JPS5852682B2 - filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filtration device that can maintain good filtration conditions at all times and can rapidly process stock solutions.

The same drawback of conventional filter presses using filter cloth is that the filtration ability decreases as the thickness of the filter slag layer adhering to the filter cloth increases.

To solve this problem, it is known that during filtration, for example, water is sometimes blown into the back side of the filter cloth to remove the slag layer from the filter cloth, but this method improves the filtration ability. ''- could be achieved to some extent, but there were problems such as poor dehydration effect and difficulty in automatically removing the filter dregs, and in the end, smooth filtration work could not be expected.

It is also well known to simply press the filtration chamber with fluid;
There was a problem that clogging of the filter cloth could not be resolved.

Therefore, the inventor of the present application provided a fluid chamber around the outer periphery of the filtration chamber, and by supplying fluid to the fluid chamber, the filter slag formed in the filtration chamber was compressed into a lump, and then the stock solution was mixed into the filter slag and the filter cloth. The above-mentioned drawbacks were eliminated by the revolutionary invention of separating the filter cloth from the filter cloth by press-fitting it between the filter cloth and filtering the stock solution on the surface of the filter cloth to which no filter cloth was attached.

The present invention further improves the above-mentioned invention and makes it possible to quickly and orderly suppress the filtration chamber, and details thereof will be explained with reference to the illustrated embodiments.

In the filtration apparatus shown in FIGS. 1 to 9, a cylindrical filter body 1
Multiple rubber bags are placed on the entire inner circumferential surface of 2. ... and the rubber bag 2. A stretchable water passage network 3 is provided around the circumferential surface of the water passage network 3, and the inner periphery of the water passage network 3 is covered with a filter cloth 4 to form a cylindrical stock solution filtration chamber in the center of the filter body. Form A.

An upper lid 5 is attached to the upper end of the filter body 1 by tightening bolts 6, and the upper lid 5 has a conical cylindrical guide portion 5 provided with a through hole 5a.
b are consecutively provided.

Then, connect the stock solution conduit pipe r and the air supply pipe 8 with a check valve to the upper lid 5.
It leads to the cavity 5c.

Further, at the bottom of the filter body 1, there is a bottom cover 9 having the same structure as the upper cover 5.
is rotatably mounted on a hinge 10 or the like, and a stock solution conduit 11 is opened in the bottom cover 9.

The button 12 is a fluid supply pipe such as water provided around the outer periphery of the filter body 1, and is connected to each rubber bag 2. ...Fluid chamber B formed inside
,... so that fluid can be pressurized into each rubber bag 2.・・・
・Inwardly opened pipe 13. ...is being piped.

For use in the filtration device of this example, first, the stock solution is pumped (not shown) through the conduit pipes 7 and 11 to the through hole 5 a r
If it is press-fitted into the filtration chamber A through 9a, the rubber bag 2 and water passage net 3 will be removed.
The filter cloth 4 is pressed against the inner circumferential surface of the filter body 1 to perform filtration, and the filtered water that has passed through the net 3 is guided to the collection pipe 14.

A filter sludge layer S is formed on the surface of the filter cloth 4 by filtration, and when the filtration sludge layer S reaches a predetermined thickness (see Figure 3), a fluid, water in this example, is pumped (not shown). ) to supply pipe 1
2. Each rubber bag 2. ... to the fluid chambers B, ... inside.

The pressure at this time needs to be higher than the pressure for injection of the stock solution.

As a result, the filtration chamber A is pressed, and the unfiltered stock solution in the filtration chamber A flows backward through the conduit pipes 7 and 11 and is discharged, and the filter slag adhering to the filter cloth 4 is pressed together, as shown in FIG. The situation will be as shown in .

That is, each fluid chamber B. ... expands and presses against the filtration chamber A, so that the filter dregs is pressed into a predetermined shape.

Next, when the pressure feeding of the water is stopped and the water is discharged from the fluid chamber B by flowing backward into the supply pipe 12, the pressure for injecting the stock solution overcomes and the filtration chamber A is filled with the stock solution, and the rubber bag 2, the water passage network 3, and the filter cloth 4 are filled with the stock solution. is pressed against the inner circumferential surface of the filter body 1 (see FIG. 5).

At this time, the undiluted solution is supplied at the same time that the filter cloths 4 pressed by removing the water are about to separate from each other, so the undiluted solution is press-fitted between the filter slag Sa and the filter cloth 4, which have become a lump, and is filtered. cloth 4
The filter cake Sa will be separated from the filter.

Therefore, a new stock solution is filtered on the filter cloth surface to which the filter slag Sa is not attached, and a new filter slag layer S is formed on the filter cloth surface again (see FIG. 5).

After a new filter layer S is formed, water is poured into each fluid chamber B again.
, .
The new filter dregs layer S and the old filter dregs Sa adhering to each other are pressed together (see FIG. 6).

Next, as described above, water is discharged from the fluid chamber B, the stock solution is press-fitted between the lump of filter slag sb and another filter cloth surface to which it is not attached, and a new filter slag S is added to the filter cloth. (See Figure 7).

