Jet flow type oxygen-enriched aeration and dosing integrated device

Abstract

The present application relates to a kind of jet flow type oxygen-enriched aeration dosing integrated device, including box, jet flow aeration device and control system are installed in box, jet flow aeration device connects oxygen-enriched device and dosing tank, control system is electrically connected with oxygen-enriched device, dosing tank, jet flow aeration device.The present application has the advantages that the present application greatly improves solid-liquid-oxygen three-phase interface concentration and oxygen mass transfer efficiency, mixed uniformity, control precision is high, adaptability is strong, energy consumption is low, can be applied to activated sludge process sewage treatment process and river, pond and other natural water purification, with good economic and environmental benefits.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a jet-type integrated oxygen-enriched aeration and chemical dosing device, which is particularly suitable for high-efficiency aeration and chemical dosing in activated sludge wastewater treatment processes. It can also be applied to in-situ wastewater purification in natural water bodies such as rivers and ponds, and belongs to the field of water treatment equipment and process technology. Background Technology

[0002] In water treatment processes, the content of reactive oxygen species (ROS) has always been a key research focus. High ROS levels are crucial for the efficient degradation of pollutants in water. In the water treatment field, jet aeration has become the mainstream technology for increasing ROS concentration. By thoroughly mixing air and water, it slows down oxygen escape from the water, thereby increasing the concentration of ROS.

[0003] For example, Chinese patents (CN212151849U, CN214734850U, etc.) disclose a jet aeration device for sewage treatment, which can appropriately increase the concentration of active oxygen in water. However, the contact between the aerobic agent and the active oxygen is still limited. Increasing the concentration of active oxygen in direct contact with the agent is the key to improving the biological oxidation capacity.

[0004] For example, Chinese patents (CN216440551U, CN200910115021.7, etc.) disclose the thorough mixing of solid reagents and activated sludge with wastewater and air, which reduces the hassle of manual dosing, improves dosing efficiency, and increases the concentration of active oxygen in direct contact with the reagents, thereby further improving water treatment efficiency. Existing technologies can achieve thorough mixing of reagents, wastewater, and air to form a three-phase reaction interface. The mass transfer efficiency of active oxygen in water and the contact concentration at the solid-liquid-oxygen three-phase interface are the core factors determining the degradation efficiency of pollutants. Jet aeration technology, due to its advantages of high aeration efficiency, low energy consumption, and compact equipment, has become the mainstream technology for increasing the concentration of active oxygen in water. It draws in and mixes air through high-speed water flow, forming a gas-liquid mixture that is released, slowing down oxygen escape and increasing oxygen dissolution.

[0005] To further improve wastewater treatment efficiency, existing technologies integrate jet aeration with chemical dosing, achieving three-phase mixing of chemicals, wastewater, and air, forming a solid-liquid-gas three-phase reaction interface. This reduces the complexity of manual chemical dosing and, to some extent, improves the contact efficiency between chemicals and active oxygen. However, such integrated devices still have many technical shortcomings: 1. Using air as the aeration source, the oxygen content in the air is only 21%, while the nitrogen content is over 78%. This results in most interfaces in the solid-liquid-gas three-phase interface being unable to perform biological oxidation. The concentration of the solid-liquid-oxygen three-phase interface is extremely low, limiting the oxygen mass transfer efficiency and making it difficult to further improve the wastewater treatment effect.

[0006] 2. Aeration and chemical dosing are mixed simultaneously. Insufficient mixing of oxygen, chemicals and wastewater can easily lead to problems such as excessively high local concentrations of chemicals or uneven oxygen distribution, affecting the stability of the treatment effect.

[0007] 3. The control precision of the device is low, and the operating parameters of each system cannot be accurately and dynamically adjusted, making it difficult to adapt to the treatment needs of wastewater with different water quality and concentration.

[0008] 4. The lack of a sound emergency protection mechanism means that the equipment cannot be shut down in time when a malfunction occurs during operation, which can easily lead to equipment damage or a significant decrease in treatment effectiveness.

[0009] To address the aforementioned technical problems, developing a jet-type integrated aeration and dosing device that can improve the concentration at the solid-liquid-gas three-phase interface, achieve stepwise and thorough mixing of oxygen, reagents, and wastewater, and provide precise control and strong adaptability has become an urgent technical challenge to be solved in this field. Summary of the Invention

[0010] To address the aforementioned technical problems, namely the low concentration at the solid-liquid-oxygen three-phase interface, insufficient mixing, low control precision, and poor adaptability of jet-type aeration dosing devices, this invention provides an integrated jet-type oxygen-enriched aeration dosing device.

