EP2821700B1 - Lance de combustion ou de torchage de gaz d'échappement combustibles - Google Patents

Lance de combustion ou de torchage de gaz d'échappement combustibles Download PDF

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Publication number
EP2821700B1
EP2821700B1 EP14450033.7A EP14450033A EP2821700B1 EP 2821700 B1 EP2821700 B1 EP 2821700B1 EP 14450033 A EP14450033 A EP 14450033A EP 2821700 B1 EP2821700 B1 EP 2821700B1
Authority
EP
European Patent Office
Prior art keywords
lance
waste gas
conical
gas channel
lance according
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.)
Active
Application number
EP14450033.7A
Other languages
German (de)
English (en)
Other versions
EP2821700A1 (fr
Inventor
Andreas Kraxner
Thomas Bartonek
Laszlo Klena
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.)
COTRACO Holding GmbH
Original Assignee
COTRACO Holding GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by COTRACO Holding GmbH filed Critical COTRACO Holding GmbH
Publication of EP2821700A1 publication Critical patent/EP2821700A1/fr
Application granted granted Critical
Publication of EP2821700B1 publication Critical patent/EP2821700B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/08—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks
    • F23G7/085—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks in stacks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N2005/185—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of fuel

Definitions

  • the invention relates to a lance for the combustion or flaring flammable exhaust gases, comprising an annular cross-section, with an outlet opening in communication associated exhaust passage, wherein the exhaust passage is equipped with adjusting means for adjusting the flow cross-section.
  • the area below the lower explosive limit, where the concentration of the combustible substance is too low, is also referred to as a lean mixture.
  • the area above the upper explosion limit is called a rich mixture.
  • concentration of the combustible substance is too high to explode.
  • the difficulty lies in ensuring the required minimum flow rate even with highly fluctuating amounts of the exhaust gas flowing out per unit time.
  • the minimum flow rate also depends on the temperature at the outlet opening of the torch or the lance, so that in this respect an adjustment of the torch and the lance is required.
  • the flow cross-section of the exhaust gas duct is usually rigid, so that it is not possible to regulate a constant outlet velocity in the event of a change in the volume flow. Therefore, such lances have a very small volume flow variation range of about 1: 2 to 1: 5.
  • air, steam or nitrogen can be added to the exhaust gas in such lances in order to maintain the minimum volume flow and thereby the minimum speed.
  • adjustment of the flow area of the exhaust passage of the lance is possible, however, in these embodiments, maintaining a certain minimum flow rate is only selective, i.e., at least one time. ensured at a single point along the flow path, so that the relevant safety regulations can not be satisfactorily met.
  • the present invention therefore aims to expand the working range of lances of the type mentioned, so that the lance can ensure the required remindzünd precisely even at very widely varying volume flow, and in particular even at very low flow.
  • the lance should be completely dispensed with the admixture of air, steam or nitrogen to the exhaust gas.
  • the invention essentially provides for a lance of the type mentioned that the adjustment means a coaxially mounted inside an outer combustion tube, in the axial direction of the lance between a minimum position for the smallest flow cross-section and a maximum position for the largest flow cross-section adjustable Actuator comprise whose conical outer surface bounds the annular exhaust passage together with an associated further conical surface inside and outside, wherein the conical surfaces overlap each other in the minimum position, wherein the actuating body is formed by a the exhaust passage inside limiting body with a conical outer circumferential surface, and wherein the another conical surface (9) is a conical inner peripheral surface of the outer combustion tube (1), whose diameter increases continuously in the direction of the outlet opening (10) of the lance.
  • the adjustable adjusting body has a conical lateral surface, which determines the annular gap of the exhaust passage in this section together with a likewise conical further surface
  • the gap width can be adjusted continuously and in a simple manner by relative displacement of the actuating body relative to the lance. If necessary, the flow cross-section of the annular exhaust gas duct is adjusted so that the respectively required minimum flow velocity in the area of the adjusting body results. Due to the arrangement of each other Cone surfaces, the gap width or the flow cross-section can be set within wide limits, wherein the ratio of the maximum flow cross-section to the minimum flow cross-section among others depends on the cone angle of the respective conical surfaces and the intended displacement between the minimum and the maximum position. According to a preferred embodiment, it is provided that the opening angle of the cone of the conical lateral surface and / or the cone of the further conical surface is between 10 and 30 °.
