WO2011099656A1

WO2011099656A1 - Downflow high-speed fine filtering apparatus

Info

Publication number: WO2011099656A1
Application number: PCT/KR2010/000830
Authority: WO
Inventors: 전성식
Original assignee: (주)피지티
Priority date: 2010-02-10
Filing date: 2010-02-10
Publication date: 2011-08-18

Abstract

The present invention relates to a downflow high-speed fine filtering apparatus for wastewater, the apparatus comprising a jacket-shaped outer container member (2) defining a space therein for storing water, having a filtering raw water supply pipe (21) formed at one side thereof for supplying filtering raw water from the top of a filtering member (82) configured as a weft, and having a reverse wash water discharge pipe (16) formed on the other side thereof for discharging reverse wash water and air for reverse washing, wherein the downflow high-speed fine filtering apparatus further comprises: a fluid discharge guide plate (26) at the upper portion of the outer container member (2), for guiding the discharge of reverse wash water through a central portion of an inner container member (23) during reverse washing; the inner container member (23) disposed within the outer container member (2) and having the filtering member (82) configured as a weft installed therein; a multifunctional porous plate (24) at a lower portion of the inner container member (23), for performing the functions of discharging filtered water and supplying reverse wash water and air for reverse washing; a multifunctional member (4) in communication with the bottom of the inner container member (23) and having a running-water collector (43) installed therein; a running-water collector main pipe (6) connected to the bottom of the multifunctional member (4), for discharging filtered water; a reverse wash water supply pipe (7) connected to a side of the running-water collector main pipe (6), for supplying reverse wash water; and a reverse washing air supply pipe (9) connected to the other side of the running water collector main pipe (6), for supplying air for reverse washing.

Description

Downflow high speed precision filtration device

The present invention relates to a downflow high-speed precision filtration device, and more specifically, it is possible to treat sewage and purified water in one system, and further, by regenerating the filtration member with only a small amount of backwash water and backwashing air during backwashing. The present invention relates to a downflow high-speed precision filtration device which extends the service life of the product and enables high backwash efficiency.

Typically, water or sewage treatment facilities are equipped with a filtration device to remove particulate suspended solids that are difficult to remove in the final effluent.

The filtration device is provided with a filtration device for filtering particulate suspended solids from raw filtration water, and these filtration devices accumulate particulate suspended solids generated during the filtration process after a certain period of use. Since the filter performance is rapidly deteriorated or lost, it should be cleaned periodically or replaced after a certain period of use.

The filtration principle of the conventional filtration device using the weft yarn as a filtering member is that the filtration occurs in the transverse direction of the length of the weft yarn as the filtration member, so that the length of the weft yarn, which is the filtration member, and the length of the filtration device are too long in order to secure an appropriate layer. There is this.

And the filtration characteristics of the filtration device using the conventional weft as the filtering member is the accumulation of particulate suspended solids in the water removed as the filtration proceeds in the transverse direction of the weft of the filtering member from the lower part of the filtering member and gradually accumulates to the upper part of the filtering member. When it happens, backwashing begins. The backwashing is made in the longitudinal direction (vertical direction) of the weft as the filtration member as the backwashing water and the backwashing air are supplied from the lower part of the filtration device, so that a large amount of backwashing water and the backwashing air are supplied to increase the backwashing efficiency. There is a problem that the power required for backwashing is too high.

In addition, the filtration device using the conventional weft as a filtering member, the amount of backwashing water generated due to a lot of power and frequent backwashing increases and the backwashing efficiency is low, and the filtration by frequent backwashing and exposure of a large amount of backwashing air Due to the shortening of the life of the weft, which is a member, frequent replacement of the filtration member not only increases the maintenance cost but also increases the waste of the filtration member, and may also shorten the life of the filtration device due to vibration during backwashing.

The technical problem of the present invention is to improve the backwashing efficiency of the filtration device and to significantly reduce the required amount of backwashing air and backwashing water required for backwashing, to lower the filtration resistance (filtration pressure) during filtration, and to backwashing during backwashing. It will drastically reduce the amount of air supply and backwash water generated.

Another technical problem of the present invention is to reduce the power required to operate the filtration device and to improve the life and backwashing efficiency of the weft of the filtration member.

Embodiments of the present invention provide a downflow high-speed precision filtration device in which filtration is performed in the longitudinal direction of the weft yarn.

