High-speed hydraulic turbine-based water purification, energy storage, and power generation system for high-rise riverside buildings.

Abstract

This invention discloses a high-speed hydraulic turbine-based water purification and energy storage power generation system and method for high-rise buildings along rivers. The water inlet at the top of the purification tank is connected to a water pump via a two-way pipe B. The water pump is connected to the river via a two-way pipe A. The water outlet at the bottom of the purification tank is connected to a hydraulic turbine via a three-way pipe A. The two ends of the rotating shaft in the hydraulic turbine are coaxially connected to the output shaft of a motor and the impeller, respectively. The hydraulic turbine is connected to a water storage device via the three-way pipe B. The internal cavity of the water storage tank is a water storage chamber. The water inlet and outlet are located at the top and bottom of the water storage tank, respectively. A sealed top cover is connected to the top of the water storage tank, and a handle is installed on the sealed top cover. A ladder is installed inside the water storage chamber. This invention enhances the flow and water purification efficiency of urban rivers, is suitable for low-flow, high-energy-surplus conditions in high-rise buildings along rivers, and achieves the purpose of purifying urban river water and generating electricity through energy storage.

Description

Technical Field

[0001] This invention relates to a water purification and energy storage power generation system and method at the intersection of urban inland river purification technology and pumped storage power generation technology, and in particular to a water purification and energy storage power generation system and method for high-rise buildings along rivers using high-speed hydraulic turbines. Background Technology

[0002] With the rapid development of the national economy and the continuous expansion of urban areas, waterways have been severely encroached upon, leading many cities to undertake large-scale renovations of their inland rivers. However, due to improper design and renovation, while the aesthetics of these rivers have been improved, their self-purification capacity has been severely reduced. Currently, many urban rivers in my country suffer from serious pollution problems. Excessive levels of nitrogen, phosphorus, and heavy metals in the water have led to eutrophication, causing fish and shrimp to die from lack of oxygen, disrupting the river's ecosystem, and further weakening its self-purification capacity. The pollution of urban rivers severely hinders the construction of "three beauties" (beauty, aesthetics, and functionality) in modern cities. Therefore, researching how to purify the water quality of urban rivers has significant engineering background and research value.

[0003] Currently, urban river water purification methods are broadly categorized into two types: physicochemical methods and biological-ecological methods. These include various approaches such as source interception, environmental water diversion and flushing, addition of biological agents, and aeration. Most existing urban river water purification technologies and patents revolve around these methods. However, source interception methods are limited by their high implementation difficulty and investment requirements, making large-scale implementation challenging. Environmental water diversion and flushing methods suffer from high dependence on water conservancy facilities and high costs. The addition of biological agents is hampered by short-lasting effects and the difficulty in completely controlling the harmlessness of the agents to the water body. Aeration methods, in relatively enclosed water bodies like urban rivers, are limited by poor water flow and cannot be fully effective. Therefore, based on these issues, a water purification system is needed to enhance the flow of urban river water, while also considering purification capacity and ensuring it is harmless to the aquatic ecosystem.

[0004] The increasingly fast pace of modern society has led to a more polarized trend in urban electricity consumption patterns, with peak, off-peak, and valley periods becoming more pronounced. Furthermore, as cities continue to develop and expand, the total demand for electricity is increasing year by year. During off-peak periods, clean and renewable energy sources like hydropower generate excess electricity, which is wasted due to the inability to store it. Conversely, during peak periods, the electricity generated by clean and renewable energy sources like hydropower cannot meet the demand, necessitating supplementary power generation from non-clean and non-renewable energy sources such as thermal power, which is detrimental to achieving the national goal of "zero net emissions" clean energy development. Developing pumped storage technology using urban river hydropower resources can effectively reduce energy waste during off-peak periods and supplement power supply during peak periods, while also enhancing the city's flood control capabilities. However, existing traditional large-scale pumped storage power stations, which rely on dams for energy storage, have stringent terrain requirements, making them unsuitable for urban pumped storage operations. Furthermore, traditional pumped-storage power stations suffer from drawbacks such as complex structure, large size, high cost, and high maintenance fees, making them unsuitable for applications involving low flow rates and high head, such as those used in high-rise buildings along urban rivers. Utilizing a pump operating in both forward and reverse rotation to create a high-speed hydraulic turbine not only eliminates the strong dependence of traditional pumped-storage power stations on terrain but also offers advantages such as simple structure, small size, and low cost, which are significant differences from traditional pumped-storage power stations. Therefore, based on the aforementioned issues, current technology lacks a pumped-storage system based on high-speed hydraulic turbine technology suitable for low flow rate, high head conditions in high-rise buildings along urban rivers. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, the purpose of this invention is to provide a high-speed hydraulic turbine water purification and energy storage power generation system and method for high-rise buildings along rivers, so as to improve the water purification efficiency and water energy resource utilization efficiency of urban rivers, and further develop the existing technology in the field of small flow and high lift hydropower.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] I. High-speed hydraulic turbine-based water purification, energy storage, and power generation system for high-rise riverside buildings:

