CN219570279U - Airbag type residual pressure energy recovery device and sea water desalination system - Google Patents
Airbag type residual pressure energy recovery device and sea water desalination system Download PDFInfo
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- CN219570279U CN219570279U CN202321439301.5U CN202321439301U CN219570279U CN 219570279 U CN219570279 U CN 219570279U CN 202321439301 U CN202321439301 U CN 202321439301U CN 219570279 U CN219570279 U CN 219570279U
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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 an air bag type residual pressure energy recovery device and a sea water desalination system, wherein the device comprises: a core, a left air bag and a right air bag; a cavity is arranged in the core body; one end of the left air bag extends into the cavity, and the other end of the left air bag is provided with a through port for seawater to enter and exit; one end of the right air bag extends into the cavity, and the other end of the right air bag is provided with a through port for seawater to enter and exit; the left air bag is abutted with the right air bag, and the left air bag and the right air bag can be arranged in an expanding mode. In the process of collecting the seawater residual pressure energy, the left air bag and the right air bag are mutually extruded, so that the transfer of the seawater pressure can be realized, and the recovery of the residual pressure energy can be realized; through the mutual extrusion mode of left gasbag and right gasbag, can avoid fluid to mix or leak in the residual pressure energy transmission process to can further improve residual pressure energy recovery efficiency.
Description
Technical Field
The utility model relates to the technical field of seawater recovery, in particular to an air bag type residual pressure energy recovery device and a seawater desalination system.
Background
Currently, fresh water resource shortages have become a common challenge worldwide. The coastline of China is as long as 1.8 ten thousand kilometers, and the sea water resources are rich. Seawater desalination technology is widely considered as one of the effective ways to solve the problem of shortage of fresh water resources.
At present, three main technologies for successfully achieving commercial application in the field of sea water desalination are as follows: multistage flash evaporation, low-temperature multi-effect distillation and reverse osmosis, wherein the reverse osmosis method has the most widely applied method due to the greatly improved performance of the reverse osmosis membrane, reduced energy consumption and cost.
Under different conditions, the reverse osmosis sea water desalination system needs high pressure of 5.8-8.0 MPa to maintain operation, and the residual pressure energy of high-pressure concentrated sea water discharged from the membrane component still reaches 5.5-6.0 MPa, so that the residual pressure energy has great recycling value.
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 efficiency is higher than that of the centrifugal type, and is also popular in the market. The existing positive displacement residual pressure energy recovery device generally realizes the transmission of residual pressure energy by adopting mixed liquid (liquid piston) or rod-type piston, but the two modes can not completely isolate different fluids, and a small amount of fluid is mixed or leaked in the residual pressure energy transmission process, so that the residual pressure energy recovery efficiency is reduced.
Disclosure of Invention
Therefore, the utility model aims to provide an air bag type residual pressure energy recovery device and a seawater desalination system, which are used for improving the recovery efficiency of the seawater residual pressure energy recovery device.
To achieve the above object, a first aspect of the present utility model provides an air bag type residual pressure energy recovery device, including: a core, a left air bag and a right air bag;
a cavity is arranged in the core body;
one end of the left air bag extends into the cavity, and the other end of the left air bag is provided with a through port for seawater to enter and exit;
one end of the right air bag extends into the cavity, and the other end of the right air bag is provided with a through port for seawater to enter and exit;
the left air bag is abutted with the right air bag, and the left air bag and the right air bag can be arranged in an expanding mode.
Further, the core body is provided with: a high pressure concentrated seawater inlet, a low pressure concentrated seawater outlet, a low pressure seawater inlet and a high pressure seawater outlet;
the other end of the left air bag is communicated with the high-pressure concentrated seawater inlet and the low-pressure concentrated seawater outlet;
the other end of the right air bag is communicated with the low-pressure seawater inlet and the high-pressure seawater outlet.
Further, a first valve is arranged on the high-pressure concentrated seawater inlet;
the low-pressure concentrated seawater outlet is provided with a second valve;
a third valve is arranged on the low-pressure seawater inlet;
and a fourth valve is arranged on the high-pressure seawater outlet.
Further, the first valve and the second valve are controlled through a two-position three-way electromagnetic valve, so that the first valve and the second valve are alternately opened and closed.
The second aspect of the utility model provides a sea water desalination system, comprising the airbag type residual pressure energy recovery device.
