CA1085229A - Apparatus for continuously expressing liquid from a material - Google Patents
Apparatus for continuously expressing liquid from a materialInfo
- Publication number
- CA1085229A CA1085229A CA311,875A CA311875A CA1085229A CA 1085229 A CA1085229 A CA 1085229A CA 311875 A CA311875 A CA 311875A CA 1085229 A CA1085229 A CA 1085229A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- pressing
- liquid
- screening
- discharging
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
- B30B9/247—Pressing band constructions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Filtration Of Liquid (AREA)
- Preparation Of Fruits And Vegetables (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Apparatus for continuously pressing material, more particularly heterogeneous material, e.g. peat, cellulose pulp, fruit pulp, and ground olives, so as to express the liquid. The apparatus comprises at least one pressing zone comprising one belt consisting of pressure-resilient material and one screening belt, a feed means for the material being provided to distribute the material over an inner zone of the pressing belt.
Apparatus for continuously pressing material, more particularly heterogeneous material, e.g. peat, cellulose pulp, fruit pulp, and ground olives, so as to express the liquid. The apparatus comprises at least one pressing zone comprising one belt consisting of pressure-resilient material and one screening belt, a feed means for the material being provided to distribute the material over an inner zone of the pressing belt.
Description
1/L~852Z5~
.
Gebruder Sulzer, ~ktiengesellschaf*, of Winter*hur, Switzerland Apparatus for continuously pressing material to express the liquid therefrom This invention relates to an apparatus for con-tinuously pressing material so as to express the liquid therefrom, comprising at least one pressing zone comprising at least one pressing belt and at least one screening belt, a feed means also being provided for material to distribute the latter over an inner region of the pressing belt.
The term material undergoing pressing is used in this context to denote, for example, peat, cellulose or fruit pulp, ground olives and the like. More particularly, the invention is to be applied to heterogeneous material for pressing which has, for example, hard and soft particles e.g. peat, which contains hard coarse particles such as knots for example.
It is known to de-water such material by means ;;~
of static pressing devices.
Pressing devices of this kind, however, have all the disadvantages of intermittent operation.
The disadvantage of a static press of known construction operating intermittently in this way can be obviated in principle by continuous screening belt presses of conventional construction. The known screening belt presses, however, give only inadequate dryness - , : . : . : ...................... ., ~, ,. . - . .
, , , " , . , ................... , ,~. ,, , ,,;
::: . , ; ,~
~Lf~f~5Zf'h~
.
Gebruder Sulzer, ~ktiengesellschaf*, of Winter*hur, Switzerland Apparatus for continuously pressing material to express the liquid therefrom This invention relates to an apparatus for con-tinuously pressing material so as to express the liquid therefrom, comprising at least one pressing zone comprising at least one pressing belt and at least one screening belt, a feed means also being provided for material to distribute the latter over an inner region of the pressing belt.
The term material undergoing pressing is used in this context to denote, for example, peat, cellulose or fruit pulp, ground olives and the like. More particularly, the invention is to be applied to heterogeneous material for pressing which has, for example, hard and soft particles e.g. peat, which contains hard coarse particles such as knots for example.
It is known to de-water such material by means ;;~
of static pressing devices.
Pressing devices of this kind, however, have all the disadvantages of intermittent operation.
The disadvantage of a static press of known construction operating intermittently in this way can be obviated in principle by continuous screening belt presses of conventional construction. The known screening belt presses, however, give only inadequate dryness - , : . : . : ...................... ., ~, ,. . - . .
, , , " , . , ................... , ,~. ,, , ,,;
::: . , ; ,~
~Lf~f~5Zf'h~
-2-contents for the substances indicated, or else the output is too low if the dryness is increased.
Complex sealing systems are also required to pre~ent the material from escaping from the sides of the pressing ~one.
Uneven distribution and, as already stated, heterogeneous material are another problem, because they mean that the material is unevenly distributed in the screening ~felt press.
