KR20220136614A - Filter apparatus with back flushing function - Google Patents

Abstract

The present invention relates to a backwash filter device, comprising: a housing having an inlet and an outlet; a filter element disposed inside the housing and formed in a hollow cylindrical shape to filter the fluid introduced through the inlet; a backwash scanner having one end rotatably installed in the center of the housing and the other end disposed adjacent to the inner surface of the filter element to rotate and suck backwash water; and an ultrasonic wave generator disposed adjacent to the outer surface of the filter element to correspond to the position of one end of the backwash scanner.

Description

Backwash filter device {FILTER APPARATUS WITH BACK FLUSHING FUNCTION }

The present invention relates to a backwash filter device, and more particularly, to a backwash filter device capable of doing so.

In general, facilities such as a ship's ballast water treatment device, a sewage/wastewater treatment device, and an onshore/offshore plant are provided with a filter device for reducing and discharging the concentration of pollutants in accordance with emission standards.

As an example of use of such a filter device, it may be applied to filter the treated water including the removed ship attachments after removing the ship attachments in order to prevent biofouling.

In the filtration process of the filter device, foreign substances larger than the pores are caught and accumulated in the filter element, and a backwashing process is performed to prevent clogging of the pores of the filter element.

In the conventional backwashing process, foreign substances trapped in the filter element were removed while rotating the scanner.

However, since the types and sizes of the foreign substances caught in the filter element are various and the degree of pinching is different, some foreign substances are separated from the filter element by the suction pressure of the scanner, but there is a problem that some foreign substances that remain are not removed from the filter element. there was.

Korean Patent Registration No. 10-1461719

The present invention has been devised to solve the above problems, and in particular, it is an object of the present invention to provide a backwash filter device capable of maximizing the removal efficiency of foreign substances caught in a filter element.

A backwash filter device according to an embodiment of the present invention devised to achieve the above object includes: a housing having an inlet and an outlet; a filter element disposed inside the housing and formed in a hollow cylindrical shape to filter the fluid introduced through the inlet; a backwash scanner having one end rotatably installed in the center of the housing and the other end disposed adjacent to the inner surface of the filter element, rotating and having a suction unit for sucking backwash water; and an ultrasonic wave generator disposed adjacent to the outer surface of the filter element to correspond to the position of one end of the backwash scanner.

A backwash filter device according to an embodiment of the present invention includes a position measuring unit that acquires position information of one end of a backwash scanner, a driving unit that moves the position of an ultrasonic generator, and a driving unit that receives position information of one end of the backwashing scanner It may further include a control unit for controlling the.

In addition, the backwash filter device according to an embodiment of the present invention may further include a separation distance measuring unit for measuring the separation distance between the ultrasonic generator and the filter element.

In addition, the backwash filter device according to an embodiment of the present invention further includes a water quality monitoring unit for monitoring water quality, wherein the control unit selects at least one of the water quality information obtained from the water quality monitoring unit, the amount of foreign substances, and the type of foreign substances. Based on the basis, the distance between the ultrasonic generator and the filter element may be adjusted by controlling the driving unit.

In an embodiment of the present invention, the ultrasonic generator may be tapered by decreasing a cross-sectional area in a direction toward the filter element.

As another embodiment, the ultrasonic generator of the present invention may be provided with a plurality of through passages.

Also, a plurality of ultrasonic generators according to an embodiment of the present invention may be provided, and only one ultrasonic generator closest to one end of the backwash scanner may operate.

A backwash filter device according to an embodiment of the present invention includes a backwash pipe for discharging sucked backwash water, a backwash flow rate control valve is installed in the backwash pipe, and a treated water discharge flow rate control valve is provided at the discharge part of the housing. Installed and backwashing performed by the backwash scanner, the backwash flow rate is maintained in the range of 0.1% to 2% of the flow rate of the backwash water introduced through the inlet by adjusting the opening degree of the backwash flow rate control valve and the treated water discharge flow rate control valve It may be configured to operate separately in a first backwashing mode in which the backwashing is performed and in a second backwashing mode in which the backwashing flow rate is maintained in a range of 1% to 10% of the backwashing water flow rate introduced through the inlet.

Here, the conversion from the first backwashing mode to the second backwashing mode may be performed based on a difference between the inlet pressure of the inlet and the outlet pressure of the outlet.

The suction unit of the backwash scanner according to an embodiment of the present invention may further include a collection guide.

