WO2006035506A1 - n相オゾン発生装置 - Google Patents
n相オゾン発生装置 Download PDFInfo
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- WO2006035506A1 WO2006035506A1 PCT/JP2004/014274 JP2004014274W WO2006035506A1 WO 2006035506 A1 WO2006035506 A1 WO 2006035506A1 JP 2004014274 W JP2004014274 W JP 2004014274W WO 2006035506 A1 WO2006035506 A1 WO 2006035506A1
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- Prior art keywords
- phase
- voltage
- ozone
- ozone generator
- transformer
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- C01B13/115—Preparation of ozone by electric discharge characterised by the electrical circuits producing the electrical 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
- C01B2201/40—Preparation of ozone by electrical discharge using several dischargers in series
-
- 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
- C01B2201/74—Cooling of the discharger; Means for making cooling unnecessary by liquid
- C01B2201/76—Water
-
- 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
- C01B2201/80—Additional processes occurring alongside the electrical discharges, e.g. catalytic processes
- C01B2201/84—Treatment with magnetic fields
-
- 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
- C01B2201/90—Control of the process
Definitions
- the present invention relates to a large-capacity ozone generator that generates ozone gas by supplying a raw material gas mainly composed of oxygen, and more specifically, an n- phase AC power source configuration of an ozone power source and a discharge cell group of the ozone generator
- the present invention relates to an n-phase ozone generator configured to be electrically divided into n discharge cell groups (ozone generation units).
- a conventional large-capacity ozone generator has a configuration as shown in FIG. 10, and a large-capacity ozone generator of about several tens kgZh to several hundred kgZh class has been realized. Using this large-capacity ozone generator, ozone is used in the field of advanced water treatment and pulp bleaching.
- FIG. 10 shows an example of a conventional large-capacity ozone generator with an ozone generation amount of 35 kgZh.
- the conventional large-capacity ozone generator 1100 is equipped with a water tank for cooling, a huge tank (diameter ⁇ 3000 ⁇ , length 4500mm) filled with oxygen source gas, 600 diameters ⁇ 40mm, length 2000mm
- a cylindrical high voltage electrode tube coated with a high voltage electrode 3 is mounted inside the cylindrical glass high voltage tube 5.
- 2000 is a transformer for supplying high voltage to a plurality of cylindrical glass high voltage tubes 5.
- 3000 is a plurality of series rear turtles that suppress the inverter output current.
- 4000 is a single-phase inverter element for outputting a single-phase AC voltage as a direct-current voltage input force.
- 500 0 is a converter (rectifier) for supplying a DC voltage to be input to the inverter.
- 6 000 is an input transformer for blocking the third harmonic due to the load of the three-phase commercial AC power supply and the ozone generator.
- Reference numeral 4100 denotes a drive circuit for driving the inverter element 4000.
- 4200 is a control circuit of the inverter element 4000.
- the 4300 is a computer that commands and manages setting conditions such as the state of the ozone generator and the current output to the inverter.
- Fig. 11 schematically shows the number of tubes that can be mounted when a cylindrical glass tube 5 having a diameter of ⁇ 40 ⁇ is mounted on a 200 mm square cross section.
- Fig. 12 is a characteristic diagram showing the relationship between the inverter command signal and the inverter output waveform.
- a three-phase commercial AC power supply is input to the input transformer 6000, and the output of the input transformer 6000 is converted into a DC voltage by the converter 5000, and the converted DC voltage is converted into an inverter. It is input to element 4000 and converted to an AC voltage of about 1 kHz by inverter element 4000.
- the inverter element 4000 sends the ozone performance condition from the computer 4300 to the control circuit 4200.
- the control circuit 4200 generates an inverter control signal, and sends the predetermined control signal from the drive circuit 4100 to the inverter element 4000 as shown in FIG.
- an AC rectangular voltage synchronized with the pulse is output from the inverter.
- This high voltage AC voltage is applied to the plurality of cylindrical glass high voltage tubes 5 from the high voltage terminal 120 of the large-capacity ozone generator 1100.
- the other low voltage of the secondary voltage is connected to the ground terminal (low voltage terminal) YG of the large-capacity ozone generator 1100.
- This conventional ozone generator 1100 is as shown in Table 1 in terms of performance specifications (specs) of a large-capacity ozone generator of 35 kgZh class.
- the mass ozone generating apparatus the diameter [Phi 3000Paiiotapaiiota, a length of 4000 mm, a very large apparatus to the volume 28 m 3.
- the power source capacity is 452kW and the load power factor is about 30%, so the load current is 150A, the load voltage is 10kV, the load capacity is 1500kVA, and the transformer 2000 is very large.
- the characteristic E shows the characteristic of a conventional cylindrical multi-tube ozone generator with an AC voltage frequency of 1 kHz.
- the discharge resistance characteristics are as shown in 8001a. The larger the capacity, the smaller the discharge resistance (load impedance). For this reason, it is difficult to stably spread silent discharge evenly over a large area of the discharge portion.
- the characteristics of the frequency and the discharge voltage applied to the ozone generator are as shown in FIG.
- the characteristic F solid line
- Characteristic G (dotted line) is the discharge voltage characteristic when the discharge gap length is 0.3 mm and the discharge power density is 0.3 WZcm 2 .
- the lower the frequency the higher the discharge voltage.
- the discharge voltage also increases.