[0011] To achieve the above objectives, the present invention provides the following technical solution: A jet-type oxygen-enriched aeration and dosing integrated device, characterized in that: it includes a box, a jet aeration device is installed inside the box, and the jet aeration device is connected to an oxygen-enriched device and a dosing tank. The oxygen output end of the oxygen enrichment device and the chemical output end of the dosing tank are both connected to the jet aeration device. The high-concentration oxygen output from the oxygen enrichment device and the chemical output from the dosing tank can be fully mixed with the water to be treated in the jet aeration device and released as microbubbles through pressurized jet. The control system is also connected to the housing. The control system is electrically connected to the oxygen enrichment device, the dosing tank, and the jet aeration device. It can accurately control and display the start-up and shutdown status and operating parameters of each system in real time. It is also equipped with an emergency control unit to ensure the safety of the device.

[0012] Based on the above solutions, the following technical solutions can also be adopted: The oxygen enrichment device includes an oxygen generator, with an air inlet at the upper end of the oxygen generator to provide an air intake channel for the oxygen generator. An oxygen outlet pipe and an exhaust gas outlet are provided at the bottom of the upper end of the oxygen generator. The oxygen outlet pipe is connected to the oxygen mixing end of the jet aeration device for transporting high-concentration oxygen. The exhaust gas outlet is used to discharge nitrogen and other waste gases generated during the oxygen production process.

[0013] A pressure relief valve, an electromagnetic pneumatic valve, and a gas check valve are sequentially installed along the oxygen delivery direction on the oxygen outlet pipe. The opening pressure of the pressure relief valve can be preset by the control system. The pressure relief valve can automatically open to release pressure according to the preset pressure threshold and automatically close after the pressure is restored, ensuring stable operating pressure of the oxygen enrichment device. The electromagnetic pneumatic valve can adjust the valve opening according to the instructions of the control system to control the oxygen flow rate, achieving precise stepless control of the oxygen flow rate. The gas check valve can prevent fluid in the jet aeration device from flowing back into the oxygen enrichment device, avoiding damage to the oxygen generator due to water ingress and ensuring stable operation of the oxygen enrichment device.

[0014] The dosing tank includes a tank body with a stirring assembly inside. A dosing inlet is located on the upper side of the tank, which can add one or more of solid, liquid, and colloidal agents according to treatment needs, adapting to the agent requirements of different water qualities. A agent outlet pipe and a waste liquid outlet are located on the lower side of the tank, and the agent outlet pipe is connected to the agent mixing end of the jet aeration device for conveying uniformly mixed agents. The waste liquid outlet is used to discharge wastewater after cleaning the dosing tank.

[0015] The mixing assembly includes a stirring motor mounted on the housing, which drives a stirring shaft. A stirring paddle is connected to the stirring shaft to achieve uniform mixing of the medicine. The stirring motor is fixedly mounted on the top of the dosing tank via a bracket and is connected to the stirring shaft via a coupling. The stirring paddle is fixedly located at the end of the stirring shaft that extends into the dosing tank. The stirring motor is electrically connected to the stirring speed setting unit of the control system, which allows for uniform mixing of the medicine by adjusting the rotation speed, ensuring the stability of the medicine's effect.

[0016] A solenoid valve and a liquid check valve are installed sequentially on the agent outlet pipe along the agent delivery direction. The solenoid valve is electrically connected to the dosing speed setting unit of the control system and can adjust the valve opening according to the control system command to achieve precise stepless control of the dosing speed. The liquid check valve can prevent the fluid in the jet aeration device from flowing back into the dosing tank, avoiding agent contamination and failure.

[0017] The jet aeration device includes a segmented jet aeration pipe, with a water pump connected to one side of the segmented jet aeration pipe for receiving water to be treated. The water pump is electrically connected to the jet velocity setting unit of the control system, and can provide adjustable boosting power to the water to be treated by adjusting the output power.

[0018] The segmented jet aeration pipe consists of, in sequence along the water flow direction, a contraction section, a first throat, a first diffuser section, a flow stabilization section, a second contraction section, a second throat, a second diffuser section, and a microbubble release plate. The microbubble release plate is connected to the outlet pipe, and the treated water is discharged through the outlet pipe.

[0019] The first throat is the oxygen mixing end, which is connected to the oxygen outlet pipe of the oxygen enrichment device, and the second throat is the drug mixing end, which is connected to the drug outlet pipe of the dosing tank.

[0020] Both the first and second contraction sections are conical contraction structures, which can pressurize and accelerate the water flow, creating negative pressure at the corresponding throat, thus achieving self-priming mixing of oxygen and chemicals without the need for additional transport power, thereby reducing the overall energy consumption of the device.

[0021] The microbubble release disk has several micron-sized through holes with a diameter of 10-100 μm, which can disperse the mixed oxygen-liquid-solid three-phase fluid into microbubbles for release, greatly increasing the gas-liquid-solid contact area and contact time, and significantly improving oxygen mass transfer efficiency and reagent reaction efficiency.

[0022] The control system includes a power control module, an oxygen enrichment control module, a jet control module, a parameter adjustment module, and an emergency control module. Each module is integrated on the external operation panel of the device, making it easy to operate.

[0023] The power control module is equipped with a power start / stop button and a display to realize the overall power on / off control of the device. The display shows the power operating status and basic parameters such as current and voltage in real time.

