KR100544829B1 - A loss prevention trough of filtering material - Google Patents

Abstract

The present invention improves the structure of the trough to prevent the loss of media through the trough during the backwashing process, as well as to prevent the loss of filtration performance by preventing the loss of media provides a media loss prevention trough.

The trough of the present invention is fixed to the left and right side walls of the trough by the upper and lower support bars, respectively, to prevent the entry of the media that is raised by the backwashing air and the backwashing water during the backwashing process into the trough. In addition, the flow of the upstream flow back to the filter bed by blocking the flow of backwash air and backwash water rising from the bottom of the filtration tank to the trough side during backwashing on the lower left and right sidewalls. It can be achieved by forming a wing that bypasses.

Filtration tank, media loss prevention, trough

Description

A LOSS PREVENTION TROUGH OF FILTERING MATERIAL}             

1 is a view showing a general filtration tank.

Figure 2 is a cross-sectional view of the filter tank to which the median loss prevention trough of the present invention is applied.

3 is a perspective view of FIG. 2;

<Description of the symbols for the main parts of the drawings>

100: filtration tank 110: air inlet

120: hole block 130: trough

131a and 131b: side walls 133a and 133b: support bars

132a, 132b: media entry barrier 134: hole

135a, 135b: wing 140: media layer

The present invention relates to a trough (Trough) for preventing the loss of filter media in the filter paper, and more particularly relates to a filter medium prevention trough that prevents the filter medium is discharged with the backwash water during the backwash to prevent the filter medium is lost.

In general, a water purification plant (or water source) that receives water from a water supply source and mixes, aggregates, settles, filters, disinfects, and water is collectively subjected to the filtration process as a pre-sterilization step. A general porous block type filtration tank is shown in FIG.

As shown, a plurality of hole blocks 10 are vertically and horizontally fixed to the inner bottom surface of the filtration tank 1, the filter medium support plate 2 is disposed on the upper portion of the hole block 10, the filter sand ( 3) and anthracite 4, etc. are laminated | stacked.

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

When the raw water flows into the upper portion of the filtration tank 1 in the filtration tank 1, the suspension material is mainly purified by passing through the anthracite 4, the filtration sand 3, and the media support plate 2, and the purified water is filtered. Through the hole block 10 is to be discharged to the water purification tank via a drain pipe not shown.

As the filtration is repeated, the filter medium (3) and the anthracite (4) is attached to the filter medium and the filtration of the filter layer is lowered if the filter is washed through the backwash process.

The backwashing process is usually performed by supplying backwashing water together with backwashing air. First, the backwashing air introduced from the air inlet 6 through the nozzle 5 is filtered by the filter sand 3 and the antra in the filtration tank 1. It is raised above the filter bed of the site (4).

At this time, the suspended solids, which are foreign matters attached to the filtration sand 3 and the anthracite 4, fall off due to the micro vibration of bubbles rising upward of the filtration tank 1, and when the backwash water is supplied, the filtration sand 3 and The turbidity separated from the anthracite 4 flows into the trough 8 together with the backwashing water and is discharged to a recovery tank (not shown).

 However, as the filter media and anthracite are discharged through the trough together with the backwash water during the backwashing process, the media loss occurs due to the economic burden on the media replenishment cost and the deterioration of the filtration function due to the media loss. There was a risk of vaginal leakage.

Therefore, the present invention has been made in view of the above, the present invention is to improve the structure of the trough to prevent the loss of the filter medium through the trough during the backwashing process, as well as to prevent the degradation of the filtration performance by preventing the filter medium loss The purpose is to provide a media loss prevention trough.

The media loss prevention trough according to the present invention for achieving the above object, in the trough for discharging the turbidity of the foreign matter with the backwash water during the backwashing process for washing the media, the trough is left and right of the trough It is fixed to the side walls by upper and lower support bars, respectively, and has a media entry prevention wall to prevent the media raised by the back washing air and back washing water from entering the trough during the back washing process. When washing, it blocks the flow of backwash air and backwash water rising from the bottom of the filtration tank to the trough side, allowing the rising media to return to the media layer and having a wing to bypass the upward flow. do.

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

Figure 2 is a cross-sectional view of the filtration tank to which the median loss prevention trough according to the present invention is applied, Figure 3 is a perspective view of the medial loss prevention trough of the present invention.

As shown, the top of the trough 130 for preventing the loss of media of the present invention is bent toward the inside of the trough 130, the top end of the side walls (131a, 131b), the trough 130 The sidewalls 131a and 131b of the upper and lower support bars, 132a and 132b, respectively, for preventing the media raised by the backwashing air and the backwashing water from being introduced into the trough 130, respectively. It is fixed by 133a and 133b.

