WO2019117370A1

WO2019117370A1 - Cassette-type filter device

Info

Publication number: WO2019117370A1
Application number: PCT/KR2017/014755
Authority: WO
Inventors: 황소용; 이성우; 김동희; 황교엽
Original assignee: 디에이치테크 주식회사
Priority date: 2017-12-14
Filing date: 2017-12-14
Publication date: 2019-06-20

Abstract

The purpose of the present invention is to provide a cassette-type filter device, which is used for the purpose of separating out solid matter sludge during various water treatment processes and, particularly, can adjust the mesh size of a mesh filter so as to filter out sludge of various sizes. That is, the present invention comprises: a casing (2) having a filter chamber (3) formed therein, and having, at the upper part thereof, a supply tube (4) into which waste water flows; a pair of drums (5), which have a plurality of through-holes (5a) formed on the outer surface thereof and are provided in parallel while being spaced from each other on the same horizontal surface inside the casing (2); a mesh filter (12) provided such that both end portions thereof are wound at least once around the outer circumferential surface of the pair of drums (5); a shaft (6) formed on one side axis of each drum (5) so as to be supported by a bearing; a reduction motor (7) connected to the shaft (6) so as to rotationally drive the drums (5); a discharge axial tube (8) formed on the other side axis of the drums (5) so as to be fixedly provided and supported by the bearing; a water purifying tube (10) connected with the discharge axial tube (8) by a rotary joint (9); and a wash water supply tube (15) for spraying, under the mesh filter (12) for connecting the pair of drums (5), high-pressure wash water toward the mesh filter (12).

Description

Cassette type filter device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette type filter device and more particularly to an apparatus for separating sludge of solid matter in various water treatment processes such as industrial water sludge purification treatment and food processing, The present invention relates to a cassette type filter device capable of performing such a cassette type filter device.

Generally, in the treatment of wastewater or industrial wastewater, it is common to first treat heavy sludge or impurities having a large particle size, and then treat the water using ozone or chemicals.

A variety of filtering techniques are known for this purpose. A representative prior art is disclosed in Korean Utility Model Registration No. 20-0420112, which is related to a submerged filtration device for water treatment. This is because of the long-term repeated use of the wastewater treatment device When a large amount of contaminants and foreign matter are deposited on the surface of the submerged filter, the compressed air is instantaneously forced into the submerged filter to rapidly remove foreign matter deposited on the submerged surface.

On the other hand, Korean Patent Publication No. 10-0993588 discloses a technique relating to a water treatment filter using a filter material for water treatment which can be repeatedly regenerated, and is composed of a plurality of pieces of nonwoven fabric for filtration or microfiber pieces, A plurality of filtering nonwoven fabric pieces or microfibers are uniformly compressed to form fine voids, and when the compression force is released, the voids formed between the plurality of filtering nonwoven fabric pieces are disassembled as the volume expands again, Technology used.

However, most of the above-mentioned prior art techniques have been complicated in structure, have a complicated exhausting means for removing solid sludge aggregated in the filtration process, have a short life span of the filter, and need to be frequently replaced.

In the present invention, a mesh filter is constructed in the form of a cassette wound with magnetic tape on two reels, and the number of turns of the mesh filter wound around the drum The gap of the filter can be adjusted according to the size of the filter,

The solid sludge agglomerates in the mesh filter during the filtration process has a new structure that can be cleaned in a short time and then switched to re-filtration by widening the pore of the filter when backflushing by the washing water sprayed through the washing water supply pipe It is an object of the present invention to provide a cassette type filter device.

According to a further aspect of the present invention, there is provided a cassette type filter device, wherein a pair of drums having a plurality of through holes are arranged side by side in a horizontal direction in a filter chamber formed inside a filter device, And the number of turns of the mesh filter can be adjusted by rotating the shaft of the drum by a drive motor.

The auxiliary filter chamber is formed below the filter chamber, and a pair of drums in which a mesh filter is wound is rotated by a deceleration motor. The purified water pipe of the filter chamber is connected to the upper portion of the auxiliary filter chamber. In order to discharge the fluid having passed through the mesh filter to the outside, a drainage shaft tube is formed on one side of the drum located in the auxiliary filter chamber and fixed to the bearing so as to be fixed to the bearing. The filtration chamber filters the large sludge, The present invention provides a cassette-type filter device configured to filter particles having a smaller particle size by a second mesh filter.

