ES2222107B1 - PRESSED FILTERING DEVICE. - Google Patents

Abstract

Press filter device comprising a first fixed plate (1) and a second fixed plate (2) connected by a substantially horizontal separating support structure (3) between whose first and second fixed plates a movable mobile plate (4) is arranged along the support structure (3) and driven by first drive means (5), a plurality of filter plates (6) being arranged between the first fixed plate (1) and the movable plate (4), movable to along the support structure (3) and being driven by second drive means (7-7n ''); The filtering plates (6) are grouped into a plurality of filtering modules (8-8n ''), the second drive means (7-7n '') of each of said filtering modules (8-8n ' ') independent of the first drive means (5) and independent for each of the filtering modules (8-8n' ').

Description

Press filter device.

Field of the Invention

The present invention is encompassed within filtering equipment used in the chemical industry and in wastewater treatment stations and more specifically within liquid filtration equipment with solid waste in suspension such as sludge, which are based on filter plates by pressing.

Background of the invention

Nowadays different are known filtering devices used for processing liquids with solid waste in suspension in stations water depuration.

For example some of the devices used They consist of press filter equipment. More concretely, these filtering equipment known today comprise a series of filter plates that are displaced against each other thanks to drive means such as a cylinder hydraulic, until they are pressed together defining in their inside a filtering chamber, then pumping the liquid to be filtered inside said filtering chamber, forcing him to follow a certain journey through the interior of the filter plates that, given their particular configuration, get the deposit of solid waste found in suspension in said liquid.

When the filtering process ends or when it is necessary to interrupt it due to an excessive accumulation of waste solids between the aforementioned filter plates, these need to be cleaned because the waste seals the passage of the liquid not being operational and having to be emptied of solid waste operational accumulated. Therefore, at this time the plates of Filtered must be separated to proceed to cleaning.

Formerly the manipulation of the plates filters, to proceed to its separation and therefore to its cleaning, was done manually producing large losses of time required to perform the aforementioned operation of separation and cleaning.

Later systems were developed semi-automatic mechanics consisting of lateral stringers in the ones that were suspended the filter plates with chains movable and drag hooks of the mimes for their separation.

Patent ES 477584 describes a press of filter plates that have guides located above the aforementioned filter plates which move along the guides thanks to a series of rolling stands, the supports rolling ends have two rolling supports along of the transversal guides.

On top of each of the brackets a trigger is articulated between whose branches a latch is arranged in solidarity with the corresponding support, said latch is antagonistic to a front tooth provided on the plate trigger contiguous filter. The filtering plate is carried out by means of hooks linked to an endless chain arranged by above the plate holders that are antagonistic to the upper teeth of the trigger and latch, being tilting around a transverse axis.

With this configuration the separation of plates that are joined together by means of those mentioned triggers and teeth, is achieved by the aforementioned hooks that they release the filter plates one by one.

Therefore when a release of the plates one by one, in the case of having the device a high number of plates, the cleaning of the plates supposes a considerable time.

On the other hand in the event that a breakdown in the endless drag chain is necessary to paralyze the Cleaning process completely until it can be repaired.

Therefore, a need for provide a filtering device composed of a system with press and a series of filter plates that includes a drive system of the different filter plates that enable them to be cleaned more quickly and efficient and designed so that in the event of a breakdown in the means for actuating the plates, the operation of the entire device.

Description of the invention

The present invention therefore relates to a pressing filter device comprising a first fixed plate and a second fixed end plate connected to each other by a substantially supporting support structure horizontal between whose first and second fixed plates there is a movable plate configured to move along the structure of support and driven by first drive means, a plurality of filter plates being disposed between the first fixed plate and mobile plate, likely to move along of the support structures and being driven by second means drive, establishing two operating positions of the device, a closed position in which the movable plate is approached, by the first drive, to the first plate fixed, moving away from the second fixed plate, pushing all the intermediate filter plates approaching until joined defining between the first fixed plate and the mobile plate, by the filter plates, a sealed compartment within which produces filtration, and an opening position in which the mobile plate is removed, by the first drive means, from the first fixed plate approaching the second fixed plate, causing separation of the filter plates to release the residues retained between said filter plates.

The present filtering device is characterized in that the filter plates are grouped in a plurality of filtering modules being the second means of actuation of each of the aforementioned filtering modules independent of the first means of actuation of the plate mobile, whose second drive means are in turn independent for each of the filtering modules and are configured to move consecutively in time to different filtering modules so that the drive start with the filtering module closest to the mobile board and once it has been activated, the drive is activated module immediately after and so on until bequeathing module that is closest to the first fixed plate.

