CN103787278A - Ozone generating system based on bipolar pulse power supply - Google Patents

Abstract

The invention discloses an ozone generating system based on a bipolar pulse power supply, which includes a gas source, an ozone generator and a cooling device, and also includes a bipolar pulse power supply for supplying power to the ozone generator. The bipolar pulse power supply includes a main circuit and control circuit; the main circuit includes: three-phase rectification filter circuit, used to convert three-phase AC voltage into stable DC voltage; IGBT conversion circuit, used to convert DC voltage into pulse voltage; booster circuit, the output terminal is connected with The ozone generator is used to boost the pulse voltage; the control circuit is connected to the IGBT conversion circuit and used to adjust the rectified DC voltage, the output voltage of the IGBT conversion circuit and the pulse frequency. The present invention uses a bipolar pulse power supply as the power supply, which can effectively avoid the oscillation loss of most of the energy of the traditional power supply, improve the energy injection of the reactor, quickly establish a strong electric field, reduce the calorific value of the discharge tube of the ozone generator, and increase the ozone production and Ozone generation energy efficiency.

Description

An Ozone Generation System Based on Bipolar Pulse Power Supply

technical field

The invention belongs to the technical field of ozone application, and in particular relates to an ozone generating system which adopts a bipolar pulse power supply to generate ozone and uses an air source or an oxygen source to generate ozone.

Background technique

Ozone is a non-toxic and strong oxidizing agent with extremely strong oxidizing ability and bactericidal performance. An element acts. Ozone can not only quickly and thoroughly kill harmful bacteria and microorganisms in the air, in water and on the surface of objects, but also realize the functions of decolorization, deodorization and freshness preservation. In addition, ozone can be used as a selective oxidation and quantitative oxidant. Its oxidation temperature is low, and it can undergo strong oxidation at normal temperature and pressure, and the residual ozone after oxidation can be decomposed and reduced to oxygen or oxygen atoms in a very short time. It does not produce secondary pollution, and is a pollution-free, pollution-free, and residue-free oxidation and disinfectant. Therefore, ozone is widely used in organic synthesis, inorganic chemical industry, metallurgy, papermaking, printing and dyeing, food preservation, medical equipment and tableware disinfection, etc., involving all aspects of people's lives.

The power supply and ozone generator are the core and key of the ozone generation system. They have been the focus of ozone technology research and development for decades, and are also the difficulty of high-power ozone generation. The use of bipolar pulse power supply to generate ozone can effectively avoid the oscillation loss of most of the energy in the traditional power supply in the system, so as to effectively improve the energy injection into the reactor. In addition, the pulse discharge technology can quickly establish a strong electric field in the reactor, and the ozone When the generator discharge tube is discharged, the heat generation will be greatly reduced, so that the ozone production and the energy efficiency of ozone generation can be improved.

Contents of the invention

In order to overcome the problem of high ozone energy consumption in the existing ozone generating system, the present invention adopts an ozone generating system based on a bipolar pulse power supply, which can effectively increase ozone production and reduce energy consumption.

A kind of ozone generating system based on bipolar pulse power supply, including gas source, ozone generator and cooling device, also includes the bipolar pulse power supply that supplies power to the ozone generator, described bipolar pulse power supply includes main circuit and Control circuit;

The main circuit includes:

Three-phase rectification filter circuit, used to convert three-phase AC voltage into stable DC voltage;

IGBT conversion circuit for converting DC voltage into pulse voltage;

A boost circuit, the output terminal is connected with the ozone generator, and is used to boost the pulse voltage;

The control circuit is connected to the IGBT conversion circuit, and is used to adjust the rectified DC voltage, the output voltage and the pulse frequency of the IGBT conversion circuit.

Wherein, the gas source is an oxygen source or a dry and clean air source;

Preferably, the three-phase rectification and filtering circuit includes a three-phase bridge fully-controlled rectification circuit and a filtering circuit.

Preferably, the IGBT conversion circuit includes an inverter circuit and an LC series resonant circuit.

Preferably, the three-phase AC voltage enters the three-phase rectification and filtering circuit through a filter.

Preferably, the boost circuit is a transformer.

Preferably, the control circuit includes a single-chip microcomputer control circuit, a control power supply and an IGBT control circuit:

The single-chip microcomputer control circuit is used to provide electrical signals for the control power supply and the IGBT control circuit;

The control power supply is used to amplify the signal of the single-chip microcomputer control circuit and adjust the rectified DC voltage;

The IGBT control circuit amplifies the signal of the microcontroller control circuit, and adjusts the output voltage and pulse frequency of the IGBT conversion circuit.

