EP2016994A2 - Mixer for gaseous media and method for mixing gaseous media - Google Patents
Mixer for gaseous media and method for mixing gaseous media Download PDFInfo
- Publication number
- EP2016994A2 EP2016994A2 EP08012921A EP08012921A EP2016994A2 EP 2016994 A2 EP2016994 A2 EP 2016994A2 EP 08012921 A EP08012921 A EP 08012921A EP 08012921 A EP08012921 A EP 08012921A EP 2016994 A2 EP2016994 A2 EP 2016994A2
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- European Patent Office
- Prior art keywords
- gas
- openings
- control
- mixer
- control sleeve
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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
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
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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
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
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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
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
- B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
Definitions
- the invention relates to a mixer for gaseous media with a Venturi tube, through which a gas flows in the tube axis direction and in the region of which a narrowed cross-section are provided on the tube wall inlet openings for admixed gas and a method using the mixer.
- Characteristics of the mixer for gaseous media with a Venturi tube through which a gas flows in the tube direction and in the region of reduced cross-section at the pipe wall inlet openings are provided for admixing gas is that the inlet openings have a variable passage cross-section which during operation during of the mixing process by means of control elements are changeable. With the variability of the passage cross-sections for the admixed gas during operation, a constant fine adjustment of the gas admixture is achieved. This is very important for smooth running and efficient use of energy.
- the passage cross sections of the inlet openings during operation during the mixing process by means of the control elements are continuously changed according to regulation specifications. With continuous adjustment, the mixer can respond sensitively and quickly to compositional changes of the resource (s) during operation.
- the region of the Venturi tube with a narrowed cross-section, in which the inlet openings are located, is adjustable with respect to the venturi-adjustable control members, by means of which the passage cross sections of the inlet openings are variable during an adjustment.
- the control members include at least one, the narrowed cross-section comprehensive control sleeve which is provided with fuel flow openings, wherein in a mutual adjustment of the fuel control openings and the inlet openings, the size of the passage cross sections is variable.
- control sleeve is adjustable by means of a control mechanism.
- control sleeve is connected to the control mechanism via a thrust strip, which adjusts the control sleeve according to the specifications of the control mechanism, preferably a flexible to spring-stiff push strip, whereby the passage cross sections are variable.
- the thrust strip preferably has a certain rigidity. It is supported on the outer housing wall. This has the advantage that the friction on the control sleeve remains almost constant and is not dependent on biasing. A thermal expansion in the housing does not lead to an increase in the friction in the control sleeve, but has only an effect on the angle of rotation of the control sleeve.
- the thrust strip is attached to a roller of the control mechanism on the one hand and on the control sleeve on the other hand, and that the control sleeve on the narrowed cross-section of the Venturi tube according to the adjustment of the control mechanism of the roller on the thrust plate rotatable is.
- control sleeve is connected to the control mechanism via a rigid push rod, which adjusts the control sleeve according to the specifications of the control mechanism and thus the passage cross sections are variable.
- control sleeve is provided with a ring gear, via which a pinion operated by the control mechanism drives a toothed belt with which the control sleeve on the narrowed cross section of the Venturi tube is rotatable according to the specifications of the control mechanism and so that the passage cross sections are changeable.
- the rigid push rod or the ring gear are provided.
- a window is provided in the mixer housing, through which the position of the actuators can be observed.
- a gas displacement body e.g. in the form of a Zeppelins, if necessary exchangeable, is arranged.
- the interchangeability is used for rapid adaptation of the cross-section of the constricted Venturi tube, with which an adaptation to any operating conditions is achieved.
- the gas displacement body is preferably hollow on the side in the flow shadow and there has a corresponding outlet opening for the gas.
- At least two gas supply lines are provided for admixing gas.
- the (at least) two gas connections enable the supply of different gases.
- control sleeve must fit as accurately as possible on the Venturi tube; However, it must not become stiff due to soiling or thermal expansion. According to a particular embodiment of the invention, it is provided that the control sleeve consists of a dimensionally stable and self-lubricating material.
- the dimensionally stable and self-lubricating material of the control sleeve contains stabilizing and lubricating components.
- the material of the control sleeve is made of plastic, in particular of a plastic lubricated with a solid lubricant.
- a suitable material is for example Murylat SP® (PETP-SP).
- the working method used for mixing the gases uses a mixer with a Venturi tube through which a gas flows in the tube direction and in the region of reduced cross-section flows through admixed by inlet openings provided on the tube wall, wherein the passage cross sections of the inlet openings are changed to adapt the composition of a mixed gas to be supplied to a consumer to the needs.
