Biological water purification device for fish culture

Abstract

The utility model provides a biological water purification device for fish culture, the water purification device comprises a closed bin, the top of the closed bin can be opened and closed, a partition plate is formed in the closed bin, the partition plate is used for dividing the space in the closed bin into a filtering area and a water outlet area which are adjacently arranged in the horizontal direction, and the bottoms of the filtering area and the water outlet area are in fluid communication; the filtering area is provided with a plurality of fluidized bed fillers, an aeration assembly for driving the fluidized bed fillers to move in fluid and a filtering plate; the filter plate is used for limiting a filter material in the filter area and is arranged at the bottom of the filter area; the aeration assembly comprises an upper horizontal clamping plate, a lower horizontal clamping plate and a gas diffusion piece detachably arranged between the upper horizontal clamping plate and the lower horizontal clamping plate; a water inlet is formed in the side wall of the filtering area; a water outlet is formed in the side wall of the water outlet area. The aeration assembly forms fine bubbles, increases dissolved oxygen in water, and drives the fluidized bed filler to suspend and form a fluidized state at the same time, so that the fluidized bed filler is more fully contacted with water flow.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology and relates to a biological water purification device for fish farming. Background Technology

[0002] In fish farming, water quality management is one of the key factors in ensuring the healthy growth and high yield of fish. Fish excrement, uneaten feed, and the decomposition of organic matter produce harmful substances such as ammonia nitrogen and nitrite. The accumulation of these substances can poison fish and even lead to mass mortality. Although traditional filtration systems (such as physical filtration and biological filtration) can partially solve water quality problems, they often have limitations such as low efficiency, large footprint, and high maintenance costs.

[0003] For the above considerations, fluidized bed technology, as a highly efficient water treatment technology, has been widely used in fish farming in recent years. Its core principle is to utilize a fluidized carrier medium (such as sand or plastic granules) as a carrier for microbial attachment. The carrier is suspended and fluidized by the power of water or air flow. This design significantly increases the attachment area for microorganisms, improves the activity and degradation efficiency of the biofilm, and thus enables the rapid decomposition of harmful substances such as ammonia nitrogen and nitrite in the water, converting them into low-toxicity nitrates.

[0004] However, existing water purification devices using fluidized bed technology often suffer from problems such as insufficient contact between the filter media and the water flow, excessive energy consumption, low filtration efficiency, and cumbersome cleaning and replacement of the filter media.

[0005] Therefore, developing a high-efficiency, energy-saving water purification device suitable for fish farming of different scales has become an urgent technical need for the fish farming industry.

[0006] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0007] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a biological water purification device for fish farming, so as to solve the problems that existing water purification devices using fluidized bed technology often have, such as insufficient contact between filter media and water flow, excessive energy consumption, low filtration efficiency, and troublesome cleaning and replacement of filter media.

[0008] To achieve the above objectives, this utility model provides a biological water purification device for fish farming. The device includes a top-openable closed chamber with a partition forming inside. The partition divides the space inside the closed chamber into a horizontally adjacent filtration zone and an outlet zone, with the bottoms of the filtration zone and the outlet zone in fluid communication. The filtration zone is provided with several fluidized bed packings, an aeration component for driving the fluidized bed packings to move in the fluid, and a filter plate. The filter plate is used to limit the filter media in the filtration zone and is located at the bottom of the filtration zone. The aeration component includes upper and lower horizontal clamping plates and a gas diffuser detachably disposed between the upper and lower horizontal clamping plates. An inlet is formed on the side wall of the filtration zone, and an outlet is formed on the side wall of the outlet zone.

[0009] In one specific implementation, the two sides of the partition are fixed to two different inner walls of the enclosed chamber, and a gap is formed between its bottom end and the bottom plate inside the enclosed chamber.

[0010] In a more specific embodiment, the height of the gap is 4–6 cm. For example, the distance between the partition and the bottom of the enclosed compartment can be 4–5 cm or 5–6 cm.

[0011] In one specific implementation, the sidewall of the enclosed chamber of the filtration zone has a drain hole.

[0012] In a more specific embodiment, the drain hole is located on the side wall between the filter plate and the bottom plate of the sealed compartment.

[0013] In one specific embodiment, the upper and lower horizontal clamps are provided with a detachable connection structure for detachably connecting a gas diffuser.

