EP1952889A1 - Trennung und kontinuierliche Ausscheidung von flüssigen anorganischen Gemischen durch Zentrifugieren - Google Patents

Trennung und kontinuierliche Ausscheidung von flüssigen anorganischen Gemischen durch Zentrifugieren Download PDF

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Publication number
EP1952889A1
EP1952889A1 EP08300058A EP08300058A EP1952889A1 EP 1952889 A1 EP1952889 A1 EP 1952889A1 EP 08300058 A EP08300058 A EP 08300058A EP 08300058 A EP08300058 A EP 08300058A EP 1952889 A1 EP1952889 A1 EP 1952889A1
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EP
European Patent Office
Prior art keywords
bowl
product
contaminants
centrifugation
periphery
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Withdrawn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
EP08300058A
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English (en)
French (fr)
Inventor
Pierre Barere
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.)
OPTA PERIPH
Original Assignee
OPTA PERIPH
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 OPTA PERIPH filed Critical OPTA PERIPH
Publication of EP1952889A1 publication Critical patent/EP1952889A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/005—Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/06—Fluid drive

Definitions

  • the present invention falls within the field of separating contaminants contained in a product.
  • the invention relates to the elimination of inorganic compounds, such as water, and sediment (soot, tar or other various particles) present within said product. Sediment particles are suspended while the water is present in undissolved form, therefore closely related to said product.
  • inorganic compounds such as water, and sediment (soot, tar or other various particles) present within said product. Sediment particles are suspended while the water is present in undissolved form, therefore closely related to said product.
  • the present invention will find a preferential application in the sampling of organic product, more specifically within the refining and petrochemical trades.
  • the separation of said suspended contaminants in the product is carried out by filtration of the sediments and coalescence of the water globules, with separation under the effect of gravity.
  • coalescers are only suitable for low viscosity white hydrocarbons (up to 20 centistokes (cSt) at a temperature of 50 ° C) and may not be suitable for brown products such as crude oil, oils and residues of higher viscosity (up to 1000 cSt for a temperature above 50 ° C).
  • cSt centistokes
  • brown products such as crude oil, oils and residues of higher viscosity (up to 1000 cSt for a temperature above 50 ° C).
  • the maintenance of such devices is often complex and costly, especially for the maintenance or replacement of filters.
  • centrifuges operate at atmospheric pressure.
  • a known centrifuge has been equipped on a diesel-powered truck engine to remove sediment from it.
  • such a device is not suitable for taking a sample free of water.
  • this centrifuge creates a risk of separation of volatile fractions for a fluid in the mixed phase, as is the case of a light hydrocarbon, such as gasoline.
  • centrifuge allows the removal of sediments and finds its application in the storage of marine diesel. But such a device also includes a bowl maintained at atmospheric pressure so that it can not be suitable for a gasoline containing light fractions.
  • centrifuges aim to evacuate only the sediments.
  • documents FR 2,607,028 , FR 2 302 140 and GB 969 179 describe the operation of self-debugging centrifuge bowl in which are collected solid particles that should be evacuated. Again, these devices ignore the extraction of water particles and operate at atmospheric pressure.
  • Centrifuges existing on the market can not satisfy the application of the invention, it was devised a variant for separating under pressure contaminants contained in a sample, solid and especially liquid contaminants.
  • the invention therefore aims to overcome the drawbacks of the state of the art by proposing a method of separation by centrifugation under pressure of the contaminants contained in a product.
  • the present invention relates to a process for the continuous separation of liquid contaminants contained in a product that may be in a mixed phase, characterized in that it consists in separating under pressure said liquid contaminants present in said product by centrifugation within a movable portion in the form of a bowl (5) and to evacuate said liquid contaminants through cells on all or part of the periphery of said bowl.
  • centrifuge device for carrying out such a method, comprising a hermetic enclosure maintained under pressure and provided with means for continuous separation by centrifugation of said liquid contaminants contained in said product, said separation means comprising a part mobile in the form of a bowl inside which are provided an injection inlet of said product and a discharge outlet of the clarified product, characterized in that it comprises means for peripheral evacuation of liquid contaminants under the shaped cells distributed over all or part of the periphery of said bowl.
  • said separation means comprise a mobile part in the form of a bowl inside which are provided an injection inlet of said product and an outlet for discharging the clarified product.
  • said evacuation means comprise at least one groove capable of channeling said contaminants, such as water, and to tranquilize the flow of other contaminants, such as sediments.
  • said separating means comprise a cover adapted to drive and guide said product towards the periphery of said bowl through pallets.
  • said inlet is located in the lower part of said bowl, while said outlet is in the upper part of said bowl.
  • said inlet and outlet are formed through a fixed shaft.
  • the present invention relates to the separation of contaminants, solid and liquid, contained in a product that can be in mixed phase at atmospheric pressure.
  • the invention consists in separating under pressure by centrifugation said liquid contaminants present in said product.
  • the product is advantageously in the form of a fluid, such as a liquid containing said contaminants.
  • this fluid separates into at least two distinct phases, a heavier first phase migrating at the periphery and a second, lighter and representative of the clarified sample, forming a central vein 3.
