JP3089219B2 - Mud sun drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muddy water drying apparatus, and more particularly to a muddy water drying method, wherein solid matter such as earth and sand in muddy water is sun-dried while gravity dewatering with a filter medium such as filter sand. For drying muddy sun drying equipment.

[0002]

2. Description of the Related Art When discharging muddy water generated in civil engineering work into public waters such as rivers for treatment, it is necessary to filter and clarify the muddy water, and particularly to treat a large amount of muddy water. In such a case, a solar drying facility is used. This solar drying system is composed of a plurality of water collecting layers in which a gravel or crushed stone is laid with a substantially constant thickness on an impermeable layer inclined downward in a predetermined drainage direction in a storage tank to which muddy water is supplied. And a filtration layer having a filter layer laid flat on the water-impermeable layer and the water-collecting layer so as to cover the water-collecting layer. The mud in the storage tank is filtered through the filter layer over time. The drainage flows through the water-impervious layer in the direction of the drainage by the catchment layer, is discharged out of the storage tank, and is discharged to a public water body such as a river through an existing drainage facility such as a sewer pipe. The mud is evaporated by sunlight and collected in a state where solids such as soil particles in the mud are deposited on the filter layer. In this way, the solar drying equipment treats muddy water.

[0003]

However, in the conventional muddy sun drying equipment, the solid matter is deposited on the filter layer, and fine soil particles are electrically adsorbed on the soil particles of the filter layer, and There is a problem that the gap between the soil particles grows and the muddy water hardly passes through the filtration layer, and accordingly, it takes time to treat the muddy water. In the catchment layer,
There is a problem that the air stays and the drainage becomes difficult to flow into the water collecting layer, and the drainage in the water collecting layer becomes difficult to flow, and it takes a long time to drain the water. Furthermore, the drainage contains fine soil particles, and the fine soil particles stay on the water collecting layer, causing clogging, making it difficult for the drainage to flow, and requiring time for draining the drainage. is there. Therefore, the mud in the storage tank contains a large amount of water, and there is a problem that a period for drying the mud in the sun becomes long. Furthermore, if rain falls during the solar drying period, most of the mud mixed with rainwater in the storage tank must be drained through the sedimentation filtration layer, and the period required for solar drying becomes longer, and the mud There is a problem that processing efficiency is reduced.

[0004] In order to solve this problem, it is necessary to increase the filtration area of the solar drying equipment for muddy water. However, in order to obtain a large filtration area, the storage tank must be enlarged or the number of storage tanks must be increased.
This requires a large yard, increases equipment costs, and causes a problem of poor economic efficiency.

It is an object of the present invention to quickly guide muddy water to a filtration layer, smoothly and promptly move the filtrate, and improve muddy water treatment efficiency without increasing the filtration area. It is to provide solar drying equipment.

[0006]

According to the present invention, in a storage tank to which muddy water is supplied, gravel or crushed stone is substantially fixed on an impermeable layer inclined downward toward a predetermined drainage direction. A plurality of rows of water collecting layers laid with a thickness of, and a sedimentation filtration layer having a filtration layer laid in a flat pattern so as to cover the water collection layer with sand on the water-impermeable layer and the water collection layer, In the muddy water drying equipment for guiding the filtrate passing through the filter layer to the water collecting layer and discharging the muddy water in the storage tank out of the storage tank, the water collecting layer includes a bundle of culvert drainage pipes. Is buried, and on the water collecting layer, a lower end part is partially embedded in the filtration layer, and a water collecting pipe bundle is provided upright, the upper end part protruding above the position of the water surface at the muddy water full level. The thickness of the filter layer below the lower end face of the bundle of water pipes on the top is the settling filtration surface of this filter layer. A sun drying equipment mud, characterized in that it is selected smaller than the thickness of up al catchment layer.

According to the present invention, even if solids in the muddy water are deposited on the sedimentation filtration surface, the muddy water is guided to the filtration surface close to the water collecting layer of the filtration layer by the bundle of conduits. Regardless of the presence or absence of the accumulation of the solid matter, the muddy water can be quickly guided to the settling filtration layer. A culvert drainage bundle is buried in the catchment layer, so a waterway is secured in the catchment layer,
The drainage can be easily moved and guided to the downstream side in the drainage direction. Therefore, the treatment period of the muddy water can be shortened, and the muddy water treatment efficiency can be improved. Further, the thickness of the filtration layer below the lower end face of the water bundle on the water collecting layer is selected to be smaller than the thickness from the sedimentation filtration surface of the filtration layer to the water collecting layer, so that the head in the water bundle is less than The head from the muddy water surface to the sedimentation filtration surface of the filtration layer can be made larger, so that the water permeation speed to the filtration layer immediately below the headrace bundle is made higher than the water permeation speed from the sedimentation filtration surface to the filtration layer. , Treatment time of muddy water can be shortened.

According to a second aspect of the present invention, in the configuration of the first aspect, the culvert drainage pipe bundle and the water conduction pipe bundle have a base portion and a plurality of peripheral wall portions connected to the base portion. A plurality of drain pipes, each of which defines a plurality of intake ports extending along the axis and a plurality of internal spaces communicating with the respective intake ports, are formed by binding a plurality of drain pipes.

