WO2002020397A1 - Generateur d'ozone a cellule plate - Google Patents

Generateur d'ozone a cellule plate Download PDF

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Publication number
WO2002020397A1
WO2002020397A1 PCT/EP2000/008734 EP0008734W WO0220397A1 WO 2002020397 A1 WO2002020397 A1 WO 2002020397A1 EP 0008734 W EP0008734 W EP 0008734W WO 0220397 A1 WO0220397 A1 WO 0220397A1
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WO
WIPO (PCT)
Prior art keywords
generating apparatus
type
ozone generating
type electrode
cell
Prior art date
Application number
PCT/EP2000/008734
Other languages
English (en)
Inventor
Jan BORGSTRÖM
Original Assignee
Ozonator Limited
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 Ozonator Limited filed Critical Ozonator Limited
Priority to PCT/EP2000/008734 priority Critical patent/WO2002020397A1/fr
Priority to AU2001212705A priority patent/AU2001212705A1/en
Publication of WO2002020397A1 publication Critical patent/WO2002020397A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/10—Preparation of ozone
    • C01B13/11—Preparation of ozone by electric discharge
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2201/00—Preparation of ozone by electrical discharge
    • C01B2201/10—Dischargers used for production of ozone
    • C01B2201/12—Plate-type dischargers
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2201/00—Preparation of ozone by electrical discharge
    • C01B2201/70—Cooling of the discharger; Means for making cooling unnecessary

Definitions

  • the present invention relates generally to devices which generate ozone by applying a high voltage across a gap to create a corona discharge, and more specifically to a new type of flat plate ozone generating cell having a double cell arrangement.
  • Ozone is a very powerful gaseous reactant, and its usefulness has been well established for many years in a wide range of industrial applications. Recently its value in all types of water purification applications has been coming to the fore because of its ability to act as a powerful oxidant, microflocculant and disinfectant without producing toxic side-products.
  • the most widely used method of generating ozone is to flow dry air or oxygen through a narrow gap bordered on one side by a conductive electrode and on the other side by a dielectric electrode (surfaced on the side which faces away from the gap with an electrical conductor). An alternating high voltage is connected across the electrodes, producing a high voltage field across the gap which creates a corona discharge.
  • This discharge which is also known as a "silent discharge” or “cold plasma discharge” and is actually composed of many transient microdischarges, converts a percentage of the gas to ozone.
  • the dielectric is necessary to prevent these microdischarges from becoming arcs between the conductive electrodes, which would rapidly destroy the electrode surfaces.
  • the majority of high quality prior art corona ozone generators have been designed for large-scale industrial-type applications. Today there is a great need in numerous water treatment applications for small stand-alone cells which are very reliable and yet reasonable in cost and easily maintained. Much of the prior art that has addressed this need consists of scaled down versions of previous designs, and because they still retain many of the large-scale design features, are often extremely expensive, and are difficult to assemble and service.
  • Corona ozone generators usually fall into one of two general categories: either the concentric tubular type, in which an elongate annular corona gap is created between a metal tube and a dielectric tube, or the flat plate type, in which a flat corona gap is formed between a metal plate and a dielectric plate. Both types are well known in prior art, with numerous patents having been issued, for designs in both categories.
  • Fig. 1 discloses a flat plate type ozone generator, which involves two essentially flat electrodes 12,30 held in parallel by intermediate spacers 32, defining a corona gap between the flat portions of the electrodes.
  • the electrodes are preferably circular, and the corona cell defined there between is at the perimeter of the electrode pair delimited by an outer shell 14, which is sealed towards the electrodes. At said perimeter the gap of the corona cell is substantially increased, thus defining a distribution area extending around said perimeter.
  • the distribution area is devised with inlet ports 18 for gas in the form of fresh air or oxygen, which gas is first distributed around the distribution area before it flows centripetally through the narrow corona gap towards the center of the corona chamber, where an outlet port 20 is arranged in one or both of the electrodes.