According to the present invention, a scanner and an ultrasonic generator are provided together to separate foreign substances from the filter element by vibration generated by ultrasonic waves, and at the same time, there is an effect of improving the foreign substance removal efficiency by releasing the foreign substances by the suction pressure of the scanner.

In addition, according to the present invention, since the ultrasonic generator and the scanner are located in different spaces around the filter element, the suction action of the scanner or the transmission of vibration generated by the ultrasonic generator can be smoothly performed without interfering with each other. there is

In addition, according to the present invention, there is an effect of more effectively separating foreign substances by generating microbubbles by forming a through passage in the ultrasonic generator and spraying pressurized water.

1 is a side view of a backwash filter device according to an embodiment of the present invention;
It is a cross-sectional view taken in the direction A-A' of FIG.
3 is a block diagram of a backwash filter device according to an embodiment of the present invention;
4 is a view showing an embodiment of the ultrasonic generator provided in the backwash filter device according to the present invention,
5 is a view showing another embodiment of the ultrasonic generator provided in the backwash filter device according to the present invention,
6 is an embodiment of the suction part of the backwash scanner provided in the backwash filter device according to the present invention.

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numbers regardless of reference numerals, and redundant description thereof will be omitted. The suffixes “unit” and “group”, “module” and “unit”, “unit” and “unit”, “device” and “system” for components used in the following description are considered only for ease of writing the specification. It is given or used interchangeably, and does not have a distinct meaning or role by itself.

In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

1 is a side view of a backwash filter device according to an embodiment of the present invention, a cross-sectional view taken in the direction A-A' of FIG. 1 in FIG. 2, and FIG. 3 is a backwash filter device according to an embodiment of the present invention. It is a configuration diagram.

1 to 3 , a backwash filter device 100 according to an embodiment of the present invention includes a housing 101 , a filter element 110 disposed inside the housing 101 , and a housing 101 . It includes a backwash scanner 120 rotatably installed in the center of the , and an ultrasonic wave generator 130 disposed outside the filter element 110 .

The housing 101 has an inlet 101a on one side and an outlet 101b on the other side so that the fluid flows in and filters foreign substances of a predetermined size or less contained in the fluid, and a filter element therein. 110 , the backwashing scanner 120 , and the ultrasonic generator 130 may be provided in a substantially cylindrical shape in which an accommodating space is formed.

The filter element 110 is provided inside the housing 101 to filter the fluid. According to the illustrated embodiment, the filter element 110 is formed in a hollow cylindrical shape to be seated inside the cylindrical housing 101, the fluid introduced through the inlet 101a of the housing 101 is the filter element After moving to the inner hollow portion of 110 , the fluid is filtered by passing through the filter element 110 and discharged through the discharge portion 101b of the housing 101 .

Here, the filter element 110 may be formed in the form of a wedge-shaped wire or mesh, and the material is excellent in durability and corrosion resistance and is made of a steel or plastic material that is easy to process. can

In the filter element 110 according to an embodiment of the present invention, filtered foreign substances are accumulated on the inner surface, and backwashing is performed to separate and remove foreign substances accumulated inside the filter element 110 to prevent clogging by foreign substances. should be performed.

In the present invention, the backwashing scanner 120 is rotatably installed in the housing 101 for this backwashing operation and has one end disposed adjacent to the inner surface of the filter element 110 .

The backwash scanner 120 has one end disposed adjacent to the inner surface of the filter element 110 , and the other end connected to receive rotational force from the motor 125 , and is rotatably installed in the center of the housing. By being configured in this way, when the motor 125 is driven, the suction unit 121 of the backwash scanner 120 disposed adjacent to the inner surface of the filter element 110 rotates on the inner surface of the cylindrical filter element 110 . The accumulated foreign matter is inhaled. The backwash scanner 120 is configured to not only suck while rotating, but also to ascend and descend in the vertical direction, so that the entire inner surface of the cylindrical filter element 110 can be sucked evenly.

Here, although only one suction unit 121 of the backwash scanner 120 according to an embodiment of the present invention is illustrated, the present invention is not limited thereto, and a plurality of suction units 121 may be provided. In this way, when the plurality of suction units 121 are provided, the structure becomes complicated, but backwashing water can be sucked through the plurality of suction units 121 , thereby shortening the backwashing process.

In one embodiment of the present invention, the filter element ( An ultrasonic wave generator 130 disposed adjacent to the outer surface of the 110 is disposed.

