Nitrite removing and filtering equipment for aquaculture

Abstract

The invention discloses nitrite removing and filtering equipment for aquaculture, and relates to the technical field of filtering. According to the present invention, after the agent is mixed with water, the agent is directly filtered, such that the reaction time of the agent and nitrite in the water is short, the nitrite in the water does not completely react during the filtration so as to become precipitate, and the nitrite removal effect is affected; the chemical is guided into the gap between the outer blocking cylinder and the inner blocking cylinder through the empty groove in the bottom of the inner blocking cylinder, so that the chemical and water are accumulated in the gap, the reaction time of the chemical and nitrite in the water is guaranteed before filtering treatment, and compared with direct filtering after the chemical and water are mixed, the reaction time of the chemical and nitrite in the water is short; the nitrite in the water does not fully react and becomes precipitate during filtering, so that the problem that the removal effect of the nitrite is reduced due to the fact that part of the nitrite still exists in the water is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of filtration, in particular to a nitrite removal filtration device for aquaculture. Background Art

[0002] In the northern inland areas, due to the arid climate and lack of abundant surface water resources, groundwater resources are often needed as a supplementary water source for aquaculture when conducting fishery production. Fishery production in some areas is even completely dependent on groundwater resources for fishery production water. Groundwater resources often contain high concentrations of nitrite. In the process of fishery production, high concentrations of nitrite have a significant impact on the production of aquatic economic animals, such as decreased appetite, decreased survival rate, juvenile stunted development and adult gonadal development retardation, etc. A series of negative responses, therefore, it is very necessary to develop a fishery production equipment that can effectively remove nitrite from water. Nitrite can be removed by various methods such as physical, chemical and biological methods. Among them, the chemical method is to add some chemical agents to the water body to make nitrite react with the agent to form a precipitate, and then remove it from the water body by precipitation separation. The most common agent is calcium hydroxide, which can react with nitrite to form insoluble calcium nitrite precipitate, and then remove the precipitate by filtration to achieve the removal of nitrite from the water body.

[0003] When the agent reacts with nitrite in water, the agent and water are mixed and then filtered directly, resulting in a shorter reaction time between the agent and nitrite in water. During filtration, the nitrite in the water does not fully react to become precipitate, affecting the nitrite removal effect. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A nitrite removal and filtering device for aquaculture, comprising:

[0006] A frame, wherein a medicine box is installed inside the frame, and a liquid pump is fixedly installed inside the frame;

[0007] A filter tank is installed on the top of the frame and is used to perform preliminary filtration on the aquaculture water;

[0008] A filter box is installed inside the frame, and a connecting pipe is installed on the top of the filter box, and the filter box is connected to the filter tank through the connecting pipe;

[0009] A spraying mechanism is installed inside the filter box, and a conduit is fixedly installed at the bottom of the spraying mechanism, and one end of the conduit away from the spraying mechanism is connected to the liquid outlet end of the liquid pump;

[0010] The filter box is provided with an inner retaining cylinder fixedly mounted on the inner wall of the filter box, and the inner retaining cylinder is located on the outside of the spraying mechanism, and the bottom of the outer side of the inner retaining cylinder is evenly provided with empty grooves, and an outer retaining cylinder is mounted inside the filter box, and the upper and lower ends of the outer retaining cylinder are respectively fixedly connected to the upper and lower sides of the inner wall of the filter box, and the top of the outer side of the outer retaining cylinder is evenly provided with notches, and the outer retaining cylinder cooperates with the inner retaining cylinder, and after the medicine and water are mixed, they are introduced into the gap between the outer retaining cylinder and the inner retaining cylinder through the empty groove at the bottom of the inner retaining cylinder, so that the medicine and water accumulate in the gap, and the reaction time of nitrite and medicine in the water is guaranteed before filtering. Compared with filtering directly after the medicine and water are mixed, the reaction time of the medicine and nitrite in the water is shorter, and the nitrite in the water is reduced during filtration. There is no sufficient reaction to form precipitation, which prevents some nitrite from still existing in the water, resulting in a decrease in the nitrite removal effect. The outer retaining tube is located on the outside of the inner retaining tube and there is a gap between the inner retaining tube, and the inner wall of the outer retaining tube and the outer side of the inner retaining tube are fixedly installed with an inner ring plate. The inner ring plates are close to each other and tilted downward at one end. While utilizing the space between the inner retaining tube and the outer retaining tube to provide time for the reagent to react with nitrite, the staggered inner ring plates cause the water flow path to become tortuous when the water level rises, so that the precipitation formed by the reaction is blocked by the inclined inner ring plate, and the auxiliary filter bag filters the formed precipitation. The inner ring plates are staggered and tilted downward on one side close to each other.

