EP0674941A1 - Dispositif pour la fabrication d'une émulsion huile-eau - Google Patents

Dispositif pour la fabrication d'une émulsion huile-eau Download PDF

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Publication number
EP0674941A1
EP0674941A1 EP95103495A EP95103495A EP0674941A1 EP 0674941 A1 EP0674941 A1 EP 0674941A1 EP 95103495 A EP95103495 A EP 95103495A EP 95103495 A EP95103495 A EP 95103495A EP 0674941 A1 EP0674941 A1 EP 0674941A1
Authority
EP
European Patent Office
Prior art keywords
chamber
swirl chamber
inlet
return
opening
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
EP95103495A
Other languages
German (de)
English (en)
Other versions
EP0674941B1 (fr
Inventor
Georg Donauer
Dieter Dipl.-Ing. Schönfeld
Tobias Dipl.-Ing. Männle
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
MTU Motoren und Turbinen Union Friedrichshafen 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 MTU Friedrichshafen GmbH, MTU Motoren und Turbinen Union Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP0674941A1 publication Critical patent/EP0674941A1/fr
Application granted granted Critical
Publication of EP0674941B1 publication Critical patent/EP0674941B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/23—Mixing by intersecting jets
    • 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
    • B01F25/40—Static mixers
    • B01F25/44—Mixers in which the components are pressed through slits
    • B01F25/441—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits
    • B01F25/4413—Mixers in which the components are pressed through slits characterised by the configuration of the surfaces forming the slits the slits being formed between opposed conical or cylindrical surfaces
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/41—Emulsifying

