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WO1993004753A1 - Appareil permettant de mettre un solide en contact avec un liquide, notamment afin d'extraire un solide a l'aide d'un liquide - Google Patents

Appareil permettant de mettre un solide en contact avec un liquide, notamment afin d'extraire un solide a l'aide d'un liquide Download PDF

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Publication number
WO1993004753A1
WO1993004753A1 PCT/HU1992/000032 HU9200032W WO9304753A1 WO 1993004753 A1 WO1993004753 A1 WO 1993004753A1 HU 9200032 W HU9200032 W HU 9200032W WO 9304753 A1 WO9304753 A1 WO 9304753A1
Authority
WO
WIPO (PCT)
Prior art keywords
casing
liquid
equipment
solid
trays
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
Application number
PCT/HU1992/000032
Other languages
English (en)
Inventor
István Takács
Gyula Kovács
Péter RUDOLF
Árpád KOLLÁR
Csaba LO^'RINCZ
Eszter DEZSÉRI
Béla SZARVADY
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.)
Richter Gedeon Vegyeszeti Gyar Nyrt
Original Assignee
Richter Gedeon Vegyeszeti Gyar RT
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 Richter Gedeon Vegyeszeti Gyar RT filed Critical Richter Gedeon Vegyeszeti Gyar RT
Publication of WO1993004753A1 publication Critical patent/WO1993004753A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B01D11/023—Moving bed of solid material using moving bands, trays fixed on moving transport chains
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
    • B01D33/015—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with flat filtering elements
    • B01D33/0183—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with flat filtering elements supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/68—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers

Definitions

  • This invention relates to an equipment for contacting a coarse solid material, e.g. grist, granulate and the like with a liquid, particularly for extracting a solid with a liquid.
  • a coarse solid material e.g. grist, granulate and the like
  • a bulk flow (conveyor) system equip ⁇ ment is described e.g. in the Unites States patent specification No. 3.279,890.
  • This apparatus has a casing with an U-shaped tube; the upper ends of the vertical shanks of this tube are led to a chamber.
  • One shank of the U-shaped tube down to about its lower third, the other shank up to its upper third are formed (built) with a double wall and a heat-transfer medium can be flown in the space between the two walls.
  • the perforated disks mounted equidistantly one from another on the endless chain pass unidirectionally (e.g. in a counter-clockwise direction) at an uniform rate in the casing.
  • the driving- -turning (conveying) mechanism bearing the wheels is placed in the upper chamber men ⁇ tioned above.
  • a screw feeder is led into the U-shaped casing at the upper end of one of the shanks (where this shank is not duplicate and about the lower third of this shank has a double wall).
  • the screw continuously feeds the solid granular material, e.g. plant grist to be extracted into the cells between the neigh ⁇ bouring disks (trays).
  • the extraction liquid is fed into the upper part of the other shank of the casing and, while passing coun- tercurrently to the solid, it extracts the active agent content thereof.
  • a filter chamber built in beneath the site of feeding in the solid is provided, which is bounded by a filter mantle containing small-sized holes (of 1 mm or smaller).
  • the disks transporting (conveying) the solid are fastened to the drag chain in their central region, i.e. centrally and fitted with roll pairs joining the outer wall poss ⁇ essing a greater radius) of the casing (tube).
  • the perforations of the disks are relatively great, 10 to 30 times larger than that of the particle size of the plant grist.
  • both the rolls and disks are fitted with a cleaning device.
  • a vibrator moving the extraction liquid is built into the lower section of the U-shaped casing (which connects the vertical shanks) in order to fill with the solid most completely (up to about 805 ⁇ ) the working volume of the cells bounded by the disks (trays), i.e. to increase the performance (output) of the extraction equip ⁇ ment.
  • the vibrator works at a frequency of 50-200/s; an amplitude of 0.05-0.15 mm corresponds to this frequency range in the casing.
  • the diameter of these disks should be smaller than that of the inner diameter of the tube therefore, a radial slit should be present between the edge of the disk and the wall of the casing; this slit is 15 mm in size when the inner diameter of casing is e.g. 300 mm. Since the disks are centrally fastened to the drag chain, they move radially inwards from the wall of casing in the lower, curved sections of the casing in spite of the roller support, whereby the value of slit size is lowest along the inner curve (of smaller radius) and highest along the outer curve (of longer radius).
