MRS water purifying tank with planting layer and water and fertilizer circulating device

Abstract

The application discloses a MRS water purification tank body with a planting layer having a water and fertilizer circulation device, which comprises a tank body, a planting layer, a filtering layer, a purification layer, a water collecting layer, a drainage pipe and a water and fertilizer circulation device. The drainage pipe is partially located in the water collecting layer and partially extends out of the tank body. The water and fertilizer circulation device comprises a material box, a circulation pipe and a water pump. The material box is arranged on one side of the tank body, and the drainage pipe is connected to the material box. The material box is provided with a material cavity and a feeding opening communicated with the material cavity. The water pump is arranged in the material cavity. One end of the circulation pipe is connected to the water pump, and the other end of the circulation pipe extends to the top of the tank body and is located on one side of the planting layer. The MRS water purification tank body provided by the application can mix the fertilizer and the purified water collected by the water collecting layer, and then re-deliver the mixture to the planting layer at the top of the tank body through the water pump and the circulation pipe, so that the automatic circulation and utilization of the water and fertilizer are realized. Therefore, the utilization efficiency of water resources is improved, and the frequency and labor intensity of manual irrigation are reduced.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to an MRS water purification tank with a water and fertilizer circulation device in the planting layer. Background Technology

[0002] MRS (Microbial High-Efficiency Water Purification) technology is a novel wastewater treatment process that utilizes a bioreactor system constructed by combining microbial communities with sand to achieve highly efficient purification. Its core advantages include an eco-friendly design, low energy consumption, and ease of maintenance. The treated water meets the national Class A discharge standard. MRS technology uses microbial communities (such as aerobic and anaerobic bacteria) combined with sand to form a multi-layered bioreactor system, decomposing pollutants through microbial metabolism. Simultaneously, it incorporates plant-assisted purification to achieve highly efficient decomposition.

[0003] In related technologies, the top layer of the MRS water purification tank is typically a planting layer containing vegetation. The filtration and purification layers are located below the planting layer, with the inlet pipe connected to the filtration layer. Wastewater flows into the filtration layer and then permeates downwards layer by layer. The purified water does not come into contact with the vegetation. To promote vegetation growth, traditional methods often involve manual irrigation or connecting to a separate irrigation system, which undoubtedly increases the complexity of the system structure and raises equipment costs.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] To solve one of the above-mentioned technical problems, this utility model provides an MRS water purification tank with a water and fertilizer circulation device in the planting layer.

[0006] The present invention adopts the following technical solution: An MRS water purification tank with a water and fertilizer circulation device in the planting layer includes: The tank body has a cavity; The container comprises a planting layer, a filter layer, a purification layer, and a water collection layer, all of which are disposed within the cavity and are arranged sequentially from the top to the bottom of the container. A drain pipe, wherein part of the drain pipe is located in the water collection layer and part extends out of the tank body; A water and fertilizer circulation device includes a material tank, a circulation pipe, and a water pump. The material tank is located on one side of the tank body, and the drain pipe is connected to the material tank. The material tank has a material cavity and a dispensing port communicating with the material cavity. The water pump is located in the material cavity. One end of the circulation pipe is connected to the water pump, and the other end of the circulation pipe extends to the top of the tank body, located on one side of the planting layer.

[0007] Optionally, the MRS water purification tank with a water and fertilizer circulation device in the planting layer includes an hourglass element; The hourglass component has a funnel shell and a feed pipe connected to the funnel shell. The funnel shell has a funnel cavity, and the feed pipe has a narrow channel communicating with the funnel cavity. The feeding pipe is inserted into the material cavity through the feeding port, and the funnel shell is located outside the material box.

[0008] Optionally, the drain pipe includes a main drain pipe and a branch pipe connected to the main drain pipe; The branch pipe is connected to the material box, and the bottom wall of the material cavity is lower than the branch pipe; A valve is installed on the branch pipe.

[0009] Optionally, the tank body includes a main tank and a movable support, the movable support including a support frame and brakeable casters disposed at the bottom of the support frame; The main tank is supported on the support frame; The hopper is located at the edge of the support frame, and at least part of its structure is lower than the support frame.

