WO2017108234A1

WO2017108234A1 - Multi-cell filter device and method by which a suspension to be filtered is fed to a multi-cell filter device

Info

Publication number: WO2017108234A1
Application number: PCT/EP2016/075630
Authority: WO
Inventors: Wolfgang Knobloch
Original assignee: Andritz Kmpt Gmbh
Priority date: 2015-12-23
Filing date: 2016-10-25
Publication date: 2017-06-29
Also published as: DE102015122809A1

Abstract

A multi-cell filter device can have: a filter drum (1), which has a horizontally extending longitudinal axis and which is rotatable about its longitudinal axis and defines a jacket surface (3); a plurality of filter cells (5) which are formed on the outside of the jacket surface (3) and which are each open radially to the outside and are distributed about the circumference of the filter drum (1) and are arranged alongside one another in the circumferential direction of the filter drum and which are separated from one another by means of respective radial filter cell walls (7) which are arranged at angular intervals from each other corresponding to a circumference width of the filter cells (5); and a suspension feeder device (41) by which a suspension (33) to be filtered is fed to the filter drum (1), wherein the suspension feeder device (41) has a suspension input area with at least one suspension input opening (45-1, 45-2) through which the suspension (33) to be filtered is input into the filter cells (5), wherein the suspension input area (S) is arranged over the filter drum (1) such that, during the rotary operation of the filter drum (1), the suspension (33) to be filtered can be inserted from the at least one suspension input opening (45-1, 45-2) from above into the radially outwardly open filter cells (5).

Description

A multi-cell filter device and method for delivering a suspension to be filtered to a multi-cell filter device

The invention relates to a multi-cell filter device for the filtration of a suspension and to a method for feeding a suspension to be filtered to a

Multizellenflltervorrichtung.

Mutticle filter devices are used e.g. used in chemical, pharmaceutical and biological applications on an industrial scale for the filtration of suspensions. Conventional Muitizellenfiltervorrichtungen have for this purpose a rotatable filter drum which rotates about its horizontal longitudinal axis, and a housing in which the filter drum is accommodated. On the lateral surface of the filter drum a plurality of filter cells are arranged, which are connected to the interior of the filter drum via a filter medium, e.g. a filter cloth, are connected. In the interior of the filter drum, the filter cells are connected to associated outlet lines, which with the

Outside of the housing communicate. There is usually a pressure difference across the individual filter cells, during which a filtration is carried out in the filter cells. For filtration, a suspension is fed to the filter cells from outside the filter drum, which suspension is received by the filter cells and emits a filtrate through the filter medium to the outlet lines while a

Fitter cake remains in the filter cells. By turning the filter drum, the filter cells can be moved through different areas of the housing, in which the suspension is filtered and the filter cake is washed, dried and dispensed.

Usually, the filter drum for feeding the suspension with a lower portion thereof is immersed in a slurry trough so that a plurality of each

Filter lines simultaneously absorb the suspension. Such a filter device is e.g. from EP 2 520 348 A1.

It is also customary for the filter drum to pass in sections through a sealed suspension feed space within the housing, in which case a plurality of filter cells at the same time receive the suspension. Such

Drehfilteraniage is known for example from DE 100 05 796 AI. Consequently, in the conventional type multi-slice filter devices, the

Suspension simultaneously taken from several filter cells from a suspension reservoir (suspension trough or suspension feed space). However, the suspension resides in this suspension reservoir under undefined conditions until it is taken up by the filter cells, i.e., e.g. the suspension may be distributed inhomogeneously and / or may linger in the suspension reservoir for different lengths of time. This is disadvantageous in that it is unclear when, how much and in which state the suspension is absorbed by the filter times. A multi-cell filter device and a method for feeding a suspension to be filtered to a multi-cell filter device are provided which make it possible to supply a suspension to be filtered to a respective filter cell in a defined manner to a filter drum. There will be a centrifugal filter device according to claim 1 and a method for. Supplying a suspension to be filtered to a multi-cell filter device according to claim 9 provided. Further embodiments of the device and the

Methods are described in the dependent claims. A multi-cell filter device according to an exemplary embodiment is used, for example, to prepare a suspension to be filtered, e.g. a

Liquid is with solid contained therein, e.g. Color pigments and / or a medical solid product to separate into a filtrate and a filter cake. Here, e.g. the filter cake is further treated (e.g., washed and / or dried) in the millette if necessary and, finally, from

Multicell filter device are issued, whereas the filtrate after filtration, e.g. is output directly from the multi-cell filter device.

