Rotational flow filter
By combining the swirling and settling sections of the cyclone filter with the design of crushing balls, the problem of large-sized scale clogging is solved, achieving efficient interception and crushing, and improving the efficiency and stability of greywater treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-04-14
AI Technical Summary
Existing technologies are inefficient at handling large, flaky scale, which leads to blockages in heat exchange equipment and affects production continuity and economy.
A cyclone filter, consisting of a cyclone section and a settling section, is used to intercept and break down large scale flakes by using broken small balls to impact and rub against them in a strong cyclone field. This is combined with filter screen filtration and cyclone separation.
It improves the efficiency and stability of greywater treatment, avoids frequent cleaning operations caused by blockages, and ensures the normal operation of heat exchange equipment.
Smart Images
Figure CN121850133A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water treatment technology, and more specifically to a cyclone filter. Background Technology
[0002] Entrained flow gasification (EFG) technology is one of the core processes in modern coal chemical engineering. While producing syngas, it generates a large amount of high-temperature, high-solids-content ash water. This ash water contains unreacted suspended carbon particles, metal oxides, silicates, and other inorganic salts, which readily precipitate and form a hard scale layer during system circulation. To maintain system water and ammonia-nitrogen balance, some of the ash water must be cooled to below 45°C before being transported to the biochemical system for further treatment. However, the temperature of the ash water before entering the heat exchanger is typically above 60°C, and during pipeline transport, due to temperature changes, flow rate fluctuations, and complex water composition, scale gradually forms on the inner walls of the pipes. These scale layers are mostly in the form of flakes or blocks, typically 1-2 mm thick, and can reach centimeter-level lengths or widths. As the scale layer thickness increases, its adhesion weakens, eventually leading to its detachment due to hydraulic erosion or temperature stress. The detached scale flakes can easily enter the heat exchange equipment with the water flow, causing blockage of the heat exchange tubes, severely reducing heat exchange efficiency, and even leading to system shutdown for cleaning, which seriously affects the continuity and economy of production.
[0003] Currently, two main solutions are used to address scale buildup: traditional filters and hydrocyclones. However, both have limitations. With traditional filters, over time, the scale buildup in the grey water increases and hardens, quickly clogging the filter screen and requiring frequent disassembly and manual cleaning, significantly impacting grey water treatment efficiency. Hydrocyclones utilize centrifugal force for solid-liquid separation, offering high separation efficiency for spherical or near-spherical particles with a density greater than water and a diameter of tens of micrometers. However, their separation efficiency heavily depends on particle density and shape. When processing large, thin, sheet-like scale (which may have a density similar to water and is easily carried by the fluid), the centrifugal force generated by the hydrocyclone is insufficient to effectively throw it against the wall for discharge. This results in the scale entering the hydrocyclone's "short-circuit flow" and being discharged directly from the overflow outlet, ultimately entering subsequent heat exchange equipment.
[0004] Therefore, there is an urgent need to develop a greywater treatment device with high cleaning efficiency and the ability to handle large-sized, flaky scale. Summary of the Invention
[0005] The purpose of this invention is to overcome the filtration problems of gray scale flakes in the prior art and to provide a cyclone filter that can intercept and break up large-sized, flaky scale flakes.
[0006] To achieve the above objectives, the present invention provides a cyclone filter, comprising an internally hollow shell, the shell including a cyclone section and a settling section that are interconnected, the cyclone section having a circular cross-section; A horizontally positioned water inlet pipe is inserted into the side of the vortex section, and the water inlet pipe is tangent to the vortex section; A water outlet pipe is inserted at the top of the shell, and a filter screen is opened in the part of the water outlet pipe inside the shell. Several small crushing balls are set in the swirl section. The density of the crushing balls is less than that of water, and the diameter of the crushing balls is larger than the pore size of the filter screen. The outlet of the inlet pipe is higher than the filter screen in the vertical direction; The shell has a discharge port located on the settling section.
[0007] In some embodiments, the flow rate of grey water into the housing through the inlet pipe is not less than 2 m / s.
[0008] In some embodiments, the filter screen includes a plurality of filter holes, which are evenly spaced along the circumferential distance of the water outlet pipe.