[0014] In a more specific embodiment, the detachable connection structure is one or more of hooks, buckles, and clamps.

[0015] In a more specific embodiment, the upper and lower horizontal clamping plates include an upper clamping plate and a lower clamping plate, and the upper clamping plate is provided with an air inlet for an external air supply pipe.

[0016] In a more specific embodiment, the upper and lower horizontal clamps partially cover the cross-section of the filtration zone.

[0017] In one specific embodiment, the gas diffuser is formed with a porous structure.

[0018] In a more specific embodiment, the gas diffuser is selected from one or more of cotton strips and sponges.

[0019] In one specific embodiment, the diameter of the inlet is 25-35 mm.

[0020] In one specific embodiment, the diameter of the outlet is 45-55 mm.

[0021] In one specific implementation, the water outlet is located near the top of the enclosed chamber.

[0022] In one specific embodiment, the ratio of the volume of the fluidized bed packing to the volume of the filtration zone is (0.3 to 0.7):1.

[0023] In one specific embodiment, a static filter material is further provided between the fluidized bed packing and the filter plate, and the aeration component is located between the static filter material and the fluidized bed packing.

[0024] In a more specific embodiment, the static filter media supports and confines the fluidized bed packing within a filtration zone situated above the static filter media. In one specific embodiment, the static filter media is a matrix of Mycorrhiza uralensis.

[0025] In one specific embodiment, the filter plate is further provided with a support portion that protrudes downward, thereby creating a gap between the filter plate and the bottom plate of the enclosed chamber.

[0026] In a more specific embodiment, the distance between the filter plate and the bottom plate of the sealed chamber is set to 4-10cm. For example, the distance between the filter plate and the bottom of the sealed chamber can be 4-5cm, 5-6cm, 6-7cm, 7-8cm, 8-9cm, or 9-10cm.

[0027] In one specific embodiment, the filter plate also has a plurality of third through holes.

[0028] In a more specific embodiment, the diameter of the third through hole is 6-10 mm.

[0029] In one specific embodiment, the filtration zone is further provided with a filter diverter, which is located between the water inlet and the fluidized bed packing, and the bottom of the filter diverter has a plurality of fourth through holes.

[0030] In a more specific embodiment, the diameter of the fourth through hole is 5 to 8 mm.

[0031] In a more specific embodiment, a first filter material is further provided between the filter diverter and the inlet.

[0032] In a more specific embodiment, the partition and / or the closed compartment sidewall of the filter zone has a protruding limiting section for supporting and limiting the filter diverter.

[0033] In one specific embodiment, the water outlet area is provided with a germicidal lamp and a limiting member for limiting the germicidal lamp, the germicidal lamp including a lamp tube and a power cord.

[0034] In a more specific embodiment, a fifth through hole is also formed on the side wall of the enclosed chamber in the water outlet area for the power cord of the germicidal lamp to pass through, and the fifth through hole is located above the water outlet.

[0035] In one specific embodiment, the fluidized bed packing is selected from one or more of the following: K1 type packing, K2 type packing, K3 type packing, K4 type packing, K5 type packing, QY-PE02 packing, QY-PE03 packing, QY-PE04 packing, QY-PE08 packing, Madouyoujunku 7PLUS packing, Madouyoujunku 5S packing, and Madouyoujunku F6 packing.

[0036] As described above, the biological water purification device for fish farming of this utility model has the following beneficial effects:

[0037] 1) The water purification device described in this application forms fine bubbles through aeration components, which increases dissolved oxygen in the water. At the same time, it drives the fluidized bed packing to suspend and form a fluidized state, so that the fluidized bed packing has more sufficient contact with the water flow, which is more conducive to the formation of biofilm by microorganisms on the fluidized bed packing and rapid decomposition of harmful substances such as ammonia nitrogen and nitrite in the water, thus purifying the water quality.

[0038] 2) In the water purification device described in this application, the gas diffuser, fluidized bed packing, and static filter media of the aeration component are easy to replace and clean, thereby improving the efficiency and convenience of the device.

[0039] 3) The water purification device described in this application uses fluidized bed packing, which, compared with conventional filter media, has more sufficient contact with water flow and better biochemical filtration effect.

