Circulating water filtering device for thermal power plant

Abstract

The present application relates to the technical field of filtration, and specifically discloses a circulating water filtering device for a thermal power plant. The device comprises a first filtering assembly, a second filtering assembly and an anti-scale assembly which are sequentially connected along the water flow direction. The first filtering assembly comprises a first shell, a flow equalizing assembly and a first filtering unit which are sequentially arranged inside the first shell along the water flow direction. The second filtering assembly comprises a second shell and a second filtering unit which is detachably installed inside the second shell. The filtering precision of the first filtering unit is less than that of the second filtering unit. The anti-scale assembly comprises an inner pipeline through which the water flows, and a plurality of magnetic units arranged on the outer side of the inner pipeline. The magnetic units are used to inhibit the formation of scale. The device further comprises a turbulence assembly which is located downstream of the inner pipeline. The turbulence assembly is internally provided with a baffle structure to make the water form turbulent flow. The circulating water filtering device for a thermal power plant according to the present application can realize multi-stage filtration of circulating water and inhibit the formation of scale.

Description

Technical Field

[0001] This invention belongs to the field of filtration technology, specifically relating to a circulating water filtration device for thermal power plants. Background Technology

[0002] The circulating water system in a power plant provides the cooling medium for core heat exchange equipment such as condensers, and is crucial for the stable operation of the unit. Long-term use of circulating water can lead to the accumulation of solid impurities such as silt and suspended particles, which can easily cause pipe blockages and equipment erosion and wear. Simultaneously, calcium and magnesium ions in the water can easily precipitate to form dense scale, reducing heat exchange efficiency and shortening equipment lifespan. It is difficult to simultaneously achieve efficient filtration and scale prevention and removal in related technologies. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a circulating water filtration device for thermal power plants, which achieves multi-stage filtration of circulating water while simultaneously inhibiting scale formation.

[0004] The circulating water filtration device for thermal power plants according to an embodiment of the present invention includes a first filtration component, a second filtration component, and an anti-scaling component connected sequentially along the water flow direction. The first filtration component includes a first housing, a flow equalization component and a first filtration unit disposed inside the first housing and arranged sequentially along the water flow direction. The second filtration component includes a second housing and a second filtration unit detachably installed inside the second housing, wherein the filtration accuracy of the first filtration unit is less than that of the second filtration unit. The anti-scaling component includes an inner pipe for water flow and a plurality of magnetic units disposed on the outer side of the inner pipe, the magnetic units being used to inhibit scale formation. It also includes a flow turbulence component located downstream of the inner pipe, the flow turbulence component having a baffle structure inside to create turbulent flow in the water.

[0005] The circulating water filtration device for thermal power plants in this embodiment of the invention forms a gradient filtration through first and second filtration components, which selectively traps impurities of different particle sizes. A magnetic unit is used to alter the crystallization morphology of scale-forming ions, inhibiting scale formation. Downstream turbulence components generate turbulent flow to flush the inner walls of subsequent pipes, reducing the adhesion of loose crystals. The overall structure is simple and effectively solves the problems of impurity clogging and scale deposition in circulating water.

[0006] In some embodiments, the flow equalization component includes a plate having a plurality of through holes.

[0007] In some embodiments, the first filtration unit includes a plurality of first filter plates arranged sequentially along the water flow direction, the pore size of the plurality of first filter plates decreases along the water flow direction, and a gap is provided between two adjacent first filter plates.

[0008] In some embodiments, the second filtration unit includes a plurality of second filter plates arranged sequentially along the water flow direction, wherein the pore size of the second filter plates is smaller than the pore size of the first filter plate located at the downstream end.

[0009] In some embodiments, the anti-scaling assembly further includes a magnetic shielding strip and an outer pipe. The magnetic shielding strip covers the outside of the plurality of magnetic units, and the outer pipe is sleeved on the outside of the magnetic shielding strip and is coaxially arranged with the inner pipe.

[0010] In some embodiments, the flow-disrupting component includes an outer shell that is connected to the outlet end of the inner pipe. The flow-deflecting structure is disposed inside the outer shell and includes a plurality of flow-deflecting plates stacked in a direction perpendicular to the water flow, with a meandering flow-deflecting channel formed between two adjacent flow-deflecting plates.

[0011] In some embodiments, the flow-disrupting component further includes a flow-guiding component, which is a tapered tube structure. The inner diameter of the tapered tube structure narrows along the water flow direction. The inlet end of the tapered tube structure is connected to the outlet end of the inner pipe, and the outlet end of the tapered tube structure is located upstream of the baffle structure.

