Quality-based matching ultrasonic sewage treatment system

Abstract

The invention relates to the technical field of sewage treatment. The invention aims to provide a quality-based matching ultrasonic sewage treatment system. The quality-based matching ultrasonic sewage treatment system comprises a sewage spiral separation device and a sewage grading ultrasonic device which are communicated with each other, the sewage spiral separation device comprises a cylindrical separation tank, and a conical light phase collection chamber and a conical heavy phase collection chamber which are arranged at the upper end and the lower end of the separation tank; a water inlet for feeding water along the tangential direction of the separation tank is formed in one side of the separation tank; a spiral guide plate is arranged in the separation tank; the sewage grading ultrasonic device comprises a plurality of layers of laminar flow pipes which are arranged side by side up and down, and a plurality of ultrasonic treatment tanks. The ultrasonic power and the sewage quality can be well matched, the sewage treatment effect and the energy utilization rate are improved, and the integration degree is high.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a wastewater treatment system that matches different wastewater types. Background Technology

[0002] In the treatment of industrial and domestic wastewater, ultrasonic degradation technology is widely used for the advanced treatment of recalcitrant wastewater due to its ability to efficiently break down organic pollutant molecules and decompose tiny colloidal particles. Its core principle is that ultrasonic waves induce cavitation, creating a high-temperature, high-pressure environment that disrupts the chemical structure of pollutants, thereby achieving their degradation and removal.

[0003] However, existing ultrasonic wastewater treatment technologies generally suffer from the drawback of "treatment without differentiation of pollutants": wastewater often contains light scum (such as grease and foam), heavy sediment (such as silt and metal particles), and mesophase wastewater containing dissolved pollutants. When ultrasonic treatment is applied directly to the mixed wastewater, the light scum will block the ultrasonic propagation path, and the heavy sediment will easily wear down the ultrasonic transducer and interfere with the cavitation effect, resulting in a large amount of ultrasonic energy being wasted on non-target pollutants. This not only reduces the degradation efficiency of organic pollutants in the mesophase wastewater, but also leads to high treatment costs and rapid equipment wear.

[0004] To address these issues, some technologies attempt to add pretreatment steps before ultrasonic treatment, such as bar filtration and sedimentation tanks. However, these methods can only remove larger particles and cannot achieve precise separation of light, heavy, and intermediate phases in wastewater, still making it difficult to avoid interference from impurities in ultrasonic treatment. Other technologies use centrifugal separation devices for pretreatment, but the separated intermediate phase wastewater is prone to uneven concentration distribution due to turbulent flow. Subsequent ultrasonic treatment is still forced to use a "one-size-fits-all" power setting, failing to achieve precise energy matching based on wastewater concentration differences. This results in insufficient or excessive ultrasonic energy, still exhibiting low treatment efficiency and inadequate energy utilization.

[0005] Therefore, how to achieve accurate classification of wastewater through reasonable pretreatment and treatment process design, and how to match differentiated ultrasonic treatment solutions for wastewater of different concentrations in order to improve ultrasonic degradation efficiency and reduce energy consumption, has become a key issue that urgently needs to be solved in the field of ultrasonic wastewater treatment technology. Summary of the Invention

[0006] The purpose of this invention is to provide a quality-matching ultrasonic wastewater treatment system that can improve ultrasonic efficiency and enhance wastewater treatment quality.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a wastewater treatment system with quality matching, comprising a wastewater spiral separation device and a wastewater grading ultrasonic device that are interconnected.

[0008] The wastewater spiral separator includes a cylindrical separator tank and conical light phase collection chambers and heavy phase collection chambers located at the upper and lower ends of the separator tank. A water inlet is provided on one side of the separator tank, which is tangential to the separator tank. A spiral guide plate is provided inside the separator tank, and a distribution tank is provided at the center of the separator tank. The outer end of the guide plate is opposite to the water inlet, and a spiral fluid separation channel extending from the water inlet to the distribution tank is formed inside the separator tank through the separation of the guide plate.

[0009] The wastewater grading ultrasonic device includes several layers of laminar flow pipes arranged side by side, and several ultrasonic treatment tanks; one end of each laminar flow pipe is connected to the distribution tank of the wastewater spiral separator, and the other end is connected to the manifold tank; the ultrasonic treatment tanks are arranged at intervals along the length of the laminar flow pipes, and are all connected to the laminar flow pipes; an ultrasonic generator is provided at the bottom of each ultrasonic treatment tank.

