CA1060262A - Filter presses - Google Patents
Filter pressesInfo
- Publication number
- CA1060262A CA1060262A CA276,750A CA276750A CA1060262A CA 1060262 A CA1060262 A CA 1060262A CA 276750 A CA276750 A CA 276750A CA 1060262 A CA1060262 A CA 1060262A
- Authority
- CA
- Canada
- Prior art keywords
- belts
- press according
- filter press
- filter
- suspension
- 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
- B30B9/246—The material being conveyed around a drum between pressing bands
-
- 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
- B01D33/03—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
-
- 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
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
- B01D33/042—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering whereby the filtration and squeezing-out take place between at least two filtering bands
-
- 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
- B01D33/056—Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
-
- 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
- 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
- B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Saccharide Compounds (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
ABSTRACT
A filter press for the removal of the liquid component from a suspension comprising two endless filter belts which in one section of the press are brought together so as to entrain the suspension therebetween and which are then guided around a plurality of rollers, character-ised in that at least one of said rollers is comprised by a plurality of axially extending circumferentially spaced bars extending between the opposite ends of the roller.
A filter press for the removal of the liquid component from a suspension comprising two endless filter belts which in one section of the press are brought together so as to entrain the suspension therebetween and which are then guided around a plurality of rollers, character-ised in that at least one of said rollers is comprised by a plurality of axially extending circumferentially spaced bars extending between the opposite ends of the roller.
Description
THIS INVE~ION concerns filter presses for the removal of the liquid component from suspensions such as sludges or slurries of various kinds particularly, though by no means exclusively, from sludges obtained in the treatment of sewage.
According to the present invention, a filter press for the removal of the liquid component from a suspension comprises two endless filter belts which in one section of the press are brought together so as to entrain the suspension there-between and which are then guided around a plurality of rollers, characterised in that at least one of said rollers is comprised by a plurality of axially extending circumferentially spaced bars extending between the opposite ends of the rolIer.
The invention will be further apparent from the following description with reference to the several figures of the accompanying drawings which show, by way of example only, in diagrammatic form, one filter press embodying the invention.
Of the drawings;-Fig. 1 shows a side elevation of the press;
. '~
Fig. 2 shows a ragmentary cross-section through the periphery of the perforated rollers of the press of Fig. l;
Fig. 3 shows a side elevation of one of the rollers of the press of Fig. l;
and Fig. 4 shows a cross-section through the roller of Fig. 3 on the line IV-IV
thereof.
Referring now to the drawings, it will be seen that the filter press is essentially comprised by upper and lower endless filter belts 10 and 11 respectively each formed from a woven synthetic filament.
In one section of the press the belts pass in superimposed relationship over a plurality of guide rollers 12 to 18 inclusive. The lower belt 10 is guided towards the roller 12 by a guide roller 19 and away from the roller 18 by guide rollers 20 and 21 for return to the guide roller 19.
The upper belt 11 is guided towards the roller 12 by a guide roller 22 and away from the roller 18 by guide rollers 23 and 24 for return to the guide roller 22.
The filter belt 10 extends horizontally for a substantial distance (of the order of two metres) between the guide roller 19 and the roller 12. The belt 10 is supported between the rollers 19 and 12 on a perforated plate or grid 25 to be referred to in greater detail hereinafter.
The rollers 12, 14, 16 and 18 are arranged with their axes lying in a horizontal plane whilst the rollers 13, 15 and 17 are arranged with their axes lying in a further horizontal plane beneath the plane containing the axes of .
the rollers 12, 14. 16 and 18.
The rollers 13, 15 and 17 are disposed between the rollers 12 and 14, 14 and 16 and 16 and 18 respectively and the spacings between the rollers 12 and 14, 14 and 16 and 16 and 18 are not greater than the diameters of the rollers 13, 15 and 17 respectively, whereby the belts 10 and 11 lap each of the rollers 13 to 17 inclusive by at least 180.
The rollers 20 and 22 are mounted on pivoted arms 40 carrying weights 41 which urge them outwardly in the direction of the arrows X, thus to tension the belts 10 and 11 respectively.
.
Motor means (not shown) is provided for driving some or all of the rollers which guide the belts 10 and 11 whereby the belts are driven in the direction of the arrows shown.
In use, a suspension such as a sewage sludge, for example, is deposited onto the upper surface of the belt 10 adjacent the guide roller 19 by means of a chute or similar distributing devi'ce indicated at 26. As the suspension is conveyed towards the roller 12 liquid can drain therefrom throughthe belt 10 and perforated grid or plate 25. The removal of liquid in this section of the press can be enhanced by subjecting the perforated grid or plate 25 to vibrations by means of a vibrator device indicated at 27.
