CN203938503U - A kind of sea water desalinating plant and system thereof based on the infiltration and counter-infiltration of pressure retardation - Google Patents
A kind of sea water desalinating plant and system thereof based on the infiltration and counter-infiltration of pressure retardation Download PDFInfo
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- CN203938503U CN203938503U CN201420366114.3U CN201420366114U CN203938503U CN 203938503 U CN203938503 U CN 203938503U CN 201420366114 U CN201420366114 U CN 201420366114U CN 203938503 U CN203938503 U CN 203938503U
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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 kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation, comprise concentration difference power unit, sea water desaltination unit and be positioned at two pressure transmission devices between unit.Concentration difference power unit comprise seawater chamber of hollow and with it adjacent hollow concentrated seawater chamber and be positioned at the permeable membrane between two chambers, this unit is for being converted into static pressure by the salt error between the seawater of different concns.Sea water desaltination unit comprise No. two seawater chambeies of hollow and with it adjacent hollow fresh water chamber and be positioned at the reverse osmosis membrane that only allows water molecules to see through between two chambers, under static pressure, reverse osmosis membrane only allows water molecules to see through, thereby carries out sea water desaltination.Pressure transmission device can move or be out of shape, by self displacement or distortion and static pressure is passed to seawater chamber No. two.This apparatus structure compactness, only utilizes seawater salt error can carry out sea water desaltination, does not consume high-grade energy, environmental protection.
Description
Technical field
The utility model belongs to field of sea water desalting technology, is specifically related to a kind of sea water desalinating plant and system thereof based on the infiltration and counter-infiltration of pressure retardation of utilizing salt error energy.
Background technology
At present, a large amount of marine island and cay Freshwater resources are rare, and in the urgent need to utilizing desalination technology to prepare fresh water, the technology of traditional sea water desaltination mainly contains: seawater freezing method, electroosmose process, distillation method, reverse osmosis membrane.Wherein, distillation method and reverse osmosis membrane are main desalination methods, both rely on electric energy, tradition faces exhaustion for the coal oil-gas resource generating electricity, and electric energy cannot be sent to remote island, therefore utilize the desalination technology of electric energy can not adapt to remote island, utilize in the desalination technology of electric energy and need to use the power assist apparatus such as pump, cause the complex structure of its device, floor space is large, maintenance and running cost high.
Salt error can be the poor energy of the chemical potential between seawater and fresh water or between the seawater of two kinds of different concns, is a kind of renewable energy source of energy density maximum in sea energy, it is estimated, China coast salt error energy resource standing stock are about 3.9 × 10
15j.Pressure retardation infiltration (referred to as PRO) system based on semi-permeable membranes is one of mode of extracting at present salt error energy, reverse osmosis (being called for short RO) is the technology relative with PRO, under its pressure providing in the external world by ionic membrane by the solvent inverse osmosis in higher concentration seawater the opposite side to ionic membrane, can be for sea water desaltination.
At present, RO has developed into a kind of seawater (and brackish water) desalination techniques, but this reverse osmosis system working process needs extraneous pressure exerting device that pressure is provided, in traditional method, this pressure is to provide by electric energy, need to consume a large amount of high-grade energies, high and the contaminate environment of cost, is unfavorable for the mankind's Sustainable development.
Utility model content
For above defect or the Improvement requirement of prior art, the utility model provides a kind of sea water desalinating plant and system thereof based on the infiltration and counter-infiltration of pressure retardation of utilizing salt error energy, its object is the pressure retardation infiltration technology based on semi-permeable membranes (being called for short PRO) and reverse osmosis technology (being called for short RO) to combine cleverly, utilize PRO system to obtain static pressure for RO system provides propulsion source, recycle RO technology and carry out sea water desaltination.Solve thus the problem of utilizing RO technology to carry out sea water desaltination in traditional method need to consume high-grade energy.
