Ultrasonic-ozone synergistic oxidation device

Abstract

The utility model relates to an ultrasonic wave-ozone synergistic oxidation device which comprises a reactor body, and an ozone mixing zone, a catalytic dispersion zone, a reaction zone and a reflux zone which are arranged in the reactor body, a water inlet is arranged at the bottom of the reactor body and is connected with the ozone mixing zone through a pipeline, and a bracket is arranged in the ozone mixing zone; an ozone aeration disc is mounted on the bracket and is connected with an ozone generator; the catalytic dispersion area is arranged above the ozone mixing area, an ultrasonic transmitter is mounted in the catalytic dispersion area, an ultrasonic transducer is mounted in the ultrasonic transmitter, and the ultrasonic transducer is connected with an ultrasonic power supply; the reaction zone is arranged above the catalytic dispersion zone and is separated from the reflux zone through a guide cylinder, and an effluent weir is arranged above the reaction zone and is connected with a water outlet. The ozone oxidation reaction efficiency and the ozone utilization rate can be effectively improved, the investment and the treatment cost are saved, the wastewater applicability is higher, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to a water treatment device, specifically an ultrasonic-ozone synergistic oxidation device. Background Technology

[0002] Recalcitrant wastewater refers to wastewater with very low biodegradability, generally with a B / C ratio below 0.3 or even lower. It contains various organic compounds, most of which are inhibitory or toxic to organisms, and the concentration of organic matter is high. Advanced oxidation technologies are generally used to treat wastewater containing recalcitrant organic matter. Commonly used advanced oxidation technologies include Fenton reaction, persulfate (PS) oxidation, wet air oxidation (WAO), and ozone oxidation. Ozone oxidation is widely used due to its strong oxidation capacity, simple process, and lack of secondary pollution.

[0003] The reaction mechanisms between ozone and pollutants mainly include two types: direct ozone oxidation and indirect free radical oxidation, with indirect free radical oxidation being the dominant mechanism. Free radicals require catalytic conditions to be generated rapidly, so catalytic ozone oxidation technology is generally used in engineering applications. Commonly used catalytic technologies include photocatalytic ozone, activated carbon catalytic ozone, and metal catalytic ozone. Photocatalysis has high requirements for water quality, requiring the water to be free of impurities and color. Activated carbon / metal catalytic ozone requires the addition of catalysts, necessitating cleaning and replacement.

[0004] Because ozone is slightly soluble in water, it is generally dispersed in water using aeration discs in engineering. However, the problem of low mass transfer efficiency and low ozone utilization rate still exists, with the ozone utilization rate generally ranging from 25% to 33%.

[0005] In view of the shortcomings of existing catalytic ozone oxidation technology, there is an urgent need for a more efficient oxidation device to improve the applicability of ozone oxidation technology and ozone utilization rate, and reduce treatment costs. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides an ultrasonic-ozone synergistic oxidation device.

[0007] The technical solution adopted in this utility model is as follows:

[0008] An ultrasonic-ozone synergistic oxidation device includes a reactor body and an ozone mixing zone, a catalytic dispersion zone, a reaction zone, and a reflux zone disposed within the reactor body. An inlet is located at the bottom of the reactor body and is connected to the ozone mixing zone via a pipe. A support frame is installed within the ozone mixing zone, and an ozone aeration disc is mounted on the support frame and connected to an ozone generator. The catalytic dispersion zone is located above the ozone mixing zone and contains an ultrasonic transmitter with an ultrasonic transducer connected to an ultrasonic power source. The reaction zone is located above the catalytic dispersion zone and is separated from the reflux zone by a guide tube. An outlet weir is located above the reaction zone and is connected to an outlet located at the top of the reactor body.

[0009] Ultrasound can generate ultrasonic cavitation in water. When combined with ozone oxidation technology, it can fully disperse and dissolve ozone, reducing the amount of ozone added while increasing its oxidation capacity. On the other hand, it can enhance the decomposition of ozone by utilizing the ultrasonic cavitation effect and its physicochemical effects, generating a large number of free radicals and playing a catalytic role.

[0010] Preferably, the ultrasonic transmitter is mounted on a guide rail. The ultrasonic transmitter can move up and down with the guide rail, and the height of the ultrasonic transmitter from the ozone aeration disc can be adjusted by the guide rail to better improve the treatment effect.

[0011] Preferably, the ultrasonic transducer is connected to an ultrasonic power source via a cable.

[0012] Preferably, the ultrasonic transducer has a sound intensity of 3-5 kW / m. 2 Arrangement. This arrangement can effectively enhance the role of ultrasound in the treatment process.

[0013] Preferably, the ultrasonic transmitter is positioned 25–30 cm above the ozone aeration disc. This height setting is more conducive to improving the treatment effect.

[0014] Preferably, the ozone aeration discs are arranged at a density of 3 to 4 discs / m². 2 .