The multi-cell filter device may include a filter drum, a plurality of filter cells, and a suspension feeder for supplying a filter to be filtered

Have suspension to the filter drum. The filter drum may have a longitudinal axis, e.g. extends at least substantially horizontally, can be rotatable about its longitudinal axis (for example, by an electric motor) and can

Define lateral surface. The filter drum can be supported in a housing, which encloses the filter drum, for example, at least substantially on all sides. The plurality of filter cells (eg 2, 3, 4, 5, 6, 7, 8, 9, 10, 10-20, 20-30, 30-40, 40-50 or more than 50) can be formed on the outside of the lateral surface and in each case be radially outwardly open and distributed over the circumference of the filter drum and be arranged side by side in the circumferential direction of the filter drum. For example, the filter cells can also be arranged alongside one another along the longitudinal axis of the filter drum. The filter cells can be separated from one another by means of respective radial filter cell walls (in the circumferential direction), which are arranged in angular intervals corresponding to a circumferential width of the filter cells. In addition, for example, each filter cell having an associated inner pipe (eg, a pipeline), which runs in the interior of the filter drum and connects the lateral surface facing side of the filter cell with the outside of the multi-cell filter device. The inner lines can serve, for example, the Fittrat from the

Derive filter cells, and / or apply a pressure difference across the filter cells away.

The suspension supply means may include a suspension input section having at least one suspension input port (e.g., an input valve, an opening of a slurry supply pipe, etc.) for supplying and feeding the suspension to be filtered into the filter times, the suspension input section (in FIG

Vertical) is placed over the filter drum. The suspension to be filtered may be used during a rotary operation, e.g. during a continuous or interrupted, e.g. clocked-interrupted, rotary operation, for example during, e.g. exclusively during, stylistand periods and / or the

Turning periods, the filter drum are input from the at least one suspension input opening at least substantially from above into the radially outwardly open filter cells, e.g. flow into the filter cells at least substantially exclusively under the action of gravity. For example, it is also possible for the suspension to be pressurized (eg, over-pressurized relative to the environment of the filter drum) prior to passing through the suspension input port so as to impart a resultant pulse as it passes through the suspension input port. Thus, the (respective)

Suspension input port e.g. be arranged laterally above and / or vertically above the Filtert drum and the suspension of the

Suspension input opening (eg horizontal or vertical or against the vertical inclined) emerge (eg squirt out). When the outlet is horizontal, for example, the suspension can enter the filter cells at least essentially from above, for example by gravity, at least partially following a parabolic trajectory because of gravity.

The suspension input region may be an unsealed closed region, e.g. an area in the housing in which the filter drum is received, which e.g. is open to the atmosphere / environment. In the suspension input area is e.g. no enclosed chamber which spans a plurality of adjacent filter cells and in which a suspension volume which extends beyond an absorption volume of the filter cells present in the suspension input region can be acted upon (or can be acted upon) by a fluid pressure deviating from the ambient pressure of the filter drum. That is, by means of the suspension input region, the suspension is introduced into the filter cells e.g. without additional pressure (for example, without a hydrostatic suspension pressure or without an additional pressure in addition to the atmospheric pressure / ambient pressure) can be fed, for example at least substantially only by gravity into individual filter cells. The latter means that by means of the suspension input region the suspension in the filter cells can only be charged without additional pressure, i. it is only possible to be supplied or supplied without deviating (for example higher) pressure from the (completely) other (or outside of the suspension input area) surrounding the filter drum (for example in the space between the filter drum and the housing).

Further, the suspension input area in the circumferential direction of the filter drum may be defined by a suspension input angular range of the filter drum which, based on 0 ° and 380 ° as an upper apex of the filter drum, is at least substantially from 300 ° to 30 °, optionally at least substantially 345 ° to 15 ° and further optionally at least substantially extends from 350 ° to 10 °. In this case, the top vertex of the filter drum may correspond to the area of the filter drum in which it has the largest gravitational potential.

Accordingly, the suspension is over a wide peripheral range of

The filter drum can be introduced from above into the filter cells without the suspension being able to flow over the radial filter cell walls into adjacent filter cells. The suspension feeder may include a plurality of suspension input ports located in the suspension input region along the longitudinal axis of the

Filtering drum are arranged (for example, such that the filter cells in the longitudinal direction are completely fillable with suspension) and / or in the circumferential direction of the

Filter drum with angular intervals corresponding to the angular distances of the radial

Filter cell walls correspond, are spaced from each other. The suspension input ports may be fixed in the suspension input area relative to the housing. In this way, the filter cells, e.g. individually, be filled with suspension under different conditions. For example, a suspension input port, e.g. a first in the sense of rotation of the filter drum

Suspension input port, prefilling a filter cell, e.g. with a low fill rate, and may be followed by another / in filter drum rotation direction

Suspension input port, completely fill the prefilled filter cell, e.g. with a high filling rate. For example, the rotation of the filter drum may be interrupted during the entering of the suspension; the filter drum can e.g. be rotated clocked. It is e.g. also possible, by means of one of

Suspension input ports to input one type of suspension and another type of suspension into the feiter cells by means of another suspension input port, i.e., it is possible during ongoing operation of the multi-cell filter device, e.g. To enter different types of suspension in a filter tents and / or to enter different suspensions in different filter cells.

