UA23603U - Filtering press - Google Patents

Abstract

A filtering press for filtration of suspensions contains a frame with front and rear posts, a pressure plate installed on the frame from the side of the rear post, a set of filter plates arranged vertically between the pressure plate and front post and equipped from the side of drainage surfaces with filtering cloth, a mechanism of displacement of filter plates. The filter plates are equipped with vertically located plates, which form protective shield along, at least, one side of the filter press at its closing. Said plates are rigidly fixed on the filter plates in position, at which their planes make with the side of filter press the angle of 0-30 DEGREE .

Description

Description of the invention

The useful model refers to the field of chemical engineering, namely to filter presses. and can find 2 applications in the filtration of industrial suspensions in the chemical and related industries.

A known filter press containing a front riser (thrust plate), a rear riser with a plate clamping mechanism, side longitudinal beams, a set of filter plates and a pressure plate placed on the specified beams |see

Catalog "Filter! for liquids". part II, TSYNTIKHIMNEFTEMASH, Moscow, 1991, pp. 39-45).

The disadvantage of this design is that it takes too much time to move the plates, associated with the need to manually move the filter plates in the process of unloading the filtered sediment. The specified time costs significantly affect the performance of a filter press operating in periodic mode, because they dramatically increase the duration of its auxiliary operations. In addition, during the operation of filter presses of this design, there is always a danger of fistula formation in the gaps between the plates, which can cause service personnel and nearby equipment to be doused with the filterable suspension. This 12 disadvantage acquires special importance when working with hot suspensions and/or those containing acids, alkalis and other chemically aggressive substances.

Also known is a filter press containing a front riser with a thrust plate, a rear riser with a plate clamping mechanism, a set of filter plates, a pressure plate located between the risers, and longitudinal beams connecting the front and rear risers. At the same time, one of the beams located at the top is intended for suspension of a set of filter plates and a pressure plate and contains a mechanism for moving the filter plates, and the other two beams are located on the sides of the filter press in its lower part | see German utility model patent Mo7711368, MKV 8B01025/12, publ. 26.07.79).

In the filter press of this design, the filter plates are moved using a chain mechanism containing a certain number (which depends mainly on the size of the filter press and the total number of filter plates included in it) of hooks. At the beginning of the "sediment unloading" operation, the pressure plate is moved away from the package of filter plates, the chain of the specified mechanism is set in motion, and the hook-hooks successively move the filter plates, discharging the sediment.

Such a design allows to significantly reduce the time of moving the plates in the process of sediment discharge, and. therefore, significantly increase the performance of the filter press. However, the issue of protecting personnel and nearby equipment from being doused with suspension has not been resolved here either. at

The closest to the claimed (prototype) is a filter press for filtering suspensions, which contains a frame with front and rear risers, a pressure plate installed on the frame from the side of the rear riser, a set of filter plates located vertically between the pressure plate and the front riser and equipped with side "9 drainage surfaces with a filter fabric, a mechanism for moving the filter plates, which includes a drive 3o for moving the pressure plate and limiting bars, which are movably mounted on the brackets of the filter plates and provide a specified gap between the plates when the filter press is opened. In order to prevent personnel and adjacent equipment from being poured with suspension, the filter plates are equipped, at least on one side of the filter press, with flaps vertically installed in plate brackets with the possibility of rotation around their longitudinal axes and forming a protective screen along the specified side of the filter press when it From closing. At the same time, each limiting bar, located on the side of the filter press equipped with flaps, is dug from two hinged links, installed on filter plate brackets with the ability to rotate in the horizontal plane, and one of the links of each limiting bar is in a rigid engagement with the corresponding leaf, ensuring the rotation of the latter when moving the filter plates (see patent of Ukraine Mo52787, MKV" VO1025/12, publ. 15.01.2003. Bull. Moi) yuyu 395 This design, unlike the ones discussed earlier, allows you to effectively enclose the package plates and completely solves the issue of protection against suspension spillage. However, a significant drawback of the prototype is the too high (95) complexity of its design. It is associated with the need to use a large number of parts, the manufacture of which significantly increases the cost of the filter press. In addition, the considerable labor intensity created by this design when replacing filter partitions mounted on filter plates, ch erez the need for disconnection, and («c) 50 then connection of the links mentioned above. The useful model is based on the task of creating a filter press with a multi-element screen, which covers the filter plates during their compression into a hermetic bag and the subsequent filtering operation, and vice versa, opens access to the specified plates during sediment unloading and filter partition regeneration, but at the same time does not requires the use of a large number of complex and time-consuming to manufacture and 59 maintain components and parts. On the one hand, this provides reliable protection of people and production facilities from damage and contamination by emissions of 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 time spent on auxiliary operations.

