ES2324380B1 - RESIDUAL WATER FILTER PROCESS IN THE PAPER INDUSTRY AND SIMILAR INDUSTRIES, CORRESPONDING FILTER AND INSTALLATION SYSTEM. - Google Patents

Abstract

Wastewater filtering process in the paper industry and similar industries, filtering apparatus e corresponding installation.

Different types of industries such as paper mill they have economic problems and space for the treatment of sewage, in addition to the resulting sludge.

The object of the invention is a process made in a filtering apparatus provided with a plurality of filter plates on which the paper fibers are deposited in suspension in the water to be processed, leaving the filtered water and Clean by the collector. This process includes the operations of filling of the device, recycling of process water, filtration, emptying of the filter at plate level, total emptying of the filter, drying the paper cake, and then the opening of the apparatus to remove the filter plate assembly, and said set is vibrated to separate the paper cakes.

Description

Wastewater filtering process in the paper industry and similar industries, filtering apparatus e corresponding installation.

Object of the invention

The present invention aims at a wastewater filtering process in the paper industry and similar industries, filtering and installation apparatus corresponding, to carry out the process.

Field of the Invention

The present invention aims at filtration of wastewater resulting from the processes carried out in the paper industry, and similar industries, covering a very wide range of various processes of different industries technically in which the liquid -de any nature - carries suspended particles.

Therefore, the field of action of the The present invention is very broad, since to carry out the sewage treatment of multiple industries, it require treatment plants that retain suspended particles and release filtered and clean water, which can be reused pouring it back into the riverbed or the sea directly or be used again in the plant itself.

Background of the invention

The aforementioned facilities are very expensive, they require a lot of land and investments, and that in many cases require a treatment of the resulting sludge, all this without taking into account the possible polluting elements They can present.

The above is applicable to countless industries, and of course the paper industry to which it is especially intended the present invention, but which serves as example to be applied to any industry with problems Similar.

The applicant is the holder of the Utility Model  No. U 200401082 relating to a filtering equipment, which is specially designed to filter oils edibles, fats and the like of refinery and oil mills, and for the wine industry, among others.

The degree of filtering of edible oils achieved with such filtering equipment, encouraged the applicant to improve the aforementioned equipment and that would be applicable to water filtration residuals of industries, such as the wastebasket among others, that always  has had the problem described above to require some large and expensive facilities, and with the added problem of sludge treatment resulting from the process.

The aforementioned problems presented by the paper industry and many other similar ones, have been totally eliminated by the present invention.

Summary of the invention

The present invention comprises a process of filtering of wastewater from the paper industry or any other similar, which is carried out in an apparatus of corresponding filtering and installation.

The present invention comprises a process of wastewater filtering in the paper industry and industries similar, by separating the suspended particles of the waters to be processed until reaching clean water to reuse, characterized in that it comprises the following operations:

a) filling the filter apparatus with water a  process, whose filtering apparatus consists of a body cylindrical provided with a plurality of filter plates that are connected inferiorly with a lower collector for the clean filtered water outlet,

b) recycling of the process water that fills the filtering apparatus and crosses the filter plates forming on them a paper fiber prelayer, in its descent towards the collector through which filtered water begins to flow out clean,

c) filtration, the deposition of the paper fiber suspended in the process water, on the filter plates, obtaining a layer called cake, which It can be more or less thick depending on the process, and at the same time the filtered and clean water is recovered for reuse or drain, this operation ends when the end of filtration, which varies according to the process, thickness of desired cake and also the shapes that you want the present to present cake, depending on the configuration of the filter plates,

d) emptying the filter to the level of plates, it consists of emptying the process water that is inside the device of filtering to the lower level of the filtering plates, almost up to the collector level, applying pressurized air superiorly, and the entry of process water into the filtering apparatus,

e) total emptying of the filter, consists of emptying all remaining process water contained in the appliance filtered, applying pressurized air superiorly, which is perform until no water comes out and only air comes out,

