EP1874460A1 - Systeme de separation, de coalescence et de sorption reutilisable - Google Patents

Systeme de separation, de coalescence et de sorption reutilisable

Info

Publication number
EP1874460A1
EP1874460A1 EP05735636A EP05735636A EP1874460A1 EP 1874460 A1 EP1874460 A1 EP 1874460A1 EP 05735636 A EP05735636 A EP 05735636A EP 05735636 A EP05735636 A EP 05735636A EP 1874460 A1 EP1874460 A1 EP 1874460A1
Authority
EP
European Patent Office
Prior art keywords
coalescing
aqueous phase
fiber
powder
phase
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.)
Withdrawn
Application number
EP05735636A
Other languages
German (de)
English (en)
Inventor
Raymond Prud'homme
Serge Fraser
Marc Saad
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.)
Torr Canada Inc
Original Assignee
Torr Canada 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 Torr Canada Inc filed Critical Torr Canada Inc
Publication of EP1874460A1 publication Critical patent/EP1874460A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28011—Other properties, e.g. density, crush strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28023—Fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28028—Particles immobilised within fibres or filaments
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/46—Materials comprising a mixture of inorganic and organic materials
    • 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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/681—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of solid materials for removing an oily layer on water

Definitions

  • the present invention relates to sorbing coalescing and separation technology.
  • Patents in the prior art often involve a particulate material for adsorbing or coalescing a non-aqueous phase, typically crude oil or a derivative of it, such as gasoline, diesel fuel, lubricating oil, industrial fluid or bilge water.
  • adsorbents and/or coalescing and/or separating agents include: polyethylene; polypropylene; polyisocyanurate; polyurethane; shreds of solids loaded polyurethane foam; silane cross linked polyolefin; polymethyl methacrylate; shredded fibreglass; wool; cork; styrofoam; polyester and/or cotton.
  • particulate reusable polyurethane adsorbents capable of adsorbing many spilled liquids, and from which the adsorbed liquid can be removed by the simple process of centrifugation.
  • the main limitation on the use of the particulate adsorbents of that invention is the properties of the liquid spilled. Any liquid which would destroy or dissolve a polyurethane polymer cannot be recovered using the product described by Kozlowski.
  • the use of particulate reusable adsorbents, including polyurethane, capable of adsorbing spilled liquids, and from which the adsorbed liquid can be removed by the simple process of centrifugation is also described in the prior art. In other cases, particulate adsorbents are used in continuous separation processes, where the replacement of the coalescing system used in the process is performed after many hours of work.
  • Coalescing media described in the prior art are not designed to support pressure drops and will undergo deformation and compacting when in contact with such a flow.
  • the media reacts to the pressure drop that comes with the constant flow by rearranging itself by physically compacting and leaving more open space for the flow to pass through.
  • the target fluid in the flow will leak from the media and will not have the desired contact with the coalescing media and the non-aqueous phase recovery performance will decrease.
  • McMillen teaches a method for removing emulsified water from a produced crude oil stream by passing the crude oil stream containing emulsified water through a bed of a water-saturated hydrophilic coalescing medium selected from sand, crushed quartz, diatomaceous earth, porous silica and ground walnut shells.
  • a water-saturated hydrophilic coalescing medium selected from sand, crushed quartz, diatomaceous earth, porous silica and ground walnut shells.
  • WO 02/066137 teach a process for separation of oil, water and gas in a separator by breaking water-in-oil emulsions in a composition comprising a water, oil and optionally a gaseous phase, the composition containing inorganic or organic particulate solids.
  • the organic particulate solids are constituted of nanosized asphaltene, metal organic acid, such as calcium naphthenate particles, or wax particles, such as heavy paraffin particles, or mixtures thereof.
  • the inorganic particulate solids are constituted by clay, precipitated metal salt or scale particles such as calcium carbonate, barium sulphate, or mixtures thereof. This invention relies on the inorganic or organic characteristic of the composition rather than containing a powder and a fiber mixed together.
  • US 5,006,260 to Roques et al. teach a process for the separation of one phase dispersed in emulsion or in suspension in a continuous phase of a different density providing a coalescing enclosure having a filling formed of fibers or particles.
  • Fibers are of a material selected from polypropylene, polyethylene, polyamide or polytetrafluoroethylene.
  • the Roques et al. filling has a high coefficient of void and an inherent volume of particles or fibers of less than about 20% of the useable volume of said coalescing enclosure.
  • the filling comprises a plurality of radial fibers connected to a central shaft extending along the axis of the chamber.
  • Ronan et al., US 5,965,015 teach an oil-separator system having a coalescing filter means comprising a glass fiber.
  • Sprenger et al. in US 6,569,330 teach a filter coalescer cartridge for treating jet fuel including a first and a second layer of pleated fiberglass filter media. Although using fibers, both of these patents teach a filter having only one component. The same is true for Yves et al. in US 4,335,001 where a process for the continuous separation of a secondary emulsion of at least one dispersed phase by providing guide means is disclosed.
  • the guide means comprises a packing of a particulate or porous material of high porosity and less density than a bed and being wettable by the dispersed phase wherein the material of the bed comprises glass fibers coated so as to be hydrophobic and the material of the guide means comprises metal fibers coated so as to be hydrophobic.
