Ultrasonic suspended matter settling sedimentation tank

Abstract

This application relates to an ultrasonic suspended solids sedimentation tank, belonging to the field of wastewater treatment. The ultrasonic suspended solids sedimentation tank includes a sedimentation tank, two first and two second diversion plates installed within the sedimentation tank, and multiple ultrasonic transducers installed on a support net. Ultrasonic sedimentation is performed using different numbers of ultrasonic transducers arranged in the first, second, and third zones. This application experimentally determined the optimal distribution of ultrasonic transducers in the first, second, and third zones and along the five water flow paths: A = 3, B = 2, and C = 4. This configuration achieves a simultaneous improvement in sedimentation effect across all zones within the sedimentation tank and a more uniform treatment effect, solving the problem in existing ultrasonic sedimentation tanks where the acceleration effect of suspended solids sedimentation is not significant in areas far from the wastewater inlet, and may even result in a decrease in the sedimentation rate.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment, and in particular to an ultrasonic suspended solids sedimentation tank. Background Technology

[0002] As a crucial part of the water treatment process, the quenching water sedimentation tank plays a vital role in settling and separating pollutants and purifying the water. However, in actual production, the daily water volume treated by the quenching water sedimentation tank is relatively large, and the settling efficiency often fails to meet expectations. Currently, the most widely used device is the ultrasonic settling device.

[0003] Existing ultrasonic sedimentation tanks accelerate the settling of suspended solids using ultrasound. Because suspended particles in quenching water exhibit flocculation, when these flocculated particles enter the sedimentation tank, the uneven flow velocity distribution and velocity gradient within the tank cause particle collisions, further promoting flocculation. Ultrasonic devices can accelerate this process. Theoretically, under the influence of ultrasound, the acceleration effect on the settling of suspended solids in any area of ​​the ultrasonic sedimentation tank should be significant. However, in practice, it has been found that the acceleration effect on the settling of suspended solids is not significant in areas far from the wastewater inlet, and in some cases, the settling velocity even decreases.

[0004] There is currently no effective solution to the problem that existing ultrasonic sedimentation tanks do not significantly accelerate the settling of suspended solids in areas far from the sewage inlet, and may even cause a decrease in the settling speed of suspended solids. Summary of the Invention

[0005] This invention provides an ultrasonic sedimentation tank for suspended solids, which solves the problem that existing ultrasonic sedimentation tanks do not have a significant effect on accelerating the settling of suspended solids in areas far from the sewage inlet, and may even experience a decrease in the settling speed of suspended solids.

[0006] This invention provides an ultrasonic suspended solids sedimentation tank, comprising a sedimentation tank, two first guide plates and two second guide plates installed within the sedimentation tank, and multiple ultrasonic transducers installed on a support net. A channel steel frame is installed in the middle of the sedimentation tank, and a support net is installed on the channel steel frame. The channel steel frame includes a horizontal bar, a first vertical bar, and a second vertical bar, which divide the sedimentation tank into a first region, a second region, and a third region. The vertical projections of the inlet and outlet of the sedimentation tank are located at the two ends of the horizontal bar, respectively. Two first diversion plates and two second diversion plates are mirror-distributed on both sides of the crossbar, with the two second diversion plates positioned between the two first diversion plates. The first ends of the two first diversion plates and two second diversion plates are installed at the inlet and are used to equally divide the water flow at the inlet. The second ends of the two first diversion plates extend to the first vertical bar, and the second ends of the two second diversion plates extend to the second vertical bar. The two first diversion plates divide the first region into three first sub-regions, and the two second diversion plates divide the second region into three second sub-regions. A ultrasonic transducers are distributed in each of the two first sub-regions that are in contact with the boundary of the sedimentation tank, B ultrasonic transducers are distributed in each of the three second sub-regions, and C ultrasonic transducers are distributed in the third region. Among these, 2A > C > A > B.

[0007] Furthermore, A is 3, B is 2, and C is 4.

[0008] Furthermore, the second ends of the two first drainage plates are mirror-bent and extend to the first vertical bar, and the two first drainage plates protrude towards the horizontal bar. The second ends of the two second drainage plates are mirror-bent and extend to the second vertical bar, and the two second drainage plates protrude towards the horizontal bar.

[0009] Furthermore, the support mesh is made of corrosion-resistant metal.

[0010] Furthermore, the support netting covers the cross-section of the middle part of the sedimentation tank, forming a primary buffer settling zone from the middle of the sedimentation tank down to the bottom.

