KR102590332B1 - 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, one end of which is rotatably installed in the center of the housing and the other end of which is disposed adjacent to the inner surface of the filter element and rotates to suck backwash water; and an ultrasonic generator disposed adjacent to the outer surface of the filter element to correspond to the position of one end of the backwash scanner.

Description

Backwashing filter device{FILTER APPARATUS WITH BACK FLUSHING FUNCTION}

The present invention relates to a backwashing filter device, and more specifically, to a backwashing filter device that enables backwashing.

In general, facilities such as ship ballast water treatment devices, sewage/wastewater treatment devices, and land/offshore plants are equipped with filter devices to reduce the concentration of pollutants and discharge them in accordance with discharge standards.

As an example of the use of this filter device, after removing vessel fouling to prevent biofouling, it can be applied to filter treated water containing the removed vessel fouling.

During the filtration process of the filter device, foreign substances larger than the pores become trapped in the filter element and accumulate, and a backwashing process is performed to prevent the pores of the filter element from clogging.

In the conventional backwashing process, foreign substances caught in the filter element are removed by rotating a scanner.

However, since the foreign substances caught in the filter element are of various types and sizes and have different degrees of jamming, some foreign substances are released from the filter element by the suction pressure of the scanner, but there is a problem in that some foreign substances remain in the filter element and cannot be removed. there was.

Korean Patent No. 10-1461719

The present invention was devised to solve the above problems, and in particular, its purpose is to provide a backwashing filter device that can maximize the removal efficiency of foreign substances stuck in the 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, one end of which is rotatably installed at the center of the housing and the other end of which is disposed adjacent to the inner surface of the filter element, rotates, and has a suction unit for sucking backwash water; and an ultrasonic 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 location information of a backwash scanner, a driving unit that moves the position of the ultrasonic generator, and a driving unit that receives the position information of the backwash scanner. It may further include a control unit that controls.

In addition, the backwashing filter device according to an embodiment of the present invention may further include a separation distance measuring unit that measures 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 that monitors water quality, and the control unit monitors 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 this, the separation distance between the ultrasonic generator and the filter element can be adjusted by controlling the driving unit.

In one embodiment of the present invention, the ultrasonic generator may be formed to be tapered with its cross-sectional area decreasing in the direction toward the filter element.

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

In addition, 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 be configured to operate.

The backwash filter device according to an embodiment of the present invention is provided with a backwash pipe that discharges 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 installed in the discharge part of the housing. Backwashing, which is installed and performed using a backwashing scanner, adjusts the opening degree of the backwashing flow control valve and the treated water discharge flow control valve to maintain the backwashing flow rate in the range of 0.1% to 2% of the backwashing water flow rate flowing in through the inlet. It can be configured to operate separately in a first backwash mode in which the backwash flow rate is maintained in the range of 1% to 10% of the backwash water flow rate flowing in through the inlet.

Here, the conversion from the first backwash mode to the second backwash mode may be performed based on the difference between the inlet pressure of the inlet portion and the discharge pressure of the discharge portion.

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

According to the present invention, by providing both a scanner and an ultrasonic generator, foreign substances are separated from the filter element by vibration generated by ultrasonic waves, and at the same time, the foreign substances are removed by the suction pressure of the scanner, thereby improving the efficiency of removing foreign substances.

In addition, according to the present invention, the ultrasonic generator and the scanner are located in different spaces centered on the filter element, so that the suction action of the scanner or the transmission of vibration generated by the ultrasonic generator can be performed smoothly without interference with each other. There is.

In addition, according to the present invention, by forming a through passage in the ultrasonic generator and spraying pressurized water, micro bubbles are generated, which has the effect of more effectively separating foreign substances.

1 is a side view of a backwash filter device according to an embodiment of the present invention;
Figure 2 is a cross-sectional view taken in the direction A-A' of Figure 1,
Figure 3 is a configuration diagram of a backwash filter device according to an embodiment of the present invention;
Figure 4 shows an example of an ultrasonic generator provided in the backwashing filter device according to the present invention.
Figure 5 shows another embodiment of the ultrasonic generator provided in the backwashing filter device according to the present invention;
Figure 6 is an example of the suction part of the backwash scanner provided in the backwash filter device according to the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. The suffixes "part" and "unit", "module" and "part", "unit" and "part", "device" and "system", etc. for components used in the following description are only considered for the ease of preparing the specification. It is given or used interchangeably, and does not have a distinct meaning or role in itself.

