EP0066875A2 - Dispositif pour la formation d'un mélange inflammable de combustible liquide et de l'air de combustion - Google Patents

Dispositif pour la formation d'un mélange inflammable de combustible liquide et de l'air de combustion Download PDF

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Publication number
EP0066875A2
EP0066875A2 EP82104974A EP82104974A EP0066875A2 EP 0066875 A2 EP0066875 A2 EP 0066875A2 EP 82104974 A EP82104974 A EP 82104974A EP 82104974 A EP82104974 A EP 82104974A EP 0066875 A2 EP0066875 A2 EP 0066875A2
Authority
EP
European Patent Office
Prior art keywords
fuel
combustion air
flow
flow space
bypass
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.)
Granted
Application number
EP82104974A
Other languages
German (de)
English (en)
Other versions
EP0066875A3 (en
EP0066875B1 (fr
Inventor
Siegfried Dr. Förster
Hubert Jaegers
Hans Kämmerling
Peter Dr. Quell
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.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Kernforschungsanlage Juelich 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 Forschungszentrum Juelich GmbH, Kernforschungsanlage Juelich GmbH filed Critical Forschungszentrum Juelich GmbH
Priority to AT82104974T priority Critical patent/ATE30463T1/de
Publication of EP0066875A2 publication Critical patent/EP0066875A2/fr
Publication of EP0066875A3 publication Critical patent/EP0066875A3/de
Application granted granted Critical
Publication of EP0066875B1 publication Critical patent/EP0066875B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/22—Vaporising devices

Definitions

  • the invention relates to a method for forming an ignitable mixture of liquid fuel and combustion air, in which preheated combustion air for receiving fuel is guided along a surface wetted by fuel in a flow space, and to an apparatus for carrying out the method.
  • the preheated combustion air then heats the porous walls of the fuel chamber, so that there is a risk that the fuel will crack on the surface wetted by the fuel and form residues which prevent further supply of fuel through the porous walls. It is therefore necessary to control the burner very sensitively and react to changing states with little delay.
  • the object of the invention is to provide a method for forming an ignitable mixture in which the required fuel-air mixture can be set for different operating conditions without considerable control effort.
  • the amount of fuel evaporating from the fuel film into the preheated combustion air can be determined with good approximation according to the so-called “Levi's law", see for example F. Kneule, “The drying”, Fundamentals of chemical engineering, Volume 6, Verlag Sauerators and Co., Aarau, Switzerland, 1959.
  • the amount of evaporating fuel depends on the temperature of the preheated combustion air and on the temperature of the fuel on the surface of the fuel film formed.
  • the amount of combustion air contacted with the fuel film is regulated by controlling an air flow conducted via a bypass, which is branched off before the combustion air enters the flow space and is fed directly to the fuel-air mixture withdrawing from the flow space the ignitable mixture to be introduced into the combustion chamber is adjustable within a wide control range.
  • a uniform film formation on the surface to be wetted by the fuel is preferably achieved by releasing the fuel at the combustion air inlet to the flow space.
  • the formation of the fuel film and the adhesion of the fuel is supported by roughening the surface of the wall wetted by the fuel.
  • a device for performing the method according to the invention is specified in claim 4. Thereafter, the flow space is connected to a combustion air supply and to an extractor for fuel-air mixture forming in the flow space in such a way that the combustion air flows through the flow space in the flow direction of the fuel flowing off under the action of gravity on the wettable surface. A drain for excess fuel is provided at the foot of the surface wettable by the fuel.
  • the wettable surface is preferably cylindrical and is arranged coaxially with a vertical flow duct carrying the combustion air, claim 5.
  • a gap is provided at the foot of the wettable surface with a gap width that is at least the film thickness of the fuel film at the foot of the wettable surface, claim 6. Through this gap, the excess fuel can flow away freely.
  • the fuel-air mixture flowing to the combustion chamber does not contain any undesirable fuel droplets.
  • the surface wettable by the fuel coaxially surrounds the flow space.
  • the inner wall of the flow space forms a tube, the free interior of which from serves the fuel-air mixture.
