Low consumption type seawater desalination energy recovery device

Abstract

The present application relates to the technical field of seawater desalination treatment, and particularly relates to a low-consumption seawater desalination energy recovery device, a recovery seat is provided with a pressurizing cavity and a salinity detection cavity; the recovery seat is further provided with an overflow device on one side of the pressurizing cavity; the overflow device is provided with a pressure regulating piece for regulating the opening pressure of the overflow device; a float is movably arranged in the salinity detection cavity; a driving structure is arranged at the bottom end of the float after the bottom end of the float movably and sealingly penetrates out of the salinity detection cavity; the recovery seat is provided with a lever transmission structure; two ends of the lever transmission structure are movably connected with the driving structure and the pressure regulating piece respectively, and the force arm between the lever transmission structure and the driving structure is greater than the force arm between the lever transmission structure and the pressure regulating piece, so as to amplify the acting force on the pressure regulating piece, thereby driving the pressure regulating piece to regulate the opening pressure of the overflow device. The present application realizes dynamic adaptation of the membrane inlet pressure requirement of a reverse osmosis filter core, does not need manual intervention, and solves the problem of poor water production effect or filter core damage caused by pressure mismatch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seawater desalination treatment, in particular to a low-consumption seawater desalination energy recovery device. BACKGROUND

[0002] In mobile scenarios such as ships, the key problem faced by seawater desalination systems is that the salinity of seawater fluctuates greatly - during the navigation process of the ship, it may enter the high-salinity seawater area of the open sea from the low-salinity seawater area near the shore (such as an estuary or a bay), or cross different salinity gradient sea areas due to changes in the route, resulting in a significant difference in the required reverse osmosis membrane pressure difference. The seawater pressurized by the existing energy recovery device still needs to be pressurized twice to the membrane pressure, but because the output pressure of the energy recovery device fluctuates with the salinity of seawater and has no dynamic adjustment capability, the pressurizing pump needs to be frequently adjusted in power: when the salinity increases, the output pressure of the device is insufficient, and the pressurizing pump needs to be greatly powered to compensate for the pressure, resulting in increased energy consumption and overheating and wear of the pump body; when the salinity decreases, the output pressure of the device is too high, and the pressurizing pump needs to be powered down to avoid overpressure problems. SUMMARY

[0003] The purpose of the present application is to overcome the above-mentioned shortcomings, provide a low-consumption seawater desalination energy recovery device, which can dynamically adjust the energy recovery pressure according to the salinity of seawater, adapt to the reverse osmosis membrane pressure requirement in different scenarios, and at the same time, take into account the seawater desalination energy recovery device with high-efficiency energy recovery and system stability, to solve the problems of high energy consumption, filter core damage, and unstable water production caused by seawater salinity fluctuation in mobile scenarios such as ships.

[0004] To achieve the above-mentioned purpose, the specific scheme of the present application is as follows:

[0005] A low-consumption seawater desalination energy recovery device, comprising a recovery seat; the recovery seat is provided with a pressurizing cavity and a salinity detection cavity communicating with the pressurizing cavity on one side of the pressurizing cavity; the recovery seat is further provided with an overflow device for discharging the raw water pressurized in the pressurizing cavity out of the pressurizing cavity on one side of the pressurizing cavity; the overflow device is provided with a pressure regulating piece for regulating the opening pressure of the overflow device; a float is movably arranged in the salinity detection cavity; the bottom end of the float is movably sealed out of the salinity detection cavity and is provided with a driving structure;

[0006] The recovery seat is provided with a lever transmission structure between the driving structure and the pressure regulating piece; the two ends of the lever transmission structure are movably connected with the driving structure and the pressure regulating piece, respectively, and the force arm between the lever transmission structure and the driving structure is greater than the force arm between the lever transmission structure and the pressure regulating piece, so as to amplify the acting force on the pressure regulating piece, thereby driving the pressure regulating piece to regulate the opening pressure of the overflow device.

[0007] Further, the driving structure is a driving block; the driving block is provided with a first driving slope; the driving block is movably connected with the lever transmission structure through the first driving slope; the adjusting member is provided with a second driving slope; the adjusting member is movably connected with the lever transmission structure through the second driving slope.

