EP0196280A2 - Statischer Emulgierungsmischer für nichtmischbare Flüssigkeiten - Google Patents

Statischer Emulgierungsmischer für nichtmischbare Flüssigkeiten Download PDF

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Publication number
EP0196280A2
EP0196280A2 EP86830073A EP86830073A EP0196280A2 EP 0196280 A2 EP0196280 A2 EP 0196280A2 EP 86830073 A EP86830073 A EP 86830073A EP 86830073 A EP86830073 A EP 86830073A EP 0196280 A2 EP0196280 A2 EP 0196280A2
Authority
EP
European Patent Office
Prior art keywords
emulsifier
liquids
orifices
liquid
water
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.)
Withdrawn
Application number
EP86830073A
Other languages
English (en)
French (fr)
Other versions
EP0196280A3 (de
Inventor
Roberto Lissoni
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.)
STASER SpA Prodotti Petroliferi
Original Assignee
STASER SpA Prodotti Petroliferi
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 STASER SpA Prodotti Petroliferi filed Critical STASER SpA Prodotti Petroliferi
Publication of EP0196280A2 publication Critical patent/EP0196280A2/de
Publication of EP0196280A3 publication Critical patent/EP0196280A3/de
Withdrawn legal-status Critical Current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
    • F23K5/08—Preparation of fuel
    • F23K5/10—Mixing with other fluids
    • F23K5/12—Preparing emulsions
    • 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
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path

