CA2045418A1 - Apparatus for the treatment of solid material slurries - Google Patents
Apparatus for the treatment of solid material slurriesInfo
- Publication number
- CA2045418A1 CA2045418A1 CA002045418A CA2045418A CA2045418A1 CA 2045418 A1 CA2045418 A1 CA 2045418A1 CA 002045418 A CA002045418 A CA 002045418A CA 2045418 A CA2045418 A CA 2045418A CA 2045418 A1 CA2045418 A1 CA 2045418A1
- Authority
- CA
- Canada
- Prior art keywords
- screen
- screen rollers
- rollers
- axial
- flow conveyor
- 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.)
- Abandoned
Links
Classifications
-
- 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
- B01D33/29—Filters with filtering elements which move during the filtering operation the movement of the filter elements being a combination of movements
- B01D33/31—Planetary movement
-
- 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
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
-
- 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
- B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
-
- 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
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Processing Of Solid Wastes (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Filtering Materials (AREA)
- Static Random-Access Memory (AREA)
- Read Only Memory (AREA)
- Logic Circuits (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Treatment Of Fiber Materials (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Abstract Proposed is an apparatus for the treatment of solid material slurries having at least one screen roller, in particular immersing into the slurry, on whose surface a solid material mat or fleece is formed by withdrawal of lugid and subsequently taken off the surface, having at least two, in particular at least three,screen rollers with parallel axes and identical rotating direction, a central axial-flow conveyor known poer se and driven in particular independently of the screen rollers in the space formed between the screen rollers, the conveying direction of the axial flow conveyor extending parallelto the axes of the screen rollers, and a treatment medium, in particular a washing liquid, being dispensed radially towards the outside by said conveyor and strippers on the screen rollers deflecting the solid material mat or fleecetaken off to the space formed between the screen rollers or to the next screen roller, are provided.
(Fig. 1).
(Fig. 1).
Description
g The invention relates to an apparatus for the treatment of solid material slurries having at least one screen roller, in particular immersing into the slurry, on whose surface a solid material mat or fleece is formed by withdrawal of liquid and subsequently taken off the surface.
Systems of this type are used, for instance, in the socalled wet process for forming fiber-containing cement products, the screen rollers being formed as suction rollers.
According to the invention, this known system is further developed mainly in that at least two, in Darticular at least three, screen rollers with parallel axes and identical rotating direction, a central axial-flow conveyor known per se and driven in particular indeoendently of the screen rollers in the space formed between the screen rollers, the conveying direction of the axial-flow conveyor extending parallel to the axes of the screen rollers, and a treatment medium, in particular a washing liquid, being dispensed radially towards the outside bysaid conveyor and strippers on the screen rollers deflecting the solid material mat or fleece to the space formed between the screen rollers or to the next screen roller are provided.
This provides an apparatus which is above all suitable as a continuous scrubber. Depending on the treatment medium, other functions such as the introduction of chemicals (e.g. bleaching agents for pulp) or steam are also possible, If no treatment medium is introduced, the apparatus operates as a filter (for instance for recovering mother liquors) or as a consistency-increasing pump. lheapparatus according to the invention can be used, for example, forconcentrating from an charging consistency of 0.1 to 12 percent of dry matter toa discharge consistency of 15 to 30 percent of dry matter.
Apparatus according to the invention can also be arranged in series or in parallel in a conventional manner.
The screen rollers are conveniently disposed symmetrically in relation to one another, in oarticular at equal distance between adjacent screen rollers.
According to the invention, the axial-flow conveyor is, in manner known per se, a perforated pipe with screw turns affixed to it.
Axial-flow conveyors disposed inside of perforated cylinders and formed as screw conveyors are known; so, for instance, FR-PS- 1391678 discloses this type of axial-flow conveyor disposed centrally within a rotating screen cylinder and SU-PS 1183591 within a stationary screen cylinder. DE-PS 46 641 discloses a pulpwasher provided with a bank of washing conveyors arranged in series whose shaft :, ., , , ~ .:
. ,, , , , ~ - : ~ ~ , ., ~ :.
.
in each case is formed as a perforated pipe with screw turns affixed thereto discharging washings to the outside. This has nothing to do with the arrangementaccording to the invention of an axial-flow conveyor in the free space formedbetween screen rollers; it does not render it obvious, either. According ~o a further characterizing feature of the invention, radial disintegrator projections, in particular knives, are provided on the axial-flow conveyor.
