Large sand filter tank water supply and drainage system

Through the multi-channel filtration and photovoltaic power generation system of the large sand filter tank water supply and drainage system, the existing sand filter tank system has solved the problems of poor filtration effect and high cost, and achieved an efficient and environmentally friendly seawater water supply solution.

CN223184234UActive Publication Date: 2025-08-05FUJIAN ZHIFU TECHNOLOGY DEVELOPMENT CO LTD
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Patent Information

Application Number
CN202422481209.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-14
Publication Date
2025-08-05
Estimated Expiration
2034-10-14

AI Technical Summary

Technical Problem

The existing sand filter canister system has poor filtration effect in onshore Shanghai water seedling breeding, high cost, difficult to apply on a large scale, and external pipelines affect the ecological environment.

Method used

Large sand filter tank water supply and drainage systems are adopted, including pre-purification filtration systems, water replenishment systems and water supply systems, seawater is purified through multiple filtration methods, and photovoltaic power generation systems are equipped to supply power, and sewage treatment systems are installed to improve environmental protection performance.

Benefits of technology

It has achieved efficient filtration of seawater, reduced the maintenance cost and workload of large sand filter tanks, improved water supply efficiency, reduced impact on the ecological environment, and ensured the stability of water quality and environmental protection performance.

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Abstract

The utility model discloses a water supply and drainage system for a large sand filter tank. The water supply and drainage system comprises an early-stage purification filter system, a water replenishing system, the large sand filter tank and a water supply system, the early-stage purification and filtration system comprises a rough filtration water inlet pond connected with external seawater through a water diversion channel, the rough filtration water inlet pond is connected with a filter pond through a pipeline, the rough filtration water inlet pond is connected with multiple sets of first water supply pumps, and the first water supply pumps are connected with the user seedling culture pond through first water supply pipelines. The water replenishing system comprises a precipitation water pumping tank connected with the filter tank through a pipeline, and the precipitation water pumping tank is connected with the large sand filter tank through a water pump; the water supply system comprises a water supply pond connected with a water outlet of the large sand filter tank, the water supply pond is connected with multiple sets of second water supply pumps, and the second water supply pumps are connected with the user seedling culture pond through second water supply pipelines. The device has the advantages that a large amount of delicate and practical seawater can be filtered, and the problems of difficult water taking and serious water shortage in the breeding industry are solved; the workload of a large sand filter tank is effectively reduced; and the environmental protection performance of the system is effectively improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of seawater filtering devices, in particular to a large-scale sand filter tank water supply and drainage system. Background Art

[0002] In onshore marine aquaculture, most aquaculture water is replenished through a beach well system. This system involves digging wells on the beach, leveraging the natural filtration of the sand and the storage capacity of underground aquifers to obtain relatively clean water. During high tide, seawater seeps into the beach, where it is filtered through the sand layer, removing impurities. A portion of the seawater is then stored in the aquifer beneath the beach. After the well is dug, this filtered water is extracted using pumps and other equipment for various uses. While existing beach well systems can obtain relatively clean seawater at a low cost, the water supply is limited, making them unsuitable for large-scale marine aquaculture.

[0003] In order to solve the serious water shortage problem in onshore seawater seedling cultivation in the existing technology, the aquaculture water supply is generally completed by equipping multiple sand filter tanks in conjunction with a well-drilling water intake system. The sand filter tank is a commonly used filtering equipment. After the water enters the sand filter tank from the water inlet, it is filtered through the filter material layer. The pores between the sand can intercept impurities in the water, so that the water is purified. The filtered water flows out from the outlet for subsequent use. Although the existing sand filter tank can filter impurities in seawater, the filtering effect is poor and it cannot be used directly for seedling cultivation; the use cost is high, the scope of use is narrow, and it is difficult to promote its use; the external pipeline is long, which seriously affects the surrounding ecological environment.

