WO2006037877A1 - Colonne pulsee pour systeme solide/liquide - Google Patents
Colonne pulsee pour systeme solide/liquide Download PDFInfo
- Publication number
- WO2006037877A1 WO2006037877A1 PCT/FR2005/002414 FR2005002414W WO2006037877A1 WO 2006037877 A1 WO2006037877 A1 WO 2006037877A1 FR 2005002414 W FR2005002414 W FR 2005002414W WO 2006037877 A1 WO2006037877 A1 WO 2006037877A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- column
- column according
- solid
- walls
- solid 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0215—Solid material in other stationary receptacles
- B01D11/0223—Moving bed of solid material
- B01D11/0242—Moving bed of solid material in towers, e.g. comprising contacting elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0261—Solvent extraction of solids comprising vibrating mechanisms, e.g. mechanical, acoustical
Definitions
- the invention relates to a pulsed column for performing a treatment of a system comprising a liquid phase and a solid phase.
- It relates more particularly to a pulsed column for controlling and adjusting the residence time of the solid phase in the column independently of the residence time and the flow rate of the liquid phase.
- the pulsed columns are often used to achieve an intimate exchange between a solid phase and a liquid phase. This exchange occurs during the movement of the phases in the column.
- the pulsations applied to the medium contained in the column make it possible to improve this exchange by maintaining the dispersed phases and increasing the residence time of the solid phase in the column.
- EP 46 2897 discloses a packed packed column comprising a stack of baskets and horizontal plateaux in the form of rings.
- the medium containing the liquid and the solid in a basket is kept in agitation by applying a first pulse of low energy and high frequency.
- a second pulse of higher energy and low frequency is applied to cause the output of the middle of the basket by an overflow effect.
- the solid phase introduced into the upper basket will go from basket to basket to be extracted at the bottom of the column. This system makes it possible to increase the residence time of the solid in the column.
- pulsed columns have been proposed in patents FR 2743508 and EP 973591. These columns comprise walls segmenting the column into several adjacent zones. Each wall comprises a sealed portion prohibiting any exchange between two adjacent zones in a predefined direction, a part allowing an exchange or a circulation of the liquid phase from one zone to the adjacent zone and finally a third part provided with a valve allowing the circulation from the solid phase of an area to an adjacent area.
- a pulse of low amplitude and high frequency is applied in the column to promote the exchange between the different phases and generate a pressure difference between two adjacent zones causing the opening of the valves to allow the passage of the solid from one zone to the other. 'other.
- One of the aims of the present invention is in particular to propose a device constituted by a pulsed column for maintaining a solid phase in dispersion in a liquid phase for a certain time making it possible to control and determine the residence time of the two phases entering the column of independently, as well as the residence time of the solid product between each zone or plateau of the column.
- the invention relates to a pulsed column intended to maintain a solid phase dispersed in a liquid phase for a certain time to allow, for example, an exchange between the liquid phase and the solid phase comprising at least one wall delimiting at at least two zones, stages or adjacent volumes in said column, each wall comprises a first filtering part allowing the liquid phase to flow from one zone to the adjacent zone and preventing the solid phase from circulating from one zone to another, a second portion formed by an orifice for the circulation of at least the solid phase from one zone to another adjacent zone.
- the column comprises means for closing and opening said orifice, means for applying in the column pulsations of low amplitude and high frequency and means for applying in the column or in each volume or zone pulses of large amplitude and low frequency.
- the pulses of high amplitude are applied with simultaneous opening of the closure means aperture openings of each wall or some of these means.
- the device of the invention has two independent means for applying pulses and pulses of different amplitude and frequency and it is possible to control the passage of the solid phase of a zone or volume of the column to the other , while maintaining a circulation of the liquid phase through the filtering part of the walls of each tray, the column
- the pulsation of the invention allows to have residence times of the solid phase and the liquid phase which are determined and controlled independently of one another.
- the operation of the pulsed column of the invention can be adapted to the characteristics of the products and the chemical or physico-chemical phenomenon used.
- the device of the invention makes it possible to maintain a solid phase in dispersion in a liquid medium for a determined time to obtain in particular a good exchange between the two phases or an intimate contact between these phases.
- This device also makes it possible to maintain the solid phase in dispersion in a liquid medium to allow the solid phase to evolve during the passage in the column by modifying its structure, agglomeration or any other physicochemical phenomenon. These operations are performed in a continuous mode.
- the device of the invention makes it possible, for example, to carry out solid washing, chemical reactions between a solid phase and a liquid, and a reaction between compounds present in the liquid phase catalyzed by a solid heterogeneous catalyst constituted by by the solid phase or present in the solid phase, or any other process requiring intimate contact between a solid phase and a liquid phase or for a certain time to maintain a solid phase dispersed in a liquid phase to treat or modify the structure or texture of the solid.
