An energy conversion control system

Abstract

This invention provides an energy conversion control system, relating to the field of power plant wastewater treatment technology. The energy conversion control system includes: a raw water tank for storing and discharging desulfurization wastewater; a reverse osmosis unit for concentrating the desulfurization wastewater to generate permeate and a first concentrate; a pressure regulating device that uses the first concentrate to regulate the pressure of the desulfurization wastewater discharged from the raw water tank to become the first desulfurization wastewater, and sends the first desulfurization wastewater into the reverse osmosis unit via a pressure regulating pipeline group and a first pipeline; a rotary control valve for controlling the first concentrate to enter the pressure regulating device via a third pipeline and controlling the second concentrate to be discharged from the pressure regulating device; and a vacuum breaking valve connected to the outlet of the rotary control valve via a drainage pipeline for drawing in air to break the vacuum created in the drainage pipeline. The energy conversion control system provided by this invention solves the problem of energy waste caused by the discharge of the first concentrate generated during the desulfurization wastewater treatment process through valve regulation or pressure reduction by a flow-limiting orifice plate in the prior art.

Description

Technical Field

[0001] This invention relates to the field of power plant wastewater treatment technology, specifically to an energy conversion control system. Background Technology

[0002] Currently, the standards for wastewater discharge are very stringent, elevating water environmental protection to the level of a national strategy. Power plants, as major water and wastewater users, account for 20% of total industrial water consumption. From multiple perspectives, cascade utilization, concentration and reduction, and water conservation are of great significance for power plants to achieve zero discharge of desulfurization wastewater. Currently, in the field of zero-discharge treatment of desulfurization wastewater, membrane concentration and reduction is the main process. The TDS of desulfurization wastewater is typically around 50,000 ppm. After multi-stage reverse osmosis membrane concentration, the concentrated wastewater's TDS can reach 100,000 ppm. This concentrated wastewater is then sent to a crystallization evaporation and drying process to ultimately form crystalline salt solids.

[0003] Currently, in the desulfurization wastewater treatment process, the incoming wastewater is typically pressurized to 100% and pumped into a high-pressure pump. This pressure is then further increased before entering the reverse osmosis system. Through the concentration and separation effect of the reverse osmosis membrane, a portion is concentrated into high-TDS high-pressure concentrate. To overcome the osmotic pressure of the high-TDS desulfurization wastewater, the reverse osmosis system requires a very high inlet pressure (50-120 bar). After concentration by reverse osmosis, the pressure of the high-TDS concentrate often decreases by 1-2 bar. This high-pressure concentrate from the reverse osmosis system is then depressurized using valve regulation or flow-limiting orifice plates, typically to below 10 bar, becoming low-pressure concentrate. This low-pressure concentrate is then discharged into the crystallization evaporation and drying process. This process results in inefficient use of the concentrate's energy, leading to energy waste. Therefore, a system to solve these problems is urgently needed. Summary of the Invention

[0004] The purpose of this invention is to provide an energy conversion control system to solve the problem of energy waste caused by the discharge of the first concentrated water generated during the treatment of desulfurization wastewater in the prior art after being regulated by valves or depressurized by flow-limiting orifice plates.

[0005] To achieve the above objectives, the present invention provides an energy conversion control system, the energy conversion control system comprising:

[0006] The raw water tank has a first water tank outlet and a second water tank outlet, which are used to store and discharge desulfurization wastewater.

[0007] The reverse osmosis device has a first inlet, a second outlet and a third outlet. The first inlet is connected to the outlet of the first water tank through a first pipe. The reverse osmosis device is used to concentrate desulfurization wastewater to generate product water and a first concentrate. The product water is discharged through the second outlet and the first concentrate is discharged through the third outlet.

[0008] The pressure regulating device is connected to the first pipeline via a pressure regulating pipeline group, to the outlet of the second water tank via a second pipeline group, and to the third outlet via a third pipeline. The pressure regulating device uses the first concentrated water discharged from the third outlet to regulate the pressure of the desulfurization wastewater discharged from the outlet of the second water tank through the raw water tank to become the first desulfurization wastewater. The first concentrated water after depressurization becomes the second concentrated water. The first desulfurization wastewater is sent into the reverse osmosis device through the pressure regulating pipeline group and the first pipeline.

[0009] A rotary control valve is installed on the third pipeline to control the first concentrated water to enter the pressure regulating device through the third pipeline and to control the second concentrated water to be discharged from the pressure regulating device.

[0010] The vacuum breaking component, connected to the outlet of the rotary control valve via a drain pipe, is used to draw in air to break the vacuum created in the drain pipe.

[0011] Specifically, the pressure regulating device includes: a first water pressure cylinder and a second water pressure cylinder;

[0012] The first water pressure cylinder has a first pressure regulating water inlet, a second pressure regulating water inlet and a third pressure regulating water inlet. The first pressure regulating water inlet is connected to the first pipe through a pressure regulating pipe group. The second pressure regulating water inlet is connected to the outlet of the second water tank through a second pipe group. The third pressure regulating water inlet is connected to the third water outlet through a third pipe.

[0013] The second water pressure cylinder has a fourth pressure regulating port, a fifth pressure regulating port and a sixth pressure regulating port. The fourth pressure regulating port is connected to the first pipe through a pressure regulating pipe group. The fifth pressure regulating port is connected to the outlet of the second water tank through a second pipe group. The sixth pressure regulating port is connected to the third outlet through a third pipe.

[0014] Both the first water pressure cylinder and the second water pressure cylinder are used to adjust the pressure of the desulfurization wastewater discharged from the outlet of the second water tank through the raw water tank using the first concentrated water to become the first desulfurization wastewater. The first desulfurization wastewater is sent into the reverse osmosis device through the pressure regulating pipeline group and the first pipeline.

[0015] The rotary control valve includes: a valve body having a valve cavity, wherein a first water inlet hole, a first water outlet hole, a second water inlet hole, a second water outlet hole and an intermediate water inlet hole are provided on the cavity wall of the valve cavity;

[0016] The valve core is rotatably disposed within the valve cavity and is provided with a first water channel, a third water channel, a pair of second water channels, and a pair of fourth water channels. Adjusting the rotation angle of the valve core within the valve cavity allows control over the connection or disconnection of the first water inlet and the first water outlet through the first water channel, the connection or disconnection of the first water inlet and the intermediate water inlet through the corresponding second water channel, the connection or disconnection of the second water inlet and the second water outlet through the third water channel, and the connection or disconnection of the second water inlet and the intermediate water inlet through the corresponding fourth water channel. Buffer grooves are provided at the flow outlets at both ends of the first water channel, the flow outlets at both ends of the third water channel, the flow outlet of the second water channel facing the first water inlet, and the flow outlet of the fourth water channel facing the second water inlet. Vibrations caused by flow rate changes when liquid flows through the flow outlets of the first, second, third, and fourth water channels can be mitigated by the corresponding buffer grooves.

[0017] A control valve actuator is used to drive the valve core to rotate within the valve chamber.

[0018] Specifically, the valve body has a pair of partitions inside its valve cavity, which divide the valve cavity into a first valve cavity, a second valve cavity, and an intermediate valve cavity located between the first valve cavity and the second valve cavity. Each partition has a through hole, and the first valve cavity and the second valve cavity are respectively connected to the intermediate valve cavity through corresponding through holes. The first water inlet hole and the first water outlet hole are opened on the cavity wall of the first valve cavity, the second water inlet hole and the second water outlet hole are opened on the cavity wall of the second valve cavity, and the intermediate water inlet hole is opened on the cavity wall of the intermediate valve cavity.

[0019] Specifically, the valve core includes a connecting shaft and a cylindrical first valve core portion and a second valve core portion; the first valve core portion is rotatably disposed in the first valve cavity, the second valve core portion is rotatably disposed in the second valve cavity, and the connecting shaft is located in the intermediate valve cavity and fixed to the first valve core portion and the second valve core portion; a first water channel and a pair of second water channels are disposed on the first valve core portion, and a third water channel and a pair of fourth water channels are disposed on the second valve core portion; by adjusting the rotation of the valve core, the first water inlet hole and the intermediate water inlet hole are connected or disconnected through the corresponding second water channel, the corresponding through hole and the intermediate valve cavity; the first water inlet hole and the first water outlet hole are connected or disconnected through the first water channel; the second water inlet hole and the intermediate water inlet hole are connected or disconnected through the corresponding fourth water channel, the corresponding through hole and the intermediate valve cavity; and the second water inlet hole and the second water outlet hole are connected or disconnected through the third water channel.

[0020] Specifically, the first waterway and the third waterway are arranged perpendicularly to each other.

[0021] Specifically, a pair of second water channels are arranged symmetrically with respect to the rotation centerline of the first valve core, and a pair of fourth water channels are arranged symmetrically with respect to the rotation centerline of the second valve core.

[0022] Specifically, the first waterway is arranged radially along the first valve core. When the first water inlet and the first water outlet are connected, the flow outlets at both ends of the first waterway are connected to the first water inlet and the first water outlet, respectively.