[0040] 4) The water purification device described in this application makes reasonable use of the space of the enclosed chamber through partitions, filter plates, filter diversion components, etc., so as to achieve multiple filtration, sewage discharge and water output in the same enclosed chamber. Attached Figure Description

[0041] Figure 1 The diagram shown is a half-sectional view of the water purification device described in this utility model.

[0042] Figure 2 The diagram shown is a half-section view of the water purification device described in this utility model from another perspective.

[0043] Figure 3 The diagram shown is a structural schematic of the aeration component in the water purification device of this utility model.

[0044] Figure 4 The image shown is a three-dimensional structural schematic diagram of the water purification device described in this utility model from one perspective.

[0045] Figure 5This is a three-dimensional structural diagram of the water purification device described in this utility model from another perspective.

[0046] Figure 6 The diagram shown is a structural schematic of the static filter media in the water purification device of this utility model.

[0047] Figure 7 The diagram shown is a structural schematic of the filter plate in the water purification device of this utility model.

[0048] Figure 8 The diagram shown is a structural schematic of the filter diversion component in the water purification device of this utility model.

[0049] Figure 9 The diagram shown is a structural schematic of the fluidized bed packing material in the water purification device of this utility model.

[0050] Figure 10 The diagram shown is a structural schematic of the top cover of the water purification device described in this utility model.

[0051] Explanation of reference numerals in the attached figures

[0052] 100 Enclosed chamber, 101 Partition, 102 Fluidized bed packing, 1021 Hollowed-out protective shell, 1022 Bacterial cultivation packing, 103 Filter plate, 1031 Support, 1032 Third through hole, 104 Inlet, 105 Outlet, 106 First through hole, 107 Sewage discharge hole, 108 Static filter media, 1081 Second through hole, 1082 Spherical bio-cotton, 109 Top cover, 110 Aeration assembly, 1101 Air inlet, 1102 Gas diffuser, 1103 Upper and lower horizontal clamps, 111 Filter diverter, 1111 Fourth through hole, 112 Limiting section, 113 Limiting component, 114 Fifth through hole, a First arrow, b Second arrow. Detailed Implementation

[0053] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0054] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] See Figures 1-10 This embodiment provides a biological water purification device for fish farming. The water purification device includes a closed chamber 100 with an openable top. A partition 101 is formed inside the closed chamber 100. The partition 101 is used to divide the space inside the closed chamber 100 into a horizontally adjacent filtration zone and an outlet zone. The bottoms of the filtration zone and the outlet zone are fluidly connected. The filtration zone is provided with a plurality of fluidized bed packing materials 102, an aeration assembly 110 for driving the fluidized bed packing materials 102 to move in the fluid, and a filter plate 103. The filter plate 103 is used to limit the filter material in the filtration zone and is located at the bottom of the filtration zone. The aeration assembly 110 includes upper and lower horizontal clamping plates 1103 and a gas diffuser 1102 detachably disposed between the upper and lower horizontal clamping plates. An inlet 104 is formed on the side wall of the filtration zone. An outlet 105 is formed on the side wall of the outlet zone. When the biological water purification device for fish farming purifies the water for fish farming, the aeration component 110 drives the fluidized bed packing 102 in the water to move, so that the fluidized bed packing 102 has more sufficient contact with the water for fish farming and provides oxygen, promotes the growth of bacteria on the surface of the fluidized bed packing 102, and improves the biochemical filtration efficiency of the device.

[0057] In a specific embodiment, such as Figures 1-2 As shown, the two sides of the partition 101 are fixed to the two different inner walls of the closed chamber 100, and a gap is formed between its bottom end and the inner bottom plate of the closed chamber 100.

[0058] In a more specific embodiment, such as Figures 1-2As shown, the height of the gap is 4–6 cm. The height of the gap can be 4–5 cm or 5–6 cm.

[0059] In a specific embodiment, such as Figure 2 and 5 As shown, a drain hole 107 is formed on the side wall of the closed chamber 100 of the filtration zone.

[0060] In a more specific embodiment, such as Figure 2 and 5 As shown, the drain hole 107 is located on the side wall between the filter plate 103 and the bottom plate of the closed chamber 100. The drain pipe is located between the filter plate 103 and the bottom plate of the closed chamber 100 so that large particles of impurities that still remain after passing through the filtration zone settle and are discharged from the fish pond water purification device through the drain hole. The large particles of impurities include biological feces, feed, fallen leaves, and other impurities with larger particle sizes.