~ It has already been proposed to obviate these disadvantages by using filter belts of porous elastic material. A basic disadvantage of such porous elastic filter belts is that fine particles of the material are suspended with the filtrate liff~uid into the pores, where the fine particles concentrate and thus reduce the filter belt permeability.
If the fine particules received in the filter consist of organic material, putrefaction sites may form in the filter belt and contaminate the material or the filtrate.
Experiments ha~e also shown thatthe said filter belts have only an inadequate life of the order of about 10 operating hours. This is because the fine particles retained in the pores successively reduce the permeability of the ~ilter belt so that the filtrate liquid can eventually emerge from the pressing zone mainly only laterally.
,.,.,: . . . '. f .,, , ' . '.
,: ' :: ' ' '' ,. :', ;,', ,, .'`.' ' :: ,:' : '. ,, .,: ,~, ,,':. ": ,, :~'': . , :,:, . . ' ' ': . ~: : ..
: ' . : :, . .: . .: - . ' ,' .: '' . ' ', '' ~,., :; . ,. ~ ' ' :' , ` 10~52Z~
~3~
The resulting speeds of the filtrate liquid are then such that the cellular structure of the filter belt is rapidly destroyed. It is extremely complex and time-consuming to clean such filter belts so their use is economically unsuitable.
The object of the învention is so to develop an apparatus for the continuous pressin~ of material to express the liquid therefrom, more particularly hetero-geneous material, that the disadvantages of the above-described known apparatus are obviated.
To this end~ according to the invention, the pressing belt consists of a material in the form of foam rubber and is liquid-tight at least on its side facing the material undergoing pressing and bears by its edge parts, in the pressing zone, on the edge parts of the screening belt discharging the liquid.
Since the pressing belt consists of a material after the style of foam rubber, e.g. a foam plastic, for example polyurethane or a foamed natural rubber, also known as sponge rubber, the pressing belt being liquid~
tight at least on the side facing the material undergoing pressing, the following effects are achieved because of the pressure-resilient properties of the foam-rubber like material:
al Isostatic pressure distribution over the pressing zone independently of the heterogeneity of the material undergoing pressing and any uneven distribution -- of the material, ~a~13522~
b) The material undergoing pressing is pre-vented from escaping la-terally from the pressing zone and c) Des-truction of the pressing belt itself is avoided because it is made liquid-tight on its side facing the material undergoing pressing, e.g. by impreg-nation, the application of a foil or sheeting or the like.
The material undergoing pressing is enclosed from the outside not only by the pressing belt but by a screening belt through which the filtrate liquid flows away. This screening belt may, for example~ consist of a perforate metal belt or an open-mesh textile fabric and can readily be cleaned, e.g. by means of scrapers or in known manner by jets of water under pressure sprayed intermittently or continuously, the dirty water being discharged into collecting tanks.
Further features of the invention will be apparent from the exemplified embodiments of the inven-tion illustrated in the drawing and explained below:
Fig. 1 is a diagram showing a continuously operating press for heterogeneous material, e.g. peat, in longitudinal section while Figs. 2 - 5 are different embodiments of pressing zones in cross-section on the sectional line A-A in Fig. 1 and Fig. 3a is a detail of Fig. 3 with a porous pressing belt, the pores of which are gas-filled while Figs. 5a and 5b are details of the bottom .. , ., ~:. . :: . , :. : - :. .:.. :,: : :: .. . ...... .. , :
; ~
~6~852;~9 belt of Fig. 5 respectively in plan view and cross-section on the sectional line B-B corresponding to Fig.
5b.
The continuously operating press shown in Fig. l consists in principle of two screening belts l and 2, which converge wedge-fashion and which may be either perforated throughout or be imperforate, for example, in their edge portions. A press belt 3 consisting of pressure-resilient material is placed on the screening belt l and, for example, consists of contiguous pla-tes or panels, while a belt 4 of elastic material is placed on the screening belt 2 and has spaced perforations (see Fig. 3 and 4~ to discharge the filtrate liquid or transverse and longitudinal grooves disposed in a honeycomb pattern (see Figs. 5, 5a and 5~).