[0008] Further, the lever transmission structure comprises a lever arm hingedly connected with the recovery seat, and a first wedge block and a second wedge block movably arranged on the recovery seat; the first wedge block is movably hingedly connected with one end of the lever arm; the second wedge block is movably hingedly connected with the other end of the lever arm; the distance between the first wedge block and the fulcrum of the lever arm is greater than the distance between the second wedge block and the fulcrum of the lever arm; the second wedge block is movably connected with the second driving slope of the adjusting member.

[0009] The lever transmission structure further comprises a third wedge block horizontally slidably arranged on the recovery seat; the third wedge block is movably connected with the first driving slope of the driving block and the first wedge block at two ends, respectively.

[0010] Further, the first wedge block is provided with a third driving slope; one end of the third wedge block is provided with a fourth driving slope movably connected with the first driving slope, and the other end of the third wedge block is provided with a fifth driving slope movably connected with the third driving slope; the second wedge block is provided with a sixth driving slope movably connected with the second driving slope.

[0011] Further, the overflow device comprises an overflow valve body; the overflow valve body is provided with an overflow inlet for communicating with the pressurizing cavity; the overflow inlet is provided with an overflow valve core for opening and closing the overflow inlet; one side of the overflow valve body is provided with an overflow outlet for discharging the pressurized raw water; the overflow valve core is connected with the adjusting member through a pressure regulating spring.

[0012] Further, the adjusting member comprises an adjusting plate movably arranged in the overflow valve body, a rod body fixedly connected with one end of the adjusting plate, and an adjusting block connected with the other end of the rod body and located outside the overflow valve body; the pressure regulating spring is connected between the adjusting plate and the overflow valve core; the rod body movably penetrates the overflow valve body; the adjusting block is provided with the second driving slope.

[0013] Further, the recovery seat is provided with a storage cavity for storing the pressurized raw water on one side of the pressurizing cavity; the storage cavity is in communication with the overflow outlet.

[0014] Further, the low-consumption seawater desalination energy recovery device further comprises a reverse osmosis filter core arranged in the recovery seat and an energy recovery driving mechanism.

[0015] The raw water inlet end of the reverse osmosis filter core is connected with a pressurizing pump; the raw water inlet end of the pressurizing pump is in one-way communication with the storage cavity through a pressurizing water outlet pipeline; the energy recovery driving mechanism comprises a recovery power member and a piston member; the recovery power member is connected with the wastewater discharge end of the reverse osmosis filter core through a high-pressure wastewater outlet pipeline, so as to drive the piston member to reciprocate under the energy of the wastewater, thereby pressurizing the raw water in the pressurizing cavity; the plug part of the piston member is movably arranged in the pressurizing cavity; the plug rod of the piston member is connected with the output end of the recovery power member.

[0016] Further, the recovery power member comprises a recovery bin and a recovery rotor rotatably arranged in the recovery bin; one end of the shaft body of the recovery rotor extends out of the recovery bin and is provided with a swing rod; the distal end of the swing rod is hingedly connected with a first connecting rod; one end of the first connecting rod away from the swing rod is hingedly connected with a driving sliding block; the driving sliding block is slidingly arranged on the recovery seat; the driving sliding block is hingedly connected with a second connecting rod; one end of the second connecting rod away from the driving sliding block is hingedly connected with the plug rod of the piston member.

[0017] Further, one side of the recovery bin extends an installation plate; the installation plate is fixedly connected to the recovery seat; the installation plate is provided with a limiting strip hole; a limiting shaft is protrudingly arranged at the bottom of the driving sliding block; the limiting shaft is movably embedded in the limiting strip hole; the second connecting rod is hingedly connected to the limiting shaft.