[0024] The oxygen enrichment control module is equipped with an oxygen enrichment device start / stop button and a display, which enables independent start / stop of the oxygen enrichment device. The display shows the operating status and oxygen concentration of the oxygen enrichment device in real time.

[0025] The jet control module is equipped with a jet system start / stop button and a display, which enables the independent start / stop of the jet aeration device. The display shows the operating status and water pressure of the jet aeration device in real time.

[0026] The parameter adjustment module includes setting and display units for blower speed, discharge pressure, oxygen flow rate, jet speed, stirring speed, and dosing speed. It can precisely control the oxygen production, discharge pressure, and oxygen flow rate of the oxygen enrichment device, the stirring speed and dosing speed of the dosing tank, and the jet speed of the jet aeration device. The display unit can display the current values ​​of each parameter in real time, which is convenient for operators to monitor and adjust in real time.

[0027] The emergency control module includes a waste liquid outlet button, an exhaust gas outlet button, and an emergency stop button, which respectively enable the discharge of cleaning waste liquid, the discharge of oxygen-generating exhaust gas, and an emergency halt of all device functions. The waste liquid outlet button is linked to the waste liquid outlet of the dosing tank, enabling convenient and controllable discharge of cleaning waste liquid; the exhaust gas outlet button is linked to the exhaust gas outlet of the oxygen enrichment device, enabling controllable discharge of oxygen-generating exhaust gas; the emergency stop button is the main emergency switch for the device, which, when pressed, immediately halts all device functions, preventing the malfunction from escalating and improving the safety of device operation.

[0028] The oxygen generator in the oxygen enrichment device is a molecular sieve oxygen generator or a membrane separation oxygen generator. The oxygen concentration produced is greater than 80%, which is much higher than the oxygen concentration in the air. It can significantly increase the oxygen solubility in water and the concentration at the solid-liquid-oxygen three-phase interface, and significantly enhance the biological oxidation performance.

[0029] This invention also discloses an operation method for the above-mentioned jet-type oxygen-enriched aeration and dosing integrated device, comprising the following steps: S1. Start-up preparation: Based on the water quality indicators and treatment requirements of the water to be treated, such as COD, BOD, and ammonia nitrogen concentration, add appropriate reagents into the dosing tank through the inlet. Through the parameter adjustment module of the control system, preset the core operating parameters such as blower speed, discharge pressure, oxygen flow rate, jet speed, stirring speed, and dosing speed to ensure that the initial operating state of the device matches the treatment requirements.

[0030] S2. System Start-up: Turn on the main power of the device through the power start / stop button of the power control module and the display. After the power parameters stabilize, start the oxygen enrichment device and the jet aeration device in sequence through the oxygen enrichment control module and the jet control module. At the same time, the stirring component of the dosing tank will start automatically, and each system will enter the preset operating state.

[0031] S3. Aeration and Chemical Dosing: The oxygen generator of the oxygen-enriching device introduces air through the air inlet to prepare high-concentration oxygen (greater than 80%). The oxygen is then transported through the oxygen outlet pipe to the first throat of the jet aeration device. The water to be treated enters the jet aeration device through the inlet pipe. After being pressurized by the water pump, it is accelerated through the conical contraction section, creating a negative pressure at the first throat. This allows the high-concentration oxygen to be drawn in and fully mixed with the water to form an air-water mixture. After the air-water mixture is decelerated in the first diffusion section and stabilized in the flow stabilization section, it is pressurized and accelerated again through the second contraction section, creating a negative pressure at the second throat. This allows the uniformly mixed chemical agent delivered by the dosing tank to be drawn in and fully mixed with the air-water mixture, forming an oxygen-liquid-solid three-phase fluid. After the three-phase fluid is depressurized in the second diffusion section, it is dispersed into microbubbles with a diameter of 10-100μm through the micron-sized holes on the microbubble release plate and finally discharged through the outlet pipe, completing the aeration and chemical dosing treatment.

[0032] S4. Real-time control: During the operation of the device, the operator can monitor operating parameters such as blower speed, oxygen flow rate, jet speed, and dosing rate in real time through the various display units of the control system. At the same time, based on the real-time treatment effect of the water to be treated, such as effluent COD and dissolved oxygen concentration, the operator can dynamically adjust the operating parameters through the parameter adjustment module to achieve precise control and ensure the stability of wastewater treatment efficiency.

[0033] S5. Shutdown and Maintenance: After the wastewater treatment task is completed, the operator shall sequentially shut down the jet aeration device and the oxygen enrichment device through the jet control module and the oxygen enrichment control module. The stirring components shall stop simultaneously. Finally, the main power shall be turned off. If the dosing tank needs to be cleaned, cleaning water shall be injected into the dosing tank, and the stirring components shall be started for thorough cleaning. After cleaning is completed, the waste liquid outlet shall be opened through the waste liquid outlet button to discharge the cleaning waste liquid and complete the device maintenance.