[0009] In some embodiments, the shape of the filter pores includes at least one of elongated, elliptical, and triangular shapes.
[0010] In some embodiments, the swirl section is cylindrical, and the outlet pipe is coaxial with the swirl section.
[0011] In some embodiments, the diameter of the broken balls is greater than or equal to 10 mm.
[0012] In some embodiments, the density of the broken pellets is 0.90-0.92 g / cm³.
[0013] In some embodiments, the settling section is conical, and the diameter of the settling section gradually decreases away from the swirling section.
[0014] In some embodiments, the discharge outlet is located at the bottom end of the settling section.
[0015] In some embodiments, a sealing ring is fitted onto the water outlet pipe, and the sealing ring is located at the connection between the water outlet pipe and the vortex section.
[0016] Through the above technical solution, high-temperature grey water is tangentially pumped into the shell through the inlet pipe. The high-speed rotating fluid forms a strong centrifugal force field in the swirling section. Solid particles with a density greater than water (such as most sand particles and metal oxide particles) are thrown against the cylinder wall and move spirally downwards along the wall surface, eventually being discharged from the outlet, achieving preliminary purification. After preliminary purification, the separated liquid forms a downward outer swirling flow and an upward inner swirling flow. The inner swirling flow may still carry some large-sized, flaky scale flakes. These scale flakes are intercepted outside the filter screen to prevent them from being discharged through the outlet pipe. At this time, in the strong swirling field, the broken small balls in the swirling section, due to the smaller centrifugal force they experience, converge in the low-pressure area near the central axis of the shell, that is, near the outer surface of the filter screen, and continue to rotate and bounce at high speed. This continuously impacts, rubs, and shears the large-sized, flaky scale flakes that are intercepted and attached to the outer surface of the filter screen, thereby breaking and abrading the large, tough scale flakes into smaller fragments or particles. Once the size of the particles is smaller than the filter screen aperture, they can be carried by the main fluid, pass smoothly through the filter screen, and be discharged through the outlet pipe. These broken small particles no longer pose a clogging threat to downstream heat exchange pipelines. This application treats grey water through three steps: cyclone separation, filter screen filtration, and broken-up particle cutting. It can intercept and break up large-sized, flaky scale flakes in grey water, avoiding frequent cleaning operations caused by clogging and improving the efficiency and stability of grey water treatment. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the cyclone filter disclosed in this application; Figure 2 This is a cross-sectional view of the cyclone filter disclosed in this application.
[0018] Explanation of reference numerals in the attached figures 1. Shell; 11. Swirl section; 12. Settling section; 2. Inlet pipe; 3. Outlet pipe; 4. Filter screen; 41. Filter hole; 5. Crushing ball; 6. Discharge port; 7. Sealing ring. Detailed Implementation
[0019] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.
[0020] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.
[0021] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.
[0022] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.
[0023] Reference Figure 1 and Figure 2 This application provides a cyclone filter, including a hollow housing 1. The housing 1 includes a cyclone section 11 and a settling section 12 that are interconnected. The cross-section of the cyclone section 11 is circular. A horizontally arranged water inlet pipe 2 is inserted into the side of the swirl section 11, and the water inlet pipe 2 is tangent to the swirl section 11; A water outlet pipe 3 is inserted at the top of the shell 1. A filter screen 4 is opened in the part of the water outlet pipe 3 inside the shell 1. Several small crushing balls 5 are arranged in the swirl section 11. The density of the small crushing balls 5 is less than that of water, and the diameter of the small crushing balls 5 is larger than the pore size of the filter screen 4. The outlet of the water inlet pipe 2 is higher than the filter screen 4 in the vertical direction; The shell 1 has an outlet 6, which is located on the settling section 12.
[0024] This application provides a cyclone filter, including a housing 1. The housing 1 is hollow inside and has openings at both the upper and lower ends. The upper opening is a water outlet, and the lower opening is a discharge outlet 6. The housing 1 includes a cyclone section 11 at the upper part and a settling section 12 at the lower part. The cyclone section 11 and the settling section 12 are connected. The cross-section of the cyclone section 11 is circular. The water outlet is connected to the inner cavity of the cyclone section 11, and the discharge outlet 6 is connected to the inner cavity of the settling section 12.