- Conventional shell-and-tube ozone generator the discharge cap length 0. 3- 0. 6 mm approximately, frequency is 1KHz- 3 kHz, the discharge power density ozone is generated issued by setting the conditions of 0. 3WZcm 2 .
- the operation region of FIG. 14 is 8001b, and the discharge voltage is around lOkV.
- the discharge voltage becomes higher than 12 kV, so it is not preferable to set the discharge power density higher than 0.3 WZcm 2 for practical use of the device.
- a plurality of cylindrical glass high-voltage tubes 5 having a diameter of ⁇ 40 ⁇ and a length of 2000 mm are inserted and Volume of conventional ozone generator with ozone generation amount of 7kgZh and conventional ozone generator with ozone generation amount of 70kgZh when operating frequency is 1kHz and discharge power density is 0.3WZcm 2 8003a in Fig. 15 As indicated by 8003b in Fig. 16, the volume was as large as 0.7 m 3 and 56 m 3 respectively.
- the operating frequency is 1 kHz and the power factor of the ozone generator is as bad as 30%
- the discharge capacity becomes very large
- the transformer 2000 and the inverter element 400 0 become very large
- the large-capacity ozone generator is huge. It was a system.
- Japanese Patent Application No. 2002-306941 describes that two rectangular plate electrodes and a dielectric material are interposed between two plate electrodes.
- a large-capacity ozone generator has been proposed in which multiple discharge cells with a discharge space of about 0.1 mm gap are mounted in one chamber.
- a plurality of discharge cell electrodes mounted in a chamber are connected in parallel, and an AC high voltage is applied between the electrodes, so that a uniform gap is formed in the gap portion of each discharge cell via a dielectric.
- a dielectric barrier discharge (silent discharge) is generated, and at the same time, a source gas mainly composed of oxygen gas is put into the chamber, and the gas is evenly passed through a discharge gap with a short gap of 0.1 mm on the outer periphery of the discharge cell.
- a method and structure for taking out a large amount of ozone gas by using a method is shown.
- the operating frequency is set to 10 kHz, and the discharge power density is reduced to 1.
- OWZcm 2 as the discharge voltage is lowered.
- Japanese Patent Laid-Open No. 6-305706 and Japanese Patent Laid-Open No. 7-240268 an n-phase alternating current power source for outputting an n-phase alternating current and n discharge electrodes in a discharge chamber.
- a rod is placed, one end of the discharge electrode rod is set to a regular n-gonal position, an n-phase AC voltage is applied to n discharge electrode rods, and a corona near the electrode rod of each electrode.
- a discharge gas is generated, and a source gas containing oxygen flows along a discharge electrode rod installed in a regular n-square column shape. It has a structure that generates ozone.
- This multi-phase AC multi-electrode corona discharge device is disclosed as being more efficient than the one-phase corona discharge device because planar discharge between the electrodes can be used for ozone generation.
- an n-phase alternating current output device for outputting an n-phase alternating current and n discharge electrode rods arranged in the discharge chamber are used for discharging.
- Set the discharge electrode rod so that one end of the electrode rod is in the position of a regular n-gon, and the discharge electrode rod on the other end is placed close to one apex, that is, in the shape of a regular n-pyramid,
- An n-phase AC voltage is impressed on the discharge electrode rod, and a corona discharge is generated in the vicinity of the electrode rod between each electrode, and the apex of the positive n pyramid shape from the bottom of the discharge electrode rod installed in a regular n pyramid shape
- This multi-phase AC multi-electrode corona discharge device is disclosed as being more efficient than the one-phase corona discharge device because planar discharge between the electrodes can be used for ozone generation.
- a ⁇ -connected (or star-connected) transformer is provided, one end of the secondary side terminal of each transformer is connected to the cylindrical terminal as a common electrode, and the other secondary side terminal is connected to a rod-shaped high-voltage electrode to receive AC high voltage.
- the ozone generator to be applied is shown.
- Japanese Patent Application Laid-Open No. 10-25104 discharge cells in which a plurality of dielectrics and high voltage electrodes are provided on one ground electrode (low voltage electrode surface) are stacked in multiple stages.
- the ozone power source composed of a combination of a three-phase inverter and a three-phase transformer and the discharge cells stacked in multiple stages are divided into three cell groups, and each of the high-voltage electrodes is divided into three phases.
- An AC high voltage is applied.
- an embodiment in which four ozone power sources are connected as an example of supplying a plurality of AC high voltages to one discharge chamber as a power source is shown. It has been shown that by using a three-phase ozone power source, three discharge cells can be driven, the power source can be made compact, the power source can be made compact, and the cost can be reduced.
- an ultra-compact type ozone generator unit 100 shown in FIG. 7 is disclosed!
- 3 is a very thin (thickness of about 100 m or less) high-voltage electrode sandwiched between thin plate dielectrics 5 having a thickness of 1 mm or less.
- 7 is a flat plate electrode, a rectangular low voltage electrode with a width of 20 mm, a length of 500 mm and a thickness of several mm.
- the rectangular low-pressure electrode 7 having a thickness of several millimeters is formed by bonding two etched flat plates, so that the inside of the rectangular low-pressure electrode 7 is configured to take out a water cooling passage and ozone gas.
- a 0.1 mm protruding spacer is provided on both sides of the rectangular low-voltage electrode 7.