- the passage cross sections of the inlet openings are continuously changed in the operation for the mixing process as needed to continuously adapt the composition of a mixed gas to be supplied to a consumer needs.
- Fig. 1 shows a mixer for gaseous media, which are supplied to a consumer, for example, an internal combustion engine.
- the mixer 1 consists of a housing 2, in which a Venturi tube 3 is located. Through the inlet 4 of the Venturi tube 3 air is sucked into the engine downstream located.
- the Venturi tube 3 is arranged in a mixer housing 2, which serves to guide the gas.
- a fuel gas supply 5 It is a fuel gas supply 5 to recognize.
- a control mechanism 6 for a later explained regulating sleeve, which makes the supply of the fuel gas controllable.
- the tube region 7 of the Venturi tube 3 with a narrowed cross section is provided with inlet openings 8 for the fuel gas in the tube region 7.
- a zeppelin-shaped gas displacement body 10 is arranged along the axis of the Venturi tube 3 by means of struts 9.
- Fig. 2 shows the core region of the mixer 1 and that the Venturi tube 3 with the conically tapered inlet, the narrowed tube portion 7 and the conically widening outlet 12.
- the inlet openings 8 can be seen.
- the Venturi tube 3 can be inserted into the mixer housing.
- the pipe portion 7 is comprised of a control sleeve 14, which in Fig. 3 in side view and in Fig. 4 is shown as a single part.
- the control sleeve 14 consists of a dimensionally stable and self-lubricating material. It is possible that the dimensionally stable and self-lubricating material of the control sleeve contains stabilizing and lubricating components.
- the control sleeve may be made of metal, ceramic, plastic or a composite material.
- the material should meet the requirements of being dimensionally stable and self-lubricating.
- An example of a suitable material is Murylat SP®.
- Such a dimensionally stable and self-lubricating material is for example a plastic.
- the control sleeve 14 is provided with fuel gas control openings 15.
- the openings 8 and 15 correspond to each other, but they do not have to.
- the control sleeve 14 has a collar 16 on which a flexible to feather-resistant push strip 17 is attached.
- the push rod may, for example, have a rigidity on the order of a cable tie.
- the other end of the push strip 17 is attached to a roller 18.
- the roller 18 is seated on a shaft 19 of the control mechanism 6. Rotational movements of the shaft 19 are transmitted to the thrust strip 17, whereby also the control sleeve 14 is rotated, adjusted.
- the thrust strip 17 applies when pushed against the wall 20 or a similar kind of guide element and is supported on the wall or the guide element.
- a variant of the pushing operation of the control sleeve 14 is shown.
- a rigid push rod 22 is used, which adjusts the control sleeve 14.
- the push rod 22 is hinged to the roller 18 and the control sleeve 14, for example by means of ball joints 23.
- Fig. 7 shows a drive for rotating the control sleeve 14 by means of a toothed belt 24.
- the control sleeve 14 is for this purpose with a sprocket 25 (FIG. FIGS. 9 and 10 ) Mistake.
- the toothed belt 24 is moved by a pinion 26 and rotated about the ring gear, the control sleeve 14.
- the pinion 26 is driven by the control mechanism 6 according to specifications of the control device, not shown.
- Fig. 8 is a two-part embodiment of the control sleeve 14 is shown in exploded view.
- the two parts 14a and 14b are put together on the pipe section 7.
- the change in the passage cross sections 21 during rotation of the control sleeve 14 behaves as in the case of the slide strips 17 and push rods 22, by the inlet openings 8 and the fuel control openings 15 move against each other.
- the blending of the fuel gas can be adjusted continuously to the requirements.
- FIGS. 9 and 10 a one-piece control sleeve 14 is shown with sprocket 25 and other forms of fuel regulating openings 15.
- the shape and size of the fuel regulator openings and inlet openings 8 depends on the flow rates.
- the openings 8 and 15 are elongated.
- the ring gear 25 is arranged in a multi-row arrangement of the inlet openings 8 on the Venturi tube and the fuel regulating openings 15 on the control sleeve 14 between the openings.
- Fig. 9 shows the control sleeve 14 alone. In Fig. 10 it is pushed over the narrowed tube portion 7 of the Venturi tube 3. It can also be seen how the passage cross sections 21 between the inlet openings 8 and the fuel regulating openings 15 remain free.
- the collar 16 and the sprocket 25 can in all variants of the control sleeve 14 on a sleeve side as in Fig. 4 or in the middle between the fuel regulating openings 15 as in FIG FIGS. 9 and 10 be provided. It is also possible to place the fuel regulating openings at the sleeve edges, wherein they may be open to the flanks of the regulating sleeves.