[0061] In a specific embodiment, such as Figures 1-3 As shown, the upper and lower horizontal clamping plates 1103 are provided with a detachable connection structure for detachably connecting the gas diffuser 1102.

[0062] In a more specific embodiment, such as Figures 1-3 As shown, the detachable connection structure is one or more of hooks, buckles, and clamps. The gas diffuser 1102 can be disassembled and cleaned when it reaches the end of its service life or when its vent is blocked by impurities; the operation is convenient. In a... Figures 1-3 In the specific embodiment shown, the upper and lower horizontal clamping plates 1103 are formed with snap-fit ​​connections for limiting the gas diffuser 1102. In a more specific embodiment, such as Figures 1-3 As shown, the upper and lower horizontal clamping plates 1103 include an upper clamping plate and a lower clamping plate, and the upper clamping plate is provided with an air inlet 1101 for connecting an external air supply pipe.

[0063] In a more specific embodiment, such as Figures 1-3 As shown, the upper and lower horizontal clamping plates 1103 partially cover the cross-section of the filter area. The dimensions of the upper and lower horizontal clamping plates 1103 match the cross-section of the filter area, allowing them to be placed horizontally within the filter area while leaving space for the output airflow.

[0064] In a further embodiment, such as Figures 1-3 As shown, the upper and lower horizontal clamps 1103 are elongated strips, with their length matching the length of the cross-section of the filter zone and their width being less than the width of the cross-section of the filter zone.

[0065] In a like Figures 1-3In the specific embodiment shown, the upper and lower horizontal clamps 1103 are elongated strips, with both ends extending from one side wall of the filtration zone to the other side wall. The strips do not contact the other two side walls of the filtration zone, allowing gas to exit from both sides of the upper and lower horizontal clamps 1103, with the gas flow direction as shown. Figure 1 As indicated by the first arrow a, it drives the fluidized bed packing 102 as follows: Figure 1 The movement is in the direction of the second arrow b.

[0066] In a more specific embodiment, such as Figures 1-3 As shown, the upper and lower clamping plates 1103 are stainless steel plates. The material of the upper and lower clamping plates can be chosen arbitrarily, as long as it allows the aeration component 110 to sink to the bottom of the water without polluting the water quality. For example, it can be one or more of plastic, ceramic, and metal.

[0067] In a more specific embodiment, such as Figure 4 As shown, a first through hole 106 for the passage of an air supply pipe is formed on the side wall of the enclosed chamber 100 of the filtration zone. In a... Figure 4 In the specific embodiment shown, the first through hole 106 is positioned closer to the top of the closed chamber 100 than the inlet 104, preventing the input fishpond wastewater from leaking out through the first through hole and improving the environmental cleanliness of the water purification process. In a specific embodiment, such as Figures 1-3 As shown, the gas diffuser 1102 has a porous structure. The gas diffuser 1102 allows gas input through the inlet 1101 to exit through the outlet, resulting in a finer airflow. The airflow direction can be adjusted according to the outlet direction, further increasing dissolved oxygen. Simultaneously, it allows the aeration assembly 110 to drive the fluidized bed packing 102 more stably and uniformly, facilitating bacterial cultivation in the fluidized bed packing and improving biochemical filtration efficiency. Furthermore, the porous structure is less prone to complete blockage by impurities in the fishpond wastewater, resulting in a longer service life.

[0068] In a further embodiment, such as Figures 1-3 As shown, the gas diffuser 1102 is a porous flexible diffuser.

[0069] In a more specific embodiment, such as Figures 1-3 As shown, the gas diffuser 1102 is selected from one or more of cotton strips and sponges. The cotton strips and sponges have many and dense pores, which makes the output airflow finer, which is more conducive to increasing dissolved oxygen and driving the fluidized bed packing 102 to move stably.

[0070] In a specific embodiment, such as Figure 4 As shown, the water inlet 104 is located near the top of the enclosed chamber 100.

[0071] In a specific embodiment, such as Figure 4 As shown, the diameter of the inlet 104 is 25-35 mm. However, the diameter of the inlet 104 can be 25-26 mm, 26-27 mm, 27-28 mm, 28-29 mm, 29-30 mm, 30-31 mm, 31-32 mm, 32-33 mm, 33-34 mm, or 34-35 mm. In a... Figure 4 In the specific embodiment shown, the diameter of the inlet 104 is 32mm.