That is, when the backwashing scanner 120 performs a backwashing process of sucking backwashing water for a predetermined area of the filter element 110 (near the inner surface of the filter element 110 ), a corresponding position of the corresponding area (filter The ultrasonic wave generator 130 disposed on the outer surface of the element 110 is operated to apply vibration to the filter element 110 to separate foreign substances accumulated and trapped in the filter element 110 to perform a more effective backwashing process. be able to do

As described above, in the present invention, the ultrasonic generator 130 and the backwash scanner 120 are positioned in different spaces with the filter element 110 as the center, so that the suction pressure of the backwash scanner 120 or the ultrasonic generator 130 is ), the vibration transmission can be performed smoothly without interfering with each other.

The backwash filter apparatus 100 according to an embodiment of the present invention includes a driving unit 140 for moving the position of the ultrasonic wave generating unit 130 .

As an embodiment, the driving unit 140 is configured to move with respect to the entire outer surface of the filter element 110 by rotating and/or elevating the ultrasonic generator 130 .

In addition, the backwash filter device 100 according to an embodiment of the present invention includes a position measurement unit 160 that acquires position information of one end of the backwash scanner 120 , that is, the suction unit 121 , and the backwash scanner. The control unit 150 may include a control unit 150 for receiving the position information of the suction unit 121 of 120 and controlling the driving unit 140 .

As described above, by including the driving unit 140, the position measuring unit 160, and the control unit 150, the backwash scanner 120 is located in the vicinity of the inner and outer surfaces of the filter element 110 based on the filter element 110, respectively. It is possible to position the suction unit 121 and the ultrasonic wave generating unit 130 corresponding to each other.

Additionally, in the backwash filter apparatus 100 according to an embodiment of the present invention, as shown in FIG. 3 , a separation distance measurement unit for measuring the separation distance between the ultrasonic generator 130 and the filter element 110 . It may further include 170 and a water quality monitoring unit 180 for monitoring water quality.

Here, the control unit 150, the driving unit 140 for moving the ultrasonic generator 130 to a predetermined position based on at least one of the water quality information obtained from the water quality monitoring unit 180, the amount of foreign substances, and the type of foreign substances. can be configured to control.

By being configured in this way, the backwashing filter device 100 according to an embodiment of the present invention determines the separation distance between the ultrasonic generator 130 and the filter element 110 for water quality or foreign substances (eg, ship attachments, marine objects). It is possible to appropriately adjust according to the type, amount, size of the foreign material, etc. to be accumulated in the filter element 110 .

Although only one ultrasonic wave generator 130 according to an embodiment of the present invention is shown in the drawings, the present invention is not limited thereto, and a plurality (eg, four are arranged in front, rear, left and right) at regular intervals may be provided.

In this case, the plurality of ultrasonic generators 130 may all operate simultaneously during the backwashing process, but only one end of the backwashing scanner 120 , that is, the one ultrasonic generator 130 closest to the suction part 121 , operates. can be configured to As a result, the movement of the ultrasonic generator 130 is minimized, and the ultrasonic generator 130 can be operated in synchronization with the movement of the suction part 121 of the backwash scanner 120 quickly.

Meanwhile, the backwash scanner 120 according to an embodiment of the present invention may be configured to operate in a plurality of backwash modes.

To this end, the backwash scanner 120 according to an embodiment of the present invention includes a backwash pipe 122 for discharging the sucked backwash water, and a backwash flow rate control valve 123 is installed in the backwash pipe 122. . In addition, the inlet pressure gauge 104 is installed in the inlet portion 101a of the housing 101 , and the treated water discharge flow rate control valve 103 and the outlet pressure gauge 105 are installed in the outlet portion 101b of the housing 101 . do.

The backwash filter device 100 according to an embodiment of the present invention configured as described above includes a backwash flow rate control valve 123 that adjusts the flow rate of backwash water sucked from the suction unit 121 of the backwash scanner 120 . ) and the opening degree of the treated water discharge flow rate control valve 103 that controls the discharge flow rate of the filtered treated water discharged from the discharge unit 101b, so that a plurality of backwash modes having different backwash flow rates and different backwash pressures can be implemented. do.

For example, the first backwash mode in which the backwash flow rate sucked into the suction unit 121 of the backwash scanner 120 is maintained in the range of 0.1% to 2% of the backwash water flow rate introduced through the inlet unit 101a; The backwash flow rate control valve 123 and the treated water discharge flow rate control valve 103 operate separately in the second backwash mode in which the flow rate is maintained in the range of 1% to 10% of the flow rate of the backwash water introduced through the inlet 101a. The degree of opening can be adjusted.