- the electrode is designed to take out a plurality of ozone gases from the rectangular discharge space.
- FIG. 7 the water inlet / outlet for cooling the electrode and the ozone gas outlet are not described, but the detailed configuration is described in Japanese Patent Application No. 2002-306941.
- multiple discharge units 100 are installed in one discharge chamber as shown in Fig. 6, and the power supply frequency starts from 3kHz or less as shown in 8002b in Fig. 14. and high frequency of about 6KHz- 20 kHz, of 360 DENDEN force lWZcm density from 0.
- an ultra-compact, large-capacity ozone generator 1100 can be configured with a single unit, which is a fraction of the conventional volume.
- the ozone performance characteristics of the conventional cylindrical multi-tube ozone generator are as follows.
- the maximum ozone concentration is about 220 g / m 3 as shown by 8005 a in Fig. 17.
- the maximum ozone concentration is 340 gZm 3 and 1.5 times higher concentration ozone can be obtained with this type of ozone generator.
- the ozone concentration performance of a large-capacity ozone generator is more important than the maximum ozone concentration in terms of the amount of electricity (ozone yield) required to obtain lkgZh of ozone gas.
- Figure 17 shows the ozone concentration with emphasis on ozone yield.
- the cylindrical multi-tube ozone generator is about 180 gZm 3
- the laminated plate ozone generator is 210 gZm 3 , which can increase the ozone yield by a little less than 20%.
- discharge characteristics A to D at discharge power density of 1.4 WZcm 2 indicate the characteristics of the laminated plate type ozone generator.
- Discharge characteristic E is a characteristic of a conventional cylindrical multi-tube type ozone generator. The frequency is 1 kHz and the discharge power density is 0.3 WZcm 2 .
- the maximum capacity is around 1OkgZh as the single unit capacity of this laminated plate type ozone generator.
- increasing the capacity of a single machine adds economic limitations such as an increase in power consumption for generating ozone due to an increase in the discharge power factor and badness, and an increase in the peak current of the load current value. Therefore, a restriction is added to the single machine capacity of the ozone generator.
- the capacity of a single machine is increased, the load impedance of the discharge cell becomes very small, and the control capability of the power supply for stably supplying the amount of ozone generated becomes extremely poor, so the single machine capacity cannot be increased! Problems such as came out.
- ozone water treatment equipment using ozone and ozone pulp bleaching equipment used for pulp bleaching with ozone require ozone of several tens to several hundred kgZh.
- a ozone generator of several hundred kgZh class is configured with a cylindrical multi-tube type ozone generator, it will be a large-scale facility of about 200 m 3 due to the electrode shape.
- the ozone concentration is higher, the ozone concentration is higher, and the pulling force is several tens of kgZh-class. ⁇ ⁇ ⁇ is desired.
- Patent Document 1 Japanese Patent Laid-Open No. 9-59006
- Patent Document 2 Japanese Patent Laid-Open No. 6-305706
- Patent Document 3 Japanese Patent Laid-Open No. 7-240268
- Patent Document 4 Japanese Patent Publication No. 8-22724
- Patent Document 5 Japanese Unexamined Patent Publication No. 7-157302
- Patent Document 6 Japanese Patent Laid-Open No. 10-25104
- Patent Document 7 Japanese Unexamined Patent Publication No. 2001-26405
- Japanese Laid-Open Patent Publication No. 9-59006 is a system in which a plurality of three-phase discharge tubes each having three electrodes formed by a single discharge tube are installed, and the structure of the discharge tube becomes complicated or several tens of times.
- Japanese Patent Laid-Open No. 6-305706, Japanese Patent Laid-Open No. 7-240268, Japanese Patent Publication No. 8-22724, and Japanese Patent Laid-Open No. 7-157302 have a regular n prismatic shape in one discharge tube.
- Japanese Patent Laid-Open No. 6-305706, Japanese Patent Laid-Open No. 7-240268, Japanese Patent Publication No. 8-22724, and Japanese Patent Laid-Open No. 7-157302 have a regular n prismatic shape in one discharge tube.
- Japanese Patent Laid-Open No. 10-25104 discloses a power supply device for an ozone generator using a three-phase current source inverter and a three-phase transformer as an ozone power source. If multiple ozone generators are used, a large-capacity ozone generator can be realized. However, a more compact ozone generator cannot be used to construct a large-capacity power supply of several tens of kgZh class and one lOOkgZh class with a single ozone power source. For this reason, there is a problem that a large-capacity power supply becomes large and a large-capacity ozone device cannot be realized at a lower cost.
- the entire apparatus is very large as a large-capacity ozone generator of several tens of kgZh class and lOOkgZh class, and the apparatus can be realized at low cost. I helped.
- the present invention has been made to solve the above-described problems.
- electricity is supplied to the ozone generator.
- the configuration including the configuration, ozone power supply configuration and control method it is compact.
- the object is to reduce the cost and improve the maintainability of the apparatus.
- the commercial frequency voltage is rectified, the rectified voltage is converted into an alternating voltage of a predetermined frequency by an inverter, and the alternating current of the predetermined frequency is increased by a transformer and a rear tuttle.
- One discharge chamber having a voltage alternating current, an ozone power source that outputs a high voltage and a low voltage converted into a high voltage alternating current, a high voltage terminal that inputs an alternating high voltage of the ozone power source, and a low voltage terminal that inputs a low voltage;
- a large-capacity ozone generator comprising a plurality of laminated flat plate type ozone generator units that are laminated in this discharge chamber and are configured by alternately laminating a plurality of flat plate-like high-voltage electrodes and low-pressure electrodes.