  • the axial mixing-back may be significant and therefore, as well as because of agglutination of the particles, a plug could eventually and unexpectedly develop in some cells.
  • the extractor described in the United States patent spec ⁇ ification No. 3,279,890 is unsuitable to extract such materials, i.e. the field (area) of its utilization is rather restricted. Its further disadvantage appears therein that as a consequence of the central fixation to the drag chain of the conveying trays as well as the forked wheels of the conveying mechanism, the cleaning of the trays (per ⁇ forated disks) is difficult, the structure of the cleaning devices (purifiers) is com ⁇ plicated and their failure (breakdown) may cause severe operation (working) disturbances.
  • the OLIER type countercurrent, con ⁇ tinuously operating solid/liquid extractor also belongs to the bulk flow system equip ⁇ ments.
  • This extractor contains a casing with several successive U-shaped sections passing into one another.
  • the solid is conveyed by conveying disks (trays) fastened tc chains and fitted with a filter surface.
  • the height of the U-shaped casing sections increases in the direction of pas ⁇ sage of the solid.
  • no vibrator is used .for this solving; it is tried to ensure the extraction performance desired by in ⁇ creasing the path length, i.e. the residence time.
  • This extractor also has the drawback that the range of its utilization is very restricted (it can be used only for the extraction of poppy-head grist and other grists of this sort, so-called grits) and, on the other hand, its cleaning is even more complicated than that described in the solving published in the United States patent .
  • spe ⁇ cification No. 3,279,890 since a lower drive (by forked wheels) is also used in the OLIER extractors.
  • the present invention is aimed to de ⁇ velop a continuously operating, bulk flow type countercurrent solid/liquid extractor where, while maintaining the advantages arising from the simple movement of the phases (con ⁇ veyance of the solid in cells bounded by trays, flowing of the liquid by the gravity), the range of utilization of the equipment can be extended for the solving of practically all tasks involving the extraction of a solid with a liquid, i.e. the equipment should be useful for the extraction of e.g. any type of solid, dry grists, granulated, granular, powder-containing aggregations with hete ⁇ rogeneous partizle size as well as wet, fat- -containing and similar materials of any kind with a good efficiency and safe operation.
  • the invention is based on the recog ⁇ nition that the extension of the utilization range of an extractor and its safe operation can be achieved by eliminating the formation of a plug, substantially by avoiding the axial mixing-back, furthermore by bringing into vigorous movement the solid, e.g. grist or granulate being present in the cells between the conveying trays. Furthermore, it has been recognized that the mixing-back can be eliminated by elastically deformable, mobile sealing as well as by the excentric fastening (along the inner edge) of the drag chain to the trays whereas the strengthening of the movement of liquid within the cells can be achieved by pulsation of the liquid. It is known that, during extraction of a solid with a liquid, the active agent or an other component of the solid phase is transferred to the extraction liquid.
  • the rate of extraction of the solid is sub ⁇ stantially defined by the concentration dif ⁇ ference between the concentration in the extraction liquid and that in the solid.
  • This process is influenced inter alia by the me ⁇ chanical and chemical decomposition of the solid, the geometrical dimensions of its particles, the temperature of extraction and the like. It has been recognized that, in addition to these, the extraction process can preferably and decisively influenced also by flowing the extraction liquid in a defined rate range (interval) around the solid particles of the material.
  • the advan ⁇ tageous effect of this measure appears therein that an amount of the active agent flows out from the solid in a greater amount than commonly during the time unit and this proceeds more rapidly.
  • the material transfer coefficient (being characteristic of flowing out of the active agent) can be elevated by about 400? ⁇ , i.e. the extraction process can favourably and definitely be influenced by maintaining the flow rate of the extraction liquid around the solid particles at a value of 500-700 cm/min preferably about 600 cm/min.
  • the task of the invention can be solved by a bulk flow (conveyor) extraction equipment having a tube-shaped casing, where an endless drag chain connected to a drying mechanism is present (situated), to which trays fitted with a filter sheet are interspacedly fastened; a loading (feeding) device (feeder) used to feed in the granular solid to be extracted leads to the casing; a feeding orifice is provided in the wall of casing for introducing the extraction liquid into the casing; and the equipment possesses a filter unit in ⁇ corporated to the casing, used for separating the liquid containing the material extracted as well as a discharging outlet for removing the extracted solid, the principle of this equipment comprising: joining the chain links of the drag chain one to another by inserting rolls; fastening the trays rigidly to the central part of each chain link in the region of one of their circumferential sites and to the longitudinal geometrical centre line of the chain link; fastening a sealing element, which is widening outwards to the hin
  • the rigid and perpendicular mounting of the tray to the drag chain link results therein that the tray takes place radially, perpendicularly to the casing wall in all sections (both in the vertical and curved parts) of the casing.