[0018] The beneficial effects of the present application are: the present application detects the salinity of seawater through the buoyancy received by the buoy, and adjusts the opening pressure of the overflow device according to the salinity of seawater through the amplification of the lever transmission structure, so as to realize dynamic adaptation of the membrane inlet pressure requirement of the reverse osmosis filter core, without manual intervention, and solve the problem of poor water production effect or filter core damage caused by pressure mismatch. The whole opening pressure adjustment is realized through mechanical structure, so the failure rate is low, the operation is automatic, the unmanned operation demand of the ship is met, and the system reliability and convenience are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure schematic view of a low-consumption seawater desalination energy recovery device provided by the embodiment of the present application;

[0020] Figure 2 is a structure schematic view of another view of the low-consumption seawater desalination energy recovery device provided by the embodiment of the present application;

[0021] Figure 3 is a cross-sectional schematic view of the low-consumption seawater desalination energy recovery device provided by the embodiment of the present application;

[0022] Figure 4 is a cross-sectional schematic view of another view of the low-consumption seawater desalination energy recovery device provided by the embodiment of the present application;

[0023] Figure 5 is a schematic diagram of the cooperation of the float, lever transmission structure and overflow device when the salinity of seawater increases;

[0024] Figure 6 is a schematic diagram of the cooperation of the float, lever transmission structure and overflow device when the salinity of seawater decreases;

[0025] Figure 7 is a schematic diagram of the cross section of the overflow device provided by the embodiment of the present application;

[0026] Figure 8 is a schematic diagram of the cross section of the energy recovery driving mechanism provided by the embodiment of the present application;

[0027] Legend: 1, recovery seat; 11, pressurizing cavity; 12, salinity detection cavity; 13, storage cavity; 2, overflow device; 21, overflow valve body; 211, overflow inlet; 212, overflow outlet; 22, overflow valve core; 23, pressure regulating spring; 241, adjusting plate; 242, rod body; 243, adjusting block; 244, second driving slope; 3, float; 31, driving block; 32, first driving slope; 41, lever arm; 42, first wedge-shaped block; 421, third driving slope; 43, second wedge-shaped block; 431, sixth driving slope; 44, third wedge-shaped block; 441, fourth driving slope; 442, fifth driving slope; 5, reverse osmosis filter core; 6, energy recovery driving mechanism; 611, recovery bin; 6111, mounting plate; 6112, limiting strip hole; 612, recovery rotor; 613, swing rod; 62, first connecting rod; 63, driving sliding block; 631, limiting shaft; 64, second connecting rod; 65, piston piece; 7, pressurizing pump. DETAILED DESCRIPTION

[0028] The present application will be further described in detail below in conjunction with the drawings and specific embodiments, which are not intended to limit the scope of the present application.

[0029] As Figures 1 to 8As shown, the low-consumption seawater desalination energy recovery device comprises a recovery seat 1, a reverse osmosis filter core 5 arranged at the top of the recovery seat 1, and an energy recovery driving mechanism 6 arranged on the recovery seat 1; a pressurizing cavity 11 for pressurizing treatment of raw water (normal pressure seawater) is arranged in the recovery seat 1, and a salinity detection cavity 12 communicating with the pressurizing cavity 11 is arranged on one side of the pressurizing cavity 11; the pressurizing cavity 11 and the salinity detection cavity 12 are connected with a normal pressure raw water inlet pipeline, the normal pressure raw water inlet pipeline is unidirectionally communicated with the pressurizing cavity 11, the salinity detection cavity 12 is unidirectionally communicated with the pressurizing cavity 11, and a one-way valve piece or a one-way valve (not shown in the figure) can be arranged to achieve the unidirectional communication; a float 3 is movably arranged in the salinity detection cavity 12; a pressurizing pump 7 is connected with a raw water inlet end of the reverse osmosis filter core 5; the recovery seat 1 is further provided with an overflow device 2 on one side of the pressurizing cavity 11 for discharging the pressurized raw water in the pressurizing cavity 11; a storage cavity 13 for storing the pressurized raw water is arranged on one side of the pressurizing cavity 11 of the recovery seat 1; the storage cavity 13 is communicated with an overflow outlet 212 of the overflow device 2; the raw water inlet end of the pressurizing pump 7 is unidirectionally communicated with the storage cavity 13 through a pressurized water outlet pipeline; the energy recovery driving mechanism 6 is connected with a waste water outlet end of the reverse osmosis filter core 5 through a high-pressure waste water outlet pipeline, so as to realize recovery of the energy of the high-pressure waste water.

