Power plant cooling tower based on condensing folded plate and variable frequency acoustic wave agglomeration water recovery

Abstract

The application discloses a power plant cooling tower based on water recovery of condensing folded plate and variable frequency sound wave agglomeration, which comprises a tower body, a water distribution system, a condensing folded plate system and a sound wave agglomeration system. The condensing folded plate system comprises a condensing folded plate, which defines a cooling medium flow channel and a water vapor flow channel that are isolated from each other and exchange heat with each other. One end of the water vapor flow channel is open downward to form a water vapor inlet. The two ends of the condensing folded plate along a first direction are respectively provided with a condensing inlet and a condensing outlet. The condensing inlet and the condensing outlet are both in communication with the cooling medium flow channel. The condensing inlet is connected with a water inlet pipe, and the condensing outlet is connected with a water outlet pipe. The sound wave agglomeration system is arranged in the tower body and above the condensing folded plate. The sound wave agglomeration system comprises a sound wave horn, which emits sound waves towards the condensing folded plate to agglomerate water vapor. According to the power plant cooling tower based on water recovery of condensing folded plate and variable frequency sound wave agglomeration, efficient water recovery is realized, and the emission of pollutants is reduced.

Description

Technical Field

[0001] This invention relates to the field of energy-saving and environmental protection technology for industrial cooling systems, and in particular to a power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic wave aggregation. Background Technology

[0002] Cooling towers, as critical cooling equipment in the power industry, present significant water resource losses and potential environmental emissions during operation. During the cooling process, some water is carried away by airflow as suspended droplets, resulting in water waste and potentially carrying dissolved salts, microorganisms, and other pollutants, forming "white plumes" that impact the environment and safety. Besides removing a large amount of heat, cooling water also experiences evaporation losses. Data shows that cooling tower makeup water is the largest source of water consumption in thermal power plants, with wet cooling towers accounting for approximately 70% of the cooling water system. The large amount of low-temperature water vapor emitted has a significant environmental impact. Currently, cooling tower drift control mainly relies on mechanical separation devices such as baffles and demisters, but their efficiency in capturing fine droplets is limited and they are prone to clogging. Methods such as spray precooling and chemical mist suppression have problems such as system complexity, high cost, or environmental risks, making it difficult to balance water-saving efficiency and operational stability.

[0003] Acoustic agglomeration technology, as a physical agglomeration method, has shown potential in flue gas treatment. It uses sound fields to cause particles to collide and agglomerate, facilitating subsequent removal. However, in the special environment of cooling towers with high humidity, large air volume, and low temperature differences, acoustic agglomeration technology faces challenges such as low energy efficiency, difficulty in sound field coverage, and insufficient equipment tolerance.

[0004] With increasingly stringent environmental protection requirements, there is a need for an integrated device that can be closely combined with cooling towers and operate stably, so as to efficiently recover water while also effectively controlling mist droplets and pollutants to a certain extent. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to propose a power plant cooling tower for water recovery based on a condensation baffle system and variable frequency acoustic wave agglomeration. The condensation baffle system facilitates heat exchange between condensate and water vapor, enabling rapid condensation of the water vapor and reducing water waste and pollutant emissions caused by water vapor escape. An acoustic wave agglomeration system is installed above the condensation baffle system, using acoustic horns to agglomerate the water vapor, increasing the efficiency of water vapor condensation. By integrating the condensation baffle system and the acoustic wave agglomeration system within the tower body, the two systems are coupled, allowing water vapor to condense into water droplets more quickly, achieving efficient water recovery and reducing pollutant emissions.

[0006] A power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic wave aggregation according to an embodiment of the present invention includes: a tower body; a water distribution system disposed within the tower body, the water distribution system including a water distribution tank, the bottom of the water distribution tank being provided with nozzles; a condensation baffle system including condensation baffles, an inlet pipe, and an outlet pipe, the condensation baffle system being located above the water distribution system, a first connecting port and a second connecting port opposite to each other along a first direction being opened on the side wall of the tower body, the inlet pipe passing through the first connecting port and the outlet pipe passing through the second connecting port, the condensation baffles being located within the tower body, the condensation baffles defining mutual... The cooling medium channel and the water vapor channel are isolated from each other and exchange heat. One end of the water vapor channel is open downward to form a water vapor inlet. The condensing baffle has a condensing inlet and a condensing outlet at both ends along a first direction. The condensing inlet and the condensing outlet are both connected to the cooling medium channel. The condensing inlet is connected to the water inlet pipe, and the condensing outlet is connected to the water outlet pipe. The first direction intersects with the vertical direction. An acoustic agglomeration system is provided inside the tower body and above the condensing baffle. The acoustic agglomeration system includes an acoustic horn that emits acoustic waves toward the condensing baffle to agglomerate the water vapor.