[0010] Preferably, each laminar flow tube is equipped with a flow velocity sensor and a flow control valve for controlling the opening degree of the laminar flow tube end.

[0011] Preferably, the light phase collection chamber is provided with an exhaust pipe at the top and a light phase outlet pipe on the side; the heavy phase collection chamber is provided with a slag discharge pipe at the bottom and an air flotation inlet pipe on the side.

[0012] Preferably, an electrically controlled slag discharge valve is installed at the slag discharge pipe, and a slag discharge auger is installed inside the slag discharge pipe.

[0013] Preferably, the inlet is provided with a flat, funnel-shaped sewage inlet pipe.

[0014] Preferably, a flocculation sedimentation chamber is also provided on one side of the manifold, and the bottom of the manifold is connected to the flocculation sedimentation chamber through the manifold; a stirring device is provided in the flocculation sedimentation chamber, and a reagent storage tank is provided on one side; the reagent storage tank is connected to the flocculation sedimentation chamber through a dosing pipe; and a tailwater outlet is provided on one side of the flocculation sedimentation chamber.

[0015] Preferably, the system also includes a base, on which the sewage spiral separator, sewage grading ultrasonic device, and flocculation sedimentation chamber are all mounted. A sludge conveyor is installed inside the base, and the sludge discharge pipe of the separator and the sludge discharge pipe at the bottom of the flocculation sedimentation chamber are both connected to the sludge conveyor.

[0016] Preferably, the area inside the separation tank, except for the area where the fluid separation channel is located, is filled with foamed filler.

[0017] Preferably, each layer has at least two laminar flow tubes.

[0018] Preferably, three ultrasonic treatment tanks are provided.

[0019] The beneficial effects of this invention are mainly reflected in: achieving a good match between ultrasonic power and wastewater quality, improving wastewater treatment efficiency and energy utilization, and exhibiting a high degree of integration. During operation, wastewater enters the separation tank through the inlet along a tangential spiral. As it flows along the spiral fluid separation channel, under the influence of centrifugal force, the light phase (low-density impurities such as grease) floats, the heavy phase (high-density impurities such as mud and sand) sinks, and the intermediate phase (difficult-to-treat emulsified and organic wastewater) enters the distribution tank, achieving preliminary separation of the light, heavy, and intermediate phases. The heavy and light phases can be treated separately by specialized wastewater equipment such as filter presses and oil-water separators, improving treatment efficiency and reducing interference from heavy and light phase impurities on subsequent ultrasonic treatment. The pre-separated wastewater enters the distribution tank (still maintaining a lower concentration at the top and a higher concentration at the bottom). The wastewater flows out in layers along the laminar flow pipe and maintains a good laminar flow state as it passes through the ultrasonic treatment tank, where ultrasonic treatment is performed to achieve demulsification and separation. As wastewater flows through multiple ultrasonic treatment tanks, it maintains a consistently good laminar flow pattern. Wastewater in the lower layer is closer to the ultrasonic generator, while wastewater in the upper layer is further away. This perfectly matches the attenuation characteristics of ultrasound within the treatment tanks. Low-intensity ultrasound is applied to the lower-concentration wastewater in the upper layer (avoiding energy excess), while high-intensity ultrasound is applied to the higher-concentration wastewater in the lower layer (ensuring effective degradation). This completely solves the problem of energy waste or insufficiency in traditional ultrasonic treatment, significantly improving degradation efficiency. Simultaneously, the laminar flow reduces the scattering and attenuation of ultrasound by particles in the wastewater, further optimizing ultrasonic energy transfer efficiency. Furthermore, the progressively decreasing power design of the multiple ultrasonic treatment tanks further ensures the matching of ultrasonic energy with wastewater quality. In addition to matching ultrasonic power with the spatial distribution characteristics of the wastewater flow, the design also achieves matching of ultrasonic power with the treatment time characteristics of the wastewater flow. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the separator tank;

[0022] Figure 3 for Figure 1 The structure shown is viewed from direction AA.