The multi-cell filter device may further include a washing liquid supply means for supplying a washing liquid (for example, for washing the suspension or the suspension)

Filter cake) on the filter drum. The washing liquid supply means may include a washing liquid input portion having at least one

A washing liquid input port (e.g., a washing nozzle or a shower head) for introducing the washing liquid into the filter cells. Of the

Washing liquid input area can be arranged above and / or laterally next to the filter drum and in the direction of rotation of the filter drum the

Suspension input area (e.g., directly). Thus, during the rotary operation of the filter drum (e.g., during, for example, during, only) the washing liquid is rotating

Stiilstandperioden and / or the periods of rotation of the filter drum) of the at least a Waschflüssigkeitseingabeöffnung from above and / or from one side of the Fittertrommel ago in the radially outwardly open Fiiterzellen entered.

The washing liquid input portion of the washing liquid supply means may be replaced in the circumferential direction of the filter drum by a

Washing liquid input angle range of the filter drum to be defined that, based on 0 ° and 360 ° as the upper apex of the filter drum according to, at least substantially from 0 ° to 75 ° _"optionally at least substantially from 15 ° to 60 °, more optionally at least substantially extending from 30 ° to 45 °. In this way, the washing liquid over a wide circumferential direction range in the

Fiter cells can be supplied without that they can flow over the radial filter cell walls away into adjacent filter cells.

The washing liquid supply device may have several

Have Waschflüssigkeitseingabeöffnungen, which in

Washing liquid input area along the longitudinal axis of the filter drum are arranged and / or in the circumferential direction of the filter drum with angular intervals, e.g. correspond to the angular distances of the radial filter cell walls, are spaced from each other. In this way, the filter cake in the individual

Filter cells are washed separately and / or several times, e.g. with one type of washing liquid, which is input through a washing liquid input port, and with another type of washing liquid, which is another one

Washing liquid input opening {the washing liquid input openings) is input.

The washing liquid input region may be an unsealed closed region (e.g., analogous to the slurry input region), such that in FIG

Was washing liquid input area no closed chamber is present, which spans a plurality of adjacent filter cells and in which a washing liquid volume, which is above a receiving volume of the present in the Waschflüssigkeitseingebereich

Filter cell goes out, with one of the ambient pressure of the filter drum

deviant liquid sd juck can be acted upon. For example, the

Washing fluid input area not separate from / opposite to

Sealed suspension input area. In a method for supplying a suspension to be filtered to the above-described multi-zone filter apparatus according to an exemplary embodiment, in the course of the rotating operation of the filter drum, the

Filter cells e.g. at least essentially vertically below the

Suspension input opening of the suspension feeder are moved past and the suspension at least substantially only by gravity from above into the filter cells are entered into. That is, the suspension can flow in the direction of gravity into the (e.g., vertically) underlying filter cell. Further, in the process, e.g. each entering the suspension into the filter cell are interrupted before a new filter cell is moved under the suspension input opening. Thus, the suspension may be e.g. exactly one filter cell are supplied.

In addition, in the method, e.g. Entering the suspension into the filter tents without filter cell cross-over, deviating from the ambient pressure of the filter drum fluid pressure. That is, the suspension may be e.g. at least in the

Essentially depressurized in the filter cells are entered.

In addition, in the process, for example, the rotation of the filter drum may be interrupted when starting the suspension into eg a single filter cell, and the rotation of the filter drum may be restarted when the input of the suspension is terminated. That is, the filter drum can be synchronized / clocked corresponding to the suspension input, for example. The multi-layer filter device may further comprise a drying section for drying the suspension or filter cake accommodated in the filter cells, optionally having a drying device with at least one drying gas inlet opening for supplying a drying gas (eg air, steam, nitrogen, etc.) to the filter cells is provided. The drying area can be arranged below and / or next to the filter drum, so that the drying gas during the rotary operation or the continuous or cycled rotation of the filter drum from the at least one drying gas inlet opening from below and / or from the side to the radially outwardly open Filter cells can be routed. The drying area is, for example, provided substantially at the bottom (relative to the vertical) on the filter drum and may be defined in the circumferential direction of the filter drum by a drying angle range corresponding to at least 0 ° and 360 ° as an upper apex of the filter drum Substantially extends from 0 ° to 270 ', at least substantially from 75 ° to 270 ° and optionally at least substantially from 90 ° to 255 °. Likewise, a plurality of drying gas inlet openings may be provided in the drying area, which in the

Drying area along the longitudinal axis of the filter drum are arranged and / or in the circumferential direction of the filter drum with angular intervals, the to the

Angular distances of the radial filter cell walls correspond to each other in the

Distance are arranged. Thus it is e.g. it is possible to perform various drying operations (e.g., with steam, air, etc.) through the drying gas inlet ports.