  • the surface to be wetted by the fuel is roughened. This leads to an even film formation.
  • the surface that can be wetted by the fuel is displaceably arranged in the flow space. The size of the contact area between the combustion air and the fuel film can thus be changed.
  • a controller unit with which the ignitable mixture to be fed to the combustion chamber can be set very sensitively within wide limits is specified in patent claims 10 to 19.
  • the composition of the ignitable mixture is then regulated via a bypass, which connects the combustion air supply before the combustion air enters the flow space with the extractor for the fuel-air mixture, the amount of combustion air flowing through the bypass into the extractor being adjustable with the aid of a regulator .
  • the controller is preferably operatively connected to a temperature sensor which is arranged in the combustion air supply. The proportion of the amount of combustion air entering the flow space is controlled as a function of the temperature of the preheated combustion air.
  • the fuel-air mixture emerging from the flow space and the proportion of the combustion air supplied to the fuel-air mixture via the bypass determine the composition of the combustion ignitable mixture fed into the chamber.
  • the controller preferably has at least one control element that the flow cross-sections to be flowed through by the combustion air in the bypass and in the combustion air supply before the onset of the Combustion air sets in the flow space at the same time.
  • the flow cross-section in the entrance to the flow space can be changed so that when the bypass is fully open, the access of combustion air to the flow space is blocked.
  • both the inlet of the combustion air to the flow space and the withdrawal of the fuel-air mixture from the flow space are preferably closed, so that no undesired fuel vapor gets into the combustion air flowing through the bypass during cold start and when the device is switched off.
  • control elements are provided which are displaceable relative to one another.
  • the control elements are preferably tubular and arranged coaxially with one another, with at least one of the control elements is adjustably mounted and at the same time changes the flow cross section of the bypass and the flow cross section of the combustion air supply and / or a flow cross section in the fume cupboard for the fuel-air mixture.
  • the control element has recesses that are adjustable relative to recesses of a fixedly arranged control element to change the flow cross sections.
  • detents are attached to the controller.
  • Such a lock is particularly important for the "off" position for safety reasons and for a cold start.
  • the adjustable control element is preferably designed as an axially adjustable sleeve, which closes the flow space when the bypass is open.
  • a control element designed in the simplest way corresponds both to the requirements that have to be placed on sensitive control and to the robust design of the controller that is desired in accordance with the use of the device.
  • the sleeve is preheated against a spring by a temperature sensor depending on the temperature of the flowing in the combustion air supply th combustion air adjustable.
  • the sleeve can be fixed in the position in which the bypass is fully open by means of a switch.
  • the switch also serves as a safety switch.
  • a fuel line is connected to the fuel storage device, which leads to a fuel distributor at the head of the surface to be wetted by the fuel.
  • the excess fuel is thus circulated and is again available for the formation of the fuel-air mixture.
  • the fuel flows out of the fuel distributor onto the surface to be wetted.
  • the fuel line is connected to a heat exchanger which is arranged inside the combustion air supply.
  • the fuel film in the flow chamber thus has a temperature which is only slightly below the temperature at which the combustion air enters the flow chamber and which is so high that all oil fractions in the fuel can evaporate into the supplied combustion air.
  • the fuel store has a heater element for preheating the fuel.
  • a cooling element for the fuel is provided in the fuel store.
  • thermal insulation is attached to the exhaust for the fuel-air mixture and / or to a gas line leading the ignitable mixture to the combustion chamber.
  • a flow chamber 1 for forming an ignitable mixture of liquid fuel and combustion air is shown schematically.
  • the combustion air is guided into the flow space 1 via a surface 2 of a wall 3 which can be wetted by fuel.
  • the combustion air flows through the flow space in the direction of flow of the fuel flowing off under the influence of gravity on the surface.
  • the flow direction of the combustion air is marked in flow space 1 in FIG. 1 by arrows on a white background.
  • the fuel is distributed uniformly by means of a fuel distributor 4 at the head of the surface 2 and trickles as a fuel film, in FIG. 1 reference number 5, under the action of gravity to the foot 6 of the wettable surface 2.
  • a gap between the wettable surface and the lower end 10 of the flow space 1 serves as the outlet 9 for the fuel.
