KR20060106069A - Upward flow type multi-stage filter apparatus - Google Patents

Abstract

The present invention is an upflow filtration device that can easily and easily remove the filtered contaminants, and includes a sewage storage portion and a filtration chamber, each of which is divided into multiple stages by a first partition wall and a second partition wall. And a filtration tank partitioned by a filtered water discharge passage, and a lower portion of the first partition wall is formed to communicate with a lower portion of the filtration chamber, wherein the first partition wall is set higher than the second partition wall. In addition, the upper filtration unit and the lower filtration unit is disposed in the filtration chamber, and the upstream multistage filtration apparatus in which a conduit with a backwash valve is connected to a predetermined portion of the circumference of the filtration tank.

Filtration, water purification, upflow filtration,

Description

Upflow type multi-stage filter apparatus

1 is a perspective view showing a configuration of a filtration device according to the present invention.

2 is a side cross-sectional view of FIG.

<Description of the symbols for the main parts of the drawings>

2: filtration tanks 4a, 4b, .. 4n: sewage storage tank

6: 1st partition 8a, 8b .. 8n: filtration chamber

10: drainage channel 12: second partition wall

14: inlet pipe 14a, 14b .. 14n: branch pipe

16: drain pipe 17: air supply valve

18: air inlet 20a, 20b .. 20n: backwash valve

22a, 22b .. 22n: conduit 26: channel

28: lower layer filtration unit 30: lower layer filtration unit

32a, 32b .. 32n: nozzle 34: level sensor

36: controller

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration apparatus suitable for a water treatment plant, and more particularly, to an upflow multistage filtration apparatus for purifying by filtering a filtered water containing a large amount of suspended solids such as sewage, wastewater, domestic sewage, etc. from the bottom up.

Wastewater treatment facilities are equipped with various filtration devices for the purification of water, and particularly, activated carbon, sand, micro-filters, etc. are commonly employed as a method of reusing filter media with excellent filtration performance.

The filter device employing the activated carbon and sand as the filter medium has a configuration in which waste water is introduced upwards and filtered by gravity, so that the structure is simple and the capacity can be increased. The treatment is cumbersome and inefficient, and the degree of filtration is low.

The micro filter has an advantage of filtration degree and efficiency because it is a method of forcibly filtration by applying pressure to the filtered water, but the installation cost and maintenance cost is expensive and is used as a filtration means of the water purification stage.

It is an object of the present invention to provide an upflow multistage filtration device which is low in installation cost and can easily remove filtered contaminants to facilitate maintenance.

The present invention, which implements the above object, is a bottom-up filtration system for flowing the waste water from the bottom of the filter medium, the filter medium is the lower layer filter portion of the material that is easy to separate the contaminants, and the upper filtration non-separation arrangement of high filtration degree It is an upflow type multi-stage filtration device that allows the filtered contaminants to be deposited under the lower filtration section, thereby allowing easy collection periodically.

The present invention is divided into a sewage storage portion and a filtration chamber, and a filtered water discharge passage, the interior of which is divided into multiple stages by the first and second partition walls, and the lower portion of the first partition wall communicates with the lower portion of the filtration chamber. The first partition is set higher than the second partition, and the upper filtration part and the lower filtration part are accommodated in each said filtration chamber, and the outer periphery of each said filtration tank is predetermined, At the point, the conduit with a backwash valve is connected.

In addition, the present invention may be further provided with an air inlet tube having an air supply valve on the side of the filtration tank, by providing a plurality of nozzles disposed at the end of the air inlet tube facing the lower surface of each of the lower filtration unit, The compressed air may be blown to the underside of the lower layer filtration unit from the outside to further include a structure capable of promoting the removal of the deposited contaminants.

The upper filtration unit may use a fixed media such as sand, activated carbon, etc. as the media, and the lower filtration unit may be composed of a fluidized bed media united with a thread to form a circle of a predetermined diameter.

Hereinafter, the present invention will be described in detail by way of preferred embodiments in accordance with the accompanying drawings.

1 is a perspective view showing the configuration of a filtration device according to the present invention, in which a filtration tank 2 having a predetermined size is provided, and the sewage storage portions 4a, 4b,... 4n in multiple stages inside the filtration tank 2. The second partition 12 which partitions the filtration chambers 8a, 8b... 8n in multiple stages and also the filtrate discharge passage 10 which is formed by a single passage | paragraph also divides | separates It is equipped.

Wastewater is discharged from each of the sewage reservoirs 4a, 4b through branch pipes 14a, 14b .. 14n with valves Va, Vb .. Vn in an inlet pipe 14 communicating with the outside of the filtration tank 2. 4n) is filtered and the treated water is collected in the discharge path (10) and sent to the next process through the drain pipe (16).

In the configuration of the present invention, the height of the second partition 12 must be set lower than that of the first partition 6.

An air inlet pipe 18 having an air supply valve 17 communicates with a side surface of the filtration tank 2, and an external lower side of the filtration tank 2 corresponds to each filtration chamber 8a, 8b... 8n. Thus, conduits 22a, 22b .. 22n with backwash valves 20a, 20b .. 20n are connected.

In this embodiment, the side of the filtration tank (2) is provided with a view window 24 that can be seen as the inside, but is not necessary.

