WO2018044137A1

WO2018044137A1 - Backwashing filter device

Info

Publication number: WO2018044137A1
Application number: PCT/KR2017/009694
Authority: WO
Inventors: 박규원; 김성태; 이해돈; 김대원; 정일희
Original assignee: (주) 테크로스
Priority date: 2016-09-05
Filing date: 2017-09-05
Publication date: 2018-03-08

Abstract

The present invention relates to a backwashing filter device comprising: a filter housing provided with an inlet and an outlet; a filter part embedded in the filter housing and comprising a plurality of filter elements for filtering fluid introduced through the inlet; and a backwashing part comprising a washing water inlet provided at an upper part of the filter part, a watering water outlet provided at a lower part of the filter part, and a backwashing pump provided at the watering water inlet, wherein, in a backwashing mode, the backwashing part supplies washing water to the filter part from the upper part of the filter part toward the lower part thereof, thereby discharging foreign substances attached to the filter part to the outside of the filter housing.

Description

Backwash filter unit

The present invention relates to a backwash filter device for filtering foreign substances and sucking and discharging solid matter accumulated therein.

In general, facilities such as a ballast water treatment apparatus of a ship, a treatment apparatus such as oil, wastewater, and wastewater, a land / sea plant, etc. are equipped with a filter device for reducing the concentration of pollutants in accordance with the emission standards and discharged. .

Korean Patent No. 10-1461719 discloses an automatic backwash filter device using a lower backwashing and an internal multi-stage split pipe in order to increase the filtration and backwashing efficiency by uniformizing the flow rate distribution. However, this backwash filter device was difficult to completely suck out the solids accumulated in the upper filtration element because backwashing was performed only at the bottom.

U.S. Patent No. 6,890,434 discloses a backwash filter for filtering lubricating oil, which has a structure in which solids are sucked into the upper backwash suction part, the blocking element in the lower part blocks the lower part, and non-suctioned solids fall out of the filter housing during the filtration process. To start. However, since this backwash filter sucks solids only upwards, the backwashing efficiency of the lower element is inferior, and there is a problem that heavy solids accumulate in the filter housing.

As such, in filtration of conventional backwash filter devices, solids larger in size than the pores of the filtration element accumulate on the surface of the element and clog the surface, and solids smaller in size than the pores of the filtration element are formed inside the pores. Accumulate and clog the pores of the element.

In addition, when a high-viscosity solid is attached to the element, it is not easy to completely wash the viscous solids attached to the element by a conventional suction backwash method of the upper, lower, or upper and lower parts.

In addition, in the case of the backwash filter device applied to the ballast water treatment device of the ship, the pressure flowing into the filter is changed according to the position of the treatment device. For example, depending on the location of the treatment device, the inlet pressure of the filter varies from negative pressure to positive pressure. When the backwashing action is performed under negative pressure or low pressure, perfect backwashing of the filter is impossible.

The present invention has been invented to solve the above problems, by maintaining a constant backwashing performance by maintaining a high pressure backwashing pressure apart from the surrounding pressure conditions, the surface clogging of the filter, pore clogging and viscous microorganisms It is an object of the present invention to provide a backwash filter device capable of eliminating all blockages.

In order to achieve the above object, the present invention provides a filter housing having an inlet and an outlet; A filter part embedded in the filter housing and comprising a plurality of filter elements for filtering the fluid introduced through the inlet; And a washing water inlet provided in the upper part of the filter part, a washing water outlet provided in the lower part of the filter part, and a backwash pump provided in the washing water inlet side, and the filter part from the upper part to the lower part of the filter part in the back washing mode. And a back washing unit configured to supply washing water to discharge the foreign matter stuck to the filter unit to the outside of the filter housing.