[0023] Reference numerals: 0. Base; 1. Sewage spiral separator; 2. Sewage grading ultrasonic device; 3. Separation tank; 4. Light phase collection chamber; 5. Heavy phase collection chamber; 6. Inlet; 7. Baffle plate; 8. Distribution tank; 9. Fluid separation channel; 10. Laminar flow pipe; 11. Ultrasonic treatment tank; 12. Manifold; 13. Ultrasonic generator; 14. Flow velocity sensor; 15. Flow control valve; 16. Exhaust pipe; 17. Light phase outlet pipe; 18. Sludge discharge pipe; 19. Air flotation inlet pipe; 20. Electrically controlled sludge discharge valve; 21. Sewage inlet pipe; 22. Flocculation sedimentation chamber; 23. Chemical storage tank; 24. Tailwater outlet; 25. Foaming packing. Detailed Implementation

[0024] This invention relates to a differentiated ultrasonic wastewater treatment system for wastewater purification. It departs from the traditional, one-size-fits-all approach of ultrasonic wastewater purification, instead improving treatment precision and effectiveness through differentiated treatment of wastewater, while reducing energy consumption for the same treatment effect. Overall, as... Figure 1 As shown, the present invention includes a sewage spiral separator 1 and a sewage grading ultrasonic device 2 that are interconnected. The sewage spiral separator 1 is used to achieve preliminary separation of sewage, while the sewage grading ultrasonic device 2 is used to achieve stratified and quality-differentiated ultrasonic treatment of sewage.

[0025] Combination Figure 1 and 2 As shown, the wastewater spiral separator 1 includes a separation tank 3, and a light phase collection chamber 4 and a heavy phase collection chamber 5 disposed at the upper and lower ends of the separation tank 3. After wastewater enters the separation tank 3, the light phase collects in the light phase collection chamber 4, and the heavy phase settles in the heavy phase collection chamber 5. For this reason, the separation tank 3 is usually designed as a cylinder, while the light phase collection chamber 4 and the heavy phase collection chamber 5 are conical, which has a better collection effect.

[0026] like Figure 3 As shown, a water inlet 6 is provided on one side of the separator 3, tangentially into which water enters. A spiral guide plate 7 is provided inside the separator 3, and a distribution tank 8 is located at the center of the separator 3. The outer end of the guide plate 7 is opposite to the water inlet 6, and a spiral fluid separation channel 9 extending from the water inlet 6 to the distribution tank 8 is formed within the separator 3 through the separation of the guide plate 7. Figure 3 As shown, in order to further ensure the stability of the installation of the guide plate 7 and to fill and seal the area corresponding to the non-fluid separation channel 9, the remaining part of the separation tank 3, except for the area where the fluid separation channel 9 is located, is filled with foamed filler 25.

[0027] Wastewater enters the separator 3 through inlet 6 in a tangential spiral path. To ensure a stable tangential inflow of wastewater, such as... Figure 1As shown, a flat, trumpet-shaped sewage inlet pipe 21 can be installed at the inlet 6. During the flow along the spiral fluid separation channel 9, under the influence of centrifugal force, the light phase (low-density impurities such as grease) floats to the top, the heavy phase (high-density impurities such as mud and sand) sinks, and the intermediate phase (difficult-to-treat emulsified and organic sewage) enters the distribution tank 8, thus achieving the initial separation of the light, heavy, and intermediate phases. The heavy and light phases can be treated separately by dedicated sewage equipment such as filter presses and oil-water separators, which can improve treatment efficiency and reduce the interference of heavy and light phase impurities on subsequent ultrasonic treatment.

[0028] like Figure 2 As shown, to further improve the initial separation effect, the top of the light phase collection chamber 4 is equipped with an exhaust pipe 16, and the side is equipped with a light phase outlet pipe 17. The bottom of the heavy phase collection chamber 5 is equipped with a slag discharge pipe 18, and the side is equipped with an air flotation inlet pipe 19. In use, the light phase and heavy phase can be guided to the corresponding equipment through the light phase outlet pipe 17 and the slag discharge pipe 18, respectively, while the air flotation inlet pipe 19 can inject gas into the separation tank 3. The gas rises, which better and faster assists in the initial separation. The exhaust pipe 16 is used to discharge the injected gas. An electrically controlled slag discharge valve 20 is installed at the slag discharge pipe 18, and a slag discharge auger is installed inside the slag discharge pipe 18 to quickly send out impurities such as mud and sand deposited at the bottom of the heavy phase collection chamber 5.