According to the present invention, the culvert drain pipe bundle and the water conduit pipe bundle are composed of a plurality of bound drain pipes, each drain pipe being connected to a plurality of intake ports extending along the axis and each of the intake ports. A plurality of internal spaces are formed. Since each water intake of the drain pipe is formed to extend along the axis, water can easily flow into each internal space and water collection can be improved. Drained water guided to the culvert drain bundle and mud guided to the conduit bundle enter each internal space from each intake, and the intrusion of solids in the mud by the base and the end of each peripheral wall facing each intake. In the culvert drain pipe bundle, the solid matter stays in each internal space, and the drainage can be guided to the downstream side in the drainage direction along the inner peripheral surface of each peripheral wall without clogging. In the tube bundle, muddy water can be filtered to some extent at each water intake and guided to a filtration layer. Also, since a plurality of drainage pipes are bundled to form a culvert drainage pipe bundle and a headrace bundle, the culvert drainage pipe bundle and the headrace bundle can collect water from the entire circumferential direction. Can be improved.

According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the projecting ridge is provided at a base portion of each drain pipe at a position shifted from a portion where a front end portion facing the water intake port is opposed. It is characterized by being formed along the axis.

According to the present invention, a ridge is formed at the base of each drainage pipe along the axis at a position shifted from a portion where the tip end facing the water intake port is opposed to the water intake port. Mouth closure can be prevented. Further, since the space near the intake port is formed to be bent, the drainage and muddy water are bent, and solids in the drainage and muddy water are deposited near the base end of the ridge, and the space in the internal space is reduced. Clogging can be prevented.

According to a fourth aspect of the present invention, in the configuration of the second or third aspect, a reinforcing piece protruding outward and extending along the axis is formed on each peripheral wall portion. And

According to the present invention, since the reinforcing pieces protruding outward and extending along the axis are formed on each peripheral wall portion, the rigidity of the drainage pipe can be increased, and the external pressure can be reduced by the respective drainage pipes. , Each peripheral wall portion is not easily deformed, and it is possible to prevent each drain pipe from blocking each intake port mutually. Further, when a plurality of drain pipes are bound, the reinforcing piece abuts on the peripheral wall portion or the reinforcing piece of another drain pipe, so that many spaces can be secured between the drain pipes. Along with this, the filtered water guided to the culvert drainage bundle and the muddy water guided to the conduit bundle are further filtered by passing through gaps communicating with a large number of spaces formed between the respective drainage pipes. The drainage and the muddy water are guided not only from the mouth to each internal space but also from the large number of spaces, and a large flow path cross-sectional area can be obtained to improve drainage.

According to a fifth aspect of the present invention, in the configuration of any one of the first to fourth aspects of the present invention, the water pipe bundle has an upper end opening above a water surface at a muddy water full level. And a vent pipe whose lower end is open to the water collecting layer is provided.

According to the present invention, the conduit bundle is provided with a vent pipe having an upper end opening above the muddy water surface and a lower end opening toward the water collecting layer. The air inside can be discharged directly into the atmosphere, which makes it easier for the drainage to flow into the catchment layer, and allows the drainage in the culvert drainage bundle to move smoothly and quickly to the downstream in the drainage direction. Can be. Along with this, the treatment period of the muddy water can be shortened, and the muddy water treatment efficiency can be improved.

[0016]

FIG. 1 is an enlarged sectional view showing a part of a muddy sun drying facility 1 according to an embodiment of the present invention, and FIG. 2 is a plan view of the muddy sun drying facility 1. And FIG.
FIG. 3 is an enlarged cross-sectional view of a part taken along line III-III in FIG. 2. The muddy sun drying equipment 1 is dug down to an almost flat surface with a concrete inverted T-shaped retaining wall 3 forming a storage tank S to which muddy water is supplied on an impermeable layer 6 to be described later, and a field surface 4. On the excavated bottom surface 5, the water-impermeable layer 6 made of earth and sand having a small water permeability such as a viscous soil inclined downward in the drainage direction A from above to below in FIG. 2;
A sedimentation filtration layer 7 laid along the drainage direction A on the water-impermeable layer 6.

The inverted T-shaped retaining wall 3 includes a vertical wall 8 extending vertically from below the local surface 4 to above the local surface 4,
A bottom plate 9 connected to the lower end of the vertical wall 8 and extending horizontally.
And The storage tank S is opened upward and has a substantially square planar shape in the present embodiment. The rear footing 10 of the bottom slab 9 has soil covering up to the excavation bottom surface 5. At the front end of the front footing 11 of the bottom slab 9, a front wall 12 is integrally erected. Vertical wall 8, front footing 11, and front wall 1
2 forms a drain 13. The top surface of the front footing 11, that is, the bottom surface of the drainage channel 13 is
And has a drainage gradient that decreases in the circumferential direction toward a drainage port formed at a predetermined position on the front wall 12. The drainage port is connected to and communicates with an existing drainage facility such as a sewer pipe.

