EP0405311B1 - Procédé de production d'un bouillard transportable dans un courant gazeux et dispositif de mise en oeuvre - Google Patents

Procédé de production d'un bouillard transportable dans un courant gazeux et dispositif de mise en oeuvre Download PDF

Info

Publication number
EP0405311B1
EP0405311B1 EP90111617A EP90111617A EP0405311B1 EP 0405311 B1 EP0405311 B1 EP 0405311B1 EP 90111617 A EP90111617 A EP 90111617A EP 90111617 A EP90111617 A EP 90111617A EP 0405311 B1 EP0405311 B1 EP 0405311B1
Authority
EP
European Patent Office
Prior art keywords
carrier gas
gas stream
liquid
nozzle
mixing chamber
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.)
Expired - Lifetime
Application number
EP90111617A
Other languages
German (de)
English (en)
Other versions
EP0405311A1 (fr
Inventor
Siegfried Schilling
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.)
Sintermetallwerk Krebsoege GmbH
Original Assignee
Sintermetallwerk Krebsoege 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 Sintermetallwerk Krebsoege GmbH filed Critical Sintermetallwerk Krebsoege GmbH
Priority to AT90111617T priority Critical patent/ATE100924T1/de
Publication of EP0405311A1 publication Critical patent/EP0405311A1/fr
Application granted granted Critical
Publication of EP0405311B1 publication Critical patent/EP0405311B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0012—Apparatus for achieving spraying before discharge from the apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/168—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed with means for heating or cooling after mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/1686—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed involving vaporisation of the material to be sprayed or of an atomising-fluid-generating product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
    • F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
    • F23D11/30—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed with return feed of uncombusted sprayed fuel to reservoir
    • 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 producing a liquid mist that can be conveyed in a carrier gas.
  • the atomization or nebulization of a liquid in a carrier gas is particularly difficult when relatively small mass flows of less than two kilograms per hour are to be atomized with a high degree of fineness (drop diameter less than 100 ⁇ m), ie the smallest liquid droplets have to be generated.
  • a high degree of fineness drop diameter less than 100 ⁇ m
  • the geometric transverse dimensions for mass flows in the range of two kilograms / hour are 0.1 to 0.3 mm, which in practice increases Blockages and thus leads to non-reproducible degrees of atomization.
  • atomizing mist devices which are operated with a propellant gas, in particular air, to atomize a liquid.
  • a propellant gas in particular air
  • the liquid to be atomized for example the heating oil
  • the liquid to be atomized is atomized with compressed air or water vapor in an injector nozzle or curved guide surfaces.
  • Good atomization levels can be achieved with small throughputs.
  • a disadvantage is the amount of equipment needed to generate the compressed air, for. B. with compressed air atomizers. Only compressors can be used for the required air pressures from 0.6 to 1.2 bar and volume flows from 600 to 1200 dm3 / h, since these pressure increases cannot be achieved technically with fans.
  • the invention has for its object to provide a method for producing a liquid mist that can be conveyed in a carrier gas stream, in which it is ensured that only the smallest droplets up to a size-limited droplet size are detected by the carrier gas stream.
  • This object is achieved according to the invention with the method features specified in the characterizing part of claim 1.
  • This method has the advantage that even with atomization by means of a conventional atomizing nozzle, which produces a droplet collective with large differences in the droplet diameter, all droplets which are too large for the intended use are eliminated, that is to say the droplet collective is "classified”.
  • Another advantage of this method is that the mixing ratio between carrier gas and mist can also be regulated automatically via the carrier gas throughput, since, for given flow cross sections, the drag forces acting on the finest droplets through the carrier gas are dependent on the flow velocity of the carrier gas. With constant liquid throughput and low carrier gas velocity, only the finest droplets in the deflection area are carried along, while the larger droplets are eliminated.
  • liquid mass flow can only be changed slightly with regard to the degree of atomization for a given nozzle cross section and limits are also set for the flow velocity of the carrier gas in the deflection area with due regard to the compliance with the limit conditions for the droplet size to be absorbed by the carrier gas, it is precisely when the upper limits specified thereby are reached by the additional evaporation of liquid drops over a heatable contact surface in the carrier gas stream to improve the result.
  • an aerosol-like nebulization of the liquid is achieved both with evaporation and without evaporation of the separated droplet fraction, which allows, for example in the nebulization of heating oil, the carrier gas stream laden with mist to be led to the place of use via a line system like a fuel gas, only the usual conditions for avoiding falling below the dew point and thus for condensation processes on the channel surfaces, for example by heating the carrier gas and / or heating the channel walls, must be observed.
  • the droplet portions to be evaporated are collected and evaporated in the atomization area on a heatable contact surface. This can be done, for example, in such a way that a part of the nozzle jet strikes the heatable contact surfaces directly, for example through a wide-ranging nozzle.
  • the drop portion to be evaporated is taken up by the surface of an open-pore contact body serving as the contact surface, heated to boiling temperature in the contact body and released again as a drop-steam mixture from the contact surface to the carrier gas stream.
