JPH06198276A - Air distribution device for active carbon adsorption equipment - Google Patents

Abstract

PURPOSE:To distribute uniformly air for cleaning in a good manner and make the height dimension of a device small by composing a device of an air pipe half with air vents, an air square pipe and an active carbon support base with holes or slits subdividing foams. CONSTITUTION:An air distribution device 1 for active carbon adsorption equipment is composed of an air piping half 30 with air vents 31 opened on the side face of a half-split pipe, an air square pipe 20 with air intake holes 22 opened on the air pipe half and receiving foams from air vents 31 opened on the bottom and a plurality of air vents 23 opened on the side wall, a plurality of holes 14 and 17 or slits opened for subdividing foams discharged out of the air vents 23 and an active carbon support base 10 for supporting the active carbon. The air for cleaning supplied to the air pipe half 30 is distributed primarily in the air pipe half 30, distributed secondarily in the air square pipe 20, distributed tertiarily on a lower porous plate 15 of the active carbon support base 10 and distributed quarternarily on an upper porous plate 18 to be decomposed uniformly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air distribution device suitable for activated carbon adsorption equipment for water purification plants and anthracite (anthracite having a specific gravity of 1.4 to 1.6) and multi-layer filtration equipment for sand.

[0002]

2. Description of the Related Art FIG. 12 is a partial sectional view of a conventional granular activated carbon adsorbing facility in a water purification plant. The activated carbon adsorbing facility 100 is a perforated plate 101 on which gravel 102 and activated carbon 103 are packed. . The raw water poured from above is purified by the activated carbon 103 while flowing downward. The treated water passes through the gravel 102 and the perforated plate 101, and the water collecting chamber 10 below.
4 is extracted.

The adsorbed substance contained in the raw water is activated carbon 103.
The adsorption capacity of the activated carbon 103 is gradually reduced by being adsorbed by the. Therefore, water containing air is collected in the water collection chamber 104 in the figure.
The perforated plate 101, the gravel 102, and the activated carbon 103 are flowed in this order to clean the dirty activated carbon 103.

When the speed of water is increased in order to enhance the cleaning action, the activated carbon 103, anthracite and the like having a small specific gravity are blown up, so the speed cannot be increased too much. Therefore,
Although air is added, the air exerts a large shearing force between the particles of the granular activated carbon and has a greater cleaning effect than water cleaning alone.

FIG. 13 is a perspective view showing a conventional cleaning device for an activated carbon adsorption facility, and FIG. 14 is a partial sectional view thereof. As shown in FIG. 14, the activated carbon filtration tank 110 has bottoms 111 to 50.
The support beam 112 is passed upward by about 0 mm, and the support beam 11
2. Place an inverted U-shaped air dispersion pipe 113 on the top of 2, and put a perforated concrete plate 114 on the air dispersion pipe 113,
Gravel 115 is placed on this concrete plate 114, and activated carbon 11 is placed on it through a porous concrete layer 116.
7 is piled up. A large number of air holes 113a, 113a are formed in the left and right side walls of the air dispersion pipe 113. FIG. 13 shows these configurations in three dimensions.

In FIG. 13, when cleaning the activated carbon, air is blown into the air chamber 118 at the back. This air is diverted to the air dispersion pipe 113 and blown out from the plurality of air holes 113a of the air dispersion pipe 113. On the other hand, outside the air dispersion pipe 113, washing water is caused to flow upward, and the air is mixed with the washing water to wash the activated carbon 117, and the filtration tank 110 is washed.
Is discharged to the outside.