  • the system of two mutually associated, the annular gap width defining and adjustable relative to each other in the axial direction conical surfaces allows further, as provided for in the invention, even in the minimum position to provide a surface coverage, so that the respective annular gap width is not only punctually, but ensures a minimum length , As a result, the minimum flow velocity prescribed in the relevant regulations can be controlled and ensured over a certain minimum axial travel, so that the operational safety can be increased.
  • the overlap length here refers to that axial region in which the conical lateral surface of the actuating body and the additional conical surface assigned to it overlap one another.
  • the overlap length in the minimum position is at least 20 mm, preferably at least 40 mm.
  • the cover length in the minimum position corresponds to at least 50%, preferably at least 75%, preferably at least 90%, preferably 100% of the overlap length in the maximum position. Ideally, the overlap length thus remains over the entire Umstellweg between the minimum position and the maximum position equal.
  • the mutually associated conical surfaces are preferably designed such that the gap width defined by the conical surfaces or the cross-sectional area of the exhaust gas duct in the minimum position and optionally in the maximum position of the actuating body in the region of the overlap is constant.
  • a constant gap width can be achieved in the overlap area with advantage in that the further conical surface extends parallel to the conical lateral surface of the actuating body.
  • the setting of the flow cross-section required for the respective minimum flow velocity is arranged as close as possible to the outlet opening, ie as close as possible to the point affected by the risk of re-ignition.
  • This can be achieved in a structurally particularly simple manner by virtue of the fact that, as is the case with a preferred development, the adjusting body limits the end section of the exhaust duct having the outlet opening inside or outside.
  • the annular exhaust duct thus opens directly into the combustion chamber, so that the combustion chamber-side outlet opening of the exhaust passage is also annular.
  • a further preferred embodiment provides that the exhaust gas channel in the flow direction in front of the adjusting body has a cross-sectional reduction, whereby an acceleration of the exhaust gas succeeds before the actuating body, so that the lance is also suitable for very small amounts of exhaust gas per unit time.
  • the surface temperature of the lance can preferably be kept low by the fact that the exhaust duct surrounds an annular channel for cooling or combustion air. If said annular channel opens into the combustion chamber radially outside the exhaust gas duct, the effect is further achieved that the cooling or combustion air, when entering the combustion chamber, ensures a first thorough mixing of the required combustion air with the exhaust gas.
  • the axially displaceable actuating body is preferably actuated by an automatic actuator, for which purpose the actuating body is preferably connected to an actuating element, in particular a tube, which cooperates with a drive.
  • the drive is controlled by an automatic control device which automatically sets the flow cross section required for the respective minimum flow velocity.
  • a preferred development provides for a sensor to be arranged for the volume flow of the exhaust gas flowing into the lance or for a measured variable derived therefrom, such as the pressure, the measured values of which are fed to a control device which cooperates with an actuator for the control element to keep the exhaust gas velocity at the exit opening above a predetermined threshold.
  • the control takes place In this case, preference is given to the fact that the control device has stored at least one characteristic curve for the actuating body position as a function of sensor measured values.
  • FIG. 1 a schematic cross-sectional view of a combustion chamber facing end portion of the lance according to the invention with the actuating body in a first position and Fig. 2 the lance according to Fig. 1 with the actuator in a second position.
  • Fig. 1 is an outer combustion tube 1, in the interior of a coaxial actuator body 2 is mounted according to the double arrow 3 adjustable in the axial direction.
  • the actuating body 2 is attached to a coaxial inner tube 4, which limits the annular exhaust passage 5 inside.
  • the annular exhaust gas duct 5 is delimited by the outer tube 1.
  • the outer tube 1 In the flow direction before the actuating body 2, the outer tube 1 has a ramp-like transition 6 between a rear portion 7 with a smaller wall thickness and a front portion 8 with greater wall thickness, resulting in the region 6, a cross-sectional constriction of the exhaust passage 5.
  • the outer tube 1 is provided with a conical inner circumferential surface 9 whose diameter continuously increases in the direction of the outlet opening 10 of the lance.
  • the conical surface 9 is associated with a conical lateral surface 11 of the actuating body 2, which runs parallel to the conical surface 9, so that in the region of the overlap a of the two conical surfaces 9, 11 results in a uniform width of the annular gap of the exhaust passage 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Regulation And Control Of Combustion (AREA)

Claims (12)

