Energy cycle control system

Abstract

The invention relates to the technical field of wastewater treatment, and discloses an energy circulation control system, which comprises a raw water tank, a first water tank outlet and a second water tank outlet, the reverse osmosis device is provided with a first water inlet, a first water outlet and a second water outlet, the first water inlet is connected with the outlet of the first water tank, the reverse osmosis device is used for concentrating the desulfurization wastewater to generate produced water and high-pressure concentrated water, the produced water is discharged through the first water outlet, and the high-pressure concentrated water is discharged through the second water outlet; the energy conversion device is respectively connected with the first water inlet, the outlet of the second water tank and the second water outlet so as to regulate the pressure of high-pressure concentrated water discharged from the second water outlet and low-pressure wastewater discharged from the outlet of the second water tank, so that the pressure of the low-pressure wastewater is increased to become high-pressure wastewater which flows into the reverse osmosis device through the first water inlet; and the high-pressure concentrated water is decompressed into low-pressure concentrated water and is discharged. The method has the effect of improving the energy utilization rate.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment, and in particular to an energy cycle control system. Background Art

[0002] At present, the standards for wastewater discharge are very strict. As for power plants, as major water users and dischargers, their water consumption accounts for 20% of the 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. At present, in the field of zero discharge treatment of desulfurization wastewater, the use of membrane method for concentration and reduction is the main process. The TDS of desulfurization wastewater is usually around 50,000 ppm. After being concentrated by multi-stage reverse osmosis membranes, the TDS of concentrated water can reach 100,000 ppm. The concentrated water is then sent to the crystallization evaporation and drying process to eventually form crystalline salt solids.

[0003] In the current desulfurization wastewater treatment process, the desulfurization wastewater is usually pressurized by 100% of the water volume and enters the high-pressure pump. Then, through the continued pressurization of the high-pressure pump, it enters the reverse osmosis system and is partially concentrated into high-TDS high-pressure concentrated water through the concentration and separation of the reverse osmosis membrane. In order to overcome the osmotic pressure of the high-TDS desulfurization wastewater, the desulfurization wastewater requires a very high water inlet pressure (50bar~120bar) in the reverse osmosis membrane system. After reverse osmosis concentration, the pressure of the high-TDS concentrated water is often reduced by 1~2bar. After that, the high-pressure concentrated water of this part of the reverse osmosis system is usually reduced by valve regulation or flow limiting orifice plate. It is usually reduced to less than 10bar to become low-pressure concentrated water. The low-pressure concentrated water after decompression is discharged into the crystallization evaporation drying process. In this way, the energy of the concentrated water is not effectively utilized, resulting in energy waste. Therefore, a system is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of this application is to overcome the problems of energy waste and insufficient stability in the prior art and to provide an energy circulation control system which has the function of improving energy utilization and stability.

[0005] In order to achieve the above objectives, the present application provides an energy cycle control system, comprising:

[0006] A raw water tank having a first water tank outlet and a second water tank outlet;

[0007] A reverse osmosis device, having a first water inlet, a first water outlet, and a second water outlet, wherein the first water inlet is connected to the outlet of the first water pool, and the reverse osmosis device is used to concentrate the desulfurization wastewater to generate produced water and high-pressure concentrated water, wherein the produced water is discharged through the first water outlet, and the high-pressure concentrated water is discharged through the second water outlet;

[0008] The energy conversion device is respectively connected to the first water inlet, the second water pool outlet, and the second water outlet to regulate the pressure of the high-pressure concentrated water discharged from the second water outlet and the low-pressure wastewater discharged from the second water pool outlet, so that the pressure of the low-pressure wastewater is increased to become high-pressure wastewater and flow into the reverse osmosis device through the first water inlet, and at the same time, the high-pressure concentrated water is depressurized to become low-pressure concentrated water and discharged.

[0009] In some embodiments, a high-pressure pump is provided between the first water pool outlet and the first water inlet, a booster pump is provided between the energy conversion device and the first water inlet, and the booster pump is located between the high-pressure pump and the first water inlet.

[0010] In some embodiments, the energy conversion device comprises:

[0011] The first hydraulic cylinder has a first pressure regulating water port, a second pressure regulating water port and a third pressure regulating water port, the first pressure regulating water port is connected to the first water inlet, the second pressure regulating water port is connected to the second water tank outlet, and the third pressure regulating water port is connected to the second water outlet;

[0012] The second hydraulic cylinder has a fourth pressure regulating water port, a fifth pressure regulating water port and a sixth pressure regulating water port, the fourth pressure regulating water port is connected to the first water inlet, the fifth pressure regulating water port is connected to the second water tank outlet, and the sixth pressure regulating water port is connected to the second water outlet;

[0013] A fluid switcher is connected to the second water outlet, the third pressure regulating water outlet is connected to the second water outlet through the fluid switcher, the sixth pressure regulating water outlet is connected to the second water outlet through the fluid switcher, and a drain pipe is connected to the fluid switcher.

[0014] The first hydraulic cylinder and the second hydraulic cylinder are both used to adjust the pressure of the incoming high-pressure concentrated water and low-pressure desulfurization wastewater. The low-pressure desulfurization wastewater is pressurized to become high-pressure desulfurization wastewater and sent to the reverse osmosis device. The high-pressure concentrated water is depressurized to become low-pressure concentrated water and is discharged.

[0015] In some embodiments, the fluid switch includes:

[0016] The cylinder is hollow and has openings at both ends. The cylinder is provided with a high-pressure water inlet, a low-pressure water outlet, a first conversion port, and a second conversion port;

[0017] A rotating shaft, the rotating shaft is rotatably arranged in the cylinder;

[0018] A driving member connected to the rotating shaft to drive the rotating shaft to rotate;

[0019] During the rotation of the rotating shaft, the high-pressure water inlet is connected to or disconnected from the second conversion port, and when the high-pressure water inlet is connected to the second conversion port, the low-pressure water outlet is connected to the first conversion port;

[0020] During the rotation of the rotating shaft, the high-pressure water inlet is connected to or disconnected from the first conversion port, and when the high-pressure water inlet is connected to the first conversion port, the low-pressure water outlet is connected to the second conversion port;

[0021] In addition, during the rotation of the rotating shaft, the water passage diameters of the high-pressure water inlet, the low-pressure water outlet, the first conversion port and the second conversion port change.

[0022] In some embodiments, a first piston and a second piston are coaxially sleeved on the rotating shaft, and the first piston and the second piston are axially spaced apart from each other along the rotating shaft;

[0023] The rotating shaft is hollow inside to form an inner flow channel, and a first communicating hole and a second communicating hole are opened on the rotating shaft, the first communicating hole is covered by the first piston, and the second communicating hole is covered by the second piston, and the first communicating hole and the second communicating hole are both connected to the inner flow channel;

[0024] The first piston is provided with two first axial water channels, four first radial water channels and one first circulation water channel, the two first axial water channels are not connected to each other, the four first radial water channels are not connected to each other, the two first axial water channels are respectively connected to two of the first radial water channels, the first circulation water channel is connected to one of the remaining first radial water channels, the first communication hole is connected to another of the remaining first radial water channels, the first axial water channel and the first circulation water channel are not connected to each other, the opening of the first axial water channel faces away from the second piston, and the opening of the first circulation water channel faces the second piston;

[0025] The second piston is provided with two second axial water channels, four second radial water channels and one second circulation water channel, the two second axial water channels are not connected to each other, the four second radial water channels are not connected to each other, the two second axial water channels are respectively connected to two of the second radial water channels, the second circulation water channel is connected to one of the remaining second radial water channels, the second communication hole is connected to another of the remaining second radial water channels, the second axial water channel and the second circulation water channel are not connected to each other, the opening of the second axial water channel faces away from the first piston, and the opening of the second circulation water channel faces the first piston;

[0026] When the rotating shaft is in the initial state, the high-pressure water inlet is connected to the second radial water channel, the first conversion port is connected to the first radial water channel, and the second radial water channel is connected to the first radial water channel through the inner flow channel. At this time, the low-pressure water outlet is connected to the first radial water channel, the second conversion port is connected to the second radial water channel, and the first radial water channel is connected to the second radial water channel through the second circulation water channel and the first circulation water channel.