  • the special effect of this embodiment of the invention results from the fact that not only does the evaporating liquid portion get into the carrier gas stream, but that due to the formation of steam in the contact body, liquid bubbles form at the surface which burst as a result of the pressing steam, with part of the bubble surface being the very finest Drops are thrown back into the carrier gas stream. This process is particularly effective when atomizing a liquid that is composed of components with different boiling temperatures.
  • the heating in the area of the contact body then only needs to take place to the temperature of the low-boiling liquid portion. Since in this procedure, in addition to the evaporation, some of the liquid is atomized purely mechanically into the finest droplets, this results in a reduction in the heating energy required.
  • the droplet fraction separated from the carrier gas stream and combined in a return flow is passed over a heat exchanger and releases its heat to the liquid flowing for atomization. This procedure is particularly advantageous if at least part of the carrier gas stream is heated before being introduced into the atomization area.
  • the invention further relates to a device for producing a liquid mist which can be conveyed in a carrier gas stream, in particular according to the method according to the invention, with a mixing chamber which has at least one inlet for a carrier gas stream, at least one atomizing nozzle for the introduction of a liquid as a drop collective and at least one outlet for the Liquid mist is provided, according to the preamble of claim 7.
  • the device is designed such that the wall of the mixing chamber has a contact surface which is connected to a heating device. This ensures that even in the mixing chamber itself the droplet portions hitting the wall can be evaporated into the carrier gas stream.
  • the mixing chamber is tubular with its contact surface and the carrier gas stream is introduced into the mixing chamber as a swirl flow.
  • the large drops are largely ejected in the feed area against the wall of the mixing chamber, are then carried along as a liquid film by the carrier gas stream, so that the ejected drop portion can be evaporated into the carrier gas stream in the manner of thin-film evaporation.
  • the deflection area therefore, only larger drops, which cannot be thrown out by the swirl flow, are to be separated from the carrier gas stream.
  • the nozzle jet can be introduced into the carrier gas stream at an angle.
  • the mixing chamber in the nozzle area is provided with at least one inlet opening, which is preferably oriented in the direction of the nozzle jet, for at least part of the carrier gas.
  • This arrangement has the advantage that an intimate mixing of droplets and carrier gas can already take place, with larger droplets in particular being able to be accelerated via the flow velocity of this partial flow.
  • the carrier gas flow can be introduced into the mixing chamber as a swirl flow, so that a separation of larger drops is already ensured in this area.
  • the nozzle is designed as a Venturi nozzle and is connected to a supply line for compressed air to support atomization.
  • the primary air required for use as an oil atomizer for a downstream burner can be introduced into the mixing chamber to support atomization.
  • the mixing chamber is tubular and is arranged coaxially to the nozzle, that the end of the mixing chamber facing away from the nozzle opens into a deflection chamber and that the wall of the deflection chamber opposite the mouth of the mixing chamber is designed as a deflection surface.
  • the deflection chamber coaxially surrounds the tubular mixing chamber and that the outlet for the carrier gas stream laden with the liquid mist is arranged in the counterflow direction to the jet stream at a distance from the mouth of the mixing chamber in the deflection chamber.
  • the arrangement of a wiper rotor in the tubular mixing chamber, which is assigned to the atomizing nozzle, is particularly expedient.
  • the wiper rotor is provided with at least two radially oriented wiper blades, each of which has at least one nozzle opening. The liquid fractions impinging on the wiper blades are thrown outwards by the centrifugal force, so that with the most favorable flow of the carrier gas through the mixing chamber, practically the entire amount of liquid reaches the contact surface and can evaporate there.
  • the wiper blades are expediently shaped like a screw or propeller, so that the wiper blades act as a fan for the carrier gas flow passed through the mixing chamber, with the corresponding drive power of a preferably speed-controllable motor, so that at least the flow resistance is reduced in this area.
  • the deflecting surface forms a contact surface and is connected to a heating device.
  • This arrangement can be used alone or in combination with a mixing chamber wall designed as a heatable contact surface.
  • the deflection surface is formed by a deflection body arranged in the carrier gas flow.
  • a deflection body arranged in the carrier gas flow.
  • the contact surface is formed by the free surface of an open-pore contact body, which is connected in its area facing away from the contact surface with a preferably electrical heating device.
  • the arrangement of such an open-pore contact body which for example can also form the wall of the mixing chamber, is expediently used, in particular, when atomizing liquid mixtures with liquid components of different boiling temperatures. Due to the capillary action, the liquid penetrates into the contact body, the low-boiling part evaporates and drives off the higher-boiling, still liquid liquid part in bubble form at the contact surface, the bursting bubbles in the form of very fine drops in the carrier gas stream be thrown out.
  • the open-pore contact body expediently consists of a sintered metal and expediently has a porosity that corresponds to a void volume between approximately 30 to 80%, preferably 40 to 60% of the contact body volume.