[0011] Furthermore, an ultrasonic generator is installed in the middle of the inner wall of the sedimentation tank, away from the inlet, and the ultrasonic generator is electrically connected to multiple ultrasonic transducers.

[0012] Furthermore, a sludge zone is set at the bottom of the sedimentation tank, and a sludge outlet is set in the sludge zone to discharge the sludge generated after sedimentation.

[0013] Furthermore, a secondary inclined plate packing settling zone is set in the upper part of the sedimentation tank, and an outlet weir is set above the secondary inclined plate packing settling zone. The outlet is located on the top of the sedimentation tank away from the inlet.

[0014] Furthermore, an isolation membrane is installed on the inner wall of the sedimentation tank. The isolation membrane is used to prevent corrosion of the inner wall of the sedimentation tank and to isolate ultrasonic waves.

[0015] Furthermore, the barrier membrane is composed of layers of polyester fiber, ethylene propylene rubber, and asphalt mineral wool, with the polyester fiber layer applied to the inner wall of the sedimentation tank.

[0016] Compared with related technologies, the present invention has the following beneficial effects: 1. By using different numbers of ultrasonic transducers in the first, second, and third zones, ultrasonic sedimentation is performed on the water flow in each zone. This avoids the reduction in sedimentation efficiency caused by excessive use of ultrasonic waves. To improve the sedimentation effect, this application experimentally determined the optimal distribution of ultrasonic transducers in the first, second, and third zones and along the five water flow paths: A = 3, B = 2, and C = 4. This configuration achieves a simultaneous improvement in sedimentation effect across all zones of the sedimentation tank and a more uniform treatment effect, solving the problem in existing technologies where the acceleration effect of suspended solids sedimentation is not significant in areas far from the wastewater inlet, and may even result in a decrease in the sedimentation rate of suspended solids.

[0017] 2. By optimizing the structure of the first and second diversion plates, the water flow rates processed in the first and second sub-regions become more reasonable.

[0018] 3. A sludge zone can be set up at the bottom of the sedimentation tank, with a sludge outlet in the sludge zone to discharge the sludge generated after sedimentation. This allows for rapid sludge collection and treatment, and pipes can be installed in the sludge zone to directly discharge the sludge, improving treatment efficiency.

[0019] 4. An isolation membrane is installed to prevent corrosion of the inner wall of the sedimentation tank and to isolate ultrasonic waves, making the device operate more stably.

[0020] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of the ultrasonic suspended solids sedimentation tank in this embodiment. Figure 1 ; Figure 2 yes Figure 1 A schematic diagram of the installation of the central steel frame, support mesh, and ultrasonic transducer. Figure 3 This is a schematic diagram of the internal structure of the ultrasonic suspended solids sedimentation tank in this embodiment. Figure 2 . Detailed Implementation

[0022] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0023] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to these processes, methods, products, or devices. Words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. Normally, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order of objects.

[0024] Please see Figure 1 and Figure 3 This embodiment provides an ultrasonic suspended solids sedimentation tank, which includes a sedimentation tank 10, two first diversion plates 4 and two second diversion plates 5 installed in the sedimentation tank 10, and multiple ultrasonic transducers 3 installed on a support net 2.