[0023] Specifically, each second waterway includes: a second radial waterway section and a second axial waterway section communicating with the second radial waterway section; the second radial waterway section is arranged radially along the first valve core, the second axial waterway section is arranged axially along the first valve core, the flow outlet of the second waterway at one end of the second radial waterway section is the second radial water outlet, and the flow outlet of the second waterway at one end of the second axial waterway section is the second axial water outlet; when the first water inlet hole is connected to the intermediate water inlet hole, the second radial water outlet of the second waterway is connected to the first water inlet hole, and the second axial water outlet of the second waterway is connected to the corresponding through hole.

[0024] Specifically, the third waterway is arranged radially along the second valve core. When the second water inlet and the second water outlet are connected, the flow outlets at both ends of the third waterway are connected to the second water inlet and the second water outlet, respectively.

[0025] Specifically, each fourth waterway includes: a fourth radial waterway section and a fourth axial waterway section communicating with the fourth radial waterway section; the fourth radial waterway section is arranged radially along the second valve core, the fourth axial waterway section is arranged axially along the second valve core, the flow port of the fourth waterway at one end of the fourth radial waterway section is the fourth radial water port, and the flow port of the fourth waterway at one end of the second axial waterway section is the fourth axial water port; when the second water inlet hole is connected to the intermediate water inlet hole, the fourth radial water port of the fourth waterway is connected to the second water inlet hole, and the fourth axial water port of the fourth waterway is connected to the corresponding through hole.

[0026] Specifically, the buffer groove is opened along the circumference of the first valve core at the flow outlets at both ends of the first waterway and at the second radial outlets of each second waterway, and along the circumference of the second valve core at the flow outlets at both ends of the third waterway and at the fourth radial outlets of each fourth waterway.

[0027] The energy conversion control system provided by this invention sends desulfurization wastewater from the raw water tank into a reverse osmosis unit for concentration treatment. After concentration, the desulfurization wastewater generates permeable water and a first concentrate. The permeable water is discharged from the second outlet of the reverse osmosis unit and enters other processes, while the first concentrate is discharged from the third outlet of the reverse osmosis unit and enters a pressure regulating device. The pressure regulating device uses the pressure of the first concentrate to adjust the pressure of the desulfurization wastewater discharged from the second outlet of the raw water tank, thereby increasing the pressure of the desulfurization wastewater through the first concentrate, making it a higher-pressure first desulfurization wastewater. The first desulfurization wastewater is then pressure-regulated. The pipeline assembly and the first pipeline enter the reverse osmosis unit, ensuring that the pressure of the desulfurization wastewater entering the unit meets the unit's inlet pressure requirements. The reverse osmosis unit concentrates and reduces the volume of the desulfurization wastewater. To facilitate pressure adjustment of the desulfurization wastewater discharged from the second water tank outlet, a rotary control valve is installed on the third pipeline between the third outlet and the pressure regulating device. This valve controls the first concentrated water to enter the pressure regulating device, thus regulating the pressure of the desulfurization wastewater also entering the device. After depressurization, the first concentrated water becomes the second concentrated water and flows out from the pressure regulating device and the rotary control valve. To prevent vibration or water flow knocking caused by a vacuum in the drainage pipeline, a vacuum breaking component is installed on the drainage pipeline at the outlet of the rotary control valve. This component draws air into the drainage pipeline to break the vacuum, preventing vibration and water flow knocking. The energy conversion system provided by this invention utilizes the pressure energy of the first concentrated water with a certain pressure generated by the reverse osmosis unit to concentrate desulfurization wastewater, thereby improving the energy utilization rate and solving the problem of energy waste caused by the first concentrated water generated in the process of treating desulfurization wastewater being discharged after being regulated by valves or pressure reduced by flow-limiting orifice plates in the prior art.

[0028] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the energy conversion control system provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the rotary control valve in the energy conversion control system provided by the present invention;

[0032] Figure 3 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention in state P1.

[0033] Figure 4 This is a schematic diagram of the rotation of the rotary control valve in the energy conversion control system provided by the present invention;

[0034] Figure 5 yes Figure 4 Diagrams from different angles;

[0035] Figure 6 This is a schematic diagram of the structure of the rotary control valve core after it has been rotated by an angle in the energy conversion control system provided by the present invention;

[0036] Figure 7 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention in state P2.

[0037] Figure 8 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention in the P3 state;

[0038] Figure 9 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention in the P4 state;

[0039] Figure 10 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention in state P5.

[0040] Figure 11 This is a schematic diagram of the valve core of the rotary control valve in the energy conversion control system provided by the present invention;

[0041] Figure 12 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention;

[0042] Figure 13 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system provided by the present invention from another angle;

[0043] Figure 14 This is a cross-sectional view of the valve body of the rotary control valve in the energy conversion control system provided by the present invention.

[0044] Explanation of reference numerals in the attached figures

[0045] 1-Raw water tank; 2-Reverse osmosis unit; 3-Pressure regulating device; 4-Rotary control valve; 5-Vacuum rupture assembly; 51-Vacuum rupture valve; 31-First hydraulic cylinder; 311-First cylinder body; 312-First piston; 313-First left sub-chamber; 314-First right sub-chamber; 32-Second hydraulic cylinder; 33-First pressure regulating port; 34-Second pressure regulating port; 35-Third pressure regulating port; 36-Fourth pressure regulating port; 37-Fifth pressure regulating port; 38-Sixth pressure regulating port; 321-Second cylinder body; 322-Second piston; 323-Second left sub-chamber; 324-Second right sub-chamber; 41-Valve body; 42-Valve core; 43-First valve chamber; 44-Second valve chamber; 45-Intermediate valve chamber; 46-Support bearing; 47-Buffer tank; 48-Control valve actuator; 61-First low-pressure water pump; 62-High-pressure pump; 6 3-Second low-pressure water pump; 64-Booster pump; 410-First water inlet; 411-First water outlet; 412-Second water inlet; 413-Second water outlet; 414-Intermediate water inlet; 415-Baffle plate; 416-Through hole; 421-First water channel; 422-Second water channel; 423-Third water channel; 424-Fourth water channel; 425-Connecting shaft; 426-First valve core; 427-Second valve core Section; 4221-Second radial waterway section; 4222-Second axial waterway section; 4241-Fourth radial waterway section; 4242-Fourth axial waterway section; 91-First pipe; 92-Second pipe group; 921-Second main pipe; 922-Second branch pipe; 93-Third pipe; 95-Pressure regulating pipe group; 951-Pressure regulating main pipe; 952-Pressure regulating branch pipe; 6-First drainage pipe; 7-Second drainage pipe. Detailed Implementation

[0046] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0047] Figure 1 This is a schematic diagram of the energy conversion control system. Figure 2 This is a schematic diagram of the rotary control valve in an energy conversion control system; Figure 3 This is a cross-sectional view of the valve core of the rotary control valve in the P1 state in the energy conversion control system; Figure 4 This is a schematic diagram of the rotation of a rotary control valve in an energy conversion control system; Figure 5 yes Figure 4 Diagrams from different angles; Figure 6 It is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system after it has been rotated by an angle; Figure 7 A cross-sectional view of the valve core of the rotary control valve in the P2 state in an energy conversion control system; Figure 8This is a cross-sectional view of the valve core of the rotary control valve in the P3 state in the energy conversion control system; Figure 9 This is a cross-sectional view of the valve core of the rotary control valve in the P4 state in the energy conversion control system.

[0048] Figure 10 This is a cross-sectional view of the valve core of the rotary control valve in the P5 state in the energy conversion control system. Figure 11 This is a schematic diagram of the valve core of a rotary control valve in an energy conversion control system. Figure 12 This is a cross-sectional view of the valve core of a rotary control valve in an energy conversion control system. Figure 13 This is a cross-sectional view of the valve core of the rotary control valve in the energy conversion control system from another angle. Figure 14 This is a cross-sectional view of the valve body of a rotary control valve in an energy conversion control system.

[0049] like Figures 1-14 As shown, the present invention provides an energy conversion control system, the energy conversion control system comprising:

[0050] Raw water tank 1 has a first water tank outlet and a second water tank outlet, used to store and discharge desulfurization wastewater;

[0051] The reverse osmosis device 2 has a first inlet, a second outlet and a third outlet. The first inlet is connected to the outlet of the first water tank through a first pipe 91. The reverse osmosis device 2 is used to concentrate desulfurization wastewater to generate product water and a first concentrate. The product water is discharged through the second outlet and the first concentrate is discharged through the third outlet.

[0052] The pressure regulating device 3 is connected to the first pipeline 91 via a pressure regulating pipeline group 95, to the outlet of the second water tank via a second pipeline group 92, and to the third outlet via a third pipeline 93. The pressure regulating device 3 uses the first concentrated water discharged from the third outlet to regulate the pressure of the desulfurization wastewater discharged from the outlet of the second water tank of the raw water tank 1 to become the first desulfurization wastewater. The first concentrated water after depressurization becomes the second concentrated water. The first desulfurization wastewater is sent into the reverse osmosis device 2 via the pressure regulating pipeline group 95 and the first pipeline 91.

[0053] A rotary control valve 4 is installed on the third pipe 93 and is used to control the first concentrated water to enter the pressure regulating device 3 through the third pipe 93 and to control the second concentrated water to be discharged from the pressure regulating device 3.

[0054] The vacuum breaking component 5 is connected to the outlet of the rotary control valve 4 via a drain pipe and is used to draw in air to break the vacuum that appears in the drain pipe.