  • the average pore diameter in the contact body is advantageously between about 20 to 150 microns, preferably between 40 and 100 microns.
  • an outlet valve which is automatically set as a function of the pressure in the liquid supply is arranged in the area of the discharge for the return liquid. This ensures proper withdrawal of the return liquid from the mixing or deflection chamber, since the outlet valve then opens depending on the amount of liquid introduced into the mixing chamber via the atomizing nozzle.
  • a mixing chamber 1 which, for example, has a circular cross section.
  • An atomizing nozzle 2 opens into the mixing chamber 1 and is connected to a feed pump 4 via a pipe 3.
  • two feed lines 5 open into the mixing chamber 1 for the introduction of a carrier gas, which is guided in the mixing chamber in direct current to the spray jet 6.
  • the droplet collective introduced into the carrier gas partial stream via the spray jet 6 is now deflected.
  • This can be done, as indicated schematically in Fig. 1, in that the carrier gas-drop mixture is introduced into a main carrier gas stream 7 at an angle or in that the total amount of carrier gas introduced coaxially to the spray jet 6 by a corresponding bending of the flow channel is redirected.
  • This is indicated in Fig. 1 by the dashed extension 9 of the side wall 8 of the mixing can 1.
  • the deflection area forms the deflection chamber 22 with outlet 21.
  • the wall 10 directly opposite the nozzle 2 forms a deflecting surface.
  • a pressure-dependent controllable outlet valve which is controlled via a pressure control device 15 located in the inlet line 3, ensures that the outlet cross-section available for the return liquid is always proportional to the amount of liquid applied.
  • the thermal energy contained in the return liquid is expediently recovered via a heat exchanger 16 which is connected to the delivery line 3.
  • the wall part 17 forming the deflection surface 10 is, for example, designed to be electrically heatable in the exemplary embodiment shown, which is indicated schematically by the heating rods 18.
  • the liquid drops converging on the deflecting surface to form a liquid film are now at least partially evaporated when the wall part 17 is heated to the boiling point of the liquid, so that the vapor formed (arrow 19) is carried along by the carrier gas stream.
  • the expenditure of thermal energy is relatively low, since only a thin layer of liquid can be evaporated. It is important here that the deflecting surface 10 serving as a heatable contact surface extends a sufficient length beyond the impact area 20 of the large drops, so that undisturbed vapor formation is achieved.
  • the wall part 17 forming the contact surface can also be designed as an open-pore contact body to improve the evaporation performance, so that the capillary action the impinging drops are sucked up, a very rapid evaporation takes place again within the contact body, the vapor which is formed driving a portion of the liquid undevaporated back to the surface and thereby forming bubbles.
  • the bubbles burst, with part of the blister skin being carried away in the form of very fine drops by the carrier gas stream together with the steam component. This is particularly advantageous if the liquid to be atomized is formed from a mixture of liquids with different boiling points.
  • the low-boiling liquid component evaporates and expels the higher-boiling liquid component in the form of very fine droplets into the carrier gas stream.
  • a modified device is shown schematically in FIG. Parts that have the same function as in accordance with the embodiment. 1 have already been described, are provided with the same reference numerals.
  • the liquid is introduced as a drop collective into a mixing chamber 1 via a nozzle 2 as a spray jet 6.
  • a carrier gas stream is introduced into the mixing chamber 1 via the feed lines 5 coaxially with the spray jet 6, and depending on the intended use, the carrier gas stream can also be introduced into the mixing chamber 1 as a swirl flow in the introduction area.
  • the flow of the carrier gas-drop mixture is drawn under sharp deflection through 180 ° through an outlet 21, so that only the finest droplets can be taken from the carrier gas, since the influence of the drag forces is greater in the deflection chamber 22 than the action of centrifugal forces.
  • the drops (arrow 11) that exceed the predetermined maximum drop size are ejected against a deflection surface 10, from which they are then drawn off via a trigger 13 from the deflection chamber 22 defined by the deflection area subtracted from.
  • the deflecting surface 10 can in turn be formed by a deflecting body 17 provided with a heating device 18, so that the droplet portions collecting thereon can be evaporated into the carrier gas stream (arrow 9).
  • the deflection body 17 can again be designed as an open-pore contact body in order to improve the atomization effect by evaporation.
  • the wall 23 of the mixing chamber 1 is also designed to be heatable, so that the liquid components impinging on the surface of the preferably tubular mixing chamber 1 are evaporated into the carrier gas stream.
  • the heating of the wall of the mixing chamber 1 can be omitted.
  • the liquid portions striking the mixing chamber wall converge to form a film, which then tear off in the form of large drops at the end of the mixing chamber facing away from the nozzle 2, the size of which cannot be carried away by the flow deflected in this area.
  • the heating is switched on in this case, the amount of liquid collecting on the inner wall of the mixing chamber 1 is evaporated into the carrier gas stream in accordance with the heating power, so that here, in addition to a regulation of the amount of carrier gas, which has a direct effect on the flow velocity within the device,
  • An additional control option for the mixing ratio between carrier gas and liquid mist can be influenced via the heating power.
