RU19366U1 - FILTER PRESS - Google Patents

Description

The utility model relates to the field of chemical engineering, namely to filter nresses for filtering industrial suspensions and can be used for dewatering sewage sludge and other liquid heterogeneous systems in chemical and related industries.

A filter press is known, which comprises a front strut with a thrust plate, a rear strut with a plate clamping mechanism, a set of filter plates located between the racks and a pressure plate, as well as connecting the front and rear struts with longitudinal beams. At the same time, one of the beams, sized 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).

The movement of the filter plates in the specified filter press is carried out using a chain mechanism containing a certain amount (depending mainly on the size of the filter press and the total number of filter plates included in it) hooks. At the beginning of the operation, the sludge is unloaded, the pressure plate is removed from the filter plate package, the chain of the indicated mechanism is set in motion, and hooks-hooks move the filter plates in series, performing the sludge unloading operation.

Among the disadvantages of this design, significant losses in the performance of the filter press can be noted, especially when filtering easily and medium-filtered suspensions, since it takes a lot of time to open all the filter plates. Another significant drawback is the lack of any protection against emissions of the suspension, which is under high pressure, during emergency depressurization of the filter plate package during filtering, washing and drying of the cake, etc.

MKIbv01V25 / 12 Filter press

Closest to the claimed (prototype) is a filter press containing front and rear struts, interconnected by an upper beam and lower side ties. A set of filter plates and a pressure plate interacting with the clamping mechanism are placed on the upper beam between these racks. The filter plates are equipped with filter baffles and are suspended on the upper beam using brackets. Moreover, these plates are interconnected by restrictive strips made of two articulated interconnected links, and are equipped with sashes vertically mounted in the brackets of the plates with the possibility of rotation around their longitudinal axes (see RF application. No. 2000115210/12 (015989) from 13.06 .2000 for the invention of "Filter Press).

During operation of the specified filter press, the initial suspension is fed into a packet of filter plates compressed by a clamping mechanism. The liquid phase passes through the filter walls, and the filtered precipitate fills the space inside the filter plates. During the filtering cycle, the flaps are deployed to the working position and form a protective screen along the entire side surface of the filter press. After filtering is completed, the pressure plate is moved by the plate clamping mechanism towards the rear rack. The filtered precipitate falls into the resulting gaps between the plates. By the moment the pressure plate stops at the rear rack, all filter plates are spread apart, and all the flaps are turned into an inoperative position, providing access to the filter plates.

This design, unlike the previous one, allows you to effectively unload the sediment from the filter press of large unit capacity, simplifies the unloading process and significantly reduces the time required for this operation. In addition, the filter press is protected on the side of the side surfaces from emissions of a suspension under high pressure during emergency depressurization of the filter plate pack during filtering and other technological operations. All this creates the necessary conditions for the operation of the filter press with the highest possible productivity and ensures the safe work of service personnel on it.

However, a significant disadvantage of the prototype is the lack of any protection against accidental emissions of the suspension from the upper ends of the filter plates. In addition, during the washing of the filter cloth, the high-pressure wash liquid can freely pass through the upper gaps between the filter plates, which impairs its collection after washing and creates additional problems with equipment and cleaning of production facilities.

The utility model is based on the task of creating a filter press design that prevents accidental emissions of the suspension through the upper gaps between the filter plates and improves the regeneration conditions of the filter fabric by supplying the latter with an upper protective screen. This provides more reliable protection for equipment and maintenance personnel, and also reduces the loss of flushing fluid.

The problem is solved due to the fact that 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 rack and interacting with its movement mechanism, 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, the mechanism for moving the filter plates, according to the utility model, is equipped with protection from the upper ends of the filter plates suspension emissions, made in the form of a series of baffle plates mounted mainly horizontally on brackets that are mounted on these filter plates, while the edges of adjacent baffle plates overlap each other at least when the filter press is closed.

In a preferred embodiment of the utility model, portions of the baffle plates adjacent to the free edges of the latter are bent toward the filter plates. In this case, the free edges of the baffle plates themselves are bent down.

a protective screen during the closing of the filter press, as well as during the regeneration of the filter cloth.

The bending of sections of the baffle plates adjacent to their free edges towards the filter plates ensures unobstructed overlapping of the edges of adjacent baffle plates.

Bending the free edges of the baffle plates down further enhances the protective properties of the upper screen.

