DE4223022A1 - Sludge water extraction assembly - comprising a double membrane system in the sludge chamber with almost continuous sludge feed and extraction of filtered material - Google Patents

Abstract

The sludge chamber assembly, to remove water, has a cover (3) fixed in position with the base (4). A carrier frame (21), with a pressure membrane (6) as a double membrane (22), has at least one inlet (23) for a pressure medium. The carrier frame (21) is driven up and down within the cover (3) to remove the collected filtered matter and close the sludge chamber (2). The inlet (23) at the double membrane (22) is connected to a compressed air supply. The carrier frame (21) has an upper (25) and lower (26) frame section, with the double membrane (22) between them. The sludge chamber (2) has a number of inlets (33) for the sludge at the lower frame (26), with connections to a collection channel, at the two side edges of the lower frame (26). USE/ADVANTAGE - The appts. is used for the extraction of water from sludge, and similar material. The appts. is simple, and can be assembled in a variety of structures as building blocks.

Description

The invention relates to a device for dewatering Mud and similar substances, with at least one all closed sludge chamber, which filter surfaces and has a sludge inlet connected via a line is connected to a pump generating the filtration pressure, the filter surfaces in the sludge chamber between sta tional and movable pressure surfaces are arranged and after switching off the pump to reduce the volume of the Mud chamber can be pressurized, and the Mud chamber containing the movable pressure surfaces the lid and one contain the fixed pressure surfaces has the bottom, further comprising the sludge chamber from the Filter surfaces in the form of a horizontal and straight line in terminating filter belt and a pressure membrane bran exists, and the pressure membrane with sealing strips verse hen which is in the closed position sealing fit the filter belt.

Such a device is according to an earlier one blow of the applicant from DE-OS 40 11 776 known. At this known device is the pressure membrane an upper pressure plate forming a press crosshead Pressurized by high pressure generator is driven. The high pressure generators are hydraulic piston-cylinder units.

In terms of efficiency, though, that after the previous one Proposal known construction practically the first conti  represents chamber filter press working properly the invention has for its object to this effect improve that reduce the design effort considerably gert, and also a construction possible is building different forms of Vorrich allowed according to the modular principle.

This object is essentially achieved according to the invention solved that the lid is fixed to the floor is that a day frame bearing the pressure membrane is provided hen is that the pressure membrane is designed as a double membrane and has at least one inlet for a pressure medium points, and that the support frame with the double membrane inside the lid to discharge the filter cake and to close the sludge chamber by a drive and is mobile.

It is obvious that through this construction the mechanical effort is extremely low and hardly be moving parts are required after only by a simple drive a frame, namely the double membrane supporting frame must be moved while the press stroke itself in the manner of a membrane filter press by inflating and relieving the pressure membrane where but in the present case this pressure membrane as Double membrane is formed and the membrane filter press tightness problems do not occur can. Any high pressure generator apart from one suitable source of a pressure medium for the double membrane, are not required.

In a particularly preferred embodiment according to the Invention is the inlet of the double membrane with one Compressed air source connected.

The support frame is an advantageous Weiterbil dung according to the invention of an upper frame and a Un terrahmen, between which the double membrane is held.  

This allows a particularly simple construction of the double membrane made of two correspondingly strong or reinforced gum cover, which in its edge area either directly through the upper frame and the lower frame are clamped together or can be additionally glued.

To fill the sludge chamber and build up the hydrostatic pressure with high efficiency degree, it is further preferred that the Mud chamber has several sludge inlets.

It is particularly advantageous from a construction point of view is responsible for removing the sludge inlets in the subframe form.

The mud inlets in the subframe are above connecting lines with a bus line the.

The mud inlets are advantageously on the two side edges of the subframe arranged what the The advantage is that the necessary connecting lines all be arranged laterally outside the press can.

In an advantageous development according to the invention is the double on the side facing away from the mud chamber membrane provided a pressure plate, which is a stationary Support the back of the double membrane forms. Here is achieved in a structurally simple manner that the Pressure with which the double membrane is applied, le diglich acts in the direction of the mud chamber.

