EP0149574A2 - Method for diluting a gas, or mixture of gases, with air before discharge to atmosphere - Google Patents

Method for diluting a gas, or mixture of gases, with air before discharge to atmosphere Download PDF

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Publication number
EP0149574A2
EP0149574A2 EP85400050A EP85400050A EP0149574A2 EP 0149574 A2 EP0149574 A2 EP 0149574A2 EP 85400050 A EP85400050 A EP 85400050A EP 85400050 A EP85400050 A EP 85400050A EP 0149574 A2 EP0149574 A2 EP 0149574A2
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EP
European Patent Office
Prior art keywords
gas
injection means
atmosphere
upstream
venturi
Prior art date
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Granted
Application number
EP85400050A
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German (de)
French (fr)
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EP0149574B1 (en
EP0149574A3 (en
Inventor
Michel Georges Toussaint
Michel Siard
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Total Marketing Services SA
Original Assignee
Compagnie Francaise de Raffinage SA
Compagnie de Raffinage et de Distribution Total France SA
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Application filed by Compagnie Francaise de Raffinage SA, Compagnie de Raffinage et de Distribution Total France SA filed Critical Compagnie Francaise de Raffinage SA
Priority to AT85400050T priority Critical patent/ATE30518T1/en
Publication of EP0149574A2 publication Critical patent/EP0149574A2/en
Publication of EP0149574A3 publication Critical patent/EP0149574A3/en
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Publication of EP0149574B1 publication Critical patent/EP0149574B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/311—Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam

Definitions

  • the present invention relates to the dilution in air of a gas or a gaseous mixture, before its rejection to the atmosphere.
  • the present invention aims to propose for this purpose a method which is easy to implement, even when the quantities of gas to be discharged are significant. It also aims to propose a method, the implementation of which requires a simple device and easy maintenance during use.
  • the subject of the invention is a process for the dilution in air of a gas or of a gaseous mixture, before its rejection into the atmosphere, using a device comprising a body. profile forming a venturi, open to the atmosphere at its two ends and at the upstream end of which said gas or gas mixture is introduced under pressure using an injection means, this process being characterized in that said gas or gas mixture is injected into said body in the form of a sheet with an annular cross section.
  • said gas or gaseous mixture will be injected into said body using a plurality of injection means offset from upstream to downstream and such that the successive layers of said second gas produced by said means have increasing cross sections d 'upstream downstream.
  • said venturi body and said injection means will have a symmetry of revolution about the same axis.
  • Said injection means may consist of an injector with an annular orifice.
  • It may also include a bundle of injectors whose circular orifices are arranged in a ring at the upstream end of the body bed forming a venturi.
  • the devices which can be used for implementing the method according to the invention are of a general type known per se (see, for example, FR-A- 1 451 539 or FR-A- 1 491 215).
  • FR-A- 1 451 539 or FR-A- 1 491 215 devices for the mixture of two gases and their application to the mixture of air and a combustible gas for the supply of burners or nozzles have been abundantly described in the literature, the application of such Devices for diluting a gas in air, before it is released to the atmosphere, is neither known nor suggested by the prior art.
  • a plurality of devices when the gas or the quantities of gas to be diluted in air before they are released to the atmosphere are very large, a plurality of devices will preferably be used, the venturi bodies of which will be open at their two ends and which will be arranged in parallel inside a tubular structure communicating at its two ends with the atmosphere.
  • an additional mixing effect will be obtained inside said tubular structure.
  • this structure will preferably form a venturi and said devices will preferably be arranged at its upstream part.
  • This combination of a plurality of similar devices also has the advantage that it is possible to dismantle one of the devices for maintenance operations without immobilizing the entire apparatus.
  • additional air inlets can be provided laterally in the downstream part of said venturi body, in order to increase the gas dilution effect.
  • the dilution in the air before rejection to the atmosphere must be such that one is outside the flammability limits for its constituents, in particular for hydrogen and methane, which is most commonly found in residual gases released to the atmosphere.
  • the divergent 3 opens into the atmosphere, either directly, or by means of non-represented auxiliary members.
  • the gas to be diluted before discharge to the atmosphere is supplied by an annular section nozzle 6, coaxial with the air inlet chamber 1 and provided with an annular section injector.
  • the nozzle 6 is pierced along its axis with a conduit 8, open at its two ends and which communicates with the atmosphere through its downstream end.
  • This duct 8 forms a second air inlet, which is added to that defined by the external walls of the nozzle 6 and the internal walls of the chamber 1.
  • the dilution in the air is carried out by entrainment of the air by the gas to be diluted, which acts as a driving agent, this gas being injected under pressure, in the form of a cylindrical or conical sheet, in contact with the air both by its external part and its internal part, diffusion and mixing with the air occurring very quickly, with a minimum pressure drop in contact with the walls.
  • the divergent 3 will be pierced laterally with orifices 4, near its downstream end, in order to increase the rate of dilution of the gas in the air.
  • FIG. 2 illustrates a preferred embodiment of the invention, in which the gas to be diluted in the air is injected at the downstream end of a body 10 forming a venturi by three successive nozzles with annular injectors offset from upstream to downstream, respectively 11, 12 and 13, and of increasing section from upstream to downstream.
  • each nozzle will open into the upstream part, open to the atmosphere, of the next nozzle. This will give a considerably increased dilution and air entrainment effect.
  • the injection pressures at each injector may be different and even zero, each pressure being chosen so as to obtain the optimum effect of dilution in air for the injector considered .
  • the invention is not limited to the use of injection nozzles with an annular orifice and any equivalent means can naturally be used.
  • FIG. 3 9 can be used to inject the gas to be diluted in the venturi body 20, a plurality of tubes 21 carried by a plate 22 and supplied by a manifold 23, the discharge orifices 24 being arranged in the upstream part of the body 20 so as to form a crown there.
  • preferably several successive injection means will be used, offset from upstream to downstream and capable of forming the gas sheets of increasing cross section from upstream to downstream.
  • the tubes 25 arranged upstream and carried by the plate 26, will be supplied with gas by the manifold 27 and will preferably open at the downstream end, open to the atmosphere, of a venturi 28, while the downstream tubes 21 will be arranged substantially in the extension of the downstream part of the venturi 27.
  • the side walls of the downstream part of this venturi may advantageously be pierced with additional air inlets 29.
  • a plurality of devices according to the invention arranged in parallel inside a tubular structure forming a venturi 30, open to the atmosphere.
  • Each device will comprise a body 31 forming a venturi, open at its two ends, and at least one injector 32 disposed at the upstream end of said body in order to inject the gas to be diluted therein in the form of a ply with annular section.
  • the supports of the devices and the gas supply means of the injectors 31 have not been shown in the drawing.
  • the invention therefore provides a simple and easy-to-use method and device for producing and diluting in the ambient air a gas or a mixture of gases before they are released to the atmosphere.