[0072] In a specific embodiment, such as Figures 4-5 As shown, the aperture of the outlet 105 is 45-55mm. The aperture of the outlet 105 can be 45-46mm, 46-47mm, 47-48mm, 48-49mm, 49-50mm, 50-51mm, 51-52mm, 52-53mm, 53-54mm, or 54-55mm. Figures 4-5 In the specific embodiment shown, the diameter of the outlet 105 is 50mm.

[0073] In a specific embodiment, such as Figures 4-5 As shown, the water outlet 105 is located near the top of the closed chamber.

[0074] In a specific embodiment, such as Figures 1-2 As shown, the ratio of the volume of the fluidized bed packing 102 to the volume of the filtration zone is (0.3-0.7):1. For example, the ratio of the volume of the fluidized bed packing 102 to the volume of the filtration zone can be (0.3-0.4):1, (0.4-0.5):1, (0.5-0.6):1, or (0.6-0.7):1. In a... Figures 1-2 In the specific embodiment shown, the ratio of the volume of the fluidized bed packing 102 to the volume of the filtration zone is 0.5:1. This ensures that the amount of fluidized bed packing 102 is sufficient to guarantee biochemical filtration efficiency while also providing enough space for movement for the fluidized bed packing 102.

[0075] In a specific embodiment, such as Figures 1-2 As shown in Figure 6, a static filter media 108 is also provided between the fluidized bed packing 102 and the filter plate 103, and the aeration assembly 110 is located between the static filter media 108 and the fluidized bed packing 102. The static filter media 108 further performs physical and biological filtration on the fishpond wastewater after the biological filtration by the fluidized bed packing 102.

[0076] In a specific embodiment, such as Figures 1-2As shown in Figure 6, the static filter material 108 has a sandwich-filled structure. The upper and lower horizontal clamping plates of the sandwich-filled structure are provided with several second through holes 1081. The filling layer of the sandwich-filled structure is composed of multiple interconnected spherical bio-cotton 1082. In a... Figures 1-2 In the specific embodiment shown in Figure 6, the diameter of the second through hole 1081 is 5-7 mm. The second through hole 1081 allows the fishpond wastewater after biological filtration by the fluidized bed packing 102 to flow evenly and slowly through the static filter media 108. Multiple interconnected spherical bio-cotton particles perform preliminary filtration of large particulate impurities, while their structure better suits the physiological habits of nitrifying bacteria, facilitating dissolved oxygen exchange. Furthermore, as shown in Figure 6... Figures 1-2 In the specific embodiment shown in Figure 6, the static filter material 108 is a square array of macadamia gourd, and its cross-sectional dimensions are consistent with the cross-sectional dimensions of the filtration zone. The static filter material 108 is fixed to the side of the filter plate 103 away from the bottom of the closed chamber 100 by a strap, which is easier to disassemble, replace and clean than mineral filter materials.

[0077] It should be noted that the static filter material 108 can also be selected from volcanic rock, ceramic rings, sponge, etc., as long as it can perform further filtration and remain static during the filtration process.

[0078] In a more specific embodiment, such as Figures 1-2 As shown in Figure 6, the static filter media 108 supports and confines the fluidized bed packing 102 to the filtration zone above the static filter media 108.

[0079] In a specific embodiment, such as Figures 1-2 As shown in Figure 7, the filter plate 103 is also provided with a support portion 1031 protruding downwards, and the support portion 1031 makes the filter plate 103 and the bottom plate of the closed chamber 100 have a gap.

[0080] In a more specific embodiment, such as Figures 1-2 As shown in Figure 7, the distance between the filter plate 103 and the bottom plate of the closed chamber 100 is 4-10 cm. For example, the distance between the filter plate 103 and the bottom of the closed chamber 100 can be 4-5 cm, 5-6 cm, 6-7 cm, 7-8 cm, 8-9 cm, or 9-10 cm. In a... Figures 1-2 In the specific embodiment shown in Figure 7, the distance is 5 cm. The support 1031 provides a sedimentation space for the fish farming water after filtration, allowing large particles of impurities time and space to settle at the bottom of the enclosed chamber 100.

