JPH0515481B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a clarification filtration method for separating and removing turbidity contained in water, sewage, industrial water, industrial wastewater, water from aquariums, etc. and its apparatus.

[Problems to be solved by conventional technology and invention]

As a clarifier that can handle highly turbid raw water, filtration devices with a sponge material layer have come to be used.

Conventionally, in cleaning the sponge material layer in this type of filtration device, cleaning water and air are flowed either singly or simultaneously to wash away the suspended matter trapped in the sponge material and discharged to the outside of the system. however,
In a soft elastic body with a mesh structure like a sponge, suspended matter is trapped inside, and it is difficult to completely wash out the inside by such a cleaning operation.

Furthermore, attempts have been made to utilize the elasticity of the sponge to compress the sponge from the outside with a mechanical means such as a cylinder to squeeze out the turbid content inside the sponge. The advantage of this method is that the liquid can be removed in a short time, but the means for compressing the sponge is structurally complex, and there are also problems in discharging the squeezed turbidity out of the system.

The present invention makes it easy and effective to compress the sponge material and discharge the squeezed suspended matter out of the system.
This is an attempt to solve problems in compression cleaning of sponge materials.

[Means for solving problems]

The present invention is a clarification method in which a sponge material layer is used to capture suspended matter in water, in which an expanding body is disposed within the sponge material layer, and a fluid is pressurized into the expanding body during cleaning of the material to remove the expanding body. A clarification filter characterized by compressing the sponge material layer by expanding it, squeezing out the suspended matter trapped within the material, and discharging the squeezed out suspended matter out of the system using washing water. A method and apparatus thereof.

[Effect]

In the present invention, filtration is performed using a sponge material layer in the tank to remove suspended matter in the water,
If such filtration is continued for a long period of time, the resistance increases as in conventional filtration, and in some cases, suspended matter begins to leak into the filtrate, so the sponge material layer must be cleaned.

When cleaning, a fluid such as water or air is pressurized into an inflatable body placed inside the sponge material layer, and the inflatable body is expanded to compress the sponge material and remove the suspended matter trapped within the sponge material. This method squeezes out the suspended matter and introduces washing water into the tank to accurately wash out the squeezed suspended matter out of the system.

In addition, if a spout is provided in the expandable body and the injected fluid is jetted out at the same time as the expandable body expands, in addition to the squeezing effect of the sponge material, the flushing effect of the suspended matter will be promoted by the jetted fluid. Ru.

The deflation of the inflatable body after cleaning is carried out by the restoring force of the sponge material by expelling the fluid that was forced into the inflatable body, but the expansion and contraction of the inflatable body is repeated to achieve the effect of removing suspended matter. It can also be increased.

〔Example〕

Further, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, 1 indicates a tank, in which a removable upper porous support 2 and a lower porous support 3 are disposed, and these upper and lower porous supports 2,
A sponge material 4 is filled between the spaces 3 to form a sponge material layer.

An expandable body 5 that expands and contracts by pressurizing and expelling fluids such as water and air is provided in the sponge material 4, and is fixed to the upper and lower porous supports 2 and 3 by support members 6 and 7. has been done. At the top of the tank,
Expansion fluid introduction pipe 8 for expanding the expansion body 5
is connected via a three-way valve V1, one of which is connected to the atmosphere, and a flexible tube 9 is connected from this connection.
It is communicated with the inside of the expansion body 5 by.

Further, above the upper porous support 2 in the tank, a raw water inlet pipe 10 is opened via a raw water valve V2, and a washing drain pipe 11 is connected in the middle, and the washing drain pipe 11 is connected via a drain valve V3. The drain part 12 is reached. Further, the lower part of the lower porous support 3 in the tank serves as a water collection part 13, and a superfluous outflow pipe 14 having an overwater valve V4 is connected to this water collecting part 13. 14 has a cleaning water introduction pipe 15
are connected to each other via a wash water valve V5, so that wash water can be guided into the water collection section 13.

Note that the water collection section 13 includes a cleaning air introduction pipe 16.
It is preferable to open the air valve V6 through the air valve V6, and introduce air into the water collection part 13 when cleaning the sponge material 4 as necessary.

Further, in a preferred embodiment, the expansion body 5 is provided with a jet port for the inflation fluid press-fitted, so that the pressure fluid is jetted out while expanding the expansion body 5, thereby promoting the cleaning effect of the sponge material 4. be.

Therefore, during the period of time, the raw water introduced from the raw water introduction pipe 10 is guided into the overtank 1 through the raw water valve V2. Next, the raw water flows into the sponge material 4 from the upper porous support 2, the suspended matter in the raw water is captured by the sponge material 4, and the clarified superwater passes through the lower porous support 3 and flows into the water collection section 13. The water is collected in
The excess water flows from the excess water outflow pipe 14 through the excess water valve V4 and is sent to a necessary location outside.

