Ultrasonic sewage treatment device

Abstract

The invention discloses an ultrasonic sewage treatment device, which belongs to the technical field of sewage treatment and comprises a water tank, a water inlet pipe is arranged on the upper portion of the side wall of the water tank, and a water outlet pipe is arranged on the lower portion of the side wall of the water tank; an ultrasonic cabin is arranged at the bottom of the water tank, the ultrasonic cabin comprises a double-layer structure shell, the double-layer structure shell comprises a radiation window located at the top, a plurality of ultrasonic transducers arranged in a matrix mode are arranged in the ultrasonic cabin, and a self-cleaning module is arranged on the inner side wall of the radiation window. According to the ultrasonic sewage treatment device, an independent ultrasonic cabin structure is adopted, the disassembly, assembly and maintenance of the transducer are simplified, the radiation window is kept clean through the self-cleaning module, the ultrasonic cavitation effect is stabilized, and the operation continuity and maintenance convenience of the device are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an ultrasonic wastewater treatment device. Background Technology

[0002] Ultrasonic wastewater treatment devices are advanced environmental protection equipment that utilizes the physicochemical principle of "cavitation effect" generated by ultrasound in liquids to efficiently treat various types of wastewater and sludge. It generates high-frequency sound waves in the liquid, forming countless tiny bubbles that burst violently and instantaneously, producing localized high temperatures and pressures, thereby decomposing pollutants. Its core lies in the cavitation effect and free radical oxidation. Simply put, when ultrasound propagates in wastewater, it generates a large number of tiny "cavitation bubbles." These bubbles vibrate violently under the influence of the sound field and eventually burst instantaneously, generating localized high temperatures of up to 5000°C and instantaneous high pressures exceeding 50 MPa. These extreme physical conditions can directly break the chemical bonds of pollutants, degrading toxic and harmful organic matter into carbon dioxide, water, or harmless small molecules. Simultaneously, the cavitation effect also generates free radicals with extremely strong oxidizing capabilities (such as hydroxyl radicals), further oxidizing and decomposing pollutants. Furthermore, the synergistic effects of mechanical and thermal effects also enhance the treatment effect.

[0003] Traditional ultrasonic wastewater treatment devices treat the transducer and reactor body as an integrated structure. The transducer is installed primarily in three ways: side-wall fixing, bottom flange fixing, and immersion installation. These methods are essentially rigid, non-removable connections. The transducer is fixed to the reactor body via welding or sealant bonding, meaning it is permanently attached and cannot be easily disassembled. In actual industrial applications, the transducer is constantly immersed in wastewater, making it susceptible to scaling and corrosion from impurities and corrosive substances. Furthermore, prolonged high-frequency operation can lead to performance degradation or damage. Because the transducer and reactor body are non-removable, when the transducer needs replacement due to scaling, corrosion, or damage, the wastewater in the reactor tank must be completely drained before disassembling the numerous pipes and accessories connected to the reactor body to allow for transducer removal and replacement. This maintenance process is not only cumbersome and time-consuming, leading to prolonged shutdowns of the wastewater treatment system and affecting treatment efficiency, but it also significantly increases equipment maintenance costs. Furthermore, the processes of emptying the tank and disassembling the pipelines pose certain operational risks, failing to meet the demands for efficient, convenient, and low-cost equipment maintenance in industrial production. Therefore, this invention proposes an ultrasonic wastewater treatment device. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasonic wastewater treatment device to solve the problems mentioned above.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses an ultrasonic wastewater treatment device, comprising a water tank, an inlet pipe disposed on the upper part of the side wall of the water tank, and an outlet pipe disposed on the lower part of the side wall; an ultrasonic chamber disposed at the bottom of the water tank, the ultrasonic chamber comprising a double-layered outer shell, the double-layered outer shell comprising a radiation window located at the top, a plurality of ultrasonic transducers arranged in a matrix disposed inside the ultrasonic chamber, and a self-cleaning module disposed on the inner side wall of the radiation window.

[0006] Furthermore, temperature control chambers are integrally formed on both sides of the bottom of the water tank, and temperature control components are installed inside the temperature control chambers.