For example, are all areas, i. the suspension input area, the

Washing liquid input area, the drying area and (from the drying area) in the circumferential direction of the drum further a range to the

Suspension input area within the housing, e.g. directly adjacent to each other without additional sealing areas interconnected; that is, they are in fluid communication. That is, in the space between the fitter drum and the housing, the suspension input area, the

Washing liquid input area, the drying area and in the circumferential direction of the filter drum on / the area to the suspension input area in

Fluid communication (with each other) are located and without additional sealing areas adjacent to each other.

Weather, the Muttizellenfiltervorrichtung may have a control device, wherein the control device may be connected to a level sensor and / or a sensor for detecting a cake height. The level sensor and / or sensor may be arranged on the Fiftertrommel to detect a suspension level or the cake height in the filter cells. The control device may e.g. depending on the detected suspension level or of the detected cake height in the filter cells, a rotational speed of the filter drum, a pressure difference with which the filter cells can be acted upon, a suspension output quantity, a

Controlling wash liquid output and / or drying gas output In addition, the multi-cell filter device may include a pressure differential generating means _"which is set so that via at least one of the filter cells across a pressure difference is generated. The pressure difference acts, for example, such that a higher pressure predominates on the side of the filter cell which is open towards the outside than on the side of the filter cell facing the jacket surface, for example, if the filter cell moves through the rotation of the filter drum in the suspension input region, in the

Washer input area and / or located in the drying area. From the pressure difference generating means is e.g. a negative pressure can be generated, which e.g. over (at least one) of the inner conduits acts on at least one of the filter cells so that e.g. a vacuum or vacuum filtration is possible. In addition, the pressure difference generation means may be designed such that e.g. in the housing relative to the environment (the ambient or atmospheric pressure), an overpressure can be generated, for. to allow overpressure filtration. For example, the pressure differential (e.g., exclusively) acts upon entering the suspension into the filter cell (s) and / or (e.g., only) after stopping the suspension from entering the filter cell (s), e.g. controlled by the control device to carry out and / or assist the filtration of the suspension. This can also apply analogously for the filtration or washing of the filter cake by means of the washing liquid. In addition, e.g. the pressure difference is controlled so that a force (e.g., a compressive force) results on the filter cake to hold the filter cake in the filter cells when the filter cells are at the bottom of the filter drum. Furthermore, the filter cells of the multi-cell fitter device can be connected to their

Longitudinal / axial ends (with respect to the longitudinal direction of the filter drum) to be bounded by End- Ftlterzellenwände which are connected to the radial filter cell walls to limit the filter cells filter drum circumference and end. That is, the filter cells may be surrounded by a peripheral boundary wall. The filter cells can pass through the filter cell walls in the longitudinal and / or cross section of the filter drum, e.g. radially outwardly widened, e.g. at least in the

Be formed substantially trapezoidal, wherein the base side of

Trapezoidal cross section is the open side of the filter cell to the outside. In addition, a ratio of a filter cell width in the circumferential direction of the filter drum, for example, the length of the base side of the trapezoidal cross-section, to a filter cell height in the Radial direction of the filter drum, for example, a radial filter cell wall height, be about 0.5 to 8. For example, the previously described types of design may cause a more uniform filtration to take place throughout the filter cell and a holding force on the filter cake may be increased due to the pressure differential.

Further, in the process, the suspension may be filtered by a static pressure of the suspension (eg, a suspension liquid pressure) in the filter cells (eg, exclusively) while the suspension is being introduced into the filter cells and / or after the inputting of the suspension into the filter cells , In addition, the pressure difference (e.g., due to vacuum filtration or the

Overpressure filtration), for example, controlled by the control device, support the filtration of the suspension and / or the filter cake.

Embodiments of the invention are shown in FIGS

Explained in more detail below.

a schematic front view (front view) of a filter drum of a multi-cell filter device according to an embodiment, a sectional view taken along the line A-A of Figure 1, wherein the filter drum is shown cut longitudinally, a schematic front view (front view) of a

Multi-cell filter device according to an embodiment, and a schematic front view (front view) of a

Multi-cell filter device according to an embodiment, in which various work areas are designated.