Abstract

1. A method of diluting a gas or a mixture of gases with air before discharge to atmosphere, by means of a device comprising a shaped body (20) forming a venturi which is open to the atmosphere at both ends, said gas or mixture of gases being injected under pressure at the upstream end thereof, method characterised in that said gas or mixture of gases is injected into said body in the form of a layer of annular cross-section by means of at least one set of injection tubes (21), the circular orifices (24) of which are arranged in a ring at the upstream part of said body (20) forming a venturi.

Description

La présente invention concerne la dilution dans de l'air d'un gaz ou d'un mélange gazeux, avant son rejet à l'atmosphère.The present invention relates to the dilution in air of a gas or a gaseous mixture, before its rejection to the atmosphere.

Dans de nombreux domaines techniques, il est nécessaire de mélanger intimement deux gaz. C'est en particulier le cas lorsque l'on désire rejeter à l'atmosphère des gaz résiduels dangereux ou combustibles, que l'on doit diluer dans de l'air, avant leur rejet,jusqu'à une concentration suffisamment faible pour que le mélange résultant ne présente plus de danger ou se situe au-dessous du seuil d'inflammabilité du gaz.In many technical fields, it is necessary to thoroughly mix two gases. This is particularly the case when it is desired to reject hazardous or combustible residual gases to the atmosphere, which must be diluted in air, before their discharge, to a concentration low enough for the resulting mixture no longer presents a danger or is below the flammability threshold of the gas.

La présente invention vise à proposer dans ce but un procédé qui soit facile à mettre en oeuvre, même lorsque les quantités de gaz à rejeter sont importantes. Elle vise également à proposer un procédé dont la mise en oeuvre fasse appel à un dispositif simple et d'un entretien facile en cours d'utilisation.The present invention aims to propose for this purpose a method which is easy to implement, even when the quantities of gas to be discharged are significant. It also aims to propose a method, the implementation of which requires a simple device and easy maintenance during use.