It is further convenient for the redistribution of the solid matter if the axial-flow conveyor has an increased number of revolutions per minute, in particular one that is five to twenty times higher, compared to that of the screen rollers, and is driven in particular in a direction counter to the rotating direction of the screen rollers.
The axial-flow conveyor itself may further be embodied as a pulp compacter in a manner known Der se. To this end, a screw conveyor used as an axial-flow conveyor can be passed in a perforated pipe outside of the range of the screen rollers, the diameter of the screw body increasing in conveying direction and the pitch decreasing. This is known in dewatering presses.
Screen rollers with separate stock feed may be provided instead of the screen rollers immersing into the solid matter slurry.
According to definition, the apparatus according to the invention is suitable for the treatment of all mat-forming or layer-forming solid materials, thus in particular for fibrous materials such as pulp or pa~er. As a result, a preferred application is the pulp-processing or paper-recycling industry l r wherein the apparatus according to the invention are mainly used as washers and '~
bleaching washers.
In this field, an excellent degree of efficiency, in particular a very high washing effect, is achieved, with the result of a reduced volume of washings andthus of effluents, which on the other hand largely reduces the expenditure forthe aftertreatment of effluents (for instance evaporating costs).
The aPparatus according to the 1nvention can be installed in any given position, in particular horizontally or vertically, and are of very simple construction, of a small construction volume at high degree of efficiency and require low driving energy and little control means.
The screen rollers can be formed as suction rollers; it is also possible, however, to supply only the solid matter slurry and the treatment medium underpressure, so that the screen rollers then form part of a draining system subject to atmospheric pressure.
For cleaning the apparatus according to the invention, the screen rollers may ...
. ~
" : , ,: . :.
~ . . . . .: ..
be flushed in counter-flow in a manner known Der se. The screen rollers used are conveniently perforated metal pipes, so that no screens oroper are required, or consist of a frame covered with screens (for instance ounched screens, bar screens or sinter screens).
The invention is explained in the following on the basis of an exemplary embodiment with reference to the accomDanying drawing, wherein Fig. l represents a longitudinal sectional view through a washing filter and Fig 2 represents a cross sectional view of the aoparatus according to Fig.
1.
In a cylindrical tank 1 provided with a peripheral inlet orifice ~ and an axial outlet 3 with discharge pipes 4, six axially extending screen cylinders 5 driven by a drive which is not represented are orovided equidis~ally along a circular path and rotated in an identical direction indicated by arrows 6 during the operation of the Dlant. The drive is effected via hollow shafts 7 serving as filtrate discharge. A central axial-flow conveyor 8 formed as a screw conveyorand conveying material to the outlet 3 is provided in the axle of the tank 1.The axial-flow conveyor can also be driven by a hollow shaft 9 piercing the tank wall and serving for feeding washing medium and is provided with a body in the form of a screen cylinder 9a onto which the screw turn 10 is affixed.
Each screen cylinder 5 is associated with a stripper blade 11 scraping off material deposited on the surfaces of the screen cylinders 5 and deflecting it into the interior annular space 12 located between the screen cylinders 5 and the axial-flow conveyor. The stripper blades 11 axially extend through the entire interior space of the tank 1. One each gap 13 connecting the interior annular space 12 with the outer annular space 14 located between the cylindrical outer wall of the tank l and the screen cylinders 5, space 14 receiving the material via the feed orifice 2, is provided between the stripper blades 11 and the respective adjacent screen cylinder (i.e. the cylinder with which the blade is not associated).
At rotating cylinders 5 and rotating axial-flow conveyor , a fibrous material suspension is introduced into the outer annular sDace 14 at a pressure which is higher than the pressure prevailing in the screen cylinders 5. As a result, liquid penetrates into the interior of the screen cylinders on the surface areaof the screen cylinders 5 facing the outer annular space 14 and a certain amount of fibrous matter adheres to the screen cylinder surface in the form of a mat orfleece and is entrained through the gap 13 into the area facing the interior annular space 1~ and finally scraped off there by the associated stri~per blade .
'', ,, ~
:,, . . :
- , ,; ,: ...
- 11 and deflected into the interior annular sPace 12.