The pressure plate is advantageously with the Bo that containing the sludge chamber and stationary therein Printing area connected to a rigid frame, so that the applied pressure is added within this frame is and the construction carried out comparatively easily  can be.

In an advantageous development according to the invention is one between the pressure plate and the double membrane Support plate provided. This has the advantage that here possible by simply hanging the double membrane is.

This embodiment can advantageously be further educated that on the overhead exterior side of the double membrane attached support plate over Bolt or the like. Connected to the upper pressure plate is such that this causes the pressure plate the suspension for the double membrane.

In particular, the invention can be further developed by this that the printing plate from interconnected Dop pel-T carriers exist. This ensures that when Construction of the device according to the invention on available construction parts can be used in a cost-effective manner.

In an advantageous development according to the invention is the support frame through the drive versus the pressure plate can be moved up and down.

Advantageously, the support frame carries on the Filter band facing side the sealing strips, which for Closing the sludge chamber into engagement with the filter belt reach.

In particular, the invention can be further developed by this the that in the sludge chamber between the filter belt and the lower pressure plate with a known plate upwardly open filtrate channels is provided, and that both the upper run and the lower run of the filter belt run on the top of the plate. This will achieved particular advantage that if several such Devices according to the invention for the formation of several  Ren mud chambers are stacked on top of one another particularly easy guidance of the associated filter tapes is possible, and also an additional printing plate te between two superimposed devices is saved.

In this embodiment, it is preferred that in the Sealing strips opposite surface area of the surface Chen the plates reinforcement plates are embedded, wel che preferably consist of V2A steel. This will create a longer life and a higher tightness of the Guaranteed sludge chamber.

It is also preferred to drive the support frame at the same time as generating the sealing pressure between the Form support frame and the filter belt, the An powered from a number of double-acting piston cylinders units can exist, which between the support frame and the pressure plate are effective.

The device according to the invention is particularly advantageous dung built modular, whereby a first building block by the pressing device is formed, which side by side or can be arranged one above the other with similar components is, with each block on one side by a also modular unit with the drive of the Filter belt and on the other hand by another modular unit with the deflection and clamping unit direction of the filter belt can be added. This will make him is enough that using three basic building blocks can produce any press configuration, so that the throughput and performance of such a device in the simplest way to the respective requirements nisse can be adjusted.

A particularly advantageous embodiment, which a quasi continuous operation is made possible created that at least three superimposed,  the building blocks forming the press unit with the associated Components of the filter belt are provided.

This embodiment can be according to the previous one Proposal by the applicant according to DE-OS 40 11 776 thereby advantageously designed that each of the mud inlets of the Blocks connected to a manifold via closing valves is closed that the manifolds check valves sen that the manifolds of the building blocks to a main line are connected so that the main line cont is only acted upon by the pressure of the pump, and that a controller is provided, which the check valves, the Closing valves, the compressed air supply of the double membrane, the drive of the support frame and the drive of the filterban of the individual building blocks according to the work cycle controls in such a way that the sludge feed and the discharge of the Filter cake almost continuously, but from different NEN sludge chambers.

In the following the invention based on in the drawings gene exemplary embodiments illustrated in more detail explained. It shows:

Figure 1 is a schematic side sectional view of the core of the device according to the invention containing the sludge chamber in the state in which the hydrostatic pressure is built up by feeding the sludge.

. Being applied in the illustrated phase of the additional pressing pressure with the double membrane 2 is a view corresponding to Fig 1 of the device according to the invention.

Fig. 3 is a Figures 1 and 2 corresponding view during discharge of the filter cake before re-closing of the sludge chamber.

Figure 4 is a plan view of the double membrane from above with its support plate and the support frame supporting the double membrane.

Fig. 5 is a more detailed side sectional view, which speaks ent essentially the representation of FIG 2;

Figure 6 shows a detail of Figure 5;

7 is a side, partially sectioned and highly schematic view of a device according to the invention in its entirety.