[0055] The energy conversion control system provided by this invention discharges a portion of the desulfurization wastewater from the outlet of the first water tank 1 and sends it through the first pipeline 91 into the reverse osmosis unit 2, such as... Figure 1 As shown, a first low-pressure water pump 61 and a high-pressure pump 62 are sequentially installed on the first pipeline 91. The first low-pressure water pump 61 and the high-pressure pump 62 send the desulfurization wastewater discharged from the first water tank outlet of the raw water tank 1 into the reverse osmosis unit 2. The high-pressure pump 62 increases the pressure of the desulfurization wastewater pumped by the first low-pressure water pump 61, ensuring that the pressure of the desulfurization wastewater meets the inlet pressure requirements of the reverse osmosis unit 2. The reverse osmosis unit 2 concentrates the incoming desulfurization wastewater to generate permeable water and a first concentrate. The first concentrate is a high-pressure concentrate with a certain pressure. To avoid wasting the pressure of the first concentrate, it enters the pressure regulating device 3 through the third pipeline 93. The outlet of the second water tank of the raw water tank 1 is connected to the pressure regulating device 3 through the second pipeline group 92. The desulfurization wastewater in the raw water tank 1 can be discharged through the outlet of the second water tank and enter the pressure regulating device 3 through the second pipeline group 92. Thus, the wastewater enters the pressure regulating device 3 through the pressure regulating device. The first concentrate in device 3 regulates the pressure of the desulfurization wastewater entering the pressure regulating device 3. By regulating the first concentrate, the pressure of the desulfurization wastewater entering the pressure regulating device 3 is increased. The desulfurization wastewater with increased pressure becomes the first desulfurization wastewater, meaning the pressure of the first desulfurization wastewater is higher than that of the desulfurization wastewater. The first concentrate is depressurized to become the second concentrate, with the pressure of the first concentrate being higher than that of the second concentrate. The first concentrate achieves the transformation of the desulfurization wastewater from low pressure to high pressure, and also achieves the transformation from the first concentrate to the second concentrate. This allows the pressure of the first concentrate to be transferred to the low-pressure desulfurization wastewater. The first desulfurization wastewater flows through the pressure regulating pipeline group 95 and the first pipeline 91 and then enters the reverse osmosis device 2. The pressure of the desulfurization wastewater is increased by the first concentrate, so that the desulfurization wastewater with increased pressure meets the inlet pressure requirements of the reverse osmosis device 2. The second concentrate flows through the rotary control valve 4 and is then discharged. When the rotary control valve 4 switches water channels, to prevent vibration or water flow knocking caused by a vacuum in the drain pipe when the second concentrated water is discharged, a vacuum breaking component 5 connected to the respective drain pipe is installed at the outlet of the rotary control valve 4. When the rotary control valve 4 switches, causing the water flow in one side of the drain pipe to be interrupted, the second concentrated water in that side of the pipe continues to flow forward due to inertia, resulting in a vacuum at the interruption point in the drain pipe. The vacuum breaking component 5 draws air into the vacuum position in the drain pipe, breaking the vacuum and preventing vibration or water flow knocking in the rotary control valve 4 or the drain pipe.

[0056] The energy conversion control system provided by the present invention utilizes the pressure of the first concentrated water through the pressure regulating device 3 to pressurize the desulfurization wastewater fed into the reverse osmosis unit 2, thereby improving the energy utilization rate and solving the problem of energy waste caused by the high pressure of the first concentrated water generated during the treatment of desulfurization wastewater in the prior art, which is discharged after being adjusted by valves or reduced in pressure by flow limiting orifice plates.

[0057] In one embodiment, such as Figure 1 As shown, the pressure regulating device 3 includes: a first water pressure cylinder 31 and a second water pressure cylinder 32;

[0058] The first water pressure cylinder 31 has a first pressure regulating port 33, a second pressure regulating port 34 and a third pressure regulating port 35. The first pressure regulating port 33 is connected to the first pipe 91 through a pressure regulating pipe group 95. The second pressure regulating port 34 is connected to the outlet of the second water tank through a second pipe group 92. The third pressure regulating port 35 is connected to the third outlet through a third pipe 93.

[0059] The second water pressure cylinder 32 has a fourth pressure regulating port 36, a fifth pressure regulating port 37 and a sixth pressure regulating port 38. The fourth pressure regulating port 36 is connected to the first pipe 91 through a pressure regulating pipe group 95. The fifth pressure regulating port 37 is connected to the outlet of the second water tank through a second pipe group 92. The sixth pressure regulating port 38 is connected to the third outlet through a third pipe 93.

[0060] Both the first water pressure cylinder 31 and the second water pressure cylinder 32 are used to adjust the pressure of the desulfurization wastewater discharged from the outlet of the second water tank of the raw water tank 1 using the first concentrated water to become the first desulfurization wastewater. The first desulfurization wastewater is sent into the reverse osmosis device 2 through the pressure regulating pipeline group 95 and the first pipeline 91.

[0061] The first hydraulic cylinder 31 includes a first cylinder body 311 and a first piston 312. The first piston 312 is slidably disposed in the inner cavity of the first cylinder body 311 and divides the inner cavity of the first cylinder body 311 into a first left sub-cavity 313 and a first right sub-cavity 314. A first pressure regulating port 33 and a second pressure regulating port 34 are disposed on the cavity wall of the first left sub-cavity 313, and a third pressure regulating port 35 is disposed on the cavity wall of the first right sub-cavity 314. A one-way valve is provided at both the first pressure regulating port 33 and the second pressure regulating port 34 to prevent backflow. The second hydraulic cylinder 32 includes a second cylinder body 321 and a second piston 322. The second piston 322 is slidably disposed within the inner cavity of the second cylinder body 321 and divides the inner cavity of the second cylinder body 321 into a second left sub-cavity 323 and a second right sub-cavity 324. A fourth pressure regulating port 36 and a fifth pressure regulating port 37 are disposed on the cavity wall of the second left sub-cavity 323, and a sixth pressure regulating port 38 is disposed on the cavity wall of the second right sub-cavity 324. One-way valves are provided at both the fourth pressure regulating port 36 and the fifth pressure regulating port 37 to prevent backflow. Figure 1As shown, the second pipeline group 92 has a second main pipe 921 and two second branch pipes 922. One end of the second main pipe 921 is connected to the outlet of the second water tank of the original water tank 1, and the other end is connected to the two second branch pipes 922 respectively. One of the second branch pipes 922 is connected to the second pressure regulating port 34 of the first water pressure cylinder 31, and the other second branch pipe 922 is connected to the fifth pressure regulating port 37 of the second water pressure cylinder 32. The pressure regulating pipeline group 95 has a pressure regulating main pipe 951 and two pressure regulating branch pipes 952. One end of the pressure regulating main pipe 951 is connected to the first pipeline 91, and the other end is connected to the two pressure regulating branch pipes 952. One pressure regulating branch pipe 952 is connected to the first pressure regulating port 33, and the other pressure regulating branch pipe 952 is connected to the fourth pressure regulating port 36. A second low-pressure water pump 63 is installed on the second main pipe 921 of the second pipeline group 92. The desulfurization wastewater discharged from the outlet of the second water tank of the raw water tank 1 is pumped by the second low-pressure water pump 63 into the first left sub-cavity 313 or the second left sub-cavity 323. The desulfurization wastewater pumped by the second low-pressure water pump 63 has a low pressure and is called low-pressure desulfurization wastewater. The desulfurization wastewater pumped by the second low-pressure water pump 63 enters the first left sub-cavity 313 through the second main pipe 921, the corresponding second branch pipe 922, and the second pressure regulating water port 34, or the desulfurization wastewater enters the second left sub-cavity 323 through the second main pipe 921, the corresponding second branch pipe 922, and the fifth pressure regulating water port 37. The one-way valves installed at the second pressure regulating water port 34 and the fifth pressure regulating water port 37 can prevent the desulfurization wastewater entering the first left sub-cavity 313 or the second left sub-cavity 323 from flowing back.

[0062] If the desulfurization wastewater enters the first left sub-cavity 313, it can push the first piston 312 to slide towards the first right sub-cavity 314. The second concentrated water that has completed pressure energy exchange in the first right sub-cavity 314 before being squeezed by the first piston 312 is discharged through the first drain hole 411 of the rotary control valve 4. After pressure energy exchange, the first concentrated water is depressurized and becomes the second concentrated water with lower pressure. When the second concentrated water in the first right sub-cavity 314 of the first hydraulic cylinder 31 is discharged, the first concentrated water generated by the reverse osmosis device 2 enters the rotary control valve 4 through the middle inlet hole 414 and flows out from the second inlet hole 412 of the rotary control valve 4 into the second right sub-cavity 324 of the second hydraulic cylinder 32. The first concentrated water pushes the second piston 322 towards the second left sub-cavity 323. As the flow shifts to one side, the first concentrated water transfers pressure energy to the previously entering desulfurization wastewater in the second left sub-cavity 323, increasing the pressure of the desulfurization wastewater. The desulfurization wastewater with increased pressure becomes high-pressure first desulfurization wastewater. The first desulfurization wastewater enters the reverse osmosis unit 2 through the fourth pressure regulating port 36, the corresponding pressure regulating branch pipe 952, the pressure regulating main pipe 951, and the first pipeline 91. At the same time, the first desulfurization wastewater flowing through the pressure regulating main pipe 951 is pressurized again by the booster pump 64 installed on the pressure regulating main pipe 951. By controlling the water flow pressure at the outlet of the booster pump 64 to be equivalent to that of the high-pressure pump 62, the pressure of the desulfurization wastewater discharged from the outlet of the first water tank and the outlet of the second water tank can be controlled to be equivalent when it finally enters the reverse osmosis unit 2, ensuring that the pressure of the desulfurization wastewater entering the reverse osmosis unit 2 is stable.

