KR102178891B1 - Trough for preventing the loss of media in the upstream and downstream filtration devices - Google Patents

Abstract

The present invention relates to a trough for preventing loss of filter media in an upstream and downstream filtration device, which comprises: a U-shaped main body horizontally installed in a filtration tank to overflow a turbid substance, a foreign substance, with backwashing water during a backwashing process of the filter media and discharge the turbid substance to an outlet; a fixing plate attached to an outer side of left and right side walls of the main body at regular intervals; a filter media prevention wall attached to the fixing plate to prevent overflow of the filter media; and a wing unit attached to a lower portion of left and right side walls to which the fixing plate is attached to be inclined, and preventing a direct rise of the filter media to an upper portion. A long hole unit is formed in the middle of one lower portion of the main body to discharge the filter media overflowed into the trough and sinking to the bottom of the main body to the lower portion, and a water flow guiding hole is formed in a lower inner side of an open outlet side of the main body from which the turbidity is discharged, wherein a blocking unit blocking the discharge of the filter media is provided inclined in the direction opposite to the water flow on one side where the water flow guide hole is formed. In addition, a slope unit for receiving the filter media passing through the long hole unit and recovering the same to the bottom of a filtration tank in a lower part of the main body in which the long hole unit is arranged is provided, and an end of the slope is installed to be spaced apart from an inner wall of the filtration tank. When backwashing the filter media, the filter media capable of flowing into the trough with turbid substance and discharging the same to an exit channel side is collected into the filtration tank by guiding the water flow into the slope unit through the long hole unit and the blocking unit of the trough.

Description

Trough for preventing the loss of media in the upstream and downstream filtration devices}

The present invention relates to a trough for preventing loss of filter media of an upstream and downstream type filtration device, and more particularly, by improving the trough installed on the filter paper, the filter media is effectively returned during backwashing in the filter tank. It relates to a trough for preventing loss of filter media of an upstream and downstream type filtration device so as to improve the filtering ability of the filter paper as well as the cleaning effect of the filter media by making it possible to prevent as much as possible.

In general, a filtration process is performed as a pre-disinfection step at a water purification plant (or water source) that receives water from a water source and collectively performs processes such as mixing → coagulation → sedimentation → filtration → sterilization and water supply.

That is, filtration for water purification treatment consists of sieving, sedimentation, blocking or blocking, and removing the suspension through adhesion or coagulation of the filter material (filter material) surface.

Therefore, a lot of suspensions (Floc) are attached to the surface of the filter media. In order to achieve this filtration action stably and continuously, washing of the filter paper to increase filtration efficiency is essential.

Washing of filter papers is usually done by a combination of backwashing and surface cleaning. In other words, backwashing (offensive) separating trapped flocs while expanding the filter layer by supplying purified water in the reverse direction from the bottom of the filter layer, and surface washing (washing) that strongly sprays water through a nozzle on the surface of the filter layer. This proceeds independently or in combination.

Attached Figure 1 shows a general perforated block type filtration tank 1 for performing a filtration process in general. A plurality of perforated blocks 10 are arranged vertically and horizontally on the inner bottom of the filtration tank 1 and fixed, A filter material support plate 2 is disposed on the top of (10), and a filter material such as filter yarn 3 and anthracite 4 is laminated thereon.

In addition, a plurality of nozzles 5 are installed on one lower side of the filtration tank 1, and an air inlet 6 and a drain port 7 are fixed to the outside of the main wall, and a trough at the top of the filtration tank 1 (8) is installed.

When raw water flows from the top of the filtration tank 1 in this filtration tank 1, it passes through the anthracite 4, the filter sand 3 and the filter media support plate 2, and the suspended material is mainly removed to purify the water. It is discharged to the water purification tank through the perforated block 10 through a drain pipe (not shown).

As the filtration operation is repeated, when the filter media such as the filter sand 3 and the anthracite 4 are attached to the filter media and the filtering power of the filter layer decreases, the filter media is washed through a backwash process.

The backwashing process is usually performed by supplying backwashing water together with backwashing air. First, backwashing air flowing in from the air inlet 6 through the nozzle 5 is transferred to the filter thread 3 and anthra in the filter tank 1. It rises above the filtration bed of the site 4.