At the same time, treatment medium (for instance washing liquid) is fed to the interior annular space l~ via the screen cylinder 9 of the axial-flow conveyor 8, also at higher pressure than the oressure prevailing in the screen cylinders, so that the treatment medium first comes into contact w;th scraped-off fibrous material present in the interior annular space 1~ and is subsequently forced from the interior annular space 12 through the fibrous material layer deDositedon the screen cylinders 5 into the interior of the screen cylinders.
The material filtered and treated in this way,i.e. the washed solid matter in the example previously descrihed, now present in the interior annular space 1~, is conveyed from the axial-flow conveyor 5 to the discharge orifice 3 and the discharge pipe 4.
In pr3ctlre, lt is preferred as c^mpared +? +he representatlon in Fig. 1 that the axial-flow conveyor 5 is longer than the tank 1 and is passed outside of the tank to the discharge orifice 3 in a cylindrical jacket pipe of which at leastsections are formed as a screen pipe for discharqing washing liquid which is then drained off in front of the discharge orifice 3. As initially mentioned, the axial-flow conveyor 5 can be embodied as a pressing element in this area in order to facilitate the discharqe of liquid.
As already mentioned, disintegrator elements can be provided on the axial-flow conveyor. This is particularly convenient in the case of highly cohesive solid materials stripped off the screen rollers.
In this case,it may be convenient to form the strippers in such a manner that a crimped, bored-open or cut-up product instead of a uniform material web is produced in stripping.
,~ ' .
Systems of this type are used, for instance, in the socalled wet process for forming fiber-containing cement products, the screen rollers being formed as suction rollers.
According to the invention, this known system is further developed mainly in that at least two, in Darticular at least three, screen rollers with parallel axes and identical rotating direction, a central axial-flow conveyor known per se and driven in particular indeoendently of the screen rollers in the space formed between the screen rollers, the conveying direction of the axial-flow conveyor extending parallel to the axes of the screen rollers, and a treatment medium, in particular a washing liquid, being dispensed radially towards the outside bysaid conveyor and strippers on the screen rollers deflecting the solid material mat or fleece to the space formed between the screen rollers or to the next screen roller are provided.
This provides an apparatus which is above all suitable as a continuous scrubber. Depending on the treatment medium, other functions such as the introduction of chemicals (e.g. bleaching agents for pulp) or steam are also possible, If no treatment medium is introduced, the apparatus operates as a filter (for instance for recovering mother liquors) or as a consistency-increasing pump. lheapparatus according to the invention can be used, for example, forconcentrating from an charging consistency of 0.1 to 12 percent of dry matter toa discharge consistency of 15 to 30 percent of dry matter.
Apparatus according to the invention can also be arranged in series or in parallel in a conventional manner.
The screen rollers are conveniently disposed symmetrically in relation to one another, in oarticular at equal distance between adjacent screen rollers.
According to the invention, the axial-flow conveyor is, in manner known per se, a perforated pipe with screw turns affixed to it.
Axial-flow conveyors disposed inside of perforated cylinders and formed as screw conveyors are known; so, for instance, FR-PS- 1391678 discloses this type of axial-flow conveyor disposed centrally within a rotating screen cylinder and SU-PS 1183591 within a stationary screen cylinder. DE-PS 46 641 discloses a pulpwasher provided with a bank of washing conveyors arranged in series whose shaft :, ., , , ~ .:
. ,, , , , ~ - : ~ ~ , ., ~ :.
.
in each case is formed as a perforated pipe with screw turns affixed thereto discharging washings to the outside. This has nothing to do with the arrangementaccording to the invention of an axial-flow conveyor in the free space formedbetween screen rollers; it does not render it obvious, either. According ~o a further characterizing feature of the invention, radial disintegrator projections, in particular knives, are provided on the axial-flow conveyor.
It is further convenient for the redistribution of the solid matter if the axial-flow conveyor has an increased number of revolutions per minute, in particular one that is five to twenty times higher, compared to that of the screen rollers, and is driven in particular in a direction counter to the rotating direction of the screen rollers.
The axial-flow conveyor itself may further be embodied as a pulp compacter in a manner known Der se. To this end, a screw conveyor used as an axial-flow conveyor can be passed in a perforated pipe outside of the range of the screen rollers, the diameter of the screw body increasing in conveying direction and the pitch decreasing. This is known in dewatering presses.
Screen rollers with separate stock feed may be provided instead of the screen rollers immersing into the solid matter slurry.