A cet effet, l'invention a pour objet un procédé pour la dilution dans de l'air d'un gaz ou d'un mélange gazeux, avant son rejet à l'atmosphère, à l'aide d'un dispositif comprenant un corps profilé formant venturi, ouvert à l'atmosphère à ses deux extrémités et à l'extrémité amont duquel ledit gaz ou mélange gazeux est introduit sous pression à l'aide d'un moyen d'injection, ce procédé étant caractérisé en ce que ledit gaz ou mélange gazeux est injecté dans ledit corps sous la forme d'une nappe à section transversale annulaire.To this end, the subject of the invention is a process for the dilution in air of a gas or of a gaseous mixture, before its rejection into the atmosphere, using a device comprising a body. profile forming a venturi, open to the atmosphere at its two ends and at the upstream end of which said gas or gas mixture is introduced under pressure using an injection means, this process being characterized in that said gas or gas mixture is injected into said body in the form of a sheet with an annular cross section.

Avantageusement, ledit gaz ou mélange gazeux sera injecté dans ledit corps à l'aide d'une pluralité de moyens d'injection décalés d'amont en aval et tels que les nappes successives dudit second gaz produites par lesdits moyens aient des sections transversales croissantes d'amont en aval.Advantageously, said gas or gaseous mixture will be injected into said body using a plurality of injection means offset from upstream to downstream and such that the successive layers of said second gas produced by said means have increasing cross sections d 'upstream downstream.

De préférence, ledit corps formant venturi et le ou lesdits moyens d'injection auront une symétrie de révolution autour d'un même axe.Preferably, said venturi body and said injection means or will have a symmetry of revolution about the same axis.

Ledit moyen d'injection pourra être constitué par un injecteur à orifice annulaire.Said injection means may consist of an injector with an annular orifice.

Il pourra comprendre également un faisceau d'injecteurs dont les orifices circulaires sont disposés en anneau à l'extrémité amont du lit corps formant venturi.It may also include a bundle of injectors whose circular orifices are arranged in a ring at the upstream end of the body bed forming a venturi.

On notera que les dispositifs utilisables pour la mise en oeuvre du procédé selon l'invention sont d'un type général connu en soi (voir,par exemple, FR-A- 1 451 539 ou FR-A- 1 491 215). En revanche, si des dispositifs pour le mélange de deux gaz et leur application au mélange d'air et d'un gaz combustible en vue de l'alimentation de brûleurs ou de tuyères ont été abondamment décrits dans la littérature, l'application de tels dispositifs à la dilution d'un gaz dans de l'air, avant son rejet à l'atmosphère, n'est ni connue, ni suggérée par la technique antérieure.It will be noted that the devices which can be used for implementing the method according to the invention are of a general type known per se (see, for example, FR-A- 1 451 539 or FR-A- 1 491 215). On the other hand, if devices for the mixture of two gases and their application to the mixture of air and a combustible gas for the supply of burners or nozzles have been abundantly described in the literature, the application of such Devices for diluting a gas in air, before it is released to the atmosphere, is neither known nor suggested by the prior art.

Dans la mise en oeuvre de la présente invention, quand le gaz ou les quantitésde gaz à diluer dans de l'air avant leur rejet à l'atmosphère sont très importantes, on utilisera de préférence une pluralité de dispositifs dont les corps formant venturi seront ouverts à leurs deux extrémités et qui seront disposées en parallèle à l'intérieur d'une structure tubulaire communiquant à ses deux extrémités avec l'atmosphère. Outre les mélangea réalisés par les dispositifs élémentaires,on obtiendra un effet additionnel de mélange à l'intérieur de ladite structure tubulaire. Afin d'accroître cet effet, cette structure formera de préférence venturi et lesdits dispositifs seront de préférence disposés à sa partie amont.In the implementation of the present invention, when the gas or the quantities of gas to be diluted in air before they are released to the atmosphere are very large, a plurality of devices will preferably be used, the venturi bodies of which will be open at their two ends and which will be arranged in parallel inside a tubular structure communicating at its two ends with the atmosphere. In addition to the mixing carried out by the elementary devices, an additional mixing effect will be obtained inside said tubular structure. In order to increase this effect, this structure will preferably form a venturi and said devices will preferably be arranged at its upstream part.

Cette combinaison d'une pluralité de dispositifs analogues présente en outre l'avantage qu'il est possible de démonter l'un des dispositifs pour les opérations de maintenance sans immobiliser pour autant l'ensemble de l'appareillage.This combination of a plurality of similar devices also has the advantage that it is possible to dismantle one of the devices for maintenance operations without immobilizing the entire apparatus.