Definitions

  • the invention relates to a device for forming an oil-water emulsion for the operation of an injection pump with the features described in the preamble of claim 1.
  • Such emulsifiers mix the oil and the water to form an emulsion in which the smallest water droplets are suspended in the diesel oil. If such oil-water emulsions are injected into the combustion chamber of an internal combustion engine, the combustion temperature and, as a result, the soot and nitrogen oxide content in the exhaust gas can be reduced.
  • the invention is therefore based on the technical problem, starting from a generic emulsifying device, to show a device which forms a fine, homogeneous emulsion with purely fluid-mechanical means, is simple to construct and can be produced inexpensively.
  • An advantage of the arrangement according to the invention of the baffle surface coaxially opposite the water injection nozzle in the swirl chamber is that the water jet injected under high pressure into the swirl chamber at high speed strikes the baffle surface axially, thereby causing the supplied water mass flow in the swirl chamber to be set into a highly turbulent flow .
  • This vortex flow generated according to the invention mixes with the fuel supplied in a plane perpendicular to the direction of the water injection jet over the circumference of the vortex chamber without additional energy supply from the outside to form a fine emulsion.
  • the turbulent water-oil mixture in the collision space of the swirl chamber is additionally circulated and with the inflowing oil, such as. B. fuel swirled.
  • This admixture of fuel to the high-energy and highly turbulent water flow achieves a uniformly good mixing of the smallest water and fuel-oil droplets.
  • the flow or swirling energy required to form such a homogeneous emulsion is applied according to the invention solely by using the energy potential of the injection jets, so that a previously required additional energy supply from the outside, for example in the form of a driven radial impeller, can be dispensed with, without thereby affecting the quality to affect the emulsion to be produced.
  • the circulation flow supported by the fuel addition can be made unhindered for a fine distribution of both emulsion substances.
  • This swirling can be further intensified if, as in a preferred embodiment, an even number of injection openings is provided, two of which are coaxially opposite each other.
  • the injection jets which lie on a common diameter line and are directed inwards in the radial direction, inevitably meet head-on in your central point and thus optimize the swirling of the emulsion liquids into extremely fine droplets.
  • the axial distance between the baffle and the injection nozzle can be adjusted, in order thereby to apply the emulsifying device to the to match the injection pressure conditions and the desired droplet size of the emulsion to be produced.
  • a further advantage here is provided by the embodiment of the invention according to claim 4, in which the structural design for fastening the baffle plate is laid in the flow direction of the emulsifier. A disturbance in the emulsified throughput by the device according to the invention is thus avoided. At the same time, this configuration additionally creates the prerequisite for a possibility of adjusting the distance of the impact surface to the injection nozzle from outside the device according to the invention, that is to say without complex, partial disassembly.
  • a suitable embodiment is the subject of claim 5.
  • the return of the emulsion coming from the injection pump in a return line to the emulsion circuits has been found to be the cause of a non-consistently homogeneous emulsion formation.
  • the unused emulsion portion returns directly to the circuit via the suction chamber of the radial impeller and thus leads to local changes in the concentration of the oil-water premix that flows into the suction chamber through the tapered outlet of the swirl chamber.
  • a backflow-related backflow into the swirl chamber and an associated inadequate mixing of water and oil can result.
  • an embodiment is shown in claim 6 in a further development of the invention, the advantage of which is that the return emulsion is first collected in a feed channel and over the entire circumference the mixing chamber is distributed before it is mixed through a backflow channel into the emulsification circuit and thus into the freshly produced emulsifier. In this way, the return emulsified is led into the area of the connection opening, where the emulsified flow coming from the swirl chamber flows into the mixing chamber at high speed due to the nozzle effect at the connection opening.
  • the device according to the invention is also characterized by an extremely low pressure volume, since its chamber system is matched to a continuous emulsion volume flow in terms of fluid mechanics and has no partial volumes lying in the flow shadow.
  • connection flanges 30, 32, 34 and line couplings 31, 33, 35 connected to the respective inlets 3, 7 and outlet 6 for better understanding of the structure and function .
  • the device itself essentially consists of a housing 48, a chamber system 1, 2, 19 formed in the housing 48, the oil, water and return flow systems as well as an impact ram assembly 13 with adjustment mechanism 14.
  • the housing 48 is made of four machined and screwed together coaxially ro tion-symmetrical housing parts 36, 37, 38, 39 assembled and encloses a rotationally symmetrical axial passage opening.
  • the subdivision of the housing 48 is chosen so that the constructive design of each of the housing parts 36, 37, 38, 39 respectively the mutually facing and screwed end faces of two housing parts 36, 37, 38, 39 divide the through hole into three chamber sections.
  • a nozzle insert 26 is inserted coaxially, by means of which a rotationally symmetrical swirl chamber 1 is separated from the subsequent chamber sections.
  • the shape of this swirl chamber 1 is limited by a cylindrical collision space 27 formed in the housing part 36 and the inner diameter of the nozzle insert 26 which is smaller in diameter and adjoining it in the direction of flow 25.
  • inlet openings 9 which are formed in a plane perpendicular to the longitudinal axis 28 of the vortex chamber, open into the collision space 27 at uniform angular intervals over the circumference.
  • the inlet opening 9 does not necessarily have to be arranged at uniform angular intervals; rather, these inlet openings can also be provided distributed irregularly over the circumference, in order to thereby achieve an additional flow control.
  • the inlet openings 9 connect the swirl chamber 1 to an annular channel 8 which is arranged coaxially around it on the outer wall of the housing.
  • This annular channel 8 is delimited by an annular housing 29 which is preferably welded to the outer wall of the housing or screwed onto it and serves as a compensation volume for the oil or fuel supply to the device according to the invention.
  • the volume of the ring channel 8 and the total opening cross-section of the inlet openings 9 are coordinated with one another in such a way that, based on the intended delivery rate of a fuel supply pump, ensures that all inlet openings 9 are supplied with a sufficient amount of fuel without the need for supplying the injection pump Fuel flow is limited in any way.
  • connection flanges 30, 30 ' Radially on the ring housing 29 there are one or more connection flanges 30, 30 ', each of which connects one or more fuel low pressure lines (not shown) connected to the ring channel 8 via a diesel inlet 3 by means of line couplings 31. If, as shown in the exemplary embodiment shown, a plurality of connection flanges 30, 30 'are formed, then only the connection flange which is favorable under the prevailing installation conditions can be connected to the fuel supply line, while the remaining line flanges 30' can be closed by means of threaded plugs 40.
