WO2019172777A1 - Moyen pour l'élimination de gaz et de particules d'un liquide et/ou de transfert d'un liquide - Google Patents

Moyen pour l'élimination de gaz et de particules d'un liquide et/ou de transfert d'un liquide Download PDF

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Publication number
WO2019172777A1
WO2019172777A1 PCT/NO2019/050051 NO2019050051W WO2019172777A1 WO 2019172777 A1 WO2019172777 A1 WO 2019172777A1 NO 2019050051 W NO2019050051 W NO 2019050051W WO 2019172777 A1 WO2019172777 A1 WO 2019172777A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
pipe section
venting
pipeline
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/NO2019/050051
Other languages
English (en)
Inventor
Morten Aga
Eldar Lien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Searas AS
Original Assignee
Searas AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NO20180333A external-priority patent/NO344276B1/no
Application filed by Searas AS filed Critical Searas AS
Publication of WO2019172777A1 publication Critical patent/WO2019172777A1/fr
Anticipated expiration legal-status Critical
Priority to NO20201080A priority Critical patent/NO20201080A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0036—Flash degasification
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • 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
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation

Definitions

  • Title Means for removing gases and particles from a liquid, and/or for transfer of a liquid.
  • the present invention relates to a device for removal of gases and particles from a liquid and/or for transport of a liquid.
  • Water treatment is necessary in many other instances, such as treatment of effluent, for example.
  • the solution that is provided is partly based on the syphon principle and the establishing of a negative pressure in a section of a pipeline and in this way one can also transport a liquid from one container to another.
  • the present invention relates to a device for removal of gases from a liquid and/or for removal of foam and particles from a liquid and/or for transport of a liquid, characterised in that the device is comprised of pipelines to transport the liquid from a first liquid volume A to a second liquid volume B, where the pipeline is comprised of a first upstream pipe section for intake of liquid, and a pipe section in the main horizontal, a downstream pipe section to lead the liquid out of the pipeline and a venting pipe section to lead the gases and part of the liquid out of the pipeline and that arranged in a downstream pipe section or in the transition to the downstream pipe section and venting pipe section is a venting section and that in the upstream pipe section and/or the horizontal pipe section means are arranged for the supply of micro bubbles to the pipeline and that in the pipeline there are means to establish a negative pressure in parts of the pipeline.
  • injection means in the pipeline for the supply of gases to the pipeline.
  • the injector means are arranged in a horizontal pipe section.
  • the injector means are arranged in an upstream pipe section.
  • the diameters of the downstream pipe section and the venting pipe section are set up as well as the degree of negative pressure in the pipeline so that one can decide on the percentage of the liquid that is led out via the venting pipe section.
  • a pumping device to pump liquid in via an upstream pipe section or a horizontal pipe section is also arranged.
  • venting section is in the form of an extended, horizontal pipe section.
  • the upstream pipe section and/or the horizontal pipe section is comprised of a ring with openings set up for passive sucking in of air to the liquid stream that is led through the horizontal pipe section.
  • upstream pipe section and/or the pumping means of the horizontal pipe section are set up for injection of liquid to said pipe sections.
  • the device is comprised of one or more pipe sections for the supply of liquid to one or more venting sections and venting pipe sections.
  • these are set up at different vertical positions in the upstream pipe section.
  • gases and liquid are led via several venting sections to the same pipe section.
  • the different horizontal pipe sections have different lengths, such that the liquid that is led out via the downstream pipe sections is moved to different liquid volumes or to different positions in the liquid volume.
  • downstream pipe section is angled so that flow is established in the liquid volume.
  • gases and liquid are led via the venting section to different venting pipe sections.
  • gases and liquid that are led out via the venting pipe section are taken to one or more further device(s) comprised of a horizontal pipe section, venting section, venting pipe section and downstream pipe section.
  • the first liquid volume A is a net cage and the second liquid volume B is a different net cage.
  • the first liquid volume A is one segment of a net cage and the second liquid volume B is a different segment of the net cage.
  • said first and second water volumes are the same water volume.
  • said pumping device is a propeller pump or an ejector pump.
  • said means for establishing a negative pressure is a vacuum pump or a fan.
  • the venting section has a given volume that ensures a large liquid:gas interfacial area and that the liquid circulates slowly via the pipeline so that a reduced amount of gas follows the liquid via the downstream pipe section to the second liquid volume B.
  • a cyclone that separates gases from a liquid is attached to the venting section via the pipe section and means to establish a negative pressure in the cyclone and the venting section are arranged to the upper part of the cyclone.
  • the device is arranged in an installation for farming of marine organisms.
  • the device is arranged in a net cage and that the net cage is comprised of a float collar that holds the unit afloat in a net cage installation.
  • the liquid flow through the device is completely or partially caused by a supply of air from an injector so that the liquid column in the upstream pipe section is made to be lighter than in the downstream pipe section.
