US20200339456A1 - High-efficiency airlift pump - Google Patents

High-efficiency airlift pump Download PDF

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Publication number
US20200339456A1
US20200339456A1 US16/955,967 US201816955967A US2020339456A1 US 20200339456 A1 US20200339456 A1 US 20200339456A1 US 201816955967 A US201816955967 A US 201816955967A US 2020339456 A1 US2020339456 A1 US 2020339456A1
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United States
Prior art keywords
gas
holes
airlift pump
mixing chamber
injection port
Prior art date
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Abandoned
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US16/955,967
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English (en)
Inventor
David Glassford
Mike Beattie
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GIS Gas Infusion Systems Inc
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GIS Gas Infusion Systems Inc
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Publication date
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Priority to US16/955,967 priority Critical patent/US20200339456A1/en
Assigned to GIS GAS INFUSION SYSTEMS INC. reassignment GIS GAS INFUSION SYSTEMS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BEATTIE, Mike, GLASSFORD, DAVID
Publication of US20200339456A1 publication Critical patent/US20200339456A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23121—Diffusers having injection means, e.g. nozzles with circumferential outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
    • B01F23/232311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit the conduits being vertical draft pipes with a lower intake end and an upper exit end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/80—After-treatment of the mixture
    • B01F23/803—Venting, degassing or ventilating of gases, fumes or toxic vapours from the mixture
    • B01F3/04517—
    • B01F3/2223—
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/18—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from the liquid to be pumped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/18—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from the liquid to be pumped
    • F04F1/20—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium being mixed with, or generated from the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • F04F5/465—Arrangements of nozzles with supersonic flow
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry

Definitions

  • the invention relates generally to air-lift pumps and, more particularly, to vertically orientated lift pumps for the recirculation of fluid in aquaculture systems.
  • Air-lift pumps are self-contained liquid transport devices capable of moving large quantities of water. They are mechanical devices that are usually vertically oriented in the form of a tube or pipe, where the lower portion of the tube is immersed in a liquid medium. The submerged pipe is fitted with an air injection source near the bottom submerged end.
  • gas is simultaneously streamed into the liquid.
  • the injection of the gas may be done via a commercial product known as an air-stone.
  • This injection of gas causes the density of the water to drop, which causes the water to rise within the tube. This then enables or draws other water to enter the tube from the bottom end.
  • the specific gravity of the gas/water mixture lowers, causing the gas/water mixture to rise through the tube and the “heavier” water takes its place at the bottom of the tube before it is also injected with gas.
  • As less-dense water rises in the tube above the water-line level of the tank outside the vertically-oriented tube it will reach one or more ports where the liquid and gas are ejected.
  • This disclosure describes a device for use between an injection port and a mixing chamber within an airlift pump, the device comprising: a planar plate with multiple holes extending therethrough, the holes dimensioned to direct the gas into multiple micro-streams for streaming air from the injection port into the mixing chamber.
  • an airlift pump comprising:
  • FIG. 1 is a side cross-sectional view of an airlift pump according to an example of the present invention
  • FIG. 2 is a plan view of a gas streaming device in isolation used in the lift pump of FIG. 1 ;
  • FIG. 3 is an enlarged view of portion A of the disc of FIG. 2 ;
  • FIG. 4 is a sample table explaining the terms and units of the measurement in the subsequent Figures.
  • FIGS. 5-22 show testing data when the airlift pump of FIG. 1 is used according to Testing Method 1.
  • FIGS. 23-26 show testing data when the airlift pump of FIG. 1 is used according to Testing Method 2.
  • Airlift pump 10 An example embodiment of an airlift pump 10 , a gas streaming device 50 for streaming air into airlift pump 10 , and their use will be discussed. Airlift pump 10 will first be described.
  • airlift pump 10 generally includes an injection port 12 , an injection chamber 14 , a mixing chamber 16 , a lift tube 18 , an ejection port 20 , and gas streaming device 50 positioned between injection port 12 and mixing chamber 16 .
  • Injection port 12 is positioned at one end of airlift pump 10 and is fluidly coupled to an air supply 22 and connected to injection chamber 14 .