The problem is solved thanks to the fact that in the filter press for filtering suspensions. containing a frame with a front 60 | rear risers, a pressure plate installed on the frame from the rear riser side, a set of filter plates located vertically between the pressure plate and the front riser and equipped with a filter fabric on the side of the drainage surfaces, while the filter plates are equipped with vertically installed plates that form a protective screen along, at least. on one side of the filter press when it is closed, the mechanism for moving the filter plates, according to the invention, the specified plates are fixed on the filter plates because rigidly and in a position in which their planes make an angle of 0-309 with the side surface of the filter press,

In one of the best versions of the invention, adjacent plates are placed in parallel planes, at different distances from the side surface of the filter press. At the same time, the angle between the plane of the plates and the side surface of the filter press is preferably zero.

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

Equipping each filter plate with a rigidly fixed plate makes it possible to easily form a solid protective screen when the filter press is closed (at the same time, the plates are located along its side surface) and at the same time provides unhindered access to the filter plates and 7/0 filter partitions when the filter press is opened.

Placement of adjacent plates in parallel planes, at different distances from the side surface of the filter press, provides the possibility of overlapping the gaps between the plates and contributes to the creation of more reliable protection against breakthroughs of the filtered liquid.

More effective overlapping of the gaps can be achieved due to the use of plates with edges, 7/5 Bent to the side of the side surface of the filter press.

Making the side edges of the plates bent in opposite directions also creates a reliable closing of the adjacent plates when the filter press is closed and thereby ensures a sufficient protective function of the screen they create. In this case, the plates themselves are placed at an angle to the side surface of the filter press. This allows the edges of the plates of neighboring plates to overlap the joints of the latter, forming a kind of lock, and is able to hold the stream of suspension in any direction during emergency depressurization of the filter press.

In the general case, the value of the angle at which the plates (mostly with edges bent in different directions) are located relative to the side surface of the filter press can vary within fairly wide limits. However, its increase over 302 leads to an excessive increase in metal capacity, as well as the transverse dimensions of the filter press, which is undesirable.

A useful model is illustrated by the accompanying drawings, which show:

Fig. 1 - the claimed filter press in the working position (all plates are compressed, flat plates form a solid screen);

Fig. 2 - a schematic top view of the filter press according to Fig. 1 (enlarged);

Fig. 3 is the same as Fig. 2, but with the plates spread apart; co

Fig. 4 is a schematic top view of the filter press according to Fig. 1 with compressed plates and plates, one edge of which is bent to the side of the side surface of the filter press (enlarged); at

Fig. 5 - the same as Fig. 4, but with spread plates; Gee)

Fig. 6 is a schematic top view of the filter press according to Fig. 1 with compressed plates and plates, both edges of which are bent to the side of the side surface of the filter press (enlarged): i.

Fig. 7 - the same as Fig. b, but with spread plates; Fig. 8 is a schematic top view of the filter press according to Fig. 1 with compressed plates and plates, the edges of which are bent in opposite directions (enlarged); Fig. 9 - the same as Fig. 8, but with spread plates;

Fig. 10 - plate attachment unit to the plate (section A-A Fig. 2) «

The filter press contains (Fig. 1) front 1 and rear 2 risers, connected to each other by the upper beam C and the lower 8 with side ties 4. Filter plates 6 and with their filter partitions (on drawings are not shown), as well as a pressure plate 8 on its own bracket 7. The pressure plate 8 interacts with the plate clamping mechanism 9 mounted in the rear riser 2.