- the closing means of the orifices provided on each wall or plate are actuated automatically by the pressure difference created between two adjacent zones by the pulses of high amplitude and low frequency. Under the effect of these pulses, the closing means are actuated so as to release the passage of the liquid and solid phases through the orifice.
- the actuation of the opening or closure of the means for closing the orifices of each plate is carried out by any means of control, electrical, mechanical, pneumatic, electromagnetic or the like, of independently of the means generating the pulses of high amplitude and high frequency.
- control of the shutter means associated with a wall or a plate may be independent of the control of the shutter means associated with another plate.
- Such embodiments of the invention make it possible to use the pulsed column of the invention with liquid and solid streams in cocurrent or countercurrent.
- the liquid and solid streams can be upward or downward.
- this control means closing and opening allows to control and determine the residence time of the solid phase in the column. It also makes it possible to obtain residence times which are uniform or very similar and substantially homogeneous for all the particles of different sizes and weights constituting the solid phase. This result makes it possible to obtain a homogeneous treatment of the solid phase.
- the direction of the solid flow in the column is advantageously opposite to the natural or gravitational flow of said solid in the associated liquid phase.
- the closure means may consist of valves advantageously equipped with a spring to maintain them in the closed position of the orifice. These valves are actuated by the pressure difference between two adjacent stages or volumes zones under the effect of a high amplitude pulse applied to the medium contained in the column.
- the valves may be replaced by balls or spheres resting on the edges of the associated orifice and arranged in a cage means to limit the movement of the ball or the sphere.
- the opening of the orifice is obtained by displacement of the ball or the sphere under the effect of the pressure difference generated by the impulsons.
- the weight of the ball or the sphere must be sufficient so that the low amplitude pulsations do not cause displacement.
- the sealing means are advantageously constituted by valves controlled by any conventional means of opening and closing control.
- the means for closing and opening the orifices must allow them to open only during the duration of application of the large amplitude pulse.
- the pulsed column of the invention by controlling the transfer of the solid phase from one zone to another independently of that of the circulation of the liquid phase makes it possible to determine and adjust the residence time of the solid in the column and in each zone or volume thereof, whatever the residence time of the liquid phase and whatever the density and size of the solid particles. As indicated above, this adjustment can be performed regardless of the direction of flow of liquid and solid flows.
- FIG. 1 is a diagrammatic sectional view of a pulsed column according to a first embodiment of the invention, schematizing the operation thereof;
- FIGS. 2a, 2b, 2c are partial sections of the pulsed column of FIG. the invention according to a second embodiment of the invention showing different phases of operation of the pulsed column of the invention.
- an embodiment of the pulsed column 1 of the invention comprises the body 2 of the column formed by a tube, advantageously cylindrical, inside which the exchange between the liquid phases takes place. and solid.
- Column 1 comprises at its lower part, a tube 3 or reservoir of diameter greater than that of the body 2 of the column in the illustrated embodiment.
- This reservoir 3 is separated from the body of the column by a first wall 4 constituted by a filter material.
- This wall or plate 4 prevents the solid phase from entering the reservoir 3.
- the reservoir 3 is connected to means 5 for generating pulses of low amplitude and high frequency in the liquid phase contained in the reservoir 3 and in the entire liquid phase contained in the body 2 of the column 1.
- the means 5 are for example, constituted by a piston 6 connected to a pneumatic or electric motor (not shown) and animated with a back and forth movement of high frequency and low amplitude.
- This embodiment of the means 5 for generating low amplitude pulsations is given for information only, without limiting the scope of the invention.
- other pulsation generating means can be used as a membrane system or the like.
- the reservoir 3 is also connected by the tube 7 to means 8 of pulse generation of high amplitude and low frequency.
- These means 8 may also be constituted by a piston connected to a motor (not shown).
- the above description of the high amplitude pulse generating means is given by way of illustration without limitation of the scope of the invention.
- the reservoir 3 comprises an outlet 9 of the liquid phase.
- the column of invention is divided, in its part corresponding to the body 2, into several zones or volumes V1 to Vx. by walls or trays 10.
- the plate 10 is constituted by a filtering wall allowing the passage of a liquid from the volume V x- - I to the volume V x .
- the plate 10 comprises, in the illustrated embodiment, a central orifice 11.
- a ball or sphere 12 is disposed on said orifice, the walls of the orifice 11 serving as a seat for the ball or sphere.
- Stem-shaped elements 13 define a cage in which the ball or sphere 12 can move.
- the pulsed column 1 of the invention comprises at its upper part a supply 14 in the liquid phase and an outlet 15 of the solid phase.
- the latter is located in the volume or floor V located above the last wall 10.
- the trays 10 are fixed in the column according to the usual means and well known to those skilled in the art.