[0008] It includes a water purification system, a hydraulic turbine, and a water storage device. The water purification system and the hydraulic turbine are placed on the ground, while the water storage device is placed on the roof of the building. The water purification system is connected to the water storage device through the hydraulic turbine.

[0009] The water purification mechanism includes a water purification tank and a water pump. The water purification tank is fixed on the ground. The water inlet of the water purification tank on the top side of the water purification tank is connected to one end of the water pump via a two-way pipe B. A valve A is provided at the connection position between the two-way pipe B and the water inlet of the water purification tank. The other end of the water pump is connected to a river via the two-way pipe A.

[0010] The water outlet of the water purification tank at the bottom of the other side of the water purification tank is connected to the hydraulic turbine equipment via a three-way pipe A. A valve B is installed at the connection point between the three-way pipe A and the water outlet of the water purification tank. The lower end of the three-way pipe A is connected to the river, and a valve C is installed at the port where the three-way pipe A connects to the river.

[0011] The hydraulic turbine includes a housing, a motor, an impeller, and a shaft. One end of the shaft is coaxially connected to the output shaft of the motor, and the other end of the shaft passes through the housing and is fixedly connected to the housing. The impeller is located inside the housing and is coaxially connected to the shaft. Both ends of the housing are provided with openings, which serve as the equipment inlet and equipment outlet of the hydraulic turbine, respectively.

[0012] The equipment inlet is connected to the water purification unit via a three-way pipe A, and the equipment outlet is connected to the water storage device via a three-way pipe B.

[0013] The water storage device includes a water storage tank, a ladder, a sealed top cover, and a top cover handle; the internal cavity of the water storage tank is a water storage chamber for storing liquid, the water inlet and water outlet of the water storage tank are located at the top and bottom of one side of the water storage tank, respectively, the sealed top cover is connected to the top of the other side of the water storage tank, the top cover handle is fixedly installed on the sealed top cover, and the ladder is located below the sealed top cover and installed in the water storage chamber;

[0014] The outlet of the hydraulic turbine is connected to the inlet and outlet of the water storage tank via a three-way pipe B. A valve E is installed at the connection point between the bottom of the three-way pipe B and the outlet of the equipment, a valve G is installed at the connection point between the middle of the three-way pipe B and the outlet of the water storage tank, and a valve F is installed at the connection point between the top of the three-way pipe B and the inlet of the water storage tank.

[0015] The water purification tank includes a tank shell, a quartz sand filter layer, an activated carbon filter layer, and a reverse osmosis layer. The tank shell is made of stainless steel. The quartz sand filter layer, activated carbon filter layer, and reverse osmosis layer are installed inside the tank shell in a top-to-bottom order.

[0016] The water storage tank is a reinforced concrete-steel concrete hybrid structure, and the concrete material used in the water storage tank is waterproof concrete.

[0017] The inner wall of the water storage tank is coated with stainless steel, and the escalator, sealed top cover, and top cover handle are all made of stainless steel.

[0018] II. A method for energy storage, power generation, and water purification applied to the system described above:

[0019] The method is divided into three working modes: water purification-pumped storage mode, power generation mode, and water purification mode. The three working modes operate under different power grid load periods.

[0020] When the power grid is in off-peak load periods, the water purification-pumped storage mode is implemented:

[0021] Valves A, B, D, E, and F are opened, while valves C and G are closed. The water pump draws the river water into the purification tank for purification. The purified river water then flows into the hydraulic turbine through the three-way pipe A. At this time, the hydraulic turbine is in pump operation mode. The hydraulic turbine draws the river water from the water inlet of the storage tank into the storage tank of the storage device for storage.

