CN219507715U - Seawater desalination residual pressure energy recovery device and system - Google Patents
Seawater desalination residual pressure energy recovery device and system Download PDFInfo
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- CN219507715U CN219507715U CN202321439170.0U CN202321439170U CN219507715U CN 219507715 U CN219507715 U CN 219507715U CN 202321439170 U CN202321439170 U CN 202321439170U CN 219507715 U CN219507715 U CN 219507715U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The utility model discloses a seawater desalination residual pressure energy recovery device and a system, wherein the device comprises: a cylinder; the cylinder body includes: the device comprises a main pressure module, a first auxiliary pressure module, a high-pressure concentrated seawater inlet, a high-pressure seawater outlet, a low-pressure concentrated seawater outlet and a low-pressure seawater inlet; the main pressure module includes: the main cavity, the main piston, the first double-control valve, the second double-control valve and the connecting rod; the first double control valve is connected with the high-pressure concentrated seawater inlet, the left chamber and the right chamber; the second double-control valve is connected with the low-pressure concentrated seawater outlet, the left chamber and the right chamber; the first secondary pressure module includes: the first auxiliary cavity, the first auxiliary piston, the first control valve, the second control valve and the third double control valve; the third double control valve is connected with the low-pressure seawater inlet, the left auxiliary chamber and the right auxiliary chamber; the connecting rod connects the primary piston with the first secondary piston. According to the scheme, the connecting rod, the main piston, the first auxiliary piston, the first double-control valve and the second double-control valve are matched with each other, so that the recovery of the double-way residual pressure energy of the seawater can be realized, and the recovery efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of sea water desalination, in particular to a sea water desalination residual pressure energy recovery device and a sea water desalination residual pressure energy recovery system.
Background
The sea water desalting process includes heat process and membrane process, and the membrane process has wide application. When the membrane reverse osmosis seawater desalination system works under different working conditions, seawater needs to be pressurized to high pressure of 5.8-8.0 MPa, the residual pressure of the desalinated concentrated seawater still reaches 5.0-6.5 MPa, and if the desalinated concentrated seawater is directly discharged into the natural environment, the high pressure energy is wasted, so that the residual pressure energy can be recovered by using a residual pressure energy recovery device.
The conventional residual pressure energy recovery device can be divided into a centrifugal type and a positive displacement type according to the working principle. The positive displacement residual pressure energy recovery device directly pressurizes the low-pressure seawater by utilizing the high-pressure concentrated seawater, and the recovery efficiency is higher than that of the centrifugal type, so that the positive displacement residual pressure energy recovery device is popular in the market. However, the traditional positive displacement residual pressure energy recovery device needs to be connected with a plurality of cylinders in parallel to realize conversion of different fluid phases, and only one-way residual pressure energy recovery can be realized, so that the recovery efficiency is limited.
Disclosure of Invention
In view of the above, the present utility model is to provide a device and a system for recovering residual pressure energy of sea water desalination, which are used for solving the problem of low recovery efficiency of the existing positive displacement residual pressure energy recovery device.
In order to achieve the above technical object, a first aspect of the present utility model provides a device for recovering residual pressure energy of sea water desalination, comprising: a cylinder;
the cylinder includes: the device comprises a main pressure module, a first auxiliary pressure module, a high-pressure concentrated seawater inlet, a high-pressure seawater outlet, a low-pressure concentrated seawater outlet and a low-pressure seawater inlet;
the main pressure module includes: the main cavity, the main piston, the first double-control valve, the second double-control valve and the connecting rod;
the main piston is movably arranged in the main cavity along a first direction and divides the main cavity into a left cavity and a right cavity;
three ports of the first double control valve are respectively connected with the high-pressure concentrated seawater inlet, the left chamber and the right chamber;
the three ports of the second double-control valve are respectively connected with the low-pressure concentrated seawater outlet, the left chamber and the right chamber;
the first secondary pressure module includes: the first auxiliary cavity, the first auxiliary piston, the first control valve, the second control valve and the third double control valve;
the first auxiliary piston is movably arranged in the first auxiliary cavity along a first direction and divides the first auxiliary cavity into a left auxiliary cavity and a right auxiliary cavity;
the left auxiliary chamber and the right auxiliary chamber are respectively connected with a high-pressure seawater outlet through the first control valve and the second control valve;
three ports of the third double control valve are respectively connected with the low-pressure seawater inlet, the left auxiliary chamber and the right auxiliary chamber;
the main cavity and the first auxiliary cavity are mutually separated;
the connecting rod connects the primary piston with the first secondary piston so that the primary piston and the first secondary piston move synchronously.
