NL2031443B1 - Onboard aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture - Google Patents

Onboard aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture Download PDF

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Publication number
NL2031443B1
NL2031443B1 NL2031443A NL2031443A NL2031443B1 NL 2031443 B1 NL2031443 B1 NL 2031443B1 NL 2031443 A NL2031443 A NL 2031443A NL 2031443 A NL2031443 A NL 2031443A NL 2031443 B1 NL2031443 B1 NL 2031443B1
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aquaculture
air chamber
pipeline
water
pressurization
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NL2031443A
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Dutch (nl)
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NL2031443A (en
Inventor
Zhang Bin
Li Jianxun
Shen Zhixin
Cui Mingchao
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Fishery Machinery & Instrument Res Inst Cafs
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

The present invention provides an onboard aquaculture system using ventilation and pressurization to achieve multi—layer aquaculture, wherein several relatively independent closed aquaculture air chambers are successively arranged from bottom. to top in an 5 onboard aquaculture compartment. Several groups of water inlet pipelines and water outlet pipelines are respectively arranged on a side wall of the onboard aquaculture compartment at different heights corresponding to respective aquaculture air chambers. One end of the water inlet pipeline and one end of the water outlet 10 pipeline are connected to the external water area, and the other ends are set in respective aquaculture air chambers. Taking the liquid level of the external water area as the boundary, these closed aquaculture air chambers are divided into a first aquaculture air chamber and a second aquaculture air chamber. 15 (+ Fig.)