The first backwash mode is a mode in which backwashing is performed with a relatively small backwash flow rate and a relatively low backwash pressure by partially opening the backwash flow rate control valve 123 and fully opening the treated water discharge flow rate control valve 103. The washing scanner 120 may be continuously rotated or discontinuously (intermittently) rotated to perform backwashing. Compared to the second backwashing mode, it takes a relatively long time (for example, about 10 minutes) and may occupy most of the time of the backwashing process.

In this first backwashing mode, it is possible to prevent or delay the deterioration of the filtration performance of the filter element 110 by continuously or discontinuously sucking foreign substances (filtration residues) accumulated on the inner surface of the filter element 110 . .

The continuous operation or the discontinuous operation (intermittent operation) in the first backwash mode may be determined based on a difference between the pressure measured by the inlet pressure gauge 104 and the pressure measured by the discharge pressure gauge 105 , that is, the differential pressure.

For example, when the fluctuation slope of the differential pressure is low, the intermittent operation is performed because the filtering is smoothly performed, and when the fluctuation slope of the differential pressure is high, the amount of foreign substances accumulated in the filter element 110 is increased. Continuous operation may be performed in the first backwashing mode.

The second backwashing mode may be performed when the difference between the pressure measured by the inlet pressure gauge 104 and the pressure measured by the outlet pressure gauge 105 becomes higher than a predetermined threshold value. In this case, it is determined that the filtration ability of the filter element 110 is significantly reduced due to the accumulation of foreign substances, and the backwash operation is performed with the backwash flow rate and the backwash pressure higher than those in the first backwash mode, so that foreign substances can be sucked in in a short time.

In this second backwash mode, the backwash flow rate control valve 123 is fully opened and the treated water discharge flow rate control valve 103 is partially opened to increase the backwash flow rate and backwash pressure. For example, measured by the inlet pressure gauge 104 . The backwash flow rate is controlled by maintaining the backwash pressure by maintaining the inlet pressure in the range of 0.5 to 3 bar, and at the same time adjusting the opening time (for example, in the range of about 10 to 120 seconds) of the treated water discharge flow rate control valve 103 . The second backwashing mode may be performed in a relatively shorter time than the first backwashing mode.

Here, the conversion from the first backwashing mode to the second backwashing mode may be performed based on the difference between the inlet pressure of the inlet 101a and the outlet pressure of the outlet 101b as described above. Accordingly, the second backwashing mode may be independently performed without performing the first backwashing mode.

Meanwhile, in the backwash filter device 100 according to an embodiment of the present invention, a pressurized water injection pipe 135 may be provided to supply pressurized water to the ultrasonic generator 130 . The pressurized water injected from the pressurized water injection pipe 135 is sprayed in the direction of the filter element 110 from the ultrasonic generator 130 to further improve the backwashing action, which will be described in more detail later.

4 shows an embodiment of the ultrasonic wave generator provided in the backwash filter device according to the present invention, and FIG. 5 shows another embodiment of the ultrasonic wave generator provided in the backwash filter device according to the present invention.

4 and 5 , since the ultrasonic generator 130 included in the present invention is configured such that the suction unit 121 is disposed at a position corresponding to the filter element 110 , the generation of the suction unit 121 is generated in the suction unit 121 . It may be configured in a structure/shape in which backwash water can be smoothly introduced into the suction unit 121 while minimizing interference with the suction pressure.

In the embodiment of FIG. 4 , in the ultrasonic generator 130 , the cross-sectional area decreases in the direction toward the filter element 110 , and the tapered part 131 may be formed to be tapered. The flow is guided by the tapered part 131 , and accordingly, the backwash water is naturally introduced into the suction part 121 .

As another embodiment of the ultrasonic generator 130 , referring to FIG. 5 , the ultrasonic generator 130 of the present invention is provided with a plurality of through passages 133 , and the backwash water is ultrasonically generated through the through passages 133 . It can be smoothly introduced into the suction part 121 through the part 130 .

In particular, in the embodiment of FIG. 5 , the pressurized water supplied to the ultrasonic generator 130 may be sprayed in the direction of the filter element 110 through the through passage 133 , and while the pressurized water passes through the through passage 133 , Microbubbles may be formed in the pressurized water while receiving vibration from the ultrasonic generator 130 . When the pressurized water containing microbubbles is injected into the filter element 110, foreign substances from the filter element 110 can be more effectively removed during the backwashing process. Such pressurized water may be injected simultaneously or intermittently while the ultrasonic generator 130 is operating.

