WO2022167025A1 - Flotationsanlage, verwendung und verfahren - Google Patents
Flotationsanlage, verwendung und verfahren Download PDFInfo
- Publication number
- WO2022167025A1 WO2022167025A1 PCT/DE2022/000009 DE2022000009W WO2022167025A1 WO 2022167025 A1 WO2022167025 A1 WO 2022167025A1 DE 2022000009 W DE2022000009 W DE 2022000009W WO 2022167025 A1 WO2022167025 A1 WO 2022167025A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solid materials
- liquid
- liquid mixture
- flotation
- gas bubbles
- Prior art date
Links
- 238000005188 flotation Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009434 installation Methods 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 claims abstract description 91
- 239000000203 mixture Substances 0.000 claims abstract description 57
- 239000011343 solid material Substances 0.000 claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000002351 wastewater Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000002537 cosmetic Substances 0.000 claims description 3
- 239000006071 cream Substances 0.000 claims description 2
- 235000013365 dairy product Nutrition 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 235000013305 food Nutrition 0.000 claims description 2
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 2
- 235000013372 meat Nutrition 0.000 claims description 2
- 239000008267 milk Substances 0.000 claims description 2
- 235000013336 milk Nutrition 0.000 claims description 2
- 210000004080 milk Anatomy 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000004753 textile Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 2
- 238000000746 purification Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 238000009300 dissolved air flotation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1431—Dissolved air flotation machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/24—Pneumatic
- B03D1/247—Mixing gas and slurry in a device separate from the flotation tank, i.e. reactor-separator type
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
-
- 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
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- 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
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
-
- 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
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/325—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of wine products
-
- 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
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/327—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of dairy products
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
-
- 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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
-
- 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
- C02F2103/44—Nature of the water, waste water, sewage or sludge to be treated from vehicle washing facilities
Definitions
- the invention relates to a flotation system for the physical-chemical separation of liquid mixtures according to the preamble of claim 1, a use of a flotation system according to the preamble of claim 9 and a method of using a flotation system according to the preamble of claim 10.
- Flotation processes as separation processes for liquid mixtures have in common that small gas bubbles are used to float the solid materials to be separated, which attach themselves to floating solid particles as they rise, so that their flotation is made possible.
- a gas dissolved in a liquid under pressure bubbles out when the pressure is reduced/released.
- wastewater is usually saturated with air at an overpressure of between 4 and 6 bar and then fed into a flotation tank of a flotation reactor via expansion devices. After expansion to atmospheric pressure, the excess air bubbles out of the liquid in the form of fine bubbles.
- the gas bubbles form an agglomerate with the solid in the liquid mixture, which due to its low density rises to the surface of the flotation reactor and can be removed there.
- the solubility of a gas in a liquid phase increases proportionally with the partial pressure of this gas above the liquid.
- the object of the present invention is to provide an improved dissolved air flotation system that avoids the disadvantages of the prior art.
- a flotation system for the physical-chemical separation of liquid mixtures, in particular process waste water and/or recycling circuits, with dispersed and/or suspended solid materials due to different surface wettability of the solid materials, with gas bubbles adhering to at least some of the solid materials being attached to a surface of the liquid mixture and can be cleared with clearing devices for floating solid materials, in particular with movable slide devices and/or with a funnel, comprising a flotation reactor, in particular round and/or angular, in particular with a flotation tank for receiving the liquid mixture, a device for generating gas bubbles, which at least attachable to a portion of the solid materials, comprising means for generating a predetermined pressure in a liquid stream, the liquid tsstrom gas, in particular air, is to be supplied under overpressure, with a device for pressure relief being provided downstream in the direction of the liquid stream for generating gas bubbles occurring in the liquid stream, with an ultrasonic device comprising at least one ultrasonic actuator being provided downstream of the device for pressure relief,
- an optimal gas bubble spectrum can be reliably adjusted in the sense of microbubble generation and predetermined, small bubble sizes, which have properties adapted to the respective solid materials to be separated.
