A sewage treatment device with coaxial radiation antenna combined with power division structure
By combining a coaxial radiating antenna device with a power divider structure, and employing a stepped impedance matching and multi-layer I-shaped slot array design, the impedance matching problem of traditional devices is solved, achieving uniform radiation of microwave energy and equipment protection, thereby improving sewage treatment efficiency and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING QIYUAN HUITONG WATER TECH CO LTD
- Filing Date
- 2026-06-23
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional T-junction power dividers cannot achieve impedance matching and high isolation. Coaxial slot radiators have uneven electromagnetic field distribution in high-loss water media, which easily forms local hot spots and is easily corroded by sewage, making it difficult to achieve uniform heating and treatment of large volumes of liquid.
The system employs a power divider combined waveguide coaxial conversion component, a coaxial transition connection component, a coaxial slot radiator, and a polytetrafluoroethylene external protection device. Through a stepped impedance matching structure and a multi-layer I-shaped slot array design, it achieves uniform radiation and protection of microwave energy, and avoids equipment corrosion.
It improves microwave energy transmission efficiency, ensures radiation uniformity, prevents local hot spots and equipment corrosion, extends service life, and adapts to the treatment needs of different wastewater depths.
Smart Images
Figure CN122444263A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of microwave heating technology, and particularly relates to a wastewater treatment device with a coaxial radiating antenna incorporating a power divider structure. Background Technology
[0002] The development of microwave heating technology has roughly evolved from "using microwaves to heat materials" to "injecting energy into processes in a controllable, uniform, and efficient manner." Microwave heating technology has gradually developed from early food heating applications into engineered equipment for industrial scenarios, with its core objective being to achieve controllable, uniform, and efficient energy injection. In the field of industrial wastewater treatment, microwave catalytic oxidation technology, with its advantages of rapid heating and low activation energy, has become an important means of treating recalcitrant organic pollutants.
[0003] The T-junction power divider is a core component of microwave energy distribution. It is a classic and fundamental three-port microwave network structure that distributes or combines electromagnetic energy through simple transmission line branching. Due to its compact structure, flexible design, and low insertion loss, it is widely used in antenna array feed networks and microwave signal processing systems. However, traditional lossless T-junctions are limited by the reciprocity principle of microwave network theory, making it impossible to simultaneously achieve impedance matching at all ports and high isolation between output ports without introducing lossy components. As a result, in practical applications, if the load of one output branch is mismatched, the resulting reflected signal will directly interfere with another branch, seriously affecting the signal integrity and transmission stability of the system.
[0004] Coaxial slot radiators are key devices for coupling microwave energy into wastewater. They are microwave energy emitting devices based on a coaxial transmission line structure. By opening a specific slot array in the outer conductor, electromagnetic waves are coupled to the surrounding medium in the near field. Due to their compact structure, ease of immersion deployment, and high energy coupling efficiency, they are widely used in the fields of microwave catalytic oxidation of industrial wastewater and treatment of recalcitrant organic pollutants.
[0005] However, when applied to high-loss water media, coaxial slot radiators currently suffer from extremely uneven electromagnetic field distribution at the slot, which easily leads to local "hot spots" near the radiation port, causing liquid to boil violently or pollutants to coke and adhere, seriously affecting radiation efficiency and equipment lifespan, and making it difficult to achieve uniform heating and treatment of large volumes of liquid. Summary of the Invention
[0006] To address the problems existing in the prior art, this invention provides a wastewater treatment device with a coaxial radiating antenna combined with a power divider structure. It has the advantages of high microwave energy transmission efficiency, good radiation uniformity, dynamic optimization of impedance matching, corrosion resistance and pollution prevention, and strong structural adaptability. It solves the problems in the prior art, such as power divider load mismatch causing signal interference, uneven electromagnetic field distribution of coaxial slot radiators causing local hot spots, low waveguide-coaxial conversion efficiency, and radiators being easily corroded by wastewater and prone to pollution.