  • the dielectric 28 necessary for the corona discharge is a flat element arranged between, and in parallel with, the flat portions of the electrodes.
  • the dielectric is suspended by said spacers, and is arranged in between the electrodes without contact to any of said electrodes.
  • the dielectric is preferably suspended by the spacers on a few discrete perimeter points, thus allowing gas to flow from one side of the dielectric to the other side.
  • the dielectric is arranged directly attached to one of the electrodes.
  • the proposed solution in us 5,211,919 is a single corona cell, meaning that each generated corona extends between the first and the second electrode, regardless of the space between the electrodes being divided by the dielectric into two gas chambers or not. Therefore, during operation there will always be a different electric potential or phase on the two electrodes of one cell, caused by the alternating current used for the oxygen-to-ozone conversion.
  • One problem associated with the referred to solution is cooling of the generator. A great deal of heat is generated during ozone generation in a corona cell. Heat has a negative effect on the ozone output, and some form of cooling is thus required. The most efficient way of cooling the electrodes is by means of a cooling liquid, which is also one example proposed by the author.
  • a second problem is associated with having different voltage or phase on the outer electrodes. The consequence is that either one or both of the outer surfaces of the electrodes will have to be incapsulated in order to obtain an ozone generator which is safe to handle.
  • a third problem with the proposed solution is associated with the general desire to decrease the gap width. If a corona gap of 0,2 mm is to be divided by a dielectric in half, two gaps of only 0,1 mm will be obtained. Needless to say, it will then be much more difficult to ensure that the same gap width will occur in both gas chambers over the entire corona cell.
  • the corona will also be concentrated to that side. There is thus a risk for coronas to appear on different sides of the dielectrode throughout the corona cell, placing uneven strain on the dielectric. The result is an increased risk for failure due to cracks in the dielectric.
  • a fourth problem is related to gas pressure, in combination with the small corona gap width.
  • an increased gas input pressure is one alternative.
  • the electrode elements In order to prevent the walls from bulging, i.e. the inside surfaces of the corona cell, the electrode elements will have to be made with a certain thickness in order to achieve a desired rigidity.
  • a reduced width of the corona gap is desired. But with a gap width of 0.2 millimetre or less, any gas pressure above atmospheric means that even with a fairly thick second type electrode 101,101 ', its walls will bulge to a degree that is quite significant in relation to the gap width. Since the ozone generator is preferably tuned to operate optimally at the chosen gap width, an increased pressure may actually decrease the ozone output.
  • the present invention relates to an ozone generating apparatus comprising a flat plate double cell arrangement, said apparatus including a first corona cell comprising a first spacing and a first dielectric member arranged between a first pair of conductive surfaces; a second corona cell comprising a second spacing and a second dielectric member arranged between a second pair of conductive surfaces.
  • the invention is characterized in that a first of said first pair of conductive surfaces, and a first of said second pair of conductive surfaces are opposing sides of a first type electrode.
  • said first type electrode comprises two electrically connected electrode elements, which may be connected by a conductive wire, or be arranged in contact with each other with mechanical connection.
  • said first type electrode is a single electrode element.
  • the first type electrode is preferably devised to be connected to an alternating high voltage.
  • the second of said first pair of conductive surfaces is preferably an inner side surface of a first second type electrode, and the second of said second pair of conductive surfaces is preferably an inner side surface of a second type electrode.
  • the second type electrodes are preferably connectable to a common electric potential of equal phase.
  • Said second type electrodes preferably comprise passage means for a fluid cooling agent.
  • Said spacing of each corona cell preferably comprises a first type spacing, delimited by a surface of the dielectric member facing away from the first type electrode and the inner surface of the second type electrode of the respective corona cell.
  • Gas inlet means to the first type spacing of each cell are preferably connected to a common gas inlet.
  • said spacing of each corona cell comprises a second type spacing, delimited by the surface of the first type electrode and a surface of the dielectric member facing said first type electrode of the respective corona cell.
  • Gas inlet means to the second type spacing of each cell are connected to a common gas inlet.