  • the pulsator is suitably a slow plunger pump with a great stroke- -length. It is of purpose to use a pulsator with a piston establishing in the liquid preferably a frequency of 1.0-5.0 1/s suitably about 1.5 1/s and an amplitude (stroke) of 30-100 mm, preferably about 45 mm.
  • an average liquid rate of 500-700, preferably about 600 cm/min being most advantageous for the extraction, can be accomplished around the solid particles without any problem.
  • the equipment according to the invention contains a sealing element bearing slits of generatrix direction.
  • the structure material of the sealing element may be spring steel.
  • the slits of the sealing element suitably have a radially widening form and start from the holes being at their inner root.
  • the width of the slit may be about 0.1 mm in average.
  • a further embodiment of the equipment is characterized thereby that the chain links have two parallel interspaced chain link elements prepared grom plate (sheet) material, the ends of which contain penetrating holes, the neighbouring chain links are connected one with the other by axes led through these holes and the rolls are revolvably mounted to the exes between the chain link elements.
  • the trays possess a circular (ring-like), cylindrical side wall as well as suitably several reinforcing ribs (fastened in the inner part of the ring) as well as a filter sheet, preferably a screen covering one of its orifices, and the sealing element contains in addition to its" conic part also a cylindrical part joining the outher surface of the side wall and fastened to the side wall.
  • the equipment is fitted with cleaning devices (purifiers) provided for cleaning the rolls and filter sheets of the trays.
  • cleaning devices purifiers
  • These devices are in a chamber, where the casing ends from beneath and the forked wheels modifying the movement direction of the drag chain are also situated.
  • a brush-type, revolving purifier for cleaning the rolls as well as to provide the purifier with swinging, scraping plates operated by an articulate-rodding driving mechanism controlled by a serrate control disk fastened to the axis of the forked wheel deflecting the drag chain.
  • Figure 1 shows the front view of the equip ⁇ ment together with a breakout of a part of the casing and chamber wall'
  • Figure 2 shows a section of higher scale taken along the line ⁇ -A signed in Figure i;
  • Figure 3 shows the part B ⁇ signed in Figure 1 in a section of higher scale
  • Figure 4 represents a section of a tray of the conveying mechanism taken along the line C_-C_ signed in Figure 5 by using a higher scale;
  • Figure 5 is a section taken along the line E_-E signed in Figure 4 with the breakout of the filter sheet at the site given;
  • Figure 6 shows part F_ signed in Figure 4 by using a higher scale
  • Figure 7 is a view from direction of arrow signed in Figure 6*,
  • Figure 8 illustrates the part j ⁇ signed in Figure 1 in a vertical section of higher scale
  • Figure 9 is a view from direction of the arrow I_ signed in Figure 8.
  • the extraction equipment shown in Figure 1 has a casing signed as a whole by the re ⁇ ference number 1, with a geometric central axis _.
  • the casing is prepared from an U- -shaped tube having a circular cross-section.
  • the casing parts la and lb corresponding to the vertical shanks of U are connected beneath by the curved casing part lc.
  • This latter one contains the curved sections 14 connected by the lowest, straight tube piece 15.
  • the casing parts la, lb and lc of the casing 1 (except the tube piece 15 and filter unit 10) are duplicate in their region beneath the horizontal plane s_ signed by point-line, i.e.
  • the neighbouring trays 3 bound cells 19 one with another and with the casing wall 1, which continuously move in the direction of arrow _f signed in the upper part of Fig ⁇ ure 1 since the drag chain 2 conveyes the trays 3 at an uniform rate.
  • the driving mechanism e.g. known per se
  • Two forked wheels 16a and 16b are built in to the chamber 7 (where the driving mechanism mentioned may also be placed), which the drag chain 2 is led through and which play also the role of a deflecting plate as the motion path of drag chain 2 is modified by them.
  • the driving mechanism is in a functional connection with one of the forked wheels, e.g. 16a.
