JPS582409Y2 - filter press - Google Patents

Description

[Detailed description of the invention] This invention relates to a filter press with improved dewatering efficiency.

Generally, in a filter press, the opening of the filter frame is closed with a filter cloth to form a filtration chamber, and the sludge is put into the filter chamber, and a filter made of elastic material such as rubber installed opposite the filter cloth is used. The pressure plate is pressurized by means such as air pressure or water pressure to squeeze out the sludge, and the water filtered outside the filter cloth is discharged to the outside through a drainage groove formed in the pressure plate.

However, conventional filter presses have a problem in that the efficiency of discharging filtered water is poor, and after a dewatering operation, a portion of the filtered water remains in the drain groove of the pressure plate without being discharged.

For this reason, the water remaining in the drain groove of the pressure plate passes through the filter cloth and is absorbed into the sludge again, making it difficult to improve the dewatering efficiency.

This idea was made in view of the above circumstances, and its purpose is to provide a filter press with high dewatering efficiency by allowing all of the filtered water to be discharged without remaining in the drainage groove of the pressure plate. It's about doing.

An embodiment of this invention will be described below with reference to the drawings.

Fig. 1 shows a side view of the filter press of this invention. In the figure, 1 and 2 are left and right frames, and a pair of guide rails 3 is horizontally suspended between these left and right frames 1 and 2. A plurality of filter frames 4 and pressure frames 5 are mounted on the rail 3, with the pressure frames 5 sandwiching both sides of the filter frame 4 (in the drawing, six filter frames 4 and seven pressure frames 5 are shown).

) is equipped to be movable. Here, the filter frame 4 is constructed as shown in FIGS. 2 and 3.

That is, rollers 6 are provided above both sides of the filter frame 4, and the rollers 6 roll on the guide rails 3.

Further, a support rod 8 is provided on the upper surface of the filter frame 4 via a support 7, and a filter cloth 9 is hung on the support rod 8 by folding it in half. A filter chamber 10 is formed inside the filter frame 4 by closing the portion 4a.

Furthermore, a sludge inlet 11 is provided at a lower position on one side of the filter frame 4 to penetrate into the filter frame 4, and a check valve 12 driven by hydraulic pressure and a flexible pipe 13a are connected to the sludge inlet 11.
A sludge supply pipe 13 is connected via the sludge supply pipe 13.

This sludge supply pipe 13 is installed substantially parallel to the guide rail 3, and is adapted to supply sludge into the reducing wheel 10 of each filter frame 4 during dewatering operation.

The filter frame 4 further includes an air vent valve 11a at the top of the filter frame 4 so that when sludge flows in, the air in the reduced vehicle 10 is pushed out. When a closes, limit switch 11b is turned on, and limit switch 11 is turned on.
When b is turned on, hydraulic pressure is supplied to the check valve 12 and it is closed.
The sludge supply is now stopped.

The exhaust pipe 12b collects the pipes coming from the base frame and returns them to the sludge tank.

This air vent valve 12H has a structure that allows rapid supply of sludge.

Furthermore, a backing material 1 is placed around both openings 4a of the filter frame 4.
4 are provided.

Note that the check valve 12 prevents the sludge put into the reducing vehicle 10 from flowing back into the sludge supply pipe 13 during the dewatering operation.

Further, the pressure frame 5 is constructed as shown in FIGS. 2, 4, and 5.

That is, rollers 15 are provided at positions above both sides of the pressure frame 5, and the rollers 15 roll on the guide rails 3.

Further, a hole 16 is provided at approximately the center of the upper surface of the pressurizing frame 5, and a hydraulic bag body 1 made of rubber or the like is attached inside the pressurizing frame 5.
An oil inlet 17a of No. 7 protrudes from the hole 16, and this oil inlet 17a is connected to a hydraulic oil supply pipe 18 via a valve 18a and a flexible pipe 18b.

The hydraulic oil supply pipe 18 is installed substantially parallel to the guide rail 3, and is configured to supply hydraulic oil to each hydraulic bag body 17 during a dewatering operation.

Furthermore, rectangular pressure plates 19 made of rubber or the like are provided in both openings 5a of the pressure frame 5 so as to cover them.

When hydraulic oil is supplied to the hydraulic bag 17, the pressure plate 19 is pressed by the hydraulic bag 17 and bulges toward the filter cloth 9, and faces the filter cloth 9. A plurality of exhaust/drainage grooves 20 and intake grooves 21 extending in the vertical direction are alternately provided on the surface side (four exhaust/drainage grooves 20 and four intake grooves 21 in the drawing).

