WO2011000044A1 - Oil/water separation process and apparatus - Google Patents
Oil/water separation process and apparatus Download PDFInfo
- Publication number
- WO2011000044A1 WO2011000044A1 PCT/AU2010/000834 AU2010000834W WO2011000044A1 WO 2011000044 A1 WO2011000044 A1 WO 2011000044A1 AU 2010000834 W AU2010000834 W AU 2010000834W WO 2011000044 A1 WO2011000044 A1 WO 2011000044A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- water
- mixture
- separator
- separation
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/16—Refining fats or fatty oils by mechanical means
-
- 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
- B01D17/04—Breaking emulsions
- B01D17/045—Breaking emulsions with coalescers
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
Definitions
- the present invention relates to a method and apparatus for the separation of oil from water.
- the method and apparatus of the invention is of particular relevance in the separation and refining of palm oil from water.
- the method and apparatus of the invention have a wide applicability in the use of separating oil/water mixtures.
- Oil Palm which originated in Africa, exists in wild, semi- wild and cultivated land areas of the equatorial tropics of Africa, South East Asia and South America. At the present time, the oil palm is cultivated over a wide range of tropical climatic conditions and soil types.
- the palm oil milling process has not changes significantly over the last 80 years, although over the last 15 years there has been significant investment by the Malaysian government, private investors and commercial businesses to overcome inherent process problems and increase processing efficiencies without a noticeable success.
- the palm oil milling process known in the art, comprises the major steps of: preparing fresh fruit bunches (FFB), digestion, oil extraction, oil clarification, sludge separation and kernel separation.
- FFB fresh fruit bunches
- the typical processing steps for extraction of palm oil from harvested fruit is described in some detail in US patent number 5039455.
- known mill designs include very large waste water lagoons with long retention times. This has meant that unless the dam sizes are significantly increased there is no opportunity for them to expand their production throughput. Furthermore, dams require frequent maintenance to sustain their performance thereby adding to the overall refining cost.
- the existing technology is known to be generally inefficient and wasteful of resources.
- this process splits the three phases present - oil, water and solids.
- the reality and main issue is the presence of a fourth layer, sometimes referred to as the "X-layer".
- the fourth layer is formed by the fine fibres, and light solids and particulate matter which does not readily separate and settle to the bottom of the clarifying tank.
- the buoyancy of this layer is added to by the rising oil which becomes “captured” below and within the mat of small and lightweight fibres.
- the oil within this layer will take extended lengths of time to be separated, if it is separated from the solids, thus its quality is greatly reduced by extensive oxidation.
- a separator plate for use in an oil/water mixture separation environment, said separator plate characterised by:
- a rigid body including a generally planar surface which encourages coalescing of said oil
- baffles extending at least partially across said planar surface and generally outwardly therefrom, said baffles providing an additional coalescing surface.
- said separator plate further includes a means of interconnecting with a further separator plate such that when said separator plates are interconnected they extend
- interconnection means takes the form of interconnecting lugs that mate with corresponding sockets on adjacent separator plates.
- separator plate further includes a means of stacking one or more separator plates to form an array of separator plates.
- said rigid body further includes two upstanding outermost walls between which said planar surface extends to thereby form an elongated I-shaped structure.
- said means of stacking plates is in the form of locating pins adapted to interconnect with a corresponding locating hole that can be found in each wall.
- the locating pins are positioned parallel to the separator plate wall midway between upper and lower edges of the walls and each locating pin connecting with one of a pair of locating holes therein positioned parallel to a separator plate wall midway between upper and lower edges of the walls and each locating pin connecting with one of a pair of locating holes therein positioned either side of a midway point between the upper and lower edges of the wall in an offset fashion to thereby facilitates the stacking of a series of plates.
- said baffles extend sequentially from opposed outermost walls, each baffle extending across said planar surface to a location short of the opposed wall.
- a separating apparatus for use in the separation of oil/water mixtures, said apparatus characterised by one or more separator plates each consisting of a wide central web and outermost upstanding side walls forming a generally shallow open channel and a series of generally transverse baffle members located within the channel formed by the web for encouraging coalescing of oil as the oil/water mixture moves across said plate.
- the one or more separator plates are connected in series, to create an extended coalescing surface, and wherein the series of connected separator plates are arranged in a zigzag fashion.
- said apparatus includes a plurality of horizontally stacked separator plates connected in series and arranged in a zig zag formation, forming a separator array.
- said separating apparatus includes two vertically disposed arrays.
- the upper of said arrays is eight plates deep, and the lower of said arrays is six plates deep, each of said plates being arranged in a zig zag formation.
- baffles extend sequentially from opposing side walls of the central web, and each baffle projects approximately two thirds of the distance across the web between the walls.
- a coalescing separation tank adapted to receive raw product, said tank including at least one set of laminar plates through which said mixture rises, said laminar plates configured to encourage coalescing of oil present in said mixture.