At this time, the turbidity, which is a foreign substance adhering to the filter sand 3 and the anthracite 4, falls due to the microscopic vibration of the bubbles rising to the upper side of the filter tank 1, and then, when backwashing water is supplied, the filter sand 3 and the The turbidity dropped from the anthracite 4 flows into the trough 8 together with the backwash water and is discharged to a recovery tank (not shown).

However, in such a backwashing process, filter media such as filter sand and anthracite are discharged through the trough along with the backwash water, resulting in loss of filter media, resulting in economic burden on the cost of replenishment of the filter media and a decrease in the filtering function due to the loss of filter media. There was a risk of a vaginal leak.

In order to solve the above, the trough-related crew technology for preventing the loss of filter media is Korean Patent Registration No. 10-0544829 (Name: Filter material loss prevention trough, date of announcement: February 2, 2006, hereinafter referred to as'Patent Document ') is disclosed.

The patent document is fixedly installed by upper and lower support bars 133a and 133b on the left and right side walls 131a and 131b of the trough 130 as shown in FIGS. 2 and 3. In the washing process, backwashing air and filter media raised by the backwashing water are prevented from being introduced into the trough 130, while backwashing at the lower left and right side walls of the filter material inlet prevention walls 132a and 132b. Blocking the flow of backwash air and backwash water rising from the bottom of the filtration tank 100 toward the trough 130 so that the rising filter material can return to the filter material layer 140 and bypass the upward flow. The wing portions 135a, 135b are provided.

In addition, the filter material intrusion prevention walls 132a and 132b have upper ends higher than the side walls 131a and 131b of the trough 130, and the media intrusion prevention walls 132a and 132b A number of holes 134 are formed in the.

The patent document constituted as described above is the filter tank 100 through the perforated block 120 of the lower collecting device from the air inlet 110 outside the main wall of the filter tank 100 during a backwash process for washing the filter medium in the filter tank 100. ) Backwashing air is introduced into the filter so that the turbidity adhering to the filter media layer 140 such as the filter yarn and anthracite can be dropped, and backwashing water is then supplied to remove the turbidity away from the filter media layer 140 in the filter tank 100. By allowing the filter material to float upwards and to return to the filter material layer without being discharged through the trough when backwashing, as well as preventing the loss of filter media through the trough during the backwashing process. It is possible to prevent the degradation of filtration performance.

However, in the above-described type of backwashing process, it is difficult to meet conditions for removing turbidity and preventing loss of filter media.

This is because the turbidity suspended in the uppermost layer in the filter tank during backwashing is finally overflowed with the backwashing water to the top of the opened trough, so that the filter media included in the backwashing water during aeration are vertically spaced from both sides of the trough. While colliding with the provided filter material intrusion prevention wall, it passes through a number of holes and is guided to the lower part of the inclined wing installed under the filter layer and returns to the filtration layer, but a significant amount of the filter material is suspended between the trough and the filter material intrusion prevention wall. There is a problem that a considerable amount of filter media is lost because it overflows along the opened upper portion of the trough.

As described above, in order to smoothly overflow the turbidity into the trough, the air pressure must act largely during backwashing. Here, a significant amount of the filter material is also overflowed into the trough and is discharged along with the turbidity, so it is difficult to manage the loss of a considerable amount of filter material. This point has been pointed out a problem that the filtration capacity of the filter paper is lowered.

For example, if the air pressure in the filter tank is lowered to prevent loss of the filter medium and the backwash process is executed, it takes a long time to remove the turbidity and the supply of backwashing water as well as the separation time of the floc (turbid substance) from the filter medium. Because it is lengthened or not properly separated, the backwashing of the filter material takes a long time and is inefficient.

Therefore, it is necessary to prevent the loss of the filter material as much as possible while removing and discharging contaminated turbid matter from the filter material smoothly.

The present invention was invented to solve the conventional problems as described above, and the filter medium is effectively returned during backwashing in the filter tank to prevent loss of the filter medium as much as possible. The purpose of this is to provide a trough for preventing loss of filter media of an upstream and downstream type filtration device so as to improve filtration capacity.