  • the gap has a gap width 11 which is only slightly larger than the film thickness of the fuel film 5 which forms at the foot 6 of the surface
  • the fuel gap is open at the bottom.
  • the fuel distributor 4 is connected to a fuel chamber 13 for supplying fuel and is arranged on the head of the surface 2 to be wetted in the exemplary embodiment according to FIG. 1 directly in the region of the mouth of a combustion air supply 14 in the flow space 1.
  • the fuel emerging from the fuel distributor 4 is distributed uniformly over the surface to be wetted, distribution and Adhesion of the fuel film is promoted by roughening the surface.
  • the wall 3, on the surface of which the fuel trickles down under the influence of gravity in the direction of flow of 4 combustion air is made of ceramic with a fine-grained surface structure.
  • walls of metal whose surface is roughened, for example sandblasted can also be used.
  • FIG. 2 shows an exemplary embodiment with a cylindrical fuel chamber 13a, which is surrounded at a distance by a vertically arranged flow guide 15, with a flow chamber corresponding to the flow chamber 1 in FIG. 1 between the outer surface of the fuel chamber 13a and the inner wall side of the flow guide 15 16 is formed.
  • the combustion air is introduced at the head of the flow space 16 via a combustion air supply 17.
  • the direction of flow of the combustion air led to the flow space 16 is identified in FIG. 2 by A 'and by a dashed flow line.
  • the fuel-air mixture is deflected by 180 degrees at the foot of the wetted surface at the outlet 19 and flows through a flue 20 coaxially surrounding the flow space 16 and a gas space 20a into a gas line 21 guiding the ignitable mixture.
  • trigger 20 and gas space 20a and gas line 21 are designed insulated on their outer sides. The excess fuel flows via the outlet 18 into a fuel store 22, from which it can be drawn off via a delivery line 23.
  • the fuel chamber 13a has porous walls 24 through which the fuel introduced into the fuel chamber via fuel lines 25, 26, 27 exits into the flow space 16 over the entire height of the walls 24. This enables fuel to be replenished evenly over the entire wetted surface. Appropriate fuel pressure within the fuel chamber ensures that more and more fuel trickles down the surface to be wetted than evaporates into the warm combustion air conducted in the flow space.
  • the device shown in FIGS. 2 and 3 can be regulated in two ways.
  • the size of the surface to be wetted by the fuel which is swept by the combustion air in the flow space, can be changed by adjusting the fuel chamber 13a.
  • the flow guide 15 arranged in the vertical direction faces axially displaceably arranged fuel chamber 13 has a shaft 28 which penetrates the fuel store 22 and can be screwed into a base plate 29 of the fuel store.
  • the shaft 28 is guided to the outside and can be locked here by means of a clamping sleeve 30.
  • the fuel chamber 13 can be unscrewed from the flow space 16 or screwed into the flow space, the surface of the combustion air that is wetted with fuel being reduced or enlarged.
  • the contact area that is available for the absorption of evaporating fuel in the preheated Verr adoptedungs Kunststoff can be adapted to the conditions in the flow space depending on the quality of the fuel.
  • a bypass controller 31 is provided for the supply of combustion air to the flow space, which enables only a part of the quantity of combustion air flowing in the combustion air supply 17 to be introduced into the flow space 16.
  • the remaining part of the combustion air flows via a bypass 32 directly into the fuel-air mixture which is withdrawn from the flow space 16 via the discharge 20 and the gas space 20a into the gas line 21.
  • the direction of flow of the combustion air guided through the bypass is marked in FIG. 2 by a flow arrow A drawn with a solid line.
  • the combustion air flowing out via the bypass is introduced into the gas space 2Qa leads into which the trigger 20 for the fuel-air mixture opens with the distribution chamber 33.
  • the bypass controller 31 consists of an adjustable control element 34 which, in the exemplary embodiment, is rotatably guided by means of a lever 35 within an angle 37 predetermined by detents 36, 36 ', see FIG. 3, relative to a control element 38 fixedly attached to the flow guide 15.
  • a control element 38 fixedly attached to the flow guide 15.