The cassette type filter device of the present invention has a relatively simple structure and a small volume so that filtration can be efficiently performed even in a limited space, and the filter is formed of a wire or polymer mesh, and thus the durability is excellent because there is less concern about wear and the like.

Especially, it is possible to filter various sizes of sludge by controlling the mesh size of the mesh filter by rotating the drum, thereby increasing the versatility. When the mesh filter is closed by the sludge, tension is applied to both sides of the mesh filter, The filter can be cleaned quickly and effectively by spraying through the nozzle.

In addition, when the filter chambers having the mesh filter wound on a pair of drums are stacked in two or more layers, the filter closing time can be shortened to prolong the filtration operation, and the cleaning time of the mesh filter can be shortened, It is expected that the effect will be much more.

1 is a front view showing a preferred embodiment of a cassette type filter device provided by the present invention;

2 is a plan view of a cassette type filter device

3 is an enlarged perspective view showing a main configuration of the cassette type filter device;

4 is a front sectional view showing the cleaning state of the mesh filter

5 is a front view showing another embodiment of the cassette type filter apparatus provided by the present invention.

6 is a state diagram showing a configuration of a wastewater treatment system to which the cassette type filter device provided in the present invention is applied

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing a preferred embodiment of the cassette type filter device provided in the present invention, FIG. 2 is a plan view of the cassette type filter device, and FIG. 3 is an enlarged perspective view of the main part of the cassette type filter device.

Referring to the drawings, a cassette type filter device 1 according to the present invention includes a casing 2 in a rectangular parallelepiped shape so that a filter chamber 3 is formed therein, and wastewater flows into an upper portion of the casing 2 An air vent 2a is provided to overpressure the inside of the supply pipe 4 and the inside of the filter chamber 3 or to prevent the occurrence of air pockets.

The lower part of the casing 2 forms a hopper 2b so that the filtered solid sludge can be easily collected at the center and a drain pipe 11 for draining the sludge collected at the lower end of the hopper 2b is connected do.

Although the casing of the filter device is shown as a rectangular parallelepiped in the figure, it may be formed in a cylindrical shape to improve the pressure resistance.

A pair of drums 5 having a plurality of through holes 5a formed on the outer surface of the casing 2 are arranged in parallel to each other on the same horizontal plane. Around the outer circumferential surface of each drum 5, So that the wastewater flowing into the filter chamber 3 is introduced into the drum 5 through the mesh filter 12 and the through hole 5a.

The mesh filter 12 is made by woven a polymer or rustproof metal wire so as to have a predetermined mesh, and one end of the mesh filter 12 is fixed to the outer peripheral surface of the drum 5, The larger the number of windings, the finer the mesh size, so the size of the mesh can be set according to the particle size of the sludge to be filtered.

A shaft 6 is provided on one side of the drum 5 to be supported by bearings through the outside of the casing 2. The shaft 6 is separately connected to a decelerating motor 7 capable of forward and reverse driving, ) Can be rotated independently of each other.

Although the decelerating motor 7 is separately installed in each shaft 6, one driving motor may be connected to a plurality of shafts 6 through a chain or a gear, A torque limiter may be installed in the deceleration motor (7) to protect the motor by shutting off the circuit when foreign objects are caught or overloaded during operation.

An outlet shaft tube 8 is formed on the other shaft of the drum 5 and penetrates to the outside of the casing 2 so as to be supported by bearings. A rotary tube 9 is provided at the end of the outlet shaft tube 8 with a purified water pipe 10, So that the fluid that has firstly been purified by the mesh filter 12 and flows into the filter chamber 3 is discharged to the outside through the discharge shaft tube 8 and the purified water pipe 10.

On the other hand, a washing water supply pipe 15 is horizontally installed below the mesh filter 12 connecting between the two drums 5 for back flushing the contaminated mesh filter 12, A plurality of injection nozzles 16 are provided at regular intervals to inject the washing water upwardly with a strong pressure to remove the sludge adsorbed to the mesh filter 12.