  • the inner wall of the mixing chamber 1 can again be formed by an open-pore contact body, so that the evaporation processes already described above can take place.
  • Fig. 3 shows another embodiment, as it can be used in particular as a heating oil burner.
  • the heating oil is fed in via a delivery line 3 under pressure from an atomizing nozzle 2, the spray jet 6 of which is introduced axially into a tubular mixing chamber 1.
  • Combustion air is introduced coaxially to the nozzle 2 into the mixing chamber 1 via the inlet 5.
  • the mixing chamber 1 is formed by a tube 25 made of a material that is a good conductor of heat, the wall of which is provided with a heating device 18 at its end facing the atomizing nozzle 2.
  • a deflection plate 26 is arranged in the interior of the tube, through which the carrier gas stream loaded with heating oil droplets is deflected against the inner wall of the tube 25, so that larger drops are thrown against the wall or drops impinging on the deflection surface 26 run together to form larger drops and collect on the bottom of the tube 25, preferably with the device arranged horizontally.
  • the wall in the front part of the mixing chamber 1 is first heated via the heating device 18, so that the part of the liquid droplets striking the wall is evaporated and burned by the combustion air together with the finest droplets as an oil-steam-air mixture the pipe 25 is guided.
  • the mouth 27 of the tube 25 is provided in a manner not shown with a flame holder, so that the tube end also forms the burner.
  • the pipe 25 heats up, so that the heat conduction of the pipe material also heats up the part of the pipe wall surrounding the heating oil inlet area of the mixing chamber 1 and accordingly the heating device 18 can be switched off.
  • Fig. 4 shows a modified embodiment for a heating oil burner.
  • the spray jet 6 is introduced into a mixing chamber 1 which is closed on all sides and into which at least part of the required combustion air is introduced via corresponding inlets 5 coaxially with the atomizing nozzle 2.
  • the spray jet 6 is directed against a deflecting surface 10 provided with heating elements, so that only the carrier gas stream loaded with the finest drop fraction can escape via the outlets 21 arranged laterally and at a distance from the deflecting surface 10.
  • the liquid portion that strikes there is evaporated in accordance with the heating power applied and likewise carried away by the carrier gas stream via the outlets 21.
  • the unevaporated liquid portion is drawn off from the mixing chamber 1 via an outlet 13 arranged in the bottom region.
  • the device is arranged in a flow channel 28 which carries the entire air requirement for the combustion.
  • a corresponding air inlet 29 the part of the combustion air required for the mixing process and introduced via the feed lines 5, preferably dimensioned as the primary air quantity, is branched off from the total air flow, so that the air quantity flowing in the remaining partial duct 30 forms the secondary air quantity, which, however, is in the range the outlets 21 again mixes with the primary air enriched with heating oil vapor, so that a combustible mixture is again present in the outlet region 31 of the flow channel 28.
  • Fig. 5 shows an embodiment as it is specifically intended for the atomization of heating oil.
  • the structure corresponds essentially to the arrangement acc. Fig. 2, so that reference is made to this.
  • the nozzle 2 is designed as a Venturi nozzle, which is pressurized with air at a pressure of 200 to 400 mb via an air compressor 32.
  • the air volume flow is about 5% of the stoichiometric amount of air required for combustion.
  • the oil to be digested is introduced into the nozzle via the pipeline 3 by a feed pump 4 and entrained in the air and atomized in the process. Due to the expanding air jet, the droplets are torn outwards and sprayed as a heatable open-pored contact surface wall 23 of the mixing chamber 1, so that the impinging liquid components are evaporated into the carrier gas stream.
  • a fume hood 13 is provided, which is connected to the pipeline 3 via a valve 33, so that the coarse drops which have not been evaporated and separated in the deflection chamber 22 during the deflection can be mixed as a small amount of liquid into the freshly supplied amount of heating oil.
  • a wiper rotor 34 is inserted into the mixing chamber 1 and is provided with at least two rotor blades 35 which end at a short distance from the wall 23 of the contact surface of the mixing chamber 1.
  • the wiper rotor 34 is only indicated schematically and can be designed differently in its structural configuration than is shown in the drawing.
  • the wiper rotor is driven by a motor 36.
  • the heating oil to be atomized is applied to the wiper blades 35 via nozzle openings 2 and thrown radially outwards against the wall 23 so that practically the entire injected quantity hits the heatable open-pore contact surface and is evaporated there.
  • the liquid to be atomized is thrown outwards in the form of a thin film or a strand of film, so that even the finest droplets hit the contact surface from the outer edge of the wiper blades, so that very rapid evaporation can take place in the manner described above.
  • the nozzle openings 2 can also open out from the rotor shaft 2 at an angle with respect to the plane of the wiper blades, so that atomization in droplet form initially takes place in the space between two adjacent wiper blades.
  • the finest droplets are carried along by the carrier gas flow, while the coarser droplets are gripped by the surfaces of the wiper blades and, as already described above, are ejected onto the contact surface after film-like distribution on the wiper blade surface.
  • the wiper blades can be straight, but also helical in relation to the axis of rotation. Alignment in the case of a helical course must be carried out in such a way that, based on the direction of rotation, the wiper blades simultaneously promote the carrier air introduced via the supply lines 5 in the direction of flow. lg-ks