f) drying the paper cake, consists of dry the paper fiber cake supported and supported on the plates filtering, applying steam under pressure (and temperature) superiorly, after the application of pressurized air the cake resulting has the form of the filter plate, a thickness according to process time and process water conditions, all this until the cake has dried for reuse and even as a finished product,

g) opening of the filtering apparatus, consists of  decompress (remove pressure) the filter apparatus, open the cover, remove the plate assembly outside the device Filters with dry paper cakes attached to them, Y

h) vibration and recovery of paper cake  dry, after removing the filter plate assembly with the dry paper cakes, the plates are vibrated to peel the dried paper cakes from the plates of filtered, once the dried paper cakes are separated and recovered a complete cycle of the process and operation of the filtering apparatus

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The wastewater filtering process In the manufacture of the paper of the invention, it achieves two objectives important: on the one hand, recover the fibers or pulp in wastewater suspension of papermaking, and on the other, it recovers filtered and clean water from these waters residual

Fibers or paper pulp in suspension recovered can be recycled in the manufacturing process of the paper, or mainly can be used as a product finished, in the form of dry paper cakes in multiple applications as a protector in packaging, such as in packaging and  general transport of all types of electrical appliances and electronics, appliances, and in general, and also as soundproofing and insulating material.

For its part, filtered and clean water can be recycled in the papermaking itself, or you can drain to the river, the sea and for many uses such as irrigation and others.

According to the invention, the filling operations, recycle, filtration, filter drain to plate level, total emptying of the filter and drying of the paper cake, are carried to out in the filtering apparatus that is communicated by a installation of pipes, which are provided with valves and others components, with a process water inlet tank to process and with energy sources based on air and steam under pressure, and the opening operations of the filtering apparatus and of Vibration and recovery of dry paper cake, are made by hydraulic means and vibrators that are provided in your set the filter apparatus.

According to the present invention, the operations indicated are carried out by manipulating a series of valves and actuator means provided in the installation of planned pipes between the device and a process water inlet tank a process and external pressurized air and steam power means, which is described in the detailed description below.

The present invention also comprises a filtering apparatus to carry out the described process that it consists of a cylindrical body of concave bases of which one is the access cover, and that is positioned with the shaft main horizontal, and comprises a plurality of plates essentially vertical positioned filters that are supported superiorly by a longitudinal support and that inferiorly they are supported and in communication with at least one lower manifold through which filtered and clean water comes out, whose device is provided with at least one double input of the dirty water to be processed and superiorly of several air and steam pressurized inlets / outlets, deaerate or outlet of air, and features temperature probe type measuring means, pressure gauge, pressure switch, pressure transmitter, vibrator, valve Security and the like. The set of filter plates together with The access cover can be moved outside the device by means of hydraulic sliding means integral to the device positioned superiorly to separate paper cakes.

The invention is completed with an installation that  It comprises at least one process water tank in which introduces the water to be processed and that is provided with a stirrer, between whose apparatus and the tank are arranged a series of pipes incorporating valves, sight glasses, sampler, valve of safety and the like, whose pipes correspond to filling of the filter, total filter drain, deaerate, air inlet to pressure, pressure steam inlet, recycle between the manifold and the tank, drying the paper cake, emptying at the level of plates / filtered water outlet between the collector outlet and the Deposit.

These and other features will come off better than the detailed description that follows, to facilitate which It is accompanied by a sheet of drawings in which it has been represented a case study that is cited only by way of non-limiting example of the scope of the present invention.

Description of the drawings

In the drawings:

Figure 1 represents a general scheme of process, with the device and the installation for its execution.

Figure 2 is a side elevation view that illustrates the filtering apparatus and the displacement means of the set of filter plates, before removing the set of plates.

Figure 3 is a view similar to Figure 2 After removing the plate assembly.

Figure 4 is an end view of the apparatus considered by the end corresponding to the lid and the means of displacement.