[0027] Adjust the rotation angle of the rotating shaft, when the high-pressure water inlet is connected to the second conversion port through the second axial water channel and the second radial water channel, the low-pressure water outlet is connected to the first conversion port through the first axial water channel and the first radial water channel;

[0028] Adjust the rotation angle of the rotating shaft. When the high-pressure water inlet is connected to the first conversion port through the second radial water channel, the second circulation water channel, the first circulation water channel, and the first radial water channel, the low-pressure water outlet is connected to the second conversion port through the first radial water channel, the first connecting hole, the inner flow channel, the second connecting hole, and the second radial water channel.

[0029] In some embodiments, the two first axial water channels and the two second axial water channels are both symmetrically arranged about the axis of the rotation shaft.

[0030] In some embodiments, the first flow channel and the second flow channel are respectively located on two sides of the rotation axis.

[0031] In some embodiments, the four first radial water channels are evenly spaced apart along the circumference of the first piston, and the four second radial water channels are evenly spaced apart along the circumference of the second piston.

[0032] In some embodiments, a plurality of buffer grooves are provided on the first piston and the second piston, and the plurality of buffer grooves are respectively located at the openings of the first radial water channel and the second radial water channel.

[0033] In some embodiments, two buffer grooves are provided at each opening, and the two buffer grooves are evenly spaced apart along the circumference of the opening.

[0034] Through the above technical scheme, the low-pressure desulfurization wastewater in the raw water tank flows out from the outlet of the first water tank and enters the reverse osmosis device through the first water inlet for concentration treatment. The desulfurization wastewater after concentration treatment generates product water and high-pressure concentrated water. The product water is discharged from the first water outlet of the reverse osmosis device and enters other processes, while the high-pressure concentrated water is discharged from the second water outlet of the reverse osmosis device and enters the energy conversion device. At the same time, the low-pressure desulfurization wastewater in the raw water tank enters the energy conversion device through the outlet of the second water tank.

[0035] The high-pressure concentrated water and the low-pressure desulfurized wastewater are pressure-regulated in the energy conversion device, and the pressure of the low-pressure desulfurized wastewater is increased by the high-pressure concentrated water so that the low-pressure desulfurized wastewater becomes desulfurized wastewater with a higher pressure, and flows into the reverse osmosis device through the first water inlet, thereby ensuring that the pressure of the desulfurized wastewater entering the reverse osmosis device meets the requirements of the reverse osmosis device for the water inlet pressure, and the desulfurized wastewater is concentrated and reduced by the reverse osmosis device, and the high-pressure concentrated water becomes low-pressure concentrated water after the pressure is released and flows out of the energy conversion device. The energy conversion system disclosed in the present invention utilizes the pressure energy in the high-pressure concentrated water with a certain pressure generated after the reverse osmosis device concentrates the desulfurized wastewater, optimizes the energy waste phenomenon generated when treating desulfurized wastewater in the prior art, and improves the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the flow of the energy cycle control system in the embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the structure of the energy conversion device in the embodiment of the present application;

[0038] Figure 3 It is a structural schematic diagram of a flow control valve in an embodiment of the present application;

[0039] Figure 4 is a cross-sectional view of a rotating shaft in an embodiment of the present application;

[0040] Figure 5 is a cross-sectional view of another fixed angle of the rotating axis in the embodiment of the present application;

[0041] Figure 6 is a cross-sectional view of an embodiment of the present application in which the rotating shaft is in an initial state;

[0042] Figure 7 is a cross-sectional view of the embodiment of the present application after the rotating shaft is rotated 90° counterclockwise;

[0043] Figure 8 is a cross-sectional view of the embodiment of the present application after the rotating shaft is rotated 180° counterclockwise;

[0044] Fig. 9 is a cross-sectional view after the rotating shaft rotates 270° counterclockwise in the embodiment of the present application;

[0045] Fig.10 is a cross-sectional view after the rotating shaft rotates 360° counterclockwise in the embodiment of the present application;

[0046] Description of Reference Numerals

[0047] 1. Raw water pool; 2. Reverse osmosis device; 21. First water inlet; 22. First water outlet; 23. Second water outlet; 3. Energy conversion device; 31. First hydraulic cylinder; 311. First pressure regulating water inlet; 312. Second pressure regulating water inlet; 313. Third pressure regulating water inlet; 314. First hydraulic piston; 32. Second hydraulic cylinder; 321. Fourth pressure regulating water inlet; 322. Fifth pressure regulating water inlet; 323. Sixth pressure regulating water inlet; 324. Second hydraulic piston; 33. Fluid switch; 331. Cylinder; 332. High pressure water inlet; 333. Low pressure water outlet; 334. First variable Change port; 335, second change port; 336, rotating shaft; 3361, inner flow channel; 3362, first connecting hole; 3363, second connecting hole; 337, driving member; 338, first piston; 3381, first flow channel port; 3382, first axial water channel; 3383, first radial water channel; 3384, first circulation water channel; 339, second piston; 3391, second flow channel port; 3392, second axial water channel; 3393, second radial water channel; 3394, second circulation water channel; 3310, buffer tank; 34, drain pipe; 4, high-pressure pump; 5, booster pump. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1-10 The following detailed descriptions and drawings of the embodiments are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0049] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0050] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0051] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0052] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0053] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0054] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0055] The present application discloses an energy cycle control system, comprising:

[0056] The original water tank 1 has a first water tank outlet and a second water tank outlet;

[0057] The reverse osmosis device 2 has a first water inlet 21, a first water outlet 22 and a second water outlet 23. The first water inlet 21 is connected to the outlet of the first water tank. The reverse osmosis device 2 is used to concentrate the desulfurization wastewater to generate produced water and high-pressure concentrated water. The produced water is discharged through the first water outlet 22, and the high-pressure concentrated water is discharged through the second water outlet 23.

[0058] The energy conversion device 3 is respectively connected to the first water inlet 21, the second water tank outlet, and the second water outlet 23 to regulate the pressure of the high-pressure concentrated water discharged from the second water outlet 23 and the low-pressure wastewater discharged from the second water tank outlet, so that the pressure of the low-pressure wastewater is increased to become high-pressure wastewater and flow into the reverse osmosis device 2 through the first water inlet 21. At the same time, the high-pressure concentrated water is depressurized to become low-pressure concentrated water and discharged.

[0059] The energy circulation control system disclosed in the present application comprises a raw water tank 1 having a first water tank outlet and a second water tank outlet for storing and outputting low-pressure desulfurization wastewater.

[0060] The first water tank outlet of the raw water tank 1 is connected to a first water tank outlet pipe, and the other end of the first water tank outlet pipe is provided with a reverse osmosis device 2, which is provided with a first water inlet 21, a first water outlet 22 and a second water outlet 23, and the first water tank outlet pipe is connected to the first water inlet 21. The reverse osmosis device 2 is used to concentrate the desulfurization wastewater to generate produced water and high-pressure concentrated water, the produced water is discharged through the first water outlet 22, and the high-pressure concentrated water is discharged through the second water outlet 23.

[0061] The outlet of the second water pool of the raw water pool 1 is connected to a second water pool outlet pipe, and the other end of the second water pool outlet pipe is provided with an energy conversion device 3, and the energy conversion device 3 is connected with a water inlet pipe and a high-pressure water outlet pipe for introducing high-pressure concentrated water, the high-pressure water outlet pipe is connected to the first water pool outlet pipe and thus connected to the first water inlet 21 of the reverse osmosis device 2, and the high-pressure concentrated water inlet pipe is connected to the second water outlet 23 of the reverse osmosis device 2. The energy conversion device 3 regulates the pressure of the high-pressure concentrated water discharged from the second water outlet 23 and the low-pressure desulfurized wastewater discharged from the outlet of the second water pool, so that the pressure of the low-pressure desulfurized wastewater is increased to become high-pressure desulfurized wastewater and flows into the reverse osmosis device 2 through the first water inlet 21, and at the same time, the high-pressure concentrated water is depressurized to become low-pressure concentrated water and discharged.