Preferably, an ozone analyzer connected to the ozone generator is also provided.

Preferably, the ozone generator includes a housing and a discharge tube located in the housing, and the discharge tube and the housing form a barrier discharge reactor.

Preferably, the discharge tube includes a high-voltage pole, a dielectric layer, a high-voltage pole line and a fuse. The medium layer covers the surface of the high-voltage pole, and the two ends of the high-voltage pole line are respectively connected to the high-voltage pole and the bipolar pulse power supply. Between the high-voltage pole line and the high-voltage pole mentioned above.

The ozone generator generates ozone in the form of dielectric barrier discharge. Dielectric barrier discharge occurs between the high-voltage electrode and the shell. The high-voltage electrode and the ground electrode are separated by a dielectric layer. The high-voltage electrode is connected to the bipolar pulse power supply through the high-voltage pole line. Between the high voltage pole and the high voltage pole line is a fuse.

Preferably, the pulse width of the bipolar pulse power supply is 10-200 μs, the pulse frequency is 50-20000 Hz, the pulse width of the bipolar pulse power supply is on the order of microseconds, and the power output is 0-10 kW.

Compared with the prior art, the beneficial effect of the present invention is: the bipolar pulse power supply is used as the power supply of the ozone generating system, and the generation of ozone by the bipolar pulse power supply can effectively avoid the oscillation loss of most of the energy of the traditional power supply in the system, thereby It can effectively increase the energy injection into the reactor. In addition, the pulse discharge technology can quickly establish a strong electric field in the reactor, and the heat generated by the discharge tube of the ozone generator will be greatly reduced, thereby improving the ozone production and ozone generation energy efficiency.

Description of drawings

Fig. 1 is the ozone generating system diagram;

Fig. 2 is the circuit block diagram of bipolar pulse power supply;

Fig. 3 main circuit circuit diagram;

Fig. 4 is the housing figure of ozone generator;

Figure 5 is a diagram of the discharge tube of the ozone generator.

Detailed ways

As shown in Figure 1, a kind of ozone generation system based on bipolar pulse power supply comprises bipolar pulse power supply 11, gas source 12, ozone generator 13, cooling device 14 and ozone analyzer 15, and ozone generator 13 respectively It is connected with bipolar pulse power supply 11, gas source 12, cooling device 14 and ozone analyzer 15.

As shown in FIG. 2 , the bipolar pulse power supply includes a main circuit 9 and a control circuit 10 , and the control circuit 10 includes an IGBT control circuit 5 , a control power supply 6 , a single-chip microcomputer control circuit 7 and an operation interface 8 .

As shown in FIG. 3 , the main circuit 9 includes a three-phase rectification and filtering circuit 1 , an IGBT conversion circuit 2 , and a boost circuit 3 , and the output end of the boost circuit is connected to the ozone generator 4 .

The three-phase rectification filter circuit 1 is composed of thyristors D1-D6, capacitors C1-C2 and inductor L2, the IGBT conversion circuit 2 is composed of insulated gate bipolar transistors V1-V4, inductor L3, and capacitor C3, and the boost circuit 3 is a transformer .

The three-phase AC voltage is sent to the three-phase rectification filter circuit 1 through the switch K1 and the filter L1 to be converted into a stable DC voltage, and the DC voltage is converted into a pulse voltage by the IGBT conversion circuit 2, and the pulse voltage is boosted by the booster circuit 3 Charge the ozone generator.

The control circuit is connected to the IGBT conversion circuit, and is used to adjust the rectified DC voltage, the output voltage and the pulse frequency of the IGBT conversion circuit. The control circuit includes a single-chip microcomputer control circuit, control power supply and IGBT control circuit: the single-chip microcomputer control circuit is used to provide electrical signals for the control power supply and IGBT control circuit; the control power supply is used to amplify the single-chip control circuit signal and adjust the rectified DC voltage; IGBT control The circuit amplifies the signal of the single-chip microcomputer control circuit, and adjusts the output voltage and pulse frequency of the IGBT conversion circuit.

Air or oxygen enters the ozone generator 13 from the gas source 12, and the ozone generator 13 undergoes dielectric barrier discharge under the action of the bipolar pulse power supply 11, and the low-temperature plasma generated by the discharge reacts with air or oxygen to generate ozone, and the cooling device 14 provides The circulating cooling water cools the ozone generator 13, and the ozone-containing tail gas from the ozone generator 13 enters the ozone analyzer 15 to detect the ozone concentration.

As shown in Figure 4, it is the housing diagram of the ozone generator of the present invention, discharge channels are arranged in the housing 16 of the ozone generator, a discharge tube 17 can be placed in each discharge channel, and several discharge tubes 17 can also be placed in series, The discharge tubes 17 in different discharge channels are arranged in parallel.