  • the first phase comprising the contaminants is ejected under the effect of the centrifugal force at the periphery of the centrifuge 2 while the clarified product is taken under pressure at the central vein 3 in the upper part 4.
  • this separation is carried out by centrifugal separation means of said contaminants contained in said product.
  • these separation means are rotatably mounted in said enclosure 1 and make it possible to clarify the product injected inside the enclosure 1 by separating it into two phases.
  • the separation means comprise a mobile part 5, called “bowl”, inside which is injected and discharged said product.
  • This movable portion 5 is rotatably mounted relative to a fixed shaft 23 extending along an axis AA 'transversely passing through said chamber 1.
  • the product is directly injected and then evacuated within this moving part 5, reciprocally through a entrance 6 and exit 7.
  • Said inlet 6 and outlet 7 are located at said shaft 23. They are each in the form of a coaxial channel 8 formed from one end of said shaft 23 to an orifice 9 opening laterally inside said bowl 5.
  • the inlet channel 6 is located in the lower part of the bowl 5 while the outlet channel 7 is located in the upper part 4, as visible on the figures 1 and 3 .
  • the chamber 1 and the bowl 5 are bell-shaped, with a smaller diameter at the outlet 7 than at the inlet 6, so as to guide the fluid at the central vein 3 towards said outlet 7.
  • the moving part 5 has an inverted dome shape.
  • the separation means comprise a lid 11 mounted integral with means 12 for receiving contaminants.
  • These receiving means 12 may be in the form of a container in which accumulate solid contaminants, such as sediments.
  • An advantage of such receiving means 12 lies in the fact that they store the residues without reducing the operation of the device.
  • the separating means comprise means 13 for peripheral evacuation of liquid contaminants.
  • These evacuation means 13 may be in the form of cells distributed over all or part of the periphery of said bowl 5. These cells advantageously serve to extract towards the outside of the mobile part 5 the heavier contaminants, such as the water, projected on the periphery.
  • These cells may be made of any size but, according to a preferred embodiment, they are hollowed by laser drilling on all or part of the periphery of the bowl 5. They have a diameter of the order of several hundredths of a millimeter. More specifically, one embodiment gives particularly satisfactory results with cells having a diameter of 0.07 mm.
  • the bowl 5 also includes a lid.
  • the latter consists of a disc 14 whose periphery comprises means 15 for fixing said receiving means 12 so as to form said bowl 5.
  • These fixing means 15 may be in any form so as to maintain said lid 11 and said receiving means 12 integral with each other.
  • said fixing means 15 are in the form of bores regularly distributed around the periphery and facing said receiving means 12 and said cover 11. These bores are intended to receive screws, nuts or the like. Balancing of the assembled lid 11 and bowl 5 is then performed with the assembly rotated by a motor through a movable shaft 24 secured to said bowl 5.
  • the cover 11 is fixed on the bowl 5 and the assembly is rotated.
  • the inlet 6 and outlet 7 of the product to be sampled are produced by coaxial bores in the fixed shaft 23.
  • the latter is rotatably mounted in a bore 25 formed coaxially with the movable shaft 24.
  • the seal between the two fixed shafts 23 and mobile 24 is made through at least one rotating joint 27.
  • the fixed shaft 23 comprises channels 8 for injecting and discharging the product extending parallel to the interior of said shaft 23 from its lower end 26.
  • Said inlet 6 and outlet 7 open laterally at different heights, said inlet 6 opening preferably under the outlet 7.
  • the movable shaft 24 comprises vis-à-vis the inlet 6 and outlet 7 the ends of the reciprocally inlet ducts 28 and outlet 29, the opposite ends of these throats opening inside the bowl 5.
  • the inner end of said ducts 28 and 29 may comprise a groove on all or part of the inner circumference of the bore 25 of the rotating shaft 24 or all or part of the outer periphery of the fixed shaft 23. This groove is formed circularly over the wider section of the ducts 28 and 29 to improve the injection and evacuation of the product reciprocally from and to the inlet 6 and the outlet 7.
  • the motor is of the pneumatic type and able to operate at variable speeds and speeds, in a nonlimiting manner, of the order of 5,000 to 7,000 revolutions per minute.
  • the lid 11 also comprises drive means 16 for rotating the liquid in order to optimize the centrifugal effect and thus allow the ejection of the liquid contaminants through said cells, the sediment remaining in the bottom of the bowl.
  • These guide means 16 are preferentially in the form of vanes 17 distributed radially with respect to said cover 11, on the disk 14.
  • each pallet 17 consists of a plate integral with and orthogonal to the plane of said cover 11. perpendicular to said disk 14.
  • each pallet 17 is constituted by a rectangular plate fixed perpendicularly to the disc 14 and tangentially positioned, in particular at one of its ends, to a circle concentric or not with respect to said disc 14. arranged in the form of a ratchet wheel or a spiral. This particular configuration guides the fluid towards the periphery of the mobile part 5.
  • these channeling means make it possible to guide the heavy inorganics, such as water. They thus tranquilize their flow to said cells.
  • these channeling means are in the form of a groove 18 formed at the periphery of said bowl 5.
  • This groove 18 is located in a higher position than the inlet port 6 for injecting the sample.
  • the groove 18 may be at a height of 4 mm from the bottom of said bowl 5.
  • the clarified product is recovered and evacuated under pressure from the central vein 3 to the upper level 4 of the bowl 5 while the heavy contaminants are expelled at the periphery under the action of the centrifugal force. Thanks to the guiding means 16 towards the channel groove 18 and the cells, the liquid contaminants, such as water, are expelled outside the mobile part 5, while the sediments stagnate at the bottom of said bowl 5.
  • Such a separation of contaminants present in a fluid will find particular application in the context of mixed phase sample decontamination in a continuous online analysis, for example in the fields of refining and petrochemistry.
  • the present invention is particularly aimed at hydrocarbon sampling.