Fig. 8 is a sectional view taken along the line VIII-VIII of Fig. 7;

Fig. 9 is a sectional view taken along the line IX-IX of Fig. 7;

. FIG. 10 is a side sectional view of Figure 7 corresponding to a further embodiment of the invention;

FIG. 11 shows a sectional view of the embodiment according to FIG. 10 along the line XI-XI in FIG. 10;

FIG. 12 shows a sectional view of the embodiment according to FIG. 10 along the line XII-XII in FIG. 10;

Fig. 13 according to the invention illustrates a schematic representation showing the variety of possible configurations press veran and

FIG. 14 shows a schematic illustration of the control as it can be used in the embodiment according to FIGS. 10 to 12.

For a general description of the device according to the invention, reference is first made to FIGS . 1 and 7.

The illustrated device 1 according to the invention is used for dewatering sludge and similar substances and can also advantageously be used for sludges which do not allow the use of flocculants, such as ceramic sludge or food sludge.

The device 1 has a closed sludge chamber 2 on all sides, which is formed by a cover 3 and a Bo 4 .

The sludge chamber 2 contains filter surfaces 5 , which hold back the filter cake and let the filtrate through. Above the filter surface 5 , a pressure membrane, generally designated 6 , is arranged, by means of which an additional pressure can be exerted on the sludge to be dewatered after reducing the volume of the sludge chamber 2 after a definable size of a hydrostatic pressure has been reached, which by means of a Pump 7 was built up in the sludge chamber 2 .

As shown, the filter surface is 5 in the sludge chamber 2 between a lower stationary pressure surface 8, the loading stand part of the bottom 4 of the sludge chamber 2 forms, and an upper pressure surface 9 is arranged, which in the illustrated embodiment by the facing towards the sludge chamber 2 side of the pressure diaphragm 6 is formed. The upper pressure surface 9 is movable and serves to reduce the volume of the sludge chamber 2 , thereby applying the above-mentioned additional drainage pressure. The movable pressure surface 9 is contained in the cover 3 .

In the illustrated embodiment, the filter surface 5 is formed by a horizontal and rectilinear intermittent circumferential filter belt 10 , which is movable with an open sludge chamber by a drive explained in more detail below.

As can be seen in particular from Fig. 7, the filter belt 10 , one goes for the purpose of the description from the left since the end of the device 1 Lichen from the illustration of FIG. 7, leads on a pressure-loaded deflection roller 11 , and then runs through the Mud chamber 2 . Outside the sludge chamber 2 , the filter belt 10 runs at the right end of the device 1 in the illustration according to FIG. 7 via a second deflection roller 12 which is driven by a drive 52 . From there, the filter band 10 again runs through further rolls 15 and 16 through the mud chamber 2 , the lower run 38 of the filter belt 10 running below the upper run 37 in this area. At the left end of the sludge chamber 2 in the illustration according to FIG. 7, the lower run 38 of the filter belt 10 again runs over rollers 53 and 54 and a further loaded roller 55 back to the deflection roller 11 . The deflection roller 11 and the loaded roller 55 are also provided with 20 Geradlaufeinrichtun.

As can also be seen from FIG. 7, a washing device 14 or the like is also seen for cleaning the filter belt 10 before it runs into the sludge chamber 2 with its lower run 38 below the upper run 37 .

How connection with Fig especially from the view of FIG. 1 in Ver. Arises, the lid 3 is fixedly connected to the floor 4 by means of lateral supports 56. In the interim rule space between the base 4 and cover 3 is provided a pressure membrane 6-supporting support frame 20 which holds the outermost edge of the pressure membrane. 6 The pressure membrane 6 is designed as a double membrane 22 and, as illustrated in more detail in FIG. 2, has at least one inlet 23 for a pressure medium.