  • flow channel 15 and control element 38 are made in one piece.
  • the control elements 34 and 38 have recesses 39 and 40 for forming the bypass.
  • the recesses 39 and 40 are formed uniformly and arranged such that the recesses 39 of the adjustable control element 34 and the recesses 40 of the fixedly arranged control element 38 are one above the other in the "off" position of the bypass control, the entire flowing in the combustion air supply Combustion air flows out through the bypass 32 into the gas line 21 without entering the flow space 16.
  • the bypass controller 31 is shown in Figures 2 and 3.
  • the bypass controller 31 closes the trigger 20 for the fuel-air mixture above the distributor chamber 33.
  • the control element 34 has recesses 41 with which recesses 42 of the fixedly arranged control element 34 are covered, which spatially connect the distribution chamber 33 with the gas space 20a.
  • the recesses 41 are displaced relative to the recesses 42.
  • the recesses 42 are shown in Figure 3 with dashed lines. If combustion air is to be introduced into the flow space 16, the control element 34 is brought out of the "off" position shown in FIGS. 2 and 3 by moving the lever 35 into an operating position.
  • the bypass 32 is closed and all of the combustion air is passed through the flow space 16.
  • the recesses 41 and 42 are one above the other, while the recesses 39 and 40 overlap one another and thus close the bypass 32.
  • the ignitable mixture flowing through the gas line 21 to the fuel chamber has the maximum possible fuel content in this regulator position.
  • FIG. 4 A further exemplary embodiment of a device designed according to the invention is shown schematically in FIG. 4.
  • a flow space 43 corresponding to the flow space 1 according to FIG. 1 is an annular gap between an inner surface 44 of a hollow cylinder 45 wettable by the fuel and the outer side of the wall perpendicular to the top Cylinder flow guide 46 used.
  • the preheated combustion air is supplied to the flow space 43 via a combustion air supply 47.
  • the combustion air flows through a control element 48, corresponding to the control element 34 in the exemplary embodiment according to FIGS. 2 and 3 for regulating the bypass flow and adjustable by turning, to the inlet 49 of the flow space 43.
  • the direction of flow of the combustion air entering the flow space is shown in FIG. 4 with an arrow A 'marked with a solid line.
  • a fuel line 50 opens at a fuel distributor 51 below the inlet 49, through which the combustion air flows.
  • the fuel distributor 51 consists of a ring made of ceramic permeable to the fuel or, for example, of a fine ceramic Bores provided metal ring, which has such a high flow resistance that the fuel exits evenly on the entire outer ring surface of the fuel distributor.
  • the fuel distributor 51 is inserted at the head of the flow space 43 into the wall of the cylinder 45 in such a way that the emerging fuel forms a trickle film on the surface 44 to be wetted by the fuel.
  • the fuel flows under the influence of gravity to the foot 52 of the surface 44, which is roughened as in the exemplary embodiment according to FIGS.
  • the adjustable control element 48 for regulating the combustion air flow in the bypass 56 between the combustion air supply 47 and the interior 55 of the flow guide 46 is shown schematically in FIG. 4 at the same time in two of its control positions. To the left of a center line 57 of the flow guide 46, the control element 48 is shown in its "off" position with the bypass 56 open and the inlet 49 of the flow space 43 closed. The direction of flow of the combustion air through the bypass 56 is marked with arrow A with a dashed line. To the right of the center line 57, the control element 48 is shown with the bypass 56 closed and the inlet 49 fully open.
  • the control element 48 has recesses 58 and 59, which regulate the combustion air flow in the bypass 56 compared to recesses 60 in the wall of the Flow channel 46 and with respect to recesses 61 in the wall of the combustion air supply 47 are adjustable.
  • the control element 48 corresponds in its normal function to the control element 34 according to FIGS. 2 and 3. However, in contrast to the control element 34, the control element 48 does not create a flow cross section in the exhaust of the fuel-air mixture, but rather a flow cross section in the combustion air supply in front of the inlet 49 Flow space 43 set.
  • the combustion air flows from the "off" position into an operating position through the recesses 59 and 61, and through the inlet 49 into the flow space 43 and takes up evaporating fuel here.