[0022] When the power grid is in peak load period, the power generation mode is activated:

[0023] Valve C, valve D, valve E, and valve G are open, while valves A, B, and F are closed. Water in the storage tank flows out from the outlet of the storage tank and enters the hydraulic turbine equipment along the three-way pipe B. At this time, the hydraulic turbine equipment is in hydraulic turbine working mode. Water flowing out of the hydraulic turbine equipment flows into the river from valve C along the three-way pipe A.

[0024] When the power grid is under normal load, the water purification mode is activated.

[0025] Valves A, B, and C are opened, while valves D, E, F, and G are closed. The water pump draws river water into the purification tank for purification, and the purified river water flows into the river from valve C along the three-way pipe A.

[0026] This invention can improve the water purification efficiency and hydropower resource utilization efficiency of urban rivers. The system involves the intersection of urban river purification technology and pumped storage power generation technology, and is particularly suitable for low-flow, high-surplus energy conditions for high-rise buildings near rivers.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. The process of pumping and releasing water can enhance the flow of the river. Increased water flow can increase the oxygen content in the river, thereby improving the river's self-purification capacity.

[0029] 2. The method of this invention does not involve biochemical reactions and is relatively safe;

[0030] 3. This invention combines water purification and pumped storage power generation methods. The water purification process can effectively help solve the problem of water purification difficulties caused by poor flow in urban rivers, while the pumped storage power generation process can effectively alleviate the high load on the power grid during peak hours in urban areas. This system is particularly suitable for low-flow, high-energy-surplus conditions in high-rise buildings near rivers.

[0031] 4. This invention can enhance the flow rate and water purification efficiency of urban rivers, further develop the technology of pumped storage in the field of low flow and high head conditions such as high-rise buildings along urban rivers, and achieve the purpose of purifying urban river water and generating electricity through energy storage. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic cross-sectional view of the water purification device in this invention;

[0034] Figure 3 This is a schematic cross-sectional view of the radial high-speed hydraulic turbine device in this invention;

[0035] Figure 4 This is a schematic cross-sectional view of the water storage device in this invention;

[0036] Figure 5 This is a schematic diagram of the three working modes of the present invention;

[0037] The components are as follows: 1. Two-way pipe A; 2. Water pump; 3. Two-way pipe B; 4. Valve A; 5. Clean water tank; 6. Valve B; 7. Three-way pipe A; 8. Valve D; 9. Valve C; 10. Flange; 11. Hydraulic turbine equipment; 12. Valve E; 13. Three-way pipe B; 14. Valve G; 15. Valve F; 16. Water storage device; 17. Top cover handle; 18. Sealed top cover; 19. Clean water tank inlet; 20. Tank shell; 21. Clean water tank outlet; 22. Quartz sand filter layer; 23. Activated carbon filter layer; 24. Reverse osmosis layer; 25. Equipment inlet; 26. Motor; 27. Impeller; 28. Shaft; 29. ​​Equipment outlet; 30. Water storage tank inlet; 31. Water storage tank outlet; 32. Water storage tank; 33. Water storage chamber; 34. Ladder; 35. Shell. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1As shown, the system includes a water purification mechanism, a hydraulic turbine 11, and a water storage device 16. Both the water purification mechanism and the hydraulic turbine 11 are placed on the ground, while the water storage device 16 is placed on the roof of the building. The water purification mechanism is connected to the water storage device 16 via the hydraulic turbine 11. The hydraulic turbine 11 is a radial high-speed hydraulic turbine. Based on high-speed hydraulic turbine technology, the hydraulic turbine 11 operates by rotating a pump in both forward and reverse directions to perform energy storage and power generation tasks.

[0040] like Figure 2 As shown, the water purification mechanism includes a water purification tank 5 and a water pump 2. The water purification tank 5 is fixed on the ground. The water inlet 19 on the top side of the water purification tank 5 is connected to one end of the water pump 2 via a two-way pipe B3. A valve A4 is provided at the connection position between the two-way pipe B3 and the water inlet 19. The other end of the water pump 2 is connected to the river via a two-way pipe A1. Both the two-way pipe A1 and the two-way pipe B3 are connected to both ends of the water pump 2 via flanges 10.

