KR100630372B1 - Filtering Device - Google Patents

Abstract

The present invention is a housing having a hollow cylindrical shell shape and formed with an inlet port 2 through which liquid is introduced, a discharge port 20 through which filtrate is discharged, and a backwash water discharge pipe 14 through which backwashed water is discharged. 28); A primary filter net installed inside the housing 28 in a hollow cylindrical shape to remove foreign particles of large particles contained in the liquid introduced into the inlet 2; A microfiltration network (8) connected to the lower end of the primary filtering network (4) to remove foreign matters of the fine particles contained in the liquid filtered by the primary filtering network (4); A rotating rod 12 provided on an inner central axis of the housing 28; A solid suction pipe 10 connected to the rotary rod 12 and installed at one end thereof to be close to the microfiltration network 8; A driving motor 32 connected to one end of the rotating rod 12 to rotate the rotating rod 12; A gas inlet pipe 22 connected to one side of the housing 28 so that a high pressure gas is introduced from the outside during backwashing; And a gas storage unit 26 connected to the gas inlet pipe 22 to supply a high pressure gas to the gas inlet pipe 22.

According to the present invention, by effectively supplying a high-pressure gas into the housing in order to easily remove the fine particles and adhesive substances during backwashing, the solids accumulated in the microfiltration network can be efficiently removed to minimize the backwashing time and backwash flow rate. There is.

Filtration device, filter, fine particles, filter network, high pressure gas

Description

Filtering Device

1 is a perspective view of a filtration device according to the present invention,

2 is a cross-sectional view of a filtration device according to the present invention;

3 is a block diagram including a filtration device according to the present invention.

<Description of Symbols for Main Parts of Drawing>

2: inlet 4: primary filter network

6: bulkhead 8: microfiltration

10: solid suction tube 12: rotary rod

14: backwash water discharge pipe 16: backwash water shutoff valve

18: drain water shutoff valve 20: outlet

22 gas inlet tube 24 gas shutoff valve

26 gas storage 28 housing

30: control unit 32: drive motor, hydroelectric motor

34: rotating rod support 36: pressure measuring means

38: backwash water outlet 40: bottom surface

42: space

The present invention relates to a filtration device for removing foreign matter contained in the liquid, and more particularly to remove the microparticles contained in the liquid using a microfiltration network, and precipitates in the fine filtering network according to the removal of the fine particles. It relates to a filtration device that can automatically backwash the fine particles to be.

To date, a filtration device that removes various kinds of foreign substances contained in fluids such as petrochemicals, chemicals, water and sewage treatment devices, and removes wastes or scales deposited or accumulated in the filtration device when the foreign substances are removed As such an example, filtration devices such as filtration, filters using fiber yarns, filters using polymer membranes, and the like have been used. However, in the case of most of the above-described filtration apparatus, as the use time increases, the filtered foreign matter accumulates in the filter, thereby decreasing the filtration rate and causing a pressure loss.

On the other hand, another filtering device for removing foreign matter contained in the fluid is a cylindrical housing in which the inlet pipe and the outlet pipe is installed, the cylindrical filter net is installed in the housing, the motor and the rotating shaft installed on the housing, the rotating shaft and The brush support shaft is connected, the brush head is installed on the brush support shaft is formed in a spiral spiral contact with the inner surface of the filter network, the foreign matter storage container is installed in the lower portion of the housing, the fluid is introduced into the inlet pipe into the housing After the foreign matter is filtered by the provided filter network is discharged to the outlet pipe.

When such a filtration device is used for a certain period of time, foreign matter accumulates on the inner surface of the filtering network to reduce the filtration efficiency, and the hole of the filtering network is clogged to prevent the fluid flow smoothly, thereby operating a motor for cleaning the filtering network. Brush is rotated by the operation of to remove the foreign matter accumulated in the filter net, the removed foreign matter is stored in a foreign matter storage container installed at the bottom of the housing is discharged to the outside of the housing by manual every time to remove.

However, in the above-described method, the foreign matter can be easily removed as the stiffness of the brush hair increases, but as the stiffness of the brush hair increases, the possibility of damaging the filter network increases.

