RU59433U1 - FILTER PRESS - Google Patents

Abstract

The invention relates to the field of chemical engineering, namely to filter presses, and may find application in filtering industrial suspensions in the chemical and related industries. The basis of the invention is the task of creating a filter press with a multi-element screen, which provides reliable protection for people and industrial premises from the release of suspensions under pressure, without requiring the use of a large number of complex and labor-consuming assemblies and parts. The filter press contains a front 1 and a rear 2 racks, interconnected by an upper beam 3, on which filter plates 6 and a pressure plate 8 are suspended. The latter interacts with a plate clamping mechanism 9 mounted in the rear rack 2. On the filter plates 6 with sleeves 10, 11, 17 and bolts 12 are fixed plates of one of the embodiments 13, 14, 15 or 16. The plates 13, 15 are located at different distances, and the plate 16 is at an angle to the side surface of the filter press. The initial suspension is fed into a filter plate pack 6 precompressed by the clamping mechanism 9. The liquid phase passes through the filter baffles and is discharged from the filter press, and the filter cake gradually fills the space inside the filter plates 6. During the entire suspension separation cycle, the plates 13, 14 , 15, 16 are in the position when they are maximally shifted to each other and form a protective screen along the entire side surface of the filter press. After filtration is completed, the filter press is opened and the filter plates 6 are extended to unload the sludge. In this case, the protective plates 13, 14, 15, 16 are moved apart with these plates, without interfering with the removal of sediment, as well as the inspection and cleaning of the filter walls.

Description

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MIWB01D25 / 12 FILTER-PRESS

The invention relates to the field of chemical engineering, namely to filter presses, and may find application in filtering industrial suspensions in the chemical and related industries.

A known filter press comprising a front strut (thrust plate), a rear strut with a plate clamping mechanism, side longitudinal beams, a set of filter plates and a pressure plate located on said beams (see Kata-log "Filters for liquids" , part II, TSINTIHIMNEFTEMASH, Moscow, 1991, pp. 39-45).

The disadvantage of this design is that the time required to move the plates is too large due to the need to manually move the filter plates in the process of unloading the filtered sediment. The indicated time expenditures significantly affect the productivity of the filter press operating in periodic mode, since it drastically increases the duration of its auxiliary operations. In addition, during the operation of filter presses of this design, there is always a risk of fistula formation in the gaps between the plates, which can entail the overflow of maintenance personnel and filtered suspension located near the equipment. This drawback is particularly important when working with hot suspensions and / or containing acids, alkalis and other chemically aggressive substances.

A filter press is also known, which comprises a front rack with a thrust plate, a rear rack with a plate clamping mechanism, a set of filter plates located between the racks and a pressure plate, as well as longitudinal beams connecting the front and rear racks. At the same time, one of the beams located at the top serves to suspend a set of filter plates and a pressure plate and contains a mechanism for moving the filter plates, and the other two are located on the sides of the filter press in its lower part (see Germany patent for utility model No. 77 11 368, MKI B01D 25/12, publ. 26.07.79).

In the filter press of this design, the movement of the filter plates is carried out using a chain mechanism containing a certain amount (depending mainly on the size of the filter press and the total number

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filter plates included in it) hooks-hooks. At the beginning of the “sludge unloading” operation, the pressure plate is disengaged from the filter plate package, the chain of the indicated mechanism is set in motion, and hooks and hooks move the filter plates in series, unloading the sediment.

This design can significantly reduce the time of movement of the plates in the process of unloading sediment, and, therefore, significantly increase the productivity of the filter press. However, the issue of protecting personnel and neighboring equipment from suspension overflow is also not resolved here.

