EP1846144A1 - Vorrichtung zur erzeugung einer grösstmöglichen phasengrenzfläche zur kontinuierlichen und hocheffizienten durchmischung unterschiedlicher fluide in gas-flüssigkeits-gemischen - Google Patents
Vorrichtung zur erzeugung einer grösstmöglichen phasengrenzfläche zur kontinuierlichen und hocheffizienten durchmischung unterschiedlicher fluide in gas-flüssigkeits-gemischenInfo
- Publication number
- EP1846144A1 EP1846144A1 EP06706394A EP06706394A EP1846144A1 EP 1846144 A1 EP1846144 A1 EP 1846144A1 EP 06706394 A EP06706394 A EP 06706394A EP 06706394 A EP06706394 A EP 06706394A EP 1846144 A1 EP1846144 A1 EP 1846144A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- nozzle
- tubes
- gas
- mixing
- 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
Links
Classifications
-
- 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
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/234—Surface aerating
-
- 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
- B01F25/25—Mixing by jets impinging against collision plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0418—Geometrical information
- B01F2215/0427—Numerical distance values, e.g. separation, position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0418—Geometrical information
- B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2215/00—Auxiliary or complementary information in relation with mixing
- B01F2215/04—Technical information in relation with mixing
- B01F2215/0413—Numerical information
- B01F2215/0436—Operational information
- B01F2215/0481—Numerical speed values
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
Definitions
- the invention relates to an apparatus of particularly simple and space-saving design for generating a maximum phase interface for the mass transfer in the continuous mixture of fluids in gas-liquid mixtures. At the same time a particularly high efficiency of the homogenization of the mixture is achieved with relatively low energy input and prevents foaming automatically.
- a similar device is known from WO 2004/000447 A2 for gas saturation of a liquid under pressure and in combination with a device for releasing pressure for introducing the expanded liquid into a flotation cell, but without a device for automatically preventing foaming, whereby the application area to or limited foaming systems is known. Therefore, this device has hitherto been used only in combination of a gas (air or nitrogen) with a liquid (water or wastewater) in Druckentnapssflotation but never in the reaction, stirring or mixing technique or for mixing several gas or liquid phases Service.
- Provision of a sufficiently large container volume for a suitable flow guidance Provision of a sufficiently large container volume for a suitable flow guidance.
- the object of the invention is therefore to provide a structurally particularly simple, space-saving and particularly energy-saving device for the continuous mixing of fluids in gas-liquid mixtures, preferably foaming, in particular high-foaming, mixtures, which does not have the disadvantages of the systems of the prior art ,
- the present invention therefore relates to a device for continuously mixing fluids
- one or more nozzles for injecting liquid into the mixing container at the head of the mixing container
- the introduction of the liquid which is to be mixed with the gas takes place at the top of the mixing container via one or more nozzles, preferably conventional plain-jet nozzles. These can be screwed into the lid of the mixing container.
- the pressure loss at the nozzles should be less than 2 bar under operating conditions, preferably between 1 bar and 0.4 bar.
- the nozzles generally have diameters of 2 to 50 mm, preferably at their narrowest flow cross-sections diameter greater than 4 mm, whereby a blockage by fine particles can be excluded.
- the nozzles can be protected by upstream, backwash filter filters.
- the flow of the added liquid can be previously divided into individual feed pipes.
- the liquid flow through the individual nozzles can preferably be controlled separately for each nozzle by upstream or downstream shut-off valves, for. B. by a battery of shut-off valves. Thereby, the amount of liquid supplied to the mixing container can be adjusted according to need.
- the injection of the liquid takes place at a speed of more than 3 m / s, preferably more than 6 m / s.
- the choice of the speed of the injection depends on the conversion rate or the diffusion rate or the concentration gradient to the thermodynamic or physical-chemical equilibrium of the material system. In order to influence the equilibrium in the tubular reactor in order to produce a desired turnover or concentration gradient, it may be helpful to specify pressure and temperature accordingly.
- the liquid jet of each nozzle first strikes the cone, which is arranged with the tip upwards in the gas space, with or without an axial through-bore.
- the axes of the nozzle bore and cone are exactly the same.
- the distance of the cone to the nozzle is 10-100 mm, preferably 20-50 mm.
- the diameter of the axial bore through the cone is 0.5-5 mm, preferably 1-2 mm smaller than the diameter of the liquid jet or the nozzle.
- the full beam can not pass through the conical bore.
- the outer edge of the jet is peeled off annularly and fanned along the conical surface, after which it flows down in the form of a thin liquid film and continues the conical surface until it enters the liquid level at the container wall.
- the sharp liquid jet prior to entering the liquid collected below, cuts the foam bubbles piling up over the phase interface so that undesirable foaming will automatically occur without further physical or chemical counteraction is prevented.