Description

P1289/NLpd
ONBOARD AQUACULTURE SYSTEM USING VENTILATION AND PRESSURIZATION TO
ACHIEVE MULTI-LAYER AQUACULTURE
TECHNICAL FIELD
The present invention relates to the field of marine engi- neering and aquaculture technology, and provides an onboard aqua- culture system using ventilation and pressurization to achieve multi-layer aquaculture.
BACKGROUND ART
The aquaculture production mode in China is extensive. Af- fected by the deterioration of the external water environment and the deterioration of the internal water quality, the inland and coastal aquaculture spaces are squeezed, and the safety of aqua- culture products becomes increasingly prominent.
Going to the deep sea and carrying out marine aquaculture is an important way to meet the growing demand for aquatic product supply. Onboard aquaculture, especially deep-sea onboard aquacul- ture, has several obvious advantages, including: rich seawater re- sources and excellent water quality; rich marine life and sea re- sources, with long-term and stable development value; and high ca- pacity of sea aquaculture.
At present, the compartments of onboard aquaculture are gen- erally distributed in horizontal plane, which requires a high width of the hull, so that the lateral area of the hull is in- creased and the space utilization is not high.
SUMMARY
According to the present invention, a closed multi-layer com- partment aquaculture method is constructed, wherein the aquacul- ture compartments are vertically distributed in an upper and a lower direction. The exchange between the aquaculture water body and the external water is realized by a water pump in each aqua- culture compartment. An air chamber is provided above the liquid surface of each aquaculture compartment in order to facilitate ob-
servation and air exchange of the cultured variety. In order to reduce the power of the water pump and save energy, the pressure inside and outside the compartment is balanced by ventilating the alr chamber.
An onboard aquaculture system using ventilation and pressuri- zation to achieve multi-layer aquaculture, the closed onboard aq- uaculture system comprises an onboard aquaculture compartment ar- ranged in a water area. Several relatively independent closed aq- uaculture air chambers are successively arranged from bottom to top in the onboard aquaculture compartment. Several groups of wa- ter inlet pipelines and water outlet pipelines are arranged on a side wall of the onboard aquaculture compartment at different heights corresponding to the respective aquaculture air chambers.
Pumps are arranged on both the water inlet pipelines and the water outlet pipelines. One end of the water inlet pipeline and one end of the water outlet pipeline are connected to an external water area, and the other ends are arranged in the respective aquacul- ture air chambers. A water inlet end of the water outlet pipeline is arranged at a middle and upper part of the side wall of the aq- uaculture air chamber. A forced-discharge pipeline is further ar- ranged at a bottom of each aquaculture air chamber, the other end of the forced-discharge pipeline is connected to the water outlet pipeline, and a forced-discharge pump is arranged on the forced- discharge pipeline.
Taking the liquid level of the external water area as the boundary, these closed aquaculture air chambers are divided into an upper first aquaculture air chamber and a lower second aquacul- ture air chamber, wherein the first aquaculture air chamber is in communication with the atmosphere, and the internal air pressure of the second aquaculture air chamber is higher than the internal air pressure of the first aquaculture air chamber. The greater the depth of the second aquaculture air chamber, the greater the in- ternal air pressure.
Further, each second aquaculture air chamber has an internal air pressure control value of P=P +pgh, where By is the atmospheric pressure of the external water surface; # is the density of the water; & is the acceleration of gravity; and R is the height difference between the liquid level of the aquaculture compartment and the external water surface.
Furthermore, each second aquaculture air chamber is provided with a pressure regulation pipeline, wherein one end of the pres- sure regulation pipeline is in communication with the atmosphere and the other end is disposed at a top of the second aquaculture air chamber.
Furthermore, the pressure regulation pipeline is composed of a pressure release pipeline and a pressurization pipeline, wherein the pressure release pipeline is provided with a pressure release valve at one end in communication with the atmosphere, and the pressurization pipeline is provided with a booster pump at one end in communication with the atmosphere.
Furthermore, a liquid level sensor is provided on a side wall of each of the aquaculture air chambers with a preset maximum liq- uid level, and is connected to a pump on the water outlet pipe- line.
Furthermore, the pumps arranged on the water inlet pipeline and the water outlet pipeline of the same aquaculture air chamber are located on the same horizontal line.