Preferably, the backwashing unit, the rotary shaft is rotatably installed along the central axis of the filter unit in parallel with the filter elements; An upper arm rotatably installed according to the rotation of the rotary shaft, the upper arm being connected to an upper portion of at least one of the filter elements so that the washing water of the washing water inlet is supplied into the filter element; And a lower arm rotatably installed in accordance with the rotation of the rotary shaft, the upper arm being connected to a lower portion of the filter element to which the upper arm is connected so that the washing water and the foreign matter of the filter element are discharged to the outside of the filter housing through the washing water outlet. It is characterized by.

Preferably, further comprising a sensor unit for detecting the difference between the inlet side pressure and the outlet side pressure, and controls the motor and gear for driving the rotary shaft, the upper arm and the lower arm in accordance with the detection result of the sensor unit, By operating the on-off valve and the backwash pump installed on the washing water outlet side is characterized in that to run the backwash mode.

On the other hand, the filter housing is characterized in that it comprises a pair of fixing plates to which the top and bottom of the filter element is fixed, respectively, wherein the filter elements are arranged between the fixing plate along the circumferential direction around the axis of rotation. .

Here, between the pair of fixing plates are provided with fixing pipes for individually receiving the filter elements, the fixing pipe has openings in the upper and lower portions, respectively, and the upper opening of the fixing pipe is at the top of the filter element. Sealed and coupled to the edge, the lower end of the filter element is characterized in that the fluid is closed so as not to pass.

Preferably, the lower opening of the fixed pipe is characterized in that the vortex forming plate having a plurality of long holes or a plurality of spiral holes are arranged spaced apart from each other in the circumferential direction.

According to the present invention, since the backwash pump of the backwash unit is used irrespective of the pressure of the flow path in which the fluid flows in the filtration mode, it is possible to maintain a constant high pressure backwash pressure in the backwash mode. Therefore, it is possible to alleviate the surface blockage, the pore blockage and the blockage by the viscous microorganisms of the filter element.

1 is a side configuration diagram schematically showing a backwash filter device according to the present invention;

2a and 2b are plan views schematically showing the arrangement of the filter elements of the backwash filter device according to the invention;

Figure 3 is a schematic side view of the filter element and the fixed pipe of the backwash filter device according to the present invention,

4 is a side configuration diagram schematically showing a filter element and a fixed pipe of a backwash filter device according to the present invention in a form different from that of FIG.

5a and 5b are plan views schematically showing the lower fixing bracket of FIG.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the backwash filter device according to the present invention. For reference, in the following description of the present invention, terms referring to the components of the present invention are named in consideration of the function of each component, and should not be understood as a meaning of limiting the technical components of the present invention. Will be.

Referring to FIG. 1, the backwash filter device according to the present invention includes a filter housing 100, a filter part 200, and a backwash part.

The filter housing 100 is a cylindrical member having an inlet 110 at a lower side of one side and an outlet 120 at an upper side of the other side.

The filter unit 200 includes a plurality of filter elements 210, is mounted in the filter housing 100, and filters the fluid introduced into the filter housing 100 through the inlet 110. In addition, the fluid filtered through the filter unit 200 flows out of the filter housing 100 through the outlet 120 provided in the upper portion of the other side of the filter unit 200. Here, the filter element 210 is a cylindrical member, and may be formed in a wedged wire or mesh form and made of steel or plastic material. In addition, the filter element 210 may be finished using a sealing member made of steel or plastic at both ends to be fixed to the fixing plate 130 of the filter housing 100. In addition, the foreign matter filtered through the filter element 210 accumulates on the outer surface of the filter element, and may be removed when the backwashing proceeds due to the differential pressure between the inlet and the outlet.

The backwash unit may include a washing water inlet 310 provided in the filter housing 100 at an upper portion of the filter unit 200, a washing water outlet 320 provided at the filter housing 100 at a lower portion of the filter unit 200, and a washing water inlet ( 310 includes a backwash pump 330 installed on the side. The backwash unit forms a backwash line through which the wash water is discharged from the outside of the filter housing 100 to the outside of the filter housing 100 via the washing unit inlet 310, the filter element 210, and the washing water outlet 320. . Therefore, in the backwash mode, when the backwash pump 330 is operated, the backwashing unit supplies the washing water to the filter unit 200 from the upper side to the lower side of the filter unit 200 to provide the filter element of the filter unit 200 ( 210, the foreign matter stuck to the surface is discharged to the outside of the filter housing 100. Here, the washing water flowing into the washing water inlet 310 is preferably filtered water filtered through the filter unit 200.