[0030] In actual use, the waste water outlet end of the reverse osmosis filter core 5 discharges high-pressure waste water to the energy recovery driving mechanism 6 through the high-pressure waste water outlet pipeline, the energy recovery driving mechanism 6 recovers the energy of the high-pressure waste water, and pressurizes the normal pressure raw water in the pressurizing cavity 11 through the recovered energy; when the energy recovery driving mechanism 6 increases the effective volume of the pressurizing cavity 11, the normal pressure raw water enters the pressurizing cavity 11 through the normal pressure raw water inlet pipeline, and at the same time, the normal pressure raw water enters the salinity detection cavity 12 to generate buoyancy on the float 3, and the normal pressure raw water with different salinity generates different buoyancy on the float 3; when the energy recovery driving mechanism 6 reduces the effective volume of the pressurizing cavity 11, the pressure in the pressurizing cavity 11 increases, so as to achieve the effect of pressurizing the normal pressure raw water in the pressurizing cavity 11; when the pressure in the pressurizing cavity 11 reaches the opening pressure of the overflow device 2, the overflow device 2 is opened, so that the pressurized raw water in the pressurizing cavity 11 enters the storage cavity 13 through the overflow outlet 212 of the overflow device 2, and then enters the pressurizing pump 7 through the storage cavity 13 and the pressurized water outlet pipeline; the pressurizing pump 7 pressurizes the pressurized raw water for the second time, and the pressurizing pump 7 supplements the seawater pressure to the reverse osmosis inlet membrane pressure corresponding to the current salinity (for example, the preliminary pressurization pressure is 6.5 MPa, and the pressurizing pump 7 supplements 0.5 MPa to 7.0 MPa); then the seawater is transported to the reverse osmosis filter core 5 for desalination treatment to produce fresh water; the high-pressure waste water generated by the reverse osmosis filter core 5 is discharged into the energy recovery driving mechanism 6 through the high-pressure waste water outlet pipeline for energy recovery, so as to realize continuous recovery and treatment of the waste water energy.

[0031] The embodiment buffers and stabilizes the pressurized raw water by arranging a storage cavity 13 in the recovery seat 1, reduces pressure impact, is beneficial to prolong the service life of the filter element, and reduces the maintenance cost.

[0032] As shown in Figures 2 to 5 , the low-consumption seawater desalination energy recovery device further comprises a pressure regulating piece for adjusting the opening pressure of the overflow device 2; the bottom end of the float 3 is movably sealed out of the salinity detection cavity 12 and is provided with a driving structure; the recovery seat 1 is provided with a lever transmission structure between the driving structure and the pressure regulating piece; the two ends of the lever transmission structure are movably connected with the driving structure and the pressure regulating piece, respectively, and the force arm between the lever transmission structure and the driving structure is greater than the force arm between the lever transmission structure and the pressure regulating piece, so as to amplify the force acting on the pressure regulating piece, thereby driving the pressure regulating piece to adjust the opening pressure of the overflow device 2.

[0033] Specifically, as shown in Figure 5 , if the salinity of the normal-pressure seawater increases, the buoyancy acting on the float 3 increases, at this time, the float 3 moves upward, since the driving structure of the float 3 is movably connected with the lever transmission structure, and since the force arm between the lever transmission structure and the driving structure is greater than the force arm between the lever transmission structure and the pressure regulating piece, the force acting on the pressure regulating piece is increased during the upward movement of the float 3 through the amplification transmission of the driving structure of the float 3 and the lever transmission structure, thereby driving the pressure regulating piece to increase the opening pressure of the overflow device 2, so that the overflow device 2 can be opened only under a higher pressure. Figure 6 , if the salinity of the normal-pressure seawater increases, the buoyancy acting on the float 3 increases, at this time, the float 3 moves upward, since the driving structure of the float 3 is movably connected with the lever transmission structure, and since the force arm between the lever transmission structure and the driving structure is greater than the force arm between the lever transmission structure and the pressure regulating piece, the force acting on the pressure regulating piece is increased during the upward movement of the float 3 through the amplification transmission of the driving structure of the float 3 and the lever transmission structure, thereby driving the pressure regulating piece to increase the opening pressure of the overflow device 2, so that the overflow device 2 can be opened only under a higher pressure.