Figure 5 is a detail of the closing wedges  from the lid to the body of the device.

Detailed description of an embodiment favorite

In accordance with the drawings, the process of wastewater filtering in the paper industry and industries of the present invention, illustrated in Figure 1, It includes the following operations:

a) filling the filter apparatus with water a  process, whose filtering apparatus consists of a body cylindrical provided with a plurality of filter plates that are connected inferiorly with at least one lower manifold for the exit of clean filtered water,

b) recycling of the process water that fills the filtering apparatus and crosses the filter plates forming on them a prelayer of fiber or paper pulp, in its descent to the collector through which water begins to flow out filtered clean,

c) filtration, the deposition of the paper fiber suspended in the process water, on the plates filtering, obtaining a layer called cake, which can be more or less thick depending on the process, and at the same time recover the filtered and clean water for reuse or drain, this operation ends when the end of the filtration, which varies according to the process, desired cake thickness and also the forms that you want the cake to present, depending on of the configuration of the filter plates,

d) emptying the filter to the level of plates, it consists of emptying the process water that is inside the device of filtering to the lower level of the filtering plates, almost up to the collector level, applying pressurized air superiorly, and the entry of process water into the filtering apparatus,

e) total emptying of the filter, consists of emptying all remaining process water contained in the appliance filtered, applying pressurized air superiorly, which is perform until no water comes out and only air comes out,

f) drying the paper cake, consists of dry the paper fiber cake supported and supported on the plates filtering, applying steam under pressure (and temperature) superiorly, after the application of pressurized air, the resulting cake has the shape of the filter plate, a thickness according to the process time and process water conditions, all this until the cake has dried for reuse and even as a finished product,

g) opening of the filtering apparatus, consists of  decompress (remove pressure) the filter apparatus, open the cover, remove the plate assembly outside the device Filters with dry paper cakes attached to them, Y

h) vibration and recovery of paper cake  dry, after removing the filter plate assembly with the dry paper cakes, the plates are vibrated to peel the dried paper cakes from the plates of filtered, once the dried paper cakes are separated and recovered a complete cycle of the process and operation of the filtering apparatus

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According to the present invention, the operations indicated are carried out by manipulating a series of valves and actuator means provided in the installation of planned pipes between the device and at least one water inlet tank process to process and means of energy of air and steam under pressure exteriors so that:

a) Filling the filter apparatus with the dirty water to be processed is made by opening the valve (V1) to the lower outlet of the process water tank (DAP) that receives the water to be processed, and the valve (V2) to the lower inlet (1,1) double of the filtering apparatus, both valves being located and the process pump (BP), which also starts, in the pipe (T2) (filter fill) that communicates the output bottom of the tank with the device, and the valve is also opened of deaeration (V4) located superiorly in the filtering apparatus (AF) in the pipe (T4) (deaerating) that communicates the device with the upper part of the tank, which allows air to escape superior to the device and the process water inlet inferiorly to fill the device, and keeping closed the remaining valves of the pipes corresponding to (V3) in the pipe (T3) (total filter drain) between the inlet bottom (1, 1) of the device and the top of the tank, (V5) in the pipe (T5) (of air) that supplies the pressurized air, (V6) in the pipe (T6) (steam) that supplies the steam under pressure and temperature, (V7) in the pipe (T7) (recycle) that communicates the manifold (C) of the filter apparatus (AF) and the top of the water tank to be processed, (V8) in the pipe (T8) (drying of the paper cake) that communicates the recycle pipe (T7) in a point located before the valve (V7) and the top of the tank, and (V9) in the pipe (T9) (emptying at the level of plates / outlet filtered water) that communicates the pipe (T7) of I recycle at a point located before the valve (V7) and outside for reuse of filtered and clean outgoing water, during said operation the valves are maintained in the indicated position until water comes out of the snub pipe (T4) in which it is the corresponding valve (V4),