Further, the cylinder further includes: a second sub-pressure module;
the second secondary pressure module includes: the second auxiliary cavity, the second auxiliary piston, the third control valve, the fourth control valve and the fourth double control valve;
the second auxiliary piston is movably arranged in the second auxiliary cavity along the first direction and divides the second auxiliary cavity into a second left auxiliary cavity and a second right auxiliary cavity;
the second left auxiliary chamber and the second right auxiliary chamber are respectively connected with a high-pressure seawater outlet through the third control valve and the fourth control valve;
three ports of the fourth double control valve are respectively connected with the low-pressure seawater inlet, the second left auxiliary chamber and the second right auxiliary chamber;
the main cavity and the second auxiliary cavity are mutually separated;
the connecting rod is connected with the second auxiliary piston so as to enable the main piston, the first auxiliary piston and the second auxiliary piston to synchronously move.
Further, the second auxiliary cavity and the first auxiliary cavity are respectively arranged at two sides of the main cavity along the first direction.
Further, the first secondary pressure module includes: a plurality of first auxiliary cavities;
the second auxiliary pressure module comprises a plurality of second auxiliary cavities.
Further, the cylinder further includes: a partition plate;
the main cavity and the first auxiliary cavity are separated by the partition board.
Further, the partition plate is of a middle bulge structure, and a flow passage is arranged on the periphery of the partition plate.
Further, the primary lumen has a diameter greater than the diameter of the first secondary lumen.
Further, the primary lumen has a diameter greater than the diameters of the first and second secondary lumens.
Further, the first control valve, the second control valve, the third control valve and the fourth control valve are pressure limiting valves which are opened after reaching preset pressure.
The second aspect of the utility model provides a seawater desalination residual pressure energy recovery system, comprising: the device comprises a low-pressure seawater tank, a low-pressure concentrated seawater collecting box, a fresh water collecting box, a high-pressure pump, a booster pump, a reverse osmosis membrane component and a cylinder body of any one of the above components;
the low-pressure seawater tank is connected with the reverse osmosis membrane assembly through the high-pressure pump, so that low-pressure seawater enters the reverse osmosis membrane assembly for reverse osmosis seawater desalination;
the fresh water collecting box is connected with the reverse osmosis membrane assembly and is used for collecting fresh water after seawater desalination;
the high-pressure concentrated seawater inlet of the cylinder body is connected with the reverse osmosis membrane assembly and is used for collecting the high-pressure concentrated seawater after seawater desalination;
the low-pressure concentrated seawater outlet of the cylinder body is connected with the low-pressure concentrated seawater collecting box;
the low-pressure seawater inlet of the cylinder body is connected with the low-pressure seawater tank;
the cylinder body high-pressure seawater outlet is connected with the reverse osmosis membrane assembly through a booster pump.
According to the technical scheme, the utility model provides a seawater desalination residual pressure energy recovery device and a seawater desalination residual pressure energy recovery system; wherein, sea water desalination residual pressure energy recovery unit includes: a cylinder; the cylinder includes: the device comprises a main pressure module, a first auxiliary pressure module, a high-pressure concentrated seawater inlet, a high-pressure seawater outlet, a low-pressure concentrated seawater outlet and a low-pressure seawater inlet; the main pressure module includes: the main cavity, the main piston, the first double-control valve, the second double-control valve and the connecting rod; the main piston is movably arranged in the main cavity along a first direction and divides the main cavity into a left cavity and a right cavity; three ports of the first double control valve are respectively connected with the high-pressure concentrated seawater inlet, the left chamber and the right chamber; the three ports of the second double-control valve are respectively connected with the low-pressure concentrated seawater outlet, the left chamber and the right chamber; the first secondary pressure module includes: the first auxiliary cavity, the first auxiliary piston, the first control valve, the second control valve and the third double control valve; the first auxiliary piston is movably arranged in the first auxiliary cavity along a first direction and divides the first auxiliary cavity into a left auxiliary cavity and a right auxiliary cavity; the left auxiliary chamber and the right auxiliary chamber are respectively connected with a high-pressure seawater outlet through the first control valve and the second control valve; three ports of the third double control valve are respectively connected with the low-pressure seawater inlet, the left auxiliary chamber and the right auxiliary chamber; the main cavity and the first auxiliary cavity are mutually separated; the connecting rod connects the primary piston with the first secondary piston so that the primary piston and the first secondary piston move synchronously.