[0034] As shown in Figure 5 and Figure 6As shown in the low consumption type seawater desalination energy recovery device of the embodiment, further, the driving structure is a driving block 31; the driving block 31 is provided with a first driving slope 32; the driving block 31 is movably matched with the lever transmission structure through the first driving slope 32; the adjusting piece is provided with a second driving slope 244; the adjusting piece is movably matched with the lever transmission structure through the second driving slope 244. In this embodiment, the first driving slope 32 is arranged on the driving block 31, and the second driving slope 244 is arranged on the adjusting piece, so that the lever transmission structure is wedge-shaped matched with the driving block 31 and the adjusting piece, to adapt to the floating displacement of the buoy 3.

[0035] As shown in the low consumption type seawater desalination energy recovery device of the embodiment, further, the driving structure is a driving block 31; the driving block 31 is provided with a first driving slope 32; the driving block 31 is movably matched with the lever transmission structure through the first driving slope 32; the adjusting piece is provided with a second driving slope 244; the adjusting piece is movably matched with the lever transmission structure through the second driving slope 244. In this embodiment, the first driving slope 32 is arranged on the driving block 31, and the second driving slope 244 is arranged on the adjusting piece, so that the lever transmission structure is wedge-shaped matched with the driving block 31 and the adjusting piece, to adapt to the floating displacement of the buoy 3. Figure 5 Figure 6 As shown in the low consumption type seawater desalination energy recovery device of the embodiment, further, the driving structure is a driving block 31; the driving block 31 is provided with a first driving slope 32; the driving block 31 is movably matched with the lever transmission structure through the first driving slope 32; the adjusting piece is provided with a second driving slope 244; the adjusting piece is movably matched with the lever transmission structure through the second driving slope 244. In this embodiment, the first driving slope 32 is arranged on the driving block 31, and the second driving slope 244 is arranged on the adjusting piece, so that the lever transmission structure is wedge-shaped matched with the driving block 31 and the adjusting piece, to adapt to the floating displacement of the buoy 3. Figure 5 Figure 6 As shown in the low consumption type seawater desalination energy recovery device of the embodiment, further, the driving structure is a driving block 31; the driving block 31 is provided with a first driving slope 32; the driving block 31 is movably matched with the lever transmission structure through the first driving slope 32; the adjusting piece is provided with a second driving slope 244; the adjusting piece is movably matched with the lever transmission structure through the second driving slope 244. In this embodiment, the first driving slope 32 is arranged on the driving block 31, and the second driving slope 244 is arranged on the adjusting piece, so that the lever transmission structure is wedge-shaped matched with the driving block 31 and the adjusting piece, to adapt to the floating displacement of the buoy 3.

[0036] Specifically, as shown in the low consumption type seawater desalination energy recovery device of the embodiment, further, the driving structure is a driving block 31; the driving block 31 is provided with a first driving slope 32; the driving block 31 is movably matched with the lever transmission structure through the first driving slope 32; the adjusting piece is provided with a second driving slope 244; the adjusting piece is movably matched with the lever transmission structure through the second driving slope 244. In this embodiment, the first driving slope 32 is arranged on the driving block 31, and the second driving slope 244 is arranged on the adjusting piece, so that the lever transmission structure is wedge-shaped matched with the driving block 31 and the adjusting piece, to adapt to the floating displacement of the buoy 3. Figure 5As shown, when the salinity of seawater at normal pressure increases, the buoyancy of buoy 3 increases. At this time, buoy 3 drives drive block 31 to move upward. Drive block 31, through the cooperation of first drive inclined surface 32 and fourth drive inclined surface 441, squeezes third wedge block 44 to slide horizontally towards first wedge block 42. Thus, through the cooperation of fifth drive inclined surface 442 and third drive inclined surface 421, it squeezes first wedge block 42 to move downward, causing one end of lever arm 41 to swing downward and the other end of lever arm 41 to swing upward, thereby driving second wedge block 43 to move upward. 43. By cooperating with the second driving inclined surface 244 through the sixth driving inclined surface 431, the adjusting member is squeezed to retract, thereby increasing the opening pressure of the overflow device 2 to adapt to the high salinity inlet pressure requirements. Since the distance between the first wedge block 42 and the fulcrum of the lever arm 41 is greater than the distance between the second wedge block 43 and the fulcrum of the lever arm 41, according to the lever principle, the force exerted by the third wedge block 44 on the first wedge block 42 is less than the force exerted by the second wedge block 43 on the adjusting member, thereby amplifying the force so that there is enough driving force to drive the adjusting member to retract.