  • the fuel-air mixture flows to the combustion chamber in the interior 55 of the flow channel 46, which is open at the bottom and is spatially connected to the flow channel 43.
  • FIG. 5 Another embodiment of a bypass control is shown in Figure 5.
  • the adjustable control element is designed as an axially displaceable sleeve 62.
  • This control element is also shown in two of its positions in FIG. 5: to the left of a center line 110 is the "off" position of the bypass control, to the right of the center line 110 is the operating position at maximum fuel content in the ignitable mixture.
  • the sleeve 62 has recesses 64 which are relative to slot-shaped recesses 65 in a flow guide 66, which corresponds to the flow guide 46 of the exemplary embodiment according to FIG. 4, are displaced when adjusting the sleeve 62.
  • the sleeve 62 is provided at its end facing the flow space 67 with a closure 69, which in the "off" position of the bypass controller, that is to say when the bypass is fully open, closes the access to the flow space 67.
  • the sleeve 62 is operatively connected to a temperature sensor which is arranged in a combustion air supply 70.
  • the sleeve 62 is adjustable against a prestressed spring 71, which is articulated by means of a pull rod 72 on a pin 73 of the adjustable sleeve 62, via a rocker arm 74.
  • the rocker arm 74 is rotatably mounted on a carrier 75 in a vertical plane.
  • the carrier 75 consists of a corrugated tube which is filled with oil and changes its length depending on the temperature of the combustion air in the combustion air supply 70 relative to a linkage 76 on which the rocker arm 74 is pivotally articulated.
  • the pull rod 72 articulated on the pin 73 of the sleeve 62 is guided to the outside and, when displaced by means of a button 80, enables the bypass control to be set to “off”.
  • the displacement of the tie rod 72 is limited by a stop 81 on the sleeve 62. If the button is released again after actuation of the button 80, the sleeve 62 is brought back into the operating position predetermined by the position of the rocker arm 74 by means of the spring force of the spring 71.
  • a safety switch can thus also be connected to the button 80.
  • a fuel line 85 opens into the fuel store, which can be closed by means of a float valve 86 controlled by the liquid level in the fuel store.
  • the fuel accumulator 54 can be emptied via a lock 87 which is adjustable against a spring and which is arranged in the bottom of the fuel accumulator.
  • the fuel is sucked out of the fuel reservoir 54 by means of a fuel pump 90 from a fuel chamber 89 surrounded by a filter 88.
  • the fuel pump 90 feeds the fuel into the fuel line 50 leading to the fuel distributor 51.
  • the fuel is still in a heat exchanger 91, to which the fuel line 50 is connected, from which the combustion air supply 47 preheated combustion air flowing.
  • a heat exchanger 92 corresponding to the heat exchanger 91 is also arranged in the combustion air supply 70 in the exemplary embodiment according to FIG. 5.
  • FIG. 6 Another exemplary embodiment of a bypass controller with an axially displaceable control element is shown schematically in FIG. 6.
  • a flow space 93 which is designed in the same way as in the exemplary embodiments according to FIGS. 3, 4 and 5 as an annular space between the inner surface of a hollow cylinder 94 and the outer wall surface of a flow guide 95, serves to hold fuel in combustion air.
  • the combustion air is introduced into the flow space 93 via a combustion air supply 96 and an inlet 97 tapering towards the flow space 93.
  • the fuel is added to the inner surface of the hollow cylinder 94 from a fuel chamber 98 into which a fuel line 99 opens.
  • the fuel flows through an annular gap 100 onto the inner surface of the hollow cylinder 94.
  • the gap width is dimensioned such that the fuel covers the entire surface of the combustion air around which Hollow cylinder wetted and trickled under the influence of gravity to the outlet 101 of the fuel-air mixture at the lower end of the flow space 93.
  • the fuel-air mixture is deflected by 180 ° C. and discharged in the interior 102 of the flow guide 95, so that the flow guide 95 delimiting the flow space 93 on its inside also serves to draw off the fuel-air mixture.
