating device, by means of which the extinguishing agent can be subjected to a pressure surge.
  • a pressure-generating device by means of which the extinguishing agent can be subjected to a pressure surge.
  • This is, for example, a gas container with a compressed gas, which can be fed into the extinguishing agent container via a valve, in particular a quick-acting valve.
  • the pressure generating device is advantageously a gas generator, as is known, for example, from airbags or the like.
  • a pyrotechnic propellant charge with sodium azide or guanidine nitrate is used.
  • the extinguishing agent container is only separated by a membrane from the gas line or the space of the extinguishing device, which is part of the gas line.
  • This membrane is preferably designed as described above.
  • the at least one container is preferably designed to hold the extinguishing agent and the sealing liquid, with the container preferably having at least one extinguishing agent space and at least one sealing liquid space.
  • the at least one extinguishing agent chamber and the at least one sealing liquid chamber are preferably in fluid communication with one another or can at least be brought into connection.
  • the extinguishing agent space and the sealing liquid space can also exist without structural separation.
  • the extinguishing agent is preferably introduced into the extinguishing area of the gas line through an opening which may be closed by the membrane. Due to the fluidic connection between the extinguishing agent space and the sealing liquid space, the sealing liquid can also be introduced into the gas line through the same opening. If necessary, the fluidic connection must be established.
  • the extinguishing agent space and the sealing liquid space are preferably separated by a partition.
  • this partition there are preferably one or more valves which are opened when the sealing liquid is to be introduced into the Spree area.
  • the dividing wall is perforated and has at least one opening which establishes the fluidic connection between the extinguishing agent space and the sealing liquid space.
  • the extinguishing agent space and the sealing liquid space can also be arranged in two separate components, which then together form the container.
  • the spatial and structural separation between the extinguishing agent room and the sealing liquid room makes it possible to replace, remove, service or clean only one of the rooms.
  • the extinguishing agent space is particularly preferably surrounded at least partially, but preferably completely, by the sealing liquid space.
  • a plurality of sealing liquid chambers are preferably arranged radially on the outside around the central extinguishing agent chamber.
  • the individual sealing liquid chambers are preferably fluidically connected. In this way it is possible, for example, to introduce the extinguishing agent into the extinguishing area by means of a pressure surge exerted on the extinguishing agent in the extinguishing agent chamber, with the sealing liquid subsequently running out of the sealing liquid area and thus being introduced into the blocking area.
  • the extinguishing agent and the blocking liquid can preferably be triggered separately from one another, ie can be introduced into the extinguishing area or the blocking area.
  • the extinguishing device has at least one detector to be arranged in or on the gas line, the detector being set up to detect a flame front and the extinguishing device having an electronic controller, in particular an electronic data processing device, which is set up to carry out a method described here as a function of detector data from the at least one detector.
  • At least one detector for detecting such a flame front is arranged in the gas line.
  • a detector is, for example, a spark detector or an infrared flame detector.
  • the at least one detector is preferably arranged spatially in front of the extinguishing device in relation to a flow direction of the gas in the gas line.
  • the extinguishing device particularly preferably has at least two, more preferably at least five, detectors, which can be arranged in the gas line at different distances from the extinguishing device.
  • the extinguishing device is controlled by the electronic controller, and in particular an extinguishing process is initiated.
  • the extinguishing process is particularly preferred as a function of a distance from the respective detector that has detected a spark or a flame front from the extinguishing device.
  • the propagation speed of the flame front is particularly preferred based on a time interval between detector signals from different detectors, taking into account the spatial distance between the respective detectors , is determined and the erasing process is triggered as a function of the propagation speed determined in this way.
  • FIG 1 shows an exemplary embodiment of the extinguishing device 10 according to the invention, which can be integrated into a gas line 2 via a supply flange 22 and a discharge flange 20 .
  • a gas flows through the inlet connection piece 22 into an inner space 4 of the extinguishing device 10 and from there enters an outer space 6 .
  • the inner space 4 is designed to be open at the bottom, so that the gas flows into the outer space 6 .
  • the gas then leaves the quenching device 10 via the discharge flange 20.
  • a flame front generally moves in the opposite direction, i.e. it enters the quenching device 10 through the discharge flange 20 and leaves it through the inlet flange 22, provided that its progression does not pass through the quenching device 10 is prevented.
  • a container 12 is arranged above the inner space 4 and the outer space 6 .
  • This container 12 has a central cylindrical space 16 for extinguishing agent. This is completely surrounded laterally by a hollow-cylindrical sealing liquid space 18 .