In order to overcome this problem, a technology of fast filtration speed, low pressure loss, and automatic backwashing with filtration of a fluid has been developed. As an example, EP 0131348 has an automatic backwash filter. US Patent No. 4,692,247 discloses a tubular fluid filtration device, and Korean Patent Laid-Open No. 1999-014551 discloses an automatic filtration device for removing foreign matter accumulated in the filtration network with a suction bar and a rotating rod of a rotary method. Is disclosed.

However, the above-described filtration device is configured to remove solids accumulated in the microfiltration network or the microfilter by simply driving the difference between the pressure inside the filter and the atmospheric pressure, and when the solids are adsorbed to the micropores of the filter and the microfiltration network, If the flow rate is low, the backwash does not occur completely, the filtration rate is reduced, and there is a problem that the backwash amount is increased by performing filtration frequently.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and by providing a pressurized gas from the outside of the housing during the back washing to the fine filtration network, to provide a filtration device that is easily detached and removed from the micro filtration network. There is a problem.

In one aspect, the present invention provides a housing having a hollow cylindrical shell shape, each of which has an inlet through which liquid is introduced, an outlet through which filtrate is discharged, and a backwash water discharge pipe through which backwashed water is discharged; A primary filter network installed inside the housing in a hollow cylindrical shape to remove foreign matters in large particles contained in the liquid introduced into the inlet; A microfiltration network connected to the lower end of the primary filtering network to remove foreign matters of the fine particles contained in the liquid filtered by the primary filtering network; A rotating rod provided on an inner central axis of the housing; A solid suction pipe connected to the rotating rod and installed at one end thereof to be close to the microfiltration network; A driving motor connected to one end of the rotating rod to rotate the rotating rod; A gas inlet pipe connected to one side of the housing to allow high-pressure gas to flow in from the outside during backwashing; And a gas storage unit connected to the gas inlet pipe and supplying a high pressure gas to the gas inlet pipe.

In another aspect, the present invention is connected to the inlet and outlet of the filtering device pressure measuring means for measuring the pressure of the liquid passing through the inlet and outlet; A discharge water shutoff valve connected to the discharge port to open / close the discharge port; A backwash water shutoff valve connected to the backwash water discharge pipe to open and close the backwash water discharge pipe; A gas shutoff valve connected to the gas inlet pipe to open / close the gas inlet pipe; It is connected to the pressure measuring means, the discharge water shutoff valve, the backwash water shutoff valve and the gas shutoff valve to receive the pressure signal sent from the pressure measuring means and receive the discharge water shutoff valve, the backwash water shutoff valve and the gas shutoff It provides a filtration device further comprising a control unit for controlling the opening and closing of the valve.

Filtration device according to the present invention means a device for treating fine particles dispersed in the liquid generated in the fields of water and sewage treatment, petrochemical, chemicals, paper, food, metal processing, etc. Any filter device conventionally used in the art to achieve is included in the filter device.

The housing constituting the outer appearance of the filtration apparatus according to the present invention is formed in the form of a hollow cylindrical shell, the inlet through which the target liquid to be treated can be introduced into one side of the housing and the treated filtrate. The discharge outlet is formed, a backwash water discharge pipe for discharging the foreign matter accumulated in the filtration device and then discharge the washing liquid to the outside, and a gas inlet pipe for supplying a high pressure gas to the inside of the housing. .

At this time, the housing as a specific aspect, it can form a separate space in the lower portion of the bottom surface relative to the bottom surface of the housing, in this case, the backwash water discharge pipe is connected to one side of the outer wall surface of the separate space is installed do.

On the other hand, the primary filter network according to the present invention is composed of a cylindrical having a hollow, a plurality of holes through which the liquid can pass through the outer peripheral surface of the cylindrical to remove foreign substances contained in the liquid to be treated, in the art Any filter may be used as long as it is a commonly used filter network.