[0037] Similarly, such as Figure 6 As shown, when the salinity of seawater at normal pressure decreases, the buoyancy of buoy 3 decreases, and buoy 3 drives drive block 31 to move downward. At this time, the adjusting component extends outward, causing the second wedge block 43 to move downward. The other end of lever arm 41 swings downward, and one end of lever arm 41 swings upward, thereby causing the first wedge block 42 to move upward and squeeze the third wedge block 44 to slide horizontally toward drive block 31. This allows the fourth driving inclined surface 441 of the third wedge block 44 to maintain contact with the first driving inclined surface 32 of drive block 31, thereby realizing the adjustment of the opening pressure of overflow device 2.

[0038] like Figure 3 , Figures 5 to 7 As shown, in this embodiment of the low-energy-consumption seawater desalination energy recovery device, the overflow device 2 includes an overflow valve body 21; the overflow valve body 21 is provided with an overflow inlet 211 for communicating with the pressurization chamber 11; an overflow valve core 22 for opening and closing the overflow inlet 211 is provided inside the overflow inlet 211; an overflow outlet 212 for discharging pressurized raw water is provided on one side of the overflow valve body 21; a pressure regulating spring 23 is connected between the overflow valve core 22 and the adjusting component. In this embodiment of the low-energy-consumption seawater desalination energy recovery device, the adjusting component includes an adjusting plate 241 movably disposed within the overflow valve body 21, a rod 242 fixedly connected at one end to the adjusting plate 241, and an adjusting block 243 connected to the other end of the rod 242 and located outside the overflow valve body 21; a pressure regulating spring 23 is connected between the adjusting plate 241 and the overflow valve core 22; the rod 242 movably passes through the overflow valve body 21; the adjusting block 243 is provided with a second driving inclined surface 244.

[0039] Specifically, the second driving inclined surface 244 of the adjusting block 243 is kept in contact with the sixth driving inclined surface 431 of the second wedge block 43 under the elastic force of the pressure regulating spring 23; the overflow valve core 22 closes the overflow inlet 211 under the elastic force of the pressure regulating spring 23. When the pressure of the raw water after pressurization in the pressurization chamber 11 reaches the opening pressure of the overflow valve core 22, the overflow valve core 22 compresses the pressure regulating spring 23, thereby opening the overflow inlet 211. At this time, the raw water in the pressurization chamber 11 enters the overflow valve body 21 and is discharged into the storage chamber 13 through the overflow outlet 212 on the overflow valve body 21. Figure 5 As shown, when the salinity of seawater at normal pressure increases, the buoyancy of buoy 3 increases. At this time, buoy 3 drives the drive block 31 upward, squeezing the third wedge block 44 to slide horizontally towards the first wedge block 42, squeezing the first wedge block 42 downward. This causes one end of the lever arm 41 to swing downward, and the other end to swing upward, thus driving the second wedge block 43 upward. The second wedge block 43 squeezes the adjusting block 243 away from the lever arm 41, thereby pushing the adjusting plate 241 towards the overflow valve core 22, and compressing the pressure regulating spring 23. This increases the opening pressure of the overflow valve core 22, meaning the raw water in the pressurized chamber 11 needs greater pressure to push the overflow valve core 22 to open the overflow inlet 211; conversely, if... Figure 6 As shown, when the salinity of seawater at normal pressure decreases, the buoyancy of buoy 3 decreases, and buoy 3 drives drive block 31 to move downward. Drive block 31 releases the thrust on third wedge block 44. At this time, pressure regulating spring 23 recovers part of its deformation, that is, the compression of pressure regulating spring 23 decreases, thereby pushing regulating plate 241 away from overflow valve core 22. Regulating plate 241 drives regulating block 243 to move toward second wedge block 43 through rod 242, thereby squeezing second wedge block 43 to move downward. Through the transmission of lever arm 41, first wedge block 42 moves upward, thereby pushing third wedge block 44 to slide toward drive block 31. This reduces the opening pressure of overflow valve core 22, that is, the raw water in pressurized chamber 11 can push overflow valve core 22 to move with lower pressure to open overflow inlet 211.