  • the location and dimension of injection port 12 may vary.
  • an airlift pump having a 6-inch diameter may have a 2-inch diameter injection port to allow a sufficient volume of water to enter airlift pump 10 without a significant pressure drop.
  • an airlift pump having a 1-inch diameter may have a 1 ⁇ 8-inch diameter injection port.
  • injection port 12 may be positioned at the bottom or on a side of one end of airlift pump 10 , so long as injection port 12 is located close to the bottom of the tank to maximize lift capacity.
  • Injection chamber 14 is, in turn, fluidly connected to mixing chamber 16 with gas streaming device 50 positioned therebetween.
  • gas streaming device 50 is sealed from the surrounding liquid and is orientated horizontally or laterally between injection chamber 14 and mixing chamber 16 .
  • the height of gas streaming device 50 is as small as pre-manufactured parts may permit in order to avoid positioning a large air pocket near the bottom of the tank that may cause the unit to float.
  • the diameter of injection chamber 14 would generally correspond with the diameter of its corresponding airlift pump. For example, a 6-inch diameter airlift pump would have a 6-inch diameter injection chamber.
  • Mixing chamber 16 as shown, is a cylindrical tube with perforations in its walls 17 .
  • the height of mixing chamber 16 may vary, but it is typically, 8-12 inches.
  • mixing chamber 12 is where the surrounding water/liquid will be drawn into airlift pump 10 , in order to maximize circulation, mixing chamber 12 is generally positioned as close to the bottom of the tank as possible.
  • the exact size and arrangement of the perforations may vary, in order to keep particulate and organisms out of airlift pump 10 . That being said, the perforations typically form at least 60% open space for water or liquid to enter airlift pump 10 .
  • Lift tube 18 is fluidly connected to, and extends from, mixing chamber 16 .
  • Ejection port 20 is, in turn, is fluidly connected to and extends from lift tube 18 . In this manner, ejection port 20 is positioned at the opposite end of airlift pump 10 , opposite injection port 12 .
  • Ejection port 20 has a gas discharge aperture 24 orientated parallel to lift tube 18 , and a liquid discharge aperture 26 orientated generally perpendicular to lift tube 18 .
  • Airlift pump 10 also includes a fluid flow sensor 32 integrated into ejection port 20 .
  • airlift pump 10 further has a bacterial media 28 suspended within lift tube 18 or attached to the inner wall lift tube 18 .
  • injection chamber 14 may contain a diffuser, a baffle, or other mechanical means to promote uniform flow through the face of gas streaming device 50 .
  • the positioning of one or more injection ports 12 may be another mechanical means to promote even flow through gas steaming device 50 .
  • airlift pump 10 includes multiple gas injection ports proximate the bottom of lift pump 10 , which would be connected with one or more injection chambers.
  • airlift pump 10 would include multiple gas streaming devices, a gas flow control valve and a following flow rate sensor.
  • the gas flow control valve and flow rate sensors would be configured regulate gas flow to the multiple gas streaming devices.
  • another fluid flow sensor would be integrated into lift tube 18 .
  • a mechanical apparatus such as a pump, is integrated with injection port 12 to enable adjustment and control of the gas pressure directed into injection chamber 14 .
  • airlift pump 10 would have components with non-circular cross-sections.
  • the height and/or radius of lift tube 18 may be altered to maximize the removal of gas from the liquid medium.
  • the height and radius of lift tube 18 may be modified to accommodate different tank dimensions and air sources.
  • Airlift pump 10 may also be packaged and integrated with a transportable tank containing the liquid medium to be remediated by airlift pump 10 .
  • Gas streaming device 50 will now be described in detail and is shown in isolation in FIGS. 2 and 3 .
  • Gas streaming device 50 comprises a body with multiple holes or perforations 52 having a diameter of 0.35 mm. As shown, the body is a circular plate 54 having a first face, an opposed second face, and a perimeter 56 .
  • Plate 54 is formed from a solid hydrophobic material which can be cleaned and sterilized. Plate 54 has a thickness of 12.7 mm.