According to definition, the apparatus according to the invention is suitable for the treatment of all mat-forming or layer-forming solid materials, thus in particular for fibrous materials such as pulp or pa~er. As a result, a preferred application is the pulp-processing or paper-recycling industry l r wherein the apparatus according to the invention are mainly used as washers and '~
bleaching washers.
In this field, an excellent degree of efficiency, in particular a very high washing effect, is achieved, with the result of a reduced volume of washings andthus of effluents, which on the other hand largely reduces the expenditure forthe aftertreatment of effluents (for instance evaporating costs).
The aPparatus according to the 1nvention can be installed in any given position, in particular horizontally or vertically, and are of very simple construction, of a small construction volume at high degree of efficiency and require low driving energy and little control means.
The screen rollers can be formed as suction rollers; it is also possible, however, to supply only the solid matter slurry and the treatment medium underpressure, so that the screen rollers then form part of a draining system subject to atmospheric pressure.
For cleaning the apparatus according to the invention, the screen rollers may ...
. ~
" : , ,: . :.
~ . . . . .: ..
be flushed in counter-flow in a manner known Der se. The screen rollers used are conveniently perforated metal pipes, so that no screens oroper are required, or consist of a frame covered with screens (for instance ounched screens, bar screens or sinter screens).
The invention is explained in the following on the basis of an exemplary embodiment with reference to the accomDanying drawing, wherein Fig. l represents a longitudinal sectional view through a washing filter and Fig 2 represents a cross sectional view of the aoparatus according to Fig.
1.
In a cylindrical tank 1 provided with a peripheral inlet orifice ~ and an axial outlet 3 with discharge pipes 4, six axially extending screen cylinders 5 driven by a drive which is not represented are orovided equidis~ally along a circular path and rotated in an identical direction indicated by arrows 6 during the operation of the Dlant. The drive is effected via hollow shafts 7 serving as filtrate discharge. A central axial-flow conveyor 8 formed as a screw conveyorand conveying material to the outlet 3 is provided in the axle of the tank 1.The axial-flow conveyor can also be driven by a hollow shaft 9 piercing the tank wall and serving for feeding washing medium and is provided with a body in the form of a screen cylinder 9a onto which the screw turn 10 is affixed.
Each screen cylinder 5 is associated with a stripper blade 11 scraping off material deposited on the surfaces of the screen cylinders 5 and deflecting it into the interior annular space 12 located between the screen cylinders 5 and the axial-flow conveyor. The stripper blades 11 axially extend through the entire interior space of the tank 1. One each gap 13 connecting the interior annular space 12 with the outer annular space 14 located between the cylindrical outer wall of the tank l and the screen cylinders 5, space 14 receiving the material via the feed orifice 2, is provided between the stripper blades 11 and the respective adjacent screen cylinder (i.e. the cylinder with which the blade is not associated).
At rotating cylinders 5 and rotating axial-flow conveyor , a fibrous material suspension is introduced into the outer annular sDace 14 at a pressure which is higher than the pressure prevailing in the screen cylinders 5. As a result, liquid penetrates into the interior of the screen cylinders on the surface areaof the screen cylinders 5 facing the outer annular space 14 and a certain amount of fibrous matter adheres to the screen cylinder surface in the form of a mat orfleece and is entrained through the gap 13 into the area facing the interior annular space 1~ and finally scraped off there by the associated stri~per blade .
'', ,, ~
:,, . . :
- , ,; ,: ...
- 11 and deflected into the interior annular sPace 12.
At the same time, treatment medium (for instance washing liquid) is fed to the interior annular space l~ via the screen cylinder 9 of the axial-flow conveyor 8, also at higher pressure than the oressure prevailing in the screen cylinders, so that the treatment medium first comes into contact w;th scraped-off fibrous material present in the interior annular space 1~ and is subsequently forced from the interior annular space 12 through the fibrous material layer deDositedon the screen cylinders 5 into the interior of the screen cylinders.
The material filtered and treated in this way,i.e. the washed solid matter in the example previously descrihed, now present in the interior annular space 1~, is conveyed from the axial-flow conveyor 5 to the discharge orifice 3 and the discharge pipe 4.
In pr3ctlre, lt is preferred as c^mpared +? +he representatlon in Fig. 1 that the axial-flow conveyor 5 is longer than the tank 1 and is passed outside of the tank to the discharge orifice 3 in a cylindrical jacket pipe of which at leastsections are formed as a screen pipe for discharqing washing liquid which is then drained off in front of the discharge orifice 3. As initially mentioned, the axial-flow conveyor 5 can be embodied as a pressing element in this area in order to facilitate the discharqe of liquid.