Definitions

  • This invention relates to a device for emulsifying water and liquids non mixable therewith. More particularly, the invention is concerned with a fluidic type static emulsifier to provide stable and finely dispersed emulsions of the water-in-oil type for boiler burners feeding.
  • An emulsifier apparatus that is based on the principle of forced outflow is comprised of an expansion compartment located immediately downstream of an orifice or narrow passage in order to subject the liquid flow to abrupt variations of pressure and velocity.
  • An upstream located compressor provides the pressure supply necessary for the flow of the liquid or liquids, in order to overcome the resistance opposed by the orifice, therefore violently projecting the flow of liquid inside the idle mass of the expansion compartment as well as against the opposite wall of said compartment, in order to take advantage of the resulting swirling motion.
  • the unsatisfactory quality of the resulting emulsions makes it necessary to resort to special low temperature heat exchangers as a replacement for existing ones; this being necessary in order to provide a remedy against dissociation of the two fluids due to vaporization of one of them.
  • the object of this invention is to provide a stable, finely dispersed emulsion, of the water-in-oil type, particularly suitable for use as a boiler burners fuel.
  • said stable emulsion is obtained using a flow emulsifier working under reduced pressure.
  • the emulsifier according to this invention substantially comprises a set of two or more expansion compartments, connected in series to each other through reduced area orifices acting as narrow passages.
  • a suction pump is provided downstream of the device, whereby the non mixable fluids to be emulsified are drawn from respective tanks in such a way as to make the combined flow of the two liquids to go through the sequence of compartments in series, so that it undergoes a number of subsequent compressions and expansions, as well as shocks against the compartment walls.
  • Downstream of the pump the emulsion thus obtained is subjected to the pushing action of the pump so that it is forwarded under pressure directly to the burner.
  • the device is comprised of an intake flange 1, an outlet flange 2, and identical elements 3 provided in between, each comprising an orifice 4 and an expansion compartment 5. Elements 3 are located such that the orifices 4 are alternatively axially offset in order to make the fluid flowing subsequently through them (right to left, in the drawing) to undergo a number of abrupt deflections.
  • the assembly is securely fastened together by a number of tie-rods 6 clamped at the ends thereof by nuts 7, while the sealing effect between adjacent elements is secured by means of suitable gaskets 8.
  • the intake flange 1 is provided with an axially disposed inlet fitting 9 for the liquid having higher viscosity (fuel), one or more radial inlet fitting 10 for the less viscous liquid (water), and one or more fittings 11 also radially disposed whose function will be better explained in the following, openings 12 being in addition provided both on the intake as well as on the outlet flange for the installation of monitoring pressure gauges.
  • a piping 13 is connected to inlet fitting 9 for supplying the fuel which is withdrawn from a tank 15 by means of a pump 14, while on the outlet fitting 2 a piping 16 is connected whereon a pump 17 is provided to propel the fluid towards a burner 18.
  • the fuel withdrawn form tank 15 by means of pump 14 is conveyed, under low pressure ranging from 147 to 294 kPa, along conduit 13 to the intake flange 9 of the emulsifier according to this invention, whereat it meets with water coming through Venturi effect from piping 19 connected to one or more intake fittings 10.
  • Pump 17 provided downstrean of the emulsifier along piping 16 and working at a pushing pressure ranging from 1961 to 2942 kPa, subjects the liquid flow coming from the emulsifier to a strong suction, drawing the heterogeneous mixture of fuel and water coming from flange 1, which is forced to go through the sequence of offset orifices 4.
  • This sequence of forced transitions under reduced pressure subjects the flow of abrupt velocity changes with corresponding compression effects at the orifices 4.
  • Said forced transitions through orifices 4 provide the liquid with a high velocity, and accompanying violent projection against the opposite wall of compartments 5, where the liquid stream refracts and expands.
  • the combined action of the repeated shocks undergone by the forming emulsion combined with the effect of reduced pressure subjects the water droplets to a number of subsequent expansions, so that they vaporize suddenly with an ensuing dispersion and intimate atomization effect in the stream of fuel oil.
  • the following compressions cause a new condensation, and therefore the formation of a higly homogeneous emulsion.
  • the emulsifier device which can include a number of expansion compartments ranging from two to four or more, depending on operation requirements and properties of the non water-mixable liquid to be emulsified, provides highly homogeneous and stable emulsions, even though they are not immediately put in use, and containing from less than 10% to more than 37% by wt of water, with emulsion flow rates ranging from 0 to about 4000 kg/hr. While the temperature of the liquid feed does not represent a limiting factor, at least at ambient temperatures, it is preferable that the temperature of the liquids to be emulsified ranges between 40°C ⁇ and 110°C.
  • the emulsifier device provides a stable emulsion between two non mixable fluids and/or having different viscosity.
  • the most interesting application of the aforesaid emulsifier is the preparation of highly fine and homogeneous emulsions for supplying boiler burners of any capacity and type with liquid fuels, for the purpose of obtaining a perfect combustion, a high performace and a strong reduction of unburnt matter in the exhaust gases to the environment.
  • the subject device compared to the ones presently available on the market, provides a high quality of the emulsion obtained, ease of installation and operation, being simply inserted in series of the fuel piping to the burner, ahead of the pump, thereby making special arrangements unnecessary; it can also be used with any of the existing types of burners; it does not require any maintenance while providing for a high operational safety, the relevant production costs being kept particularly low since the device is a modular core type.
  • the modularity of the expansion compartments comprising the central body of the device allows to modify the operational features thereof, according to requirements, by a simple addition or withdrawal of elements.
  • the device works under reduced pressure, through the suction effect of the burner pump, so that high operating pressures are not required.
  • this invention has been described with reference to a particular embodiment thereof, for use in connection with boiler burners; it can be applied to provide emulsions of any kind and for any use, where a liquid having a sufficiently high vapour pressure must be emulsified with another non-mixable liquid, having a lower vapour pressure.
  • the device of this invention can be used, for example, to provide emulsions of water or acqueous liquids, e.g. solutions, suspensions etc., with non-mixable liquids, in particular oily liquids, having a lower vapour pressure.
EP86830073A 1985-03-25 1986-03-25 Statischer Emulgierungsmischer für nichtmischbare Flüssigkeiten Withdrawn EP0196280A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20069/85A IT1188154B (it) 1985-03-25 1985-03-25 Emulsionatore statico a flusso per liquidi non miscibili
IT2006985 1985-03-25

Publications (2)

Publication Number Publication Date
EP0196280A2 true EP0196280A2 (de) 1986-10-01
EP0196280A3 EP0196280A3 (de) 1988-10-12