According to the present invention, since the filtration water is uniformly supplied at a constant speed from the upper part of the filtration member made of weft during filtration, the particulate matter in the water accumulates intensively from the upper part of the filtration member. Only the backwashing water and the backwashing air supply easily remove the particulate matter attached to and accumulating on the filtering member and achieve high backwashing efficiency.

As a result, the life of the weft yarn, which is a filtration member, can be increased, and the amount of backwash water to be reprocessed can be reduced, and the life of the filtration device can be extended by reducing vibration generated by the backwash air during backwashing.

In addition, since the filtration is performed in the longitudinal direction of the weft of the filter member (vertical direction of the filtration device) there is an effect that can lower the filtration resistance (filtration pressure) compared to the prior art that the filtration occurs in the transverse direction of the filter member.

As an embodiment of the present invention, as a result of operating a filtration device of 500 tons / day in P sewage treatment plant, SS (Suspended Solid), which is a particulate matter in water, had an inflow average concentration of 9.4 ppm and an average concentration of filtered water was 0.97 ppm. The removal efficiency was 89.7%, and the average inflow of BOD (Biochemical Oxygen Demand), the biological oxygen demand, was 6.8ppm, and the BOD concentration of the filtered water was 2.9ppm, which showed 57.4% removal efficiency.

In addition, the amount of air required for back washing consumed 3NL (3NL / ton) per ton of filtered water and the average amount of backwash water generated was 1.1%.

Further, in the present invention, since the through-hole is formed and the weft of the filtration member is prevented by the fluid discharge guide plate spaced upward by a predetermined distance from the upper end of the inner cylinder member, there is also an effect of more efficient backwashing.

1 is a structural diagram showing the internal structure of the downflow high-speed precision filtration apparatus according to the present invention.

2 is an enlarged view of a portion 'B' in FIG. 1.

Figure 3 is a cross-sectional view showing a 'composite function member' constituting an embodiment of the present invention.

Figure 4 is a structural diagram showing the state of the shrinkage and compression filtration member during the filtration process according to an embodiment of the present invention.

5 is a structural diagram showing a state in which the filtration member is regenerated during the backwashing process according to the embodiment of the present invention.

Figure 6 is a structural diagram showing another embodiment of the downflow high-speed microfiltration apparatus according to the present invention.

Figure 7 is a cross-sectional view showing the configuration of the fluid discharge guide plate constituting the embodiment of the present invention.

The present invention relates to a downflow high-speed precision filtration device, a space in which water is stored is formed inside, an inlet through which raw water flows is formed on one side, and a backwash water discharge pipe for discharging backwash water is formed on the other side, and An outer cylinder member having a filtration member installed on the outer cylinder member; A composite function member connected to a lower portion of the inner cylinder member and having a flowing hole installed therein; A main pipe connected to the lower portion of the composite functional member to discharge filtered water; A backwash water inlet pipe connected to one side of the main co-flowing main pipe and supplying backwash water; It is connected to the other side of the main pipe and comprises a back-flushing air supply pipe for supplying air for back-flushing.

An inner cylinder member having a filtration member inserted therein and an upper opening thereof is installed at an inner lower portion of the outer cylinder member, and a fluid discharge guide plate is installed at an inner upper portion of the outer cylinder member to induce central discharge of the backwash water and communicate with the backwash water discharge pipe. do.

The fluid discharge guide plate is formed on the inner upper portion of the outer cylinder member spaced at a predetermined distance upwardly from the upper end of the inner cylinder member to prevent the tip of the weft yarn.

The inner cylinder member is formed with an inner diameter smaller than the inner diameter of the outer cylinder member, a filtration raw water supply cavity is formed between the inner cylinder member and the outer cylinder member.

The filtering member is composed of a plurality of weft yarns having a predetermined length, the lower end of the weft yarn is made of the composite functional porous plate, the composite functional porous plate is to fix the lower end of the filtering member of the weft The filtration member fixture and a plurality of fluid drains are formed to supply the filtered water discharge and the backwash water supply and the backwash air.

The composite functional member is composed of a flow channel support having flanges installed on the upper and lower ends of an outer circumferential surface, and a flow channel formed on the inside of the flow channel support and formed with a flow opening tool having first and second openings at upper and lower portions thereof. Is made of a funnel shape in which the diameter increases from the second opening to the first opening.

The backwash water supply pipe is installed at an angle of 20 ° to 40 ° with respect to the main pipe of the flowing water.

The outer cylinder member is formed by laminating in vertical multistage.