  • First spacing elements are preferably arranged in said first type spacing of each cell, in direct contact with the inner surface of the second type electrode and the surface of the dielectric element delimiting said first type spacing.
  • Second spacing elements are preferably arranged in said second type spacing of each cell, in direct contact with the surface of the first type electrode and the surface of the dielectric element delimiting said second type spacing.
  • each corona cell comprises a gas passage orifice formed in the respective second type electrode, and a first aperture is formed in the first type electrode, said first aperture opposing the gas outlet orifice of both corona cells.
  • Said first aperture preferably has a diameter, which is at least as large as the diameter of said outlet orifices.
  • a second aperture is formed in each of said dielectric member, overlapping said first aperture.
  • Said second aperture preferably has a diameter, which is less than the diameter of the first aperture is.
  • Said first aperture preferably has an inner envelope, said envelope being covered by a dielectric shield.
  • each second type electrode comprises a cooling chamber with input and output cooling agent apertures, said cooling chamber extending over an area substantially corresponding to the corona cell diameter.
  • the ozone generating apparatus preferably comprises a pressure control unit, devised to control and equalize the pressure of gas input to said corona cells and pressure of said fluid cooling agent input to said cooling chamber .
  • Fig. 1 is an exploded perspective view of the flat plate corona cell of the prior art
  • Fig. 2 illustrates schematically an embodiment of the present invention, wherein the center electrode comprises two separate, spaced-apart elements;
  • Fig.3 illustrates schematically an embodiment of the present invention, wherein the center electrode comprises two separate elements arranged in contact;
  • Fig.4 illustrates schematically an embodiment of the present invention, wherein the center electrode comprises one electrode element
  • Fig. 5 illustrates schematically an embodiment of the present invention, wherein the center electrode comprises one thin electrode element
  • Fig. 6 illustrates schematically an embodiment of the present invention, comprising spacing elements in the corona cells
  • Fig. 7 illustrates schematically an embodiment of the present invention, wherein each corona cell comprises two gas chambers divided by the respective dielectric member;
  • Fig. 8 illustrates schematically an embodiment according to Fig. 7, comprising spacing elements in the corona cells
  • Fig. 9 illustrates schematically an embodiment of the present invention, having a distribution chamber at the perimeter of each corona cell;
  • Fig. 10 illustrates schematically an embodiment of the present invention, comprising an opening in the center electrode and the dielectric members
  • Fig. 11 illustrates schematically an embodiment according to Fig. 10, as seen from the front, with circles representing the corona cell perimeter, the center electrode opening diameter, the dielectric member opening diameter, and the outlet opening;
  • Fig. 12 illustrates schematically an embodiment according to Fig. 6 or 8, as seen from the front, with circles representing the corona cell perimeter and the outlet opening, and radial markings representing the spacing elements, and
  • Fig 13 illustrates schematically a preferred embodiment of the invention having a recessed portion for passage of a fluid cooling agent in the second type electrodes, and an arrangement of mounting two double cells together, with coupled passages for a cooling agent.
  • the present invention solves the problems related with the prior art by providing a flat plate ozone generator having a double cell arrangement.
  • a first type electrode is arranged centrally between a pair of second type electrodes.
  • electrode is intended a conductive electrode member, useable for application of an electrical current for the purpose of generating a corona.
  • a first corona cell 102 is thereby defined between a first surface 103 of said first type electrode 100 and an inner surface 104 of one 101 of said second type electrodes
  • a second corona cell 102' is defined between a second surface 103 ' of the first type electrode 100, opposing said first side 103, and an inner surface 104' of the other 101 ' second type electrode.
  • Each corona cell 102, 102' of the double cell ozone generator further comprises a dielectric member 110, 110'.
  • a first dielectric member 110 is positioned between the first type electrode 100 and said one 101 of the second type electrodes in the first corona cell 102.
  • a second dielectric member 110' is positioned between the first type electrode 100 and said other 101 ' of the second type electrodes in the second corona cell 102 '.