Figures 1 and 2 show a schematic front view of a filter drum of a multi-cell device and a sectional view along the line AA of Figure 1 according to an exemplary embodiment. The filter drum 1 is a cylinder body with a longitudinal axis A, which extends horizontally, with two end faces and a lateral surface 3. The filter drum 1 is about the longitudinal axis A, for example in a clockwise direction (see arrow DS in Figure 1), rotatable (eg an electric motor, not shown). The outer periphery of the filter drum 1 is defined by the lateral surface 3, which is formed from a filter material, such as a filter cloth 4. Outside the filter drum 1 on the lateral surface 3, a plurality of filter cells 5 is formed, in this case, for example, twenty filter cells. Each individual filter cell 5 is open radially outward. The twenty filter tents are distributed over the circumference of the filter drum 1, and arranged in the circumferential direction of the filter drum 1 side by side and are separated by respective radial Fitterzellenwände 7 in the circumferential direction. Here are the angular distances of the radial filter cell walls 7 in the circumferential direction, for example, each about 18 ° such that it corresponds to a width of each of the filter cells 5. Since the filter cells 5 extend over the entire length of the filter drum 1, the filter drum 1 is provided in total with twenty filter tents. However, it is also possible, for example, for the filter cells 5 to extend, for example, approximately over half the length or one third of the length of the filter drum 1, the filter drum 1 then being provided, for example, with forty or sixty filter tents which extend in the longitudinal direction and are arranged side by side in the circumferential direction. The filter cells 5 are bounded at their longitudinal ends by end filter cell walls 9 (see FIG. 2), which are connected to the radial

Fitter cell walls 7 are connected to the filter cells 5 filtertrommelumfangs- and limit end. The filter cells 5 are formed by the filter cell walls 7 and 9 in the longitudinal and / or cross section of the filter drum 1, for example, at least substantially trapezoidal, wherein a base side of the trapezoidal cross-section forms the outwardly open side or outside 5-1 of the filter cell 5 and the Tip side of the trapezoidal cross section forms the closed side or inner side 5-2 of the filter line 5 located on the lateral surface 3. Consequently, an area of the outer side 5-1 is greater than an area of the inner side 5-2. The filter lines 5 are fluidly connected to the inside of the filter drum 1 through the filter cloth 4 on its inner side 5-2. For this purpose, a filtrate Sammetabschnitt 1 1 separate for each filter cell 5 is provided inside the filter drum 1, in which a filtrate, which passes through the filter cloth 4, is collected (see the following description of the filtration). The filtrate taken in the filtrate collection section 11 is by an associated inner pipe 13 in. Inside the filter drum 1 to eg one of the faces of the filter drum! 1 led and spent there.

As shown in Figures 3 and 4, the filter drum! 1 of the

Multi-cell filter device provided in a housing 31. The housing 31 receives the filter drum 1 and rotatably supports it therein. As described in detail below, a suspension 33 is fed into the housing 31, which is filtered by means of the multi-cell filter device. For this purpose, the suspension 33 is entered into the upper of the filter cells 5, wherein a filtrate 35 emerges from the filter cells 5 through the filter cloth 4 through and in the filtrate-Samme labschnitten 11 is collected and output via the inner lines 13 from the multi-cell filter device. In this filtration arises from the particles of the suspension 33, which are retained in the filter cells 5 by the filter cloth 4, in the filter tents 5, a filter cake 37th

For feeding and inputting the suspension 33 into the filter cells 5, the

Multi-cell filter device comprises a suspension feeder 41, wherein the suspension feeder 41 has a suspension input area S with in this case two suspension input ports 45-1 and 45-2 for inputting the suspension 33 to be filtered into the filter cells 5. Of the

Suspension input area S is located on a (radially) upper side of

Filter drum 1, and the two suspension input ports 45-1 and 45-2 are disposed in the suspension input portion S above the filter drum 1, wherein the suspension input portion S in the circumferential direction of the filter drum 1 is defined by a suspension input angular range α of the filter drum 1, which is 0 ° and 360 ° as an upper rail SP of the fifting drum 1, extends at least substantially from 330 ° to 5 ° (see Figure 4). Here, the first suspension input port 45-1 is disposed at about 342 ° and serves to input the suspension 33 into the filter cells 5 at a low input rate (prefilling), and the second suspension input port 45-2 is located at about 0 ° and serves to input the Suspension 33 in the Fitterzellen 5 with a high input rate

(Main filling). Consequently, the suspension 33 can be introduced from the two suspension input openings 45-1 and 45-2 from above into the radially outwardly open fitter cells 5 during the rotary operation or rotation of the fifting drum 1. In the housing 31 is further provided a washing liquid supply means 51 for supplying a washing liquid 53 to the filter drum 1, wherein the