- the type of bubble generation and the resulting bubble quality, quantity and size can be easily adjusted during operation. This represents both an environmentally friendly and at the same time energy-saving system.
- a corresponding degree of cleaning can be obtained with lower energy consumption, especially with a wide range of system pressures, especially low system pressures of less than 4 bar, especially even from 1 bar, so that a low-energy system can be achieved.
- the attachment of the gas bubbles to the solid materials contained in the liquid mixture thus takes place more easily and intensively according to the invention.
- the bubbles generated have a more homogeneous size distribution and are smaller on average. Due to the better ability of small bubbles to accumulate, reducing the size of the bubbles leads to improved utilization of the air introduced and also to a more complete expulsion of the solid materials from the liquid mixture, which reduces both the solids concentration in the clear run area of the flotation and the stability of the flotation to be removed flotate cover increases.
- the zone downstream of the expansion device, in particular the expansion nozzles is advantageously equipped with ultrasonic actuators which cause the bubble-water mixture in the liquid mixture arriving in this area to oscillate and break up large gas bubbles, in particular air bubbles.
- micro-bubbles in the range of around 20-10 pm, for example are generated from the otherwise less effective macro-bubbles larger than about 100 pm, but also larger than 50 pm, and the bubble carpet is homogenized .
- the carpet of microbubbles therefore advantageously has very small microbubbles, in particular less than about 20 pm, but overall advantageously less than about 100 pm.
- the formation of larger bubbles can thus be prevented, which would otherwise pull the desired small bubbles upwards before they can combine with the solid materials.
- the liquid mixture can also be chemically and physically pretreated and flocculated, so that the undissolved substances and precipitable substances contained in the wastewater receive a corresponding particle size, which can be floated through the carpet of micro-air bubbles, which can be advantageously adjusted according to the invention.
- the pretreated, flocculated liquid mixture can advantageously be an inlet zone of a flotation reactor. In this zone, a partial flow of water saturated with compressed air, in particular in a partial flow quantity of about 5-20%, can be supplied and expanded directly, with corresponding bubbles being produced by a suitable design of the expansion device.
- the amount of bubbles generated depends on the degree of enrichment and the saturation of the air in the partial water flow, which depends, among other things, on the pressure and temperature of the chemical composition of the liquid mixture.
- the saturation of air is insufficient, especially at temperatures above 40°C and pressures below 3 bar.
- air saturation at high pressure is associated with increasing energy expenditure, so that the aim is not to operate the air saturation at 5-6 bar, as is customary on the market, but at 3 bar, which is made possible by the ultrasonic device according to the invention.
- Flotation tanks can, for example, be equipped with mechanical clearing devices and/or hydraulic clearing devices, in particular with flat bottoms and/or hoppers and/or discharge devices.
- Flotation reactors can operate with air saturation in a main stream and/or in a bypass stream.
- Exemplary plant capacities are between 0.5 and 100 m 3 /h.
- the ultrasonic actuator is provided in a round rod design and/or in a flat design. It is advantageous if the ultrasonic actuator has a power density of between approximately 20 watts/m 3 and approximately 500 watts/m 3 .
- the sound energy is designed in particular in such a way that the solid materials, in particular lumps of sludge, are not destroyed and a surface of the flotation basin is not activated so that the solid materials to be floated can accumulate here as a sludge phase.
- the ultrasonic actuator has adjustable ultrasonic frequencies between approximately 20 kHz and approximately 1 MHz.
- the device for generating gas bubbles is set up for use in a clear water flow from the flotation reactor and/or at least a partial flow of the liquid mixture.
- parameters of the device are to be adjusted depending on the type of gas and/or type of liquid mixture and/or saturation pressure and/or pH value of the liquid mixture and/or the viscosity of the liquid mixture and/or the surface tension of the liquid mixture.