- the ozone power supply converts the rectified voltage into an n-phase AC voltage with a predetermined frequency and outputs an n-phase AC voltage waveform, and an n-phase inverter output from the n-phase inverter.
- N converters that convert voltage into n-phase high-voltage AC voltage, n-phase transformers, n-phase transformers that output n-phase high-voltage AC voltage, and n high-voltage terminals A plurality of stacked flat plate type ozone generator units are electrically divided into n pieces within a discharge chamber, and one zozo is composed of one low voltage terminal that outputs a low voltage having a common potential.
- the high voltage electrodes of the ozone generator unit are set to the same high voltage potential, and n high voltage electrode terminals from each ozone generator unit and one low voltage electrode terminal common to all the low voltage electrodes of the ozone generator unit are provided. Connect the n high voltage terminals of the ozone generator unit to the n high voltage terminals of the ozone power supply output and one low voltage electrode of the ozone generator unit to one low voltage terminal of the ozone power output. By connecting the terminal The AC discharge of n-phase is generated at each ozone generating unit, in which so as to generate ozone.
- the ozone power source is provided between the n-phase transformer and the plurality of ozone generation units, and includes the i low-voltage electrode terminals and the n zozos that share all the low-voltage electrodes of the ozone generation unit.
- Each of the generator units is equipped with n rear tuttles connected in parallel.
- the ozone power supply is equipped with a time divider that can divide evenly from 3 phases to n phases, and by inputting a specified phase number signal from the external signal to the time divider, By commanding the divided signal to the inverter, it is possible to variably control to any phase while maintaining stepwise equilibrium from the 3 phase to the n phase.
- the n rear tuttles or n transformers of the ozone power source are U-shaped cores in which a transformer coil or a rear tuttle coil is wound around the opposite side of the I-shaped core having a polygonal cross-sectional shape. Or, a plurality of L-shaped cores are closely attached to form n transformers or n reactors, and the coils of the n transformers or n rear tuttles are connected in a delta connection or a star connection. It is.
- the n rear tutors or n transformers of the ozone power source can be configured so that the U-shaped core L or the L-shaped core 1 that is in close contact with the opposite side of the polygonal I-shaped core 1 can be freely attached and detached.
- the transformer with the n-phase transformer or rear tuttle configuration can be changed to a three-phase / n-phase transformer or rear tuttle configuration.
- a fuse or a circuit breaker is provided between n high voltage terminals of the ozone power source and n high voltage electrode terminals of the ozone generator unit.
- a current detector is provided in each of the output parts of the n high voltage terminals of the ozone power source, and if there is a phase in which the current value flowing in each phase is equal to or greater than a predetermined value, the current greater than the predetermined value is Electricity is cut off from the flowing phase, and it operates with n-1 phase.
- a voltage detector is provided in each of the output part of the n high voltage terminals and the low voltage potential output part of the ozone power source, and the voltage value covering the low voltage potential and each phase is equal to or less than a predetermined value. If there is a phase, the phase having a voltage equal to or lower than the predetermined value is electrically cut off, and the operation is performed with n ⁇ 1 phase.
- the n-phase AC discharge is generated in each ozone generator to generate ozone.
- An ozone generator can be realized, and a device that is compact and very inexpensive can be obtained. Also
- Each n-phase ozone generation unit is equipped with a parallel rear tutor, and the load power factor is improved by parallel resonance between the ozone generation unit and the parallel rear tuttle. Has the effect of reducing the
- the rear tuttle and transformer that are accessories of the ozone generator have a U-shaped core in which a transformer coil or a rear tuttle coil is wound around the opposite side of the I-shaped core having a polygonal cross-sectional shape.
- N transformers or rear A tuttle is constructed, and the transformer or rear tuttle is constructed by connecting the n transformers or the rear tutor coils in a ⁇ connection or a star connection, so the rear tuttle and the transformer can be made very small.
- a time divider capable of equally dividing time from 3 phases to n phases is provided, and by inputting an external signal force designation phase number signal to this time divider, the time divider can By instructing the inverter with a signal that is divided in equal time, it is possible to variably control to any phase from the 3 phase to the n phase while maintaining the balance in steps.
- the U-shaped core or L-shaped core that is in close contact with the opposite side of the polygonal I-shaped core can be easily attached or removed.
- phase ozone generation units can be easily disconnected.
- the current value or voltage of the ozone generation unit for each phase can be monitored to automatically detect the defective ozone generation unit and remove the defective ozone generation device. Even if a part of the generator unit breaks down, it can be easily restored simply by cutting off the connection of the failed phase, and the large-scale system can be restored in a very short time.
- FIG. 1 is a circuit configuration diagram showing an outline of the entire system of an n-phase ozone generator constituted by a six-phase inverter, a rear tuttle, and a six-phase transformer in Embodiment 1 of the present invention.
- FIG. 2 is a main circuit and gate signal circuit diagram of an n-phase inverter according to Embodiment 1 of the present invention.
- FIG. 3 is a system configuration diagram showing a detailed configuration of each component of the n-phase ozone generator in Embodiment 1 of the present invention.
- FIG. 4 is a characteristic diagram showing the command signal and inverter output waveform of the n-phase inverter of the present invention.
