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WO2010119467A1 - Dispositif pour l'introduction de fluides gazeux dans un milieu liquide - Google Patents

Dispositif pour l'introduction de fluides gazeux dans un milieu liquide Download PDF

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Publication number
WO2010119467A1
WO2010119467A1 PCT/IT2009/000483 IT2009000483W WO2010119467A1 WO 2010119467 A1 WO2010119467 A1 WO 2010119467A1 IT 2009000483 W IT2009000483 W IT 2009000483W WO 2010119467 A1 WO2010119467 A1 WO 2010119467A1
Authority
WO
WIPO (PCT)
Prior art keywords
diffuser
panel
gaseous fluid
porous material
resin
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.)
Ceased
Application number
PCT/IT2009/000483
Other languages
English (en)
Inventor
Giuseppe Chitarra
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.)
Ati- Applicazioni Tecnologiche Innovative Srl
Original Assignee
Ati- Applicazioni Tecnologiche Innovative Srl
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 Ati- Applicazioni Tecnologiche Innovative Srl filed Critical Ati- Applicazioni Tecnologiche Innovative Srl
Publication of WO2010119467A1 publication Critical patent/WO2010119467A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23125—Diffusers characterised by the way in which they are assembled or mounted; Fabricating the parts of the diffusers
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23123—Diffusers consisting of rigid porous or perforated material
    • 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
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231261—Diffusers characterised by the shape of the diffuser element having a box- or block-shape, being in the form of aeration stones
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
    • C08J2201/05—Elimination by evaporation or heat degradation of a liquid phase
    • C08J2201/0504—Elimination by evaporation or heat degradation of a liquid phase the liquid phase being aqueous
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to devices for the introduction of gaseous fluids in liquids, and, in particular, it finds application in the waste water and drainage treatment field, as well as in conditioning plants or for water oxygenation and refrigeration. DESCRIPTION OF THE PRIOR ART
  • Modern industrialization involves a continuous exploitation at an intensive level of environmental resources and raw materials, but it has to be able to return to the ecosystem what has not been used or what cannot be used anymore, in a form that is as much compatible with the environment itself as possible .
  • the protection of the water supplies requires that the waste water is treated, before being discharged into watercourses, rivers, or the sea.
  • the large cities, as well as the large industrial settlements, have to provide themselves with suitable depuration plants.
  • Such plants are extended on a large area that is often at the city outskirts, and comprise a series of tanks, each of which having specific functions .
  • the treatment of the waste water or discharge water comprises more steps in sequence-, in order to separate the polluting substances, which are concentrated in the form of muds, from an effluent having such characteristics as to be able to be reintroduced both in the soil and in water basins without compromising the ecosystem.
  • a primary treatment step can be recognized, which mainly comprises processes of a physical nature, such as screening, crushing, or primary settling.
  • the secondary treatment follows, comprising the aerobic bacterial oxidation, also referred to as aeration, and optionally the secondary settling.
  • the tertiary treatment instead, provides for more advanced steps, aimed at reducing the nitrogen and phosphorous content.
  • the treatment with activated carbon allows removing by adsorption the possible dissolved solids. Subsequently, the bacterial load abatement is possible thanks to disinfection treatments, for example, by means of chlorinating agents, or ozone, or weak organic acids.
  • the water depuration process allows reintroducing in the environment, for example, through the discharge into a river or directly into the sea, water that is no more polluted, thereby preserving the typical flora and fauna of the ecosystem.
  • the protection environmental rules impose obligations not only to the community, such as in the case of the conditioning plants for the sewerage water treatment, therefore of civil origin, but also to the firms and private industries, which are required to meet to the costs necessary to the waste water disposal, which costs are often considerable, given the large dimensions and volumes of water that have to be treated and that may range from a few tens to thousands mVday.
  • the traditional conditioning plants comprise one or more waste water or drainage water treatment tanks, within which a stirring system can be placed, to the aim of keeping the liquid under stirring, thereby promoting the treatment processes.
  • One or more air distribution systems are placed in the tanks in which the process of biologic oxidation takes place.