[0081] In a specific embodiment, such as Figures 1-2 As shown in Figure 7, the filter plate 103 also has a plurality of third through holes 1032.

[0082] In a more specific embodiment, such as Figures 1-2 As shown in Figure 7, the diameter of the third through hole 1032 is 6-10 mm. For example, the diameter of the third through hole 1032 can be 6-7 mm, 7-8 mm, 8-9 mm, or 9-10 mm. In a... Figures 1-2 In the specific embodiment shown in Figure 7, the diameter of the third through-hole 1032 is 7 mm. The third through-hole 1032 allows large particulate impurities remaining after filtration to settle naturally.

[0083] In a specific embodiment, such as Figures 1-2 As shown in Figure 8, the filtration zone is also provided with a filter diversion component 111, which is located between the water inlet 104 and the fluidized bed packing 102. The bottom of the filter diversion component 111 has a plurality of fourth through holes 1111.

[0084] In a more specific embodiment, such as Figures 1-2 As shown in Figure 8, the filter diverter is plate-shaped or groove-shaped. In a... Figures 1-2 In the specific embodiment shown in Figure 8, the filter diversion component is trough-shaped. The filter diversion component 111 performs preliminary filtration of the fishpond wastewater flowing into the closed chamber 100, and physically filters larger particles of impurities through the fourth through hole 1111. At the same time, after passing through the fourth through hole 1111, the fishpond wastewater enters the area where the fluidized bed packing 102 is located in a uniform and fine flow state through the holes, increasing the dissolved oxygen in the water, which is more conducive to the cultivation of bacteria in the fluidized bed packing 102 and improving the efficiency of biological filtration.

[0085] In a more specific embodiment, such as Figures 1-2 As shown in Figure 8, the diameter of the fourth through hole 1111 is 5-8 mm. For example, the diameter of the fourth through hole 1111 can be 5-6 mm, 6-7 mm, or 7-8 mm. In a... Figures 1-2 In the specific embodiment shown in Figure 8, the diameter of the fourth through hole 1111 is 8 mm.

[0086] In a more specific embodiment, such as Figures 1-2 As shown in Figure 8, a first filter media is further provided between the filter diversion component 111 and the inlet 104. The first filter media is selected from one or more of filter cotton, activated carbon, and sponge. The first filter media performs physical filtration of the fishpond wastewater.

[0087] In a more specific embodiment, such as Figures 1-2 As shown, a limiting section 112 for supporting and limiting the filter diverter 111 is formed on the side wall of the partition 101 and / or the closed chamber 100 of the filter area.

[0088] In a specific embodiment, such as Figures 1-2As shown, the water outlet area is equipped with a germicidal lamp and a limiting member 113 for limiting the germicidal lamp. The germicidal lamp includes a lamp tube and a power cord.

[0089] In a more specific embodiment, such as Figures 1-2 As shown in Figure 5, a fifth through hole 114 is also formed on the side wall of the closed chamber 100 in the water outlet area, through which the power cord of the germicidal lamp passes. The fifth through hole 114 is located above the water outlet 105. The purified fishpond wastewater will not flow out from the fifth through hole 114, ensuring the cleanliness of the water purification environment and the efficiency of water purification.

[0090] In a specific embodiment, such as Figures 1-2 As shown in Figure 9, the fluidized bed packing 102 is selected from one or more of the following: K1 type packing, K2 type packing, K3 type packing, K4 type packing, K5 type packing, QY-PE02 packing, QY-PE03 packing, QY-PE04 packing, QY-PE08 packing, Madouyoujunku 7PLUS packing, and Madouyoujunku 5S packing. In a... Figures 1-2 In the embodiment shown in Figure 9, the fluidized bed packing 102 is the Macadouyoujunku 7PLUS packing. The Macadouyoujunku 7PLUS packing includes a perforated protective shell 1021 and a culture filler 1022.

[0091] In a more specific embodiment, the enclosed chamber 100 further includes a water supply pipe that is in fluid communication with the water inlet 104 and extends into the enclosed chamber 100. The water supply pipe connects to the fish pond, and in one specific embodiment, a water pump acts on the water supply pipe to control the flow rate of sewage from the fish pond into the enclosed chamber 100.