The sediment filtration layer 7 is composed of a plurality of rows (18 in the present embodiment) of gravel or crushed stone called a bals on the water-impermeable layer 6 with a substantially constant thickness and spaced from each other in a direction perpendicular to the drainage direction A. The water collecting layer 14 is laid and connected to each upstream end and each downstream end in the drainage direction A, and sand is imposed on the water-impermeable layer 6 and the water collecting layer 14. And a filter layer 16 laid flat so as to cover it. Here, the water collecting layer 14 may be formed of rubble stone.

A culvert drain pipe bundle 17 is embedded in the water collecting layer 14 along the drain direction A. That is, the culvert drain pipe bundles 17 are arranged in the water collecting layer 14 in a plurality of rows spaced apart from each other in the direction perpendicular to the drain direction A (in this embodiment, 1
8) Be buried. On the water collecting layer 14, the lower end 18a is partially embedded in the filtration layer 16, and the upper end 18b is
A plurality of water pipe bundles 18 projecting upward from the position of the water surface at the full water level are erected at intervals from each other along the axis of each culvert drain pipe bundle 17.

At one end in the axial direction of each of the culvert drainage pipe bundles 17, it extends in a direction perpendicular to the drainage direction A and is buried in the water collecting layer 14. The culvert drainage pipe bundles 17a are respectively connected by, for example, T-shaped pipes. At the other axial end of each of the culvert drainage pipe bundles 17, the culvert drainage pipe bundles 17 extend in a direction perpendicular to the drainage direction A and are buried in the water collecting layer 14. 17b are connected by, for example, a T-tube. Downstream culvert drainage bundle 17
b, a plurality (2 in this embodiment) of discharge culvert drain pipe bundles 20 that pass through drain holes 19 formed in the vertical wall 8.
a and 20b are connected.

The solar drying equipment 1 has the drainage direction A
A supply pipe 21 for supplying muddy water 2 is provided on the upstream side and at the center in the width direction which is the left-right direction in FIG. A concrete water tap 22 is provided in a part of the water collecting layer 14 where the muddy water 2 discharged from the supply pipe 21 falls.

The drain hole 19 is provided on the upper surface 12a of the front wall 12.
Is provided at substantially the same height as or above.
In this manner, the openings of the discharge culvert drainage pipe bundles 20a and 20b are opened at substantially the same height as or higher than the upper surface 12a of the front wall 12, so that the discharge culvert drainage pipe bundles 20a and 20b are discharged from the drain holes 19. 20b can be easily inserted / removed, whereby maintenance, inspection, and maintenance of each discharge culvert drainage pipe bundle 20a, 20b and their insertion holes can be easily performed.

Each water bundle 18 is provided with a tubular body 23 near its upper end 18b. The cylindrical body 23 is provided with a plurality (three in the present embodiment) of leg portions 24 at substantially equal intervals in the circumferential direction. Each leg portion 24 is an angle made of hot-dip galvanized and formed in a substantially L-shaped cross section perpendicular to the axis, and its axial length L is, for example, about 1.8 m. The axis of each leg 24 and each conduit bundle 1
The angle θ1 formed with the axis 8 is, for example, 30 °. One end of each leg 24 in the axial direction is fixed to the cylindrical body 23, and the other end in the axial direction is the filter layer 1.
Embedded in 6. In this way, each water pipe bundle 18 is erected on the filtration layer 16. Each culvert drainage pipe bundle 17, 17
a, 17b, 20a, 20b and each of the conduit bundles 18
It is formed by binding a plurality of drain pipes 25 described later.

Each culvert drain pipe bundle 17, 17a, 17b, 2
0a and 20b are formed such that their outer shapes are substantially circular. Underdrain drain pipe bundle 17, 17a, 17b, 20a, 2
As an example of the size of 0b, the diameter is about 100 mm, and at this time, 13 drain pipes 25 to be described later are bound to form each of the culvert drain pipe bundles 17, 17a, 17b, 20a, and 20b. The water pipe bundle 18 is formed such that its outer shape is substantially circular. An example of the dimensions of the water pipe bundle 18 is as follows.
Its diameter is about 300mm and its axial length is 2m
It is about. At this time, 120 drainage pipes 25 to be described later are bound to form the water pipe bundle 18. Each culvert drain pipe bundle 17,
17a, 17b, 20a, 20b and a bundle 18 of water pipes
Are bound by a binding member 32 such as a synthetic resin band at 1 m intervals in the axial direction.

The thickness T1 of the water collecting layer 14 is, for example, 30 c
m, and the width B is, for example, about 1 m. The thickness T2 of the filtration layer 16 on the water collecting layer 14 is, for example, about 30 cm. The embedding length D of the conduit bundle 18 is, for example, 10
cm. Therefore, the lower end surface 18 of the water pipe bundle 18
The effective thickness T3 of the filtration layer 16 below c is, for example, 20 cm. The particle size of the sand of the filtration layer 16 is, for example, 0.1 mm.
074-2 mm.
Crushed stone having a particle size range of about 13 to 5 mm specified as a single-sized crushed stone S-13 (No. 6) in IS A5001 is used.