  • Veronneau et al. PCT/CA2004/000026 describe a reusable sorbing coalescing agent facilitating the separation of a non-aqueous phase from an aqueous phase consisting of a ragged-edge particulate reusable material having substantially small uniform sized particulate units.
  • combinations of two or more different components at least one being a powder and one being a fiber, mixed at a predetermined volume and density ratio range, the components interacting and working together, increase the absorption-coalescing-desorption and separating capabilities of the coalescing media.
  • the structural stability of the media of this invention ensures that the material does not change in dimension and keeps its properties notwithstanding a certain pressure drop. In particular, it ensures that the emulsion does not tend to avoid the medium, and effectively go around it. A result of the diversion of the emulsion that otherwise occurs is that more stages need to be used to get the same effective performance.
  • Solid separation methods known in the art are mainly conventional filtration using bag filters, meshes or paper filters. Other methods use gravity as a separation factor and also centrifugation, such as in the hydrocyclone centrifugation. The higher the flow and/or the smaller the particle, the more difficult it is to separate the solids from a flow.
  • Gravity is not an efficient method of separation as its efficiency is very low, especially when the density of the particles is the same or a lower density than the aqueous emulsion.
  • Hydrocyclone technology although more efficient, still requires considerable energy to apply the same control as in conventional filtration. Furthermore, in the hydrocyclone method, separation will generally separate the solid particles or the non-aqueous phase but not both at the same time.
  • the present invention seeks to provide a substantially self-cleaning reusable sorbing coalescing system facilitating the separation of a non-aqueous phase from an aqueous phase comprising a combination of at least two different particulate materials, one being a fiber and the other one being a powder mixed at a predetermined volume and density ratio range, wherein the proportion between the powder and the fiber vary from about 50%-50% to about 90%-10% powder-fiber, and wherein the combination of the powder and the fiber in the system contains from about 5% to about 50% free space.
  • the present invention also seeks to provide a substantially self-cleaning reusable sorbing coalescing system facilitating the separation of a system containing at least two phases comprising: a. a non-aqueous phase; b. an aqueous phase; and c.
  • a third optionally disperse particulate solid phase wherein the coalescing system comprises a combination of at least two different particulate materials, one being a fiber and the other one being a powder mixed at a predetermined volume and density ratio range, and wherein the proportion between the powder and the fiber vary from about 50%-50% to about 90%-10% powder-fiber, and wherein the combination of the powder and the fiber in the system contains from about 5% to about 50% free space, and wherein the nonaqueous phase and the third disperse particulate solid phase are recovered as one non-aqueous phase.
  • the purpose of this invention is to increase the mechanical properties of the media, and to increase the absorption-coalescing-desorption capabilities of the media.
  • the coalescing media can be composed of raw materials other than polymers.
  • the coalescing medium is intended to include application at high temperatures up to at least 250 0 C.
  • any materials that are hydrophobic, oleophilic and that can be transformed to a powder or fiber can be used to manufacture the coalescing agent of this invention.
  • one or all components can be a polymer.
  • FIGURE 1 shows a performance of the coalescing system operating with six stages, in terms of reduction of the oil concentration in the flow in comparison with the performance of a media comprising only powder.
  • FIGURE 2 shows an average data on oil and solids particle concentration analysis throughout the coalescing system and at the inlet and outlet of the media.
  • the present invention seeks to provide a substantially self- cleaning reusable sorbing coalescing system facilitating the separation of at least one non-aqueous phase from an aqueous phase comprising at least two different particulate materials, one being a fiber and the other one being a powder mixed at a predetermined volume and density ratio range.
  • the present invention seeks to provide substantially self-cleaning reusable sorbing coalescing system facilitating the separation of a system containing at least two phases comprising: a) a non-aqueous phase; b) an aqueous phase; and optional c) a third disperse particulate solid phase; wherein the coalescing system comprises a combination of at least two different particulate materials, one being a fiber and the other one being a powder mixed at a predetermined volume and density ratio range, and wherein the nonaqueous phase and the third disperse particulate solid phase are recovered as one non-aqueous phase.
  • a fiber By adding a fiber to a coalescing media including a powder the mechanical properties of the media do not change and the absorption-coalescing- desorption and separating capabilities of the coalescing system are increased.
  • the selection of the fiber gives strength when mixed with the powder medium, and provides a three dimensional structure, which resists destruction or damage and permits the emulsion to continue to flow through the medium rather than around it.
  • the combination of a fiber and a powder and its characteristics will increase the capabilities of the coalescing system.
  • the fiber will give strength to the system, almost completely avoiding system deformation and compacting and consequently avoiding fluid leaking.
  • the fiber will increase the mechanical properties of the system, which will increase the coalescing properties.
  • a third optionally disperse particulate solid phase is present in the emulsion, either in the aqueous phase or non-aqueous phase, it is possible to adjust such proportion in order to permit the capture of a very small droplet of the non-aqueous phase together with very small solid particles therein.
