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WO2025149611A1 - Système de traitement de liquide et procédé associé - Google Patents

Système de traitement de liquide et procédé associé

Info

Publication number
WO2025149611A1
WO2025149611A1 PCT/EP2025/050530 EP2025050530W WO2025149611A1 WO 2025149611 A1 WO2025149611 A1 WO 2025149611A1 EP 2025050530 W EP2025050530 W EP 2025050530W WO 2025149611 A1 WO2025149611 A1 WO 2025149611A1
Authority
WO
WIPO (PCT)
Prior art keywords
volume
liquid
volume portion
nanobubbles
processing
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.)
Pending
Application number
PCT/EP2025/050530
Other languages
English (en)
Inventor
Robert Schaefer
Gareth SCHAEFER
Peter ESPINA
Dipen Sinha
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.)
Single Buoy Moorings Inc
Original Assignee
Single Buoy Moorings Inc
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
Application filed by Single Buoy Moorings Inc filed Critical Single Buoy Moorings Inc
Publication of WO2025149611A1 publication Critical patent/WO2025149611A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0005—Degasification of liquids with one or more auxiliary substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
    • B01D19/0078—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042 by vibration
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
    • 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
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles

Definitions

  • the present invention relates to a liquid processing system.
  • the invention relates to a method for liquid processing.
  • a floating production, storage and offloading (FPSO) vessel is typically used by the offshore oil and gas industry for the processing of hydrocarbon feeds and for storage of hydrocarbon products (liquid and/or gas) from the feeds.
  • FPSO floating production, storage and offloading
  • FLNG vessel For liquid natural gas, LNG, applications such vessel is referred to as FLNG vessel.
  • the vessel is designed to receive a feed comprising hydrocarbons and other components from a nearby offshore platform or directly from a subsea well.
  • the received feed is processed by processing equipment on the vessel to separate the hydrocarbons from the other components.
  • water is used for example for purposes such as steam generation or cooling.
  • seawater is taken in, filtered, desalinated if required and supplied to processing equipment and the vessel’s operational equipment.
  • the process water can absorb contaminants from the application.
  • contaminants involve for example (solid) particles ranging from a sub-micrometer size to a size of tens of micrometers.
  • the process water is to be cleaned and discharged.
  • a liquid processing system comprising a container device defining a processing volume and configured to receive contaminated liquid, a gas supplying device and an ultrasonic acoustic source, the container device having a process inlet for receiving liquid and a process outlet for discharging liquid; the gas supplying device configured for providing a stream of a gas to the processing volume in the container device; the ultrasonic acoustic source coupled to the container device and configured to provide acoustic energy to the processing volume in the container device, the processing volume being arranged between the process inlet and the process outlet; the gas supplying device is configured with a bubble generator for generating a stream of nanobubbles during a first mode and for generating a stream of microbubbles during a second mode, so as to supply the stream of nanobubbles to the liquid in the processing volume in the first mode, the nanobubbles having a diameter of 250 nm or less, and to supply the stream of microbubbles to the liquid in the processing volume in the second mode, the micro
  • Figure 1 shows a liquid processing system according to an embodiment of the invention.
  • the second volume portion is connected to the process outlet conduit 30.
  • the process outlet conduit 30 is configured with a first and second outlet 32, 34 for liquid from the second volume 20.
  • the process outlet conduit 30 is provided with a separator 31 configured for separating the liquid received from the second volume portion into a cleaned portion of liquid through the first outlet 32 and a contaminated portion of liquid holding the impurities through the second outlet 34.
  • the seawater processing system 100 receives waste liquid from the process equipment I vessel 1 at the process inlet conduit 5.
  • the waste liquid is transported through the process inlet conduit 5 into the first volume portion 10.
  • the waste liquid is exposed to a stream of nanobubbles of gas or air from the bubble generator 15.
  • nanobubbles refers to air or gas bubbles with a diameter of typically about 250 nm or less , which due to their size are electrically charged, which allows nanobubbles to be an extremely efficient source of absorber of contaminations of various types and sizes. Impurities of size in the range from a few submicron to about ten microns are thus captured/decorated by nanobubbles.