- FIG. 5 is a block diagram showing an inverter control system for arbitrarily varying the number of phases of the inverter according to the second embodiment of the present invention.
- FIG. 6 is a structural view showing a laminated flat plate type ozone generator in an embodiment of the present invention.
- FIG. 7 is a schematic configuration diagram of a laminated plate type ozone generating unit in an embodiment of the present invention.
- FIG. 8 is a structural diagram showing an n-phase transformer and a rear tuttle in Embodiment 3 of the present invention.
- FIG. 9 is a structural diagram showing an n-phase transformer and a rear tuttle attaching / detaching mechanism according to Embodiment 4 of the present invention.
- FIG. 10 is a system configuration diagram showing a schematic configuration of a conventional large-capacity ozone generator.
- FIG. 11 is a structural diagram showing an electrode structure of a conventional ozone generating unit.
- Figure 12 shows the inverter command signal and inverter output waveform diagram of the conventional ozone generator.
- Fig. 13 is a characteristic diagram showing the relationship between the ozone capacity of the ozone generator and the discharge load resistance.
- Fig. 14 is a characteristic diagram showing the relationship between the operating frequency of the power source of the ozone generator and the applied load voltage.
- FIG. 15 is a characteristic diagram showing the volume characteristics of an ozone generator with an ozone generation amount of 7 kgZh.
- FIG. 16 is a characteristic diagram showing the volume characteristics of an ozone generator with an ozone generation amount of 70 kgZh.
- FIG. 17 is a characteristic diagram showing the ozone performance of the ozone generator.
- FIG. 1 is a circuit configuration diagram showing an outline of the entire system of an n-phase ozone generator configured by an n-phase inverter, a rear tuttle, and an n-phase transformer in Embodiment 1 of the present invention
- FIG. 2 shows Embodiment 1 of the present invention.
- the main circuit and gate signal circuit diagram of the n-phase inverter in Fig. 3 is a system configuration diagram showing the detailed configuration of each component of the n-phase ozone generator in Example 1 of the present invention
- Fig. 4 is the n-phase inverter of the present invention.
- FIG. 6 is a characteristic diagram showing an inverter command signal and an inverter output waveform.
- 100a-100f is six ozone generator units
- 1100 is a six-phase (n-phase) ozone generator, and consists of six laminated plate type ozone generator units 100, This is an example of a large-capacity ozone generator with an ozone generation amount of 70 kgZh.
- 1500 consists of 6 fuser units 100a—6 fuses or circuit breakers 15a—
- 2000-a is a parallel rear tutor with six parallel rear tutors 201a-201f that also improves power factor by resonating with six ozone generator units 100a-100f.
- Block 2000-b is a six-phase (n-phase) transformer block consisting of six transformers 202a-202f for supplying high voltage to each of the six ozone generator units 100a-100f
- 3000 is an inverter
- a series rear tuttle block consisting of 6 series rear tutors 3 01a-301f that suppress output current
- 4000 is a 6-phase (6 phase elements consisting of 6 inverter elements 401a-401f for outputting 6-phase voltage from DC voltage input)
- n-phase) inverter element block 5000 is a converter (rectifier) block composed of a plurality of converters (rectifiers) 5100 and 5200 for supplying DC voltage to be input to each inverter element 401a-401f.
- 6000 is an input transformer block with multiple input transformers 6100a, 6100b, 6200a and 6200b to cut off the 3rd harmonic due to the load of commercial AC power supply and ozone generator
- 4100 is 6 phase ( n-phase) Inverter drive circuit for driving the inverter element block 4000
- 4200 is the control circuit for the 6-phase (n-phase) inverter element block 4000
- 4300 is for setting the status of the ozone generator and the current output to the inverter, etc. It is a computer that performs the statute and management.
- XI and X2 are DC voltage input from converter (rectifier) block 5000, Yl, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, and ⁇ 6 are 6-phase ( ⁇ -phase) transformer block 2000-b 6-phase (n-phase) high voltage It is an AC voltage output and is connected to n high voltage terminals that output this n-phase high voltage AC voltage.
- YG is a common low voltage (ground) of 6-phase AC voltage, and is connected to a low voltage terminal that outputs one low voltage that has a common potential for n high voltages.
- Dial 1 D6f2 indicates a plurality of diodes provided for each gate command signal of each inverter element 401a-401f
- 41a-46b indicate a plurality of power transistors provided for each inverter element 401a-401f.
- the ozone generators shown in Figs. 1 and 3 the water cooling mechanism of the ozone generator, the supply structure of the raw material gas, and the ozone gas extraction mechanism are naturally necessary, but they are not directly related to the present invention. Is not listed.
- Reference numeral 120 denotes a high voltage terminal for supplying six phases (n phases) of high voltage AC voltages having different phases to each of the six ozone generation units 100a to 100f.
- commercial AC power is input to the input transformer block 6000 to supply voltage to the ozone generator.
- the commercial AC power supply and the ozone generator are electrically separated, so that the ON / OFF of the inverter of the ozone generator and the harmonic components from the ozone generator are not superimposed on the commercial AC power supply. It plays the role of cutting.
- Converter (rectifier) block 5000 receives the secondary voltage of human power transformer block 6000 and rectifies it into a DC voltage.
- the DC voltage from converter block 5000 is input to 6-phase (n-phase) inverter element block 4000.
