An ozone side-stream dosing system for preparing high-concentration ozone water

Abstract

An ozone side-flow dosing system for preparing high-concentration ozone water includes a tap water source, an ozone generator, an ejector, a static mixer, and a circulation tank. The outlet of the tap water source is connected sequentially to a circulation pump and the first end of a first three-way valve via a pipeline. The second end of the first three-way valve is connected to the water inlet of the ejector. The outlet of the ozone generator is connected to the air inlet of the ejector. The third end of the first three-way valve and the outlet of the ejector are both connected to the inlet of the static mixer. The outlet of the static mixer is connected to the circulation tank. This invention aims to reduce the decomposition of dissolved ozone during the preparation of high-concentration ozone water, thereby improving the preparation efficiency of high-concentration ozone water.

Description

Technical Field

[0001] This utility model relates to the field of high-concentration ozone water preparation technology, specifically an ozone side-stream dosing system for preparing high-concentration ozone water. Background Technology

[0002] High-concentration ozone water possesses extremely strong oxidizing properties, effectively degrading E. coli, mold, aflatoxin, vomitoxin, cyanide, and other pollutants in grains. Furthermore, ozone water converts into oxygen after the sterilization reaction, producing no secondary pollution. Therefore, high-concentration ozone water is widely used in grain sterilization processes.

[0003] The preparation of high-concentration ozone water typically consists of an ozone generator and an ozone-water mixing device. The ozone generator produces high-concentration ozone gas through high-voltage discharge. Subsequently, the ozone gas is forcibly mixed with process water used in the grain-moistening process in a grain processing workshop through a dedicated mixing device (such as a Venturi mixer or jet mixer). The core bottleneck affecting the efficiency of high-concentration ozone water preparation lies in whether the ozone gas and the aqueous phase can dissolve efficiently.

[0004] Current mainstream mixing technologies utilize devices such as jet injectors and mixing tanks to mix all process water and ozone. However, due to the large volume and mass of the liquid, it is often difficult to fully mix ozone and liquid in one go. This requires the mixing device to undergo prolonged and intense mechanical action, which can lead to high energy consumption. Furthermore, prolonged mechanical action can raise the liquid temperature, and higher temperatures can drastically accelerate the decomposition of dissolved ozone, thus affecting the preparation of high-concentration ozone. Utility Model Content

[0005] The present invention aims to provide an ozone side-flow dosing system for preparing high-concentration ozone water, thereby reducing the decomposition of dissolved ozone during the preparation of high-concentration ozone.

[0006] To solve the above technical problems, the specific solution adopted by this utility model is as follows: it includes a tap water source, an ozone generator, an ejector, a static mixer, and a circulation tank. The outlet of the tap water source is connected to the circulation pump and the first end of the first three-way valve in sequence through a pipeline. The second end of the first three-way valve is connected to the water inlet of the ejector. The air outlet of the ozone generator is connected to the air inlet of the ejector. The third end of the first three-way valve and the water outlet of the ejector are connected to the inlet of the static mixer. The outlet of the static mixer is connected to the circulation tank.

[0007] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: a one-way valve is installed on the connecting pipe between the ozone generator and the ejector to prevent backflow of gas and liquid.

[0008] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: pressure sensors, pressure gauges and manual ball valves are installed on the pipelines between the tap water source and the circulation pump, between the circulation pump and the ejector, and between the ejector and the static mixer.

[0009] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: a pipe sight glass for observing the fluid flow pattern inside the pipe is installed on the pipeline between the static mixer and the circulation tank.

[0010] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: a gas-liquid separator is installed on the pipeline between the jet injector and the static mixer. The outlet of the gas-liquid separator is connected to the static mixer. The gas outlet of the gas-liquid separator is connected to the circulation tank through a gas pipe. A pressure regulating valve is installed on the gas pipe at the outlet of the gas-liquid separator. A pressure regulating valve, a pressure sensor, and a pressure gauge are installed on the pipeline at the outlet of the gas-liquid separator.

[0011] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: a level gauge is provided on the side of the circulation tank, a tail gas treatment device, an inspection port and a temperature sensor are provided on the top of the circulation tank, a drain port is provided at the bottom of the circulation tank, and manual ball valves are provided on both the feed pipe and the discharge pipe of the circulation tank.