b) The recycling of the process water that fills completely the filtering apparatus, as described at the end of the previous filling operation, the valves are kept open (V1) of the tank (pipe T2) and the (V2) filter filling (T2 pipe), and the recycle valve (V7) (T6 pipe) is opened, and the deaeration valve (V4) is closed, the process pump (BP), similarly the closed ones are kept valves (V3) for total drain filter, (V5) for pressurized air, (V6)  Pressurized steam, (V8) drying paper cake and (V9) of the pipe (T8), with the aforementioned valve arrangement the water to process contained in the apparatus begins to pass through the plates filter (PF) of the apparatus forming on them a prelayer of fiber or pulp, which is enough for the collector and then by the recycle pipe (T6) start to leak filtered and clean water,

c) In the filtration, the deposition of the fiber or paper pulp suspended in the process water over the filter plates, obtaining the layer called cake, is operation is carried out by opening the outlet valve (V9) of filtered water (T9 pipe) and closing the recycle valve (V7) (T7 pipe), and keeping the outlet valves (V1) open of the reservoir and (V2) of filling the filter (pipe T2), being in start the process pump (BP), and keeping the valves (V3) for total drainage, (V4) for deaeration, (V5) for air at pressure, (V6) pressure steam and (V8) cake drying paper,

d) Emptying the filter to plate level it consists of emptying the process water, which is inside the device of filtering to the lower level of the filtering plates, almost up to the level of the collector (C), whose operation begins with the valves (V1) and (V2) open and the process pump (BP) running, and then the drain valve (V9) is opened at the level of plates (T9 pipe), the valves (V7) of recycle, (V3) of total emptying, (V4) of deaeration, (V6) of steam, and (V8) for drying the paper cake, the valve (V5) of pressurized air inlet keeping a minimum pressure constant 0.5 Bars and a maximum of 4 Bars, and the valves are closed (V1) and (V2), maintaining the air pressure and the position of the valves until air comes out of the drain pipe (T9) level of outdoor plates,

e) The total emptying of the filter consists of empty all the remaining process water contained in the appliance filtered, in whose operation the valves are kept open (V5) of air inlet and (V9) of emptying at plate level, and keep the valves (V1) and (V2) of the filter filling closed, (V3) total filter drain, (V4) deaeration, (V6) steam, (V7) of recycling and (V8) drying of the paper cake, and how it has been indicated, when air comes out of the drain pipe (V9) at level of plates, the valve (V3) for total emptying of the filter is opened and the close the valve (V9), and the pressure and position of the valves until air comes out of the drain pipe (T3) total filter,

f) Drying the paper cake consists of dry the paper fiber cake supported and supported on the plates filtering, applying steam under pressure (and temperature) superiorly after application of pressurized air, whose operation is performs by keeping the valves (V3) of total emptying open and (V5) air inlet, when air comes out of the pipe (T3) of Total emptying of the filter opens the valve (V8) of the pipe (T8) drying the paper cake and closing the valve (V3) of total drain of the filter, maintaining the air pressure of 0.5 to 4 bars, then the steam inlet valve (V6) is opened and the close the air inlet valve (V5), maintaining a pressure minimum steam of 0.480 bars (110ºC) and the position of the valves until the cake is considered to have dried, the Time of this operation depends on the cake conditions mainly,

g) The opening of the filtering apparatus consists of in decompressing (removing pressure) the filter apparatus, open the cover, remove the plate assembly outside the device Filters with dry paper cakes attached to them, said operation is performed by closing the steam valves (V6) and (V8) drying the paper cake, leaving a time between them actions, then the deaeration valve (V4) is opened to decompress the device and its interior is under pressure atmospheric, ensure there is no pressure inside the device checking pressure transmitter values (4), pressure gauge (6), etc., of the apparatus, after a time of about 20 seconds the lid (TA) is opened fully and the plate assembly is removed Filtering (PF) outside the filter, making said performances by convenient means especially hydraulic, Y

h) The vibration and recovery of the cake dry paper, after removing the set of plates filtered with dry paper cakes, the plates are subjected to vibration to separate and recover dry paper cakes, and it a complete process and operating cycle of the filtering apparatus

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The filtering process described in the invention achieve two goals, recover the fiber or pulp in suspension for reuse or as a finished product, and recover filtered and clean water from sewage paper manufacturing for recycling or drainage.