[0007] Furthermore, the double-layer structure shell includes a protective shell, a polyurethane vibration-absorbing layer, and a stainless steel structural layer arranged sequentially from the outside to the inside.

[0008] Furthermore, the self-cleaning module includes a support ring, one end of which is connected to the bottom of the double-layered outer shell via several circumferentially distributed spring guide posts; a rotating ring is concentrically arranged inside the support ring, and the support ring is slidably connected to its outer side wall via several circumferentially distributed guide sliders; a central fulcrum is provided at the center of the rotating ring, and several scrapers are circumferentially distributed between the central fulcrum and the rotating ring, with the scrapers pressing against the radiation window under the elastic action of the spring guide posts.

[0009] Furthermore, a guide groove is provided on the inner sidewall of the support ring to cooperate with the guide slider.

[0010] Furthermore, the scraper includes a scraper seat, and a blade is disposed below the scraper seat. The scraper seat is designed with an obtuse angle.

[0011] Furthermore, both the central fulcrum and the rotating ring have slits for mounting the scraper seat.

[0012] Furthermore, the blade material is polyetheretherketone (PEEK) or tungsten carbide coated stainless steel.

[0013] Furthermore, the scraper is attached to the inner surface of the radiation window at an angle of 5° to 15°.

[0014] Furthermore, the edge of the radiation window is provided with an annular drainage trough and a radial groove for discharging scraped-off dirt.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention, an ultrasonic wastewater treatment device, integrates the ultrasonic transducer into a separate ultrasonic chamber, eliminating the traditional structure where the transducer and tank are fixed together. This effectively solves the cumbersome problem of needing to empty the tank and disassemble numerous pipelines to replace the transducer after scaling, corrosion, or damage. Simultaneously, a self-cleaning module is installed inside the radiation window to reduce dirt adhesion, maintain ultrasonic radiation efficiency, ensure stable cavitation effect, and improve the continuity of wastewater treatment and ease of equipment maintenance. The ultrasonic wastewater treatment device of this invention adopts an independent ultrasonic chamber structure, simplifying transducer disassembly and maintenance, and keeps the radiation window clean through the self-cleaning module, stabilizing the ultrasonic cavitation effect and significantly improving the continuity of device operation and ease of maintenance. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the ultrasonic wastewater treatment device of the present invention; Figure 2 This is a main sectional view of the ultrasonic wastewater treatment device of the present invention; Figure 3 This is a schematic diagram of an ultrasonic transducer. Figure 4 This is a cross-sectional view of the ultrasonic chamber; Figure 5 Top view of the self-cleaning module; Figure 6 This is a schematic diagram of the scraper structure.

[0018] Explanation of reference numerals in the attached diagram: 1. Water tank; 2. Temperature control component; 3. Temperature control chamber; 4. Ultrasonic chamber; 5. Ultrasonic transducer; 6. Self-cleaning module; 7. Water outlet pipe; 8. Water inlet pipe; 401. Protective shell; 402. Polyurethane vibration-absorbing layer; 403. Stainless steel structural layer; 404. Radiation window; 601, Support ring; 602, Spring guide post; 603, Rotating ring; 604, Guide slider; 605, Central fulcrum; 606, Scraper; 6061, Scraper seat; 6062, Blade. Detailed Implementation

[0019] like Figure 1-6As shown, an ultrasonic wastewater treatment device includes a water tank 1. An inlet pipe 8 is located on the upper part of the side wall of the water tank 1, and an outlet pipe 7 is located on the lower part of the side wall. Wastewater enters the water tank 1 through the inlet pipe 8, undergoes ultrasonic treatment, and then exits the water tank 1 through the outlet pipe 7 to proceed to the next process. An ultrasonic chamber 4 is installed at the bottom of the water tank 1. The ultrasonic chamber 4 includes a double-layered outer shell, with a radiation window 404 at the top. This prevents corrosive substances, particulate matter, and conductive media in the wastewater from directly eroding and contaminating the transducers, preventing short circuits in the transducer electrodes, corrosion of piezoelectric elements, and surface scaling, significantly improving the operational stability and service life of the ultrasonic transducers. Several ultrasonic transducers 5 are installed in a matrix arrangement inside the ultrasonic chamber 4, and a self-cleaning module 6 is installed on the inner side wall of the radiation window 404. This device features an ultrasonic chamber 4 at the bottom of the water tank 1. The ultrasonic chamber 4 has a double-layered outer shell and a radiation window 404 at the top. Ultrasonic transducers 5 are arranged in a matrix inside the chamber to ensure a uniform and stable ultrasonic cavitation effect. At the same time, a self-cleaning module 6 is installed inside the radiation window 404 to remove attached dirt in real time and maintain ultrasonic radiation efficiency. The independent ultrasonic chamber 4 structure separates the ultrasonic transducers 5 from the water tank 1 body, solving the problem of emptying the tank and disassembling the pipeline when replacing and maintaining the traditional integrated structure. This simplifies the disassembly and assembly process and improves the stability of equipment operation and the convenience of maintenance.