  • the device is arranged in an installation for treatment of waste water.
  • means are arranged for supplying oxygen in the pipeline so that the oxygen is supplied to the liquid before the outlet via the downstream pipe section.
  • the negative pressure in the pipeline and the cyclone is sufficient to lead foam and smaller particles with the gas/liquid flow out of the pipeline.
  • liquid level A and the liquid level B are different that the throughflow of water in the pipeline is completely or partially driven by the difference in the levels.
  • larger units such as fish are transported with the liquid flow out of the downstream pipe section.
  • Figure 1 shows schematically an embodiment of a device for removal of gases that are transported via a pipeline.
  • Figure 2 shows schematically an embodiment of a device with an expanded venting section for the removal of gases from a liquid. The liquid is recirculated back to the container it was brought from.
  • Figure 3 shows schematically the same embodiment as in figure 2, but where the liquid is transported to a different container than the one from which it was collected.
  • Figure 4 shows an embodiment where several horizontal pipe sections are coupled to an upstream pipe section.
  • Figure 5 shows an embodiment where several devices are coupled after each other.
  • Figure 1 shows a first embodiment of the invention.
  • a first liquid volume A one or more pipelines 16 are incorporated to circulate water from a first liquid volume A to a second liquid volume B.
  • the pipelines 16 have an upstream pipe section 16a that extends from the first liquid volume A and, in the main, vertically upwards to above the surface level of the first liquid volume A and this upstream pipe section 16a is used for the intake of liquid to the pipeline 16.
  • the upstream pipe section 16a is in fluid communication with a horizontal pipe section 16b. It is preferred that this pipe section 16b is made to be tilting or, in the main, horizontal. Downstream of the horizontal pipe section 16 the liquid is transported further through a downstream pipe section 16c. This downstream pipe section 16c is, in the main, arranged vertically and carries the liquid out of the pipeline 16.
  • the horizontal pipe section 16b can, in some preferred embodiments, be of a substantial length so that the liquid is transported a considerable distance.
  • an injector 17 Arranged in a part of the upstream pipe section 16a or the horizontal pipe section 16b is an injector 17.
  • the injector 17 supplies micro bubbles of gas, preferably air, to the pipeline 16.
  • the micro bubbles that are transported through the pipeline 16 together with the liquid from the liquid volume A will lead to the gases and smaller particles that are dissolved in the liquid volume A to seek the micro bubbles. For example, if CO2 is dissolved in the first liquid volume A this will be pulled towards the micro bubbles and be able to be vented out of the liquid.
  • the term“injector” is meant any supply of a gas into a liquid stream so that micro bubbles are formed from the gas or air in the liquid.
  • the term covers also an’’ejector” which is based on the gas being sucked passively into the stream of liquid (venturi) and an“injector” which is based on something being injected (forced) into the liquid/gas stream.
  • a negative pressure is established in the pipeline 16 in that means 19 to generate a negative pressure is in communication with the pipeline 16.
  • the fluid flow that runs through the horizontal pipe section 16b is diverted in that the pipe section 16b goes over to a downstream pipe section 16c where the main part of the liquid flows through to a venting section 16e where gases are pulled out of the pipeline 16 due to the established negative pressure.
  • By adjusting the negative pressure in the pipeline 16 and adapting the dimension (diameter) of the downstream pipe section 16c and the venting section 16e it is also possible to transfer a part of the liquid that flows through the horizontal pipe section 16b via the venting section 16e.
  • the supply of gases preferably air
  • gases will ensure that the liquid is rising in the pipeline (in the upstream pipe section 16a or horizontal pipe section 16b) as it has become lighter and that it is also lighter than the liquid which is led out of the pipeline via the pipe section 16c, as the gases/air are removed from the liquid in the venting section 16d. That the liquid in the front section 16a is lighter than in the pipe section 16b sets up the flow and transport of the fluid through the pipeline 16. Tests have shown that with sufficient supply of air via the injector 17 and the setting up of sufficient negative pressure via the means 19 to generate a negative pressure, the liquid is transported with sufficient speed through the device 10 without one having to use pumps to pump the liquid.
  • a pumping device 18 to pump the water up from the first liquid volume. It is preferred that this is a propeller pump 18 which is well suited for the pumping of large amounts of water at a low pressure.
  • the pump as shown in figure 1 , is arranged in the upstream pipe section 16a so that the liquid is pulled from the first liquid volume via the upstream pipe section 16a.
  • the pipe section 16b has a
  • the liquid contains smaller amounts of dissolved gases after it has passed the pipe section 16b and the venting section 16d.
  • the first liquid volume A is normally the water reservoir in which the marine organisms such as fish can be found, and this will, after some time, contain large amounts of dissolved CO2. Therefore, it is an aim of the present invention to remove this CO2 or to simultaneously exchange it with oxygen or air. There is a relatively high level of CO2 and low O2 in the first liquid. Furthermore, there will be a mixture of water and small air bubbles in the pipeline sections 16a and 16b and CO2 goes from being dissolved in water and into the air bubbles because of the equilibrium principle. In embodiments of the invention which are not shown in the figures in the downstream pipe section 16c there will be means for the supply of oxygen to the liquid that flows out of the pipeline 16 via the downstream pipe section 16c.