Dans l'application du procédé conforme à l'invention à la dilution dans de l'air de gaz dangereux ou inflammables, on utilisera de préférence plusieurs moyens d'injection décalée d'amont en aval et à section annulaire croissante d'amont en aval, et les pressions d'injection dudit second gaz pourront être différentes au niveau de chaque injecteur et même être nulles, afin d'obtenir l'effet optimum de dilution lors de chaque injection.In the application of the process according to the invention to the dilution in air of dangerous or flammable gases, use will preferably be made of several injection means offset from upstream to downstream and with increasing annular section from upstream to downstream, and the injection pressures of said second gas may be different at each injector and even be zero, in order to obtain the optimum dilution effect during each injection.

Avantageusement, des entrées d'air additionnelles pourront être ménagées latéralement dans la partie aval dudit corps formant venturi, afin d'accroître l'effet de dilution du gaz.Advantageously, additional air inlets can be provided laterally in the downstream part of said venturi body, in order to increase the gas dilution effect.

Lorsque celui-ci comprendra un ou plusieurs gaz combustibles, la dilution dans l'air avant rejet à l'atmosphère devra être telle que l'on se situe en dehors des limites d'inflammabilité pour ses constituants, en particulier pour l'hydrogène et le méthane, que l'on retrouve le plus fréquemment dans les gaz résiduels rejetés à l'atmosphère.When this will include one or more combustible gases, the dilution in the air before rejection to the atmosphere must be such that one is outside the flammability limits for its constituents, in particular for hydrogen and methane, which is most commonly found in residual gases released to the atmosphere.

Les dessins annexés illustrent diverses formes de mise en oeuvre de l'invention,qui seront décrites ci-après. Dans cette description, on se référera à la dilution dans l'air d'un gaz combustible, avant son rejet à l'atmosphère, mais il est clair que l'invention n'est pas limitée à cette application.The accompanying drawings illustrate various forms of implementation of the invention, which will be described below. In this description, reference will be made to the dilution in air of a combustible gas, before its rejection to the atmosphere, but it is clear that the invention is not limited to this application.

Sur les dessins :

  • La figure 1 est une vue schématique en coupe d'un dispositif conforme à l'invention ;
  • La figure 2 est une coupe partielle de la partie amont d'un dispositif comprenant plusieurs injecteurs annulaires décalés;
  • La figure 3 est une coupe partielle analogue à la figure 2 dans laquelle chaque moyen d'injection comprend une pluralité d'injecteurs à orifice circulaire disposés en anneau
  • La figure 4 est une coupe schématique d'un ensemble de plusieurs dispositifs conformes à l'invention, assemblés en parallèle à l'intérieur d'une même structure tubulaire formant venturi.
In the drawings:
  • Figure 1 is a schematic sectional view of a device according to the invention;
  • Figure 2 is a partial section of the upstream part of a device comprising several offset annular injectors;
  • Figure 3 is a partial section similar to Figure 2 in which each injection means comprises a plurality of injectors with circular orifice arranged in a ring
  • Figure 4 is a schematic sectional view of a set of several devices according to the invention, assembled in parallel inside the same tubular structure forming a venturi.

Le dispositif représenté sur la figure 1 comprend un corps formant venturi, qui comporte trois parties essentielles :

  • - une chambre 1 d'entrée d'air, ouverte à l'atmosphère, à profil couvergent, éventuellement tronconique, disposée en amont dans le sens d'écoulement des gaz ;
  • - une chambre cylindrique 2, raccordée à la chambre 1 ;
  • - un divergent 3, prolongeant la chambre 2, de forme tronconique ou s'évasant régulièrement vers l'aval à la manière d'une trompette.
The device represented in FIG. 1 comprises a venturi body, which has three essential parts:
  • - an air inlet chamber 1, open to the atmosphere, with a covering profile, possibly frustoconical, arranged upstream in the direction of flow of the gases;
  • - a cylindrical chamber 2, connected to the chamber 1;
  • - a divergent 3, extending the chamber 2, of frustoconical shape or flaring regularly downstream in the manner of a trumpet.

Le divergent 3 débouche à l'atmosphère, soit directement, soit par l'intermédiaire d'organes annexes non représentés.The divergent 3 opens into the atmosphere, either directly, or by means of non-represented auxiliary members.