[0015] Preferably, the reactor body is a vertical circular reactor.

[0016] This utility model has a simple structure and reasonable design. Through the rational allocation of each zone, the synergistic oxidation effect of ultrasound and ozone is enhanced. It can not only effectively improve the ozone oxidation reaction efficiency and ozone utilization rate, save investment and treatment costs, but also has stronger applicability to wastewater and a wider range of applications. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Example 1

[0020] Reference Figure 1 An ultrasonic-ozone synergistic oxidation device is disclosed. The device includes a reactor body 1 and an ozone mixing zone 3, a catalytic dispersion zone 6, a reaction zone 10, and a reflux zone 12 disposed within the reactor body 1. The reactor body is a vertical circular reactor. An inlet 2 is provided at the bottom of the reactor body 1, and the inlet 2 is connected to the ozone mixing zone 3 through a pipe. A support 4 is provided in the ozone mixing zone 3, and ozone aeration discs 5 are installed on the support 4. The arrangement density of the ozone aeration discs is 3-4 discs / m². 2 The ozone aeration disc 5 is connected to the ozone generator 15. Above the ozone mixing zone 3 is the catalytic dispersion zone 6, where an ultrasonic transmitter 7 is installed. The ultrasonic transmitter 7 is mounted on a guide rail 9 and can move up and down with the guide rail. The height of the ultrasonic transmitter from the ozone aeration disc can be adjusted via the guide rail to better improve the treatment effect. The height of the ultrasonic transmitter from the ozone aeration disc is 25-30 cm; this height setting is more conducive to improving the treatment effect. An ultrasonic transducer 8 is installed inside the ultrasonic transmitter 7, and the ultrasonic transducer 8 is connected to the ultrasonic power supply 16 via a cable. The ultrasonic transducer is designed with a sound intensity of 3-5 kW / m. 2 Arrangement: This arrangement can effectively enhance the role of ultrasound in the treatment process. Above the catalytic dispersion zone 6 is the reaction zone 10, which is separated from the reflux zone 12 by the guide tube 11. The reflux zone 12, located inside the reactor body 1, generates 3 to 4 times reflux under the action of air lift. Above the reaction zone 10 is the effluent weir 13, which is connected to the effluent outlet 15. The effluent outlet 15 is located at the top of the reactor body 1, with water entering from the bottom and exiting from the top.

[0021] During operation, wastewater enters the ozone mixing zone 3 through the inlet 2 at the bottom of the reactor body 1. The ozone generator 15 is turned on, and ozone is transported through pipes to the ozone aeration disc 5 installed on the support 4 and released into the water to mix with the water, forming a mixed liquid that enters the catalytic dispersion zone 6. The ultrasonic power supply 16 is turned on, and the ultrasonic transducer 8 converts electrical energy into ultrasonic waves, which are transmitted to the catalytic dispersion zone 6 through the ultrasonic transmitter 7 to catalytically decompose and disperse the ozone in the mixed liquid. The height of the transmitter 7 from the ozone aeration disc 5 is adjusted according to the effect via the guide rail 9. Ultrasonic waves can generate ultrasonic cavitation effect in water, which, combined with ozone oxidation technology, can fully disperse and dissolve ozone, reducing the amount of ozone added while improving its oxidation capacity. By utilizing the ultrasonic cavitation effect and its resulting physicochemical effects, the decomposition of ozone is enhanced, generating a large number of free radicals. The mixture after passing through the catalytic dispersion zone 6 enters the reaction zone 10. Under the action of air lift, the flow rate of the mixture entering the reaction zone 10 is 3 to 5 times the influent flow rate. The mixture with a flow rate of 2 to 4 times the influent flow rate after passing through the reaction zone 10 enters the return zone 12 through the guide tube 11 and flows back to the ozone mixing zone 3. The mixture with a flow rate of 1 times the influent flow rate after passing through the reaction zone 10 is discharged into the outlet weir 13 and discharged through the outlet 14.

[0022] Example 2

[0023] The wastewater from a paper mill has a COD of 250-300 mg / L and requires further treatment before entering the RO membrane.

[0024] Ultrasonic-ozone synergistic oxidation device reference Figure 1 Reactor body 1 dimensions Made of SS304 stainless steel, the ozone aeration disc is made of titanium alloy, with a diameter of... The arrangement density is 3 units / m 2 The ultrasonic transducer is based on a sound intensity of 5 kW / m 2 Arrangement.

