KR200238938Y1 - Back flesh and filter Apparatus Using Influent Water Head - Google Patents

Abstract

The present invention relates to a filtration device and a backwashing device for removing solids contained in sewage or water, wherein the filter medium is filled with a particulate filter therein, and a support layer is provided below the filter bed. Two or more filtration cells overlap each other, and each of the filtration cells is provided with a raw water inlet, and the lower water collecting part communicates with each other so that the filtration water communicates with each other, thereby forming a filtration device so that filtration can proceed simultaneously in a plurality of filtration cells. In the filtration cell which requires this accumulation and backwashing, the filtration water and the backwashing device are configured to wash the solids in the filter bed and discharge the effluent by gravity while the filtrate filtered in the other filtration cells undergoes filtration. According to the present invention, since the backwashing is alternately performed in one or a few of the filtration cells while the filtration progresses in a plurality of filtration cells, the variation in the filtration flow rate and pressure is small, the power is saved, and the configuration of the filtration device is simple and the operation rate Can be kept high.

Description

Filtration and backwashing apparatus using filtered head {Back flesh and filter Apparatus Using Influent Water Head}

The present invention relates to a filtration device for separating solids from sewage and wastewater treatment facilities, and more specifically, even in the state of filtration in a plurality of filtration cells filled with particulate media such as sand and anthracite. Alternatively, since a few filtration cells are configured to be backwashed in parallel, the present invention relates to a filtration apparatus and a backwashing apparatus capable of maintaining small changes in filtration flow rate and filtration pressure, saving power, and maintaining a high operation rate.

Conventional pressure filtration device has to stop the filtration for backwashing, so the operation rate of the device is low, the flow rate and pressure change is large, there is a lot of power consumption problems.

ABW filtration device composed of a plurality of filtration cells has the advantage of high operating rate and small flow rate and pressure change because the backwash is alternately performed in one filtration cell even while the filtration in a plurality of filtration cells.

However, in the conventional ABW filtration device, the backwash water pump is suspended in the bridge moving along the rail by the driving device to sequentially feed the filtrate water from the bottom of each filtration cell. In addition, by the suction power of the hood (HOOD) and the effluent water extraction pump that is suspended and moved on the same bridge is a structure to suck and discharge the effluent water from the upper part of the filtration cell to which the filtration water is pumped.

As described above, the ABW filtration device has a high driving force because two pumps for pumping and suction are operated, and there are many driving parts such as a pump and a moving device. In particular, since the raw water flowing into the filtration apparatus is also mixed into the backwash water through a gap between the hood and the filter cell wall, there is an uneconomic problem in that the filthy water flow rate caused by backwashing is excessively generated. The discharge port of the backwash water pump is suspended on the moving bridge and moves together with the multiple filter water outlets in the lower part of the filtration cell. It can also be a cause of defects.

In addition, since the lower part of each filtration cell is a watertight structure and the upper part is a structure in which raw water is exchanged with each other, it is impossible to separately select and filter back the filtration cells requiring back washing. Therefore, in the conventional AWB filtration device, there is an inefficient problem that all the filtration cells must be backwashed sequentially and consistently.

In addition, in the conventional filtration apparatus including the AWB filtration apparatus, as the filtration proceeds, the solid filtered on top of the filtration phase forms a thin layer and is condensed so that the inflow of the raw water does not pass through the filtration phase and the backwash cycle is very short. This phenomenon is more common in slow filtration.

In order to solve the above problems, the present invention aims to provide a filtration method using a filtration method and a backwashing method in which one or a few filtration cells perform backwashing in a state where filtration proceeds in a plurality of filtration cells. It is done.

The present invention for achieving the above object is filled with a particulate filter in the interior is composed of a filter bed, the lower portion is provided with a support layer for supporting the filter bed is composed of two or more and a plurality of overlapping, Filtration cells are provided with the inlet and the outlet of the raw water and the sewage water, the lower catchment portion is communicated to communicate the filtered water to each other, the raw water inlet and the sewage outflow passage is connected to the outlet of the raw water and the contaminated water, the raw water inlet And contaminated water outflow channel is provided with a flow path control means.

1 is a conceptual diagram of a filtration and backwashing device according to the present invention,

Figure 2 is a perspective view showing a first embodiment of the filtration device according to the present invention,

3 is a perspective view showing a second embodiment of the filtration device according to the present invention.

Explanation of symbols on the main parts of the drawings

1, 1a: filter cell 2, 2a: filter phase

3: support layer 4: water collecting part

5: filtered water tank 7: bridge

8 scraper 9 drive unit

11: raw water inlet 12, 12a: raw water inlet

13, 13a: Raw water inflow control means 21: Sewage water outflow

22, 22a: Sewage outflow outlet 23, 23a: Sewage outflow control means

24, 24a: underwater orifice 25, 25a: three-way flow control means

30: filtered water outflow channel

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic partial cutaway perspective view showing a filtration device and a backwashing device according to the present invention.