4 is a front sectional view showing the cleaning state of the mesh filter 12. The direction of a part of the nozzles 16 provided in the washing water supply pipe 15 corresponds to the direction in which the drum 5 is located, So that the mesh filter wound around the drum is released as soon as it is released, and the separated sludge does not accumulate on the filter again.

When the mesh filter 12 is closed by filtration of the subsequent wastewater, a pressure difference is generated between the supply pipe 4 into which the wastewater flows and the purified water pipe 10 discharged. When a signal exceeding a preset pressure difference is detected by the pressure gauge, it is displayed on a control screen for controlling the filter device 1 so that the manager can notify the cleaning timing of the mesh filter 12.

FIG. 5 is a front view showing another embodiment of the cassette type filter apparatus provided in the present invention. As shown in FIG. 5, the filtration efficiency can be further improved by constituting the filter chamber 3 in two stages or three stages or more .

That is, a filter chamber 3 into which wastewater flows directly is formed at the uppermost side of the casing 2, an auxiliary filter chamber 3 'is formed below the filter chamber 3, and each filter chamber 3 A drain pipe 11 for discharging the sludge collected by the hopper 2b to the drain tank 40 is installed.

A pair of drums 5 independently driven by a motor are arranged side by side apart from the same horizontal plane in each of the filter chambers 3 and 3 ' A washing water supply pipe 15 for washing is formed.

The size of the mesh of the mesh filter 12 wound around the drum 5 of the auxiliary filter chamber 3 'is smaller than that of the mesh filter 12 disposed in the filter chamber 3, The purified water pipe 10 connected to the discharge shaft tube 8 provided in the upper portion of the auxiliary filter chamber 3 'is connected to the upper portion of the auxiliary filter chamber 3' so that the uppermost filter chamber 3 filters the larger sludge, So that the sludge of fine particles is filtered by the mesh filter 12 in the auxiliary filter chamber 3 '.

Through the filtering process of two or more stages, the filtered purified water is transferred to the purified water tank 30 through the second purified water pipe 14 connected to the drainage pipe 8 formed in the lowermost filter chamber 3 '.

The operation and operation of the sludge filtration apparatus constructed as above will be described with reference to the drawings.

Since the drum 5 is rotated at a low speed by the decelerating motor 7 connected to the shaft, the mesh filter 12 coupled to the outer circumferential surface of the drum 5 can be wound or unwound to one side. The mesh filter 12 has a prescribed mesh size. However, as shown in FIG. 3, the size of the mesh becomes larger in proportion to the number of turns on the outer circumferential surface of the drum 5, so that the size of the mesh can be set according to the particle size of the sludge to be filtered .

The washing of the mesh filter 12 causes the washing water to be adsorbed to the nozzle 16 of the washing water supply pipe 15 while moving the position of the mesh filter 12 by slowly rotating the pair of drums 5 in the same direction at the same time. If the tensile force is applied to both sides of the mesh filter 12 by a method in which the RPM of the one drum 5 is higher than the RPM of the other drum 5 by driving the sludge at a higher speed than the RPM of the other drum 5, The sludge bound between the mesh can be removed more quickly and effectively.

6 is a state diagram showing a configuration of a wastewater treatment system to which the filter device provided in the present invention is applied.

As shown in the figure, a waste water tank 20 is provided to collect wastewater discharged from various uses and to introduce the wastewater into the filter chamber 3 of the filter device 1 by a wastewater pump 21, The large sludge particles are filtered in the mesh filter 12 and the filtered fluid is transferred to the purified water tank 30 through the purified water pipe 10 connected to the discharge shaft pipe 8.

A drain pipe 11 for discharging the sludge settled on the hopper 2b is connected to the lower end of the filter chamber 3 to discharge the sludge to the drain tank 40, The sludges are transferred to a separate sludge treatment unit such as a centrifugal dehydrator.