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Cosmetics (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Gas Separation By Absorption (AREA)

Claims (18)

  1. Procédé de production d'un brouillard de liquide transportable dans un courant gazeux porteur, dans lequel le liquide est pulvérisé sous forme d'un ensemble de gouttes un courant gazeux porteur, l'ensemble de gouttes est dévié dans le courant gazeux porteur et, dans la zone de déviation, des gouttes de l'ensemble de gouttes qui excédent une grosseur maximale sont séparées du courant gazeux porteur, caractérisé en ce qu'au moins une partie de l'ensemble gouttes, en particulier la partie des gouttes excédant une grosseur maximale, est reçue par au moins une surface de contact pouvant être chauffée et est évaporée, au moins en partie, dans le courant gazeux porteur.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'au moins une partie des quantités de gouttes à évaporer est reçue et évaporée dans la zone de pulvérisation par une surface de contact pouvant être chauffée.
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce qu'au moins une partie des quantités de gouttes a evaporer est reçue et évaporée dans la zone de déviation par une surface de contact pouvant être chauffée.
  4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce que la quantité de gouttes à évaporer est reçue par la surface d'un élément de contact à pores ouverts, servant de surface de contact, est chauffée à température d'ébullition dans l'élément de contact et est réintroduite dans le courant gazeux porteur. par la surface de contact, sous forme de mélange gouttes-vapeur.
  5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce que la quantité de gouttes séparées du courant gazeux porteur et regroupées en un retour est conduite à travers un échangeur de chaleur et livre sa chaleur au liquide circulant vers la pulvérisation.
  6. Procédé suivant l'une des revendications 1 à 5, caractérisé en ce que le courant gaz eux porteur est chauffé avant d'être introduit dans la zone de pulvérisation.
  7. Dispositif de production d'un brouillard de liquide transportable dans un courant gazeux porteur, en particulier destiné à la mise en oeuvre du procédé suivant les revendications 1 à 6, avec une chambre de mélange (1) qui est munie d'au moins une entrée (5) pour un courant gazeux porteur, d'au moins une tuyère de pulvérisation (2) pour l'introduction, d'un fluide sous forme d'ensemble de gouttes et d'au moins une sortie pour le courant gazeux porteur chargé du brouillard de liquide, la chambre de mélange (1) étant pourvue, à une distance de l'embouchure de la tuyère, d'une surface de déviation (10) pour la part de courant gazeux porteur chargé de l'ensemble de gouttes à laquelle se raccorde la sortie pour le courant gazeux porteur chargé du brouillard de liquide et une bonde (13) étant prévue pour les quantités de gouttes séparées et regroupées en un liquide de retour, caractérisé en ce que la paroi de la chambre de mélange (1) présente une surface de contact qui est reliée à un dispositif de chauffage (18).
  8. Dispositif suivant la revendication 7, caractérisé en ce que la surface de déviation (10) constitue une surface de contact et est reliée à un dispositif de chauffage (18).
  9. Dispositif suivant l'une des revendications 7 ou 8, caractérisé en ce que la surface de déviation (10) est constituée par un élément de déviation (17, 26) disposé dans le courant gazeux porteur.
  10. Dispositif suivant l'une des revendications 7 à 9, caractérisé en ce que la surface de contact est constituée par la surface d'un élément de contact à pores ouverts qui, dans sa zone opposée à la surface de contact. est relie à un dispositif de chauffage (18), de préférence électrique.
  11. Dispositif suivant l'une des revendications 7 à 10, caractérisé en ce que la chambre de mélange (1) est pourvue, à l'endroit de la tuyère, d'au moins, d'un orifice d'entrée (5), orienté de préférence en direction du jet (6), pour au moins une partie du courant gazeux porteur.
  12. Dispositif suivant les revendications 7 à 11, caractérisé en ce que la tuyère (2) se présente sous forme d'une tuyère à venturi et est reliée à une amenée (5) d'air comprimé destiné à soutenir la pulvérisation.
  13. Dispositif suivant l'une des revendications 7 à 12, caractérisé en ce que la chambre de mélange (1) se présente sous forme tubulaire et est disposée coaxialement à la tuyère (2), que l'extrémité (24) de la chambre de mélange (1) opposée à la tuyère (2) débouche dans une chambre de déviation (22) et que la paroi de la chambre de déviation (22) opposée à l'embouchure de la chambre de mélange (1) se présente sous forme de surface de déviation (10).
  14. Dispositif selon la revendication 13, caractérisé en ce que la chambre de déviation (22) entoure de manière coaxiale la chambre de mélange (1) tubulaire et en ce que la sortie (21) pour le courant gazeux porteur chargé de brouillard de liquide est disposée, à contre-courant du jet (6), à distance de l'embouchure de la chambre de mélange (1), dans la chambre de déviation (22).
  15. Dispositif selon la revendication 13 ou 14, caractérisé en ce qu'un rotor d'essuyage (34) est disposé dans la chambre de mélange (1) tubulaire, lequel rotor est associé à la tuyère de pulvérisation (2).
  16. Dispositif selon la revendication 15, caractérisé en ce que le rotor d'essuyage (34) est muni d'au moins deux plaques d'essuyage (35) s'étendant radialement, vers lesquelles débouche respectivement au moins un orifice de tuyère.
  17. Dispositif selon l'une des revendications 7 à 16, caractérisé en ce qu'une soupape de décharge (14), à réglage automatique en fonction de la pression dans la canalisation (3) d'amenée de fluide, est disposée dans la région de la bonde (13) pour le liquide de retour.
  18. Dispositif selon l'une des revendications 7 à 17, caractérisé en ce qu'un échangeur de chaleur (16) est disposé dans la région de la bonde (13) pour le liquide de retour, lequel échangeur se trouve dans le liquide de retour et est traversé par le liquide parvenant à la tuyère (2) de pulvérisation.
EP90111617A 1989-06-29 1990-06-20 Procédé de production d'un bouillard transportable dans un courant gazeux et dispositif de mise en oeuvre Expired - Lifetime EP0405311B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90111617T ATE100924T1 (de) 1989-06-29 1990-06-20 Verfahren zur erzeugung eines in einem traegergasstrom foerderbaren fluessigkeitsnebels und vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921255 1989-06-29
DE3921255A DE3921255A1 (de) 1989-06-29 1989-06-29 Verfahren zur erzeugung eines in einem traegergasstrom foerderbaren fluessigkeitsnebels und vorrichtung zur durchfuehrung des verfahrens