L'arrivée du gaz à diluer avant rejet à l'atmosphère s'effectue par une buse à section annulaire 6, coaxiale à la chambre d'entrée d'air 1 et munie d'un injecteur à section annulaire.The gas to be diluted before discharge to the atmosphere is supplied by an annular section nozzle 6, coaxial with the air inlet chamber 1 and provided with an annular section injector.

La buse 6 est percée suivant son axe d'un conduit 8, ouvert à ses deux extrémités et qui communique avec l'atmosphère par son extrémité aval. Ce conduit 8 forme une seconde entrée d'air, qui s'ajoute à celle définie par les parois externes de la buse 6 et les parois internes de la chambre 1.The nozzle 6 is pierced along its axis with a conduit 8, open at its two ends and which communicates with the atmosphere through its downstream end. This duct 8 forms a second air inlet, which is added to that defined by the external walls of the nozzle 6 and the internal walls of the chamber 1.

La dilution dans l'air s'effectue par entraînement de l'air par le gaz à diluer, qui sert d'agent moteur, ce gaz étant injecté sous pression, sous forme d'une nappe cylindrique ou conique, en contact avec l'air aussi bien par sa partie externe que sa partie interne, une diffusion et un mélange avec l'air se produisant très rapidement, avec un minimum de perte de charge au contact des parois. L'échange d'énergie entre les deux flux gazeux, le flux moteur de gaz à diluer, d'une part, et le flux d'air induit, d'autre part, d'abord dans la chambre 2, puis dans le divergent 3, conduit à un mélange homogène à l'extrémité aval du divergent.The dilution in the air is carried out by entrainment of the air by the gas to be diluted, which acts as a driving agent, this gas being injected under pressure, in the form of a cylindrical or conical sheet, in contact with the air both by its external part and its internal part, diffusion and mixing with the air occurring very quickly, with a minimum pressure drop in contact with the walls. The energy exchange between the two gas flows, the motor flow of gas to be diluted, on the one hand, and the induced air flow, on the other hand, first in chamber 2, then in the divergent 3, leads to a homogeneous mixture at the downstream end of the divergent.

Avantageusement, comme représenté, le divergent 3 sera percé latéralement d'orifices 4, à proximité de son extrémité aval, afin d'accroître le taux de dilution du gaz dans l'air.Advantageously, as shown, the divergent 3 will be pierced laterally with orifices 4, near its downstream end, in order to increase the rate of dilution of the gas in the air.

La figure 2 illustre une forme de mise en oeuvre préférée de l'invention, dans laquelle le gaz à diluer dans l'air est injecté à l'extrémité aval d'un corps 10 formant venturi par trois buses successives à injecteurs annulaires décalés d'amont en aval, respectivement 11, 12 et 13, et de section croissante d'amont en aval. De préférence, comme représenté, chaque buse débouchera dans la partie amont, ouverte à l'atmosphère, de la buse suivante. On obtiendra ainsi un effet de dilution et d'entraînement d'air considérablement accru.FIG. 2 illustrates a preferred embodiment of the invention, in which the gas to be diluted in the air is injected at the downstream end of a body 10 forming a venturi by three successive nozzles with annular injectors offset from upstream to downstream, respectively 11, 12 and 13, and of increasing section from upstream to downstream. Preferably, as shown, each nozzle will open into the upstream part, open to the atmosphere, of the next nozzle. This will give a considerably increased dilution and air entrainment effect.

Comme indiqué ci-dessus, dans ce cas, les pressions d'injection au niveau de chaque injecteur pourront être différentes et même nulles, chaque pression étant choisie de façon à obtenir l'effet optimum de dilution dans l'air pour l'injecteur considéré.As indicated above, in this case, the injection pressures at each injector may be different and even zero, each pressure being chosen so as to obtain the optimum effect of dilution in air for the injector considered .

L'invention n'est pas limitée à l'emploi de buses d'injection à orifice annulaire et l'on peut naturellement utiliser tout moyen équivalent.The invention is not limited to the use of injection nozzles with an annular orifice and any equivalent means can naturally be used.

Cest ainsi que, comme représenté sur la figure 39 on peut utiliser, pour injecter le gaz à diluer dans le corps formant venturi 20, une pluralité de tubes 21 portés par une platine 22 et alimentés par un collecteur 23, les orifices d'évacuation 24 étant disposés dans la partie amont du corps 20 de manière à y former une couronne.Thus, as shown in Figure 3 9 can be used to inject the gas to be diluted in the venturi body 20, a plurality of tubes 21 carried by a plate 22 and supplied by a manifold 23, the discharge orifices 24 being arranged in the upstream part of the body 20 so as to form a crown there.