[0063] If the desulfurization wastewater enters the second left sub-cavity 323, it can push the second piston 322 to slide towards the second right sub-cavity 324. The second concentrated water that has completed pressure energy exchange in the second right sub-cavity 324 before being squeezed by the second piston 322 is discharged through the second drain hole 413 of the rotary control valve 4. When the second concentrated water in the second right sub-cavity 324 of the second hydraulic cylinder 32 is discharged, the first concentrated water generated by the reverse osmosis device 2 enters the rotary control valve 4 through the middle inlet hole 414 and is discharged from the first inlet hole 410 of the rotary control valve 4 into the first right sub-cavity 314 of the first hydraulic cylinder 31. The first concentrated water pushes the first piston 312 toward the first left sub-cavity 313. The first concentrated water transmits pressure energy to the desulfurization wastewater that previously entered the first left sub-cavity 313, thereby increasing the pressure of the desulfurization wastewater. The increased pressure of the desulfurization wastewater causes the first desulfurization wastewater to enter the reverse osmosis device 2 through the first pressure regulating port 33, the corresponding pressure regulating branch pipe 952, the pressure regulating main pipe 951, and the first pipeline 91. The first desulfurization wastewater flowing through the pressure regulating main pipe is further pressurized by the booster pump 64 installed on the pressure regulating main pipe 951, and the pressure of the booster pump 64 is controlled to be equivalent to the water flow pressure at the outlet of the high-pressure pump 62.

[0064] In one embodiment, such as Figures 2-14As shown, the rotary control valve 4 includes: a valve body 41 having a valve cavity, on which a first water inlet hole 410, a first water outlet hole 411, a second water inlet hole 412, a second water outlet hole 413 and an intermediate water inlet hole 414 are provided.

[0065] The valve core 42 is rotatably disposed within the valve cavity and is provided with a first water channel 421, a third water channel 423, a pair of second water channels 422, and a pair of fourth water channels 424. Adjusting the rotation angle of the valve core 42 within the valve cavity allows control over the connection or disconnection of the first water inlet 410 and the first water outlet 411 via the first water channel 421; the connection or disconnection of the first water inlet 410 and the intermediate water inlet 414 via the corresponding second water channel 422; the connection or disconnection of the second water inlet 412 and the second water outlet 413 via the third water channel 423; and the connection or disconnection of the second water inlet 412 and the intermediate water outlet 414 via the corresponding second water channel 422. The intermediate water inlet 414 is connected or disconnected through the corresponding fourth water channel 424; wherein, the overflow outlets at both ends of the first water channel 421, the overflow outlets at both ends of the third water channel 423, the overflow outlet at the end of the second water channel 422 facing the first water inlet 410, and the overflow outlet at the end of the fourth water channel 424 facing the second water inlet 412 are all provided with buffer grooves 47, so that the vibration caused by the change in flow rate when the liquid flows through the overflow outlets of the first water channel 421, the second water channel 422, the third water channel 423 and the fourth water channel 424 can be alleviated by the corresponding buffer grooves 47;

[0066] A control valve actuator 48 is used to drive the valve core 42 to rotate within the valve chamber.

[0067] The valve body 41 has a pair of partitions 415 inside its valve cavity, which divide the valve cavity into a first valve cavity 43, a second valve cavity 44, and an intermediate valve cavity 45 located between the first valve cavity 43 and the second valve cavity 44. Each partition 415 has a through hole 416, through which the first valve cavity 43 and the second valve cavity 44 communicate with the intermediate valve cavity 45. The first water inlet hole 410 and the first water outlet hole 411 are located on the cavity wall of the first valve cavity 43, the second water inlet hole 412 and the second water outlet hole 413 are located on the cavity wall of the second valve cavity 44, and the intermediate water inlet hole 414 is located on the cavity wall of the intermediate valve cavity 45.

[0068] The valve core 42 is rotatably disposed within the valve cavity of the valve body 41. A first water inlet hole 410, a first water outlet hole 411, a second water inlet hole 412, a second water outlet hole 413, and an intermediate water inlet hole 414 are provided on the cavity wall of the valve body 41. A first water channel 421, a pair of second water channels 422, a third water channel 423, and a pair of fourth water channels 424 are provided on the valve core 42. The valve core 42 is driven to rotate within the valve cavity of the valve body 41 by the control valve actuator 48. The first water channel 421, a pair of second water channels 422, a third water channel 423, and a pair of fourth water channels 424 on the valve cavity of the valve body 41 are... The first water inlet 410 and the first water outlet 411 can be connected or disconnected through the first water channel 421. The first water inlet 410 and the intermediate water inlet 414 can be connected or disconnected through the second water channel 422. The second water inlet 412 and the second water outlet 413 can be connected or disconnected through the third water channel 423. The second water inlet 412 and the intermediate water inlet 414 can be connected or disconnected through the fourth water channel 424. The control valve driver 48 is a rotary motor, and rotating the valve core 42 can form multiple different water paths. The third pressure regulating port 35 of the first water pressure cylinder 31 is connected to the first water inlet 410 of the rotary control valve 4 through a pipe. The sixth pressure regulating port 38 of the second water pressure cylinder 32 is connected to the second water inlet 412 of the rotary control valve 4 through a pipe. The third outlet of the reverse osmosis device 2 is connected to the intermediate water inlet 414 of the rotary control valve 4 through the third pipe 93.

[0069] One end of the third pipe 93 is connected to the third outlet, and the other end is connected to the middle inlet hole 414 of the valve body 41 of the rotary control valve 4. The first drain hole 411 and the second drain hole 413 serve as the outlets of the rotary control valve 4. The second concentrated water is discharged from the outlet of the rotary control valve 4. Drainage pipes are connected to the first drain hole 411 and the second drain hole 413 respectively. The vacuum breaking component 5 is installed on the drainage pipes. The drainage pipe connected to the first drain hole 411 is the first drainage pipe 6, and the drainage pipe connected to the second drain hole 413 is the second drainage pipe 7. The vacuum breaking component 5 includes two vacuum breaking valves 51. One vacuum breaking valve 51 is installed on the first drainage pipe 6 and the second drainage pipe 7 respectively. Air is drawn into the corresponding first drainage pipe 6 and the second drainage pipe 7 through the vacuum breaking valve 51 to break the vacuum generated.

[0070] The first concentrated water discharged from the third outlet of the reverse osmosis unit 2 enters the intermediate valve chamber 45 through the third pipe 93 and the intermediate inlet hole 414. By controlling the valve core 42 to rotate at a given angle, the intermediate inlet hole 414 can be connected to the first water inlet hole 410 or the second water inlet hole 412. The control valve actuator 48 drives the valve core 42 to rotate. If the intermediate inlet hole 414 is connected to the second water inlet hole 412, the first concentrated water entering the intermediate valve chamber 45 enters the second water pressure cylinder 32 through the corresponding through hole 416, a fourth water channel 424, the second water inlet hole 412, and the sixth pressure regulating port 38. Inside the second right sub-cavity 324, the first concentrated water entering the second right sub-cavity 324 pushes the second piston 322 towards the second left sub-cavity 323 to squeeze the desulfurization wastewater in the second left sub-cavity 323. This wastewater then enters the reverse osmosis device 2 through the fourth pressure regulating port 36, the corresponding pressure regulating branch pipe 952, the pressure regulating main pipe 951, and the first pipe 91. After the first concentrated water pushes the second piston 322 to a designated position on the left side of the second hydraulic cylinder 32, pressure energy exchange is completed. Simultaneously, while the middle inlet hole 414 connects to the second upper water hole 412, the first upper water hole 410 connects to the first lower water hole 412. 11 is connected through the first waterway 421. At this time, the desulfurization wastewater in the raw water tank 1 is pumped into the first left sub-chamber 313 by the second low-pressure water pump 63. The desulfurization wastewater pushes the first piston 312 to slide so that the second concentrated water in the first right sub-chamber 314 is discharged from the third pressure regulating port 35, the first water inlet 410, the first waterway 421, the first water outlet 411, and the first drainage pipe 6. The control valve core 42 rotates again at a given angle. When the first concentrated water enters the first right sub-chamber 314 of the first water pressure cylinder 31, the pressure of the desulfurization wastewater that previously entered the first left sub-chamber 313 is increased. At that time, the second concentrated water that has completed the pressure energy transmission in the second right sub-cavity 324 of the second water pressure cylinder 32 is discharged from the sixth pressure regulating port 38, the second water inlet 412, the third water channel 423, the second water outlet 413 and the second drainage pipe 7. Thus, it can be seen that when the first concentrated water enters the second right sub-cavity 324 of the second water pressure cylinder 32, the second concentrated water formed in the first right sub-cavity 314 of the first water pressure cylinder 31 is discharged.