This operation is repeated, i.e., the water is pumped into each fluid chamber B, etc., the old filter slag and the new filter slag are pressed together, and then the pressure in fluid chamber B is lowered, and the filter slag becomes a lump. The operation of pressurizing the stock solution between the unadhered filter cloth surface and forming new filter slag on the filter cloth surface is repeated an appropriate number of times.

As shown in FIG. 8, when the amount of filter scum Sc increases and it is desired to remove it, compressed air is suddenly supplied from the supply pipe 8 to the filtration chamber A at the same time as water is removed from the fluid chambers B, .

This compressed air presses the rubber bag 2, water passage net 3, and filter cloth 4 against the inner peripheral surface of the filter body 1, and a lump of filter slag is removed from the filter cloth 4 at once, so the bottom cover 9 is opened and the filter slag is removed. All you have to do is let it fall naturally (see Figure 9).

In this way, after the filter dregs adhering to the entire surface of the filter cloth are pressed together, the stock solution that is press-injected is filtered through the filter cloth from which the filtration dregs are separated, so that smooth and rapid filtration can be achieved.

The characteristic feature of this example is that there are a plurality of fluid chambers B, and each fluid chamber B is equipped with a passage pipe 13 that can supply and discharge fluid, and a supply pipe 12 that can reverse flow. This means that the filtration chamber A can be pressed extremely quickly, and the filtration dregs can be compressed and the filtration action can be performed more quickly than when there is only one fluid chamber.

Each broken fluid chamber B. ... can expand, so the filtration chamber A
This has the advantage that the filter dregs can be pressed strongly and the filter dregs can be crimped in a regular and orderly manner so that the filter dregs have a predetermined shape, and the discharge and disposal of the filter dregs is also facilitated.

Although this example is configured as described above, the present invention is not limited thereto.

For example, any material constituting the fluid chamber may be used as long as it is an impermeable stretchable bag.

Further, the number of fluid chambers formed therein is also arbitrary.

Further, the configuration of the fluid supply/discharge device for supplying fluid to each fluid chamber or discharging fluid from the fluid chamber is not limited, and the fluid supply device and the discharge device may be separate devices.

Note that the configuration of the filtration chamber or the configuration of the stock solution press-in device is also suitable.

In short, the present invention provides a fluid chamber formed by an impermeable material around the outer periphery of a stock solution filtration chamber consisting of a filter wall, a filter cloth, etc., supplies fluid to the fluid chamber, and filters unfiltered stock solution while discharging it. a device that presses and crimps the filter dregs formed in the chamber into a lump;
- In the device which always filters the stock solution through a filtration section to which no filter cake is attached by providing a device that presses the stock solution into the space between the lump filter cake and the filter cloth to which it is attached while separating them, A fluid supply/discharge device that forms a plurality of independent fluid chambers by arranging a plurality of impermeable elastic bags around the outer periphery of a filtration chamber, and can supply fluid to each fluid chamber or discharge the supplied fluid. This is a filtration device characterized by comprising:

Therefore, according to the present invention, a plurality of independent fluid chambers are formed by the compressible bag body, and each fluid chamber is equipped with a fluid supply/discharge device, so that the filter dregs can be compressed quickly and at a high pressure, and the filtration can be carried out. It has a great effect of smoothing the action, and since the pressure in some fluid chambers can be adjusted, the pressure of the filter slag can be adjusted, and the pressure of the filter slag can be neatly crimped into a predetermined shape, making it easier to discharge and handle the filter slag. There are also advantages.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, and FIG. 1 is a front view thereof;
Figure 2 is a longitudinal sectional front view of the stock solution injected, Figure 3 is an enlarged NN cross-sectional view of Figure 2, and Figure 4 is the fluid chamber B.
5 is a sectional view corresponding to FIG. 3 when fluid is pressurized into the
The figure is a cross-sectional view corresponding to Fig. 3 in the state shown in Fig. 4 with the stock solution injected under pressure, and Fig. 6 is a sectional view corresponding to Fig. 3 in the state shown in Fig.
7 is a sectional view corresponding to FIG. 3 in which the stock solution is again pressurized in the state shown in FIG. 6, and FIG. 8 is a sectional view corresponding to FIG. 3 showing the laminated filter dregs. , FIG. 9 is a partially cutaway front view showing a state in which filter dregs are discharged. 4: Filter cloth, 2: Impermeable elastic bag, 7, 11: Stock solution conduit, 8: Compressed gas supply tube, 12: Fluid supply tube, 13: Conduit, A: Filtration chamber, B: Fluid chamber.

Claims (1)

[Claims] 1 In a device equipped with a stock solution supply/discharge device for pressurizing stock solution into a stock solution filtration chamber A consisting of a filter wall, a filter cloth, etc. or for discharging the stock solution inside the filtration chamber A, a plurality of impermeable holes are installed around the outer periphery of the filter chamber A. A plurality of fluid chambers B are formed independently by arranging the flexible elastic bag, and a fluid supply/discharge device is provided that can supply fluid to each fluid chamber B or discharge the supplied fluid. A filtration device.