For achieving the above object, according to an aspect of the present utility model, a kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation is provided, for utilizing the salt error of seawater to desalinate seawater, it is characterized in that, comprise concentration difference power unit and sea water desaltination unit, and be positioned between two unit for separating two unit and described concentration difference power unit pressure being passed to the pressure transmission device of described sea water desaltination unit, wherein
Concentration difference power unit, it comprise seawater chamber of hollow and with it adjacent hollow concentrated seawater chamber and be positioned between two chambers for separate two chambers and only allow that water molecules passes through permeable membrane, described concentration difference power unit is for being converted into static pressure by the salt error between the seawater of different concns;
Sea water desaltination unit, it comprise No. two seawater chambeies of hollow and with it adjacent hollow fresh water chamber and be positioned at the reverse osmosis membrane for separating two chambers and only allowing water molecules to pass through between two chambers, described sea water desaltination unit utilizes reverse osmosis membrane that water is separated with impurity under static pressure, carries out sea water desaltination;
Pressure transmission device, it is positioned between described concentrated seawater chamber and described No. two seawater chambeies, can move or be out of shape, for separating described concentrated seawater chamber and No. two seawater chambeies and the static pressure in concentrated seawater chamber being passed to described No. two seawater chambeies by self displacement or distortion;
While being full of respectively the seawater of different concns and concentrated seawater chamber maritime interior waters concentration higher than a seawater chamber maritime interior waters concentration in seawater chamber and concentrated seawater chamber, under the effect of osmotic pressure, in a seawater chamber, water molecules enters in concentrated seawater chamber through permeable membrane, concentrated seawater chamber internal volume increases and formation static pressure, by making pressure transmission device shift to No. two seawater chambeies of sea water desaltination unit, make to be subject to static pressure effect in No. two seawater chambeies and complete sea water desaltination.
Further, the wall close contact between described pressure transmission device and concentrated seawater chamber and No. two seawater chambeies, to form sealing, forms and leaks between concentrated seawater chamber and No. two seawater chambeies for preventing, it is preferably piston or the deformable pellosil of variable movement.
Further, the permeable membrane between a described seawater chamber and concentrated seawater chamber is fixed and supports by the first porous resistance to deformation retaining plate, to prevent that described permeable membrane from breaking under the salt error of different concns seawater can act on; Reverse osmosis membrane between described No. two seawater chambeies and fresh water chamber is fixed and supports by the second porous resistance to deformation retaining plate, to prevent displacement under the pressure-acting of described reverse osmosis membrane in No. two seawater chambeies.
Further, the first porous resistance to deformation plate is fixed on the wall between seawater chamber and concentrated seawater chamber, consumes static pressure to prevent it from moving under the maritime interior waters effect of concentrated seawater chamber; The second porous resistance to deformation plate is fixed on the wall between No. two seawater chambeies and fresh water chamber, consume pressure energy to prevent it from moving under No. two seawater chamber maritime interior waters effects, thereby ensure that the static pressure being provided by concentration difference power unit all acts on sea water desaltination unit.
Further, a described seawater chamber, described concentrated seawater chamber and described No. two seawater chambeies are all separately installed with inlet valve, outlet valve on the pipeline of two relative walls of chamber separately, to be respectively used to the inlet and outlet of seawater, shown in fresh water chamber only on an one wall pipeline, outlet valve is installed, for the discharge of fresh water obtaining.
According on the other hand of the present utility model, a kind of seawater desalination system is provided, it comprises that at least two devices as above connect mutually, wherein, the pipeline that installs outlet valve place, fresh water chamber described in the pipeline communication upper level at the inlet valve place, No. two seawater chambeies of installing described in next stage, obtains for seawater is carried out to multistage desalination the fresh water that purity is higher.
In general, the above technical scheme of conceiving by the utility model compared with prior art, can obtain following beneficial effect:
1, the utility model device only utilizes the salt error between different concns seawater can carry out sea water desaltination, compared with existing seawater desalination system, it is without using high-grade energy such as electric energy, the raw material of its preparing fresh is all taken from nature, there is not the problem of any contaminate environment, environmental protection, economic and practical.