According to the invention, the filling operations, recycle, filtration, filter drain to plate level, total emptying of the filter and drying of the paper cake, are carried to out in the filtering apparatus that is communicated by a installation of pipes, which are provided with valves and others components, with a process water inlet tank to process and with energy sources based on air and steam under pressure, and the opening operations of the filtering apparatus and of Vibration and recovery of dry paper cake, are made by hydraulic means and vibrators that are provided in your set the filter apparatus.

The present invention comprises an apparatus of filtered to carry out the described process, which consists of a cylindrical body (A) of concave bases of which one is the access cover (TA) and which is essentially positioned horizontal, inside it comprises a plurality of plates essentially vertical positioned filters (PF) that are supported superiorly by a longitudinal support (SP) and that inferiorly they are supported and in communication with at least one lower manifold (C) through which filtered and clean water comes out, whose apparatus is provided with at least one input double (1, 1) of the dirty water to process and superiorly of several air and steam pressure inlets / outlets (3), deaerate or outlet air (5), and features temperature probe type measuring means (8), pressure gauge (6), pressure switch (7), pressure transmitter (4), vibrator (9), safety valve (10) at the outlet (5), sight glasses (11), samplers (12) and others.

The filter plate assembly (PF) with the upper support (SP) and manifold (C), together with the cover Access (TA) are movable outside the device by hydraulic sliding means (MD) integral with the apparatus and positioned superiorly.

The opening and closing of the lid (TA) of the body (A) of the device is carried out hydraulically by means of two opposite cylinders (CO) diametrically acting respective pairs of wedges (C1, C2), of the lid and body, facing and coupled that provide a total tightness when they are closed.

It should also be noted that the invention provides that the filter plates (PF) may be vertical or inclined, the filter apparatus can also be in any horizontal position -as illustrated-, vertical or inclined In addition, the invention provides that the apparatus comprises a collector - as illustrated - or several, which may be positioned parallel or crossed, whether orthogonal or not, of so that in the case of several collectors, the outputs of the they are coupled to a common connection element, which connect to the recycle pipe.

The invention also comprises an installation to carry out the filtering process, and comprises a deposit of process water (DAP), or several reservoirs, in which introduces the water to be processed and that is provided with a stirrer (AG), between whose apparatus and the tank are arranged a series of pipes incorporating valves, sight glasses, samplers, safety valve and the like, comprising: pipe (T2) of filling of the filter, between the input (1, 1) to the device and the output of the tank, which has a valve (V1) at the outlet of the tank, process pump (BP) and filling valve (V2); (T3) of total emptying of the filter, between the entrance to the device and the tank, which incorporates the valve (V3); (T4) to snub between upper part of the device and the tank and incorporates the valve (V4); (T5) pressurized air inlet with the valve (V5); (S6) pressurized steam inlet with the valve (V6); (T7) recycle between the manifold and the tank with the valve (V7); (T8) of drying the paper cake with the valve (V8) between the outlet of the collector before (V7) and deposit; and (T9) emptying at the level of plates / filtered water outlet with the valve (V9) between the outlet of the collector and the tank.

The invention, within its essentiality, can be put into practice in other embodiments that differ only in detail from that indicated solely by way of example, which will also achieve the protection that collect. This water filtration process can therefore be carried out residuals in the paper industry and similar industries, apparatus corresponding filtering and installation, with the means, most suitable components and accessories, being able to elements components be replaced by other technically equivalent ones, to be all included within the claims.

