EP2198931B1 - Verfahren und Vorrichtung zum Löschen von Funken transportiert durch einen Strom von Gas - Google Patents

Verfahren und Vorrichtung zum Löschen von Funken transportiert durch einen Strom von Gas Download PDF

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Publication number
EP2198931B1
EP2198931B1 EP09178384A EP09178384A EP2198931B1 EP 2198931 B1 EP2198931 B1 EP 2198931B1 EP 09178384 A EP09178384 A EP 09178384A EP 09178384 A EP09178384 A EP 09178384A EP 2198931 B1 EP2198931 B1 EP 2198931B1
Authority
EP
European Patent Office
Prior art keywords
sparks
gas
extinguishing
perturbation
particles
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.)
Not-in-force
Application number
EP09178384A
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English (en)
French (fr)
Other versions
EP2198931A1 (de
Inventor
Jérémy Cyffka
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.)
Tecfidis
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Tecfidis
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Publication date
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Priority to PL09178384T priority Critical patent/PL2198931T3/pl
Publication of EP2198931A1 publication Critical patent/EP2198931A1/de
Application granted granted Critical
Publication of EP2198931B1 publication Critical patent/EP2198931B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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

Definitions

  • the invention relates to a device and a method for extinguishing sparks.
  • This device and method are intended to prevent fires in installations or gases and / or fumes are transported. They are in particular intended to prevent fires in dust and / or soot filtration devices transported with gases, in particular flue gases.
  • the invention also relates to an installation comprising a previously mentioned device mounted upstream of a filtration device or integrated with a filtration device.
  • the device and method may in particular be used, upstream of filtering devices, in the flue gas discharge ducts of boiler rooms, in particular boilers using wood combustion or in gas evacuation ducts and / or dust produced at any level of an industrial process, in particular at a grinding dust suction station on a metal part deburring station or at a gas suction station released during of the melting of metals in the field of iron and steel industry.
  • spark is understood to mean any incandescent particle and the notion of an electric spark which is formed by an electric arc made possible by the ionization of a non-conductive medium is excluded.
  • the sparks are transported by the gases circulating in the installations.
  • this installation comprises a filtration device, the spark is transported to this device.
  • the filter comprises fusible and / or combustible filter elements
  • problems are pose. In fact, sparks arriving on fusible filter elements melt and locally pierce these elements. As a result, the filtration device is damaged and can no longer provide the performance for which it was designed.
  • sparks on combustible filter elements can ignite these elements. Therefore, a fire can occur in the filter device that can be completely destroyed. Such a fire also involves a significant risk to the safety of property and people in the vicinity.
  • a first solution consists in detecting the presence of sparks at the level of a duct carrying gases by means of a detector using for example a technology based on infrared radiation and injecting, in the duct, downstream from the location of the detection, a product to extinguish sparks.
  • the product can be a liquid, such as water, injected for example in the form of fog.
  • the product can also be a non-oxidizing powder or gas. Examples of implementation of this first solution are for example known documents EP1422675 , DE20004490 , US4194570 and US3885631 .
  • a second solution is also to detect the presence of sparks in a gas-carrying pipe by means of a detector using, for example, a technology based on infrared radiation and to stop the gases or deflect them out of the atmosphere. driving downstream of the place of detection.
  • Examples of implementation of this first solution are for example known documents DE20004490 , IT1223223 and EP0885633 .
  • Document is also known GB 2 183 020 a device for stopping a flame propagating in a pipe.
  • the structure of such a device comprises a set of annular plates arranged at a distance from each other.
  • Such a device does not make it possible to extinguish sparks transported in a flow of gas.
  • the object of the invention is to provide a device and a spark quenching method that overcomes the disadvantages mentioned and improves the spark quenching devices and methods known from the prior art.
  • the invention provides a device and a method implementing simple means, inexpensive and easy to implement, easy installation and maintenance operations are reduced.
  • the invention also provides a device and a method without consequences on possible downstream gas treatment processes.
  • the device according to the invention is defined by claim 5.
  • the installation represented at figure 1 comprises a system at which sparks 12 are produced, such as in particular a grinding station, a welding station, a steel furnace, a boiler.
  • the sparks produced are transported by gases in a first pipe 3 to a spark extinguishing device 4. After passing through this device, gas and particles 13 (sparks extinguished) pass through a second pipe 5 allowing them to 6.
  • the gases making it possible to set the sparks and the particles in motion are themselves set in motion by means of a fan, in particular a fan arranged in the filtering device, upstream or downstream of the means for filtering. filtration of the filtration device.
  • the extinguishing device can be integrated into the filtration device.
  • the filtration device is preferably of the type with fusible and / or combustible filtering means.
  • the filtration means are for example sleeves having a closed end and an open end and mounted on supports, for example metal called mannequins.
  • the filter elements are arranged so that the gases must pass through the material, for example felt, forming the sleeves of the outside of the sleeves towards the inside of the sleeves. Crossing these sleeves, the particles are separated from the gases. Indeed, all particles larger than a critical size determined by the structure of the material constituting the sleeves are stopped at level of the outer surface of the sleeves. The gases emitted at the outlet of the filtration device are therefore devoid of particles larger than this critical size.
  • an extinguishing device 4 mainly comprises a housing 7, for example made of metal sheets and means 9a and 9b disturbance of the gas flow.
  • the housing comprises two communicating chambers 14 and 15 delimited by a partition 16.
  • the first chamber is connected to the pipe 3 from which gas and sparks 12 and possibly other extinguished particles arrive.
  • second chamber 15 is connected to the pipe 5 where the gases and the extinguished particles 13 leave in the direction of the filtration device 6.
  • the gases, the sparks and the particles thus enter and pass through the first chamber 14 before entering and passing through the second chamber 15.
  • the aeraulic sections of the chambers can be dimensioned so that the velocity of the gases is lower in the rooms to what it is in the pipes.
  • a first means 9a for disturbing the flow of gas In the first chamber 14 is a first means 9a for disturbing the flow of gas.
  • disturbance means any means for modifying the characteristics of the gas velocity vector, that is to say its direction and / or its norm. Indeed, these disturbances have a very important effect on the sparks. Sparks have a high density compared to gases so a significant inertia compared to that of the gases. carrying. Thus, a sudden disruption in gas velocity creates significant relative velocities between gases and sparks. These relative speeds make it possible, when the gases containing oxygen, to stoke and consume the sparks. In the case of sparks formed by metal particles, the relative speeds can cool them. Thus, after the first disruption means 9a a portion of the sparks has been extinguished. Paradoxically, we get the extinction of the sparks by stoking them until they are completely consumed.