[0011] Preferably, a grille tube is fixedly installed inside the filter box, the grille tube is located outside the outer retaining tube, grille grooves are evenly opened on the outside of the grille tube, and filter bags are fixedly installed on the inner wall of the grille tube, and a drain pipe is fixedly installed on the outside of the filter box.

[0012] Preferably, the spraying mechanism includes a conical column, the outer diameter of the conical column gradually increases from top to bottom, and spraying grooves are evenly opened on the outer side of the conical column, and the spraying grooves are inclined downward from outside to inside, and a column groove is opened at the center position of the top of the conical column. By utilizing the inclination of the spraying groove, the agent is sprayed obliquely upward in the process of spraying the agent, and cooperates with the downward flowing water to form a counter-flow, so that the agent is fully diffused in the water, the mixed contact between the agent and water is improved, and the agent quickly reacts with nitrite to form a precipitate. At the same time, according to the hydraulic pressure of the agent in the column groove, the sliding plate is pushed to move upward with the compression spring under the restriction of the sliding column to open more spraying grooves. A connecting pipe is fixedly installed at the bottom of the conical column, and the connecting pipe is connected to the column groove of the conical column, and the bottom end of the connecting pipe is fixedly connected to one end of the conduit, and a top plate is fixedly installed on the top of the conical column.

[0013] The top end face of said sliding plate is fixedly mounted on the inner wall of said top plate, and said sliding plate is fixedly mounted on the bottom wall of said top plate, and said bottom wall of said sliding plate is fixedly mounted on the outer wall of said top plate, and said sliding plate is fixedly mounted on the

[0014] Preferably, the filter tank includes a tank body, support rings are fixedly installed at both ends of the outer side of the tank body, the tank body is fixedly connected to the frame body through the support rings, and a water inlet pipe is fixedly installed at one end of the tank body, an inner conduit is fixedly installed at the center position of the inner wall of the tank body, circular grooves are evenly opened on the top of the outer side of the inner conduit, and end cover plates are fixedly installed at both ends of the outer side of the inner conduit, a grille frame and a top arc cover are fixedly installed between the end cover plates, the grille frame is located on both sides of the top arc cover, and frame grooves are opened on both sides of the top arc cover, and there is space for filling activated carbon inside the grille frame.

[0015] The present invention provides a nitrite removal and filtering device for aquaculture. It has the following beneficial effects:

[0016] 1. The nitrite removal and filtration equipment for aquaculture is equipped with an outer baffle and an inner baffle. After the agent is mixed with water, it is introduced into the gap between the outer baffle and the inner baffle through the empty groove at the bottom of the inner baffle, so that the agent and water accumulate in the gap. The reaction time between the nitrite in the water and the agent is guaranteed before the filtration treatment. Compared with filtering directly after the agent and water are mixed, the reaction time between the agent and the nitrite in the water is shorter. During filtration, the nitrite in the water does not fully react and become precipitate, resulting in some nitrite still existing in the water, resulting in reduced nitrite removal effect.

[0017] 2. The nitrite removal and filtration equipment for aquaculture uses the inner ring plates that are tilted downward near one end to provide time for the reaction between the reagent and nitrite by utilizing the space between the inner and outer baffles. At the same time, the staggered inner ring plates cause the water flow path to become tortuous when the water level rises, so that the precipitate formed by the reaction is blocked by the tilted inner ring plates, and the auxiliary filter bag filters the formed precipitate.

[0018] 3. The nitrite removal and filtration equipment for aquaculture, through the tilt of the spray trough, makes the agent spray upward obliquely during the spraying process, cooperates with the downward flowing water to form a hedge, makes the agent fully diffuse in the water, improves the mixed contact between the agent and water, and makes the agent quickly react with nitrite to form precipitation. At the same time, according to the hydraulic pressure of the agent in the column slot, the sliding plate is pushed to move upward with the compression spring under the restriction of the sliding column to open more spray troughs.