Filtration device according to the present invention is composed of a plurality of series of filtration cells (1, 1a) that can be filtered at the same time and the raw water inlet flow path 11 and fouling so that raw water flows into the upper portion of each filtration cell (1, 1a) The sewage water outflow passage 21 through which water flows out is provided, and the water collecting unit 4 below each of the filtration cells 1 and 1a communicates with each other so that the filtrate is exchanged and the filtrate water flow passage 21 is provided. Characterized in that it comprises a 5).

As the filtration proceeds, the filtration cells (1, 1a), in which solids accumulate and require large filtration pressure, are provided with raw water inflow control means and dirty water outflow control means for blocking the inflow of raw water and allowing the effluent to flow out.

As the solids accumulate in the filter bed (2.2a) and the back washing is necessary, the water level of the filter cells (1, 1a) is also increased. Therefore, a level sensor is installed in each filter cell (1,1a) in conjunction with the water level sensor. Raw water inflow control means and contaminant outflow control means are operated and backwashing can proceed.

In addition, in the present invention, the consolidation of the solid formed on the surface by scraping the surface of the filter in order to solve the problem of shortening of the backwash cycle by the consolidation layer of the filtered solid having a very low permeability coefficient on the top of the filter bed (2,2a). By removing and disturbing the bed or by disturbing the surface layer of the filter bed (2,2a), it is possible to prevent a sudden decrease in the filtration rate and to extend the backwash cycle, thereby increasing the utilization rate of the filtration device and increasing the amount of filthy water generated by the backwash. Can be reduced.

In addition to the simple sieve function, the filtration may separate and remove the solids due to adhesion and adsorption. Thus, when the surface portion of the filter bed 2,2a is disturbed in a slow manner, the solids contact the media inside the filter bed 2,2a. Since the opportunity is increased, it is possible to increase the removal efficiency of the solids by the attachment function.

This corresponds to a method for increasing the filtration efficiency unlike the conventional backwashing method in which the solids attached to the surface of the media are removed by applying a strong shearing force by giving up or disturbing the filter during backwashing.

As shown in FIG. 1, the filter medium (1, 1a) is formed by filling the filter medium (2, 2a) is filled with a particulate filter therein, and a support layer (3) for supporting the filter bed at the bottom thereof. ) Are two or more overlapping, and the filtration cells are provided with raw water inlets 12 and 12a, respectively, and the lower collecting portion 4 of the filtration cells communicates with each other so that the filtration water communicates with each other. It is configured to proceed, the solids accumulate and the backwashing is required to filter cells (1a) first to close the raw water inlet control means (13a) to stop the raw water inlet.

Opening the contaminated water outflow control means (23a) provided in the contaminated water outflow passage 21 of the filtration cell in which the raw water inlet is stopped, the water level is lowered due to natural flow, so that the filtered water is filtered in another filtration cell in which the filtration proceeds. The solids are washed in the filter bed (2a) while the counter-flow rises to the filter cell (1a) of the backwashing step of the water level is lowered.

Waste water generated by washing the solids is discharged to the outside by gravity through the open wastewater outflow channel, and backwashing is performed on the filter.

The filthy water outflow channel of the filtration cell after the backwashing is completed is sealed, and the water level rises to the original state, and stabilization of the expanded bed by the backwashing is settled.

After the stabilization of the filter bed, the raw water is introduced into the filtration cell to resume filtration, and the above process is repeated to select the filtration cell in which the solids are accumulated and proceed with backwashing.

Here, the dirty water generated in the filtration cell (1a) that is backwashing may be installed in the wastewater outflow channel and discharged by using the suction head of the pump, and when the filtration water level is low and the backwash head is insufficient It is an advantageous method.

In addition, the backwash cycle can be shortened and the filtration efficiency can be increased by disturbing the surface layer portion of the filtration phase, i.e., removing or disturbing the consolidation layer formed on the surface.

In the present embodiment, the stirring means in the form of a scraper 8 suspended on the bridge 7 of the structure moved by the drive unit 9, but such a stirring method is not limited to mechanical methods such as a rake, scraper, etc. Hydrodynamic methods of ejecting air or water may also be used.

In this way, the method of stirring the filter bed can increase the filtration efficiency as well as increase the backwashing efficiency. If a scheme skimmer (not shown) is attached to the stirring means, the surface of the filter bed without forming a separate device can be obtained. Scum floating on the top can be easily removed.

Each filtration cell can be configured separately from the raw water inlet and the effluent outlet, which can be configured on the upper side of the filtration cell, but as shown in FIG. 1, the filthy water discharge is configured to be made through the raw water inlet. By omitting the flow path, the flow path can be configured more simply.