  • the bubble generators are configured to mix gas into a stream of liquid to obtain a stream of liquid enriched with nanobubbles or microbubbles.
  • nanobubbles and microbubbles refer to air or gas bubbles.
  • Microbubbles are defined to have a size of 500 nm or more, typically about 1 micron, whereas nanobubbles have typically a size of 250 nm or less.
  • nanobubbles or microbubbles maybe generated by a cavitation process in which the water is exposed to acoustic signals in a frequency range between about 30kHz and about 100kHz. It is observed that typically cavitation threshold goes down significantly as the frequency is increased beyond 100 kHz.
  • ultrasonic frequencies above 100 kHz are used.
  • the ultrasonic frequency is between about 100 kHz and about 1 MHz.
  • the ultrasonic frequency is between about 400 kHz and about 700 kHz.
  • a single bubble generator may be adjustable to create either nanosized bubbles or micron-size bubbles.
  • Nanobubble (and microbubble) generators are known in the art and can be based on various bubble generation methods: see for example, US 10,814,290. It is observed that nanobubbles have no significant buoyancy in water and therefore remain substantially floating/dispersed in the water. Thus, the liquid in the first volume portionlO can be regarded as a mixture of liquid in which the nanobubbles are dispersed.
  • the liquid is exposed to the nanobubbles.
  • the mixture of waste liquid and nanobubbles is exposed to a stream of microbubbles that is created by the second bubble generator.
  • microbubbles have the effect of causing nanobubbles to cluster with microbubbles.
  • the impurities that were captured/absorbed/decorated by the nanobubbles are taken up by the bubble clusters, i.e. the clusters of nano- and microbubbles.
  • the nanobubble/microbubble clusters are exposed to an ultrasonic acoustic signal from an ultrasonic acoustic source that promotes coalescence of the clusters into larger bubbles (with a size in the order of millimeters).
  • the ultrasonic acoustic source 28 is configured to generate ultrasonic acoustic waves with a frequency in the ultrasonic range from about 80 kHz to about 500 kHz, preferably in a range above 100 kHz, more preferably from above 100kHz to about 1 MHz, even more preferably in a range between 400 kHz and 700kHz.
  • the ultrasonic waves can be applied in a continuous manner but can also be pulsed or intermittent depending on the volume of containment and the flow of the water.
  • Separator 31 in the outlet conduit 30 is configured to separate the liquid flow incoming from the second volume portion 20 into a contaminated portion of the liquid flow enriched with impurities and a clean portion of the liquid flow depleted from impurities.
  • the separator 31 is operative based on the density difference between liquid and coalesced bubbles. Nanobubbles have very low buoyancy because of their size. However, the aggregated and coalesced microbubbles have size that is more than two orders of magnitude larger and much higher buoyancy.
  • the density difference here is substantially liquid vs. air or gas (large air or gas bubbles).
  • the liquid in the first volume portion 10 the liquid has a relatively longer residence time than in the second volume portion 20.
  • the flow rate in the first volume portion 10 is relatively lower than in the second volume portion 20, which can be embodied by having a first volume portion 10 that is relatively larger than the second volume portion 20 or for example by having a first volume portion 10 with relatively larger cross-section (perpendicular to the flow direction) than the second volume portion 20.
  • FIG. 2 shows a seawater processing system according to an embodiment of the invention.
  • the liquid processing system 100 comprises a secondary ultrasonic acoustic source 40.
  • the secondary ultrasonic acoustic source is arranged at the process inlet conduit 5 and configured for exposing the waste liquid entering from the process equipment/vessel 1 to a secondary acoustic signal in the frequency range above at least 30 kHz and as high as about 3 MHz (adjustable).
  • the frequency can be set in this range depending on the contamination level and volume of the waste liquid to be treated. For very low contamination level, a higher frequency range is used, the secondary acoustic source being configured to generate a second acoustic signal with an adjustable frequency.
  • the second acoustic signal from the secondary acoustic source can be continuous or pulsed depending on the volume of waste liquid to be treated.
  • the pulsed source can be used with adjustable different duty cycles to control the electrical excitation energy and to prevent undesirable heating of the acoustic sources.
  • the secondary acoustic signal has the effect that impurities in the waste liquid are clustered into particles of larger size upon entry of the first volume portion.
  • Clustering the impurities before entering the first volume portion 10 advantageously improves the capture of the impurities by the exposure to the nanobubbles.