[0019] 4. The nitrite removal and filtration equipment for aquaculture cooperates with the guide plate and the partition plate. When the chemical and water are hedged, the partition plate is used to separate the liquid to avoid mutual interference between the spray troughs. At the same time, the guide plate guides the water to the outlet position of the spray trough, assisting the spray trough to spray the chemical obliquely upward, thereby improving the hedge effect between water and chemical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a nitrite removal and filtration device for aquaculture according to the present invention;

[0021] Figure 2 This is a partial structural diagram of a nitrite removal and filtration device for aquaculture according to the present invention;

[0022] Figure 3 This is a partial structural anatomical diagram of a nitrite removal and filtration device for aquaculture according to the present invention;

[0023] Figure 4 This is a partial structural dissected side view of a nitrite removal and filtration device for aquaculture according to the present invention;

[0024] Figure 5 Schematic diagram of the structure of the spraying mechanism of the present invention;

[0025] Figure 6 This is a structural anatomical diagram of the spraying mechanism of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the filter tank of the present invention;

[0027] Figure 8 This is a structural anatomical diagram of the filter tank of the present invention;

[0028] Figure 9 It is a partial structural schematic diagram of the filter tank of the present invention.

[0029] In the figure: 1. frame; 2. filter tank; 3. filter box; 4. liquid pump; 5. medicine box; 6. connecting pipe; 7. drain pipe; 8. spray mechanism; 9. grille tube; 10. outer retaining tube; 11. conduit; 12. filter bag; 13. inner ring plate; 14. inner retaining tube; 21. water inlet pipe; 22. tank body; 23. support ring; 24. inner conduit; 25. end cover plate; 26. grille frame; 27. top arc cover; 81. connecting pipe; 82. tapered column; 83. guide plate; 84. top plate; 85. partition plate; 86. sliding column; 87. spring; 88. sliding plate. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The first embodiment, as Figures 1 to 4 As shown, the present invention provides a technical solution:

[0032] A nitrite removal and filtering device for aquaculture, comprising:

[0033] The frame 1 has a medicine box 5 installed inside the frame 1, and a liquid pump 4 is fixedly installed inside the frame 1;

[0034] The filter tank 2 is installed on the top of the frame 1 and is used to perform preliminary filtration on the aquaculture water;

[0035] The filter box 3 is installed inside the frame 1, and a connecting pipe 6 is installed on the top of the filter box 3, and the filter box 3 is connected to the filter tank 2 through the connecting pipe 6;

[0036] The spraying mechanism 8 is installed inside the filter box 3, and a conduit 11 is fixedly installed at the bottom of the spraying mechanism 8. The end of the conduit 11 away from the spraying mechanism 8 is connected to the liquid outlet end of the liquid pump 4;

[0037] The inner wall of the filter box 3 is fixedly installed with an inner barrier cylinder 14, which is located on the outside of the spraying mechanism 8, and the bottom of the outer side of the inner barrier cylinder 14 is evenly provided with empty grooves. In the process of introducing the filter box 3, the water is first restricted by the inner barrier cylinder 14, so that the water moves downward along the inner barrier cylinder 14, and in the process of movement, by cooperating with the spraying mechanism 8, the spraying mechanism 8 mixes the medicine with water, so that the nitrite in the water reacts with the medicine to generate precipitation. After the medicine and water are mixed, the inner barrier cylinder 14 is led out through the empty groove at the bottom outside the inner barrier cylinder 14 and enters the space between the inner barrier cylinder 14 and the outer barrier cylinder 10, so that the medicine and water accumulate between the outer barrier cylinder 10 and the inner barrier cylinder 14. The outer barrier cylinder 10 is installed inside the filter box 3, and the upper and lower ends of the outer barrier cylinder 10 are respectively connected to The upper and lower sides of the inner wall of the filter box 3 are fixedly connected, and the top of the outer side of the outer retaining tube 10 is evenly provided with a notch. The outer retaining tube 10 is located on the outside of the inner retaining tube 14 and there is a gap between the outer retaining tube 10 and the inner retaining tube 14, so that the water and the agent have sufficient reaction time before the filtration process. At the same time, during the accumulation process, the liquid level gradually rises, and the liquid passes between the inner ring plates 13, and is finally guided out of the notch at the top of the outer side of the outer retaining tube 10 and enters the gap between the grille tube 9 and the outer retaining tube 10. In the process of the water mixed sediment passing through the grille tube 9, the sediment in the water is filtered by the filter bag 12 inside the grille tube 9, and the inner wall of the outer retaining tube 10 and the outer side of the inner retaining tube 14 are fixedly installed with an inner ring plate 13, and the inner ring plates 13 are staggered and the side close to each other is tilted downward.