The present invention adopts longitudinally distributed aqua- culture compartments, which reduces the occupied area on the hori- zontal plane. The number of aquaculture air chambers per unit area can be increased, conducive to increasing production. In addition, the width-depth ratio (ratio of width to depth) of the aquaculture compartment is rationally adjusted. The head of the water inlet pump can be reduced by means of ventilation and pressure mainte- nance, thereby reducing the pump power and saving energy consump- tion.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or prior art are briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained from these drawings without involving any in- ventive effort for a person skilled in the art.
FIGs. 1-2 show cross-sectional views of an onboard aquacul- ture system using ventilation and pressurization to achieve multi- layer aquaculture according to the present invention; and
FIG. 3 shows a cross-sectional view of FIG. 1 rotated 90 de- grees horizontally.
DETAILED DESCRIPTION OF THE EMBODIMENTS
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some technical features known in the art have not been described in order to avoid obscur- ing the present invention.
In the following description, detailed procedures and de- tailed structures are set forth in order to provide a thorough un- derstanding of the present invention. Preferred embodiments of the present invention are described in detail below, however, the pre- sent invention may have other embodiments in addition to these de- tailed descriptions.
As shown in FIGs. 1-3, the present invention provides an onboard aquaculture system using ventilation and pressurization to achieve multi-layer aguaculture. The closed onboard aquaculture system comprises an onboard aguaculture compartment 100 arranged in a water area. Several relatively independent closed aquaculture air chambers are successively arranged from bottom to top in the onboard aquaculture compartment 100. Several groups of water inlet pipelines and water outlet pipelines are arranged on a side wall of the onboard aquaculture compartment at different heights corre- sponding to the respective aquaculture air chambers. Pumps are ar- ranged on both the water inlet pipelines and the water outlet pipelines. One end of the water inlet pipeline and one end of the water outlet pipeline are connected to an external water area, and the other ends are arranged in the respective aquaculture air chambers. A water inlet end of the water outlet pipeline is ar- ranged at a middle and upper part of the side wall of the aquacul- ture air chamber. A forced-discharge pipeline is further arranged at a bottom of each aguaculture air chamber, the other end of the 5 forced-discharge pipeline is connected to the water outlet pipe- line, and a forced-discharge pump is arranged on the forced- discharge pipeline. Taking the liquid level of the external water area as the boundary, these closed aquaculture air chambers are divided into an upper first aguaculture air chamber 10 and a lower second aquaculture air chamber 20, wherein the first aquaculture alr chamber 10 is in communication with the atmosphere, and the internal air pressure of the second aquaculture air chamber 20 is higher than the internal air pressure of the first aguaculture air chamber 10. The greater the depth of the second aquaculture air chamber 20, the greater the internal air pressure.
The present invention adopts longitudinally distributed agua- culture compartments, which reduces the occupied area on the hori- zontal plane. The number of aguaculture air chambers per unit area can be increased, conducive to increasing production. In addition, the width-depth ratio (ratio of width to depth) of the aquaculture compartment is rationally adjusted. The head of the water inlet pump can be reduced by means of ventilation and pressure mainte- nance, thereby reducing the pump power and saving energy consump- tion.
In an alternative embodiment, each second aquaculture air chamber 20 has an internal air pressure control value of F=P+pgh . Where © is the atmospheric pressure of the external water sur- face; ¥ is the density of the water; & is the acceleration of gravity; and i is the height difference between the liquid level of the aquaculture compartment and the external water surface.
This makes the inner pressure of the second aguaculture air cham- ber 20 equal to the pressure at the water inlet or outlet when pumping or discharging water, which is advantageous for reducing the heads of the water inlet pump and the water outlet pump, thereby reducing the power of the water inlet and outlet pumps and saving energy. As shown in FIG. 2, it is shown that three aquacul- ture air chambers are provided in the onboard aquaculture compart- ment 100, and the lower two aquaculture air chambers are the sec- ond aguaculture air chambers 20. The difference in heights between the aquaculture compartment liquid levels of the two second aqua- culture air chambers 20 and the external water surface are h {m) and h (1), respectively.