The partially de-liquified sludge is entrained between the belts 10 and 11 where they t converge at the periphery of the roller 12.
Liquid is expressed from the sludge as it passes around each of the rollers 12 to 18 inclusive due to the fact that it is compressed between the belts. The removal of liquid is enhanced by the shearing action to which the sludge is subjected as it passes around each of the rollers due to the differential in the speed of travel of the two belts at these parts.
214-C.~I . ~ .
1060;~6Z
To facilitate the removal of liquid the rollers 12, 13, 14, 16 and 18 have apertures in their peripheral surfaces. Thus, the rollers 12, 14, 16 and 18 are of hollow construction, the cylindrical shells which form them being provided with a multiplicity of perforations 28 (see Fig.
According to the present invention, a filter press for the removal of the liquid component from a suspension comprises two endless filter belts which in one section of the press are brought together so as to entrain the suspension there-between and which are then guided around a plurality of rollers, characterised in that at least one of said rollers is comprised by a plurality of axially extending circumferentially spaced bars extending between the opposite ends of the rolIer.
The invention will be further apparent from the following description with reference to the several figures of the accompanying drawings which show, by way of example only, in diagrammatic form, one filter press embodying the invention.
Of the drawings;-Fig. 1 shows a side elevation of the press;
. '~
Fig. 2 shows a ragmentary cross-section through the periphery of the perforated rollers of the press of Fig. l;
Fig. 3 shows a side elevation of one of the rollers of the press of Fig. l;
and Fig. 4 shows a cross-section through the roller of Fig. 3 on the line IV-IV
thereof.
Referring now to the drawings, it will be seen that the filter press is essentially comprised by upper and lower endless filter belts 10 and 11 respectively each formed from a woven synthetic filament.
In one section of the press the belts pass in superimposed relationship over a plurality of guide rollers 12 to 18 inclusive. The lower belt 10 is guided towards the roller 12 by a guide roller 19 and away from the roller 18 by guide rollers 20 and 21 for return to the guide roller 19.
The upper belt 11 is guided towards the roller 12 by a guide roller 22 and away from the roller 18 by guide rollers 23 and 24 for return to the guide roller 22.
The filter belt 10 extends horizontally for a substantial distance (of the order of two metres) between the guide roller 19 and the roller 12. The belt 10 is supported between the rollers 19 and 12 on a perforated plate or grid 25 to be referred to in greater detail hereinafter.
The rollers 12, 14, 16 and 18 are arranged with their axes lying in a horizontal plane whilst the rollers 13, 15 and 17 are arranged with their axes lying in a further horizontal plane beneath the plane containing the axes of .
the rollers 12, 14. 16 and 18.
The rollers 13, 15 and 17 are disposed between the rollers 12 and 14, 14 and 16 and 16 and 18 respectively and the spacings between the rollers 12 and 14, 14 and 16 and 16 and 18 are not greater than the diameters of the rollers 13, 15 and 17 respectively, whereby the belts 10 and 11 lap each of the rollers 13 to 17 inclusive by at least 180.
The rollers 20 and 22 are mounted on pivoted arms 40 carrying weights 41 which urge them outwardly in the direction of the arrows X, thus to tension the belts 10 and 11 respectively.
.
Motor means (not shown) is provided for driving some or all of the rollers which guide the belts 10 and 11 whereby the belts are driven in the direction of the arrows shown.
In use, a suspension such as a sewage sludge, for example, is deposited onto the upper surface of the belt 10 adjacent the guide roller 19 by means of a chute or similar distributing devi'ce indicated at 26. As the suspension is conveyed towards the roller 12 liquid can drain therefrom throughthe belt 10 and perforated grid or plate 25. The removal of liquid in this section of the press can be enhanced by subjecting the perforated grid or plate 25 to vibrations by means of a vibrator device indicated at 27.
The partially de-liquified sludge is entrained between the belts 10 and 11 where they t converge at the periphery of the roller 12.
Liquid is expressed from the sludge as it passes around each of the rollers 12 to 18 inclusive due to the fact that it is compressed between the belts. The removal of liquid is enhanced by the shearing action to which the sludge is subjected as it passes around each of the rollers due to the differential in the speed of travel of the two belts at these parts.
214-C.~I . ~ .
1060;~6Z
To facilitate the removal of liquid the rollers 12, 13, 14, 16 and 18 have apertures in their peripheral surfaces. Thus, the rollers 12, 14, 16 and 18 are of hollow construction, the cylindrical shells which form them being provided with a multiplicity of perforations 28 (see Fig.