[0020] The aforementioned radiation window 404 is made of a material with excellent sound transmission performance and resistance to sewage corrosion (selected from one or more combinations of titanium alloy, 316L stainless steel, Hastelloy, alumina ceramic, zirconia ceramic, quartz glass, polytetrafluoroethylene or polymer composite materials). Its thickness is matched with the ultrasonic working frequency, which can reduce sound energy reflection loss and ensure that ultrasonic energy is efficiently radiated into the sewage. This allows the overall structure to achieve the expected ultrasonic treatment effect while providing isolation and protection.

[0021] Temperature control chambers 3 are integrally formed on both sides of the bottom of the water tank 1. Temperature control components 2 are installed inside the temperature control chambers 3 to stabilize the wastewater temperature within the water tank 1, ensuring the effectiveness of ultrasonic cavitation treatment, ensuring uniform wastewater temperature distribution, avoiding localized temperature differences that could affect treatment consistency, protecting device components, adapting to the optimal treatment temperature for different types of wastewater, and improving structural sealing and integration by integrating the temperature control chambers 3 with the water tank 1, facilitating installation and maintenance. Specifically, a target temperature is first set, and wastewater is injected into the water tank 1, covering the area of ​​the temperature control chambers 3. The temperature control components 2 are powered on, and based on the deviation between the water temperature and the set value, they heat or cool the wastewater in the water tank 1 through the temperature control chambers 3. Once the water temperature reaches the set range, the temperature control components 2 maintain a constant temperature and simultaneously activate the ultrasonic system to treat the wastewater. During treatment, the temperature control components 2 continuously and dynamically adjust until the wastewater is completely treated and discharged from the water tank 1.

[0022] The double-layered outer shell includes a protective shell 401, a polyurethane vibration-absorbing layer 402, and a stainless steel structural layer 403, installed sequentially from the outside in. The protective shell 401 provides external protection, the polyurethane vibration-absorbing layer 402 absorbs vibrations and reduces energy loss and noise, and the stainless steel structural layer 403 ensures structural strength and is compatible with ultrasonic radiation. The three elements work together to achieve vibration reduction and noise reduction, efficient energy utilization, and structural stability and reliability.

[0023] The self-cleaning module 6 includes a support ring 601. One end of the support ring 601, away from the radiation window 404, is connected to the bottom of the double-layered outer shell via several circumferentially distributed spring guide posts 602. A rotating ring 603 is concentrically mounted inside the support ring 601. The outer wall of the rotating ring 603 is slidably connected to the support ring 601 via several circumferentially distributed guide sliders 604. A guide groove is formed on the inner wall of the support ring 601 to cooperate with the guide sliders 604. A central fulcrum 605 is installed at the center of the rotating ring 603. Several scrapers 606 are circumferentially distributed between the central fulcrum 605 and the rotating ring 603. The scrapers 606 abut against the radiation window 404 under the elastic action of the spring guide posts 602. Each scraper 606 includes a scraper seat 6061, with a blade 6062 mounted below the scraper seat 6061. The scraper seat 6061 has an obtuse angle design. The scraper 606 is attached to the inner surface of the radiation window 404 at an angle of 5° to 15°.