Further, the method further comprises the following steps: reverse osmosis sea water desalination membrane group, fresh water collecting box, low-pressure concentrated sea water collecting box, low-pressure pump, sea water tank, high-pressure pump and booster pump;
the reverse osmosis seawater desalination membrane group and the low-pressure concentrated seawater collection box are respectively connected with the other end of the left air bag in the air bag type residual pressure energy recovery device;
the reverse osmosis sea water desalination membrane group is connected with the other end of the right air bag in the air bag type residual pressure energy recovery device through a booster pump;
the seawater tank is connected with the other end of the right air bag through a low-pressure pump, and is connected with the reverse osmosis seawater desalination membrane group through a high-pressure pump;
the fresh water collecting box is connected with the reverse osmosis sea water desalination membrane group.
According to the technical scheme, the utility model provides an air bag type residual pressure energy recovery device and a seawater desalination system, wherein the device comprises: a core, a left air bag and a right air bag; a cavity is arranged in the core body; one end of the left air bag extends into the cavity, and the other end of the left air bag is provided with a through port for seawater to enter and exit; one end of the right air bag extends into the cavity, and the other end of the right air bag is provided with a through port for seawater to enter and exit; the left air bag is abutted with the right air bag, and the left air bag and the right air bag can be arranged in an expanding mode. In the process of collecting the seawater residual pressure energy, the left air bag and the right air bag are mutually extruded, so that the transfer of the seawater pressure can be realized, and the recovery of the residual pressure energy can be realized; through the mutual extrusion mode of left gasbag and right gasbag, can avoid fluid to mix or leak in the residual pressure energy transmission process to can further improve residual pressure energy recovery efficiency.
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 an overall schematic diagram of an airbag type residual pressure energy recovery device according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of an initial state of residual pressure energy recovery of an airbag type residual pressure energy recovery device according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of a residual pressure energy recovery end state of an air bag type residual pressure energy recovery device according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of the overall structure of a seawater desalination system according to an embodiment of the present utility model;
in the figure:
the device comprises a right air bag 1-1, a left air bag 1-2, a core body 1-3, a first valve 1-4, a second valve 1-5, a third valve 1-6, a fourth valve 1-7 and a two-position three-way electromagnetic valve 1-8;
a high-pressure concentrated seawater inlet 2-1, a low-pressure concentrated seawater outlet 2-2, a low-pressure seawater inlet 2-3 and a high-pressure seawater outlet 2-4;
the reverse osmosis seawater desalination membrane group 3-1, the fresh water collection box 3-2, the low-pressure concentrated seawater collection box 3-3, the low-pressure pump 3-4, the seawater box 3-5, the high-pressure pump 3-6 and the booster pump 3-7.
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, a first aspect of the present utility model provided in an embodiment of the present utility model provides an air bag type residual pressure energy recovery device, including: the left airbag 1-2 and the right airbag 1-1 are connected with the left airbag 1-3 and the right airbag 1-3; a cavity is arranged in the core body 1-3; one end of the left air bag 1-2 extends into the cavity, and the other end is provided with a through port for seawater to enter and exit; one end of the right air bag 1-1 extends into the cavity, and the other end is provided with a through port for seawater to enter and exit; the left air bag 1-2 is abutted with the right air bag 1-1, and the left air bag and the right air bag can be arranged in an inflatable mode.
In the process of recovering residual pressure energy of seawater, low-pressure seawater can be introduced into one air bag, for example, the low-pressure seawater enters the right air bag 1-1 through a port of the right air bag 1-1, then the port of the right air bag 1-1 is closed, and high-pressure concentrated seawater enters the left air bag 1-2 through a port of the left air bag 1-2, so that the left air bag 1-2 extrudes and compresses the right air bag 1-1, and the pressure of the high-pressure concentrated seawater is transferred to the low-pressure seawater, thereby realizing the recovery and utilization of the residual pressure energy of the high-pressure concentrated seawater; after the low-pressure seawater in the right air bag 1-1 is compressed into high-pressure seawater, the through port of the right air bag 1-1 is opened to enable the seawater in the right air bag to flow out.
In the process of recovering the seawater residual pressure energy, the fluid cannot leak or mix in the residual pressure energy transmission process, so that the residual pressure energy can be more effectively utilized, and the residual pressure energy recovery efficiency is improved.
In a more specific embodiment, referring to fig. 2 and 3, the core 1-3 is provided with: a high-pressure concentrated seawater inlet 2-1, a low-pressure concentrated seawater outlet 2-2, a low-pressure seawater inlet 2-3 and a high-pressure seawater outlet 2-4; the other end of the left air bag 1-2 is communicated with a high-pressure concentrated seawater inlet 2-1 and a low-pressure concentrated seawater outlet 2-2; the other end of the right air bag 1-1 is communicated with a low-pressure seawater inlet 2-3 and a high-pressure seawater outlet 2-4.