The lower end of each exhaust/drain groove 20 is connected to a common exhaust/drain groove 20 provided below the pressure plate 19 and extending laterally.
a, and this common exhaust/drainage groove 20
a is the hole 22 of the pressurizing frame 5 from the hole 22 provided at one end thereof.
It communicates with an exhaust/drainage hole 23 provided at a position opposite to , and further, this exhaust/drainage hole 23 communicates with a liquid collection pipe 24 via a flexible tube 24a.

An exhaust/drainage pump (not shown) is connected to one end of the liquid collecting pipe 24.

As described above, water is discharged from each exhaust/drainage groove 20 to the liquid collecting pipe 24.

On the other hand, the upper end of each intake groove 21 communicates with a common intake groove 21a provided above the pressure plate 19 so as to extend in the horizontal direction, and this common intake groove 21a is connected to a hole 25 provided at one end of the common intake groove 21a. It communicates with an intake hole 26 provided in the pressurizing frame 5 at a position opposite to the hole 25, and further, this intake hole 26 communicates with an intake pipe 27 via a flexible tube 27a.

One end of this intake pipe 27 communicates with the outside air, and air flows into each intake groove 21 from the intake pipe 27.

Furthermore, a rectangular perforated plate 28 made of rubber or the like is superimposed on the side of the pressure plate 19 on which exhaust/drainage grooves 20, etc. are provided, and these pressure plate 19 and perforated plate 28 are not shown. It is fixed to the peripheral edges of both openings 5a of the pressurizing frame 5 by fixing means such as bolts.

This perforated plate 28 serves as the pressure plate 1 when the pressure plate 19 expands.
9 and bulges toward the filter cloth 9 side, and a large number of small holes 29 are provided at positions facing the exhaust/drainage grooves 20 and the intake grooves 21.

Furthermore, grooves 30 are provided on the side of the perforated plate 28 facing the filter cloth 9 to allow the small holes 29 to communicate with each other.

The filter frame 4 and the pressure frame 5 configured as described above are connected to each other by a connecting fitting 31 so as to be separated from each other by a predetermined distance, and are located on the rightmost side as shown in FIG. The pressurizing frame 5 is connected to a movable head 32 movably mounted on the right side of the guide rail 3.

This moving head 32 is connected to a ram (not shown) of a hydraulic cylinder 33 provided on the right pedestal 2.

In the figure, 34 is a fixed head provided at the left end of the guide rail 3, 35 is a weight bar provided at the lower end of the filter cloth 9, and 36 is a fixed head provided at the left end of the guide rail 3.
Reference numeral 37 indicates an opening tool provided on the upper surface of the pressurizing frame 5, and 37 indicates a hammer bar provided at a lower position of the left and right frames 1 and 2.

Next, the operation of the above device will be explained.

First, the hydraulic cylinder 33 is operated to move the moving head 32 to the left in FIG.

As a result, the filter frame 4 and the pressure frame 5 are pressed toward the fixed head 34, and the filter frame 4 and the pressure frame 5 are brought into close contact with each other.

At this time, the backing material 14 provided around the periphery of the opening 4a of the filter frame 4 maintains airtightness and water tightness between the filter frame 4 and the pressurizing frame 5.

After doing the above, the sludge 40 is introduced into the filter chamber 10 from the sludge supply pipe 13 through the sludge inflow hole 11.

(See FIG. 7) From the hydraulic oil supply pipe 18 to the valve 18a,
Hydraulic oil is supplied to the hydraulic bag 17 through the oil inlet 17a to inflate the hydraulic bag 17 as shown in FIG.

As a result, the pressure plate 19 and the perforated plate 28 are pressed against the filter cloth 9 side to squeeze out the sludge 40 in the reducing vehicle 10, and the water filtered by the filter cloth 9 is sucked into the perforated plate by an exhaust/drainage pump (not shown). It flows into the exhaust/drainage groove 20 of the pressure plate 19 from the small hole 29 of No.
2. It passes through the exhaust/drainage hole 23 and is discharged to the liquid collecting pipe 24.