From the combination of FIGS. 1 through 3 shows that the supporting frame 20 up and down together with the edge of the double membrane in the cover 3 for the discharge of the filter cake 48 and to close the sludge chamber 2 by a generally designated 24 drive abbeweglich.

In a preferred embodiment according to the invention, the inlet or the inlets 23 of the double membrane 22 is connected to a compressed air source.

The support frame 21 consists of an upper frame 25 and a lower frame 26 , the double membrane 22 being held between the two frames.

The upper frame 25 is connected to the lower frame 26 by a number of bolts 57 .

On the side of the double membrane 22 facing away from the mud chamber 2 , a pressure plate 27 is provided, which forms a fixed support for the rear of the double membrane by rigid connection with the cover 3 . As already mentioned, the pressure plate 27 is connected by this arrangement with the bottom 4 of the sludge chamber 2 forming the fixed pressure surface 8 to a rigid frame 29 , since the side supports 56 lateral extensions 58 of the pressure plate 7 connect the bottom 4 .

In the preferred embodiment according to the invention illustrated in the drawings, a support plate 28 is seen between the pressure plate 27 and the double membrane 22 , which is fastened on the upper outside of the double membrane 22 by gluing or vulcanization and additionally by means of the support plate 28 and the upper half of the double membrane 22 is held through inlets 23 .

The on the upper outside of the double membrane 22 so fastened support plate 28 is in turn connected via bolts 43 or the like. With the upper pressure plate 27 , so that the pressure plate 27 forms a suspension on for most of the area of the upper half of the double membrane 22 .

The sludge chamber 2 preferably has a plurality of sludge inlets 33 which, as illustrated, are arranged in the lower frame 26 and in particular on both side edges 34 of the lower frame 26 .

The sludge inlets 33 are connected on both sides of the device 1 via connecting lines 35 to a collecting line 36 which is pressurized by the pump 7 .

As further shown, the pressure plate 27 is made of interconnected double T-beams 17 , since this is a most cost-effective construction.

From the above description it is obvious that this type of construction of the support frame 21 can be moved up and down by the drive 31 relative to the pressure plate 27 , namely between a position closing the sludge chamber 2 , in which the support frame rests on the filter belt 10 and an open position in which the support frame is at a distance from the filter belt 10 which is sufficient to discharge the filter cake 48 .

In order to ensure that the sludge chamber 2 is sufficiently sealed abge in the ge closed position of the support frame 21, to withstand the hydrostatic pressure of the pump 7, on the filter belt 10 facing side of the support frame 21 attached sealing strips 30, wherein the sealing engagement the sealing strips 30 with the surface of the filter belt 10 are also provided by the drive 31 ago.

In the preferred embodiment according to the invention, a plate 39 made of plastic or the like is arranged in the area of the sludge chamber 2 between the filter belt 10 and the lower pressure surface 8 , which has filtrate channels 40 open at the top and via which the upper run 37 and the lower run 38 of the filter belt 10 are guided and extend over the top 41 of the plate 39 .

In the area opposite the sealing strips 30 area of the upper side of the plate 39 , reinforcement plates 42 are embedded, which, for example, are made of V2A steel.

As shown in FIGS. 7 and 8, consists of the drive 31 for the upward and downward movement of the support frame 21 of a number of small hydraulic cylinders, which are dimensioned Derar tig that they sufficiently apart from the movement of the supporting frame 21 for maintaining the sealing pressure are.

The operation of the device 1 according to the invention in the area of the sludge chamber 2 is explained in more detail below with reference to FIGS. 1 to 3 and with regard to some details on FIG. 5.

Figs. 1 to 3 show three successive stages in the dewatering of the sludge chamber 2.

In the state illustrated in FIG. 1, it was presupposed that the support frame 21 had been lowered on the filter belt 10 and the sealing engagement of the sealing strips 30 with the filter belt 10 had been established, so that under the pressure exerted by the hydraulic cylinder 32 the sludge chamber 2 is sealed, which is formed between the filter belt 10 and the double membrane 22 . In the state shown in FIG. 1, the pump 7 has filled the sludge chamber 2 via the collecting line 36 through the sludge inlets 33 in the subframe 26 , this process being continued until, for example, a hydrostatic pressure of about 5 bar in the pump 7 Mud chamber 2 is present. Due to the resulting dewatering, a pressable cake is now present in the sludge chamber 2 according to FIG. 1.