[0034] S6. Emergency Handling: If equipment failure, abnormal parameters, or other emergencies occur during the operation of the device, the operator shall immediately press the emergency stop button to immediately suspend all functions of the device. After the fault is eliminated and the parameters return to normal, the device shall be restarted and operation resumed.

[0035] The beneficial effects of this invention are: 1. This invention provides high-concentration oxygen by setting up an independent oxygen-enriching device, replacing traditional air aeration and significantly increasing the concentration at the solid-liquid-oxygen three-phase interface. A segmented jet aeration pipe is used to achieve stepwise self-absorption mixing of oxygen and water, and of reagents and air-water mixtures, improving mixing uniformity. An integrated precision control system is set up to achieve stepless adjustment and real-time display of the operating parameters of each system. Simultaneously, a comprehensive emergency control module is equipped to enhance the safety and stability of the device's operation, ultimately achieving a significant improvement in wastewater treatment efficiency and adapting to the treatment needs of water bodies with different qualities and concentrations.

[0036] 2. This invention prepares high-concentration oxygen (not less than 80%) by setting up an independent oxygen-enriching device, replacing traditional air aeration. This completely solves the technical problem of low concentration at the solid-liquid-oxygen three-phase interface caused by low oxygen content in existing devices. It enables oxygen, reagents, and wastewater to form a highly efficient solid-liquid-oxygen three-phase mixture, significantly improving the contact concentration and oxygen mass transfer efficiency at the solid-liquid-oxygen three-phase interface, and significantly enhancing biological oxidation performance. The wastewater treatment efficiency is increased by more than 50% compared to traditional devices. It can treat both low-concentration domestic sewage and high-concentration industrial wastewater.

[0037] 3. This invention employs a segmented jet aeration pipe design to achieve stepwise self-priming mixing of oxygen and water, and of reagents and air-water mixtures. The converging section has a conical converging structure, which can create negative pressure at the throat, eliminating the need for additional conveying power and reducing the overall energy consumption of the device. Simultaneously, the microbubble release plate disperses the three-phase fluid into microbubbles of 10-100 μm, significantly extending the residence time of oxygen in the water and increasing the contact area and contact time between oxygen, reagents, and wastewater. This solves the problem of insufficient mixing in existing devices and ensures the stability of the treatment effect.

[0038] 4. This invention features an integrated intelligent control system that enables independent start-up and shutdown of each system and stepless precise adjustment of core operating parameters. It is also equipped with a real-time display unit, allowing operators to monitor the device's operating status and parameters in real time and dynamically adjust them based on the treatment effect, thus solving the problem of low control precision in existing devices. Furthermore, the control system is adaptable to different combinations of operating parameters, meeting the diverse treatment needs of various wastewater treatment processes such as SBR, AO, and AAO, as well as natural water bodies like rivers and ponds. This significantly improves the adaptability and versatility of the device.

[0039] 5. This invention is equipped with a one-way valve and a pressure relief valve on the oxygen outlet pipe and the reagent outlet pipe, respectively, to effectively prevent fluid backflow and ensure the independent and stable operation of each system; at the same time, it is equipped with a complete emergency control module, which realizes the controllable discharge of waste liquid and waste gas and the emergency shutdown of the device, solves the problem of the lack of emergency protection mechanism in the existing device, improves the safety and reliability of the device operation, and reduces equipment maintenance costs.

[0040] 6. This invention integrates oxygen enrichment, automatic dosing, and jet aeration functions into one compact and rationally laid-out unit, reducing the space occupied by each functional module and connecting pipelines. This significantly reduces the difficulty of equipment installation and the floor space required. Furthermore, it features low energy consumption and high processing load during operation, resulting in both good economic and environmental benefits. At the same time, the device is easy to operate, requiring no professional operators, making it convenient for widespread application.

[0041] 7. The operation method of this invention has clear steps and rigorous logic, realizing the standardized and intelligent operation of the device. Through parameter preset for startup preparation, real-time control during operation, maintenance after shutdown, and emergency handling of unexpected situations, the processing efficiency and operational stability of the device are guaranteed, further improving the practicality of the device. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the basic structure of the present invention; Figure 2 This is a schematic diagram of the control panel of the present invention. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] like Figure 1 and Figure 2 As shown, the present invention relates to a jet-type oxygen-enriched aeration and dosing integrated device, including a housing 4, a jet aeration device 3 installed in the housing 4, and the jet aeration device 3 connected to an oxygen-enriched device 1 and a dosing tank 2.

[0046] The dosing tank 2 is fixedly installed on the left side of the oxygen enrichment device 1. The two are integrated welded structures, which improves the overall structural stability of the device.

[0047] The jet aeration device 3 is fixedly installed below the oxygen enrichment device 1 and the dosing tank 2, and is connected to both via flanges for easy disassembly and maintenance.

[0048] The oxygen output end of the oxygen enrichment device 1 and the reagent output end of the dosing tank 2 are both connected to the jet aeration device 3 through stainless steel pipelines. The oxygen enrichment device 1 outputs high-concentration oxygen with a concentration greater than 80%, which is 85% in this scheme. The uniformly mixed reagent output from the dosing tank 2 can be fully mixed with the water to be treated in the jet aeration device 3, and released as 10-100μm microbubbles through pressurized jet. This scheme uses 30μm.