- a predetermined current and frequency (cycle) command is input from the computer 4300 to the control circuit 4200.
- the control circuit 4200 a 6-phase (n-phase) pulse waveform having a predetermined cycle and divided into 6 phases (n-phase) is generated, and a signal is sent to the inverter drive circuit 4100.
- the output is increased to the output for driving each inverter element 401a-401f, and an ON-OFF pulse is sent to the inverter drive circuit 4100.
- the gate signal circuit of the 6-phase (n-phase) inverter element block 4000 is as shown in Fig. 2. al, a2, bl, b2, cl, c2, dl, d2, el, e2, fl, f2
- the NORORES waveform shown in Fig. 4 is input.
- al is a phase 0, and an ON signal is input to the gate circuit of the power transistor 41a of the inverter element 401a via the diode Dial with a predetermined pulse width, and the diode D2al is used to input the ON signal.
- the ON signal is also input to the gate circuit of the power transistor 42b of the next inverter element 401b, and when the power transistors 41a and 42b become conductive, a + voltage is applied between yl and y2 during the pulse width period. Is done.
- the ON signal is input to the gate circuit of the power transistor 41b of the inverter element 401a via the diode Dla2 and the ON signal is input to the gate circuit of the next inverter element 401b via the diode D2a2.
- the ON signal is also input to the gate circuit, and the power transistors 41b and 42a become conductive, so that a voltage is applied between the pulse width and yl-y2.
- the above al and a2 gate signals are alternately turned on and off at a predetermined period T, and an alternating square wave voltage force inverter with period T is output between yl and y2.
- the alternating current rectangle with the phase t shifted from the alternating current rectangular wave voltage waveform between yl and y2 by alternately turning on the power transistors 42a and 43b of the inverter elements 401b and 401c and turning on the power transistors 43a and 42b alternately.
- a wave voltage waveform is applied between y2 and y3.
- an alternating rectangular wave voltage waveform with a phase force shifted by 3 ⁇ 4 is applied between y3 and y4, between y4 and y5, and between y6 and yl.
- the rectangular AC voltage waveform is the L component of the series rear tuttle and transformer.
- the 6-phase (n-phase) high-voltage waveform Yl close to the sine wave appears on the secondary side of the 6-phase (n-phase) transformer block 2000—b.
- the primary side of the 6-phase ( ⁇ -phase) transformer block 2000-b has a circulation connection so that the DC voltage is evenly superimposed and the voltage applied to the inverter is made as low as possible to suppress the withstand voltage of the inverter. .
- the secondary side outputs a 6-phase (n-phase) high-voltage waveform with a star connection to make the low-voltage potential (ground) common.
- the six-phase (n-phase) high-voltage waveform Yl, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, and ⁇ 6 can be cut off for every six ozone generator units 100a-100f.
- the voltage is supplied from the high voltage terminal 120.
- the low-voltage electrode is returned to the transformer block 2000-b by YG as a common potential (earth) with the device casing.
- the parallel rear tuttle block 2000 a cocoon, six (n) identical reactors 201a-201f are arranged, and the six-phase (n-phase) transformer block 2000 is arranged.
- each rear tuttle 201a-201f Connected between the high-voltage output side of the secondary side of b and the low-voltage potential (earth), each rear tuttle 201a-201f is inserted in parallel with each ozone generator unit 100a-100f. Since the load of the ozone generator unit 100 is formed of a dielectric material, it is a capacitive load, the load is an advanced load, and the power factor is as low as about 20%.
- the ozone generator unit 100 is designed to supply, for example, 10 kW of power, the power factor is low, so a power supply of approximately 50 kVA capacity is supplied to one ozone generator unit 100. You must be able to do it.
- Transformer block 2000—b and inverter block 4000 must be designed with large capacities, resulting in a problem that the weight and volume become very large at the same time as manufacturing costs. This problem becomes more serious as the volume of ozone generator becomes larger.
- a parallel IJ reactor block 2000—a is provided on the secondary phase J of the 6-phase (n-phase) transformer block 2000—b, and the parallel IJ reactor blocks 201a, 201b are provided.
- 201 c, 201d, 201e, 201f and 6 (n) ozone generator units 100a—lOOf are connected to each other in parallel to improve power factor and improve 6-phase (n-phase) )
- the power factor of transformer block 2000-b and inverse tough lock 4000 is improved, and very compact transformer block 2000-b And an inverter block 4000 can be realized.
- This 6-phase (n-phase) parallel resonance is a single unit ozone generator unit that uses load current more effectively than parallel resonance, so it can be designed to be smaller than a single-unit resonance rear tutor. There is.
- the power supply voltage can be designed to be low and the current value flowing through the rear tutor can be reduced, so the series rear tuttle is advantageous in terms of cost.
- Example 3 will be described with reference to FIG.
- This Example 3 is equipped with a time divider that can divide evenly from 3 phases to n phases, and by inputting a specified number of phases signal to the time divider from the external signal cover, the time divider force is also divided equally. By instructing the signal to the inverter, it is possible to variably control to any phase while maintaining the balance from 3 phase to n phase in steps.
- Fig. 5 shows the frequency of the ozone generator in the computer 4300.
- the computer 4300 calculates the phase time t from the period T and the n phases input to the inverter element block 4000, and the control circuit 4200 and inverter drive circuit 4100 This shows the calculation of the inverter drive command corresponding to the inverter element 401 of each phase.