[0010] Optionally, the MRS water purification tank with a water and fertilizer circulation device in the planting layer includes a water spraying support. The watering support is detachably connected to the tank and covers the top of the planting layer; The water spray bracket is provided with a water flow channel, an interface, and a water spray hole. The interface and the water spray hole are both connected to the water flow channel, and the other end of the circulation pipe is connected to the interface.

[0011] Optionally, the water spray support includes an outer ring and a spiral tube; The spiral tube is at least partially located inside the outer ring body and connected to the outer ring body; The spiral tube is bent multiple times on a horizontal plane, and multiple water spray holes are provided on the spiral tube, with each water spray hole arranged sequentially along the length of the spiral tube. Multiple rods are provided on the outer ring body, and each rod is arranged at intervals along the circumference of the outer ring body. The rods are fixed to the spiral tube. The spiral tube is connected to the circulation tube.

[0012] Optionally, multiple columns are provided on the top outer wall of the tank; The column protrudes from the top edge of the tank body; A U-shaped component is provided at the top of the column; With the water spray bracket installed on the column, the outer ring body passes through each of the U-shaped parts.

[0013] Optionally, a connecting seat is provided on the outer wall of the top of the tank; The end of the column facing away from the U-shaped part is hinged to the connecting seat, and the rotation axis of the column is perpendicular to the central axis of the tank.

[0014] Optionally, the column includes a first column and a second column, the first column is hinged to the connecting seat, the second column is threaded to the first column, and the U-shaped member is provided at the end of the second column; Rotating the second column allows for adjustment of the total length of the column.

[0015] Optionally, the MRS water purification tank with a water and fertilizer circulation device in the planting layer includes a plurality of pipe fittings, each of which is arranged sequentially at intervals along the height direction of the tank, and the circulation pipe extends along the height direction of the tank and is respectively fixed to each of the pipe fittings. The pipe fitting has a base plate and two limiting arms disposed on the base plate. The base plate is fixed to the tank by fasteners. There is a gap between the two limiting arms. The circulation pipe extends through the gap and is clamped between the two limiting arms.

[0016] By sampling the above-mentioned technical solutions, this application has the following beneficial effects: The MRS water purification tank of this application incorporates a water-fertilizer circulation device that mixes fertilizer with purified water collected from the water collection layer. This mixture is then pumped and circulated back to the planting layer at the top of the tank via a circulation pipe, achieving automatic water and fertilizer recycling. This not only improves water resource utilization efficiency but also reduces the frequency and labor intensity of manual irrigation. It ensures that the vegetation in the planting layer receives sufficient water and nutrients during the filtration period, promoting healthy plant growth and enhancing the stability and purification effect of the entire MRS water purification system. Furthermore, the MRS water purification tank of this application has a compact structure and a rational layout of components, facilitating installation and maintenance.

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1 This illustration shows a cross-sectional view of an MRS water purification tank with a water and fertilizer circulation device in the planting layer provided in an embodiment of this disclosure. Figure 2 Show Figure 1 A magnified view of a section at point A in the middle; Figure 3 This diagram shows a top view of the water spraying support for the MRS water purification tank with a water and fertilizer circulation device provided in an embodiment of the present disclosure.

[0019] In the diagram: Tank 1, Main Tank 11, Movable Support 12, Support Frame 121, Brakeable Caster Wheel 122, Column 13, First Column 131, Second Column 132, U-Shaped Component 14, Connecting Seat 15, Planting Layer 2, Filter Layer 3, Purification Layer 4, Water Collection Layer 5, Drainage Pipe 6, Main Drainage Pipe 61, Branch Pipe 62, Water and Fertilizer Circulation Device 7, Material Box 71, Circulation Pipe 72, Hourglass Component 8, Funnel Shell 81, Discharge Pipe 82, Water Spraying Support 9, Outer Ring 91, Spiral Pipe 92, Rod 93, Pipe Fittings 10, Base Plate 101.