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

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components 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 said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention.

FIG. 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. This is the configuration diagram.

1 to 3, the 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 the housing 101. It includes a backwash scanner 120 rotatably installed at the center of the and an ultrasonic generator 130 disposed outside the filter element 110.

The housing 101 is provided with an inlet portion 101a on one side to allow fluid to flow in and filter out foreign substances of a predetermined size or smaller contained in the fluid, and an outlet portion 101b on the other side, and has a filter element inside. (110), the backwash scanner 120, and the ultrasonic generator 130 may be provided in a substantially cylindrical shape with an accommodating space in which they can be installed.

The filter element 110 is installed inside the housing 101 to filter fluid. According to the illustrated embodiment, the filter element 110 is formed in a hollow cylindrical shape so that it can be seated inside the cylindrical housing 101, and the fluid flowing in through the inlet 101a of the housing 101 flows into the filter element. After being moved to the internal hollow part of 110, the fluid passes through the filter element 110 and is discharged through the discharge part 101b of the housing 101, thereby filtering the fluid.

Here, the filter element 110 may be formed in the form of a wedged wire or mesh, and the material may be made of steel or plastic, which has excellent durability and corrosion resistance and is easy to process. You can.

Filtered foreign substances accumulate on the inner side of the filter element 110 according to an embodiment of the present invention. In order to prevent clogging by foreign substances, backwashing is performed to remove and remove the accumulated foreign substances from the inside of the filter element 110. must be performed.

In the present invention, for this backwashing operation, a backwash scanner 120 is rotatably installed in the housing 101 and one end is 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 rotatably installed in the center of the housing. With this configuration, when the motor 125 is driven, the suction part 121 of the backwash scanner 120 disposed adjacent to the inner surface of the filter element 110 rotates and is attached to the inner surface of the cylindrical filter element 110. Accumulated foreign substances are inhaled. The backwash scanner 120 is configured so that it can not only suck while rotating but also rise and fall in the vertical direction, allowing it to evenly suction the entire inner surface of the cylindrical filter element 110.

Here, the backwash scanner 120 according to an embodiment of the present invention is shown as having only one suction unit 121, but the present invention is not limited to this and may be provided with a plurality of suction units 121. When the plurality of suction parts 121 are provided in this way, the structure becomes complicated, but there is an advantage in that backwashing water can be suctioned through the plurality of suction parts 121, thereby shortening the backwashing process.

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

That is, when the backwash scanner 120 performs a backwash process of suctioning backwash water to a predetermined area (near the inner surface of the filter element 110) of the filter element 110, the corresponding position of the area (filter The ultrasonic generator 130 disposed near the outer surface of the element 110 operates and applies vibration to the filter element 110 to separate foreign substances accumulated and stuck in the filter element 110 to perform a more effective backwashing process. You can do it.

As such, in the present invention, the ultrasonic generator 130 and the backwash scanner 120 are located in different spaces centered on the filter element 110, so that the suction pressure of the backwash scanner 120 or the ultrasonic generator 130 ) can be transmitted smoothly without interfering with each other.

The backwashing filter device 100 according to an embodiment of the present invention includes a driving unit 140 that moves the position of the ultrasonic generator 130.

In one embodiment, the driving unit 140 is configured to move the ultrasonic generator 130 across the entire outer surface of the filter element 110 by rotating and/or raising and lowering it.

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 a backwash scanner. It may include a control unit 150 that receives position information of the suction unit 121 of 120 and controls the driving unit 140.

In this way, by including the driving unit 140, the position measuring unit 160, and the control unit 150, a backwash scanner 120 is installed near the inner and outer surfaces of the filter element 110, respectively, as described above. The suction part 121 and the ultrasonic generation part 130 can be positioned correspondingly.

Additionally, as shown in FIG. 3, the backwash filter device 100 according to an embodiment of the present invention includes a separation distance measuring unit that measures 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 that monitors water quality.