  • the suspension arrangement of the dielectric members 110, 110' and the first type electrode 100 is such that there is a first type spacing 129 between the first dielectric member 110 and said one 101 of the second type electrodes, and also a first type spacing 129' between the second dielectric member 110' and said other 101 ' of the second type electrodes, said first type spacing allowing gas to flow between the respective second type electrode 101, 101 ' and the respective dielectric member 110, 110'.
  • a perimeter encapsulation 122 is devised to enclose the respective cell 102, 102' at a perimeter thereof.
  • the perimeter encapsulation is schematically illustrated as a single element surrounding the cells 102, 102', but naturally separate parts for the different cells 102, 102' may be used.
  • the encapsulation 122 is made of an electrically insulating material, and may thus be arranged in direct contact with both the first 100 and the second 101, 101 ' electrode type, and is optionally integrated with said spacer means 105, 105'.
  • center first type electrode 100 is suspended by electrically insulating spacer means 105, 105', electrically separated from the encapsulation 122, whereas the encapsulation 122 is made of a conductive element arranged in contact with, or as an integrated part of, the second type electrodes 101,101 '.
  • At least a portion of said surfaces 103, 103', 104, 104' of the electrodes are essentially flat, and are held in a substantially parallel arrangement together with the dielectric members 110, 110' by spacer means 105, 105', located between the respective second type electrode 101, 101 ' and the respective dielectric member 110, 110'.
  • First spacer means 105 are arranged between the first dielectric member 110 adjacent the first surface 103 of the central first type electrode 100, and the inner surface 104 of said one 101 of the second type electrodes, said first spacer means thus defining a first corona gap width of the first type spacing, relating to said first corona cell 102.
  • Second spacer means 105' are arranged between the second dielectric member 110' adjacent the second surface 103 ' of the first type electrode 100 and the inner surface 104' of said other 101' second type electrode, said second spacer means 105' thus defining a second corona gap width of the first type spacing relating to said second corona cell 102'.
  • corona gap is here meant the distance between the second type electrode 101, 101' and the dielectric member 110, 110' of a corona cell 102, 102'.
  • spacer means 105, 105' control the electrode distance, which is the distance between surfaces 103,103' and 104, 104', respectively, of a corona cell 102, 102' .
  • spacer means 105, 105' are directly devised to control the electrode distance.
  • the position of dielectric members 110, 110' may also be directly controlled by the said spacer means 105, 105', or by separate spacer means.
  • spacer means 105, 105' which are merely schematically illustrated in Figs 2 -10, may be arranged to interact with the first type electrode 100 and the dielectric members 110, 110' on discrete perimeter points, rather than around the entire circumference of the respective corona cell 102, 102', thus providing the capability for gas to flow between the corona cells 102, 102' at the perimeter of the cells 102, 102'.
  • Each corona cell is provided with gas inlet means 106, 106' and gas outlet 107, 107' means. Furthermore, said inlet means 106, 106' are connected to, or devised to be connected to, a single tee 108 for gas supply from a single source. Hence, any pressure variations originating from said source, such as pressure shocks occurring as the gas flow is turned on or of, will be distributed equally to every orifice 109, 109' of said inlet means 106, 106'.
  • the orifices 109, 109 ' of the inlet means 106, 106' are arranged at an outer portion of the respective cell, whereas the outlet means 107,107' preferably have orifices 121,121' at a central position of each cell 102, 102'.
  • the inlet means orifices 109, 109' are preferably arranged at the perimeter of the respective circular corona cell, and the outlet means orifices 121, 121 ' at the circular center of the respective cell 102, 102'.
  • the inlet 106, 106' and outlet 107, 107' means are arranged as channels and orifices formed in the second type electrodes 101, 101'.
  • the inlet means 106, 106' are arranged at the center of the respective cell, whereas the outlet means 107, 107' are arranged at said perimeter.
  • the second type electrodes 101, 101' are preferably manufactured in aluminum, stainless steel, or other metal, or as a combination or alloy comprising different metals.