[0007] This invention is implemented as follows: a wastewater treatment device combining a power divider structure with a coaxial radiating antenna, comprising a power divider combined waveguide coaxial conversion component, a coaxial transition connection component, a coaxial slot radiator, and a polytetrafluoroethylene (PTFE) external protection device; the power divider combined waveguide coaxial conversion component: the power divider combined waveguide coaxial conversion component uses a BJ9 standard waveguide port to feed microwaves, converts them to coaxial transmission mode through a stepped impedance matching structure, and its output end is an air coaxial port with high power capacity for achieving equal energy distribution; the coaxial transition connection component: the coaxial transition connection component is used to connect the power divider combined waveguide coaxial conversion component and the coaxial slot radiator, and its length can be adjusted according to the depth of wastewater treatment; the coaxial slot radiator: an I-shaped slot array is formed on the outer conductor of the coaxial slot radiator, and the bottom of the coaxial slot radiator is slotted and filled with PTFE dielectric.
[0008] With this setup, high-power microwaves are fed from the BJ9 standard waveguide port into the power divider combined with the waveguide-coaxial conversion component. The waveguide transmission mode is converted to the coaxial transmission mode through a stepped impedance matching structure. At the same time, the microwave energy is divided equally into two 50Ω impedance coaxial ports. The microwave energy is then transmitted to the coaxial slot radiator through the coaxial transition connection component. Finally, the microwaves are radiated into the sewage through the I-shaped slot array of the outer conductor, realizing the microwave catalytic oxidation treatment of the sewage. The polytetrafluoroethylene medium filled at the bottom can fix the inner conductor of the radiator and prevent the displacement of the inner conductor from affecting the microwave radiation effect.
[0009] As a preferred embodiment of the present invention, the polytetrafluoroethylene external protective device uses a sleeve with a thickness of 10 mm, and the sleeve is fitted onto the outside of the coaxial slot radiator.
[0010] With this setup, during use, the 10mm thick PTFE sleeve can form a full-around protective enclosure for the coaxial slot radiator without affecting the microwave energy penetration radiation, thus preventing sewage from directly contacting the radiator's metal components.
[0011] As a preferred embodiment of the present invention, the stepped impedance matching structure of the power divider combined waveguide-coaxial conversion component has a total height of 70.44 mm, including stepped segments of 30 mm, 23.48 mm, 35 mm, and 46.96 mm, with a horizontal segment length of 68 mm. This stepped design of specific dimensions is used to achieve a smooth transition from waveguide transmission mode to coaxial transmission mode.
[0012] With this setup, the stepped impedance matching structure of this specific size can achieve precise impedance matching between the waveguide and the coaxial cable during use, significantly reducing reflection loss during microwave transmission and enabling microwave energy to be transmitted from the waveguide port to the coaxial port with high efficiency, thus meeting the transmission requirements of 922MHz high-power microwaves.
[0013] As a preferred embodiment of the present invention, the power divider combined waveguide coaxial converter is equipped with an adjustable pin for dynamically optimizing impedance matching under different wastewater dielectric properties.
[0014] With this setting, the position and insertion depth of the pin can be adjusted according to the difference in dielectric parameters of the wastewater to be treated, dynamically optimizing the impedance matching effect of the power divider combined with waveguide coaxial converter. Even if the wastewater quality changes, it can ensure the stable and efficient transmission of microwave energy and avoid interference with system operation caused by reflected signals due to load mismatch.
[0015] As a preferred embodiment of the present invention, the I-shaped slot array of the coaxial slot radiator is configured as multiple layers, each layer containing multiple I-shaped slots, in order to improve radiation efficiency.
[0016] With this setup, during use, the multi-layered and multi-numbered I-shaped slot array can uniformly release microwave energy into the sewage from multiple radiation points, changing the uneven electromagnetic field distribution of traditional radiators, effectively avoiding the formation of local "hot spots" near the radiation port, and preventing sewage from boiling over and pollutants from coking and adhering to the radiator surface.
[0017] As a preferred embodiment of the present invention, the polytetrafluoroethylene external protection device physically isolates the coaxial slot radiator from sewage, thereby preventing equipment corrosion and sewage from entering the interior of the radiator.
[0018] With this setup, the corrosion-resistant properties of PTFE can effectively resist the erosion of the metal components of the radiator by corrosive media in industrial wastewater, extending the service life of the equipment. At the same time, the physical isolation method can completely prevent wastewater from seeping into the radiator and causing problems such as short circuits in the internal conductors and damage to the devices, ensuring the stable operation of the radiator.
