KR20130130274A - Apparatus for filtering used with multi-fiber layer and the backward wash method thereof - Google Patents

Abstract

The present invention relates to a filtering device using a multi-fiber layer comprising a main body, a filter layer, a fixed holder, a moving holder, and an air tank and a backwashing method thereof. The main body has an inlet for raw water formed at one side thereof and an outlet for treated water formed at the other side. The filter layer is inserted into the main body to vary according to the pressure of water or air during filtering or backwashing, and has fibers with different thicknesses forming a multi-fiber layer with identical pores to be separated into a plurality of particle removal layers. The fixed holder is fixed to the side of the outlet for treated water of the main body and fixes one end of the filter layer. The moving holder fixes the other end of the filter layer and moves according to the pressure of water or air. The air tank injects air into the filter layer through the fixed holder during backwashing and the inside of the air tank is divided into a plurality of spaces by confining panels. Air is introduced into the filter layer during backwashing in different ratios according to the particle removal layers. Accordingly filtering efficiency is improved, a long-term filtering process is enabled, backwashing time is reduced, and a waste of backwashing water is reduced by filtering and backwashing after forming fibers with different thicknesses into the multi-fiber layer with identical pores and separating the filter layer into a plurality of particle removal layers.

Description

Filtering apparatus and backwashing method using a multifiber layer {Apparatus for filtering used with multi-fiber layer and the backward wash method

The present invention relates to a filtration device using a multifiber layer and a backwashing method thereof, and more particularly, to form a multifiber layer having different thicknesses in the same pores, and to separate and install a filter layer as a plurality of particle removing layers, thereby providing a high concentration of raw water. The present invention relates to a filtration device using a multifiber layer and a method for backwashing, which have high filtration efficiency at the time of filtration, enable a long-term filtration process, shorten backwash time, and reduce waste of backwash water.

Suspended solids contained in fluids (especially water) for filtration of suspended solids in water treatment of water purification plants, pretreatment before advanced treatment of various wastewaters (ie activated carbon, ozone, photocatalysts, membrane separations), or water treatment for recycling purposes. Micro filter is used to filter this. In addition, various filtration devices are used in general household water purifiers.

The precision filtration device used for this purpose is manufactured to have a certain size of the pores of the filter to perform the filtration, so if the pores are blocked by the filtered contaminants after a certain time of operation, the backwash is impossible or the recovery rate of the backwash is extremely low. Precision filtration equipment had to replace the filter at regular intervals.

The reason for this decrease in backwashing efficiency is that the voids do not change even during backwashing as in filtration. As a result, the backwashing efficiency is low because the contaminants caught in the air gap of the filter are not easily cleaned.

In order to solve this problem, the suspended solids contained in the fluid (especially water) can be filtered with high accuracy by changing the air gap of the filter layer during filtration and backwashing, and excellent cleaning during backwashing with air pressure and fresh water A filtering device having a variable filter layer having efficiency is disclosed in Korean Patent No. 10-0241198, Korean Patent No. 10-0585490, and the like.

In a conventional filter device having a variable filter layer, the fiber yarn (fiber) filter is compressed downward, and the pores of the filter layer are made of a constant depth filter, and the filtration proceeds, and the back washing is expanded by backwashing. The depth filter is a filter that traps foreign matter in the gaps between the filter media. Since the depth filter has a large amount of foreign matter to be collected, it is also used for relatively contaminated filtration.

However, in the conventional filter device having a variable filter layer, since the fiber yarn filter has a constant thickness, clogging is rapidly progressed by large particles (floating solids) at the beginning of the filtration, so that the filtration efficiency is low and backwashing must be frequently performed. There was a problem with severe backwashing time.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a filtration device using a multi-fiber layer having a high filtration efficiency and a filtration process for a long time when filtering a high concentration of raw water. .

Another object of the present invention is to provide a backwashing method for a filtration apparatus using a multifiber layer which reduces the backwashing time during backwashing and reduces waste of backwashing water.