[0038] A grille tube 9 is fixedly installed inside the filter box 3. The grille tube 9 is located outside the outer retaining tube 10. Grille grooves are evenly opened on the outside of the grille tube 9, and a filter bag 12 is fixedly installed on the inner wall of the grille tube 9. A drain pipe 7 is fixedly installed on the outside of the filter box 3.

[0039] The second embodiment, based on the first embodiment, see Figures 5 and 6 As shown, the spraying mechanism 8 includes a conical column 82, the outer diameter of the conical column 82 gradually increases from top to bottom, and spraying grooves are evenly opened on the outside of the conical column 82, and the spraying grooves are inclined downward from outside to inside. A column groove is opened at the center position of the top of the conical column 82, and a connecting pipe 81 is fixedly installed at the bottom of the conical column 82. The liquid pump 4 drives the medicine inside the medicine box 5, so that the medicine is pressurized by the liquid pump 4 and introduced into the connecting pipe 81 by the conduit 11, and the medicine is introduced into the column groove of the conical column 82 through the connecting pipe 81. Through the communication between the column groove and the spraying groove, the medicine is sprayed out through the spraying groove and mixed with water. The connecting pipe 81 is connected to the column groove of the conical column 82, and the bottom end of the connecting pipe 81 is fixedly connected to one end of the conduit 11, and a top plate 84 is fixedly installed on the top of the conical column 82.

[0040] The inner wall of the top plate 84 is slidably mounted with a slide post 86, and the bottom end of the slide post 86 is fixedly mounted with a slide plate 88. The bottom of the slide plate 88 is an arc surface with a center position that is concave inward, and the outer side of the slide plate 88 is slidably adapted to the column groove of the tapered column 82. A spring 87 is fixedly mounted between the slide plate 88 and the top plate 84, and a partition plate 85 is fixedly mounted on the outer side of the tapered column 82. During the spraying process, the spray tank is tilted upward from the inside to the outside, so that the medicine is sprayed upward when it is sprayed, and forms a counteraction with the water in conjunction with the downward flow of water. The partition plate 85 and the guide plate 83 are used to separate the downward-flowing water. At the same time, the water is guided to the spray trough position by the inclination of the guide plate 83 to improve the mixing effect. The partition plates 85 are evenly installed along the center position of the conical column 82, and the partition plates 85 are located between the spray troughs. The side of the partition plate 85 away from the conical column 82 is fixedly connected to the inner wall of the inner baffle 14. The guide plates 83 are fixedly installed on both sides of the partition plate 85, and the side of the guide plate 83 away from the partition plate 85 is inclined downward.

[0041] The third embodiment, based on the first and second embodiments, see Figures 7 to 9 As shown, the filter tank 2 includes a tank body 22, and support rings 23 are fixedly installed at both ends of the outer side of the tank body 22. The tank body 22 is fixedly connected to the frame body 1 through the support ring 23, and a water inlet pipe 21 is fixedly installed at one end of the tank body 22. The center position of the inner wall of the tank body 22 is fixedly installed with an inner guide tube 24, which is connected with the pipeline through the water inlet pipe 21, so that the aquaculture water is introduced into the interior of the tank body 22 from the water inlet pipe 21. In the process of introducing the interior, the water first enters the inner guide tube 24, and passes through the circular grooves uniformly opened on the top of the inner guide tube 24, so that the water enters the interior of the top arc cover 27 from the circular groove, and passes through the frame grooves on both sides of the top arc cover 27, so that the water is discharged in the inner guide tube 24. Under the gravity of , it passes through the frame groove and enters the grille frame 26. Circular grooves are evenly opened on the top of the outer side of the inner conduit 24, and end cover plates 25 are fixedly installed at both ends of the outer side of the inner conduit 24. A grille frame 26 and a top arc cover 27 are fixedly installed between the end cover plates 25. The grille frame 26 is located on both sides of the top arc cover 27. The activated carbon adsorption material filled in the grille frame 26 is used to adsorb impurities in the water, so that the water flows downward according to its own gravity during the adsorption process, and the water is introduced into the filter box 3 through the connecting pipe 6. Frame grooves are opened on both sides of the top arc cover 27, and there is space for filling activated carbon inside the grille frame 26.