2, the compact construction of the utility model device, without driving arrangements such as additional motor and pumps,, without high pressure original paper, there is not the safety problems such as blast and leakage in operation that can be steady in a long-term.
3, method for desalting seawater in the utility model, owing to only utilizing the salt error energy of different concns seawater, for the remote island that lacks power supply, it is not subject to the restriction of severe regional condition can carry out sea water desaltination, thereby can be people's the movable extending space in sea.
4, in the utility model method, salt error can be converted into static pressure energy by permeable membrane, static pressure can be converted into the power desalinizing seawater simultaneously, utilize to greatest extent salt error energy, utilize compared with mode with utilizing salt error to generate electricity in prior art to wait, the utility model method has improved the utilising efficiency of the salt error energy energy greatly.
Brief description of the drawings
Fig. 1 is the sea water desalinating plant structural representation that in the present embodiment, pressure transmission device is piston;
Fig. 2 is the sea water desalinating plant structural representation that in the present embodiment, pressure transmission device is pellosil.
In institute's drawings attached, identical Reference numeral is used for representing identical element or structure, wherein:
1-left side set collar 2-permeable membrane 3-the first porous resistance to deformation plate
Flange bolt 6-left side, flange 5-left side, 4-left side end cap
7-seawater inlet valve 8-concentrated seawater inlet valve 9-brackish water inlet valve
10-pressure transmission device 11-casing 12-right side end cap
13-right side flange bolt 14-reverse osmosis membrane 15-the second porous resistance to deformation plate
16-right side set collar 17-pipeline and casing weld seam 18-water outlet valve
19-brackish water outlet valve 20-concentrated seawater outlet valve 21-seawer outlet valve.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.In addition,, in each embodiment of described the utility model, involved technical characterictic just can combine mutually as long as do not form each other conflict.
If Fig. 1 and Fig. 2 are the sea water desalinating plants of the utility model embodiment, different is that in Fig. 1, pressure transmission device is piston, and in Fig. 2, pressure transmission device is pellosil.The arrow of the horizontal direction in Fig. 1 and Fig. 2 represents the infiltration direction of solvent, and at this, solvent is water.
In Fig. 1 and Fig. 2, all there are four chambers, be respectively as the chamber A in a seawater chamber, as the chamber B in concentrated seawater chamber, as the cavity C in No. two seawater chambeies and as the chamber D in fresh water chamber, four chambers have formed the internal space of casing 11, chamber A and chamber B and the permeable membrane 2 arranging between the two form concentration difference power unit, and cavity C and chamber D and the reverse osmosis membrane 14 arranging between the two form sea water desaltination unit.Wherein, the first porous resistance to deformation plate 3 is for supporting permeable membrane 2, and left side set collar 1 is for being fixed on the first porous resistance to deformation plate 3 left hand wall of casing 11.Same, the second porous resistance to deformation plate 15 is for supporting reverse osmosis membrane 14, and right side set collar 16 is for being fixed on the second porous resistance to deformation plate 15 on the right wall of casing 11.The quantity of left and right sides support set collar 1 and 16 is respectively two, two identical support set collars are stuck in the groove of casing, in figure, do not draw groove, but the utility model does not limit it for groove, it can also be other fixed form, be respectively used to the two ends of first, second porous resistance to deformation plate of the left and right sides to be fixed on the upper lower wall of casing by being stuck in groove, thereby the porous resistance to deformation plate of the left and right sides is fixedly secured on casing 11.
Between concentration difference power unit and sea water desaltination unit, be provided with pressure transmission device 10, for concentration difference power unit being utilized the obtainable static pressure of salt error pass to sea water desaltination unit, thereby make to utilize RO technology to make sea water desaltination unit under extraneous pressure-acting, carry out sea water desaltination.Pressure transmission device 10 is preferably movable piston or pellosil, but material, the structure formation of the utility model to pressure transmission device and do not limit with the fixed form of casing, if its can transmission of pressure and with the stopping property of casing better.