The belts 3 and 4 may, for example, consist of sponge rubber or a foam plastic, while the screening belts l and 2 may consist of a fine-meshed plastic fabric.
The screening belts 1 and 2 are, for example, about 700 mm wide and about 5 mm thick while the belts
Complex sealing systems are also required to pre~ent the material from escaping from the sides of the pressing ~one.
Uneven distribution and, as already stated, heterogeneous material are another problem, because they mean that the material is unevenly distributed in the screening ~felt press.
~ It has already been proposed to obviate these disadvantages by using filter belts of porous elastic material. A basic disadvantage of such porous elastic filter belts is that fine particles of the material are suspended with the filtrate liff~uid into the pores, where the fine particles concentrate and thus reduce the filter belt permeability.
If the fine particules received in the filter consist of organic material, putrefaction sites may form in the filter belt and contaminate the material or the filtrate.
Experiments ha~e also shown thatthe said filter belts have only an inadequate life of the order of about 10 operating hours. This is because the fine particles retained in the pores successively reduce the permeability of the ~ilter belt so that the filtrate liquid can eventually emerge from the pressing zone mainly only laterally.
,.,.,: . . . '. f .,, , ' . '.
,: ' :: ' ' '' ,. :', ;,', ,, .'`.' ' :: ,:' : '. ,, .,: ,~, ,,':. ": ,, :~'': . , :,:, . . ' ' ': . ~: : ..
: ' . : :, . .: . .: - . ' ,' .: '' . ' ', '' ~,., :; . ,. ~ ' ' :' , ` 10~52Z~
~3~
The resulting speeds of the filtrate liquid are then such that the cellular structure of the filter belt is rapidly destroyed. It is extremely complex and time-consuming to clean such filter belts so their use is economically unsuitable.
The object of the învention is so to develop an apparatus for the continuous pressin~ of material to express the liquid therefrom, more particularly hetero-geneous material, that the disadvantages of the above-described known apparatus are obviated.
To this end~ according to the invention, the pressing belt consists of a material in the form of foam rubber and is liquid-tight at least on its side facing the material undergoing pressing and bears by its edge parts, in the pressing zone, on the edge parts of the screening belt discharging the liquid.
Since the pressing belt consists of a material after the style of foam rubber, e.g. a foam plastic, for example polyurethane or a foamed natural rubber, also known as sponge rubber, the pressing belt being liquid~
tight at least on the side facing the material undergoing pressing, the following effects are achieved because of the pressure-resilient properties of the foam-rubber like material:
al Isostatic pressure distribution over the pressing zone independently of the heterogeneity of the material undergoing pressing and any uneven distribution -- of the material, ~a~13522~
b) The material undergoing pressing is pre-vented from escaping la-terally from the pressing zone and c) Des-truction of the pressing belt itself is avoided because it is made liquid-tight on its side facing the material undergoing pressing, e.g. by impreg-nation, the application of a foil or sheeting or the like.
The material undergoing pressing is enclosed from the outside not only by the pressing belt but by a screening belt through which the filtrate liquid flows away. This screening belt may, for example~ consist of a perforate metal belt or an open-mesh textile fabric and can readily be cleaned, e.g. by means of scrapers or in known manner by jets of water under pressure sprayed intermittently or continuously, the dirty water being discharged into collecting tanks.
Further features of the invention will be apparent from the exemplified embodiments of the inven-tion illustrated in the drawing and explained below:
Fig. 1 is a diagram showing a continuously operating press for heterogeneous material, e.g. peat, in longitudinal section while Figs. 2 - 5 are different embodiments of pressing zones in cross-section on the sectional line A-A in Fig. 1 and Fig. 3a is a detail of Fig. 3 with a porous pressing belt, the pores of which are gas-filled while Figs. 5a and 5b are details of the bottom .. , ., ~:. . :: . , :. : - :. .:.. :,: : :: .. . ...... .. , :
; ~
~6~852;~9 belt of Fig. 5 respectively in plan view and cross-section on the sectional line B-B corresponding to Fig.