[0019] As a preferred embodiment of the present invention, the coaxial transition connection component, as a connecting component, adopts a coaxial matching design to flexibly adjust its length according to the actual sewage treatment depth, while ensuring low-loss transmission of microwave energy.
[0020] With this setup, the length of the coaxial transition connection component can be flexibly cut or spliced according to the actual depth of the sewage tank or reactor, allowing the coaxial slit radiator to penetrate into sewage at different depths to achieve uniform radiation. Furthermore, the coaxial matching design ensures that microwave energy loss during transmission is minimized, without affecting the overall energy utilization efficiency.
[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0022] High energy transmission efficiency: By adopting a stepped impedance matching design at the coaxial conversion point of the power divider waveguide, a smooth transition from the waveguide port to the coaxial port is naturally achieved, solving the reflection problem under high power input and enabling microwave energy to be transmitted to the coaxial end with high efficiency.
[0023] Good radiation uniformity: The I-shaped slot array design ensures that the electromagnetic field is evenly distributed in the sewage, avoiding local "hot spots", preventing sewage from boiling over and pollutants from coking, effectively improving the treatment effect and the service life of the equipment;
[0024] Strong environmental adaptability: The 10mm thick PTFE protective device effectively isolates sewage from metal parts, solving the equipment corrosion problem, while not affecting microwave energy transmission;
[0025] Flexible and adjustable structure: The length of the coaxial transition connection structure can be adjusted according to the treatment depth to adapt to the wastewater depth requirements of different industrial scenarios. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;
[0027] Figure 2 This is a schematic diagram of the power divider combined waveguide coaxial converter component provided in an embodiment of the present invention;
[0028] Figure 3 This is a side view schematic diagram of the stepped impedance matching structure provided in an embodiment of the present invention;
[0029] Figure 4 This is a schematic diagram of the coaxial transition connection component structure provided in an embodiment of the present invention;
[0030] Figure 5 This is a schematic diagram of the coaxial slot radiator structure provided in an embodiment of the present invention;
[0031] Figure 6 This is a schematic diagram of the polytetrafluoroethylene external protection device provided in an embodiment of the present invention.
[0032] In the diagram: 1. Power divider combined waveguide coaxial conversion component; 2. Coaxial transition connection component; 3. Coaxial slot radiator; 4. PTFE external protection device. Detailed Implementation
[0033] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.
[0034] The structure of the present invention will now be described in detail with reference to the accompanying drawings.
[0035] refer to Figures 1 to 6 As shown in the figure, an embodiment of the present invention provides a coaxial radiating antenna sewage treatment device with a power divider structure, including a power divider combined waveguide coaxial conversion component 1, a coaxial transition connection component 2, a coaxial slot radiator 3, and a polytetrafluoroethylene (PTFE) external protection device 4; the power divider combined waveguide coaxial conversion component 1: the power divider combined waveguide coaxial conversion component 1 uses BJ9 standard waveguide ports to feed microwaves, and converts them to coaxial transmission mode through a stepped impedance matching structure. Its output end is two air coaxial ports with high power capacity, used to achieve equal energy distribution; the coaxial transition connection component 2: the coaxial transition connection component 2 is used to connect the power divider combined waveguide coaxial conversion component 1 and the coaxial slot radiator 3, and its length can be adjusted according to the sewage treatment depth; the coaxial slot radiator 3: the outer conductor of the coaxial slot radiator 3 has an I-shaped slot array, and the bottom of the coaxial slot radiator 3 is slotted and filled with PTFE dielectric.
[0036] Using the above scheme, high-power microwaves are fed into the power divider combined with waveguide coaxial conversion component 1 from the BJ9 standard waveguide port. The conversion from waveguide transmission mode to coaxial transmission mode is achieved through a stepped impedance matching structure. At the same time, the microwave energy is divided equally into two 50Ω impedance coaxial ports. The microwave energy is then transmitted to the coaxial slot radiator 3 through the coaxial transition connection component 2. Finally, the microwaves are radiated into the sewage through the I-shaped slot array of the outer conductor to achieve microwave catalytic oxidation treatment of the sewage. The polytetrafluoroethylene medium filled at the bottom can fix the inner conductor of the radiator and prevent the displacement of the inner conductor from affecting the microwave radiation effect.