[0062] The low-pressure desulfurization wastewater in the raw water tank 1 flows out from the outlet of the first water tank and enters the reverse osmosis device 2 through the first water inlet 21 for concentration treatment. The desulfurization wastewater after concentration treatment generates product water and high-pressure concentrated water. The product water is discharged from the first water outlet 22 of the reverse osmosis device 2 and enters other processes, while the high-pressure concentrated water is discharged from the second water outlet 23 of the reverse osmosis device 2 and enters the energy conversion device 3. At the same time, the low-pressure desulfurization wastewater in the raw water tank 1 enters the energy conversion device 3 through the outlet of the second water tank.

[0063] The high-pressure concentrated water and the low-pressure desulfurized wastewater are pressure-regulated in the energy conversion device 3, and the pressure of the low-pressure desulfurized wastewater is increased by the high-pressure concentrated water so that the low-pressure desulfurized wastewater becomes desulfurized wastewater with a higher pressure, and flows into the reverse osmosis device 2 through the first water inlet 21, thereby ensuring that the pressure of the desulfurized wastewater entering the reverse osmosis device 2 meets the requirements of the reverse osmosis device 2 for the water inlet pressure, and the desulfurized wastewater is concentrated and reduced by the reverse osmosis device 2, and the high-pressure concentrated water becomes low-pressure concentrated water after the pressure is released and flows out of the energy conversion device 3. The energy conversion system disclosed in the present invention utilizes the pressure energy in the high-pressure concentrated water with a certain pressure generated after the reverse osmosis device 2 concentrates the desulfurized wastewater, optimizes the energy waste phenomenon generated in the prior art when treating desulfurized wastewater, and improves the energy utilization rate.

[0064] In some embodiments, a high-pressure pump 4 is provided between the first water pool outlet and the first water inlet 21 , a booster pump 5 is provided between the energy conversion device 3 and the first water inlet 21 , and the booster pump 5 is located between the high-pressure pump 4 and the first water inlet 21 .

[0065] In some embodiments, a water supply pump and a high-pressure pump 4 are provided on the outlet pipe of the first water tank, a water supply pump is provided on the outlet pipe of the second water tank, and a booster pump 5 is provided on the high-pressure outlet pipe of the energy conversion device 3. The connection position between the outlet pipe of the first water tank and the high-pressure outlet pipe is located between the high-pressure pump 4 and the reverse osmosis device 2. The low-pressure desulfurization wastewater discharged from the raw water tank 1 is pressurized by the high-pressure pump 4, and the high-pressure desulfurization wastewater discharged from the energy conversion device 3 is further pressurized by the booster pump 5, thereby ensuring that the pressure of the desulfurization wastewater entering the reverse osmosis device 2 meets the requirement of the reverse osmosis device 2 for the water inlet pressure.

[0066] In some embodiments, the energy conversion device 3 includes:

[0067] The first hydraulic cylinder 31 has a first pressure regulating water port 311, a second pressure regulating water port 312 and a third pressure regulating water port 313, the first pressure regulating water port 311 is connected to the first water inlet 21, the second pressure regulating water port 312 is connected to the second water tank outlet, and the third pressure regulating water port 313 is connected to the second water outlet 23;

[0068] The second hydraulic cylinder 32 has a fourth pressure regulating water port 321, a fifth pressure regulating water port 322 and a sixth pressure regulating water port 323, the fourth pressure regulating water port 321 is connected to the first water inlet 21, the fifth pressure regulating water port 322 is connected to the second water tank outlet, and the sixth pressure regulating water port 323 is connected to the second water outlet 23;

[0069] The fluid switcher 33 is connected to the second water outlet 23 , the third pressure regulating water outlet 313 is connected to the second water outlet 23 through the fluid switcher 33 , the sixth pressure regulating water outlet 323 is connected to the second water outlet 23 through the fluid switcher 33 , and a drain pipe 34 is connected to the fluid switcher 33 .

[0070] The first hydraulic cylinder 31 and the second hydraulic cylinder 32 are both used to adjust the pressure of the inflowing high-pressure concentrated water and low-pressure desulfurized wastewater. The low-pressure desulfurized wastewater is pressurized to become high-pressure desulfurized wastewater and is sent to the reverse osmosis device 2. The high-pressure concentrated water is depressurized to become low-pressure concentrated water and is discharged.

[0071] In some embodiments, the energy conversion device 3 includes a first hydraulic cylinder 31 , a second hydraulic cylinder 32 and a fluid switch 33 .

[0072] The first hydraulic cylinder 31 includes a first cylinder body and a first hydraulic piston 314 slidably disposed in the first cylinder body. The first hydraulic piston 314 divides the inner cavity of the first cylinder body into a first left sub-cavity and a first right sub-cavity. A first pressure regulating water port 311 and a second pressure regulating water port 312 are disposed on the outer wall of the first left sub-cavity. A third pressure regulating water port 313 is disposed on the outer wall of the first right sub-cavity. Check valves are disposed at the first pressure regulating water port 311 and the second pressure regulating water port 312 to prevent backflow.

[0073] The second hydraulic cylinder 32 includes a second cylinder body and a second hydraulic piston 324 slidably arranged in the second cylinder body. The second hydraulic piston 324 divides the inner cavity of the second cylinder body into a second left sub-cavity and a second right sub-cavity. A fourth pressure regulating water port 321 and a fifth pressure regulating water port 322 are arranged on the outer wall of the second left sub-cavity. A sixth pressure regulating water port 323 is arranged on the outer wall of the second right sub-cavity. Check valves are arranged at the fourth pressure regulating water port 321 and the fifth pressure regulating water port 322 to prevent backflow.

[0074] A fluid switch 33 is connected to the same side of the first hydraulic cylinder 31 and the second hydraulic cylinder 32 , and a drain pipe 34 is connected to the fluid switch 33 .

[0075] The first pressure regulating water inlet 311 and the fourth pressure regulating water inlet 321 are connected to the high-pressure water outlet pipe of the energy conversion device 3, the second pressure regulating water inlet 312 and the fifth pressure regulating water inlet 322 are connected to the water outlet pipe of the second water pool, and the third pressure regulating water inlet 313 and the sixth pressure regulating water inlet 323 are connected to the fluid switcher 33.

[0076] When the low-pressure desulfurization wastewater enters the first left sub-chamber through the outlet pipe of the second water tank, the low-pressure desulfurization wastewater can push the first hydraulic piston 314 to slide toward the first right sub-chamber, thereby squeezing the low-pressure concentrated water that has completed the pressure energy exchange before entering the first right sub-chamber through the fluid switcher 33 and discharged from the drain pipe 34. At the same time, the high-pressure concentrated water flows into the second right sub-chamber of the second hydraulic cylinder 32 through the fluid switcher 33. The high-pressure concentrated water pushes the second hydraulic piston 324 to move toward the second left sub-chamber. The high-pressure concentrated water transfers the pressure energy to the low-pressure desulfurization wastewater that has been introduced into the second left sub-chamber, so that the low-pressure desulfurization wastewater is pressurized to become high-pressure desulfurization wastewater and is discharged into the high-pressure outlet pipe through the fourth pressure regulating water port 321, and then flows into the reverse osmosis device 2 after further pressurization by the booster pump.

[0077] When the low-pressure desulfurization wastewater enters the second left sub-chamber through the second water tank outlet pipe, the working process is the same as above and will not be repeated here.

[0078] In some embodiments, the fluid switch 33 includes:

[0079] The fluid switcher 33 includes a cylinder 331, which is hollow and has openings at both ends to form a long cylindrical shape. The hollow interior of the cylinder 331 forms an inner cavity. A first conversion port 334 and a second conversion port 335 are provided at the upper portion of the cylinder 331, and a high-pressure water inlet 332 and a low-pressure water outlet 333 are provided at the lower portion of the cylinder 331. The first conversion port 334, the second conversion port 335, the high-pressure water inlet 332, and the low-pressure water outlet 333 are all connected to the inner cavity. The first conversion port 334 and the low-pressure water outlet 333 are symmetrical about the axis of the cylinder 331, and the second conversion port 335 and the high-pressure water inlet 332 are symmetrical about the axis of the cylinder 331.