As shown in Figure 5, it is a diagram of the discharge tube of the ozone generator of the present invention, including a high voltage pole 18, a dielectric layer 19, a high voltage pole line 20 and a fuse 21, the dielectric layer 19 covers the surface of the high voltage pole 18, and the fuse 21 is located between the discharge tube 17 and the fuse 21. Between the high-voltage pole lines 20, the discharge tube 17 and the housing 16 form a dielectric barrier discharge reactor, the housing 16 serves as the ground electrode and the high-voltage pole 18 discharges, and the gap between the dielectric layer 19 and the housing 16 is a discharge channel, and in the discharge channel A large amount of plasma is generated, including free electrons, free radicals, active particles, etc., and these plasmas react with dry and clean air or oxygen to generate ozone.

The following is a specific example of ozone generation using the ozone generating system based on bipolar pulse power supply of the present invention. The gas source is an oxygen source, the flow rate is 5L/min, the peak voltage of the bipolar pulse power supply is 5kV, the peak current is 0.9A, the pulse width is 50μs, and the frequency is 2000Hz. The cooling device provides circulating cooling water to cool the ozone generator, and the ozone A dielectric barrier discharge occurs between the discharge tube of the generator and the shell, and the plasma generated by the discharge interacts with oxygen to produce an ozone-containing tail gas, which enters the ozone detector, and the detected ozone concentration is 145 mg/L. The calculated ozone energy efficiency is 134g/kWh. The ozone generation system based on the bipolar pulse power supply has high ozone concentration and energy efficiency, which can increase the ozone production and reduce the energy consumption of ozone generation.

Claims (10)

1. A kind of ozone generation system based on bipolar pulse power supply, comprise gas source, ozone generator and cooling device, it is characterized in that, also comprise the bipolar pulse power supply of power supply to ozone generator, described bipolar Pulse power supply includes main circuit and control circuit; The main circuit includes: Three-phase rectification filter circuit, used to convert three-phase AC voltage into stable DC voltage; IGBT conversion circuit for converting DC voltage into pulse voltage; A boost circuit, the output terminal is connected with the ozone generator, and is used to boost the pulse voltage; The control circuit is connected to the IGBT conversion circuit, and is used to adjust the rectified DC voltage, the output voltage and the pulse frequency of the IGBT conversion circuit. 2. The ozone generating system based on bipolar pulse power supply as claimed in claim 1, wherein said three-phase rectification filter circuit comprises a three-phase bridge fully controlled rectifier circuit and a filter circuit. 3. The ozone generating system based on bipolar pulse power supply as claimed in claim 1, wherein said IGBT conversion circuit comprises an inverter circuit and an LC series resonant circuit. 4. The ozone generating system based on bipolar pulse power supply as claimed in claim 1, wherein said three-phase AC voltage enters said three-phase rectification filter circuit through a filter. 5. The ozone generation system based on bipolar pulse power supply as claimed in claim 1, characterized in that, said step-up circuit is a transformer. 6. the ozone generating system based on bipolar pulse power supply as claimed in claim 1, is characterized in that, described control circuit comprises single-chip microcomputer control circuit, control power supply and IGBT control circuit: The single-chip microcomputer control circuit is used to provide electrical signals for the control power supply and the IGBT control circuit; The control power supply is used to amplify the signal of the single-chip microcomputer control circuit and adjust the rectified DC voltage; The IGBT control circuit amplifies the signal of the microcontroller control circuit, and adjusts the output voltage and pulse frequency of the IGBT conversion circuit. 7. the ozone generating system based on bipolar pulse power supply as claimed in claim 1, is characterized in that, is also provided with the ozone analyzer that inserts described ozone generator. 8. the ozone generation system based on bipolar pulse power supply as claimed in claim 7, is characterized in that, described ozone generator comprises housing and the discharge tube that is positioned at housing, and discharge tube and housing form barrier discharge reaction device. 9. the ozone generation system based on bipolar pulse power supply as claimed in claim 8, is characterized in that, described discharge tube comprises high-voltage pole, medium layer, high-voltage pole line and fuse, and described medium layer is covered on high-voltage pole On the surface, the two ends of the high-voltage pole line are respectively connected to the high-voltage pole and the bipolar pulse power supply, and the fuse is located between the high-voltage pole line and the high-voltage pole. 10. The ozone generating system based on bipolar pulse power supply as claimed in claim 1, wherein the pulse width of the bipolar pulse power supply is 10-200 μs, and the pulse frequency is 50-20000 Hz.

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