  • the extinguishing agent space 16 and the sealing liquid space 18 are separated from one another by a peripheral perforated partition 17 . Due to the perforation of the perforated partition 17, the extinguishing agent space 16 and the sealing liquid space 18 are in permanent fluidic connection.
  • the extinguishing agent chamber 16 and the sealing liquid chamber 18 are filled with a liquid, in particular water.
  • the liquid in the extinguishing agent space 16 is the extinguishing agent and the liquid in the sealing liquid space 18 is the sealing liquid.
  • the extinguishing agent space 16 is fluidically separated from the inner space 4 by a membrane 8 .
  • This membrane 8 almost completely forms a bottom surface of the cylindrical extinguishing agent space 16.
  • a container with compressed gas 14 is arranged above the container 12.
  • the compressed gas present in the container with compressed gas 14 has in particular a pressure of at least 5 bar compared to normal atmospheric pressure.
  • the container 14 can be fluidically connected to the container 12 via a compressed gas line.
  • a quick-acting valve 15 is located within the compressed gas line. By opening this quick-acting valve 15, it is possible to introduce the pressurized gas from the container 14 into the extinguishing agent chamber 16 of the container 12.
  • the pressure surge exerted on the extinguishing agent in the extinguishing agent chamber 16 destroys the membrane 8 and the extinguishing agent enters the inner chamber 4 under overpressure.
  • the extinguishing area L is located in the inner space 4.
  • the barrier liquid flows out of the barrier liquid space 18 through the Perforations of the perforated dividing wall 17 into the extinguishing agent chamber and accordingly also through the destroyed membrane into the inner chamber 4.
  • the sealing liquid also flows into the outer chamber through the bottom opening, via which the inner chamber 4 is fluidically connected to the outer chamber 6 Room 6. All liquid remaining in the extinguishing device, i.e. the sealing liquid and possibly remaining extinguishing agent, form a liquid level.
  • the volume of the barrier liquid is dimensioned in such a way that the barrier liquid itself already forms a liquid level that lies above the bottom opening of the inner space 4 .
  • An identically high liquid level forms in the inner space 4 and the outer space 6. This level exceeds the bottom opening of the inner space 4, with the result that gas flowing into the extinguishing device 10 necessarily flows through the liquid. This results in the sealing effect of the sealing liquid against another flame front.
  • the container 12 now no longer contains any liquid, apart from any remaining amounts of liquid. Accordingly, the container 14 no longer contains any compressed gas. In other words, further erasing by means of the erasing device is no longer possible. However, due to the barrier effect of the barrier liquid, this is also not necessary.
  • the sealing liquid can be drained off via a drain device 23, for example. Then only the destroyed membrane 8 has to be replaced and the container 12 has to be filled again with liquid and the container 14 has to be filled again with pressurized gas. Alternatively, the empty container 12 and the empty container 14 can be exchanged for filled ones.
  • figure 2 shows the erasing device 10 from figure 1 in a perspective view.
  • the supply flange 22 and the discharge flange 20 for connection to the gas line 2 can be seen.
  • the cylindrical container 12 in which the extinguishing agent space 16 and the sealing liquid space 18 are arranged can also be seen.
  • Over a Compressed gas line, which has a quick-acting valve 15, the extinguishing agent chamber can be fluidly connected to the container 14.
  • the container 14 contains a compressed gas.
  • the extinguishing device 10 has a cover 25 and a base 27, these being connected via a cover flange 24 and a base flange 26 to a cylindrical housing in which the inner space 4 and the outer space 6 are located .
  • the container 12 and the container with the compressed gas 14 are preferably firmly connected to the lid 25 .
  • the membrane 8 is preferably arranged centrally in the cover 25 .
  • the cover flange 24 preferably has a recess corresponding to the membrane 8 . In this way it is possible, in particular, to also replace the destroyed membrane 8 by replacing the cover 25 . Work within the extinguishing device 10 can then in particular be omitted.
  • figure 3 shows the erasing device 10 from FIGS figures 1 and 2 in a gas line 2 integrated state. Unlike in figure 1 is at the in figure 3 illustrated quenching device 10 of the supply flange 22 shown on the left and the derivative flange 20 on the right side. Gas passes through the extinguishing device 10 in figure 3 consequently from left to right, a flame front in the opposite direction, i.e. from right to left.
  • the extinguishing device 10 is connected to a feed line section 19 of the gas line 2 via a flange corresponding to the feed line flange 22 .
  • the discharge flange 20 is connected to a discharge section 21 of the gas line 2 via a corresponding flange.
  • Detectors 28 are arranged in the supply line section 19 of the gas line 2 . These detectors are associated with the extinguishing device 10 and set up to detect a flame front. These are, for example, spark detectors.
  • the detectors 28 send detector signals, which encode, for example, a detected spark or a detected flame front, to an electronic control device 30.
  • the electronic control device controls based on these detector signals 30 the high-speed switching valve 15.
  • one of the detectors 28 detects a flame front in the gas line 2, it sends corresponding detector signals to the electronic control device 30. This then controls the high-speed switching valve 15 and opens it. The point in time of this opening is also determined, for example, based on a distance of the respective detector 28 from the extinguishing device 10 . By opening the quick-acting valve 15, the extinguishing process already described above is initiated.