[0024] Specifically, the self-cleaning module 6 uses a support ring 601 and circumferentially distributed spring guide posts 602 to elastically push against the radiant window 404, ensuring that the scraper 606 on the rotating ring 603 always presses against the radiant window 404. When the spring guide posts 602 drive the scraper 606 to press against the window, the inclined blades 6062 generate a centripetal tangential force, causing the blade to slide at the micrometer level on the window surface (i.e., the torsional component of the ultrasonic transducer 5 vibration drives the scraper 606 to rotate slowly, 0.1 to 1 revolution per minute, so that the blades 6062 move in a spiral trajectory). The scraper covers the entire inner surface of the window. It works in conjunction with the rotating ring 603, which rotates circumferentially through the guide slider 604 and the guide groove of the support ring 601 to complete the removal of dirt. The scraper 606 adopts a combination of obtuse angle scraper seat 6061 and blade 6062, and is in contact with the radiation window 404 at an angle of 5° to 15°. This not only enhances the sliding scraping effect but also avoids scratching the window. The central fulcrum 605 ensures smooth rotation, thereby continuously and automatically cleaning the radiation window, maintaining the ultrasonic transmittance and processing efficiency. The structure is stable and not easy to get stuck.

[0025] Both the central fulcrum 605 and the rotating ring 603 have cutouts for installing the scraper seat 6061, which can position and limit the scraper 606, ensuring that the 5° to 15° tilt angle between the scraper 606 and the radiation window 404 remains stable. At the same time, it improves the assembly accuracy and structural rigidity during rotation, avoids scraper slippage or wobble, and ensures uniform and reliable scraping effect.

[0026] The blade 6062 is made of polyetheretherketone (PEEK) or tungsten carbide coated stainless steel, balancing cleaning performance with protection of the 404 radiation window: PEEK is wear-resistant, corrosion-resistant, and has a moderate texture, while tungsten carbide coated stainless steel has high hardness and strong wear resistance. Both can efficiently scrape away dirt from the window while avoiding scratching the 404 radiation window, ensuring ultrasonic transmission efficiency, adapting to corrosive working conditions in sewage environments, and extending the blade's service life.

[0027] The edge of the radiation window 404 is provided with an annular drain groove and a radial groove for discharging scraped dirt. This allows the dirt scraped off by the scraper 606 to be guided out in a timely manner, preventing dirt from redepositing on the window surface or accumulating and jamming the cleaning mechanism. This ensures the cleanliness of the ultrasonic radiation surface and avoids dirt accumulation from affecting the cavitation effect and wastewater treatment efficiency.

[0028] In addition, in this embodiment, the ultrasonic chamber 4 is filled with thermally conductive silicone oil (kinematic viscosity 50-100 cSt, 25°C). This serves two purposes: firstly, as an ultrasonic coupling medium to improve sound energy transmission efficiency; and secondly, as a cooling medium. During operation, the ultrasonic transducer 5 generates a large amount of heat, which the thermally conductive silicone oil can promptly conduct to the protective shell 401 or radiation window 404 of the ultrasonic chamber 4 to dissipate, preventing the transducer from experiencing a decline in piezoelectric performance, accelerated aging, or even failure due to excessive temperature rise, thus improving the long-term stability and reliability of the device. A pressure balancing membrane made of silicone rubber with a thickness of 0.3-0.5 mm is installed at the rear of the chamber. When the sealed chamber is inserted into the reactor, the external sewage pressure is transferred to the silicone oil inside the chamber through the pressure balancing membrane, maintaining pressure balance between the inside and outside of the chamber and preventing excessive pressure difference on the radiation window. An O-ring (fluororubber) is provided at the mating surface between the radiation window and the front end of the chamber. The waterproof cable connector is sealed to the chamber using a tapered thread and sealant.

[0029] The working process of this invention is as follows: During operation, wastewater to be treated is injected into the water tank 1. The temperature control components 2 in the temperature control chambers 3 on both sides of the bottom regulate the wastewater temperature to ensure uniform distribution and stable water temperature. The ultrasonic chamber 4 achieves vibration reduction and noise reduction, energy concentration, and structural protection through a composite shell composed of a protective shell 401, a polyurethane vibration-absorbing layer 402, and a stainless steel structural layer 403. The ultrasonic transducers 5 arranged in a matrix inside generate ultrasonic waves, which are radiated into the wastewater through the top radiation window 404, forming a cavitation effect to degrade pollutants.