The microfiltration network according to the present invention is for removing the fine particles contained in the treated liquid passing through the primary filter network, the microparticles are provided with a plurality of holes smaller than the size of the microparticles to be removed in the filter network By passing the liquid containing the microfiltration network to remove the fine particles from the liquid, any of the microfiltration network that can achieve this purpose may be used.

The fine particles removed by the microfiltration network are accumulated in the microfiltration network to reduce the performance of the filtration device, and to perform the back washing to remove the accumulated microparticles in order to prevent such performance degradation.

On the other hand, the primary filter network and the micro filtration network is installed spaced apart from the inner wall surface of the housing at a predetermined distance, the outer peripheral surface of the boundary surface of the primary filter network and the micro filtration network is divided into a partition wall protruding from the housing flows into the inlet The treated liquid is not incorporated directly into the microfiltration network.

If necessary, the microfiltration network may be installed along the inner wall of the primary filter network, in which case a distance from the bottom surface with respect to the transverse longitudinal direction of the primary filter network cylindrically installed inside the hollow cylindrical shell form. It can be configured by connecting the microfiltration network along the inner wall surface of the primary filter network. In such a configuration, the interface between the primary filter network and the microfiltration network means a boundary area between the portion where only the primary filter network exists and the portion where the microfiltration network is formed along the inner wall surface of the primary filter network.

On the other hand, the rotating rod according to the present invention has a hollow is formed to provide a movement path of the backwashing water therein, at least one solid suction pipe is connected to one side of the outer peripheral surface of the rotating rod, the backwash water is rotated through the solid suction pipe Allow inflow.

At this time, the rotary bar is located in the inner center of the primary filtering network and the microfiltration bar, the rotary rod is installed on one end of the rotary rod is connected to the rotating rod support that is connected to the boundary between the primary filtering network and the microfiltration network, The other end opposite to the part connected to the rotating rod support is fixed by being connected to the bottom of the housing.

Here, when a separate space is formed in the lower portion of the bottom surface relative to the bottom surface of the housing, the other end of the rotary rod is opposite to the one side connected to the rotating rod support is provided at the bottom of the bottom surface of the housing It is connected and fixed to the bottom of the space.

The drive motor according to the present invention is connected to the rotary rod is provided to provide a driving force for rotating the rotary rod, if any of these objects can be achieved, for example, a motor driven by electrical energy, hydraulically driven Although a motor or the like may be used, it is preferable to use a motor commonly used in the art, and more preferably to use a hydraulic motor that drives the rotating rod using hydraulic power. .

In a particular aspect, the hydromotor is located in a space formed separately from the bottom of the bottom surface relative to the bottom surface of the housing, the rotating rod so as to penetrate perpendicularly to the longitudinal direction of the rotating rod extended to the separately formed space It is connected to, the overall shape is a cylindrical pipe shape having a hollow with both ends closed, the backwash water outlets are formed so as to face each other based on the cross section of the cylindrical pipe at both ends of the cylindrical pipe having the hollow.

Here, the aforementioned hydraulic motor is to rotate the rotating rod using a hydraulic force, when the backwash water flows into the solid suction pipe connected to one side of the rotating rod and then flows into the hydraulic motor along the hollow of the rotating rod, the cylindrical tube The backwash water is discharged through the backwash water outlets formed at both ends of the hydroelectric motor having the shape of to rotate the rotating rod according to the principle of reaction action of the force.

The gas inlet pipe according to the present invention is to remove solids accumulated in the microfiltration network by supplying a high-pressure gas into the filtering apparatus when backwashing foreign substances accumulated in the microfiltration network of the filtration apparatus. It is connected to one side of the housing, preferably one side close to the microfiltration network is supplied into the housing at a pressure of 1 to 10 atm.

At this time, the gas inlet pipe is connected to the gas storage unit that can provide a high-pressure gas, a gas shutoff valve that can block the flow of the high-pressure gas of the gas storage unit if necessary between the gas inlet pipe and the gas storage unit Can be installed in connection.

Gas storage unit according to the present invention may be any device that can store a high pressure gas or a device that can provide a high pressure gas, preferably using a compressor for producing high pressure compressed air. good.