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  • Public Health (AREA)
  • Business, Economics & Management (AREA)
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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Claims (11)

  1. Dispositif d'extinction (10) pour une conduite de gaz (2), et conduite de gaz (2), le dispositif d'extinction (10) présentant au moins un récipient (12) pour recevoir un agent d'extinction et un liquide de barrage, ainsi qu'un réceptacle avec du gaz comprimé ou un générateur de gaz pour générer une surpression, le dispositif d'extinction étant disposé de telle sorte que l'agent d'extinction provenant du récipient peut être introduit dans une zone d'extinction de la conduite de gaz sous une surpression générée par le réceptacle avec du gaz comprimé ou par le générateur de gaz et que le liquide de barrage peut être introduit dans une zone de barrage de la conduite de gaz, le dispositif d'extinction comprenant au moins un détecteur (28) destiné à être placé dans la conduite de gaz (2), le détecteur (28) étant conçu pour détecter un front de flamme, et le dispositif d'extinction (10) comprenant une commande électronique (30), en particulier un dispositif électronique de traitement de données, qui est conçu pour mettre en oeuvre un procédé comprenant les étapes suivantes consistant à :
    (a) détecter le front de flamme au moyen du détecteur (28),
    (b) introduire un agent d'extinction sous une surpression dans la zone d'extinction (L) de la conduite de gaz (2) pour éteindre le front de flamme, et en outre
    (c) introduire un liquide de barrage dans la zone de barrage (S) de la conduite de gaz (2), de sorte que le liquide de barrage demeure dans la zone de barrage (S) de telle manière qu'un gaz s'écoulant à travers la conduite de gaz (2) s'écoule à travers le liquide de barrage dans la zone de barrage (S),
    la zone de barrage étant située dans un compartiment du dispositif d'extinction (10) qui fait partie de la conduite de gaz et qui présente une ouverture par laquelle le gaz entre dans ledit compartiment et laquelle est située en dessous d'un niveau de liquide du liquide de barrage que celui-ci forme après avoir été introduit dans la zone de barrage.
  2. Dispositif d'extinction selon la revendication 1,
    caractérisé en ce que le liquide de barrage introduit dans la zone de barrage (S) lors de la mise en oeuvre du procédé empêche le mouvement d'un front de flamme depuis un côté de la zone de barrage (S) vers l'autre côté de la zone de barrage (S).
  3. Dispositif d'extinction selon la revendication 1 ou 2,
    caractérisé en ce que, lors de la mise en oeuvre du procédé, le liquide de barrage est introduit dans la conduite de gaz (2) temporellement après l'agent d'extinction.
  4. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que l'agent d'extinction est en même temps le liquide de barrage.
  5. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que la zone d'extinction (L) et la zone de barrage (S) coïncident au moins partiellement dans l'espace, en particulier l'une des zones (L, S) fait entièrement partie de l'autre zone (S, L).
  6. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que, lors de la mise en œuvre du procédé, pour introduire l'agent d'extinction dans la zone d'extinction (L), un obturateur est ouvert, en particulier une vanne est commutée ou une membrane (8) est détruite.
  7. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que, lors de la mise en œuvre du procédé, la surpression détruit une membrane (8) qui sépare fluidiquement l'agent d'extinction de la zone d'extinction (L), afin d'introduire l'agent d'extinction dans la zone d'extinction (L).
  8. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'extinction (10) comprend un réceptacle (14) avec du gaz comprimé ou un générateur de gaz pour générer la surpression.
  9. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que ledit au moins un récipient (12) est conçu pour recevoir l'agent d'extinction et le liquide de barrage, ledit récipient (12) comprenant de préférence au moins un compartiment d'agent d'extinction (16) et au moins un compartiment de liquide de barrage (18), qui, de préférence, sont en communication fluidique ou peuvent être mis en communication fluidique l'un avec l'autre.
  10. Dispositif d'extinction selon l'une des revendications précédentes, caractérisé en ce que l'agent d'extinction et le liquide de barrage peuvent être déclenchés séparément l'un de l'autre, c'est-à-dire être introduits dans la zone d'extinction ou dans la zone de barrage.
  11. Utilisation d'un dispositif d'extinction selon l'une des revendications précédentes pour éteindre un front de flamme dans une conduite de gaz (2).
EP19173939.0A 2018-06-08 2019-05-10 Procédé d'extinction d'un front de flamme et dispositif d'extinction Active EP3578232B1 (fr)

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DE102018113770.2A DE102018113770A1 (de) 2018-06-08 2018-06-08 Verfahren zum Löschen einer Flammenfront und Löschvorrichtung

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US20150238787A1 (en) * 2012-08-27 2015-08-27 Stuvex International Nv Valve Device and Method for Preventing Explosion Propagation
WO2017070737A1 (fr) * 2015-10-30 2017-05-04 Commonwealth Scientific And Industrial Research Organisation Système de tuyauterie
CN105381559A (zh) * 2015-12-17 2016-03-09 天津骏睿科技有限公司 一种水封式防爆器

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CN110575633A (zh) 2019-12-17
DE102018113770A1 (de) 2019-12-12
EP3578232A1 (fr) 2019-12-11
CN110575633B (zh) 2022-06-14
US11602653B2 (en) 2023-03-14
US20190374801A1 (en) 2019-12-12

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