Claims (8)

1. Wastewater filtration process in the paper industry and similar industries, by separating the suspended particles from the waters to be processed until reaching clean water for reuse, characterized in that it comprises the following operations: a) filling the filter apparatus with water dirty to process, whose filtering apparatus consists of a body cylindrical provided with a plurality of filter plates that are connected inferiorly with a lower collector for the clean filtered water outlet, b) recycling of the process water that fills the filtering apparatus and crosses the filter plates forming on them a prelayer of fiber or paper pulp, in its descent to the collector through which water begins to flow out filtered clean, c) filtration, the deposition of the fiber or paper pulp suspended in the process water, about the filter plates, obtaining a layer called cake, which It can be more or less thick depending on the process, and at the same time the filtered and clean water is recovered for reuse or drain, this operation ends when the end of filtration, which varies according to the process, thickness of desired cake and also the shapes that you want the present to present cake, depending on the configuration of the filter plates, d) emptying the filter to the level of plates, it consists of emptying the process water that is inside the device of filtering to the lower level of the filtering plates, almost up to the collector level, applying pressurized air superiorly, and the entry of process water into the filtering apparatus, e) total emptying of the filter, consists of emptying all remaining process water contained in the appliance filtered, applying pressurized air superiorly, which is perform until no water comes out and only air comes out, f) drying the paper cake, consists of dry the fiber cake or paper pulp supported and supported by the filter plates, applying steam under pressure (and temperature) superiorly, after the application of pressurized air the cake resulting has the form of the filter plate, a thickness according to process time and process water conditions, all this until the cake has dried for reuse and even as a finished product, g) opening of the filtering apparatus, consists of  decompress (remove pressure) the filter apparatus, open the cover, remove the plate assembly outside the device Filters with dry paper cakes attached to them, Y h) vibration and recovery of paper cake  dry, after removing the filter plate assembly with the dry paper cakes, the plates are vibrated to peel the dried paper cakes from the plates of filtered, once the dried paper cakes are separated and recovered a complete cycle of the process and operation of the filtering apparatus, whose process applied to wastewater from papermaking recovers the fibers or pulp in suspension for reuse and / or as a finished product and recover filtered and clean water for recycling in the manufacture of paper and / or its drainage, and in its application to sewage from similar industries recovers as cakes the corresponding suspended particles and the filtered water and clean.