FIG. 4 is a perspective view showing the structure of the drain pipe 25. The drain pipe 25 has a flat base 26 and a plurality (two in the present embodiment) of peripheral wall portions 27 that are continuous with the base 26 and have a substantially C-shaped cross section perpendicular to the axis. Therefore, drain pipe 2
5, two intake ports 28 extending along the axis by the base 26 and the two peripheral wall portions 27 and two internal spaces 29 a and 29 b communicating with the respective intake ports 28 are formed.
The base 26 of each drain pipe 25 has a plurality of (two in this embodiment) ridges 30 at positions offset from the portions where the distal end portions 27a and 27b of the peripheral wall portions 27 facing the water intake ports 28 face each other.
a and 30b are respectively formed along the axis. That is, each of the ridges 30a and 30b has a position facing each of the internal spaces 29a and 29b from a portion where the distal end portions 27a and 27b of each peripheral wall portion 27 facing each water intake 28 and a position facing outward from the portion. Are formed along the axis.

A plurality of (two in the present embodiment) reinforcing pieces 31 projecting outward and extending along the axis are formed on each peripheral wall portion 27, respectively. Each reinforcing piece 31 has a substantially C-shaped cross section perpendicular to the axis. The drain pipe 25 is, for example, a synthetic resin extruded product having good slippage.

Each drain pipe 25 collects water from each intake port 28 and drains water through internal spaces 29a and 29b. Since each water intake 28 is formed to extend along the axis of the drain pipe 25, water can easily flow into each of the internal spaces 29a and 29b, and water collection can be improved. The shape of each water inlet 28 is funnel-shaped, and the water intake is good.
Reference numerals a and 29b denote drains that are almost circular. The space in the vicinity of each water intake 28 is formed to be bent by the ridges 30a and 30b.

When a plurality of drain pipes 25 are bound, water is collected from the entire circumference of each drain pipe 25 in the circumferential direction. Each reinforcing piece 31
Can prevent the adjacent drain pipe 25 from being fitted into each intake port 28 and blocking each intake port 28. Further, when the plurality of drainage pipes 25 are bound, each reinforcing piece 31 comes into contact with each drainage pipe 25, and a large number of spaces other than the internal spaces 29 a and 29 b facing each peripheral wall portion 27 are formed between the drainage pipes 25. As a result, drainage, clogging resistance and pressure resistance are improved.

The inner peripheral surface of each peripheral wall 27 is formed smoothly, and the outer peripheral surface of each peripheral wall 27 is also formed smoothly. Further, the C-shaped reinforcing piece 31 forms a substantially circular space, which serves as a drain passage.

External pressure is applied from above to the peripheral wall portion 27 forming the one internal space 29a, and the other internal space 29a.
When the distal end portions 27a and 27b of the peripheral wall portions 27 are to be rolled inward by being added to the peripheral wall portion 27 forming the b from below, each of the distal end portions 27a and 27b is supported by each of the ridges 30a. . Further, an external pressure is applied from below to the peripheral wall 27 forming one internal space 29a, and is applied from above to the peripheral wall 27 forming the other internal space 29b.
When 7b is to be pushed out, each ridge 30
b supports the tip portions 27a and 27b.

When an external pressure from the width direction is applied to each of the peripheral wall portions 27, each of the distal end portions 27a, 27b
Are supported, and a circular tubular waterway is secured.

Each of the ridges 30a, 30b is connected to each of the intake ports 28.
Is provided in the vicinity of the ground, and soil particles are blocked and fine soil particles, for example, silt and clay, are deposited once in the vicinity of the base end of each of the ridges 30a and 30b due to the once-flowing of the drainage water. Clogging can be prevented.

Each peripheral wall 27 of the drain pipe 25 has a substantially C
When the drainage pipes 25 are bound together, a large number of spaces are secured between the drainage pipes 25, and soil particles and the like are only filtered by passing through gaps communicating with these spaces. In addition, the drainage and muddy water 2 are guided by each space, and a large flow path cross-sectional area can be obtained to improve drainage. Furthermore, the substantially circular space of the substantially C-shaped reinforcing pieces forms a water channel, and even if a large number of drain pipes 25 are bound, the substantially C-shaped reinforcing pieces 31 do not bite into the water intake port 28 and are not closed. In addition, collecting and draining properties can be improved.

Further, a substantially C-shaped reinforcing piece 31 of the drain pipe 25 is provided.
Has a notch in a part of its circumference, so it has elasticity against external pressure and improves pressure resistance in high embankment. Here, as an example of the dimensions of the drain pipe 25, the width W is about 25 mm, the height H is about 24 mm, and the length in the axial direction is about 4 m. In addition, this drain pipe 25
When this unity is performed, a drain pipe bundle with an outer diameter of 75 mm is obtained.
When no wires are bound, a drain pipe bundle having an outer diameter of 300 mm is obtained.

The muddy water 2 supplied into the storage tank S is filled up to a distance H2 from the sedimentation filtration surface 15 to the water surface.
The muddy water 2 passes through the filtration layer 16 by applying a pressure corresponding to the water head H2 to the sedimentation filtration surface 15 excluding the region where the water pipe bundle 18 is erected. The muddy water 2 is guided to the water-guiding tube bundle 18 from the entire circumference in the circumferential direction. At this time, the muddy water 2a in the water pipe bundle 18 is filtered by the filtration layer 16 facing the lower end face 18c of the water pipe bundle 18.
Up to the distance H1 from the surface to the water surface.