[0030] In the self-cleaning module 6, the spring guide post 602 continuously pushes the support ring 601 and the rotating ring 603 against the radiation window 404, causing the scraper 606 to press against the window surface at an angle of 5° to 15°. When the scraper 606 is pressed, the inclined blade 6062 generates a centripetal tangential force, causing the blade to slide at a micron level on the surface of the radiation window 404. This, combined with the circumferential rotation of the rotating ring 603 along the guide slider 604 and the guide groove, achieves continuous scraping of the window. The scraper seat 6061 is positioned and fixed by the central fulcrum 605 and the notch on the rotating ring 603, ensuring stable inclination and rigidity. The blade 6062 is made of PEEK or tungsten carbide coated stainless steel, which avoids scratching the window while efficiently scraping away dirt. The scraped dirt is promptly guided and discharged along the annular drainage groove and radial groove at the edge of the radiation window 404 to prevent secondary deposition, keeping the radiation window clean and transparent at all times, ensuring stable ultrasonic output, maintaining wastewater treatment efficiency, and the independent ultrasonic chamber structure facilitates later maintenance and replacement.

[0031] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An ultrasonic wastewater treatment device, characterized in that: The system includes a water tank (1), with an inlet pipe (8) on the upper part of the side wall and an outlet pipe (7) on the lower part of the side wall; an ultrasonic chamber (4) is provided at the bottom of the water tank (1), the ultrasonic chamber (4) includes a double-layer shell, the double-layer shell includes a radiation window (404) at the top, a number of ultrasonic transducers (5) arranged in a matrix are provided inside the ultrasonic chamber (4), and a self-cleaning module (6) is provided on the inner side wall of the radiation window (404).

2. The ultrasonic wastewater treatment device according to claim 1, characterized in that: Temperature control chambers (3) are integrally formed on both sides of the bottom of the water tank (1), and temperature control components (2) are installed inside the temperature control chambers (3).

3. The ultrasonic wastewater treatment device according to claim 1, characterized in that: The double-layer structure shell includes a protective shell (401), a polyurethane vibration-absorbing layer (402), and a stainless steel structural layer (403) arranged sequentially from the outside to the inside.

4. The ultrasonic wastewater treatment device according to claim 1, characterized in that: The self-cleaning module (6) includes a support ring (601). The end of the support ring (601) away from the radiation window (404) is connected to the bottom of the double-layer structure shell through a number of circumferentially distributed spring guide posts (602). A rotating ring (603) is concentrically arranged inside the support ring (601). The support ring (601) is slidably connected to the outer wall of the rotating ring (603) through a number of circumferentially distributed guide sliders (604). A central fulcrum (605) is provided at the center of the rotating ring (603). A number of scrapers (606) are circumferentially distributed between the central fulcrum (605) and the rotating ring (603). The scrapers (606) abut against the radiation window (404) under the elastic action of the spring guide posts (602).

5. The ultrasonic wastewater treatment device according to claim 4, characterized in that: The inner wall of the support ring (601) is provided with a guide groove that cooperates with the guide slider (604).

6. The ultrasonic wastewater treatment device according to claim 4, characterized in that: The scraper (606) includes a scraper seat (6061), and a blade (6062) is disposed below the scraper seat (6061). The scraper seat (6061) is designed with an obtuse angle.

7. The ultrasonic wastewater treatment device according to claim 6, characterized in that: Both the central fulcrum (605) and the rotating ring (603) have cuts for installing the scraper seat (6061).

8. The ultrasonic wastewater treatment device according to claim 6, characterized in that: The blade (6062) is made of polyetheretherketone (PEEK) or tungsten carbide coated stainless steel.

9. The ultrasonic wastewater treatment device according to claim 1, characterized in that: The scraper (606) is attached to the inner surface of the radiation window (404) at an angle of 5° to 15°.

10. The ultrasonic wastewater treatment device according to claim 4, characterized in that: The edge of the radiation window (404) is provided with an annular drain trough and a radial groove for discharging scraped dirt.

Images