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

As shown in Fig. 1, the downflow type high-speed precision filtration device A according to the present invention has a space in which water is stored therein, and the raw water is filtered from all directions in the upper part of the filtration member 82 made of a weft thread. Filtration source water supply pipe 21 through which the filtration raw water is supplied is formed on one side of the jacket-shaped outer cylinder member 2 so as to be uniformly supplied, and the other side is formed with a backwash water discharge pipe 22 for discharging the backwash water. An outer cylinder member 2 provided with an inner cylinder member 23 filled with a filtering member 82 formed of a filtration member 82;

A fluid discharge guide plate (26) for inducing a central discharge of backwash water on the outer cylinder member (2);

A composite functional porous plate 24 having a function of planting and filtration water discharge and backwash water supply and backwash air supply to the lower portion of the inner cylinder member 23;

A combined functional member 4 connected to the lower portion of the inner cylinder member 23 and having a flowing hole 43 installed therein;

It is connected to the lower portion of the composite functional member (4) and the main pipe (6) flowing through the drainage water supply and the back washing water supply and back washing air supply is made;

A backwash water supply pipe 7 connected to one side of the main co-flow main pipe 6 and supplying backwash water;

It is connected to the other side of the main flow pipe (6) and consists of a back washing air supply pipe (9) for supplying the back washing air.

Now, the above configuration will be described in more detail.

As shown in FIG. 1, the outer cylinder member 2 is for storing water, and a space in which water is stored is formed therein, and a raw water supply pipe 21 into which raw water is introduced is formed at one side, and the other side is reversed. A backwash water discharge pipe 22 for discharging the washing water is formed, and a fluid discharge guide plate 26 having a hole in the center is formed to communicate with the backwash water discharge pipe 22, and a filtration member 82 is filled in the inner lower part. The inner cylinder member 23 having an upper opening is installed, and is formed at the lower end of the inner cylinder member 23, and is composed of a composite functional porous plate 24 on which a filtration member 82 is planted.

The inner cylinder member 23 is formed with an inner diameter smaller than the inner diameter of the outer cylinder member 2 so that the filtration raw water supply cavity 28 is formed between the inner cylinder member 23 and the outer cylinder member 2, the inner cylinder member 23 Between the composite functional member 4 and the composite functional porous plate 24 having the function of planting and filtration water discharge, backwash water supply and backwash air supply of the filtration member 82 composed of the weft is inserted.

That is, the inner cylinder member 23 is to dualize the filtration tank into the outer cylinder member 2 and the inner cylinder member 23, so that the side down flow type filtration device for supplying the filtration raw water from the side. In this side-type downflow filtration device, once the filtration raw water flows through the filtration raw water supply cavity 28 between the inner cylinder member 23 and the outer cylinder member 2 and moves to the filtration member 82, Since the filtration member 82 can be supplied at a uniform and stable speed, the filtration efficiency can be stabilized.

The fluid discharge guide plate 26 is a phenomenon that the filter member 82 composed of the weft filling the inner cylinder member 23 by the back washing water and the back washing air supply when the back washing water is directed toward the back washing water discharge pipe 22. It is to prevent.

To this end, the fluid discharge guide plate 26 has a through-hole formed in the center thereof to allow the backwash water to be discharged to the backwash water discharge pipe 22. That is, since the backwash water passing through the filtering member 82 may be discharged only through the through hole, the filtering member 82 may be prevented from being directed to any one side.

More specifically, as shown in FIG. 7, the fluid discharge guide plate 26 has the same shape as that of the cross section of the outer cylinder member 2 and the inner cylinder member 23 in order to achieve the object as described above. Although it has a form in which the through-hole 26 'was formed, it does not necessarily need to be formed in a circular shape, What is necessary is just a shape corresponding to the cross section of the outer cylinder member 2 and the inner cylinder member 23. As shown in FIG.

In addition, the fluid discharge guide plate 26 is installed to be spaced apart from the inner cylinder member 23 to a top by a predetermined distance. At this time, since the length of the filtration member 82 is the same as the height of the inner cylinder member 23, the fluid discharge guide plate 26 is eventually spaced apart from the height of the filtration member 82 by a predetermined distance. do.

FIG. 2 is an enlarged view of a portion 'B' in FIG. 1.

As shown in FIG. 2, the filtration member 82 is formed by densifying a plurality of weft yarns having a predetermined length, and the lower end of the filtration member 82 formed of the weft yarn is planted on the composite functional porous plate 24. It is fixed in an upright state.