Publications (2)

Publication Number Publication Date
EP0405311A1 EP0405311A1 (fr) 1991-01-02
EP0405311B1 true EP0405311B1 (fr) 1994-01-26

Family

ID=6383826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90111617A Expired - Lifetime EP0405311B1 (fr) 1989-06-29 1990-06-20 Procédé de production d'un bouillard transportable dans un courant gazeux et dispositif de mise en oeuvre

Country Status (7)

Country Link
US (1) US5261949A (fr)
EP (1) EP0405311B1 (fr)
JP (1) JPH04500721A (fr)
AT (1) ATE100924T1 (fr)
CA (1) CA2035436A1 (fr)
DE (2) DE3921255A1 (fr)
WO (1) WO1991000479A1 (fr)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5601688A (en) * 1990-02-14 1997-02-11 Ormat Industries Ltd. Method of and means for spraying droplets
DE4231480A1 (de) * 1992-09-20 1993-04-15 Thomas Von Dipl Ing Kahlden Verfahren und vorrichtung zur erzeugung von kontaminationsarmen nebel
FR2718739B1 (fr) * 1994-04-13 1996-07-19 Claude Walter Dispositif pour générer de la fumée par réchauffement de glace carbonique.
ES2224273T3 (es) 1996-09-30 2005-03-01 University Of Arkansas Metodo para producir inmunidad activa por medio de un conjugado de vacuna.
BE1010763A3 (nl) * 1996-11-22 1999-01-05 Vereniging Voor De Bevordering Werkwijze en inrichting voor het genereren van druppels.
US6012647A (en) * 1997-12-01 2000-01-11 3M Innovative Properties Company Apparatus and method of atomizing and vaporizing
US6045864A (en) * 1997-12-01 2000-04-04 3M Innovative Properties Company Vapor coating method
US7569180B2 (en) 2004-10-12 2009-08-04 Ethicon, Inc. Sterilization system and method and orifice inlet control apparatus therefor
US6852279B2 (en) * 2002-06-28 2005-02-08 Ethicon, Inc. Sterilization with temperature-controlled diffusion path
GB0005231D0 (en) * 2000-03-03 2000-04-26 Boc Group Plc Abatement of semiconductor processing gases
DE10035731A1 (de) * 2000-07-22 2002-01-31 Climarotec Ges Fuer Raumklimat Vorrichtungen und Verfahren zur Durchmischung von Flüssigkeit und Gas
US6761109B2 (en) 2001-03-28 2004-07-13 The Boc Group, Inc. Apparatus and method for mixing a gas and a liquid
US7008658B2 (en) * 2002-05-29 2006-03-07 The Boc Group, Inc. Apparatus and method for providing treatment to a continuous supply of food product by impingement
US20030228401A1 (en) * 2002-06-06 2003-12-11 Newman Michael D. System and method of using non-volatile microbiocidal application agents
ES2269924T3 (es) * 2002-06-28 2007-04-01 Ethicon, Inc. Sistema y metodo de esterilizacion con vaporizador/condensador que funciona con bomba de calor.