  • the disturbance means makes it possible to increase the distance traveled by the sparks in the extinguishing device.
  • disurbance means excludes any means of connection between two pipes having different airspace section areas and / or any means of connection between two pipes having different directions or directions.
  • disurbance means also excludes any network of tubes or fins of an exchanger that would be placed in the gas flow.
  • the gases, the particles and the sparks then pass into a second disturbance means 9b in the second chamber.
  • the same effect is obtained so that after the second means of disturbance all the sparks are extinguished and there is no longer a risk of fire at the filtration device 6 downstream.
  • the plates defining the chambers 14 and 15 here constitute guide means for channeling the flow of gases through the first and second perturbation means.
  • the gas velocity is at least substantially parallel and in the same direction as the gravitational acceleration and, preferably, in the second chamber, the gas velocity is at least substantially parallel and of sense opposite to gravity acceleration.
  • a separation of particles and sparks on the one hand, and gas on the other hand, by centrifugation and action of the gravitational acceleration, the flow of gas effecting a rotational movement between both rooms.
  • a particle recovery means such as a tank at this level. Only the largest particles will be recovered at this level.
  • the flow disruption means comprises a network of wires in the spark-laden gas stream. These wires are non-combustible and non-fusible in contact with sparks.
  • the wires are metal wires. Preferably, they are juxtaposed. They can also be woven. Advantageously, they constitute a mat.
  • the gases must pass between these wires to join the pipe 5.
  • the density of the son, their diameter, their spacing are determined according to the perturbation characteristics that one wishes to obtain. Obviously, the more spaces between the wires will be limited in size and number, the more we will disrupt the flows.
  • the size of the spaces between the wires determines the size of the particles that can pass through the disturbance means and the size of those that will be blocked by the disturbance means.
  • the limit size of the particles that can pass through the first perturbation means will be greater than that of the particles that can pass through the second perturbation means.
  • the diameter of the wires may be between 0.01 mm and 3.5 mm. For example, it may be 0.2 mm.
  • the maximum distance between centers two wires disposed in a plane at least substantially perpendicular to the overall direction of the gas flow may be between 0.01 mm and 1 mm. For example, it may be 0.02 mm.
  • the abovementioned distance distances determine the critical size of the sparks that will be retained by the son and will remain fanned for a long time in the gas flow. It is important that sparks with a size greater than this critical size be retained because if they were not they could still be fanned through the disturbance means and reach the incandescent filtration device. Particles smaller than this critical size are considered unable to reach the filter device in an incandescent state. Indeed, the phases in which they are stoked enough to consume them completely.
  • the parameters will be set according to the nature of the sparks (in particular their material wood, metal ...), the number of passage in disturbance means and the distance between the extinguishing device of the filtration device.
  • the son can be arranged in a row in a plane substantially perpendicular to the overall direction of the gas flow.
  • the disturbance means comprises several rows of wires at least substantially parallel and offset with respect to each other, so that if a particle of gas passes through the first row of wires without being deflected, it is necessarily deflected by the action son of one of the successive rows or it has, at least, strong chances of being deflected by the action of son of one of successive rows.
  • Means for setting the disturbance means in motion make it possible to move the means in a continuous or discontinuous manner disturbance so that any particles blocked between the wires can be evacuated.
  • sparks that would be trapped between the wires are also subject to significant relative velocities of the gases that bypass them. Thus, these sparks can also be fanned and consumed quickly. Blocked particles between the wires help to disrupt the flow or flow of gases and particles.
  • the first perturbation means comprises a shaft 17 on which are fixed wires 10a extending at least substantially radially, the wires extending towards the laminations of the housing 7 coming into contact with those this.
  • the disturbance means substantially has a radial wire brush structure.
  • the second perturbation means has the same structure.
  • the moving means advantageously comprise a geared motor 11 in connection with the shaft 17. This shaft is guided by bearings and can be rotated.
  • wires come into contact with the laminations of the housing, they bend under the effect of the contact forces during their rotation. This allows effective release of particles that were jammed and that contributed to disrupting the flow or flow of gases and particles.
  • stops 23 on the plates are not sufficient. These stops having the function of bending even more strongly son and facilitate the release of particles stuck between the son.
  • the yarns can also bend under their own weight and / or under the effect of the gas flow and / or under the effect of variations in speed (in particular of rotation) of the disturbance means, without the need for contacts on the means of disturbance, in particular on the son.
  • the means of deformation of the disturbance means may be constituted by the structure of the perturbation means itself (in particular the diameters and lengths of the wires) and / or by a means for driving or setting in motion the means of disturbance.
  • the setting in movement or the displacement of the means of perturbation causes the deformation of the means of perturbation.
  • the whole of the disturbance means is set in motion or displaced.
  • the spark extinguishing device comprises only one means of disturbing the flow of gases. This means is placed in a single chamber and means are provided for moving the disturbance means.
  • the setting in motion can be ensured by any means which makes it possible to pass blocked particles downstream of the means of disturbance.
  • it can be provided by periodic manual action on a lever, a crank.
  • Blocked particles at the level of the disturbance means also contribute to disrupting the flow or flow of gases and particles.
  • the invention also relates to a method for extinguishing sparks carried by a gas flow. It is for example implemented by one of the devices described above. It comprises a step of channeling the gas flow to pass through a means of disturbing the flow so as to fan the sparks, the disruption means being non-fuse and non-combustible in contact with the sparks. It also comprises a step of deformation of the disturbance means so as to release particles stuck therein and / or a step of projecting gas under pressure towards the disturbance means so as to release particles stuck in it .
  • it also comprises a step of continuous or discontinuous displacement of the disturbance means, for example in rotation by action of a geared motor.
  • the process comprises several passages of the gas flow through distinct perturbation means.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Catching Or Destruction (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Claims (8)