[0025] Please see Figure 2The support net 2 is installed as follows: a channel steel frame 1 is installed in the middle of the sedimentation tank 10, and the support net 2 is installed on the channel steel frame 1. The support net 2 is made of corrosion-resistant metal. The support net 2 covers the cross-section of the middle part of the sedimentation tank 10, forming a primary buffer settling zone from the middle part to the bottom of the sedimentation tank 10. The channel steel frame 1 includes a horizontal bar 11, a first vertical bar 12, and a second vertical bar 13. The first vertical bar 12 and the second vertical bar 13 divide the sedimentation tank 10 into a first region 21, a second region 22, and a third region 23. The first region 21, the second region 22, and the third region 23 contain the vertical upper and lower space of their respective support nets 2. An inlet 101 and an outlet 102 are respectively provided on the first and second sides of the sedimentation tank 10, and the vertical projections of the inlet 101 and the outlet 102 of the sedimentation tank 10 are located at the two ends of the horizontal bar 11. Two first diversion plates 4 and two second diversion plates 5 are mirror-distributed on both sides of the crossbar 11, with the two second diversion plates 5 positioned between the two first diversion plates 4; that is, the two first diversion plates 4 are located on the outer side, and the two second diversion plates 5 are located on the inner side. The first ends of the two first diversion plates 4 and the two second diversion plates 5 are installed at the inlet 101 and are used to equally divide the water flow at the inlet 101. That is, the first ends of the four diversion plates are all installed in one direction and are used to equally divide the water flow. In this embodiment, the water flow at the inlet 101 is divided into five streams, and these five streams will flow into the first region 21, the second region 22, and the third region 23 of the primary buffer settling zone. Since the first region 21, the second region 22, and the third region 23 are arranged sequentially, the flow velocity of the water in the first region 21, the second region 22, and the third region 23 also varies in a gradient. The water flow velocity is faster near the inlet 101 and slower away from the inlet 101, resulting in different flow velocities. According to the research in this application, for the same water flow, if the energy of the ultrasonic transducer is lower than the normal value, it will lead to insufficient sludge settling. If the energy of the ultrasonic transducer is at the normal value, the sludge settling will be within the ideal range. However, if the energy of the ultrasonic transducer is higher than the normal value, it will still lead to insufficient sludge settling. The reason for this is that if the energy of the ultrasonic transducer is higher than the normal value, the sludge state in the treatment area will quickly go through three stages. The first stage is rapid sludge settling. The second stage is that the sludge has settled to a near-complete settling stage. Then, it quickly enters the third stage, where the settled sludge is agitated again by the energy of the ultrasonic waves, thus making the water turbid again and reducing or even diminishing the effect of accelerated sedimentation. Therefore, in order to solve the existing problem of overuse of ultrasonic waves, the configuration of the ultrasonic transducer needs to be changed. After research and experimentation in this application, a new ultrasonic transducer configuration scheme has been derived: The second ends of the two first diversion plates 4 extend to the first vertical rod 12, and the second ends of the two second diversion plates 5 extend to the second vertical rod 13; the two first diversion plates 4 divide the first region 21 into three first sub-regions, and the two second diversion plates 5 divide the second region 22 into three second sub-regions; A ultrasonic transducers 3 are distributed in each of the two first sub-regions that are in contact with the boundary of the sedimentation tank 10, B ultrasonic transducers 3 are distributed in each of the three second sub-regions, and C ultrasonic transducers 3 are distributed in the third region 23; where 2A > C > A > B. In simple terms, the first region 21, the second region 22, and the third region 23 are further divided into multiple sub-regions based on the areas of the five water flows mentioned above, with the first region 21 divided into three first sub-regions and the second region 22 divided into three second sub-regions. (See reference...) Figure 2 Five water streams flow sequentially from top to bottom. The first and fifth streams are fast-moving streams near the inlet 101. The first and fifth streams pass through most of the first region 21 and a small part of the second region 22. Therefore, the first sub-region has the largest number of ultrasonic transducers 3 for sedimentation treatment. The second, third, and fourth streams are medium-speed streams. The second, third, and fourth streams pass through a small part of the first region 21 and most of the second region 22. Because the flow velocity and impurities are reduced, a moderate number of ultrasonic transducers 3 are set up in the second sub-region for sedimentation treatment. All five streams eventually converge in the third region 23. At this point, both the water quality sludge degree and the flow velocity are at their lowest levels. Therefore, the number of ultrasonic transducers set up in the third region 23 is definitely lower than that in the first region 21. Since it is a confluence region, it is greater than the number of ultrasonic transducers on any single stream path, i.e., 2A > C > A > B.

[0026] In summary, by using different numbers of ultrasonic transducers 3 in the first region 21, the second region 22, and the third region 23, ultrasonic sedimentation is performed on the water flow in different regions. This avoids the reduction in sedimentation efficiency caused by excessive use of ultrasonic waves. To improve the sedimentation effect, this application experimentally determined the optimal distribution of ultrasonic transducers in the first region 21, the second region 22, and the third region 23, as well as along the five water flow paths: A = 3, B = 2, and C = 4. This configuration achieves a simultaneous improvement in sedimentation effect in all regions of the sedimentation tank 10 and a more uniform treatment effect, solving the problem in the prior art where the acceleration effect of suspended solids sedimentation in areas far from the sewage inlet is not obvious, and there may even be a decrease in the sedimentation rate of suspended solids.

[0027] If the structure is optimized, the second ends of the two first diversion plates 4 can be bent and extended to the first vertical rod 12 in a mirror image, and the two first diversion plates 4 can protrude towards the horizontal rod 11. The second ends of the two second diversion plates 5 can be bent and extended to the second vertical rod 13 in a mirror image, and the two second diversion plates 5 can protrude towards the horizontal rod 11. In this way, the water flow rate processed by the first sub-region and the second sub-region will be more reasonable.