If this type of filtration is continued for a long time, as with conventional filtration equipment, the resistance will increase, and in some cases, suspended matter will begin to leak into the filtration water.
The sponge material 4 is cleaned.

When cleaning the sponge material 4, use the raw water valve V2.
close to stop the flow of raw water into the overtank 1,
Close the overwater valve V4 and close the drain valve V in the cleaning drain pipe 11.
Open 3. Next, when the wash water valve V5 is opened and the wash water is introduced into the water collection part 13 through the overwater outflow pipe 14, the wash water is dispersed in the lower porous support 3 and washes the sponge material 4 in an upward flow. Become,
The cleaning drainage water is discharged from the cleaning drainage pipe 11 to the drainage section 12 via the drainage valve V3. At the same time, compressed air as an inflation fluid, for example, is forced into the inflation body 5 from the inflation fluid introduction pipe 8 through the three-way valve V1 and further through the flexible tube 9. By press-fitting the compressed air, the expandable body 5 expands and the sponge material 4 is compressed outward, as shown by the two-dot chain line. As a result, the suspended solids trapped in the sponge material 4 are squeezed out, and are discharged to the drainage section 12 as cleaning wastewater along with the upwardly flowing cleaning water.

In addition, a compressed air outlet is provided in the expansion body 5,
When compressed air is ejected while expanding the expandable body 5, in addition to the effect of squeezing out the turbidity from the sponge material due to the expansion, the compressed air also has the effect of washing away the turbidity, thereby promoting the cleaning effect of the sponge material 4. Ru.

Furthermore, in the above-mentioned cleaning operation, the expansion body 5
It is also a preferable embodiment to repeat the expansion and contraction of the sponge material 4 to enhance the effect of squeezing out the suspended matter in the sponge material 4. That is, when the expansion body 5 is expanded, compressed air is forced into the expansion body 5 as described above, and when the expansion body 5 is deflated, the three-way valve V1 is pressed.
The expansion body 5 is repeatedly opened to the atmosphere and contracted as shown by the broken line.

In addition, when discharging suspended matter with the washing water,
If cleaning air is introduced into the water collecting section 13 from the cleaning air introduction pipe 16, the effect of removing suspended matter will be promoted.

Further, as the inflation fluid, pressurized water or a gas-liquid mixture thereof may be used instead of the compressed air.

Further, FIGS. 2 and 3 show other embodiments of the device of the present invention, and in the first illustrated example, the expansion body 5
is placed in the center of the overtank 1, and its expansion causes the sponge material 4 to be compressed in the outer circumferential direction, whereas in the examples shown in FIGS. 5 is divided into one or more parts and attached to the side wall of the tank 1, and each expander 5 is connected to a flexible tube 9. Therefore,
The sponge material 4 is compressed toward the center of the overtub 1 by the expansion of the expansion body 5 (indicated by the two-dot chain line).

〔Effect of the invention〕

As described above, according to the present invention, it is possible to easily and effectively squeeze out the suspended matter by compressing the sponge material during cleaning and to discharge the squeezed suspended matter out of the system. This has the extremely beneficial effect of quickly and reliably recovering function.

[Brief explanation of drawings]

FIG. 1 is a structural explanatory diagram showing one embodiment of the present invention;
FIG. 2 is a structural explanatory diagram showing another embodiment of the present invention;
FIG. 3 is a sectional view taken along the line -- in FIG. 2. 1... Pass tank, 2... Upper porous support, 3...
Lower porous support body, 4... Sponge material, 5... Expandable body, 6, 7... Support member, 8... Inflation fluid introduction pipe, 9... Flexible tube, 10... Raw water introduction pipe, 11... Washing drain pipe, 12... Drain section, 13... Water collection section, 14... Overwater outflow pipe, 1
5...Washing water introduction pipe, 16...Cleaning air introduction pipe, V1...3-way valve, V2...Raw water valve, V3...
...Drain valve, V4...Overwater valve, V5...Washing water valve, V6...Air valve.

Claims (1)

[Claims] 1. A clarification method in which a sponge material layer is used to capture suspended matter in water, in which an expanding body is provided within the sponge material layer, and a fluid is pressurized into the expanding body during cleaning of the material. It is characterized by compressing the sponge material layer by expanding the expansion body, squeezing out the suspended matter trapped within the material, and discharging the squeezed out suspended matter out of the system using washing water. A clarification method. 2. The clarification method according to claim 1, wherein the expanding body is expanded while jetting out the pressurized fluid from inside the expanding body. 3. The clarification method according to claim 1 or 2, wherein the expansion of the expansion body is repeated intermittently. 4 In a clarification device in which a sponge material layer is formed in the tank, an expansion body is provided in the sponge material layer, a pressure fluid introduction pipe for expanding the expansion body is connected to the expansion body, and a cleaning water flow is further introduced into the tank. A clarification filtration device characterized by opening an inlet pipe and a cleaning drainage pipe. 5. The clarification device according to claim 4, wherein the expansion body is provided with a spout for the introduced pressure fluid.