  • Multiple holes 52 extend from the first face to the second face and are evenly spaced throughout plate 54 .
  • multiple holes 52 are spaced 0.55 mm, center to center, apart from one another in a grid pattern.
  • Multiple holes 52 are also positioned at least 0.5 mm from perimeter 56 of plate 54 .
  • multiple holes 52 in plate 54 contain a helical groove pattern, or rifling.
  • the rifling is orientated at a 30-degree angle with respect to the longitudinal axis of each hole.
  • perforations 52 generally do not change relative to the diameter or height of airlift pump 10 .
  • the size and configuration of perforations 52 may vary.
  • the holes or perforations 52 may have diameters generally between 0.2 mm-0.4 mm.
  • multiple holes 52 are spaced 0.5 mm-0.6 mm apart, center to center, from one another in a grid pattern and plate 54 has a thickness between 12-13 mm.
  • multiple holes 52 are unevenly spaced throughout plate 102 .
  • the body is composed of packed fiber which may be oriented vertically and/or horizontally to force the gas to flow around the fiber.
  • the fiber would be hydrophobic and packed within perforated plates.
  • Air lift pump 10 Movement of fluid through the use of airlift pump 10 is indicated by the arrows in FIG. 1 .
  • the movement of gas is indicated by dashed arrows, while movement of water is indicated by solid arrows.
  • air lift pump 10 is positioned within a body of water 100 in tank 102 such that injection chamber 14 and mixing chamber 16 are submerged while ejection port 20 is above the water line.
  • Pressurized air is injected by air supply 22 through injection port 12 and into injection chamber 14 . From there, the air is directed through gas streaming device 50 into mixing chamber 16 . Gas streaming device 50 forces the gas or air into multiple streams as it enters mixing chamber 16 .
  • the diameter and spacing of multiple holes 52 in plate 54 are set to generate, uniform small gas streams at the bottom of the pump that are as vertical as possible so as to provide uniform lift.
  • the helical groove pattern, or rifling, of multiple holes 52 also helps to gyroscopically stabilize the gas flow as it leaves plate 54 . These features help to minimize the merging of gas streams and to minimize the leakage of gas out of the perforated walls 17 of mixing chamber 16 .
  • Plate 54 is also orientated horizontally within airlift pump 10 .
  • multiple holes 52 are orientated generally parallel with the longitudinal orientation of airlift pump 10 , which serves to help ensure the longest possible narrow vertical path for each gas stream as they leave plate 54 .
  • the uniformity of the gas streams helps to impart a more uniform lift to the liquid from the gas.
  • a vertical stream is also beneficial to help prevent air streams from merging to form larger bubbles, which would provide less uniform lift.
  • mixing chamber 16 As the streams of air enter mixing chamber 16 , they mix with the water within mixing chamber 16 . This mixing creates a water/air mixture that has a density that is less than the density of the water surrounding mixing chamber 16 . Due to its lower density, the water/air mixture rises through lift tube 18 towards ejection port 20 .
  • Bacterial media 28 enables bacteria to be used to remediate targeted impurities within the liquid such as ammonia.
  • the height and/or radius of lift tube 18 is adjusted to accommodate the depth of the surrounding liquid medium and the desired lift of the liquid medium by the pump above the water line.
  • Airlift pump 10 may be used simultaneously with one or more saturator systems in a body of water.
  • Saturator systems are configured to conduct a gas exchange with an aqueous-phase liquid inline with the same body of water.
  • the saturator systems are adapted to dissolve oxygen into the water and remove carbon dioxide, such that the overall gas pressure within the fluid is relatively unchanged.
  • An example of such a saturator system is disclosed in U.S. 62/610,675.
  • Each saturator system uses one or more gas infusion devices to dissolve oxygen into the water.
  • Each gas infusion device has a fibre module array situated between its ends where the fibre module array is made up of a polymer coated microporous fiber material.
  • An example of such a gas infusion device is found in U.S. Pat. No. 7,537,200, to Glassford, Oct. 31, 2003.