This way a separation is achieved sequential filtering plates found in this case grouped in the aforementioned filtering modules. The separation of the plates that make up each filtering module are made in a way independent since each of the modules has some means independent actuators, in this case referred to as Second drive means.

The independence of the second means of drive makes it possible on the other hand that the system drive can continue to function even when a failure of the drive means of one of the modules of filtered out.

In addition the device has a system of synchronization of the drive of each of the modules being its successive liberalization starting with the module closest to the mobile board and ending with the module closest to the first fixed plate, which makes the drive and therefore the displacement of the different filtering modules by the separating support structure, is optimized to carry Perform more efficient cleaning of the filter plates.

Filtering plates and the first fixed plate they have two central holes configured to fit aligned when the device is in the closed position, said holes defining a conduit through which the liquid to filter.

In this way it is achieved that the liquid to filter penetrate in a simple way inside each of the filtering plates, producing a fast and simple filtering of said liquid.

Consecutive filtering plates belonging to the same filtering module are connected by connection elements configured so that when second drive means move to one of the plates of extreme filtering of the filtering module in question this strip to your instead of the filter plate immediately after and so successively until all the filtering plates of a certain filter module is separated from each other.

Cleaning is achieved in this way independent of each filtering module, having the possibility proceed to clean one of the modules, if it were necessary, regardless of the rest.

The connection elements arranged between two consecutive filter plates of the same filter module they consist of cable sections that have the same length, determining a constant separation between filter plates Consecutive of the same filtering module when the device Take the opening position.

The filter plates have a plurality of cavities and collectors configured so that when the device is in the closed position, the liquid to filter introduced at a certain pressure through the duct the mentioned cavities where solid waste is retained contained in the liquid to be filtered, passing the water to the collectors They pour into a common gutter.

The filter plates may be lined by a filter cloth that helps the filtration of the liquid to filter.

Brief description of the drawings

Then it goes on to describe very brief a series of drawings that help to better understand the invention and that expressly relate to embodiments of said invention which are presented as illustrative examples and not Limitations of this one.

Figure 1 represents a side view schematic of the filtering device object of the present invention, in its closed position.

Figure 2 represents side views schematics of the filtering device object of the present invention, in different phases of the opening of the device.

Figure 3 shows a side view of one of the filtering modules of the device object of the present invention, in the closed position.

Figure 4 shows a side view of one of the filtering modules of the device object of the present invention, in the open position.

Figure 5 shows an elevation and view side of one of the filter plates of the device object of The present invention.

Description of a preferred embodiment of the invention

As can be seen in figure 1 the device object of the present invention comprises a first fixed plate 1 and a second fixed plate 2 ends connected between yes by means of a support structure 3 separator that is arranged substantially horizontal.

Between the first and second fixed plates are it has a movable plate 4 configured to move along of the support structure 3 driven by first means of drive 5.

In addition, a plurality of plates of filtered 6 between the first fixed plate 1 and the mobile plate 4, liable to move along the support structures 3 being driven by second drive means 7-7 n ', see figure 2,

With this device configuration, two device operating positions are established
vo,

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a closing position, figure 1, in which the movable plate 4 is approached, thanks to the first drive 5, to the first fixed plate 1, moving away from the second fixed plate 2, pushing its time to all the intermediate filter plates 6 approaching each other and the first fixed plate until they are joined defining between the first fixed plate 1 and the mobile plate 4 and by the filter plates 6 a sealed compartment within which produces filtration, and

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a opening position, figure 2, in which the movable plate 4 is away, by the first drive 5, from the first plate fixed 1 approaching the second fixed plate 2, causing the separation of the filter plates 6 to release the residues retained between said filter plates 6.

In this preferred embodiment of the invention, the filter plates 6 are grouped in a plurality of 8-8 n 'filtering modules being the seconds drive means 7-7 n 'of each of the aforementioned filtering modules 8-8 n ' independent of the first drive means 5 of the plate mobile 4.

\hbox{7-7 ^{n'} }

son a su vez independientes para cada uno de los módulos de filtrado 8-8^{n'}, correspondiendo por ejemplo los segundos medios de accionamiento 7 al modulo de filtrado 8 y los segundos medios de accionamiento 7^{n'} al módulo de filtrado 8^{n'}.In addition the second drive means

 \ hbox {7-7 ^ n}} 

they are in turn independent for each of the filtering modules 8-8 n ', for example the second drive means 7 corresponding to the filter module 8 and the second drive means 7 n' to the module of filtering 8 n '.