Washing liquid supply means 51 a washing liquid input portion W with e.g. four washing liquid insertion holes 55-1 to 55-4 for inputting the

Washing liquid 53 has in the filter lines 5. The washing liquid input area W is defined by a washing liquid input angle range β of about 5 ° to 77 °. The washing liquid insertion openings 55-1 to 55-4 are in the

Circumferential direction in the washing liquid input portion W arranged in order, e.g. are the first, the second, the third, and the fourth

Washing liquid input port 55-1 to 55-4 at about 18 °, 36 °, 54 ° and 72 °, respectively. The washing liquid input ports 55-1 to 55-4 serve to remove e.g. at different input rates, the wash liquid 53 (e.g., various

Types of washing liquids, e.g. Alcohol or water) on the filter cake 37 in the Fitterzellen 5 to clean it. The washing liquid 53, after passing into the interior of the filter drum 1, also forms a filtrate 35, which is collected by the filtrate collecting sections 11, passed over the inner conduits 13 and discharged from the multi-cell filter device.

Next, in the housing 31 in the direction of rotation (see arrow DS in Figures 3 and 4) of the filter drum 1 then to the washing liquid input area W a

Trocknungsberetch T provided, which is provided at least substantially at the bottom of the filter drum 1 and which, for. is defined by a drying angle range γ of about 75 ° to 240 °. In this drying region T, the filter cake 37 is dried, that is, residual liquid remaining in the filter cake 37 is removed as the filtrate 35. A drip catcher 55 may be provided at the bottom of the housing 31, e.g. Wash fluid residues 53 to collect and from the

Remove multicell filter device. The drying of the filter cake 37 can be assisted analogously to the feeding and introduction of the suspension 33 or the washing liquid 53, i. by blowing a drying gas, which is not further described here.

To output the filter cake 37 from the filter pads 5 is after the

Drying area T a filter cake dispenser 61 is arranged. Here, the Fitterkuchen dispenser is at about 275 ° and has a nozzle 63 and an output shaft 65. By means of the nozzle 63, a gas flow to the Fiterzelle 5, which is currently moved past this to the

Blow out filter cake 37. This falls under the influence of gravity in the

Output shaft 63 and can be output from the multi-cell filter device. The nozzle 63 may e.g. be supported or replaced by a mechanical scraper (not shown), which cyclically penetrates into the past it moved filter cells 5 and the filter cake 37 breaks out. Also, alternatively or additionally, a pressure (e.g., a gas pressure) may be generated on the inner side 5-2 of the filter cell 5 via the inner conduit 13 which additionally or alternatively pushes the filter cake 37 away from the filter cloth 4.

For washing off any adhering to the filter cloth 4 or in the filter cells 5 residues of the filter cake 37, a filter cell cleaning device 71 may be provided after the filter cake dispenser 61. This can be arranged approximately at 315 ° and can analogously to the washing liquid supply device 51st

be formed to clean the filter cells 5 with a washing liquid 73. This can also be deducted via the inner pipes 13. Subsequently, the filter cells 5 are ready for a renewed suspension input.

In addition, the multi-cell filter device with a

Pressure difference generating means 81 (e.g., a sub-Z overpressure pump) may be provided, which in the inner conduits 13 provides a pressure to the. Ambient pressure of the filter drum 1 is different. The one of the

Pressure difference generating means 81 generated pressure may e.g. by means of a control disc (not shown) in the inner conduits 13. That is, the inner pipes 13, which rotate together with the filter drum 1, are at openings of the control disk, which is located on the front side of the filter drum 1 stationary in the housing 31, moved past and with the openings

connected in sections. For example, the

Pressure difference generating means 81 generate a negative pressure, which causes a pressure difference across the filter cells 5, so that in the suspension input area S and / or in the washing liquid W and / or in the drying area T, the suspension 33 and the filter cake 37 is sucked / pressed into the filter cells 5 to the To assist filtration or to provide a holding force on the filter cake 37 in the filter cells 5. As described above, an overpressure can also be generated in the inner lines 13, for example in the region of the filter cake. Output device 61. That is, the pressure difference can be selectively provided in the various peripheral regions of the filter drum 1.

In addition, a control device 91 may be provided with a level sensor 93. The level sensor 93 is e.g. disposed adjacent to the suspension input port 45-2 to move a suspension level of each one past it

To detect filter cell 5. The detected level may be transmitted to the control device 91 and used there to detect e.g. controlling a rotational speed of the filter drum 1, a washing liquid input amount, the generated differential pressure, etc.

For example, the washing liquid input quantity and a negative pressure which is present at the filter tents 5 in the washing liquid input region W can be matched to the rotational speed of the filter drum 1, so that precisely the required quantity of washing liquid is sprayed into the filter cells 5 passing by it and is drawn off by the negative pressure.