  • Such systems are generally composed of a gaseous fluid source, connected to a compressor conveying air under pressure through a tubing system to one or more membrane diffusers, placed in series after one another, such that a same tube can supply more diffusers.
  • Such diffusers can be anchored to the suppling tube through a clamp saddle, which is located at the opening in the tube wall and matching with the gaseous fluid inlet hole into the diffuser.
  • Such a diffuser is, in turn, composed of a base, usually circular-shaped and in an air- and liquid- impermeable material, coated by an upper membrane that is secured at the edges to said base and having micro-holes.
  • the gaseous fluid entering from the opening then diffuses in the gap between the impermeable base and the upper membrane, and exits in the form of bubbles, having dimensions of 1-3 millimetres, through the upper membrane holes.
  • the upper membrane can withstand only pressures not exceeding 0.8 atmospheres, since it could tear at higher pressures.
  • the membrane Since the membrane is made from a limitedly elastic and quite delicate material, it shall be considered that high operative pressures cause the dilatation of the membrane pores, thereby originating bubbles having larger dimensions.
  • the breaking of one of the diffusers necessarily involves the interruption of the process.
  • an uncontrolled and excessive gaseous fluid leakage from the damaged diffuser would occur, with consequent decrease of the pressure downstream such diffuser.
  • the repair thereof would necessarily require the complete emptying of the tank, which therefore would remain non-operative. All of this causes a considerable lengthening of the times required for the waste water depuration, as well as an increase of the costs.
  • the cleaning of the upper membrane is required, for example, in order to remove debris which could obstruct the pores thereof, it would be necessary to remove the entire diffuser, the cleaning in countercurrent not being possible, since it would be hindered by the lower membrane.
  • the object of the present invention is to provide a device for diffusing a gaseous fluid into a liquid means, such as to completely overcome the drawbacks mentioned with reference to the prior art.
  • Fig. 1 is a schematic view of a diffuser according to the invention
  • Figs. 2A and 2B represent front sections of the diffuser of the invention according to the section plane II'' in accordance with two aspects of the invention described herein below
  • Fig. 3 is a cross-section of the diffuser of the invention according to the section plane IH''' .
  • a diffuser according to the invention is generally indicated with the reference 1;
  • Fig ' . 4 represents a schematic view of a further embodiment of the diffuser according to the invention.
  • Fig. 5 represents a sectional view according to the plane II'' of a detail of the diffuser according to a further embodiment of the present invention.
  • the diffuser 1 comprises gaseous fluid conveying means, indicated with the reference 6 in Fig. 1, and means for diffusing the gaseous fluid in a liquid means which are either connected or connectable to the conveyor means, wherein said diffusion means comprise a panel of porous material 2, said diffuser 1 being suitable to diffuse the gaseous fluid in the liquid means by means of its own porosity and an opening 4.
  • gaseous fluid a gas or a mixture of gases, such as air, which has to be diffused into a liquid means.
  • gases such as air
  • Said “gaseous fluid” can be stored in special containers, defined as “gaseous fluid source”, indicated in Fig. 1 with the reference 7.
  • said panel of porous material 1 is advantageously made from a porous resin. More particularly, said resin is advantageously highly porous, preferably having a density of about 0.9-1 g/cm 3 , and still more preferably it has pores with a diameter from about 6 to 30 microns through which the gaseous fluid exits.
  • Such material therefore, advantageously allows a homogeneous diffusion of the gaseous fluid towards the liquid means, especially through bubbles of dimensions comparable to those of the pores of the resin and, therefore, very fine.
  • the contact surface at the gas-liquid interface that is generated between the gaseous fluid and the liquid means in which the panel 2 is immersed is very high, and it is furthermore higher than the contact surface that there .is in the presence of bubbles characterized by higher dimensions, as occurs, for example, in the devices according to the prior art. Since the contact surface between the gaseous fluid and the liquid means is very large, the depuration activity performed by the fluid is more intense, thereby allowing shortening the times required for the liquid means treatment.
  • the diffuser 1 of the invention also thanks to the material from which the panel 2 is made, can operate up to internal pressures exceeding 5 atmospheres.