[0007] According to an embodiment of the present invention, a power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration utilizes a condensation baffle system to exchange heat between condensate and water vapor, enabling rapid condensation of water vapor and reducing water waste and pollutant emissions caused by water vapor escape. An acoustic wave agglomeration system is installed above the condensation baffle system, using acoustic horns to agglomerate water vapor, increasing the efficiency of water vapor condensation. By integrating the condensation baffle system and the acoustic wave agglomeration system within the tower body, the two systems are coupled, allowing water vapor to condense into water droplets more quickly, achieving efficient water recovery and reducing pollutant emissions.

[0008] According to some embodiments of the present invention, the condensation baffle includes two flow guiding sections and a plurality of heat exchange sections, the heat exchange sections extending along a first direction, the plurality of heat exchange sections being arranged at intervals along a second direction, and the first direction, the second direction and the up and down direction being intersected. Two flow guides are respectively disposed on both sides of the heat exchange section along the first direction. Each flow guide extends along the second direction and is connected to each heat exchange section. The interior of the flow guide defines a part of the cooling medium flow channel, and the interior of the heat exchange section defines another part of the cooling medium flow channel. The outer walls of two adjacent heat exchange sections and the two flow guides define the water vapor flow channel. One of the flow guides has a condensation inlet at one end along the first direction away from the heat exchange section, and the other flow guide has a condensation outlet at one end along the first direction away from the heat exchange section.

[0009] According to some embodiments of the present invention, each heat exchange section includes a first fold and a second fold arranged in a vertical direction, the first fold and the second fold being disposed at an angle.

[0010] According to some embodiments of the present invention, the angle between the first fold and the vertical direction is β1, and the angle between the second fold and the vertical direction is β2, satisfying 30°≤β1≤45° and 30°≤β2≤45°.

[0011] According to some embodiments of the present invention, the heat exchange section further includes a third fold and a fourth fold, wherein the first fold is located below the second fold, the third fold is located above the second fold and connected to the second fold, the second fold and the third fold are arranged at an angle, and the fourth fold is located above the third fold and connected to the third fold, the third fold and the fourth fold are arranged at an angle.

[0012] According to some embodiments of the present invention, the acoustic wave aggregation system includes a plurality of acoustic horns, at least some of which are arranged at intervals along a first direction, wherein, in the first direction, the acoustic horns closer to the first communication port have a higher frequency of sound emission than the acoustic horns farther from the first communication port. And / or, the acoustic wave agglomeration system includes a plurality of acoustic wave horns, at least some of which are spaced apart along a first direction, and the power plant cooling tower for water recovery based on condensation baffles and frequency conversion acoustic wave agglomeration also includes a controller, which can individually control the sound emission frequency of each of the acoustic wave horns.

[0013] According to some embodiments of the present invention, the acoustic agglomeration system further includes a fixed support extending horizontally and fixedly connected to the inner wall of the tower body, the acoustic horn being fixed to the bottom of the fixed support, and a plurality of the acoustic horns being arranged in a hexagonal array in the horizontal direction.

[0014] According to some embodiments of the present invention, the acoustic wave aggregation system includes a plurality of acoustic wave horn groups, the plurality of acoustic wave horn groups are arranged along a first direction, each acoustic wave horn group includes a plurality of acoustic wave horns, and the acoustic wave horns in a single acoustic wave horn group have the same sound frequency. In the first direction from the first connection port to the second connection port, the sound frequency of the sound horns in different sound horn groups gradually decreases.

[0015] According to some embodiments of the present invention, an elastic vibration isolation element is provided between the acoustic horn and the fixed support; and / or, an elastic vibration isolation element is provided between the fixed support and the inner wall of the tower body.

[0016] According to some embodiments of the present invention, the sound wave horn has a frequency range of 500~1300Hz and a sound pressure level of 130~150dB; and / or, a sound insulation and sound absorption barrier is provided on the outer periphery of the tower body, the distance between the sound insulation and sound absorption barrier and the outer periphery of the cooling tower is 8~12m, and the height of the sound insulation and sound absorption barrier is 8~12m.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a top view of a power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic waves according to some embodiments of the present invention. Figure 2 yes Figure 1 A simplified schematic diagram of a power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic waves; Figure 3 yes Figure 2 A partial structural diagram of the acoustic wave aggregation system in the image; Figure 4 yes Figure 3 A partial structural diagram of the acoustic wave aggregation system in the image; Figure 5 yes Figure 2 A cross-sectional view of the condenser baffle in the middle; Figure 6 yes Figure 5 Another cross-sectional view of the condenser baffle in the image.