In this preferred embodiment of the invention such and as can be seen in figure 1, the support structure 3 separator consists of at least one beam with double T, C or similar located above the filter plates 6 and supported for the first 1 and second 2 fixed plates. In this particular case two beams 20, 21 have been arranged. By the lower profile of the mentioned beams may move a carriage 22 arranged in the upper edge of the movable plate 4 that allows displacement Of the same.

Moreover, the first means of drive 5 of the movable plate 4, in this embodiment of the invention, consist of a hydraulic piston 23 fixed to the second fixed plate 2 that moves said mobile plate 4 along the support structure 3 thanks to the aforementioned cars 22.

The second drive means 7-7 ^ n 'consist of a plurality of cylinders tires, as seen in figure 2.

The second drive means 7-7 n ', as can be seen in the different phases of the device opening movement represented in the  Figure 2, are set to scroll consecutively in the time to the different filtering modules 8-8 n 'so that the drive starts by the filtering module 8 closest to the mobile plate 4 and a Once this has been activated, the drive is activated. module immediately after 8 'and so on until bequeathing to module 8 that is closest to the first fixed plate one.

The filter plates 6 and the first fixed plate (1) have two central holes 9 configured to fit aligned when the device is in the closed position, said holes defining a conduit 10 through which it is introduced The liquid to be filtered.

\hbox{7-7 ^{n'} }

desplazan a una de las placas de filtrado 6a extrema del módulo de filtrado 8 en cuestión esta tira a su vez de la placa de filtrado inmediatamente posterior 6b y así sucesivamente hasta conseguir que todos las placas de filtrado 6a-6n de un cierto modulo de filtrado 8 queden separadas entre sí.In this preferred embodiment of the invention, the consecutive filter plates 6 belonging to the same filter module 8 are connected by connecting elements 11-11 n 'configured so that when the second drive means

 \ hbox {7-7 ^ n}} 

they move to one of the extreme filter plates 6a of the filter module 8 in question this strip in turn of the immediately subsequent filter plate 6b and so on until all the filter plates 6a-6n of a certain filter module are achieved 8 are separated from each other.

\hbox{11-11 ^{n'} }

consisten en tramos de cable que además en este caso tienen la misma longitud, determinando una separación constante entre placas de filtrado consecutivas 6a, 6b de un mismo módulo de filtrado 8 cuando el dispositivo adopta la posición de apertura.More specifically the connection elements

 \ hbox {11-11 ^ n '} 

they consist of cable sections that also have the same length in this case, determining a constant separation between consecutive filter plates 6a, 6b of the same filter module 8 when the device adopts the opening position.

In addition, the filter plates 6 have a plurality of cavities 12 and manifolds 13 configured so that when the device is in the closed position, the liquid to be filtered introduced at a certain pressure through the duct 10 crosses the mentioned cavities 12 where the solid waste contained in the liquid to be filtered, passing the water to the collectors 13 that pour into a common gutter (no represented in the figures).

The filter plates 6 may also be lined by a filter cloth that helps filtration in in line with the mentioned cavities 12 practiced on the plates of filtering 6. With the configuration above, the process of Filtering will occur as follows:

First, before the filtration itself, the first drive means 5 begin to move by pushing the movable plate 4 in the direction of the first fixed plate 1, in this movement said mobile plate 4 drag the different filtering modules with it 8-8 ^ {n '} getting approximate until they remain one after the other together and determine a tight receptacle, between the first fixed plate 1 and the mobile plate 4, in which will produce the filtration itself.

Once the pressing of the plates, the liquid to be filtered is pumped under a certain pressure inside said receptacle through the defined duct 10 through the central holes 9 made in the filter plates 6, the liquid therefore fills the cavities 12 of the plates of filtered and by effect of the pumping pressure it is achieved that the water from it goes through the filter cloths of the plates filtered 6 and circulate through the collectors 13 arranged for this purpose in inside the filter plates 6, the water then passes from the collectors 13 to a common drainage channel that conducts it from new to the sludge generation process to recycle and use it again.

Solid waste is filling the cavities 12, forming solid cakes, when the cavities 12 have been filled completely solid waste is considered to have completed the filtering phase

Then the emptying phase of said solid residues found in the filter plates 6. First, the first drive means 5 move the movable plate 4 away from the first fixed plate 1, leaving a free space between the filter plates 6 and the mobile plate 4.