- Fig. 11 shows a mixer 1 with two nozzles 5 for the supply of different fuel gases.
- the channel 7 of the Venturi tube 3 it can be seen how the zeppelin-shaped body 10 extending along the axis of the Venturi tube 3 is suspended on the struts 9.
- the struts 9 may be hollow to be aligned continuously with the openings 8 for the purposes of gas transport, and in this case in turn have openings 30, preferably on both sides of the / each strut, in particular in the rear part of the strut (with respect to the flow direction) and / or expiring in the body 10 at the end.
- Fig. 12 shows how the mixer housing 2, a window 27 is provided through which can be observed, which position the control sleeve 14 at the moment of inspection has. It can be seen a reference line 28 on the mixer housing 2 and a bar code 29 on the control sleeve 14. In this way, an optical control of the size of the passage cross-sections is possible.
- Fig. 13 shows a longitudinal section through the Venturi tube 3. Based on the longitudinal section can be seen zeppelin-shaped body in the channel 7. The zeppelin-shaped body is interchangeable. Thus, the passage cross section of the channel is variable. However, this variation is more static, since an exchange is not possible during operation. It is therefore an option to make before the start of operation.
- Fig. 14 shows a longitudinal section through a hollow Gasverdritzungsharm 10 in Zeppelin form. Also shown are the inner end surfaces of the hollowed drop-shaped struts 9 which secure the gas displacement body in the Venturi tube and through which fuel gas is directed into the hollow interior of the gas displacement body. Through the outlet openings 31 in the gas displacement body on the outer lateral surface beyond the two end faces, the gas / fuel gas (possibly proportionately) is introduced into the inner region of the Venturi tube.
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Abstract
Description
Die Erfindung bezieht sich auf einen Mischer für gasförmige Medien mit einem Venturi-Rohr, durch das in Rohrachsrichtung ein Gas strömt und in dessen Bereich mit verengtem Querschnitt an der Rohrwand Eintrittsöffnungen für beizumischendes Gas vorgesehen sind und ein Verfahren unter Einsatz des Mischers.The invention relates to a mixer for gaseous media with a Venturi tube, through which a gas flows in the tube axis direction and in the region of which a narrowed cross-section are provided on the tube wall inlet openings for admixed gas and a method using the mixer.
Bei dem Betrieb von Gasmotoren besteht das Problem, dass die Zusammensetzung der angelieferten Gase Schwankungen unterworfen ist. Diese Schwankungen sind ganz erheblich. Einige Betreiber von Gasmotoren könnten die Effizienz ihrer Anlagen erheblich steigern, wenn sie standardmäßig zwei Gasqualitäten, z.B. Biogas und Erdgas im Wechsel oder gleichzeitig für den Betrieb vorsehen. Ein weiteres Problem ist, dass die Gase unerwünschte Beimengungen enthalten, die im Mischer störende Ablagerungen hervorrufen. Solche Beimengungen sind beispielsweise Schwefel und Wasser.In the operation of gas engines there is the problem that the composition of the supplied gases is subject to fluctuations. These fluctuations are quite significant. Some operators of gas engines could significantly increase the efficiency of their plants if they use two standard gas qualities, e.g. Provide biogas and natural gas alternately or at the same time for operation. Another problem is that the gases contain unwanted admixtures, which cause disturbing deposits in the mixer. Such admixtures are, for example, sulfur and water.
Es ist Aufgabe der Erfindung, einen Mischer zu schaffen, der den Schwankungen der Zusammensetzungen während des Betriebes Rechnung trägt und bei dem Betriebsstörungen durch Verschmutzungen vermieden werden. Weiterhin soll die gleichzeitige oder wechselnde Nutzung verschiedener Gasqualitäten ermöglicht werden. Die gestellte Aufgabe ist erfindungsgemäß gelöst mit einem Mischer für gasförmige Medien gemäß Anspruch 1. Bevorzugte Ausführungsformen sind Gegenstand der Unteransprüche oder nachfolgend beschrieben.It is an object of the invention to provide a mixer, which takes into account the variations of the compositions during operation and are avoided in the malfunction due to contamination. Furthermore, the simultaneous or alternate use of different gas qualities is to be made possible. The object is achieved according to the invention with a mixer for gaseous media according to
Kennzeichen des Mischers für gasförmige Medien mit einem Venturi-Rohr, durch das in Rohrachsrichtung ein Gas strömt und in dessen Bereich mit verengtem Querschnitt an der Rohrwand Eintrittsöffnungen für beizumischendes Gas vorgesehen sind, ist, dass die Eintrittsöffnungen einen veränderbaren Durchlassquerschnitt aufweisen, die im Betrieb während des Mischungsvorganges mittels Regelgliedern veränderbar sind. Mit der Veränderbarkeit der Durchlassquerschnitte für das beizumischende Gas während des Betriebes wird eine ständige Feinanpassung der Gasbeimischung erreicht. Dies ist für einen ruhigen Lauf und für eine effiziente Energieausnutzung von großer Bedeutung.Characteristics of the mixer for gaseous media with a Venturi tube through which a gas flows in the tube direction and in the region of reduced cross-section at the pipe wall inlet openings are provided for admixing gas is that the inlet openings have a variable passage cross-section which during operation during of the mixing process by means of control elements are changeable. With the variability of the passage cross-sections for the admixed gas during operation, a constant fine adjustment of the gas admixture is achieved. This is very important for smooth running and efficient use of energy.