In order to achieve the above object, a filtration device using a multifiber layer according to the present invention includes a main body having a raw water inlet formed on one side thereof and a treated water outlet formed on the other side thereof, and inserted into the main body to receive water pressure and air pressure during filtration or backwashing. A filter holder which is variable according to the above, a fixed holder fixed to the treated water outlet side of the main body and fixedly connecting one end of the filter layer, a moving holder fixedly connecting the other end of the filter layer to move in the main body according to water pressure or air pressure, and backwashing. It includes an air tank tank for introducing air into the filter layer through the fixing holder, the filter layer is composed of a multi-fiber layer with the same pores of different thickness fibers separated by a plurality of particle removal layer, the inside of the air tank tank At the time of injection, the air injected through the air inlet is rotated so that the air flows into the filter layer through the fixing holder. It is separated into a plurality of spaces by plates.

The plurality of particle removal layers are formed of a micro particle removal layer mounted inside the filter layer to remove microparticles and a macro particle removal layer mounted outside the filter layer to remove macroparticles.

The plurality of particle removal layers include a fiber layer having a fiber thickness of 0.8 μm to 1.2 μm, and a fiber particle layer having a thickness of 4 μm to 6 μm and a fiber layer having a thickness of 4 μm to 6 μm. The intermediate layer removing layer and the fiber layer is formed with a fiber yarn thickness of 8㎛ ~ 12㎛ can be formed as a macroparticle removal layer mounted on the outermost.

The fixed holder is provided with a plurality of air inlets for introducing air into the filter layer, and the plurality of air inlets provide air between the first air inlet for introducing air into the fine particle removing layer and between the fine particle removing layer and the intermediate particle removing layer. And a second air inlet for introducing air, and a third air inlet for introducing air between the intermediate particle removing layer and the macroparticle removing layer.

In the backwashing method of the filtration apparatus using the multifiber layer according to the present invention, the filter layer of the multifiber layer is formed with the same porosity of the fiber yarns of different thicknesses, but the finest in the innermost part of the filter layer with the fiber yarn thickness of 0.8 μm to 1.2 μm. A particle removal layer is formed, an intermediate particle removal layer is formed in the middle of the filter layer with a fiber thickness of 4 μm to 6 μm, and a macro particle removal layer is formed at the outermost part of the filter layer with a fiber thickness of 8 μm to 12 μm. Then, the raw water is filtered through the filter layer, followed by backwashing by injecting air and backwashing water into the filter layer, and introducing 47-53% of the air into the fine particle removing layer, and removing the fine particle removing layer and Between the intermediate particle removal layer is introduced into the air of 28-32% of the total amount of inlet air, and between the intermediate particle removal layer and the macroparticle removal layer is introduced by 19-21% of the air in the entire inlet air volume is backwashed.

According to the filtration apparatus and the backwashing method using the multifiber layer according to the present invention, the filtration and backwashing are performed by separating and mounting the filter layer with a plurality of particle removing layers by forming a multifiber layer with the same pores of fibers (fiber yarns) having different thicknesses. Therefore, when filtering high concentration of raw water, the filtration efficiency is high, the long time filtration process is possible, and the backwashing time can be shortened and the waste of backwashing water can be reduced.

That is, according to the present invention, since a plurality of particle removal layers (filter layers) filter various contaminants (floating solids) of various sizes step by step, the filter layer has a low load, and thus the filtration efficiency is high, and the filter layer is not clogged so that the cleaning cycle of the filter layer is Longer Accordingly, the life of the filter layer is long, so that the replacement cycle of the filter is long, and the performance of the filtration device is not easily degraded. In addition, the backwashing time can be shortened during backwashing and the reduction of backwashing water can be increased.

1 is a configuration sectional view showing a filtration device using a multifiber layer according to an embodiment of the present invention.
Figure 2 is a state diagram when the filtration in the filtration device using a multi-fiber layer according to an embodiment of the present invention.
3 is an operational state diagram of backwashing in a filtration apparatus using a multifiber layer according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

On the other hand, the embodiment of the present invention will be described taking an example of a filtration device formed of three layers of multi-fiber filter layer. In the filtering device using the multifiber layer of the present invention, the filter layer may be formed of two or four or more multifiber layers.

1 is a configuration sectional view showing a filtration device using a multifiber layer according to an embodiment of the present invention. As illustrated, the filtration device 100 using the multifiber layer includes a main body 110, a filter layer 120, a fixed holder 130, a moving holder 140, an air tank tank 150, and a house. A water bottle 160 is provided.