As already mentioned, disintegrator elements can be provided on the axial-flow conveyor. This is particularly convenient in the case of highly cohesive solid materials stripped off the screen rollers.
In this case,it may be convenient to form the strippers in such a manner that a crimped, bored-open or cut-up product instead of a uniform material web is produced in stripping.
,~ ' .
Claims (8)
1. An apparatus for the treatment of solid material slurries, having at least one screen roller in particular immersing into the slurry, on whose surface a solid material mat or fleece is formed by withdrawal of liquid and subsequentlytaken off the surface, characterized in that at least two, in particular at least three, screen rollers with parallel axes and identical rotating direction, a central axial-flow conveyor known per se and driven in particular independentlyof the screen rollers in the space formed between the screen rollers, the conveying direction of the axial-flow conveyor extending parallel to the axes of the screen rollers, and a treatment medium, in particular a washing liquid, being dispensed radially towards the outside by said conveyor and strippers on the screen rollers deflecting the solid material mat or fleece taken off to thespace formed between the screen rollers or to the next screen roller, are provided.
2. The apparatus according to claim 1, wherein the screen rollers are arrangedsymmetrically in relation to one another, in particular at equal distances between adjacent screen rollers.
3. The apparatus according to claim 1 or 2, wherein the axial-flow conveyor ina manner known per se is a perforated pipe with screw turns affixed thereto.
4. The apparatus according to any one of the claims 1 to 3, wherein radial disintegrator projections, in particular knives, are provided on the axial-flow conveyor.
5. The apparatus according to claim 3 or 4, wherein the axial-flow conveyor rotates at a higher number of revolutions per minute, in particular one that is five to twenty times higher, as compared to that of the screen rollers.
6. The apparatus according to any one of the claims 3 to 5, wherein the axial-flow conveyor is driven in a direction counter to the rotating direction of thescreen rollers.
7. The apparatus according to any one of the claims 1 to 5, wherein the axial-flow conveyor is embodied as a pulp compacter in a manner known per se.
8. The apparatus according to any one of the claims 1 to 7, wherein screen rollers with separate stock feed are provided instead of screen rollers immersing into the solid material slurry.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0159590A AT394062B (en) | 1990-07-30 | 1990-07-30 | DEVICE FOR THE TREATMENT OF SOLIDS SLAVES |
| ATA1595/90 | 1990-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2045418A1 true CA2045418A1 (en) | 1992-01-31 |
Family
ID=3516823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002045418A Abandoned CA2045418A1 (en) | 1990-07-30 | 1991-06-25 | Apparatus for the treatment of solid material slurries |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT394062B (en) |
| CA (1) | CA2045418A1 (en) |
| DE (1) | DE4117684A1 (en) |
| ES (1) | ES2044750B1 (en) |
| FI (1) | FI913231A (en) |
| FR (1) | FR2665083A1 (en) |
| NO (1) | NO912507L (en) |
| PT (1) | PT98452A (en) |
| SE (1) | SE9101626L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113350886B (en) * | 2021-06-24 | 2022-06-07 | 徐州工程学院 | Multiple filtration equipment for sewage treatment |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE46641C (en) * | L. A. OTTO in Kottbus, Friedhofstr. 5 II. 1 | Wood pulp sorter | ||
| US1025922A (en) * | 1910-12-21 | 1912-05-07 | Partridge Smelting And Refining Company | Smelter. |
| DE426509C (en) * | 1925-02-07 | 1926-03-12 | Maschb Anstalt Humboldt | Shaft furnace with hearth crucible and a rust-like vault in this |
| BE373609A (en) * | 1929-10-02 | |||
| FR1114915A (en) * | 1954-09-30 | 1956-04-18 | Rotary filter | |