Es ist vorgesehen, dass die Durchlassquerschnitte der Eintrittsöffnungen im Betrieb während des Mischungsvorganges mittels der Regelglieder entsprechend Regelvorgaben kontinuierlich veränderbar sind. Mit der kontinuierlichen Anpassung kann der Mischer feinfühlig und rasch auf Zusammensetzungsänderungen des/der Betriebsmittel während des Betriebes reagieren.It is envisaged that the passage cross sections of the inlet openings during operation during the mixing process by means of the control elements are continuously changed according to regulation specifications. With continuous adjustment, the mixer can respond sensitively and quickly to compositional changes of the resource (s) during operation.
Der Bereich des Venturi-Rohres mit verengtem Querschnitt, in dem sich die Eintrittsöffnungen befinden, ist von gegenüber dem Venturi-Rohr verstellbaren Regelgliedern, umfasst mittels der bei einer Verstellung die Durchlassquerschnitte die Eintrittsöffnungen veränderbar sind. Zu den Regelgliedern gehört wenigstens eine, den verengten Querschnitt umfassende Regelhülse, die mit Brennstoffregelöffnungen versehen ist, wobei bei einem gegeneinander Verstellen der Brennstoffregelöffnungen und der Eintrittsöffnungen die Größe der Durchlassquerschnitte veränderbar ist.The region of the Venturi tube with a narrowed cross-section, in which the inlet openings are located, is adjustable with respect to the venturi-adjustable control members, by means of which the passage cross sections of the inlet openings are variable during an adjustment. The control members include at least one, the narrowed cross-section comprehensive control sleeve which is provided with fuel flow openings, wherein in a mutual adjustment of the fuel control openings and the inlet openings, the size of the passage cross sections is variable.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die Regelhülse mittels eines Regelmechanismus verstellbar ist.According to a further embodiment of the invention it is provided that the control sleeve is adjustable by means of a control mechanism.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die Regelhülse mit dem Regelmechanismus über einen Schubstreifen verbunden ist, der die Regelhülse nach den Vorgaben des Regelmechanismus verstellt, vorzugsweise einem flexiblen bis federsteifen Schubstreifen, wodurch die Durchlassquerschnitte veränderbar sind. Der Schubstreifen weist vorzugsweise eine gewisse Steifigkeit auf. Er stützt sich an der äußeren Gehäusewand ab. Dies hat den Vorteil, dass die Reibung an der Regelhülse nahezu konstant bleibt und nicht von Vorspannungen abhängig ist. Eine thermische Ausdehnung im Gehäuse führt nicht zu einer Erhöhung der Reibung in der Regelhülse, sondern hat nur Einfluss auf den Drehwinkel der Regelhülse.According to a further embodiment of the invention, it is provided that the control sleeve is connected to the control mechanism via a thrust strip, which adjusts the control sleeve according to the specifications of the control mechanism, preferably a flexible to spring-stiff push strip, whereby the passage cross sections are variable. The thrust strip preferably has a certain rigidity. It is supported on the outer housing wall. This has the advantage that the friction on the control sleeve remains almost constant and is not dependent on biasing. A thermal expansion in the housing does not lead to an increase in the friction in the control sleeve, but has only an effect on the angle of rotation of the control sleeve.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass der Schubstreifen an einer Rolle des Regelmechanismus einerseits und an der Regelhülse andererseits befestigt ist, und dass die Regelhülse auf dem verengten Querschnitt des Venturi-Rohres entsprechend der Verstellvorgabe des Regelmechanismus von der Rolle über den Schubstreifen verdrehbar ist.According to a further embodiment of the invention, it is provided that the thrust strip is attached to a roller of the control mechanism on the one hand and on the control sleeve on the other hand, and that the control sleeve on the narrowed cross-section of the Venturi tube according to the adjustment of the control mechanism of the roller on the thrust plate rotatable is.