[0012] As a further optimization of the ozone side-stream dosing system for preparing high-concentration ozone water: the circulation tank is connected to the circulation pump through the circulation pipeline.

[0013] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: a flow meter is installed on the pipeline at the outlet of the tap water source, and the tap water source is connected to the circulation tank through a pipeline.

[0014] As a further optimization of the ozone side-flow dosing system for preparing high-concentration ozone water: the circulation tank is connected to the finished water storage tank through a pipeline. A second three-way valve is installed on the pipeline between the circulation tank and the finished water storage tank. The first end of the second three-way valve is connected to the circulation tank, the second end of the second three-way valve is connected to the finished water storage tank, and the third end of the second three-way valve is connected to the inlet of the ozone detection tank. The outlet of the ozone detection tank is connected to the finished water storage tank. An ozone analysis instrument is installed inside the ozone detection tank, and a sampling port is provided on the side wall of the ozone detection tank.

[0015] Beneficial effects: In this invention, the water to be treated is diverted by a circulating pump and a three-way valve, with a portion of the water entering the ejector to mix with ozone generated by the ozone generator. The mixed diverted water then mixes with the remaining mainstream water in a static mixer. This mixing method reduces the amount of water processed in the ejector, avoiding the high energy consumption and increased liquid temperature caused by prolonged and intense mechanical action when handling large volumes and masses of water. This reduces the decomposition of dissolved ozone, improves the efficiency of high-concentration ozone production, and simultaneously enhances the efficiency of the grain sterilization process.

[0016] This invention connects a circulation tank to a circulation pump and a tap water source to the circulation tank, enabling secondary circulation mixing of low-concentration ozone water and dilution of high-concentration ozone water. This allows for the production of ozone water with different concentration gradients, improving the efficiency of preparing high-concentration ozone water and meeting the needs for preparing ozone water of different concentrations. Attached Figure Description

[0017] Figure 1 This is a diagram of the ozone side-stream dosing system for preparing high-concentration ozone water according to this invention;

[0018] The diagram is labeled as follows: 1. Sampling port, 2. Ozone detection tank, 3. Ozone analyzer, 4. Static mixer, 5. Pipeline sight glass, 6. Gas-liquid separator, 7. Pressure gauge, 8. Pressure sensor, 9. Ejector, 10. First three-way valve, 11. Circulation pump, 12. Check valve, 13. Ozone generator, 14. Tap water source, 15. Exhaust gas treatment device, 16. Flow meter, 17. Level gauge, 18. Circulation tank, 19. Finished water storage tank, 20. Second three-way valve, 21. Manual ball valve, 22. Pressure regulating valve, 23. Inspection port, 24. Temperature sensor, 25. Sewage outlet. Detailed Implementation

[0019] An ozone side-stream dosing system for preparing high-concentration ozone water includes a tap water source 14 for providing process water in the grain sterilization process, an ozone generator 13 for generating ozone, an ejector 9 for mixing ozone and water, a static mixer 4 for mixing side-stream water and main stream water, and a circulation tank 18 for further mixing ozone and water and realizing water circulation.

[0020] The outlet of the tap water source 14 is connected in sequence to the circulation pump 11 and the first end of the first three-way valve 10 via a pipeline. The second end of the first three-way valve 10 is connected to the inlet of the ejector 9. The circulation pump 11 provides high-pressure water flow to the ejector, ensuring negative pressure suction at the throat of the ejector 9 to achieve efficient ozone intake. The first three-way valve 10 divides the water delivered by the circulation pump 11 into two streams: the main stream directly enters the static mixer 4, and the side stream enters the ejector 9 to mix with the ozone.

[0021] In this embodiment, the amount of water flowing into the jet injector 9 from the tap water source 14 is 15%-25% of the total water volume of the system. If the water flow rate into the jet injector 9 is less than 15%, the water flow velocity and pressure in the jet injector 9 will be insufficient, making it impossible to stably and adequately mix ozone. Furthermore, the amount of high-concentration ozone water is too small to mix quickly and evenly with the large volume of mainstream water. Although a water flow rate into the jet injector 9 is greater than 25%, it can absorb more ozone, but the excessive water volume requires the jet injector 9 to operate at high power continuously, resulting in high energy consumption of the mixing device. In addition, prolonged and intense mechanical action will raise the solution temperature, leading to the decomposition of dissolved ozone.