[0028] In specific implementation, an ultrasonic generator 31 is installed in the middle of the inner wall of the sedimentation tank 10, away from the inlet 101. The ultrasonic generator 31 is electrically connected to multiple ultrasonic transducers 3, and the multiple ultrasonic transducers 3 are installed in a staggered arrangement between rows. A secondary inclined plate packing settling zone 103 is set in the upper part of the sedimentation tank 10, and an outlet weir 7 is set above the secondary inclined plate packing settling zone 103. The outlet 102 is located on the top side of the sedimentation tank 10 away from the inlet 101. An isolation membrane 9 is set on the inner wall of the sedimentation tank 10. The isolation membrane 9 is used to prevent corrosion of the inner wall of the sedimentation tank 10 and to isolate ultrasonic waves. The isolation membrane 9 is composed of a polyester fiber layer, an ethylene propylene rubber layer, and an asphalt mineral wool layer, with the polyester fiber layer attached to the inner wall of the sedimentation tank 10. According to the gradual change in water quality, the ultrasonic transducers 3 are installed on the support net 2 from dense to sparse in a staggered arrangement from the inlet 101 to the outlet 102. The densely distributed ultrasonic waves at outlet 101 generate strong ultrasonic energy, which, under the influence of cavitation and mechanical action, promotes the rapid coagulation of suspended particles and forms larger flocs near the turbulent inlet, thus achieving rapid settling. Furthermore, the strong ultrasonic vibrations effectively remove blockages caused by impurities at inlet 101. In the primary buffer settling zone near outlet 102, the settling efficiency is relatively stable, and the sparse arrangement reduces interference with existing sediment. Based on this arrangement, the cavitation effect in the quenching water significantly increases the settling rate; suspended solids that would normally require several hours to initially settle achieve a similar settling effect in tens of minutes. This allows the equipment to process more quenching water in the same amount of time, improving the overall efficiency of the treatment process. Inlet 101 and outlet 102 are located at the lower and upper parts of the sedimentation zone on both sides of the secondary inclined plate packing, respectively. Because the inclined plate packing acts as a buffer, the upper effluent zone is evenly distributed, effectively overcoming the uneven water flow caused by the design limitations of inlet 101 and outlet 102. Traditional sedimentation tanks often suffer from uneven horizontal and vertical velocity distribution and dead zones in certain areas. In this design, baffles direct the water flow to areas away from inlet 101. The water flow near the inlet is turbulent and has a small range, making it suitable for densely packed ultrasonic transducers. The water flow in areas away from inlet 101 is gentle and has a large range, which, combined with the relatively sparse arrangement of ultrasonic transducers, ensures precise matching between the equipment configuration and the water flow characteristics. This fully utilizes every space in the tank for sedimentation, preventing some water from flowing out rapidly without sufficient sedimentation. To reduce the impact of ultrasonic waves on personnel in the working environment, the sedimentation tank 10 can be arranged in the order of "asphalt mineral wool layer—ethylene propylene rubber layer—polyester fiber layer" for the following reasons: - The asphalt mineral wool layer is close to the ultrasonic source: Asphalt mineral wool has good sound absorption properties. Its porous structure allows ultrasonic waves to be reflected and scattered multiple times inside, consuming energy. Placing it in the innermost layer can preferentially absorb most of the ultrasonic waves.

[0029] - Transition in the middle layer of ethylene propylene rubber: ethylene propylene rubber has good elasticity, which can effectively buffer ultrasonic vibrations and has a certain degree of sound insulation. Placing it in the middle can further block the remaining ultrasonic waves, reduce their outward propagation intensity, and at the same time reduce fatigue damage to asphalt mineral wool caused by long-term exposure to ultrasonic waves.

[0030] - Polyester fiber layer as outer layer: Polyester fiber has a dense texture, which can block the transmission of ultrasonic waves and protect the internal materials from the influence of the external environment, such as moisture and mechanical damage, thus maintaining the stability of the overall sound insulation structure and better exerting the noise reduction effect.

[0031] To treat the settled sludge, a sludge zone 6 can be set up at the bottom of the sedimentation tank 10. The sludge zone 6 has a sludge outlet for discharging the sludge produced after sedimentation. This allows for rapid sludge collection and treatment, and a pipeline can be installed in the sludge zone 6 to directly discharge the sludge, improving treatment efficiency.