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die Regelhülse mit dem Regelmechanismus über eine steife Schubstange verbunden ist, die die Regelhülse nach den Vorgaben des Regelmechanismus verstellt und damit die Durchlassquerschnitte veränderbar sind.According to a further embodiment of the invention it is provided that the control sleeve is connected to the control mechanism via a rigid push rod, which adjusts the control sleeve according to the specifications of the control mechanism and thus the passage cross sections are variable.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die steife Schubstange an dem Übertragungsmittel des Regelmechanismus einerseits und an der Regelhülse andererseits gelenkig angelenkt ist, und dass die Regelhülse auf dem verengten Querschnitt des Venturi-Rohres entsprechend der Verstellvorgabe des Regelmechanismus vom Übertragungsmittel über den Schubstreifen verdrehbar ist.According to a further embodiment of the invention, it is provided that the rigid push rod on the transfer means of the control mechanism on the one hand and on the control sleeve on the other hand hinged articulated, and that the control sleeve on the narrowed cross-section of the Venturi tube according to the adjustment of the control mechanism from the transmission means on the slide strip is rotatable.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die Regelhülse mit einem Zahnkranz versehen ist, über den ein von dem Regelmechanismus bedienbares Ritzel einen Zahnriemen antreibt, mit dem entsprechend den Vorgaben des Regelmechanismus die Regelhülse auf dem verengten Querschnitt des Venturi-Rohres verdrehbar ist und damit die Durchlassquerschnitte veränderbar sind.According to a further embodiment of the invention, it is provided that the control sleeve is provided with a ring gear, via which a pinion operated by the control mechanism drives a toothed belt with which the control sleeve on the narrowed cross section of the Venturi tube is rotatable according to the specifications of the control mechanism and so that the passage cross sections are changeable.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass bei einer mehrreihigen Anordnung der Eintrittsöffnungen am Venturi-Rohr die Brennstoffregelöffnungen der Regelhülse beiderseits des Angriffsbereiches des flexiblen bis federsteifen Schubstreifens, der steifen Schubstange oder des Zahnkranzes vorgesehen sind.According to a further embodiment of the invention, it is provided that in a multi-row arrangement of the inlet openings on the Venturi tube fuel flow openings of the control sleeve on both sides of the attack area of the flexible to spring-rigid push strip, the rigid push rod or the ring gear are provided.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass im Mischergehäuse ein Fenster vorgesehen ist, durch das die Stellung der Stellglieder beobachtbar ist.According to a further embodiment of the invention, it is provided that a window is provided in the mixer housing, through which the position of the actuators can be observed.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass längs der Achse des Venturi-Rohres ein Gasverdrängungskörper, z.B. in der Form eines Zeppelins, ggf. austauschbar, angeordnet ist. Die Austauschbarkeit dient der schnellen Anpassung des Querschnittes des verengten Venturi Rohres, mit der eine Anpassung an beliebige Betriebsbedingungen erreicht wird.According to a further embodiment of the invention it is provided that along the axis of the Venturi tube a gas displacement body, e.g. in the form of a Zeppelins, if necessary exchangeable, is arranged. The interchangeability is used for rapid adaptation of the cross-section of the constricted Venturi tube, with which an adaptation to any operating conditions is achieved.
Der Gasverdrängungskörper ist vorzugsweise auf der Seite im Strömungsschatten hohl und weist dort eine entsprechende Austrittsöffnung für das Gas auf. Durch die Hohlräume zur Gasführung wird eine optimale Gasmischung auch im Inneren des Venturi-Rohres erreicht.The gas displacement body is preferably hollow on the side in the flow shadow and there has a corresponding outlet opening for the gas. The cavities for gas guidance an optimal gas mixture is also achieved inside the Venturi tube.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass wenigstens zwei Gaszuführungen für beizumischendes Gas vorgesehen sind. Durch die (wenigstens) zwei Gasanschlüsse wird die Zufuhr verschiedener Gase ermöglicht.According to a further embodiment of the invention, it is provided that at least two gas supply lines are provided for admixing gas. The (at least) two gas connections enable the supply of different gases.
