DE886592C - Method and device for increasing the dry content in the filter cake on rotary filters - Google Patents
Method and device for increasing the dry content in the filter cake on rotary filtersInfo
- Publication number
- DE886592C DE886592C DEW2755D DEW0002755D DE886592C DE 886592 C DE886592 C DE 886592C DE W2755 D DEW2755 D DE W2755D DE W0002755 D DEW0002755 D DE W0002755D DE 886592 C DE886592 C DE 886592C
- Authority
- DE
- Germany
- Prior art keywords
- filter cake
- increasing
- dry content
- rotary filters
- cake
- 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
- 239000012065 filter cake Substances 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims 2
- 238000010009 beating Methods 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/20—Vibrating the filters
-
- 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
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Solid Materials (AREA)
Description
Es ist bekannt, den Trockengehalt im Filterkuchen auf Drebfiltern dadurch zu erhöhen, daß man den Filterkuchen während seiner Entwässerung auf dem Filtermedium durch Pressen oder Schlagen gleichzeitig ver. dichtet Das Verdichten hat eine dichtere Lagerung der Körnchen im Filterkuchen zur Folge, wodurch die in den Poren des Kuchens befindliche Flüssigkeit herausgedrängt wird. It is known that the dry content in the filter cake on Dreb filters by increasing the fact that the filter cake during its dewatering on the The filter medium is compressed by pressing or beating at the same time. The compression results in a denser storage of the granules in the filter cake, whereby the in Liquid located in the pores of the cake is forced out.
Das Pressen des Filterkuchens wird mittels Preßwalzen durchgeführt, die unter Druck auf dem Filterkuchen abrollen. Der Mantel der Preßwalzen kann in der Längsrichtung unterteilt sein und eine harte oder weiche Oberfläche aufweisen. Das Schlagen des Filterkuchens geschieht mittels biegsamer Schläger, die radial auf einersumlaufenden Achse sitzen. Die Schläger treffen mit ihrer Drehgeschwindigkeit auf den Filterkuchen auf und gleiten über denselben hinweg. Bei klebendem Filterkuchen werden hierbei jedoch leicht Teile des I(uchens mitgerissen und fortgeschleudert. The pressing of the filter cake is carried out by means of press rollers, which roll under pressure on the filter cake. The jacket of the press rolls can be in be divided in the longitudinal direction and have a hard or soft surface. The beating of the filter cake is done by means of flexible beaters, which are radial sit on a rotating axis. The clubs hit at their speed of rotation onto the filter cake and slide over the same. If the filter cake is sticky However, parts of the I (uchens are easily carried along and thrown away.
Das Verdichten des Filterkuchens durch Schlagen ist erfahrungsgemäß wirksamer als durch Pressen mittels Preßwalzen. Eine wesentliche Verbesserung des Verdichtens durch Schlagen ist erzielbar,-wennder Filterkuchen erfindungsgemäß durch viele Einzelschläger derart geschlagen wird, daß eine Verschiebung der Körnchen nicht nur in der Schlagrichtung, sondern auch seitlich dazu erfolgt. Die Schläger können an der auf den Filterkuchen auftreffenden Oberfläche keilartig ausgebildet sein, um die Schlagwirkung zu erhöhen. Die Vielzahl der Schläger macht die Schlagwirkung von der Stärke und Unebenheit des des Filterkuchens weitgehend unabhängig. Experience has shown that the filter cake is compacted by beating more effective than by pressing by means of press rollers. A major improvement on the Compaction by beating is achievable if the filter cake is achieved according to the invention many individual clubs are hit in such a way that a displacement of the grains takes place not only in the direction of impact, but also to the side. The thugs can be designed like a wedge on the surface that hits the filter cake be to increase the impact. The variety of clubs makes the impact largely independent of the thickness and unevenness of the filter cake.