Wherein, the high-pressure concentrated seawater inlet 2-1 is provided with a first valve 1-4; the low-pressure concentrated seawater outlet 2-2 is provided with a second valve 1-5; the low-pressure seawater inlet 2-3 is provided with a third valve 1-6; the high-pressure seawater outlet 2-4 is provided with a fourth valve 1-7. That is, in the present embodiment, the opening and closing of each of the seawater inlet and the seawater outlet is controlled by a valve. The fourth valve 1-7 may be a pressure limiting valve that opens automatically after reaching a preset pressure.
The specific workflow may be as follows:
as shown in fig. 2, low-pressure seawater enters the right air bag 1-1 through the third valve 1-6 of the low-pressure seawater inlet 2-3, and simultaneously the second valve 1-5 is opened to discharge the low-pressure concentrated seawater after the pressure relief of the previous cycle in the left air bag 1-2 from the second valve 1-5 of the low-pressure concentrated seawater outlet 2-2; at this time, the first valve 1-4 is in a closed state, and the fourth valve 1-7 is also in a closed state because the low-pressure seawater in the right air bag 1-1 does not reach the pressure threshold.
As shown in FIG. 2, when the right air bag 1-1 is filled with low pressure seawater and the left air bag 1-2 is drained of low pressure concentrated seawater, the first valve 1-4 is opened and the second valve 1-5 is closed.
Then, referring to fig. 3, high-pressure concentrated seawater enters the left air bag 1-2 through the first valve 1-4 of the high-pressure concentrated seawater inlet 2-1, so that the left air bag 1-2 extrudes the right air bag 1-1 to boost the low-pressure seawater into high-pressure seawater. When the pressure of seawater in the right air bag 1-1 reaches the set pressure threshold, the fourth valve 1-7 is opened to discharge high-pressure seawater through the high-pressure seawater outlet 2-4, so that the recovery and utilization of residual pressure energy are realized. After the high-pressure seawater is discharged, the first valve 1-4 is closed, and the fourth valve 1-7 is automatically closed due to pressure drop. At this time, the low-pressure seawater enters the right air bag 1-1 again through the third valve 1-6, and enters the next working cycle.
Compared with the traditional positive displacement residual pressure energy recovery device, the scheme realizes complete isolation of two pressure exchange fluids during fluid pressure transmission, avoids mixing and leakage between the liquids, reduces the pressure loss in the pressure transmission process, and effectively improves the residual pressure energy recovery efficiency.
In another embodiment, the first valve 1-4 and the second valve 1-5 are controlled by two-position three-way electromagnetic valve 1-8, so that the first valve 1-4 and the second valve 1-5 are alternately opened and closed, that is, when the first valve 1-4 is opened, the second valve 1-5 is correspondingly closed; correspondingly, when the second valve 1-5 is opened, the first valve 1-4 is closed accordingly.
The second aspect of the utility model provides a sea water desalination system comprising the airbag type residual pressure energy recovery device of any one of the above.
In a more specific embodiment, referring to fig. 4, the above-mentioned sea water desalination system further comprises: the reverse osmosis seawater desalination membrane group 3-1, the fresh water collection box 3-2, the low-pressure concentrated seawater collection box 3-3, the low-pressure pump 3-4, the seawater box 3-5, the high-pressure pump 3-6 and the booster pump 3-7; the reverse osmosis sea water desalination membrane group 3-1 and the low-pressure concentrated sea water collection box 3-3 are respectively connected with the other end of the left air bag 1-2 in the air bag type residual pressure energy recovery device; the reverse osmosis sea water desalination membrane group 3-1 is connected with the other end of the right air bag 1-1 in the air bag type residual pressure energy recovery device through a booster pump 3-7; the seawater tank 3-5 is connected with the other end of the right air bag 1-1 through a low pressure pump 3-4, and is connected with the reverse osmosis seawater desalination membrane group 3-1 through a high pressure pump 3-6; the fresh water collecting box 3-2 is connected with the reverse osmosis sea water desalination membrane group 3-1.
Specifically, the first valve 1-4 and the second valve 1-5 are connected with the reverse osmosis sea water desalination membrane group 3-1 and the low-pressure concentrated sea water collecting box 3-3 through a two-position three-way electromagnetic valve 1-8. The fourth valve 1-7 on the high-pressure seawater outlet 2-4 is connected with the reverse osmosis seawater desalination membrane group 3-1 through the booster pump 3-7. The seawater tank 3-5 is connected with a third valve 1-6 on the low-pressure seawater inlet 2-3 through a low-pressure pump 3-4, and the seawater tank 3-5 is connected with a reverse osmosis seawater desalination membrane group 3-1 through a high-pressure pump 3-6.