[0037] Specifically, the polytetrafluoroethylene external protective device 4 uses a sleeve with a thickness of 10mm, and the sleeve is fitted onto the outside of the coaxial slit radiator 3.
[0038] Using the above solution, a 10mm thick polytetrafluoroethylene sleeve can form a full-range protective enclosure for the coaxial slot radiator 3 without affecting the microwave energy penetration radiation, thus preventing sewage from directly contacting the metal parts of the radiator.
[0039] Specifically, the stepped impedance matching structure of the power divider combined waveguide-coaxial conversion component 1 has a total height of 70.44 mm, including stepped segments of 30 mm, 23.48 mm, 35 mm, and 46.96 mm, with a horizontal segment length of 68 mm. This stepped design of specific dimensions is used to achieve a smooth transition from waveguide transmission mode to coaxial transmission mode.
[0040] Using the above scheme, the stepped impedance matching structure of this specific size can achieve precise impedance matching between the waveguide and the coaxial cable, significantly reducing reflection loss during microwave transmission, and enabling microwave energy to be transmitted from the waveguide port to the coaxial port with high efficiency, thus meeting the transmission requirements of 922MHz high-power microwaves.
[0041] Specifically, the power divider combined waveguide coaxial converter 1 is equipped with an adjustable pin for dynamically optimizing impedance matching under different wastewater dielectric properties.
[0042] By adopting the above scheme, the position and insertion depth of the pin can be adjusted according to the difference in dielectric parameters of the wastewater to be treated, and the impedance matching effect of the power divider combined with waveguide coaxial conversion component 1 can be dynamically optimized. Even if the wastewater quality changes, the stable and efficient transmission of microwave energy can be guaranteed, and the system operation can be avoided due to reflection signals caused by load mismatch.
[0043] Specifically, the coaxial slot radiator 3 has an I-shaped slot array configured as multiple layers, with each layer containing multiple I-shaped slots to improve radiation efficiency.
[0044] Using the above scheme, a multi-layered and multi-numbered I-shaped slot array can uniformly release microwave energy into the sewage from multiple radiation points, changing the uneven distribution of electromagnetic fields in traditional radiators, effectively avoiding the formation of local "hot spots" near the radiation port, and preventing sewage from boiling over and pollutants from coking and adhering to the surface of the radiator.
[0045] Specifically, the polytetrafluoroethylene external protection device 4 physically isolates the coaxial slot radiator 3 from the sewage to prevent equipment corrosion and sewage from entering the interior of the radiator.
[0046] By adopting the above solution, the corrosion resistance of polytetrafluoroethylene can effectively resist the erosion of the metal parts of the radiator by corrosive media in industrial wastewater, extend the service life of the equipment, and at the same time, the physical isolation method can completely prevent wastewater from seeping into the interior of the radiator and causing problems such as short circuits in the internal conductors and damage to the devices, thus ensuring the stable operation of the radiator.
[0047] Specifically, the coaxial transition connection component 2, as a connecting component, adopts a coaxial matching design to flexibly adjust its length according to the actual sewage treatment depth, while ensuring low-loss transmission of microwave energy.
[0048] By adopting the above scheme, the length of the coaxial transition connection component 2 can be flexibly cut or spliced according to the actual depth of the sewage tank and the reactor, so that the coaxial slit radiator 3 can penetrate into sewage at different depths to achieve uniform radiation. Moreover, the coaxial matching design can ensure that the loss of microwave energy during transmission is minimized and does not affect the overall energy utilization efficiency.