  • the mechanical strength and tensile resistance properties ensure, besides a higher general strength of the diffuser, a constant size of the micropores upon time; therefore, the performances of the panel 2 are reproducible upon time.
  • such resin or resin material is •preferably chemically resistant to acids, alkalis,- hypochlorites, civil, agricultural, industrial wastewater, and to seawater.
  • said panel in porous material 2 can be made in different shapes, for example, it can be cubic-, parallelepiped-shaped, or it can be cylinder-shaped, or toroidal, or tube- shaped, the thickness of which can be of about 1-4 cm, or mixed solutions thereof.
  • the panel 2 can be implemented by using a resin having the following percentage weight composition:
  • the panel 2 of the diffuser 1 of the present invention has a sealing (not shown in the Figures) along the entire outer perimeter of the panel 2 and throughout the height of the panel itself.
  • Such sealing has the effect of preventing the gaseous fluid from exiting the panel 2 side walls, which will thus diffuse in the liquid means only through the upper face 11.
  • Said sealing can be of a chemical type, for example, obtained by the application of impermeable materials, adhesives, resins, or it can be implemented through a rubber gasket, for example, of the "O-Ring" type, surrounding the edge of the entire panel 2.
  • the same support plate (5') of the support structure (5) for example, can form an edge facing upwardly, thereby surrounding the panel 2 side walls.
  • conveyor means ⁇ in order to convey the gaseous fluid coming from a source 7 to the panel 2 of the diffuser 1.
  • Such source 7 can be represented by a cylinder in which the gaseous fluid is contained, for instance, under pressure, or it can be represented by the surrounding environment, from which the fluid is taken and preferably conveyed to the panel 2 under pressure, thanks to a compressor
  • Said conveyor means are preferably movable, i.e., they are not anchored to any fixed support, nor, for example, to the tank bottom, and can include one or more tubes in flexible material, departing from the source and entering the panel 2 in the proximity of one or more corresponding openings 4 made in the panel 2 itself.
  • said one or more openings 4 is/are obtained on the lower surface 12 of the panel itself, in a central or non-central position.
  • the means for diffusing the gaseous fluid in the liquid means comprise a distribution circuit 3 realized within said panel 2, comprising one or more ducts and/or grooves extending in a substantially longitudinal direction (not shown in Fig. 1) , fluidically-connected to each other and/or to said opening 4.
  • the gaseous fluid coining from the source 7 arrives to the opening 4, for example, through a conveyor means 6 represented by a connection tube, and homogeneously diffuses within the panel through said distribution circuit 3 represented by ducts and/or grooves.
  • the emission of the microbubbles can take place from the entire upper surface 11 of the panel 2.
  • the thus-obtained diffusion of the gaseous fluid in the liquid means is more homogeneous when compared to the common membrane diffusers.
  • Said conveying ducts and/or grooves can have a shape and cross-section that are different according to the needs; for example, they can be of a circular, or oval or squared or rectangular cross-section.
  • they can be parallel to one another, or they can intersect, thereby originating a grid or can radially depart from the opening 4, or they can be free recesses.
  • Figures 2A and 2B represent two aspects of the invention, wherein the ducts and/or grooves of the conveying circuit have a closed cross- section, i.e., they have a duct surface having an annular cross-section, being entirely realized in the panel thickness (Fig. 2A), or they have an open cross-section, being obtained in the panel 2 lower surface 12 (Fig. 2B) ; in this manner, since said lower surface 12 of the panel 2 resting on the support plate 5, the total duct surface results to be partially defined by said support plate 5.
  • the panel comprising the ducts and/or grooves of the thus-implemented distribution circuit 3 allows the transportation of the gaseous fluid with negligible load losses, even when the gaseous fluid inlet pressure, i.e., detected at the opening 4, is very high, such as of about 8-10 bars .
  • Fig. 2 shows a cross-section of an exemplary embodiment of the distribution circuit 3 comprising ducts and/or grooves within a panel 2 of the invention, in which the ducts and/or grooves, in particular, form a grid.