[0004] Therefore, there is an urgent need for a seawater filtration system that can efficiently and massively provide clean seawater. Utility Model Content

[0005] In order to solve the above problems, especially to address the deficiencies in the existing technology, the utility model provides a large sand filter tank water supply and drainage system that can solve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical means:

[0007] A large sand filter tank water supply and drainage system, including an early purification and filtration system, a water replenishment system, a large sand filter tank, and a water supply system;

[0008] The preliminary purification and filtration system includes a coarse filtration water inlet pool connected to external seawater through a water diversion channel, the coarse filtration water inlet pool is connected to a filtration pool through a pipeline, the coarse filtration water inlet pool is connected to multiple groups of first water supply pumps, and the first water supply pumps are connected to the user's seedling breeding pool through a first water supply pipeline;

[0009] The water replenishment system includes a sedimentation pumping tank connected to the filter tank through a pipeline, and the sedimentation pumping tank is connected to a large sand filter tank through a pumping pump;

[0010] The large sand filter tank includes a tank body, the top of which is connected to a water inlet connected to a water pump for replenishing seawater into the tank body, the bottom of which is connected to a hydrostatic shell for storing filtered seawater, and the tank body is sequentially connected from top to bottom with a water diversion channel for diverting seawater, a filter plate for a first pass of seawater filtration, a fine sand filtration area for a second pass of seawater filtration, a coarse sand filtration area for a third pass of seawater filtration, a gravel filtration area for a fourth pass of seawater filtration, and a dehydration plate for separating the filtered seawater. The side of the hydrostatic shell is connected to a water outlet for discharging the filtered seawater and a sampling port for sampling the filtered seawater.

[0011] The water supply system includes a water supply pool connected to the water outlet of the large sand filter tank, the water supply pool is connected to multiple groups of second water supply pumps, and the second water supply pumps are connected to the user's seedling breeding pool through a second water supply pipeline.

[0012] A further solution of the present invention is that the water inlet end of the water diversion channel is connected to a water intake head, and the water intake head is a three-dimensional structure with upper and lower surfaces being sealed planes and the surrounding areas being water inlet surfaces.

[0013] A further solution of the present invention is that the coarse filtration water inlet pool includes a grid filter pool constructed of reinforced concrete, and the grid filter pool is sequentially connected with a first debris filter plate, a first impurity filter plate, a second impurity filter plate, and a third impurity filter plate from top to bottom.

[0014] A further solution of the present invention is that the filter pool includes a filter pool body, the top of the filter pool body is connected to a second debris filter plate, and the filter pool body is paved with fine sand, coarse sand, small stones and large stones in sequence from top to bottom.

[0015] A further solution of the present invention is that the sedimentation pumping tank is a grid sedimentation tank.

[0016] A further solution of the present invention is that a flow monitoring device is connected to the top of the tank body, the flow monitoring device is a flow meter, the hydrostatic shell is connected to a temperature sensor and a water quality monitor, and the temperature sensor, water quality monitor and flow monitoring device are respectively connected to an external intelligent display device.

[0017] A further solution of the present invention is that the large sand filter tank water supply and drainage system also includes a sewage treatment system, and the sewage treatment system includes a sedimentation return water treatment tank connected to the user's seedling breeding pool through a pipeline, and the sedimentation return water treatment tank is connected to the external seawater through a drainage channel.

[0018] A further solution of the present invention is that the sedimentation return water treatment tank is a filtration treatment tank equipped with a sludge filter press device.

[0019] A further solution of the present utility model is that the early purification and filtration system and the water replenishment system are installed underground or on the ground, the large sand filter tank and the water supply system are installed on the ground, and a building is built outside the large sand filter tank and the water supply system. The top of the building is connected to a photovoltaic power generation system, and the photovoltaic power generation system is used to power electrical equipment in all systems.

[0020] A further solution of the present invention is that the photovoltaic power generation system is a photovoltaic panel power generation system.

[0021] Beneficial effects of the utility model:

[0022] 1. The utility model system purifies and filters seawater through multiple channels and various filtering methods, so that the seawater reaches certain indicators and quality and can be supplied to various seedling breeding and aquaculture on the shore. It can filter a large amount of refined and practical seawater, and solve the problems of difficult water supply and severe water shortage in the aquaculture industry.

[0023] 2. The utility model system effectively improves the service life and working efficiency of large sand filter tanks through the early purification and filtration system, effectively reduces the maintenance cost of large sand filter tanks, and effectively reduces the workload of large sand filter tanks.

[0024] 3. The sewage treatment system of the present invention can effectively treat the sewage discharged from the user's seedling breeding pond, and effectively improve the environmental protection performance of the system.