[0029] The wastewater grading ultrasonic device 2 includes several layers of laminar flow pipes 10 arranged side by side, and several ultrasonic treatment tanks 11. For example... Figure 1 As shown, a total of 5 layers of laminar flow pipes 10 are provided. Typically, each layer has at least two laminar flow pipes 10 to meet the requirements for stable installation of the subsequent ultrasonic treatment tanks 11 and to increase the flow rate of each layer. One end of each laminar flow pipe 10 is connected to the distribution tank 8 of the sewage spiral separator 1, and the other end is connected to the manifold tank 12. The ultrasonic treatment tanks 11 are arranged at intervals along the length of the laminar flow pipes 10 and are all connected to the laminar flow pipes 10; that is, the laminar flow pipe 10 can be considered as being composed of several short pipe segments, with each short pipe of each laminar flow pipe 10 sequentially connected to each ultrasonic treatment tank 11. An ultrasonic generator 13 is provided at the bottom of each ultrasonic treatment tank 11 to form an ultrasonic field distribution with a strong lower part and a weak upper part within the ultrasonic treatment tank 11 (determined by the attenuation of ultrasonic waves propagating in water).

[0030] The initially separated wastewater enters the distribution tank 8. Due to the centrifugal force of the water flow, it generally maintains a lower concentration in the upper layer and a higher concentration in the lower layer. The wastewater flows out in layers along the laminar flow pipe 10 and maintains a good laminar flow state as it passes through the ultrasonic treatment tank 11. In the ultrasonic treatment tank 11, it undergoes stepped ultrasonic treatment (typically, the ultrasonic generator 13 in the ultrasonic treatment tank 11 closer to the separation tank 3 has a higher power, gradually decreasing towards the distance from the separation tank 3). Figure 1The flow rate gradually decreases from left to right, achieving demulsification and separation. During the flow of wastewater through multiple ultrasonic treatment tanks 11, a good laminar flow state is maintained throughout. Wastewater in the lower layer is closer to the ultrasonic generator 13, while wastewater in the upper layer is further away. This perfectly matches the attenuation characteristics of ultrasound within the ultrasonic treatment tanks 11. Low-intensity ultrasound is applied to the low-concentration wastewater in the upper layer (to avoid energy excess), while high-intensity ultrasound is applied to the high-concentration wastewater in the lower layer (to ensure degradation effect). This completely solves the problem of energy waste or insufficiency in traditional one-size-fits-all ultrasonic treatment, significantly improving degradation efficiency. Simultaneously, the laminar flow reduces the scattering and attenuation of ultrasound by particles in the wastewater, further optimizing ultrasonic energy transfer efficiency. Furthermore, the progressively decreasing power design of the multiple ultrasonic treatment tanks 11 further ensures the matching of ultrasonic energy with wastewater quality. In addition to matching ultrasonic power with the spatial distribution characteristics of the wastewater flow (within each ultrasonic treatment tank 11), the matching of ultrasonic power with the treatment time characteristics of the wastewater flow (multiple ultrasonic treatment tanks 11 process wastewater sequentially) is also achieved. As shown in the figure, there are three ultrasonic treatment tanks 11. In actual treatment, more or fewer tanks can be set depending on the water quality of different water bodies.

[0031] To further stabilize the laminar flow within each laminar flow tube 10 and ensure a stable fluid velocity, a flow velocity sensor 14 and a flow control valve 15 for controlling the opening degree of the laminar flow tube 10 are installed at the ends of each laminar flow tube 10. By changing the opening degree of the flow control valve 15, the fluid resistance of each laminar flow tube 10 is adjusted, thereby achieving flow velocity control and ensuring the steady state of laminar flow.

[0032] In addition, the present invention also integrates a flocculation and sedimentation device, such as Figure 1 As shown, a flocculation settling chamber 22 is also provided on one side of the manifold 12, and the bottom of the manifold 12 is connected to the flocculation settling chamber 22 through the manifold 12. A stirring device is provided inside the flocculation settling chamber 22, and a reagent storage tank 23 is provided on one side. The stirring device can be designed with reference to various existing spiral stirrers, paddle stirrers, etc., and will not be described in detail in this invention. The reagent storage tank 23 is connected to the flocculation settling chamber 22 through a dosing pipe. A tailwater outlet 24 is provided on one side of the flocculation settling chamber 22 for discharging purified tailwater.