Closest to the claimed (prototype) is a filter press for filtering suspensions containing a frame with front and rear racks, a pressure plate mounted on the frame from the rear rack, a set of filter plates located vertically between the pressure plate and the front rack and equipped with a filter cloth from the drainage surfaces, a mechanism for moving the filter plates, including a drive for moving the pressure plate and restrictive bars movably mounted on the brackets of the filter plates r and ensure a predetermined gap between the plates when opening the filter press. In order to protect personnel and nearby equipment from spills with a suspension, the filter plates are provided with at least one side of the filter press with shutters vertically mounted in the plate brackets with the possibility of rotation around their longitudinal axes and forming a protective screen along the specified side sides of the filter press when it is closed. Moreover, each restrictive bar located on the side of the filter press equipped with leaflets is made of two links articulated to each other, mounted on the brackets of the filter plates with the possibility of rotation in the horizontal plane, and one of the links of each restrictive bar is in tight engagement with the corresponding sash, providing rotation of the latter when moving the filter plates (see RF patent No. 2 174 427, MKI ⁷ B01D 25/12, publ. 10.10.2001, bull. No. 28).

This design, in contrast to the previously considered, allows you to effectively protect the package of plates and completely solves the issue of protection against overflow with suspension. However, a significant disadvantage of the prototype is the too high complexity of its design, associated with the need to use a large number

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parts, the manufacture of which significantly increases the cost of the filter press. In addition, this design creates considerable laboriousness when replacing filter baffles mounted on filter plates, due to the need to disconnect and then connect the above links.

The basis of the invention is the task of creating a filter press with a multi-element screen that obscures the filter plates during their compression into a sealed bag and the subsequent filtering operation, and vice versa, provides access to these plates during unloading of sludge and regeneration of the filter walls, but at the same time it does not require the use of a large number of complex and labor-intensive units and parts in the manufacture and maintenance. On the one hand, this provides reliable protection of people and industrial premises from damage and contamination by emissions of a suspension under pressure during emergency depressurization of the filter press, and on the other hand, it does not interfere with any operations of the filtering cycle and does not increase the time required for auxiliary operations .

The problem is solved due to the fact that in the filter press for filtering suspensions containing a frame with front and rear struts, a pressure plate mounted on the frame from the side of the rear strut, a set of filter plates arranged vertically between the pressure plate and the front strut and equipped with a filter cloth on the drainage side, and the filter plates are provided with vertically mounted plates forming a protective screen along at least one side of the filter press when it is closed, the fur According to the invention, these plates are fixed to the filter plates rigidly and in a position in which their planes make an angle of 0-30 ° with the side surface of the filter press.

In one preferred embodiment of the invention, adjacent plates are arranged in parallel planes, spaced apart from the side surface of the filter press. Moreover, the angle between the plane of the plates and the lateral surface of the filter press is predominantly zero.

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In most cases, the implementation of the invention, the edges of each individual plate can be bent both towards the side surface of the filter press, and in opposite directions.

The supply of each filter plate with a rigidly fixed leaf allows simple means to form a continuous protective screen during the closing of the filter press (with the flaps located along its side surface) and at the same time provides unhindered access to the filter plates and filter baffles when opening the filter -press.

Placing adjacent plates in parallel planes, different from the side surface of the filter press, provides the possibility of overlapping gaps between the plates and helps to create more reliable protection against breakthroughs of the filtered liquid.

A more effective overlap of the gaps can be achieved through the use of plates with edges bent towards the side of the filter press

The execution of the lateral edges of the plates bent in opposite directions also creates a reliable closure of adjacent plates when closing the filter press and thereby provides a sufficient protective function of the screen they create. In this case, the plates themselves are positioned at an angle to the side surface of the plate package. This allows the edges of the plates of adjacent plates to overlap the joints of the latter, forming a kind of lock that can hold a stream of suspension in any direction during emergency depressurization of the filter press.

In the general case, the angle at which the plates (mainly with the edges bent in different directions) are located relative to the lateral surface of the filter press can vary over a fairly wide range. However, its increase over 30 ° leads to an excessive increase in metal consumption, as well as the transverse dimensions of the filter press, which is undesirable.