  • the non-aqueous phase and the disperse particulate solid phase are recovered as one non-aqueous phase.
  • the solid particles attach to the non-aqueous phase and can then be disposed of with the oil or can be subjected to further processing.
  • the two or more different components are mixed at a predetermined volume and density ratio range, the components interacting and working together to increase the absorption- coalescing-desorption separation capabilities of the coalescing system.
  • the coalescing system can be composed of raw materials other than polymers. In fact any materials that are hydrophobic, oleophilic and that can be transformed to a powder or fiber can be used to manufacture the coalescing agent.
  • the proportion between the powder and the fiber may vary from about 50%- 50% to 90%-10% powder-fiber. Although the proportion of powder-fiber may vary, preferably the system comprises an equal proportion between both or comprise more powder than fiber.
  • the combination of the powder and the fiber in the system may vary from about 5% to about 50% free space.
  • the powder component be the reusable sorbing coalescing agent as described in co-pending application PCT/CA2004/000026.
  • leak and "leaking” in this application is described as fluid that can go through a channel, or an open space, that is large enough that oil droplets passing therethrough avoid contact of oil droplets with the media.
  • reusable for the purpose of this application refers first to a substantially self-cleaning material, dispensing with the need for any kind of interruption to perform a cleaning step and thus enabling a continuous usage until its recommended disposal, and second to material which suffers no significant degradation with successive use, thus dispensing with the need for a replacement each time it is used.
  • aqueous phase and the non-aqueous phase are absorbed into porous sorbent materials or into particulate material spaces.
  • coalescing for the purpose of this application refers to a process that causes one substance to be attracted to and stick to the surface of another substance, without actually penetrating its surface.
  • the coalescing systems of this invention present high surface/volume ratios, substantially no shiny surface, affinity with oil, hydrophobic properties, porous, broken cells, small particles and fibrous edges.
  • the media of this system is packed in a non-organized manner to force the fluid to continuously change direction when passing through the system.
  • Powders are not shiny and present excellent chemical properties.
  • Fibers are generally shiny and generally lack the desirable chemical properties to work in a coalescing system if used alone or unaccompanied by a powder.
  • a coalescing media is a media placed in a constant flow and must have better characteristics than those of a static media.
  • the coalescing systems of this invention keep their density over time without deforming under small pressure (up to 7 PSI).
  • the components of systems also maintain an ability to force the fluid to go through them and not around them while coalescing.
  • the powder mostly treats the non-aqueous phase and the fiber mostly provides mechanical support to the system. It has been observed that the fiber alone will not work properly. Use of the powder alone works well but not as well as is desired for a coalescing system and its efficiency degrades over time. In this invention it is proven that a mix of the two, a fiber and a powder provides an unexpectedly better result.
  • composition of the system or the characteristic of each of the components of the system can be changed to adapt the system to different types of targeting flows and to reach a predetermined target.
  • changes that could be made to the system include those of a stiffer fibre to avoid deformation under higher pressure.
  • the powder size or powder concentration could be altered or reduced to allow solids to go trough.
  • proportion of the components could be adjusted to better capture solid particles by attaching them to the non-aqueous phase that will be separated from the aqueous phase.
  • a fiber and a powder suitable for applications at high temperature could also be selected.
  • the coalescing action of the system provides for a flow rate ranging from a very low flow rate up to 80 cubic meter per hour per square meter across a bed area of particulate material of 1 square meter and results in a reduction of oil-in-water content ranging from 2000 ppm to less than 10ppm respectively. Reduction of oil-in-water content in flow rates outside this range is possible.
  • the presently preferred flow rate is between 15 rr ⁇ /h/m 2 and 40 nr ⁇ /h/m 2 .
  • the particulate sorbing coalescing agent's reduction rate can achieve high degreees of separation as can be seen in Figures 1 and 2.
  • Figure 1 there is shown a graph of the performance of the coalescing system operating with six stages of the coalescing system in terms of reduction of the oil concentration in the flow.
  • the Figure indicates an oil concentration reduction from 2226.84 ppm down to 0.23 ppm.
  • the system of the present invention comprising a combination of at least two different particulate materials, one being a fiber and the other one being a powder shows much better performance of the compound with the performance of a media comprising only powder, as showed in Figure 1.
  • the particles are not simply being filtered out, as described in the known solid separate methods. Rather the particles are being redirected outside of the aqueous flow, together with the non-aqueous phase, for further separation from the non-aqueous phase if necessary or desired.
  • This mechanism has the advantage of separating very small solid particles or particles having the same or a lower density than of the aqueous emulsion.
  • system separates the non-aqueous phase and the solid particles from the non-aqueous phase particles simultaneously, without the use of additional equipment.
  • the system of this invention supports high pressure drops and can be arranged to accept different types of emulsion flows.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