ITPG20040015A1 (it) * 2004-05-10 2004-08-10 Fabrizio Ramaccioni Camera di miscelazione per applicazione di un agente disinfettante tramite vapore e relativo dispositivo igienizzante
DE102005013703B4 (de) * 2005-03-24 2014-08-14 Heinz Karle Verfahren und Vorrichtung zum Erzeugen eines Aerosols
DE102005023483A1 (de) * 2005-05-21 2006-11-30 Diehl Bgt Defence Gmbh & Co. Kg Schutzsystem zum Tarnen von Gebäudedachflächen
WO2007000330A2 (fr) 2005-06-29 2007-01-04 Boehringer Ingelheim International Gmbh Procede et dispositif d'atomisation de liquide
EP1945154B1 (fr) * 2005-10-12 2015-03-04 Össur hf Attelle de genou
DE102006016286B4 (de) * 2006-04-03 2009-03-12 Karl-Heinz Dräger Verfahren und Anlage zum Verteilen und Austragen eines Reiz- oder Kampfstoffes
CN102449508B (zh) 2009-04-15 2014-12-17 3M创新有限公司 光学膜
WO2010120468A1 (fr) 2009-04-15 2010-10-21 3M Innovative Properties Company Procédé et appareil pour un article nanoporeux
US9291752B2 (en) 2013-08-19 2016-03-22 3M Innovative Properties Company Retroreflecting optical construction
US9464179B2 (en) 2009-04-15 2016-10-11 3M Innovative Properties Company Process and apparatus for a nanovoided article
IN2011CN07418A (fr) 2009-04-15 2015-08-21 3M Innovative Properties Co
AT508319A1 (de) * 2009-05-20 2010-12-15 Mittermayr Alexander Verfahren zur aromabehandlung eines in einer verpackung vorgesehenen lebensmittels
KR20130092396A (ko) 2010-04-15 2013-08-20 쓰리엠 이노베이티브 프로퍼티즈 캄파니 광학적 활성 영역 및 광학적 불활성 영역을 포함하는 재귀반사성 물품
CN102858528B (zh) 2010-04-15 2016-05-11 3M创新有限公司 包括光学活性区域和光学非活性区域的回射制品
JP6046605B2 (ja) 2010-04-15 2016-12-21 スリーエム イノベイティブ プロパティズ カンパニー 再帰反射性物品を形成する方法
ES2387347B1 (es) 2012-07-20 2013-08-16 Europea De Servicios E Higiene Euro-Servhi, S.A. Nebulizador ambientador y procedimiento
CN104833272B (zh) * 2015-04-30 2016-06-22 西南大学 一种烟雾发生装置
BE1023919B1 (nl) * 2016-02-25 2017-09-13 Ifire Bvba Verbeterde bio-ethanol haard
CN105901775A (zh) * 2016-06-03 2016-08-31 深圳市合元科技有限公司 喷射式雾化装置
RU2650252C1 (ru) * 2017-07-07 2018-04-11 Олег Савельевич Кочетов Вихревая испарительно-сушильная камера
CN107747544B (zh) * 2017-11-07 2019-07-09 苏州英华特涡旋技术有限公司 一种带均油管的压缩机、并联式压缩机组及均油方法
RU185017U1 (ru) * 2018-07-11 2018-11-16 Владимир Иванович Савин Биокамин с электронным управлением
CN109358166B (zh) * 2018-11-21 2024-03-12 上海市计量测试技术研究院 餐饮油的雾化发烟调节装置
US20210009548A1 (en) * 2019-07-11 2021-01-14 Fog Atomic Technologies Llc Burst atomization fractionation system, method and apparatus
CN111701369A (zh) * 2020-05-25 2020-09-25 青岛信达商砼有限公司 混凝土搅拌站喷淋降尘系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271100A (en) * 1979-06-18 1981-06-02 Instruments S.A. Apparatus for producing an aerosol jet