The pressure measuring means according to the present invention is installed to be connected to the inlet and the treated liquid, that is, the treated liquid, that is, the discharge outlet through which the treated liquid flows, and to measure the pressure of the liquid flowing through the inlet and the outlet. Any pressure may be used as long as the pressure can be measured. However, it is preferable to use a pressure signal that can be sent to a control unit connected to the pressure measuring means by processing the measured pressure value.

On the other hand, the control unit receives the pressure signal sent from the pressure measuring means and when the pressure signal exceeds the set value, by using a backwash water shutoff valve, a discharge water shutoff valve and a gas shutoff valve connected to the control unit Open and close backwash, discharge and gas flow paths.

Here, the set value means an allowable value of the pressure difference between the liquid flowing through the inlet and the outlet, and as the pressure difference increases, the filtration performance of the microfiltration network decreases.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the following description is only for describing the present invention in detail and does not limit the scope of the present invention by the following description.

1 is a perspective view of a filtration device according to the present invention, Figure 2 is a cross-sectional view of the filtration device according to the present invention, Figure 3 will be described together as a configuration diagram including a filtration device according to the present invention.

As shown in Figures 1 to 3, the filtration device according to the invention comprises a housing 28 having a hollow cylindrical shell form; An inlet port 2 connected to one side of the housing 28 to introduce a liquid; A primary filter net installed inside the housing 28 in a hollow cylindrical shape to remove foreign particles of large particles contained in the liquid introduced into the inlet 2; A microfiltration network (8) connected to the lower end of the primary filtering network (4) to remove foreign matters of the fine particles contained in the liquid filtered by the primary filtering network (4); A discharge port 20 connected to one side of the housing 28 to discharge the filtered liquid from the microfiltration network 8; A rotating rod 12 formed on an inner central axis of the housing 28; A solid suction pipe 10 connected to the rotating rod 12 and installed at one end thereof so as to be close to the microfiltration network 8, into which washing water is introduced; A driving motor 32 connected to one end of the rotating rod 12 to rotate the rotating rod 12; A backwash water discharge pipe 14 connected to one side of the housing 28 to discharge the backwashed washing water; A gas inlet pipe 22 connected to one side of the housing 28 so that a high pressure gas is introduced from the outside during backwashing; And a gas storage unit 26 connected to the gas inlet pipe 22 to supply a high pressure gas to the gas inlet pipe 22.

On the other hand, the filtration device according to the invention is connected to the inlet (2) and outlet 20 as necessary, pressure measuring means 36 for measuring the pressure of the liquid passing through the inlet (2) and outlet (20) , The backwash water to be connected to the outlet 20 to open and close the outlet water shutoff valve 18 to open and close the outlet 20, and to the backwash water discharge pipe 14 to open and close the backwash water discharge pipe 14. A gas shutoff valve 24 connected to the shutoff valve 16 and a gas inlet pipe 22 to open and close the gas inlet pipe 22, the pressure measuring means 36, a discharge water shutoff valve 18, and a reverse It is connected to the wash water shutoff valve 16 and the gas shutoff valve 24 to receive the pressure signal sent from the pressure measuring means 36, the discharge water shutoff valve 18, the backwash water shutoff valve ( 16) and the control unit 30 for controlling the opening and closing of the gas shut-off valve 24 may be further included.

The primary filter net 4 is to remove foreign matter having a relatively large particle size contained in the liquid to be treated, and is formed from the inner wall surface of the housing 28 in the housing 28 having a hollow cylindrical shell shape. It is formed in a cylindrical shape having a hollow spaced apart from a certain distance, the outer peripheral surface of the cylindrical is provided with a number of holes through which the liquid can pass to remove the foreign matter having a particle size larger than the diameter of the hole.

The microfiltration network 8 according to the present invention is connected to the lower end of the primary filtering network 4 so as to be spaced apart from the inner wall surface of the housing 28 by a predetermined distance, and the hole having a size smaller than the size of the microparticles to be removed is It is provided on the outer circumferential surface to remove the fine particles contained in the liquid to be treated.