  • the direction of rotation of the forked wheels 16a and 16b is indicated by the sign v.
  • a feeding device (feeder) is led, which is used for feeding in the granular (e.g. crushed, ground) solid previously treated mechanically and/or chemically to the casing 1, more particularly to the cells 19.
  • the feeder 4 is suitably represented by a feeding screw; the granular solid is signed by the reference number 20 in Figure 1.
  • the feeder 4 is connected to the feeding orifice 4a. The solid is fed in to casing 1 as shown by arrow .
  • the conduit 5 and feeding orifice 5a are aimed to introduce the extraction liquid to the casing 1, i.e. cells 19.
  • the orifice 5a ends at the upper (not duplicate) section of the casing part la, oppositely to the feeding orifice 4a used for introducing the solid; the feeding in of the extraction liquid is shown by the arrow ja signed on the conduit 5.
  • the motion of liquid is shown by the arrow jc, that of the solid by the arrow _d.
  • a pulsator 6 is built in to the casing part lc of casing 1, to the straight tube piece 15 connecting the curved sections 14.
  • the motion of liquid around the solid particles being present in cells 19 may be strengthened and the rate of liquid can be increased to its best (optimum) value, i.e. 600 cm/min.
  • the extraction of the active agent from the solid 20 occurs by the aid of the extraction liquid introduced through the feeding orifice 5a to casing 1, in the section between the feeding orifice 5a and the removal of the extract, i.e. the outlet orifice 13a.
  • the outlet orifice 13a mentioned above leads out from the lower part of the collecting chamber 11 of the filter unit signed as a whole by the reference number 10; the conduit 13 is aimed to remove the extract (see the arrow Ih signed on the conduit).
  • a tube forming a not duplicate section of the casing part lb is shaped in the form of a filter mantle representing a part of the filter unit 10.
  • the throat 17 leads out; the solid extracted, containing no active agent leaves through the discharge orifice 17a of the throat 17 in the way signed by the arrows e_.
  • a cleaning device (purifier) 8 for cleaning the rolls of drag chain 2
  • a cleaning device 9 for cleaning the trays 3.
  • the filter mantle 12 of the filter unit 10 is formed from a slotted wall constructed of filter elements 12a formed from vertical rods with a lengthy, trapezoidal cross-section, between which outwards .widening slits 12b are present.
  • the orifices 12c on the inner side have a significantly smaller width _i than those of orifices on the outer side (the difference may be 3- to 6-fold), whereas the width j_ of the filter elements 12a may be even the 10-fold of the size i_.
  • FIG 3 shows a detail of a preferred embodiment of the pulsator 6 according to Figure 1 in a section of a higher scale.
  • a plunger pulsator is used, of which the piston- -housing 21 leads from above to the straight tube piece 15 forming a part of the casing 1 with the geometrical central axis _y_ of the extractor.
  • the piston-housing is in separate connection with the cells 19 passing through in the direction of arrow Jf.
  • a pulsator 6 is used, which is capable to establish a pulsation system showing the following char- acteristics: frequency: 1-5 1/s, suitably about 1.5 1/s', amplitude: 30-100 mm, suitably about 45 mm ("Amplitude" means the average displacement of liquid within casing 1 of the extractor.)
  • An advantageous embodiment of trays 3 of the extraction equipment according to Figure 1 is illustrated in detail in Fig ⁇ ures 4-7.
  • the tray 3 is circular from a view from above ( Figure 5 ) and its cylindrical annular side wall 29 is reinforced by the ribs 25, 26 and 27, 28 prepared from sheet material.
  • the space bounded by the cylindric side walls on one side being in the direction of passing of the drag chain 2 (arrow jf_, Figure 1) (above on Figures 4-6 ) is covered by a filter sheet 30, e.g. screen getting to a direct contact with the transported solid.
  • the filter sheet 30 may be prepared e.g. from metal or an other material, mainly e.g. plastic, its whole size is conveniently between 0.5 and 1.5 mm.
  • the sealing element has a cylindric part 32 and a conic part (truncated cone) 33; the former one joins from outside the outer mantle surface of the cylindrical side wall 29.
  • This cylindric part 32 is from outside overlapped by the edge of the filter sheet 30 wrapped onto the side wall 29 and in the area of overlapping fastening elements, e.g. screws are led through the filter sheet 30 and cylindric part 32 as well as side wall 29; thus, both former structural parts are fastened to the latter one.