L'invention concerne un système de coalescence et de sorption réutilisable sensiblement autonettoyant qui facilite la séparation d'un système contenant au moins deux phases, à savoir : a) une phase non aqueuse et b) une phase aqueuse. Eventuellement, une troisième phase solide particulaire dispersée peut être également présente et séparée avec la phase non aqueuse. Ce système de coalescence comprend une combinaison d'au moins deux matières particulaires différentes, l'une étant une fibre et l'autre une poudre mélangée selon une plage de rapports de volume et de densité prédéterminée. La phase non aqueuse et la troisième phase solide particulaire dispersée sont récupérées en tant que phase non aqueuse.
EP05735636A 2005-04-18 2005-04-18 Systeme de separation, de coalescence et de sorption reutilisable Withdrawn EP1874460A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA2005/000585 WO2006110972A1 (fr) 2005-04-18 2005-04-18 Systeme de separation, de coalescence et de sorption reutilisable

Publications (1)

Publication Number Publication Date
EP1874460A1 true EP1874460A1 (fr) 2008-01-09

Family

ID=37114642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05735636A Withdrawn EP1874460A1 (fr) 2005-04-18 2005-04-18 Systeme de separation, de coalescence et de sorption reutilisable

Country Status (3)

Country Link
EP (1) EP1874460A1 (fr)
CA (1) CA2606141A1 (fr)
WO (1) WO2006110972A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2592190A1 (fr) * 2007-06-18 2008-12-18 Torr Canada Inc. Agent coalescent

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212733A (en) * 1977-12-27 1980-07-15 Somar Manufacturing Co., Ltd. Oil-water separation filters
US5328758A (en) * 1991-10-11 1994-07-12 Minnesota Mining And Manufacturing Company Particle-loaded nonwoven fibrous article for separations and purifications
JPH11156104A (ja) * 1997-11-21 1999-06-15 Seiren Co Ltd 油水分離フィルターとその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006110972A1 *

Also Published As

Publication number Publication date
WO2006110972A1 (fr) 2006-10-26
CA2606141A1 (fr) 2006-10-26

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