The main body 110 is a cylindrical pressure vessel in which a raw water inlet 111a is formed at one side (upper side) and a treated water outlet 112a is formed at the other side (lower side). One side (upper side) of the main body 110 is fastened and blocked by a closing plate 111 on which the raw water inlet 111a is formed, and the other side (lower side) of the main body 110 forms a discharge water 112 forming the treated water outlet 112a. It is fastened and blocked by this air tank tank 150 which penetrates. The lower side of the body 110 is fastened by a separate body closing plate, it may be made of a structure in which the air tank tank 150 is coupled to the body closing plate.

The raw water inlet 111a and the treated water outlet 112a have a structure in which pipes are welded to form a pipe line. The treated water outlet 112a communicates with a sump to be described later. The body 110 is preferably formed of a plastic material such as acrylic, ABS, polypropylene (PP), polyethylene (PE), and may be formed of a corrosion resistant metal material such as stainless steel.

The filter layer 120 is made of a fiber (fiber yarn) having flexibility and durability that is inserted into the main body 110 and varies depending on the water pressure and air pressure at the time of filtration or backwashing. It is configured to be separated into a plurality of particle removal layer, one end (lower end) is fixedly connected to the fixed holder 130 and the other end (top) is fixedly connected to the moving holder 140, respectively.

The filter layer 120 is separately mounted with a plurality of particle removal layers, and a fiber layer is formed with a fiber thickness of 0.8 μm to 1.2 μm, and the micro particle removal layer 121 mounted at the innermost part and 4 μm to 6 μm A fiber layer is formed with a fiber yarn thickness to form an intermediate particle removal layer 122 interposed therebetween, and a fiber layer with a fiber yarn thickness of 8 μm to 12 μm is formed to the outermost particle removal layer 123. Is formed. The fine particle removal layer 121 is preferably formed of a fiber layer with a fiber thickness of 1.0㎛, the intermediate particle removal layer 122 is preferably formed of a fiber layer with a fiber thickness of 5㎛, macroparticles The removal layer 123 is preferably formed of a fiber layer having a fiber thickness of 10㎛.

The filter layer 120 is formed of a microparticle removal layer mounted on the inside of the filter layer to remove microparticles and a macroparticle removal layer mounted on the outside of the filter layer to remove macroparticles. It can also be achieved.

The fiber layer constituting the filter layer 120 in three layers (microparticle removal layer, intermediate particle removal layer, macroparticle removal layer) has a moving holder 140 due to the water pressure and water flow of the raw water flowing through the raw water inlet 111a. Due to the pressurization, the pore structure of the filter layer made of fiber yarn compressed by the fixing holder 130 is changed to a more dense structure, so that suspended solids and the like contained in the fluid can be filtered with high precision.

The fixed holder 130 is fixed to the treated water outlet 112 side of the main body 110 and fixedly connects one end (lower end) of the filter layer 120, and has a three-stage flange shape that increases in diameter from the inner side to the outer side. have. One end (lower end) of the fine particle removal layer 121 is fixedly connected to the first end outer circumferential surface by a band or the like, and one end (lower end) of the intermediate particle removal layer 122 is fixedly connected to the second end outer circumferential surface by a band or the like, One end (lower end) of the macroparticle removal layer 123 is fixedly connected to the third end outer circumferential surface by a band or the like. A water collecting container 160 is inserted into and fixed to an inner center (first end plane) of the fixing holder 130.

On the other hand, the fixed holder 130 is formed with a plurality of air inlet for introducing air in the filter layer 120, the plurality of air inlet and the first air inlet 131 for introducing air into the fine particle removal layer 121 and The air is introduced between the second air inlet 132 for introducing air between the fine particle removing layer 121 and the intermediate particle removing layer 122, and the intermediate particle removing layer 122 and the macro particle removing layer 123. It consists of a third air inlet 133 to be introduced. A plurality of first air inlet 131 is formed in the first end plane of the fixed holder 130 along the circumferential direction, and the second air inlet 132 has a circumferential direction on the second end plane of the fixed holder 130. Accordingly, a plurality of third air inlets 133 are formed along the circumferential direction of the third end plane of the fixed holder 130.

Fixing holder 130 is fixed to the air tank tank 150, it may be fixed to the air tank tank 150 via a separate body closing plate (not shown).