According to the scheme, the connecting rod is used for connecting the main piston with the first auxiliary piston, the first auxiliary piston can be driven to synchronously move in the process of reciprocating movement of the main piston in the main cavity, and the first double-control valve and the second double-control valve are matched to realize recovery of the double-way residual pressure energy of the seawater, so that the recovery efficiency is improved, the problem that the conventional positive displacement residual pressure energy recovery device can only carry out single-way recovery and the recovery efficiency is lower is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a device for recovering residual pressure energy in sea water desalination according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the operation of the device for recovering residual pressure energy of sea water desalination at a certain moment according to the embodiment of the utility model;
FIG. 3 is a schematic diagram of a system for recovering residual pressure energy in sea water desalination according to an embodiment of the present utility model;
in the figure:
a low-pressure seawater tank 1, a low-pressure concentrated seawater collecting tank 2, a fresh water collecting tank 3, a high-pressure pump 4, a cylinder 5, a booster pump 6 and a reverse osmosis membrane component 7;
a high-pressure concentrated seawater inlet 101, a high-pressure seawater outlet 102, a low-pressure concentrated seawater outlet 103, and a low-pressure seawater inlet 104;
a first double control valve 201, a second double control valve 202, a third double control valve 203, a fourth double control valve 204;
a first control valve 301, a second control valve 302, a third control valve 303, a fourth control valve 304;
a main chamber 401, a first auxiliary chamber 402, a second auxiliary chamber 403;
a master piston 501, a first slave piston 502, and a second slave piston 503;
a connecting rod 601;
a spacer 701.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments disclosed in the specification without making any inventive effort, are intended to be within the scope of the utility model as claimed.
In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1 and 2, a first aspect of the present utility model provides a device for recovering residual pressure energy of sea water desalination, comprising: and a cylinder 5.
The cylinder 5 includes: the system comprises a main pressure module, a first auxiliary pressure module, a high-pressure concentrated seawater inlet 101, a high-pressure seawater outlet 102, a low-pressure concentrated seawater outlet 103 and a low-pressure seawater inlet 104.
The main pressure module includes: main chamber 401, main piston 501, first double control valve 201, second double control valve 202, and connecting rod 601; the main piston 501 is movably arranged in the main cavity 401 along the first direction, and divides the main cavity 401 into a left cavity and a right cavity; the first direction may be a left-right direction of fig. 1.
Three ports of the first double control valve 201 are respectively connected with the high-pressure concentrated seawater inlet 101, the left chamber and the right chamber; the first double control valve 201 is used for controlling the on-off of the high-pressure concentrated seawater inlet 101 and the left chamber, and for controlling the on-off of the high-pressure concentrated seawater inlet 101 and the right chamber.
The three ports of the second double control valve 202 are respectively connected with the low-pressure concentrated seawater outlet 103, the left chamber and the right chamber; the second double control valve 202 is used for controlling the on-off of the low-pressure concentrated seawater outlet 103 and the left chamber, and for controlling the on-off of the low-pressure concentrated seawater outlet 103 and the right chamber.
The first secondary pressure module includes: first auxiliary chamber 402, first auxiliary piston 502, first control valve 301, second control valve 302, and third double control valve 203; the first auxiliary piston 502 is movably arranged in the first auxiliary cavity 402 along the first direction, and divides the first auxiliary cavity 402 into a left auxiliary cavity and a right auxiliary cavity; the left auxiliary chamber and the right auxiliary chamber are respectively connected with the high-pressure seawater outlet 102 through a first control valve 301 and a second control valve 302.
Three ports of the third double control valve 203 are respectively connected with the low-pressure seawater inlet 104, the left auxiliary chamber and the right auxiliary chamber; the third double control valve 203 is used for controlling the on-off of the low-pressure seawater inlet 104 and the left auxiliary chamber, and for controlling the on-off of the low-pressure seawater inlet 104 and the right auxiliary chamber.
The main cavity 401 and the first auxiliary cavity 402 are separated from each other; the connecting rod 601 connects the master piston 501 with the first slave piston 502 to synchronize the movement of the master piston 501 with the first slave piston 502.