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2. Filtering process according to claim 1, characterized in that the indicated operations are carried out by manipulating a series of valves and actuator means provided in the installation of pipes provided between the apparatus and a process water inlet tank to be processed and Outside air and steam pressure energy means: a) Filling the filter apparatus with the dirty water to be processed, is done by opening the valve (V1) to the lower outlet of the process water tank (DAP) that receives the water to be processed, and the valve (V2) to the lower inlet (1, 1) double of the filtering apparatus, both valves being located and the process pump (BP), which also starts, in the pipe (T2) (filter fill) that communicates the bottom outlet of the tank with the device, and the valve of deaerate (V4) located superiorly in the filtering apparatus (AF) in the pipe (T4) (deaerating) that connects the device with the upper part of the tank, which allows air to escape superior to the device and the process water inlet inferiorly to fill the device, and keeping closed the remaining valves of the pipes, corresponding to (V3) in the pipe (T3) (total filter drain) between the bottom inlet (1, 1) of the device and the top of the tank, (V5) in the pipe (T5) (air) that supplies the pressurized air, (V6) in the pipe (T6) (steam) that supplies the steam under pressure and temperature, (V7) in the pipe (T7) (recycle) that communicates the manifold (C) of the filter apparatus (AF) and the top of the water tank to be processed, (V8) in the pipe (T8) (drying of the paper cake) that communicates the recycle pipe (T7) in a point located before the valve (V7) and the top of the tank, and (V9) in the pipe (T9) (emptying at the level of plates / outlet filtered water) that communicates the pipe (T7) of I recycle at a point located before the valve (V7) and outside for reuse or drain of filtered and clean water outgoing, during said operation the valves are kept in the indicated position until water comes out of the deaeration pipe (T4) in which the corresponding valve (V4) is, b) The recycling of the process water that fills completely the filtering apparatus, as described at the end of the previous filling operation, the valves are kept open (V1) of the tank (pipe T2) and the (V2) filter filling (T2 pipe), and the recycle valve (V7) (T6 pipe) is opened, and the deaeration valve (V4) is closed, the process pump (BP), similarly the closed ones are kept valves (V3) for total drain of the filter, (V5) for pressurized air, (V6) pressurized steam, (V8) drying the paper cake and (V9) of the pipe (T8), with said valve arrangement the water to process contained in the apparatus begins to pass through the plates filter (PF) of the apparatus forming on them a prelayer of paper fiber, which is enough for the collector and to then through the recycle pipe (T6) start to drain water filtered and clean, c) In the filtration, the deposition of the paper fiber suspended in the process water on the filter plates, obtaining the layer called cake, this operation is carried out by opening the outlet valve (V9) of filtered water (T9 pipe) and closing the recycle valve (V7) (T7 pipe), and keeping the outlet valves (V1) open of the reservoir and (V2) of filling the filter (pipe T2), being in start the process pump (BP), and keeping the valves (V3) for total drainage, (V4) for deaeration, (V5) for air at pressure, (V6) steam pressure and (V8) cake drying paper, d) Emptying the filter to the level of plates, consists of emptying the process water that is inside the filter apparatus to the lower level of the plates filtered, almost to the level of the collector, whose operation begins with valves (V1) and (V2) open and the process pump (BP) running, and then the drain valve (V9) is opened to plate level (T9 pipe), the valves are kept closed (V7) of recycling, (V3) of total emptying, (V4) of deaeration, (V6) of steam, and (V8) drying the paper cake, the valve opens (V5) pressurized air inlet keeping a constant pressure minimum of 0.5 Bars and a maximum of 4 Bars, and the valves (V1) and (V2), maintaining air pressure and position of the valves until air comes out of the drain pipe (T9) at the level of outdoor plates, e) The total emptying of the filter consists of empty all the remaining process water contained in the appliance filtered, in whose operation the valves are kept open (V5) of air inlet and (V9) of emptying at plate level, and keep the valves (V1) and (V2) of the filter filling closed, (V3) total drain of the filter, (V4) of deaeration, (V6) of steam, (V7) of recycling and (V8) of drying the paper cake, and how it has been  indicated, when air comes out of the drain pipe (V9) at level of plates, the valve (V3) for total emptying of the filter is opened and the close the valve (V9), and the pressure and position of the valves until air comes out of the drain pipe (T3) total filter, f) The drying of the paper cake consists of dry the paper fiber cake supported and supported on the plates filtering, applying steam under pressure (and temperature) superiorly, after the application of pressurized air, whose operation is performed by keeping the valves (V3) of total emptying and (V5) of air inlet, when air comes out of the Total drain pipe (T3) filter opens valve (V8) the pipe (T8) drying paper cake and the valve is closed (V3) of total filter drain, maintaining the air pressure of  0.5 to 4 bars, then the steam inlet valve opens (V6) and the air inlet valve (V5) is closed, keeping a minimum vapor pressure of 0.480 bars (110 ° C) and the position of the valves until the cake is considered to have dried, the Time of this operation depends on the cake conditions mainly, g) The opening of the filtering apparatus consists of  to decompress (remove pressure) from the filter apparatus, open the cover, take the plate assembly out of the device Filters with dry paper cakes attached to them, said operation is performed by closing the steam valves (V6) and (V8) drying the paper cake, leaving a time between them actions, then the deaeration valve (V4) is opened to decompress the device and its interior is under pressure atmospheric, ensure there is no pressure inside the device checking pressure transmitter values (4), pressure gauge (6), etc., of the apparatus, after a time of about 20 seconds the lid (TA) is opened fully and the plate assembly is removed Filtering (PF) outside the filter, making said performances by convenient means especially hydraulic, Y h) The vibration and recovery of the cake dry paper, after removing the set of plates filtered with dry paper cakes, the plates are subjected to vibration to separate and recover dry paper cakes, and it a complete process and operating cycle of the filtering apparatus