[0080] A rotating shaft 336 is rotatably disposed in the cylinder 331 , and the rotating shaft 336 is coaxial with the cylinder 331 .

[0081] A driving member 337 is disposed outside the cylinder 331. The driving member 337 is connected to one end of the rotating shaft 336. Driven by the driving member 337, the rotating shaft 336 rotates in the circumferential direction. During the rotation of the rotating shaft 336, the high-pressure water inlet 332 can be connected or disconnected with the second conversion port 335. When the high-pressure water inlet 332 is connected with the second conversion port 335, the low-pressure water outlet 333 is connected with the first conversion port 334.

[0082] By adjusting the rotation angle of the rotating shaft 336 , the high-pressure water inlet 332 can be connected to or disconnected from the first conversion port 334 . When the high-pressure water inlet 332 is connected to the first conversion port 334 , the low-pressure water outlet 333 is connected to the second conversion port 335 .

[0083] During the rotation of the rotating shaft 336 , the water passage diameters of the high-pressure water inlet 332 , the low-pressure water outlet 333 , the first conversion port 334 , and the second conversion port 335 change.

[0084] The fluid switcher 33 provided in the embodiment of the present application is connected to other devices in the energy cycle control system. In the initial state, the high-pressure water inlet 332 is connected to the high-pressure concentrated water pipe of the second water outlet 23 of the reverse osmosis device 2, the low-pressure water outlet 333 is connected to the water outlet of the drain pipe 34, the first conversion port 334 is connected to the second hydraulic cylinder 32, the second conversion port 335 is connected to the first hydraulic cylinder 31, the first conversion port 334 is connected to the high-pressure water inlet 332, the second conversion port 335 is connected to the low-pressure water outlet 333, the low-pressure desulfurization wastewater is charged into the first hydraulic cylinder 31, the low-pressure concentrated water in the first hydraulic cylinder 31 is discharged from the low-pressure water outlet 333, the high-pressure concentrated water enters the second hydraulic cylinder 32 through the high-pressure water inlet 332, and the high-pressure concentrated water entering the second hydraulic cylinder 32 exchanges pressure energy with the existing low-pressure water flow in the second hydraulic cylinder 32, so that the low-pressure wastewater becomes high-pressure wastewater, and the high-pressure wastewater is then discharged from the fourth pressure regulating water port 321 of the second hydraulic cylinder 32. The rotating shaft 336 rotates driven by the driving member 337, and the water passage diameters of the first conversion port 334 and the second conversion port 335 change. The opening of the second conversion port 335 gradually decreases, resulting in the drainage of the first hydraulic cylinder 31 connected to the second conversion port 335 beginning to be blocked, and the amount of low-pressure concentrated water flowing out decreases, so that the low-pressure water outlet flow in the first hydraulic cylinder 31 gradually decreases. At the same time, the opening of the first conversion port 334 also gradually decreases, and the high-pressure concentrated water inlet of the second hydraulic cylinder 32 is blocked, so that the high-pressure water inlet flow in the second hydraulic cylinder 32 gradually decreases, thereby slowing down the flow change speed of the water flow during operation, thereby slowing down the violent vibration of the switch caused by the rapid change of the water flow in a short time, and improving the overall stability.

[0085] In some embodiments, a first piston 338 and a second piston 339 are coaxially sleeved on the rotating shaft 336 , and the first piston 338 and the second piston 339 are axially spaced apart from each other along the rotating shaft 336 ;

[0086] The rotating shaft 336 is hollow inside to form an inner flow channel 3361. The rotating shaft 336 is provided with a first communicating hole 3362 and a second communicating hole 3363. The first communicating hole 3362 is covered by the first piston 338, and the second communicating hole 3363 is covered by the second piston 339. Both the first communicating hole 3362 and the second communicating hole 3363 are in communication with the inner flow channel 3361.

[0087] The first piston 338 is provided with two first axial water channels 3382, four first radial water channels 3383 and one first circulation water channel 3384. The two first axial water channels 3382 are not communicated with each other. The four first radial water channels 3383 are not communicated with each other. The two first axial water channels 3382 are communicated with two of the first radial water channels 3383 respectively. The first circulation water channel 3384 is communicated with one of the remaining first radial water channels 3383. The first communication hole 3362 is communicated with another of the remaining first radial water channels 3383. The first axial water channel 3382 and the first circulation water channel 3384 are not communicated with each other. The opening of the first axial water channel 3382 faces away from the second piston 339, and the opening of the first circulation water channel 3384 faces the second piston 339.

[0088] The second piston 339 is provided with two second axial water channels 3392, four second radial water channels 3393 and one second circulation water channel 3394. The two second axial water channels 3392 are not communicated with each other, the four second radial water channels 3393 are not communicated with each other, the two second axial water channels 3392 are communicated with two of the second radial water channels 3393 respectively, the second circulation water channel 3394 is communicated with one of the remaining second radial water channels 3393, the second communication hole 3363 is communicated with another of the remaining second radial water channels 3393, the second axial water channel 3392 and the second circulation water channel 3394 are not communicated with each other, the opening of the second axial water channel 3392 faces away from the first piston 338, and the opening of the second circulation water channel 3394 faces the first piston 338;

[0089] When the rotating shaft 336 is in the initial state, the high-pressure water inlet 332 is in communication with the second radial water channel 3393, the first conversion port 334 is in communication with the first radial water channel 3383, and the second radial water channel 3393 is in communication with the first radial water channel 3383 through the inner flow channel 3361. At this time, the low-pressure water outlet 333 is in communication with the first radial water channel 3383, the second conversion port 335 is in communication with the second radial water channel 3393, and the first radial water channel 3383 is in communication with the second radial water channel 3393 through the second circulation water channel 3394 and the first circulation water channel 3384.

[0090] Adjust the rotation angle of the rotating shaft 336, when the high-pressure water inlet 332 is connected to the second conversion port 335 through the second axial water channel 3392 and the second radial water channel 3393, the low-pressure water outlet 333 is connected to the first conversion port 334 through the first axial water channel 3382 and the first radial water channel 3383;

[0091] Adjust the rotation angle of the rotating shaft 336. When the high-pressure water inlet 332 is connected to the first conversion port 334 through the second radial water channel 3393, the second circulation water channel 3394, the first circulation water channel 3384, and the first radial water channel 3383, the low-pressure water outlet 333 is connected to the second conversion port 335 through the first radial water channel 3383, the first connecting hole 3362, the inner flow channel 3361, the second connecting hole 3363, and the second radial water channel 3393.

[0092] In some embodiments, the interior of the rotating shaft 336 is hollow to form an inner flow channel 3361, and a first connecting hole 3362 and a second connecting hole 3363 are provided on the outer wall of the rotating shaft 336, and the first connecting hole 3362 and the second connecting hole 3363 are both connected to the inner flow channel 3361. The outer part of the rotating shaft 336 is coaxially sleeved with a first piston 338 and a second piston 339, and the first piston 338 and the second piston 339 are spaced apart along the axial direction of the rotating shaft 336, and the first piston 338 and the second piston 339 are both located in the inner cavity, and a first flow channel opening 3381 is provided on the first piston 338, and a second flow channel opening 3391 is provided on the second piston 339.

[0093] The first piston 338 is provided with two first axial water channels 3382, four first radial water channels 3383 and one first circulation water channel 3384. The two first axial water channels 3382 are not connected to each other. The first axial water channel 3382 is located on the side of the first piston 338 away from the second piston 339. The length direction of the first axial water channel 3382 is consistent with the axial direction of the first piston 338. The two first axial water channels 3382 are connected to two of the first radial water channels 3383.

[0094] The first flow channel 3381 includes four first radial water channels 3383 , the four first radial water channels 3383 are not connected to each other, the length direction of the first radial water channels 3383 is consistent with the radial direction of the first piston 338 , and one of the first radial water channels 3383 is connected to the first communicating hole 3362 .

[0095] The length direction of the first circulation water channel 3384 is consistent with the axial direction of the first piston 338 , the first circulation water channel 3384 is connected to one of the first radial water channels 3383 , the first circulation water channel 3384 is not connected to the two first axial water channels 3382 , and the first circulation water channel 3384 is located on the side of the first piston 338 facing the second piston 339 .