  • the second type electrodes 101, 101 ' are rigid elements which are designed to be essentially unaffected by any foreseeable gas pressure within the corona cells 102, 102'.
  • each second type electrode 101, 101 ' is devised passage means 111, 111 ', e.g. conduits, for a liquid cooling agent, preferably water.
  • a liquid cooling agent preferably water.
  • each second type electrode 101, 101 ' is devised to be connected to an alternating high voltage having the same potential Pj and the same phase. Consequently, the same cooling system can be used for both second type electrodes 101, 101' of the ozone generator, even though the cooling agent is conductive.
  • the second type electrodes 101, 101 ' are grounded, further decreasing the risk of spark -over in an attached cooling system devised to circulate the cooling agent.
  • the first type electrode 100 is not suitable for connection to the same cooling agent as the second type electrodes 101, 101 ' as previously explained.
  • the corona triggered oxygen-to-ozone conversion between a conductive surface and a dielectric surface will be concentrated to the area of the corona gap closest to the conductive surface, which is also where most of the heat will be generated.
  • the conductive surface 104, 104' delimiting each respective corona gap is a cooled second type electrode 101, 101 ', generated heat is effectively taken care of.
  • the center first type electrode 100 is preferably left uncooled.
  • the center first type electrode 100 is separately cooled by a non-conductive agent, e.g. by circulating oil or air in channels formed in said first type electrode 100.
  • the double cell ozone generator body does not have to be electrically shielded, and is therefore easy to handle and operate;
  • the center first type electrode 100 comprises a pair of first type electrode elements 100', 100", which are electrically connected to each other. During operation the first type electrode 100 pair 100', 100"are devised to be coupled to the same high voltage potential P2.
  • the electrical connection is achieved e.g. by a conductive wire, as indicated in Fig. 2, or by placing the sides of the respective first type electrode elements 100', 100"opposing the respective dielectric member 110, 110' in direct contact with each other, as indicted in Fig. 3.
  • the first type electrode 100 contains only one electrode element, having opposing sides 103, 103' facing the respective dielectric member 110, 110'.
  • the embodiments illustrated in Figs 2-4 provide capability of cooling the first type electrode 100 separately, e.g.
  • a non-conductive fluid cooling agent such as oil, or by blowing air
  • Said cooling agent can also be circulated through channels in the single first type electrode elements 100', 100 "arranged in contact with each other, or a single first type element 100.
  • the center electrode 100 of the first type is a single element, and is left uncooled. It is also made quite thin -with the proposed solution a thickness of a couple of microns is possible, although any desired thickness there above is possible.
  • a thickness of a couple of microns is possible, although any desired thickness there above is possible.
  • the inlet means 106, 106' to the two cells being connected, or being devised to be connected to, the same gas supply source, any pressure variation occurring in one cell 102 will also occur in the other cell 102'. This way pressure compensation is achieved. As a consequence, there is no resulting force acting perpendicularly on any side of the respective dielectric members 110, 110', whereby the risk for damage to the dielectric members 110, 110' is clearly minimized or eliminated.
  • an aperture 112 is made in the central first type electrode 100.
  • an aperture 114, 114' is made also in the dielectric elements 110, 110'.
  • the total surface area of the first type electrode 100 is decreased.
  • the capacitance is decreased in the corresponding amount.
  • the impedance is decreased, whereby power loss in the corona cell 102, 102' during operation is decreased.
  • the speed of the gas flow close to the outlet orifice 121, 121' is significantly higher than at the outer parts of the cell 102, 102', close to the perimeter. Consequently, the productivity in the vicinity of the center is significantly less than at the outer parts, and does not contribute to a great extent to the overall ozone productivity .
  • the center aperture 112 in the first type electrode 100 can be made even larger than the opposing ozone outlet orifices 121, 121 ' in the second type electrodes 101, 101 '.
  • the diameter of the aperture 112 in the first type electrode 100 can be up to 50% of the corona cell diameter 113, which corona cell diameter 113 defines the perimeter limit of the portion where a parallel arrangement of the electrodes is maintained so that a corona can appear during operation.