[0025] A water inlet pipe 2 is inserted into the side wall of the swirl section 11. The water inlet pipe 2 is placed horizontally and its axis is tangent to the swirl section 11. During the purification operation, the kinetic water enters the swirl section 11 tangentially through the water inlet pipe 2, thereby forming a rotating flow field in the swirl section 11.
[0026] A water outlet pipe 3 is inserted at the outlet of the top of the vortex section 11. The lower end of the water outlet pipe 3 extends into the vortex section 11. The lower end of the water outlet pipe 3 is sealed to prevent the gray water from flowing in directly. The upper end of the water outlet pipe 3 is exposed and open at the top to connect to other downstream devices. The water outlet pipe 3 and the housing 1 can be connected by welding or other fixed methods, or they can be detached by clamps or other devices. The above methods are all conventional settings in the field and will not be described in detail here.
[0027] A filter screen 4 is installed in the portion of the outlet pipe 3 located inside the housing 1. The filter screen 4 is located on the outer wall near the lower end of the outlet pipe 3. The filter screen 4 connects the inner cavity of the vortex section 11 with the inner cavity of the outlet pipe 3, allowing the filtered grey water to flow outward along the outlet pipe 3. The outlet of the inlet pipe 2 is vertically higher than the filter screen 4, meaning that the connection point between the inlet pipe 2 and the vortex section 11 is vertically higher than the filter screen 4.
[0028] Multiple small crushing balls 5 are arranged within the swirl section 11. The density of the crushing balls 5 is less than that of water. These balls serve as a cleaning medium, filling the filter screen 4 area inside the equipment. Under the influence of the rotating flow field, the crushing balls 5 rotate along the periphery of the filter screen 4, thereby crushing and cutting the scale flakes. The diameter of the crushing balls 5 is larger than the pore size of the filter screen 4, ensuring that the crushing balls 5 are completely confined to the outside of the filter screen 4 and will not be lost with the water flow. Multiple crushing balls 5 can crush scale flakes more quickly, improving purification efficiency.
[0029] During the purification process, this application includes three filtration steps: cyclone separation, filtration with a filter screen 4, and cutting of small broken balls 5.
[0030] Cyclone separation: High-speed, high-temperature ash water is tangentially pumped into the shell 1 through the inlet pipe 2. The high-speed rotating fluid forms a strong centrifugal force field in the cyclone section 11. Solid particles with a density greater than water (such as most sand particles and metal oxide particles) are thrown towards the cylinder wall, spiral downwards along the wall surface, and finally discharged from the outlet 6, achieving preliminary purification.
[0031] Filter 4: After initial purification, the separated liquid will form a downward outer vortex and an upward inner vortex. The inner vortex may still carry some large, flaky scale. These scales are intercepted outside the filter 4 to prevent them from being discharged through the outlet pipe 3.
[0032] Cutting of broken small balls 5: At this time, in the strong swirling field, the broken small balls 5 in the swirling section 11 converge in the low-pressure area near the central axis of the shell 1, that is, near the outer surface of the filter screen 4, due to the small centrifugal force they are subjected to. They continuously rotate and jump at high speed, thereby continuously impacting, rubbing and shearing the large-sized, flaky scale that is intercepted and attached to the outer surface of the filter screen 4. This continuous mechanical force can effectively break and abrade the large, tough scale into smaller fragments or particles. Once their size is smaller than the aperture of the filter screen 4, they can be carried by the main fluid, pass smoothly through the filter screen 4, and be discharged through the outlet pipe 3. These broken small particles no longer pose a blockage threat to the downstream heat exchange pipeline.
[0033] This application treats grey water through three steps: cyclone separation, filtration by filter screen 4, and cutting by crushing small balls 5. It can intercept and break up large-sized, flaky scale flakes in grey water, avoiding frequent cleaning operations caused by clogging and improving the efficiency and stability of grey water treatment.