[0096] The second piston 339 is provided with two second axial water channels 3392, four second radial water channels 3393 and one second circulation water channel 3394. The two second axial water channels 3392 are not connected to each other. The second axial water channel 3392 is located on the side of the second piston 339 away from the first piston 338. The length direction of the second axial water channel 3392 is consistent with the axial direction of the second piston 339. The two second axial water channels 3392 are connected to two of the second radial water channels 3393.

[0097] The second flow channel opening 3391 includes four second radial water channels 3393 , the four second radial water channels 3393 are not connected to each other, the length direction of the second radial water channels 3393 is consistent with the radial direction of the second piston 339 , and one of the second radial water channels 3393 is connected to the second connecting hole 3363 .

[0098] The length direction of the second circulation water channel 3394 is consistent with the axial direction of the second piston 339 , the second circulation water channel 3394 is connected to one of the second radial water channels 3393 , the second circulation water channel 3394 is not connected to the two second axial water channels 3392 , and the second circulation water channel 3394 is located on the side of the second piston 339 facing the first piston 338 .

[0099] When the rotating shaft 336 is in the initial state, the high-pressure water inlet 332 is connected to the first conversion port 334 through the second radial water channel 3393, the second communication hole 3363, the inner flow channel 3361, the first communication hole 3362, and the first radial water channel 3383, and the low-pressure water outlet 333 is connected to the second conversion port 335 through the second radial water channel 3393, the second circulation water channel 3394, the first circulation water channel 3384, and the first radial water channel 3383. As the rotating shaft 336 rotates, the first conversion port 334 is gradually separated from the first radial water channel 3383, and the second conversion port 335 is gradually separated from the second radial water channel 3393.

[0100] After the rotating shaft 336 rotates 90° counterclockwise, the high-pressure water inlet 332 is connected to the second conversion port 335 through the second axial water channel 3392 and the second radial water channel 3393 , and the low-pressure water outlet 333 is connected to the first conversion port 334 through the first axial water channel 3382 and the first radial water channel 3383 .

[0101] After the rotating shaft 336 rotates 180° counterclockwise, the high-pressure water inlet 332 is connected to the first conversion port 334 through the second radial water channel 3393, the second circulation water channel 3394, the first circulation water channel 3384, and the first radial water channel 3383, and the low-pressure water outlet 333 is connected to the second conversion port 335 through the first radial water channel 3383, the first connecting hole 3362, the inner flow channel 3361, the second connecting hole 3363, and the second radial water channel 3393.

[0102] After the rotating shaft 336 rotates 270° counterclockwise, the high-pressure water inlet 332 is connected to the second conversion port 335 through the second axial water channel 3392 and the second radial water channel 3393 , and the low-pressure water outlet 333 is connected to the first conversion port 334 through the first axial water channel 3382 and the first radial water channel 3383 .

[0103] After the rotating shaft 336 rotates 360° counterclockwise, the connection state returns to the initial position.

[0104] During the rotation of the rotating shaft 336, a group of first conversion ports 334 and the first radial water channel 3383, and the second conversion ports 335 and the second radial water channel 3393 are connected to each other and then separated, and then another group of first conversion ports 334 and the first radial water channel 3383, and the second conversion ports 335 and the second radial water channel 3393 are separated to be connected. This process includes the following stages:

[0105] “Low-pressure filling” means that low-pressure desulfurization wastewater is charged into the first hydraulic cylinder 31 from the second pressure regulating water port 312 of the first hydraulic cylinder 31 , and the low-pressure concentrated water in the first hydraulic cylinder 31 is discharged from the low-pressure water outlet 333 .

[0106] "High-pressure exchange", high-pressure concentrated water enters the second hydraulic cylinder 32, and the high-pressure concentrated water enters the second hydraulic cylinder 32 from the high-pressure water inlet 332, and exchanges pressure energy with the existing low-pressure wastewater in the hydraulic cylinder, so that the low-pressure wastewater becomes high-pressure wastewater, and the high-pressure wastewater is then discharged from the fourth pressure regulating water outlet 321 of the second hydraulic cylinder 32 and enters the reverse osmosis device 2.

[0107] In the "slow closing" stage, the first piston 338 and the second piston 339 rotate counterclockwise driven by the driving member 337, and the first radial water channel 3383 and the second radial water channel 3393 are staggered with the first conversion port 334 and the second conversion port 335. As the staggered angle increases, the opening of the second conversion port 335 gradually decreases, causing the drainage of the first hydraulic cylinder 31 connected to the second conversion port 335 to begin to be blocked, and the amount of low-pressure concentrated water flowing out decreases, so that the low-pressure water outlet flow in the first hydraulic cylinder 31 is gradually reduced. At the same time, the opening of the first conversion port 334 is also gradually reduced, and the high-pressure concentrated water inlet of the second hydraulic cylinder 32 is blocked, so that the high-pressure water inlet flow in the second hydraulic cylinder 32 is gradually reduced.

[0108] The rotating shaft 336 continues to rotate counterclockwise under the drive of the driving member 337. At this time, the low-pressure inlet check valve of the first hydraulic cylinder 31 is slowly closed under the action of its own spring. At the same time, the high-pressure outlet check valve of the second hydraulic cylinder 32 is slowly closed under the action of its own spring. The water hammer problem that occurs when the high-pressure concentrated water inlet flow is instantly cut off is effectively avoided, and the slow closing effect of the check valve is achieved.

[0109] The "low-pressure pre-boost, high-pressure pre-decompression" stage is the "slow-opening stage". The rotating shaft 336 continues to rotate counterclockwise under the drive of the driving member 337, so that the first conversion port 334 and the first radial water channel 3383, the second conversion port 335 and the second radial water channel 3393 are completely staggered. At the same time, as the rotating shaft 336 continues to rotate, the next group of first radial water channels 3383 and second radial water channels 3393 rotate toward the first conversion port 334 and the second conversion port 335, until the first conversion port 334 and the first radial water channel 3383, the second conversion port 335 and the second radial water channel 3393 are completely connected. At this time, the first conversion port 334 and the first radial water channel 3383, the second conversion port 335 and the second radial water channel 3393 are completely connected. 334 is connected to the low-pressure water outlet 333, and the second conversion port 335 is connected to the high-pressure water outlet. The first hydraulic cylinder 31 gradually enters high-pressure concentrated water, which is "low-pressure pre-boosting", and is transformed into a high-pressure cylinder. However, at this time, the high-pressure water inlet flow in the first hydraulic cylinder 31 is small, and only the water pressure in the first hydraulic cylinder 31 is increased without a large flow of high-pressure water entering; the second hydraulic cylinder 32 gradually discharges the concentrated brine after pressure relief, which is "high-pressure pre-decompression", and is transformed into a low-pressure cylinder. However, at this time, the low-pressure drainage water flow in the second hydraulic cylinder 32 is small, and only the water pressure in the second hydraulic cylinder 32 is reduced without a large flow of low-pressure water flowing out. This ensures the stable change of the overall flow rate and reduces the instability caused by large flow or change speed.

[0110] The above changes take 90° as a cycle. In one cycle, the rotating shaft 336 driven by the driving member 337 rotates continuously, presenting a "slow closing" stage, a "slow opening" stage, and a "low-pressure filling, high-pressure exchange" stage in sequence.

[0111] In some embodiments, the outer wall of the first piston 338 and the outer wall of the second piston 339 are both in contact with the inner wall of the cylinder 331 .

[0112] In some embodiments, the outer wall of the first piston 338 is pressed against the inner wall of the cylinder 331, so that the low-pressure water outlet 333, the first conversion port 334 and the first radial water channel 3383 on the first piston 338 are more tightly connected, and the outer wall of the second piston 339 is also pressed against the inner wall of the cylinder 331, so that the high-pressure water inlet 332, the second conversion port 335 and the second radial water channel 3393 on the second piston 339 are more tightly connected, thereby reducing the possibility of water leaking into the cylinder 331 when connected and improving stability.