- a liquid flow is fed through the conduit 14 and withdrawn through the conduit 9. the liquid passes through the walls 10 through the filtering surfaces.
- the solid phase to be treated is fed through the duct 16 into the volume ⁇ ⁇ located above the filtering wall 4.
- pulses of low amplitude and high frequency are applied by the means 5 to the liquid phase contained in the column.
- a pulse of high amplitude is applied by the means 7 to the liquid contained in the column 1.
- the pressure difference created between two adjacent volumes causes the movement of the ball 12 allowing the mixture contained in the volume or lower floor to the wall equipped with said ball to flow into the adjacent volume or stage.
- FIG. 2a illustrates a mode of operation in which the valves are in the open position when a pulse F is applied (right and left drawings) and then in the closed position to allow a mixing of the two phases in each stage of the column under the effect of low amplitude pulsations.
- FIG. 2a illustrates a mode of operation in which the valves are in the open position when a pulse F is applied (right and left drawings) and then in the closed position to allow a mixing of the two phases in each stage of the column under the effect of low amplitude pulsations.
- valves are in the open position during the application of the high amplitude pulse F, whereas some valves (one in two in the illustrated example) are kept in the open position during the mixing phase.
- This operating mode illustrates the flexibility of use of the column that allows to adjust the number of stages or their volume depending on the nature of the phases to be treated.
- This operating mode makes it possible to guarantee, in certain conditions, an identical and homogeneous residence time for all the solid products fed into the column, whatever their size and weight and the particle size distribution of the solid phase.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0410439 | 2004-10-04 | ||
| FR0410439A FR2876043B1 (fr) | 2004-10-04 | 2004-10-04 | Colonne pulsee pour systeme solide/liquide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006037877A1 true WO2006037877A1 (fr) | 2006-04-13 |
Family
ID=34949243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2005/002414 Ceased WO2006037877A1 (fr) | 2004-10-04 | 2005-09-30 | Colonne pulsee pour systeme solide/liquide |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN101048211A (fr) |
| FR (1) | FR2876043B1 (fr) |
| TW (1) | TWI285557B (fr) |
| WO (1) | WO2006037877A1 (fr) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3108859A (en) * | 1959-12-15 | 1963-10-29 | Oscar H Koski | Pulsed extraction column |
| EP0462897A1 (fr) * | 1990-06-21 | 1991-12-27 | Commissariat A L'energie Atomique | Colonne pulsÀ©e avec garnissage à paniers |
| WO2002085485A1 (fr) * | 2001-04-23 | 2002-10-31 | Aspen Aerogels, Inc. | Remplacement ameliore des fluides dans des milieux poreux par modulation de pression |
| EP0973591B1 (fr) * | 1997-04-07 | 2002-11-27 | Claude Charzat | Procede et installation d'une resolution d'un melange |
| DE10304738A1 (de) * | 2003-02-06 | 2004-08-19 | IVET Ingenieurgesellschaft für Verfahrensentwicklung und Entsorgungstechnik mbH | Vorrichtung und Verfahren zum Hervorrufen einer periodischen Flüssigkeitsbewegung in einer Extraktionskolonne |
-
2004
- 2004-10-04 FR FR0410439A patent/FR2876043B1/fr not_active Expired - Fee Related
-
2005
- 2005-09-30 WO PCT/FR2005/002414 patent/WO2006037877A1/fr not_active Ceased
- 2005-09-30 CN CNA2005800369710A patent/CN101048211A/zh active Pending
- 2005-10-03 TW TW094134553A patent/TWI285557B/zh not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3108859A (en) * | 1959-12-15 | 1963-10-29 | Oscar H Koski | Pulsed extraction column |
| EP0462897A1 (fr) * | 1990-06-21 | 1991-12-27 | Commissariat A L'energie Atomique | Colonne pulsÀ©e avec garnissage à paniers |
| EP0973591B1 (fr) * | 1997-04-07 | 2002-11-27 | Claude Charzat | Procede et installation d'une resolution d'un melange |
| WO2002085485A1 (fr) * | 2001-04-23 | 2002-10-31 | Aspen Aerogels, Inc. | Remplacement ameliore des fluides dans des milieux poreux par modulation de pression |
| DE10304738A1 (de) * | 2003-02-06 | 2004-08-19 | IVET Ingenieurgesellschaft für Verfahrensentwicklung und Entsorgungstechnik mbH | Vorrichtung und Verfahren zum Hervorrufen einer periodischen Flüssigkeitsbewegung in einer Extraktionskolonne |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2876043B1 (fr) | 2008-07-18 |
| FR2876043A1 (fr) | 2006-04-07 |
| TWI285557B (en) | 2007-08-21 |
| TW200618849A (en) | 2006-06-16 |
| CN101048211A (zh) | 2007-10-03 |
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