[0022] Pressure sensor 8 converts the pressure signal inside the pipeline into an electrical signal, which is displayed by pressure gauge 7. The design of pressure sensor 8 and pressure gauge 7 in the pipeline between water source 14 and circulating pump 11 is as follows: To prevent circulating pump 11 from running dry, pressure sensor 8 and pressure gauge 7 are located in the pipeline between circulating pump 11 and ejector 9. To ensure that the water pressure meets the lower limit of the working pressure of ejector 9, pressure sensor 8 and pressure gauge 7 are located in the pipeline between ejector 9 and static mixer 4. To detect changes in gas-liquid mixing resistance, and to ensure that the pressure difference before and after ejector 9 meets the working pressure difference of ejector 9, manual ball valve 21 can adjust the pressure of each pipeline.

[0023] The outlet of the ozone generator 13 is connected to the inlet of the ejector 9. Under the action of the ejector 9, the ozone generated by the ozone generator 13 is mixed with the side flow water. A one-way valve 12 is provided on the connecting pipe between the ozone generator 13 and the ejector 9 to prevent backflow of gas and liquid.

[0024] The outlet of the jet injector 9 and the third end of the first three-way valve 10 are connected to the inlet of the static mixer 4, where the side flow water and the main flow water are mixed.

[0025] A gas-liquid separator 6 is installed on the pipeline between the ejector 9 and the static mixer 4. The outlet of the gas-liquid separator 6 is connected to the static mixer 4, and the outlet of the gas-liquid separator 6 is connected to the circulation tank 18 through a gas pipe. A pressure regulating valve 22 is installed on the gas pipe at the outlet of the gas-liquid separator 6. The outlet of the gas-liquid separator 6 is equipped with a pressure regulating valve 22, a pressure sensor 8, and a pressure gauge 7. The gas-liquid separator 6 separates the ozone that fails to mix with water in the ejector 9 into the circulation tank 18, where it is further mixed with the fluid. The final exhaust gas is treated by the exhaust gas treatment device 15. The pressure regulating valve 22 adjusts the pressure difference in the gas-liquid separator 6 to separate the bubbles.

[0026] The outlet of the static mixer 4 is connected to the circulation tank 18, and a pipe sight glass 5 for observing the fluid flow pattern in the pipe is installed on the pipeline between the static mixer 4 and the circulation tank 18.

[0027] A flow meter 16 is installed on the pipeline at the outlet of the tap water source 14 to detect the flow rate of the pipeline and the amount of side flow water entering. The tap water source 14 is connected to the circulation tank 18 through a pipeline to clean and maintain the entire equipment and to add water to dilute the concentration of ozone water in order to obtain ozone water with different concentration levels.

[0028] The circulating tank 18 is equipped with a level gauge 17 on its side for detecting the water level inside the circulating tank 18; the top of the circulating tank 18 is equipped with an exhaust gas treatment device 15, which treats the harmful exhaust gas generated in the system to prevent the exhaust gas from escaping and causing harm to the human body and instruments; the top of the circulating tank 18 is equipped with an inspection port 23 for maintenance and testing; the bottom of the circulating tank 18 is equipped with a drain port 25 for discharging waste liquid.

[0029] The circulation tank 18 is connected to the circulation pump 11 through the circulation pipeline. If the concentration of ozone water in the circulation tank 18 is low, the water in the circulation tank 18 will be circulated a second time under the action of the circulation pump 11, repeating the mixing process, thereby increasing the concentration of ozone water.

[0030] The circulating tank 18 is connected to the finished water storage tank 19 via a pipeline. A second three-way valve 20 is installed on the pipeline between the circulating tank 18 and the finished water storage tank 19. The first end of the second three-way valve 20 is connected to the circulating tank 18, and the second end of the second three-way valve 20 is connected to the finished water storage tank 19. If the water in the circulating tank 18 meets the requirements for grain sterilization, the water in the circulating tank 18 is passed into the finished water storage tank 19 for storage.

[0031] The third end of the second three-way valve 20 is connected to the inlet of the ozone detection tank 2, and the outlet of the ozone detection tank 2 is connected to the finished water storage tank 19. The ozone detection tank 2 is equipped with an ozone analyzer 3, and the side wall of the ozone detection tank 2 is equipped with a sampling port 1. The concentration of the mixed ozone water is detected in the ozone detection tank 2. The sampling port 1 and the ozone analyzer 3 work together to detect the ozone, aiming to improve the detection accuracy.