[0040] like Figures 1 to 4 ,as well as Figure 8As shown, the low-consumption seawater desalination energy recovery device of the embodiment further comprises a recovery power member and a piston member 65; the recovery power member is connected with the wastewater discharge end of the reverse osmosis filter core 5 through the high-pressure wastewater outlet pipeline, so as to drive the piston member 65 to reciprocate under the energy of the wastewater, thereby pressurizing the raw water in the pressurizing cavity 11; the plug part of the piston member 65 is movably arranged in the pressurizing cavity 11; the plug rod of the piston member 65 is connected with the output end of the recovery power member. The low-consumption seawater desalination energy recovery device of the embodiment further comprises a recovery bin 611 and a recovery rotor 612 rotatably arranged in the recovery bin 611; the shaft body of the recovery rotor 612 extends outside the recovery bin 611 and is provided with a swing rod 613 at one end; the swing rod 613 is hingedly connected with a first connecting rod 62 at the other end; the first connecting rod 62 is hingedly connected with a driving sliding block 63 at the end away from the swing rod 613; the driving sliding block 63 is slidably arranged on the recovery seat 1; the driving sliding block 63 is hingedly connected with a second connecting rod 64; the second connecting rod 64 is hingedly connected with the plug rod of the piston member 65 at the end away from the driving sliding block 63. The recovery bin 611 is connected with a low-pressure wastewater outlet pipeline for discharging low-pressure wastewater, so that the low-pressure wastewater after energy recovery can be discharged from the recovery bin 611.

[0041] Specifically, the high-pressure wastewater generated by the reverse osmosis filter core 5 is discharged into the recovery bin 611 through the high-pressure wastewater outlet pipeline, thereby driving the recovery rotor 612 in the recovery bin 611 to rotate, the recovery rotor 612 drives the swing rod 613 to rotate, the swing rod 613 drives the driving sliding block 63 to reciprocate through the first connecting rod 62, and the driving sliding block 63 drives the piston to reciprocate in the recovery seat 1 through the second connecting rod 64, thereby pressurizing the raw water in the pressurizing cavity 11 and sending it by the pressurizing pump 7, realizing the recovery of the wastewater energy and reducing the working load of the pressurizing pump 7, so as to avoid the requirement of using a high-power pressurizing pump 7, thereby reducing the energy consumption generated by the seawater desalination treatment.

[0042] As shown in Figures 1 to 4 , and Figure 8 As shown, the low-consumption seawater desalination energy recovery device of the embodiment further comprises a recovery bin 611 extending with a mounting plate 6111 on one side; the mounting plate 6111 is fixedly connected with the recovery seat 1; the mounting plate 6111 is provided with a limiting strip hole 6112; the bottom of the driving sliding block 63 is provided with a limiting shaft 631; the limiting shaft 631 is movably embedded in the limiting strip hole 6112; and the second connecting rod 64 is hingedly connected with the limiting shaft 631. The limiting shaft 631 cooperates with the limiting strip hole 6112 to limit and guide the driving sliding block 63, so that the second connecting rod 64 can only move horizontally, thereby reliably driving the piston member 65 to reciprocate, and the structure has higher reliability.

[0043] The above merely describes preferred embodiments of the present application, and equivalent changes or modifications made according to the structure, features and principles described in the patent application scope of the present application are included in the patent application protection scope of the present application.