The utility model is illustrated by the accompanying drawings, which depict:

figure 1 is a side view of the inventive filter press in the working position (all

plates are compressed);

figure 2 - remote element A figL (increased);

FIG. 3 is a schematic top view of the filter press of FIG. 1 with compressed plates (enlarged); FIG. 4 is a schematic side view of the top of the filter bag

plates with extended plates (increased); FIG. 5 is a view of the upper part of the working surface of the filter plate

with a baffle plate fixed to the bracket (increased). Fig.6 section along B - B of Fig.5;

The filter press contains a front 1 and a rear 2 racks (Fig. 1), interconnected by an upper beam 3 and 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 plate clamping mechanism 9 mounted in the rear rack 2. The filter plates 6 are connected to each other, and the extreme ones are also connected to the front column 1 and the pressure plate 8 , restrictive strips made in the form of two pivotally interconnected links 10, 11 (Fig. 3). The indicated links 10, And are mounted on the brackets 5 of the filter plates 6 with the possibility of rotation in the horizontal plane. The inner ends of the links 10 are rigidly connected to the upper axes 12 of the vertical shields. 0 y 4

sash 13. At both ends of each link 11 made limiters rotation of the links 14.

On the brackets 5 of the filter plates 6 (FIGS. 2, 4), the baffle plates 17 are also fixed with bolts 15 and nuts 16 (FIGS. 5, 6). The sections 18 of the baffle plates 17 adjacent to their free edges 19 are bent towards the filter plates 6. The free edges 19 of the baffle plates 17 themselves are bent down, and the fixed edges 20 are upward (FIGS. 2, 4-6).

The filter press operates as follows.

The initial suspension is fed into a packet of filter plates 6. The liquid phase passes through the filter baffles and is removed from the filter press, and the filtered precipitate gradually fills the space inside the filter plates 6. During the entire suspension separation cycle, the links 10, 11 are in a folded position, while fastened with the links 10 of the sash 13 are rotated in such a way that they form a protective screen along the entire side surface of the filter press (figure 1). At the same time, the baffle plates 17, pairwise overlapping each other with respectively free and fixed edges 19, 20 (Fig. 2), create the upper protective screen (Fig. 3) and thus exclude the emission of suspension through the upper ends of the filter plates 6 during emergency depressurization filter press.

After the end of the phase separation cycle of the initial suspension, the clamping mechanism 9 moves the pressure plate 8 towards the rear pillar 2 of the filter press. At the same time, the links 10 and 11 of each restrictive plate of the filter plates 6 are rotated relative to each other until the link 10 abuts against the rotation limiter 14 (Fig. 3). The filtered precipitate (not shown in the drawings) falls under its own weight into the gaps formed between the filter plates 6.

By the time of stopping the pressure plate 8 at the rear rack 2, all filter plates 6 are spaced at the same distance relative to each other (Fig. 4), the filtered precipitate is completely unloaded, and all side protective flaps 13 are turned into the inoperative position.

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As for the baffle plates 17, they, having moved together with the filter plates 6 during the opening of the filter press, continue to create an upper protective screen, since the edges 19, 20 of the adjacent baffle plates still overlap (Fig. 4). This makes it possible to regenerate the filter fabric without penetration of the washing liquid through the upper gaps between the filter plates 6.

If necessary, start a new filtration cycle, the clamping mechanism 9 moves the pressure plate 8 away from the rear rack 2, collecting all the filter plates 6 in one package. This causes the folding of the links 10, 11 of the restrictive straps of the filter plates 6. In this case, the rotation of the links 10 puts the protective flaps 13 into the working position, in which they again form a protective screen along the entire side surface of the filter press (Fig. 1). At the same time, the fender plates 17, overlapping each other with the edges 19, 20, again create a reliable upper protective shield (Fig.2, 3).

An example of the design of the inventive filter press, in which the sludge is unloaded from all filter plates while moving the pressure plate to the rear rack, is just one of the possible options for implementing the utility model. In practice, the utility model can be applied in various other designs of a filter press with a vertical arrangement of plates. In particular, it can be a filter press with sectional discharge of sediment, with side suspension of filter plates, with forced discharge of sediment, etc.

The inventive design, provides reliable protection for staff, equipment and production facilities from the upper emissions of the suspension during emergency depressurization of the filter press and improves the conditions of the regeneration process of the filter cloth.

Applicants: fCh1 (. S. Moiseev 6 (

Claims (3)

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 and interacting with the mechanism of its movement, a set of filter plates located vertically between the pressure plate and the front rack and provided from the side drainage surfaces of the filter cloth, the mechanism for moving the filter plates, characterized in that it is provided on the upper ends of the filter plates with means for protecting against suspension emissions, made in in the form of a series of baffle plates mounted mainly horizontally on brackets that are mounted on said filter plates, while the edges of adjacent baffle plates overlap each other at least when the filter press is closed.  2. The filter press according to claim 1, characterized in that the sections of the baffle plates adjacent to the free edges of the latter are bent towards the filter plates. 3. Filter press according to paragraphs. 1 and 2, characterized in that the free edges of the baffle plates are bent down.