Die Regelhülse muss möglichst passgenau auf dem Venturi-Rohr aufsitzen; sie darf aber auch nicht wegen Verschmutzungen oder thermischer Dehnung schwergängig werden. Nach einer besonderen Ausgestaltung der Erfindung ist vorgesehen, dass die Regelhülse aus einem formstabilen und selbstschmierenden Material besteht.The control sleeve must fit as accurately as possible on the Venturi tube; However, it must not become stiff due to soiling or thermal expansion. According to a particular embodiment of the invention, it is provided that the control sleeve consists of a dimensionally stable and self-lubricating material.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass das formstabile und selbstschmierende Material der Regelhülse Stabilisierungs- und Schmierkomponenten enthält.According to a further embodiment of the invention, it is provided that the dimensionally stable and self-lubricating material of the control sleeve contains stabilizing and lubricating components.
Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass das Material der Regelhülse aus Kunststoff besteht, insbesondere aus einem mit einem Festschmierstoff selbstschmierend ausgestatteten Kunststoff. Ein geeignetes Material ist beispielsweise Murylat SP® (PETP-SP).According to a further embodiment of the invention, it is provided that the material of the control sleeve is made of plastic, in particular of a plastic lubricated with a solid lubricant. A suitable material is for example Murylat SP® (PETP-SP).
Das zum Mischen der Gase verwendete Arbeitsverfahren arbeitet mit einem Mischer mit einem Venturi-Rohr, durch das in Rohrachsrichtung ein Gas strömt und in dessen Bereich mit verengtem Querschnitt durch an der Rohrwand vorgesehene Eintrittsöffnungen beizumischendes Gas strömt, wobei die Durchlassquerschnitte der Eintrittsöffnungen verändert werden, um die Zusammensetzung eines einem Verbraucher zuzuführenden Mischgases den Bedürfnissen anzupassen.The working method used for mixing the gases uses a mixer with a Venturi tube through which a gas flows in the tube direction and in the region of reduced cross-section flows through admixed by inlet openings provided on the tube wall, wherein the passage cross sections of the inlet openings are changed to adapt the composition of a mixed gas to be supplied to a consumer to the needs.
Die Durchlassquerschnitte der Eintrittsöffnungen werden im Betrieb für den Mischungsvorgang kontinuierlich den Bedürfnissen entsprechend verändert, um die Zusammensetzung eines einem Verbraucher zuzuführenden Mischgases kontinuierlich den Bedürfnissen anzupassen.The passage cross sections of the inlet openings are continuously changed in the operation for the mixing process as needed to continuously adapt the composition of a mixed gas to be supplied to a consumer needs.
Die Erfindung wird anhand der Zeichnung näher erläutert. Es zeigen:
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Fig. 1 einen Mischer für gasförmige Medien, der ein Venturi-Rohr enthält, in dessen Bereich mit verengtem Querschnitt an der Rohrwand Eintrittsöffnungen für beizumischendes Gas vorgesehen sind, -
Fig. 2 schaubildlich das Venturi-Rohr des Mischers, wobei der Rohrbereich mit verengtem Querschnitt, in dem die Eintrittsöffnungen für das beizumischende Gas vorgesehen sind, von einer Regelhülse umschlossen ist, die auf dem Rohrbereich verdrehbar ist, wobei zum Verdrehen ein von einem Regelmechanismus beaufschlagter, flexibler bis federsteifer Schubstreifen vorgesehen ist, -
Fig. 3 das Venturi-Rohr mit der Regelhülse und dem zum Verstellen eingesetzten Kunststoffstreifen in Seitenansicht, -
Fig. 4 eine schaubildliche Darstellung der Regelhülse, -
Fig. 5 einen Schnitt durch den Mischer zur Darstellung der Ausbiegung und Anlehnung des Kunststoffstreifens an der inneren Gehäusewand, -
Fig. 6 eine Variante des Verdrehantriebes für die Regelhülse mit einer steifen Schubstange, -
Fig. 7 schaubildlich eine Variante des Mischers mit einem Zahnriemenantrieb der Regelhülse, -
Fig. 8 das Venturi-Rohr mit einer in Explosionsdarstellung gezeigten, zweiteiligen Regelhülse, -
Fig. 9 eine Regelhülse, bei der der Angriffszahnkranz des Zahnriemens zwischen zwei Reihen von Brennstoffregelöffnungen vorgesehen ist, -
Fig. 10 den Brennstoffregelring auf dem Rohrbereich des Venturi-Rohres mit verengtem Querschnitt, -
Fig. 11 das Gehäuse des Mischers mit zwei Einlassöffnungen für verschiedene Brenngase, wobei in dem Querschnitt durch das Venturi-Rohr die zentrale Anordnung des zeppelinförmigen Gasverdrängungskörpers zu erkennen ist, -
Fig. 12 das Gehäuse des Mischers mit einer Schauöffnung zur Kontrolle der Verdrehstellung der Regelhülse, -
Fig. 13 einen Längsschnitt durch das Venturi-Rohr zur Darstellung des zeppelinförmigen Gasverdrängungskörpers. -
Fig. 14 einen Längsschnitt durch den hohlen Gasverdrändungskörper.