FIG. 15 is a sectional view of a conventional activated carbon adsorption facility equipped with a strainer type air distribution device, and FIG. 16 is an enlarged view of the strainer. As shown in FIG. 16, the strainer 12
0 is a lower pipe 1 in which a plurality of orifices 121 are opened
Upper dome 1 with 22 and a plurality of slits 123
24 and is embedded in the intermediate floor 126 (corresponding to the perforated concrete plate 114 in FIG. 14) as shown. During cleaning, air is accumulated below the intermediate floor 126, and this air passes through the orifice 121 and reaches the inside of the lower pipe 122. On the other hand, the wash water 130 below the air reservoir passes through the lower pipe 122 and rises. At this time, the air from the orifice 121 is taken in, and the air is mixed with the air from the upper slit 123 and jetted upward in the state of water. As a whole, air is blown into the upper part of the water collecting chamber 127 from the air blowing port 132 shown in the lower center of FIG. 15, and washing water is flowing into the water collecting chamber 127 from the washing water blowing port 133 as shown by the arrow. Be blown in.

[0008]

In the activated carbon filter tank 110 shown in FIG. 14, the quality of air dispersion is determined by the pitch of the air holes 113a of the air dispersion pipe 113. Air dispersion pipe 113
Since it is difficult to open the air holes 113a too densely, it is necessary to re-disperse them with the upper gravel 115, and the height becomes large as a whole, so that even distribution cannot be expected.

In the case of using the strainer 120 shown in FIG. 16, the cleaning water is ejected from the upper dome 124 in an inverted conical shape, so that the periphery of the upper dome 124 becomes a so-called dead space and the activated carbon is not cleaned. Furthermore, the old activated carbon is pulled out to replace the activated carbon,
Since the upper dome 124 projects from the intermediate floor 126, the activated carbon cannot be pulled out smoothly, which is unsatisfactory.
Therefore, an object of the present invention is to provide an air distribution device for an activated carbon adsorption facility, which allows air to be evenly dispersed, has a low height, and has a simple structure.

[0010]

In order to achieve the above object, the present invention is directed to an air pipe half in which air holes are formed on the side surface of a half-split pipe, and an air intake hole for receiving air bubbles from the air hole. Square pipe for air with a plurality of air holes opened in the side wall, and a plurality of holes or slits for subdividing the bubbles discharged from the air holes of the square pipe for air are formed, and the activated carbon supporting the activated carbon is formed. An air distribution device for an activated carbon adsorption facility consisting of a support bed is constructed. These air pipe halves, air square pipes, and activated carbon support beds are made of fiber reinforced plastic, and are connected to each other only by bolts.

The activated carbon support bed has a lattice frame formed by assembling horizontal rails and vertical rails in a lattice, a lower porous plate placed on the lattice frame and having a plurality of holes, and a lower porous plate of the lower porous plate. 1 for hole
/ 2 consisting of an upper perforated plate with a plurality of holes at a shifted position, and a spacer sheet sandwiched between the lower perforated plate and the upper perforated plate to secure a certain gap in the height direction Or, it is formed into a shape that can enclose the lower frame with a saw-plate-shaped lower frame in which slits with a constant gap are opened at equal intervals, and the lower frame is one size larger than the lower frame. It is composed of an upper frame having slits formed therein, and a spacer sheet sandwiched between the lower frame and the upper frame to secure a gap in the height direction of a certain size.

It is preferable that the pipe half for air is fixed to the floor of the water collecting chamber, the square pipe for air is supported on the floor of the water collecting chamber through the support beam, and a water passage hole is formed in the support beam.

[0013]

[Function] The cleaning air supplied to the air pipe half is firstly distributed by the air pipe half, secondly distributed by the air square pipe, thirdly distributed by the lower perforated plate, and fourthly distributed by the upper perforated plate. It will be distributed evenly.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals.
FIG. 1 is a sectional view of an air distribution device for activated carbon adsorption equipment of the present invention, FIG. 2 is an exploded perspective view of an air distribution device for activated carbon adsorption equipment of the present invention, and FIG. 3 is an exploded view of an activated carbon support bed of the present invention.