In this embodiment, when the main piston 501 performs a piston movement in the main cavity 401, the first auxiliary piston 502 may be driven to move synchronously, so as to drive the left auxiliary chamber or the right auxiliary chamber in the first auxiliary chamber 402 to compress the seawater in the chamber. The first double control valve 201, the second double control valve 202 and the third double control valve 203 play a role in limiting the fluid flow direction and regulating the working state of the device, and ensure the order of fluid entering and exiting the chambers under different working states of the main chamber and the auxiliary chamber.
Taking the example of the initial position of the primary piston 501 being at the left end of the primary chamber 401, likewise, the first secondary piston 502 is at the left end of the first secondary chamber 402; keeping the first double control valve 201 and the second double control valve 202 in the initial states in the closed state, and controlling the first double control valve 201 to communicate the high-pressure concentrated seawater inlet 101 with the left chamber, so that the high-pressure concentrated seawater enters the left chamber through the high-pressure concentrated seawater inlet 101 to push the main piston 501 to move to the right, and synchronously driving the first auxiliary piston 502 to move to the right by the main piston 501; during the movement of the primary piston 502 and the first secondary piston 502 to the right, both will push the low pressure seawater in the right chamber and the right secondary chamber, causing the pressure to increase continuously to high pressure seawater. When the seawater pressure in the right auxiliary chamber reaches the preset pressure, the second control valve 302 is controlled to be opened, so that the high-pressure seawater in the right auxiliary chamber flows out through the high-pressure seawater outlet 102. Meanwhile, in the process that the first auxiliary piston 502 moves to the right, the low-pressure seawater inlet 104 enters the left auxiliary chamber through the third double control valve 203 to fill the left auxiliary chamber, so that one-way residual pressure energy recovery is completed.
When the main piston 501 moves back, the first double-control valve 201 is controlled to be communicated with the high-pressure concentrated seawater inlet 101 and the right chamber and close the high-pressure concentrated seawater inlet 101 and the left chamber, the second double-control valve 202 is controlled to be communicated with the low-pressure concentrated seawater outlet 103 and the left chamber and close the low-pressure concentrated seawater outlet 103 and the right chamber, and the third double-control valve 203 is controlled to be communicated with the low-pressure seawater inlet 104 and the right auxiliary chamber and close the low-pressure seawater inlet 104 and the left auxiliary chamber, so that in the process that the main piston 501 drives the first auxiliary piston 502 to move back to the left, the low-pressure seawater in the left auxiliary chamber can be compressed, the recovery of double-pass residual pressure energy is realized, and the recovery efficiency of residual pressure energy is improved.
Similarly, in the process of the return movement of the first auxiliary piston 502 to the left, when the seawater pressure in the left auxiliary chamber reaches the preset pressure, the first control valve 301 can be controlled to be opened, so that the high-pressure seawater in the left auxiliary chamber can flow out through the high-pressure seawater outlet 102.
The first control valve 301 and the second control valve 302 are pressure limiting valves that are opened when reaching a preset pressure, so as to control the outlet pressure of the high-pressure seawater.
In another embodiment, the cylinder 5 further comprises: a second sub-pressure module; the second sub-pressure module includes: a second slave chamber 403, a second slave piston 503, a third control valve 303, a fourth control valve 304, and a fourth dual control valve 204; the second auxiliary piston 503 is movably disposed in the second auxiliary chamber 403 along the first direction, and divides the second auxiliary chamber 403 into a second left auxiliary chamber and a second right auxiliary chamber; the second left auxiliary chamber and the second right auxiliary chamber are respectively connected with the high-pressure seawater outlet 102 through a third control valve 303 and a fourth control valve 304; the three ports of the fourth double control valve 204 are respectively connected with the low-pressure seawater inlet 104, the second left auxiliary chamber and the second right auxiliary chamber; the main cavity 401 and the second auxiliary cavity 403 are separated from each other; connecting rod 601 connects the second slave piston 503 to synchronize the movement of the master piston 501, the first slave piston 502, and the second slave piston 503.
Similarly, the third control valve 303 and the fourth control valve 304 may be pressure limiting valves that are opened when the preset pressure is reached, so as to control the outlet pressure of the high-pressure seawater.
Specifically, in this embodiment, the primary piston 501 may drive the first secondary piston 502 and the second secondary piston 503 to move synchronously, so as to drive the first secondary pressure module and the second secondary pressure module to recover residual pressure energy synchronously, which may further improve recovery efficiency.