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1422839A (en) * 1919-09-03 1922-07-18 B F Sturtevant Co Method of humidifying air
US3142548A (en) * 1961-03-30 1964-07-28 Svenska Flaektfabriken Ab Wet-cleaning of gases
AT254834B (de) * 1963-10-08 1967-06-12 Waagner Biro Ag Verfahren und Einrichtung zur Ausscheidung von in Gasen feinverteilter Materie
GB1070358A (en) * 1965-04-10 1967-06-01 Cammell Laird & Company Shipbu Improvements in or relating to marine platforms, sea stations and the like
US3336734A (en) * 1965-05-18 1967-08-22 Schultz Converter Co Fuel vaporizing assembly
US4141701A (en) * 1975-11-28 1979-02-27 Lone Star Steel Company Apparatus and process for the removal of pollutant material from gas streams
US4284609A (en) * 1977-07-11 1981-08-18 Quad Environmental Technologies Corp. Condensation cleaning of particulate laden gases
US4252543A (en) * 1979-07-25 1981-02-24 General Electric Company Process for quenching and cleaning a fuel gas mixture
US4810268A (en) * 1985-11-07 1989-03-07 Ppg Industries, Inc. Apparatus and method of washing air
US5004484A (en) * 1988-08-31 1991-04-02 Barrett, Haentjens & Co. Air stripping of liquids using high intensity turbulent mixer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271100A (en) * 1979-06-18 1981-06-02 Instruments S.A. Apparatus for producing an aerosol jet

Also Published As

Publication number Publication date
JPH04500721A (ja) 1992-02-06
ATE100924T1 (de) 1994-02-15
EP0405311A1 (fr) 1991-01-02
DE3921255A1 (de) 1991-01-03
WO1991000479A1 (fr) 1991-01-10
CA2035436A1 (fr) 1990-12-30
US5261949A (en) 1993-11-16
DE59004385D1 (de) 1994-03-10

Similar Documents

Publication Publication Date Title
EP0405311B1 (fr) Procédé de production d'un bouillard transportable dans un courant gazeux et dispositif de mise en oeuvre
EP0170715B1 (fr) Dispositif de pulvérisation
EP1585601B1 (fr) Procede et buse de pulverisation permettant de projeter des gouttes de liquide dans un flux de gaz
DE1557044B2 (de) Vorrichtung zum dispergieren einer fluessigkeit in ein gas foermiges medium
EP0405481B1 (fr) Dispositif pour pulvériser un fluide
EP0711953B1 (fr) Brûleur à prémélange
DE3942042A1 (de) Brennkammer fuer eine gasturbine mit luftunterstuetzten brennstoffzerstaeuberduesen
AT519865B1 (de) Vorrichtung zur Herstellung von Effektnebel
DE2511171C2 (de) Filmverdampfungs-Brennkammer
EP1470864A2 (fr) Buse de pulvérisation à deux fluides
DE102006031867A1 (de) Brennervorrichtung
DE3132352A1 (de) "zweiwegbrennstoffduese"
EP1195203B1 (fr) Dispositif et procédé de pulvérisation électrostatique de liquides
DE2159909A1 (de) Verfahren und Luftfahrzeug zum Versprühen von landwirtschaftlichen Nutzstoffen
EP3429756B1 (fr) Dispositif de traitement de l'air
DE3038063C2 (de) Ölbrenner
DE1049548B (de) I Verfahren und Vorrichtung zur Herstellung von Faden oder Fasern aus in der Warme erweichbaren Mineralien
DE2925026A1 (de) Verfahren und vorrichtung zum befeuchten von faserbahnen, insbesondere papierbahnen
DE908600C (de) Zerstaeuber fuer Fluessigkeiten und Fluessigkeitsgemische
DE622123C (de) Einrichtung zum stufenweisen Zerstaeuben von Fluessigkeiten mittels eines umlaufenden Fliehkraftzerstaeubers in dampf- oder gasfoermigen Stoffen
DE519222C (de) Zerstaeubungsverfahren nebst Vorrichtung dazu
DE19856169A1 (de) Verfahren und Vorrichtung zum Zerstäuben eines flüssigen Mediums
DE10024977B4 (de) Brenner für einen ein flüssiges Medium umfassenden Brennstoff
DE102004019970B4 (de) Anordnung und Verfahren zum Einbringen eines Fluids in ein Arbeitsmedium einer Gasturbinenanlage mit einem Verdichter
DE1557044C (de) Vorrichtung zum Dispergieren einer Flüssigkeit in ein gasförmiges Medium

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19910605

17Q First examination report despatched

Effective date: 19920717

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19940126

Ref country code: DK

Effective date: 19940126

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19940126

Ref country code: NL

Effective date: 19940126

Ref country code: BE

Effective date: 19940126

Ref country code: SE

Effective date: 19940126

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19940126

REF Corresponds to:

Ref document number: 100924

Country of ref document: AT

Date of ref document: 19940215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59004385

Country of ref document: DE

Date of ref document: 19940310

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940503

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940620

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940630

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040607

Year of fee payment: 15

Ref country code: GB

Payment date: 20040607

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040618

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20040623

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050620

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060103

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060228

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050620

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060228