- the jet flowing through the conical bore penetrates the gas cushion in the space between cones and the tubes located in the liquid space in the form of a free jet and then enters the tube arranged below.
- the distance between each of the tubes and the associated nozzle is in the range of 100-400 mm, preferably in the range of 150-250 mm.
- the liquid is swirled and a short time later emerges from the top of the pipe again.
- the respectively assigned pipe is always filled with liquid. Due to the free jet of the liquid through the gas cushion, gas molecules are entrained and introduced into the interior of the tube in the form of gas bubbles. wear. Due to the high shear forces and turbulence in the tube, there is an intensive contact of gas and liquid as a result of which a concentration balance or a material flow can occur. Ascending gas bubbles are divided by the liquid flowing from above into the pipe and conveyed downwards again.
- the residence time of the liquid in the tubes depends on the one hand on the speed of the injection and on the other hand on the ratio of the diameter of the tubes to the diameter of the associated nozzle at the liquid outlet of the nozzle. In this case, the larger the ratio of the diameter of the tubes to the diameter of the associated nozzles, the greater the residence time. As the velocity of the injection increases, the residence time decreases while the ratio of the diameter of the tubes to the diameter of the associated nozzle remains the same.
- the ratio of the diameter of the tube to the diameter of the associated nozzle at 3 to 8, preferably 3 to 5, more preferably it is 4.
- the residence time of the liquid in the tubes is erfmdungsgraf smaller than 10 s, preferably less than 5 s, more preferably less than 2.5 s.
- Preferred, particularly preferred or very particularly preferred are embodiments which make use of the parameters, compounds, definitions and explanations mentioned under preferred, particularly preferred or very particularly preferred.
- the liquid flows out of the tubes and accumulates or accumulates in the lower part of the container, where it can escape through the liquid outlet below the tubes at the bottom of the container.
- the liquid outlet at the bottom of the mixing container is dimensioned so that the outflow velocity of the liquid from the mixing container in the range between 50 and 150 m / h, preferably in the range of 70 and 90 m / h.
- the liquid stored in the container has the function of a bubble filter. Larger bubbles (d> 100 microns) can not get into the liquid outlet, as they rise faster than the liquid moves down.
- the control of the level in the mixing tank is done by regulating the gas supply.
- the level of the liquid in the tank can be controlled by a level gauge.
- a float in the pipeline indicates the level.
- the float is magnetically detectable and activates a minimum and maximum circuit. In the min case, the supply of gas is automatically stopped. In the max case, the supply of gas is opened.
- the maximum pressure in the tank can be adjusted by a pressure reducing valve in the gas supply line.
- the level meter in combination with the min. And max. Circuit not only regulate the level of the mixing tank with the liquid, but also ensure sufficient supply of the mixing tank with gas.
- the liquid is automatically fed in this way as much gas as is consumed by the mass transfer.
- An advantage of the devices according to the invention for the continuous mixing of fluids is that even before the nozzle metered additives in the form of liquids in the range of aqueous viscosities can be mixed in easily.
- the devices according to the invention for the continuous mixing of fluids work very energy-efficiently, because the pump pressure generated is converted by the combination of nozzles and mixer geometry into virtually pure flow energy and thus in a mixture-promoting manner.
- no additional drive unit for ' generating a rotational movement is used, wherein energy is dissipated in frictional heat.
- the device is constructed of very simple components ⁇ and can thus be manufactured extremely inexpensively.
- An advantage of the devices according to the invention for the continuous mixing of fluids is also that by the connection and disconnection of individual nozzle elements, the liquid flow rate and thus the gas input can be flexibly controlled.
- the device according to the invention is suitable, for example, for carrying out mixing or dissolution processes of fluid components as multiphase mixtures with more than one liquid and / or gaseous phase, oxidation reactions with gaseous oxidation mittein as well as other chemical or physical reactions, whereby it is to be ensured that
- reaction rate is so great that the residence time in the small volume of the mixing container at the high flow velocities due to the method is still sufficient and
- the viscosity of the fluids is small enough to produce the required turbulence.
- Fig. 1 shows an exemplary structure of a mixing container 1 with internals.
- the introduction is flow-controlled at the head of the mixing container via one or more conventional smooth-jet nozzles 3, which are screwed into the container lid 2.
- the flow of the supplied liquid is previously divided into individual feed pipes 4.
- the liquid first passes through the gas cushion 5 in the form of a free jet and then impinges on the cone 6. While a portion of the liquid flows along the shell of the cone 6 and this continues downward, the remaining beam flows through the conical bore and enters the underlying tube 7 a. There, the liquid is vortexed and mixed with gas bubbles and emerges a short time later up again.