  • the saturator system oxygenates the body of water and removes carbon dioxide, while the one or more airlift pumps 10 also remove the dissolved CO2 and remediates the ammonia to form nitrate.
  • Such a combined system may further include one or more oxygen tanks connected to the saturator system for supplying oxygen to the saturator system, and a compressor coupled to airlift pumps 10 to supply ambient air to generate the lift.
  • Such a system may also have a gas regulator operatively coupled between the oxygen tanks and the saturator system to regulate the flow of gas into the saturator system, a dissolved oxygen sensor positioned within the body of water, a saturator feed pump in fluid communication with the body of water, adapted to draw and direct water from the body of water into the saturator system, and an ammonia sensor positioned within the body of water.
  • a gas regulator operatively coupled between the oxygen tanks and the saturator system to regulate the flow of gas into the saturator system
  • a dissolved oxygen sensor positioned within the body of water
  • a saturator feed pump in fluid communication with the body of water, adapted to draw and direct water from the body of water into the saturator system
  • an ammonia sensor positioned within the body of water.
  • a control and monitoring system may be in place to communicate with, control and coordinate each of the above components.
  • the compressor can be activated to engage airlift pumps 10 in response to the detected concentration of ammonia rising above a maximum level.
  • the compressor may then be disengaged to deactivate airlift pumps 10 in response to the detected concentration of ammonia falling below a minimum level.
  • the gas regulator and the saturator feed pump may be activated and controlled in response to the detected concentration of oxygen falling below a minimum level.
  • the gas regulator and the saturator feed pump may also be deactivated accordingly.
  • An advantage of the use of the present gas streaming device 50 in airlift pump 10 is that it is able to lift 3 or more unit volumes of liquid using only one unit volume of gas the same distance as a conventional lift pump.
  • the increased efficiency may also enable airlift pump 10 to be economic in other applications where it is desirable to lift a liquid or induce flow.
  • CO 2 was first dissolved into a body of water to the desired level in the tank using any method known in the art.
  • Airlift pump 10 was attached to an air source with a measurable flow, and then inserted into the body of water in the tank, ensuring that ejection port 20 was above the water line, noting that the exact location would depend on the airlift pump unit.
  • Air is then supplied to airlift pump 10 and the air pressure within injection chamber 14 underneath gas streaming device 10 is measured to determine actual air flow.
  • the flow of water out of liquid discharge aperture 26 was measured along with the temperature and salinity of the water within the tank. These measurements were used to create a profile of the tank concentration of CO 2 over time, as well as the efficiency of airlift pump 10 (using the known amount of water leaving liquid discharge aperture 26 and the concentration in the tank. The instantaneous rate of change in CO 2 (amount removed at any given concentration) was determined by taking the derivative of the concentration over time.
  • Test Method 2 A second test method (Test Method 2), largely similar to Test Method 1, was used in situations where it was not possible to measure the water flow out of the airlift pump 10 .
  • This method involved continuously adding a known quantity of CO 2 to the tank while airlift pump 10 was in operation until equilibrium was achieved (i.e. the point at which the CO 2 being added was equal to the CO2 being removed). By determining the concentration at both the top and bottom of the airlift pump 10 , the flowrate of water was calculated.
  • FIGS. 4 to 26 The overall results are illustrated in FIGS. 4 to 26 .
  • FIG. 4 is a sample table explaining the terms and units of measurement in the tables of FIGS. 5 to 26 .
  • the first graph in each Figure shows the decrease in CO 2 levels over the course of the trial (using Test Method 1).
  • the second graph in each Figure shows the calculated rate of change in CO 2 for any concentration using the airlift pump at the parameters specified in the corresponding table.
  • Each corresponding table shows all the fixed settings for the particular trial as well as the calculated liquid to gas ratio and the calculated percent removal.
  • the first graph in each Figure shows the decrease in CO 2 levels over the course of the trial measurements, which were taken at both the top and bottom of the lift (using Test Method 1).
  • the second graph in each Figure shows the calculated rate of change in CO2 for any concentration using the lift at the parameters specified in the corresponding table.
