JPS61141909A - Upward flow type filter apparatus with filter material washing apparatus - Google Patents

Abstract

PURPOSE:To prevent the generation of a malodor, by providing a water stream type ejector for sucking a filter material and sludge and a cyclone type sand separator for taking in sludge and the filter material from upper flow to the lower part of a filter apparatus. CONSTITUTION:A mixture of a filter material and sludge is sucked and drawn out from the bottom part of a filter material accumulation layer 3 by a water stream type ejector 5. As water for operating the ejector 5, filtered treated water is used and introduced into the ejector 5 under pressure by a washing pump 4. The filter material and sludge pass through a rising pipe to enter a cyclone type sand separator 6. Conc. waste water of sludge is discharged from the upper flow of the sand separator and the filter material from the under flow thereof to be equally accumulated on the upper part of the filter material accumulation layer 3 by the action of a filter material distribution cone 7. Raw water is introduced under pressure from the interior of the filter material accumulation layer 3 and rises through the accumulation layer to be filtered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a filtration device suitable for biologically treated sewage and wastewater, and relates to a system capable of completely continuous p-filtration operation.

Conventional technology In order to filter wastewater with a high concentration of suspension or wastewater containing pollutants that easily cause clogging, cleaning and reusing the filter media must be carried out continuously, simply, smoothly, and efficiently to maintain a high-efficiency filtration rate. things are required.

Upflow filtration devices that meet these demands include a method that uses an air lift to blow up the filter material that has captured the suspension into the atmosphere, cleans it, and allows the sludge to overflow and reuse the filter material that settles naturally. A method is used in which the captured filter media is taken out using a pump, etc., and placed in a screw conveyor washer, and while the screw is scraping up the filter media, the filter is stirred to remove the sludge that has adhered to the filter media.

Problems to be Solved by the Invention In such conventional methods, noise is generated due to the generation, injection, and discharge of sewage when it has an odor. There are dances such as the Kasase waste water. In addition, it tends to have a considerable negative impact on the living environment due to bad odors. Therefore, when the installation location is restricted to indoors or when installing outdoors in a crowded area, f
"i%" is likely to be inconvenient.Furthermore, the conventional cleaning/separation method for filter media as described above has problems such as the filter media being mixed into waste water and flowing out, and cannot be said to be efficient.

The present invention is an upflow filtration device with a p filter material cleaning device that eliminates the drawbacks of the conventional system as described above, is simple, does not break down, and provides low equipment and operating costs.

In configuring the entire system to solve the problem, ILK LOW 8 is equipped with a water flow ejector that sucks and discharges the mixture of filter media and sludge after the filtration operation. The sludge is washed from the filter media and guided to the inlet of the sand separator on one side of the filter. Thick sludge is taken out from the upper flow, and filter material is taken out from the underflowt,z By installing a cyclone type sand separator on one side of the device, the drainage of thick sludge from the upper flow is completely sealed. It can be carried out in the street and does not emit odor or generate noise. Furthermore, the cyclone type Punto separator has been widely used to remove sand from water, and its efficiency is well known. By using a sand separator, the filter material can be completely separated and will not flow out from the upper 70-.

The underflow from the buikron type sand separator falls into the water that has finished the upward flow filtration process, is distributed to the upper part of the sedimentary layer of the filter material, and flows downward.

The raw water is forced into the layer of filter material by a pump, becomes clear as it passes upward through the layer of filter material, leaves the layer of filter material, and is taken out from the top as treated water.

As described above, the filter material always moves from the top to the bottom, is continuously discharged, and is regenerated during the washing and separation process, so that the filtration function does not deteriorate due to blinding υ.

Example The present invention will be described in detail below with reference to embodiments shown in the drawings.

In the following description, an embodiment of the filtering device according to the present invention having the simplest configuration will be explained.

In FIG. 1, reference numeral 5 denotes a water jet ejector that sucks and extracts a mixture of filter material and sludge from the bottom of the filtered sediment layer 3. The water used to operate the ejector is filtered water, which is pressurized into the ejector using a cleaning pump (4).

The extracted filter material and sludge pass through the riser pipe and are injected into the cyclone type sand separator (6). Next, a thick suspension of sludge is discharged from the upper flow of the sand separator and becomes cleaning wastewater. The filter material is discharged from the underflow, settles and falls into the clear area above the filter material accumulation layer 3, and the filter material raw water installed above the layer 3 is injected under pressure.
It ascends the sedimentary layer of 3, leaves the unfiltered 3, and takes it out from the top as treated water.

The embodiment shown in Fig. 1 describes a case in which about 10% suspension may be allowed to be mixed in the filtered water, and the emphasis is on reducing facility costs, but the embodiment shown in Fig. 2 It is a figure which shows another Example for improving the clarity of filtered water.

In order to re-separate the sludge that is partially mixed in the filtration material discharged from the underflow of the sand separator 6, a re-separation tank 8 is installed within the clarification area without directly dumping the underflow into the water area of the p-filtering light r. and after re-separation in 8,
7 is deposited on the top of diameter 3. As the concentration in the tank 8 gradually increases as the operation progresses, it is drained periodically.

By using this method, the clarity of the filtered water can be extremely high.

By employing this cyclone type sand separator in the overall structure of the above-described filtering and filtration device, continuous filtration can be carried out economically and efficiently without disturbing the environment.

Effects of the Invention To show an example of operating this device, the device was installed indoors, the diameter of the filtration device body was 30 cm, and raw water was flowed at a speed of 167 cm.

The discharge amount of the cleaning pump 5 was set to the amount that would allow the Punto separator 7 to function at its highest efficiency.

The amount of upper flow was t6L/min, and the underflow was 0.4t1min.

Through the above operations, the recovery rate of Suspense/Con was maintained at 90 inches, and continuous passing continued smoothly.

In addition, no bad odor was emitted from the device, and the amount of drainage water for cleaning the filter material was 1.6 J/min, regardless of the concentration of sulphate in the raw water, maintaining a smooth and sufficient filtering function. The indoor environment was good, with no noise sources and no foul odors emitted from the equipment.

[Brief explanation of the drawing]

Figure 1 shows the configuration of one embodiment of the present invention. Figure 2 shows the configuration of another embodiment. Raw water tank B Drainage tank C Filtration treatment tank 1 Raw water pump 2 Raw water pressure inlet 3 Sediment layer with filtration 4 Washing pump 5 Water type ejector 6 Cyclone type sund separator, a- 7 Distribution case with filtration 8 Re-separation tank diagram - 1 K Masu diagram - 2

Claims (1)

[Claims] A cyclone-type sand separator is installed in the main body of the filtration device, which injects a mixture of filter media and captured sludge suspended in water, and takes out the suspension of sludge from the upper flow and the suspension of the filter media from the underflow. It is characterized by being installed on one side and having a water flow ejector on the other side. In configuring the whole, the mixture of filter media and sludge that has completed the filtration operation is suctioned and discharged by the ejector, guided to the sand separator through piping, and the underflow of the sand separator is discharged after the filtration process inside the filtration device body. Water that has been filtered through the layer of filter media is taken out by means of distributing it to the top of the filter media that is mixed with the water body and deposited in the filter tank, and by injecting raw water into the layer of filter media that passes upward through the layer of filter media. A filtration device that employs means.