  1. Lance de combustion ou de torchage de gaz d'échappement combustibles, comprenant un canal de gaz d'échappement (5), à section transversale annulaire, communiquant avec une ouverture de sortie, dans laquelle le canal de gaz d'échappement (5) est doté de moyens de réglage pour le réglage de la section transversale d'écoulement, dans laquelle les moyens de réglage comprennent un corps de réglage (2) logé coaxialement à l'intérieur d'un tube de combustion extérieur (1), réglable dans la direction axiale de la lance entre une position minimum pour la section transversale d'écoulement la plus petite et une position maximum pour la plus section transversale d'écoulement la plus grande, dont la surface d'enveloppe conique (11) délimite à l'intérieur et à l'extérieur le canal de gaz d'échappement annulaire (5) conjointement avec une autre surface conique (9) affectée, dans laquelle le corps de réglage (2) est formé d'un corps délimitant à l'intérieur le canal de gaz d'échappement (5) avec une surface d'enveloppe extérieure conique (11), dans laquelle l'autre surface conique (9) représente une surface périphérique intérieure conique du tube de combustion extérieur (1), dont le diamètre augmente en continu en direction de l'ouverture de sortie (10) de la lance, et dans laquelle les surfaces coniques (9, 11) se recouvrent l'une l'autre dans la position minimum.
  2. Lance selon la revendication 1, dans laquelle la longueur de recouvrement (a) dans la position minimum est d'au moins 20 mm, de préférence d'au moins 40 mm.
  3. Lance selon la revendication 1 ou 2, dans laquelle la longueur de recouvrement dans la position minimum correspond à au moins 50 %, de préférence au moins 75 %, de préférence au moins 90 %, de préférence 100 % de la longueur de recouvrement dans la position maximum.
  4. Lance selon la revendication 1, 2 ou 3, dans laquelle la largeur de fente définie par les surfaces coniques (9, 11) ou la surface de section transversale du canal de gaz d'échappement (5) est constante dans la position minimum et le cas échéant dans la position maximum du corps de réglage (2) dans la zone du recouvrement.
  5. Lance selon l'une quelconque des revendications 1 à 4, dans laquelle l'autre surface conique (9) s'étend parallèlement à la surface d'enveloppe conique (11) du corps de réglage (2).
  6. Lance selon l'une quelconque des revendications 1 à 5, dans laquelle le diamètre de la surface d'enveloppe extérieure conique (11) augmente en direction de l'ouverture de sortie (10).
  7. Lance selon l'une quelconque des revendications 1 à 6, dans laquelle le corps de réglage (2) délimite à l'intérieur la section d'extrémité du canal de gaz d'échappement (5) présentant l'ouverture de sortie (10).
  8. Lance selon l'une quelconque des revendications 1 à 7, dans laquelle l'ouverture de sortie côté chambre de combustion (10) du canal de gaz d'échappement (5) est annulaire.
  9. Lance selon l'une quelconque des revendications 1 à 8, dans laquelle le canal de gaz d'échappement (5) présente dans la direction d'écoulement avant le corps de réglage (2) une réduction de la section transversale.
  10. Lance selon l'une quelconque des revendications 1 à 9, dans laquelle le canal de gaz d'échappement (5) entoure un canal annulaire (13) pour air de refroidissement ou de combustion.
  11. Lance selon l'une quelconque des revendications 1 à 10, dans laquelle un capteur pour le débit volumique du gaz d'échappement s'écoulant dans la lance ou pour une grandeur de mesure en découlant, comme par exemple la pression, est agencé, dont les valeurs de mesure sont amenées à un dispositif de commande, lequel coopère avec un entraînement de réglage pour le corps de réglage (2).
  12. Lance selon la revendication 11, dans laquelle le dispositif de commande a enregistré au moins une courbe caractéristique pour la position de corps de réglage.
EP14450033.7A 2013-07-02 2014-06-12 Lance de combustion ou de torchage de gaz d'échappement combustibles Active EP2821700B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT5492013A AT513618B1 (de) 2013-07-02 2013-07-02 Lanze für die Verbrennung oder Abfackelung von brennbaren Abgasen

Publications (2)

Publication Number Publication Date
EP2821700A1 EP2821700A1 (fr) 2015-01-07
EP2821700B1 true EP2821700B1 (fr) 2017-12-20

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EP14450033.7A Active EP2821700B1 (fr) 2013-07-02 2014-06-12 Lance de combustion ou de torchage de gaz d'échappement combustibles

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EP (1) EP2821700B1 (fr)
AT (1) AT513618B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110038458A (zh) * 2019-05-10 2019-07-23 无锡顺盟科技有限公司 一种燃气管道匀混器
CN110260326B (zh) * 2019-06-05 2024-06-11 李跃飞 多层多腔式余热燃烧炉
CN113046506A (zh) * 2021-02-09 2021-06-29 山东省冶金设计院股份有限公司 一种带变截面喷嘴燃烧器的顶燃式热风炉

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217363A (en) * 1992-06-03 1993-06-08 Gaz Metropolitan & Co., Ltd. And Partnership Air-cooled oxygen gas burner assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518080A1 (de) * 1985-05-20 1986-11-20 Stubinen Utveckling AB, Stockholm Verfahren und vorrichtung zum verbrennen fluessiger und/oder fester brennstoffe in pulverisierter form
DE3520781A1 (de) * 1985-06-10 1986-12-11 Stubinen Utveckling AB, Stockholm Verfahren und vorrichtung zum verbrennen fluessiger und/oder fester brennstoffe in pulverisierter form
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments
US20100291492A1 (en) * 2009-05-12 2010-11-18 John Zink Company, Llc Air flare apparatus and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217363A (en) * 1992-06-03 1993-06-08 Gaz Metropolitan & Co., Ltd. And Partnership Air-cooled oxygen gas burner assembly

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Publication number Publication date
AT513618B1 (de) 2014-06-15
EP2821700A1 (fr) 2015-01-07
AT513618A4 (de) 2014-06-15

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