[0034] Reference Figure 2 In some embodiments, the flow rate of grey water into the housing 1 through the inlet pipe 2 is not less than 2 m / s.
[0035] In some embodiments, the flow velocity of grey water into the housing 1 through the inlet pipe 2 is not less than 2 m / s. The high-speed flow of grey water will generate sufficient inlet kinetic energy, thereby forming a strong vortex and giving the crushing balls 5 sufficient impact kinetic energy. If the flow velocity is too low, the centrifugal separation effect will be poor and the impact force of the balls will be insufficient, making it difficult to generate sufficient crushing effect on large-sized, flaky scale flakes, thus affecting the efficiency of grey water filtration.
[0036] Reference Figure 2 In some embodiments, the filter screen 4 includes a plurality of filter holes 41, which are evenly spaced along the circumferential interval of the water outlet pipe 3.
[0037] In some embodiments, the filter screen 4 includes a plurality of filter holes 41, which are evenly spaced along the circumference of the water outlet pipe 3. The regularly arranged filter holes 41 can ensure the uniformity of the cutting of the attached scale by the polypropylene balls and reduce scale residue.
[0038] Reference Figure 2 The filter holes 41 of the filter screen 4 include at least one of the following shapes: elongated, elliptical, and triangular.
[0039] In some embodiments, the filter holes 41 of the filter screen 4 can be non-circular in shape. The shape of the filter holes 41 can be elongated, elliptical, triangular, etc. In this embodiment, the filter holes 41 are elongated, and the length direction of the filter holes 41 is consistent with the axial direction of the water outlet pipe 3. Designing filter holes 41 with a different shape from the crushed balls 5 can prevent the crushed balls 5 from being embedded or stuck in the round holes under water pressure, thus affecting the mobility and cleaning effect of the crushed balls 5.
[0040] Reference Figure 2 In some embodiments, the swirl section 11 is cylindrical, and the water outlet pipe 3 is coaxial with the swirl section 11.
[0041] In some embodiments, the swirl section 11 is cylindrical in shape, the inlet pipe 2 is inserted into the side wall of the swirl section 11, and the inlet pipe 3 is coaxial with the swirl section 11, so that the crushing balls 5 can better surround the filter screen 4 to crush the scale.
[0042] Reference Figure 2 In some embodiments, the diameter of the crushing ball 5 is greater than or equal to 10 mm.
[0043] In some embodiments, the diameter of the crushing ball 5 is greater than or equal to 10 mm. A crushing ball 5 with sufficient mass and volume can ensure that it has sufficient impact momentum, which can crush larger and harder scale flakes and improve crushing efficiency. However, a crushing ball 5 that is too small is difficult to effectively crush hard scale flakes and affects crushing efficiency.
[0044] Reference Figure 2 In some embodiments, the density of the broken pellets 5 is 0.90-0.92 g / cm³.
[0045] In some embodiments, the density of the crushing pellets 5 is 0.90-0.92 g / cm³ to ensure that they aggregate towards the axis rather than move towards the wall in the swirling flow. In this embodiment, the crushing pellets 5 are polypropylene pellets. Polypropylene (PP) has stable chemical properties, is corrosion-resistant and wear-resistant, and exhibits minimal performance degradation in high-temperature ash water over long periods, making it relatively convenient to use.
[0046] Reference Figure 2 In some embodiments, the settling section 12 is conical, and the diameter of the settling section 12 gradually decreases in the direction away from the swirling section 11.
[0047] In some embodiments, the settling section 12 is conical and its diameter gradually decreases in the direction away from the swirling section 11. The conical settling section 12 makes the inner wall of the settling section 12 inclined, so that the high-density particles separated to the wall by centrifugal force and settled can slide down the inner wall more quickly and reduce the probability of particles remaining on the inner wall.
[0048] Reference Figure 2 In some embodiments, the outlet 6 is located at the bottom end of the settling section 12.
[0049] In some embodiments, the outlet 6 is located at the bottom of the settling section 12, which facilitates the direct discharge of high-density particles that slide down along the outlet 6.