For ease of explanation, FIGS. 3, 2 and 1
In order. In FIG. 3, the activated carbon support floor 10 is attached to a lattice frame 11 (a horizontal rail 12 and a vertical rail 13 are fitted together) having a structure similar to a shoji rail, and a 3 mm FRP (fiber reinforced plastic) plate with a 30 mm rail. Lower perforated plate 15 in which holes 14 are densely formed at a pitch of 48 mm, spacer sheet 16 of 0.3 mm, and upper porous plate 18 in which holes 17 of 30 mm are densely formed in a 14 mm FRP plate. And is laminated. It should be noted that the diameters and pitches and arrangements of the holes 14 and 17 (square, zigzag) and the thickness of the spacer sheet 16 are specific examples and are not limited to these. The spacer sheet 16 may be in the form of a lattice as shown in the drawing, or may be in the form of a simple strip, and the point is that the spacer sheet is only required to ensure a certain gap. The lattice frame 11 is also made of FRP,
Grooves 11a for receiving the fixing bolts 19 are formed at the four corners.

FIG. 2 is an exploded view of the air distribution device 1 for activated carbon adsorption equipment. The air distribution device 1 for activated carbon adsorption equipment (hereinafter, simply referred to as "air distribution device 1") is a pipe half for air from the bottom. 30, the square pipe 20 for air, and the activated carbon support floor 10 are laminated. Square pipe 20 for air is also FR
If the lattice frame 11 is made of P and the grid frame 11 is 1 m square, a plurality of them are arranged in parallel at a pitch of 1 m or a pitch equally dividing 1 m. The square pipe 20 for air has air intake holes 22, 22 at the bottom 21.
Further, air holes 23 are opened in the upper portions of the left and right side walls at a predetermined pitch. An air hole 31 of the air pipe half 30 is formed below the air intake hole 22. Air pipe half 30 is FRP angle 33
The angle 33 is bolted to the upper part of the water collecting chamber 35.

As shown in FIG. 1, the air distributor 1 includes an air pipe half 30 and an air square pipe 2 from the bottom as described above.
0, activated carbon support floor 10 is laminated, activated carbon support floor 1
0 holes 14 of the lower perforated plate 15 and holes 17 of the upper perforated plate 18 are 1
It is characterized in that it is shifted by / 2 pitch.

FIG. 4 is an explanatory view of the mounting of the activated carbon support floor of the present invention, in which the long nut 37 is previously provided on the upper surface of the air angle pipe 20.
And the lower bolt 38 is screwed in from inside the square pipe 20. The lower bolt 38 may be pressed and the long nut 37 may be twisted. These long nuts 37 are attached to the lattice frame 11
The upper and lower perforated plates 15 and 18 are fixed together with the space sheet 16 with fixing bolts 19 by fitting the grooves 11a at the corners of. The above-mentioned components are basically made of FRP and are characterized in that they can be assembled with only bolts.

The operation of the air distributor having the above construction will be described below. FIG. 5 is an explanatory view of the operation of the air distributor of the present invention, in which air is blown from the air blowing port 40 at the back of the water collecting chamber 35, and the air pool 41 of the air pipe half 30 is generated. On the other hand, the wash water is blown into the water collecting chamber 35 from the wash water blowing port 42, and the wash water rises as indicated by the arrow.

Air holes 31, 3 of the air pipe half 30
The air from 1 rises as bubbles and rises, and the air intake hole 2
After passing through 2, 22, enter the square pipe 20. An air pool 24 is also generated in the upper part of the square pipe 20 by this air, and further this air goes out from a plurality of air holes 23 of the square pipe 20 and rises as indicated by the arrow. The innumerable bubbles are the lower porous plate 1
5, while passing through the plurality of holes 14 of the No. 5, the gap by the spacer sheet 16 and the plurality of holes 17 of the upper porous plate 18 in order,
Further, it is crushed and distributed, and rises in the activated carbon 44. As described above, the present invention provides the pipe half 30 for air
The air is evenly supplied to the activated carbon 44 by the secondary distribution, the secondary distribution by the square pipe 20, the tertiary distribution by the lower porous plate 15, and the fourth distribution by the upper porous plate 18.