[0049] The control system is electrically connected to the oxygen enrichment device 1, the dosing tank 2, and the jet aeration device 3 via cables. It can precisely steplessly control the start-up and shutdown status and operating parameters of each system and display the data in real time. It is also equipped with an emergency control unit to ensure the safety of the device.

[0050] The oxygen enrichment device 1 includes an oxygen generator 1.1, an air inlet 1.2, an oxygen outlet pipe 1.3, and an exhaust outlet 1.4. The oxygen generator 1.1 is a molecular sieve oxygen generator with built-in zeolite molecular sieve adsorbent, which can achieve efficient separation of nitrogen and oxygen and produce oxygen with a concentration of 85%-93%. This scheme adopts 90%.

[0051] The air inlet 1.2 is located at the upper end of the oxygen enrichment device 1 and has a built-in air filter cotton to filter the incoming air and prevent impurities from entering the oxygen generator 1.1.

[0052] The oxygen outlet pipe 1.3 and the waste gas outlet 1.4 are both located at the bottom of the oxygen enrichment device 1. The oxygen outlet pipe 1.3 is connected to the first throat pipe 3.4 of the jet aeration device 3. The waste gas outlet 1.4 is equipped with a manual valve that is linked to the waste gas outlet button 4.11 of the control system.

[0053] A pressure relief valve 1.5, an electromagnetic pneumatic valve 1.6, and a gas check valve 1.7 are sequentially fixed to the oxygen outlet pipe 1.3 along the oxygen delivery direction via flanges. The opening pressure of the pressure relief valve 1.5 can be preset within the range of 0.1-0.5 MPa by the control system; in this design, it is 0.3 MPa. It automatically opens to release pressure when the pressure in the oxygen outlet pipe 1.3 exceeds the preset threshold and automatically closes when the pressure returns to the threshold. The electromagnetic pneumatic valve 1.6 is an electrically adjustable valve with an adjustment accuracy of 0.01 m³ / h. It can precisely adjust the valve opening according to the instructions of the control system, achieving stepless control of the oxygen flow rate. The gas check valve 1.7 is a swing check valve with an opening pressure of 0.02 MPa, effectively preventing water and chemicals in the jet aeration device 3 from flowing back into the oxygen enrichment device 1.

[0054] The dosing tank 2 is a sealed tank made of stainless steel, including a dosing inlet 2.1, a stirring assembly, a reagent outlet pipe 2.5, and a waste liquid outlet 2.6. The dosing inlet 2.1 is located at the top of the dosing tank 2 and is equipped with a sealing cap. It can add one or more of solid reagents, such as PAC and PAM, liquid reagents, such as sodium hypochlorite, and colloidal reagents.

[0055] Both the reagent outlet pipe 2.5 and the waste liquid outlet 2.6 are located at the bottom of the dosing tank 2. The reagent outlet pipe 2.5 is connected to the second throat pipe 3.8 of the jet aeration device 3 via a flange. An electric valve is installed on the waste liquid outlet 2.6, which is linked to the waste liquid outlet button 4.10 of the control system.

[0056] The mixing assembly includes a mixing motor 2.2, a mixing shaft 2.3, and a mixing paddle 2.4. The mixing paddle 2.4 is a U-shaped rod, and the mixing shaft 2.3 is connected to the central axis of the mixing paddle 2.4. The mixing motor 2.2 is a variable frequency speed control motor, which is fixedly installed on the top of the dosing tank 2 by a bracket. Its output shaft is connected to the mixing shaft 2.3 by a coupling. The mixing shaft 2.3 is made of stainless steel, and its lower end extends vertically into the dosing tank 2. The mixing paddle 2.4 is a three-bladed propeller-type mixing paddle, which is fixedly sleeved on the lower end of the mixing shaft 2.3, enabling uniform mixing of the agent with a mixing uniformity of over 95%. A solenoid valve 2.7 and a liquid check valve 2.8 are fixedly installed on the agent outlet pipe 2.5 along the agent delivery direction via flanges. The solenoid valve 2.7 is a proportional regulating solenoid valve with an adjustment accuracy of 0.01 L / min, which can accurately adjust the dosing speed according to the instructions of the control system. The liquid check valve 2.8 is a lift-type check valve with an opening pressure of 0.01 MPa, which can effectively prevent water and oxygen in the jet aeration device 3 from flowing back into the dosing tank 2.

[0057] The jet aeration device 3 includes an inlet pipe 3.1, a water pump 3.2, a segmented jet aeration pipe, and a saddle support 3.12. The inlet pipe 3.1 is located at the right end of the jet aeration device 3 and has a built-in filter screen to filter large particulate impurities in the water to be treated. The water pump 3.2 is a variable frequency booster pump, with its inlet end connected to the flange of the inlet pipe 3.1 and its outlet end connected to the flange of the segmented jet aeration pipe. It can provide an adjustable pressure of 0.1-0.8 MPa to the water to be treated by adjusting the output power. The saddle support 3.12 is made of carbon steel with anti-corrosion treatment and is fixedly installed below the jet aeration device 3. It is fixed to the ground with expansion bolts to achieve stable fixation of the jet aeration device 3.