Meanwhile, the embodiments of FIGS. 4 and 5 may be combined with each other. That is, the tapered portion 131 and the through passage 133 may be simultaneously formed in the ultrasonic wave generator 130 .

As described above, in the backwash filter device 100 according to an embodiment of the present invention, the suction unit 121 of the backwash scanner 120 is positioned inside the filter element 110 , and the filter element is positioned at a corresponding position. (110) Since the ultrasonic generator 130 is positioned on the outer side, the backwashing scanner 120 is reverse washed by applying vibration by ultrasonic waves to the portion of the filter element 110 in which backwashing is performed and simultaneously spraying pressurized water. It is possible to more effectively remove foreign substances caught in the filter element 110 together with the suction action by the cleaning scanner 120 .

6 is an embodiment of the suction part of the backwash scanner provided in the backwash filter device according to the present invention.

Referring to FIG. 6 , the suction unit 121 of the backwash scanner 120 according to an embodiment of the present invention may further include a collection guide 121a extended in an approximately 'V' shape. By increasing the collection area through the collection guide 121a, the total amount of foreign substances (filtration residues) sucked into the backwash scanner 120 can be increased. As a result, it is possible to maintain the filtration performance of the filter element 110, and it is possible to more effectively prevent the accumulation of filter residues.

Here, the collecting guide 121a also performs a function of a scraper for scraping the filter residue layer accumulated on the filter element 110 . If necessary, a rotating or fixed brush may be mounted on the collecting guide 121a.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: backwash filter device
110: filter element
120: backwash scanner
130: ultrasonic generator
140: driving unit
150: control unit
160: position measurement unit
170: separation distance measurement unit
180: water quality monitoring unit

Claims (10)

a housing having an inlet and an outlet;
a filter element disposed inside the housing and formed in a hollow cylindrical shape to filter the fluid introduced through the inlet;
a backwash scanner having one end rotatably installed in the center of the housing and the other end disposed adjacent to the inner surface of the filter element, rotating and having a suction unit for sucking backwash water; and
The backwash filter device comprising a; an ultrasonic wave generator disposed adjacent to the outer surface of the filter element to correspond to the position of one end of the backwash scanner.
The method according to claim 1,
A backwash filter device, further comprising: a position measuring unit for acquiring position information of one end of the backwashing scanner;
3. The method according to claim 2,
Backwashing filter device, further comprising a separation distance measuring unit for measuring the separation distance between the ultrasonic generator and the filter element.
4. The method of claim 3,
Further comprising a water quality monitoring unit to monitor the water quality,
the control unit,
A backwash filter device for controlling the distance between the ultrasonic generator and the filter element by controlling the driving unit based on at least one of the water quality information obtained from the water quality monitoring unit, the amount of foreign substances, and the type of foreign substances.
The method according to claim 1,
Ultrasonic generator,
A backwash filter device, which is formed to be tapered by decreasing a cross-sectional area in a direction toward the filter element.
The method according to claim 1,
Ultrasonic generator,
A backwash filter device having a plurality of through passages.
The method according to claim 1,
Ultrasonic generator,
A backwash filter device comprising a plurality of units, and configured to operate only one ultrasonic generator closest to one end of the backwash scanner.
The method according to claim 1,
Backwash filter device,
A backwash pipe for discharging the sucked backwash water is provided, and a backwash flow rate control valve is installed in the backwash pipe,
A treated water discharge flow control valve is installed at the discharge part of the housing,
Backwashing performed by the backwash scanner is the first in which the backwash flow rate is maintained in the range of 0.1% to 2% of the backwash water flow rate introduced through the inlet by adjusting the opening degree of the backwash flow rate control valve and the treated water discharge flow rate control valve. A backwash filter device configured to be operated separately in a backwash mode and a second backwash mode in which the backwash flow rate is maintained in the range of 1% to 10% of the flow rate of the backwash water introduced through the inlet.
The method according to claim 1,
The conversion from the first backwashing mode to the second backwashing mode is,
A backwash filter device that is performed based on the difference between the inlet pressure of the inlet and the outlet pressure of the outlet.
The method according to claim 1,
The suction part of the backwash scanner,
A backwash filter device further comprising a collection guide.

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