  • the end face of the swirl chamber 1 facing your housing part 26 is defined by a water injection valve 4, which is screwed into the front end of the housing passage opening and whose injection nozzle 5 opens into the swirl chamber 1.
  • An electromagnetic valve is used as the water injection valve 4, against which a water delivery pump (not shown here) conveys water and builds up a selected dynamic pressure.
  • the water injection valve 4 is opened and closed by means of corresponding electrical control pulses from a control unit, also not shown, and water is injected under pressure through the injection nozzle 5 into the swirl chamber 1.
  • the electromagnetic injection valve 4 is distinguished by a fast and precise opening and closing behavior, as a result of which even high-frequency intermittent injection can be controlled precisely.
  • the injection nozzle 5 of the water injection valve 4 opens coaxially into the swirl chamber 1 and guides the water injection jet essentially likewise coaxially into the swirl chamber 1. There, the injection jet hits a baffle surface 10 of a baffle plate 11, which is in a plane perpendicular to the water injection direction the swirl chamber 1 is arranged.
  • the baffle surface 10 is positioned at a distance from the water injection nozzle 5, which on the one hand allows the radially oriented oil or fuel injection jets from the inlet openings 9 to meet each other freely in the horizontal center of the swirl chamber, and on the other hand the water injection jet in the vertical direction therethrough
  • the center of the chamber and the quantities of fuel that meet there radially are sprayed through against the baffle surface 10 and the water spraying again from the baffle surface 10 is at least partially directed back into the inlet end section 27 against the water injection direction.
  • the baffle plate 11 forms the front end of an impact ram 12, which is connected to an adjusting mechanism 14 and from the front side of the housing part 39 coaxially through the cam mer system, which is described in more detail below, extends into the swirl chamber 1.
  • the end of the impact ram 13 is guided through a nozzle opening 22 which is formed with a corresponding diameter centrally in the bottom of the nozzle insert 26.
  • the invention is not limited to the design of the baffle plate attachment shown in this embodiment, but it can, as for. B. in the embodiments of the invention shown in FIG. 3, an impact ram 13 'can be fastened in its position in the housing part 39' without an adjustment mechanism;
  • An insert body suitable for positioning the impact surface 10 is also conceivable, which is inserted into the nozzle insert 26 but does not hinder the emulsification flowing through. In the embodiment shown in FIG. 1 with adjusting mechanism 14, this is inserted with a precise fit into a corresponding receiving bore 18 in the housing part 39 and is fixed in position on the flange 16 by means of a clamping nut 15.
  • the adjustment mechanism 14 is composed of a sliding piece 41 with an internal fine thread and a threaded bolt screwed into the fine thread.
  • the threaded bolt is connected in a rotationally fixed manner to the end of the impact piston 12 facing away from the baffle plate 11 and has a handle part 17 protruding from the housing part 19, with which the impact piston 12 can be moved in the axial direction to adjust the baffle surface distance.
  • the person skilled in the art is familiar with a large number of different length adjustment mechanisms, which should likewise be covered by the scope of protection of the present invention.
  • a taper 42 is formed on the inner edge of the sleeve, the slope of which is selected so that it radially pushed beyond the baffle plate 11 Water or water-oil mixture is partially directed to the slope and can flow back towards the injection nozzle 5 into the inlet end section 27.
  • this taper 42 acts as an acceleration ring channel for the emulsion stream flowing out of the collision chamber 27 into the adjacent part of the swirl chamber 1. The accelerating effect of this taper 42, as well as the nozzle opening 22, supports the hydrodynamic distribution of the finest water and fuel particles among one another.
  • the vortex chamber 1 is connected in the flow direction 25 via the nozzle opening 22 to the subsequent chamber system, which comprises a mixing chamber 2 and a collecting chamber 19.
  • the mixing chamber 2 is delimited by the inner wall of an insert sleeve 43 inserted into the chamber section 45 formed by the housing parts 37 and 38 and the section of the passage opening of the same diameter in the housing part 38 and opens downstream into the larger-diameter suction chamber 19 via a divergent transition 44.
  • a collar 46 is formed on the insert sleeve 43 at its downstream end, in the direction of flow 25, with which it is axially supported against an inner shoulder of the housing parts 37 and 38, respectively.
  • the outer diameter of the insert sleeve 43 is dimensioned such that a return flow channel 24 in the form of a hollow cylinder is delimited by the inner wall of the chamber section 46 and the outer sleeve wall.
  • the axial length of the insert sleeve 43 is dimensioned smaller than the length of the chamber section 45, so that the return flow channel 24 is connected to the mixing chamber 2 via a radial opening 23 extending over the entire circumference of the sleeve at the emulsion transition area between the swirl chamber 1 and the mixing chamber 2.
  • a feed channel 20 is also formed in the housing part 38, which is toroidal and coaxially surrounds the mixing chamber 2.
  • a return inlet 7 opens radially, to which a return line (not shown) coming from the injection pump is connected with a line coupling 33 arranged laterally on a ring piece 38a.
  • the ring piece 38a is screwed onto the housing part 38 and forms the outer boundary of the feed channel 20 in the radial direction 38a.
  • the emulsate returned to the emulsifying device in this return line first reaches the toroidal feed channel 20 and then flows against the flow direction 25 through the return flow channel 24 up to the radial opening 23 into the passage area of the nozzle opening 22.
  • the return flow path through which the return emulsate has to flow before it is mixed into the emulsate stream the return flow is subjected to multiple changes of flow direction, whereby flow turbulence is generated in each case, which causes mixing of the return emulsate.
  • the emulsified stream flowing out of the swirl chamber 1 is accelerated as it passes and occurs at a high rate Flow rate in the mixing chamber 2. Due to the high flow rate of the emulsifier, a negative pressure is generated in this transition area. This negative pressure initially causes a turbulent swirling of the emulsified flow in the mixing chamber 2; but it also has the effect that the return emulsifier fed in through the return line is sucked in through the radial opening 23 and entrained by the emulsifier stream.
  • FIG. 3 shows the device according to the invention as it is screwed into a bottle 50 of a manifold 49 and is conductively connected to the latter via an outlet opening 51.
  • the housing part 39 ' is modified compared to the embodiment shown in Figures 1 and 2 and opened in the axial direction.
  • the impact ram 13' is inserted and fixed.
  • the impact ram 13 ' is formed with a ram base 53 which is clamped between your stop 53 and the shoulder 55.
  • the plunger base 53 has a plurality of bores 54 aligned in the flow direction 25, through which the fuel-water emulsion formed can flow through the outlet opening 51 into the collecting line 49.
  • the volume flow can be adapted to the needs of different consumers.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)
EP95103495A 1994-03-12 1995-03-10 Dispositif pour la fabrication d'une émulsion huile-eau Expired - Lifetime EP0674941B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4408392A DE4408392A1 (de) 1994-03-12 1994-03-12 Vorrichtung zur Bildung einer Öl-Wasser-Emulsion
DE4408392 1994-03-12