Dans ce cas également, comme représenté, on utilisera de préférence plusieurs moyens successifs d'injection décalés d'amont en aval et aptes à former les napppes de gaz de section croissante d'amont en aval. Les tubes 25 disposés en amont et portés par la platine 26, seront alimentés en gaz par le collecteur 27 et déboucheront de préférence à l'extrémité aval, ouverte à l'atmosphère,d'un venturi 28, tandis que les tubes aval 21 seront disposés sensiblement dans le prolongement de la partie aval du venturi 27. Les parois latérales de la partie aval de ce venturi pourront être avantageusement percées d'entrées d'air additionnelles 29.In this case also, as shown, preferably several successive injection means will be used, offset from upstream to downstream and capable of forming the gas sheets of increasing cross section from upstream to downstream. The tubes 25 arranged upstream and carried by the plate 26, will be supplied with gas by the manifold 27 and will preferably open at the downstream end, open to the atmosphere, of a venturi 28, while the downstream tubes 21 will be arranged substantially in the extension of the downstream part of the venturi 27. The side walls of the downstream part of this venturi may advantageously be pierced with additional air inlets 29.

Dans le cas où l'on désire diluer dans l'air de très importantes quantités de gaz, avant leur rejet à l'atmosphères on utilisera avantageusement, comme représenté schématiquement sur la figure 4, une pluralité de dispositifs conformes à l'invention disposés en parallèle à l'intérieur d'une structure tubulaire formant venturi 30, ouverte à l'atmosphère. Chaque dispositif comprendra un corps 31 formant venturi, ouvert à ses deux extrémités, et au moins un injecteur 32 disposé à l'extrémité amont dudit corps en vue d'y injecter le gaz à diluer sous forme d'une nappe à section annulaire. Pour plus de simplicité, les supports des dispositifs et les moyens d'alimentation en gaz des injecteurs 31 n'ont pas été représentés sur le dessin.In the case where it is desired to dilute very large quantities of gas in the air, before their rejection to the atmospheres, advantageously, as shown schematically in Figure 4, a plurality of devices according to the invention arranged in parallel inside a tubular structure forming a venturi 30, open to the atmosphere. Each device will comprise a body 31 forming a venturi, open at its two ends, and at least one injector 32 disposed at the upstream end of said body in order to inject the gas to be diluted therein in the form of a ply with annular section. For simplicity, the supports of the devices and the gas supply means of the injectors 31 have not been shown in the drawing.

Avec un tel ensemble, qui constitue un autre objet de la présente invention, de l'air additionnel est induit dans la structure tubulaire 30 et l'on obtient un effet accru de dilution du gaz dans l'air. En outre, il est possible de démonter individuellement chacun des dispositifs élémentaires en vue de l'entretenir ou de le réparer, sans interrompre le fonctionnement de l'ensemble pendant une durée supérieure à celle du démontage.With such an assembly, which constitutes another object of the present invention, additional air is induced in the tubular structure 30 and an increased effect of dilution of the gas in the air is obtained. In addition, it is possible to dismantle each of the elementary devices individually in order to maintain or repair it, without interrupting the operation of the assembly for a period greater than that of dismantling.

L'invention apporte donc un procédé et un dispositif simples et faciles à mettre en oeuvre pour réaliser et pour diluer dans l'air ambiant un gaz ou un mélange de gaz avant sont rejet à l'atmosphère.The invention therefore provides a simple and easy-to-use method and device for producing and diluting in the ambient air a gas or a mixture of gases before they are released to the atmosphere.

Claims (9)