FIGS. 6 (a) and 6 (b) are views of another embodiment of the activated carbon support bed of the present invention. In FIG. 6 (a), the activated carbon support bed 50 is a sludge plate having relatively large slits 51 formed therein. -Shaped lower frame 52, a spacer sheet 54 having a thickness of 0.3 mm mounted on the crosspiece 53 of the lower frame 52, and the lower frame 52
It is composed of an upper frame 56 which is larger in size and has a slit 55 of a smaller width, and the upper frame 56 is a lower frame 52.
It has a structure that can be completely covered. Therefore, as shown in FIG. 6B, by fitting the upper frame 56 to the lower frame 52 via the spacer sheet 54, these can be integrated and handled easily.

FIG. 7 is a diagram showing another embodiment of the combination of the air pipe half and the air square pipe of the present invention, and shows an example in which the water collecting chamber 35 in the form of one step down in FIG. 1 can be eliminated. . Basically, a part of the square pipe 20 is cut out, and the upper part of the air pipe half 30 is fitted therein, and the height dimension is extremely small. 57 is an angle for fixing the air pipe half 30 to the floor. 58
Is a support beam having a water passage hole 59 and supports the square pipe 20. That is, a portion of the support beam 58 which is in contact with the height of the support beam 58 serves as a water collecting chamber 60, and water flowing in the left-right direction of the drawing passes through the water passage hole 59. The air blown from the air blowing port 40 exits from the air holes 31 and 31 and rises, and enters the square pipe 20 through the air intake holes 22 and 22 of the square pipe 20. Since the subsequent steps are the same as those in FIG. Further, in FIG. 7, the activated carbon support beds 10 and 50 are omitted.

8 to 11 are views showing another embodiment of a large-sized air distribution device for central drainage grit-adsorption part left / right distribution according to the present invention. FIG. 8 is a sectional view of the air distribution device and FIG. 9 is a plan view thereof. Therefore, the air distribution device 70 does not include an air pipe half. That is, the air distribution device 70 includes a plurality of water conduits 71 that are horizontally opened on the side wall of the water collection chamber 35, a large diameter portion 72 provided at the outlet of these water conduits 71, and the large diameter portion 7.
The square pipes 20 facing each other, the channel steels 73 and 73 connecting both ends of the square pipes 20, and the sealing material 75 such as mortar. 25 is a water passage hole.

FIG. 10 is a sectional view taken along the line 10-10 of FIG. 8 and shows the connection between the large diameter portion 72 and the square pipe 20. Except for this portion, between the web of the channel steel 73 and the concrete wall. Since the sealing material 75 is filled, water and air do not flow out to the side. FIG. 11 is a sectional view taken along line 11-11 of FIG. 9, and similarly, the sealing material 75 is piled up above the flange of the channel steel 73.

The operation of the air distributor 70 will be described with reference to FIG. 8. The water collecting chamber 35 provided under the central drain gullet.
The washing water is supplied to the air, while air is blown from the air blowing port 40. In the figure, washing water is below the horizontal line indicated by W,
The air layer is above. Therefore, the washing water comes out through the water passage hole 25, and the air comes out through the air hole 23, and both are mixed and risen to wash the activated carbon through the activated carbon supporting beds 10 and 50 (not shown). The air distribution device 70 is characterized by having a very small height and a large adsorption area.

The air pipe half 30 is a round pipe,
It is a square pipe or an elliptical pipe divided in half, and the point is that the air pool 24 can be generated.

[0027]

As described above, according to the present invention, since the air distribution device for the activated carbon adsorption equipment is constituted by the air pipe half, the air square pipe, and the activated carbon support bed, the cleaning supplied to the air pipe half is performed. The air for use is primarily distributed by the pipe half for air, secondly distributed by the square pipe for air, thirdly distributed by the lower perforated plate, and fourthly distributed by the upper perforated plate. The height dimension of the air distribution device shown by H in FIG. 5 is smaller than that of the conventional device.

Further, if the constituent elements are made of FRP and are connected only by bolts, the construction is extremely easy.
As described above, according to the present invention, it is possible to easily manufacture and assemble an air distribution device for an activated carbon adsorbing facility, which can disperse air evenly, has a low height, and has a simple structure.

[Brief description of drawings]

FIG. 1 is a sectional view of an air distribution device for an activated carbon adsorption facility according to the present invention.