After reaching this definable hydrostatic pressure, closing valves 37 and a check valve 38 , which are explained in more detail below, are closed, so that the Schlammkam mer 2 is switched off with respect to the pump 7 .

As can be seen from FIG. 2, the double membrane is then pressurized with air pressure via the inlets 23 , whereby the volume of the sludge chamber 2 is reduced and, accordingly, additional pressure is exerted on the sludge cake 48 . The pressure applied here can be 15 bar or more, the reaction forces of the upper half of the double membrane 22 being taken up by the pressure plate 27 , so that all reaction forces are present in the closed system of the rigid frame 29 .

As seen from Fig. 3, the double membrane 22 is then released and the support frame moves to the edge region of the double membrane 22 by the drive 31 inside the cover 3 upward so that the filter cake 48 by actuation of the drive 46 of the filter belt 10 from the Sludge chamber 2 can be moved out, at the same time a fresh, unused piece of filter belt 10 is inserted into the sludge chamber 2 .

Alternatively, as a further working step between the state according to FIG. 2 and the state according to FIG. 3, after relieving the pressure on the double membrane 22, a washing and cleaning medium can be introduced via inlets (not shown) likewise arranged in the subframe 26 in order to create the sludge cake 48 washing, while still drying the sludge cake can be carried out over more inlets 48 before raising 22 of the support frame 21 after he plural pressurizing the double membrane and the filter cake is discharged 48th

In any case, the supporting frame is only moved to extend the filter cake 48 and to close the sludge chamber 2 again , and this with a comparatively inexpensive and simply constructed drive, while the actual pressing process on the one hand hydrostatically via the pump 7 and on the other hand pneumatically or hydraulically via the double membrane 22 he follows.

Because of this simple construction and the special guiding of the filter belt 10 , it is possible to build the entire device in front of any variation from building blocks, some such examples being illustrated in FIG. 13. In this case, a first module 80 forms the actual press unit, that is to say the region as is illustrated very schematically in FIGS . 1 to 3. This block 80 can be used side by side or one above the other with similar blocks, with each of these blocks 80 on the one hand, a module 81, also of modular construction, being supplemented with the drive 84 of the filter belt 10 , ie including the drive motor 52 , while on the on the other side of the module 80, a further modular unit 82 can be attached, which contains the deflection and tensioning devices of the filter belt 10 , as illustrated in more detail in FIG. 7.

According to Fig. 13A, there is therefore a simplest form of the device 1 before from the three components 80 , 81 and 82 , the component 80 containing the lid 3 , the bottom 4 and the mud chamber 2 , which in turn can form a sub-component, as in this Figure illustrates veran. 13 as a membrane chamber 85.

In Fig. 13B, a device 1 is constructed from the same building blocks, which has two sludge chambers 2 arranged one above the other. As shown, in this case the Bo 4 of the block 80 is replaced by a central pressure plate 86 , which simultaneously forms the cover 3 of the lower mud chamber 2 .

In the embodiment according to FIG. 13C, a device is again constructed from the building blocks 80 , 81 and 82 , which has a total of six sludge chambers on three floors. It is obvious that this construction can be varied as desired.

A constructed according to these basic principles, particularly preferred embodiment is illustrated in closer technical details in FIGS . 10 to 12.

As shown, in the embodiment according to FIGS. 10 to 12 three superimposed building blocks 80 with the associated building blocks 81 and 82 are provided, which form three mutually parallel mud chambers 2 with the associated drives and auxiliary units.