- 9001 is an input signal of frequency F
- 9002 is an input signal of phase number n
- 9100 is a calculation block.
- the calculation block 9100 includes a calculation block 9110 for a period T, a calculation block 9120 for a phase time t, and a calculation block 9130 for a phase interval corresponding to the number of phases.
- the calculation processing for controlling the phase balance by changing the number of phases is omitted.
- the inverter element 401 Only a part of the inverter element 401 can be operated. It is what I did. In this way, by calculating the phase interval according to the number of phases using a computer, etc., and enabling the inverter to operate with an arbitrary number of phases, the inverter itself can always be operated with a balanced load. By changing the number of phases, the load balance of the ozone generator becomes unbalanced, and there is no need to worry about worsening the power supply cannula.
- a time divider that can equally divide time from 3 phases to n phases is provided, and by inputting a specified phase number signal from an external signal to the time divider, the signal divided by the time divider force is also given to the inverter. By commanding, it is possible to variably control to any phase while maintaining the balance in stages from the 3 phase to the n phase.
- Figure 8 shows power factor improvement by resonating with 6-phase (n-phase) series reactor 3000, 6-phase (n-phase) transformer 2000-b that boosts 6-phase (n-phase) AC voltage, and an ozone generator load.
- a structural diagram of a six-phase (n-phase) parallel rear tuttle 2000-a that performs the above is shown.
- 21a-21f represents the coil part of the 6-phase (n-phase) transformer or rear tuttle.
- 22a-22f shows a U-shaped or L-shaped core part of a 6-phase (n-phase) transformer or rear tuttle.
- 23 shows an I-type core with a hexagonal cross section.
- 29 shows a band connecting the U-type or L-type cores 22a-22f and the I-type cores 23.
- a 6-phase (n-phase) transformer and rear tuttle are formed.
- Example 5 it is possible to reduce the size of the 6-phase (n-phase) transformer by configuring it as an integrated 6-phase (n-phase) transformer.
- Example 5 will be described with reference to FIG.
- Figure 9 shows power factor improvement by resonating with 6-phase (n-phase) series reactor 3000, 6-phase (n-phase) transformer 2000-b that boosts 6-phase (n-phase) AC voltage, and an ozone generator load.
- 6-phase (n-phase) parallel rear tutor 2000 Indicates that the number of phases of a can be easily removed and installed.
- Example 5 in the integrated six-phase (n-phase) transformer, the U-shaped or L-shaped magnetic core of the six-phase (n-phase) transformer is stopped and the band 29 is removed.
- the structure in which the magnetic core can be easily removed for each coil 21 is provided, there is an effect that, in particular, the faulty phase transformer can be removed and the system restart of the ozone generator can be accelerated.
- each of the high-voltage terminals 120 of the 6-phase (n-phase) ozone generator unit and the series fuses or circuit breakers 15a to 15f are provided, and the defective ozone generator unit 1 00 And one phase of the inverter element can be cut off.
- fuse or circuit breaker 15a-15f connected in series with each high-voltage terminal 120 of the 6-phase (n-phase) ozone generator unit is connected in series with the secondary high-voltage output terminal of the transformer 2000-b. You may do.
- each phase is automatically operated when the overcurrent flows in the state where the overcurrent flow is interrupted. Will be continued.
- the circuit breakers 15a-15f as shown in Fig. 3, if the computer 4300 forcibly shuts off from the outside via the circuit breaker operating means 4315, the operation without removing the shut-off phase can be continued. .
- Example 7 a current detector (not shown) for detecting current flowing in each part of the 6-phase (n-phase) ozone generator is provided, and the input current of the input transformer, the output current, and the output of the converter Current, inverter element output current, series rear tutor output current, transformer output current, parallel rear tutor current, ozone generator unit current The value is automatically detected by the current detector, the defective part is automatically detected, and the system is stopped or the defective phase is separated. The current value of each part is monitored and it is judged whether there is a force within the specified current range, and the defective part of the input transformer, converter, inverter element of each phase, series rear turtle, transformer, parallel rear turtle, and ozone generator unit is checked. Detects and automatically disconnects the phase that caused the device to stop or malfunction.
- an input transformer input section, output section, converter output section, inverter output section for each phase, series rear turtle section, transformer output section, parallel rear turtle section, current detector in the ozone generator section Input transformer input current value, output current value, converter output current value and inverter output current value of each phase, series rear turtle current value, transformer output current value, parallel rear turtle current value, ozone generator unit current value Is detected at any time, and these current values are loaded into the computer 4300 and monitored for overcurrent exceeding the specified rated conditions or for current below the rated conditions, and current outside the rated current range.
- the parallel Riatatoru unit identifies the fault location of the ozone generator unit unit, to automatically disconnect the phase became stop or malfunction of the device.
- Example 8 a voltage detector that detects the voltage of each part of the 6-phase (n-phase) ozone generator is provided, and the input voltage of the input transformer, the output voltage, the converter output voltage, and the inverter output of each phase
- the voltage detector automatically detects each voltage value of the voltage, series rear turtle, transformer input voltage, transformer output voltage, parallel rear turtle, and ozone generator unit voltage. It is intended to isolate the phase of a stop or malfunction. Monitor the voltage value of each part and judge whether it is within the specified voltage range or not, and detect defective parts of the input transformer, converter and inverter elements of each phase, series rear turtle, transformer, parallel rear turtle, and ozone generator Or stop the device or The phase that has failed is automatically separated.