[0019] Figure label: 100. Power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic wave aggregation; 1. Tower body; 11. First connecting port; 12. Second connecting port; 13. Water distribution through hole; 2. Water distribution system; 21. Water distribution tank; 22. Nozzle; 23. Water distribution pipe; 3. Condensation baffle system; 31. Water inlet pipe; 32. Water outlet pipe; 33. Condensation baffle; 331. Cooling medium flow channel; 332. Condensation inlet; 333. Condensation outlet; 334. Water vapor flow channel; 335. Water vapor inlet; 336. Flow guide; 337. Heat exchange section; 341. First fold; 342. Second fold; 343. Third fold; 344. Fourth fold; 4. Acoustic wave aggregation system; 41. Acoustic wave horn assembly; 42. Acoustic wave horn; 43. Mounting bracket; 44. Compression driver; 45. Power amplifier; 46. Signal generator; 47. Waterproof partition; 51. Water tank; 52. Filler; 53. Water separator; 54. Sound insulation and sound absorption barrier. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The following is for reference. Figures 1-6 A power plant cooling tower 100 based on condensation baffles and variable frequency acoustic wave agglomeration for water recovery according to an embodiment of the present invention is described.

[0022] Reference Figure 2 According to an embodiment of the present invention, a power plant cooling tower 100 based on condensation baffles and variable frequency acoustic wave agglomeration for water recovery includes: a tower body 1, a water distribution system 2, a condensation baffle system 3, and an acoustic wave agglomeration system 4.

[0023] The water distribution system 2 is located inside the tower body 1. The water distribution system 2 includes a water distribution tank 21, and a nozzle 22 is provided at the bottom of the water distribution tank 21.

[0024] The condensing baffle system 3 includes a condensing baffle 33, an inlet pipe 31, and an outlet pipe 32. The condensing baffle system 3 is located above the water distribution system 2. The side wall of the tower body 1 has a first connecting port 11 and a second connecting port 12 that are opposite each other in the first direction. The inlet pipe 31 passes through the first connecting port 11 and the outlet pipe 32 passes through the second connecting port 12. The condensing baffle 33 is located inside the tower body 1. The condensing baffle 33 defines a cooling medium flow channel 331 and a water vapor flow channel 334 that are isolated from each other and exchange heat with each other. One end of the water vapor flow channel 334 is open downward to form a water vapor inlet 335. The two ends of the condensing baffle 33 in the first direction are respectively provided with a condensing inlet 332 and a condensing outlet 333. The condensing inlet 332 and the condensing outlet 333 are both connected to the cooling medium flow channel 331. The condensing inlet 332 is connected to the inlet pipe 31, and the condensing outlet 333 is connected to the outlet pipe 32. The first direction is intersecting with the vertical direction.

[0025] The acoustic agglomeration system 4 is located inside the tower body 1 and above the condensation baffle 33. The acoustic agglomeration system 4 includes an acoustic horn 42, which emits acoustic waves toward the condensation baffle 33 to agglomerate water vapor.

[0026] For example, in a thermal power generation system, after steam performs work in the turbine, it enters the condenser and is condensed by cooling water. After heat exchange, the temperature of the cooling water rises, and it needs to be sent to the cooling tower to cool down before it can be recycled and used to condense steam again.

[0027] For example, the water distribution system 2 also includes a water distribution pipe 23. A water distribution through hole 13 is provided on the side wall of the tower body 1. The water distribution pipe 23 passes through the water distribution through hole 13 and passes water into the water distribution tank 21.

[0028] For example, a water tank 51 is also provided inside the cooling tower, and the water tank 51 is located at the bottom of the cooling tower.

[0029] For example, the cooling tower is also equipped with packing material 52, which is located below the condensation baffle system 3 and above the water tank 51. The packing material 52 can disperse the flow of condensate, increase the contact area between water and air and prolong the contact time, so that the water is fully cooled by the flowing air as it flows down, thereby achieving efficient heat dissipation.

[0030] For example, a water separator 53 is also provided inside the cooling tower. The water separator 53 is located above the acoustic agglomeration system 4 and is used to further remove droplets from the upward-rising water vapor.

[0031] When the cooling tower is working, relevant personnel introduce cooling medium through the inlet pipe 31, so that the cooling medium cools the humid hot water vapor. The cooled medium after heat exchange is discharged from the outlet pipe 32. The cooling medium can be water.

[0032] After the cooling water is sprayed downward from the nozzle 22 at the bottom of the water distribution tank 21, it comes into contact with the rising air inside the tower for heat exchange. Part of the cooling water falls downward into the water pool 51 at the bottom of the tower under its own gravity and is collected and recycled. The other part of the cooling water mixes with the air to form water vapor carrying fine water droplets. Then, this water vapor changes direction and rises upward under the action of the rising air. The water vapor enters the water vapor flow channel 334 defined by the condensation baffle 33 from the water vapor inlet 335 that opens downward.

[0033] The hot, humid water vapor first passes through the water vapor flow channel 334 in the condensing baffle 33, where it exchanges heat with the cooling medium in the cooling medium flow channel 331, causing the water vapor temperature to decrease. Part of the water vapor condenses on the side wall of the water vapor flow channel 334 to form water droplets, which then fall downwards into the water pool 51 at the bottom of the tower under their own gravity. The other part of the water vapor is affected by the sound wave agglomeration system 4 located above. The sound wave horn 42 emits sound waves towards the condensing baffle 33, causing the water vapor in the water vapor flow channel 334 to agglomerate into water droplets. The agglomerated water droplets then fall downwards into the water pool 51 at the bottom of the tower under their own gravity.