- the parameter provided is the size of the gas bubbles generated, which can be influenced by the type of gas and/or type of liquid mixture and/or saturation pressure and/or pH value of the liquid mixture and/or the viscosity of the liquid mixture and/or the surface tension of the liquid mixture, in particular thus advantageously adaptable in combination with the ultrasonic device provided according to the invention.
- the device for pressure relief includes nozzles and/or needle valves and/or cone valves.
- nozzles, needle or cone valves NEN small gas bubbles are generated, which can be further improved by the ultrasonic device according to the invention.
- the object is also achieved by using a device according to one of claims 1 to 8 for cleaning waste water and/or process water with emulsified and/or dispersed solid materials, in particular paint waste water from brush cleaning and/or waste water from boat washing and/or container washing systems and/or cream production and/or skin care product production and/or meat processing and/or slaughterhouses and/or dairies/milk production and/or wine production and/or juice production and/or breweries and/or canners and/or canteen kitchens and/or canteens and/or restaurants and/or cosmetics production and/or food production and/or for transport companies and/or chemical industry and/or pharmaceutical industry and/or petrochemical industry and/or textile industry and/or paper industry.
- emulsified and/or dispersed solid materials in particular paint waste water from brush cleaning and/or waste water from boat washing and/or container washing systems and/or cream production and/or skin care product production and/or meat processing and/or slaughterhouses and/or dairies/milk production and/or
- the present invention a high degree of cleaning can be achieved in a wide variety of application areas with less energy input, as a result of which additional environmental protection and at the same time an acceleration of the cleaning process can be noted. It is particularly advantageous if the proportion of dispersed, emulsified and particulate solids flowing into the plant is 100 to 20,000 mg/l and the solids to be separated consist predominantly of organic/inorganic product residues and cleaning residues, such as those found in the plastics industry, cosmetics industry, in industrial washing and cleaning processes.
- the object is also achieved by a method for cleaning and / or separation using a flotation system according to one of claims 1 to 8, for the physical-chemical separation of liquid mixtures, in particular process waste water and / or recycling circuits, with dispersed and / or suspended solid materials different surface wettability of the solid materials, with gas bubbles adhering to at least a part the solid materials is transported to a surface of the liquid mixture and is cleared away with clearing devices for floating solid materials, in particular with movable slide devices and/or with a hopper, comprising a flotation reactor, in particular round and/or angular, in particular with a flotation basin for receiving the liquid mixture, a device for generating gas bubbles which are attached to at least some of the solid materials, with a device for generating a predetermined pressure in a liquid flow, with the liquid flow being supplied with gas, in particular air, under overpressure, with a device downstream in the direction of the liquid flow for pressure relief gas bubbles are generated in the liquid flow, downstream of the device for pressure relief by means of an
- FIG. 1 shows a device according to the invention in a schematic drawing.
- Fig. 1 shows a flotation system 1 according to the invention for the physical-chemical separation of liquid mixtures 2, in particular process waste water and/or recycling circuits, with dispersed and/or suspended solid materials 3 due to different surface wettability of the solid materials 3, with gas bubbles 4 adhering to at least one Part of the solid materials 3 can be transported to a surface 5 of the liquid mixture 2 and can be cleared with clearing devices 6 for floating solid materials 3, in particular with movable slide devices 16 and/or with a hopper, comprising a flotation reactor 7, in particular round and/or angular, in particular with a flotation tank 8 for receiving the liquid mixture 2, a device 9 for generating Gas bubbles 4, which can be deposited on at least part of the solid materials 3, comprising a device 10 for generating a predetermined pressure in a liquid flow 11, wherein the liquid flow 11 is to be supplied with gas, in particular air, under overpressure, with the liquid flow 2 being downstream in the direction 12 a device 13 for pressure relief is provided for generating gas bubbles 4 occurring in the liquid flow
- Liquid flow can be, for example, clear water from the flotation reactor 7, which is enriched with gas bubbles, whereupon the liquid flow is fed to the liquid mixture 2, whereupon the mixture of the two flows is passed through the ultrasonic device and a further improvement in the bubble distribution and a reduction in the size of the gas bubbles is achieved.
