KR102260152B1 - Cyclone type disk filter - Google Patents

Abstract

The present invention includes a housing having a drain, an inlet and an outlet, and divided into an upper space and a lower space by a central separation plate; a disk guide pipe provided with a plurality of inlet holes on an outer circumferential surface and extending over an upper space and a lower space of the housing; a plurality of filtering disks having a predetermined pattern of filtering grooves and stacked in the lower space of the housing with the disk guide pipe as an axis; a floating device disposed in the upper space of the housing, having a floating space filled with air therein, and floating by the fluid introduced into the housing so that the filter disks are in close contact with each other; and a contaminant discharging means for discharging contaminants contained in the fluid to the outside of the housing by generating a swirling flow in the lower space of the housing.

Description

Cyclone type disk filter

The present invention relates to a cyclonic disk filter capable of performing filtration and cleaning functions by changing the spacing between filter disks using buoyancy and discharging pollutants using a cyclone separation method.

A large amount of industrial water is used in industrial sites such as steel mills, shipyards, and petrochemical plants, and the used industrial water contains various inorganic and organic substances that are harmful to the human body and the natural environment. A large-scale water treatment facility is installed at industrial sites to filter wastewater containing these hazardous substances and then use or discharge it again as industrial water. In addition, the water treatment facility may be used for pretreatment of seawater desalination facilities, and for water treatment of sewage treatment plants, fish farms, cooling towers, and the like. And, such a water treatment facility is provided with a large amount of filtration devices for filtering sewage / wastewater, sewage, and the like.

Various filtration methods such as performing water treatment using fiber yarns or performing water treatment using fiber fragments may be used in such a filtration device.

Here, the filtration device using a fiber yarn bundles several fine fiber yarns into a bundle to make a fiber filter material, and twists, presses, or pulls it using a mechanical device to apply force to the fiber yarn bundle filter material to densely aggregate the fiber filter material. This is a method to have a filtration function. However, a filtration device using a fiber yarn requires a device for mechanically densely aggregating and unwinding the fiber yarn, and such a mechanical device has a disadvantage in that the structure is complicated and expensive.

On the other hand, the filtration device using fiber fragments uses the principle that floating fiber fragments float on water. When a large amount of fiber fragments are put in a pressure vessel and water is introduced into the pressure vessel from the lower part, the fiber fragments float to the top of the pressure vessel. In close contact with each other, the voids between the fiber pieces become smaller, so that the filtering function can be performed. However, in the filtration device using the fiber pieces, the filtration performance is poor because the formed pores are not dense because the fiber pieces are in close contact with each other only by buoyancy to form pores, and the filtration area is limited to the cross-sectional area of the pressure vessel, so there is a problem that the amount of filtration is small have.

In order to solve this problem, the present applicant applied for and received a patent (No. 10-2017-0081634) entitled 'disc filter' on June 28, 2017. The above patent of the present applicant has the advantage of being able to perform filtering and cleaning functions by changing the spacing between the filtering disks using buoyancy.

However, such a disc filter has a problem in that, when a large amount of suspended substances such as seaweeds are introduced, an operating time is shortened due to a rapid increase in differential pressure and filtration efficiency is lowered. In addition, when a contaminant such as oil is introduced into the disk, it is not filtered, and the contaminant is attached to the disk, thereby reducing filtration efficiency.

Prior Art Document 1: Registered Patent Publication No. 10-0712643 (2007. 5. 2.)

Prior Art Document 2: Registered Patent Publication No. 10-1814618 (2017.12.27.)

The present invention was invented to solve the above problems, and it is an object of the present invention to provide a cyclone-type disc filter capable of increasing filtration efficiency by discharging suspended substances such as algae or pollutants such as oil so that they do not adhere to the filtration disc. do it with

In order to achieve the above object, the present invention has a drain on the bottom, an inlet on the lower side, an outlet on the upper surface, and is divided into an upper space and a lower space by a central separator, and the separation The plate has a housing provided with a through hole; a disk guide pipe having a plurality of inlet holes on an outer circumferential surface, the disk guide pipe being inserted into the through hole and extending over an upper space and a lower space of the housing; a plurality of filtering disks having filtering grooves of a predetermined pattern on the surface and stacked in the lower space of the housing with the disk guide pipe as an axis; A floating device coupled to the upper end of the disk guide pipe and disposed in the upper space of the housing, having a floating space filled with air therein, and floating by the fluid introduced into the housing so that the filter disks are in close contact with each other ; and a contaminant discharging means for generating a swirling flow in the lower space of the housing to discharge contaminants contained in the fluid to the outside of the housing.