When the system works, the high-pressure pump 3-6 pumps seawater in the seawater tank 3-5 into the reverse osmosis seawater desalination membrane group 3-1, and the seawater is separated into fresh water and high-pressure concentrated seawater by the action of reverse osmosis pressure difference, and the fresh water flows into the fresh water collecting tank 3-2; the high-pressure concentrated seawater enters the left air bag 1-2 from the high-pressure concentrated seawater inlet 2-1, compresses the low-pressure seawater in the right air bag 1-1 to be pressurized into high-pressure seawater, and is discharged from the high-pressure seawater outlet 2-4 after the pressure reaches a set pressure threshold. The discharged high-pressure seawater is further pressurized by a booster pump 3-7 and is injected into the reverse osmosis seawater desalination membrane group 3-1 together with the high-pressure seawater pumped by the high-pressure pump 3-6. After the high-pressure seawater is discharged, the low-pressure seawater in the seawater tank 3-5 is pumped into the right air bag 1-1 from the low-pressure seawater inlet 2-3 through the low-pressure pump 3-4, and the left air bag 1-2 is pushed and pushed, so that the low-pressure concentrated seawater is discharged from the low-pressure concentrated seawater outlet 2-2 into the low-pressure concentrated seawater collecting tank 3-3, and one working cycle is completed.
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 (6)
1. An airbag type residual pressure energy recovery device, characterized by comprising: the air bag comprises a core body (1-3), a left air bag (1-2) and a right air bag (1-1);
a cavity is arranged in the core body (1-3);
one end of the left air bag (1-2) extends into the cavity, and the other end is provided with a through hole for seawater to enter and exit;
one end of the right air bag (1-1) extends into the cavity, and the other end is provided with a through hole for seawater to enter and exit;
the left air bag (1-2) is abutted with the right air bag (1-1) and can be arranged in an expanding mode.
2. The airbag type residual pressure energy recovery device according to claim 1, wherein the core (1-3) is provided with: a high-pressure concentrated seawater inlet (2-1), a low-pressure concentrated seawater outlet (2-2), a low-pressure seawater inlet (2-3) and a high-pressure seawater outlet (2-4);
the other end of the left air bag (1-2) is communicated with the high-pressure concentrated seawater inlet (2-1) and the low-pressure concentrated seawater outlet (2-2);
the other end of the right air bag (1-1) is communicated with the low-pressure seawater inlet (2-3) and the high-pressure seawater outlet (2-4).
3. The airbag type residual pressure energy recovery device according to claim 2, wherein a first valve (1-4) is arranged on the high-pressure concentrated seawater inlet (2-1);
the low-pressure concentrated seawater outlet (2-2) is provided with a second valve (1-5);
a third valve (1-6) is arranged on the low-pressure seawater inlet (2-3);
the high-pressure seawater outlet (2-4) is provided with a fourth valve (1-7).
4. An air bag type residual pressure energy recovery device according to claim 3, wherein the first valve (1-4) and the second valve (1-5) are controlled by a two-position three-way electromagnetic valve (1-8) so that the first valve (1-4) and the second valve (1-5) are alternately opened and closed.
5. A seawater desalination system comprising the air bag type residual pressure energy recovery device according to any one of claims 1 to 4.
6. The seawater desalination system of claim 5, further comprising: the reverse osmosis seawater desalination membrane group (3-1), a fresh water collection box (3-2), a low-pressure concentrated seawater collection box (3-3), a low-pressure pump (3-4), a seawater box (3-5), a high-pressure pump (3-6) and a booster pump (3-7);
the reverse osmosis seawater desalination membrane group (3-1) and the low-pressure concentrated seawater collection box (3-3) are respectively connected with the other end of the left air bag (1-2) in the air bag type residual pressure energy recovery device;
the reverse osmosis sea water desalination membrane group (3-1) is connected with the other end of the right air bag (1-1) in the air bag type residual pressure energy recovery device through a booster pump (3-7);
the seawater tank (3-5) is connected with the other end of the right air bag (1-1) through a low-pressure pump (3-4), and is connected with the reverse osmosis seawater desalination membrane group (3-1) through a high-pressure pump (3-6);
the fresh water collecting box (3-2) is connected with the reverse osmosis sea water desalination membrane group (3-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321439301.5U CN219570279U (en) | 2023-06-07 | 2023-06-07 | Airbag type residual pressure energy recovery device and sea water desalination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321439301.5U CN219570279U (en) | 2023-06-07 | 2023-06-07 | Airbag type residual pressure energy recovery device and sea water desalination system |
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| Publication Number | Publication Date |
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| CN219570279U true CN219570279U (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321439301.5U Active CN219570279U (en) | 2023-06-07 | 2023-06-07 | Airbag type residual pressure energy recovery device and sea water desalination system |
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| CN (1) | CN219570279U (en) |
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2023
- 2023-06-07 CN CN202321439301.5U patent/CN219570279U/en active Active
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