5b.
The continuously operating press shown in Fig. l consists in principle of two screening belts l and 2, which converge wedge-fashion and which may be either perforated throughout or be imperforate, for example, in their edge portions. A press belt 3 consisting of pressure-resilient material is placed on the screening belt l and, for example, consists of contiguous pla-tes or panels, while a belt 4 of elastic material is placed on the screening belt 2 and has spaced perforations (see Fig. 3 and 4~ to discharge the filtrate liquid or transverse and longitudinal grooves disposed in a honeycomb pattern (see Figs. 5, 5a and 5~).
The belts 3 and 4 may, for example, consist of sponge rubber or a foam plastic, while the screening belts l and 2 may consist of a fine-meshed plastic fabric.
The screening belts 1 and 2 are, for example, about 700 mm wide and about 5 mm thick while the belts
3 and 4 are about 500 mm ~ide and have a coating of a thickness of about 20 mm. The material 5 which is to be pressed and de-watered during operation, e.g. peat ~see Figs. 2 ~ 5), is disposed in the pressing zone between the screening belts l and 2 and the belts 3 and 4.
~52;2~
., , The machine pressing zone has a number of rollers 9 and 10 disposed in pairs. A collector 11 for the fil-trate is disposed beneath the screening belts 2 and the elastic belt 4 in the pressing zone. The material is de-watered in the pressing zone purely mechanically by pressure being exerted in the gap 12.
In the exemplified embodiment, only the two rollers 13 and 14 are driven outside the pressing zone so as to rotate in opposite directions, e.g. via a chain drive.
During operation of the press, the material 5 ;-for de-watering is introduced into the press by a feed means 15 which is shown only diagrammatically.
The material, e.g. peat, is pre-dewatered in the pressing zone by the pressure exerted thereon by the pairs of rollers 9 and 10 covered by the belts, the expressed water flowing away through the screening belt 2 or the ducts in the belt 4 or the grooves on the belt (see Figs.
5, 5a and 5b~ and flows to the collecting tank 11. If, for example, the material, e.g. peat, has a moisture content of about 92%, it can be reduced to at least 72%
in the peat press. Subsequent drying by heat can thus be economic.
The pre-de-watered peat is delivered by the screening belt 2 to a conveyor system (not shown).
The elastic belts 3 and 4 applied to the screening belts 1 and 2 need not be cleaned before the coated screening belts return to the entry zone for the material .: . .. : - .: , . : - .............. , . , . , , - : :
, , .: :., . . ; .. . ; .: . . .
: ' ~352~
~7--for de~watering. Only the fine particles adhering to the screening belts 1 and 2 have to be removed before the screening belts return to the pressing zone.
As already stated, this cleaning operation can be done by known means, e.g. scrapers 16, while the de-watered material 5 is removed from the bottom screeniny belt 2 by means of scrapers 17.
The screening belts 1, 2 and the belts 3, 4 are rotated with the aid of rollers 18 to 31 which act as tensioning, reversing, supporting or bearer rollers respectively.
Figs. 2 - 5 show different embodiments in cross-section through a pressing zone on the sectional line A-~ Qf the press sho~n in ~g. 1, the~cross-section A-A
bein~ the sa~e in any part of the pressing zone.
In all the embodiments, the pressing rollers have been given the references 9 and 10. ;~
In Figs. 2 - 5, the pressing zone comprises a belt 3 of pressure-resilient material, consisting for example, of a foam material with gas-filled pores 32 rsee Fig. 3a). At least on their sides facing the material 5 undergoing pressing, the pressing belts 3 are impregnated, for example, to make them li~uid-tight, although this is not shown.
Screening belts 1 are also applied to the belts 3 according to Figs. 4 and 5, at their surfaces facing the material 5 undergoing pressing. This step simplifies the removal of fine particles of material.
~ I ' ! ~ , ' . ' ; i .