[0012] In some embodiments, the turbulence assembly further includes a flushing pipe and a drain outlet located at the bottom of the housing. At least a portion of the flushing pipe is located inside the housing, and a plurality of flushing holes are provided on the pipe wall of the flushing pipe, the flushing holes corresponding to the baffle structure.

[0013] In some embodiments, the first housing and the second housing are in sealed communication, and the water outlet of the second housing is in sealed communication with the water inlet of the inner pipe.

[0014] In some embodiments, the circulating water filtration device for thermal power plants further includes a top cover, which is detachably connected to the water inlet end of the first housing, and the top cover is provided with a water inlet communicating with the interior of the first housing. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the present invention.

[0016] Figure 2 This is a structural diagram of the first filter component of the present invention.

[0017] Figure 3 This is a structural diagram of the second filter component of the present invention.

[0018] Figure 4 This is a structural diagram of the anti-scaling component of the present invention.

[0019] Figure 5 This is a structural diagram of the baffle structure of the present invention.

[0020] Figure label:

[0021] 1. First filter assembly; 11. First housing; 12. Flow equalization assembly; 13. First filter unit; 2. Second filter assembly; 21. Second housing; 22. Second filter unit; 3. Anti-scaling components; 31. Inner pipe; 32. Magnetic unit; 33. Magnetic shielding strip; 34. Outer pipe; 4. Aerodynamic components; 41. Outer shell; 42. Deflector structure; 43. Aerodynamic guide components; 5. Top cover. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1-5 As shown, the circulating water filtration device for thermal power plants according to an embodiment of the present invention includes a first filtration component 1, a second filtration component 2, and an anti-scaling component 3 connected sequentially along the water flow direction. The first filtration component 1 includes a first housing 11, a flow equalization component 12 disposed inside the first housing 11 and arranged sequentially along the water flow direction, and a first filtration unit 13. The second filtration component 2 includes a second housing 21 and a second filtration unit 22 detachably installed inside the second housing 21, wherein the filtration accuracy of the first filtration unit 13 is less than that of the second filtration unit 22. The anti-scaling component 3 includes an inner pipe 31 for water flow and a plurality of magnetic units 32 disposed on the outer side of the inner pipe 31. The magnetic units 32 are used to inhibit scale formation. It also includes a flow turbulence component 4, which is located downstream of the inner pipe 31. The flow turbulence component 4 has a baffle structure 42 inside to make the water form turbulence.

[0024] The circulating water filtration device for thermal power plants in this embodiment achieves graded interception of impurities of different particle sizes through a gradient filtration structure, reducing the operating load of subsequent filtration units. At the same time, it uses the magnetic field to change the crystal morphology of scale-forming ions, inhibiting the formation of dense scale, and enhances water turbulence through a turbulence structure, reducing the adhesion of scale to the inner walls of pipes and equipment, thus improving the quality of circulating water and extending the service life of heat exchange equipment and pipes.

[0025] Specifically, the water outlet of the first filter component 1 is sealed and connected to the water inlet of the second filter component 2, and the water outlet of the second filter component 2 is sealed and connected to the water inlet of the anti-scaling component 3. A sealing gasket can be set at the connection to enhance the sealing effect and prevent water leakage from affecting the system's operating efficiency.

[0026] The first filter assembly 1 includes a first housing 11, inside which a flow equalization assembly 12 and a first filter unit 13 are arranged sequentially along the water flow direction. Circulating water first enters the first housing 11 and is evenly distributed by the flow equalization assembly 12, ensuring uniform distribution across the cross-section of the first housing 11 and preventing localized accumulation of impurities on the filter unit surface due to excessively rapid local flow. The evenly distributed water then flows to the first filter unit 13, which traps larger solid impurities such as silt and biological debris in the water, completing the initial filtration process.

[0027] The second filter assembly 2 includes a second housing 21, inside which a second filter unit 22 is detachably installed. The filtration accuracy of the first filter unit 13 is lower than that of the second filter unit 22. After preliminary filtration, the water flows out of the first filter assembly 1 and enters the second housing 21, where the second filter unit 22 further traps smaller suspended particles, completing deep filtration of the circulating water and reducing the risk of clogging of the subsequent anti-scaling assembly 3 and heat exchange equipment.

[0028] The anti-scaling component 3 includes an inner pipe 31 for water flow, and multiple magnetic units 32 are disposed on the outer surface of the inner pipe 31. In some specific embodiments, the magnetic units 32 are strong magnets. After deep filtration, the water flows out of the second filter component 2 and enters the inner pipe 31. The magnetic field generated by the magnetic units 32 acts on the scale-forming ions such as calcium and magnesium in the water, changing their crystal morphology and causing them to form loose granular crystals rather than dense hard scale, thereby inhibiting the deposition of scale on the inner walls of the pipes and heat exchange equipment.