- the water flows out of the tubes 7 and accumulates or accumulates in the lower region 8 of the container 1.
- the liquid exits through the liquid outlet 9 at the bottom of the container 1.
- FIG. 2 shows a nozzle unit 3 with the firmly connected cone 6 in a detailed view.
- a container made of plastic was integrated as shown in FIG. 3 in a pilot plant .
- It was a 1500 mm long, vertical standing, 190 mm inside diameter tubular reactor.
- the reactor was suspended concentrically with a 500 mm long, bottom-terminated tube attached to four steel bars, the distance between the top of the tube and the lid being 150 mm.
- Example 2 An experiment similar to Example 1 was carried out, whereby a specific energy input of 0.019 kWh / m 3 was determined. Comparative figures for a conventional injector are 0.075 kWh / m 3 .
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Accessories For Mixers (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005003626A DE102005003626A1 (de) | 2005-01-26 | 2005-01-26 | Vorrichtung zur Erzeugung einer größtmöglichen Phasengrenzfläche zur konti-nuierlichen und hocheffizienten Durchmischung unterschiedlicher Fluide in Gas-Flüssigkeits-Gemischen |
| PCT/EP2006/000625 WO2006079510A1 (de) | 2005-01-26 | 2006-01-25 | VORRICHTUNG ZUR ERZEUGUNG EINER GRÖßTMÖGLICHEN PHASENGRENZFLÄCHE ZUR KONTINUIERLICHEN UND HOCHEFFIZIENTEN DURCHMISCHUNG UNTERSCHIEDLICHER FLUIDE IN GAS-FLÜSSIGKEITS-GEMISCHEN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1846144A1 true EP1846144A1 (de) | 2007-10-24 |
| EP1846144B1 EP1846144B1 (de) | 2008-05-28 |
Family
ID=36263950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06706394A Expired - Lifetime EP1846144B1 (de) | 2005-01-26 | 2006-01-25 | Vorrichtung zur erzeugung einer grösstmöglichen phasengrenzfläche zur kontinuierlichen und hocheffizienten durchmischung unterschiedlicher fluide in gas-flüssigkeits-gemischen |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1846144B1 (de) |
| AT (1) | ATE396781T1 (de) |
| DE (2) | DE102005003626A1 (de) |
| ES (1) | ES2306423T3 (de) |
| WO (1) | WO2006079510A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20111248A1 (it) * | 2011-07-05 | 2013-01-06 | Air Liquide Italia S P A | Metodo ed impianto per solubilizzare gas in liquidi |
| JP5878343B2 (ja) * | 2011-11-25 | 2016-03-08 | 株式会社ガスター | 加圧容器 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB365513A (en) * | 1930-09-11 | 1932-01-11 | William Vincent Boby | Apparatus for mixing two or more fluids |
| FR1285644A (fr) * | 1960-04-07 | 1962-02-23 | Ingeniors N Fliesberg Aktiebol | Procédé et dispositif pour dissoudre des gaz dans des liquides |
| DE1475183A1 (de) * | 1966-07-18 | 1969-02-20 | Freiberg Bergakademie | Vorrichtung zur Zerstaeubung von Fluessigkeiten |
| JPS5316963A (en) * | 1976-07-22 | 1978-02-16 | Kurita Water Ind Ltd | Air bubble generating device |
| DE2634496C2 (de) * | 1976-07-31 | 1985-10-17 | Bayer Ag, 5090 Leverkusen | Injektor zur Begasung einer Flüssigkeit |
| DE3027035A1 (de) * | 1980-07-17 | 1982-02-18 | Hoechst Ag, 6000 Frankfurt | Vorrichtung zum begasen von fluessigkeiten oder suspensionen |
-
2005
- 2005-01-26 DE DE102005003626A patent/DE102005003626A1/de not_active Withdrawn
-
2006
- 2006-01-25 AT AT06706394T patent/ATE396781T1/de active
- 2006-01-25 WO PCT/EP2006/000625 patent/WO2006079510A1/de not_active Ceased
- 2006-01-25 DE DE502006000847T patent/DE502006000847D1/de not_active Expired - Lifetime
- 2006-01-25 EP EP06706394A patent/EP1846144B1/de not_active Expired - Lifetime
- 2006-01-25 ES ES06706394T patent/ES2306423T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006079510A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005003626A1 (de) | 2006-07-27 |
| DE502006000847D1 (de) | 2008-07-10 |
| WO2006079510A1 (de) | 2006-08-03 |
| ATE396781T1 (de) | 2008-06-15 |
| ES2306423T3 (es) | 2008-11-01 |
| EP1846144B1 (de) | 2008-05-28 |
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