Landscapes

  • Centrifugal Separators (AREA)
EP08300058A 2007-01-30 2008-01-30 Trennung und kontinuierliche Ausscheidung von flüssigen anorganischen Gemischen durch Zentrifugieren Withdrawn EP1952889A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0752953A FR2911800B1 (fr) 2007-01-30 2007-01-30 Separation et elimination en continu des composes inorganiques liquides par centrifugation

Publications (1)

Publication Number Publication Date
EP1952889A1 true EP1952889A1 (de) 2008-08-06

Family

ID=38481930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08300058A Withdrawn EP1952889A1 (de) 2007-01-30 2008-01-30 Trennung und kontinuierliche Ausscheidung von flüssigen anorganischen Gemischen durch Zentrifugieren

Country Status (2)

Country Link
EP (1) EP1952889A1 (de)
FR (1) FR2911800B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117138980A (zh) * 2023-07-12 2023-12-01 甘肃中油特油润滑科技开发有限公司 一种兼有搅拌混合和离心功能的离心机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB969179A (en) 1962-05-17 1964-09-09 Baram Martin Improvements in methods of and means for controlling the discharge of sludge from rotary centrifugal separator bowls
FR2302140A1 (fr) 1975-02-27 1976-09-24 Westfalia Separator Ag Bol centrifuge hermetique a auto-debourbage
FR2607028A1 (fr) 1986-06-24 1988-05-27 Westfalia Separator Ag Bol centrifuge
US6095964A (en) 1995-12-23 2000-08-01 The Glacier Metal Company Limited Centrifugal separator with weight thrust bearing
WO2006096113A1 (en) 2005-03-08 2006-09-14 Alfa Laval Corporate Ab A centrifugal separator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB969179A (en) 1962-05-17 1964-09-09 Baram Martin Improvements in methods of and means for controlling the discharge of sludge from rotary centrifugal separator bowls
FR2302140A1 (fr) 1975-02-27 1976-09-24 Westfalia Separator Ag Bol centrifuge hermetique a auto-debourbage
FR2607028A1 (fr) 1986-06-24 1988-05-27 Westfalia Separator Ag Bol centrifuge
US6095964A (en) 1995-12-23 2000-08-01 The Glacier Metal Company Limited Centrifugal separator with weight thrust bearing
WO2006096113A1 (en) 2005-03-08 2006-09-14 Alfa Laval Corporate Ab A centrifugal separator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117138980A (zh) * 2023-07-12 2023-12-01 甘肃中油特油润滑科技开发有限公司 一种兼有搅拌混合和离心功能的离心机

Also Published As

Publication number Publication date
FR2911800B1 (fr) 2010-08-20
FR2911800A1 (fr) 2008-08-01

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