' '' ' "' ' ' "' '.~ ~''"'` "' ; ' . '', ,' zz~
~8-While the filtrate in Fig. 2 flows away from the heterogeneous material solely through the apertures 33 in the screening belt 2, belts 4 preferably also consisting of a pressure-resilient material are disposed beneath the screening belts 2 according to the embodiments shown in Figs. 3 and 4. The belts 4, which are also liquid~tight at least at their surfaces facing the screening belts 2, have ducts 34 for the discharge of the filtrate.
Finally, a screening belt 1 is applied or glued (see Fig. 1~ to the pressing belt surface facing the material undergoing pressing. As already stated, this step enables these screening belts to be easily ;
cleaned outside the pressing zone. Figs. 5, 5a and 5b also show a pressing belt 35 in addition to the screening belt 2, belt 35 having a honeycomb-like surface structure with longitudinal and transverse grooves 36 for discharging the filtrate outwardly into collecting tanks (not shown).
If required, the surface structure of the belt 35 may ha~e simply longitudinal grooves or just transverse grooves to discharge the filtrate.
With-the invention it is possible advantageously to enclose the material, particularly hetero~eneous material, on the screening belts 2, on three sides by means of the pressurewresilient belts 3, and on the fourth side b~ a screening belt 2 or screening belts 2, ,. . . ,, , . . . .. , , . : : . .
10~352Z9 which are disposed on pressure-resilient filters belts
~52;2~
., , The machine pressing zone has a number of rollers 9 and 10 disposed in pairs. A collector 11 for the fil-trate is disposed beneath the screening belts 2 and the elastic belt 4 in the pressing zone. The material is de-watered in the pressing zone purely mechanically by pressure being exerted in the gap 12.
In the exemplified embodiment, only the two rollers 13 and 14 are driven outside the pressing zone so as to rotate in opposite directions, e.g. via a chain drive.
During operation of the press, the material 5 ;-for de-watering is introduced into the press by a feed means 15 which is shown only diagrammatically.
The material, e.g. peat, is pre-dewatered in the pressing zone by the pressure exerted thereon by the pairs of rollers 9 and 10 covered by the belts, the expressed water flowing away through the screening belt 2 or the ducts in the belt 4 or the grooves on the belt (see Figs.
5, 5a and 5b~ and flows to the collecting tank 11. If, for example, the material, e.g. peat, has a moisture content of about 92%, it can be reduced to at least 72%
in the peat press. Subsequent drying by heat can thus be economic.
The pre-de-watered peat is delivered by the screening belt 2 to a conveyor system (not shown).
The elastic belts 3 and 4 applied to the screening belts 1 and 2 need not be cleaned before the coated screening belts return to the entry zone for the material .: . .. : - .: , . : - .............. , . , . , , - : :
, , .: :., . . ; .. . ; .: . . .
: ' ~352~
~7--for de~watering. Only the fine particles adhering to the screening belts 1 and 2 have to be removed before the screening belts return to the pressing zone.
As already stated, this cleaning operation can be done by known means, e.g. scrapers 16, while the de-watered material 5 is removed from the bottom screeniny belt 2 by means of scrapers 17.
The screening belts 1, 2 and the belts 3, 4 are rotated with the aid of rollers 18 to 31 which act as tensioning, reversing, supporting or bearer rollers respectively.
Figs. 2 - 5 show different embodiments in cross-section through a pressing zone on the sectional line A-~ Qf the press sho~n in ~g. 1, the~cross-section A-A
bein~ the sa~e in any part of the pressing zone.
In all the embodiments, the pressing rollers have been given the references 9 and 10. ;~
In Figs. 2 - 5, the pressing zone comprises a belt 3 of pressure-resilient material, consisting for example, of a foam material with gas-filled pores 32 rsee Fig. 3a). At least on their sides facing the material 5 undergoing pressing, the pressing belts 3 are impregnated, for example, to make them li~uid-tight, although this is not shown.
Screening belts 1 are also applied to the belts 3 according to Figs. 4 and 5, at their surfaces facing the material 5 undergoing pressing. This step simplifies the removal of fine particles of material.