[0050] Reference Figure 1 and Figure 2 In some embodiments, a sealing ring 7 is fitted on the water outlet pipe 3, and the sealing ring 7 is located at the connection position between the water outlet pipe 3 and the swirl section 11.
[0051] In some embodiments, an annular sealing ring 7 is fitted in the middle of the water outlet pipe 3. The sealing ring 7 is located at the connection position between the water outlet pipe 3 and the swirl section 11, which reduces the possibility of gray water splashing out of the housing 1 and protects the external environment.
[0052] In a preferred embodiment of the cyclone filter disclosed in this application, a housing 1 is included. The housing 1 is hollow inside and has openings at both the upper and lower ends. The upper opening is formed as an outlet, and the lower opening is formed as a discharge port 6. The housing 1 includes a cyclone section 11 located at the upper part and a settling section 12 located at the lower part. The cyclone section 11 and the settling section 12 are connected. The cyclone section 11 is cylindrical, and the outlet is connected to the inner cavity of the cyclone section 11. The settling section 12 is conical, and its diameter gradually decreases in the direction away from the cyclone section 11. The discharge port 6 is connected to the inner cavity of the settling section 12.
[0053] A water inlet pipe 2 is inserted into the side wall of the swirl section 11. The water inlet pipe 2 is placed horizontally and its axis is tangential to the swirl section 11. During the purification operation, the kinetic water enters the swirl section 11 tangentially through the water inlet pipe 2, thereby forming a rotating flow field in the swirl section 11. The velocity of the ash water flowing into the shell 1 through the water inlet pipe 2 is not less than 2 m / s.
[0054] A water outlet pipe 3 is inserted at the outlet of the top of the vortex section 11. The water outlet pipe 3 is coaxial with the vortex section 11, and the lower end of the water outlet pipe 3 extends into the vortex section 11. The lower end of the water outlet pipe 3 is sealed to prevent the direct flow of ash water. The upper end of the water outlet pipe 3 is exposed and open to connect to other downstream devices. An annular sealing ring 7 is fitted in the middle of the water outlet pipe 3. The sealing ring 7 is located at the connection between the water outlet pipe 3 and the vortex section 11 to reduce the possibility of ash water splashing out of the housing 1.
[0055] A filter screen 4 is installed in the portion of the outlet pipe 3 located inside the housing 1. The filter screen 4 is located on the outer wall near the lower end of the outlet pipe 3. The filter screen 4 connects the inner cavity of the vortex section 11 with the inner cavity of the outlet pipe 3, allowing the filtered grey water to flow outward along the outlet pipe 3. The outlet of the inlet pipe 2 is vertically higher than the filter screen 4, meaning that the connection point between the inlet pipe 2 and the vortex section 11 is vertically higher than the filter screen 4.
[0056] The filter screen 4 includes a plurality of filter holes 41, which are evenly spaced along the circumference of the water outlet pipe 3. The filter holes 41 of the filter screen 4 are not circular in shape; they can be elongated, elliptical, triangular, etc. In this embodiment, the filter holes 41 are elongated, and the length direction of the filter holes 41 is consistent with the axial direction of the water outlet pipe 3.
[0057] The swirl section 11 contains crushing balls 5. In this embodiment, the crushing balls are polypropylene balls. Polypropylene (PP) is chemically stable, corrosion-resistant, and wear-resistant, exhibiting minimal performance degradation in high-temperature grey water over long periods, making it convenient to use. The density of the crushing balls 5 is less than that of water. As a cleaning medium, the crushing balls 5 fill the filter screen 4 area inside the equipment. Under the action of the rotating flow field, the crushing balls 5 rotate along the periphery of the filter screen 4, thereby crushing and cutting the scale flakes. The diameter of the crushing balls 5 is larger than the pore size of the filter screen 4, and is greater than or equal to 10 mm, ensuring that the crushing balls 5 are completely confined to the outside of the filter screen 4 and will not be lost with the water flow. Multiple crushing balls 5 are provided in the swirl section 11. The density of the crushing balls 5 is 0.90-0.92 g / cm³, and in this embodiment, the density is 0.91 g / cm³.
[0058] During the purification process, this application includes three filtration steps: cyclone separation, filtration with a filter screen 4, and cutting of small broken balls 5.