[0071] When valve core 42 rotates to switch between different water circuits, in order to avoid water hammer phenomenon during the switching process, such as... Figure 11As shown, buffer grooves 47 are provided at the flow outlets at both ends of the first waterway 421, the flow outlets at both ends of the third waterway 423, the flow outlet at the end of the second waterway 422 facing the first water inlet 410, and the flow outlet at the end of the fourth waterway 424 facing the second water inlet 412. For example, when the valve core 42 rotates, the flow outlets at both ends of the first waterway 421 gradually shift away from the first water inlet 410 and the first water outlet 411. Under the action of the buffer grooves 47 at the flow outlets at both ends of the first waterway 421, the flow rate of the first concentrated water or the second concentrated water entering and exiting the first waterway 421 through the first water inlet 410 and the first water outlet 411 gradually decreases. To prevent water hammer caused by the instantaneous entry and exit of the first or second concentrated water into or out of the first hydraulic cylinder 31 or the second hydraulic cylinder 32, the buffer grooves 47 at the flow outlets at both ends of the third waterway 423, the flow outlet at the end of the second waterway 422 facing the first water inlet 410, and the flow outlet at the end of the fourth waterway 424 facing the second water inlet 412 serve the same purpose as the buffer grooves 47 at both ends of the first waterway 421. The buffer grooves 47 mitigate the vibration of the rotary control valve 4 caused by changes in water flow rate when the first or second concentrated water enters or exits the first hydraulic cylinder 31 or the second hydraulic cylinder 32.

[0072] The valve core 42 includes a connecting shaft 425 and a cylindrical first valve core portion 426 and a second valve core portion 427. The first valve core portion 426 is rotatably disposed within the first valve cavity 43, and the second valve core portion 427 is rotatably disposed within the second valve cavity 44. The connecting shaft 425 is located in the intermediate valve cavity 45 and fixed to the first valve core portion 426 and the second valve core portion 427. A first water channel 421 and a pair of second water channels 422 are disposed on the first valve core portion 426, and a third water channel 423 and a pair of fourth water channels 424 are disposed on the second valve core portion 426. 7. Adjust the rotation of the valve core 42. The first water inlet 410 and the intermediate water inlet 414 are connected or disconnected through the corresponding second water channel 422, the corresponding through hole 416 and the intermediate valve chamber 45. The first water inlet 410 and the first water outlet 411 are connected or disconnected through the first water channel 421. The second water inlet 412 and the intermediate water inlet 414 are connected or disconnected through the corresponding fourth water channel 424, the corresponding through hole 416 and the intermediate valve chamber 45. The second water inlet 412 and the second water outlet 413 are connected or disconnected through the third water channel 423.

[0073] The first waterway 421 and the third waterway 423 are arranged perpendicularly to each other.

[0074] A pair of second water channels 422 are symmetrically arranged with respect to the rotation centerline of the first valve core 426, and a pair of fourth water channels 424 are symmetrically arranged with respect to the rotation centerline of the second valve core 427.

[0075] The first water channel 421 is arranged radially along the first valve core 426. When the first water inlet 410 and the first water outlet 411 are connected, the water outlets at both ends of the first water channel 421 are connected to the first water inlet 410 and the first water outlet 411, respectively.

[0076] Each second waterway 422 includes: a second radial waterway section 4221 and a second axial waterway section 4222 communicating with the second radial waterway section 4221; the second radial waterway section 4221 is arranged radially along the first valve core 426, the second axial waterway section 4222 is arranged axially along the first valve core 426, the water outlet of the second waterway 422 at one end of the second radial waterway section 4221 is the second radial water outlet, and the water outlet of the second waterway 422 at one end of the second axial waterway section 4222 is the second axial water outlet; when the first water inlet 410 is connected to the intermediate water inlet 414, the second radial water outlet of the second waterway 422 is connected to the first water inlet 410, and the second axial water outlet of the second waterway 422 is connected to the corresponding through hole 416.

[0077] The third waterway 423 is arranged radially along the second valve core 427. When the second water inlet 412 and the second water outlet 413 are connected, the water outlets at both ends of the third waterway 423 are connected to the second water inlet 412 and the second water outlet 413, respectively.

[0078] Each fourth waterway 424 includes: a fourth radial waterway section 4241 and a fourth axial waterway section 4242 communicating with the fourth radial waterway section 4241; the fourth radial waterway section 4241 is arranged radially along the second valve core 427, the fourth axial waterway section 4242 is arranged axially along the second valve core 427, the flow port of the fourth waterway 424 at one end of the fourth radial waterway section 4241 is the fourth radial water port, and the flow port of the fourth waterway 424 at one end of the fourth axial waterway section 4242 is the fourth axial water port; when the second water inlet 412 is connected to the intermediate water inlet 414, the fourth radial water port of the fourth waterway 424 is connected to the second water inlet 412, and the fourth axial water port of the fourth waterway 424 is connected to the corresponding through hole 416.

[0079] The buffer groove 47 is opened along the circumference of the first valve core 426 at the flow outlets at both ends of the first waterway 421 and at the second radial outlets of each second waterway 422, and along the circumference of the second valve core 427 at the flow outlets at both ends of the third waterway 423 and at the fourth radial outlets of each fourth waterway 424.

[0080] The rotary control valve also includes a pair of slewing support bearings 46 disposed within the valve cavity for supporting the valve core 42.

[0081] like Figure 14 As shown, the valve body 41 has a main body and two end caps. The main body is a hollow cylindrical structure with openings at both ends. An end cap is installed at each end of the main body. The main body and the two end caps together form a valve cavity. Two partitions 415 are provided in the main body to divide the valve cavity into a first valve cavity 43, an intermediate valve cavity 45, and a second valve cavity 44. To allow the valve core 42 to rotate within the valve cavity, as shown... Figure 2 As shown, a support bearing 46 is provided in the valve cavity to support the valve core 42, so as to facilitate the rotation of the valve core 42. A rotary motor is provided to drive the valve core 42 to rotate.

[0082] A pair of partitions 415 are provided inside the valve cavity of the valve body 41 to divide the valve cavity of the valve body 41 into a first valve cavity 43, a second valve cavity 44, and an intermediate valve cavity 45, as follows: Figure 2 , Figure 14 As shown, a through hole 416 is provided on each partition 415. The first valve chamber 43 and the second valve chamber 44 are connected to the intermediate valve chamber 45 through the corresponding through holes 416. The intermediate water inlet hole 414 is provided on the cavity wall of the intermediate valve chamber 45. The first valve core part 426 of the valve core 42 is provided in the first valve chamber 43, and the second valve core part 427 of the valve core 42 is provided in the second valve chamber 44. The connecting shaft 425 is located in the intermediate valve chamber 45. The two ends of the connecting shaft 425 are connected to the first valve core part 426 and the second valve core part 427 respectively. The first valve core part 426, the second valve core part 427 and the connecting shaft 425 are coaxially arranged.

[0083] A first water channel 421 and a pair of second water channels 422 are both disposed on the first valve core 426. The first water channel 421 is disposed radially along the first valve core 426, and the pair of second water channels 422 are disposed symmetrically along the rotation centerline of the first valve core 426. The second radial water channel segment 4221 of each second water channel 422 is disposed radially along the first valve core 426, and the second axial water channel segment 4222 is disposed axially along the first valve core 426. The second water channel 422 is located on the second radial water channel segment 4221. The flow outlet at one end of 21 is the second radial flow outlet. The flow outlet at one end of the second axial waterway 422 is the second axial flow outlet. The buffer groove 47 is arranged circumferentially along the first valve core 426 at the flow outlets and the second radial flow outlets at both ends of the first waterway 421. The extension direction of the buffer groove 47 is consistent with the tangential direction at the flow outlets and the second radial flow outlets at both ends of the first waterway 421. The buffer groove 47 is an arc-shaped groove. The valve core 42 rotates by a first angle. The flow ports at both ends of the first water channel 421 can be aligned with the first water inlet 410 or the first water outlet 411 respectively. At this time, the first water channel 421 is connected to the first water inlet 410 and the first water outlet 411. When the valve core 42 rotates to the second angle, the second radial water outlet of the second water channel 422 is aligned with the first water inlet 410. The second axial water outlet of the second water channel 422 coincides with the through hole 416 on the corresponding partition plate 415. At this time, the first water inlet 410 and the intermediate water inlet 414 are connected through the second water channel 422, the corresponding through hole 416 and the intermediate valve chamber 45. The buffer groove 47 set in the second radial water outlet can gradually reduce the flow rate of the liquid entering and exiting through the second radial water outlet and the first water inlet 410 when the valve core 42 rotates to disconnect the connection between the first water inlet 410 and the intermediate water inlet 414. This avoids pressure fluctuations caused by sudden changes in liquid flow rate and prevents vibration of the rotary control valve 4 caused by possible water hammer.