The muddy water 2 is bent in the vicinity of the water intake 28 facing the gaps connected to the many spaces between the drainage pipes 25 and the tips 27a, 27b of the ridges 30a, 30b and the peripheral wall 27. The inner space 29a, 29b of the water pipe bundle 18 is filtered to some extent by passing through
And the large number of spaces. A pressure corresponding to the water head H1 acts on the surface of the filtration layer 16, and the muddy water 2a passes through the filtration layer 16.

It is known that the rate of water permeation through the filtration layer 16 is inversely proportional to the thickness of the filtration layer 16 and proportional to the head.
The effective thickness T3 is smaller than the thickness T2, and the water head H
1 is larger than the head H2, the rate of water permeation to the filtration layer 16 immediately below the headrace bundle 18 is reduced from the settling filtration surface 15 to the filtration layer 16
To be greater than the rate of water permeation.

As time passes, the sedimentation filtration surface 15
Solid matter in the muddy water 2 is deposited on the top. In addition, the water level of the muddy water 2 decreases as the water in the muddy water 2 is discharged. Accordingly, the pressure acting on the sedimentation filtration surface 15 decreases, and the muddy water 2 on the sedimentation filtration surface 15 is hardly passed through the filtration layer 16. Since the muddy water 2 is guided, the muddy water 2 can be always guided to and passed through the filter layer 16 regardless of the presence or absence of the solid matter on the filter layer 16, and the muddy water 2 can be efficiently treated.

Further, since the muddy water 2a in the conduit bundle 18 has been filtered to some extent, the solids in the muddy water 2a are small and the solids settle for a longer time, and the lower end surface 18c of the conduit bundle 18 for a long time. The muddy water 2a can be passed through the surface of the filtration layer 16 facing the. At this time, the permeated water passing through the filtration layer 16 immediately below the water bundle 18 can reach the water collecting layer 14 most quickly. Even if the solids are deposited on the surface and the muddy water 2a is difficult to pass through the surface, the muddy water 2a can pass through the filtration layer 16 from the side of the lower end portion 18a.

The filtered water that has passed through the filter layer 16 in this way flows into the gaps between the crushed stones that constitute the water collecting layer 14, and from the entire circumferential direction of each bundle of culvert drain pipes 17, 17a, 17b, 20a, and 20b. Inflow. Although this drainage contains fine soil particles, gaps communicating with a large number of spaces between the drain pipes 25 of the culvert drain pipe bundle 17 and the ridges 30 a and 30 b and the tip 27 a of each peripheral wall 27 are provided. , 27b
By passing the filtered water through the bent space near 8,
Further, filtered water having less fine soil particles flows into each of the internal spaces 29a and 29b and the above-mentioned many spaces, and flows downstream in the drainage direction A. The filtrate reaching the other end of each culvert drain bundle 17 is guided to the other culvert drain bundle 17b,
Drainage channel 13 through discharge culvert drainage bundle 20a, 20b
The water is discharged from drainage outlets and then discharged into public waters such as rivers.

Thus, the solar drying equipment 1 is provided with the muddy water 2
As much water as possible is discharged out of the storage tank S within a short period of time, and the remaining muddy water is dried in the sun.

The muddy water 2 in the storage tank S is filtered by the filtration layer 16, and the drainage water is collected in each of the culvert drainage pipe bundles 17, 17a, 17b, 2
The water enters the internal spaces 29a and 29b and the plurality of spaces from the water intake ports 28 of the drain pipes 0a and 20b, flows downstream in the drainage direction A, and is discharged to the drainage channel 13. In addition, the muddy water 2 is supplied from each of the drainage pipes 25 to each of the internal spaces 29a and 29b from the entire circumference in the circumferential direction by the water bundle 18.
, And into a large number of spaces between the drain pipes 25. In the vicinity of each intake 28, each of the ridges 30a, 30b
The muddy water 2 is provided with each ridge 3 near each intake 28.
Since it passes through the space bent by the spaces 0a and 30b and the gap communicating with the large number of spaces, the solid matter in the muddy water 2 is filtered and led to the internal spaces 29a and 29b. Even if the solid matter in the muddy water 2 is deposited on the sedimentation filtration surface 15, the muddy water 2 is guided from the entire circumferential direction of the water conduit bundle 18 by the water conduit bundle 18, and the filtration near the water collecting layer 14 of the filtration layer 16. Since the muddy water 2 is guided to the surface, the muddy water 2 can be quickly guided to the filtration layer 16 regardless of the presence or absence of the solid matter on the filtration layer 16. Also, since each of the culvert drainage pipe bundles 17, 17a, 17b, 20a and 20b are buried in the water collecting layer 14, a drainage channel is secured in the water collecting layer 14 and each of the culvert drainage pipe bundles 1
7, 17a, 17b, 20a, and 20b, the drainage is collected from the circumferential direction, and the drainage is guided to each of the internal spaces 29a and 29b, the large number of spaces, and the spaces of the reinforcing pieces 31, and the drainage is drained in the drain direction A. It can be guided to the downstream side and discharged smoothly and quickly out of the storage tank S. Therefore, the treatment period of the muddy water 2 can be shortened without increasing the filtration area by providing the culvert drainage bundle 17 and the conduit bundle 18 in the conventional solar drying equipment, and the treatment efficiency of the muddy water 2 can be improved. it can.