[0032] The method of using the ozone side-flow dosing system for preparing high-concentration ozone water of this utility model is as follows: The circulation pump 11 is turned on to introduce 15%-25% of the total water volume from the tap water source 14 as side-flow water into the ejector 9, and simultaneously the ozone generator 13 is turned on to introduce ozone into the ejector 9; the first three-way valve 10 is adjusted to introduce the remaining water into the static mixer 4; the ozone-water mixture formed in the ejector 9 is simultaneously introduced into the static mixer 4 to fully mix with the remaining water; the mixed water is introduced from the static mixer 4 into the circulation tank 18, where it continues to dissolve and mix with ozone; if the ozone water concentration is low, the water is introduced into the circulation pump 11 for secondary mixing to increase the ozone water concentration; if the ozone water concentration meets the usage standards, the water is introduced into the finished water storage tank 19 for storage; the exhaust gas generated during the entire preparation process is treated by the exhaust gas treatment device 15 installed on the top of the circulation tank 18.

Claims

1. An ozone side-stream dosing system for preparing high-concentration ozone water, characterized in that: The system includes a tap water source (14), an ozone generator (13), an ejector (9), a static mixer (4), and a circulation tank (18). The outlet of the tap water source (14) is connected to the circulation pump (11) and the first end of the first three-way valve (10) in sequence through a pipeline. The second end of the first three-way valve (10) is connected to the inlet of the ejector (9). The outlet of the ozone generator (13) is connected to the inlet of the ejector (9). The third end of the first three-way valve (10) and the outlet of the ejector (9) are connected together to the inlet of the static mixer (4). The outlet of the static mixer (4) is connected to the circulation tank (18).

2. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: A one-way valve (12) is provided on the connecting pipe between the ozone generator (13) and the jet generator (9) to prevent backflow of gas and liquid.

3. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: Pressure sensors (8), pressure gauges (7), and manual ball valves (21) are installed on the pipelines between the tap water source (14) and the circulating pump (11), the pipelines between the circulating pump (11) and the ejector (9), and the pipelines between the ejector (9) and the static mixer (4).

4. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: A pipe sight glass (5) is installed on the pipeline between the static mixer (4) and the circulation tank (18) for observing the fluid flow pattern inside the pipeline.

5. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: A gas-liquid separator (6) is installed on the pipeline between the jet injector (9) and the static mixer (4). The outlet of the gas-liquid separator (6) is connected to the static mixer (4). The gas outlet of the gas-liquid separator (6) is connected to the circulation tank (18) through a gas pipe. A pressure regulating valve (22) is installed on the gas pipe at the outlet of the gas-liquid separator (6). A pressure regulating valve (22), a pressure sensor (8), and a pressure gauge (7) are installed on the pipeline at the outlet of the gas-liquid separator (6).

6. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: The circulating tank (18) is equipped with a level gauge (17) on the side, a tail gas treatment device (15), an inspection port (23) and a temperature sensor (24) on the top of the circulating tank (18), a drain port (25) at the bottom of the circulating tank (18), and a manual ball valve (21) on both the feed pipe and the discharge pipe of the circulating tank (18).

7. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: The circulation tank (18) is connected to the circulation pump (11) through the circulation pipeline.

8. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: A flow meter (16) is installed on the pipe at the outlet of the tap water source (14), and the tap water source (14) is connected to the circulation tank (18) through a pipe.

9. The ozone side-stream dosing system for preparing high-concentration ozone water according to claim 1, characterized in that: The circulating tank (18) is connected to the finished water storage tank (19) through a pipeline. A second three-way valve (20) is provided on the pipeline between the circulating tank (18) and the finished water storage tank (19). The first end of the second three-way valve (20) is connected to the circulating tank (18), the second end of the second three-way valve (20) is connected to the finished water storage tank (19), and the third end of the second three-way valve (20) is connected to the inlet of the ozone detection tank (2). The outlet of the ozone detection tank (2) is connected to the finished water storage tank (19). An ozone analysis instrument (3) is provided inside the ozone detection tank (2), and a sampling port (1) is provided on the side wall of the ozone detection tank (2).

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