[0084] A third water channel 423 and a pair of fourth water channels 424 are disposed on the second valve core 427. The third water channel 423 is arranged radially along the second valve core 427, and the pair of fourth water channels 424 are symmetrically arranged along the rotation centerline of the second valve core 427. The fourth radial water channel segment 4241 of each fourth water channel 424 is arranged radially along the second valve core 427, and the fourth axial water channel segment 4242 is arranged axially along the second valve core 427. The flow outlet at one end of the fourth radial water channel segment 4241 of the fourth water channel 424 is the fourth radial water outlet. The flow port at one end of the fourth axial waterway section 4242 is the fourth axial water port; the buffer groove 47 is arranged circumferentially along the second valve core 427 at the flow ports at both ends of the third waterway 423 and at the fourth radial water port, and the extension direction of the buffer groove 47 is consistent with the tangential direction of the flow ports at both ends of the third waterway 423 and the fourth radial water port; when the valve core 42 rotates at a second angle, the second radial water port of one of the second waterways 422 is aligned with the first water inlet 410, and the second axial water port of the second waterway 422 coincides with the through hole 416 on the corresponding partition 415. The upper water inlet 410 and the middle water inlet 414 are connected by a second water channel 422, a corresponding through hole 416, and an intermediate valve chamber 45. Simultaneously, the two end outlets of the third water channel 423 coincide with the second upper water inlet 412 and the second lower water inlet 413, respectively. When the valve core 42 rotates by a first angle, the outlets at both ends of the first water channel 421 can coincide with the first upper water inlet 410 and the first lower water inlet 411, respectively. At the same time, the fourth radial outlet of a fourth water channel 424 coincides with the second upper water inlet 412, and the fourth axial outlet of the fourth water channel 424 coincides with the corresponding... When the through holes 416 on plate 415 overlap, the second water inlet hole 412 and the middle water inlet hole 414 are connected through a fourth water channel 424, the corresponding through hole 416, and the middle valve chamber 45. Buffer grooves 47 are provided at the fourth radial water inlet. When the valve core 42 rotates to disconnect the connection between the second water inlet hole 412 and the middle water inlet hole 414, the flow velocity of the water entering and exiting through the second water inlet hole 412 and the fourth radial water inlet gradually decreases, avoiding pressure fluctuations caused by sudden changes in water flow rate and preventing valve vibration caused by possible water hammer.

[0085] The first water channel 421 and the third water channel 423 are arranged perpendicularly and alternately. When the valve core 42 rotates at a first angle, the first water channel 421 is connected to the first water inlet 410 and the first water outlet 411. At this time, the second water inlet 412 is connected to the middle water inlet 414 through the fourth water channel 424, the corresponding through hole 416 and the middle valve chamber 45. When the valve core 42 rotates at a second angle, the first water inlet 410 and the middle water inlet 414 are connected through the second water channel 422, the corresponding through hole 416 and the middle valve chamber 45. At this time, the second water inlet 412 and the second water outlet 413 are connected to the third water channel 423. This drives the valve core 42 to rotate, which can switch between different water channels.

[0086] The following is combined Figures 2-7 The switching action of the rotary control valve in the energy conversion control system provided by this invention will be described in detail below:

[0087] S1: As Figure 2 and Figure 3 As shown, in the "low-pressure filling, high-pressure exchange" stage, the starting position of the valve core 42 is "0 degrees". In this state, the second low-pressure water pump 63 sends the desulfurization wastewater in the raw water tank 1 into the second left sub-cavity 323 of the second hydraulic cylinder 32. The desulfurization wastewater entering the second left sub-cavity 323 pushes the second piston 322 to move towards the rotary control valve 4, so that the second concentrated water in the second right sub-cavity 324 is discharged through the rotary control valve 4. The second concentrated water is formed after the first concentrated water is depressurized. This is the low-pressure filling stage. At the same time, the first concentrated water generated by the reverse osmosis device 2 enters the first right sub-cavity 314 of the first hydraulic cylinder 31 through the rotary control valve 4. The first concentrated water pushes the first piston 312 to move towards the first left sub-cavity 313, so that the desulfurization wastewater that previously entered the first left sub-cavity 313 gains energy and becomes the first desulfurization wastewater. This is the high-pressure exchange stage. The first desulfurization wastewater is pressurized again by the booster pump 64 and then enters the reverse osmosis device 2. At this stage, the one-way valve at the fifth pressure regulating port 37 of the second water pressure cylinder 32 is in the open state, while the one-way valve at the fourth pressure regulating port 36 of the second water pressure cylinder 32 is in the closed state. At the same time, the one-way valve at the first pressure regulating port 33 of the first water pressure cylinder 31 is in the open state, while the one-way valve at the second pressure regulating port 34 of the first water pressure cylinder 31 is in the closed state.

[0088] S2: The rotary motor drives the valve core 42 to rotate counterclockwise. The overflow ports at both ends of the third water channel 423 on the second valve core part 427 of the valve core 42 are misaligned with the second water inlet 412 and the second water outlet 413. The second radial water outlet of the second water channel 422 on the first valve core part 426 of the valve core 42 is misaligned with the first water inlet 410 on the valve body 41. As the misalignment angle increases, the resistance of the second concentrated water discharged through the rotary control valve 4 in the second right sub-chamber 324 of the second hydraulic cylinder 32 gradually increases, causing the amount of desulfurization wastewater entering the second left sub-chamber 323 of the second hydraulic cylinder 32 to gradually decrease. At the same time, the resistance of the first concentrated water entering the first right sub-chamber 314 of the first hydraulic cylinder 31 through the rotary control valve 4 gradually increases, causing the amount of the first concentrated water entering the first right sub-chamber 314 to gradually decrease.

[0089] S3: During the "slow-closing" stage, the valve core 42 continues to rotate counterclockwise under the drive of the rotary motor. At this time, due to the presence of buffer grooves at the overflow ports at both ends of the third waterway 423 and at the second radial ports of the second waterway 422, the second concentrated water in the second right sub-cavity 324 can still be discharged from the rotary control valve 4 at a relatively small flow rate through the corresponding buffer groove 47. The design of the buffer groove 47 effectively avoids the water hammer problem that occurs when the second concentrated water is instantaneously cut off. At the same time, the first concentrated water can also still enter the first right sub-cavity 314 of the first hydraulic cylinder 31 at a relatively small flow rate through the corresponding buffer groove 47 and the rotary control valve 4. The design of the buffer groove 47 effectively avoids the water hammer problem that occurs when the first concentrated water is instantaneously cut off. The slow-closing function of the corresponding check valve is achieved by designing the buffer groove 47.

[0090] S4: As Figure 4 and Figure 5 As shown, the "low-pressure pre-pressurization, high-pressure pre-depressurization" stage is the "slow opening" stage. Under the drive of the rotary motor, the valve core 42 continues to rotate counterclockwise. At this time, the buffer grooves set at the flow outlets at both ends of the third water channel 423 and the second radial water outlet of the second water channel 422 are closed. The flow area of ​​the buffer grooves at the flow outlets at both ends of the first water channel 421 and the fourth radial water outlet of a fourth water channel 424 gradually increases. The first concentrated water produced by the reverse osmosis device 2 gradually enters the second right sub-cavity 324 of the second hydraulic cylinder 32 through the rotary control valve 4. This is the "low-pressure pressurization", and the second hydraulic cylinder 32 is transformed into a high-pressure cylinder. At this time, the flow of the first concentrated water entering the second right sub-cavity 324 is small, which only increases the water pressure in the second water pressure cylinder 32 without a large flow of the first concentrated water entering the second right sub-cavity 324; at the same time, the first concentrated water in the first right sub-cavity 314 of the first water pressure cylinder 31 is depressurized and gradually discharged, which is "high pressure pre-depressurization". After the first concentrated water that entered the first right sub-cavity 314 is depressurized, it becomes the second concentrated water and is discharged. The first water pressure cylinder 31 is transformed into a low pressure cylinder. At this time, the flow of the second concentrated water discharged from the first water pressure cylinder 31 is small, which only increases the pressure in the first water pressure cylinder 31 without a large flow of the second concentrated water being discharged. At this time, the one-way valve set at the fourth pressure regulating port 36 of the second water pressure cylinder 32 gradually opens, and the one-way valve set at the fifth pressure regulating port 37 of the second water pressure cylinder 32 gradually closes, avoiding the impact of the rapid inflow and outflow of water on the valve plate of the one-way valve; the one-way valve set at the second pressure regulating port 34 of the first water pressure cylinder 31 gradually opens, and the one-way valve set at the first pressure regulating port 33 of the first water pressure cylinder 31 gradually closes. The buffer grooves set at the overflow ports at both ends of the first waterway 421 and at the second radial port of the fourth waterway 424 avoid the generation of water hammer when the high-pressure water flow enters the second water pressure cylinder 32 instantaneously, and also avoid the one-way valve being knocked when it is opened and closed instantaneously under the impact of a large flow of water.