~ I ' ! ~ , ' . ' ; i .
' '' ' "' ' ' "' '.~ ~''"'` "' ; ' . '', ,' zz~
~8-While the filtrate in Fig. 2 flows away from the heterogeneous material solely through the apertures 33 in the screening belt 2, belts 4 preferably also consisting of a pressure-resilient material are disposed beneath the screening belts 2 according to the embodiments shown in Figs. 3 and 4. The belts 4, which are also liquid~tight at least at their surfaces facing the screening belts 2, have ducts 34 for the discharge of the filtrate.
Finally, a screening belt 1 is applied or glued (see Fig. 1~ to the pressing belt surface facing the material undergoing pressing. As already stated, this step enables these screening belts to be easily ;
cleaned outside the pressing zone. Figs. 5, 5a and 5b also show a pressing belt 35 in addition to the screening belt 2, belt 35 having a honeycomb-like surface structure with longitudinal and transverse grooves 36 for discharging the filtrate outwardly into collecting tanks (not shown).
If required, the surface structure of the belt 35 may ha~e simply longitudinal grooves or just transverse grooves to discharge the filtrate.
With-the invention it is possible advantageously to enclose the material, particularly hetero~eneous material, on the screening belts 2, on three sides by means of the pressurewresilient belts 3, and on the fourth side b~ a screening belt 2 or screening belts 2, ,. . . ,, , . . . .. , , . : : . .
10~352Z9 which are disposed on pressure-resilient filters belts
4 and 35.
Consequently, even i the material is distributed unevenly and even if it contains coarse particles in addition to fine particles, a basically uniform pressure is exerted on the material as a result of an at least substantially isostatic pressure distribution in the or each pressure-resilient pressing belt, so that the material is de-watered at least substantially uniformly.
:, ,. : : : ,-:, ,, , :: , ; :;
: . . : . . ~ : . .. : . , , ., .: ,., ~ . :, , :: , : ., , ; ~ . . .
Consequently, even i the material is distributed unevenly and even if it contains coarse particles in addition to fine particles, a basically uniform pressure is exerted on the material as a result of an at least substantially isostatic pressure distribution in the or each pressure-resilient pressing belt, so that the material is de-watered at least substantially uniformly.
:, ,. : : : ,-:, ,, , :: , ; :;
: . . : . . ~ : . .. : . , , ., .: ,., ~ . :, , :: , : ., , ; ~ . . .
Claims (16)
1. Apparatus for continuously pressing material so as to express the liquid therefrom, comprising at least one pressing zone comprising at least one pressing belt and least one screening belt, a feed means also being provided for material to distribute the latter over an inner region of the pressing belt, characterised in that the pressing belt consists of a pressure-elastic, foam-rubber-like material and is liquid-tight at least on its side facing the material undergoing pressing and bears by its edge parts, in the pressing zone, on the edge parts of the screening belt discharging the liquid.
2. Apparatus according to claim 1, characterised in that the edge parts of the screening belt do not have apertures.
3. Apparatus according to claim 1, characterised in that the screening belt rests on a liquid-discharging belt which has ducts for discharging the filtrate.
4. Apparatus according to claim 1, characterised in that the pressing belt consists of a foam plastic.
5. Apparatus according to claim 1, characterised in that the pressing belt consists of foamed natural rubber.
6. Apparatus according to claim 1, characterised in that at least the pressing belt surface enclosing the material undergoing pressing is rendered liquid-tight by impregnation, application of a foil or sheeting or the like.
7. Apparatus according to claim 1, characterised in that the pressing belt has gas-filled closed pores.
8. Apparatus according to claim 1, characterised in that an additional screening belt is placed on the pressing belt on the side which during operation faces the material undergoing pressing.
9. Apparatus according to claim 3, characterised in that the liquid-discharging belt has spaced perforations as ducts.
10. Apparatus according to claim 3, characterised in that the ducts of that surface of the liquid-expressing belt which during operation faces the material undergoing pressing are constructed as longitudinal grooves or as transverse grooves.