[0025] 4. The water supply of this utility model is not affected by external environment such as tides, wind and waves, which saves trouble and allows you to use water with confidence, effectively improving water supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the coarse filtration water inlet tank, filtration tank, and sedimentation pumping tank of the utility model;

[0028] Figure 3 This is a cross-sectional view of the coarse filtration water inlet pool of the utility model;

[0029] Figure 4 This is a cross-sectional view of the filter tank of the utility model;

[0030] Figure 5 This is a schematic diagram of the connection between the sedimentation and return water treatment pool of the utility model and the user's seedling breeding pool;

[0031] Figure 6 This is a schematic structural diagram of a large sand filter tank of the utility model;

[0032] Figure 7 This is a schematic diagram of the connection between the water supply pool of the utility model and the user's seedling breeding pool;

[0033] Reference numerals:

[0034] Water diversion channel 1, coarse filtration water inlet pool 2, filter pool 3, sedimentation pumping pool 4, pumping pump 5, drainage channel 6, sedimentation return water treatment pool 7, large sand filter tank 8, water supply pool 9, second water supply pump 10, second water supply pipeline 11, user seedling breeding pool 12, building 13, photovoltaic power generation system 14, water intake head 15, first water supply pipeline 16, first water supply pump 17, format filter pool 201, first debris filter plate 202, first impurity filter plate 203, second impurity filter plate 204, first Three impurity filter plates 205, filter tank body 301, second impurity filter plate 302, fine sand 303, coarse sand 304, small stones 305, large stones 306, tank body 801, water inlet 802, water diversion channel 803, filter plate 804, fine sand filtration area 805, coarse sand filtration area 806, stone filtration area 807, dehydration plate 808, water outlet 809, still water shell 810, lofting port 811, temperature sensor 812, water quality monitor 813, flow monitoring device 814. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] Example 1

[0037] like Figure 1-7 As shown, a large sand filter tank water supply and drainage system includes an early purification and filtration system, a water replenishment system, a large sand filter tank 8, and a water supply system;

[0038] The early purification and filtration system includes a coarse filtration water inlet pool 2 connected to external seawater through a water diversion channel 1. The coarse filtration water inlet pool 2 is connected to a filtration pool 3 through a pipeline. The coarse filtration water inlet pool 2 is connected to multiple groups of first water supply pumps 17. The first water supply pumps 17 are connected to the user's seedling breeding pool 12 through a first water supply pipeline 16;

[0039] The water replenishment system includes a sedimentation pumping tank 4 connected to the filter tank 3 through a pipeline, and the sedimentation pumping tank 4 is connected to a large sand filter tank 8 through a pumping pump 5;

[0040] The large sand filter tank 8 includes a tank body 801. The top of the tank body 801 is connected to a water inlet 802 connected to a water pump 5 for replenishing seawater into the tank body 801. The bottom of the tank body 801 is connected to a still water housing 810 for storing filtered seawater. The tank body 801 is connected to a water diversion channel 803 for diverting seawater, a filter plate 804 for filtering seawater in the first pass, a fine sand filter area 805 for filtering seawater in the second pass, a coarse sand filter area 806 for filtering seawater in the third pass, a gravel filter area 807 for filtering seawater in the fourth pass, and a dehydration plate 808 for separating and filtering seawater. The side of the still water housing 810 is connected to a water outlet 809 for discharging filtered seawater and a sampling port 811 for sampling filtered seawater.

[0041] The water supply system includes a water supply pool 9 connected to the water outlet 809 of the large sand filter tank 8. The water supply pool 9 is connected to multiple groups of second water supply pumps 10. The second water supply pumps 10 are connected to the user's seedling breeding pool 12 through a second water supply pipe 11.