  • the diameter of the aperture 112 is within 10- 25% of the corona cell diameter 113.
  • the preferred specific or relative size of the aperture 112 in the first type electrode 100 is dependent on other parameters. Such parameters are e.g.
  • apertures 114, 114' are made also in the dielectric elements 110, 110'.
  • Apertures 114, 114' can be of the same size as aperture 112 in the first type electrode 100, but as evidenced by Figs 10 and 11, apertures 114, 114' are in one embodiment slightly smaller in diameter than aperture 112, in order to minimize the risk of spark-over within the cells 102, 102'.
  • the inner envelope of aperture 112 is covered by a dielectric shield.
  • the aperture 112 therein provides a passage between the opposing corona cells 102, 102' of the inventive double cell arrangement.
  • each element 100', 100 will have an aperture 112, 112'.
  • These apertures 112, 112' may be connected through a pipe, or they may be sealed towards each other.
  • Fig 11 shows a front view of a corona cell 102, indicating the cell diameter 113, aperture 112 of the first type electrode 100, aperture 114 of the dielectric member 110 and orifice 121 of the outlet means 107.
  • the respective dielectric members 110, 110' are arranged directly towards opposing sides 103, 103 ' of the first type electrode 100, in mechanical contact therewith.
  • a second type spacing 115 is formed between the first type electrode 100 and each of the respective dielectric members 110, 110' .
  • the second type spacing 115 of the respective corona cell 102, 102' are preferably connectable with gas inlet means 116, 116' to a tee 117 connectable to a common gas supply source.
  • first type spacing between the respective dielectric member 110, 110' and the respective second type electrode 101, 101 ' are also connectable via inlet means 106, 106' to the same common gas supply source as said second type spacings 115.
  • pressure variations originating from said supply source will act on both sides of each dielectric member 110, 110', as well as on both sides of the first type electrode 100.
  • first spacing elements 118, 118' are arranged in the first type spacing between, and in contact with, the respective second type electrode 101, 101 ' and the respective dielectric member 110, 110'.
  • These spacing elements 118, 118' are preferably arranged as ribs in a radial pattern, as illustrated in Fig. 12, and are devised to secure that an even gap distance is maintained throughout the corona cell 102, 102'.
  • the gap distance of this second type spacing 115 is preferably controlled by second spacing elements 119, 119' between, and in contact with, both one side 103, 103' of the first type electrode 100 and the side of the respective dielectric element 110, 110' facing the first type electrode 100.
  • the spacing elements 118, 118', 119, 119' may be conductive or dielectric.
  • the gap distance between the first type electrode 100 and each of the second type electrodes 101, 101 ' is greatly increased at the perimeter of the respective corona cell 102, 102' , thus defining a gas distribution chamber 120, 120', into which said inlet means 106, 106' discharges through orifices 109, 109'.
  • passage means 111 for the cooling liquid in second type electrode 101 comprises as a recessed portion 123.
  • outlet means 107 for ozone preferably leads inside the second type electrode 101 to the perimeter encapsulation 122.
  • the outlet means 107 discharges directly out through the side of the second type electrode 101, as illustrated e.g. in Fig. 2.
  • the recessed portion 123 preferably does not involve the central portion of the second type electrode 101, said central portion including the outlet means 107 and the vicinity thereof.
  • neither inlet means 106, 106' nor outlet means 107, 107' are shown in Fig. 13. As illustrated in Fig.
  • cooling agent apertures 126, 127 are arranged at the perimeter portion of the recessed portion 123, providing the capability of circulating a cooling agent, such as water, through the passage means 111 defined by the recess 123 and the lid 124.
  • An advantage with this embodiment is that it is easy to form complex patterns of cooling ducts as recesses 123 by milling. The ducts are closed when the lid 124 is applied, and this way a cooling agent entered in aperture 126 is forced to run in the pattern determined by the recessed ducts before exiting through aperture 127, which provides the capability of improved cooling.