The filtration member 82 composed of the weft yarn is filled with a suitable density to have a filtration capability, and the material used is not limited if it is a weft yarn having a particulate contaminant adhesion characteristic and a suitable strength required for filtration characteristics.

The composite functional porous plate 24 has a plurality of fluid drains such that the filter member fixture 242 for fixing the lower end of the weft, which is the filtration member 82, and the filtration water discharge and the backwash water supply and the backwash air supply. 240 is formed, a plurality of bolt fastening holes are formed on the outer circumference so as to be coupled to the flange formed on the outer peripheral surface of the lower end of the outer cylinder member 2 and the flange 44 of the composite functional member 4 to be described later.

* Figure 3 is a cross-sectional view showing a 'composite functional member' applied to the downflow-type high-speed precision filtration device of the present invention for supplying filtered water discharge and backwashing raw water and backwashing air.

As shown in FIG. 3, the composite functional member 4 is provided with a flowing tool support 40 provided with flanges 44 on upper and lower outer circumferential surfaces, and installed inside the flowing tool support 40. The first and

second openings

41 and 42 are formed, and in particular, the diameter of the funnel is enlarged from the second opening 42 to the first opening 41.

An elbow 45 communicating with the second opening 42 is installed at the lower portion of the flowing hole 43 and the elbow 45 is connected to the flowing pipe main pipe 6.

Of course, the elbow 45 is only one example of a connection member and may be attached to various types of connection members in place of this.

Referring back to FIG. 1, the flowing hole main pipe 6 is connected to an elbow 45 formed at a lower portion of the flowing hole 43 of the composite functional member 4 and is directed to the side, and at the end thereof, air for backwashing. Supply pipe (9) and backwash water supply pipe (7) is connected, in particular, immediately before the backwashing air supply pipe (9) again branched downward, the end is branched into a tee shape, at one end of the filtered water discharge pipe (12) Is connected, the other end is connected to the initial filtered water discharge pipe (13).

Valves PV-2, PV-3, PV-4, and PV-5 are respectively provided in the filtrate discharge pipe 12, the initial filtrate discharge pipe 13, the backwash air supply pipe 9, and the backwash water supply pipe 7. Is installed.

In addition, the valves PV-1 and PV-6 are also installed in the filtration raw water supply pipe 21 and the backwash water discharge pipe 22.

The backwashing air supply pipe 14 is connected to an air supply not shown.

The backwash water supply pipe (7) is preferably installed so that the backwash water supply is good by the venturi effect when supplying the air for backwashing to have a slope of 20 ° ~ 40 ° with respect to the main pipe (6).

Hereinafter will be described the working relationship of the present invention.

Figure 4 is a view showing a state in which the filtration proceeds by shrinking and compressing the filtration member composed of weft when the filtration process of the present invention,

5 is a view showing a state in which the filtration member composed of the weft is relaxed and regenerated by the backwashing process of the present invention.

Referring to FIG. 4, the filtration process includes an initial filtered water discharge valve (PV-3), a backwash air supply valve (PV-4), a backwash water supply valve (PV-5), and a backwash water discharge valve (PV-6). The filtration member filled with the inner cylinder member 23 through the jacket-like filtration water supply cavity 28 while the filtration water supply valve PV-1 and the filtration water discharge valve PV-2 are opened. 82) is introduced into the upper portion is filtered downward in the longitudinal direction of the filtering member 82, at this time, while the particulate contaminants in the filtration raw water is removed, the filtered water flows through the fluid drain hole 240 of the composite functional porous plate 24 It is moved to the joint port main pipe (6) and is discharged to the filtered water discharge pipe (12)

On the other hand, as the filtration process proceeds as shown in FIG. 4, the filtration member of the filtration member 82 is reduced while being compressed and contracted by the water pressure of the filtration raw water flowing into the filtration member 82. Removal of fine particulate contaminants in water is achieved.

As the filtration time elapses, particulate contaminants in the water accumulate from the upper portion of the filtration member 82, and when the degree of accumulation reaches the lower portion of the filtration member 82, the filtration resistance (filtration pressure) increases, and the amount of filtered water occurs.

Therefore, in this state, the back washing operation is performed for regeneration of the filtration member 82.

The backwash process consists of backwash water supply valve (PV-5) and backwash air with the raw water supply valve (PV-1), the reverse fruit water discharge valve (PV-2) and the initial filtrate discharge valve (PV-3) closed. The supply valve (PV-4) and the backwash water discharge valve (PV-6) are opened.