Family

ID=11163558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86830073A Withdrawn EP0196280A3 (de) 1985-03-25 1986-03-25 Statischer Emulgierungsmischer für nichtmischbare Flüssigkeiten

Country Status (2)

Country Link
EP (1) EP0196280A3 (de)
IT (1) IT1188154B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233572A (en) * 1989-07-10 1991-01-16 Neptune Orient Lines Limited Producing water-in-oil emulsions
GB2271725A (en) * 1991-05-20 1994-04-27 Zhi Qiang Xie Mechanical oil/water emulsifier
FR2731504A1 (fr) * 1995-03-07 1996-09-13 Merobel Dispositif d'alimentation d'un bruleur a mazout reduisant la pollution
US7284899B2 (en) * 2002-01-09 2007-10-23 Mitsuru Nakano Emulsification/dispersion system using multistage depressurization module and method for producing emulsified/dispersed liquid
EP2090353A1 (de) * 2008-02-15 2009-08-19 Forschungszentrum Karlsruhe Gmbh Reaktionsmischersystem zur Vermischung und chemischer Reaktion von mindestens zwei Fluiden
US7878705B2 (en) * 2000-04-20 2011-02-01 Tt Schmidt Gmbh Static mixing element and method of mixing a drilling liquid
JP2019076820A (ja) * 2017-10-23 2019-05-23 修悦 山本 気体溶解液の生成装置及びこれに用いるエレメント

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1767596A1 (de) * 1967-06-13 1971-09-23 Ceskoslovenska Akademie Ved Einrichtung fuer den Kontakt von mindestens zwei fluessigen Phasen
FR2355556A1 (fr) * 1976-02-20 1978-01-20 Vlieger Jean Pierre De Element statique de mixage
GB2039225A (en) * 1978-12-21 1980-08-06 Showa Denko Kk Mixing device
US4534659A (en) * 1984-01-27 1985-08-13 Millipore Corporation Passive fluid mixing system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1767596A1 (de) * 1967-06-13 1971-09-23 Ceskoslovenska Akademie Ved Einrichtung fuer den Kontakt von mindestens zwei fluessigen Phasen
FR2355556A1 (fr) * 1976-02-20 1978-01-20 Vlieger Jean Pierre De Element statique de mixage
GB2039225A (en) * 1978-12-21 1980-08-06 Showa Denko Kk Mixing device
US4534659A (en) * 1984-01-27 1985-08-13 Millipore Corporation Passive fluid mixing system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233572A (en) * 1989-07-10 1991-01-16 Neptune Orient Lines Limited Producing water-in-oil emulsions
GB2233572B (en) * 1989-07-10 1994-03-23 Neptune Orient Lines Limited Method and apparatus for producing layer-in-oil emulsions
GB2271725A (en) * 1991-05-20 1994-04-27 Zhi Qiang Xie Mechanical oil/water emulsifier
GB2271725B (en) * 1991-05-20 1996-07-03 Zhi Qiang Xie Mechanical oil/water emulsifier
FR2731504A1 (fr) * 1995-03-07 1996-09-13 Merobel Dispositif d'alimentation d'un bruleur a mazout reduisant la pollution
US7878705B2 (en) * 2000-04-20 2011-02-01 Tt Schmidt Gmbh Static mixing element and method of mixing a drilling liquid
US7284899B2 (en) * 2002-01-09 2007-10-23 Mitsuru Nakano Emulsification/dispersion system using multistage depressurization module and method for producing emulsified/dispersed liquid
EP2090353A1 (de) * 2008-02-15 2009-08-19 Forschungszentrum Karlsruhe Gmbh Reaktionsmischersystem zur Vermischung und chemischer Reaktion von mindestens zwei Fluiden
JP2019076820A (ja) * 2017-10-23 2019-05-23 修悦 山本 気体溶解液の生成装置及びこれに用いるエレメント

Also Published As

Publication number Publication date
IT1188154B (it) 1988-01-07
EP0196280A3 (de) 1988-10-12
IT8520069A0 (it) 1985-03-25

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