  • the implementation of the above-described ducts and/or grooves within the panel 2 of the diffuser 1 can take place during the preparation of the resin itself, for example, during the polymerization step or during the casting step of the resin into the mould, by introducing some bodies having suitable dimensions and shape equal to those of the ducts and/or grooves that are desired to be obtained. Once the panel has been formed, these bodies are removed, thereby leaving the ducts and/or grooves within the resin material.
  • the above-described ducts and/or grooves can be realized with suitable means, such as drill tips or mills having suitable dimensions and shapes.
  • the opening 4 will be able to be obtained in the preparation step of the panel 2. by suitably shaping the matrix or obtaining the suitable mouth with a mill.
  • the connection between the gaseous fluid source 7 and said opening 4 this can be advantageously implemented with readily commercially available standard fittings, such as, for example, conventional plastic tubes.
  • the diffuser of the invention 1 can further comprise a support structure 5 suitable to support the panel 2 and to allow the positioning thereof.
  • Said support structure 5 can comprise a support plate 5' , and one or more support elements 10 for said plate.
  • said support plate can be anchored to the panel 2 by means of screws or hooks through the interposition of a gasket, for example, of the "O-Ring" type, or it can bonded thereto by means of two-component, epoxy, or single-component adhesives (for example, the Loctite® product can be used) .
  • the panel 2 and the support plate 5' are kept together by a suitably structured frame, for example, in metal.
  • the support plate 5' comprises one or more openings (not shown in Fig.
  • the diffuser remains spaced from the bottom of the depuration tank in which it is located, for example, it can be spaced by about 4-5 cm, thereby reducing the "dead space", i.e., that portion of liquid means wherein no gaseous fluid is directly introduced and that, therefore, stagnates on the bottom of the tank itself.
  • said support structure 5 can comprise hooking means 9 to move the support structure and, therefore, the panel itself.
  • Said hooking means 9 can be rings placed, for example, at the corners of the support structure 5 allowing to easily place and move the diffuser of the invention also without the aid of machineries.
  • the panel 2 comprises a recess which forms a distribution chamber 13 that is intended to be placed in fluidic communication with the conveyor means 6 and having one or more outlet openings which the ducts and/or grooves of the distribution circuit 3 are connected to, or, alternatively, in direct communication with the porosity of the panel 2.
  • such distribution chamber 13 has a substantially parallelepiped- or curved arch- (in cross-section) shape.
  • such distribution chamber 13 is defined, on one side, by the above- mentioned recess formed in the panel 2 lower surface 12, and, on the other side, by the support plate 5' in which the opening 4 is formed.
  • this configuration wherein the panel (2) of the diffuser (1) has a hemispheric shape or, more generally, a dome shape, is capable of providing a particularly advantageous performance.
  • the panel 2 according to this embodiment has shown to be capable of being able to operate at much higher pressures compared to the traditional panels and also compared to those having a cube-, parallelepiped-, or tubular shape, without being subjected to breaks.
  • the panel will be able to be employed for a higher number of hours without being damaged, thereby allowing reducing the costs and times for the maintenance and repairing.
  • the distribution chamber 13 has a tapered shape towards the opposite side of the plate.
  • the diffuser described can be used in the implementation of depuration plants.
  • the operator can connect the panel opening (s) 4 through the above-described conveyor means 6 to the gaseous fluid source 7.
  • the operator themselves can place one or more or tne diffusers 1 of the invention within the tank.
  • the operation of placing the panels can occur also when the filling of the tank is already underway, or even also when the tank is already full.
  • said diffusers are very lightweight and easy to handle, so as to be able to be moved also by only one technician or operator.
  • the high porosity of the resin material from which the panel 2 is made makes it possible to operate at service pressures that are high and that exceed those allowed by the known systems.
  • the diffusers of the invention allow the introduction of an amount of gaseous fluid in the liquid means that is 4 " to 5 folds that dispensed by a conventional plant, such as, for example, a plant comprising membrane diffusers, in an equal time interval and at equal operative pressures.
  • a conventional plant such as, for example, a plant comprising membrane diffusers
  • a suitable cleaning solution into the panel, i.e., injecting a basic or acidic aqueous solution in the same direction of the gaseous fluid diffusion, which operation can be carried out at the exterior of the tank simply by extracting the panel .