On the other hand, the housing 28 according to the present invention forms a partition 6 protruding from the inner wall surface of the housing 28 along the outer circumferential surface of the interface between the primary filter net 4 and the microfiltration net 8 is the primary The separation between the filtering net 4 and the microfiltration net 8 prevents the liquid to be introduced into the inlet 2 from being directly incorporated into the microfiltration net 8 without filtration of the primary filtering net 4. .

In addition, a radially extending rotary rod support 34 is connected to an inner side of the boundary between the primary filter net 4 and the microfiltration net 8, and the rotary rod support 34 is located at the center of the rotary rod support 34. Rotating rod 12 is installed vertically with respect to).

At this time, the other end opposite to the one end of the rotary rod 12 connected to the rotary rod support 34 is formed separately in the bottom 42 of the bottom surface 40 of the housing 28, the isolated space 42 It is connected to the bottom of the installation and is supported.

The rotating rod 12 having such a configuration is formed in the hollow so as to provide a movement path of the backwashing water therein, at least one solid suction pipe 10 is connected to one side of the outer peripheral surface, the solid One side of the suction pipe 10 is installed to be close to the microfiltration network 8 so that the washing water including the solid accumulated in the microfiltration network 8 may be introduced during backwashing.

The drive motor 32 according to the present invention is connected to the rotary rod to provide a driving force for rotating the rotary rod, in Figures 1 and 2 specifically shown as a hydraulic motor 32 as a driving motor, The hydroelectric motor 32 is positioned in a space 42 formed to be separately isolated from the bottom of the bottom surface 40 with respect to the bottom surface 40 of the housing 28, and the space 42 formed separately. It is connected to the rotating rod 12 in the shape of a cylindrical tube having a hollow with both ends closed so as to penetrate perpendicularly to the longitudinal direction of the rotating rod 12 extended to, and both ends of the cylindrical tube having the hollow The backwash water outlets 38 are formed to face each other based on the cross section.

Here, the hydroelectric motor 32 is for rotating the rotary rod 12 using a hydraulic force, the backwash water flows into the solid suction pipe 10 installed on one side of the rotary rod 12 and then the rotary rod ( 12 is introduced into the hydraulic motor 32 along the hollow, the backwash water is discharged through the backwash water outlet 38 formed at both ends of the hydroelectric motor 32 having the shape of the cylindrical tube to rotate the rod 12 Will rotate.

The gas inlet pipe 22 according to the present invention, when backwashing the foreign matter accumulated in the microfiltration network 8 of the filtration device, supplies a high-pressure gas into the filtration device to form one side of the housing 28 constituting the filtration device. Preferably, it is connected to one side close to the microfiltration network (8).

In particular, the desorption of the solids of the microfiltration network 8 using the high pressure gas can be efficiently removed in a shorter time than the removal of the solids from the microfiltration network 8 using only backwashing water. Moreover, when the solid accumulated in the microfiltration network 8 is a sticky material, it is difficult to remove it only by backwashing.

On the other hand, the gas inlet pipe 22 is connected to the gas storage unit 26 that can provide a high-pressure gas, the gas block to control the flow of the high-pressure gas of the gas storage unit 26 as needed The valve 24 may be connected between the gas inlet pipe 22 and the gas reservoir 26.

The pressure measuring means 36 according to the present invention is connected to the inlet port 2 through which the liquid to be treated flows in and the outlet port 20 through which the treated liquid is discharged, and passes through the inlet port 2 and the outlet port 20. It is for measuring the pressure of the flowing liquid, and any thing can be used as long as it can measure the pressure of the flowing liquid.

Here, the pressure measuring means 36 provided in the outlet 20 may be separately installed, but when the discharge water shutoff valve 18 is capable of measuring pressure as well as opening and closing the discharge water, the discharge water shutoff valve 18 is The pressure measuring means 36 may be substituted.

On the other hand, the control unit 30 receives the pressure signal sent from the pressure measuring means 36 and if the pressure signal exceeds the set value, the backwash water shutoff valve 14 is connected to the control unit 30 By using the discharge water shutoff valve 18 and the gas shutoff valve 24, the backwash water and the movement paths of the discharged water and the gas are opened and closed.