-
Fig. 1 a gaseous media mixer including a Venturi tube, in the region of which a reduced cross-section is provided on the tube wall, inlet openings for admixing gas, -
Fig. 2 schematically the venturi tube of the mixer, wherein the tube portion of reduced cross-section, in which the inlet openings are provided for the admixed gas, is enclosed by a control sleeve which is rotatable on the tube portion, wherein for turning a acted upon by a control mechanism, flexible until feather-proof slide strip is provided, -
Fig. 3 the venturi tube with the regulating sleeve and the plastic strip used for adjusting in side view, -
Fig. 4 a perspective view of the control sleeve, -
Fig. 5 a section through the mixer to illustrate the deflection and leaning of the plastic strip on the inner housing wall, -
Fig. 6 a variant of the torsion drive for the control sleeve with a rigid push rod, -
Fig. 7 diagrammatically a variant of the mixer with a toothed belt drive of the control sleeve, -
Fig. 8 the Venturi tube with an exploded two-part control sleeve, -
Fig. 9 a regulating sleeve in which the toothed belt of the toothed belt is provided between two rows of fuel regulating openings, -
Fig. 10 the fuel regulating ring on the tube section of the Venturi tube of reduced cross section, -
Fig. 11 the housing of the mixer with two inlet openings for different fuel gases, wherein in the cross section through the Venturi tube, the central arrangement of the zeppelin-shaped gas displacement body can be seen, -
Fig. 12 the housing of the mixer with a sight opening for controlling the rotational position of the control sleeve, -
Fig. 13 a longitudinal section through the Venturi tube to illustrate the zeppelin-shaped gas displacement body. -
Fig. 14 a longitudinal section through the hollow Gasverdrändungskörper.
Es ist eine Brenngaszuführung 5 zu erkennen. Oberhalb des Gehäuses 2 befindet sich ein Regelmechanismus 6 für eine später erläuterte Regelhülse, die die Zuführung des Brenngases regelbar macht. Der Rohrbereich 7 des Venturi-Rohres 3 mit verengtem Querschnitt ist mit Eintrittsöffnungen 8 für das Brenngas in den Rohrbereich 7 versehen. Im Rohrbereich 7 ist längs der Achse des Venturi-Rohres 3 mittels Streben 9 ein zeppelinförmiger Gasverdrängungskörper 10 angeordnet.It is a
Die Regelhülse 14 ist mit Brenngasregelöffnungen 15 versehen. Die Öffnungen 8 und 15 entsprechen einander, müssen es aber nicht. Die Regelhülse 14 weist einen Kragen 16 auf, an dem ein flexibler bis federsteifer Schubstreifen 17 befestigt ist. Die Schubstange kann beispielsweise eine Steifigkeit in der Größenordnung eines Kabelbinders haben. Das andere Ende des Schubstreifens 17 ist an einer Rolle 18 befestigt. Die Rolle 18 sitzt auf einer Welle 19 des Regelmechanismus 6. Drehbewegungen der Welle 19 werden auf den Schubstreifen 17 übertragen, womit gleichfalls die Regelhülse 14 verdreht, verstellt wird. Der Schubstreifen 17 legt sich beim Schieben an die Wand 20 oder einem ähnlich gearteten Führungselement an und stützt sich an der Wand bzw. dem Führungselement ab. Beim Verdrehen der Regelhülse 14 verstellen sich die Eintrittsöffnungen 8 und die Brennstoffregelöffnungen 15 gegeneinander. Das hat zur Folge, dass sich die offenbleibenden Durchlassquerschnitte 21 verändern. Nach Maßgabe der Vorgaben einer nicht dargestellten Regelvorrichtung lassen sich so die Beimischmengen des Brenngases kontinuierlich an die Anforderungen anpassen.The
In
In
In
Der Kragen 16 und der Zahnkranz 25 können bei allen Varianten der Regelhülse 14 an einer Hülsenseite wie in
Die Streben 9 können hohl sein, um mit den Öffnungen 8 für die Zwecke eines Gastransports durchgängig zu fluchten, und weisen in diesem Fall ihrerseits Öffnungen 30 auf, vorzugsweise auf beiden Seiten der/ jeder Strebe, insbesondere im hinteren Teil der Strebe (in Bezug auf die Strömungsrichtung) und/oder am Ende auslaufend in den Körper 10.The
Claims (15)
dadurch gekennzeichnet, dass
zu den Regelgliedern wenigstens eine, den verengten Querschnitt umfassende Regelhülse (14) gehört, die mit Brennstoffregelöffnungen (15) versehen ist, wobei bei einem gegenseitigen Verstellen der Brennstoffregelöffnungen (15) und der Eintrittsöffnungen (8) durch Verdrehen der Regelhülse (14) die Größe der Durchlassquerschnitte (21) veränderbar ist und