When the clogging of the mesh filter 12 is detected by the pressure gauge, the fluid stored in the purified water tank 30 is supplied to the washing water supply pipe 15 by driving the washing pump 31, The sludge adsorbed to the mesh filter 12 is desorbed.

The cassette type filter device 1 according to the present invention having the above structure is relatively simple in structure and small in volume so that it is easy to install even in a limited space and the filter particle size is changed according to the number of times the mesh filter 12 is wound on the outer peripheral surface of the drum 5 Easy to control.

The filter device 1 having a single filter chamber 3 can be obtained by forming the two filter chambers 3 and 3 'to have a laminated structure and applying the mesh of the mesh filter 12 provided in each filter chamber differently, It is possible to delay the occlusion time of the mesh filter 12 by more than twice and to shorten the cleaning time of the mesh filter 12 to improve efficiency and reliability of the filtration operation There is an advantage to increase.

While the present invention has been described in connection with what is presently considered to be the most practical embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the scope of protection of the present invention is not limited to the above-described embodiments, but the scope of the claims of the following claims and the scope of protection from these techniques to equivalent technical means should be acknowledged.

The use of the cassette type filter device provided in the present invention can more effectively filter the wastewater sludge at a time when the importance of the environment is emphasized and the level of wastewater treatment water quality is strengthened and advanced treatment is required. Big.

Claims

A casing 2 in which a filter chamber 3 is formed and a supply pipe 4 through which wastewater flows is formed;

A hopper 2b for collecting the sludge settled down to the bottom of the casing 2; And a drain pipe (11) connected to the hopper (2b) for draining the sludge;

A pair of drums (5) having a plurality of through holes (5a) formed on an outer surface thereof and arranged side by side on a same horizontal plane inside the casing (2);

A mesh filter (12) installed such that both ends are wound around the outer peripheral surface of the pair of drums (5) at least once;

A shaft 6 formed at one side of each drum 5, penetrated outside the casing 2 and supported by the bearing, and driven to rotate by the reduction motor 7;

An exhaust shaft tube 8 formed on the other side of the drum 5 for discharging the fluid through the mesh filter 12 to the outside and fixed to the bearing so as to be penetrated to the outside of the casing 2;

A purified water pipe 10 connected to the discharge shaft tube 8 through a rotary joint 9;

And a washing water supply pipe 15 installed horizontally below the mesh filter 12 connecting between the pair of drums 5 and spraying high pressure washing water toward the mesh filter 12. [ A cassette type filter device.
The method according to claim 1,

In the lower portion of the filter chamber 3, one or more auxiliary filter chambers 3 'are further laminated,

In the auxiliary filter chamber 3 ', a pair of drums 5 wound with a mesh filter 12 are installed to rotate by a reduction motor 7,

The purified water pipe 10 of the filter chamber 3 is connected to the upper portion of the auxiliary filter chamber 3 '

Is disposed on the side of one side of the drum 5 provided in the auxiliary filtration chamber 3 'located at the lowermost position for discharging the finally purified fluid to the outside of the filter device 1, A discharge tube 8 to be installed and a second purified water pipe 14 connected thereto are formed,

The size of the mesh of the mesh filter 12 installed in the uppermost filter chamber 3 is formed to be larger than that of the mesh filter 12 disposed in the lowermost auxiliary filter chamber 3 ' Characterized in that the sludge is filtered and the smaller sludge particles are filtered in the auxiliary filter chamber (3 ').
The method according to claim 1,

To collect the filtered fluid, the purified water pipe (10) is connected to a purified water tank (30)

The washing water supply pipe 15 is connected to the purified water tank 30 through the washing pump 31,

The cleaning of the mesh filter 12 is carried out by a cleaning pump 31 which supplies the fluid of the purified water tank 30 to the cleaning water supply pipe 15 to be sprayed through the nozzle 16 provided on the cleaning water supply pipe 15 Characterized in that the cleaning is carried out with washing water.
The method according to claim 1 or 2,

The direction of some of the nozzles 16 provided in the washing water supply pipe 15 is set to be upwardly inclined so as to face the top dead center of the drum 5 so that the sludge is removed immediately after the mesh filter 12 wound on the drum 5 is released. And the cassette-type filter device.