JPH07114887B2 - Floating cleaning device for filtration material using filtration material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a wastewater treatment device using a floating material, and in particular, a solid material trapped in a material layer is used as a material by utilizing the buoyancy of the material layer. In addition, the present invention relates to a material cleaning device in an excess machine for extracting and cleaning the material, supplying the cleaned material to the material layer again, and treating the wastewater.

[Prior art]

Conventionally, there is a device that stores the floating material in a sealing machine, supplies raw water in a downward flow, scrapes out the contaminated material in the upper layer to the outside, floats it, and circulates and cleans the floating material with a pump. (For example, Japanese Patent Publication No. 63-21553).

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional device, since the raw water comes into contact with the levitation material in a counterflow, the solid matter can be captured well, but the levitation material provided with the material trapping the solid matter on the outside. When the material was scraped out to the collecting part and the material was floated by the buoyancy, the solid matter was peeled from the material and settled in the collecting part of the floating material on the side of the material layer, and this precipitate could not be taken out. Further, since the machine is sealed, it is necessary to make the machine itself robust by applying water pressure.

[Means for Solving the Problems]

This invention has solved the above-mentioned conventional problems, and its gist is to store a floating material in a treatment tank to form a material layer, and to supply raw water in a downward flow to remove wastewater. In a machine that circulates and cleans the contaminated material, bury the raw water supply pipe in the upper part of the material layer, connect the treated water pipe to the lower part of the treatment tank, and connect the rear end of this treated water pipe. In addition to standing up in the vicinity of the raw water supply pipe, an inclined guide plate is provided on the upper part of this material layer, and a material circulation cleaning device is installed opposite to the top of this guide plate.

[Action]

That is, the present invention is configured as described above, when the raw water is supplied to the treatment tank in a downward flow, the raw water flows down the consolidated material layer, and solid matters such as suspended matter and sludge in the raw water are The liquid captured between the materials and separated from the solid content passes through the material layer and is taken out from the treated water pipe. On the other hand, the material forms a material layer in a consolidating manner in the treatment tank by its buoyancy, but the material in the upper layer part of the material layer that has captured the solid content is pushed up to the water surface by the buoyancy of the material layer in water. And the polluted light material that has lost the resistance and buoyancy of water in the air,
While being pressed against the back surface of the guide plate by the pushing force of the material layer in water, the material layer is guided to the top of the guide plate and fed into the material cleaning device. The impurities trapped in the material are separated by the cleaning device. The regenerated material is supplied below the treatment tank, and due to its buoyancy, it floats below the material layer to form another material layer and at the same time pushes the contaminated material above the material layer above the water surface.