The specific recovery process can be as follows:
first, the main piston 501, the first auxiliary piston 502 and the second auxiliary piston 503 are all located at the left end, and the first double control valve 201 is controlled to communicate the high-pressure concentrated seawater inlet 101 with the left chamber, so that the high-pressure concentrated seawater enters the left chamber through the high-pressure concentrated seawater inlet 101 to push the main piston 501 to move to the right;
thereafter, the primary piston 501 synchronously drives the first secondary piston 502 and the second secondary piston 503 to move to the right; in the process of moving the main piston 502, the first auxiliary piston 502 and the second auxiliary piston 503 to the right, the three respectively push the low-pressure seawater in the right chamber, the right auxiliary chamber and the second right auxiliary chamber, so that the pressure of the low-pressure seawater is continuously increased to be high-pressure seawater.
And then, when the seawater pressure in the right auxiliary chamber and the second right auxiliary chamber reaches the preset pressure, the second control valve 302 and the fourth control valve 304 are controlled to be opened, so that the high-pressure seawater in the right auxiliary chamber and the second right auxiliary chamber flows out through the high-pressure seawater outlet 102. Meanwhile, in the process that the first auxiliary piston 502 and the second auxiliary piston 503 move to the right, the low-pressure seawater inlet 104 enters the left auxiliary chamber and the second left auxiliary chamber through the third double control valve 203 and the fourth double control valve 204, and fills the left auxiliary chamber and the second left auxiliary chamber, so that one-way residual pressure energy recovery is completed.
When the main piston 501 moves in the back stroke, the first double control valve 201 is controlled to be communicated with the high-pressure concentrated seawater inlet 101 and the right chamber and close the high-pressure concentrated seawater inlet 101 and the left chamber, the second double control valve 202 is controlled to be communicated with the low-pressure concentrated seawater outlet 103 and the left chamber and close the low-pressure concentrated seawater outlet 103 and the right chamber, the third double control valve 203 is controlled to be communicated with the low-pressure seawater inlet 104 and the right auxiliary chamber and close the low-pressure seawater inlet 104 and the left auxiliary chamber, and the fourth double control valve 204 is controlled to be communicated with the low-pressure seawater inlet 104 and the second right auxiliary chamber and close the low-pressure seawater inlet 104 and the second left auxiliary chamber, so that in the process that the main piston 501 drives the first auxiliary piston 502 and the second auxiliary piston 503 to move in the back stroke to the left, the low-pressure seawater in the left auxiliary chamber and the second left auxiliary chamber can be compressed, the recovery of double-stroke residual pressure energy is realized, and the recovery efficiency of residual pressure energy is improved.
In one embodiment, the second auxiliary chamber 403 and the first auxiliary chamber 402 are disposed on two sides of the main chamber 401 along the first direction, so that the connecting rod 601 drives the first auxiliary piston 502 and the second auxiliary piston 503 to move synchronously.
In another embodiment, the first secondary pressure module comprises: a number of first subchambers 402; the second sub-pressure module comprises a number of second sub-chambers 403.
Specifically, the number of the second auxiliary cavities 403 and the first auxiliary cavities 402 can be set according to actual needs, so as to raise the upper limit of the recovery of the once-through residual pressure energy of the device.
In one embodiment, the cylinder 5 further comprises: a spacer 701; the main chamber 401 and the first sub chamber 402 are partitioned by a partition plate 701.
Specifically, a partition 701 may be provided at both ends of the cylinder 5 such that a second right sub-chamber is defined between the partition 701 and the second sub-piston 503, and a left sub-chamber is defined between the partition 701 and the first sub-piston 502.
Further, the diaphragm 701 has a middle convex structure and is provided with a flow passage at the outer circumference for the flow of seawater. At the same time, the partition 701 at both ends of the main chamber 401, the first auxiliary chamber 402 and the second auxiliary chamber 403 also serves to prevent the flow passage from being blocked when the main and auxiliary pistons move to the chamber end faces.
In one embodiment, the diameter of the primary lumen 401 is greater than the diameter of the first secondary lumen 402 and/or the second secondary lumen 403.