[0034] The condensation baffle system 3 facilitates heat exchange between condensate and water vapor, enabling rapid condensation and reducing water waste caused by vapor escape. Above the condensation baffle system 3, an acoustic agglomeration system 4 uses an acoustic horn 42 to agglomerate the water vapor, increasing condensation efficiency and further minimizing water waste. Furthermore, since water vapor contains pollutants, faster agglomeration and collection in the water tank 51 reduce environmental pollution caused by pollutants being released with the water vapor.

[0035] By integrating the condensation baffle system 3 and the acoustic agglomeration system 4 into the tower body 1, the condensation baffle system 3 and the acoustic agglomeration system 4 are coupled, enabling water vapor to condense into water droplets more quickly, achieving efficient water recovery and reducing pollutant emissions.

[0036] Some of the moisture is condensed and recovered; then it enters the sound wave aggregation zone, where residual droplets and pollutants aggregate and settle under the action of sound waves, further improving water conservation and purification effects.

[0037] According to an embodiment of the present invention, a power plant cooling tower 100 based on condensation baffles and variable frequency acoustic wave agglomeration for water recovery uses a condensation baffle system 3 to exchange heat between condensate and water vapor, enabling rapid condensation of water vapor and reducing water waste and pollutant emissions caused by water vapor escape. An acoustic wave agglomeration system 4 is installed above the condensation baffle system 3, using an acoustic horn 42 to emit sound to agglomerate the water vapor, increasing the efficiency of water vapor condensation. By integrating the condensation baffle system 3 and the acoustic wave agglomeration system 4 within the tower body 1, the two systems are coupled, allowing water vapor to condense into water droplets more quickly, achieving efficient water recovery and reducing pollutant emissions.

[0038] Reference Figure 2 , Figure 5 and Figure 6 According to some embodiments of the present invention, the condensing baffle 33 includes two flow guides 336 and a plurality of heat exchange sections 337. The heat exchange sections 337 extend along a first direction, and the plurality of heat exchange sections 337 are arranged at intervals along a second direction. The first direction, the second direction, and the up-down direction intersect each other. The two flow guides 336 are respectively disposed on both sides of the heat exchange sections 337 along the first direction. Each flow guide 336 extends along the second direction and is connected to each heat exchange section 337. The interior of the flow guide 336 defines a portion of the cooling medium flow channel 331, and the interior of the heat exchange section 337 defines another portion of the cooling medium flow channel 331. A water vapor flow channel 334 is defined between the outer walls of two adjacent heat exchange sections 337 and the two flow guides 336. One of the flow guides 336 has a condensing inlet 332 at one end along the first direction away from the heat exchange section 337, and the other flow guide 336 has a condensing outlet 333 at one end along the first direction away from the heat exchange section 337.

[0039] The cooling medium is introduced from the water inlet pipe 31 and enters the cooling medium flow channel 331 through the condensation inlet 332 on one side of the guide section 336. The cooling medium first passes through the flow channel inside the guide section 336 and is diverted by the guide section 336 to multiple heat exchange sections 337 arranged at intervals along the second direction. During the flow along the first direction of the heat exchange section 337, the cooling medium indirectly exchanges heat with the water vapor in the water vapor flow channel 334 through the outer wall of the heat exchange section 337 and absorbs heat. The heated cooling medium flows into the flow channel inside the guide section 336 on the other side and flows into the water outlet pipe 32 through the condensation outlet 333 on the guide section 336, and is finally discharged.

[0040] Water vapor enters the water vapor channel 334 from the bottom of the condensing baffle 33. The water vapor exchanges heat with the cooling medium, causing its temperature to drop. The water vapor condenses into condensate on the outer wall of the heat exchange section 337, and then falls downwards under its own gravity, eventually being collected in the water pool 51. The gas flows upwards and exits the water vapor channel 334 from the top of the condensing side. This avoids water waste caused by water vapor escape and also reduces the emission of pollutants carried by water vapor.

[0041] By including two guide sections 336 in the condensing baffle 33, the guide sections 336 can guide the cooling medium to flow evenly and smoothly in the initial stage of the cooling medium entering the cooling medium flow channel 331, so that the cooling medium can be more evenly distributed into the flow channels in multiple heat exchange sections 337. This avoids local flow velocity imbalance or vortex formation of the cooling medium, and avoids the situation where some flow channels in the condensing baffle 33 lack cooling medium while others have excessive flow, resulting in uneven heat exchange.

[0042] Reference Figure 2 , Figure 5 and Figure 6 According to some embodiments of the present invention, each heat exchange section 337 includes a first fold 41 and a second fold 342 arranged in a vertical direction, the first fold 41 and the second fold 342 being arranged at an angle.

