SU967514A1 - Press=filter for cleaning suspensions - Google Patents

Description

The invention relates to filter technology, in particular to filter presses used for filtering liquid suspensions in the chemical, mining, metallurgical, coal, food and other industries of the industry ..

A filter press is known, which has an ox on each plate its endless filter fabric flj.

The disadvantage of this design is that the plates are moved apart by an accordion, forming gaps between the plates to remove sludge, which leads to an increase in the dimensions of the filter press. In addition, special drives j are used to unload sediment, for which a lot of energy is expended, as well. The stretching of the fabric is also inevitable.

Closest to the invention is a horizontal filter press for filtering slurries containing thrust and pressure plates with interposed filter plates, the drainage devices of which are covered by two branches of an endless belt of filter cloth worn on the upper and lower rollers C 2.

A disadvantage of the known filter press is the need to force the rollers to rotate in order to move the endless filter sheet and to unload, thus, sediment when the filter press is opened.

The purpose of the invention is to increase the efficiency of discharge of sediment under the action of its own weight.

This goal is achieved by the fact that the upper and lower rollers are set offset from the drainage; device, allowing the endless filter carton to move freely around the rollers when the filter press is open.

In this case, the filter press is equipped with an asterisk mounted along the axis

20 of the upper roller, with a chain tensioned along the axis of the filter press, and a spring-loaded toothed coupling through which the sprocket is connected to the roller.

The proposed design of the filter 25 of the press provides unloading of osgshchka without any part of the motor mechanism, the sediment is removed by scrolling the endless belt of filter cloth due to 30 imbalance of its two branches, with only one of them mashl sediment. If there is a significant amount of adhesion between the branches of the endless belt of the filter sheet, so that the mass of the lower moving roller is not enough to separate the branches of the sheet that are stuck in the filtering process, or the sludge mass is not sufficient to overcome the frictional forces in the nodes of the rollers, to communicate the initial velocity on the axis of the upper roller, the sprocket or unloading is loosely mounted an asterisk, which, being in constant engagement with the chain tensioned along the filter press, is connected to the roller by means of chatoy clutch plate which is to shorten the stroke length and avoid inhibiting the movement of an endless belt of filter cloth with the precipitate at a stop plate connected to the roller axis by means of sliding dowels, and is urged by a spring to the sprocket.

Figure 1 shows the proposed filter press, a General view; Fig. 2 is a section A-A in Fig. 1 (filter plate); nafig.3 - section BB in figure 1 (the asterisk of the upper roller); figure 4 - section bb In figure 2; Fig. 5 shows the assembly I in Fig. 1 (the lower movable roller and the swinging arm with a groove); on figb - node II in FIG. 2 (gearing of a gear coupling with an asterisk).

The filter press consists of a support plate 1 and a clamping device 2 interconnected by support beams 3, filter plates 4 and pressure 5 are mounted on the beams. On the filter plate at the top of the two brackets b there is a roller 7 which is attached with a gear coupling 8 and a spring 9 connected to the sprocket 10. The sprocket is in constant engagement with the chain 11 tensioned along the filter press. At the bottom of the plate on the two swinging arms 12 is mounted the roller 13.

An endless filter fabric 14 is installed on the rollers so that both branches are located on one side of the drainage device 15 located on one side of the filter plate, and on the other hand on the crepis plate elastic diaphragm 16, designed for mechanical pressing and compaction of sediment 17.

Through the channel 18, the suspension is fed into the chamber space formed between the filter plates, compressed by the clamping device, the filtrate passes through both branches of the endless belt of the filter cloth 14, through the drainage device flows through the channel 19.

is collected in the chamber space 20. After the filtering is completed, through the channel 21, under the diaphragm, water or air is supplied under pressure, due to which mechanical

squeezing and compaction of sediment. If necessary, sludge spills wash out the liquid through the channel 22. At the end of all technological operations unloading is performed

0 draft.

With the help of a clamping device, the plate is retracted and, using the mechanism 23 for moving the plates, the carriage 24 moves the plates. With

When the plate is moved, the lower roller with its mass keeps the endless filter sheet in a tensioned condition. At the same time, an asterisk, on: 5 gears in engagement with the link, rotating 1

0 and rotates through the gear coupling

top roller. Movie reports the beginning. new movement of the infinite filter cloth ,, yo due to the fact that the branches of the filter cloth

5 are not balanced (the sediment has collected on only one branch), the movement under the action of the mass of the sediment continues even after stopping the movement of the plate until it is finally

n come down at the bottom roller whole. After the sludge has been discharged, the set 3: is pressed with a horizontal device and the process is repeated. .

Job description of the proposed

j. filter press is given for the case of working with a sediment of small mass and. great adhesion. In the case of filtering suspensions to form a sediment of considerable mass, the presence of an asterisk and a chain is not necessary, since the precipitate rotates an endless belt of filter cloth during the movement of the plate.

The advantage of the press filter offered by the filter in comparison with the existing ones is a reduction in the overall size of the filter press, which makes it possible to use production areas more economically. In addition, the use of sludge mass for its discharge provides savings in energy costs.

Claims (1)

1. A filter press for filtering suspensions containing stop and pressure plates with filter plates arranged between them, the drainage devices of which are covered by two branches of an endless belt of filter cloth worn on the upper and lower rollers, characterized in that increase the efficiency of unloading