According to the present invention for achieving the above object, in the backwashing process of the filter medium, a ∪-shaped body installed transversely in the filtration tank so as to overflow the turbid substance, which is a foreign substance, along with the backwash water and discharged to the outlet side, and outside the left and right side walls of the body. It is formed by having a fixed plate attached at equal intervals, a filter material prevention wall attached to the fixed plate to prevent overflow of the filter material, and a wing part that is obliquely attached to the lower side of the left and right side walls to which the fixed plate is attached to prevent the direct rise of the filter material to the top. In the trough for preventing loss of filter media of a downstream filtration device,

A long hole is formed in the middle of the lower middle of one side of the body to discharge the filter material that is overflowed into the trough and sinks to the bottom of the body, while a water flow inducing hole is formed in the lower inner side of the opened outlet side of the body from which the turbidity is discharged. In addition, a blocking part that blocks the discharge of the filter medium is provided on one side where the water flow induction hole is formed, and is provided inclined in the direction opposite to the water flow, and the filter material that has passed through the long hole is received and recovered to the bottom of the filtration tank. A slope portion is provided, and an end of the slope portion is installed to be spaced apart from the inner wall of the filtration tank.

The slope portion according to the present invention is characterized in that it has a cross section in a ∪ shape, the upper end is welded to the body, and one side is formed to be inclined downward in a direction opposite to the internal water flow of the trough.

The wing portion according to the present invention is characterized in that the air discharge pipe for discharging upwardly collected air during the backwashing process is provided to pass through at equal intervals.

The lower portions of the filter media prevention walls located on the left and right sides by the fixing plate from the side walls of the trough according to the present invention are each inclined toward the side wall direction of the trough so that the media is guided to the inclined upper surface of the wing portion attached to the side wall of the trough. It is characterized by being bent formed.

The trough for preventing the loss of filter media of the upstream and downstream filtration device according to the present invention, when backwashing the filter media, flows into the trough along with the turbidity and can be discharged as it is to the drainage channel. By inducing the flow of water to the slope and collecting it inside the filtration tank, the filtration efficiency is improved and the uneconomical loss caused by the loss of filter media can be reduced.

1 is a perspective view showing a general filtration tank,
2 is a cross-sectional view showing the inside of a filtration tank to which a conventional trough is applied,
3 is a perspective view showing an excerpt of a trough according to the prior art;
Figure 4 is a perspective view showing the present inventor trough,
Figure 5 is a side cross-sectional view showing by cutting the trough according to the present invention,
6 is a cross-sectional view showing a state in which the trough according to the present invention is applied in a filtration tank;
7 is an enlarged view showing the trough in FIG. 6;
Figure 8 is a side cross-sectional view showing the return state of the filter material in the trough according to the present invention.

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

Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention. It should be understood that there may be various equivalents and variations.

The trough according to the present invention will be described below with reference to FIGS. 4 to 8.

During the backwashing process of the filter media, a ∪-shaped main body 21 installed laterally in the filtration tank 1 so that the foreign matter, which is a foreign matter, is overflowed together with the backwash water and discharged to the outlet side 21a, and the left and right side walls 21b of the main body The fixing plate 22 attached to the outside at equal intervals, the filter material prevention wall 24 attached to the fixing plate to prevent overflow of the filter material, and the upper side by being obliquely attached to the bottom of the left and right side walls 21b to which the fixing plate 22 is attached. In the known filter material loss prevention trough 200 provided with a wing portion 26 for preventing the direct rise of the furnace media,

An elongated hole 21c is formed in the middle of the lower portion of one side of the main body 21 for discharging the filter medium flowing into the trough 200 and sinking to the bottom of the main body 21.

The long hole portion (21c) is formed by a punching operation to a size that allows a filter material such as filter yarn or anthracite to pass sufficiently smoothly.

A water flow induction hole 21d is formed on one side of the long hole 21c, that is, an inner lower side of the opened discharge port 21a side of the main body 21 through which turbidity is discharged during backwashing.

On one side of the water flow inducing hole 21d, a blocking portion 21e for blocking the discharge of the filter medium is provided to be inclined in a direction opposite to the water flow.

The blocking portion (21e) is a plate that is provided obliquely on the passage passing through the outlet (21a) of the main body (21), in the outlet (21a), in a range that does not affect the suspended quality of the suspended turbidity as much as possible. It is formed to be inclined to a height so that the flow of water passing through the lower side of the discharge port flows into the water flow guide hole 21d.

The water flow induction hole (21d) is formed larger than one long hole (21c), which is the backwashing water along the water flow induction hole (21d) from the outlet (21a) side of the trough 200, the blocking part (21e) It is to be guided by and guided into the inside of the slope part 21f, which will be described later, and discharged through the slope part 21f to the side of the filtration tank 1 so that the discharge of the filter medium in the slope part 21f can be recovered to the filtration tank. to be.