  • the outer dia ⁇ meter D, of the cylindric part 32 of the sealing elence 31 ( Figure 4) is smaller than the inner diameter J of casing 1 in Figure 1.
  • the difference is such that the slit between the casing wall and the outer edge of tray 3 is radially 0.05xJ mm.
  • the angle of mantle of the conic part 33 is selected in such a way ( Figure 6) that, in an undeformed (free) state, the longest diameter D_ of the conic part 33 drawn in Figure 6 be greater than the inner diameter J of casing 1 ( Figure 1); D tripod is suitably 1.15x mm.
  • the sealing element 31 (eventually only its conic part 33) may be prepared e.g. from plastic and in this case it can be pro ⁇ pokerd in one piece, in a compressed form in such a way that the mantle of truncated conic form (i.e. the conic part 33) be e- lastically deformed during its passage through the tube (i.e. in the casing 1, Figure 1).
  • the occurrence of the elastic deformation can be promoted by forming the conic part 33 with the slits 37 of generatrix direction, which is more necessitated in the case of a sealing element 31 ("collar") prepared from a metallic substance, e.g. stainless spring steel.
  • a sealing element 31 prepared from stainless spring steel can be seen in Figures 6 and 7; the slits 37 divide the sheet of truncated conic form ("collar") to blades (tongues) 35. At the inner end of slits 37, in the region where the conic part 33 passes into the cylindric part 32, wholes 36 are present, the role of which is to eliminate the tensions eventually de ⁇ veloping in the root in the course of a longitudinal cutting.
  • the blades (tongues) 35 be situated in the direction of rolling, i.e. along the grain (in the preferred orientation) (arrow 1_, Figure 7).
  • the blades can be prepared either from metallic or nonmetallic structural ma ⁇ terials', a substantial demand against the substance lies therein that it should be capable of elactic deformation and to return to its original form after ceasing of the load directed inwards.
  • Each tray 3 is fitted with one chain link signed as a whole by the reference number 38 ( Figure 4), by rigid fastening (fixation), and each chain link 38 possesses two chain link elements 38a, 38b each, which are fastened to the reinforcing ribs 25, 27 on the outer end thereof by an interspace n one from another ( Figure 5).
  • the chain links 38 of j; height are in a perpendicular position to the plane of the filter sheet 30 of tray 3 and extend in opposite directions (upwards and downwards, according to Figure 4) with the same interspace _t, from the upper plane of the filter sheet 30 as well as from the lower edge of the sealing element 31.
  • FIG. 1 An essential characteristic of the conveying mechanism according to the invention consists therein that, as it is shown in Figure 1, the drag chain 2 is situated in casing 1 containing the curved section 14 in such a manner that the rolls 40 abut the inner surface of casing 1 along the inner side thereof, where the radius f ⁇ , of the curved sections 14 is smaller (the greater radius of the outer curve is signed by R_schreib in Figure 1). Due to this arrangement and to the perpendicular position of chain links 38 in relation to the plane of the respective trays 3 (filter sheet 30), the trays 3 will take place perpendicularly to the geometrical central axis (Figure 1) at any site (i.e.
  • the cleaning device 8, used for cleaning the rolls 40 of drag chain 2 is placed beneath the forked wheel 16a driving the drag chain
  • the mechanical cleaning device 9 contains an articulate rodding driving me ⁇ chanism signed as a whole by the reference number 54 as well as scraping plates 53 being in a free swinging movement along the surfaces of trays 3, which are operated by the driving mechanism mentioned, which latter is in func ⁇ tional connection with the toothed control disks 55 wedged to the axis 52 of the forked wheel 16a.
  • the articulate rodded driving mechanism 54 possesses horizontal rods 56 and vertical rods 47; the scraping plates 53 are turnably mounted to the upper end of rods 47.
  • the operation of the cleaning device 9 is synchronized with the rotation of the forked wheel 16a by intermediation of the control disks 55: namely, as the control disks 55 rotate in the direction of the arrow v* together with the axis 52, they lift and draw inwards the horizontal rods 56, whereby the vertical rods 47 are also lifted up whereas the scraping plates 53 turn away.
  • the tooth of the control disk 55, lifting the rods 56 turns beyond at their end, the springs 48 again compel these rods outwards to the starting position similarly as the springs 49 press back the vertical rods 47 downwards to their starting position and therefore, the scraping plates 53 clean the filter sheet 30 of the disks 3 contacting with them.