[0113] In some embodiments, the two first axial water channels 3382 and the two second axial water channels 3392 are both symmetrically arranged about the axis of rotation shaft 336 .

[0114] In some embodiments, the two first axial water channels 3382 and the two second axial water channels 3392 are symmetrically arranged about the axis of the rotating shaft 336. The symmetrically arranged first axial water channels 3382 and second axial water channels 3392 ensure the stability of the flow of high-pressure concentrated water and low-pressure concentrated water during the rotation of the rotating shaft 336.

[0115] In some embodiments, the first flow channel 3384 and the second flow channel 3394 are respectively located on both sides of the rotation axis 336 .

[0116] In some embodiments, the first circulation water channel 3384 and the second circulation water channel 3394 are respectively located on both sides of the rotating shaft 336. When the first circulation water channel 3384 is connected to the low-pressure water outlet 333, the second circulation water channel 3394 is separated from the high-pressure water inlet 332 to avoid the situation where the high-pressure water inlet 332 is directly connected to the low-pressure water outlet 333.

[0117] In some embodiments, the four first radial water channels 3383 are evenly spaced apart along the circumference of the first piston 338 , and the four second radial water channels 3393 are evenly spaced apart along the circumference of the second piston 339 .

[0118] In some embodiments, the four first radial water channels 3383 are evenly arranged along the circumference of the first piston 338, and the four second radial water channels 3393 are evenly arranged along the circumference of the second piston 339. Every time the rotating shaft 336 rotates 90°, the first radial water channel 3383 can be connected to the low-pressure water outlet 333 and the first conversion port 334, and the second radial water channel 3393 can be connected to the high-pressure water inlet 332 and the second conversion port 335.

[0119] In some embodiments, a plurality of buffer grooves 3310 are provided on the first piston 338 and the second piston 339. The buffer grooves 3310 are used to alleviate the vibration caused by flow changes when the liquid flows through the first radial water channel 3383 and the second radial water channel 3393. The plurality of buffer grooves 3310 are respectively located at the openings of the first radial water channel 3383 and the second radial water channel 3393.

[0120] In some embodiments, a plurality of buffer grooves 3310 are provided on the outer walls of the first piston 338 and the second piston 339. The buffer grooves 3310 are arc-shaped. Every two buffer grooves 3310 on the first piston 338 correspond to an opening of a first radial water channel 3383. Every two buffer grooves 3310 on the second piston 339 correspond to an opening of a second radial water channel 3393. The buffer grooves 3310 are used to alleviate vibrations caused by flow changes when liquid flows through the first radial water channel 3383 and the second radial water channel 3393. In the process of gradually closing the high-pressure water inlet 332 and the low-pressure water outlet 333, water can continue to flow through the buffer grooves 3310, thereby slowing down the speed of change of water flow and further improving the overall stability.

[0121] In some embodiments, two buffer grooves 3310 are provided at each opening, and the two buffer grooves 3310 are evenly spaced and arranged along the circumference of the opening.

[0122] In some embodiments, two buffer grooves 3310 are provided at each opening, and the two buffer grooves 3310 are evenly arranged along the circumference of the opening. The two buffer grooves 3310 are arranged at the periphery of the opening along the circumference of the first piston 338 or the second piston 339, and the two buffer grooves 3310 are symmetrically arranged about the opening.

[0123] In an optimal embodiment of an energy cycle control system disclosed in the present application, it includes a raw water tank 1, which has a first water tank outlet and a second water tank outlet for storing and outputting low-pressure desulfurization wastewater.

[0124] The first water tank outlet of the raw water tank 1 is connected to a first water tank outlet pipe, and the other end of the first water tank outlet pipe is provided with a reverse osmosis device 2, which is provided with a first water inlet 21, a first water outlet 22 and a second water outlet 23, and the first water tank outlet pipe is connected to the first water inlet 21. The reverse osmosis device 2 is used to concentrate the desulfurization wastewater to generate produced water and high-pressure concentrated water, the produced water is discharged through the first water outlet 22, and the high-pressure concentrated water is discharged through the second water outlet 23.

[0125] The outlet of the second water pool of the raw water pool 1 is connected to a second water pool outlet pipe, and the other end of the second water pool outlet pipe is provided with an energy conversion device 3, and the energy conversion device 3 is connected to a high-pressure concentrated water inlet pipe and a high-pressure water outlet pipe, and the high-pressure water outlet pipe is connected to the first water pool outlet pipe and thus connected to the first water inlet 21 of the reverse osmosis device 2, and the high-pressure concentrated water inlet pipe is connected to the second water outlet 23 of the reverse osmosis device 2. The energy conversion device 3 regulates the pressure of the high-pressure concentrated water discharged from the second water outlet 23 and the low-pressure desulfurized wastewater discharged from the outlet of the second water pool, so that the pressure of the low-pressure desulfurized wastewater increases to become high-pressure desulfurized wastewater and flows into the reverse osmosis device 2 through the first water inlet 21, and at the same time, the high-pressure concentrated water is depressurized to become low-pressure concentrated water and discharged.

[0126] The low-pressure desulfurization wastewater in the raw water tank 1 flows out from the outlet of the first water tank and enters the reverse osmosis device 2 through the first water inlet 21 for concentration treatment. The desulfurization wastewater after concentration treatment generates product water and high-pressure concentrated water. The product water is discharged from the first water outlet 22 of the reverse osmosis device 2 and enters other processes, while the high-pressure concentrated water is discharged from the second water outlet 23 of the reverse osmosis device 2 and enters the energy conversion device 3. At the same time, the low-pressure desulfurization wastewater in the raw water tank 1 enters the energy conversion device 3 through the outlet of the second water tank.

[0127] The energy conversion device 3 includes a first hydraulic cylinder 31 , a second hydraulic cylinder 32 and a fluid switcher 33 .

[0128] The first hydraulic cylinder 31 includes a first cylinder body and a first hydraulic piston 314 slidably disposed in the first cylinder body. The first hydraulic piston 314 divides the inner cavity of the first cylinder body into a first left sub-cavity and a first right sub-cavity. A first pressure regulating water port 311 and a second pressure regulating water port 312 are disposed on the outer wall of the first left sub-cavity. A third pressure regulating water port 313 is disposed on the outer wall of the first right sub-cavity. Check valves are disposed at the first pressure regulating water port 311 and the second pressure regulating water port 312 to prevent backflow.

[0129] The second hydraulic cylinder 32 includes a second cylinder body and a second hydraulic piston 324 slidably arranged in the second cylinder body. The second hydraulic piston 324 divides the inner cavity of the second cylinder body into a second left sub-cavity and a second right sub-cavity. A fourth pressure regulating water port 321 and a fifth pressure regulating water port 322 are arranged on the outer wall of the second left sub-cavity. A sixth pressure regulating water port 323 is arranged on the outer wall of the second right sub-cavity. Check valves are arranged at the second pressure regulating water port 312 and the second pressure regulating water port 313 to prevent backflow.

[0130] A fluid switch 33 is connected to the same side of the first hydraulic cylinder 31 and the second hydraulic cylinder 32 , and a drain pipe 34 is connected to the fluid switch 33 .

[0131] The first pressure regulating water port 311 and the fourth pressure regulating water port 321 are connected to the high-pressure water outlet pipe, the second pressure regulating water port 312 and the fifth pressure regulating water port 322 are connected to the second water tank outlet pipe, and the third pressure regulating water port 313 and the sixth pressure regulating water port 323 are connected to the fluid switcher 33.

[0132] The fluid switcher 33 includes a cylinder 331, which is hollow and has openings at both ends to form a long cylindrical shape. The hollow interior of the cylinder 331 forms an inner cavity. A first conversion port 334 and a second conversion port 335 are provided at the upper portion of the cylinder 331, and a high-pressure water inlet 332 and a low-pressure water outlet 333 are provided at the lower portion of the cylinder 331. The first conversion port 334, the second conversion port 335, the high-pressure water inlet 332, and the low-pressure water outlet 333 are all connected to the inner cavity. The first conversion port 334 and the low-pressure water outlet 333 are symmetrical about the axis of the cylinder 331, and the second conversion port 335 and the high-pressure water inlet 332 are symmetrical about the axis of the cylinder 331.