Figure 2 is a schematic partial cutaway perspective view showing a first embodiment of a filtration device according to the present invention.

In the present embodiment, the filtration apparatus is adapted to apply a device capable of variously changing the direction of the flow path by a single flow control means such as a three-way valve at a portion in contact with the raw water inflow flow path and the wastewater flow out flow path. When the flow path adjusting means can be configured in a simple manner than in the embodiment of FIG. 1, the configuration of the apparatus will be described in detail as follows.

There are two or more filtration cells (1, 1a) composed of a filter medium (2, 2a) is filled in the interior of the granules and a support layer (3) for supporting the filter bed at the bottom The filter cells are superimposed and provided with raw water inlets 12 and 12a, respectively, and the lower collecting part 4 of the filter cells communicates with the filtered water to communicate with each other so that the filtration can be performed simultaneously in a plurality of filter cells. In the raw water inlet, the raw water inflow passage 11 and the dirty water outflow passage 21 are connected, and the three-way flow control means such as a three-way valve at the point where the raw water inflow passage and the dirty water outflow passage intersect (25, 25a) may be provided, and the upper inlet of the filtration phase may be provided with an underwater orifice (not shown) by a perforated pipe or the like for evenly distributing the flow rate. By the operation of the three-way flow path adjusting means, the raw water is introduced into the filtration cell during filtration and when the backwash is stopped, the flow path is changed so that the raw water is stopped and the effluent is discharged, so that filtration and back washing are performed.

The filthy water outflow channel of the filtration cell after the backwashing is completed is sealed, and the water level rises to the original state, and stabilization of the expanded bed by the backwashing is settled. After the stabilization of the filter bed, the raw water is introduced into the filtration cell to resume filtration, and the above process is repeated to select the filtration cell in which the solids are accumulated and proceed with backwashing.

Stirring means (not shown) for disturbing the consolidation layer of the solid formed on the surface of the filtration or disturbing the surface layer of the filtration is constituted by a device such as a rake or a blade suspended on a bridge or a chain, or connected to a blower or a pump. It is possible to use a diffuser or a nozzle, such a stirring means can be applied to a conventional industrial machinery, water treatment apparatus, so a detailed description thereof will be omitted.

Figure 3 is a schematic partial cutaway perspective view showing a second embodiment of the filtration device according to the present invention.

In the present embodiment, the filtration apparatus is provided with a raw water inflow passage 11 and a dirty water outlet passage 21 in the form of water channels on the left and right sides of the filtration cells, respectively, and the raw water inlets 12, 12a and the wastewater outlet 22, 22a. ) Is provided with raw water inflow control means (13) and dirty water outflow control means (23, 23a) in the form of a gate (Gate). The raw water inlet is opened to the filtration cell in which the filtration proceeds, and the wastewater outlet is closed, and the raw water inlet 13a is sealed to the filtration cell 1a in which the backwashing is progressed, and the wastewater discharge control means 23a is operated. The outlet 22a is open.

The flow passages 11 and 21 and the flow control means 13 and 22 are not limited to the channel and the sluice and may be configured in various ways such as an irrigation channel and a valve. It also works in conjunction.

As described above, when the filtration method and the filtration device according to the present invention are used for treating wastewater or water containing solids, the following effects are obtained.

① As the reverse chuck continues without stopping filtration, the required pressure and filtration flow rate for filtration and backwash are small and uniform.

② The configuration of the device is simple and the failure rate is low because filtration or backwashing is performed only by the operation of the flow path.

③ The operation rate of the device is high because a small number of filter cells that need to be backwashed in a plurality of filter cells can be selected and backwashed alternately.

④ Since backwashing is continued even in the filtration state, the flow rate and pollution load are almost uniform, so the wastewater treatment is easy and the scale of the wastewater treatment facility is economical.

⑤ Excellent filtration and backwashing efficiency and low power consumption.

Claims (3)

The filter medium (2, 2a) is formed by filling the granular media therein, and at least two or more filtration cells (1, 1a) comprising a support layer (3) for supporting the filter bed in the lower portion The dogs are overlapped, and the filter cells are provided with an outlet of raw water and wastewater, and the lower collecting portion communicates with the filtrate to communicate with each other, and the raw water inflow passage and the wastewater discharge passage are connected to the outlet of the raw water and the wastewater. And, the filtering device, characterized in that the raw water inlet flow path and the dirty water outflow path is provided with a flow path control means. 2. A stirring device such as a rake or a scraper as set forth in claim 1, characterized in that an upper portion of the filter bed (2, 2a) is provided with a rake or scraper to remove and disturb the consolidation layer of solids formed on the surface of the filter bed or to disturb the surface layer of the filter bed. Filtration device characterized in that. The filtration apparatus according to claim 2, wherein the stirring means is a diffuser in which air is blown out or a nozzle in which water is fountaind.