In an alternative embodiment, each second aquaculture air chamber 20 is provided with a pressure regulation pipeline. One end of the pressure regulation pipeline is in communication with the atmosphere, and the other end is arranged at the top of the second aquaculture air chamber 20 to be in communication with a space 22 between the liquid level of the second aquaculture air chamber 20 and a roof. Preferably, the pressure regulation pipe- line is composed of a pressure release pipeline 27 and a pressuri- zation pipeline 22. The pressure release pipeline 27 is provided with a pressure release valve 28 at one end in communication with the atmosphere, and the pressurization pipeline 29 is provided with a booster pump at one end in communication with the atmos- phere
In an alternative embodiment, a liquid level sensor is pro- vided on the side wall of each aquaculture air chamber with a pre- set maximum liquid level, and is connected to a pump on the water outlet pipeline. When the liquid level submerges the liquid level sensor, the water outlet pump of the water outlet pipeline will automatically start to drain, so that the liquid level in each aq- uaculture air chamber is always below the preset height.
In the figures, taking the height of the aquaculture liquid level above and below the draft of the vessel as the dividing line, the aquaculture area is divided into two aquaculture areas of different control logics, i.e. upper and lower aguaculture are- as. With regard to each aquaculture air chamber (namely, a first aquaculture air chamber 10) of an upper aquaculture area, a first water inlet pump 11 on a first water inlet pipeline is used to ex- tract external water and inject same into the first aguaculture air chamber 10. When the liquid level in the first aguaculture air chamber 10 reaches a specified level, a first water outlet pump 13 on the first water outlet pipeline 14 is turned on, and excess wa- ter flows out of the compartment via the first water outlet pipe- line 14, so as to realize the water exchange between each aquacul- ture air chamber in the aquaculture area above the vessel's draft and the external water. When there are more feed residues and fe- ces after feeding or according to the requirements of the cultiva- tion process, the first forced-discharge pump 15 on the first forced-discharge pipeline 16 is started to force the sewage at the bottom of the first aquaculture air chamber 10 to be discharged out the compartment. Wherein the top of the first aquaculture air chamber 10 is provided with a ventilation hole, so that the space 12 between the liquid level of the first aquaculture air chamber 10 and the roof is directly connected to the atmosphere.
With regard to each aquaculture air chamber (namely, a second aguaculture air chamber 20) of a lower aquaculture area, a second water inlet pump 21 on a second water inlet pipeline is used to extract external water and inject same into the second aquaculture air chamber 20. When the liquid level in the second aquaculture air chamber 20 reaches a specified level, a second water outlet pump 23 on the second water outlet pipeline 24 is turned on, and excess water flows out of the compartment via the second water outlet pipeline 24, so as to realize the water exchange between each aquaculture air chamber in the aquaculture area above the vessel's draft and the external water. When there are more feed residues and feces after feeding or according to the requirements of the cultivation process, the second forced-discharge pump 25 on the second forced-discharge pipeline 26 is started to force the sewage at the bottom of the second aguaculture air chamber 20 to be discharged out the compartment.
In addition, each of the second aquaculture air chambers 20 is provided with a pressure regulation pipeline, and the internal pressure can be regulated according to the current depth of the second aquaculture air chamber 20. Specific adjustment formulas are referred to above and will not be repeated here. By strength- ening the internal air pressure of the second aquaculture air chamber 20, the inner pressure of the second aquaculture air cham- ber 20 is equal to the pressure at the water inlet or outlet when pumping or discharging water, which is advantageous for reducing the heads of the water inlet pump and the water outlet pump, thereby reducing the power of the water inlet and outlet pumps and saving energy.
Preferred embodiments of the present invention have been de- scribed above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in ordinary ways in the art. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possi- ble changes and modifications to the technical solution of the present invention by using the methods and technical contents dis- closed above, or modify them into equivalents of equivalent chang- es, this does not affect the essential content of the present in- vention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the protection scope of the technical solutions of the present invention.