〔Example〕

When the embodiment of the present invention is described in detail with reference to the drawings, reference numeral 1 is a processing tank, and a fine floating material 2 having a specific gravity of 1.0 or less is stored in the processing tank 1. The consolidated material layer 3 is formed. Reference numeral 4 is a raw water supply pipe, which is embedded in the upper portion of the material layer 3. Reference numeral 5 denotes a treated water pipe, which is connected to the lower side wall of the treatment tank 1 so that the rear end portion of the treated water pipe 5 rises up to near the lower part of the raw water supply pipe 4, and the water level in the treatment tank 1 is It is arranged below the raw water supply pipe 4. Then, the raw water is supplied from the raw water supply pipe 4 in a downward flow, and while flowing down the material layer 3, the solid content is captured between the materials 2 and 2, and the separated liquid flows down between the materials 2 and 2. , Is extracted from the treated water pipe 5 below the material layer 3. On the other hand, the material layer 3 floats upward due to the buoyancy of the material 2 having a low specific gravity, and the material layer 3 that has captured the solid matter in the upper layer is pushed up by the material layer 3 in the water below and floats above the water surface. come. The material 2 on the surface of the water loses its buoyancy and resists water. The raw water supply pipe 5 on the water surface is embedded in the material layer 3 in the air that has been pushed up. Reference numeral 6 is a guide plate provided in the upper part of the processing tank 1, which is arranged in a conical shape, and has an opening 7 for venting air at the top thereof. Then, the upper layer portion of the material layer 3 is guided by the pushing force of the material layer 3 in water to the guide plate 6
The light material 2 on the upper surface of the material layer 3 which is pressed against the back surface of the guide plate 3 where water resistance and buoyancy does not work is moved along the inclined surface of the guide plate 6. Reference numeral 8 denotes a circulation cleaning device for the material 2, which is erected upright in the processing tank 1 and has an upper end 8a near the lower portion of the opening 7 at the top of the guide plate 6 and a lower end 8b thereof. 1 is opened below the material layer 3. The upper end 8a of the circulation cleaning device 8 is formed in a funnel shape, and is moved to the top of the guide plate 6 so that the upper end of the circulation cleaning device 8
The material 2 extruded to the opening of 8a is easily dropped into the circulation cleaning device 8. Below the upper end 8a of the circulation cleaning device 8, an auger 9 for pushing the falling material 2 downward, and a cleaning nozzle for cleaning the pushed material 2
10 is provided, and the material 2 is pushed downward by the water pressure of the cleaning nozzle 10 to remove foreign matters and adhered substances trapped between the materials 2 and 2 by the water flow, and the lower end of the circulation cleaning device 8 is provided.
It is designed to be discharged from the opening of 8b. The regenerated material 2 floats to the lower bottom portion of the material layer 3 due to its buoyancy, forms the material layer 3 again, and pushes the upper material layer 3 above the water surface. Reference numeral 11 is a drainage pipe for discharging the separated solid matter, reference numeral 12 is an air vent pipe provided at the rear end of the treated water pipe 5, reference numeral 13
Is a driving machine of the auger 9. Incidentally, as another embodiment of the material cleaning apparatus of the present invention, the top of the slanted guide plate is opposed to the opening provided in the side wall of the processing tank, and the material dropped from this opening is cleaned in the cleaning tank. It may be returned to the processing tank from here by a pump or the like. When it is desired that the material layer 3 have a biological treatment function in addition to solid-liquid separation, an air diffuser may be embedded in the lower layer portion of the material layer 3.

〔The invention's effect〕

The present invention is configured as described above, the solid matter trapped between the materials, because the buoyancy of the material layer under the water surface together with the contaminated material, it is pushed up on the water surface in a consolidated state, the material Solid matter trapped between them does not fall into the liquid surface. Since the solid matter pushed up by the material layer below the water surface is pushed up above the raw water supply pipe, it remains in the air and is not dissolved by the undiluted solution. Also, since the material with a low specific gravity pushed up above the water surface does not have buoyancy or water resistance, it is collected on the top of the guide plate along the back surface of the guide plate due to the pushing force of the material layer below the water surface. The solid matter trapped between the materials and the contaminated material can be reliably extracted from the processing tank by utilizing the buoyancy of the material. Moreover, in the invention of the present application, since the upper part of the processing tank can be opened to the atmosphere, water pressure is not applied unlike the conventional sealed processing tank, and the weight can be reduced.

[Brief description of drawings]

The drawing is a vertical cross-sectional side view of a material cleaning device in a transit machine using a floating material according to the present invention. 1 treatment tank, 2 materials, 3 material layers, 4 raw water supply pipe, 5 treatment water pipe, 6 guide plate, 8 circulation cleaning device

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Claims (1)

[Claims] 1. A material layer 3 containing a floating material 2 in a processing tank 1.
In a machine that treats sewage by supplying raw water in a downward flow and circulates and cleans the contaminated material 2, a raw water supply pipe 4 is embedded above the material layer 3 to form a treatment tank. The treated water pipe 5 is connected to the lower part of 1 so that the rear end of the treated water pipe 5 rises near the raw water supply pipe 4, and an inclined guide plate 6 is provided on the upper part of the material layer 3 A material cleaning device for a machine using a floating material, in which a circulating cleaning device 8 for the material 2 is provided on the top of a plate 6.