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3. Filtering process according to claims 1 and 2, characterized in that the operations of filling, recycling, filtration, emptying of the filter to the level of plates, total emptying of the filter and drying of the paper cake, are carried out in the filtering apparatus that is connected, through an installation of pipes that are provided with valves and other components, with an inlet tank for the process water to be processed and with energy sources based on air and steam under pressure, and because Opening operations of the filtering and vibration apparatus and recovery of the dry paper cake are carried out by hydraulic and vibrating means that the filtering apparatus is provided as a whole. 4. Filtering apparatus for carrying out the process of claims 1 to 3, comprising a plurality of filter plates on which the suspended particles are deposited in cakes in the liquid to be processed, which once filtered is collects at least one lower manifold on which the plates are supported and / or communicated, characterized in that it consists of a cylindrical body (A) of concave bases of which one is the access cover (TA) and which is essentially horizontally positioned , which comprises a plurality of essentially vertical filter plates (PF) that are supported superiorly by a longitudinal support (SP) and that are inferiorly supported and in communication with at least one lower manifold (C) from which the filtered water comes out and clean, and which is provided with at least one double inlet (1, 1) of the dirty water to be processed and superiorly with several air / steam inlets / outlets (3), dea ire or air outlet (5), and features measuring means such as temperature probe (8), pressure gauge (6), pressure switch (7), pressure transmitter (4), vibrator (9), safety valve (10) in the exit (5), peepholes (11), samplers (12) and others. 5. Filtering apparatus according to claim 4, characterized in that the set of filter plates (PF) with the upper support (SP) and the manifold (C), together with the access cover (TA) are movable outside the apparatus (AF) by hydraulic sliding means (MD) integral with the apparatus positioned superiorly. 6. Filtering apparatus according to claims 4 and 5, characterized in that the opening and closing of the cover (TA) with respect to the body (A) of the apparatus (AF) is carried out hydraulically by means of two diametrically opposed diametrically acting cylinders (CO) pairs of wedges (C1, C2) of lid (TA) and body (A) facing and coupled which provide a total seal when closed. 7. Filtering apparatus according to claims 4 to 6, characterized in that the filtering plates (PF) are preferably fifteen, and are vertical, and if necessary inclined, because the various manifolds are arranged essentially parallel and / or crossed in orthogonal position, and where appropriate forming an angle, whose outlets are communicated by a connection element that joins the recycle pipe, and because the apparatus adopts any convenient horizontal and vertical and inclined position. 8. Installation of dirty water process in the paper industry by means of the apparatus of claims 4 to 7 for carrying out the filtering process of claims 1 to 3, characterized in that it comprises at least one process water tank (DAP) in which the water to be processed is introduced which is provided with an agitator (AG), between whose apparatus (AF) and the reservoir (DAP) a series of pipes are disposed incorporating valves, sight glasses, samplers, and the like, which comprise : filter filling pipe (T2), between the inlet (1, 1) to the device and the tank outlet, which has a valve (V1) at the tank outlet, the process pump (BP) and the valve ( V2) filling; (T3) of total emptying of the filter, between the inlet to the device and the tank, incorporates the valve (V3); (T4) of deaerating between the upper part of the apparatus and the tank and incorporates the valve (V4); (T5) pressurized air inlet with the valve (V5); (T6) pressurized steam inlet with the valve (V6); (T7) of recycling between the collector and the tank with the valve (V7); (T8) Drying the paper cake with the valve (V8) between the collector outlet before (V7) and the tank; and (T9) of emptying at the level of plates / outlet of filtered water with the valve (V9) between the outlet of the collector and the tank before (V7).