Left side welding flange 4 is to be welded on the web plate of box body wall for being tightly connected, it is fastening that itself and left side end cap 6 pass through left side flange bolt 5, in order to ensure stopping property, the two accompanies sealing-ring (sealing-ring does not draw in the drawings), has completed the sealing in the left side of casing.Same, right side welding flange is to be welded on the web plate of casing 11 walls for being tightly connected, it is fastening that itself and right side end cap 6 pass through right side flange bolt 13, in order to ensure stopping property, the two accompanies sealing-ring (sealing-ring does not draw in the drawings), has completed the sealing on casing right side.
On the wall of the both sides of chamber A place casing, device has seawater inlet duct and seawer outlet pipeline respectively, entering chamber A and discharging chamber A for seawater, seawater inlet valve 7 and seawer outlet valve 21 are housed respectively on seawater inlet duct and outlet conduit, to control respectively the switching of pipeline separately.Same, on the two side of the casing at chamber B place, device has concentrated seawater inlet duct and concentrated seawater outlet conduit respectively, entering chamber B and discharging chamber B for concentrated seawater, concentrated seawater inlet valve 8 and concentrated seawater outlet valve 20 are housed respectively on concentrated seawater inlet duct and concentrated seawater outlet conduit, to control respectively the switching of pipeline separately.Same, on the wall of the both sides of cavity C place casing, device has brackish water inlet duct and brackish water outlet conduit respectively, entering cavity C and discharging cavity C for brackish water, brackish water inlet valve 9 and brackish water outlet valve 19 are housed respectively on brackish water inlet duct and brackish water outlet conduit, to control respectively the switching of pipeline separately.Different from first three chamber, chamber D only has water outlet pipeline on the wall of casing one side, is provided with water outlet valve 18 on this pipeline, for discharging the fresh water of acquisition.In the utility model, seawater inlet valve 7 is normally open valve doors with water outlet valve 18, and other valves open and close as required.
In the present embodiment, 17 is pipeline and casing weld seam, and the inlet duct on tank wall and outlet pipe are realized and being connected with casing by welding, but its fixed form are not limited in the utility model.
The principle of work of the utility model device is:
In the time being full of respectively seawater, concentrated seawater in chamber A and chamber B, in the time there is concentration difference in both concentration, under the permeable membrane effect between chamber A and chamber B, solvent (in the present embodiment, solvent is water molecules) in the lower chamber A of solute concentration enters in the chamber B that solute concentration is higher by permeable membrane, the solvent entering in chamber B increases, result is that chamber B internal pressure increases, concentration step-down.
On the one hand, chamber B internal pressure causes seawater squeeze pressure transmitting element inner with it that its direction to sea water desaltination unit is moved after increasing, the brackish water pressurized of the cavity C that simultaneously makes to be positioned at pressure transmission device opposite side and contact with it, brackish water water molecules under pressure reduction can act on sees through reverse osmosis membrane and arrives chamber D, has completed sea water desaltination.
On the other hand, because the solvent in chamber B constantly increases, its concentration declines gradually, when the density loss of chamber B maritime interior waters to chamber A in the concentration of seawater while balancing each other, chamber A internal solvent no longer enters in chamber B, and the volume in chamber B no longer increases, and can not promote pressure transmission device to sea water desaltination single element move, sea water desaltination unit loses pressure-acting, cannot carry out reverse osmosis process.Now, need to change the seawater in chamber B or adopt other modes to increase chamber B maritime interior waters concentration and make it revert to the seawater that concentration is higher.
In the utility model, for the fresh water that makes to produce is purer, the device shown in Fig. 1 can be together in series step by step, the water outlet of upper level is connected with the brackish water entrance of next stage, so can improve the purity of fresh water.In the present embodiment, only provided one-level sea water desalinating plant, but in the utility model not the progression to desalting equipment limit, within apparatus and method that purer fresh water is produced in its series connection all belong to protection domain of the present utility model.