2) which are countersunk at 29~
The roller 13 is constructed in the form of a squirrel-cage and is comprised by a plurality of rods 30 extending axially in circumferentially spaced relationship between discs 31 and 32 and the two ends of the roller, all as clearly shown in Figs. 3 and 4. This construction permits easy egress of liquid from the sludge through both of the belts lO and ll. This is particularly import~
ant in the early stages of the pressing operation when the sludge contains a high proportion of liquid.
The rollers 15 and 17 are not perforated, since by the time the sludge reaches these rollers it is relatively dry and there would be insufficient water to rise and fill the perforations in the roller and thus reach the interior of the rollers for flow therefrom. It will be understood, however, that liquid expressed at the rolle~s 16 and 18 can drain downwardly through the perforations therein and thus be removed from the sludge permanently.
.
The belts 10 and 11 are separated on the periphery of the roller 18 and the de-liquified sludge is collected by scrapers 33 and 34 for removal by a conveyor belt 35.
The belts 10 and 11 are passed through washing devices 36 and 37 respectively on their return to the roller 12 so that any material trapped within their interstices is removed, thus preventing the belts from becoming permanently blinded.
Trays (not shown in the interests of clarity) are proVided for collecting liquid which drains through the plate or grid 25 and which drains from each of the rollers 12 to 18 inclusive.
It will be appreciated that it is not intended to limit the invention to the above example only, many variations, such as might readily occur to one skilled in the art, being possible without departing from the scope thereof~
as defined by the appended claims.
Thus, for example, ploughs or similar devices may be provided to turn the material as it is conveyed therepast on the section of the belt 10 overlying the plate or grid 25.
214-C~
.
- .
The roller 13 is constructed in the form of a squirrel-cage and is comprised by a plurality of rods 30 extending axially in circumferentially spaced relationship between discs 31 and 32 and the two ends of the roller, all as clearly shown in Figs. 3 and 4. This construction permits easy egress of liquid from the sludge through both of the belts lO and ll. This is particularly import~
ant in the early stages of the pressing operation when the sludge contains a high proportion of liquid.
The rollers 15 and 17 are not perforated, since by the time the sludge reaches these rollers it is relatively dry and there would be insufficient water to rise and fill the perforations in the roller and thus reach the interior of the rollers for flow therefrom. It will be understood, however, that liquid expressed at the rolle~s 16 and 18 can drain downwardly through the perforations therein and thus be removed from the sludge permanently.
.
The belts 10 and 11 are separated on the periphery of the roller 18 and the de-liquified sludge is collected by scrapers 33 and 34 for removal by a conveyor belt 35.
The belts 10 and 11 are passed through washing devices 36 and 37 respectively on their return to the roller 12 so that any material trapped within their interstices is removed, thus preventing the belts from becoming permanently blinded.
Trays (not shown in the interests of clarity) are proVided for collecting liquid which drains through the plate or grid 25 and which drains from each of the rollers 12 to 18 inclusive.
It will be appreciated that it is not intended to limit the invention to the above example only, many variations, such as might readily occur to one skilled in the art, being possible without departing from the scope thereof~
as defined by the appended claims.
Thus, for example, ploughs or similar devices may be provided to turn the material as it is conveyed therepast on the section of the belt 10 overlying the plate or grid 25.
214-C~
.
- .
Claims (16)
1. A filter press for the removal of the liquid component from a suspension comprising two endless filter belts which in one section of the press are brought together so as to entrain the suspension therebetween and which are then guided around a plurality of rollers to follow a generally serpentine path, characterised in that at least one of said rollers is a squirrel-cage type roller comprised by a plurality of axially extending circumferentially spaced bars extending between and secured against rotation with respect to the opposite ends of the roller.
2. A filter press according to claim 1 further characterised in that at least one of the remaining rollers is of hollow construction being formed by a cylindrical shell having perforations therethrough which are counter-sunk at their radially outer ends.
3. A filter press according to claim 1 wherein said endless filter belts lap at least some of said rollers by at least 180°.
4. A filter press according to claim 2 wherein said endless filter belts lap at least some of said rollers by at least 180°.
5. A filter press according to claim 1 wherein one of said filter belts travels horizontally over a perforated deck to receive the suspension before passing over a roller where the suspension becomes entrained between the two belts, characterised in that means is provided for vibrating said perforate deck.
6. A filter press according to claim 2 wherein one of said filter belts travels horizontally over a perforated deck to receive the suspension before passing over a roller where the suspension becomes entrained between the two belts, characterised in that means is provided for vibrating said perforate deck.