Flat plates 13 are attached to the filter plates b using bushings 10, 11 (Fig. 2, C, 10) and bolts 12 (Fig. 10). Due to the fact that bushings 10 and 11 (Fig. 2, C) have a longer length , plates 13 are located at different distances from the side surface of the filter press. In addition to the flat shape, it is also possible to make plates with one (Fig.4 and 5, item 14) or both (Fig.b and 7, item 15) edges bent to the side of the side surface of the filter press, as well as with edges bent in opposite directions sides (Fig. 8, 9, item 16). In the latter case

Gee! the plates are located at an acute angle to the side surface of the filter press, and for their fastening, 5p Bushings 17 are used, which have a beveled surface on the side of the plate attachment. o The filter press works in the following way.

HC) The initial suspension is fed into a bag of filter plates 6 pre-compressed by means of a clamping mechanism 9. The liquid phase passes through (the filter partitions and is removed from the filter press, and the filtered sediment gradually fills the space inside the filter plates 6. During the entire suspension separation cycle, the plates 13 are in the position when 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 the width of the specified plates exceeds the width of the filter plates, and the plates themselves are located in different planes, Their edges overlap each other, forming a reliable protective screen along the entire side surface of the filter press.

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

After the phase separation cycle of the initial suspension, the clamping mechanism 9 pushes the pressure plate 8 to the side of the rear riser 2 of the filter press. Then the sediment unloading operation begins, during which the filter plates 6 are pushed apart by a special mechanism or manually. At the same time, the plates 13, rigidly attached to the plates 6, are moved together with these plates, as shown in Fig. 3, and do not interfere with the removal of sediment, as well as inspection and 65 Cleaning of filter partitions.

The process of moving the protective screen for cases of using plates 14 (Fig. 5), 15 (Fig. 7) and 16 (Fig. 9)

similar to that described above for flat plate 13.

The construction of the claimed filter press, in which the filter plates are suspended on a bridge, is given as an example, and is only one of the possible options for implementing a useful model. In practice, a useful model can be

It is also used in filter presses with lateral plate suspension.

The essence of the useful model is that when compressed into a package of filter plates, the plates always form a protective screen, and when the filter press is opened, they open access to the filter plates.

A useful model can be used in the above-mentioned and similar designs of filter presses also in those cases where forced unloading of sediment is provided for in the latter with the help of various 70 unloading devices | see for example, patent of Ukraine Mo 14504, MKVU vo1025/12, publ. 09.01.97 r.1.

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

The proposed design provides reliable protection of service personnel, equipment and production premises from suspension emissions during emergency depressurization of the filter press and will find wide 7/5 application in all kinds of chemical and related industries.

Claims (4)

The formula of the invention 1. A filter press for filtering suspensions, containing a frame with front and rear risers, a pressure plate installed on the frame from the rear riser side, a set of filter plates located vertically between the pressure plate and the front riser and equipped with a filter cloth on the drainage surfaces, while the filter plates are equipped with vertically installed plates that form a protective screen along at least one side of the filter press when it is closed, a mechanism for moving the filter plates, which is characterized by the fact that said plates are fixed on the filter plates rigidly and in a position in which their planes are aligned with the side surface filter press corner 0-309, Z 2. The filter press according to claim 1, which is characterized by the fact that the adjacent plates are located in parallel planes at different distances from the side surface of the filter press. C. A filter press according to claim 1 or 2, which differs in that the edges of the plates are bent towards the side surface "From the filter press. 4. Filter press according to claim 1 or 2, which differs in that the edges of the plates are bent in opposite directions. o (Se) (ze) s - - y? ime) (95) (o) ("in) syu" 60 b5