This design allows a mode of operation in which the sludge supply and the discharge of the filter cake quasi continuously, but from different sludge chambers 2 it follows. For this purpose, as is illustrated very schematically in FIG. 14, each of the sludge inlets 33 of the building blocks 80 is connected to the collecting line 36 via closing valves 44 , the collecting lines 36 in turn having check valves 45 . The collecting lines 36 of the building blocks 80 are connected to a main line 50 which is continuously subjected to the pressure of the pump 7 . A controller 51 serves the shut-off valves 45 , the closing valves 44 , the compressed air supply to each of the modules 80 associated double membrane 22 , the drives 31 to the respective support frame 21 and the drives of the filter belts 10 of the individual modules 80 , 81 , 82 in such a way control that all pressing units of the building blocks 80 work simultaneously, but alternating with each other. So practically the top unit 80 is just being acted upon by the hydrostatic pressure of the pump, while the middle unit 80 is pressing through the double diaphragm 22 and at the same time the bottom unit 80 the filter cake 48 extends. 1 practically provide the illustrations according to FIGS. To 3 snapshots of these processes is where in Fig. 1 for these selected moment the state of a uniform 80, Fig. 2 shows the state of the unit 80 b and FIG. 3 shows the state of the unit 80 c represents. In the subsequent cycle, the representation according to FIG. 1 corresponds to the state of the module 80 c, etc.

In this way it is achieved that at continuously tepid fender pump feeding the sludge to be dewatered and discharging the filter cake continuously, however from different levels, d. H. in terms of different Mud chambers, takes place during the actual drainage is carried out in discrete steps.

The device 1 according to the invention can of course also be operated discontinuously as a single unit.

All of the description, claims and drawings features and advantages of the invention, including constructive details and spatial Arrangements can be both for yourself and in any combination be essential to the invention.

Claims (22)