7. A filter press according to claim 3 wherein one of said filter belts travels horizontally over a perforated deck to receive the suspension before passing over a roller where the suspension becomes entrained between the two belts, characterised in that means is provided for vibrating said perforate deck.
8. A filter press according to claim 4 wherein one of said filter belts travels horizontally over a perforated deck to receive the suspension before passing over a roller where the suspension becomes entrained between the two belts, characterised in that means is provided for vibrating said perforate deck.
9. A filter press according to claim 5 characterised by the provision of means to turn the suspension whilst it is conveyed on the section of the belt overlying said perforate deck.
10. A filter press according to claim 6 characterised by the provision of means to turn the suspension whilst it is conveyed on the section of the belt overlying said perforate deck.
11. A filter press according to claim 7 characterised by the provision of means to turn the suspension whilst it is conveyed on the section of the belt overlying said perforate deck.
12. A filter press according to claim 8 characterised by the provision of means to turn the suspension whilst it is conveyed on the section of the belt overlying said perforate deck.
13. A filter press according to Claim 1, 2 or 3 wherein one of the first rollers around which the endless filter belts extend when travelling along said serpentine path is of the squirrel-cage type.
14. A filter press according to Claim 4, 5 or 6 wherein one of the first rollers around which the endless filter belts extend when travelling along said serpentine path is of the squirrel-cage type.
15. A filter press according to Claim 7, 8 or 9 wherein one of the first rollers around which the endless filter belts extend when travelling along said serpentine path is of the squirrel-cage type.
16. A filter press according to Claim 10, 11 or 12 wherein one of the first rollers around which the endless filter belts extend when travelling along said serpentine path is of the squirrel-cage type.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB18321/76A GB1519234A (en) | 1976-05-05 | 1976-05-05 | Filter presses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060262A true CA1060262A (en) | 1979-08-14 |
Family
ID=10110481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,750A Expired CA1060262A (en) | 1976-05-05 | 1977-04-22 | Filter presses |
Country Status (19)
| Country | Link |
|---|---|
| JP (2) | JPS52134173A (en) |
| AU (1) | AU504738B2 (en) |
| BE (1) | BE853972A (en) |
| BR (1) | BR7702717A (en) |
| CA (1) | CA1060262A (en) |
| DE (1) | DE2717971C3 (en) |
| DK (1) | DK195477A (en) |
| ES (1) | ES458364A1 (en) |
| FR (1) | FR2350129A1 (en) |
| GB (1) | GB1519234A (en) |
| GR (1) | GR59190B (en) |
| IT (1) | IT1084481B (en) |
| LU (1) | LU77219A1 (en) |
| NL (1) | NL7704538A (en) |
| NO (1) | NO771549L (en) |
| NZ (1) | NZ183943A (en) |
| PT (1) | PT66512B (en) |
| SE (1) | SE7704952L (en) |
| ZA (1) | ZA772387B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4909851A (en) * | 1982-07-31 | 1990-03-20 | Ciba-Geigy Corporation | Pigment compositions |
| CN110779314A (en) * | 2019-11-12 | 2020-02-11 | 山西河坡发电有限责任公司 | Roller type drying structure and dryer composed of same |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5485547A (en) * | 1977-12-20 | 1979-07-07 | Ishigaki Mech Ind | Method of and device for dehydrating muddy article |
| AT376958B (en) * | 1981-11-03 | 1985-01-25 | Voest Alpine Ag | SCREEN PRESS FOR SUBSTANCE DRAINAGE |
| AT381238B (en) * | 1982-04-01 | 1986-09-10 | Voest Alpine Ag | SCREEN PRESS |
| DE3221435C2 (en) * | 1982-06-07 | 1985-10-31 | Hitachi Plant Engineering & Construction Co., Ltd., Tokio/Tokyo | Belt filter press for dewatering thickened sewage sludge |