[0049] Working principle of the invention:
[0050] In operation, a 922MHz high-power microwave is fed from the BJ9 standard waveguide port into the power divider combined with the waveguide-coaxial converter 1. Through a stepped impedance matching structure of specific dimensions, a smooth transition from waveguide transmission mode to coaxial transmission mode is achieved. Adjustable pins can dynamically optimize impedance matching based on the dielectric characteristics of the wastewater, significantly improving energy transmission efficiency and effectively reducing reflection loss. Simultaneously, the microwave energy is equally distributed to two 50Ω impedance coaxial ports. The microwave energy is then transmitted to the coaxial slot radiator 3 via the coaxial transition connector 2. This transition connector employs a coaxial matching design, allowing for flexible length adjustment based on the depth of the wastewater. The process ensures low-loss transmission of microwave energy. Ultimately, the microwave energy is evenly released into the sewage through the multi-layer I-shaped slot array of the outer conductor, avoiding the formation of local "hot spots" and enabling the microwave energy to be efficiently coupled into the sewage, stimulating catalytic oxidation reactions and degrading recalcitrant organic pollutants. The polytetrafluoroethylene medium filled at the bottom can fix the inner conductor of the radiator, preventing the displacement of the inner conductor from affecting the microwave radiation effect. In addition, the 10mm thick polytetrafluoroethylene external protection device 4 physically isolates the coaxial slot radiator 3 from the sewage, resisting sewage corrosion and preventing sewage from seeping into the interior of the radiator. Combined with the modular design of each component, it ensures the long-term stable operation of the equipment.
[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A wastewater treatment device incorporating a coaxial radiating antenna with a power divider structure, characterized in that: It includes a power-dividing waveguide coaxial conversion component (1), a coaxial transition connection component (2), a coaxial slot radiator (3), and a polytetrafluoroethylene external protection device (4). Power-sharing combined waveguide coaxial conversion component (1): The power-sharing combined waveguide coaxial conversion component (1) uses BJ9 standard waveguide ports to feed microwaves, and converts them into coaxial transmission mode through a stepped impedance matching structure. Its output end is two 50Ω impedance air coaxial ports with high power capacity, which are used to realize the equal distribution of energy. Coaxial transition connection component (2): The coaxial transition connection component (2) is used to connect the power divider combined waveguide coaxial conversion component (1) and the coaxial slot radiator (3), and its length can be adjusted according to the depth of sewage treatment; Coaxial slot radiator (3): The outer conductor of the coaxial slot radiator (3) is provided with an I-shaped slot array, and the bottom of the coaxial slot radiator (3) is slotted and filled with polytetrafluoroethylene medium.
2. The wastewater treatment device with a coaxial radiating antenna combined with a power divider structure as described in claim 1, characterized in that: The polytetrafluoroethylene external protective device (4) uses a sleeve with a thickness of 10 mm, and the sleeve is fitted onto the outside of the coaxial slit radiator (3).
3. The wastewater treatment device with a coaxial radiating antenna combined with a power divider structure as described in claim 1, characterized in that: The stepped impedance matching structure of the power divider combined waveguide coaxial conversion component (1) has a total height of 70.44 mm, including stepped segments of 30 mm, 23.48 mm, 35 mm and 46.96 mm, and a horizontal segment length of 68 mm. This specific stepped design is used to achieve a smooth transition from waveguide transmission mode to coaxial transmission mode.
4. A wastewater treatment device with a coaxial radiating antenna incorporating a power divider structure as described in claim 1, characterized in that: The power divider combined waveguide coaxial converter component (1) is equipped with an adjustable pin for dynamically optimizing impedance matching under different wastewater dielectric properties.
5. A wastewater treatment device with a coaxial radiating antenna incorporating a power divider structure as described in claim 1, characterized in that: The coaxial slot radiator (3) has an I-shaped slot array configured as multiple layers, each layer containing multiple I-shaped slots, to improve radiation efficiency.
6. A wastewater treatment device with a coaxial radiating antenna incorporating a power divider structure as described in claim 1, characterized in that: The polytetrafluoroethylene external protection device (4) physically isolates the coaxial slot radiator (3) from the sewage to prevent equipment corrosion and sewage from entering the interior of the radiator.
7. A wastewater treatment device with a coaxial radiating antenna incorporating a power divider structure as described in claim 6, characterized in that: The power divider combined waveguide coaxial converter (1) is adapted to 922MHz±10MHz high-power microwave input.
8. A wastewater treatment device with a coaxial radiating antenna incorporating a power divider structure as described in claim 1, characterized in that: The coaxial transition connection component (2) serves as a connection component and adopts a coaxial matching design to flexibly adjust its length according to the actual sewage treatment depth, while ensuring low-loss transmission of microwave energy.