Preferably, the apparatus further includes an auxiliary floating device installed at a lower end of the disk guide pipe, wherein the auxiliary floating device has a floating space filled with air therein.

Here, the pollutant discharge means may include a pollutant discharge port formed on the upper side of the lower space of the housing to be shifted from the inlet in the longitudinal direction of the housing.

Preferably, the contaminant discharge means further comprises a partition wall formed to surround the filter disks in the lower space of the housing.

More preferably, the partition wall located below the inlet is characterized in that it has a plurality of openings disposed at a predetermined distance along the circumferential direction at the lower portion.

Additionally, it is characterized in that a spring is installed between the floating device and the separation plate to keep the distance between the filter disks in the back cleaning mode.

On the other hand, the floating device has an air hole formed on an upper surface, a fastening bolt sealing the floating space is fastened to the air hole, and a lower surface of the floating space has a skirt formed by extending an edge downward, and the skirt is fastened to the disk guide pipe by means of a fastening bolt and detachable, and a plurality of washing water inlet holes spaced apart from each other along the circumferential direction are formed at the lower end of the skirt.

The present invention increases the filtration efficiency of the filtration disks in the filtration mode by discharging contaminants such as suspended substances such as algae or oil that may contaminate the disk filter to the outside of the housing in advance while performing the filtration mode of the disk filter can do it

In addition, the present invention can perform the filtering function and backwashing function by simply adhering or separating the filter disks by using the buoyancy of the floating device without requiring a separate driving device for closely contacting or separating the filter disks. .

1 is a perspective view showing a cyclonic disk filter according to the present invention;
2 is a side view showing a cyclonic disk filter according to the present invention;
3 is a side configuration diagram showing a cyclone-type disk filter according to the present invention in filtration mode;
4 is a side configuration diagram showing a cyclonic disk filter according to the present invention in a back cleaning mode;
5 is an exploded perspective view illustrating a floating device, a disk guide pipe, and an auxiliary floating device of a cyclonic disk filter according to the present invention.

Hereinafter, a preferred embodiment of the cyclone disk filter according to the present invention will be described with reference to the accompanying drawings. For reference, in describing the present invention below, terms referring to the components of the present invention are named in consideration of the functions of each component, and therefore should not be construed as limiting the technical components of the present invention. will be

1 to 4, the cyclonic disk filter according to the present invention includes a housing 100 in which a fluid can be accommodated, a disk guide pipe 200 disposed in the longitudinal direction inside the housing 100, and a disk guide pipe. A plurality of filtration disks 300 disposed on the outer periphery of 200 , a floating device 400 for moving the disk guide pipe 200 by buoyancy, and pollutants for discharging contaminants adhering to the surface of the filtration disk 300 . exhaust means.

The housing 100 has a drain 110 on the bottom surface, an inlet 120 through which the fluid to be filtered flows in, and an outlet 130 through which the filtered fluid is discharged on the upper surface. In addition, the housing 100 is divided into an upper space 100A and a lower space 100B by a separation plate 140 disposed in the center. In addition, a through hole (not shown) is provided at the center of the separation plate 140 . This through hole is a portion into which the disk guide pipe 200 to be described later is inserted. Here, the housing 100 may be composed of two housings such that the upper space 100A and the lower space 100B are formed of separate parts, and the two housings may be coupled to each other by a flange fastening method.

The disc guide pipe 200 is formed of a hollow member having an open upper surface and an open lower surface. The disk guide pipe 200 has a plurality of inlet holes 210 on the outer circumferential surface. These inlet holes 210 serve to enable fluid movement between the upper space 100A and the lower space 100B of the housing 100 . In addition, the disk guide pipe 200 is inserted into the through hole of the separation plate 140 of the housing 100 and extends over the upper space 100A and the lower space 100B of the housing 100 .