At this time, the backwash water shutoff valve 14, the discharge water shutoff valve 18 and the gas shutoff valve 24 is any device commonly used in the art to open and close the movement path of the fluid passing through the inside of the You can also use the device.

Referring to the operation of the filtration device according to the present invention having the above-described configuration is as follows.

First, the target liquid is introduced into the inlet port 2 formed on one side of the housing 28 of the filtering device.

Then, the liquid introduced into the inlet (2) passes through the primary filter network (4) installed adjacent to the inlet (2) and removes the relatively large foreign matter contained in the liquid to be treated.

In this case, since the hollow cylindrical body, such as the housing of the primary filter network 4, the liquid to be processed located on the outside of the primary filter network 4 is introduced into the interior through the primary filter network (4). .

Then, the treated liquid passed through the primary filter network 4 passes through a hollow cylindrical microfiltration network 8 connected to the primary filter network 4 and small particles having a small particle size are removed. The treatment liquid from which the fine particles are removed is discharged to the outside through the discharge port 20 formed at one side of the housing 28.

At this time, as the processing liquid located in the hollow cylinder passes through the microfiltration network 8 to the outside of the cylindrical microfiltration network 8, foreign matters of the fine particles accumulate inside the cylindrical microfiltration network 8. As a result, the solids accumulate, and the pressure difference increases between the inlet port 2 through which the liquid to be treated flows in and the outlet port 20 through which the filtrate is discharged.

Accordingly, when the pressure difference is increased to a predetermined pressure or more, the solids accumulated in the microfiltration network 8 are closed by closing the outlet 20 through which the filtrate is discharged and opening the backwash water discharge pipe 14. Together with the solid suction pipe 10 to be introduced.

Next, the washing water including the solid introduced into the solid suction pipe 10 is introduced into the hydroelectric motor 32 through the hollow in the rotary rod 12 and then discharged into the backwash water discharge pipe 14.

Here, the backwash water introduced into the hydroelectric motor 32 is discharged to the backwash water outlet 38 provided at both ends of the hydroelectric motor 32, respectively, and is discharged to the backwash water outlet 38. The rotating rod 12 connected to the hydroelectric motor 32 is rotated by the hydraulic energy of the face wash.

At this time, a general drive motor that can directly rotate the rotary rod 12 can be used instead of the hydraulic motor 32, in this case, the washing water introduced into the rotary rod 12 needs to be introduced into the hydroelectric motor 32. Rotating rod 12 may be installed directly connected to the backwash water discharge pipe 14 without discharging the washing water to the outside.

Meanwhile, the solid suction pipe 10 connected to one side of the rotary rod 12 rotates together with the rotation of the rotary rod 12, and the solid accumulated in the microfiltration network 8 is introduced into the solid suction tube 10 together with the washing water. Remove it.

At this time, the flow rate of the washing water flowing into the solid suction pipe 10 is increased by keeping the gap between the solid suction pipe 10 and the microfiltration network 8 sufficiently small, thereby causing turbulence, and thus the solid suction pipe 10. The pressure in the periphery decreases and the solids accumulated in the microfiltration network 8 are easily removed.

 On the other hand, the high-pressure gas stored in the gas storage unit 26 is supplied to the gas inlet pipe 22 connected to one side of the housing 28 together with the above backwashing so that the high-pressure gas is outside the microfiltration network 8. By allowing the inflow from the inside to easily detach the solids accumulated in the microfiltration network (8).

Here, the desorption of the solid using the high pressure gas is made very quickly, so that the solid can be desorbed more efficiently than the method of desorbing the solid from the microfiltration network 8 using only backwashing water. In particular, when the solid accumulated in the microfiltration net 8 is a sticky material, it is difficult to remove it only by backwashing.

Subsequently, when the pressure difference between the inlet port 2 through which the liquid to be treated flows in and the outlet port 20 through which the filtrate is discharged are reduced through the backwashing process, the controller 30 opens the outlet port 20, and The washing liquid discharge pipe and the gas inlet pipe are closed to filter the liquid to be introduced into the inlet port 2.