[0029] The flow disturbance component 4 is located downstream of the inner pipe 31, and a flow deflector structure 42 is provided inside the flow disturbance component 4. After the water flowing out of the inner pipe 31 enters the flow disturbance component 4, its flow direction changes multiple times under the guidance of the flow deflector structure 42, forming a strong turbulent state. The turbulent water can continuously scour the inner wall of the pipe and the flow disturbance component 4, making it difficult for loose crystal particles and residual impurities to adhere. At the same time, it is convenient for impurities to be discharged from the system through the matching sewage discharge structure, keeping the inside of the device clean.

[0030] In some embodiments, the flow equalization component 12 includes a plate with a plurality of through holes.

[0031] In some embodiments, the first filtration unit 13 includes a plurality of first filter plates arranged sequentially along the water flow direction, the pore size of the plurality of first filter plates decreases along the water flow direction, and a gap is provided between two adjacent first filter plates.

[0032] The circulating water filtration device for thermal power plants in this embodiment further improves the water flow distribution effect by optimizing the structure of the flow equalization component 12. At the same time, it adopts multiple sets of first filter plates with gradient pore sizes to achieve graded coarse filtration, which improves the initial filtration efficiency and extends the service life of the first filter unit 13.

[0033] In some specific embodiments, the through hole extends in the direction facing the water flow; in other words, the length of the through hole is greater than the thickness of the plate, and it protrudes in the direction facing the water flow. The through hole has a cylindrical structure, which allows the circulating water entering the first housing 11 to be fully distributed, forming a uniform water flow distribution on the cross-section of the first housing 11, and avoiding the accumulation of impurities due to excessively fast local water flow.

[0034] The first filtration unit 13 includes multiple first filter plates arranged sequentially along the water flow direction. The pore size of the multiple first filter plates decreases along the water flow direction, and there is a gap between adjacent first filter plates. At least three sets of first filter plates can be set, and the gap between adjacent first filter plates is 100-120mm. The filter screen of the first filter plates is made of stainless steel woven mesh. Each set of first filter plates is fixed to the inner wall of the first housing 11 by bolts, and any set of first filter plates can be replaced individually according to the usage.

[0035] In some embodiments, the second filtration unit 22 includes a plurality of second filter plates arranged sequentially along the water flow direction, wherein the filtration aperture of the second filter plates is smaller than the filtration aperture of the first filter plate located at the downstream end.

[0036] In this embodiment, the second filtration unit 22 includes multiple second filter plates arranged sequentially along the water flow direction. The pore size of the second filter plates is smaller than that of the first filter plate located at the downstream end. The second filter plates are PP filter plates. The cross-section of the second housing 21 is rectangular, and the second filter plates are rectangular and fit into the second housing 21. The second filter plates are detachably inserted into the second housing 21 along the direction perpendicular to the water flow. Parts of the second filter plates are located outside the second housing 21, and the portions of the multiple second filter plates located outside the housing are connected to connecting plates. All second filter plates can be simultaneously pulled out or inserted through the connecting plates, simplifying maintenance operations.

[0037] At least three sets of second filter plates can be installed, with a spacing of 80-100mm between adjacent second filter plates. The edges of the second filter plates are tightly fitted to the inner wall of the second housing 21, eliminating dead zones in water flow and ensuring that all water is filtered by the second filter plates.

[0038] In some embodiments, the anti-scalding component 3 further includes a magnetic shielding strip 33 and an outer pipe 34. The magnetic shielding strip 33 covers the outside of the plurality of magnetic units 32, and the outer pipe 34 is sleeved on the outside of the magnetic shielding strip 33 and is arranged coaxially with the inner pipe 31.

[0039] In this embodiment, the magnetic shielding strip 33 covers the outside of the multiple magnetic units 32, and the outer pipe 34 is sleeved on the outside of the magnetic shielding strip 33 and arranged coaxially with the inner pipe 31. The magnetic units 32 are strong magnets, which are uniformly fixed on the outer side of the inner pipe 31. The magnetic shielding strip 33 is tightly attached to the outer surface of the multiple magnetic units 32 to form a continuous shielding layer.