The filtration disks 300 are annular members having an insertion hole in the center into which the disk guide pipe 200 can be inserted. In addition, the filtering disks 300 are provided with a predetermined pattern of filtering grooves (not shown) on the surface. These filtration grooves may extend in a straight or curved form along the radial direction of the filtration disk 300 . In addition, the shape and size of the filtering grooves may be determined according to the fluid to be filtered. Here, the filtering disks 300 are arranged to be stacked in the lower space 100B of the housing 100 with the disk guide pipe 200 as an axis. In addition, the fluid to be filtered may be filtered by the filtration grooves between the stacked filtration disks 300 . The filtration disks 300 may be made of a material such as nylon, polypropylene, or polyethylene. In addition, the filtering disks 300 may be vertically supported between the partition wall 500 and the auxiliary floating device 310 to be described later.

The floating device 400 is fastened to the upper end of the disk guide pipe 200 and is disposed in the upper space 100A of the housing 100 . The floating device 400 includes a floating space 410 (refer to FIG. 5 ) filled with air. When the fluid flows into the housing 100 by the buoyancy of the floating space 410 , the floating device 400 floats to the upper portion of the housing 100 . Accordingly, the disk guide pipe 200 connected to the floating device 400 also moves upward, and the filter disks 300 are in close contact with each other, so that the voids between the filter disks 300 are dense.

The pollutant discharge means generates a swirling flow of a fluid such as a cyclone in the lower space 100B of the housing to discharge suspended substances such as algae or oil contained in the fluid, that is, pollutants.

Specifically, the pollutant discharge means includes the pollutant discharge port 150 formed on the upper side of the lower space 100B of the housing 100 . In addition, the pollutant outlet 150 is disposed to be displaced from the inlet 120 in the longitudinal direction of the housing 100 .

When the fluid to be filtered flows into the lower space 100B of the housing 100 through the inlet 120 by the fluid supply means such as a pump by the configuration of the contaminant discharge means, the introduced fluid is the contaminant on the upper side. By generating a spiral swirling flow in the lower space 100B while moving toward the outlet 150 , the contaminants contained in the fluid are discharged toward the outlet 150 . At this time, the fluid supply means is operated in a state in which the floatation device 400 is floating in the filtration mode, that is, in a state in which the filtration disks 300 are closely attached.

Preferably, in order to create a solid swirling flow of fluid in the lower space 100B of the housing 100 , the contaminant discharge means comprises a partition wall 500 in the lower space 100B of the housing 100 . The partition wall 500 is formed in a shape corresponding to the shape of the housing 100 and the disk guide pipe 200 so as to surround the filtering disks 300 .

When the fluid to be filtered flows into the lower space 100B of the housing 100 through the inlet 120 by the configuration of the partition wall 500 , the introduced fluid flows along the partition wall 500 in the lower space 100B of the lower space 100B. By generating a swirling flow from the lower side to the upper side, the contaminants contained in the fluid are discharged toward the outlet 150 .

Therefore, by discharging pollutants such as algae or oil that may contaminate the filtration disk 300 to the outside of the housing 100 in advance using a pollutant discharge means while performing the filtration mode of the disc filter, in the filtration mode It is possible to increase the filtration efficiency of the filtration disks (300).

Preferably, the partition wall 500 located below the inlet 120 has a plurality of openings 511 disposed at a predetermined distance along the circumferential direction at the lower portion. The openings 511 serve as passages through which the fluid introduced into the lower space 100B of the housing 100 through the inlet 120 can be introduced into the filtration disk 300 side.

Additionally, a spring 600 is installed between the floating device 400 and the separation plate 140 to keep the distance between the filter disks 300 within a predetermined range in the back cleaning mode. This spring 600 prevents the back cleaning efficiency of the filter disk 300 from being lowered by preventing the filter disks 300 from being too spaced apart when the floating device 400 descends in the back cleaning mode. plays a role

Meanwhile, referring to FIG. 5 , an air hole 420 is formed on the upper surface of the floating device 400 , and a fastening bolt 430 is fastened to the air hole 420 to seal the floating space 410 . Accordingly, the floating device 400 can be used as a buoy simply by fastening the fastening bolt 430 to the air hole 420 .