1.- Procédé de dilution dans de l'air d'un gaz ou d'un mélange gazeux, avant son rejet à l'atmosphère, à l'aide d'un dispositif comprenant un corps profilé formant venturi (1, 2, 3),ouvert à l'atmosphère à ses deux extrémités et à l'extrémité amont duquel ledit gaz ou mélange gazeux est injecté sous pression à l'aide d'un moyen (6),procédé caractérisé en ce que ledit gaz ou mélange gazeux est injecté dans ledit corps sous la forme d'une nappe à section transversale annulaire.1.- A method of diluting a gas or a gaseous mixture in air, before its rejection into the atmosphere, using a device comprising a profiled body forming a venturi (1, 2, 3 ), open to the atmosphere at its two ends and at the upstream end of which said gas or gas mixture is injected under pressure using a means (6), process characterized in that said gas or gas mixture is injected into said body in the form of a ply with an annular cross section. 2.- Procédé selon la revendication 1, caractérisé en ce que ledit gaz ou mélange gazeux est injecté dans ledit corps à l'aide d'une pluralité de moyens d'injection (11, 12, 13) décalés d'amont en aval et tels que les nappes successives dudit gaz ou mélange gazeux produits par lesdits moyens aient des sections transversales croissantes d'amont en aval.2.- Method according to claim 1, characterized in that said gas or gas mixture is injected into said body using a plurality of injection means (11, 12, 13) offset from upstream to downstream and such that the successive layers of said gas or gas mixture produced by said means have increasing cross sections from upstream to downstream. 3.- Procédé selon l'une des revendications 1 et 2, caractérisé en ce que ledit corps (1, 2, 3; 10) et le ou lesdits moyens d'injection (6 ; 11, 12, 13) ont une symétrie de révolution autour d'un même axe.3.- Method according to one of claims 1 and 2, characterized in that said body (1, 2, 3; 10) and said injection means or (6; 11, 12, 13) have a symmetry of revolution around the same axis. 4.- Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le ou lesdits moyens d'injection (6 ; 11, 12, 13)comprennent un injecteur annulaire.4.- Method according to one of claims 1 to 3, characterized in that the said injection means (6; 11, 12, 13) comprise an annular injector. 5.- Procédé selon l'une des revendications 2 et 4 en combinaison, caractérisé en ce que lesdits moyens d'injection comprennent un conduit central ouvert à ses deux extrémités, dans la partie amont duquel débouche l'injecteur annulaire du moyen d'injection disposé immédiatement en amont.5.- Method according to one of claims 2 and 4 in combination, characterized in that said injection means comprise a central duct open at its two ends, in the upstream part which opens the annular injector of the injection means arranged immediately upstream. 6.- Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le ou lesdits moyens d'injection comprennent une pluralité de tubes (21) dont les orifices circulaires (24) sont disposés en couronne à la partie aval dudit corps (20) formant venturi.6.- Method according to one of claims 1 to 3, characterized in that the said injection means or comprise a plurality of tubes (21) whose circular orifices (24) are arranged in a ring at the downstream part of said body (20) forming a venturi. 7.- Procédé selon les revendications 2 et 6 en combinaison, caractérisé en ce que chaque moyen d'injection débouche dans la partie amont d'une structure tubulaire (28) formant venturi et en ce que les conduits (21) des moyens d'injection disposés en aval de cette structure tubulaire (28) sont sensiblement dans le prolongement de celle-ci.7.- Method according to claims 2 and 6 in combination, characterized in that each injection means opens into the upstream part of a tubular structure (28) forming a venturi and in that the conduits (21) of the injection means disposed downstream of this tubular structure (28) are substantially in the extension thereof. 8.- Procédé selon l'une des revendications 1 à 7, caractérisé en ce que ledit gaz ou mélange gazeux est injecté simultanément à l'extrémité amont de venturis ouverts à leurs extrémités d'une pluralité de dispositifs disposés en parallèle,caractérisé en ce que lesdits venturis sont disposés à l'intérieur d'une structure tubulaire (30) ouverte à l'atmosphère à ses deux extrémités et formant de préférence venturi.8.- Method according to one of claims 1 to 7, characterized in that said gas or gas mixture is injected simultaneously at the upstream end of venturis open at their ends of a plurality of devices arranged in parallel, characterized in that that said venturis are arranged inside a tubular structure (30) open to the atmosphere at its two ends and preferably forming a venturi. 9.- Procédé selon l'une des revendications 1 à 8, appliqué à un gaz inflammable, caractérisé en ce que la dilution dans l'air dudit gaz au niveau de chaque moyen d'injection est telle que la teneur du mélange gazeux résultant en gaz combustible (s) se situe au-dessous du seuil d'inflammabilité du ou desdits gaz combustibles.9.- Method according to one of claims 1 to 8, applied to a flammable gas, characterized in that the dilution in air of said gas at each injection means is such that the content of the gaseous mixture resulting in combustible gas (s) is below the flammability threshold of said combustible gas (s).
EP85400050A 1984-01-13 1985-01-11 Method for diluting a gas, or mixture of gases, with air before discharge to atmosphere Expired EP0149574B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400050T ATE30518T1 (en) 1984-01-13 1985-01-11 PROCESS FOR DILUTING A GAS OR GAS MIXTURE IN AIR FROM ITS DISCHARGING TO THE ATMOSPHERE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8400525 1984-01-13
FR8400525A FR2558071A1 (en) 1984-01-13 1984-01-13 METHOD AND DEVICE FOR MIXING AT LEAST TWO GASES AND APPLICATION TO THE DILUTION IN THE AIR OF A GAS BEFORE REJECTING IT TO THE ATMOSPHERE