As shown in Figs. 3 and 4, all areas (the

Suspension input section S, the washing fluid input section W, the

Trockenbe rich, etc.) within the housing 31 interconnected, e.g. directly adjoining each other without additional sealing areas, i.e., they are in fluid communication. Further, the housing is connected via the output shaft 63 and the drip catch 55 to the atmosphere. Consequently, no separately sealed closed area is present in the housing 31, i. , There are no individual, acted upon with different pressure chambers in the housing 31, which allows a simplified sealing of the housing 31 and the filter drum 1. That is, by means of the suspension input region S, the suspension can be fed to the filter cells 5 at least essentially without additional pressure, for example, essentially only by gravity. However, it may be possible to fit the interior of the housing 31 e.g. to be separated from the atmosphere as a whole, e.g. to provide a housing interior jerk or to complete the fitting process, e.g. under

To perform protective gas.

Hereinafter, with reference to FIG. 3, a method of feeding the suspension 33 to be filtered to the multi-cell filter device having the above-described structure will be explained. The filter drum 1 shown in Fig. 3 is rotated clockwise (see arrow DS) with the filter cells 5 moved below the suspension input ports 45-1 and 45-2. As soon as a fitter cell 5 is at least substantially vertically below the first suspension input opening 45-1, it is controlled by the control device 91 to dispense a first quantity of suspension 33. The suspension 33 flows under gravity into the filter tents 5, so that the filter tents 5 is pre-filled. Before the now prefilled filter line 5 moves out below the first suspension input port 45-1, the suspension input is controlledly terminated by the control device 91. For example, the rotation of the filter drum 1 can be interrupted during the entering of the suspension 33 into a respective filter cell 5 and respectively resumed after the input, eg controlled by the control device 91. The

Suspension input amount for prefilling is e.g. chosen so that the filter cloth 4 of the filter cell 5 is completely wetted with suspension 33, but no suspension over the radial and end filter cell walls 7 and 9 passes. The pre-filled

Filter cell 5 is clocked or continuously moved due to the rotation (see arrow DS in Figure 3) of the filter drum 1 below the second suspension input port 45-2, wherein the control device 91 controls the second suspension input port 45-2, further suspension 33 in the prefilled filter cell enter. This is e.g. executed so long until the level sensor 93 outputs a level of the filter cell 5, which corresponds to a predetermined level value. Also the second

Suspension input port 45-2 inputs the suspension 33 at least substantially under the action of gravity into the prefilled filter cell 5. The suspension input of the second suspension input port 45-2 is completed before a new pre-filled filter line 5 moves below the second suspension input port 45-2. Simultaneously with the second suspension input, the

Pressure differential generating means 81 on the inside 5-2 of the pre-filled and / or the fully-filled filter cell 5 generate a negative pressure to perform the filtration or support. By means of these two

Suspension inputs are the filter cells 5 of the drum fittertrommel 1 continuously, ie continuously or clocked, filled with the suspension 33. Since this filling takes place with known (controlled) suspension amounts into the individual filter cells 5, the suspension input volume used conventionally (ie, the sealed chamber or the trough) can be omitted. Also, the input of the suspension 33 may be performed without controlling the control device 91 using, for example, predetermined parameters regarding the amount of suspension input, the filter drum speed, a cycle time, etc

Supply of the suspension to the filter cells 5 can be discontinuous or continuous. In continuous suspension feed is, for example, by means of

Control device 91, the respective supply amount of each

Suspension input opening 45-1 and 45-2 synchronized with the speed of the filter drum 1 such that the filter drum 1 is filled in each case without overflow of suspension (for example, in several Füterzellen 5}.

With the invention described above, it is obviously possible to obtain solid and / or filtrate from the suspension with sufficient warranty according to a first-in-first-out method.

Claims

claims

A multi-cell filter device comprising: a filter drum (1) having a longitudinal axis (A) extending horizontally and being rotatable about its longitudinal axis (A). and which defines a lateral surface (3), a plurality of filter cells (5) which are formed on the outer surface of the lateral surface (3) and which are each radially outwardly open and distributed over the circumference of the filter drum (1) and in the circumferential direction the filter drum (1) are arranged side by side and which are separated from each other by means of respective Radiai filter cell walls (7) which are arranged in angular intervals corresponding to a circumferential width of the filter cells (5), and a suspension feeder (41) for supplying a Filtering suspension (33) to the filter drum (1), wherein the suspension feeder (41) has a suspension input area (S) with at least one

Suspension input opening (45-1, 45-2) for introducing the suspension (33) to be filtered into the filter cells (5), the suspension input area (S) being arranged above the filter drum (1) so that the suspension (33) to be filtered during a rotational operation of the filter drum (1) of the at least one