[0058] The segmented jet aeration pipe is made of stainless steel and consists of, in sequence along the water flow direction, a contraction section 3.3, a first throat 3.4, a first diffuser section 3.5, a flow stabilization section 3.6, a second contraction section 3.7, a second throat 3.8, a second diffuser section 3.9, and a microbubble release plate 3.10. Each segment is connected by flanges for easy disassembly and cleaning. The output end of the microbubble release plate 3.10 is fixedly connected to the outlet pipe 3.11 via a flange, and the treated water is discharged through the outlet pipe 3.11. The first throat 3.4 is the oxygen mixing end, connected to the oxygen outlet pipe 1.3 of the oxygen enrichment device 1, and the second throat 3.8 is the reagent mixing end, connected to the reagent outlet pipe 2.5 of the dosing tank 2. Both contraction sections 3.3 and 3.7 are conical contraction structures with a contraction ratio of 3:1, which can efficiently pressurize and accelerate the water flow, creating a negative pressure of -0.02 to -0.05 MPa at the corresponding throat, thus achieving self-priming mixing of oxygen and chemicals. The microbubble release plate 3.10 is made of ceramic and has several micron-sized through holes with a diameter of 50 μm, which can disperse the mixed oxygen-liquid-solid three-phase fluid into microbubbles for release, increasing the gas-liquid-solid contact area.

[0059] The control system is a PLC-integrated intelligent control system, including a power control module, an oxygen enrichment control module, a jet control module, a parameter adjustment module, and an emergency control module. Each module is integrated into the external operation panel of the device, which is equipped with both a touchscreen and physical buttons, offering dual operation modes for high convenience. The power control module has a power start / stop button and a display 4.1, enabling overall power on / off control of the device. The display shows the voltage and current parameters of the power supply in real time. The oxygen enrichment control module has an oxygen enrichment device start / stop button and a display 4.2, enabling independent start / stop of oxygen enrichment device 1. The display shows the operating status and oxygen concentration of the oxygen enrichment device in real time. The jet control module has a jet system start / stop button and a display 4.3, enabling independent start / stop of jet aeration device 3. The display shows the operating status and water pressure of the jet aeration device in real time. All of the above modules are existing technology, purchased components, and control modules that implement the above functions.

[0060] The parameter adjustment module includes setting and display units for blower speed, discharge pressure, oxygen flow rate, jet velocity, stirring speed, and dosing speed. Each setting unit uses a combination of touchscreen stepless adjustment and physical button adjustment, offering a wide adjustment range and high precision. The display unit is an LCD screen that can display the current values ​​of each parameter in real time. The emergency control module includes a waste liquid outlet button 4.10, a waste gas outlet button 4.11, and an emergency stop button 4.12. The emergency stop button 4.12 is a red mushroom-shaped button with a self-locking function. Pressing it immediately pauses all functions of the device, and rotating it resets the button, improving the safety of the device operation.

[0061] In this embodiment, the operation method of the device includes the following steps: S1. Start-up preparation: The water to be treated is industrial organic wastewater with a COD concentration of 800 mg / L and a BOD concentration of 350 mg / L. According to the water quality indicators, PAC agent is added to the dosing tank 2 through the inlet 2.1. The PAC agent is polyaluminum chloride. Through the parameter adjustment module of the control system, the preset blower speed is 2 m³ / min, the discharge pressure is 0.3 MPa, the oxygen flow rate is 0.5 m³ / h, the jet speed is 2 m / s, the stirring speed is 300 r / min, and the dosing rate is 0.8 L / min.

[0062] S2. System Start-up: Turn on the main power supply of the device through the power start / stop button of the power control module and the display 4.1. After the voltage and current parameters stabilize, start the oxygen enrichment device 1 and the jet aeration device 3 in sequence through the oxygen enrichment control module and the jet control module. The stirring component of the dosing tank 2 starts synchronously. Each system enters the preset operating state. The oxygen concentration prepared by the oxygen enrichment device 1 is 90%.

[0063] S3. Aeration and Chemical Dosing: 90% oxygen concentration prepared by oxygen enrichment device 1 is delivered to the first throat 3.4 via oxygen outlet pipe 1.3. The water to be treated enters the jet aeration device 3 via inlet pipe 3.1, is pressurized to 0.5 MPa by pump 3.2, and then accelerated to 2 m / s through contraction section 3.3, creating a negative pressure of -0.03 MPa at the first throat 3.4, drawing in high-concentration oxygen and mixing it thoroughly with the water to form an air-water mixture. After being decelerated in the first diffusion section 3.5 and stabilized in the flow stabilization section 3.6, the air-water mixture is again pressurized and accelerated through the second contraction section 3.7, creating a negative pressure of -0.02 MPa at the second throat 3.8, drawing in PAC chemicals delivered by dosing tank 2 and mixing them thoroughly with the air-water mixture to form an oxygen-liquid-solid three-phase fluid. After the three-phase fluid is depressurized in the second diffusion section 3.9, it is dispersed into microbubbles through the 50μm through-hole on the microbubble release plate 3.10 and finally discharged through the water outlet pipe 3.11.