[0020] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 3As shown in the figure, this application embodiment provides an MRS water purification tank with a water and fertilizer circulation device in the planting layer, including a tank body 1, a planting layer 2, a filter layer 3, a purification layer 4, a water collection layer 5, a drain pipe 6, and a water and fertilizer circulation device 7. The tank body 1 has a cavity, and the planting layer 2, filter layer 3, purification layer 4, and water collection layer 5 are all disposed in the cavity, and are arranged sequentially from the top to the bottom of the tank body 1. The drain pipe 6 is partially located in the water collection layer 5 and partially extends out of the tank body 1. The water and fertilizer circulation device 7 includes a material box 71, a circulation pipe 72, and a water pump. The material box 71 is located on one side of the tank body 1. The drain pipe 6 is connected to the material box 71. The material box 71 has a material cavity and a dispensing port communicating with the material cavity. The water pump is located in the material cavity. One end of the circulation pipe 72 is connected to the water pump, and the other end of the circulation pipe 72 extends to the top of the tank body 1, located on one side of the planting layer 2.

[0025] The wastewater inlet pipe is partially located in the filter layer 3 and partially extends out of the tank 1. The sludge discharge pipe (not shown) can be partially located in the filter layer and partially extend out of the tank 1. The wastewater inlet pipe and the sludge discharge pipe are connected by multiple water distribution pipes (not shown), which are densely covered with water outlets. Wastewater flows in through the wastewater inlet pipe, and some of the liquid in the wastewater is discharged into the filter layer 3 through the water outlets on the water distribution pipes. The viscous sludge in the wastewater is discharged out of the tank through the sludge discharge pipe. The wastewater discharged from the water outlets further flows into the purification layer 4 for purification. The purified water flows into the water collection layer 5, and the purified water in the water collection layer 5 is discharged into the material chamber of the water and fertilizer circulation device 7 through the drain pipe 6. Fertilizer can be added to the material tank 71 to mix with the purified water. The water pump can pump the water and fertilizer in the material tank 71 to the planting layer 2 through the circulation pipe 72 to irrigate the vegetation in the planting layer 2.

[0026] The MRS water purification tank of this application incorporates a water-fertilizer circulation device that mixes fertilizer with purified water collected from the water collection layer. This mixture is then pumped and circulated back to the planting layer at the top of the tank via a circulation pipe, achieving automatic water and fertilizer recycling. This not only improves water resource utilization efficiency but also reduces the frequency and labor intensity of manual irrigation. It ensures that the vegetation in the planting layer receives sufficient water and nutrients during the filtration period, promoting healthy plant growth and enhancing the stability and purification effect of the entire MRS water purification system. Furthermore, the MRS water purification tank of this application has a compact structure and a rational layout of components, facilitating installation and maintenance.

[0027] In some possible implementations, the MRS water purification tank with a water and fertilizer circulation device in the planting layer also includes an hourglass component 8. The hourglass component 8 has a funnel shell 81 and a discharge pipe 82 connected to the funnel shell 81. The funnel shell 81 has a funnel cavity, and the discharge pipe 82 has a narrow channel communicating with the funnel cavity. The discharge pipe 82 is inserted into the cavity through the inlet, and the funnel shell 81 is confined to the outside of the hopper. The design of the hourglass component 8 makes the fertilizer addition process more precise and controllable. When fertilizer needs to be added to the hopper 71, simply pour the fertilizer into the funnel shell 81. The fertilizer will slowly and evenly enter the cavity through the narrow channel. The fertilizer entering the cavity mixes with the purified water entering the cavity and is then transported to the planting layer through the circulation pipe. That is, the fertilizer addition and water extraction processes occur simultaneously, avoiding the problem of uneven concentration caused by a large amount of fertilizer entering at once. The funnel shell 81 also facilitates the operator's observation of the fertilizer addition, ensuring the accuracy of the added amount. Furthermore, the connection between the hourglass component 8 and the material box 71 is simple and reliable, facilitating disassembly and cleaning, and reducing maintenance costs. In practical applications, operators can flexibly adjust the amount and frequency of fertilizer addition based on the growth needs of the vegetation in the planting layer 2 and the operating status of the purification system to achieve the best purification effect and vegetation growth. The fertilizer can be granular or powdered. For example, it can be granular or powdered potassium dihydrogen phosphate, urea, etc.