Eine beispielsweise Ausführung zu vorstehendem Verfahren zeigt Abb. I im Querschnitt und Abb. 2 im Längsschnitt. h ist die Filtertrommel, I sind die Filterzellen, m die Saugrohre von den Zellen zum Steuerkopf, i der Träger des Filtermediums, k das Filtermedium, g der Filterkuchen, b ist eine an den Enden in Zapfen c gelagerte Achse, an der die Schläger a befestigt sind. Diese Schläger bestehen beispielsweise aus Rundgummi oder Flachgummi mit gerippter Oberfläche an der Schlagseite. 1Es können auch andere elastische Schläger verwendet werden, z. B. gewundene Federn, die an den Enden noch beschwert sein können. Die Achse wird um einen bestimmten Winkel in drehbar schwingende Bewegung versetzt. Das erfolgt z. B. durch einen Hebel d mittels Hubstange e von der Exzenterwellef. Die Drehzahl der Welle, der Ausschlagwinkel a des Hebels d und die Masse der Schläger 0 stehen in einem bestimmten Verhältnis. Die Schlagwirkung mehrerer hintereinandergeschalteter Vorrichtungen kann gleichzeitig durch Änderung der Drehzahl der Welle f oder durch Änderung der Exzentrizität erfolgen. Die Änderung der Schlagkraft der Schläger einer Achse'kann durch Anderung des Ausschlagwinkels durch Änderung der Länge des Hebels d erfolgen. Die Möglichkeit der wanderung ist deshalb notwendig, weil der anfangs noch weiche Kuchen nur einen weichen Schlag verträgt, während der Schlag verstärkt werden muß, je trockener und fester der Kuchen wird. An example of an implementation of the above method is shown in Fig. I in cross section and Fig. 2 in longitudinal section. h is the filter drum, I are the Filter cells, m the suction pipes from the cells to the control head, i the carrier of the filter medium, k is the filter medium, g is the filter cake, b is one supported at the ends in pegs c Axis on which the clubs a are attached. These clubs exist, for example Made of round rubber or flat rubber with a ribbed surface on the list side. 1It can other elastic rackets can also be used, e.g. B. coiled springs attached to the ends can still be weighed down. The axis is at a certain angle set in rotatable swinging motion. This is done z. B. by a lever d by means of the lifting rod e from the eccentric shaft f. The speed of the shaft, the deflection angle a of the lever d and the mass of the club 0 are in a certain relationship. The impact of several devices connected in series can simultaneously by changing the speed of the shaft f or by changing the eccentricity. The change in the impact force of the clubs on an axis can be achieved by changing the deflection angle done by changing the length of lever d. The possibility of hiking is there Necessary because the cake, which is initially soft, is just a soft whack tolerates, while the blow must be reinforced, the drier and firmer the cake will.
Bei den bisher bekannten Einrichtungen konnte der Filterkuchen, z. B. bestehend aus Calciumcarbonat, Braunkohle, Stärke und ähnlichem Gut, zwar bröckelig vom Filter abgenommen werden. Er wurde aber beim Transport wieder schlammartig, so daß das Gut nicht gestapelt oder verschickt werden konnte, es sei denn, daß durch eine besondere Einrichtung getrocknet wurde. In the previously known devices, the filter cake, for. B. consisting of calcium carbonate, lignite, starch and similar goods, although crumbly removed from the filter. But it got muddy again during transport, so that the goods could not be stacked or shipped unless through a special facility was dried.
Bei dem Verfahren mit der beispielsweise skizzierten Vorrichtung wird dieser Filterkuchen um einige Prozente trockener und bleibt bröckelig. So -kann z. B. Braunkohle, die aus der Trübe gefiltert in großen Mengen anfällt, in bröckeliger Form gleichmäßig verteilt der Bunkerkohle beigemischt und somit verwertet werden. In the method with the device outlined, for example this filter cake becomes a few percent drier and remains crumbly. So can z. B. Lignite, which is filtered out of the turbidity and accumulates in large quantities, in more crumbly Form, evenly distributed, can be added to the bunker coal and thus recycled.
Vorstehendes Verfahren ist für Drehfilter aller Art verwendbar. The above method can be used for all types of rotary filters.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW2755D DE886592C (en) | 1938-07-24 | 1938-07-24 | Method and device for increasing the dry content in the filter cake on rotary filters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW2755D DE886592C (en) | 1938-07-24 | 1938-07-24 | Method and device for increasing the dry content in the filter cake on rotary filters |
Publications (1)
Publication Number | Publication Date |
---|---|
DE886592C true DE886592C (en) | 1953-08-17 |
Family
ID=7591741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEW2755D Expired DE886592C (en) | 1938-07-24 | 1938-07-24 | Method and device for increasing the dry content in the filter cake on rotary filters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE886592C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1016239B (en) * | 1952-03-21 | 1957-09-26 | Boerje Sune Nyquist | Method and device for dewatering suspensions |
DE1028091B (en) * | 1956-04-20 | 1958-04-17 | Krauss Maffei Imp G M B H & Co | Method and device for treating the filter cake located on rotary filters |
DE1094720B (en) * | 1954-03-10 | 1960-12-15 | Columbia Southern Chem Corp | Process for removing water from a mixture of water with finely divided, precipitated amorphous silica |
DE1143790B (en) * | 1958-02-06 | 1963-02-21 | Dorr Oliver Inc | Method and device for separating and drying solid particles from liquid suspensions and slurries |
DE1177614B (en) * | 1955-09-12 | 1964-09-10 | Hans Jung | Closed cylindrical rotary pressure filter |
-
1938
- 1938-07-24 DE DEW2755D patent/DE886592C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1016239B (en) * | 1952-03-21 | 1957-09-26 | Boerje Sune Nyquist | Method and device for dewatering suspensions |
DE1094720B (en) * | 1954-03-10 | 1960-12-15 | Columbia Southern Chem Corp | Process for removing water from a mixture of water with finely divided, precipitated amorphous silica |
DE1177614B (en) * | 1955-09-12 | 1964-09-10 | Hans Jung | Closed cylindrical rotary pressure filter |
DE1028091B (en) * | 1956-04-20 | 1958-04-17 | Krauss Maffei Imp G M B H & Co | Method and device for treating the filter cake located on rotary filters |
DE1143790B (en) * | 1958-02-06 | 1963-02-21 | Dorr Oliver Inc | Method and device for separating and drying solid particles from liquid suspensions and slurries |
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