[0042] When in use, the aquaculture water pipeline is connected to the filter tank 2 and the drain pipe 7. The water first enters the filter tank 2, and the solid impurities in the water are filtered by the filter tank 2. The filtered water is introduced into the filter box through the connecting pipe 6. The liquid pump 4 drives the agent in the agent box 5 to enter the spraying mechanism 8 along the conduit 11. The agent is sprayed into the water through the spraying mechanism 8, so that the nitrite in the water reacts with the agent to form a precipitate, and then the nitrite is removed from the discharged water through filtration.

[0043] In the filter tank 2, the water is connected to the pipeline through the water inlet pipe 21, so that the aquaculture water is introduced into the interior of the tank body 22 through the water inlet pipe 21. During the process of being introduced into the interior, the water first enters the inner conduit 24, and passes through the circular grooves evenly opened on the top of the inner conduit 24, so that the water enters the interior of the top arc cover 27 from the circular grooves. Through the frame grooves on both sides of the top arc cover 27, the water passes through the frame grooves under its own gravity and enters the grille frame 26. The activated carbon adsorption material filled in the grille frame 26 is used to adsorb impurities in the water, so that the water flows downward according to its own gravity during the adsorption process, and the water is introduced into the filter box 3 through the connecting pipe 6.

[0044] In the process of introducing the filter box 3, the water is first restricted by the inner barrier tube 14, so that the water moves downward along the inner barrier tube 14, and in the process of movement, the spraying mechanism 8 is coordinated with the spraying mechanism 8 to mix the agent with the water, so that the nitrite in the water reacts with the agent to generate a precipitate. After the agent and water are mixed, the inner barrier tube 14 is led out through the empty groove at the bottom of the outer side of the inner barrier tube 14 and enters the space between the inner barrier tube 14 and the outer barrier tube 10, so that the agent and water accumulate between the outer barrier tube 10 and the inner barrier tube 14. Before filtering, the water and the agent have sufficient reaction time. At the same time, in the process of accumulation, the liquid level gradually rises, and the liquid passes between the inner ring plate 13, and is finally led out by the missing groove at the top of the outer barrier tube 10 to enter the gap between the grille tube 9 and the outer barrier tube 10. In the process of the water mixed sediment passing through the grille tube 9, the sediment in the water is filtered by the filter bag 12 inside the grille tube 9.

[0045] In the spraying mechanism 8, the liquid pump 4 drives the medicine inside the medicine box 5, so that the medicine is pressurized by the liquid pump 4 and then introduced into the connecting pipe 81 by the conduit 11, and the medicine is introduced into the column groove of the conical column 82 through the connecting pipe 81. Through the connection between the column groove and the spraying groove, the medicine is sprayed out through the spraying groove and mixed with the water. At the same time, during the spraying process, the characteristic of the spraying groove tilting upward from the inside to the outside is utilized, so that the medicine is sprayed upward when spraying, and forms a counter-flow with the water in conjunction with the downward flow of water. At the same time, the partition plate 85 and the guide plate 83 are cooperated to separate the downward flowing water, and the water is guided to the spraying groove position through the tilt of the guide plate 83, thereby improving the mixing effect.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A nitrite removal and filtration device for aquaculture, characterized in that: include: A frame (1), a medicine box (5) is installed inside the frame (1), and a liquid pump (4) is fixedly installed inside the frame (1); A filter tank (2), the filter tank (2) is installed on the top of the frame (1), and the filter tank (2) is used to perform preliminary filtration on the aquaculture water; A filter box (3), the filter box (3) is installed inside the frame (1), and a connecting pipe (6) is installed on the top of the filter box (3), and the filter box (3) is connected to the filter tank (2) through the connecting pipe (6); A spraying mechanism (8), the spraying mechanism (8) is installed inside the filter box (3), and a conduit (11) is fixedly installed at the bottom of the spraying mechanism (8), and the end of the conduit (11) away from the spraying mechanism (8) is connected to the liquid outlet end of the liquid pump (4); An inner retaining tube (14) is fixedly installed on the inner wall of the filter box (3), and the inner retaining tube (14) is located on the outside of the spraying mechanism (8), and the bottom of the outer side of the inner retaining tube (14) is evenly provided with an empty groove. An outer retaining tube (10) is installed inside the filter box (3), and the upper and lower ends of the outer retaining tube (10) are respectively fixedly connected to the upper and lower sides of the inner wall of the filter box (3), and the top of the outer side of the outer retaining tube (10) is evenly provided with a missing groove. The outer retaining tube (10) is located on the outside of the inner retaining tube (14) and there is a gap between the outer retaining tube (10) and the inner wall of the outer retaining tube (10) and the outer side of the inner retaining tube (14) are fixedly installed with an inner ring plate (13), and the inner ring plates (13) are staggered and the sides close to each other are tilted downward.