  • the fuel is led from the outlet 101 via a fuel collector 103 and a drain line 104 connected thereto to the fuel store 105.
  • the fuel store has a fuel supply 106 and an outlet 107 to which the fuel line 99 can be connected analogously to the exemplary embodiment according to FIG. 4, so that excess fuel added can be used again to form the fuel-air mixture.
  • the fuel pump required for the fuel circulation is not shown in FIG. 6.
  • the flow guide 95 itself serves to regulate the bypass flow which is introduced from the combustion air supply 96 into the fuel-air mixture withdrawing from the flow chamber 93.
  • the flow guide 95 itself is shifted in the exemplary embodiment according to Figure 5 shown depending on the temperature of the combustion Air supply 96 flowing combustion air via a temperature sensor used in the combustion air supply.
  • these control elements for the displacement of the flow guide 95 are not shown again to simplify the illustration.
  • the flow guide 95 in the area of the combustion air supply has recesses 108 which can be pushed over recesses 109 when the flow guide is adjusted axially, which are provided in a gas outlet 111 for the fuel-air mixture.
  • the gas outlet 111 is welded into the combustion air supply and thus forms a stationary control element with respect to the flow guide 95, which, as stated above, is used as an adjustable control element.
  • the recesses 109 in the gas outlet 111 run in a plane perpendicular to the pipe axis 112 of the gas outlet and are designed in the shape of a slot.
  • the flow guide 95 is shown as a sliding control element at the same time in its two extreme positions.
  • the operating position is shown to the left of the pipe axis 112, in which the fuel-air mixture has the maximum fuel content, to the right of the pipe axis 112 the "off" position of the control element is shown with the bypass 113 fully open and the flow space 93 closed.
  • flow arrows drawn For the two extreme positions of the bypass controller, the flow of the combustion air is indicated by flow arrows drawn. On the left side of the pipe axis 112, flow arrow A 'and a dashed flow line mark the penetration of the combustion air into the flow space 93, on the right side the outflow of the combustion air through the bypass 113 into the gas outlet 111 is indicated with flow arrow A and a continuous flow line. In the last-mentioned regulator position, the flow space 93 is completely closed by the flow guide 95.
  • the flow guide 95 on the one hand has sealing elements 119a in the area of the inlet 97 to the flow chamber 93, which are arranged in a ring on the outer jacket of the flow guide 95 and can be inserted into the inlet 97 when the bypass 113 is opened such that access to the flow chamber 93 is provided fully opened bypass is closed.
  • the outlet 101 is also closed when the bypass at the foot 114 of the flow guide 95 is fully open. As shown in FIG. 6 to the right of the pipe axis 112, the foot 114 of the flow guide 95 is seated on a base 115 when the bypass is fully open, and closes the interior 102 of the flow guide 95 provided for the removal of the fuel-air mixture.
  • the base 115 is designed so that it slopes downward toward the fuel collector 103 so that any fuel remaining in the region of the base can be introduced into the fuel collector 103.
  • the base 115 is of lightweight construction.
  • the base points toward the interior 102 of the flow guide 95 at the foot of the base is placed on the conical cap 116, the base cavity 117 thus created being relieved of pressure via a ventilation bore 118.
  • the flow guide 95 is centered in the lower part of the flow space 93 with guides 120.
  • FIG. 1 Another embodiment of the device according to the invention is shown in FIG.
  • the device has a plurality of flow channels 119 for the combustion air which are arranged parallel to one another.
  • Each flow channel 119 is supplied with fuel via a fuel distributor 120, which trickles through the flow channel as a fuel film.
  • the fuel is conducted from the fuel distributor 120 into blind bores 121, which are embedded in walls 122 of the flow channels 119 in their entire longitudinal extent.
  • the blind bores 121 are spatially connected to the flow channels 119 via slot-shaped recesses 123 in the walls 122, the width of the recesses 123 thus It is dimensioned that there is sufficient flow resistance for the inflowing fuel for a uniform outflow of the fuel onto the entire surface of the flow channels 119 around which the combustion air flows.
  • the excess fuel flows from the flow channels 119 via a junction 124 into a fuel store 125 arranged below the flow channels 119.