[0133] A rotating shaft 336 is rotatably disposed in the cylinder 331 , and the rotating shaft 336 is hollow inside to form an inner flow channel 3361 .

[0134] A driving member 337 is disposed outside the cylinder 331 . The driving member 337 is connected to one end of the rotating shaft 336 . Driven by the driving member 337 , the rotating shaft 336 rotates in the circumferential direction.

[0135] The outer coaxial sleeve of the rotating shaft 336 is provided with a first piston 338 and a second piston 339, and the first piston 338 and the second piston 339 are axially spaced apart along the rotating shaft 336. The first piston 338 and the second piston 339 are both located in the inner cavity, and the outer wall of the first piston 338 is pressed against the inner wall of the cylinder 331, so that the connection between the low-pressure water outlet 333, the first conversion port 334 and the first radial water channel 3383 on the first piston 338 is tighter, and the outer wall of the second piston 339 is also pressed against the inner wall of the cylinder 331.

[0136] The first piston 338 is provided with a first flow channel opening 3381 connected to the low-pressure water outlet 333, and the second piston 339 is provided with a second flow channel opening 3391 connected to the high-pressure water inlet 332. As the rotating shaft 336 rotates, the first flow channel opening 3381 is staggered with the low-pressure water outlet 333, and the second flow channel opening 3391 is staggered with the high-pressure water inlet 332, so that the water flow rate of the low-pressure water outlet 333 and the high-pressure water inlet 332 gradually decreases.

[0137] A first connecting hole 3362 and a second connecting hole 3363 are provided on the outer wall of the rotating shaft 336. The first connecting hole 3362 and the second connecting hole 3363 are both connected to the inner flow channel 3361. The first connecting hole 3362 and the second connecting hole 3363 are respectively located at the two ends of the rotating shaft 336 and are staggered up and down. The first connecting hole 3362 is covered by the first piston 338, and the second connecting hole 3363 is covered by the second piston 339.

[0138] The first piston 338 is provided with two first axial water channels 3382, four first radial water channels 3383 and one first circulation water channel 3384. The two first axial water channels 3382 are not connected to each other. The first axial water channel 3382 is located on the side of the first piston 338 away from the second piston 339. The two first axial water channels 3382 are symmetrically arranged about the axis of the rotating shaft 336. The length direction of the first axial water channel 3382 is consistent with the axial direction of the first piston 338. The two first axial water channels 3382 are connected to two of the first radial water channels 3383.

[0139] The first flow channel 3381 includes four first radial water channels 3383 , the four first radial water channels 3383 are not connected to each other, the length direction of the first radial water channels 3383 is consistent with the radial direction of the first piston 338 , and one of the first radial water channels 3383 is connected to the first communicating hole 3362 .

[0140] The length direction of the first circulation water channel 3384 is consistent with the axial direction of the first piston 338 , the first circulation water channel 3384 is connected to one of the first radial water channels 3383 , the first circulation water channel 3384 is not connected to the two first axial water channels 3382 , and the first circulation water channel 3384 is located on the side of the first piston 338 facing the second piston 339 .

[0141] The second piston 339 is provided with two second axial water channels 3392, four second radial water channels 3393 and one second circulation water channel 3394. The two second axial water channels 3392 are not connected to each other. The second axial water channel 3392 is located on the side of the second piston 339 away from the first piston 338. The two second axial water channels 3392 are symmetrically arranged about the axis of the rotating shaft 336. The length direction of the second axial water channel 3392 is consistent with the axial direction of the second piston 339. The two second axial water channels 3392 are connected to two of the second radial water channels 3393.

[0142] The second flow channel opening 3391 includes four second radial water channels 3393 , the four second radial water channels 3393 are not connected to each other, the length direction of the second radial water channels 3393 is consistent with the radial direction of the second piston 339 , and one of the second radial water channels 3393 is connected to the second connecting hole 3363 .

[0143] The length direction of the second circulation water channel 3394 is consistent with the axial direction of the second piston 339. The second circulation water channel 3394 is connected to one of the second radial water channels 3393. The second circulation water channel 3394 is not connected to the two second axial water channels 3392. The second circulation water channel 3394 is located on the side of the second piston 339 facing the first piston 338. The first circulation water channel 3384 and the second circulation water channel 3394 are respectively located on both sides of the rotating shaft 336.

[0144] The four first radial water channels 3383 are evenly arranged along the circumference of the first piston 338, and the four second radial water channels 3393 are evenly arranged along the circumference of the second piston 339. Every time the rotating shaft 336 rotates 90°, the first radial water channel 3383 can be connected to the low-pressure water outlet 333 and the first conversion port 334, and the second radial water channel 3393 can be connected to the high-pressure water inlet 332 and the second conversion port 335.

[0145] A plurality of buffer grooves 3310 are provided on the outer side walls of the first piston 338 and the second piston 339. The buffer grooves 3310 are arc-shaped. Every two buffer grooves 3310 on the first piston 338 correspond to an opening of the first radial water channel 3383. Every two buffer grooves 3310 on the second piston 339 correspond to an opening of the second radial water channel 3393. Two buffer grooves 3310 are provided at each opening. The two buffer grooves 3310 are evenly spaced along the circumference of the opening. Both buffer grooves 3310 are arranged at the periphery of the opening along the circumference of the first piston 338 or the second piston 339. The two buffer grooves 3310 are symmetrically arranged about the opening.

[0146] When the rotating shaft 336 is in the initial state, the high-pressure water inlet 332 is connected to the first conversion port 334 through the second radial water channel 3393, the second communication hole 3363, the inner flow channel 3361, the first communication hole 3362, and the first radial water channel 3383, and the low-pressure water outlet 333 is connected to the second conversion port 335 through the second radial water channel 3393, the second circulation water channel 3394, the first circulation water channel 3384, and the first radial water channel 3383. As the rotating shaft 336 rotates, the first conversion port 334 is gradually separated from the first radial water channel 3383, and the second conversion port 335 is gradually separated from the second radial water channel 3393.

[0147] After the rotating shaft 336 rotates 90° counterclockwise, the high-pressure water inlet 332 is connected to the second conversion port 335 through the second axial water channel 3392 and the second radial water channel 3393 , and the low-pressure water outlet 333 is connected to the first conversion port 334 through the first axial water channel 3382 and the first radial water channel 3383 .

[0148] After the rotating shaft 336 rotates 180° counterclockwise, the high-pressure water inlet 332 is connected to the first conversion port 334 through the second radial water channel 3393, the second circulation water channel 3394, the first circulation water channel 3384, and the first radial water channel 3383, and the low-pressure water outlet 333 is connected to the second conversion port 335 through the first radial water channel 3383, the first connecting hole 3362, the inner flow channel 3361, the second connecting hole 3363, and the second radial water channel 3393.

[0149] After the rotating shaft 336 rotates 270° counterclockwise, the high-pressure water inlet 332 is connected to the second conversion port 335 through the second axial water channel 3392 and the second radial water channel 3393 , and the low-pressure water outlet 333 is connected to the first conversion port 334 through the first axial water channel 3382 and the first radial water channel 3383 .

[0150] After the rotating shaft 336 rotates 360° counterclockwise, the connection state returns to the initial position.

[0151] End caps are provided at both ends of the cylinder 331. The end caps cover the openings at both ends of the cylinder 331 and play a role in fixing the position of the rotating shaft 336. The two ends of the rotating shaft 336 pass through the axis of the end caps. Bearings are sleeved at both ends of the rotating shaft 336. A boss that matches the bearing is provided on the rotating shaft 336. The bearing abuts against the inner surface of the end cap. The rotating shaft 336 is coaxially arranged with the bearing and the end cap. A coupling is provided on the outer surface of the end cap. One end of the rotating shaft 336 passes through the end cap and is connected to the coupling. The coupling can be a tire coupling, and the driving member 337 can be a gear reduction motor.