The invention is illustrated by the accompanying drawings, in which are shown:

FIG. 1 - the inventive filter press in the working position (all plates are compressed, flat plates form a continuous screen);

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FIG. 2 is a schematic plan view of the filter press of FIG. 1 with compressed plates and flat plates forming a continuous screen (enlarged);

FIG. 3 is the same as FIG. 2, but with spread plates;

FIG. 4 is a schematic plan view of the filter press of FIG. 1 with compressed plates and plates, one edge of which is bent towards the side surface of the filter press (enlarged);

FIG. 5 is the same as FIG. 4, but with spread plates;

FIG. 6 is a schematic plan view of the filter press of FIG. 1 with compressed plates and plates, both edges of which are bent towards the side surface of the filter press (enlarged);

FIG. 7 is the same as FIG. 6, but with spread plates;

Fig.8 is a schematic top view of the filter press of Fig.1 with compressed plates and plates, the edges of which are bent in opposite directions (enlarged);

Fig.9 is the same as Fig. 8, but with spread plates;

FIG. 10 - node mounting plate to the filter plate (section AA of Fig. 2).

The filter press contains (Fig. 1) the front 1 and rear 2 racks, interconnected by the upper beam 3 and the lower side ties 4. On the upper beam 3, using special brackets 5, filter plates 6 are suspended with their filter partitions (not shown in the drawings ), as well as on its own bracket 7, the pressure plate 8. The pressure plate 8 interacts with the clamping mechanism of the plates 9 mounted in the rear rack 2.

On the filter plates 6 with the help of the sleeves 10, 11 (Fig. 2, 3, 10) and bolts 12 (Fig. 10) flat plates 13 are fixed. Since the sleeves 10 and 11 (Fig. 2, 3) have different lengths, the plates 13 are located at different distances from the side surface of the filter press. In addition to a flat shape, it is also possible to produce plates with one (Fig. 4 and 5, pos. 14) or with both (Fig. 6 and 7, pos. 15) edges bent towards the side of the filter press, as well as with the edges bent in opposite directions (Fig.8, 9, pos. 16). In the latter case, the plates are located at an angle to the side surface of the filter press, and for them

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fasteners are applied bushings 17 provided with a beveled surface on the side of the attachment of the plates.

The filter press operates as follows.

The initial suspension is fed into a packet of filter plates 6. The liquid phase passes through the filtering partitions and is removed from the filter press, and the filtered precipitate gradually fills the space inside the filter plates 6. During the entire cycle of separation of the suspension plates 13 are in a position where they are maximally shifted to each other in the direction of the longitudinal axis of the filter press (Fig. 2). Due to the fact that their width exceeds the width of the filter plates, and the plates themselves are located in different planes, their edges overlap each other, forming a protective screen along the entire side surface of the filter press.

The same applies to the plates 14 (Fig. 4), 15 (Fig. 6) and 16 (Fig. 8). The presence of bent edges on these plates provides an increase in the protective properties of the specified screen.

After the cycle of separation of the phases of the initial suspension, the clamping mechanism 9 pushes the pressure plate 8 towards the rear rack 2 of the filter press. Then begins the operation of unloading the sediment, in which the filter plates 6 are moved apart by a special mechanism or manually. In this case, the protective plates 13, which are rigidly fixed on the plates 6, are moved away together with these plates, as shown in FIG. 3, and do not interfere with the removal of sludge, as well as the inspection and cleaning of the filter walls.

The process of sliding the protective screen for cases of use of the plates 14 (Fig. 5), 15 (Fig. 7) and 16 (Fig. 9) is similar to that described above for a flat plate 13.

An exemplary design of the inventive filter press in which filter plates are suspended from a bridge is only one possible embodiment of the invention. In practice, the invention can also be used in filter presses with side suspension plates. The essence of the invention lies in the fact that when compressed into a package of filter plates, the plates always form a protective screen, and when the filter press is opened, access to the filter plates is opened.