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

By being configured in this way, the backwashing filter device 100 according to an embodiment of the present invention reduces the separation distance between the ultrasonic generator 130 and the filter element 110 to improve water quality or foreign substances (e.g., ship attachments, marine debris). It can be appropriately adjusted according to the foreign matter that will accumulate in the filter element 110, such as the type, amount, size of foreign matter, etc. (organisms, etc.).

Although only one ultrasonic generator 130 according to an embodiment of the present invention is shown in the drawing, the present invention is not limited to this and a plurality of ultrasonic generators 130 may be provided at regular intervals (for example, four arranged on the front, rear, left and right sides).

In this case, the plurality of ultrasonic generators 130 may all operate simultaneously during the backwashing process, but only one end of the backwash scanner 120, that is, the one ultrasonic generator 130 closest to the suction unit 121, operates. It can be configured to do so. As a result, not only is the movement of the ultrasonic generator 130 minimized, but it is also possible to quickly operate the ultrasonic generator 130 in synchronization with the movement of the suction unit 121 of the backwash scanner 120.

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

For this purpose, the backwash scanner 120 according to an embodiment of the present invention is equipped with a backwash pipe 122 that discharges the sucked backwash water, and a backwash flow rate control valve 123 is installed in the backwash pipe 122. . In addition, an inlet pressure gauge 104 is installed at the inlet 101a of the housing 101, and a treated water discharge flow control valve 103 and an outlet pressure gauge 105 are installed at the outlet 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 controls the flow rate of backwash water sucked from the suction part 121 of the backwash scanner 120. ) and by adjusting the opening degree of the treated water discharge flow control valve 103, which controls the discharge flow rate of the filtered water discharged from the discharge unit 101b, a plurality of backwash modes with different backwash flow rates and backwash pressures can be implemented. do.

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

In the first backwash mode, the backwash flow rate control valve 123 is partially opened and the treated water discharge flow control valve 103 is fully opened, and backwash is performed at a relatively low backwash flow rate and relatively low backwash pressure. The cleaning scanner 120 may be rotated continuously or discontinuously (intermittently) to perform backwashing. Compared to the second backwash mode, it takes a relatively long time (for example, approximately 10 minutes) and can occupy most of the time of the backwash process.

This first backwash mode can prevent or delay deterioration of the filtration performance of the filter element 110 by continuously or discontinuously sucking in foreign substances (filtration residues) accumulated on the inner surface of the filter element 110. .

Continuous operation or discontinuous operation (intermittent operation) in the first backwash mode can be determined based on the 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 gradient of differential pressure is low, filtering is performed smoothly, so intermittent operation is performed, and when the gradient of differential pressure is high, the amount of foreign substances accumulated in the filter element 110 has increased, so it is necessary to suction them. Continuous operation can be performed in the first backwash mode.

The second backwash mode may be performed when the difference between the pressure measured by the inlet pressure gauge 104 and the pressure measured by the discharge pressure gauge 105 becomes higher than a predetermined threshold. In this case, it is determined that the filtration capacity of the filter element 110 has been significantly reduced due to the accumulation of foreign substances, and the backwash flow rate and backwash pressure are operated at a higher level than in the first backwash mode, thereby allowing foreign substances to be sucked in in a short period of time.

In this second backwash mode, the backwash flow rate control valve 123 is fully opened and the treated water discharge flow 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 pressure is maintained by maintaining the inlet pressure in the range of 0.5 to 3 bar, and the backwash flow rate is controlled by adjusting the opening time (for example, approximately 10 to 120 seconds) of the treated water discharge flow control valve 103. The second backwash mode can be carried out in a relatively short time compared to the first backwash mode.

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

Meanwhile, the backwash filter device 100 according to an embodiment of the present invention may be provided with a pressurized water injection pipe 135 to supply pressurized water to the ultrasonic generator 130. Pressurized water injected from the pressurized water injection pipe 135 is sprayed from the ultrasonic generator 130 toward the filter element 110, thereby improving the backwashing effect, which will be explained in more detail later.

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

Referring to Figures 4 and 5, since the ultrasonic generator 130 included in the present invention is configured so that the suction part 121 is disposed at a corresponding position of the filter element 110, the ultrasonic waves generated in the suction part 121 It may be configured in a structure/shape that minimizes interference with the suction pressure and allows backwash water to flow smoothly into the suction part 121.