On the other hand, the backwashing process of the above-described filtration device can be automatically performed by installing a means for measuring the pressure in the inlet (2) and the outlet (20) and the control unit 30 to control the bar, The pressure measuring means 36 capable of measuring the pressure of the liquid is connected to one side of the inlet port 2 through which the liquid to be treated flows in and the outlet port 20 through which the treated filtrate is discharged. When the pressure signal received from the outlet 20 is received by the controller 30 and the pressure difference is increased to a value higher than or equal to a set value, the outlet 20 is opened using the outlet water shutoff valve 18 connected to the upper controller 30. It is closed and the backwash water shutoff valve 16 connected to the backwash water discharge pipe 14 is opened so that the backwash water flows into the backwash water discharge pipe 14 and backwashes.

At this time, the gas shutoff valve 24 connected to the control unit 30 is opened by the control unit 30, whereby high-pressure gas is mixed into the housing 28 through the gas inlet pipe 22.

Then, the mixed high pressure gas is supplied to the microfiltration network 8 to desorb the accumulated solids in the microfiltration network 8 together with the backwash water.

Then, as the solids of the microfiltration network 8 are separated, the pressure difference between the inlet 2 and the outlet 4 is reduced, and the reduced pressure difference is connected to the inlet 2 and the outlet 4. The controller 30 recognizes the pressure difference means 36, and when the recognized pressure difference value is maintained below the set pressure difference value, the controller 36 controls the backwash water shutoff valve 16 and the gas shutoff valve 24. ), The backwash water discharge pipe 14 and the gas inlet pipe 22 are closed, and the liquid to be treated is filtered by opening the discharge port 20 using the discharge water shutoff valve 18.

The above filtration apparatus may be installed in a horizontal or vertical form in the fluid pipe of the purification equipment, and may be installed in parallel.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the exemplary embodiments described above are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention should be construed that all changes or modifications derived from the meaning and scope of the appended claims and their equivalents, rather than the detailed description, are included in the scope of the present invention.

The filtration apparatus of the present invention can efficiently remove solids accumulated in the microfiltration network by supplying a high-pressure gas into the housing to easily remove the fine particles and sticky material during backwashing, thereby minimizing backwashing time and backwash flow. It works.

Claims (3)

A housing having a hollow cylindrical shell shape and formed with an inlet through which liquid is introduced, an outlet through which the filtrate is discharged, and a backwash water discharge pipe through which the backwashed water is discharged; A primary filter network installed inside the housing in a hollow cylindrical shape to remove foreign matters in large particles contained in the liquid introduced into the inlet; A microfiltration network connected to the lower end of the primary filtering network to remove foreign matters of the fine particles contained in the liquid filtered by the primary filtering network; A rotating rod provided on an inner central axis of the housing; A solid suction pipe connected to the rotating rod and installed at one end thereof to be close to the microfiltration network; A driving motor connected to one end of the rotating rod to rotate the rotating rod; A gas inlet pipe connected to one side of the housing to allow high-pressure gas to flow in from the outside during backwashing; And a gas storage unit connected to the gas inlet pipe and supplying a high pressure gas to the gas inlet pipe. The method of claim 1, Pressure measuring means connected to the inlet and the outlet to measure the pressure of the liquid passing through the inlet and the outlet; A discharge water shutoff valve connected to the discharge port to open / close the discharge port; A backwash water shutoff valve connected to the backwash water discharge pipe to open and close the backwash water discharge pipe; A gas shutoff valve connected to the gas inlet pipe to open / close the gas inlet pipe; It is connected to the pressure measuring means, the discharge water shutoff valve, the backwash water shutoff valve and the gas shutoff valve and receives the pressure signal sent from the pressure measuring means and receives the discharge water shutoff valve, the backwash water shutoff valve and the gas based on the pressure signal. Filtration device further comprising a control unit for controlling the opening and closing of the shut-off valve. Filtration method using a filtration device according to claim 1.

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