[0041] The water outlet 21 of the water purification tank 5 on the other side of the bottom is connected to the hydraulic turbine 11 via a three-way pipe A7. A valve B6 is provided at the connection point between the three-way pipe A7 and the water outlet 21. The lower end of the three-way pipe A7 is connected to the river, and a valve C9 is provided at the port of the three-way pipe A7 that is connected to the river.

[0042] Pump 2 draws river water from the river into the water purification tank 5 through the water inlet 19 using the pumping principle. After being purified by the water purification tank 5, the river water flows into the three-way pipe A7 from the water outlet 21.

[0043] like Figure 3 As shown, the hydraulic turbine 11 includes a housing 35, a motor 26, an impeller 27, and a rotating shaft 28. One end of the rotating shaft 28 is coaxially connected to the output shaft of the motor 26, and the other end of the rotating shaft 28 passes through the housing 35 and is fixedly connected to the housing 35. The impeller 27 is located inside the housing 35 and is coaxially connected to the rotating shaft 28. The motor 26 is used to drive the impeller to rotate. Both ends of the housing 35 are provided with openings, which serve as the equipment inlet 25 and equipment outlet 29 of the hydraulic turbine 11, respectively.

[0044] The equipment inlet 25 is connected to the water purification tank 5 of the water purification mechanism via a three-way pipe A7, and the equipment outlet 29 is connected to the water storage device 16 via a three-way pipe B13.

[0045] The hydraulic turbine device 11 has a pump working mode and a hydraulic turbine working mode. In the pump working mode, the impeller 27 in the hydraulic turbine device 11 rotates counterclockwise to pump water into the water storage device 16 for energy storage. In the hydraulic turbine working mode, the impeller 27 in the hydraulic turbine device 11 rotates clockwise to generate electricity.

[0046] like Figure 4 As shown, the water storage device 16 includes a water storage tank 32, a ladder 34, a sealed top cover 18, and a top cover handle 17; the internal cavity of the water storage tank 32 is a water storage chamber 33 for storing liquid, the water inlet 30 and the water outlet 31 of the water storage tank are located at the top and bottom of one side of the water storage tank 32, respectively, the sealed top cover 18 is connected to the top of the other side of the water storage tank 32, the top cover handle 17 is fixedly installed on the sealed top cover 18, and the ladder 34 is located below the sealed top cover 18 and installed inside the water storage chamber 33;

[0047] The equipment outlet 29 of the hydraulic turbine equipment 11 is connected to the water inlet 30 and the water outlet 31 of the storage tank via a three-way pipe B13. A valve E12 is installed at the connection point between the bottom of the three-way pipe B13 and the equipment outlet 29, a valve G14 is installed at the connection point between the middle of the three-way pipe B13 and the water outlet 31 of the storage tank, and a valve F15 is installed at the connection point between the top of the three-way pipe B13 and the water inlet 30 of the storage tank.

[0048] Both tee pipes A7 and B13 are connected to the two ends of the hydraulic turbine equipment 11 via flanges 10.

[0049] The water purification tank 5 includes a tank shell 20, a quartz sand filter layer 22, an activated carbon filter layer 23, and a reverse osmosis layer 24. The tank shell 20 is made of stainless steel. The quartz sand filter layer 22, the activated carbon filter layer 23, and the reverse osmosis layer 24 are welded and installed inside the tank shell 20 in a top-to-bottom order. The quartz sand filter layer 22, the activated carbon filter layer 23, and the reverse osmosis layer 24 are located at three-quarters, one-half, and one-quarter of the height of the tank shell 5, respectively.

[0050] The quartz sand filter layer 22 can remove large particles and other suspended pollutants from the water, reducing turbidity. The activated carbon filter layer 23 utilizes the adsorption properties of activated carbon to adsorb small particulate pollutants and odors that could not be filtered by the previous quartz sand filter layer 22, further reducing the river water pollution index. The reverse osmosis layer 24 uses membrane separation technology to filter out heavy metals, bacteria, and other harmful substances from the water.

[0051] The rotating shaft 28 is connected to the urban power grid. During periods of low load on the power grid, the rotating shaft 28 rotates counterclockwise to consume excess power in the power grid for pumping and energy storage. During periods of high load on the power grid, the rotating shaft 28 rotates clockwise to generate electricity and feed it into the urban power grid to alleviate the power grid load.