Suspension input opening (45-1, 45-2) from at least substantially from above into the radially outwardly open filter cells (5) can be entered, wherein the

Suspension input region (S) is an unsealed closed region, such that in the suspension input region (S) there is no sealed chamber spanning a plurality of adjacent filter cells (5) and in a suspension volume exceeding a receiving volume of the filter cells present in the suspension input region (S) (5), with a different from the ambient pressure of the filter drum (1) fluid pressure can be acted upon

2. Multi-cell filter device according to claim 1, further comprising

a washing liquid supply means (51) for supplying a washing liquid to the filter drum (1), wherein the washing liquid supply means (51) has a Washing fluid input area (W) with at least one

A washing liquid inlet opening for introducing the washing liquid into the filter cells (5), and a drying area (T) for drying the suspension received in the food cells (5) and / or the filter cake accommodated in the filter cells (5), wherein in a space between the Filter drum (1) and a housing (31) in which the drum (1) is received, the

Suspension input area (S), the washing liquid input area (W), the

Dry area (T) and in the circumferential direction of the filter drum (1) further a range to the suspension input area (S) are in fluid communication and adjoin each other without additional sealing areas.

3, Mutticellenfiltervorrichtung according to claim 1 or 2, wherein the

Suspension input region (S) in the circumferential direction of the filter drum (1) is defined by a suspension input angular range (a) of the filter drum (1) corresponding to 0 ° and 360 ° as an upper vertex (SP) of the filter drum (1) at least substantially from 300 ° to 30 °, optionally at least substantially from 345 ° to 15 ° and further optionally at least substantially from 350 'to 10 °.

A mammalian cell filter device according to any one of the preceding claims, wherein the suspension supply means (41) has a plurality of suspension input ports (45-1, 45-2) which are provided in the suspension input region (S) along the

Longitudinal axis (A) of the Fiftertrommel (1) are arranged and / or in the circumferential direction of the filter drum (1) with angular intervals, which correspond to the angular intervals of the radial filter cell walls (7) are spaced from each other.

The mammalian cell filter device according to any one of the preceding claims, further comprising: a washing liquid supply means (51) for supplying a washing liquid (53) to said filter drum (1), said washing liquid supply means (51) having a washing liquid input portion (W) with at least one washing liquid input port (55-1 to 55-4) for entering the washing liquid (53) in the filter cells (5), wherein the washing liquid input region (W) is arranged above the filter drum (1), so that the washing liquid (53) during the rotary operation of the filter drum (1) of the at least one

Washing liquid input port (55-1 to 55-4) from above into the radially outwardly open filter cells (5) can be entered.

6. The multi-cell filter device according to claim 5, wherein the

Washing liquid input area (W) in the circumferential direction of the filter drum (i) is defined by a Waschflüssigkeitseingabewinkeibereich (ß) the Filtertrommei (1), with respect to 0 ° and 360 ° as an upper vertex (SP) of the filter drum (1) according to at least substantially from 0 ° to 75 °, optionally at least substantially from 15 ° to 60 °, further optionally at least substantially extending from 30 ° to 45 °.

7. Multi-cell filter device according to claim 5 or 6, wherein the

Washing liquid supply means (51) a plurality of washing liquid inlet openings (55-1 to 55-4), which in the washing liquid input region (W) along the longitudinal axis (A) of the filter drum (1) are arranged and / or in the circumferential direction of the filter drum (1) Angular distances corresponding to the angular intervals of the radial filter cell walls (7) are spaced from each other.

The multi-cell filter device according to any one of claims 5 to 7, wherein the washing liquid input region (W) is an unsealed closed region such that there is no sealed chamber in the washing liquid input region (W) spanning and sandwiching a plurality of adjacent filter cells (5)

Wash liquid volume, the volume of a recording in the

Washing liquid input region present filter cells (5) goes, with a by the ambient pressure of the filter drum (1) deviating fluid pressure can be acted upon.

9. A method for supplying a suspension to be filtered to a multi-cell filter device according to any one of the preceding claims, wherein: during the rotary operation of the filter drum (1) the filter cells (5) at least vertically below the suspension input port (45-1, 45-2) of the suspension -Zupühreinrichtung (41) are moved past and the suspension (33) at least substantially only by gravity from above into the filter lines (5) is entered into.

10. The method according to claim 9, wherein the inputting of the suspension (33) in the filter line (5) is interrupted in each case before a new filter cell (5) under the

Suspension input opening (45-1, 45-2) is moved.

11. The method according to claim 9 or 10, wherein the inputting of the suspension (33) in the filter cells (5) without filter cell cross, from the ambient pressure of

Filter drum (1) deviating fluid pressure occurs.