As described above, the backwashing filter device according to the present invention uses the backwashing pump 330 of the backwashing unit irrespective of the pressure of the flow path in which the fluid flows in the filtration mode. The washing pressure can be maintained. Therefore, it is possible to eliminate all surface blockages, pore blockages, and blockages by the viscous microorganisms of the filter element 210.

Additionally, the backwash further includes a rotating shaft 36 that is rotated by the motor 340 and the gear 350, an upper arm 370 that rotates by the rotating shaft 360, and a lower arm 380.

The rotating shaft 360 is rotatably installed along the central axis of the filter unit 200 in parallel with the filter elements 210 at the center of the filter housing 100. The rotation shaft 360 is rotationally driven by the motor 340 and the gear 350 provided on the filter housing 100.

The upper arm 370 is connected to the rotating shaft 360 at the top of the filter unit 200 and configured to be rotatable along the rotating shaft 360. In addition, the upper arm 370 has a flow path therein, and serves to allow the washing water introduced from the washing water inlet 310 to enter the filter unit 200 through the upper arm 370 in the backwash mode. . Here, the upper arm 370 is connected with the top of at least one of the filter elements 210 to allow the wash water of the wash water inlet 310 to be supplied into the filter element 210.

The lower arm 380 is connected to the rotating shaft 360 at the bottom of the filter unit 200 and configured to be rotatable along the rotating shaft 360. In addition, the lower arm 380 has a flow path therein, and serves to allow the washing water and foreign substances discharged from the filter element 210 to be discharged to the washing water outlet 320 through the lower arm 380 in the backwash mode. Do it. Here, the lower arm 380 is connected to the lower portion of the filter element 210 to which the upper arm 370 is connected to allow the washing water and foreign substances discharged from the filter element 210 to be discharged to the outside of the filter housing 100.

As described above, the backwashing filter device according to the present invention forms a backwashing line having an upper arm 370 and a lower arm 380 facing the filter element 210, and wash water along the backwashing line. Since the backwash pressure is maintained at a constant high pressure, the backwashing effect is excellent compared to the backwashing effect due to the suction grip force of the pump of the conventional backwashing filter device or the pressure of the pipe (or inside the filter). .

Preferably, the backwash filter device according to the present invention further includes a sensor unit 150 for detecting a difference between the pressure of the inlet 110 side and the outlet 120 side of the filter housing 100. The on / off valve 390, the backwash pump 330, the rotating shaft 360, the upper arm 370, and the lower arm 380 installed on the washing water outlet 320 side are driven according to the detection result of the sensor unit 150. The backwash mode is performed by operating the motor 340 and the gear 350.

Specifically, if the difference between the pressure on the inlet 110 side of the filter housing 100 and the pressure on the outlet 120 side as a result of the detection of the sensor unit 150 is out of the preset range, the backwash mode is executed. Then, the open / close valve 390 is opened, the backwash pump 330 is operated, and the rotating shaft 360 is rotated by the operation of the motor 340 and the gear 350. At this time, the upper arm 370 and the lower arm 380 are connected to the upper and lower portions of at least one of the filter elements 210 by the rotation of the rotary shaft 360. Therefore, the washing water introduced into the upper side of the filter element 210 is discharged from the inside of the filter element 210 to the outside to wash the foreign matter adhered to the outside of the filter element 210.

Meanwhile, the filter housing 100 has a pair of fixing plates 130 to which upper and lower ends of the filter element 210 are fixed, respectively. That is, the filter unit 200 is mounted between the pair of fixing plates 130.

Referring to FIG. 2A, the filter elements 210 of the filter unit 200 are arranged between the fixing plates 130 along the circumferential direction about the rotation axis 360. Also, referring to FIG. 2B, the filter elements 210 may be arranged in two or more rings in a circumferential direction and a radial direction about the rotation axis 360.