längs der Achse des Venturi-Rohres (3) ein Gasverdrängungskörper angeordnet ist.Mixture for gaseous media with a Venturi tube (3) through which a gas flows in the tube direction and in the region of narrowed cross-section (7) on the tube wall inlet openings (8) are provided for admixing gas, wherein the passage cross-sections (21) of Inlet openings (8) during operation during the mixing process by means of control elements (14) are variable,
characterized in that
to the control members at least one, the narrowed cross-section comprehensive rule sleeve (14), which is provided with fuel flow openings (15), wherein in a mutual adjustment of the fuel flow openings (15) and the inlet openings (8) by turning the control sleeve (14) the size the passage cross-sections (21) is variable and
along the axis of the Venturi tube (3) a gas displacement body is arranged.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007033627A DE102007033627A1 (en) | 2007-07-17 | 2007-07-17 | Gases for gaseous media and method for mixing gaseous media |
Publications (2)
Publication Number | Publication Date |
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EP2016994A2 true EP2016994A2 (en) | 2009-01-21 |
EP2016994A3 EP2016994A3 (en) | 2009-04-01 |
Family
ID=40148979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08012921A Withdrawn EP2016994A3 (en) | 2007-07-17 | 2008-07-17 | Mixer for gaseous media and method for mixing gaseous media |
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EP (1) | EP2016994A3 (en) |
DE (1) | DE102007033627A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012156077A1 (en) | 2011-05-19 | 2012-11-22 | Mtu Friedrichshafen Gmbh | Gas mixer, gas mixing system, gas engine |
DE102011086321A1 (en) * | 2011-11-14 | 2013-05-16 | Mtu Friedrichshafen Gmbh | Gas mixer and gas mixing system |
EP2821130A3 (en) * | 2013-07-02 | 2015-04-22 | Johnson Electric S.A. | Venturi mixer |
GB2544325A (en) * | 2015-11-13 | 2017-05-17 | Caterpillar Energy Solutions Gmbh | A mixer with variable diameter body in venturi |
CN110748440A (en) * | 2018-07-23 | 2020-02-04 | 重庆科克发动机技术有限公司 | Mixer with adjustable air-fuel ratio |
WO2020118228A3 (en) * | 2018-12-07 | 2020-07-23 | Produced Water Absorbents Inc. | Multi-fluid injection mixer and related method |
CN113187591A (en) * | 2021-06-16 | 2021-07-30 | 一汽解放汽车有限公司 | Variable mixer of engine SCR (Selective catalytic reduction) postprocessor and control method thereof |
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DE102011076106A1 (en) | 2011-05-19 | 2012-11-22 | Mtu Friedrichshafen Gmbh | Gas mixer, gas mixing system, gas engine |
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EP2821130A3 (en) * | 2013-07-02 | 2015-04-22 | Johnson Electric S.A. | Venturi mixer |
GB2544325A (en) * | 2015-11-13 | 2017-05-17 | Caterpillar Energy Solutions Gmbh | A mixer with variable diameter body in venturi |
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GB2544325B (en) * | 2015-11-13 | 2017-11-22 | Caterpillar Energy Solutions Gmbh | A mixer with variable diameter body in venturi |
CN110748440A (en) * | 2018-07-23 | 2020-02-04 | 重庆科克发动机技术有限公司 | Mixer with adjustable air-fuel ratio |
WO2020118228A3 (en) * | 2018-12-07 | 2020-07-23 | Produced Water Absorbents Inc. | Multi-fluid injection mixer and related method |
US11673104B2 (en) | 2018-12-07 | 2023-06-13 | Produced Water Absorbents Inc. | Multi-fluid injection mixer and related methods |
CN113187591A (en) * | 2021-06-16 | 2021-07-30 | 一汽解放汽车有限公司 | Variable mixer of engine SCR (Selective catalytic reduction) postprocessor and control method thereof |
CN113187591B (en) * | 2021-06-16 | 2022-08-23 | 一汽解放汽车有限公司 | Variable mixer of engine SCR (Selective catalytic reduction) postprocessor and control method thereof |
Also Published As
Publication number | Publication date |
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DE102007033627A1 (en) | 2009-01-22 |
EP2016994A3 (en) | 2009-04-01 |
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