[0043] By setting the first bend 41 and the second bend 342 at an angle, the water vapor flow channel 334 becomes a zigzag shape. This allows water vapor to more easily collide with the sidewall of the heat exchange section 337 as it flows through the channel. This also makes it easier for tiny water droplets in the water vapor to collide with and adhere to the sidewall of the heat exchange section 337, and for water vapor to condense more easily on the sidewall, thus reducing water vapor escape. Furthermore, increasing the length of the water vapor flow channel 334 increases the heat exchange time between the water vapor and the cooling medium, thereby improving the heat exchange effect.

[0044] Reference Figure 2 , Figure 5 and Figure 6According to some embodiments of the present invention, the angle between the first fold 41 and the vertical direction is β1, and the angle between the second fold 342 and the vertical direction is β2, satisfying 30°≤β1≤45° and 30°≤β2≤45°.

[0045] For example, the angle β1 between the first fold 41 and the vertical direction can be 30°, 35°, 40°, 45°, etc. The angle β2 between the second fold 342 and the vertical direction can be 30°, 35°, 40°, 45°, etc.

[0046] By ensuring that the angle β1 between the first bend 41 and the vertical direction is not less than 30°, the tilt angle of the first bend 41 can be made more sufficient, allowing water vapor to more easily collide with the sidewall of the first bend 41 when flowing in the water vapor channel 334, thus further reducing water vapor escape. By ensuring that the angle β1 between the first bend 41 and the vertical direction is not greater than 45°, the difficulty in manufacturing the heat exchange section 337 due to an excessively large tilt angle of the first bend 41 can be avoided.

[0047] By ensuring that the angle β2 between the second bend 342 and the vertical direction is not less than 30°, the tilt angle of the second bend 342 can be made more sufficient, allowing water vapor to more easily collide with the sidewall of the first bend 41 when flowing in the water vapor channel 334, thus further reducing water vapor escape. By ensuring that the angle β2 between the second bend 342 and the vertical direction is not greater than 45°, the difficulty in manufacturing the heat exchange section 337 due to an excessively large tilt angle of the second bend 342 can be avoided.

[0048] Reference Figure 2 , Figure 5 and Figure 6 According to some embodiments of the present invention, the heat exchange section 337 further includes a third fold 343 and a fourth fold 344. The first fold 41 is located below the second fold 342, the third fold 343 is located above the second fold 342 and connected to the second fold 342, and the second fold 342 and the third fold 343 are arranged at an angle. The fourth fold 344 is located above the third fold 343 and connected to the third fold 343, and the third fold 343 and the fourth fold 344 are arranged at an angle.

[0049] By including a third bend 343 and a fourth bend 344 in the heat exchange section 337, and by setting the second bend 342 and the third bend 343 at an angle, and the third bend 343 and the fourth bend 344 at an angle, water vapor can more easily collide with the sidewall of the heat exchange section 337 when flowing in the water vapor channel 334. This makes it easier for fine water droplets in the water vapor to collide with and adhere to the sidewall of the heat exchange section 337, and also makes it easier for water vapor to condense on the sidewall of the heat exchange section 337 to form condensate, thus more effectively reducing water vapor escape. Furthermore, the length of the water vapor channel 334 can be further increased to increase the heat exchange time between water vapor and the cooling medium, thereby improving the heat exchange effect.

[0050] Reference Figures 2-4 According to some embodiments of the present invention, the acoustic wave aggregation system 4 includes a plurality of acoustic wave horns 42, at least some of which are arranged at intervals along a first direction. In the first direction, the acoustic wave horns 42 closer to the first communication port 11 emit a higher frequency than the acoustic wave horns 42 farther from the first communication port 11.

[0051] The heat exchange medium flows along the first direction. The heat exchange medium closer to the first connection port 11 has a shorter heat exchange time and a lower temperature, while the heat exchange medium farther from the first connection port 11 has a longer heat exchange time and a higher temperature. This results in the water vapor near the first connection port 11 having a lower temperature and being more prone to condensation. Consequently, the tiny droplets in the water vapor leaving the water vapor channel 334 and escaping upwards have a smaller diameter. On the other hand, the water vapor farther from the first connection port 11 has a higher temperature and is less prone to condensation. Consequently, the tiny droplets in the water vapor leaving the water vapor channel 334 and escaping upwards have a larger diameter.

[0052] By ensuring that the sound wave horn 42 emitting frequency closer to the first connection port 11 is higher than that emitting frequency farther from the first connection port 11 in the first direction, the sound wave horn 42 emitting frequency can be matched with the size of the upward-escaping water vapor particles. The sound wave horn group 41 on the side closer to the first connection port 11 uses a higher operating frequency to effectively agglomerate small-diameter droplets in that region; the sound wave horn group 41 in the middle region uses a medium operating frequency; and the sound wave horn group 41 on the side farther from the first connection port 11 uses a lower operating frequency to promote further agglomeration of larger-diameter droplets. Through this frequency conversion design, the sound wave energy can be better matched to the particle size characteristics of droplets in each region, thereby improving the overall agglomeration efficiency, further reducing water vapor emissions, and increasing the water recovery rate.