  1. Verfahren zum Löschen von Funken (12), die von einem Gasstrom befördert werden, umfassend einen Schritt der Kanalisierung des Gasstroms, um diesen derart durch ein Mittel (9a) zur Störung des Stromes zu leiten, dass die Funken angefacht werden, wobei das Störmittel beim Kontakt mit den Funken weder schmelzen noch verbrennen kann, wobei das Verfahren dadurch gekennzeichnet ist, dass es einen Schritt umfasst, bei welchem das Störmittel derart verformt wird, dass darin festgehaltene Partikel freigesetzt werden.
  2. Löschverfahren nach Anspruch 1, dadurch gekennzeichnet, dass es einen Schritt umfasst, bei welchem das Störmittel kontinuierlich oder diskontinuierlich bewegt wird.
  3. Löschverfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es einen Schritt umfasst, bei welchem ein Druckgasstrahl derart auf das Störmittel gerichtet wird, dass die darin festgehaltenen Partikel freigesetzt werden.
  4. Löschverfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gasstrom dabei mehrmals durch verschiedene Störmittel (9a, 9b) geleitet wird.
  5. Vorrichtung (4) zum Löschen von Funken (12), die von einem Gasstrom befördert werden, umfassend ein Mittel (9a) zum Stören des Flusses, welches die Funken anfacht, und ein Mittel (7, 16) zur Kanalisierung des Gasstroms durch das Störmittel, wobei das Störmittel beim Kontakt mit den Funken weder schmelzen noch verbrennen kann, wobei die Vorrichtung dadurch gekennzeichnet ist, dass das Störmittel ein Netzwerk aus Drähten (10a, 10b) umfasst, die beim Kontakt mit den Funken weder schmelzen noch verbrennen können, und dadurch, dass die Vorrichtung ein Mittel (23) zur Verformung des Störmittels umfasst.
  6. Löschvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass sie ein Mittel (11) zur kontinuierlichen oder diskontinuierlichen Bewegung des Störmittels, wie insbesondere ein Mittel zum Drehen des Störmittels, umfasst.
  7. Löschvorrichtung nach einem der Ansprüche 5 bis 6, dadurch gekennzeichnet, dass es ein Mittel (21, 22) umfasst, welches einen Druckgasstrahl derart auf das Störmittel richtet, dass die im Störmittel festgehaltenen Partikel freigesetzt werden.
  8. Anlage (1), umfassend eine Löschvorrichtung (4) nach einem der Ansprüche 5 bis 7 und eine Filtrationsvorrichtung (6).
EP09178384A 2008-12-09 2009-12-08 Verfahren und Vorrichtung zum Löschen von Funken transportiert durch einen Strom von Gas Not-in-force EP2198931B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09178384T PL2198931T3 (pl) 2008-12-09 2009-12-08 Sposób i urządzenie do gaszenia iskier przenoszonych przez strumień gazu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0806882A FR2939322B1 (fr) 2008-12-09 2008-12-09 Procede d'extinction d'etincelles transportees par un flux de gaz