- the voltage at each part of the system is monitored at any time, the faulty part is immediately identified, and the phase where the equipment stopped or malfunctioned is automatically separated. Effective for quick equipment repair and re-operation. Also, by monitoring both current and voltage at each location as needed, the failure location can be identified earlier.
- n-phase ozone generator of the present invention can be applied to advanced water treatment of sewage requiring a high concentration and a large volume of ozone, and a large volume ozone generator in the field of pulp bleaching.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/581,044 US7744825B2 (en) | 2004-09-29 | 2004-09-29 | N-phase ozone generator |
JP2006537607A JP4627532B2 (ja) | 2004-09-29 | 2004-09-29 | n相オゾン発生装置 |
EP04788340A EP1795500A4 (en) | 2004-09-29 | 2004-09-29 | N-PHASE OZONE GENERATING APPARATUS |
CN2004800434518A CN1976870B (zh) | 2004-09-29 | 2004-09-29 | n相臭氧发生装置 |
PCT/JP2004/014274 WO2006035506A1 (ja) | 2004-09-29 | 2004-09-29 | n相オゾン発生装置 |
EP12172289.6A EP2520543B1 (en) | 2004-09-29 | 2004-09-29 | Ozone generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2004/014274 WO2006035506A1 (ja) | 2004-09-29 | 2004-09-29 | n相オゾン発生装置 |
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WO2006035506A1 true WO2006035506A1 (ja) | 2006-04-06 |
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PCT/JP2004/014274 WO2006035506A1 (ja) | 2004-09-29 | 2004-09-29 | n相オゾン発生装置 |
Country Status (5)
Country | Link |
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US (1) | US7744825B2 (ja) |
EP (2) | EP2520543B1 (ja) |
JP (1) | JP4627532B2 (ja) |
CN (1) | CN1976870B (ja) |
WO (1) | WO2006035506A1 (ja) |
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JP5627027B2 (ja) * | 2009-11-26 | 2014-11-19 | 東芝三菱電機産業システム株式会社 | オゾンガス供給システム |
JP2017149597A (ja) * | 2016-02-23 | 2017-08-31 | 株式会社東芝 | オゾン発生装置および電源装置 |
WO2018116335A1 (ja) * | 2016-12-19 | 2018-06-28 | 東芝三菱電機産業システム株式会社 | ガス発生装置 |
WO2019225426A1 (ja) * | 2018-05-21 | 2019-11-28 | 東芝三菱電機産業システム株式会社 | オゾンガス発生システム |
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US8778274B2 (en) | 2009-11-26 | 2014-07-15 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Ozone gas supply system |
JP5627027B2 (ja) * | 2009-11-26 | 2014-11-19 | 東芝三菱電機産業システム株式会社 | オゾンガス供給システム |
WO2011065087A1 (ja) * | 2009-11-26 | 2011-06-03 | 東芝三菱電機産業システム株式会社 | オゾンガス供給システム |
JP2017149597A (ja) * | 2016-02-23 | 2017-08-31 | 株式会社東芝 | オゾン発生装置および電源装置 |
US10879085B2 (en) | 2016-12-19 | 2020-12-29 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Gas generation apparatus |
WO2018116335A1 (ja) * | 2016-12-19 | 2018-06-28 | 東芝三菱電機産業システム株式会社 | ガス発生装置 |
JPWO2018116335A1 (ja) * | 2016-12-19 | 2019-06-24 | 東芝三菱電機産業システム株式会社 | ガス発生装置 |
WO2019225426A1 (ja) * | 2018-05-21 | 2019-11-28 | 東芝三菱電機産業システム株式会社 | オゾンガス発生システム |
JP6657485B1 (ja) * | 2018-05-21 | 2020-03-04 | 東芝三菱電機産業システム株式会社 | オゾンガス発生システム及びオゾンガス発生方法 |
JPWO2019225426A1 (ja) * | 2018-05-21 | 2020-12-10 | 東芝三菱電機産業システム株式会社 | オゾンガス発生システム |
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JP7019872B1 (ja) * | 2021-02-15 | 2022-02-15 | 三菱電機株式会社 | オゾン発生装置 |
WO2022172426A1 (ja) * | 2021-02-15 | 2022-08-18 | 三菱電機株式会社 | オゾン発生装置およびオゾン発生方法 |
JP2022124451A (ja) * | 2021-02-15 | 2022-08-25 | 三菱電機株式会社 | オゾン発生装置 |
JP7154363B2 (ja) | 2021-02-15 | 2022-10-17 | 三菱電機株式会社 | オゾン発生装置 |
Also Published As
Publication number | Publication date |
---|---|
CN1976870B (zh) | 2012-08-29 |
EP2520543A1 (en) | 2012-11-07 |
JP4627532B2 (ja) | 2011-02-09 |
CN1976870A (zh) | 2007-06-06 |
US20070134140A1 (en) | 2007-06-14 |
JPWO2006035506A1 (ja) | 2008-05-15 |
EP1795500A4 (en) | 2010-03-17 |
EP1795500A1 (en) | 2007-06-13 |
US7744825B2 (en) | 2010-06-29 |
EP2520543B1 (en) | 2019-09-18 |
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