FIG. 2 is an exploded perspective view of an air distribution device for activated carbon adsorption equipment according to the present invention.

FIG. 3 is an exploded view of an activated carbon support bed of the present invention

FIG. 4 is an explanatory view of the installation of the activated carbon support floor of the present invention.

FIG. 5 is an operation explanatory view of the air distributor of the present invention.

FIG. 6 is a diagram of another embodiment of the activated carbon support bed of the present invention.

FIG. 7 is a diagram of another embodiment relating to the combination of the air pipe half and the air square pipe of the present invention.

FIG. 8 is a diagram (cross-sectional view) of another embodiment of the air distributor of the present invention.

FIG. 9 is a diagram of another embodiment (plan view) of the air distributor of the present invention.

10 is a sectional view taken along line 10-10 of FIG.

11 is a sectional view taken along line 11-11 of FIG.

[Fig. 12] Partial cross-sectional view of a conventional granular activated carbon adsorption facility in a water purification plant

FIG. 13 is a perspective view showing a conventional cleaning device for activated carbon adsorption equipment.

FIG. 14 is a partial sectional view of a conventional cleaning device for activated carbon adsorption equipment.

FIG. 15 is a cross-sectional view of an activated carbon adsorption facility equipped with a conventional strainer type air distribution device.

FIG. 16 is an enlarged view of a conventional strainer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air distribution device for activated carbon adsorption equipment, 10 ... Activated carbon support floor, 11 ... Lattice frame, 12 ... Horizontal rail, 13 ... Vertical rail, 15 ... Lower perforated plate, 16 ... Spacer sheet, 18 ... Upper perforated plate, 19
… Fixing bolts, 20… Square pipes for air, 21… Bottom part, 2
2 ... Air intake hole, 23 ... Air hole, 30 ... Air pipe half, 31 ... Air hole, 44 ... Activated carbon, 50 ... Activated carbon support floor, 52 ... Lower frame, 54 ... Spacer sheet, 56 ... Upper frame, 58 ... Support beam, 59 ... water passage hole, 60 ... water collection room.

Claims (5)

[Claims] 1. An air pipe half having an air hole formed on a side surface of a half-split pipe, and an air intake hole installed above the air pipe half and for receiving bubbles from the air hole, formed in a bottom portion. , An air square pipe having a plurality of air holes formed in the side wall, and a plurality of holes or slits that are placed on the air square pipe and subdivide the bubbles emitted from the air holes of the air square pipe. An air distribution device for an activated carbon adsorption facility, which comprises an activated carbon support bed that is opened and supports activated carbon. 2. The activated carbon adsorption facility according to claim 1, wherein the air pipe half, the air square pipe, and the activated carbon support bed are made of fiber reinforced plastic, and are mutually connected only by bolts. Air distributor. 3. The activated carbon support bed comprises a lattice frame formed by lattice-crossing horizontal rails and vertical rails, a lower perforated plate placed on the lattice frame and having a plurality of holes, and a lower porous plate. Sandwiched between an upper perforated plate having a plurality of holes at positions displaced by 1/2 pitch with respect to the holes of the perforated plate, and a lower perforated plate and an upper perforated plate,
The air distribution device for activated carbon adsorption equipment according to claim 1, which comprises a spacer sheet which secures a certain gap in the height direction. 4. The activated carbon bed has a bottom frame having a sludge plate shape in which slits having a constant gap are opened at equal intervals, and a shape capable of enclosing the bottom frame one size larger than the bottom frame. 2. The activated carbon according to claim 1, comprising an upper frame having slits formed at a position displaced by a pitch of / 2, and a spacer sheet sandwiched between the lower frame and the upper frame to secure a gap in the height direction of a certain dimension. Air distribution device for adsorption equipment. 5. The pipe half for air is fixed to the floor of the water collecting chamber, and the square pipe for air is supported on the floor of the water collecting chamber via a support beam, and a water passage hole is formed in the support beam. The air distribution device for an activated carbon adsorption facility according to claim 1, wherein