[0042] Working principle:

[0043] First, a water intake head 15 is set up at a place where the lowest water level is about ten meters near the coast. Then, the water is led to the coarse filtration water inlet pool 2 on the shore through the water diversion channel 1. The seawater filtered by the coarse filtration water inlet pool 2 flows into the filter pool 3 for filtration through a pipeline. The seawater filtered by the filter pool 3 flows into the sedimentation pumping pool 4 through a pipeline. After the above-mentioned multiple scientific purification and filtration work, the seawater in the sedimentation pumping pool 4 is pumped into the large sand filter tank 8 by the water pump 5. The large sand filter tank 8 is finely filtered through the filter plate 804, the fine sand filter area 805, the coarse sand filter area 806, and the gravel filter area 807, and then transmitted to the water supply pool 9 through a pipeline. The water supply pool 9 supplies water to the user seedling breeding pool 12 of the farmer through the second water supply pump 10. At the same time, the coarse filtration water inlet pool 2 also supplies water to the user seedling breeding pool 12 of the farmer through the first water supply pump 17. The combined use of the two can supply up to 10 million cubic meters of water per day, thereby effectively solving the water problem of the farmer. During use, the large sand filter tank 8 can quickly obtain filtered water through the sampling port 811, effectively improving the detection efficiency of filtered water.

[0044] Example 2

[0045] like Figure 1-7 As shown, a large sand filter tank water supply and drainage system includes an early purification and filtration system, a water replenishment system, a large sand filter tank 8, and a water supply system;

[0046] The early purification and filtration system includes a coarse filtration water inlet pool 2 connected to external seawater through a water diversion channel 1. The coarse filtration water inlet pool 2 is connected to a filtration pool 3 through a pipeline. The coarse filtration water inlet pool 2 is connected to multiple groups of first water supply pumps 17. The first water supply pumps 17 are connected to the user's seedling breeding pool 12 through a first water supply pipeline 16;

[0047] The water replenishment system includes a sedimentation pumping tank 4 connected to the filter tank 3 through a pipeline, and the sedimentation pumping tank 4 is connected to a large sand filter tank 8 through a pumping pump 5;

[0048] The large sand filter tank 8 includes a tank body 801. The top of the tank body 801 is connected to a water inlet 802 connected to a water pump 5 for replenishing seawater into the tank body 801. The bottom of the tank body 801 is connected to a still water housing 810 for storing filtered seawater. The tank body 801 is connected to a water diversion channel 803 for diverting seawater, a filter plate 804 for filtering seawater in the first pass, a fine sand filter area 805 for filtering seawater in the second pass, a coarse sand filter area 806 for filtering seawater in the third pass, a gravel filter area 807 for filtering seawater in the fourth pass, and a dehydration plate 808 for separating and filtering seawater. The side of the still water housing 810 is connected to a water outlet 809 for discharging filtered seawater and a sampling port 811 for sampling filtered seawater.

[0049] The water supply system includes a water supply pool 9 connected to the water outlet 809 of the large sand filter tank 8. The water supply pool 9 is connected to multiple groups of second water supply pumps 10. The second water supply pumps 10 are connected to the user's seedling breeding pool 12 through a second water supply pipe 11.

[0050] The water inlet of the water diversion channel 1 is connected to a water intake head 15. This is a three-dimensional structure with sealed upper and lower surfaces and a surrounding water inlet surface. The upper surface is designed to prevent the inhalation of floating objects and prevent vortex-like water inflow, which could harm the environment. The lower surface is designed to prevent the inhalation of debris such as silt. This arrangement effectively improves the efficiency and effectiveness of the water intake head 15.

[0051] The coarse filtration inlet tank 2 comprises a reinforced concrete grid filter tank 201. Connected within grid filter tank 201, from top to bottom, are a first debris filter plate 202, a first impurity filter plate 203, a second impurity filter plate 204, and a third impurity filter plate 205. The incoming seawater is relatively dirty and contains a lot of debris. Larger impurities are effectively filtered out by the first debris filter plate 202, while larger impurities are effectively filtered out by the first, second, and third impurity filter plates. This provides clean water to the large sand filter tank 8, extending its lifespan and reducing costs. More importantly, it ensures that the water quality from the large sand filter tank 8 meets standards and maintains water supply.

[0052] Filter tank 3 includes a filter tank body 301, with a second debris filter plate 302 connected to the top of filter tank body 301. Fine sand 303, coarse sand 304, small stones 305, and large stones 306 are laid in order from top to bottom within filter tank body 301. Second debris filter plate 302 filters debris and acts as a buffer for the fine sand 303 below, preventing it from being dispersed and unevenly distributed by incoming water. Fine sand 303 and coarse sand 304 filter silt and impurities from the water. Small stones 305 act as a cushion to prevent the coarse sand 304 from leaking out, and large stones 306 provide dehydration.