[0032] In summary, this embodiment utilizes different numbers of ultrasonic transducers 3 within the first region 21, second region 22, and third region 23 to perform ultrasonic sedimentation on the water flow in different regions. This avoids reduced sedimentation efficiency due to excessive use of ultrasonic waves. To improve the sedimentation effect, this application experimentally determined the optimal distribution of ultrasonic transducers in the first region 21, second region 22, and third region 23, as well as along the five water flow paths: A = 3, B = 2, and C = 4. This configuration achieves a simultaneous improvement in sedimentation efficiency across all regions of the sedimentation tank 10, resulting in more uniform treatment. It solves the problem in existing ultrasonic sedimentation tanks where the settling velocity of suspended solids is lower in areas far from the inlet than in other areas. By optimizing the structure of the first guide plate 4 and the second guide plate 5, the water flow rates processed in the first and second sub-regions are made more reasonable. A sludge zone 6 can be set at the bottom of the sedimentation tank 10, with a sludge outlet to discharge the sludge generated after sedimentation. This allows for rapid collection and treatment of sludge, and a pipeline can be installed in the sludge zone 6 to directly discharge the sludge, improving treatment efficiency. An isolation membrane 9 is installed to prevent corrosion of the inner wall of the sedimentation tank 10 and to isolate ultrasonic waves, making the device operate more stably.

[0033] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0034] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

Claims

1. An ultrasonic sedimentation tank for suspended solids, characterized in that, include: A sedimentation tank (10) is provided with a channel steel frame (1) installed in the middle of the sedimentation tank (10). A support net (2) is installed on the channel steel frame (1). The channel steel frame (1) includes a horizontal bar (11), a first vertical bar (12) and a second vertical bar (13). The first vertical bar (12) and the second vertical bar (13) divide the sedimentation tank (10) into a first region (21), a second region (22) and a third region (23). The vertical projections of the inlet (101) and outlet (102) of the sedimentation tank (10) are located at the two ends of the horizontal bar (11), respectively. Two first diversion plates (4) and two second diversion plates (5) are installed in the sedimentation tank (10). The two first diversion plates (4) and two second diversion plates (5) are mirror-distributed on both sides of the crossbar (11) and the two second diversion plates (5) are located between the two first diversion plates (4). The first ends of the two first diversion plates (4) and two second diversion plates (5) are installed at the inlet (101) and are used to divide the water flow at the inlet (101) equally. The second ends of the two first diversion plates (4) extend to the first vertical bar (12) and the second ends of the two second diversion plates (5) extend to the second vertical bar (13). The two first diversion plates (4) divide the first area (21) into three first sub-areas and the two second diversion plates (5) divide the second area (22) into three second sub-areas. Multiple ultrasonic transducers (3) are installed on the support net (2). A ultrasonic transducers (3) are distributed in the two first sub-regions that are in contact with the boundary of the sedimentation tank (10), B ultrasonic transducers (3) are distributed in the three second sub-regions, and C ultrasonic transducers (3) are distributed in the third region (23); where 2A>C>A>B.

2. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, A is 3, B is 2, and C is 4.

3. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, The second ends of the two first drainage plates (4) are mirror-bent and extend to the first vertical bar (12), and the two first drainage plates (4) protrude in the direction of the horizontal bar (11). The second ends of the two second drainage plates (5) are mirror-bent and extend to the second vertical bar (13), and the two second drainage plates (5) protrude in the direction of the horizontal bar (11).

4. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, The material of the support mesh (2) is corrosion-resistant metal.

5. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, The support net (2) covers the cross-section of the middle part of the sedimentation tank (10), forming a primary buffer sedimentation zone from the middle part of the sedimentation tank (10) to the bottom.

6. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, An ultrasonic generator (31) is installed in the middle of the inner wall of the sedimentation tank (10) away from the inlet (101). The ultrasonic generator (31) is electrically connected to multiple ultrasonic transducers (3).

7. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, A sludge zone (6) is set at the bottom of the sedimentation tank (10), and a sludge outlet is set in the sludge zone (6) to discharge the sludge generated after sedimentation.

8. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, A secondary inclined plate packing settling zone (103) is set in the upper part of the sedimentation tank (10), and an outlet weir (7) is set above the secondary inclined plate packing settling zone (103). The outlet (102) is set on the top of the sedimentation tank (10) away from the inlet (101).

9. The ultrasonic suspended solids sedimentation tank according to claim 1, characterized in that, An isolation membrane (9) is provided on the inner wall of the sedimentation tank (10). The isolation membrane (9) is used to prevent the inner wall of the sedimentation tank (10) from being corroded and to isolate ultrasonic waves.

10. The ultrasonic suspended solids sedimentation tank according to claim 9, characterized in that, The isolation membrane (9) is composed of a polyester fiber layer, an ethylene propylene rubber layer and an asphalt mineral wool layer, with the polyester fiber layer attached to the inner wall of the sedimentation tank (10).

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