[0053] Reference Figures 2-4According to some embodiments of the present invention, the acoustic wave agglomeration system 4 includes a plurality of acoustic wave horns 42, at least some of which are arranged at intervals along a first direction. The power plant cooling tower 100 for water recovery based on condensation baffles and frequency conversion acoustic wave agglomeration also includes a controller that can individually control the sound emission frequency of each acoustic wave horn 42.

[0054] The heat exchange medium flows along the first direction. The heat exchange medium closer to the first connection port 11 has a shorter heat exchange time and a lower temperature, while the heat exchange medium farther from the first connection port 11 has a longer heat exchange time and a higher temperature. This results in the water vapor near the first connection port 11 having a lower temperature and being more prone to condensation. Consequently, the tiny droplets in the water vapor leaving the water vapor channel 334 and escaping upwards have a smaller diameter. On the other hand, the water vapor farther from the first connection port 11 has a higher temperature and is less prone to condensation. Consequently, the tiny droplets in the water vapor leaving the water vapor channel 334 and escaping upwards have a larger diameter.

[0055] By arranging at least some of the acoustic horns 42 at intervals along a first direction, and enabling the controller to individually control the emission frequency of each acoustic horn 42, the emission frequency of acoustic horns 42 at different positions along the first direction can be individually controlled. For example, the acoustic horn group 41 near the first connection port 11 uses a higher operating frequency to effectively agglomerate small-diameter droplets in that area; the acoustic horn group 41 in the middle area uses a medium operating frequency; and the acoustic horn group 41 away from the first connection port 11 uses a lower operating frequency to promote further agglomeration of larger-diameter droplets. Through this frequency conversion design, the acoustic energy can be better matched to the droplet size characteristics of each area, thereby improving the overall agglomeration efficiency, further reducing water vapor emissions, and increasing the water recovery rate.

[0056] For example, the acoustic agglomeration system 4 also includes a sensor located on top of the acoustic agglomeration system 4. The sensor detects the humidity of the environment, and the controller can adjust the acoustic parameters according to the parameters fed back by the sensor to achieve adaptive operation, thereby improving the overall agglomeration efficiency and further reducing droplet emissions.

[0057] Reference Figures 2-4 According to some embodiments of the present invention, the acoustic wave aggregation system 4 further includes a fixed support 43, which extends horizontally and is fixedly connected to the inner wall of the tower body 1. Acoustic wave horns 42 are fixed to the bottom of the fixed support 43, and a plurality of acoustic wave horns 42 are arranged in a hexagonal array in the horizontal direction.

[0058] By arranging multiple sound wave horns 42 in a hexagonal array in the horizontal direction, this arrangement has a larger coverage area, fewer dead zones, higher coverage efficiency, and a more uniform sound field distribution compared to other arrangements with the same spacing.

[0059] According to some embodiments of the present invention, the acoustic wave aggregation system 4 further includes a compression driver 44, a power amplifier 45, a signal generator 46, and a waterproof partition 47. The signal generator 46 is used to generate an acoustic wave signal of a specific frequency, the power amplifier 45 is used to amplify the signal, and the compression driver 44 is used to drive the acoustic horn 42 to emit sound. The waterproof partition 47 is fixedly connected to the mounting bracket 43, and the signal generator 46 and the power amplifier 45 are installed inside the waterproof partition 47.

[0060] Reference Figures 2-4 According to some embodiments of the present invention, the sound wave agglomeration system 4 includes a plurality of sound wave horn groups 41, which are arranged along a first direction. Each sound wave horn group 41 includes a plurality of sound wave horns 42. The sound waves horns 42 in a single sound wave horn group 41 have the same sound frequency. In the first direction from the first connecting port 11 to the second connecting port 12, the sound frequency of the sound waves horns 42 in different sound wave horn groups 41 gradually decreases.

[0061] By including multiple sound wave horn groups 41 in the sound wave aggregation system 4, and making the sound wave horns 42 of different sound wave horn groups 41 emit different frequencies, it is convenient to control the sound wave horns 42.

[0062] By gradually decreasing the emission frequency of the acoustic horns 42 in different acoustic horn groups 41 along the first direction from the first connection port 11 to the second connection port 12, the acoustic horn groups 41 closer to the first connection port 11 operate at a higher frequency to effectively agglomerate small-diameter droplets in that region; the acoustic horn groups 41 in the middle region operate at a medium frequency; and the acoustic horn groups 41 farther from the first connection port 11 operate at a lower frequency to promote further agglomeration of larger-diameter droplets. Through this frequency conversion design, the acoustic energy can be better matched to the droplet size characteristics of each region, thereby improving the overall agglomeration efficiency, further reducing water vapor emissions, and increasing the water recovery rate.