[0092] It should be noted that the diameter of the water supply pipe matches the aperture of the inlet 104, and the power of the water pump can be arbitrarily selected according to the usage requirements, as long as the water entering the closed chamber does not flow too fast and overflow the partition and directly enter the outlet area, and the sewage from the fish pond can constantly cover the fluidized bed packing 102.

[0093] In a specific embodiment, such as Figures 1-2 As shown in Figures 4 and 5, the enclosed chamber 100 is rectangular.

[0094] In a specific embodiment, such as Figures 1-2 As shown in Figures 4 and 5, the dimensions of the enclosed chamber 100 are (300-500) mm * (500-700) mm * (1300-1800) mm. (300-500) mm is the width of the enclosed chamber 100, (500-700) mm is the length of the enclosed chamber 100, and (1300-1800) mm is the height of the enclosed chamber 100.

[0095] In a like Figures 1-2 In the specific embodiments shown in 4 to 5, the dimensions of the enclosed chamber 100 are 360mm*630mm*1600mm.

[0096] In a more specific embodiment, the gas supply pipe is connected to an external air pump. In a similar embodiment... Figures 1-2 In the specific embodiments shown in 4-5, the efficiency of the air pump is 40 L / min. It should be noted that the efficiency of the air pump is matched with the size of the closed chamber 100, and it can drive the fishpond wastewater in the filtration zone, thereby causing the fluidized bed packing 102 to move.

[0097] In a specific embodiment, such as Figure 1 , 2 As shown in Figures 5 and 10, the enclosed chamber 100 also includes a top cover 109. The top cover 109 prevents external impurities from falling into the enclosed chamber, ensuring the water purification efficiency of the device.

[0098] In a like Figures 1-10 The specific operation method of the biological water purification device for fish farming includes the following steps:

[0099] 1) In the filtration zone of the closed chamber 100, filter plate 103, static filter media 108, aeration component 110, fluidized bed packing 102 and filter diverter 111 are placed in sequence. The filter diverter 111 is limited below the outlet by the limiting section 112. The germicidal lamp is fixed in the outlet zone by the limiting component 113. The power cord of the germicidal lamp passes through the fifth through hole 114 and is connected to an external power source. An air pump is connected to the air supply pipe, which enters the closed chamber 100 through the first through hole 106 and is connected to the air inlet of the aeration component 110. A matching drain pipe is connected to the drain hole 107. The drain pipe is equipped with a drain valve and a sludge pump.

[0100] 2) Start the water pump and send the fish pond wastewater through the water inlet 104 into the filtration area inside the closed chamber 100 via the water delivery pipe;

[0101] 3) Once the water level in the filtration zone has submerged the fluidized bed packing 102, start the air pump. The air pump has a power of 40 L / min, causing the fluidized bed packing 102 to tumble and move as if... Figure 1 The movement in the direction of the second arrow b results in a fluidized state;

[0102] 4) The fish pond wastewater first passes through the first filter media and the filter diversion component 111 for physical filtration, which initially separates large particulate impurities. At the same time, the fish pond wastewater flows down in the form of dripping through the fourth through hole.

[0103] 5) The fishpond wastewater passing through the filter diversion component 111 comes into full contact with the fluidized bed packing material 102 under the action of the air pump, and performs biological filtration.

[0104] 6) The fish pond wastewater filtered by the fluidized bed packing 102 flows into the static filter media 108 for further filtration, and then flows into the space between the filter plate 103 and the bottom plate of the closed chamber 100 through the filter plate 103.

[0105] 7) Large particulate impurities in the water slowly settle due to gravity in the space described in step 6). The purified water flows into the outlet area through the partition 101 and the bottom plate of the closed chamber 100, and the water level in the outlet area gradually rises over time.

[0106] 8) The outlet 105 is connected to a matching pipe and equipped with a valve. When the water level in the outlet area rises to the height of the outlet 105, the sterilization lamp is activated to sterilize the purified and filtered water. Then the valve is opened and the purified and filtered water flows back to the fish pond through the pipe.

[0107] 9) When the large particles of impurities deposited at the bottom of the closed chamber 100 reach a certain thickness, open the drain valve and the sludge pump to extract the large particles of impurities from the closed chamber 100; after there are no more large particles of impurities deposited at the bottom, close the drain valve and the sludge pump.