[0052] The water storage tank 32 is a reinforced concrete-steel concrete hybrid structure. The steel bars, concrete and steel sections are connected into an integral structure by casting to form the water storage tank 32. The concrete material used for the water storage tank 32 is waterproof concrete.

[0053] The inner wall of the water storage tank 32 is coated with stainless steel to prevent water from corroding and damaging the water storage tank 32. The ladder 34, the sealed top cover 18 and the top cover handle 17 are all made of stainless steel. Maintenance personnel can enter the water storage chamber 33 by opening the sealed top cover 18 and going up the ladder 34.

[0054] Two-way pipes 1 and 3 and three-way pipes 7 and 13 are all stainless steel pipes.

[0055] Pump 2, valves 4, 6, 8, 9, 12, 14, 15 and hydraulic turbine equipment 11 are all controlled by the city power grid.

[0056] A method for energy storage, power generation, and water purification applied to a system is described. The method operates in three modes: a water purification-pumped storage mode, a power generation mode, and a water purification mode. These three modes operate under different grid load periods. Flowcharts for the three modes are shown below. Figure 5 As shown;

[0057] When the power grid is in a low-load period, the water purification-pumped storage mode is implemented:

[0058] River water is pumped into water storage device 16 for energy storage. Valves A4, B6, D8, E12 and F15 are opened, and valves C9 and G14 are closed. Water pump 2 pumps the river water into water purification tank 5 for purification through the pump suction principle. Since valve C9 is closed, the purified river water will flow into hydraulic turbine device 11 along the three-way pipe A7. At this time, hydraulic turbine device 11 is in pump working mode. Hydraulic turbine device 11 pumps the river water from the water inlet 30 into the water storage tank 32 of water storage device 16 for storage.

[0059] When the power grid is in peak load period, the power generation mode is activated:

[0060] The water stored in the water storage device 16 generates electricity to alleviate the supply burden on the urban power grid. When the system is working in power generation mode, the water purification mechanism is in a dormant state. Valves C9, D8, E12 and G14 are open, while valves A4, B6 and F15 are closed. Water in the water storage tank 32 flows out from the water storage tank outlet 31 and enters the hydraulic turbine device 11 along the three-way pipe B13. At this time, the hydraulic turbine device 11 is in hydraulic turbine working mode, and the power generation supply enters the urban power grid. Since valve B6 is closed, the water flowing out of the hydraulic turbine device 11 flows into the river from valve C9 along the three-way pipe A7.

[0061] When the power grid is under normal load, the water purification mode is activated.

[0062] The water purification mode aims to purify the river water in the city. During this period, the water storage device 16 has completed its water storage task. When the system is working in the water purification mode, the water purification mechanism is in an active state, while the hydraulic turbine device 11 and the water storage device 16 are in a dormant state. Valves A4, B6 and C9 are open, while valves D8, E12, F15 and G14 are closed. The water pump 2 draws the river water into the water purification tank 5 for purification. Since valve D8 is closed, the purified river water will flow into the river from valve C9 along the three-way pipe A7.