The moving holder 140 is fixedly connected to the other side of the filter layer 120 and moves in the main body 110 according to water pressure or air pressure, and has a four-stage flange shape in which a diameter increases from the inside to the outside. The other end (upper end) of the microparticle removal layer 121 is fixedly connected to the first end outer circumferential surface by a band, etc., and the other end (upper end) of the intermediate particle removal layer 122 is fixedly connected to the second end outer circumferential surface by a band or the like, The other end (upper end) of the large particle removal layer 123 is fixedly connected to the third end outer circumferential surface by a band or the like, and the fourth end outer circumferential surface is spaced apart from the inner surface of the main body 110 at regular intervals. The moving holder 140 includes a plurality of raw water inlets 141, 142, and 143 through which raw water flows into the filter layer 120.

Air tank tank 150 is fastened and fixed to the lower side (fixed holder side) of the main body 110, the air inlet 151 for uniformly supplying air into the filter layer 120 through the fixed holder 130 during backwashing The air injected through) is temporarily stored.

The inside of the air tank tank 150 is divided into two spaces by the separator 152 so that the air injected through the air inlet 151 rotates and flows into the filter layer 120 through the fixing holder 130 when the air is injected. It is separated and may be separated into two or more spaces. Air inlet 151 is formed on the lower outer peripheral surface of the air tank tank 150, the air inlet 151 is provided with a valve (not shown). The bottom surface (fastening surface) of the air tank tank 150 is formed with a plurality of holes in communication with the air inlet (131, 132, 133) of the fixed holder 130. In the center of the air tank tank 150, the discharge pipe 112 forming the treated water outlet 112a communicating with the collecting pipe 160 is installed through.

The sump 160 is inserted into and fixed to the inner center of the fixed holder 130 and is a tubular body in which a plurality of sump holes 161 are formed for collecting the filtered treated water and discharging it through the discharge pipe 112. The collecting hole 161 of the sump 160 also distributes the backwash water evenly in the filter layer 120 during backwashing.

In the filtering device using the multifiber layer according to the embodiment of the present invention configured as described above, raw water is injected into the inside of the main body 110 through the raw water inlet 111a in the direction of arrow A as shown in FIG. 2. As the moving holder 140 is uniformly pressurized (F direction), the moving holder 140 moves downward so that the fibers of the filter layer 120 are pressed and compressed so that the filter layer 120 forms a fine pore structure. Is filtered through the filter layer 120 through the raw water inlet (141, 142, 143), and the space between the moving holder 140 and the main body 110 of the moving holder 140, the filtered treated water The water is collected in the water collecting container 160 through the water collecting hole 161 and is discharged in the direction of the arrow B through the treated water outlet 112a. At this time, the valve (V) provided in the air inlet 151 is closed.

In the filtration process of the embodiment of the present invention, the suspended solids may include the macroparticle removal layer 123 mounted on the outermost part, the intermediate particle removal layer 122 mounted on the middle, and the fine particle removal layer 121 mounted on the innermost part. Filtering step by step depending on the particle size, high filtration efficiency of the high concentration filtration can be high to slow the blockage caused by the large particles to maintain the filtration state for a long time. Therefore, the backwash cycle of the filter layer 120 can be reduced, waste of backwash water can be reduced, and the life of the filter layer 120 can be increased.

After the filter device is operated for a certain period of time, the filter layer 120 is backwashed as shown in FIG. In the case of backwashing, the backwashing water is injected in the direction of arrow C through the treated water outlet 112a, while the valve V provided at the air inlet 151 is opened and air is supplied into the air tank 150 in the direction of the arrow D. Inject.

At this time, the backwash water injected through the treated water outlet 112a is dispersed through the collecting hole 161 of the sump 160 and is introduced into the filter layer 120, and the air tank 150 is provided through the air inlet 151. The air injected therein is guided by the separator 152 to turn from the lower space to the upper space to act as an air cushion, and the first, second and third air inlets of the fixed holder 130 with uniform pressure ( It is introduced into the filter layer 120 through 131, 132, 133.

Meanwhile, the air flowing into the filter layer 120 allows different amounts to flow through the first, second, and third air inlets 131, 132, and 133, and the inflow amount is controlled by the number of air inlets and a valve (not shown). do. In this case, 47-53% of air is introduced into the fine particle removing layer 121 through the first air inlet 131, and the fine particle removing layer 121 is provided through the second air inlet 132. ) And the intermediate particle removal layer 122 flows 28 to 32% of the total amount of inlet air, and the intermediate particle removal layer 122 and the macro particle removal layer 123 through the third air inlet 133. In between, 19-21% of the air is introduced.