[0152] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0153] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. An energy cycle control system, characterized in that: include: A raw water tank (1) having a first water tank outlet and a second water tank outlet; A reverse osmosis device (2) having a first water inlet (21), a first water outlet (22) and a second water outlet (23), wherein the first water inlet (21) is connected to the first water pool outlet, and the reverse osmosis device (2) is used to concentrate desulfurization wastewater to generate product water and high-pressure concentrated water, wherein the product water is discharged through the first water outlet (22) and the high-pressure concentrated water is discharged through the second water outlet (23); The energy conversion device (3) is respectively connected to the first water inlet (21), the second water pool outlet, and the second water outlet (23) to adjust the pressure of the high-pressure concentrated water discharged from the second water outlet (23) and the low-pressure wastewater discharged from the second water pool outlet, so that the pressure of the low-pressure wastewater is increased to become high-pressure wastewater and flows into the reverse osmosis device (2) through the first water inlet (21). At the same time, the high-pressure concentrated water is depressurized to become low-pressure concentrated water and is discharged.

2. The energy cycle control system according to claim 1, characterized in that: A high-pressure pump (4) is arranged between the first water pool outlet and the first water inlet (21), a booster pump (5) is arranged between the energy conversion device (3) and the first water inlet (21), and the booster pump (5) is located between the high-pressure pump (4) and the first water inlet (21).

3. The energy cycle control system according to claim 1, characterized in that: The energy conversion device (3) comprises: A first hydraulic cylinder (31) having a first pressure regulating water port (311), a second pressure regulating water port (312) and a third pressure regulating water port (313), wherein the first pressure regulating water port (311) is connected to the first water inlet (21), the second pressure regulating water port (312) is connected to the second water pool outlet, and the third pressure regulating water port (313) is connected to the second water outlet (23); The second hydraulic cylinder (32) has a fourth pressure regulating water port (321), a fifth pressure regulating water port (322) and a sixth pressure regulating water port (323), wherein the fourth pressure regulating water port (321) is connected to the first water inlet (21), the fifth pressure regulating water port (322) is connected to the second water pool outlet, and the sixth pressure regulating water port (323) is connected to the second water outlet (23); a fluid switch (33), the fluid switch (33) being connected to the second water outlet (23), the third pressure regulating water outlet (313) being connected to the second water outlet (23) through the fluid switch (33), the sixth pressure regulating water outlet (323) being connected to the second water outlet (23) through the fluid switch (33), and the fluid switch (33) being connected to a drain pipe (34); The first hydraulic cylinder (31) and the second hydraulic cylinder (32) are both used to adjust the pressure of the inflowing high-pressure concentrated water and low-pressure desulfurized wastewater. The low-pressure desulfurized wastewater is pressurized to become high-pressure desulfurized wastewater and is sent to the reverse osmosis device (2). The high-pressure concentrated water is depressurized to become low-pressure concentrated water and is discharged.

4. The energy cycle control system according to claim 3, characterized in that: The fluid switch (33) comprises: A cylinder (331), wherein the cylinder (331) is hollow and has openings at both ends, and the cylinder (331) is provided with a high-pressure water inlet (332), a low-pressure water outlet (333), a first conversion port (334), and a second conversion port (335); A rotating shaft (336), the rotating shaft (336) being rotatably disposed in the valve body cylinder (331); A driving member (337) connected to the rotating shaft (336) to drive the rotating shaft (336) to rotate; During the rotation of the rotating shaft (336), the high-pressure water inlet (332) is connected to or disconnected from the second conversion port (335); when the high-pressure water inlet (332) is connected to the second conversion port (335), the low-pressure water outlet (333) is connected to the first conversion port (334); During the rotation of the rotating shaft (336), the high-pressure water inlet (332) is connected to or disconnected from the first conversion port (334); when the high-pressure water inlet (332) is connected to the first conversion port (334), the low-pressure water outlet (333) is connected to the second conversion port (335); Furthermore, during the rotation of the rotating shaft (336), the water passage diameters of the high-pressure water inlet (332), the low-pressure water outlet (333), the first conversion port (334) and the second conversion port (335) change.

5. The energy cycle control system according to claim 4, characterized in that: A first piston (338) and a second piston (339) are coaxially sleeved on the rotating shaft (336), and the first piston (338) and the second piston (339) are axially spaced apart from each other along the rotating shaft (336); The interior of the rotating shaft (336) is hollow to form an inner flow channel (3361), and a first communicating hole (3362) and a second communicating hole (3363) are opened on the rotating shaft (336), the first communicating hole (3362) is covered by the first piston (338), and the second communicating hole (3363) is covered by the second piston (339), and the first communicating hole (3362) and the second communicating hole (3363) are both in communication with the inner flow channel (3361); The first piston (338) is provided with two first axial water channels (3382), four first radial water channels (3383) and one first circulation water channel (3384); the two first axial water channels (3382) are not connected to each other; the four first radial water channels (3383) are not connected to each other; the two first axial water channels (3382) are respectively connected to two of the first radial water channels (3383); the first circulation water channel (3384) is connected to one of the remaining first radial water channels (3383); the first communicating hole (3362) is connected to another of the remaining first radial water channels (3383); the first axial water channel (3382) and the first circulation water channel (3384) are not connected to each other; the opening of the first axial water channel (3382) faces away from the second piston (339); and the opening of the first circulation water channel (3384) faces toward the second piston (339); The second piston (339) is provided with two second axial water channels (3392), four second radial water channels (3393) and one second circulation water channel (3394); the two second axial water channels (3392) are not connected to each other; the four second radial water channels (3393) are not connected to each other; the two second axial water channels (3392) are respectively connected to two of the second radial water channels (3393); the second circulation water channel (3394) is connected to one of the remaining second radial water channels (3393); the second communication hole (3363) is connected to another of the remaining second radial water channels (3393); the second axial water channel (3392) and the second circulation water channel (3394) are not connected to each other; the opening of the second axial water channel (3392) faces away from the first piston (338); and the opening of the second circulation water channel (3394) faces toward the first piston (338); When the rotating shaft (336) is in an initial state, the high-pressure water inlet (332) is in communication with the second radial water channel (3393), the first conversion port (334) is in communication with the first radial water channel (3383), the second radial water channel (3393) is in communication with the first radial water channel (3383) through the inner flow channel (3361), at this time, the low-pressure water outlet (333) is in communication with the first radial water channel (3383), the second conversion port (335) is in communication with the second radial water channel (3393), and the first radial water channel (3383) is in communication with the second radial water channel (3393) through the second circulation water channel (3394) and the first circulation water channel (3384); The rotation angle of the rotating shaft (336) is adjusted, and when the high-pressure water inlet (332) is connected to the second conversion port (335) through the second axial water channel (3392) and the second radial water channel (3393), the low-pressure water outlet (333) is connected to the first conversion port (334) through the first axial water channel (3382) and the first radial water channel (3383); By adjusting the rotation angle of the rotating shaft (336), when the high-pressure water inlet (332) is connected to the first conversion port (334) through the second radial water channel (3393), the second circulation water channel (3394), the first circulation water channel (3384), and the first radial water channel (3383), the low-pressure water outlet (333) is connected to the second conversion port (335) through the first radial water channel (3383), the first connecting hole (3362), the inner flow channel (3361), the second connecting hole (3363), and the second radial water channel (3393).

6. The energy cycle control system according to claim 5, characterized in that: The two first axial water channels (3382) and the two second axial water channels (3392) are both symmetrically arranged about the axis of the rotating shaft (336).

7. The energy cycle control system according to claim 5, characterized in that: The first circulation water channel (3384) and the second circulation water channel (3394) are respectively located on both sides of the rotating shaft (336).

8. The energy cycle control system according to claim 5, characterized in that: The four first radial water channels (3383) are evenly spaced apart along the circumference of the first piston (338), and the four second radial water channels (3393) are evenly spaced apart along the circumference of the second piston (339).

9. The energy cycle control system according to claim 5, characterized in that: A plurality of buffer grooves (3310) are provided on the first piston (338) and the second piston (339), and the plurality of buffer grooves (3310) are respectively located at the openings of the first radial water channel (3383) and the second radial water channel (3393).

10. The energy cycle control system according to claim 9, characterized in that: Two buffer grooves (3310) are provided at each opening, and the two buffer grooves (3310) are evenly spaced and arranged along the circumference of the opening.

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