- said plant further includes a means of retrieving oil from the top of the separation tank.
- said plant further includes one or more filters through which water from the bottom of the separation tank is processed to produce substantially oil and particulate free water.
- the plant further includes a means of washing the rising oil/water mixture in the separation tank using said filtered water by introducing said water to the separation tank in an opposite direction to the rising mixture.
- said plant further includes a settling tank into which solids and water which settle at the bottom of the separation tank are fed.
- said plant further includes one or more filters through which water from the bottom of the settling tank is processed to produce substantially oil and particulate free water.
- said plant further includes a means of washing the rising oil/water mixture in the separation tank using said filtered water by introducing said water to the separation tank in an opposite direction to the rising mixture.
- said one or more filters includes a de-watering filter and a cross flow micro filter.
- Preferably said process includes the further step of retrieving oil from the top of the separation tank.
- said process includes the further step of filtering water from the bottom of the separation tank to produce substantially oil and particulate free water.
- said process includes the further step of washing the rising oil/water mixture in the separation tank using said filtered water by introducing said water to the separation tank in an opposite direction to the rising mixture.
- said process includes the further step of feeding solids and water which settle at the bottom of the separation tank into a settling tank.
- said process includes the further step of filtering water from the bottom of the settling tank to produce substantially oil and particulate free water.
- Preferably said process includes the further step of washing the rising oil/water mixture in the separation tank using said filtered water by introducing said water to the separation tank in an opposite direction to the rising mixture.
- each separator plate consisting of a generally shallow three sided open channel having a wide central web, outermost upstanding side walls, a series of generally transverse baffle members located within the channel formed by the web, whereby a plurality of separator plates may be connected in series as to create an extended separation surface, and wherein the series of connected separator plates are arranged in a zigzag fashion to form the array; b) allowing the mixture to rises up the underside of the separator plates and washing the mixture with water flowing in the opposite direction in counter current fashion; and c) collecting a separated oil product from the top of the array.
- each separator plate consisting of a generally shallow three sided open channel having a wide central web, and outermost upstanding side walls, a series of generally transverse baffle members located within the channel formed by the web, whereby a plurality of separator plates may be connected in series as to create an extended separation surface, and wherein the series of connected separator plates arranged in a zigzag fashion to form the array;
- Figure 1 illustrates in front and rear perspective views a separator plate forming a part of an oil/water separator in accordance with the present invention
- Figure 2 illustrates schematically in cross-section an arrangement of a plurality of
- Figure 3a illustrates a front view an oil/water separator including the plates of figure 1;
- Figure 3b illustrates a right hand side view of the oil/water separator of Figure 3a.
- Figure 4 illustrates in block schematic form a palm oil processing arrangement
- the present invention relates to an improved method of oil clarification, a separator plate
- FIG. 1 Shown in figure 1 is a separator plate 10 in accordance with the present invention, the purpose for which will become apparent.
- the plate 10 consists of a generally three surfaces, a wide central web 12 and two outermost upstanding walls 14 forming a stretched I-shaped structure.
- the space between the walls defines a shallow, open channel and located within the channel on one side (the underside when arranged according to the present invention) of web 12 are a series of generally transverse baffle members 16.
- the baffles 16 extend sequentially from opposing side walls 14, each baffle 16 extending to a location short of the opposing wall.
- the spacing of the baffle members 16 may vary subject to the nature of any liquids being separated.
- the distance between adjacent baffle members may be varied, as may the length of any baffle member, and the gap between a baffle member and the opposing wall 14, all such variations being comprehended within the scope of the invention.
- the separator plates 10 also include connection means to allow individual plates 10 to be connected to one another to form a separation array.
- the connection means takes the form of interconnecting lugs that mate with corresponding sockets.
- the upper and lower edge of each upstanding wall 14 is cut by 45 degrees.
- the plate 10 in the upper drawing of figure 1 was tilted such that the top of the plate was rotated out of the page by 45 degrees, and the top of the plate 10 in the lower drawing of figure 1 was tilted into the page by 45 degrees, the lower edge of walls 14 of the upper plate 10 would extend parallel with the upper edge of walls 14 of the lower plate 10, which would enable engagement between the associated lugs and sockets.
- the baffles 16 of the upper plate extend generally downwardly
- the baffles 16 of the lower plate also extend generally downwardly
- the two plates would extend perpendicularly to one another in a vertical zigzag formation. This is shown clearly in figure 2.
- two separator plates, when connected end to end in series fashion are able to pivot relative to one another.
- the separator plates 10 also contain stabilising connector means 24 to permit stacking of an array of plates.
- the stabilising connector means 24 takes the form of locating pins depending downwardly from walls 14 of the plate 10 (when in the zigzag formation described above) that interconnect with a locating hole 26 that can be found in each wall 14.
- the locating pins 24 are generally positioned parallel to the wall 14 midway between upper and lower edges of the wall 14.