The second drive means 7 begins to act on the filtering module 8 closest to the mobile plate 4, as can be seen in the first drawing (A) of Figure 2, the second drive means 7 then pull the first filter plate 6a of filter module 8. Upon arrival a displacement of magnitude equal to the corresponding length connection element 11, this pulls the next filter plate 6b and so on until all the plates of the module are separated from filtered 8. Solid waste cakes are removed from space between two consecutive plates falling by simple gravity.

When the emptying of the first module of filtered 8, the second drive means 7 'act on the 8 'filter module located just after the same, making the 6a-6n filter plates of the  filter module 8 are collected as shown in the drawing (B) of figure 2.

This same process is going to be repeated. sequentially with the subsequent filtering modules 8 '' - 8 ^ n '' until you reach the last module of filtered 8 n 'which is actuated by the second means of 7 n 'drive to empty it.

For a better understanding of the system of synchronized drive of the filtering modules 8-8 n 'and as seen in Figure 2, the succession of movements would be given by the drawings (A) - (B) - (C) - (D) in which the emptying of the last module 8 n 'closest to the first fixed plate 1.

Once the solid waste cakes have fallen from this last filtering module 8 n 'the first 5 and seconds 7-7 n 'drive means 7-7 n 'move respectively to place the mobile plate 4 and to filter plates 6 of the different modules filter 8-8 n 'of the filtering device in its initial position and in this way it starts again all the process.

Claims (7)

1. Press filter device comprising a first fixed plate (1) and a second fixed end plate (2) connected to each other by a substantially horizontal separating support structure (3) between whose first and second fixed plates a plate is arranged mobile (4) configured to move along the support structure (3) and driven by first drive means (5), a plurality of filter plates (6) being arranged between the first fixed plate (1) and the plate mobile (4), capable of moving along the support structures (3) and being driven by second actuation means (7-7 n '), establishing two operating positions of the device, a closed position in which the movable plate (4) is approached, by the first drive (5), to the first fixed plate (1), moving away from the second fixed plate (2), pushing all the filtering plates (6) intermediate approaching until connected between the first fixed plate (1) and the mobile plate (4), by means of the filtering plates (6), a sealed compartment within which the filtration occurs, and an opening position in which the mobile plate ( 4) is removed, by the first actuators (5), from the first fixed plate (1) approaching the second fixed plate (2), causing the separation of the filter plates (6) to release the retained residues between said filtering plates (6), characterized in that the filtering plates (6) are grouped into a plurality of filtering modules (8-8 n ') being the second drive means (7-7 n') ) of each of the aforementioned filtering modules (8-8 n ') independent of the first drive means (5) of the movable plate (4), whose second drive means (7-7 n) '}) are in turn independent for each of the filtering modules (8-8 n') and are configured to move consecutively in e l time to the different filtering modules (8-8 n ') so that the drive starts with the filtering module (8) closest to the mobile plate (4) and once it has been activated it it proceeds to drive the module immediately afterwards and so on until it reaches the module (8 n ') that is closest to the first fixed plate (1). Device according to claim 1, characterized in that the filter plates (6) and the first fixed plate (1) have two central holes (9) configured to be aligned when the device is in the closed position, said holes defining a conduit (10) through which the liquid to be filtered is introduced. Device according to claim 1 and 2, characterized in that the consecutive filter plates (6) belonging to the same filter module (8) are connected by connection elements

 \ hbox {(11-11 ^ n ')} 

configured so that when the second drive means (7-7 n ') move to one of the end filter plates (6a) of the filter module (8) in question this in turn pulls the plate Immediately subsequent filtration (6b) and so on until all filtering plates (6a-6n) of a certain filtering module (8) are separated from each other. Device according to claim 3, characterized in that the connection elements (11-11 n ') arranged between two consecutive filter plates (6a, 6b) of the same filter module (8) consist of cable sections . Device according to claim 4, characterized in that the cable sections have the same length, determining a constant separation between consecutive filter plates (6a, 6b) of the same filter module (8) when the device adopts the opening position . Device according to any of the preceding claims, characterized in that the filter plates (6) have a plurality of cavities (12) and manifolds (13) configured so that when the device is in the closed position, the liquid to be filtered introduced at a certain pressure through the conduit (10) it crosses the mentioned cavities (12) where the solid residues contained in the liquid to be filtered are retained, passing the water to the collectors (13) that pour into a common gutter. 7. Device according to any of the preceding claims, characterized in that the filter plates (6) are lined with a filter cloth.