The media entry prevention walls 132a and 132b are formed in a plate shape and formed higher than the side walls 131a and 131b of the trough 130 in order to prevent the media from being introduced into the trough 130. The top edges of the rough surfaces 130 are bent in the opposite direction to the direction in which the top ends of the side walls 131a and 131b are bent, and the lower ends of the media entry barriers 132a and 132b are respectively troughs 130. ) Is bent downward to the side.

In addition, a plurality of holes 134 are formed in the media insertion barriers 132a and 132b for allowing the media, which is suspended together with backwashing water, to return to the mediator layer 140.

And the lower side walls 131a, 131b of the trough 130 blocks the flow of backwash air and backwash water rising from the lower end of the filtration tank 100 to the trough 130 during backwashing, and the media is again filtered. Wing part 135a to return to the mediator layer 140 and to bypass the upward flow of the bottom of the trough 130 to return to the mediator layer 140 without losing the mediators raised with the backwash water. ) And 135b are formed, respectively, and the lower ends of the wing portions 135a and 135b are bent downward.

In the present invention as described above, in the back washing process for washing the filter medium of the filter tank 100 through the air inlet 110 of the outer wall of the filtration tank 100 through the hole block 120 of the lower collecting device back into the filtration tank 100 The cleaning air is introduced to allow the suspended matter attached to the filter medium and the filter media layer 140 such as anthracite to fall off, and then the backwash water is supplied to float the suspended material separated from the filter media layer 140 to the upper side of the filter tank 100. Do it.

At this time, the backwashing air and the backwash water rising from the lower end of the filtration tank 100 are blocked by the wing portions 135a and 135b of the trough 130 and floated upward along with the backwash water. The filter medium is to be returned to the filter layer 140 primarily, and the backwash water blocked by the flow to the upper side is bypassed.

In addition, the backwash water rising from the lower end of the filtration tank 100 to an area other than the lower end areas of the wing parts 135a and 136b has a height of the media entry prevention walls 132a and 132b as a side wall of the trough 130. As higher than the heights of 131a and 131b, the sidewalls 131a of the mediar anti-entry walls 132a and 132b and the trough 130 through the holes of the mediar anti-entry walls 132a and 132b. After being introduced into the space between the and 131b, the turbidity and the like introduced into the trough 130 and suspended by the backwash water may be discharged through the trough 130.

At this time, the media that rises with the backwashing water is heavier than the suspended turbidity, so that the sidewalls 131a and 131b of the trough 130 are formed through the holes 134 formed in the media input barriers 132a and 132b. ) And the upstream flow by the wing portions 135a and 135b formed below the side walls 131a and 131b of the trough 130 after being introduced into the space between the media and the anti-entry prevention walls 132a and 132b. Along with the wing portions 135a and 135b, the filter layer 140 returns to the filter layer 140 by gravity.

As described above, the present invention allows the raised media to be returned to the mediator layer 140 by backwashing due to the formation of the wing parts 135a and 135b and the medial anti-entry walls 132a and 132b. Outflow of the media through 130 can be prevented.

The present invention is not limited to the above described embodiments, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

As described above, the median loss prevention trough according to the present invention forms a medial anti-entry wall and a wing on the trough so that the raised media can be returned to the media layer again without being discharged through the trough during backwashing. In the washing process, it is possible not only to prevent the loss of the media through the trough, but also to prevent the loss of the filtration performance by preventing the loss of the media, thereby preventing the leakage of turbidity.

In addition, the present invention can contribute to the prevention of activated carbon outflow, especially in the high water treatment plant.

Claims (3)

In the trough for discharging turbidity which is a foreign matter together with the backwash water during the backwashing process for cleaning the filter medium, The trough is fixed to the left and right side walls of the trough by means of upper and lower support bars, respectively, and has a media entry prevention wall to prevent the media raised by the back washing air and back washing water from being introduced into the trough during the back washing process. In addition, on the lower left and right side walls, backwashing air and backwashing water which flows up from the bottom of the filtration tank to the trough side are blocked so that the rising media can return to the mediation layer and bypass the upward flow. A medial loss prevention trough, characterized in that it has a wing to be. The medial prevention trough of claim 1, wherein an upper portion of the medial anti-entry wall is formed higher than a sidewall of the trough. The medial loss prevention trough of claim 1, wherein a plurality of holes are formed in the medial introduction prevention wall.

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