FIG. 5 is an enlarged sectional view showing a part of a muddy sun drying apparatus 41 according to another embodiment of the present invention.
In the present embodiment, portions corresponding to the configuration of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Muddy water 2
A bundle of water guides 42 of the solar drying equipment 41 is provided on the water collecting layer 14, a lower end 42 a of the bundle of water guides 42 is partially embedded in the filtration layer 16, and an upper end 42 b is a water surface at a full water level of the muddy water 2. Is provided so as to protrude above the position. Further, the water pipe bundle 42 has an upper end 42b that opens above the level of the water surface when the muddy water 2 is full, and a lower end 42b.
A ventilation pipe 43 made of, for example, a vinyl chloride resin is provided in which a opens toward the water collecting layer 14. A plurality of drainage pipes 25 are provided in a bundle around the ventilation pipe 43. Further, the water pipe bundle 42 has a tubular body 23 and a plurality of legs 24.

The upper end portion 42b of the water bundle 42 is opened above the level of the muddy water 2 at the full water level,
In addition, since the ventilation pipe 43 whose lower end 42a is open to the water collecting layer 14 is provided, the air in the water collecting layer 14 can be directly discharged into the atmosphere, and the water collecting layer 14 can be easily drained. Inflow, each culvert drainage pipe bundle 17, 17a, 17b, 20a,
The drainage in 20b can be smoothly and promptly moved to the downstream of the drainage direction A, and the drainage can be discharged to the outside of the storage tank S in a short period of time, and the treatment efficiency of the muddy water 2 can be improved. .

FIG. 6 is a cross-sectional view at right angles to the axis showing the structure of a drain pipe 50 according to still another embodiment of the present invention. In the present embodiment, portions corresponding to the configuration of the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Drain pipe 50
Has a substantially Y-shaped base portion 51 and a plurality (three in this embodiment) of peripheral wall portions 52 connected to the base portion 51 and having a substantially C-shaped cross section perpendicular to the axis. Therefore, the drain pipe 50 has the base 5
A plurality (three in this embodiment) of water intakes 53 extending along the axis by one and a plurality of peripheral wall portions 52, and a plurality of (three in this embodiment) internal spaces 54a, 54b, 54c communicating with each water intake 53. Are formed. At the base 51 of each drain pipe 50, each peripheral wall 52 facing each water intake 53
Positions of the leading end portions 52a, 52b, 52c of the inner spaces 54a, 54b, 54
A plurality (two in this embodiment) of ridges 55a and 55b are formed along the axis at positions facing c and outward. Each of the peripheral wall portions 52 is formed with a reinforcing piece 56 projecting outward and extending along the axis and having a substantially C-shaped cross section perpendicular to the axis. A plurality of the drainage pipes 50 configured as described above are bundled to constitute the culvert drainage pipe bundle 17 and the water conduit bundles 18 and 42. The effects of these configurations are almost the same as those of the drain pipe 25 described with reference to FIG. 4, but since the number of the intake ports 53 and the peripheral wall portions 52 is larger than that of the drain pipe 25 shown in FIG. And the drainage property can be improved.

FIG. 7 is a sectional view perpendicular to the axis showing the structure of a drain pipe 60 according to still another embodiment of the present invention. In the present embodiment, portions corresponding to the configuration in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The drain pipe 60 has an annular pipe 61a and a pipe 61a on its outer peripheral surface.
And a plurality of ridges 61b (6 in this embodiment) protruding outward in the radial direction, and a plurality of ridges 61b of the base 61, each of which has a substantially C-shaped section perpendicular to the axis (this embodiment). In the embodiment, the peripheral wall portion 62 of 6) is provided. Therefore, the drainage pipe 62 has a plurality of (six in the present embodiment) intake ports 63 extending along the axis by the base portion 61 and the plurality of peripheral wall portions 62, and a plurality of (six in the present embodiment) communicating with the respective intake ports 63. An internal space 64 is formed.
Each projection 61b of the base 61 of the drainage pipe 60 is located at a position shifted from a portion where the distal end portion 62a of each peripheral wall 62 facing the water intake 63 is opposed, that is, each internal space 64 of each projection 61b of the base 61. Are formed along the axis. Drain pipe 6 configured in this way
0 are bundled to form the above-mentioned culvert drain pipe bundle 17 and water guide pipe bundles 18 and 42. The shape of each intake 63
It is formed in a funnel shape so that water around the drain pipe 60 can be efficiently collected in each internal space 64.