  • Each table shows all the fixed the settings for the respective trial as well as the calculated liquid to gas ratio and the calculated percent removal.
  • the first graph shows the decrease in CO2 levels over the course of the trial (using Test Method 1).
  • the second graph shows the calculated rate of change in CO2 for any concentration using the lift at the parameters specified in the table.
  • the table shows all the fixed settings for the trial as well as the calculated liquid to gas ratio and the calculated percent removal.
  • the first graph shows the decrease in CO2 levels over the course of the trial (using Test Method 1). This is a comparison of the old and new disc (or gas streaming device) styles and shows little difference in performance at the given levels.
  • the old disc style was a “disc” that consisted of numerous hydrophobic hollow fibers held in place with epoxy to generate a similar effect as gas streaming device 50 .
  • the holes in the old disc were not always uniform or strait, or even always open, which naturally caused a drop in the efficiency and quality of gas diffusion.
  • the second graph shows the calculated rate of change in CO2 for any concentration using the airlift pump at the parameters specified in the table.
  • the table shows all the fixed the settings for the trial as well as the calculated liquid to gas ratio and the calculated percent removal.
  • the first graph in each Figure shows the decrease in CO 2 levels over the course of the trial (using Test Method 1).
  • the second graph in each Figure shows the calculated rate of change in CO 2 for any concentration using the lift at the parameters specified in the table.
  • the table shows all the fixed settings for the trial as well as the calculated liquid to gas ratio and the calculated percent removal.
  • each table is representative of a trial (using Test Method 2) and shows all the fixed settings as well as the calculated water flow rate, the calculated liquid to gas ratio and the calculated percent removal rate.
  • Disc type 1 is gas streaming device 50 that is composed of packed fiber which may be oriented vertically and/or horizontally to force the gas to flow around the fiber.
  • Disc type 2 is the first printed disc with the same nominal dimension and spacing as the fiber disc of Disc Type 1.
  • FIGS. 23-26 illustrate data generated when using Disc types 3, 4, and 5.
  • the hole and spacing sizes of Disc types 3-5 are smaller than that of Disc type 2.
  • the holes were between 0.3 and 0.4 mm and the pinch was between 0.45 and 0.55 mm.
  • the holes were between 0.15 and 0.25 mm and the pinch was between 0.35 and 0.45 mm.
  • the holes were between 0.175 and 0.225 mm and the pinch was between 0.25 and 0.35 mm.
  • the present invention is able to lift 3 or more unit volumes of liquid using only one unit volume of gas the same distance as a conventional lift pump.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Farming Of Fish And Shellfish (AREA)
US16/955,967 2017-12-19 2018-12-19 High-efficiency airlift pump Abandoned US20200339456A1 (en)

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US201762607385P 2017-12-19 2017-12-19
US201762608672P 2017-12-21 2017-12-21
US16/955,967 US20200339456A1 (en) 2017-12-19 2018-12-19 High-efficiency airlift pump
PCT/CA2018/051624 WO2019119131A1 (fr) 2017-12-19 2018-12-19 Pompe à émulsion d'air à haut rendement

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US (2) US20200339456A1 (fr)
EP (2) EP3774012B1 (fr)
JP (1) JP2021506345A (fr)
CA (1) CA3086356A1 (fr)
CL (1) CL2020001627A1 (fr)
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WO2022173493A1 (fr) * 2021-02-09 2022-08-18 Matt Hutcheson Production d'hydroélectricité en utilisant les changements de densité de colonne d'eau pour induire un écoulement vertical

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EP3774012B1 (fr) 2024-01-24
EP3774012A4 (fr) 2021-06-23
WO2019119131A1 (fr) 2019-06-27
US20230416125A1 (en) 2023-12-28
DK3774012T3 (da) 2024-04-22
EP4336053A3 (fr) 2024-04-03
CA3086356A1 (fr) 2019-06-27
EP3774012A1 (fr) 2021-02-17
EP4336053A2 (fr) 2024-03-13
JP2021506345A (ja) 2021-02-22
CL2020001627A1 (es) 2021-01-29

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