Publications (2)

Publication Number Publication Date
EP0674941A1 true EP0674941A1 (fr) 1995-10-04
EP0674941B1 EP0674941B1 (fr) 1997-10-29

Family

ID=6512604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103495A Expired - Lifetime EP0674941B1 (fr) 1994-03-12 1995-03-10 Dispositif pour la fabrication d'une émulsion huile-eau

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EP (1) EP0674941B1 (fr)
DE (2) DE4408392A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953760A1 (fr) * 1998-04-30 1999-11-03 Günther Kramb Dispositif de dosage pour une installation de production d'une émulsion
WO2006053712A3 (fr) * 2004-11-17 2006-08-31 Basf Ag Procede de production de formulations liquide-liquide a fines particules et dispositif permettant de mettre en oeuvre ce procede
CN111467987A (zh) * 2020-04-30 2020-07-31 上海迈克孚生物科技有限公司 一种超大流量金刚石交互容腔均质处理器
CN115646339A (zh) * 2022-12-13 2023-01-31 湖南金石智造科技有限公司 一种制药用混合装置及其混合效果检测方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917156B4 (de) * 1999-04-16 2006-01-19 INSTITUT FüR MIKROTECHNIK MAINZ GMBH Verfahren zur Herstellung einer Wasser-in-Dieselöl-Emulsion als Kraftstoff sowie dessen Verwendungen
PL4093535T3 (pl) 2020-01-23 2024-10-28 Raptech Eberswalde Gmbh Sposób wytwarzania stabilnej dyspersji węglowodorowo-wodnej w celu poprawy procesów spalania oraz dyspersji wodno-węglowodorowej, którą można łatwo rozdzielić na co najmniej dwie fazy w ramach procesu oczyszczania miejsca wypadku