On the other hand, the slope portion (21f) is to form a passage for recovering the filter material to the bottom of the filter tank (1) by receiving the filter material passing through the long hole portion at the bottom of the main body 21 in which the long hole portion (21c) is arranged, Here, the end of the slope portion 21f that is inclined downward is installed to be spaced apart from the inner wall of the filtration tank 1.

The slope portion (21f) has a cross-section in a ∪ shape, the upper end is welded to the bottom of the body (21) and attached, and one side is formed to be inclined downward in the direction opposite to the water flow of the trough (200).

On the other hand, the wing portion 26 is provided with an air discharge pipe 28 for discharging upwardly collected air during the backwashing process to penetrate at equal intervals. When backwashing the filter media by offensive (air cleaning), the air collected on the bottom of the wing part 26 is discharged to the outside, while the turbidity is separated by efficient vortex formation at the bottom of the wing part, and the filter media is moved to the bottom side of the filter tank 1. It is to induce.

In the trough 200 having the structure as described above, the lower portion of the filter media prevention wall 24 positioned on the left and right sides by the fixing plate 22 from the side wall 21b of the trough 200, the trough 200 ) Is formed bent inclined toward the side wall (21b) direction of the trough 200 so that the media is guided to the inclined upper surface of the wing portion 26 attached to the side wall (21b) of. That is, the filter material introduced between the main body 21 and the filter material preventing wall 24 is divided by the fixing plate 22 divided from the main body 21, and the bent part of the filter material preventing wall causes the filter material to sink. It is to concentrate on the upper surface of the wing to make it sink.

In the drawings, unexplained reference numeral 21g denotes a support rod connecting the side walls of the main body to prevent deformation of the trough, and reference numeral 12 denotes an ordinary perforated block installed on the bottom of the filter tank.

The trough 200 for preventing filter material loss according to the present invention configured as described above is manufactured by bending a plate material made of stainless steel material without corrosion, and fastening and welding a bolt and a nut to the trough 200 on the inner upper part of the filtration tank 1. ) Of the outlet (21a) is installed laterally to communicate with a separate discharge channel side. The opposite side of the trough 200 is fixedly installed on the inner wall of the filtration tank 1, and each trough is installed from the filtration tank toward the discharge channel.

A plurality of troughs 200 having the above structure are constructed horizontally in the filtration tank 1 and are stacked on the filter media on the bottom side of the filtration tank 1 and on the perforated block 12 to filter water, For filtration performance, a backwashing operation is carried out in which the suspended solids are suspended by removing the flocks adhered to the inside of the filtration tank and on the surface of the filter media.

During the backwashing of the filter media, the filter media are relaxed and aerated, and then the flocs attached to the surface are peeled off and floated together with the media to the level at which the top of the trough 200 is located. It overflows the opened upper part of the trough, is collected into the trough, flows toward the outlet, and is discharged together with backwash water toward the drainage passage (not shown in the drawing).

During the backwashing process as described above, the filter material having a lower specific gravity than water is also overflowed into the trough, and the overflowed filter material sinks into the body 21 of the trough 200, and the turbidity is suspended from the backwashing water. Discharge treatment takes place through a drainage channel as a flow.

Here, the media to be settled in the main body 21 fall to the lower side through the long hole 21c formed in the middle of the main body 21 and sink to the inclined floor inside the slope part 21f. Even if some of the filter media are between the long hole portions 21c, since the water flow is discharged in the direction of the drainage passage along the inside of the trough 200, the filter material remaining as a natural water induction flow is transferred to the long hole portion 21c. It falls and sinks.

As described above, as the turbidity floats to the uppermost layer and smoothly flows into the body 21 of the trough 200, the filter material is also overflowed, and the turbidity is naturally discharged to the drainage passage as a flow of backwash water by the water flow.

At this time, the backwash water flowing from the bottom side of the ∪-shaped body 21 by the blocking portion 21e inclined in the reverse direction at a position close to the outlet 21a side of the main body 21 rapidly passes through the water flow induction hole 21d. In addition to passing through, the filter media existing inside the slope part 21f together with the backwash water through the long hole part 21c are pushed in the opposite direction from which water is discharged, and the inside of the filter tank 1 through the inclined slope part 21f By recovering the filter material again, the loss of the filter material can be prevented as much as possible.