Application is when the utility model, and the seawater local concentration of seawater of serving as reasons determines, concentrated seawater is the seawater higher than solute concentration in seawater, and brackish water is the seawater lower than concentration of seawater.In the utility model, the concentration height of seawater is comparatively speaking, and not concrete regulation can be determined according to practical situation, in the utility model, does not specifically limit.
Application is when the utility model, and first the seawater in access to plant and brackish water remove silt wherein and the normal work of other granule foreign guarantee permeable membrane and reverse osmosis membrane through pre-treatment.In the utility model, seawater, concentrated seawater, brackish water pre-processing device all do not provide, and can select as required not only energy saving economy but also good pre-processing device.
When application the utility model, high-concentration and low-concentration seawater separately the definite of concentration has determined concentration difference between the two, and the height of concentration difference directly affects the effect of sea water desaltination, and concentration difference is larger in theory, the pressure difference that concentration difference power unit provides is larger, and the effect of sea water desaltination is better.The character of permeable membrane in using according to reality, determines concentration difference corresponding when this film work-ing life is longer, and particular case is actually comprehensively weighed and selects according to producing, and in the utility model, does not specifically limit.
When application the utility model, the high-concentration and low-concentration seawater separately volume size of corresponding chamber is recently determined by the volume of the rear final balance of infiltration according to the required pressure difference of sea water desaltination, high-concentration and low-concentration seawater, in the utility model, does not specifically limit.
Permeable membrane in the utility model, reverse osmosis membrane are chosen according to the concentration of both sides seawater separately, in the utility model, specifically do not limit.
In the utility model, bracing frame preferentially selects non-deformability strong, is difficult for by the material of sea-water corrosion, and the utility model does not specifically limit.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. the sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation, utilize the salt error of seawater can carry out sea water desaltination, it is characterized in that, it comprises concentration difference power unit and sea water desaltination unit, and be positioned at the pressure transmission device that passes to described sea water desaltination unit between two unit for the pressure energy of separating two unit and described concentration difference power unit is obtained, wherein
Concentration difference power unit, it comprise seawater chamber of hollow and with it adjacent hollow concentrated seawater chamber and be positioned at the permeable membrane between two chambers, because this permeable membrane exists, in the less seawater chamber of salinity, in seawater, water molecules can be penetrated in the concentrated seawater chamber that salinity is larger under salt error can act on, and because the compressibility of liquid is poor, concentrated seawater cavity pressure is increased, realize salt error energy osmotic pressure is converted into static pressure;
Pressure transmission device, it can move or be out of shape in the time that the static pressure in concentrated seawater chamber increases, thereby described static pressure is passed to described sea water desaltination unit;
Sea water desaltination unit, it comprise No. two seawater chambeies of hollow and with it adjacent hollow fresh water chamber and be arranged between two chambers for separating two chambers and only allowing the water molecules of No. two seawater chamber maritime interior waters to be penetrated into the reverse osmosis membrane in fresh water chamber, thereby described No. two seawater chambeies are subject to described static pressure effect to make water molecules in No. two seawater in seawater chamber enter fresh water chamber by described reverse osmosis membrane, realize sea water desaltination.
2. a kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation as claimed in claim 1, it is characterized in that, described pressure transmission device is preferably movable piston or deformable pellosil, its between concentrated seawater chamber and No. two seawater chambeies for transmission of pressure.
3. a kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation as claimed in claim 1, is characterized in that,
Permeable membrane between a described seawater chamber and concentrated seawater chamber is fixed and supports by the first porous resistance to deformation retaining plate, to prevent that described permeable membrane from moving or breaking under the salt error of different concns seawater can act on;
Described the first porous resistance to deformation retaining plate is fixed between seawater chamber and concentrated seawater chamber, consumes static pressure to prevent it from moving under the maritime interior waters effect of concentrated seawater chamber.