As described above, when the amount of air flowing into the filter layer 120 through the first, second, and third air inlets 131, 132, and 133 is different, the fine particle removal layer 121 is changed into the macro particle removal layer 123. By reducing the amount of air. By effectively removing the suspended solids collected in each layer, the backwashing efficiency can be maximized and the backwashing time can be minimized, thereby reducing the waste of backwashing water. Usually backwashing is preferably carried out for 2-3 minutes.

The backwash water and air introduced into the filter layer 120 act on the filter layer 120 and the moving holder 140 to inflate the filter layer 120 while pushing up the moving holder 140 while collecting the air collected in the filter layer 120. The washing of the solids is made, and the washing water including the suspended solids is discharged to the outside through the raw water inlet 111a (arrow E direction).

Filtration device and backwashing method using the multi-fiber layer of the present invention is a high-grade treatment from pre-treatment facilities in each field, such as domestic water purifier, advanced treatment of sewage sewage effluent, groundwater purification, rainwater recycling system, agricultural water industrial water factory wastewater dewatering system It can be applied to various systems.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: filtration device 110: main body
111: finish plate 111a: raw water inlet
112 discharge pipe 112a treated water outlet
120 filter layer 121 fine particle removing layer
122: intermediate particle removing layer 123: macroparticle removing layer
130: fixed holder 131: first air inlet
132: second air inlet 133: third air inlet
140: moving holder 141, 142, 143: raw water inlet
150: air tank tank 151: air inlet
160: sump 161; Catchhole

Claims (5)

A main water inlet formed on one side and a treated water outlet formed on the other side;
A filter layer inserted into the main body and variable according to water pressure and air pressure during filtration or backwashing;
A fixed holder fixed to the treatment water outlet side of the main body and fixedly connecting one end of the filter layer;
A moving holder fixedly connecting the other end of the filter layer to move in the main body according to water pressure or air pressure;
An air tank tank for introducing air into the filter layer through the fixing holder during backwashing;
The filter layer is separated and mounted in a plurality of particle removal layer to form a multi-fiber layer with the same pore fiber yarn of different thickness,
The inside of the air tank tank is a filtration device using a multi-fiber layer, characterized in that separated by a plurality of spaces by a separator. The method according to claim 1,
The plurality of particle removing layers are formed of a microparticle removal layer mounted on the inside of the filter layer to remove microparticles and a macroparticle removal layer mounted on the outside of the filter layer to remove macroparticles. Filtration device using. The method according to claim 1,
The plurality of particle removal layers, the fiber layer is formed to the fiber thickness of 0.8㎛ ~ 1.2㎛ microparticle removal layer mounted on the innermost, and the fiber layer is formed with a fiber thickness of 4㎛ ~ 6㎛ middle Filtration device using a multi-fiber layer, characterized in that the fiber layer is formed to the intermediate particle removal layer and the fiber yarn thickness of 8㎛ ~ 12㎛ formed on the outermost mounted giant particle removal layer. The method according to claim 3,
The fixed holder is provided with a plurality of air inlet for introducing air into the filter layer,
The plurality of air inlets may include a first air inlet for introducing air into the fine particle removing layer, a second air inlet for introducing air between the fine particle removing layer and the intermediate particle removing layer, and the intermediate particle removing layer. And a third air inlet for introducing air between the macroparticle removal layer. The multi-fiber layer filter layer is composed of fibers of different thicknesses with the same voids, but the fine particle removal layer is formed on the innermost side of the filter layer with a fiber thickness of 0.8 μm to 1.2 μm, and the fiber yarns of 4 μm to 6 μm. A middle particle removing layer is formed in the middle of the filter layer with a thickness, and a large particle removing layer is formed at the outermost part of the filter layer with a fiber thickness of 8 μm to 12 μm, and the raw water is filtered through the filter layer.
Backwashing by injecting air and backwashing water into the filter layer, in the 47% to 53% of the total amount of inlet air flows into the fine particle removal layer, the inlet flows between the fine particle removal layer and the intermediate particle removal layer Multi-fiber layer, characterized in that 28-32% of the air flows into the entire air volume, and 19-21% of the air flows through the intermediate particle removing layer and the macroscopic particle removing layer and backwashed. Backwashing method of filtration device using.

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