  • the cleaning of the filter can be solved by blowing in air or an inert gas instead of mechanical cleaning of the filter sheet and/or a washing with a washing fluid is also possible. It is suitable to use the cleaning device 9 shown in Figure 8 and 9 (or a mechanical cleaning with an other system) when the extrac ⁇ tion liquid is a solvent or a liquid mixture containing valuable ingredients (components); namely, in the case of an organic solvent, the gas used for blowing off can only be an inert gas whereas in the case of washing with a liquid, the liquid introduced makes the subsequent treatment of the extracted material (liberation from solvents, drying) difficult.
  • the cross- -section of the tube-shaped casing 1 can be not only a circle but practically any other form, however, the forms of tray 3 and sealing element 31 must follow the form of the cross-section given.
  • the cleaning device 9 (and also cleaning device 8) according to Figures 8 and 9 can be used at all cross-section forms of the casing 1.
  • the endless drag chain is started, which passes together with the trays 3 mounted thereto at an uniform rate in the casing 1, in the direction of arrow _f, which, accor ⁇ ding to the sense, corresponds to the arrows ⁇ j due to the reversing effect of the forked wheel 16b and agrees with the passage direction of the solid.
  • the mechanically/chemically pretreated solid 20 to be extracted is con ⁇ tinuously fed into the moving cells 19 (arrow ⁇ ) by the means of the screw feeder 4,* the extraction liquid is also continuously intro ⁇ quizd through the conduit 5 (arrow b_) .
  • the countercurrent (arrow c) liquid extracts the active agent from the solid 20 then, due to the hydrostatic head difference H, (liquid column), the liquid containing the active agent, i.e. the extract comes out from the casing 1 in the filter unit 10 and leaves through the filter mantle 12 and conduit 13 (arrow ) .
  • the instantaneous value of the driving force FL, (hydrostatic head difference) may vary between Jj, and (H.-0.5 _H_struct) depending on the selected volume flow of the extraction liquid and position of the granular solid.
  • the geometrical dimension JH- is the height difference between the stump 5a used for introducing the extraction liquid and the bottom of orifices 12c on the inner side of the filter mantle 12.
  • the geometrical dimension ] chorus is the geometric height of the orifices 12c on the inner side of the filter mantle 12.
  • the value of _H_ admir is equal to (1.2-3)g, where g means the interspace of trays 3 ( Figure 1).
  • the ex ⁇ traction process is extremely preferably strengthened (intensified) by pulsing the liquid with the pulsator 6 in the frequency and amplitude ranges defined above, whereby a rate of about 600 cm/min can be achieved around the particles of the solid 20 being present in the cells 19.
  • the ranges of mixing- -back and fall-back of the solid being present between the neighbouring cells 19 has com- pletely been eliminated by the sealing solu ⁇ tion according to Figures 4-7, i.e.
  • the method of cleaning trays 3 and rolls 40 by using the cleaning devices 8 and 9 has previously been described in detail.
  • the solid 20 exempted from its active agent content (or most part thereof) is discharged into the throat 17 in the upper chamber 7, at the turning site of trays 3 at the forked wheel 16a and leaves the equipment through the discharage orifice 17a according to the arrow e.
  • the advantageous effects connected with the invention are summarized hereinafter.
  • the most important advantage of the equipment according to the invention lies therein that the mixing-back and washing- -back of the solid from a cell to the next one are impeded with a complete safety. In this way the formation of "plugs" and therefore, the danger of interruption of the extraction process are eliminated. Due to the pulsation, the parameters of extraction (low proportion of liquid, higher efficiency of extraction beside a shorter duration of extraction) become more favourable.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Appareil possédant une enveloppe tubulaire (1) dans laquelle est située une chaîne d'entraînement sans fin (2) reliée à un mécanisme d'entraînement et fixée à des bacs (3) séparés les uns des autres par une certaine distance (g) et dotés chacun d'une feuille de filtrage (30). Un dispositif (4) d'alimentation en solide granulé à extraire (20) débouche dans l'enveloppe (1), un orifice d'alimentation (5a) est prévu pour introduire dans l'enveloppe (1) le liquide d'extraction, et l'appareil possède une unité de filtrage (10) installée dans l'enveloppe (1) et destinée à sélectionner le liquide renfermant le matériau extrait, ainsi qu'un orifice de décharge (17a) assurant l'évacuation du solide extrait. Les chaînons (38) de la chaîne d'entraînement (2) sont articulés les uns aux autres par l'intermédiaire de cylindres (40). Les bacs (3) sont montés solidaires des chaînons au niveau d'une partie intermédiaire de ceux-ci et à proximité de leur périphérie selon la ligne médiane géométrique longitudinale de chaque chaînon. Un élément d'étanchéité (31) évasé vers l'extérieur et élastiquement déformable épouse de près la face interne de la paroi de l'enveloppe (1) pendant le passage des bacs (3), et est fixé à la partie postérieure de ceux-ci telle que déterminée par leur sens de marche (f). Un pulsateur (6) est relié à l'enveloppe (1), de préférence à proximité du bord inférieur de celle-ci, afin d'intensifier le mouvement du liquide.