[0040] The magnetic shielding strip 33 can concentrate magnetic field energy and reduce the outward diffusion of the magnetic field, forming a uniform and stable strong magnetic field environment inside the inner pipe 31. This enhances the effect on scale-forming ions such as calcium and magnesium in the water and better changes their crystal morphology. The outer pipe 34 can protect the magnetic unit 32 and the magnetic shielding strip 33 from corrosion by the external environment, while preventing water flow from directly washing over the magnetic unit 32, thus preventing the magnetic unit 32 from falling off or its performance from deteriorating.

[0041] The ports of the outer pipe 34 and the magnetic shielding strip 33 can be fitted with caps. The caps are sealed to the outer pipe 34 by a sealing element to prevent water from entering the interlayer space where the magnetic unit 32 is located, thus preventing the magnetic unit 32 from becoming damp and failing. The scale prevention component 3 can be inserted into the outlet end of the second filter component 2, so that the water filtered by the second filter unit 22 flows directly into the inner pipe 31, shortening the water flow path and ensuring the magnetization effect.

[0042] In some embodiments, the flow disturbance component 4 includes an outer shell 41, which is connected to the outlet end of the inner pipe 31. A flow deflector structure 42 is disposed inside the outer shell 41. The flow deflector structure 42 includes a plurality of deflector plates stacked in a direction perpendicular to the water flow, and a meandering flow deflector channel is formed between two adjacent deflector plates.

[0043] In some embodiments, the flow-disrupting component 4 further includes a flow-guiding component 43, which is a tapered tube structure. The inner diameter of the tapered tube structure contracts along the water flow direction. The inlet end of the tapered tube structure is connected to the outlet end of the inner pipe 31, and the outlet end of the tapered tube structure is located upstream of the baffle structure 42.

[0044] In some embodiments, the turbulence assembly 4 further includes a flushing pipe and a drain outlet opened at the bottom of the housing 41. At least a portion of the flushing pipe is located inside the housing 41, and a plurality of flushing holes are opened on the pipe wall of the flushing pipe, the flushing holes corresponding to the baffle structure 42.

[0045] In this embodiment, the baffle structure 42 includes multiple baffle plates spaced apart and stacked along a direction perpendicular to the water flow, forming a meandering baffle channel between adjacent baffle plates. The baffle plates extend generally along the water flow direction and repeatedly fold along a direction perpendicular to the water flow. The outer shell 41 is a circular tube structure, and the outer edge of the baffle plates is connected to the inner wall of the circular tube. When the water flows through the baffle channel, it changes its flow direction multiple times, forming a strong turbulent state that continuously scours the inner wall surface, making it difficult for loose crystalline particles and residual impurities to adhere.

[0046] The flow-turbulence assembly 4 also includes a flow-guiding component 43, which is a tapering tube structure. The inner diameter of the tapering tube structure narrows along the water flow direction. The inlet end of the tapering tube structure is connected to the outlet end of the inner pipe 31, and the outlet end of the tapering tube structure is located upstream of the baffle structure 42. The inner diameter of the tapering tube structure decreases linearly along the water flow direction, with a tapering angle of 15°. Its inner wall smoothly transitions with the inner wall of the inner pipe 31, preventing the formation of eddies in the water flow at this point. The tapering tube structure can accelerate the water flow, increase the water velocity entering the baffle structure 42, and further enhance the turbulence effect and scale removal ability.

[0047] The turbulence-disrupting assembly 4 also includes a flushing pipe and a drain outlet located at the bottom of the outer casing 41. At least a portion of the flushing pipe is located inside the outer casing 41, and multiple flushing holes are formed on the pipe wall, corresponding to the baffle structure 42. The flushing pipe is arranged above the baffle structure 42 along the length of the outer casing 41, with flushing holes of 5mm diameter evenly distributed on the pipe wall. The water inlet end of the flushing pipe extends to the outside of the outer casing 41 and is equipped with a solenoid valve. The drain outlet is located at the lowest point of the bottom of the outer casing 41, using a DN80 flange interface, and a manual butterfly valve is installed at the interface. After the system has been running for a period of time, high-pressure water can be introduced through the flushing pipe to flush the baffle structure 42 and the inner wall of the outer casing 41, flushing the attached impurities and loose scale into the bottom drain outlet for discharge. The flushing process does not require disassembly of the equipment and can be completed online.

[0048] In some embodiments, the first housing 11 and the second housing 21 are in sealed communication, and the water outlet of the second housing 21 is in sealed communication with the water inlet of the inner pipe 31.

[0049] In some embodiments, the circulating water filtration device for thermal power plants further includes an upper cover 5, which is detachably connected to the water inlet end of the first housing 11 and has a water inlet communicating with the interior of the first housing 11.