[0064] S4. Real-time control: During the operation of the device, the operator monitors various operating parameters in real time through the display unit of the control system. The dissolved oxygen concentration in the effluent is detected to be 8 mg / L. Based on the treatment effect, the oxygen flow rate is finely adjusted to 0.55 m³ / h and the dosing rate is finely adjusted to 0.75 L / min to ensure the wastewater treatment efficiency.

[0065] S5. Shutdown and Maintenance: After the sewage treatment task is completed, turn off the jet aeration device 3, oxygen enrichment device 1 and main power supply in sequence, and the stirring components will stop synchronously; inject clean water into the dosing tank 2, start the stirring components to clean at a speed of 300r / min for 5 minutes, and after cleaning, open the waste liquid outlet 2.6 through the waste liquid outlet button 4.10 to discharge the cleaning waste liquid.

[0066] S6. Emergency Handling: If the water pressure suddenly increases due to blockage in the inlet pipe during operation, the operator should immediately press the emergency stop button 4.12. All functions of the device will be suspended immediately. After cleaning the impurities from the filter screen of the inlet pipe, rotate the reset emergency stop button to restart the device and restore normal operation.

[0067] Testing showed that the device in this embodiment achieved a COD removal rate of over 85% and a BOD removal rate of over 90% for the aforementioned industrial organic wastewater. The treatment efficiency was 60% higher than that of traditional jet aeration dosing devices, and the energy consumption during operation was reduced by 30%, demonstrating both excellent treatment effect and energy-saving benefits.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A jet-type integrated oxygen-enriched aeration and dosing device, characterized in that: Includes a box (4), and a jet aeration device (3) is installed inside the box (4). The jet aeration device (3) is connected to the oxygen enrichment device (1) and the dosing tank (2). The oxygen output end of the oxygen enrichment device (1) and the agent output end of the dosing tank (2) are both connected to the jet aeration device (3). The high-concentration oxygen output by the oxygen enrichment device (1) and the agent output by the dosing tank (2) can be fully mixed with the water to be treated in the jet aeration device (3) and released as microbubbles by pressurized jet. The control system is also connected to the housing (4). The control system is electrically connected to the oxygen enrichment device (1), the dosing tank (2), and the jet aeration device (3). It can accurately control and display the start-up and shutdown status and operating parameters of each system in real time, and is equipped with an emergency control unit to realize the safety protection of the device.

2. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 1, characterized in that: The oxygen enrichment device (1) includes an oxygen generator (1.1), with an air inlet (1.2) at the upper end of the oxygen generator (1.1), an oxygen outlet pipe (1.3) and an exhaust gas outlet (1.4) at the bottom of the upper end of the oxygen generator (1.1), and the oxygen outlet pipe (1.3) is connected to the oxygen mixing end of the jet aeration device (3); A pressure relief valve (1.5), an electromagnetic pneumatic valve (1.6), and a gas check valve (1.7) are installed sequentially along the oxygen delivery direction on the oxygen outlet pipe (1.3). The pressure relief valve (1.5) can automatically open to release pressure according to a preset pressure threshold. The electromagnetic pneumatic valve (1.6) can adjust the valve opening according to the instructions of the control system to control the oxygen flow rate. The gas check valve (1.7) can prevent the fluid in the jet aeration device (3) from flowing back into the oxygen enrichment device (1).

3. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 1, characterized in that, The dosing tank (2) includes a tank body, a stirring assembly is provided inside the tank body, a drug inlet (2.1) is provided on the upper side of the dosing tank (2), a drug outlet pipe (2.5) and a waste liquid outlet (2.6) are provided on the lower side of the dosing tank (2), and the drug outlet pipe (2.5) is connected to the drug mixing end of the jet aeration device (3); The stirring assembly includes a stirring motor (2.2) mounted on the housing (4), the stirring motor (2.2) drives a linked stirring shaft (2.3), and a stirring paddle (2.4) is connected to the stirring shaft (2.3) to achieve uniform mixing of the agent. A solenoid valve (2.7) and a liquid check valve (2.8) are installed sequentially on the agent outlet pipe (2.5) along the agent delivery direction. The solenoid valve (2.7) can adjust the dosing speed according to the instructions of the control system, and the liquid check valve (2.8) can prevent the fluid in the jet aeration device (3) from flowing back into the dosing tank (2).

4. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 1, characterized in that, The jet aeration device (3) includes a segmented jet aeration pipe, and a water pump (3.2) is connected to one side of the segmented jet aeration pipe. The segmented jet aeration pipe consists of, in sequence along the water flow direction, a contraction section (3.3), a first throat (3.4), a first diffusion section (3.5), a flow stabilization section (3.6), a second contraction section (3.7), a second throat (3.8), a second diffusion section (3.9), and a microbubble release plate (3.10). The microbubble release plate (3.10) is connected to the water outlet pipe (3.11). The first throat (3.4) is the oxygen mixing end, which is connected to the oxygen outlet pipe (1.3) of the oxygen enrichment device (1). The second throat (3.8) is the drug mixing end, which is connected to the drug outlet pipe (2.5) of the dosing tank (2).

5. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 4, characterized in that, Both the contraction section (3.3) and the second contraction section (3.7) are conical contraction structures, which can pressurize and accelerate the water flow, creating negative pressure at the corresponding throat, and realizing the self-priming inhalation and mixing of oxygen and medicine. The microbubble release plate (3.10) has several micron-sized through holes, which can disperse the mixed three-phase fluid into microbubbles for release, thereby increasing the gas-liquid-solid contact area.

6. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 1, characterized in that, The control system includes a power control module, an oxygen enrichment control module, a jet control module, a parameter adjustment module, and an emergency control module. The power control module is equipped with a power start / stop button and a display (4.1) to realize the overall power on / off control of the device; The oxygen enrichment control module is equipped with an oxygen enrichment device start / stop button and a display (4.2) to realize the independent start / stop of the oxygen enrichment device (1). The jet control module is equipped with a jet system start / stop button and a display (4.3) to realize the independent start / stop of the jet aeration device (3); The parameter adjustment module includes setting and display units for blower speed, discharge pressure, oxygen flow rate, jet speed, stirring speed, and dosing speed, which can steplessly adjust and display the core operating parameters of each system in real time. The emergency control module includes a waste liquid outlet button (4.10), a waste gas outlet button (4.11), and an emergency stop button (4.12), which respectively enable the discharge of cleaning waste liquid, the discharge of oxygen-generating waste gas, and the emergency suspension of all functions of the device.

7. The jet-type oxygen-enriched aeration and dosing integrated device according to any one of claims 1-6, characterized in that, The operation method of the device includes the following steps: S1. Start-up preparation: According to the water quality index and treatment requirements of the water to be treated, add appropriate reagents to the dosing tank (2) and preset the operating parameters such as blower speed, discharge pressure, oxygen flow rate, jet speed, stirring speed, and dosing speed through the control system. S2, System Start-up: Turn on the main power supply of the device through the power control module, and start the stirring components of the oxygen enrichment device (1), jet aeration device (3) and dosing tank (2) in sequence. Each system enters the preset operating state. S3, Aeration and Chemical Dosing: The high-concentration oxygen prepared by the oxygen enrichment device (1) is transported to the first throat (3.4) through the oxygen outlet pipe (1.3), and is self-absorbed and mixed with the water to be treated by the pressurization of the water pump (3.2) and the acceleration of the contraction section (3.3) to form an air-water mixture; after passing through the first diffusion section (3.5), the flow stabilization section (3.6), and the second contraction section (3.7), the air-water mixture is self-absorbed and mixed with the chemical agent transported by the dosing tank (2) in the second throat (3.8) to form an oxygen-liquid-solid three-phase fluid; after the three-phase fluid is depressurized by the second diffusion section (3.9), it is released through the microbubble release plate (3.10) to form microbubbles, and finally discharged through the water outlet pipe (3.11); S4. Real-time control: During the operation of the device, the display unit of the control system monitors various operating parameters. Based on the real-time treatment effect of the water to be treated, the operating parameters are dynamically adjusted through the parameter adjustment module to ensure treatment efficiency. S5. Shutdown and maintenance: After the treatment is completed, shut down the jet aeration device (3), oxygen enrichment device (1) and main power supply in sequence. If it is necessary to clean the dosing tank (2), inject cleaning water and start the stirring assembly. After cleaning, discharge the cleaning waste liquid through the waste liquid outlet button (4.10). S6. Emergency handling: If a fault or emergency occurs during the operation of the device, press the emergency stop button (4.12) to suspend all functions of the device. After the fault is cleared, restart the device to resume operation.

8. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 7, characterized in that, In step S3, the oxygen concentration prepared by the oxygen enrichment device (1) is greater than 80%, which is higher than the oxygen concentration in the air; the microbubble released by the microbubble release plate (3.10) has a diameter of 10-100μm, which can significantly prolong the residence time of oxygen in water and improve the oxygen mass transfer efficiency.

9. The jet-type oxygen-enriched aeration and dosing integrated device according to claim 1, characterized in that, The device can be applied to activated sludge wastewater treatment processes such as SBR, AO, and AAO, and can also be applied to in-situ purification of natural water bodies such as rivers, ponds, and landscape water bodies. It can adapt to different treatment needs of low-concentration domestic sewage, high-concentration industrial wastewater, and natural black and odorous water bodies.

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