Claims

1. A low consumption type seawater desalination energy recovery device, characterized by, The recovery seat is provided with a pressurizing cavity and a salinity detection cavity communicated with the pressurizing cavity on one side of the pressurizing cavity; the recovery seat is further provided with an overflow device for discharging the pressurized raw water from the pressurizing cavity on one side of the pressurizing cavity; the overflow device is provided with a pressure regulating member for regulating the opening pressure of the overflow device; a float is movably arranged in the salinity detection cavity; the bottom end of the float is movably sealed and arranged outside the salinity detection cavity and is provided with a driving structure; The recovery seat is provided with a lever transmission structure between the driving structure and the pressure regulating member; the two ends of the lever transmission structure are movably connected with the driving structure and the pressure regulating member respectively, and the force arm between the lever transmission structure and the driving structure is greater than the force arm between the lever transmission structure and the pressure regulating member, so as to amplify the force acting on the pressure regulating member, thereby driving the pressure regulating member to regulate the opening pressure of the overflow device; The driving structure is a driving block; the driving block is provided with a first driving slope; the driving block is movably matched with the lever transmission structure through the first driving slope; the pressure regulating member is provided with a second driving slope; the pressure regulating member is movably matched with the lever transmission structure through the second driving slope; The overflow device comprises an overflow valve body; the overflow valve body is provided with an overflow inlet for being communicated with the pressurizing cavity; the overflow inlet is provided with an overflow valve core for opening and closing the overflow inlet; one side of the overflow valve body is provided with an overflow outlet for discharging the pressurized raw water; the overflow valve core is connected with the pressure regulating member through a pressure regulating spring; The pressure regulating member comprises a regulating plate movably arranged in the overflow valve body, a rod body fixedly connected with one end of the regulating plate, and a regulating block connected with the other end of the rod body and located outside the overflow valve body; the pressure regulating spring is connected between the regulating plate and the overflow valve core; the rod body is movably penetrated in the overflow valve body; the regulating block is provided with the second driving slope; The recovery seat is provided with a storage cavity for storing the pressurized raw water on one side of the pressurizing cavity; the storage cavity is communicated with the overflow outlet; The low-consumption seawater desalination energy recovery device further comprises a reverse osmosis filter core and an energy recovery driving mechanism arranged in the recovery seat; The raw water inlet end of the reverse osmosis filter core is connected with a pressurizing pump; the raw water inlet end of the pressurizing pump is communicated with the storage cavity through a pressurized water outlet pipeline in a unidirectional manner; the energy recovery driving mechanism comprises a recovery power member and a piston member; the recovery power member is connected with the waste water discharge end of the reverse osmosis filter core through a high-pressure waste water outlet pipeline, so as to drive the piston member to reciprocate under the energy of the waste water, thereby pressurizing the raw water in the pressurizing cavity; the plug part of the piston member is movably arranged in the pressurizing cavity; the plug rod of the piston member is connected with the output end of the recovery power member.

2. A low consumption type seawater desalination energy recovery device according to claim 1, characterized in that, The lever transmission structure comprises a lever arm hinged on the recovery seat, and a first wedge block and a second wedge block movably arranged in the recovery seat; the first wedge block is movably hinged with one end of the lever arm; the second wedge block is movably hinged with the other end of the lever arm; the distance between the first wedge block and the fulcrum of the lever arm is greater than the distance between the second wedge block and the fulcrum of the lever arm; the second wedge block is movably matched with the second driving slope of the pressure regulating member. The lever transmission structure further comprises a third wedge block horizontally slidingly arranged on the recovery seat; and the two ends of the third wedge block are respectively in movable connection with the first driving slope of the driving block and the first wedge block.

3. A low consumption type seawater desalination energy recovery device according to claim 2, characterized in that, The first wedge block is provided with a third driving slope; one end of the third wedge block is provided with a fourth driving slope in wedge connection with the first driving slope, and the other end is provided with a fifth driving slope in wedge connection with the third driving slope; and the second wedge block is provided with a sixth driving slope in wedge connection with the second driving slope.

4. A low consumption type seawater desalination energy recovery device according to claim 1, characterized in that, The recovery power member comprises a recovery bin and a recovery rotor rotatably arranged in the recovery bin; one end of the shaft body of the recovery rotor extends out of the recovery bin and is provided with a swing lever; the distal end of the swing lever is hingedly connected with a first connecting rod; one end of the first connecting rod away from the swing lever is hingedly connected with a driving sliding block; the driving sliding block is slidingly arranged on the recovery seat; the driving sliding block is hingedly connected with a second connecting rod; one end of the second connecting rod away from the driving sliding block is hingedly connected with the plug rod of the piston member.

5. A low consumption type energy recovery device for seawater desalination according to claim 4, characterized in that, One side of the recovery bin extends an installation plate; the installation plate is fixedly connected to the recovery seat; the installation plate is provided with a limiting strip hole; the bottom of the driving sliding block protrudes a limiting shaft; the limiting shaft is movably embedded in the limiting strip hole; and the second connecting rod is hingedly connected to the limiting shaft.

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