[0050] In this embodiment, the water outlet of the first housing 11 and the water inlet of the second housing 21 can be connected by a flange. A nitrile rubber sealing gasket is pasted at the connection point, and the sealing effect is ensured by tightening with bolts. Alternatively, a clamp can be used for fixation, and waterproof tape can be wrapped around the outside of the interface to further enhance the sealing performance. The sealed connection structure can prevent leakage of circulating water during the filtration process, ensure the stability of the system's flow rate and pressure, and avoid affecting the subsequent filtration and scale prevention effects.

[0051] The outlet end of the second housing 21 is sealed and connected to the inlet end of the inner pipe 31. A fluororubber sealing gasket is installed inside the outlet end interface of the second housing 21, and the inlet end of the inner pipe 31 is inserted into the outlet interface of the second housing 21 to a depth of 40-50mm, and then fixed with flange bolts. This connection method can shorten the water flow path, allowing the water filtered by the second filter unit 22 to flow directly into the inner pipe 31, reducing energy loss at the connection point, and preventing unfiltered water from entering the anti-scaling component 3.

[0052] The top cover 5 is detachably connected to the water inlet of the first housing 11, and the top cover 5 has a water inlet communicating with the interior of the first housing 11. The top cover 5 is connected to the water inlet of the first housing 11 via a flange or snap-fit, and a sealing gasket is affixed between the flange faces. The water inlet is connected to the water inlet pipe of the power plant's circulating water system, and the circulating water enters the interior of the first filter assembly 1 through the water inlet. When it is necessary to inspect, clean, or replace the flow equalization assembly 12 and the first filter unit 13 inside the first housing 11, the top cover 5 can be removed simply by unfastening the flange bolts, without disassembling the entire first filter assembly 1, which is convenient and reduces system downtime for maintenance.

[0053] 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.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A circulating water filtration device for thermal power plants, characterized in that, include: A first filter assembly, a second filter assembly, and an anti-scaling assembly are sequentially connected along the water flow direction. The first filter assembly includes a first housing, a flow equalization component and a first filter unit disposed inside the first housing and arranged sequentially along the water flow direction. The second filter assembly includes a second housing and a second filter unit detachably installed inside the second housing, wherein the filtration accuracy of the first filter unit is less than that of the second filter unit. The anti-scaling assembly includes an inner pipe for water flow and a plurality of magnetic units disposed on the outer side of the inner pipe, wherein the magnetic units are used to inhibit scale formation. A flow-disrupting component is located downstream of the inner pipe, and the flow-disrupting component has a flow-bending structure inside to create turbulence in the water.

2. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The flow equalization component includes a plate body with multiple through holes.

3. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The first filtration unit includes multiple first filter plates arranged sequentially along the water flow direction. The pore size of the multiple first filter plates decreases along the water flow direction, and a gap is provided between two adjacent first filter plates.

4. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The second filtration unit includes a plurality of second filter plates arranged sequentially along the water flow direction, wherein the filtration aperture of the second filter plates is smaller than the filtration aperture of the first filter plate located at the downstream end.

5. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The anti-scaling component also includes: A magnetic shielding strip, which covers the outside of the plurality of magnetic units; An outer pipe is fitted around the outside of the magnetic shielding strip and is arranged coaxially with the inner pipe.

6. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The flow-disrupting component includes an outer shell that is connected to the outlet end of the inner pipe. The flow-deflecting structure is located inside the outer shell and includes multiple flow-deflecting plates stacked in a direction perpendicular to the water flow. A meandering flow-deflecting channel is formed between two adjacent flow-deflecting plates.

7. The circulating water filtration device for thermal power plants according to claim 6, characterized in that, The flow-disrupting component also includes a flow-guiding component, which is a tapered tube structure. The inner diameter of the tapered tube structure narrows along the water flow direction. The inlet end of the tapered tube structure is connected to the outlet end of the inner pipe, and the outlet end of the tapered tube structure is located upstream of the baffle structure.

8. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The turbulence-disrupting assembly also includes a flushing pipe and a drain outlet located at the bottom of the outer casing. At least a portion of the flushing pipe is located inside the outer casing, and the flushing pipe has multiple flushing holes on its wall, which correspond to the baffle structure.

9. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, The first housing and the second housing are in sealed communication, and the water outlet of the second housing is in sealed communication with the water inlet of the inner pipe.

10. The circulating water filtration device for thermal power plants according to claim 1, characterized in that, It also includes a top cover, which is detachably connected to the water inlet of the first housing, and the top cover has a water inlet communicating with the interior of the first housing.

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