  • the fuel becomes the fuel distributor in the same way as in the exemplary embodiment shown in FIG. 4 by means of a fuel pump 126 in a fuel line 127 to the fuel distributor 120 funded.
  • the fuel line 127 is guided via a heat exchanger 129 arranged in a combustion air supply 128.
  • a control element 130 which can be displaced in the indicated arrow direction and with which the flow cross sections at the entrance of the flow channels 119 can be changed is arranged.
  • a bypass 131 through which the combustion air flows parallel to the flow channels 119 is opened or closed to regulate the supply of combustion air to the flow channels 119.
  • the Bypass 131 is identified in FIG. 7 by a dashed flow line for the combustion air in the bypass.
  • FIG. 7 shows the control element 131 in an operating position in which the entire combustion air flowing in the combustion air supply 128 is guided through the flow channels 119 in the direction of the flow arrow A ′ (solid flow line). From the outlet of the flow channels, a gas outlet 132 leads the fuel-air mixture to a combustion chamber, not shown.
  • the "off" position of the control element 130 is given in the exemplary embodiment according to FIG. 6 when the entrances to the flow channels 119 are completely covered.
  • the ignitable mixture can be adapted very precisely over wide ranges to the required operating conditions, such as those which occur with different performance requirements for combustion and heating devices.
  • the mixture burns soot-free and leads to low levels of carbon monoxide in the exhaust gas. All devices are not only robust, but also easy to use.
  • the temperature of the combustion air is used as the control variable.
  • combustion air is preheated by exhaust gases from the combustion chamber.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Control Of Combustion (AREA)
  • Air Supply (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP82104974A 1981-06-09 1982-06-07 Dispositif pour la formation d'un mélange inflammable de combustible liquide et de l'air de combustion Expired EP0066875B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104974T ATE30463T1 (de) 1981-06-09 1982-06-07 Vorrichtung zur ausbildung eines zuendfaehigen gemisches aus fluessigem brennstoff und verbrennungsluft.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3122770 1981-06-09
DE3122770A DE3122770C2 (de) 1981-06-09 1981-06-09 Einrichtung zur Erzeugung eines Brennstoff-Luft-Gemisches durch Verdunsten von Brennstoff in vorgewärmte Verbrennungsluft

Publications (3)

Publication Number Publication Date
EP0066875A2 true EP0066875A2 (fr) 1982-12-15
EP0066875A3 EP0066875A3 (en) 1984-08-22
EP0066875B1 EP0066875B1 (fr) 1987-10-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104974A Expired EP0066875B1 (fr) 1981-06-09 1982-06-07 Dispositif pour la formation d'un mélange inflammable de combustible liquide et de l'air de combustion

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Country Link
US (1) US4486362A (fr)
EP (1) EP0066875B1 (fr)
JP (1) JPS585A (fr)
AT (1) ATE30463T1 (fr)
DE (1) DE3122770C2 (fr)

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DE3526866A1 (de) * 1985-07-26 1987-02-05 Kernforschungsanlage Juelich Verdampfer fuer fluessigen brennstoff zur erzeugung eines brennstoff-luft-gemisches
US4641477A (en) * 1986-01-06 1987-02-10 Schleck Herman A Adjustable modular building
JPS62160412A (ja) * 1986-01-08 1987-07-16 Asahi Optical Co Ltd マクロレンズ
DE3626933A1 (de) * 1986-08-08 1988-02-18 Kernforschungsanlage Juelich Verfahren und vorrichtung zur erzeugung eines brennbaren gasgemisches aus fluessigem brennstoff, wasserdampf und verbrennungsluft
JPH0812326B2 (ja) * 1986-09-01 1996-02-07 ミノルタ株式会社 逆望遠型広角レンズ
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Also Published As

Publication number Publication date
EP0066875A3 (en) 1984-08-22
EP0066875B1 (fr) 1987-10-28
DE3122770A1 (de) 1982-12-30
ATE30463T1 (de) 1987-11-15
US4486362A (en) 1984-12-04
JPS585A (ja) 1983-01-05
DE3122770C2 (de) 1985-03-14

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