| DE1140906B (en) * | 1960-02-11 | 1962-12-13 | Krauss Maffei Imp G M B H & Co | Washing device for drum filter |
| FR1391678A (en) * | 1963-01-24 | 1965-03-12 | Ingersoll Rand Canada | Method and machine for treating mixtures containing fibrous materials |
| DE2236775A1 (en) * | 1972-07-26 | 1974-02-07 | Abramov Vadim P | PERMANENT FILTER |
| NO130977C (en) * | 1972-12-08 | 1975-03-19 | Myrens Verksted As | |
| DE2606619A1 (en) * | 1976-02-19 | 1977-08-25 | Hans Maassen | Rotary filter with rotating cells - having centrifugal discharge of cake |
| US4214736A (en) * | 1979-04-23 | 1980-07-29 | Westinghouse Electric Corp. | Arc heater melting system |
| SU1183591A1 (en) * | 1984-01-13 | 1985-10-07 | Научно-Исследовательский И Проектно-Конструкторский Институт Целлюлозного Машиностроения | Apparatus for sorting fibrous suspension |
| ES2028725A6 (en) * | 1991-03-08 | 1992-07-01 | Prats Lopez Jose | Improvements to devices for purifying paper pulp |
-
1990
- 1990-07-30 AT AT0159590A patent/AT394062B/en not_active IP Right Cessation
-
1991
- 1991-05-29 SE SE9101626A patent/SE9101626L/en not_active Application Discontinuation
- 1991-05-29 DE DE4117684A patent/DE4117684A1/en not_active Withdrawn
- 1991-06-24 ES ES09101494A patent/ES2044750B1/en not_active Expired - Lifetime
- 1991-06-25 CA CA002045418A patent/CA2045418A1/en not_active Abandoned
- 1991-06-26 NO NO91912507A patent/NO912507L/en unknown
- 1991-07-03 FI FI913231A patent/FI913231A/en not_active Application Discontinuation
- 1991-07-19 FR FR9109321A patent/FR2665083A1/en active Pending
- 1991-07-25 PT PT98452A patent/PT98452A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2665083A1 (en) | 1992-01-31 |
| ATA159590A (en) | 1991-07-15 |
| ES2044750B1 (en) | 1995-10-16 |
| FI913231A0 (en) | 1991-07-03 |
| PT98452A (en) | 1993-08-31 |
| NO912507L (en) | 1992-01-31 |
| NO912507D0 (en) | 1991-06-26 |
| AT394062B (en) | 1992-01-27 |
| DE4117684A1 (en) | 1992-02-06 |
| SE9101626L (en) | 1992-01-31 |
| SE9101626D0 (en) | 1991-05-29 |
| ES2044750R (en) | 1995-04-01 |
| FI913231A (en) | 1992-01-31 |
| ES2044750A2 (en) | 1994-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4286512A (en) | Screw-press | |
| US3241676A (en) | Dewatering method and apparatus | |
| US4919158A (en) | Method and apparatus for washing pulp | |
| JPH0246715B2 (en) | ||
| SE445365B (en) | SET AND DEVICE TO CLEAN CELLULOSA | |
| US4215447A (en) | Process and apparatus for washing fibre stock in the de-inking of paper | |
| US4686005A (en) | Method of washing stock suspensions by removing undesired material through an endless revolving wire | |
| CA2231551C (en) | Supply of washing liquid in a fractionating multi-stage washer | |
| FI89520B (en) | Anordning Foer behandling av massa | |
| GB2115714A (en) | Apparatus for remoistening filter cake in a dewatering machine | |
| US4589923A (en) | Apparatus for removing liquid from fibrous materials | |
| US4138338A (en) | Filter for thickening suspensions of fibrous material | |
| FI90792C (en) | Method and apparatus for purifying a fiber suspension | |
| SE461990B (en) | METHOD AND APPARATUS FOR WASHING PAPER Pulp | |
| EP0853699A1 (en) | Apparatus for dewatering/pressing in combination with washing of paper pulp | |
| JPS5920038B2 (en) | Textile raw material cleaning method and equipment | |
| DE69010123T2 (en) | Ash removal device for waste paper in suspension. | |
| CA2045418A1 (en) | Apparatus for the treatment of solid material slurries | |
| US2037840A (en) | Continuous centrifugal washing and dewatering machine | |
| US3114309A (en) | Centrifugal thickener for paper pulp | |
| CA2049952C (en) | A process and apparatus for continuous filtering and liquid displacement of a liquid suspension of a fibrous or finely-divided material | |
| JPH0718112B2 (en) | Pressurized dynamic cleaning device | |
| US3557583A (en) | Pulp strainer | |
| JPH0698514B2 (en) | Screw press | |
| US5732618A (en) | Apparatus for separating liquid from a material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |