Large sand filter tank water supply and drainage system

Abstract

The invention 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.

Description

Technical Field

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

[0002] In the onshore marine seedling breeding, most of the aquaculture water replenishment work is completed through the beach well digging water intake system. The beach well digging water intake system is to dig a well on the beach, using the natural filtering effect of the beach and the water storage capacity of the underground aquifer to obtain a relatively clean water source. The seawater will penetrate into the beach at high tide, and the impurities in it will be removed after being filtered by the sand layer. Part of the seawater will be stored in the aquifer under the beach. After digging the well, the filtered water will be extracted by water pumps and other equipment for various needs. Although the existing beach well digging water intake system can obtain relatively clean seawater at a low cost, there are many restrictions on digging wells, which cannot be widely promoted and used. At the same time, the water supply of digging wells is small, which cannot be applied to large-scale seawater seedling breeding. Moreover, the beach is a red line of the country. The existing beach well digging water intake system has the problem of indiscriminate discharge of sewage, which seriously pollutes the surrounding environment of the breeding area and causes a lot of economic losses.

[0003] In order to solve the serious water shortage problem in onshore seawater seedling cultivation in the prior art, a plurality of sand filter tanks are generally equipped with a well-drilling water intake system to complete the replenishment of aquaculture water. 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 and 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. Summary of the invention

[0005] In order to solve the above problems, especially to address the deficiencies in the prior art, the present invention provides a large sand filter tank water supply and drainage system that can solve the above problems.

[0006] To achieve the above purpose, the present invention adopts the following technical means:

[0007] A large sand filter tank water supply and drainage system, including a preliminary 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 comprises 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 a 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 comprises a tank body, the top of the tank body is connected to a water inlet connected to a water pump for replenishing seawater into the tank body, the bottom of the tank body is connected to a hydrostatic shell for storing filtered seawater, the tank body is sequentially connected from top to bottom with a water diversion channel for diverting seawater, a filter plate for filtering seawater in the first pass, a fine sand filter area for filtering seawater in the second pass, a coarse sand filter area for filtering seawater in the third pass, a gravel filter area for filtering seawater in the fourth pass, and a dehydration plate for separating and filtering seawater, and the side of the hydrostatic shell is connected with a water outlet for discharging filtered seawater and a sampler for sampling 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 as sealing planes and surrounding 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 tank comprises a filter tank body, a second debris filter plate is connected to the top of the filter tank body, and fine sand, coarse sand, small stones and large stones are laid in the filter tank body from top to bottom in sequence.

[0015] A further solution of the present invention is that the sedimentation pumping tank is a lattice 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 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 invention is that the preliminary 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, a building is constructed 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 present invention:

[0022] 1. The system of the present invention purifies and filters seawater through multiple channels and multiple filtering methods, so that the seawater reaches certain indicators and quality and is supplied to various seedling breeding on the shore. It can filter a large amount of refined and practical seawater, and change the problem of difficult water intake and severe water shortage in the aquaculture industry.

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

[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 the present invention is not affected by external environment such as tides, wind and waves, which saves trouble and makes water use safe, effectively improving water supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the coarse filtration water inlet tank, the filtration tank, and the sedimentation pumping tank of the present invention;

[0028] Figure 3 is a cross-sectional view of a coarse filtration water inlet pool of the present invention;

[0029] Figure 4 is a cross-sectional view of the filter tank of the present invention;

[0030] Figure 5It is a schematic diagram of the connection between the sedimentation and water return treatment tank of the present invention and the user's seedling breeding pool;

[0031] Figure 6 It is a structural schematic diagram of a large sand filter tank of the present invention;

[0032] Figure 7 This is a schematic diagram of the connection between the water supply pool of the present invention 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 filter area 805, coarse sand filter area 806, stone filter 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 technical solution of the present invention will be described clearly and completely below 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 creative work 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 a preliminary 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, and 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 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 sampler 811 for sampling filtered seawater;

[0041] The water supply system includes a water supply tank 9 connected to the water outlet 809 of the large sand filter tank 8, and the water supply tank 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 pipeline 11.