  • the above described diffusers 1 of the invention can be used for the realization of plants useful in many fields, thanks to the high performances and the various advantages above listed. For example, they can be used for the oxygenation of active muds or landfill site percolates, to oxygenate lubricant- refrigerant liquid in the mechanical field or civil drainages .
  • the high oxygen transfer ability ensured by the plant of the invention makes it an irreplaceable technical aid, also in those open sea sites where the conventional plant has no reason of being present, thus allowing, whenever necessary, the integration of air with pure oxygen, ensuring a very high yield due to the microbubbles action.
  • the possibility of anchoring the panels to bearing structures, positioning them at the bottom of the retaining net of the sea fish-farming sites, with extremely rapid times and easy modes contributes to an optimization of the fish-farm yields.
  • the diffusers of the present invention can be employed for the refrigeration of process waters.
  • the current systems provide, for the thermal exchange, the distribution of the liquid on very large surfaces in order to maximize the air-liquid contact surface, which, however, involves machines and structures of notable dimensions, whose efficiency tends to quickly decrease upon time and the maintenance of which is complex and expensive.
  • the diffusers of the present invention allow to multiply the contact surface thanks to the production of millions of microbubbles, in reduced surface units, vastly improving the exchange quality, at the same time offering the possibility to carry out an extremely efficient and rapid maintenance, as well as at definitely lower costs compared to the traditional plants .
  • the shapes of the panels for the uses indicated will be able to be easily determined by the technician in the field, based on the volumes and positions in which they shall be inserted.
  • the diffusers 1 described in the present invention can be used for the realization of plants in the hydromassage sector, and can find application in swimming pools .
  • the diffuser according to the present invention will be able to be advantageously used in tanks for enzymatic treatment, for example, for the denitrification of waste water and process water.
  • the diffuser of the present invention allows diffusing a gaseous fluid in the liquid means in a constant and homogeneous manner.
  • the liquid to be filtered which is coming from a source, passes through conveyor means and suitable means, such as, for instance, the above mentioned distribution circuit, to the panel 2, which passes therethrough thanks to its porosity.
  • suitable means such as, for instance, the above mentioned distribution circuit
  • the collected liquid exiting the panel 2 is free from the corpuscular material initially comprised in the liquid to be filtered, which remains entrapped within the panel 2 itself.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

La présente invention concerne un dispositif pour l'introduction de fluides gazeux dans des liquides. En particulier, ledit dispositif (1) comporte un moyen de transport (6) dudit fluide gazeux et des moyens (4) pour diffuser le fluide gazeux dans le milieu liquide, qui sont ou bien reliés, ou bien qui peuvent être reliés au moyen de transport (6), et ledit dispositif est caractérisé par le fait que lesdits moyens de diffusion comportent un panneau (2) d'une matière poreuse qui est appropriée pour diffuser le fluide gazeux dans le milieu liquide à travers les pores de celui-ci.
PCT/IT2009/000483 2009-04-15 2009-10-27 Dispositif pour l'introduction de fluides gazeux dans un milieu liquide Ceased WO2010119467A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2009A000611 2009-04-15
ITMI20090611 ITMI20090611A1 (it) 2009-04-15 2009-04-15 Dispositivo per l'immisione di fluidi gassosi in un mezzo liquido

Publications (1)

Publication Number Publication Date
WO2010119467A1 true WO2010119467A1 (fr) 2010-10-21

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PCT/IT2009/000483 Ceased WO2010119467A1 (fr) 2009-04-15 2009-10-27 Dispositif pour l'introduction de fluides gazeux dans un milieu liquide

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IT (1) ITMI20090611A1 (fr)
WO (1) WO2010119467A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1015481S1 (en) 2022-01-06 2024-02-20 Wholesale Septic Supplies, LLC Articulating diffuser

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214099A1 (de) * 1991-05-08 1992-11-12 Farnleitner Armin Vorrichtung zum verteilen von gas in einer fluessigkeit
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