| AT386819B (en) * | 1983-04-22 | 1988-10-25 | Voest Alpine Ag | PRE-DRAINAGE DEVICE FOR SLUDGE |
| KR870001736B1 (en) * | 1983-12-01 | 1987-09-26 | 니홍 고강 가부시기 가이샤 | Dehydration method of sludge |
| DE3400469C2 (en) * | 1984-01-09 | 1987-04-16 | Vladimir Dmitrievič Šikovskij | Belt filter press |
| SE8505124L (en) * | 1984-11-07 | 1986-05-08 | Green Bay Packaging Inc | SET AND DEVICE FOR TREATING A SLIDE |
| FR2735988A1 (en) * | 1995-06-27 | 1997-01-03 | Charbonnier Jean | Filtration of a suspension between two filter belts moving together |
| CN108176125A (en) * | 2017-11-27 | 2018-06-19 | 江苏力禾颜料有限公司 | A kind of band filter and filter method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2365658A (en) * | 1939-06-20 | 1944-12-19 | American Voith Contact Co Inc | Apparatus for the removal of water, liquors, or other liquids from soaked masses of fibrous materials |
| DE1007709B (en) * | 1953-12-22 | 1957-05-02 | Heinrich Dorfeld | Device, especially for pressing leached diffusion chips |
| NL100150C (en) * | 1955-12-30 | |||
| FR2138351A1 (en) * | 1971-05-24 | 1973-01-05 | Bahr Albert | Drum filter press for dewatering |
| JPS5013717B2 (en) * | 1971-09-07 | 1975-05-22 | ||
| SE363056B (en) * | 1972-05-05 | 1974-01-07 | Nordstjernan Rederi Ab | |
| DE2343324A1 (en) * | 1973-08-28 | 1975-03-20 | Albert Baehr | FILTER PRESS, IN PARTICULAR FOR DEWATERING OF SLUDGE IN WASTE WATER PURIFICATION PLANTS |
-
1976
- 1976-05-05 GB GB18321/76A patent/GB1519234A/en not_active Expired
-
1977
- 1977-04-20 ZA ZA00772387A patent/ZA772387B/en unknown
- 1977-04-21 DE DE2717971A patent/DE2717971C3/en not_active Expired
- 1977-04-22 CA CA276,750A patent/CA1060262A/en not_active Expired
- 1977-04-22 GR GR53271A patent/GR59190B/en unknown
- 1977-04-26 BE BE177033A patent/BE853972A/en unknown
- 1977-04-26 IT IT22814/77A patent/IT1084481B/en active
- 1977-04-26 NL NL7704538A patent/NL7704538A/en not_active Application Discontinuation
- 1977-04-27 FR FR7712782A patent/FR2350129A1/en not_active Withdrawn
- 1977-04-27 NZ NZ183943A patent/NZ183943A/en unknown
- 1977-04-28 LU LU77219A patent/LU77219A1/xx unknown
- 1977-04-28 SE SE7704952A patent/SE7704952L/en unknown
- 1977-04-28 BR BR7702717A patent/BR7702717A/en unknown
- 1977-04-29 AU AU24715/77A patent/AU504738B2/en not_active Expired
- 1977-05-02 JP JP5115077A patent/JPS52134173A/en active Pending
- 1977-05-02 ES ES458364A patent/ES458364A1/en not_active Expired
- 1977-05-03 NO NO771549A patent/NO771549L/en unknown
- 1977-05-04 DK DK195477A patent/DK195477A/en not_active Application Discontinuation
- 1977-05-04 PT PT66512A patent/PT66512B/en unknown
-
1981
- 1981-11-24 JP JP1981175303U patent/JPS57115609U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4909851A (en) * | 1982-07-31 | 1990-03-20 | Ciba-Geigy Corporation | Pigment compositions |
| CN110779314A (en) * | 2019-11-12 | 2020-02-11 | 山西河坡发电有限责任公司 | Roller type drying structure and dryer composed of same |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7704538A (en) | 1977-11-08 |
| JPS57115609U (en) | 1982-07-17 |
| AU2471577A (en) | 1978-11-02 |
| ZA772387B (en) | 1978-03-29 |
| DK195477A (en) | 1977-11-06 |
| JPS52134173A (en) | 1977-11-10 |
| LU77219A1 (en) | 1977-08-18 |
| PT66512A (en) | 1977-06-01 |
| GR59190B (en) | 1977-11-25 |
| BE853972A (en) | 1977-08-16 |
| DE2717971C3 (en) | 1981-10-22 |
| FR2350129A1 (en) | 1977-12-02 |
| SE7704952L (en) | 1977-11-06 |
| DE2717971A1 (en) | 1977-11-17 |
| NO771549L (en) | 1977-11-08 |
| ES458364A1 (en) | 1978-02-16 |
| AU504738B2 (en) | 1979-10-25 |
| NZ183943A (en) | 1979-10-25 |
| PT66512B (en) | 1978-10-16 |
| IT1084481B (en) | 1985-05-25 |
| BR7702717A (en) | 1978-03-28 |
| DE2717971B2 (en) | 1981-03-12 |
| GB1519234A (en) | 1978-07-26 |
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