[0053] The sedimentation and pumping tank 4 is a lattice sedimentation tank. The lattice sedimentation tank can prevent the water pump 5 from sucking in sand and preventing the water pump 5 from wearing out, effectively ensuring the service life of the water pump 5, effectively reducing the cost of using the water pump 5, and ensuring that the seawater pumped out by the water pump 5 can always be kept clean.

[0054] A flow monitoring device 814, a flow meter, is connected to the top of the tank 801. A temperature sensor 812 and a water quality monitor 813 are connected to the hydrostatic housing 810. Each of these sensors is connected to an external intelligent display device. The temperature sensor 812 constantly monitors the temperature of the outgoing water, the water quality monitor 813 monitors the quality of the filtered water, and the flow monitoring device 814 constantly monitors the inlet flow, effectively improving the efficiency and effectiveness of the large sand filter tank 8.

[0055] Example 3

[0056] A large sand filter tank water supply and drainage system, including an early purification and filtration system, a water replenishment system, a large sand filter tank 8, and a water supply system;

[0057] The early purification and filtration system includes a coarse filtration water inlet pool 2 connected to external seawater through a water diversion channel 1. The coarse filtration water inlet pool 2 is connected to a filtration pool 3 through a pipeline. The coarse filtration water inlet pool 2 is connected to multiple groups of first water supply pumps 17. The first water supply pumps 17 are connected to the user's seedling breeding pool 12 through a first water supply pipeline 16;

[0058] The water replenishment system includes a sedimentation pumping tank 4 connected to the filter tank 3 through a pipeline, and the sedimentation pumping tank 4 is connected to a large sand filter tank 8 through a pumping pump 5;

[0059] The large sand filter tank 8 includes a tank body 801. The top of the tank body 801 is connected to a water inlet 802 connected to a water pump 5 for replenishing seawater into the tank body 801. The bottom of the tank body 801 is connected to a still water housing 810 for storing filtered seawater. The tank body 801 is connected to a water diversion channel 803 for diverting seawater, a filter plate 804 for filtering seawater in the first pass, a fine sand filter area 805 for filtering seawater in the second pass, a coarse sand filter area 806 for filtering seawater in the third pass, a gravel filter area 807 for filtering seawater in the fourth pass, and a dehydration plate 808 for separating and filtering seawater. The side of the still water housing 810 is connected to a water outlet 809 for discharging filtered seawater and a sampling port 811 for sampling filtered seawater.

[0060] The water supply system includes a water supply pool 9 connected to the water outlet 809 of the large sand filter tank 8. The water supply pool 9 is connected to multiple groups of second water supply pumps 10. The second water supply pumps 10 are connected to the user's seedling breeding pool 12 through a second water supply pipe 11.

[0061] The large sand filter tank water supply and drainage system also includes a sewage treatment system, which includes a sedimentation return water treatment tank 7 connected to the user's seedling breeding pond 12 via a pipeline. The sedimentation return water treatment tank 7 is connected to the external seawater through a drainage channel 6. This arrangement prevents liquid discharged from the user's seedling breeding pond 12 from polluting the environment, effectively improving the system's environmental performance.

[0062] The sedimentation return water treatment tank 7 is a filtration treatment tank equipped with a sludge filter press. The sludge filter press can effectively treat sediments, and the filtration treatment tank has a good filtration effect. The combination of the two can effectively improve the working efficiency and working effect of the sedimentation return water treatment tank 7.

[0063] The initial purification and filtration system and water replenishment system are installed underground or above ground. The large sand filter tank 8 and water supply system are also installed above ground. A building 13 is built outside the large sand filter tank 8 and water supply system. A photovoltaic power generation system 14 is connected to the top of the building 13, which supplies power to all electrical devices in the system. The installation of the building 13 effectively protects the large sand filter tank 8 and water supply system, while the installation of the photovoltaic power generation system 14 effectively reduces electricity costs.

[0064] The photovoltaic power generation system 14 is a photovoltaic panel power generation system. The photovoltaic panel power generation system is simple to install and easy to use, and can effectively improve the working efficiency and working effect of the photovoltaic power generation system 14.