- FIG. 10 illustrates how both pairs of holes 26 are utilised when the plates 10 are arranged in the zigzag formation of the present invention.
- This offset connection facilitates the stacking of a series of plates in the zigzag array shown in the oil/water separator 11 of figures 3a, 3b and figure 4.
- the arrangement of plates 10 shown in the drawings can thus be used in a way that ensures that liquid encountering the separator is presented with a large surface area over which oil/liquid separation can take place.
- the design allows for oil to gather on the underside of the plates 10 and grow in size until such time as it moves along and up the baffles 16 to the top of the separator 11.
- the baffles extend on a slight angle to promote the rise of oil in this manner.
- Figure 4 illustrates schematically a palm oil processing facility 28 including a separator
- the raw product from the screw press (not shown) is measured for water content, adjusted and fed into the coalescing three phase separation tank 11.
- the raw product from the screw press (not shown) is measured for water content, adjusted and fed into the coalescing three phase separation tank 11.
- the tank, 11 includes an array of separator plates 10 formed in accordance with the invention.
- the tank 11 has two sets of separator plates 10 with the product being fed between both sets.
- the plates are spaced at 22mm and set at an angle of 45 0 C, and are 300mm wide and 250mm high, they are set out in a zigzag formation.
- 4000Kg/hr solids are removed and are subsequently fed to a settling tank 36 and 4000 Kg/hr of cleaned oil is removed.
- the oil removed from the top of the separator 11 is subject to an oil filtration through a 5 micron oil filter 38 and is subsequently vacuum-dried in a dryer 40 to produce the final product which is a finished high grade oil.
- Water from the bottom of the settling tank 36 is fed into a 60 micron dewatering filter 42, and, in turn, water from the dewatering filter 42 is fed to a further water or cross flow filter 44 (including 0.3 micron metallic membrane), and also returned to the suction side of the raw product feed pump where it is used to dilute the raw product. Solids discharged from the retentate side of the cross flow filter 44 are fed back to the dewatering filter. Filtrate from the cross flow filter 44 is oil and particulate free. This water is fed back to three phase separation tank 11 and forms the counter current wash water to form a three phase split between water, oil and solids. Excess water goes to the waste water storage lagoons. This oil clarification process is thus a closed circuit system providing a number of distinct advantages over traditional oil room operations, including but not limited to:
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fats And Perfumes (AREA)
- Removal Of Floating Material (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2010268768A AU2010268768B2 (en) | 2009-06-30 | 2010-06-30 | Oil/water separation process and apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2009903022 | 2009-06-30 | ||
AU2009903022A AU2009903022A0 (en) | 2009-06-30 | Oil/Water Separation Process and Apparatus |
Publications (1)
Publication Number | Publication Date |
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WO2011000044A1 true WO2011000044A1 (en) | 2011-01-06 |
Family
ID=43410369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2010/000834 WO2011000044A1 (en) | 2009-06-30 | 2010-06-30 | Oil/water separation process and apparatus |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11939233B2 (en) | 2021-12-10 | 2024-03-26 | Saudi Arabian Oil Company | Oil-water separation system using hydrophobic/hydrophilic materials for capacity increase and improving produced water quality |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2042356A (en) * | 1979-01-31 | 1980-09-24 | Pielkenrood Vinitex Bv | Device for separating palm oil from water |
GB1604968A (en) * | 1978-05-31 | 1981-12-16 | Fs Fluid Separation Ltd | Separator apparatus and separator plates therefor |
GB2195554A (en) * | 1986-07-21 | 1988-04-13 | Brian Denis Waring | Ridged plate separator |
SU1542570A1 (en) * | 1988-05-26 | 1990-02-15 | Всесоюзный научно-исследовательский институт по сбору, подготовке и транспорту нефти и нефтепродуктов | Separation installation |
-
2010
- 2010-06-30 WO PCT/AU2010/000834 patent/WO2011000044A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1604968A (en) * | 1978-05-31 | 1981-12-16 | Fs Fluid Separation Ltd | Separator apparatus and separator plates therefor |
GB2042356A (en) * | 1979-01-31 | 1980-09-24 | Pielkenrood Vinitex Bv | Device for separating palm oil from water |
GB2195554A (en) * | 1986-07-21 | 1988-04-13 | Brian Denis Waring | Ridged plate separator |
SU1542570A1 (en) * | 1988-05-26 | 1990-02-15 | Всесоюзный научно-исследовательский институт по сбору, подготовке и транспорту нефти и нефтепродуктов | Separation installation |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11939233B2 (en) | 2021-12-10 | 2024-03-26 | Saudi Arabian Oil Company | Oil-water separation system using hydrophobic/hydrophilic materials for capacity increase and improving produced water quality |
Also Published As
Publication number | Publication date |
---|---|
AU2010268768A1 (en) | 2012-01-12 |
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