2. The nitrite removal and filtering equipment for aquaculture according to claim 1, characterized in that: A grille cylinder (9) is fixedly installed inside the filter box (3), and the grille cylinder (9) is located outside the outer retaining cylinder (10). Grille slots are evenly opened on the outside of the grille cylinder (9), and a filter bag (12) is fixedly installed on the inner wall of the grille cylinder (9). A drain pipe (7) is fixedly installed on the outside of the filter box (3).

3. The nitrite removal and filtering equipment for aquaculture according to claim 2, characterized in that: The spraying mechanism (8) includes a conical column (82), the outer diameter of which gradually increases from top to bottom, and a spraying groove is evenly opened on the outer side of the conical column (82), and the spraying groove is inclined downward from the outside to the inside, and a column groove is opened at the center position of the top of the conical column (82).

4. The nitrite removal and filtering equipment for aquaculture according to claim 3, characterized in that: A connecting pipe (81) is fixedly installed at the bottom of the conical column (82), the connecting pipe (81) is communicated with the column groove of the conical column (82), and the bottom end of the connecting pipe (81) is fixedly connected to one end of the conduit (11), and a top plate (84) is fixedly installed at the top of the conical column (82).

5. The nitrite removal and filtering equipment for aquaculture according to claim 4, characterized in that: A sliding column (86) is slidably mounted on the inner wall of the top plate (84), and a sliding plate (88) is fixedly mounted on the bottom end of the sliding column (86). The bottom of the sliding plate (88) is an arc surface that is concave inward at the center position, and the outer side of the sliding plate (88) is slidably adapted to the column groove of the conical column (82). A spring (87) is fixedly mounted between the sliding plate (88) and the top plate (84).

6. The nitrite removal and filtering equipment for aquaculture according to claim 5, characterized in that: A partition plate (85) is fixedly installed on the outer side of the conical column (82), and the partition plate (85) is evenly installed along the center position of the conical column (82). The partition plate (85) is located between the spray tanks, and the side of the partition plate (85) away from the conical column (82) is fixedly connected to the inner wall of the inner stop cylinder (14).

7. The nitrite removal and filtering equipment for aquaculture according to claim 6, characterized in that: Guide plates (83) are fixedly mounted on both sides of the partition plate (85), and the side of the guide plate (83) away from the partition plate (85) is inclined downward.

8. The nitrite removal and filtering equipment for aquaculture according to claim 7, characterized in that: The filter tank (2) comprises a tank body (22), support rings (23) are fixedly mounted on both ends of the outer side of the tank body (22), the tank body (22) is fixedly connected to the frame (1) via the support rings (23), and a water inlet pipe (21) is fixedly mounted on one end of the tank body (22).

9. The nitrite removal and filtering equipment for aquaculture according to claim 8, characterized in that: An inner conduit (24) is fixedly mounted at the center of the inner wall of the tank body (22), circular grooves are evenly formed on the top of the outer side of the inner conduit (24), and end cover plates (25) are fixedly mounted at both ends of the outer side of the inner conduit (24), and a grille frame (26) and a top arc cover (27) are fixedly mounted between the end cover plates (25).

10. The nitrite removal and filtering equipment for aquaculture according to claim 9, characterized in that: The grille frame (26) is located on both sides of the top arc cover (27), and frame grooves are provided on both sides of the top arc cover (27), and there is a space inside the grille frame (26) for filling activated carbon.

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