FIG. 2 is a side cross-sectional view of FIG. 1, in which the first partition 6 has its lower end corresponding to each filtration chamber 8a, 8b... 8n below each sewage storage tank 4a, 4b. ), And has a distribution channel 26 for communication.

In addition, the filtration chambers 8a, 8b... 8n) include an upper filtration part 28 made of fixed media such as sand and activated carbon, and a lower filtration part in which numerous fluidized bed media made of circular thread having an appropriate diameter are housed. 30) and nozzles 32a, 32b .. 32n branched at the end of the air injection pipe 18 are arranged at the bottom of each lower filtration section 30 at a corresponding position.

According to the present invention having the above-described configuration, the wastewater is supplied through the inlet pipe 14 while the air supply valve 17 and all the backwash valves 20a, 20b. The filtration begins by doing so.

If only the branch pipe 14a of the inlet pipe 14 is opened initially and the wastewater is supplied, the wastewater is filled with the wastewater storage tank 4a, where the lower layer of the filtration chamber 8a through the lower flow passage 26a. It flows to the bottom of the filtration section 30, and the floating material, which is mixed in the water by the action of hydraulic pressure in the upstream, is filtered while being filtered by the lower filtration section 30.

The lower filtration unit 30 has a myriad of fluid bed mediators having a certain diameter, so when there is no flow, the fluid filtration media settles to the bottom of the lower filtration section 30, but when the wastewater flows, It floats upward according to the flow and overlaps with the upper layer of the lower filtration part 30, and as a result, a circular thread deforms into an ellipse by water pressure, and narrows the space | interval between adjacent ones, and it contains in water It exhibits a filtration action that prevents the contaminant from passing through, so that the contaminant that has not passed through the lower filtration unit 30 adheres to the surface of the filter medium or floats together.

In addition, the filtered treated water is filled with clear water only to the upper layer of the filtration chamber 8a while secondary particles are not filtered through the upper filtration unit 28, and the second partition 12 is filled with air. The ride is overflowed and flows through the drainage path 10 and is discharged through the drain pipe 16.

On the other hand, if excessive contaminants adhere to the fluidized bed media of the lower filtration section 30, the filtration efficiency rapidly decreases, and this phenomenon appears as a stagnant upstream flow of wastewater, and the fluidized bed media with contaminants adhered to the surface. The water sinks to the bottom of the lower filtration part 30, and the water level of the sewage storage tank 4a is increased.

In the present invention, when the water level of each sewage storage tank (4a, 4b .. 4n) increases more than a certain level, it detects this and backwash the corresponding lower filtration section 30 in the filtration chamber (8a, 8b .. 8n). have.

That is, when the level sensor 34 detects the water level and inputs an alarm signal to the controller 36 as shown in FIG. 3, the controller 36 corresponds to an alarm signal among the branch pipes 14a, 14b... 14n. The valve (Va, Vb .. Vn) of the one is cut off, the corresponding one of the air supply valve (17) and the nozzles (32a, 32b .. 32n) is opened so that compressed air is supplied to the bottom of the lower filtration unit (30). When the fluidized bed media is vibrated by the compressed air droplets, the contaminants adhering to the surface are washed off, and the corresponding ones in the backwash valves 20a, 20b .. 20n are opened to filter the lower layer. The back side wastewater from the lower part of the part 30 and the contaminants that have been washed off are backwashed, and then the valve Vb mounted on the branch pipe 14b in the next step is opened to the sewage storage tank 4b disposed adjacent thereto. The waste water is supplied so that the filtration as described above is repeatedly controlled. .

In this filtration action, the compressed air supplied through the air supply valve 17 is not necessarily required for back washing, and this compressed air only has the advantage of promoting the cleaning of contaminants.

The present invention as described above allows the waste water to be circulated in an upflow manner through which the wastewater passes upward from the bottom of the filtration layer so that the contaminants are filtered out and stayed under the lower filtration, and the filtered contaminants are discharged to the outside through the backwash valve. As it is possible to install at low cost, it is easy to manage and wash the filter media, and the maintenance cost is low, and the structure of the wastewater can be continuously filtered. There is this.

Claims (4)

A sewage storage portion and a filtration chamber partitioned into multiple stages by a first partition and a second partition, and a filtrate discharge passage, and a lower portion of the first partition is a lower portion of the filtration chamber corresponding to each of the sewage storage portions. And a filtration tank having a flow path for communicating therewith, wherein the first partition is set higher than the second partition, and an upper filtration part and a lower filtration part are housed in each of the filtration chambers, and a predetermined circumference of the filtration tank is provided. The upstream multistage filtration device is configured to communicate with a backwash valve in correspondence with each filtration chamber. The air inlet tube having an air supply valve communicates with a side surface of the filtration tank, and a plurality of nozzles are arranged in multiple stages at the end of the air inlet tube so as to correspond to the bottom filtration section of each filtration chamber. Upstream multistage filtration device, characterized in that it further comprises a constitution to blow the compressed air from the outside to the bottom of the lower filtration unit to remove contaminants stuck to the fluidized bed medium of the lower filtration unit. The upstream multistage filtration device of claim 1, wherein the upper filtration part is made of sand and activated carbon. The upflow multistage filtration device according to claim 1 or 2, wherein the lower filtration part is composed of a circular thread having a predetermined diameter.

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