[0108] This invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0109] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A biological water purification device for fish farming, characterized in that, The water purifying device comprises a top openable closed bin (100), a partition plate (101) is formed in the closed bin (100), the partition plate (101) is used for separating the space in the closed bin into a filtering area and a water outlet area arranged adjacent in horizontal direction, and the filtering area and the water outlet area are in fluid communication at the bottom; The filtering area is provided with a plurality of fluidized bed fillers (102), an aeration assembly (110) for driving the fluidized bed fillers (102) to move in fluid, and a filter plate (103); The filter plate (103) is used for limiting the filter material of the filtering area and is arranged at the bottom of the filtering area; The aeration assembly (110) comprises upper and lower horizontal clamps (1103) and a gas diffusion member (1102) detachably arranged between the upper and lower horizontal clamps; The side wall of the filtering area is formed with a water inlet (104), and the side wall of the water outlet area is formed with a water outlet (105).

2. The apparatus of claim 1, wherein, The partition plate (101) is fixed to two different inner side walls of the closed bin, and a gap is formed between the bottom end of the partition plate (101) and the inner bottom plate of the closed bin; And / or, a sewage discharge hole (107) is formed in the side wall of the filtering area close to the bottom.

3. The apparatus of claim 2, wherein The height of the gap is 4-6 cm; And / or, the sewage discharge hole (107) is arranged on the side wall between the filter plate (103) and the bottom plate of the closed bin (100).

4. The apparatus of claim 1, wherein, The upper and lower horizontal clamps (1103) are provided with a detachable connection structure for detachably connecting the gas diffusion member (1102); And / or, the gas diffusion member (1102) is formed with a porous structure.

5. The apparatus of claim 4, wherein, The gas diffusion member (1102) is selected from one or more of cotton and sponge; And / or, the detachable connection structure is one or more of a hook, a buckle and a clamp; And / or, the upper and lower horizontal clamps (1103) comprise an upper clamp and a lower clamp, and the upper clamp is provided with a gas inlet (1101) of an external gas supply pipe; And / or, the upper and lower horizontal clamps (1103) partially cover the cross section of the filtering area.

6. The apparatus of claim 1, wherein, The aperture of the water inlet (104) is 25-35 mm; And / or, the aperture of the water outlet (105) is 45-55 mm; And / or, the water outlet (105) is arranged close to the top of the closed bin (100).

7. The apparatus of claim 1, wherein, The ratio of the volume of the fluidized bed filler (102) to the volume of the filtering area is (0.3-0.7):1; And / or, a static filter material (108) is further arranged between the fluidized bed filler (102) and the filter plate (103), and the aeration assembly (110) is arranged between the static filter material (108) and the fluidized bed filler (102); And / or, the filter plate (103) is further provided with a support portion (1031) protruding downward, and the support portion (1031) enables the filter plate (103) to be arranged in a gap with the bottom plate of the closed bin (100); And / or, the filter plate (103) is further formed with a plurality of third through holes (1032).

8. The apparatus of claim 7, wherein, The static filter material (108) supports and limits the fluidized bed filler (102) in the filtering area above the static filter material (108); And / or, the filter plate (103) is arranged in a gap with the bottom plate of the closed bin (100) at a distance of 4-10 cm. And / or, the third through hole (1032) has a diameter of 6-10 mm.

9. The apparatus of claim 1, wherein, The filtering area is further provided with a filtering shunt (111) arranged between the water inlet (104) and the fluidized bed filler (102), and the bottom of the filtering shunt (111) is formed with a plurality of fourth through holes (1111); And / or, the water outlet area is provided with a sterilization lamp and a limiting piece (113) for limiting the sterilization lamp, and the sterilization lamp comprises a lamp tube and a power line.

10. The apparatus of claim 9, wherein, The fourth through hole (1111) has a diameter of 5-8 mm; And / or, a first filter material is further arranged between the filtering shunt (111) and the water inlet (104); And / or, the limiting section (112) for supporting and limiting the filtering shunt (111) is protruded on the side wall of the closed bin (100) of the filter area and / or the partition plate (101); And / or, the fifth through hole (114) for the power line of the sterilization lamp is further formed on the side wall of the closed bin (100) of the water outlet area, and the fifth through hole (114) is arranged above the water outlet (105).

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