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE464560C (de) * 1925-01-28 1928-08-21 Kurt Ranft Verfahren und Vorrichtung zum Mischen pulverfoermiger Stoffe
GB816093A (en) * 1956-08-23 1959-07-08 Bayer Ag Mixing apparatus
US3185448A (en) * 1963-06-03 1965-05-25 Urquhart S 1926 Ltd Apparatus for mixing fluids
US3540474A (en) * 1968-04-01 1970-11-17 Beckman Instruments Inc Rapid mixer
FR2115585A5 (en) * 1970-11-25 1972-07-07 Peugeot & Renault Gas-liquid emulsion generator - for foundry sand hardening agent
US4416225A (en) * 1981-08-07 1983-11-22 Albert Constantine Improvements relating to internal combustion engines
DE3912344A1 (de) * 1989-04-14 1990-10-18 Harrier Gmbh Einrichtung zum herstellen einer oel-wasser-emulsion
EP0421265A1 (fr) * 1989-10-02 1991-04-10 RITTERSHAUS & BLECHER GMBH Procédé et appareil pour mélanger une solution de flocculants avec de l'eau boueuse à filtrer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH610216A5 (fr) * 1975-11-04 1979-04-12 Mitsubishi Precision Co Ltd
DE3238149C2 (de) * 1982-10-14 1995-07-06 Brugger Inge Geb Ritzau Vorrichtung zum Zerstäuben von Flüssigkeiten
FR2665088B1 (fr) * 1990-07-27 1992-10-16 Air Liquide Procede et dispositif de melange de deux gaz.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE464560C (de) * 1925-01-28 1928-08-21 Kurt Ranft Verfahren und Vorrichtung zum Mischen pulverfoermiger Stoffe
GB816093A (en) * 1956-08-23 1959-07-08 Bayer Ag Mixing apparatus
US3185448A (en) * 1963-06-03 1965-05-25 Urquhart S 1926 Ltd Apparatus for mixing fluids
US3540474A (en) * 1968-04-01 1970-11-17 Beckman Instruments Inc Rapid mixer
FR2115585A5 (en) * 1970-11-25 1972-07-07 Peugeot & Renault Gas-liquid emulsion generator - for foundry sand hardening agent
US4416225A (en) * 1981-08-07 1983-11-22 Albert Constantine Improvements relating to internal combustion engines
DE3912344A1 (de) * 1989-04-14 1990-10-18 Harrier Gmbh Einrichtung zum herstellen einer oel-wasser-emulsion
EP0421265A1 (fr) * 1989-10-02 1991-04-10 RITTERSHAUS & BLECHER GMBH Procédé et appareil pour mélanger une solution de flocculants avec de l'eau boueuse à filtrer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953760A1 (fr) * 1998-04-30 1999-11-03 Günther Kramb Dispositif de dosage pour une installation de production d'une émulsion
WO2006053712A3 (fr) * 2004-11-17 2006-08-31 Basf Ag Procede de production de formulations liquide-liquide a fines particules et dispositif permettant de mettre en oeuvre ce procede
CN111467987A (zh) * 2020-04-30 2020-07-31 上海迈克孚生物科技有限公司 一种超大流量金刚石交互容腔均质处理器
CN115646339A (zh) * 2022-12-13 2023-01-31 湖南金石智造科技有限公司 一种制药用混合装置及其混合效果检测方法

Also Published As

Publication number Publication date
DE59500884D1 (de) 1997-12-04
DE4408392A1 (de) 1995-09-28
EP0674941B1 (fr) 1997-10-29

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