[0063] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A high-speed hydraulic turbine-based water purification, energy storage, and power generation system for high-rise riverside buildings, characterized in that: It includes a water purification mechanism, a hydraulic turbine (11) and a water storage device (16). The water purification mechanism and the hydraulic turbine (11) are both placed on the ground, and the water storage device (16) is placed on the roof of the building. The water purification mechanism is connected to the water storage device (16) through the hydraulic turbine (11). The water purification mechanism includes a water purification tank (5) and a water pump (2). The water purification tank (5) is fixed on the ground. The water inlet (19) of the water purification tank on the top side of the water purification tank (5) is connected to one end of the water pump (2) via a two-way pipe B (3). A valve A (4) is provided at the connection position between the two-way pipe B (3) and the water inlet (19). The other end of the water pump (2) is connected to the river via a two-way pipe A (1). The water outlet (21) at the bottom of the other side of the water tank (5) is connected to the hydraulic turbine (11) via a three-way pipe A (7). A valve B (6) is provided at the connection point between the three-way pipe A (7) and the water outlet (21). The lower end of the three-way pipe A (7) is connected to the river. A valve C (9) is provided at the port where the three-way pipe A (7) is connected to the river. The hydraulic turbine device (11) includes a housing (35), a motor (26), an impeller (27), and a rotating shaft (28). One end of the rotating shaft (28) is coaxially connected to the output shaft of the motor (26), and the other end of the rotating shaft (28) is inserted into the housing (35) and fixedly connected to the housing (35). The impeller (27) is located inside the housing (35) and coaxially connected to the rotating shaft (28). Both ends of the housing (35) are provided with openings, which serve as the equipment inlet (25) and equipment outlet (29) of the hydraulic turbine device (11), respectively. The equipment inlet (25) is connected to the water purification mechanism via a three-way pipe A (7), and the equipment outlet (29) is connected to the water storage device (16) via a three-way pipe B (13); The water storage device (16) includes a water storage tank (32), a ladder (34), a sealed top cover (18), and a top cover handle (17); the internal cavity of the water storage tank (32) is a water storage chamber (33) for storing liquid. The water inlet (30) and the water outlet (31) of the water storage tank are located at the top and bottom of one side of the water storage tank (32), respectively. The sealed top cover (18) is connected to the top of the other side of the water storage tank (32). The top cover handle (17) is fixedly installed on the sealed top cover (18). The ladder (34) is located below the sealed top cover (18) and installed in the water storage chamber (33). The equipment outlet (29) of the hydraulic turbine equipment (11) is connected to the water inlet (30) and the water outlet (31) of the water storage tank via a three-way pipe B (13). A valve E (12) is provided at the connection position between the bottom of the three-way pipe B (13) and the equipment outlet (29). A valve G (14) is provided at the connection position between the middle of the three-way pipe B (13) and the water outlet (31) of the water storage tank. A valve F (15) is provided at the connection position between the top of the three-way pipe B (13) and the water inlet (30) of the water storage tank. The water purification tank (5) includes a tank shell (20), a quartz sand filter layer (22), an activated carbon filter layer (23), and a reverse osmosis layer (24). The tank shell (20) is made of stainless steel. The quartz sand filter layer (22), the activated carbon filter layer (23), and the reverse osmosis layer (24) are installed inside the tank shell (20) in a top-to-bottom order.

2. The high-speed hydraulic turbine-based water purification and energy storage power generation system for high-rise riverside buildings according to claim 1, characterized in that: The water storage tank (32) is a reinforced concrete-steel concrete hybrid structure, and the concrete material used in the water storage tank (32) is waterproof concrete; The inner wall of the water storage tank (32) is coated with stainless steel, and the escalator (34), the sealed top cover (18) and the top cover handle (17) are all made of stainless steel.

3. A method for energy storage, power generation, and water purification applied to the system described in any one of claims 1-2, characterized in that: The method is divided into three working modes: water purification-pumped storage mode, power generation mode, and water purification mode. The three working modes operate under different power grid load periods. When the power grid is in off-peak load periods, the water purification-pumped storage mode is implemented: Valve A (4), valve B (6), valve D (8), valve E (12) and valve F (15) are opened, valve C (9) and valve G (14) are closed, and water pump (2) draws river water into the water purification tank (5) for purification. The purified river water will flow into the hydraulic turbine (11) along the three-way pipe A (7). At this time, the hydraulic turbine (11) is in pump working mode. The hydraulic turbine (11) draws river water from the water tank inlet (30) into the water storage tank (32) of the water storage device (16) for storage. When the power grid is in peak load period, the power generation mode is activated: Valve C (9), valve D (8), valve E (12) and valve G (14) are opened, and valve A (4), valve B (6) and valve F (15) are closed. Water in the water storage tank (32) flows out from the water outlet (31) of the water storage tank and enters the hydraulic turbine equipment (11) along the three-way pipe B (13). At this time, the hydraulic turbine equipment (11) is in the hydraulic turbine working mode. The water flowing out of the hydraulic turbine equipment (11) flows into the river from valve C (9) along the three-way pipe A (7). When the power grid is under normal load, the water purification mode is activated. Valves A (4), B (6) and C (9) are opened, and valves D (8), E (12), F (15) and G (14) are closed. The water pump (2) draws the river water into the water purification tank (5) for purification. The purified river water will flow into the river from valve C (9) through the three-way pipe A (7).

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