[0063] According to some embodiments of the present invention, an elastic vibration isolation element is provided between the acoustic horn 42 and the fixed bracket 43.

[0064] By providing an elastic vibration isolation element between the sound wave horn 42 and the fixed support 43, the elastic vibration isolation element can absorb the energy brought by the sound wave horn 42, and prevent the sound wave horn 42 from causing the fixed support 43 to vibrate, thus preventing the tower body 1 from vibrating.

[0065] According to some embodiments of the present invention, an elastic vibration isolation element is provided between the fixed bracket 43 and the inner wall of the tower body 1.

[0066] By providing an elastic vibration isolation element between the fixed support 43 and the tower body 1, the elastic vibration isolation element can absorb the vibration energy brought by the sound wave horn 42, further preventing the sound wave horn 42 from causing the fixed support 43 to vibrate and thus causing the tower body 1 to vibrate.

[0067] According to some embodiments of the present invention, the sound horn 42 has a frequency range of 500~1300Hz and a sound pressure level of 130~150dB.

[0068] By setting the frequency range of the acoustic horn 42 to 500~1300Hz and the sound pressure level to 130~150dB, the acoustic horn 42 can perform acoustic agglomeration on water droplets of the corresponding particle size, thereby improving agglomeration efficiency, further reducing water vapor emissions, and increasing water recovery rate.

[0069] Reference Figure 1 According to some embodiments of the present invention, a sound insulation and sound absorption barrier 54 is provided on the outer periphery of the tower body 1, the distance between the sound insulation and sound absorption barrier 54 and the outer periphery of the cooling tower is 8~12m, and the height of the sound insulation and sound absorption barrier 54 is 8~12m.

[0070] For example, the main structure of the sound insulation and sound absorption barrier 54 is a transparent PC board sound insulation panel, which is fixed to a steel frame with stainless steel bolts. The sound insulation and sound absorption barrier 54 is equipped with a sound-absorbing structure: an outer color steel sandwich panel, an inner louvered sound-absorbing panel, and is filled with moisture-proof centrifugal glass wool sound-absorbing material. A cylindrical sound absorber is installed at the top. This design effectively isolates and absorbs noise while largely not affecting airflow.

[0071] The following reference Figures 1-6 A power plant cooling tower 100 based on water recovery using condensation baffles and variable frequency acoustic waves, according to some embodiments of the present invention, is described.

[0072] In this embodiment, the cooling tower is a cooling tower for a thermal power unit.

[0073] The natural draft cooling tower of a 150MW thermal power unit is 85m high, with an air inlet height of 4.5m and an air volume of 6,222,163 m³ / h. 3At a rate of / h, air exchanges heat with hot water sprayed from nozzle 22 within the packing 52. The air, carrying water droplets, forms water vapor that continues to rise. This water vapor enters the condensing baffle 33 and exchanges heat with the cooling medium in the cooling medium channel 331 within the water vapor flow channel 334, causing condensation. The condensing baffle 33 is 1.5m high and arranged in a length × width = 40m × 40m configuration. The spacing between adjacent heat exchange sections 337 is 30mm. Each heat exchange section 337 has a width of 40mm along the second direction, and its internal water flow channel has a width of 30mm in the second direction. There are approximately 572 heat exchange sections 337 in total. Each heat exchange section 337 includes a first fold 41, a second fold 342, a third fold 343, and a fourth fold 344. Each fold has an angle of 30° with the vertical direction. The heat exchange medium within the condensing baffle 33 is 5°C cold water with a flow rate of 11000 m³ / h. 3 / h. The condensation efficiency of water vapor after passing through the condenser plate reaches over 65.36%.

[0074] Subsequently, the water vapor enters the sound wave aggregation section. The sound wave horns 42 are arranged in a hexagonal array in a honeycomb pattern, with a spacing of 5m between two adjacent sound wave horns 42 and a sound pressure level of 140dB. Multiple sound wave horns 42 arranged at intervals along the second direction form a sound wave horn group 41. The sound wave frequency emitted by the sound wave horn group 41 closest to the water inlet pipe 31 is set at 1300Hz, and the sound wave frequency emitted by the sound wave horn group 41 closest to the water outlet pipe 32 is set at 500Hz. The sound wave frequency difference between two adjacent sound wave horn groups 42 is 100Hz. The water vapor flows through the sound wave aggregation section for about 5s, which allows the small droplets in the water vapor to fully experience the periodic oscillation of the sound waves in the sound field, while avoiding the negative effects caused by excessive time.

[0075] After being acted upon by sound waves, the small droplets in the gas collide with each other and form larger droplets. Some droplets fall downwards under their own gravity, while others are intercepted and recovered by the water separator 53. The water recovery rate after system treatment can reach over 75%, while the emission of soluble salts and particulate matter is correspondingly reduced. Furthermore, sound-absorbing barriers 54 are installed around the main body of the tower 1, 10m above the bottom of the cooling tower, effectively reducing noise.

