EP0644271A1 - Procede et dispositif pour la production d'un systeme libre de dispersion - Google Patents

Procede et dispositif pour la production d'un systeme libre de dispersion Download PDF

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Publication number
EP0644271A1
EP0644271A1 EP92903375A EP92903375A EP0644271A1 EP 0644271 A1 EP0644271 A1 EP 0644271A1 EP 92903375 A EP92903375 A EP 92903375A EP 92903375 A EP92903375 A EP 92903375A EP 0644271 A1 EP0644271 A1 EP 0644271A1
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EP
European Patent Office
Prior art keywords
flow
cavitation
flow channel
hydrodynamic
cone
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Withdrawn
Application number
EP92903375A
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German (de)
English (en)
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EP0644271A4 (fr
Inventor
Oleg Vyacheslavovich Kozjuk
Alexandr Anatolievich Litvinenko
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Individual
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    • 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
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • 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
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • 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
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/434—Mixing tubes comprising cylindrical or conical inserts provided with grooves or protrusions

Definitions

  • the present invention relates to hydrodynamics, in particular to a method for producing a freely disperse system and to a device for carrying out the method.
  • Devices for carrying out these methods are also widely known, in which a body which can flow around in a flow direction in the direction of the hydrodynamic flow is the main element.
  • the phenomenon of hydrodynamic cavitation consists in the formation of cavities filled with a vapor gas mixture in the interior of the liquid flow or at the boundary of the body which is difficult to flow around due to a local pressure drop caused by the liquid movement.
  • the mixing, emulsifying and dispersing action of hydrodynamic cavitation is the result of a large number the force effects of collapsing cavitation bubbles on the mixture of components to be treated.
  • cavitation-related dispersion is related to the formation of cumulative microcurrent threads. It is believed that due to the interaction of a shock wave generated by collapsing cavitation bubbles with the bubbles at the phase boundary, cumulative microcurrent filaments are formed. Intensive mixing and dispersion can be explained by the formation of high-intensity micro-vortices and the subsequent disintegration of the cumulative microcurrent threads.
  • the process of comminuting the liquid is caused by tangential stresses acting on it at the boundaries of the cavitation-related micro-vortices, while the dispersion of the solid particles takes place as a result of the hydrodynamic penetration of the cumulative micro-current filament into the particle.
  • a method for producing a freely disperse system - a suspension of fibrous materials which allows the passage of a hydrodynamic flow of fibrous materials through a flow channel with a body which is difficult to flow around and which is arranged transversely to the stream, and which ensures local current narrowing, and the generation behind it a hydrodynamic cavitation field, which acts on the flow of the fibers until their suspension is formed.
  • a device which has a housing which has an inlet opening and an outlet opening, and which are arranged one behind the other and are connected to one another on the side of the inlet opening: a confuser, a flow channel with a one-piece cylindrical housing accommodated therein contains poorly flowable body and a diffuser (US, A, 3834982).
  • the described method and the device for its implementation do not ensure sufficient effectiveness the process of mixing and dispersing fibrous materials, since the intensity of the resulting cavitation field is not high and there is no possibility of regulating it.
  • An intensive "hard” action is required to produce a high-quality suspension of fibrous materials.
  • the parameters that determine the intensity of the energy impact of the hydrodynamic cavitation field include the degree of cavitation and the treatment rate.
  • the degree of cavitation is determined by the ratio of a characteristic size of the expansion of the cavitation field to the size of the body that is difficult to flow around in its cross-section at the location of the local current restriction, while the treatment rate is characterized by the number of zones of cavitation on the flow of the components to be treated.
  • the construction of the body which is difficult to flow around in the device described is such that a cavern formed in the cylindrical rear part forms a cavitation field with a low degree of cavitation and a unique degree of treatment when detached and destroyed in the area of high pressures.
  • the process of dispersing fibrous materials takes place without the "hard” action on them.
  • the quality of the suspension obtained is not high. Because there is no possibility of regulating the intensity of the cavitation field, the method and the device have extremely limited technological applications.