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EP0149574A2 true EP0149574A2 (en) 1985-07-24
EP0149574A3 EP0149574A3 (en) 1985-09-11
EP0149574B1 EP0149574B1 (en) 1987-11-04

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EP85400050A Expired EP0149574B1 (en) 1984-01-13 1985-01-11 Method for diluting a gas, or mixture of gases, with air before discharge to atmosphere

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EP (1) EP0149574B1 (en)
AT (1) ATE30518T1 (en)
DE (1) DE3560859D1 (en)
FR (1) FR2558071A1 (en)
NO (1) NO850110L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000074831A1 (en) * 1999-06-09 2000-12-14 Aeroflo (Proprietary) Limited Method and device for mixing gases
CN108518682A (en) * 2018-05-04 2018-09-11 中国石油集团川庆钻探工程技术有限公司钻采工程技术研究院 Reduce the Venturi tube and burner of noise

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3014505A1 (en) 2013-12-06 2015-06-12 Acri In DEVICE FOR OPTIMIZING THE VALORIZATION OF THE MOTION QUANTITY OF A FLUID JET FOR THE PROPULSION OR DRIVE OF THE RECEPTOR FLUID OR THE MIXTURE OF BOTH FLUIDS
US20150174360A1 (en) * 2013-12-23 2015-06-25 12th Man Technologies, Inc. Device for Discharging Toxic Gases
DE102017217248A1 (en) * 2017-09-27 2019-03-28 Robert Bosch Gmbh Fuel-air mixing device and a heater

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1451539A (en) * 1965-07-22 1966-01-07 Bertin & Cie Improvements to devices with a nozzle in the form of a thin slot, for gaseous fluids
GB1024870A (en) * 1962-12-17 1966-04-06 Abbott Lab Device for circulating and turbulently intermixing a fluid with a liquid
FR1491215A (en) * 1965-09-21 1967-08-11 Bertin & Cie Improvements to ejectors-mixers or tubes
US4149453A (en) * 1977-04-19 1979-04-17 John Zink Company No-plume device
GB1582898A (en) * 1977-07-25 1981-01-14 Kamelmacher E Jet pump or mixer and jet means therefor
FR2530317A1 (en) * 1982-07-15 1984-01-20 Raffinage Cie Francaise METHOD AND DEVICE FOR THE COMBUSTION OF COMBUSTIBLE GASES WITH INDUCTION OF ATMOSPHERIC AIR

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1024870A (en) * 1962-12-17 1966-04-06 Abbott Lab Device for circulating and turbulently intermixing a fluid with a liquid
FR1451539A (en) * 1965-07-22 1966-01-07 Bertin & Cie Improvements to devices with a nozzle in the form of a thin slot, for gaseous fluids
FR1491215A (en) * 1965-09-21 1967-08-11 Bertin & Cie Improvements to ejectors-mixers or tubes
US4149453A (en) * 1977-04-19 1979-04-17 John Zink Company No-plume device
GB1582898A (en) * 1977-07-25 1981-01-14 Kamelmacher E Jet pump or mixer and jet means therefor
FR2530317A1 (en) * 1982-07-15 1984-01-20 Raffinage Cie Francaise METHOD AND DEVICE FOR THE COMBUSTION OF COMBUSTIBLE GASES WITH INDUCTION OF ATMOSPHERIC AIR
EP0099828A2 (en) * 1982-07-15 1984-02-01 Compagnie De Raffinage Et De Distribution Total France Apparatus for the combustion of combustible fluids with air induction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000074831A1 (en) * 1999-06-09 2000-12-14 Aeroflo (Proprietary) Limited Method and device for mixing gases
CN108518682A (en) * 2018-05-04 2018-09-11 中国石油集团川庆钻探工程技术有限公司钻采工程技术研究院 Reduce the Venturi tube and burner of noise

Also Published As

Publication number Publication date
EP0149574B1 (en) 1987-11-04
FR2558071A1 (en) 1985-07-19
EP0149574A3 (en) 1985-09-11
NO850110L (en) 1985-07-15
ATE30518T1 (en) 1987-11-15
DE3560859D1 (en) 1987-12-10

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