Publications (2)

Publication Number Publication Date
EP2198931A1 EP2198931A1 (de) 2010-06-23
EP2198931B1 true EP2198931B1 (de) 2011-07-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09178384A Not-in-force EP2198931B1 (de) 2008-12-09 2009-12-08 Verfahren und Vorrichtung zum Löschen von Funken transportiert durch einen Strom von Gas

Country Status (4)

Country Link
EP (1) EP2198931B1 (de)
AT (1) ATE515291T1 (de)
FR (1) FR2939322B1 (de)
PL (1) PL2198931T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014143A1 (de) * 2012-07-18 2014-01-23 Man Diesel & Turbo Se Gasführendes Svstem und damit ausgerüstete Brennkraftmaschine
CN108671642A (zh) * 2017-12-07 2018-10-19 王脯胜 生物质锅炉布袋除尘器火星阻火装置
CN110721537B (zh) * 2019-11-14 2024-08-16 安普科技有限公司 一种火花收集箱

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1681698A (en) * 1926-09-16 1928-08-21 Brooks Engineering Corp Flame arrester
DE582260C (de) * 1929-12-05 1934-01-20 Elektrochemische Ges M B H Einrichtung zur Sicherung von Behaeltern oder Rohrleitungen, die explosible Gase, wie Acetylen, aufspeichern oder leiten
US4307673A (en) * 1979-07-23 1981-12-29 Forest Fuels, Inc. Spark arresting module
GB2183020B (en) * 1985-11-14 1989-10-11 Barnes Ecas Limited A flame arrestor
GB9824532D0 (en) * 1998-11-10 1999-01-06 Colson Engineering Limited Flame arrester

Also Published As

Publication number Publication date
ATE515291T1 (de) 2011-07-15
PL2198931T3 (pl) 2011-12-30
FR2939322B1 (fr) 2011-11-11
EP2198931A1 (de) 2010-06-23
FR2939322A1 (fr) 2010-06-11

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