The drainage pipe 60 is formed so that each water intake 63 is opened radially outward of the drainage pipe 60 and extends along the axis, so that water is collected from the entire circumference of the drainage pipe 60 in the circumferential direction. In addition, water can easily flow into each internal space 64, and water collection can be improved. Further, the inner surface facing each internal space 64 is formed smoothly, so that drainage can be easily performed. Furthermore, 6
Since two drainage channels are formed, drainage is improved, and even if some drainage channels are clogged, drainage is performed in other drainage channels, and as a result, clogging resistance can be improved. .

Further, since a plurality of ridges 65 are formed on the base portion 61 on the side of each internal space 64, external pressure is applied to the six peripheral wall portions 62 forming the six internal spaces 64, and each peripheral wall portion 62 is formed. When the distal end portion 62a is to be rolled inward, the distal end portion 62a of each peripheral wall portion 62 is supported by the ridge 65, and the drainage path of the collected water can be prevented from being compressed and broken.

In the embodiment of the present invention shown in FIGS. 1 to 7, the culvert drain pipe bundle 17 and the water conduit pipe bundles 18, 42
Is formed by bundling any of the drain pipes 25, 50, and 60. Instead, air permeability is formed in an axial direction formed by bundling a plurality of long members and in a direction intersecting the axis. And a bundle having water permeability, for example, a bamboo bundle and a soda bundle may be used.

In the embodiment of the present invention shown in FIGS. 1 to 5, the outer shape of the water pipe bundles 18 and 42 is formed in a substantially circular shape. You may. By doing so, the number of drainage pipes forming the headrace bundle can be increased, whereby a large amount of water can be guided into the headrace bundle, and muddy water 2
Can be treated in a short period of time, and the muddy water treatment efficiency can be further improved.

In the embodiment of the present invention shown in FIG. 5, one vent pipe 43 is provided, but a plurality of, for example, three vent pipes 43 may be provided. By doing so, the air in the water collecting layer 14 can be quickly discharged into the atmosphere as compared with the case where one ventilation pipe 43 is provided, so that the filtered water further flows into the water collecting layer 14. And drainage in the catchment layer 14 quickly
7 and can be discharged. Although the ventilation pipe 43 is made of vinyl chloride resin, it may be made of stainless steel instead.

In the embodiment of the present invention shown in FIGS. 1 to 7, the culvert drainage pipe bundle 17 and the water conduit pipe bundles 18, 42 are shown.
Is constructed by bundling any one of the drain pipes 25, 50, and 60. Instead, a single drain pipe 2 is used.
Any one of 5, 50, and 60 may be used.

When the muddy water is dried using the solar drying equipment 1 for muddy water 2 of the present invention, cracks are formed on the surface of the solid matter deposited in a few days, centering on the bundles 18 and 42 of the water pipes. If there is rainfall before the cracks enter, rainwater infiltrates the solid and it takes time to dry the muddy water 2, but after the cracks gradually develop and reach the entire surface of the solid, Even if there is rainfall, most of the rainwater is discharged from the cracks through the sedimentation filtration layer 7. The dried solid has a size of about 10 cm square and can be easily separated from the filtration layer 16 and used for landfilling.

[0055]

According to the first aspect of the present invention, even if solids in the muddy water are deposited on the sedimentation filtration surface, the muddy water is transferred to the filtration surface close to the water collecting layer of the filtration layer by the bundle of conduits. Since the liquid is guided, muddy water can be promptly guided to the precipitated filtration layer regardless of the presence or absence of the solid matter on the precipitated filtration layer. Also, since the drainage pipe bundle is buried in the water collecting layer, a water channel can be secured in the water collecting layer, and the drainage can be easily guided to the downstream side in the drainage direction. Therefore, the treatment period of the muddy water can be shortened, and the muddy water treatment efficiency can be improved. In addition, the head in the bundle of conduits can be made larger than the head from the muddy water surface to the sedimentation filtration surface of the filtration layer, whereby the rate of water permeation to the filtration layer immediately below the bundle of conduits is reduced from the sedimentation filtration surface to the filtration layer. Greater than the permeation rate to
The muddy water treatment period can be shortened.

According to the second aspect of the present invention, the culvert drainage pipe bundle and the conduit pipe bundle include a plurality of bound drainage pipes, each drainage pipe having a plurality of intake ports extending along the axis, and A plurality of internal spaces communicating with the water intake are formed. Since each water intake of the drain pipe is formed to extend along the axis, water can easily flow into each internal space and water collection can be improved. Drained water led to the culvert drain bundle and muddy water led to the conduit bundle enter each internal space from each intake,
Since the solid portion in the muddy water is prevented from entering by the base portion facing each intake port and the end portion of each peripheral wall portion, in the culvert drain pipe bundle, the solid material stays in each internal space and is drained without clogging. Can be guided to the downstream side in the drainage direction along the inner peripheral surface of each peripheral wall portion, and in the water pipe bundle, muddy water can be filtered to some extent at each water intake and guided to the filtration layer. Also, since a plurality of drainage pipes are bundled to form a culvert drainage pipe bundle and a headrace bundle, the culvert drainage pipe bundle and the headrace bundle can collect water from the entire circumferential direction. Can be improved.