[0033] like Figure 1 As shown, for ease of overall installation, the present invention also includes a base 0. The sewage spiral separator 1, the sewage grading ultrasonic device 2, and the flocculation sedimentation chamber 22 are all mounted on the base 0. A sludge conveyor (usually a spiral conveyor) is installed inside the base 0. The sludge discharge pipe 18 of the separation tank 3 and the sludge discharge pipe at the bottom of the flocculation sedimentation chamber 22 are both connected to the sludge conveyor to guide the sludge to the subsequent filter press equipment.

Claims

1. A differentiated ultrasonic wastewater treatment system, characterized in that: It includes an interconnected sewage spiral separator (1) and a sewage grading ultrasonic device (2); The sewage spiral separator (1) includes a cylindrical separator (3), and conical light phase collection chamber (4) and heavy phase collection chamber (5) located at the upper and lower ends of the separator (3); a water inlet (6) is provided on one side of the separator (3) tangentially to the separator (3); a spiral guide plate (7) is provided inside the separator (3); a distribution tank (8) is provided at the center of the separator (3); the outer end of the guide plate (7) is opposite to the water inlet (6), and a spiral fluid separation channel (9) extending from the water inlet (6) to the distribution tank (8) is formed in the separator (3) through the separation of the guide plate (7); The wastewater grading ultrasonic device (2) includes several layers of laminar flow pipes (10) arranged side by side, and several ultrasonic treatment tanks (11); one end of the laminar flow pipe (10) is connected to the distribution tank (8) of the wastewater spiral separator (1), and the other end is connected to the manifold tank (12); the ultrasonic treatment tanks (11) are arranged at intervals along the length of the laminar flow pipe (10), and are all connected to the laminar flow pipe (10); an ultrasonic generator (13) is provided at the bottom of the ultrasonic treatment tank (11).

2. The ultrasonic wastewater treatment system with differentiated treatment according to claim 1, characterized in that: Each laminar flow tube (10) is equipped with a flow velocity sensor (14) and a flow control valve (15) for controlling the opening degree of the laminar flow tube (10).

3. The ultrasonic wastewater treatment system with differentiated treatment according to claim 1, characterized in that: The top of the light phase collection chamber (4) is provided with an exhaust pipe (16) and the side is provided with a light phase outlet pipe (17); the bottom of the heavy phase collection chamber (5) is provided with a slag discharge pipe (18) and the side is provided with an air flotation inlet pipe (19).

4. The ultrasonic wastewater treatment system with differentiated treatment according to claim 3, characterized in that: An electrically controlled slag discharge valve (20) is installed at the slag discharge pipe (18), and a slag discharge auger is installed inside the slag discharge pipe (18).

5. The ultrasonic wastewater treatment system with differentiated treatment according to claim 1, characterized in that: A flat, trumpet-shaped sewage inlet pipe (21) is provided at the inlet (6).

6. The ultrasonic wastewater treatment system with differentiated treatment according to claim 1, characterized in that: A flocculation settling chamber (22) is also provided on one side of the manifold (12). The bottom of the manifold (12) is connected to the flocculation settling chamber (22) through the manifold (12). A stirring device is provided in the flocculation settling chamber (22), and a chemical storage tank (23) is provided on one side. The chemical storage tank (23) is connected to the flocculation settling chamber (22) through a chemical dosing pipe. A tailwater outlet (24) is provided on one side of the flocculation settling chamber (22).

7. The ultrasonic wastewater treatment system with differentiated treatment according to claim 6, characterized in that: It also includes a base (0), the sewage spiral separator (1), the sewage grading ultrasonic device (2) and the flocculation sedimentation chamber (22) are all set on the base (0), a sludge conveyor is set in the base (0), and the sludge discharge pipe (18) of the separator (3) and the sludge discharge pipe at the bottom of the flocculation sedimentation chamber (22) are both connected to the sludge conveyor.

8. The ultrasonic wastewater treatment system with differentiated treatment according to claim 1, characterized in that: Except for the area where the fluid separation channel (9) is located, the remaining part of the separation tank (3) is filled with foamed filler (25).

9. The ultrasonic wastewater treatment system with differentiated treatment according to claim 1, characterized in that: Each layer of laminar flow tubes (10) is provided with at least two tubes.

10. The ultrasonic wastewater treatment system with differentiated treatment according to claim 9, characterized in that: The ultrasonic treatment tank (11) is provided in three parts.

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