[0091] S5: As Figure 6 and Figure 7 As shown, during the "low-pressure filling, high-pressure exchange" stage, the valve core 42 rotates to the "90-degree position." Driven by the rotary motor, the valve core 42 continues to rotate 90 degrees counterclockwise from S1 until the flow ports at both ends of the first water channel 421 on the first valve core 426 are completely aligned with the first water inlet 410 and the first water outlet 411, and the fourth radial water outlet of the fourth water channel 424 is aligned with the second water inlet 412. During this process, the amount of desulfurization wastewater pumped by the second low-pressure water pump 63 into the first left sub-chamber 313 of the first hydraulic cylinder 31 gradually increases. The amount of first concentrated water entering the second right sub-chamber 324 of the second hydraulic cylinder 32 through the rotary control valve 4 also increases. The first concentrated water in the second right sub-chamber 324 of the second hydraulic cylinder 32 exchanges energy with the desulfurization wastewater in the second left sub-chamber 323, realizing the transmission of water pressure energy. The desulfurization wastewater entering the first left sub-chamber 313 of the first hydraulic cylinder 31 pushes the first piston 312 to move towards the first right sub-chamber 314. The concentrated water entering the second right sub-chamber 324 of the second hydraulic cylinder 32 pushes the second piston 322 to move towards the second left sub-chamber 323. Once both pistons 312 and 322 have moved to their designated positions, the valve core 42 rotates counterclockwise by 90 degrees in preparation for the next step. During this stage, the check valve at the second pressure regulating port 34 of the first hydraulic cylinder 31 is open, and the check valve at the first pressure regulating port 33 of the first hydraulic cylinder 31 is closed. The check valve at the fourth pressure regulating port 36 of the second hydraulic cylinder 32 is open, and the check valve at the fifth pressure regulating port 37 of the second hydraulic cylinder 32 is closed.

[0092] The above S1-S5 refers to the action of the valve core 42 of the rotary control valve 4 rotating 90 degrees. When the valve core 42 rotates 90 degrees again, the rotary motor drives the valve core 42 to rotate. During the 90-degree rotation, the valve core 42 successively presents the "slow closing" stage, the "slow opening" stage, and the "low pressure filling and high pressure exchange" stage.

[0093] Regarding the positional states of the valve core 42 and valve body 41 of the rotary control valve 4 at positions of 0 degrees, 90 degrees, 180 degrees, 270 degrees, and 360 degrees during counterclockwise rotation:

[0094] P1: The starting position of the rotation of valve core 42 is recorded as "0-degree position". This state is as follows: Figure 3As shown, the second radial water inlet of the second water channel 422 of the first valve core 426 is connected to the first water inlet 410, and the second axial water inlet is connected to the through hole 416 on the corresponding partition 415. The flow outlets at both ends of the first water channel 421 are blocked by the valve body 41. The first concentrated water generated by the reverse osmosis device 2 enters the first right sub-cavity 314 of the first hydraulic cylinder 31 through the intermediate inlet 414, the intermediate valve cavity 45, the corresponding through hole 416, the second axial water inlet, the second water channel 422, the second radial water inlet, and the first water inlet 410. The fourth radial water inlet and the fourth axial water inlet of the two fourth water channels 424 on the second valve core 427 are blocked, while the flow outlets at both ends of the third water channel 423 are aligned with the second water inlet 412 and the second water outlet 413 respectively. The second concentrated water in the second right sub-cavity 324 of the second hydraulic cylinder 32 is discharged from the second water outlet 413 after passing through the third water channel 423 of the rotary control valve 4.

[0095] P2: Valve core 42 rotates 90 degrees from its initial position P1, denoted as the "90-degree position". This state is as follows: Figure 7 As shown, the second radial and second axial water inlets of the two second water channels 422 of the first valve core 426 are blocked. The flow outlets at both ends of the first water channel 421 are aligned with the first water inlet 410 and the first water outlet 411. The second concentrated water in the first right sub-cavity 314 of the first hydraulic cylinder 31 is discharged from the first water outlet 411 after passing through the first water channel 421 of the rotary control valve 4. The flow outlets at both ends of the third water channel 423 of the second valve core 427 are blocked. The fourth radial water inlet of the fourth water channel 424 of the second valve core 427 is aligned with the second water inlet 412, and the fourth axial water inlet is aligned with the corresponding through hole 416. The first concentrated water generated by the reverse osmosis device 2 enters the second right sub-cavity 324 of the second hydraulic cylinder 32 through the intermediate inlet 414, the intermediate valve cavity 45, the corresponding through hole 416, the fourth axial water inlet, the fourth water channel 424, the fourth radial water inlet, and the second water inlet 412.

[0096] P3: Valve core 42 rotates another 90 degrees from the P2 position, recorded as the "180-degree position". This state is as follows: Figure 8As shown, the water flow at both ends of the first water channel 421 of the first valve core 426 is blocked. The second radial water port of the second water channel 422 on the first valve core 426 is connected to the first water inlet 410. The second axial water port is connected to the through hole 416 on the corresponding partition 415. The first concentrated water generated by the reverse osmosis device 2 enters the first right sub-cavity 314 of the first hydraulic cylinder 31 through the intermediate water inlet 414, the intermediate valve cavity 45, the corresponding through hole 416, the second axial water port, the second water channel 422, the second radial water port and the first water inlet 410. The fourth radial water port and the fourth axial water port of the two fourth water channels 424 on the second valve core 427 are blocked. The water flow ports at both ends of the third water channel 423 are aligned with the second water inlet 412 and the second water outlet 413 respectively. The second concentrated water in the second right sub-cavity 324 of the second hydraulic cylinder 32 is discharged from the second water outlet 413 after passing through the third water channel 423 of the rotary control valve 4.

[0097] P4: Valve core 42 rotates another 90 degrees from the P3 position, recorded as the "270-degree position". This state is as follows: Figure 9 As shown, the second radial and second axial water inlets of the two second water channels 422 of the first valve core 426 are blocked. The flow outlets at both ends of the first water channel 421 are aligned with the first water inlet 410 and the first water outlet 411. The second concentrated water in the first right sub-cavity 314 of the first hydraulic cylinder 31 is discharged from the first water outlet 411 after passing through the first water channel 421 of the rotary control valve 4. The flow outlets at both ends of the third water channel 423 of the second valve core 427 are blocked. The fourth radial water inlet of the other fourth water channel 424 of the second valve core 427 is aligned with the second water inlet 412, and the fourth axial water inlet is aligned with the corresponding through hole 416. The first concentrated water generated by the reverse osmosis device 2 enters the second right sub-cavity 324 of the second hydraulic cylinder 32 through the intermediate inlet 414, the intermediate valve cavity 45, the corresponding through hole 416, the fourth axial water inlet, the fourth water channel 424, the fourth radial water inlet, and the second water inlet 412.

[0098] P5: Valve core 42 rotates another 90 degrees from position P4, denoted as the "360-degree position". This state coincides with the "0-degree position" of P1. This state is as follows: Figure 10As shown, the second radial water inlet of the second water channel 422 of the first valve core 426 is connected to the first water inlet 410, and the second axial water inlet is connected to the through hole 416 on the corresponding partition 415. The flow outlets at both ends of the first water channel 421 are blocked by the valve body 41. The first concentrated water generated by the reverse osmosis device 2 enters the first right sub-cavity 314 of the first hydraulic cylinder 31 through the intermediate inlet 414, the intermediate valve cavity 45, the corresponding through hole 416, the second axial water inlet, the second water channel 422, the second radial water inlet, and the first water inlet 410. The fourth radial water inlet and the fourth axial water inlet of the two fourth water channels 424 on the second valve core 427 are blocked, while the flow outlets at both ends of the third water channel 423 are aligned with the second water inlet 412 and the second water outlet 413 respectively. The second concentrated water in the second right sub-cavity 324 of the second hydraulic cylinder 32 is discharged from the second water outlet 413 after passing through the third water channel 423 of the rotary control valve 4.

[0099] Once the valve core 42 completes one 360-degree circular rotation, it then begins another 360-degree circular rotation under the action of the control valve actuator 48.

[0100] The energy conversion control system provided by this invention sends desulfurization wastewater from the raw water tank into a reverse osmosis unit for concentration treatment. After concentration, the desulfurization wastewater generates permeable water and a first concentrate. The permeable water is discharged from the second outlet of the reverse osmosis unit and enters other processes, while the first concentrate is discharged from the third outlet of the reverse osmosis unit and enters a pressure regulating device. The pressure regulating device uses the pressure of the first concentrate to adjust the pressure of the desulfurization wastewater discharged from the second outlet of the raw water tank, thereby increasing the pressure of the desulfurization wastewater through the first concentrate, making it a higher-pressure first desulfurization wastewater. The first desulfurization wastewater is then pressure-regulated. The pipeline assembly and the first pipeline enter the reverse osmosis unit, ensuring that the pressure of the desulfurization wastewater entering the unit meets the unit's inlet pressure requirements. The reverse osmosis unit concentrates and reduces the volume of the desulfurization wastewater. To facilitate pressure adjustment of the desulfurization wastewater discharged from the second water tank outlet, a rotary control valve is installed on the third pipeline between the third outlet and the pressure regulating device. This valve controls the first concentrated water to enter the pressure regulating device, thus regulating the pressure of the desulfurization wastewater also entering the device. After depressurization, the first concentrated water becomes the second concentrated water and flows out from the pressure regulating device and the rotary control valve. To prevent vibration or water flow knocking caused by a vacuum in the drainage pipeline, a vacuum breaking component is installed on the drainage pipeline at the outlet of the rotary control valve. This component draws air into the drainage pipeline to break the vacuum, preventing vibration and water flow knocking. The energy conversion system provided by this invention utilizes the pressure energy of the first concentrated water with a certain pressure generated by the reverse osmosis unit to concentrate desulfurization wastewater, thereby improving the energy utilization rate and solving the problem of energy waste caused by the first concentrated water generated in the process of treating desulfurization wastewater being discharged after being regulated by valves or pressure reduced by flow-limiting orifice plates in the prior art.