That is, in this embodiment, the cylinder 5 is a cylinder with unequal diameters, the diameter of the cylinder in the middle part of the cylinder is larger than that of the cylinders at two sides of the cylinder, and the diameters of the cylinders at two sides are equal; the diameter of the main piston 501 is larger than that of the first auxiliary piston 502 and the second auxiliary piston 503, and the diameters of the first auxiliary piston 502 and the second auxiliary piston 503 are equal, so that the design aims to increase the volume of the main chamber and the diameter of the main piston under the condition that the volume of the auxiliary chamber and the diameter of the auxiliary piston are unchanged, so that the water inflow of the single-stroke high-pressure concentrated seawater is more, the pressure of the obtained high-pressure seawater is higher, and the single-stroke residual pressure energy recovery capability of the device is improved.
Referring to fig. 3, a second aspect of the present utility model provides a seawater desalination residual pressure energy recovery system, comprising: a low-pressure seawater tank 1, a low-pressure concentrated seawater collecting tank 2, a fresh water collecting tank 3, a high-pressure pump 4, a booster pump 6, a reverse osmosis membrane component 7 and a cylinder 5 of any one of the above components; the low-pressure seawater tank 1 is connected with a reverse osmosis membrane assembly 7 through a high-pressure pump 4, so that low-pressure seawater enters the reverse osmosis membrane assembly 7 for reverse osmosis seawater desalination; the seawater reverse osmosis membrane module 7 is used for carrying out reverse osmosis seawater desalination and then is divided into fresh water and high-pressure concentrated seawater.
The fresh water collecting box 3 is connected with a reverse osmosis membrane assembly 7 and is used for collecting fresh water after sea water desalination; the high-pressure concentrated seawater inlet 101 of the cylinder body 5 is connected with the reverse osmosis membrane assembly 7 and is used for collecting the high-pressure concentrated seawater after seawater desalination; the low-pressure concentrated seawater outlet 103 of the cylinder body 5 is connected with the low-pressure concentrated seawater collecting box 2; the low-pressure seawater inlet 104 of the cylinder body 5 is connected with the low-pressure seawater tank 1; the high-pressure seawater outlet 102 of the cylinder body 5 is connected with the reverse osmosis membrane assembly 7 through the booster pump 6.
In the system, after the high-pressure seawater obtained through the cylinder body 5 is further pressurized by the booster pump 6, the high-pressure seawater is mixed with the high-pressure seawater from the high-pressure pump 4 and then is merged and injected into the reverse osmosis membrane module 7, and the obtained low-pressure concentrated seawater is collected in the low-pressure concentrated seawater collecting box 2.
While the utility model has been described in detail with reference to the examples, it will be apparent to those skilled in the art that the foregoing description of the preferred embodiments of the utility model may be modified or equivalents may be substituted for elements thereof, and that any modifications, equivalents, improvements or changes will fall within the spirit and principles of the utility model.
Claims (10)
1. The utility model provides a sea water desalination residual pressure energy recovery unit which characterized in that includes: a cylinder (5);
the cylinder (5) comprises: the device comprises a main pressure module, a first auxiliary pressure module, a high-pressure concentrated seawater inlet (101), a high-pressure seawater outlet (102), a low-pressure concentrated seawater outlet (103) and a low-pressure seawater inlet (104);
the main pressure module includes: a main cavity (401), a main piston (501), a first double control valve (201), a second double control valve (202) and a connecting rod (601);
the main piston (501) is movably arranged in the main cavity (401) along a first direction, and divides the main cavity (401) into a left cavity and a right cavity;
three ports of the first double control valve (201) are respectively connected with the high-pressure concentrated seawater inlet (101), the left chamber and the right chamber;
three ports of the second double control valve (202) are respectively connected with the low-pressure concentrated seawater outlet (103), the left chamber and the right chamber;
the first secondary pressure module includes: a first secondary chamber (402), a first secondary piston (502), a first control valve (301), a second control valve (302) and a third double control valve (203);
the first auxiliary piston (502) is movably arranged in the first auxiliary cavity (402) along a first direction, and divides the first auxiliary cavity (402) into a left auxiliary cavity and a right auxiliary cavity;
the left auxiliary chamber and the right auxiliary chamber are connected with a high-pressure seawater outlet (102) through the first control valve (301) and the second control valve (302) respectively;
three ports of the third double control valve (203) are respectively connected with the low-pressure seawater inlet (104), the left auxiliary chamber and the right auxiliary chamber;
the main cavity (401) and the first auxiliary cavity (402) are mutually separated;
the connecting rod (601) connects the main piston (501) with the first auxiliary piston (502) so as to enable the main piston (501) to synchronously move with the first auxiliary piston (502).