In addition, the lower surface of the floating space 410 of the floating device 400 is provided with a skirt 440 whose edge extends downward a predetermined length, and the skirt 440 is connected to the disk guide pipe ( ) by the fastening bolt 450 ( ). 200) and is fastened with the upper part. Accordingly, the floating device 400 can be simply fastened or separated from the disk guide pipe 200 by only fastening and disassembling the fastening bolt 450 .

In addition, a plurality of washing water inlet holes 460 spaced apart from each other along the circumferential direction are formed at the lower end of the skirt 440 of the floating device 400 . The washing water inlet holes 460 allow the fluid in the upper space 100A of the housing 100 to pass through the disk guide pipe 200 in a state in which the floating device 400 descends and comes into contact with the separation plate 140 . (100) to be introduced into the lower space (100B).

Additionally or preferably, an auxiliary floating device 310 may be provided at the lower end of the disk guide pipe 200 . The auxiliary floating device 310 has a floating space filled with air, similarly to the aforementioned floating device 400 . Therefore, when the fluid flows into the housing 100, the auxiliary floating device 310 first receives buoyancy before the floating device 400 receives buoyancy, and then the upper floating device 400 receives the buoyancy to receive the buoyancy of the disk guide pipe ( 200 is moved upward, so that the filter disks 300 are in close contact with each other, so that the voids between the filter disks 300 become dense. At this time, since the auxiliary floatation device 310 moves the disk guide pipe 200 upward using buoyancy from the time when the fluid starts to flow into the housing 100 , the disk guide by the auxiliary floatation apparatus 310 . The pipe 200 is movable upward simultaneously with the inflow of the fluid. That is, by the auxiliary floating device 310, the filtering disks 300 may be in close contact with each other at the same time as the fluid is introduced.

If the disc guide pipe 200 is moved upwardly using only the buoyancy of the floating device 400 without the auxiliary floating device 310 , the time difference between the fluid inflow time and the floating device 400 receiving the buoyancy force is present, the untreated water in the lower space 100B is not filtered by the filter disks 300 in a state in which the filter disks 300 are not in close contact with each other, but is introduced into the upper space 100A as it is. .

However, in the cyclonic disk filter according to the present invention, the auxiliary floating device 310 starts to receive buoyancy from the time when the fluid starts to flow into the housing 100 by the above-described auxiliary floating device 310, so that the lower space ( The fluid introduced into 100B) may be filtered by the filtration disks 300 in close contact with each other and introduced into the upper space.

Meanwhile, the auxiliary floating device 310 includes an insertion protrusion 311 fitted to the lower end of the disk guide pipe 200 . And, the insertion protrusion 311 and the disk guide pipe 200 are fastened by the fastening bolts 330 , so that the auxiliary floating device 310 is connected to the disc guide pipe 200 only by fastening and disassembling the fastening bolts 330 . It can be easily fastened and detached.

Hereinafter, the operation and effect of the disk filter according to the present invention will be described with reference to FIGS. 3 and 4 .

First, referring to FIG. 3 , in the filtration mode for filtering the fluid to be filtered, the inlet 120 , the outlet 130 , and the pollutant outlet 150 of the housing 100 are opened, and the inlet 120 is closed. The fluid is introduced into the lower space 100B of the housing 100 through the . At this time, the fluid introduced into the inlet 120 generates a spirally swirling flow along the outer periphery of the partition wall 500 , and accordingly, the contaminants contained in the fluid, that is, the suspended matter, move along the outlet 150 to the housing 100 . is discharged to the outside of Accordingly, contaminants included in the fluid, for example, suspended substances such as algae or oil, may be discharged to the outlet 150 by the swirling flow of the fluid, similar to the cyclone dust collection method. Therefore, suspended substances such as algae or oil contained in the fluid do not flow into the filtering disk 300 side, so that the filtering efficiency of the filtering disk 300 can be maintained.