PCT/HU1992/000032 1991-09-02 1992-08-29 Appareil permettant de mettre un solide en contact avec un liquide, notamment afin d'extraire un solide a l'aide d'un liquide Ceased WO1993004753A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU912839A HU212779B (en) 1991-09-02 1991-09-02 Equipment for contact of solid and fluid material mainly for extraction of solid material with liquid
HU2839/91 1991-09-02

Publications (1)

Publication Number Publication Date
WO1993004753A1 true WO1993004753A1 (fr) 1993-03-18

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PCT/HU1992/000032 Ceased WO1993004753A1 (fr) 1991-09-02 1992-08-29 Appareil permettant de mettre un solide en contact avec un liquide, notamment afin d'extraire un solide a l'aide d'un liquide

Country Status (5)

Country Link
CN (1) CN1070350A (fr)
AU (1) AU2512992A (fr)
HU (1) HU212779B (fr)
WO (1) WO1993004753A1 (fr)
ZA (1) ZA926579B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102288448A (zh) * 2011-07-22 2011-12-21 上海化工研究院 一种反转式超声振荡微量提取装置
CN110946284A (zh) * 2019-10-28 2020-04-03 海宁纪亨保健食品有限公司 一种生姜处理设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2008709A1 (fr) * 2007-06-27 2008-12-31 Urea Casale S.A. Procédé de granulation et appareil
CN102350088A (zh) * 2011-07-15 2012-02-15 江苏华正环保科技有限公司 对植物有效物质连续萃取的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US550033A (en) * 1895-11-19 Apparatus for making extracts
DE961618C (de) * 1954-04-23 1957-04-11 Schweizerische Lokomotiv Kontinuierlich im Gegenstrom arbeitender Extrakteur mit einer endlosen, mit siebartigen Schaufeln besetzten Foerderkette
DE963864C (de) * 1954-04-23 1957-05-16 Schweizerische Lokomotiv Kontinuierlich im Gegenstrom arbeitender Extrakteur mit einer endlosen, mit dachartigen Siebschaufeln besetzten Foerderkette
US3279890A (en) * 1963-05-14 1966-10-18 Gedeon Richter A G Apparatus for the solvent extraction of solids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US550033A (en) * 1895-11-19 Apparatus for making extracts
DE961618C (de) * 1954-04-23 1957-04-11 Schweizerische Lokomotiv Kontinuierlich im Gegenstrom arbeitender Extrakteur mit einer endlosen, mit siebartigen Schaufeln besetzten Foerderkette
DE963864C (de) * 1954-04-23 1957-05-16 Schweizerische Lokomotiv Kontinuierlich im Gegenstrom arbeitender Extrakteur mit einer endlosen, mit dachartigen Siebschaufeln besetzten Foerderkette
US3279890A (en) * 1963-05-14 1966-10-18 Gedeon Richter A G Apparatus for the solvent extraction of solids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102288448A (zh) * 2011-07-22 2011-12-21 上海化工研究院 一种反转式超声振荡微量提取装置
CN110946284A (zh) * 2019-10-28 2020-04-03 海宁纪亨保健食品有限公司 一种生姜处理设备

Also Published As

Publication number Publication date
HU212779B (en) 1996-11-28
ZA926579B (en) 1993-03-17
HU912839D0 (en) 1992-01-28
AU2512992A (en) 1993-04-05
CN1070350A (zh) 1993-03-31
HUT68552A (en) 1995-06-28

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