[0025] Wastewater enters the ozone mixing zone 3 through the bottom inlet 2 of reactor body 1, with an inflow rate of 6 m³ / s. 3 At 10:00 AM, ozone generator 15 is turned on, with an ozone dosage of 3.0 kg / h. Ozone is transported through pipeline to ozone aeration disc 5 installed on support 4 and released into the water, mixing with the water to form a mixed solution that enters the catalytic dispersion zone 6. Ultrasonic power supply 16 is turned on, and ultrasonic transducer 8 converts electrical energy into ultrasonic waves, which are transmitted to the catalytic dispersion zone 6 through ultrasonic transmitter 7 to catalytically decompose and disperse the ozone in the mixed solution. The height of transmitter 7 from ozone aeration disc 5 is adjusted to 25 cm using guide rail 9. The mixed solution passing through the catalytic dispersion zone 6 enters the reaction zone 10, with a flow rate of 30 m³ / h under the action of air lift. 3 / h, after passing through reaction zone 10 for 24m 3The mixed liquid flows through the guide tube 11 into the return zone 12 and back to the ozone mixing zone 3, passing through the reaction zone 10 for 6m. 3 The mixed liquor is discharged into the outlet weir 13 and then out through the outlet 14.

[0026] The COD of the reactor effluent is 30-50 mg / L, which meets the requirements for entering the RO membrane. The ozone utilization rate is calculated to be 40-50%.

[0027] Example 3

[0028] The effluent from the wastewater treatment plant of a certain printing and dyeing enterprise has a COD of 300-400 mg / L and needs to be further treated before reuse.

[0029] Ultrasonic-ozone synergistic oxidation device reference Figure 1 Reactor body 1 dimensions Made of SS304 stainless steel, the ozone aeration disc is made of titanium alloy, with a diameter of... The arrangement density is 4 units / m 2 The ultrasonic transducer is based on a sound intensity of 4 kW / m 2 Arrangement.

[0030] Reference Figure 1 An ultrasonic-ozone synergistic oxidation device is described, in which wastewater enters the ozone mixing zone 3 through the inlet 2 at the bottom of the reactor body 1, with an inlet flow rate of 10 m³ / h. 3 At 6:00 h, ozone generator 15 is turned on, with an ozone dosage of 6.0 kg / h. Ozone is transported through pipeline to ozone aeration disc 5 installed on support 4 and released into the water to mix with the water, forming a mixed solution that enters the catalytic dispersion zone 6. Ultrasonic power supply 16 is turned on, and ultrasonic transducer 8 converts electrical energy into ultrasonic waves, which are transmitted to the catalytic dispersion zone 6 through ultrasonic transmitter 7 to catalytically decompose and disperse the ozone in the mixed solution. The height of transmitter 7 from ozone aeration disc 5 is adjusted to 30 cm using guide rail 9. The mixed solution passing through the catalytic dispersion zone 6 enters the reaction zone 10, and the flow rate of the mixed solution entering the reaction zone 10 is 40 m³ / h under the action of air lift. 3 / h, after passing through reaction zone 10 for 30m 3 The mixed liquid flows through guide tube 11 into return zone 12 and back to ozone mixing zone 3, passing through reaction zone 10 for 10m... 3 The mixed liquor is discharged into the outlet weir 13 and then out through the outlet 14.

[0031] The reactor effluent COD is 50-80 mg / L, which meets the enterprise's reuse requirements, and the calculated ozone utilization rate is 42-53%.

[0032] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An ultrasonic-ozone synergistic oxidation device, characterized by: The device comprises a reactor body, an ozone mixing zone, a catalytic dispersion zone, a reaction zone and a reflux zone arranged in the reactor body, a water inlet is arranged at the bottom of the reactor body and connected with the ozone mixing zone through a pipeline, a support is arranged in the ozone mixing zone, an ozone aeration disc is installed on the support, the ozone aeration disc is connected with an ozone generator; the catalytic dispersion zone is arranged above the ozone mixing zone, an ultrasonic wave emitter is installed in the catalytic dispersion zone, an ultrasonic wave transducer is installed in the ultrasonic wave emitter, the ultrasonic wave transducer is connected with an ultrasonic wave power supply; the reaction zone is arranged above the catalytic dispersion zone, the reaction zone is separated from the reflux zone through a flow guide cylinder, a water outlet weir is arranged above the reaction zone, the water outlet weir is connected with a water outlet, and the water outlet is arranged at the upper part of the reactor body.

2. The ultrasonic-ozone synergistic oxidation device according to claim 1, characterized in that: The ultrasonic wave emitter is installed on a guide rail.

3. The ultrasonic-ozone synergistic oxidation device according to claim 1, wherein: The ultrasonic wave transducer is connected with the ultrasonic wave power supply through a cable.

4. The ultrasonic-ozone synergistic oxidation device according to claim 1, wherein: The ultrasonic transducer is arranged according to the sound intensity of 3-5 kw / m 2 arrangement.

5. The ultrasonic-ozone synergistic oxidation device according to claim 1, wherein: The height of the ultrasonic wave emitter from the ozone aeration disc is 25-30 cm.

6. The ultrasonic-ozone synergistic oxidation device according to claim 1, wherein: The arrangement density of the ozone aerator disc is 3-4 / m 2 .

7. The ultrasonic-ozone synergistic oxidation device according to claim 1, wherein: The reactor body is a vertical circular reactor.

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