[0028] In some possible implementations, the drain pipe 6 includes a main drain pipe 61 and a branch pipe 62 connected to the main drain pipe 61. The branch pipe 62 is connected to the material tank 71, and the bottom wall of the material chamber is lower than that of the branch pipe 62. A valve is installed on the branch pipe 62. This design allows for flexible control of the water flow direction when draining clean water from the water collection layer 5. When the valve is open, some clean water can flow into the material tank 71 through the branch pipe 62 for water-fertilizer circulation. When the valve is closed, all clean water is discharged from the tank 1 through the main drain pipe 61. Simultaneously, the design of the bottom wall of the material chamber being lower than that of the branch pipe 62 ensures that the water-fertilizer in the material tank 71 will not flow back into the branch pipe 62, thus guaranteeing the normal operation of the system. Furthermore, the valve allows operators to manually control the system according to actual needs, improving the system's flexibility and reliability.

[0029] In some possible implementations, the tank 1 includes a main tank 11 and a movable support 12, the movable support 12 including a support frame 121 and brakeable casters 122 disposed at the bottom of the support frame 121. The main tank 11 is supported on the support frame 121, and the hopper 71 is disposed at the edge of the support frame 121, and at least part of its structure is lower than the support frame 121.

[0030] This structural design endows the entire MRS water purification tank 1 with excellent mobility and stability. The movable support 12 allows the tank 1 to be easily moved to different locations according to the needs of actual use, without the need for cumbersome handling and reinstallation. The design of the brakeable swivel casters 122 ensures that the tank 1 is firmly fixed to the ground after being moved into place, and will not be easily moved by external forces, thus ensuring the normal operation and safety of the system. At the same time, placing the material box 71 on the edge of the support frame 121, with part of its structure lower than the support frame 121, not only makes full use of space, but also facilitates the inflow of clean water and stores more water for later use.

[0031] In some possible implementations, the MRS water purification tank with a water and fertilizer circulation device in the planting layer also includes a water-sprinkling bracket 9. The water-sprinkling bracket 9 is detachably connected to the tank 1 and covers the top of the planting layer 2. The water-sprinkling bracket 9 is provided with a water flow channel, an interface, and water-sprinkling holes. Both the interface and the water-sprinkling holes are connected to the water flow channel, and the other end of the circulation pipe 72 is connected to the interface. The water flow channel and water-sprinkling holes within the water-sprinkling bracket 9 ensure stable water flow channel positioning and uniform watering. When water and fertilizer are delivered to the interface of the water-sprinkling bracket 9 through the circulation pipe 72, they can be evenly distributed along the water flow channel to each water-sprinkling hole, thereby irrigating the vegetation in the planting layer 2. Simultaneously, the detachable connection method makes the installation and removal of the water-sprinkling bracket 9 very convenient. When cleaning, maintenance, or replacement of the water-sprinkling bracket 9 is required, operators can easily remove it from the tank 1, improving the maintenance efficiency and convenience of the equipment.

[0032] In some possible implementations, such as Figure 2 and Figure 3As shown, the watering support 9 includes an outer ring 91 and a spiral tube 92. The spiral tube 92 is at least partially located inside and connected to the outer ring 91. The spiral tube 92 is bent multiple times on a horizontal plane, and multiple watering holes are provided on the spiral tube 92, arranged sequentially along the length of the spiral tube 92. Multiple rods 93 are provided on the outer ring 91, spaced apart sequentially along the circumference of the outer ring 91. The rods 93 are fixed to the spiral tube 92, which is connected to the circulation pipe 72. This design of the watering support 9, combining the spiral tube 92 and the outer ring 91, further improves the uniformity and efficiency of water and fertilizer irrigation. The multiple bends of the spiral tube 92 on a horizontal plane allow for sufficient dispersion of water and fertilizer as it passes through, while the multiple watering holes arranged sequentially along the length of the spiral tube 92 ensure that water and fertilizer are evenly distributed across all areas of the planting layer 2. The multiple rods 93 on the outer ring 91 not only serve to fix the spiral tube 92, but also enhance the structural stability of the entire watering support 9. When water and fertilizer are transported to the spiral tube 92 through the circulation pipe 72, they can be evenly distributed along the path of the spiral tube 92 and accurately irrigated onto the vegetation through each watering hole, meeting the vegetation's needs for water and nutrients.