[0076] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0077] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0078] In the description of this invention, "a plurality of" means two or more.

[0079] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0080] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of the invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration, characterized in that, include: Tower body; A water distribution system is provided inside the tower body. The water distribution system includes a water distribution tank, and nozzles are provided at the bottom of the water distribution tank. A condensing baffle system includes a condensing baffle, an inlet pipe, and an outlet pipe. The condensing baffle system is located above the water distribution system. A first connecting port and a second connecting port opposite each other in a first direction are opened on the side wall of the tower body. The inlet pipe passes through the first connecting port and the outlet pipe passes through the second connecting port. The condensing baffle is located inside the tower body. The condensing baffle defines a cooling medium flow channel and a water vapor flow channel that are isolated from each other but exchange heat with each other. One end of the water vapor flow channel is open downward to form a water vapor inlet. The condensing baffle has a condensing inlet and a condensing outlet at both ends in the first direction, respectively. The condensing inlet and the condensing outlet are both connected to the cooling medium flow channel. The condensing inlet is connected to the inlet pipe, and the condensing outlet is connected to the outlet pipe. The first direction intersects with the vertical direction. An acoustic agglomeration system is provided inside the tower body and above the condensation baffle. The acoustic agglomeration system includes an acoustic horn that emits acoustic waves toward the condensation baffle to agglomerate water vapor.

2. The power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic wave agglomeration as described in claim 1, characterized in that, The condensing baffle includes two flow guiding sections and multiple heat exchange sections. The heat exchange sections extend along a first direction, and the multiple heat exchange sections are arranged at intervals along a second direction. The first direction, the second direction, and the up and down direction intersect each other. Two flow guides are respectively disposed on both sides of the heat exchange section along the first direction. Each flow guide extends along the second direction and is connected to each heat exchange section. The interior of the flow guide defines a part of the cooling medium flow channel, and the interior of the heat exchange section defines another part of the cooling medium flow channel. The outer walls of two adjacent heat exchange sections and the two flow guides define the water vapor flow channel. One of the flow guides has a condensation inlet at one end along the first direction away from the heat exchange section, and the other flow guide has a condensation outlet at one end along the first direction away from the heat exchange section.

3. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 2, characterized in that, Each heat exchange section includes a first fold and a second fold arranged in a vertical direction, with the first fold and the second fold being set at an angle.

4. The power plant cooling tower based on water recovery using condensation baffles and variable frequency acoustic wave agglomeration as described in claim 3, characterized in that, The angle between the first fold and the vertical direction is β1, and the angle between the second fold and the vertical direction is β2, satisfying 30°≤β1≤45° and 30°≤β2≤45°.

5. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 3, characterized in that, The heat exchange section further includes a third fold and a fourth fold. The first fold is located below the second fold, the third fold is located above the second fold and connected to the second fold, and the second fold and the third fold are arranged at an angle. The fourth fold is located above the third fold and connected to the third fold, and the third fold and the fourth fold are arranged at an angle.

6. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 1, characterized in that, The acoustic wave aggregation system includes multiple acoustic horns, at least some of which are arranged at intervals along a first direction. In the first direction, the acoustic horns closer to the first connection port have a higher frequency of sound emission than the acoustic horns farther from the first connection port. And / or, the acoustic wave agglomeration system includes a plurality of acoustic wave horns, at least some of which are spaced apart along a first direction, and the power plant cooling tower for water recovery based on condensation baffles and frequency conversion acoustic wave agglomeration also includes a controller, which can individually control the sound emission frequency of each of the acoustic wave horns.

7. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 1, characterized in that, The acoustic wave aggregation system also includes a fixed support, which extends horizontally and is fixedly connected to the inner wall of the tower body. The acoustic wave horn is fixed at the bottom of the fixed support, and multiple acoustic wave horns are arranged in a hexagonal array in the horizontal direction.

8. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 7, characterized in that, The sound wave aggregation system includes multiple sound wave horn groups, which are arranged along a first direction. Each sound wave horn group includes multiple sound wave horns, and the sound waves of the multiple sound wave horns in a single sound wave horn group have the same sound frequency. In the first direction from the first connection port to the second connection port, the sound frequency of the sound horns in different sound horn groups gradually decreases.

9. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 7, characterized in that, An elastic vibration isolation element is provided between the acoustic horn and the fixed support; and / or, an elastic vibration isolation element is provided between the fixed support and the inner wall of the tower body.

10. The power plant cooling tower for water recovery based on condensation baffles and variable frequency acoustic wave agglomeration according to claim 1, characterized in that, The sound wave horn has a frequency range of 500~1300Hz and a sound pressure level of 130~150dB; and / or, a sound insulation and sound absorption barrier is provided on the outer periphery of the tower body, the distance between the sound insulation and sound absorption barrier and the outer periphery of the cooling tower is 8~12m, and the height of the sound insulation and sound absorption barrier is 8~12m.

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