Claims (4)

CONCLUSIESCONCLUSIONS 1. Aguacultuursysteem aan boord dat gebruik maakt van ventilatie en drukverhoging om een meerlaagse aquacultuur te bereiken, met het kenmerk, dat het gesloten aquacultuursysteem aan boord een aquacultuurcompartiment aan boord omvat dat in een watergebied is opgesteld; waarbij verschillende relatief onafhankelijke gesloten aquacultuurluchtkamers achtereenvolgens van onder naar boven zijn aangebracht in het aquacultuurcompartiment aan boord; waarbij ver- schillende groepen waterinlaatpijpleidingen en wateruitlaatpijp- leidingen zijn aangebracht op een zijwand van het aquacultuurcom- partiment aan boord op verschillende hoogten die overeenkomen met de respectieve aquacultuurluchtkamers; waarbij pompen zijn aange- bracht op zowel de waterinlaatleidingen als de wateruitlaatpijp- leidingen; waarbij één uiteinde van de waterinlaatpijpleiding en één uiteinde van de wateruitlaatpijpleiding zijn verbonden met een extern watergebied, en de andere uiteinden zijn aangebracht in de respectieve aquacultuurluchtkamers; waarbij een waterinlaateinde van de wateruitlaatpijpleiding is aangebracht bij een midden- en bovendeel van de zijwand van de aquacultuurluchtkamer; en waarbij een geforceerde afvoer-pijpleiding is verder aangebracht aan de onderkant van elke aquacultuurluchtkamer, het andere uiteinde van de geforceerde afvoer-pijpleiding is verbonden met de wateruit- laatpijpleiding, en waarbij een geforceerde afvoer-pomp is aange- bracht op de geforceerde afvoer-pijpleiding; waarbij indien het vloeistofniveau van het externe watergebied als grens wordt genomen, zijn deze gesloten aquacultuurluchtkamers verdeeld in een bovenste eerste aquacultuurluchtkamer en een on- derste tweede aquacultuurluchtkamer, waarbij de eerste aquacul- tuurluchtkamer in verbinding staat met de atmosfeer, en de de in- terne luchtdruk van de tweede aquacultuurluchtkamer hoger is dan de interne luchtdruk van de eerste aquacultuurluchtkamer; en waar- bij geldt dat hoe groter de diepte van de tweede aquacultuurlucht- kamer, hoe groter de interne luchtdruk.An on-board aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture, characterized in that the closed on-board aquaculture system includes an on-board aquaculture compartment arranged in a water area; several relatively independent closed aquaculture air chambers arranged sequentially from bottom to top in the aquaculture compartment on board; wherein different groups of water inlet pipelines and water outlet pipelines are arranged on a side wall of the on-board aquaculture compartment at different heights corresponding to respective aquaculture air chambers; wherein pumps are provided on both the water inlet piping and the water outlet piping; wherein one end of the water inlet pipeline and one end of the water outlet pipeline are connected to an external water area, and the other ends are arranged in respective aquaculture air chambers; wherein a water inlet end of the water outlet pipeline is arranged at a middle and upper part of the side wall of the aquaculture air chamber; and a forced discharge pipeline is further provided at the bottom of each aquaculture air chamber, the other end of the forced discharge pipeline is connected to the water outlet pipeline, and a forced discharge pump is provided on the forced discharge pipe pipeline; wherein if the liquid level of the external water area is taken as a boundary, these closed aquaculture air chambers are divided into an upper first aquaculture air chamber and a lower second aquaculture air chamber, the first aquaculture air chamber communicating with the atmosphere, and the internal air pressure of the second aquaculture air chamber is higher than the internal air pressure of the first aquaculture air chamber; and wherein the greater the depth of the second aquaculture air chamber, the greater the internal air pressure. 2. Aquacultuursysteem aan boord dat gebruik maakt van ventilatie en drukverhoging om meerlaagse aquacultuur te bereiken volgens conclusie 1, met het kenmerk, dat elke tweede aquacultuurluchtka- mer een interne luchtdrukregelwaarde heeft volgens PP tpi, I waarbij “s de atmosferische druk is van het externe wateroppervlak; B de dichtheid is van het water; & de zwaartekrachtsversnelling is; en het hoogteverschil is tussen het vloeistofniveau van het aquacultuurcompartiment en het externe wateroppervlak.An on-board aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture according to claim 1, characterized in that each second aquaculture air chamber has an internal air pressure control value according to PP tpi, I where 's is the atmospheric pressure of the external water surface; B is the density of the water; & is the gravitational acceleration; and is the height difference between the liquid level of the aquaculture compartment and the external water surface. 3. Aquacultuursysteem aan boord dat gebruik maakt van ventilatie en drukverhoging om meerlaagse aquacultuur te bereiken volgens conclusie 2, met het kenmerk, dat elke tweede aquacultuurluchtka- mer is voorzien van een drukregelleiding, waarbij één uiteinde van de drukregelleiding in verbinding staat met de atmosfeer en het andere uiteinde zich bovenaan de tweede aquacultuurluchtkamer be- vindt.An on-board aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture according to claim 2, characterized in that each second aquaculture air chamber is provided with a pressure regulating line, one end of the pressure regulating line communicating with the atmosphere and the other end is at the top of the second aquaculture air chamber. 4. Aquacultuursysteem aan boord dat gebruik maakt van ventilatie en drukverhoging om meerlaagse aquacultuur te bereiken volgens conclusie 3, met het kenmerk, dat de drukregelleiding is samenge- steld uit een drukaflaatleiding en een leiding voor het onder druk brengen, waarbij de drukaflaatleiding is voorzien van een drukaf- laatklep aan het ene uiteinde dat in communicatie staat met de at- mosfeer, en de leiding voor het onder druk brengen is voorzien van een boosterpomp aan één uiteinde dat in communicatie staat met de atmosfeer.An on-board aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture according to claim 3, characterized in that the pressure regulating line is composed of a pressure release line and a pressurization line, the pressure release line being provided with a pressure relief valve at one end in communication with the atmosphere, and the pressurization line is provided with a booster pump at one end in communication with the atmosphere.
NL2031443A 2022-03-29 2022-03-29 Onboard aquaculture system using ventilation and pressurization to achieve multi-layer aquaculture NL2031443B1 (en)

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NL2031443B1 true NL2031443B1 (en) 2023-03-28

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