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The invention can be applied in the above and similar designs of filter presses also in cases where the latter provides for the forced discharge of sediment using various discharge devices (see, for example, RF patent No. 2104 742, MKI ⁶ B01D 25/12, publ. . 02.20.1998, bull. No. 5).

If necessary, a protective screen of plates 13 or their modifications 14, 15, 16 can be located on both sides of the filter press.

The inventive design provides reliable protection for staff, equipment and industrial premises from suspension emissions during emergency depressurization of the filter press and will be widely used in the most various chemical and related industries.

BUT

Applicants: /! Ф ^^ Г ~ V.S. Moiseev V.A. Chernikov

1. A filter press for filtering suspensions, comprising a frame with front and rear struts, a pressure plate mounted on the frame from the side of the rear rack, a set of filter plates located vertically between the pressure plate and the front rack and equipped with a filter cloth on the drainage side, with this filter plates are provided with vertically mounted plates forming the shield along at least one side of the filter press when closed, a mechanism for moving the filter plates, tlichayuschiysya in that said plates are fixed to the filter plates and fixedly at a position at which they make with the plane of the side surface of the filter press angle of 0-30 °.

2. The filter press according to claim 1, characterized in that the adjacent plates

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placed in parallel planes, different from the side surface of the filter press.

3. Filter press according to paragraphs. 1 or 2, characterized in that the edges of the plates are bent toward the side surface of the filter press.

4. Filter press according to paragraphs. 1 or 2, characterized in that the edges of the plates are bent in opposite directions.

Applicants: // QM ^] "^ \ tabV. S. Moiseev

V.A. Chernikov

ESSAY

Filter press

The invention relates to the field of chemical engineering, namely to filter presses, and can find application in filtering industrial suspensions in the chemical and related industries. The basis of the invention is the task of creating a filter press with a multi-element screen, which provides reliable protection for people and industrial premises from the release of suspensions under pressure, without requiring the use of a large number of complex and labor-intensive components and parts in the manufacture and maintenance. The filter press contains a front 1 and a rear 2 racks, interconnected by an upper beam 3, on which filter plates 6 and a pressure plate 8 are suspended. The latter interacts with a plate clamping mechanism 9 mounted in the rear rack 2. On the filter plates 6 with sleeves 10, 11, 17 and bolts 12, the plates of one of the embodiments 13, 14, 15 or 16 are fixed. The plates 13, 15 are located at different distances, and the plates 16 are at an angle to the side surface of the filter press. The initial suspension is fed into a filter plate pack 6 precompressed by the clamping mechanism 9. The liquid phase passes through the filter baffles and is discharged from the filter press, and the filter cake gradually fills the space inside the filter plates 6. During the entire suspension separation cycle, the plates 13, 14 , 15, 16 are in the position when they are maximally shifted to each other and form a protective screen along the entire side surface of the filter press. After filtration is completed, the filter press is opened and the filter plates 6 are extended to unload the sludge. In this case, the protective plates 13, 14, 15, 16 are moved apart with these plates, without interfering with the removal of sediment, as well as the inspection and cleaning of the filter walls. 1 sec and 3 z.p. f-ly, 10 ill.

Claims (4)

1. A filter press for filtering suspensions, comprising a frame with front and rear struts, a pressure plate mounted on the frame from the side of the rear rack, a set of filter plates located vertically between the pressure plate and the front rack and equipped with a filter cloth on the drainage side, with the filter plates are provided with vertically mounted plates forming a protective screen along at least one side of the filter press when it is closed, a mechanism for moving the filter plates, tlichayuschiysya in that said plates are fixed to the filter plates and fixedly at a position at which they make with the plane of the side surface of the filter press angle of 0 ÷ 30 °. 2. The filter press according to claim 1, characterized in that the adjacent plates are placed in parallel planes, spaced apart from the side surface of the filter press. 3. The filter press according to claim 1 or 2, characterized in that the edges of the plates are bent towards the side surface of the filter press. 4. The filter press according to claim 1 or 2, characterized in that the edges of the plates are bent in opposite directions.