[0101] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0102] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0103] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. An energy conversion control system, characterized in that, The energy conversion control system includes: The raw water tank (1) has a first water tank outlet and a second water tank outlet, which are used to store and output desulfurization wastewater; The reverse osmosis device (2) has a first inlet, a second outlet and a third outlet. The first inlet is connected to the outlet of the first water tank through a first pipe (91). The reverse osmosis device (2) is used to concentrate desulfurization wastewater to generate product water and a first concentrated water. The product water is discharged through the second outlet and the first concentrated water is discharged through the third outlet. The pressure regulating device (3) is connected to the first pipeline (91) through the pressure regulating pipeline group (95), to the outlet of the second water tank through the second pipeline group (92), and to the third outlet through the third pipeline (93). The pressure regulating device (3) uses the first concentrated water discharged from the third outlet to regulate the pressure of the desulfurization wastewater discharged from the outlet of the second water tank of the raw water tank (1) to become the first desulfurization wastewater. The first concentrated water after depressurization becomes the second concentrated water. The first desulfurization wastewater is sent into the reverse osmosis device (2) through the pressure regulating pipeline group (95) and the first pipeline (91). A rotary control valve (4), disposed on the third pipe (93), is used to control the first concentrated water to enter the pressure regulating device (3) through the third pipe (93) and to control the second concentrated water to be discharged from the pressure regulating device (3); the rotary control valve (4) includes: The valve body (41) has a valve cavity, and a first water inlet hole (410), a first water outlet hole (411), a second water inlet hole (412), a second water outlet hole (413) and an intermediate water inlet hole (414) are provided on the cavity wall of the valve cavity. The valve core (42) is rotatably disposed within the valve cavity and is provided with a first water channel (421), a third water channel (423), a pair of second water channels (422), and a pair of fourth water channels (424). By adjusting the rotation angle of the valve core (42) within the valve cavity, it is possible to control the connection or disconnection of the first water inlet (410) and the first water outlet (411) through the first water channel (421), the connection or disconnection of the first water inlet (410) and the intermediate water inlet (414) through the corresponding second water channel (422), the connection or disconnection of the second water inlet (412) and the second water outlet (413) through the third water channel (423), and the connection or disconnection of the second water inlet (412) and the intermediate water inlet. (414) Connected or disconnected through the corresponding fourth waterway (424); wherein, the flow outlets at both ends of the first waterway (421), the flow outlets at both ends of the third waterway (423), the flow outlet at the end of the second waterway (422) facing the first water inlet (410), and the flow outlet at the end of the fourth waterway (424) facing the second water inlet (412) are all provided with buffer grooves (47), and when the liquid flows through the flow outlets of the first waterway (421), the second waterway (422), the third waterway (423), and the fourth waterway (424), the vibration caused by the change in flow rate can be alleviated by the corresponding buffer grooves (47), wherein the buffer groove (47) is an arc-shaped groove; A control valve actuator (48) is used to drive the valve core (42) to rotate within the valve chamber; The vacuum breaking component (5) is connected to the outlet of the rotary control valve (4) via a drain pipe and is used to draw in air to break the vacuum that appears in the drain pipe.

2. The energy conversion control system according to claim 1, characterized in that, The pressure regulating device (3) includes: a first water pressure cylinder (31) and a second water pressure cylinder (32); The first water pressure cylinder (31) has a first pressure regulating port (33), a second pressure regulating port (34) and a third pressure regulating port (35). The first pressure regulating port (33) is connected to the first pipe (91) through a pressure regulating pipe group (95). The second pressure regulating port (34) is connected to the outlet of the second water tank through a second pipe group (92). The third pressure regulating port (35) is connected to the third outlet through a third pipe (93). The second water pressure cylinder (32) has a fourth pressure regulating port (36), a fifth pressure regulating port (37) and a sixth pressure regulating port (38). The fourth pressure regulating port (36) is connected to the first pipe (91) through a pressure regulating pipe group (95). The fifth pressure regulating port (37) is connected to the outlet of the second water tank through a second pipe group (92). The sixth pressure regulating port (38) is connected to the third outlet through a third pipe (93). The first water pressure cylinder (31) and the second water pressure cylinder (32) are both used to adjust the pressure of the desulfurization wastewater discharged from the outlet of the second water tank of the raw water tank (1) using the first concentrated water to become the first desulfurization wastewater. The first desulfurization wastewater is sent into the reverse osmosis device (2) through the pressure regulating pipeline group (95) and the first pipeline (91).

3. The energy conversion control system according to claim 1, characterized in that, The valve body (41) has a pair of partitions (415) inside its valve cavity, which divide the valve cavity into a first valve cavity (43), a second valve cavity (44), and an intermediate valve cavity (45) located between the first valve cavity (43) and the second valve cavity (44). Each partition (415) has a through hole (416), and the first valve cavity (43) and the second valve cavity (44) are connected to the intermediate valve cavity (45) through the corresponding through hole (416). The first water inlet hole (410) and the first water outlet hole (411) are opened on the cavity wall of the first valve cavity (43), the second water inlet hole (412) and the second water outlet hole (413) are opened on the cavity wall of the second valve cavity (44), and the intermediate water inlet hole (414) is opened on the cavity wall of the intermediate valve cavity (45).

4. The energy conversion control system according to claim 3, characterized in that, The valve core (42) includes a connecting shaft (425) and a cylindrical first valve core portion (426) and a second valve core portion (427). The first valve core portion (426) is rotatably disposed in the first valve cavity (43), and the second valve core portion (427) is rotatably disposed in the second valve cavity (44). The connecting shaft (425) is located in the intermediate valve cavity (45) and fixed to the first valve core portion (426) and the second valve core portion (427). A first water channel (421) and a pair of second water channels (422) are disposed on the first valve core portion (426), and a third water channel (423) and a pair of fourth water channels (424) are disposed on the second valve core portion (426). 7) Adjust the valve core (42) to rotate, the first water inlet hole (410) and the middle water inlet hole (414) are connected or disconnected through the corresponding second water channel (422), the corresponding through hole (416) and the middle valve chamber (45), the first water inlet hole (410) and the first water outlet hole (411) are connected or disconnected through the first water channel (421), the second water inlet hole (412) and the middle water inlet hole (414) are connected or disconnected through the corresponding fourth water channel (424), the corresponding through hole (416) and the middle valve chamber (45), and the second water inlet hole (412) and the second water outlet hole (413) are connected or disconnected through the third water channel (423).

5. The energy conversion control system according to claim 4, characterized in that, The first waterway (421) and the third waterway (423) are arranged perpendicularly to each other.

6. The energy conversion control system according to claim 5, characterized in that, A pair of second water channels (422) are arranged symmetrically with respect to the rotation centerline of the first valve core (426), and a pair of fourth water channels (424) are arranged symmetrically with respect to the rotation centerline of the second valve core (427).

7. The energy conversion control system according to claim 5, characterized in that, The first waterway (421) is arranged radially along the first valve core (426). When the first water inlet (410) and the first water outlet (411) are connected, the water outlets at both ends of the first waterway (421) are connected to the first water inlet (410) and the first water outlet (411) respectively.

8. The energy conversion control system according to claim 7, characterized in that, Each second waterway (422) includes: a second radial waterway section (4221) and a second axial waterway section (4222) connected to the second radial waterway section (4221); the second radial waterway section (4221) is arranged radially along the first valve core (426), the second axial waterway section (4222) is arranged axially along the first valve core (426), the water outlet of the second waterway (422) at one end of the second radial waterway section (4221) is the second radial water outlet, and the water outlet of the second waterway (422) at one end of the second axial waterway section (4222) is the second axial water outlet; when the first water inlet (410) is connected to the intermediate water inlet (414), the second radial water outlet of the second waterway (422) is connected to the first water inlet (410), and the second axial water outlet of the second waterway (422) is connected to the corresponding through hole (416).

9. The energy conversion control system according to claim 5, characterized in that, The third waterway (423) is arranged radially along the second valve core (427). When the second water inlet (412) and the second water outlet (413) are connected, the water outlets at both ends of the third waterway (423) are connected to the second water inlet (412) and the second water outlet (413) respectively.

10. The energy conversion control system according to claim 9, characterized in that, Each fourth waterway (424) includes: a fourth radial waterway section (4241) and a fourth axial waterway section (4242) connected to the fourth radial waterway section (4241); the fourth radial waterway section (4241) is arranged radially along the second valve core (427), the fourth axial waterway section (4242) is arranged axially along the second valve core (427), the flow port of the fourth waterway (424) at one end of the fourth radial waterway section (4241) is the fourth radial water port, and the flow port of the fourth waterway (424) at one end of the fourth axial waterway section (4242) is the fourth axial water port; when the second water inlet hole (412) is connected to the intermediate water inlet hole (414), the fourth radial water port of the fourth waterway (424) is connected to the second water inlet hole (412), and the fourth axial water port of the fourth waterway (424) is connected to the corresponding through hole (416).

11. The energy conversion control system according to claim 10, characterized in that, The buffer groove (47) is opened along the circumference of the first valve core (426) at the flow outlets at both ends of the first waterway (421) and at the second radial outlets of each second waterway (422), and along the circumference of the second valve core (427) at the flow outlets at both ends of the third waterway (423) and at the fourth radial outlets of each fourth waterway (424).

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