11. Apparatus according to claim 3, characterised in that the ducts on that surface of the liquid-discharging belt which during operation faces the material undergoing pressing are formed by a honeycomb-like pattern.
12. Apparatus according to claim 3, characterised in that the liquid-discharging belt consists of a liquid-impermeable natural rubber.
13. Apparatus according to claim 3, characterised in that the liquid-discharging belt consists of a liquid-impermeable plastic.
14. Apparatus according to claim 3, characterised in that the liquid-discharging belt consists of a metal.
15. Apparatus according to claim 3, characterised in that the liquid-discharging belt consists of a textile material impregnated with an elastomeric substance.
16. Apparatus according to claim 1, characterised in that the screening belt consists of a fine-mesh plastic fabric.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1190077 | 1977-09-29 | ||
| CH011900/77 | 1977-09-29 | ||
| CH113178A CH623510A5 (en) | 1978-02-02 | 1978-02-02 | Apparatus for the continuous pressing out of liquid from material to be pressed |
| CH1131/78-2 | 1978-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1085229A true CA1085229A (en) | 1980-09-09 |
Family
ID=25686736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA311,875A Expired CA1085229A (en) | 1977-09-29 | 1978-09-22 | Apparatus for continuously expressing liquid from a material |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT359376B (en) |
| CA (1) | CA1085229A (en) |
| DE (1) | DE7825040U1 (en) |
| FI (1) | FI782755A (en) |
| FR (1) | FR2404518A1 (en) |
| GB (1) | GB2004763B (en) |
| NL (1) | NL7804119A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI77991C (en) * | 1986-06-04 | 1989-06-12 | Ahlstroem Oy | Wrap at a filtration press |
| DE4332954C1 (en) * | 1993-09-28 | 1994-06-16 | Santrade Ltd | Durable flexible endless belt including geometric full width wire strand chain lattice - includes regular inter-strand spaces, used for making granular products from solidifying solids. |
| EP0686353A1 (en) * | 1994-06-10 | 1995-12-13 | Flottweg GmbH | Device and process for producing vegetable oil from olives or similar oil holding fruits |
| DE19517869A1 (en) * | 1995-05-16 | 1996-11-21 | Amos Anlagentechnik | Press device for withdrawing liquid from a good |
| DE102004048895A1 (en) * | 2004-10-06 | 2006-04-20 | Heinrich Bornhorst | Tractor-drawn or self-powered peat harvesting assembly has bucket excavator discharging to coarse sieve and press |
| US11890828B2 (en) * | 2019-12-30 | 2024-02-06 | Idaho Forest Group, LLC | Moisture extraction press and moisture removal from wood materials |
| CN114632794A (en) * | 2022-04-02 | 2022-06-17 | 沈阳农业大学 | Device for preparing biochar by utilizing wet crop straws and tail vegetables |
-
1978
- 1978-04-18 NL NL7804119A patent/NL7804119A/en not_active Application Discontinuation
- 1978-08-23 DE DE19787825040 patent/DE7825040U1/en not_active Expired
- 1978-09-08 FI FI782755A patent/FI782755A/en unknown
- 1978-09-22 CA CA311,875A patent/CA1085229A/en not_active Expired
- 1978-09-22 AT AT685378A patent/AT359376B/en not_active IP Right Cessation
- 1978-09-27 GB GB7838327A patent/GB2004763B/en not_active Expired
- 1978-09-28 FR FR7827779A patent/FR2404518A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| ATA685378A (en) | 1980-03-15 |
| AT359376B (en) | 1980-11-10 |
| NL7804119A (en) | 1979-04-02 |
| GB2004763A (en) | 1979-04-11 |
| FR2404518B3 (en) | 1981-07-24 |
| FR2404518A1 (en) | 1979-04-27 |
| DE7825040U1 (en) | 1979-03-15 |
| GB2004763B (en) | 1982-03-03 |
| FI782755A (en) | 1979-03-30 |
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