  • the invention has for its object to provide a method for producing a freely disperse system that regulates the intensity of the hyrodynamic Cavitation field and a suitable selection of its parameters, taking into account the properties of the components of a stream to be treated, which would allow different components to be treated equally effectively according to their physico-chemical characteristics, as well as a device for carrying out this method with such a type of schecht to develop flowable body, which allows to regulate the treatment rate while increasing the degree of cavitation, which would significantly increase the quality of the free dispersed system produced and expand the technological possibilities of the process.
  • the object is achieved in that in the process for producing a freely disperse system, which allows the passage of a hydrodynamic flow of components through a flow channel with a body which can be flowed around in it, which ensures local current restriction, and the generation behind this of a hydrodynamic cavitation field , which acts on the flow of the components to be treated to form a flow of a freely disperse system, comprises, according to the invention, the local current restriction at least in two flow channel sections, the cross-sectional profile of each of them and the distance between them being selected on the basis of the condition , the ratio of the speed of the said current in each of these sections to the speed of the flow of the freely disperse system at the outlet from the flow channel is at least equal to 2, 1 and the degree of cavitation of the hydrodynamic flow of the cavitation field at least 0.5.
  • Such a method will allow high-quality, in the physical state, stable lyosols, emulsions, suspensions from components that are different according to their physico-chemical characteristics To obtain more complete exploitation of the erosion activity of the field of cavitation microbubbles and the energy of the current of the components to be treated.
  • pressure waves are formed as a result of the hydrodynamic effects that arise, which act intensively on the cavitation field of the bubbles, which collapse with the formation of cumulative filaments.
  • the intensity and the energy potential of the cavitation field are about an order of magnitude higher than if the individual collapses of the bubbles do not match. In this way, the energy concentration and the erosion effect on the current of the components to be treated take place.
  • the method according to the invention offers the possibility of regulating the intensity of the evolving hydrodynamic cavitation field in adaptation to the specific technological process sequences.
  • the object is also achieved in that in the device for producing a freely disperse system, which has a housing which has an inlet and an outlet opening, and in the housing on the side of the inlet opening which are arranged one behind the other and are connected to one another: a confuser, contains a flow channel with a poorly flowable body accommodated therein and a diffuser, according to the invention the body around which the flow flows around includes at least two interconnected elements, the shape and the distance between which are selected on the basis of the condition, behind each element its own hydrodynamic field with a degree of cavitation of at least 0.5, which is different in terms of the degree of cavitation from the hydrodynamic cavitation fields of the other elements and can interact with them.
  • the body which is difficult to flow around to contain three elements in the form of hollow truncated cones which are arranged one behind the other in the direction of flow and with their smaller base areas pointing towards the side of the confuser, each cone preceding in the flow direction having a diameter of the larger base area which exceeds the diameter of the larger base area of each subsequent cone, and the cones being fastened to rods which are coaxial in the flow channel with this and are arranged axially displaceable relative to each other coaxially.
  • each preceding and trailing cone be selected to be at least 0.3 of the diameter of the larger base of the previous cone, while the cone angle of each subsequent cone is less than or substantially equal to the cone angle of each previous cone.
  • each element has its own hydrodynamic cavitation field, these fields having a different degree of cavitation, which, however, is not less than 0.5 and due to the geometry of these elements and the extension of the each element generated field is determined.
  • the degree of cavitation in these fields can be easily controlled thanks to the movement of each subsequent element in the direction of flow.
  • the relative movement of the elements makes it possible to change the position of the sections of the restriction of the hydrodynamic flow and consequently the position of the cavitation fields behind the elements and the intensity of their action. This enables the degree of cavitation and the treatment rate of the flow of the components to be treated to be regulated.
  • the sections of the local constriction have an annular profile along the length of the flow channel, which is optimal when the energy of the hydrodynamic current is used in the treatment of the components.
  • the body which is difficult to flow around contains at least three elements, each of which has the shape of a truncated cone with different cone angles and is arranged in such a way that its axes are in the plane one and the same cross-section of the flow channel, and which are connected with their smaller base areas to a holder arranged in the flow channel at the same axis, but with their larger base areas contact the wall of the flow channel, the angles between the axes of the truncated cones starting from the condition is chosen to ensure the equality of the areas of the spaces between the said cones.
  • the latter are rotatably connected to the holder about axes which are located in a plane perpendicular to the axis of the flow channel.
  • cavitation fields interact with one another by ensuring intensive mixing of the bubbles and saturation of the flow of the elements to be treated in the entire volume of the flow channel. Due to the polydisperse structure of the total cavitation field formed from individual cavitation fields, the individual concentration of the cavitation bubbles increases in the zone of collapse, which increases the effect of the cavitation treatment. The different mean diameters of the elements also cause different frequencies of detachment of the cavitation caverns that form behind them. In the zone of collapse, polyfrequency pressure pulses therefore act on the cavitation bubbles, which determine conditions for the concurrent collapse of groups of cavitation bubbles of the same dimensions.
  • the resulting shock waves increase the pressure in the zone of collapse, and the wide range of polyfrequent pressure pulsations does not only affect that collapsing cavitation bubbles, but also the cavitation caverns migrating in the stream, which accelerates their destruction and thus intensifies the process of mixing, dispersing and emulsifying the components to be treated.
  • the device contains at least one additional body which is difficult to flow around, which is similar to the main body, is arranged behind it in the direction of flow and can be moved with it by an elastic element along the axis of the Flow channel is connected.
  • the second body which is difficult to flow around, performs longitudinal and radial self-resonance vibrations under the effect of the incoming flow to be treated, thanks to the existing elastic element, by causing current pulsations and an intensive destruction of the boundary layer on the surface of the elements of the poorly flowable bodies, behind which the cavitation fields are located form.
  • a vacuum pulse passes through these cavitation fields, which ensures sufficiently large initial dimensions and consequently a high potential energy of the cavitation bubbles that form.
  • a "harder" collapse of the bubbles splinted.
  • the additionally stored potential energy makes it possible to achieve a larger phase interface of the components of the current to be treated.
  • the pulsations of the cavitation fields caused by the second body which is difficult to flow around favor the formation of additional cavitation bubbles over the entire cross section of the flow channel, which increases the erosion effect of these fields on the flow of the components to be treated.
  • the method according to the invention consists in passing a hydrodynamic flow of components to be treated, for example water and an oil component, through a flow channel with a body that can be poorly flowed around, for example in the form of a rotating body.
  • This body has a shape and an arrangement such that the flow is subjected to local constriction in at least two sections of the flow channel.
  • a hydrodynamic cavitation field is created behind the poorly flowable body, which exerts a mixing, dispersing and emulsifying effect on the components to be treated.
  • the sections of the local flow restriction are formed in succession in the direction of flow, or the sections of the local flow restriction are formed parallel to one another in one and the same cross section of the flow channel.
  • a gaseous component is introduced into the hydrodynamic stream at least in a section of its constriction or immediately behind it.
  • a device for carrying out the method according to the invention, which is shown schematically in FIGS. 1 to 7.
  • the design of a body which is difficult to flow around is provided, which consists of at least two elements in which their shape and the distance between them is selected on the basis of the condition that each of them has its own hydrodynamic cavitation field , whereby the fields differ from each other by the degree of cavitation.
  • the degree of cavitation of each local field is not guaranteed to be smaller than 0.5, since otherwise no conditions are created for the effective action on the components to be treated.
  • FIG. 1 schematically shows a device which has a housing 1, which has an inlet opening 2 and an outlet opening 3, and in which, on the side of the inlet opening 2, one behind the other, connected to one another: a confuser 4, a flow channel 5 and contains a diffuser 6.
  • a body 7 is difficult to flow around, which contains three elements in the form of hollow truncated cones 8, 9, 10, which one behind the other in the direction of flow are arranged and show with their smaller base areas towards the side of the confuser 4.
  • the body 7, which is difficult to flow around, and the wall 11 of the flow channel 5 form sections 12, 13, 14 of the local flow restriction arranged one behind the other in the flow direction, which have an annular cross-sectional profile.
  • the first cone 8 in the direction of flow has a diameter of the larger base area 15 which exceeds the diameter of the larger base area 16 of the subsequent cone 9.
  • the diameter of the larger base area 16 of the cone 9 exceeds the diameter of the larger base area 17 of the subsequent cone 10.
  • the cone angle decreases the cones 8, 9, 10 from each preceding to each subsequent cone.
  • the cones 8, 9, 10 are attached to respective rods 18, 19, 20 which are arranged in the flow channel 5 coaxially with the latter.
  • the rods 18, 19 are hollow and are arranged coaxially to one another, while the rod 20 is accommodated in the cavity of the rod 19 along its axis.
  • the rods 19 and 20 are connected to individual devices (not shown in FIG.
  • the rod 18 is provided with a device for axial displacement along the axis of the flow channel 5.
  • the axial displaceability of the cone 8, 9, 10 makes it possible to change the geometry of the body 7, which is difficult to flow around, and thus to change the cross-sectional profile of the sections 12, 13, 14 and the distance between them over the length of the flow channel 5, which it is allows to regulate the degree of cavitation of the hydrodynamic cavitation fields behind each of the cones 8, 9, 10 and the treatment rate of components.
  • the following cones 9, 10 can be accommodated in part in the cavity of the preceding cones 8, 9, however the minimum distance between the smaller base areas thereof is maintained at least equal to 0.3 of the larger diameter of the respective preceding cones 8, 9. If necessary, one of the following cones 9, 10 can be completely accommodated in the cavity of the previous one, but on the condition that two working elements are retained on the body 7 which is difficult to flow around. The flow of the components to be treated is guided in the direction of arrow A.
  • the device according to the invention contains a body 21 which is difficult to flow around and is accommodated in the flow channel 5 and which consists of two elements in the form of hollow hemispheres 22, 23 which are arranged one behind the other in the direction of flow and with their tips on the side of the body Show confuser 4.
  • the first hemisphere 22 in the direction of flow has a diameter of the larger base area 24, which exceeds the diameter of the larger base area 25 of the second hemisphere 23.
  • the hemisphere 22 is attached to a hollow rod 26, which is arranged in the through-flow channel 5 co-axially therewith.
  • the hemisphere 23 is attached to a rod 27 which is arranged in the cavity of the rod 26.
  • the rod 27 is connected to a device (not shown in Fig. 2) for axially displacing it relative to the rod 26.
  • FIG. 3 shows a further variant of the invention Device is shown, in the flow channel 5 of which a body 30 which is difficult to flow around is accommodated, which contains three elements in the form of truncated cones 31, 32, 33 with different cone angles, as shown in FIG. 4, or else a body 34 which is difficult to flow around. which contains seven elements in the form of truncated cones 35, 36, 37, 38, 39, 40 with different cone angles, as shown in FIG. 5. The number of elements depends on the physicochemical characteristics of the components to be treated and, accordingly, on the required intensity of the cavitation effect on them.
  • the cones 31-33 and 35-41 are arranged so that their axes are in the plane of the same cross section of the flow channel 5.
  • a holder 42 (FIG. 3), which has a cylindrical shape with conical ends to reduce the hydrodynamic resistance to the inflow and is arranged coaxially with the flow channel 5.
  • the cones 31-33 and 35-41 are fastened in a bush 43 which is held on the inner wall 11 of the flow channel 5.
  • a variant is possible in which the holder 42 is kinematically connected to the smaller base areas of the cones 31-33 or 31-41, namely rotatable about axes which are in a plane perpendicular to the axis of the flow channel 5 (this is shown in FIG 3 not shown).
  • the angles between the axes of the truncated cones 31-33 (FIG. 4) and 35-41 (FIG. 5) are chosen based on the condition that the areas of the spaces 44 and 45 between them are equal.
  • the spaces 44, 45 are the sections of a local restriction of the hydrodynamic flow of the components to be treated. The flow of the components to be treated is guided in the direction of arrow A.
  • FIG. 6 shows a device according to the invention, in the flow channel 5 of which an additional body 46 with an elastic element — a spring 47 — is arranged behind the body 34 in the flow direction and can be moved along the axis of the channel 5.
  • the smaller base areas of the truncated cones 35-41 are fastened to a rod 48 which is arranged in the flow channel 5 coaxially therewith.
  • the body 46 which is difficult to flow around in FIG. 7 consists of four elements in the form of truncated cones 49, 50, 51, 52 with different cone angles, at which their axes are in one and the same plane of the cross section of the cross section of the flow channel 5.
  • the angles ⁇ between the axes of the truncated cones 49-52 are chosen based on the condition that the areas of the spaces 55 between them are equal.
  • the spring 47 which connects the bodies 46 and 34, which are difficult to flow around, is arranged coaxially with the rod 48. The flow of the components to be treated is guided in the direction of arrow A.
  • FIG. 1 works as follows. A hydrodynamic flow of components to be treated passes in the direction of arrow A through the inlet opening 2 and the confuser 4 into the flow channel 5, is contracted and strikes the body 7, which is difficult to flow around, more precisely its first element - the hollow truncated cone 8. Then the stream of the components to be treated passes in succession the annular sections 12, 13, 14 of the local stream constriction and flows around the following elements: the cones 9, 10.
  • the generation of an intense cavitation effect on the flow under these conditions by maintaining the ratio of the flow velocities in each of the sections 12, 13, 14 to the flow rate of the free disperse system being formed at the outlet from the flow channel 5 is at least equal to 2 , 1 and the degree of cavitation of each of the fields determined at least 0.5.
  • the flow rate in section 12 is determined by the width of the latter and the initial flow rate at the entrance to the device, and in sections 13, 14 the flow rate is determined by the position of the cones 9, 10 with respect to the cone 8.
  • the length of the cavitation field behind each of the cones also changes. Therefore, by changing the position of the cones 8, 9, 10 with respect to each other and over the length of the flow channel 5, the degree of cavitation and the speed ratio are regulated. The distance between the cones 8, 9, 10 is changed by axially displacing the rods 19, 20 with the aid of appropriate devices.
  • the speed in sections 12, 13, 14 is not maintained below 20 m / s, and the distance between the smaller base areas of cones 8, 9, 10 is not less than 0.3 of the larger diameter of each preceding cone 8 or 9.
  • the mutual displacement of the cones 8, 9, 10 also makes it possible to regulate the treatment rate of the flow of the components, thereby ensuring the required number of zones of cavitation depending on the physicochemical properties of the components, because each element of the body which is difficult to flow around 7 can work as an independent level.
  • the flow of the components to be treated is converted into the flow of a freely disperse system, which is led out of the device via the diffuser 6 and the opening 3.
  • the quality of the freely dispersed system produced is determined according to the specific surface of the disperse phase and the diameter of the particles obtained, which have been specified in advance depending on the required properties of the system to be produced.
  • FIG. 2 The device according to the invention (FIG. 2) works in a similar manner to that described above.
  • a hydrodynamic flow of components to be treated which is guided in the direction of arrow A, passes the annular sections 28, 29 of the local constriction, flows around the body 21, which is difficult to flow around, and forms its own cavitation fields behind each of its elements in the form of hollow hemispheres 22, 23. which differ in the degree of cavitation.
  • the speed in section 29 and the degree of cavitation of these fields is regulated by the position of the hemisphere 23 in relation to the hemisphere 22 by the axial displacement of the rod 27 with the aid of a corresponding device.
  • the cavitation fields interact with each other by ensuring the conditions of a collapse of cavitation bubble groups. This increases the erosion effect on the components to be treated and improves the quality of the freely dispersed system produced.
  • FIGS. 3-5 The device according to the invention (FIGS. 3-5) works as follows.
  • a hydrodynamic flow of components to be treated arrives in the direction of arrow A through the inlet opening 2 and the confuser 4 in the flow channel 5, is contracted and strikes the conical part of the holder 2 and the body 30 or 34 which is difficult to flow around.
  • the stream passes through all the spaces 44 or 45 and flows around either three elements in the form of truncated cones 31-33, or seven elements in the form of truncated cones 35-41. Thanks to the same surface areas of the spaces 44 or 45, the flow becomes even in the volume of the Flow channel 5 distributed.
  • the design of the cones with different cone angles determines their difference in cross-section in the direction of the bend, that is to say with different average diameters.
  • the difference in the mean diameters will determine a different frequency of detachment of the cavitation cavities that form behind each of the cones 31-33 or 35-41.
  • the caverns form pulsating cavitation fields behind each of the elements, which fields consist of cavitation bubbles of different dimensions.
  • the cavitation fields interact, the bubbles collapse, the individual concentration of the bubbles in the zone of collapse increases, the cavitation effect of the treatment increases.
  • a sufficiently broad spectrum of polyfrequent pressure pulsations has a significant influence on the intensification of the cavitation field, which is due to the different frequency of detachment of the moving caverns from the cones 31-33 or 35-41.
  • the pressure pulsations which act not only on the collapsing bubbles, but also on the disintegrating caverns, increase the energy potential of the cavitation field, allow the energy of the current of components to be treated to be used effectively enough.
  • the initial velocity of the hydrodynamic flow will be given on the basis of the condition that the ratio of the velocity in the sections of its local constriction, i.e. in the spaces 44 or 45, to the velocity of the flow of the freely dispersed system which forms at the outlet from the flow channel is at least as large 2.1 maintain.
  • the speed in the sections of the local constriction is not set below 20 m / s, and the degree of cavitation of each of the cavitation fields should exceed 0.5 by appropriate selection of the geometric parameters of the cones 32-33, 35-41 and the distance between them.
  • the intensity of the effect of cavitation on the components to be treated can be regulated by changing the number of elements on the body which is difficult to flow around.
  • the flow of the freely dispersed system produced enters the diffuser 6 from the flow channel 5 and is led out of the device through the opening 3.
  • a hydrodynamic flow of components to be treated enters the device (FIGS. 6, 7) in the direction of arrow A through the opening 2.
  • the flow Via the cone 4, the flow enters the flow channel 5 and strikes the body 34, which is difficult to flow around consists of seven elements - the truncated cones 35 - 41.
  • the current ensures conditions in which each of the cones 35-41 generates different non-stationary moving caverns in terms of structure and size.
  • the caverns disintegrate in the area of no pressure and form cavitation fields behind each of the elements with different ones Degree of cavitation. When these fields interact, the cavitation bubbles are mixed intensively and the current is saturated with them in the entire volume of the flow channel 5.
  • the spring 47 is also a source of additional current pulsations that affect the character of the cavitation collapse, thereby increasing the erosion effect of the action.
  • the treatment rate of the components increases several times in comparison with the variant if a single body which is difficult to flow around is accommodated in the flow channel 5.
  • This embodiment variant of the device is best suited for the preparation of a high-quality, freely disperse system of the type of a suspension.
  • the flow of the freely dispersed system formed is led out of the device via the diffuser 6 and the opening 3.
  • a hydrodynamic stream consisting of 95% by mass of water and 5% by mass of industrial oil is passed through the opening 2 into the device at a speed of 40.5 m / s as shown in FIG. 1.
  • the flow of the components passes through the confuser 4 into the flow channel 5 and flows around the body 7 which is difficult to flow around.
  • the speed (V c ) of the flow in the sections 12, 13, 14 of its local input is kept equal to 39.3 m / s , 42.1 m / s, 43.2 m / s upright.
  • the degree of cavitation of the cavitation fields forming behind the hollow truncated cones 8, 9, 10 is set equal to 0.65, 0.6, 0.5.
  • the flow of the components to be treated which passes through the flow channel 5 and flows around the cones 8, 9, 10, is subjected to a cavitation effect which ensures a high degree of emulsification of the components.
  • the velocity (V) of the flow of the emulsion formed is 18.7 m / s at the outlet from the flow channel.
  • the quality of the emulsion produced is assessed according to the specific surface of the disperse phase (oil phase). It is 1000 m2 / m3.
  • a hydrodynamic stream made up of 3 mass% alumina and 97% by mass of water is passed through the opening 2 into the device shown in FIGS. 3, 5 at a speed of 55.7 m / s.
  • the flow of the components passes via the confuser 4 into the flow channel 5, where it strikes the conical part of the holder 42 and the body 34 which is difficult to flow around and passes through the spaces 45. In these sections of the local narrowing of the stream, its speed is maintained equal to 55.7 m / s.
  • the cones 35-41 flow around and pass through the flow channel 5
  • the flow of the components is subjected to a cavitation effect, which ensures its intensive mixing and dispersion.
  • the degree of cavitation of the cavitation fields forming behind the cones 35-41 is maintained in each case 0.65, 0.62, 0.60, 0.57, 0, 54, 0.51, 0.50.
  • the speed of the flow of the suspension formed is 26.5 m / s.
  • the ratio of the speeds V c / V is 2.1.
  • the quality of the suspension produced is judged by the average diameter of the particles obtained. It is 3.8 ⁇ m.
  • the invention will find application in the chemical, petrochemical industry in the production of paints, varnishes, insecticides, lubricating oils; in the fuel industry and energy industry in the preparation of fuel based on masut and heating oils; in mechanical engineering for the preparation of emulsions, lubricants and coolants; in the perfume industry in the production of liquid and cleaning agents, lotions, vitamin preparations; in the food industry for the preparation of liqueurs, fruit juices, alcohol and soft drinks, sauces, dairy products; also in the preparation of photo emulsions, emulsions of oils of various purposes, in the wastewater treatment with chemicals.
EP92903375A 1991-11-29 1991-11-29 Procede et dispositif pour la production d'un systeme libre de dispersion Withdrawn EP0644271A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/SU1991/000251 WO1994013392A1 (fr) 1991-11-29 1991-11-29 Procede et dispositif permettant d'obtenir un systeme a libre dispersion

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EP0644271A4 EP0644271A4 (fr) 1995-03-16
EP0644271A1 true EP0644271A1 (fr) 1995-03-22

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US (1) US5492654A (fr)
EP (1) EP0644271A1 (fr)
WO (1) WO1994013392A1 (fr)

Cited By (5)

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EP0879363A1 (fr) * 1996-02-15 1998-11-25 Oleg Vyacheslavovich Kozyuk Procede et dispositif d'obtention d'un systeme a dispersion libre dans un liquide
WO1999039813A1 (fr) * 1998-02-06 1999-08-12 Oleg Vyacheslavovich Kozyuk Procede et appareil pour l'obtention de systemes de dispersion liquide
WO2001062373A1 (fr) * 2000-02-28 2001-08-30 Locher, Manfred, Lorenz Melangeur par cavitation
CN103611481A (zh) * 2013-11-25 2014-03-05 中国矿业大学 一种水力空化发生装置

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996009112A1 (fr) * 1994-09-21 1996-03-28 Schüler, Rolf Dispositif de production de systemes liquides, notamment d'emulsions, de suspensions ou similaires dans un champ de cavitation hydrodynamique
EP0879363A1 (fr) * 1996-02-15 1998-11-25 Oleg Vyacheslavovich Kozyuk Procede et dispositif d'obtention d'un systeme a dispersion libre dans un liquide
EP0879363A4 (fr) * 1996-02-15 1999-05-06 Oleg Vyacheslavovich Kozyuk Procede et dispositif d'obtention d'un systeme a dispersion libre dans un liquide
WO1999039813A1 (fr) * 1998-02-06 1999-08-12 Oleg Vyacheslavovich Kozyuk Procede et appareil pour l'obtention de systemes de dispersion liquide
WO2001062373A1 (fr) * 2000-02-28 2001-08-30 Locher, Manfred, Lorenz Melangeur par cavitation
CN103611481A (zh) * 2013-11-25 2014-03-05 中国矿业大学 一种水力空化发生装置

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