  • a device 19 to set up a negative pressure in the pipe section 16b. This is shown by a fan 19 in figure 1. At such negative pressure the air bubbles that are in the liquid are, in effect, pulled out of the liquid that flows through the horizontal pipe section 16b and further via the venting section 16d to the downstream pipe section 16c. Because of the negative pressure and large surface area between the air bubbles and water this method will effectively remove CO2 and other gases from the liquid.
  • the liquid in the first liquid volume is depleted of gases as it is led through the device 10, i.e. through the different pipe sections 16a, 16b and 16c.
  • the device 10 can be used to move liquids.
  • the liquid is transported from the first liquid volume A via the pipeline 16 to another liquid volume B. This can be from one net cage to another net cage, or it can be from one segment of a net cage to another segment of the net cage.
  • the liquid that is transported through the pipeline 16 is led back to the same liquid volume it comes from, i.e. that the first and second liquid volumes are the same net cage volume or net cage segment.
  • Figure 2 shows an alternative embodiment where a cyclone is used in addition to separate gases and liquid. It can be seen in figure 2 that the device is comprised of a mainly vertical upstream pipe section 16a that goes over into a mainly horizontal pipe section 16b. In the pipe section 16a there are means 17 arranged to supply air, preferably micro bubbles of air. It is not necessary but, in some embodiments, means 18 (not shown in the figure 2) are also used in the upstream pipe section 16a to pull water up from the first liquid volume A and through the pipeline 16.
  • a venting section 16d is set up so that gases, during transport of liquid and air in via the upstream pipe section 16a and the horizontal pipe section 16b, in the venting section 16d are removed from the liquid and are led out of the pipeline 16 via the venting pipe section 16e.
  • foam and gases are removed via the pipe section 16e, as in the pipe section 16e or in connection to the pipe section 16e means 19 are arranged to establish a negative pressure in the venting section 16d.
  • the means 19 to establish the negative pressure can be directly connected to the pipe section 16e and not necessarily via the cyclone 20 as shown in the figure 2.
  • venting section 16d is of a given volume and in particular that the liquid surface is of a given size. Then, one gets a large liquid:gas interfacial area that together with the negative pressure that is set up will give efficient extraction of the gases dissolved in the liquid. Air bubbles that are supplied to the liquid from the injector 17 via the upstream pipe section 16a or the horizontal pipe section 16b will lead to smaller particles being extracted from the liquid and over into the gas phase and out via the venting pipe section 16e. Foam will also be generated in this section that is pulled over into the pipe section 16e.
  • the conditions that are set up in the venting section 16d, i.e. negative pressure, large surface area and a liquid with air bubbles will efficiently separate gases from the liquid. The gases are removed via the pipe section 16e and the largest part of the liquid are led out via the downstream pipe section 16c.
  • a ring 21 with openings 21 a for passive sucking in of air is arranged in the device 10 that is shown in figure 2 .
  • This ring 21 can be arranged in the upstream pipe section 16a above the liquid surface in the liquid volume A, or it can be arranged in the horizontal pipe section 16b.
  • the openings 21 a can be adjustable so that one can regulate the amount of air that is supplied.
  • injection device 2 in the device that is shown in figure 2 that can supply (inject) liquid to the flow of liquid in the pipeline 16.
  • the injection device 22 is preferably arranged in the upstream pipe section 16a but can also be arranged in the horizontal pipe section 16b.
  • a cyclone 20 is located in the device 10 that is shown in figure 2 to separate liquid and gases that flow through the cyclone from the venting pipeline 16e.
  • the means 19 to set up the negative pressure can then be in communication, via the cyclone venting pipeline 16f, with the cyclone 20.
  • Figure 2 shows that the first and second liquid volumes are the same, i.e. the liquid is transported through the device 10 to extract gases and remove foam and particles in the liquid, while the main body of the liquid is led via the downstream pipeline 16c back to the same liquid volume (given as the liquid volume A in the figure).
  • Figure 3 shows the same solution as in figure 2, but where the liquid is transported from a first liquid volume A via the upstream pipe section 16a, horizontal pipe section 16b and the downstream pipe section 16c to a second liquid volume B.
  • Figure 4 shows an embodiment where one has connected several horizontal pipe sections 16a to an upstream pipe section 16b.
  • Figure 4 which shows the device 10 seen from above, shows the connections of four horizontal pipe sections 16b with associated four venting sections 16d. Any number of pipe sections 16b can be connected to one pipe section 16a.
  • the horizontal pipe sections 16b can be connected at different vertical positions in an upstream pipe section 16a.
  • Figure 5 shows an embodiment where several devices 10 are connected after each other. This means gases and, to a smaller extend, liquid, being led via the venting pipe section 16e via a horizontal pipe section 16b’ in a second device 10’
  • the device 10’ is comprised of (which corresponds to the device 10) a venting section 16d’ and a venting pipe section 16e’. This means that the liquid is cleaned of gases, particles and foam in several subsequent cleaning steps.
  • the figure also shows that the rings