In the embodiment of FIG. 4 , the ultrasonic generator 130 may have a tapered portion 131 whose cross-sectional area decreases in the direction toward the filter element 110 and is tapered. The flow is guided by the tapered part 131, and as a result, backwash water naturally flows 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, so that backwash water generates ultrasonic waves through the through passages 133. It can pass through the part 130 and flow smoothly into the suction part 121.

In particular, in the embodiment of FIG. 5, the pressurized water supplied to the ultrasonic generator 130 may be sprayed toward the filter element 110 through the through passage 133. 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 pressurized water containing microbubbles is sprayed onto the filter element 110, foreign substances from the filter element 110 can be removed more effectively during the backwashing process. This pressurized water may be injected simultaneously or intermittently while the ultrasonic generator 130 is operating.

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

As described above, the backwash filter device 100 according to an embodiment of the present invention has the suction part 121 of the backwash scanner 120 located inside the filter element 110, and the filter element at the corresponding position. (110) The ultrasonic generation unit 130 is located on the outside, so that vibration by ultrasonic waves is applied to the filter element 110 where backwashing of the backwashing scanner 120 is performed and at the same time spraying pressurized water to perform reverse washing. Together with the suction action by the cleaning scanner 120, foreign substances stuck in the filter element 110 can be removed more effectively.

Figure 6 is an example 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 part 121 of the backwash scanner 120 according to an embodiment of the present invention may further include a collection guide 121a extending approximately in a '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, the filtration performance of the filter element 110 can be maintained and the accumulation of filtration residue can be more effectively prevented.

Here, the collection guide 121a also functions as a scraper to scrape off the filtration residue layer accumulated on the filter element 110. If necessary, a rotating or fixed brush may be mounted on the collection guide 121a.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights 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, one end of which is rotatably installed at the center of the housing and the other end of which is disposed adjacent to the inner surface of the filter element to rotate and rise and fall, and which is provided with a suction unit for sucking backwash water; and
The backwash scanner is disposed adjacent to the outer surface of the filter element to rotate and rise and fall to correspond to the position of one end, and is provided with a plurality of through passages that spray in the direction of the filter element, and causes vibration in the pressurized water passing through the through passages. A backwash filter device comprising: an ultrasonic generator that generates microbubbles.
In claim 1,
A backwashing filter device further comprising a position measuring unit that acquires positional information of a backwashing scanner, a driving unit that moves the position of the ultrasonic generator, and a control unit that receives positional information of the backwashing scanner and controls the driving unit.
In claim 2,
A backwash filter device further comprising a distance measurement unit that measures the distance between the ultrasonic generator and the filter element.
In claim 3,
It further includes a water quality monitoring unit that monitors water quality,
The control department,
A backwash filter device that controls the separation distance between the ultrasonic generator and the filter element by controlling the driving unit based on at least one of water quality information, amount of foreign matter, and type of foreign matter obtained from the water quality monitoring unit.
In claim 1,
The ultrasonic generator,
A backwash filter device in which the cross-sectional area decreases in the direction toward the filter element and becomes tapered.
In claim 1,
The ultrasonic generator,
A backwashing filter device is provided with a plurality of devices and configured to operate only one ultrasonic generator closest to one end of the backwashing scanner.
In claim 1,
The backwash filter device,
It is provided with a backwash pipe that discharges the sucked backwash water, and a backwash flow control valve is installed in the backwash pipe.
A treated water discharge flow control valve is installed in the discharge part of the housing,
Backwashing performed in the backwashing scanner is performed by adjusting the opening degree of the backwashing flow rate control valve and the treated water discharge flow control valve, so that the backwashing flow rate is maintained in the range of 0.1% to 2% of the backwashing water flow rate flowing in through the inlet. A backwash filter device configured to operate 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 backwash water flow rate introduced through the inlet.
In claim 1,
The conversion from the first backwash mode to the second backwash mode is,
A backwashing filter device that is performed based on the difference between the inlet pressure of the inlet and the discharge pressure of the outlet.
In claim 1,
The suction part of the backwash scanner is,
A backwash filter device further comprising a collection guide. delete