4. a kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation as claimed in claim 1, is characterized in that,
Reverse osmosis membrane between described No. two seawater chambeies and fresh water chamber is fixed and supports by the second porous resistance to deformation retaining plate, moves or breaks preventing under the pressure-acting of described reverse osmosis membrane in No. two seawater chambeies;
Described the second porous resistance to deformation plate is fixed between No. two seawater chambeies and fresh water chamber, consumes static pressure to prevent it from moving under No. two seawater chamber maritime interior waters effects, thereby ensures that the static pressure being provided by concentration difference power unit all acts on sea water desaltination.
5. a kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation as claimed in claim 1, it is characterized in that, a described seawater chamber, described concentrated seawater chamber and described No. two seawater chambeies are all provided with pipeline on two relative walls of chamber separately, and on the pipeline of relative two walls, be separately installed with inlet valve, outlet valve, to be respectively used to the inlet and outlet of seawater, described fresh water chamber is only provided with pipeline at an one wall, and on this pipeline, outlet valve is installed, the discharge of the fresh water obtaining for sea water desaltination.
6. a seawater desalination system, it comprises that at least two sea water desalinating plants as described in one of claim 1-5 connect mutually, wherein, the pipeline at the outlet valve place, fresh water chamber of installing described in the pipeline communication upper level at the inlet valve place, No. two seawater chambeies of the device described in the next stage that series connection forms, obtains for carrying out multistage seawater desalting the fresh water that purity is higher.
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| CN201420366114.3U CN203938503U (en) | 2014-07-02 | 2014-07-02 | A kind of sea water desalinating plant and system thereof based on the infiltration and counter-infiltration of pressure retardation |
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| CN201420366114.3U CN203938503U (en) | 2014-07-02 | 2014-07-02 | A kind of sea water desalinating plant and system thereof based on the infiltration and counter-infiltration of pressure retardation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098158A (en) * | 2014-07-02 | 2014-10-15 | 华中科技大学 | Sea water desalination device based on pressure retardation osmosis and reverse osmosis and method thereof |
| CN107155972A (en) * | 2017-06-21 | 2017-09-15 | 厦门中研融源科技有限公司 | A kind of fresh water seawater method for transformation and cyclic utilization system |
| CN110272171A (en) * | 2019-07-25 | 2019-09-24 | 江南大学 | A kind of sewage-treatment plant and method of synchronous recycle-water and electric energy |
| WO2020146957A1 (en) | 2019-01-18 | 2020-07-23 | Investigaciones Forestales Bioforest S.A. | Industrial salinity gradient battery and associated method |
| CN112408548A (en) * | 2020-10-20 | 2021-02-26 | 浙江省海洋水产养殖研究所 | Water desalination device for large-scale seedling cultivation of litopenaeus vannamei |
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2014
- 2014-07-02 CN CN201420366114.3U patent/CN203938503U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098158A (en) * | 2014-07-02 | 2014-10-15 | 华中科技大学 | Sea water desalination device based on pressure retardation osmosis and reverse osmosis and method thereof |
| CN104098158B (en) * | 2014-07-02 | 2016-04-13 | 华中科技大学 | A kind of sea water desalinating plant based on the infiltration and counter-infiltration of pressure retardation and method thereof |
| CN107155972A (en) * | 2017-06-21 | 2017-09-15 | 厦门中研融源科技有限公司 | A kind of fresh water seawater method for transformation and cyclic utilization system |
| WO2020146957A1 (en) | 2019-01-18 | 2020-07-23 | Investigaciones Forestales Bioforest S.A. | Industrial salinity gradient battery and associated method |
| CN110272171A (en) * | 2019-07-25 | 2019-09-24 | 江南大学 | A kind of sewage-treatment plant and method of synchronous recycle-water and electric energy |
| CN112408548A (en) * | 2020-10-20 | 2021-02-26 | 浙江省海洋水产养殖研究所 | Water desalination device for large-scale seedling cultivation of litopenaeus vannamei |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20200702 |