[0033] In some possible implementations, multiple columns 13 are provided on the top outer wall of the tank 1. The columns 13 protrude from the top edge of the tank 1, and U-shaped members 14 are provided at the top of each column 13. When the watering bracket 9 is installed on the columns 13, the outer ring 91 passes through each of the U-shaped members 14. This combination of columns 13 and U-shaped members 14 provides a stable and convenient installation method for the watering bracket 9. The columns 13 protruding from the top edge of the tank 1 not only increases the installation height, allowing the watering bracket 9 to better cover the planting layer 2, but also facilitates installation and disassembly operations by operators. The U-shaped members 14 are located at the top of the columns 13, with their openings facing upwards, allowing the outer ring 91 to easily pass through, achieving a quick connection between the watering bracket 9 and the tank 1. Simultaneously, the structure of the U-shaped members 14 also ensures the stability of the watering bracket 9 after installation, preventing it from easily falling off or shifting due to external forces.

[0034] In some possible implementations, a connecting seat 15 is provided on the outer wall of the top of the tank 1, and the end of the column 13 facing away from the U-shaped member 14 is hinged to the connecting seat 15. The rotation axis of the column 13 is perpendicular to the central axis of the tank 1. This hinged design makes it easy to store the column 13 when not in use. When the water spray bracket 9 is not needed or other operations are required on the tank 1, the operator can rotate the column 13 around the hinge point to bring it closer to the lower part of the tank 1, thereby reducing the space occupied and facilitating the storage, transportation, or other maintenance of the tank 1. Moreover, this storage method is simple and convenient, requiring no complicated operating steps, and can be easily completed by one person, greatly improving the flexibility and convenience of equipment use.

[0035] In some possible implementations, the column 13 includes a first column 131 and a second column 132. The first column 131 is hinged to the connecting seat, and the second column 132 is threaded to the first column 131. The end of the second column 132 is provided with the U-shaped piece 14. Rotating the second column 132 can adjust the total length of the column 13. This adjustable-length column 13 design brings greater adaptability and flexibility to the entire MRS water purification tank 1. In practical applications, due to the possible differences in the height, growth requirements, and growth periods of different planting layers 2, different requirements will be placed on the installation height of the watering bracket 9. The column 13 in this application, through the threaded connection of the first column 131 and the second column 132, allows the operator to easily rotate the second column 132 to adjust the total length of the column 13 according to actual needs. When the installation height of the watering bracket 9 needs to be increased, simply rotate the second column 132 to increase the total length of the column 13, allowing the watering bracket 9 to better cover the planting layer 2. Conversely, when the installation height needs to be lowered or the equipment needs to be stored, rotate the second column 132 in the opposite direction to reduce the total length of the column 13. This structural design not only meets the watering height requirements of different planting layers 2, but also improves the versatility and practicality of the equipment.