2. The seawater desalination residual pressure energy recovery apparatus of claim 1, wherein the cylinder (5) further comprises: a second sub-pressure module;
the second secondary pressure module includes: a second slave chamber (403), a second slave piston (503), a third control valve (303), a fourth control valve (304), and a fourth dual control valve (204);
the second auxiliary piston (503) is movably arranged in the second auxiliary cavity (403) along the first direction, and divides the second auxiliary cavity (403) into a second left auxiliary cavity and a second right auxiliary cavity;
the second left auxiliary chamber and the second right auxiliary chamber are connected with a high-pressure seawater outlet (102) through the third control valve (303) and the fourth control valve (304) respectively;
three ports of the fourth double control valve (204) are respectively connected with the low-pressure seawater inlet (104), the second left auxiliary chamber and the second right auxiliary chamber;
the main cavity (401) and the second auxiliary cavity (403) are mutually separated;
the connecting rod (601) connects the second auxiliary piston (503) so as to enable the main piston (501), the first auxiliary piston (502) and the second auxiliary piston (503) to synchronously move.
3. The seawater desalination waste pressure energy recovery apparatus of claim 2, wherein the second auxiliary chamber (403) and the first auxiliary chamber (402) are respectively disposed at both sides of the main chamber (401) in the first direction.
4. A seawater desalination waste pressure energy recovery apparatus as claimed in claim 3, wherein the first sub-pressure module comprises: -a number of said first sub-chambers (402);
the second sub-pressure module comprises a number of the second sub-chambers (403).
5. The seawater desalination residual pressure energy recovery apparatus of claim 1, wherein the cylinder (5) further comprises: a separator (701);
the main cavity (401) and the first auxiliary cavity (402) are separated by the partition plate (701).
6. The seawater desalination waste pressure energy recovery apparatus as claimed in claim 5, wherein the partition plate (701) has a middle protrusion structure and a flow passage is provided at an outer periphery thereof.
7. The seawater desalination waste energy recovery apparatus of claim 1, wherein the main chamber (401) has a diameter larger than the diameter of the first auxiliary chamber (402).
8. The seawater desalination waste energy recovery apparatus of claim 2, wherein the main chamber (401) has a diameter larger than the diameters of the first sub-chamber (402) and the second sub-chamber (403).
9. The device for recovering the residual pressure energy of the sea water desalination according to claim 2, wherein the first control valve (301), the second control valve (302), the third control valve (303) and the fourth control valve (304) are pressure limiting valves which are opened when the preset pressure is reached.
10. A seawater desalination residual pressure energy recovery system, comprising: a low-pressure seawater tank (1), a low-pressure concentrated seawater collecting tank (2), a fresh water collecting tank (3), a high-pressure pump (4), a booster pump (6), a reverse osmosis membrane assembly (7) and the cylinder (5) of any one of claims 1-9;
the low-pressure seawater tank (1) is connected with the reverse osmosis membrane assembly (7) through the high-pressure pump (4) so that the low-pressure seawater is pressurized into high-pressure seawater and then enters the reverse osmosis membrane assembly (7) for reverse osmosis seawater desalination;
the fresh water collecting box (3) is connected with the reverse osmosis membrane assembly (7) and is used for collecting fresh water after seawater desalination;
the high-pressure concentrated seawater inlet (101) of the cylinder body (5) is connected with the reverse osmosis membrane assembly (7) and is used for recovering residual pressure energy of the high-pressure concentrated seawater after seawater desalination;
the low-pressure concentrated seawater outlet (103) of the cylinder body (5) is connected with the low-pressure concentrated seawater collecting box (2);
a low-pressure seawater inlet (104) of the cylinder body (5) is connected with the low-pressure seawater tank (1);
the cylinder body (5) high-pressure seawater outlet (102) is connected with the reverse osmosis membrane assembly (7) through the booster pump (6).
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| CN202321439170.0U CN219507715U (en) | 2023-06-07 | 2023-06-07 | Seawater desalination residual pressure energy recovery device and system |
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| CN202321439170.0U CN219507715U (en) | 2023-06-07 | 2023-06-07 | Seawater desalination residual pressure energy recovery device and system |
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| CN219507715U true CN219507715U (en) | 2023-08-11 |
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