Referring to FIG. 3, fixing pipes 140 are provided between the pair of fixing plates 130 to individually receive the filter elements 210. The fixed pipe 140 has

openings

141 and 142 at the top and the bottom, respectively. The upper opening 141 of the fixed pipe 140 is sealed and coupled with the top edge of the filter element 210. Alternatively, the upper opening 141 of the fixed pipe 140 may be welded to the top edge of the filter element 210. Accordingly, in the backwash mode, the washing water supplied from the upper arm 370 may only flow into the filter housing 100 through the opening 141 of the fixing plate 140. The lower end of the filter element 210 is closed so that no fluid can pass through it. For example, a closing cap 211 may be mounted at the bottom of the filter element 210. Accordingly, in the filtration mode, fluid flows into the space between the fixed pipe 140 and the filter element 210 through the lower opening 142 of the fixed pipe 140 and is filtered into the filter element 210. .

Preferably, referring to FIGS. 4 and 5A, in the lower opening 142 of the fixed pipe 140, a vortex forming plate 160 having a plurality of long holes 161 spaced apart from each other along a circumferential direction is provided. Can be mounted. Alternatively, referring to FIG. 5B, the vortex forming plate 160 may include a plurality of spiral long holes 161 ′ which are spaced apart from each other along the circumferential direction.

By this vortex forming plate 160, the fluid entering the filter element 210 in the filtration mode is subjected to rotational force through the

long holes

161, 161 ′ to be uniform over the entire surface of the filter element 210. Can be filtered.

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the protection scope of the present invention should be interpreted by the following claims. In addition, one of ordinary skill in the art to which the present invention pertains will be capable of various modifications and variations without departing from the essential characteristics of the present invention, all technical ideas within the scope equivalent to the present invention of the present invention It should be interpreted as being included in the scope of rights.

Claims

A filter housing having an inlet and an outlet;

A filter part embedded in the filter housing and comprising a plurality of filter elements for filtering the fluid introduced through the inlet; And

A washing water inlet provided in the upper part of the filter part, a washing water outlet provided in the lower part of the filter part, and a backwash pump provided in the washing water inlet side; And a backwashing unit for supplying the washing water to discharge the foreign matter stuck to the filter unit to the outside of the filter housing.
The method of claim 1,

The backwashing unit,

A rotating shaft rotatably installed along the central axis of the filter part in parallel with the filter elements;

An upper arm rotatably installed according to the rotation of the rotary shaft, the upper arm being connected to an upper portion of at least one of the filter elements so that the washing water of the washing water inlet is supplied into the filter element; And

It is installed rotatably in accordance with the rotation of the rotating shaft, the upper arm is connected to the lower portion of the filter element connected to include a lower arm to allow the washing water and foreign matter of the filter element is discharged to the outside of the filter housing through the washing water outlet A backwash filter device.
The method of claim 2,

And a sensor unit for detecting a difference between the inlet side pressure and the outlet side pressure, and controlling a motor and a gear driving the rotating shaft, the upper arm, and the lower arm according to a sensing result of the sensor unit. A backwash filter device, characterized in that for executing a backwash mode by operating an installed on / off valve and the backwash pump.
The method according to any one of claims 1 to 3,

The filter housing has a pair of fixing plates to which upper and lower ends of the filter element are respectively fixed, and the filter elements are arranged between the fixing plates along the circumferential direction about the rotation axis. Filter device.
The method of claim 4, wherein

Between the pair of fixing plates are provided fixing pipes for individually receiving the filter elements, the fixing pipes having openings in the upper and lower portions, respectively, the upper openings of the fixing pipes being connected to the upper edge of the filter element. Sealingly coupled and the bottom of the filter element is closed to prevent passage of fluid.
The method of claim 5,

And a vortex forming plate having a plurality of long holes or a plurality of spiral holes spaced apart from each other along the circumferential direction in the lower opening of the fixed pipe.