  • an endless seal 128, such as an O-ring, is arranged to seal the lid 124 towards the second type electrode 101.
  • second type electrode 101 ' is in one embodiment connected to yet another second type electrode 101 " of a second double cell arrangement.
  • the comiected second type electrodes 101 ' and 101 " being connectable to the same electric potential and phase Pi , they are also devised to form a common set of cooling agent ducts through the respective recesses 123 ' and 123 " In the embodiment according to Fig.
  • the recessed portion 123 forms a cooling chamber with a large outer diameter, preferably covering, or almost covering, the entire corona cell diameter 113.
  • the fluid cooling agent preferably water
  • the fluid cooling agent is pressurized to the same degree as the gas input into the corona cells 102, 102'.
  • a pressure control unit (not shown) is coupled both to the gas supply source and the cooling agent system, and including means for obtaining the same pressure in the gas fed to the corona cells 102,102' and the fluid cooling agent fed to the cooling chambers 123, 123',
  • the ozone generator of the present invention is devised, by said pressure control unit, to be operated with an input pressure of both gas and cooling fluid of 3 bar.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)

Abstract

L'invention se rapporte à un appareil générateur d'ozone présentant une structure à double cellule plate. Ledit appareil comporte une première cellule à effet couronne comprenant un premier espacement et un premier diélectrique disposé entre deux premières surfaces conductrices; une seconde cellule à effet couronne comprenant un second espacement et un second élément diélectrique disposé entre deux secondes surfaces conductrices. L'invention se caractérise en ce que l'une desdites premières surfaces conductrices et l'une desdites secondes surfaces conductrices constituent des faces opposées d'une électrode de premier type.
PCT/EP2000/008734 2000-09-05 2000-09-05 Generateur d'ozone a cellule plate WO2002020397A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2000/008734 WO2002020397A1 (fr) 2000-09-05 2000-09-05 Generateur d'ozone a cellule plate
AU2001212705A AU2001212705A1 (en) 2000-09-05 2000-09-05 Flat plate ozone generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2000/008734 WO2002020397A1 (fr) 2000-09-05 2000-09-05 Generateur d'ozone a cellule plate

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WO2002020397A1 true WO2002020397A1 (fr) 2002-03-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20090175A1 (it) * 2009-08-03 2011-02-04 Luigi Civitano Generatore di ozono
US9126832B2 (en) 2006-12-20 2015-09-08 Primozone Production Ab Power supply apparatus for a capacitive load
CN106761451A (zh) * 2017-01-25 2017-05-31 河南理工大学 复杂地质条件煤岩层钻进仿生流纹降阻钻杆及钻进方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211919A (en) * 1992-01-27 1993-05-18 Conrad Richard H Flat plate corona cell for generating ozone
US5435978A (en) * 1991-08-08 1995-07-25 Sumitomo Precision Products Co., Ltd. Plate-type ozonizer
WO2000053529A1 (fr) * 1999-03-05 2000-09-14 Ozonator Limited Generateur d'ozone et un procede de generation d'ozone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435978A (en) * 1991-08-08 1995-07-25 Sumitomo Precision Products Co., Ltd. Plate-type ozonizer
US5211919A (en) * 1992-01-27 1993-05-18 Conrad Richard H Flat plate corona cell for generating ozone
WO2000053529A1 (fr) * 1999-03-05 2000-09-14 Ozonator Limited Generateur d'ozone et un procede de generation d'ozone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9126832B2 (en) 2006-12-20 2015-09-08 Primozone Production Ab Power supply apparatus for a capacitive load
ITFI20090175A1 (it) * 2009-08-03 2011-02-04 Luigi Civitano Generatore di ozono
WO2011015987A1 (fr) * 2009-08-03 2011-02-10 Luigi Civitano Générateur d’ozone
CN106761451A (zh) * 2017-01-25 2017-05-31 河南理工大学 复杂地质条件煤岩层钻进仿生流纹降阻钻杆及钻进方法

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