1. Device for dewatering sludge and similar substances with at least one all-round closed sludge chamber, which has filter surfaces and a sludge inlet, which is connected via a line to a pump producing the filtration pressure, the filter surfaces in the sludge chamber between stationary and movable union Pressure surfaces are arranged and after switching off the pump to reduce the volume of the sludge chamber can be pressurized, and wherein the sludge chamber has a cover containing the movable pressure surfaces and a bottom containing the stationary pressure surfaces, wherein the sludge chamber from the filter surfaces in the form of a horizontal and there is a straight line intermittent around the running filter belt and a pressure membrane, and the pressure membrane is provided with sealing strips, which in the closed position lie sealingly on the filter belt, characterized in that the cover ( 3 ) is stationary connected to the bottom ( 4 ), that a support frame ( 21 ) carrying the pressure membrane ( 6 ) is provided, that the pressure membrane ( 6 ) is designed as a double membrane ( 22 ) and has at least one inlet ( 23 ) for a pressure medium, and that the support frame ( 21 ) with the double membrane ( 22 ) in the lid ( 3 ) for discharging the filter cake ( 48 ) and for closing the sludge chamber ( 2 ) by a drive ( 24 ) is movable up and down. 2. Device according to claim 1, characterized in that the inlet ( 23 ) of the double membrane ( 22 ) is connected to a compressed air source. 3. Apparatus according to claim 1 or 2, characterized in that the support frame ( 21 ) consists of an upper frame ( 25 ) and a lower frame ( 26 ), between which the double membrane ( 22 ) is held. 4. Device according to one of the preceding claims, characterized in that the sludge chamber ( 2 ) has a plurality of sludge inlets ( 33 ). 5. Apparatus according to claim 3 or 4, characterized in that the or the mud inlets ( 33 ) in the Unterrah men ( 26 ) are formed. 6. The device according to claim 4 or 5, characterized in that the sludge inlets ( 33 ) via connecting lines ( 35 ) are connected to a collecting line ( 36 ). 7. The device according to claim 6, characterized in that the sludge inlets ( 33 ) on both side edges ( 34 ) of the lower frame ( 26 ) are arranged. 8. Device according to one of claims 3 to 7, characterized in that on the side of the double membrane ( 22 ) facing away from the sludge chamber ( 2 ) a pressure plate ( 27 ) is seen which has a fixed support for the rear side of the double membrane ( 22 ) forms. 9. The device according to claim 8, characterized in that the pressure plate ( 27 ) with the bottom ( 4 ) of the Schlammkam mer ( 2 ) containing and therein fixed pressure surface ( 8 ) is connected to a rigid frame ( 29 ). 10. The device according to claim 8 or 9, characterized in that between the pressure plate ( 27 ) and the double membrane ( 22 ), a support plate ( 28 ) is provided. 11. Device according to one of the preceding claims, characterized in that the on the upper outer side of the double membrane ( 22 ) attached to the support plate ( 28 ) via bolts ( 43 ) or the like. With the upper pressure plate ( 27 ) is connected, such that the pressure plate ( 27 ) forms the suspension of the double membrane ( 22 ). 12. Device according to one of claims 8 to 11, characterized in that the pressure plate ( 27 ) consists of interconnected double T-beams ( 17 ). 13. Device according to one of the preceding claims, characterized in that the support frame ( 21 ) by the drive ( 31 ) relative to the pressure plate ( 27 ) is up and down movable Lich. 14. Device according to one of the preceding claims, characterized in that the support frame ( 21 ) on the side facing the filter belt ( 10 ) carries the sealing strips ( 30 ). 15. Device according to one of the preceding claims, characterized in that in the sludge chamber ( 2 ) between the filter belt ( 10 ) and the lower pressure surface ( 8 ) a plate ( 39 ) with upwardly open filtrate channels ( 40 ) is seen before, and that both the upper run ( 37 ) and the lower run ( 38 ) of the filter belt ( 10 ) run on the top ( 41 ) of the plate ( 39 ). 16. The apparatus according to claim 15, characterized in that in the sealing strips ( 30 ) opposite surface area of the surface of the plates ( 39 ) reinforcing plates ( 42 ) are embedded. 17. The apparatus according to claim 16, characterized in that the reinforcing plates ( 42 ) consist of V2A steel. 18. Device according to one of the preceding claims, characterized in that the drive ( 31 ) is simultaneously formed for generating the sealing pressure between the support frame ( 21 ) and the filter belt ( 10 ). 19. The apparatus according to claim 18, characterized in that the drive ( 31 ) consists of a number of double-acting piston-cylinder units ( 32 ) which are effective between the support frame ( 21 ) and the pressure plate ( 27 ). 20. Device according to one of the preceding claims, characterized in that the device ( 1 ) is constructed in a modular manner and a first module ( 80 ) is formed by the pressing device, which can be arranged side by side or above one another with similar modules, wherein each module ( 80 ) on the one hand by a module ( 81 ) with a module ( 81 ) with the drive ( 84 ) of the filter belt ( 10 ) and on the other side with a further modular unit ( 82 ) with the order and Clamping device of the filter belt can be supplemented. 21. The apparatus according to claim 20, characterized in that at least three superimposed, the press unit forming blocks ( 80 ) with the associated building blocks ( 81 and 82 ) are provided. 22. The apparatus according to claim 20 or 21, characterized in that each of the sludge inlets ( 33 ) of the blocks ( 80 ) via closing valves ( 44 ) is connected to a manifold ( 36 ) that the manifolds ( 36 ) Sperrventi le ( 45 ) have that the manifolds ( 36 ) of the building blocks ( 80 ) are connected to a main line ( 50 ), that the main line ( 50 ) is continuously pressurized by the pump ( 7 ), and that a controller ( 51 ) seen before which is the shut-off valves ( 45 ), the closing valves ( 44 ), the compressed air supply to the double membrane ( 22 ), the drive ( 31 ) of the support frame ( 21 ) and the drive of the filter belt ( 10 ) of the individual components ( 80 , 81 , 82 ) controls according to the work cycle in such a way that the sludge supply and the discharge of the filter cake quasi continuously, but it follows from different sludge chambers.