[0036] In some possible implementations, the MRS water purification tank with a water and fertilizer circulation device in the planting layer also includes multiple pipe fasteners 10, each of which is arranged sequentially at intervals along the height direction of the tank 1. The circulation pipe 72 extends along the height direction of the tank 1 and is fixed to each of the pipe fasteners 10. Each pipe fastener 10 has a base plate 101 and two limiting arms 102 disposed on the base plate 101. The base plate 101 is fixed to the tank 1 by fasteners, and there is a gap between the two limiting arms 102. The circulation pipe 72 extends through the gap and is clamped between the two limiting arms 102. This design of the pipe fastener 10 provides a stable and reliable fixing method for the circulation pipe 72. The multiple pipe fasteners 10 arranged sequentially at intervals along the height direction of the tank 1 ensure that the circulation pipe 72 is effectively supported and fixed throughout its extension path, avoiding problems such as sagging or swaying caused by excessive length or weight of the circulation pipe 72, thereby ensuring the stable operation of the water and fertilizer circulation system. The base plate 101 of the pipe fastener 10 is fixed to the tank body 1 by fasteners. This fixing method is firm and reliable, not easy to loosen, and can withstand various forces generated by the circulation pipe 72 during operation. The gap formed between the two limiting arms 102 cleverly achieves clamping and fixing of the circulation pipe 72. When the circulation pipe 72 extends through the gap, it is tightly clamped by the two limiting arms 102, which not only does not affect the normal flow of the circulation pipe 72, but also prevents it from shifting or falling off during use.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An MRS water purification tank with a water and fertilizer circulation device in the planting layer, characterized in that, include: The tank body has a cavity; The container comprises a planting layer, a filter layer, a purification layer, and a water collection layer, all of which are disposed within the cavity and are arranged sequentially from the top to the bottom of the container. A drain pipe, wherein part of the drain pipe is located in the water collection layer and part extends out of the tank body; A water and fertilizer circulation device includes a material tank, a circulation pipe, and a water pump. The material tank is located on one side of the tank body, and the drain pipe is connected to the material tank. The material tank has a material cavity and a dispensing port communicating with the material cavity. The water pump is located in the material cavity. One end of the circulation pipe is connected to the water pump, and the other end of the circulation pipe extends to the top of the tank body, located on one side of the planting layer.

2. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 1, characterized in that, Including hourglass components; The hourglass component has a funnel shell and a feed pipe connected to the funnel shell. The funnel shell has a funnel cavity, and the feed pipe has a narrow channel communicating with the funnel cavity. The feeding pipe is inserted into the material cavity through the feeding port, and the funnel shell is located outside the material box.

3. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 2, characterized in that, The drainage pipe includes a main drainage pipe and branch pipes connected to the main drainage pipe; The branch pipe is connected to the material box, and the bottom wall of the material cavity is lower than the branch pipe; A valve is installed on the branch pipe.

4. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 3, characterized in that, The tank body includes a main tank and a movable support frame, the movable support frame including a support frame and brakeable casters disposed at the bottom of the support frame; The main tank is supported on the support frame; The hopper is located at the edge of the support frame, and at least part of its structure is lower than the support frame.

5. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 4, characterized in that, Including water spray support frame; The watering support is detachably connected to the tank and covers the top of the planting layer; The water spray bracket is provided with a water flow channel, an interface, and a water spray hole. The interface and the water spray hole are both connected to the water flow channel, and the other end of the circulation pipe is connected to the interface.

6. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 5, characterized in that, The water spray support includes an outer ring and a spiral tube; The spiral tube is at least partially located inside the outer ring body and connected to the outer ring body; The spiral tube is bent multiple times on a horizontal plane, and multiple water spray holes are provided on the spiral tube, with each water spray hole arranged sequentially along the length of the spiral tube. Multiple rods are provided on the outer ring body, and each rod is arranged at intervals along the circumference of the outer ring body. The rods are fixed to the spiral tube. The spiral tube is connected to the circulation tube.

7. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 6, characterized in that, Multiple columns are installed on the top outer wall of the tank; The column protrudes from the top edge of the tank body; A U-shaped component is provided at the top of the column; With the water spray bracket installed on the column, the outer ring body passes through each of the U-shaped parts.

8. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 7, characterized in that, A connecting seat is provided on the outer wall of the top of the tank; The end of the column facing away from the U-shaped part is hinged to the connecting seat, and the rotation axis of the column is perpendicular to the central axis of the tank.

9. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 8, characterized in that, The column includes a first column and a second column. The first column is hinged to the connecting seat, and the second column is threaded to the first column. The U-shaped piece is provided at the end of the second column. Rotating the second column allows for adjustment of the total length of the column.

10. The MRS water purification tank with a water and fertilizer circulation device in the planting layer according to claim 1, characterized in that, It includes multiple pipe fittings, each of which is arranged at intervals along the height direction of the tank. The circulation pipe extends along the height direction of the tank and is fixed to each of the pipe fittings. The pipe fitting has a base plate and two limiting arms disposed on the base plate. The base plate is fixed to the tank by fasteners. There is a gap between the two limiting arms. The circulation pipe extends through the gap and is clamped between the two limiting arms.

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