[0042] Working principle:

[0043] First, a water intake head 15 is set at a place where the lowest water level is about ten meters near the coast, and then the water is led to the rough filtration water inlet pool 2 on the shore through the water diversion channel 1. The seawater filtered by the rough filtration water inlet pool 2 flows into the filter pool 3 through a pipeline for filtration. The seawater filtered by the filter pool 3 flows into the sedimentation pumping pool 4 through a pipeline. After the above-mentioned multi-channel scientific purification and filtration work, the seawater in the sedimentation pumping pool 4 is pumped into the large sand filter tank 8 by the pumping pump 5. The large sand filter tank 8 is finely filtered by 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 the water to the user seedling breeding pool 12 of the breeder through the second water supply pump 10. At the same time, the rough filtration water inlet pool 2 also supplies the user seedling breeding pool 12 of the breeder 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 use problem of the breeder. 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 a preliminary 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, and 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 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 sampler 811 for sampling filtered seawater;

[0049] The water supply system includes a water supply tank 9 connected to the water outlet 809 of the large sand filter tank 8, and the water supply tank 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 pipeline 11.

[0050] The water inlet end of the water diversion channel 1 is connected to a water intake head 15, which is a three-dimensional structure with sealed upper and lower surfaces and water inlet surfaces all around. The upper surface is to prevent floating objects from being sucked in, prevent vortex-type water inflow, and cause harm to the environment, and the lower surface is to prevent mud and sand from being sucked in. This arrangement can effectively improve the working efficiency and working effect of the water intake head 15.

[0051] The coarse filtration water inlet pool 2 includes a grid filter pool 201 constructed of reinforced concrete, and the grid filter pool 201 is sequentially connected with 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 from top to bottom. The newly-incoming seawater is relatively dirty and contains a lot of debris and impurities. The first debris filter plate 202 can effectively filter out larger debris in the seawater, and the first, second, and third impurity filter plates can effectively filter out more impurities in the seawater. Its function is to provide clean water to the large sand filter tank 8, so that the large sand filter tank 8 can be used for a long time, save costs, and more importantly, ensure that the water quality supplied by the large sand filter tank 8 meets the standards and maintains the water supply.

[0052] The filter pool 3 includes a filter pool body 301, and a second debris filter plate 302 is connected to the top of the filter pool body 301. Fine sand 303, coarse sand 304, small stones 305, and large stones 306 are laid in the filter pool body 301 from top to bottom. The second debris filter plate 302 plays a role in filtering debris and buffering the fine sand 303 below to prevent the fine sand 303 from being dispersed by the incoming water and thus uneven. The fine sand 303 and the coarse sand 304 can filter silt impurities in the water, the small stones 305 can be used as a cushion to prevent the coarse sand 304 from leaking, and the large stones 306 can play a role in dehydration.

[0053] The sedimentation 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 being worn, effectively guaranteeing the service life of the water pump 5, effectively reducing the use cost of the water pump 5, and ensuring that the seawater pumped out by the water pump 5 can always remain clean.

[0054] The top of the tank body 801 is connected with a flow monitoring device 814, which is a flow meter. The hydrostatic housing 810 is connected with 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. The temperature sensor 812 can monitor the temperature of the outlet water at all times, the water quality monitor 813 can monitor the quality of the filtered water, and the flow monitoring device 814 can monitor the flow of the inlet water at all times, effectively improving the working efficiency and working effect of the large sand filter tank 8.

[0055] Example 3

[0056] A large sand filter tank water supply and drainage system, comprising a preliminary 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, and 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 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 sampler 811 for sampling filtered seawater;

[0060] The water supply system includes a water supply tank 9 connected to the water outlet 809 of the large sand filter tank 8, and the water supply tank 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 pipeline 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 nursery and breeding pool 12 through a pipeline, and the sedimentation return water treatment tank 7 is connected to the external seawater through a drainage channel 6. This arrangement can prevent the liquid discharged from the user's nursery and breeding pool 12 from polluting the environment, and effectively improve the environmental protection performance of the system.

[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 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, and a building 13 is built outside the large sand filter tank 8 and the water supply system. The top of the building 13 is connected to a photovoltaic power generation system 14, which is used to power all electrical equipment in the system. The setting of the building 13 can effectively protect the large sand filter tank 8 and the water supply system, and the setting of the photovoltaic power generation system 14 can effectively reduce the electricity cost.

[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 given in the present invention are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A large sand filter tank water supply and drainage system, characterized in that: It includes a preliminary purification and filtration system, a water replenishment system, a large sand filter tank (8), and a 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 groups of first water supply pumps (17), the first water supply pumps (17) being connected to a user's seedling breeding pool (12) via a first water supply pipeline (16); The water replenishment system comprises 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); 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 sampler (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 breeding pool (12) via a second water supply pipeline (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 from top to bottom in the grid filter pool (201).

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 shell (810) is connected to a temperature sensor (812) and a water quality monitor (813), and 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 preliminary 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.

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