Landscapes

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

Abstract

L'invention concerne un système de traitement de liquide comprenant un volume de traitement conçu pour recevoir un liquide contaminé, un dispositif d'alimentation en gaz et une source acoustique ultrasonore. Le volume de traitement comportant une entrée de traitement pour recevoir un liquide et une sortie de traitement pour évacuer l'eau. Le dispositif d'alimentation en gaz est conçu pour fournir un flux d'un gaz au volume de traitement, la source acoustique étant couplée au volume de traitement et conçue pour fournir de l'énergie acoustique au volume de traitement. Le volume de traitement est agencé entre l'entrée de traitement et la sortie de traitement. Le dispositif d'alimentation en gaz est conçu pour fournir un flux de nanobulles au liquide dans le volume de traitement dans un premier mode, les nanobulles présentant un diamètre inférieur ou égal à 250 nm, et pour fournir un flux de microbulles au liquide dans le volume de traitement dans un second mode, les microbulles présentant un diamètre supérieur ou égal à 500 nm, et la source acoustique est conçue pour fournir de l'énergie acoustique dans le liquide dans le second mode par l'intermédiaire d'un couplage acoustique.
PCT/EP2025/050530 2024-01-11 2025-01-10 Système de traitement de liquide et procédé associé Pending WO2025149611A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP24151364.7 2024-01-11
EP24151364 2024-01-11

Publications (1)

Publication Number Publication Date
WO2025149611A1 true WO2025149611A1 (fr) 2025-07-17

Family

ID=89620170

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/050530 Pending WO2025149611A1 (fr) 2024-01-11 2025-01-10 Système de traitement de liquide et procédé associé

Country Status (1)

Country Link
WO (1) WO2025149611A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120085530A1 (en) * 2007-03-28 2012-04-12 Kerfoot William B Treatment for Recycling Fracture Water - Gas and Oil Recovery in Shale Deposits
CN102863039A (zh) 2011-07-08 2013-01-09 蓝星环境工程有限公司 一种加压溶气气浮的多重气泡混合系统
CN111003749A (zh) * 2019-12-31 2020-04-14 湖南景翌湘台环保高新技术开发有限公司 一种抛光液废水除油污装置及方法
US11753313B2 (en) * 2020-11-03 2023-09-12 Virgil Dewitt Perryman, Jr. Rapid evaporation of water for desalination and dewatering using nanobubbles and micro-droplets
CN114040890B (zh) * 2019-07-04 2023-11-21 丹尼尔·特纳 从液体中去除污染物的系统和方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120085530A1 (en) * 2007-03-28 2012-04-12 Kerfoot William B Treatment for Recycling Fracture Water - Gas and Oil Recovery in Shale Deposits
CN102863039A (zh) 2011-07-08 2013-01-09 蓝星环境工程有限公司 一种加压溶气气浮的多重气泡混合系统
CN114040890B (zh) * 2019-07-04 2023-11-21 丹尼尔·特纳 从液体中去除污染物的系统和方法
CN111003749A (zh) * 2019-12-31 2020-04-14 湖南景翌湘台环保高新技术开发有限公司 一种抛光液废水除油污装置及方法
US11753313B2 (en) * 2020-11-03 2023-09-12 Virgil Dewitt Perryman, Jr. Rapid evaporation of water for desalination and dewatering using nanobubbles and micro-droplets

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