At this time, outside air is sucked in from the intake hole 26, and the air passes through the hole 25, the common intake groove 21a, and the intake groove 21, and then enters the small hole 29 facing the intake groove 21 of the perforated plate 28, and then passes through the hole 25, the common intake groove 21a, and the intake groove 21. The exhaust/drainage groove 20 passes through the groove 30 on the side of the plate 28 facing the filter cloth 9 and returns from another small hole 29 of the perforated plate 28.
The liquid flows through the liquid collection pipe 24 .

Therefore, the filtered water is efficiently discharged by the air sucked through the intake hole 26, and there is no risk of it remaining in the exhaust/drainage groove 20.

Even after the filtered water has been discharged, the exhaust/drainage pump is operated for a while to allow air to flow.

As a result, the filter cloth 9 is dried and further absorbs moisture from the cake attached to the filter cloth 9.

At this time, if dry air or warmed air is flown, the filter cloth 9
The drying process is accelerated, the dewatering efficiency is further improved, and the cake adhering to the filter cloth 9 also becomes easier to separate from the filter cloth 9.

When the dewatering operation is completed as described above, the moving head 3
2 to the right pedestal 2 side in the opposite direction to the previous time.

As a result, the filter frame 4 and the pressure frame 5 are separated by a predetermined distance, and the filter cloth 9 is separated from the opening 4a of the filter frame 4 by the opening fitting 36 on the upper surface of the pressure frame 5.

After doing this, a weight bar 35 provided at the lower end of the filter cloth 9 is struck by a hammer bar 37 to cause the cake attached to the filter cloth 9 to fall.

In addition, according to the above embodiment, the perforated plate 28 is used to allow the air introduced from the intake groove 21 to pass through the surface of the filter cloth 9 and be exhausted.
Although a case is shown in which the water is sucked into the drain groove 20, the structure is not limited to the above-mentioned perforated plate 28, and for example,
In place of the perforated plate 28, an intake groove 21 and an exhaust/drainage groove 2
Of course, it is also possible to prepare a plate piece with a small hole formed in each position facing 0 and a wire mesh, and to interpose the wire mesh between the plate piece and the filter cloth 9.

As explained above, according to the filter press of this invention, an exhaust/drain groove connected to the exhaust/drain pump and an intake groove communicating with the outside air are formed on the surface of the pressure plate facing the filter cloth. In addition, a member (perforated plate) is interposed between the pressure plate and the filter cloth to form a gap so that air introduced from the intake groove passes through the surface of the filter cloth and flows into the exhaust/drainage groove. Because of this, the drainage efficiency of water filtered by the filter cloth during dewatering operations is improved, and the water does not remain in the exhaust/drainage groove of the pressurizing plate, and as a result, once filtered water is absorbed into the material to be dehydrated again. The dehydration efficiency is improved.

In addition, even after the dewatering operation is completed, air can be introduced from the intake groove and passed through the surface of the filter cloth, so that the drying of the filter cloth is promoted and the filter cloth is free from the dehydrated material even after the squeezing is completed. By suctioning the water, the dewatering efficiency is further improved, and the cake adhering to the filter cloth can be easily removed.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; Fig. 1 is a side view of the entire device, Fig. 2 is a perspective view of the main parts of this invention, and Fig. 3 is a side view of the entire device.
The figure is a front view of the filter frame, Figure 4 is a front view of the pressure frame with the pressure plate and perforated plate omitted, Figure 5 is an exploded perspective view of the pressure frame, and Figure 6
The figure is a partial perspective view showing the connection relationship between the filter frame and the pressurizing frame.
9 to 9 are explanatory diagrams for explaining the dehydration operation. 4...Filter frame, 9...Filter cloth, 10...
... Filter chamber, 19 ... Pressure plate, 20 ...
・Exhaust/drain groove, 21...Intake groove, 28...
...Perforated plate, 29...Small hole, 30...
·groove.

Claims (1)

[Scope of utility model registration request] In an apparatus for dewatering by closing an opening of a filter frame with a filter cloth to form a filter chamber, putting a material to be dehydrated into the reduction chamber, and compressing the material to be dehydrated by a pressure plate installed opposite to the filter cloth. , an exhaust/drainage groove connected to an exhaust/drainage pump and an intake groove communicating with outside air are formed on the surface of the pressure plate facing the filter cloth, and between the pressure plate and the filter cloth, A filter press characterized in that a member is interposed to form a gap such that air sucked from the intake groove passes through the surface of the filter cloth and flows into the exhaust/drainage groove.