[0059] Cyclone separation: High-speed, high-temperature ash water is tangentially pumped into the shell 1 through the inlet pipe 2. The high-speed rotating fluid forms a strong centrifugal force field in the cyclone section 11. Solid particles with a density greater than water (such as most sand particles and metal oxide particles) are thrown towards the cylinder wall, spiral downwards along the wall surface, and finally discharged from the outlet 6, achieving preliminary purification.
[0060] Filter 4: After initial purification, the separated liquid will form a downward outer vortex and an upward inner vortex. The inner vortex may still carry some large, flaky scale. These scales are intercepted outside the filter 4 to prevent them from being discharged through the outlet pipe 3.
[0061] Cutting of broken small balls 5: At this time, in the strong swirling field, the broken small balls 5 in the swirling section 11 converge in the low-pressure area near the central axis of the shell 1, that is, near the outer surface of the filter screen 4, due to the small centrifugal force they are subjected to. They continuously rotate and jump at high speed, thereby continuously impacting, rubbing and shearing the large-sized, flaky scale that is intercepted and attached to the outer surface of the filter screen 4. This continuous mechanical force can effectively break and abrade the large, tough scale into smaller fragments or particles. Once their size is smaller than the aperture of the filter screen 4, they can be carried by the main fluid, pass smoothly through the filter screen 4, and be discharged through the outlet pipe 3. These broken small particles no longer pose a blockage threat to the downstream heat exchange pipeline.
[0062] This application treats grey water through three steps: cyclone separation, filtration by filter screen 4, and cutting by crushing small balls 5. It can intercept and break up large-sized, flaky scale flakes in grey water, avoiding frequent cleaning operations caused by clogging and improving the efficiency and stability of grey water treatment.
[0063] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0064] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.
Claims
1. A cyclone filter, comprising an internally hollow housing (1), characterized in that, The shell (1) includes a swirling section (11) and a settling section (12) that are connected to each other, and the cross-section of the swirling section (11) is circular; A horizontally arranged water inlet pipe (2) is inserted into the side of the vortex section (11), and the water inlet pipe (2) is tangent to the vortex section (11); A water outlet pipe (3) is inserted at the top of the shell (1). A filter screen (4) is opened in the part of the water outlet pipe (3) inside the shell (1). A number of broken balls (5) are arranged in the swirling section (11). The density of the broken balls (5) is less than that of water. The diameter of the broken balls (5) is larger than the pore size of the filter screen (4). The outlet of the inlet pipe (2) is higher than the filter screen (4) in the vertical direction. The shell (1) is provided with an outlet (6), which is located on the settling section (12).
2. The cyclone filter according to claim 1, characterized in that, The flow rate of grey water into the housing (1) through the water inlet pipe (2) is not less than 2 m / s.
3. The cyclone filter according to claim 1, characterized in that, The filter screen (4) includes a plurality of filter holes (41), which are evenly spaced along the circumferential interval of the water outlet pipe (3).
4. The cyclone filter according to claim 3, characterized in that, The filter holes (41) of the filter screen (4) include at least one of the following shapes: elongated, elliptical, and triangular.
5. The cyclone filter according to claim 1, characterized in that, The swirl section (11) is cylindrical, and the water outlet pipe (3) is coaxial with the swirl section (11).
6. The cyclone filter according to claim 1, characterized in that, The diameter of the broken small ball (5) is greater than or equal to 10 mm.
7. The cyclone filter according to claim 7, characterized in that, The density of the broken small balls (5) is 0.90-0.92 g / cm³.
8. The cyclone filter according to any one of claims 1-7, characterized in that, The settling section (12) is conical, and the diameter of the settling section (12) gradually decreases in the direction away from the swirling section (11).
9. The cyclone filter according to claim 8, characterized in that, The outlet (6) is located at the bottom of the settling section (12).
10. The cyclone filter according to any one of claims 1-7, characterized in that, A sealing ring (7) is fitted on the water outlet pipe (3), and the sealing ring (7) is located at the connection position between the water outlet pipe (3) and the vortex section (11).