According to the third aspect of the present invention, at the base of each drain pipe, a ridge is formed along the axis at a position deviated from a portion where a front end portion facing the water intake port faces. In addition, it is possible to prevent each intake port from being closed due to external pressure. Further, since the space near the intake port is formed to be bent, the drainage and muddy water are bent, and solids in the drainage and muddy water are deposited near the base end of the ridge, and the space in the internal space is reduced. Clogging can be prevented.

According to the fourth aspect of the present invention, since the reinforcing piece protruding outward and extending along the axis is formed on each peripheral wall, the rigidity of the drain pipe can be increased,
Even when an external pressure is applied to each drain pipe, each peripheral wall is hardly deformed, and it is possible to prevent each drain pipe from blocking each intake port mutually. Further, when a plurality of drain pipes are bound, the reinforcing piece abuts on the peripheral wall portion or the reinforcing piece of another drain pipe, so that many spaces can be secured between the drain pipes. Along with this,
Drained water guided to the culvert drainage bundle and muddy water guided to the conduit bundle are further filtered by passing through gaps communicating with a number of spaces formed between the drainage pipes, and from each intake to each internal space. In addition to the above, the drainage and the muddy water are also guided by the large number of spaces, and a large flow path cross-sectional area can be obtained to improve drainage.

According to the fifth aspect of the present invention, the conduit bundle is provided with a vent pipe whose upper end is opened above the muddy water surface and whose lower end is opened facing the water collecting layer. Therefore, the air in the catchment layer can be directly discharged into the atmosphere, which makes it easier for the filtrate to flow into the catchment layer, and smoothly and promptly drains the drainage in the culvert drainage pipe bundle downstream. Can be moved to the side. Along with this, the treatment period of the muddy water can be shortened, and the muddy water treatment efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing a part of a muddy sun drying facility 1 according to an embodiment of the present invention.

FIG. 2 is a plan view of the solar drying equipment 1 for muddy water.

FIG. 3 is a partially enlarged cross-sectional view taken along line III-III of FIG. 2;

FIG. 4 is a perspective view showing a configuration of a drain pipe 25.

FIG. 5 is an enlarged sectional view showing a part of a muddy sun drying facility 41 according to another embodiment of the present invention.

FIG. 6 shows a drain pipe 5 according to still another embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along a line perpendicular to an axis, illustrating a configuration of No. 0;

FIG. 7 shows a drain pipe 6 according to still another embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along a line perpendicular to an axis, illustrating a configuration of No. 0;

[Explanation of symbols]

1,41 muddy sun drying equipment 2 muddy water 6 impermeable layer 7 sedimentation filtration layer 14 water collecting layer 16 filtration layer 17 culvert drainage pipe bundle 18,42 water conveyance pipe bundle 25,50,60 drainage pipe 26,51,61 base 27, 52, 62 Peripheral wall portions 27a, 27b, 52a, 52b, 52c, 62a Tip portions 28, 53, 63 Intake ports 29a, 29b, 54a, 54b, 54c, 64 Internal spaces 30a, 30b, 55a, 55b, 65 ridges 31 , 56 Reinforcement piece 43 Vent pipe S Storage tank

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-299499 (JP, A) JP-A-10-235400 (JP, A) JP-A-60-25887 (JP, U) 45320 (JP, B2) JP 60-5020 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02B 11/00 C02F 1/14-1/16

Claims (5)

(57) [Claims] 1. A plurality of water collecting layers in which gravel or crushed stone is laid with a substantially constant thickness on an impermeable layer inclined downward in a predetermined drainage direction in a storage tank to which muddy water is supplied; A filtration layer laid on the water-impervious layer and the water-collecting layer so as to cover the water-collecting layer, and a filter layer laid in a flat state, and the filtrate passing through the filter layer is collected into a water-collecting layer. A muddy water drying facility that guides and discharges the muddy water from the storage tank while drying the muddy water in the storage tank.In the water collection layer, a bundle of culvert drainage pipes is buried. Is partially embedded in the filtration layer,
A bundle of water guide tubes whose upper end protrudes above the position of the water surface at the muddy water full level is erected, and the thickness of the filter layer below the lower end surface of the bundle of water guide tubes on the water collecting layer is determined by the sedimentation of this filter layer. Mud water solar drying equipment, which is selected to be smaller than the thickness from the filtration surface to the water collecting layer. 2. The culvert drainage pipe bundle and the water pipe bundle have a base and a plurality of peripheral walls connected to the base, and a plurality of water intake ports extending along the axis by the base and the respective peripheral walls.
2. The muddy sun drying apparatus according to claim 1, wherein a plurality of drainage pipes each having a plurality of internal spaces communicating with the respective water intakes are formed. 3. The base according to claim 2, wherein a ridge is formed along the axis of the base of the drain pipe at a position shifted from a portion where a front end portion facing each water intake port faces. Mud sun drying equipment. 4. The facility for drying muddy water according to claim 2, wherein a reinforcing piece protruding outward and extending along the axis is formed on each peripheral wall portion. 5. The water pipe bundle is provided with a vent pipe whose upper end is opened above the position of the water surface at the muddy water full level and whose lower end is opened facing the water collecting layer. The solar drying equipment for muddy water according to any one of claims 1 to 4.