When the backwashing process is finished and the filtration process is started, the contaminated initial filtrate remaining in the filtering member 82, the flowing water hole 43, and the flowing water main pipe 6 during the back washing process is reversed for a predetermined time (about 20 seconds or less). It is configured to discharge to the wash water discharge pipe. At this time, the filtered water supply valve (PV-1) and the initial filtered water discharge valve (PV-1) with the filtered water discharge valve (PV-2), the backwash air supply valve (PV-4), and the backwash water supply valve (PV-5) closed. PV-3) and backwash water discharge valve (PV-6) are opened.

As soon as the initial filtrate discharge is completed, the process is switched to filtration.

The air supplied from the backwashing air supply pipe (9) and the backwashing water supplied from the backwashing water supply pipe (15) during the process of the backwashing process are combined with the multifunctional porous plate through the main drainage pipe (43) and the main drainage pipe (6). Passing through the fluid flow port 240 formed in the 24, wherein the particulate contaminants accumulated in the filtering member 82 in the low density state formed by the expansion and relaxation of the filtering member 82 is detached to the backwash water discharge pipe 22 Is discharged.

After the backwashing process is performed, the filtration member 82 is restored and regenerated to the initial shape as shown in FIG. 5.

On the other hand, Figure 6 is a view showing a downflow high-speed microfiltration according to another embodiment of the present invention.

As shown in Figure 6, the filtration device according to another embodiment of the present invention, because the height of the unit filtration device is much lower than the filtration device according to the prior art, because the backwash water and the air supply for the backwash is very small, 2a, 2a, 2a, ...) in the laminated form can be significantly reduced the installation area of the filtration device, and can improve the efficiency of the filtration device operation.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be readily apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, all such modifications and modifications being attached It is obvious that the claims belong to the claims.

Claims

An outer cylinder member having a space in which water is stored therein, an inlet through which raw water is introduced, and a backwash water discharge pipe configured to discharge the backwash water on the other side;

An inner cylinder member provided inside the outer cylinder member and filled with a filtration member therein;

A composite function member connected to a lower portion of the inner cylinder member and having a flowing hole installed therein;

A main pipe connected to the lower portion of the composite functional member to discharge filtered water;

A backwash water inlet pipe connected to one side of the main co-flowing main pipe and supplying backwash water;

It is connected to the other side of the main pipe and the downflow high-speed precision filtration device comprising a backwash air supply pipe for supplying the air for backwashing.
The method of claim 1,

An inner cylinder member having a filtration member inserted therein and an upper opening thereof is installed at an inner lower portion of the outer cylinder member, and a fluid discharge guide plate is installed at an inner upper portion of the outer cylinder member to guide central discharge of the backwash water and communicate with the backwash water discharge pipe. Downflow high speed precision filtration device characterized in that.
The downflow type high speed precision of claim 2, wherein the fluid discharge guide plate is formed on an inner upper portion of the outer cylinder member spaced at a predetermined distance upwardly from an upper end of the inner cylinder member to prevent the weft from being pulled out. Filtration device.
The method of claim 2,

Downflow-type high-speed precision filtration device, characterized in that the lower end of the inner cylinder member is installed a composite functional porous plate in which the filtration member is planted.
The method of claim 2,

The inner cylinder member is formed with an inner diameter smaller than the inner diameter of the outer cylinder member, downflow type high-speed precision filtration device characterized in that the filtration raw water supply cavity is formed between the inner cylinder member and the outer cylinder member.
The method of claim 2,

The filtering member is composed of a plurality of weft yarns having a predetermined length, the lower end of the weft yarn is made of the composite functional porous plate,

The composite functional porous plate is a downflow type, characterized in that the filtration member fixture for fixing the lower end of the weft filtration member, and a plurality of fluid inlet is formed so that the filtration water discharge and backwash water supply and backwash air is supplied. High speed microfiltration.
The method of claim 1,

The composite functional member is composed of a flow channel support having flanges installed on the upper and lower ends of an outer circumferential surface, and a flow channel formed in the upper and lower holes and having flow holes formed therein at first and second openings. Downflow-type high-speed precision filtration device, characterized in that the funnel shape is expanded in diameter from the second opening to the first opening.
The method of claim 1,

The backwash water supply pipe is a downflow high-speed precision filtration device, characterized in that installed inclined 20 ° ~ 40 ° with respect to the main pipe of the flowing water.
The method of claim 1,

The outer cylinder member is a downflow high-speed precision filtration device, characterized in that the stacking in a vertical multi-stage.