- the full-flow process in which the entire feed of liquid mixtures 2 is saturated with air
- a partial-flow process in which only part of the feed to the flotation reactor, for example clear water from the flotation reactor 7, is Gas, in particular air, is saturated
- a recirculation method in which any amount of the cleaned clear water is recirculated and is thereby saturated with gas, in particular air.
- the recirculation volume can be adapted in such a way that the necessary number of fine gas bubbles is sufficient for all expected operating conditions.
- a measurement is carried out in a gas quantity measuring device 17, as shown by way of example, and the gas quantity is then regulated in a gas quantity regulating device 18.
- the streams that are combined are fed into the flotation reactor 7 and flow through an upflow area 19, whereupon a flotation carpet 20 is formed, which is cleared and derived, for example, by means of clearing devices 6 by movable slide devices 16 .
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22706504.2A EP4288216A1 (de) | 2021-02-08 | 2022-02-03 | Flotationsanlage, verwendung und verfahren |
DE112022000989.6T DE112022000989A5 (de) | 2021-02-08 | 2022-02-03 | Flotationsanlage, Verwendung und Verfahren |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021000607.0 | 2021-02-08 | ||
DE102021000607.0A DE102021000607A1 (de) | 2021-02-08 | 2021-02-08 | Flotationsanlage, Verwendung und Verfahren |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022167025A1 true WO2022167025A1 (de) | 2022-08-11 |
Family
ID=80624046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2022/000009 WO2022167025A1 (de) | 2021-02-08 | 2022-02-03 | Flotationsanlage, verwendung und verfahren |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4288216A1 (de) |
DE (2) | DE102021000607A1 (de) |
WO (1) | WO2022167025A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3733583A1 (de) * | 1987-10-03 | 1989-04-20 | Dietrich Dr Eichler | Verfahren und vorrichtung zur erzeugung feinster luftblasen zur flotation von schlaemmen |
DE102010052191A1 (de) * | 2010-11-24 | 2012-05-24 | Envirochemie Gmbh | Druckentspannungsflotation |
CN110433966A (zh) * | 2019-08-15 | 2019-11-12 | 中国矿业大学 | 一种水力-声流空化微泡发生器及工作方法 |
US20200016609A1 (en) * | 2015-12-22 | 2020-01-16 | International Business Machines Corporation | Froth flotation with anisotropic particle collectors |
-
2021
- 2021-02-08 DE DE102021000607.0A patent/DE102021000607A1/de not_active Withdrawn
-
2022
- 2022-02-03 EP EP22706504.2A patent/EP4288216A1/de active Pending
- 2022-02-03 WO PCT/DE2022/000009 patent/WO2022167025A1/de active Application Filing
- 2022-02-03 DE DE112022000989.6T patent/DE112022000989A5/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3733583A1 (de) * | 1987-10-03 | 1989-04-20 | Dietrich Dr Eichler | Verfahren und vorrichtung zur erzeugung feinster luftblasen zur flotation von schlaemmen |
DE102010052191A1 (de) * | 2010-11-24 | 2012-05-24 | Envirochemie Gmbh | Druckentspannungsflotation |
US20200016609A1 (en) * | 2015-12-22 | 2020-01-16 | International Business Machines Corporation | Froth flotation with anisotropic particle collectors |
CN110433966A (zh) * | 2019-08-15 | 2019-11-12 | 中国矿业大学 | 一种水力-声流空化微泡发生器及工作方法 |
Also Published As
Publication number | Publication date |
---|---|
EP4288216A1 (de) | 2023-12-13 |
DE112022000989A5 (de) | 2024-01-11 |
DE102021000607A1 (de) | 2022-08-11 |
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