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)

Abstract

Des moyens (10) pour éliminer un gaz dans un liquide et/ou d'élimination de mousse et de particules d'un liquide et/ou de transport d'un liquide caractérisé en ce que les moyens (10) comprend des conduits (16) pour transporter le liquide d'un premier volume de liquide A à un second volume de liquide B, le conduit (16) comprend une première partie de conduit amont (16a) pour l'admission de liquide, une partie de conduite sensiblement horizontale (16b), une partie de conduit aval (16c) pour amener du liquide à partir du conduit (16), et une partie de conduit d'aération (16e) pour amener des gaz et une partie de liquide hors du conduit (16), et qui, dans la partie de conduit aval (16c) ou dans la transition entre la partie de conduit aval (16c) et la partie de conduit d'aération (16e), une partie d'aération (16d) est prévu et des moyens (17) sont prévus dans la partie de conduit amont (16a) et/ou la partie de conduit horizontal (16b) pour fournir des microbulles au conduit (16) et que dans le conduit (16) sont prévus des moyens (19) pour établir une sous-pression dans des parties du conduit (16).
PCT/NO2019/050051 2018-03-06 2019-03-06 Moyen pour l'élimination de gaz et de particules d'un liquide et/ou de transfert d'un liquide Ceased WO2019172777A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO20201080A NO20201080A1 (en) 2018-03-06 2020-10-05 Means for removing gases and particles from a liquid, and/or for transfer of a liquid

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NO20180333 2018-03-06
NO20180333A NO344276B1 (no) 2018-03-06 2018-03-06 Oppdrettsmerd
NO20190247A NO20190247A1 (no) 2018-03-06 2019-02-22 Anordning for behandling og/eller transport av væske
NO20190247 2019-02-22

Publications (1)

Publication Number Publication Date
WO2019172777A1 true WO2019172777A1 (fr) 2019-09-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2019/050051 Ceased WO2019172777A1 (fr) 2018-03-06 2019-03-06 Moyen pour l'élimination de gaz et de particules d'un liquide et/ou de transfert d'un liquide

Country Status (1)

Country Link
WO (1) WO2019172777A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20191352A1 (no) * 2019-11-14 2021-05-17 Searas As Fremgangsmåte for å bestemme mengden av en gass oppløst i en væske

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645168A1 (fr) * 1993-08-16 1995-03-29 Praxair Technology, Inc. Stripage de volatile d'un liquide
US20080011679A1 (en) * 2006-07-13 2008-01-17 Institut National Des Sciences Appliquees Method and installation for treating an aqueous effluent, in order to extract at least one dissolved gaseous compound; application to aquaculture in recirculated aqueous medium

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645168A1 (fr) * 1993-08-16 1995-03-29 Praxair Technology, Inc. Stripage de volatile d'un liquide
US20080011679A1 (en) * 2006-07-13 2008-01-17 Institut National Des Sciences Appliquees Method and installation for treating an aqueous effluent, in order to extract at least one dissolved gaseous compound; application to aquaculture in recirculated aqueous medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20191352A1 (no) * 2019-11-14 2021-05-17 Searas As Fremgangsmåte for å bestemme mengden av en gass oppløst i en væske
WO2021096369A1 (fr) * 2019-11-14 2021-05-20 Searas As Procédé et système de surveillance et de mesure de la quantité d'un gaz dissous dans un liquide

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