In addition, at the same time as pollutants are discharged from the lower space 100B of the housing 100 , a fluid is filled in the lower space 100B through the opening 511 of the partition wall 500 , and this fluid is transferred to the disc guide pipe 200 . ) through the upper space (100A), the interior of the housing 100 is in a state in which the fluid is filled as a whole. Then, the floating device 400 and the disk guide pipe 200 move upward by the buoyancy force of the floating space 410 and the auxiliary floating device 310 of the floating device 400, and thus the filtering disks 300 are in close contact with each other so that the voids between the filter disks 300 are dense. Accordingly, the fluid introduced into the partition wall 500 from the lower space 100B of the housing 100 is filtered through the filtration grooves of the filtration disks 300 , and the filtered fluid is filtered through the lower space 100B of the housing 100 . ) flows into the inside of the disc guide pipe 200 through the fluid holes 210 of the disc guide pipe 200 in the housing 100 through the fluid holes 210 of the disc guide pipe 200 again. is introduced into the upper space 100A. In addition, the fluid in the upper space 100A is discharged to the outside of the housing 100 through the outlet 120 of the housing 100 .

On the other hand, when the contaminants that have not been discharged through the outlet 150 are attached to the filtration disks 300 for a long time, the differential pressure inside the disk filter rises and the filtration performance deteriorates. Accordingly, after a predetermined filtration time has elapsed, or when the differential pressure exceeds a predetermined value, the back cleaning mode of the disk filter is performed. Referring to FIG. 4 , in the reverse cleaning mode, the inlet 120 and the outlet 150 are closed, and all of the fluid filled in the housing 100 through the drain 110 of the housing 100 flows into the housing 100 ) is discharged to the outside of Then, the floating device 400 descends so that the skirt 440 of the floating device 400 is located substantially adjacent to the separating plate 140 . Then, the cleaning fluid is supplied to the upper space 100A of the housing 100 through the outlet 130 of the housing 100 . Then, the cleaning fluid in the upper space 100A of the housing 100 flows through the cleaning water inlet holes 460 of the skirt 440 and the fluid holes 210 of the disk guide pipe 200 into the lower space 100B. At this time, the cleaning fluid passes through the filtration grooves of the filtration disks 300 in the reverse direction (in a direction opposite to the fluid direction during filtration) to remove suspended substances adhering to the filtration disks 300 . Then, the removed suspended matter is discharged to the outside of the housing 100 through the drain 110 of the housing 100 together with the cleaning fluid.

Claims (7)

a housing having a drain on a bottom surface, an inlet on a lower side, an outlet on an upper surface, divided into an upper space and a lower space by a central separator, the separator having a through hole;
a disk guide pipe having a plurality of inlet holes on an outer circumferential surface, the disk guide pipe being inserted into the through hole and extending over the upper space and lower space of the housing;
a plurality of filtering disks having filtering grooves of a predetermined pattern on the surface and stacked in the lower space of the housing with the disk guide pipe as an axis;
A floating device coupled to the upper end of the disk guide pipe and disposed in the upper space of the housing, having a floating space filled with air therein, and floating by the fluid introduced into the housing so that the filter disks are in close contact with each other ; and
Contaminant discharge means for discharging the contaminants contained in the fluid to the outside of the housing by generating a swirling flow in the lower space of the housing,
A cyclone disk filter, characterized in that a spring is installed between the floating device and the separation plate to maintain a distance between the filter disks in a back cleaning mode.
According to claim 1,
and an auxiliary floating device installed at a lower end of the disk guide pipe, wherein the auxiliary floating device has a floating space filled with air therein.
3. The method of claim 1 or 2,
The pollutant discharge means,
and a contaminant discharge port formed on the upper side of the lower space of the housing to be shifted from the inlet in the longitudinal direction of the housing.
4. The method of claim 3,
The contaminant discharging means further comprises a partition wall formed to surround the filtering disks in the lower space of the housing.
5. The method of claim 4,
The partition wall located below the inlet is a cyclone disk filter, characterized in that provided with a plurality of openings arranged at a predetermined interval in the circumferential direction at a lower portion spaced apart.
According to claim 1,
The floating device has an air hole formed on an upper surface thereof, a fastening bolt sealing the floating space is fastened to the air hole, and a lower surface of the floating space includes a skirt formed by extending an edge downward, and the skirt is fastened A cyclone disk filter, characterized in that it is detachable by being fastened to the disk guide pipe by bolts, and a plurality of washing water inlet holes spaced apart from each other along the circumferential direction are formed at the lower end of the skirt. delete

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