In the wing portion 26 that is obliquely attached to the lower side of the main body 21 during backwashing as described above, the filter material interferes at the bottom of the wing portion as much as possible and prevents the filter material from floating to the opened upper portion of the trough 200 as it is. The filter material that has overflowed the filter material prevention wall 24 installed on the upper part of the wing part 26 is guided to the upper part of the wing part 26 along the inclined lower part of the filter material prevention wall 24, so that the filter material is maximized in the trough body ( 21) is delayed as much as possible, and even if the filter materials are overflowed with turbidity, as described above, through the long hole part 21c, the blocking part 21e, and the slope part 21f of the trough 200 as described above. Since it is recovered in the filter tank 1, it is possible to prevent the loss of a significant amount of filter media unlike the conventional trough.

Eventually, the efficient removal of the turbid matter separated from the filter media and suspended to the top layer is that a significant amount of the filter material overflows with the turbidity into the trough, but in the present invention, the overflowing filter material with the rapid induction removal of the turbidity is the lower part of the trough and the slope. As an effect of being reversely recovered, the simultaneous backwashing process of offensive and water washing is possible in that the prevention of loss of filter media can be minimized, providing the advantage of improving the filtration performance of the filtration tank and reducing the cost of loss due to filter media management. .

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , If a person of ordinary skill in the field to which the present invention belongs, various modifications and variations are possible from these descriptions.

Therefore, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things that are equivalent or equivalent to the claims as well as the claims to be described later belong to the scope of the invention. .

1: filtration tank 12: perforated block
21: main body 21a: outlet
21b: side wall 21c: long hole
21d: water flow guiding hole 21e: blocking part
21f: slope part 21g: support rod
22: fixing plate 24: filter media barrier
26: wing part 28: air exhaust pipe
200: trough

Claims (4)

During the backwashing process of the filter media, a ∪-shaped body 21 installed laterally in the filtration tank 1 so that the foreign matter, which is a foreign substance, is overflowed together with the backwashing water and discharged to the outlet side 21a, and the left and right side walls 21b of the body The fixing plate 22 attached to the outside at equal intervals, the filter material prevention wall 24 attached to the fixing plate to prevent overflow of the filter material, and the upper side by being obliquely attached to the bottom of the left and right side walls 21b to which the fixing plate 22 is attached. In the trough 200 for preventing loss of filter media, provided with a wing part 26 to prevent the direct rise of the media to the furnace,
In the middle of the lower middle of one side of the main body 21, a long hole 21c for discharging the filter material that is overflowing into the trough 200 and sinking to the bottom of the main body is formed, while the turbidity of the main body 21 is discharged. A water flow guide hole (21d) is formed in the lower inner side of the opened discharge port (21a), and a blocking part (21e) that blocks the discharge of the filter material is provided inclined in the direction opposite to the water flow at one side where the water flow guide hole (21d) is formed. , At the bottom of the main body 21 in which the long hole portions 21c are arranged, a slope portion 21f for receiving the filter medium passing through the long hole portion and recovering the filter medium to the bottom of the filtration tank 1 is provided, and the slope portion 21f The end of the trough for preventing loss of filter media of the upstream and downstream filtration apparatus, characterized in that installed to be spaced apart from the inner wall of the filtration tank (1).
The method of claim 1,
The slope portion (21f) has a cross section in a ∪ shape, the upper end is welded to and attached to the bottom of the main body (21), and one side is formed to be inclined downward in a direction opposite to the internal water flow of the trough (200). Trough for preventing loss of filter media in downstream filtration devices.
The method of claim 1,
The trough for preventing the loss of filter media of the upstream and downstream filtration apparatus, characterized in that the wing portion 26 is provided with an air discharge pipe 28 for discharging upwardly collected air during the backwashing process.
The method of claim 1,
The lower portion of the filter media prevention wall 24 located on the left and right sides by the fixing plate 22 from the side wall 21b of the trough 200, the wing portion 26 attached to the side wall 21b of the trough 200 Trough for preventing loss of filter media of an upstream and downstream filtration device, characterized in that the media is bent in an inclined direction toward the side wall (21b) direction of the trough 200 so that the media is guided to the inclined upper surface of.

Images