[0065] The examples provided herein are not intended to limit the embodiments. Those skilled in the art will appreciate that other variations or modifications may be made based on the above description. It is not necessary and impossible to enumerate all embodiments here, and any obvious variations or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A large sand filter tank water supply and drainage system, characterized in that: It includes the early purification and filtration system, water supply system, large sand filter tank (8), and water supply system; The preliminary purification and filtration system comprises a coarse filtration water inlet pool (2) connected to external seawater via a water diversion channel (1), the coarse filtration water inlet pool (2) being connected to a filtration pool (3) via a pipeline, the coarse filtration water inlet pool (2) being connected to a plurality of first water supply pumps (17), the first water supply pumps (17) being connected to a user's seedling breeding pond (12) via a first water supply pipeline (16); The water replenishment system comprises a sedimentation pumping tank (4) connected to the filter tank (3) via a pipeline, and the sedimentation pumping tank (4) is connected to a large sand filter tank (8) via a pumping pump (5); The large sand filter tank (8) comprises a tank body (801), the top of the tank body (801) is connected to a water inlet (802) connected to a water pump (5) for replenishing seawater into the tank body (801), the bottom of the tank body (801) is connected to a still water shell (810) for storing filtered seawater, the tank body (801) is sequentially connected from top to bottom with a water diversion channel (803) for diverting seawater, a filter plate (804) for filtering seawater in the first pass, a fine sand filter area (805) for filtering seawater in the second pass, a coarse sand filter area (806) for filtering seawater in the third pass, a gravel filter area (807) for filtering seawater in the fourth pass, and a dehydration plate (808) for separating and filtering seawater, and the side of the still water shell (810) is connected to a water outlet (809) for discharging filtered seawater and a sampling port (811) for sampling filtered seawater. The water supply system comprises a water supply pool (9) connected to the water outlet (809) of the large sand filter tank (8), the water supply pool (9) being connected to a plurality of groups of second water supply pumps (10), and the second water supply pumps (10) being connected to a user's seedling cultivation pool (12) via a second water supply pipe (11).

2. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The water inlet end of the water diversion channel (1) is connected to a water intake head (15), and the water intake head (15) is a three-dimensional structure with sealed planes on the upper and lower sides and water inlet surfaces on all sides.

3. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The coarse filtration water inlet pool (2) comprises a grid filter pool (201) constructed of reinforced concrete, wherein a first debris filter plate (202), a first impurity filter plate (203), a second impurity filter plate (204), and a third impurity filter plate (205) are sequentially connected in the grid filter pool (201) from top to bottom.

4. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The filter pool (3) comprises a filter pool body (301), the top of the filter pool body (301) is connected to a second debris filter plate (302), and the filter pool body (301) is paved with fine sand (303), coarse sand (304), small stones (305), and large stones (306) in sequence from top to bottom.

5. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The sedimentation pumping tank (4) is a grid sedimentation tank.

6. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The top of the tank body (801) is connected to a flow monitoring device (814), which is a flow meter. The hydrostatic housing (810) is connected to a temperature sensor (812) and a water quality monitor (813). The temperature sensor (812), the water quality monitor (813), and the flow monitoring device (814) are respectively connected to an external intelligent display device.

7. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The large sand filter tank water supply and drainage system also includes a sewage treatment system, which includes a sedimentation return water treatment tank (7) connected to the user's seedling breeding pond (12) through a pipeline, and the sedimentation return water treatment tank (7) is connected to external seawater through a drainage channel (6).

8. A large sand filter tank water supply and drainage system according to claim 7, characterized in that: The sedimentation return water treatment tank (7) is a filtration treatment tank equipped with a sludge filter press device.

9. A large sand filter tank water supply and drainage system according to claim 1, characterized in that: The early purification and filtration system and the water replenishment system are installed underground or on the ground, the large sand filter tank (8) and the water supply system are installed on the ground, a building (13) is built outside the large sand filter tank (8) and the water supply system, and the top of the building (13) is connected to a photovoltaic power generation system (14), and the photovoltaic power generation system (14) is used to supply power to electrical equipment in all systems.

10. A large sand filter tank water supply and drainage system according to claim 9, characterized in that: The photovoltaic power generation system (14) is a photovoltaic panel power generation system.