JP3787728B2 - River purification equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The water that flows into the river is purified and joined by pretreatment, but pollution is inevitable when the amount of water flowing in increases. The present invention relates to such a river purification apparatus.
[0002]
[Prior art]
Some conventional purification devices attempt to purify water by installing a device using a vacant land (river bed, etc.) on the revetment. As an example, a sprinkling pipe communicating with the upstream side is buried in a vacant land and water is infiltrated into this soil, a water collecting pipe buried along the sprinkling pipe is communicated with the downstream side, and the water penetrating the soil is recovered and downstream (See JP-A-3-262595). Alternatively, there is a method in which a bypass water channel is formed in a river bed and activated lime is installed in the water channel (see Japanese Patent Laid-Open No. 48-53554).
[0003]
In addition, there is a material in which a porous ceramic contact material is fixed in the form of a dam so as to cross the river directly in the river channel (see JP-A-61-230787). In addition to this, there is one that is installed in the water of a river channel such that one end of a plate-like water treatment contact material is attached to the river bed, and a floating body is attached to the other end so that it stands up in the water. (See Japanese Utility Model Publication No. 7-43156). The contact material for water treatment is changed according to the water level by the floating body.
[0004]
[Problems to be solved by the invention]
However, it is necessary to arrange a sprinkler pipe and a water collecting pipe in the vacant land on the side of the river, which requires a lot of installation space. In recent years, vacant land has become roads and residential land, so there are places where the installation conditions match. It is becoming less and it may be difficult to secure the installation location.
On the other hand, in the case where the contact material for purification is installed in the water of the river channel, it becomes an obstacle to running water in the event of a flood. In addition, if the water treatment contact material stands in the water by the floating body, when the water flow is strong, for example, during flooding, the water treatment contact material is greatly inclined, but the falling material passes over it, and dust, rolling stones, etc. There is a risk that the contact material may be damaged or buried with sediment such as earth and sand, and the initial function may be impaired. Therefore, the maintenance cost becomes high.
[0005]
Therefore, the present invention provides a river purification apparatus in which a water treatment contact material is disposed at an effective location so as not to prevent a flow of running water without requiring a new installation space outside the river. For the purpose .
[0006]
[Means for Solving the Problems]
Purifier river according to the present invention, a contact filtration chamber in the basement of the riverbed reservoirs formed by installing a relief weir provided, inlet while opening the inlet of the contact filtration chamber on the upstream side water passage of said relief weir to attach the screen, attach the screen to the outlet while opening the outlet of the contact filtration chamber on the downstream side water passage of the relief weir, and wherein the housing a water treatment contact member to the contact filtration chamber.
In the river purification apparatus according to the present invention, in the above configuration, the inlet of the contact filtration chamber is provided in the upstream bed of the undulation weir, and the second undulation weir is connected to the inlet so as to close the inlet during the fall. It is provided on the immediately upstream side. Alternatively, the inlet of the contact filtration chamber is provided on the side wall of the reservoir.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The river purification apparatus according to the present invention forms a reservoir by an undulating weir , purifies by flowing water into a contact filtration chamber provided in the basement of the river bed using the reservoir water level, and downstream the water passing through the contact filtration chamber It is made to flow. There are undulation weirs that use a steel plate weir operated by a cylinder and pneumatic rubber weirs.
An inlet and an outlet are opened before and after the contact filtration chamber, and a screen is provided at each of the inlet and the outlet to prevent the water treatment contact material loaded therein from flowing out. In addition, the entrance is closed by the fall of the second undulation weir so as to prevent the inflow of water into the contact filtration chamber during a flood.
[0008]
【Example】
Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the two undulating weirs 2 and 3 provided on the downstream side and the upstream side of the river can freely rotate the steel plates 7 and 8 by the rotating shafts 5 and 6 attached to the river bed 4. The steel plates 7 and 8 are respectively driven up and down by a cylinder (not shown). Of course, the undulation weirs 2 and 3 may be rubber weirs. Further, since the river bed 4 has a terrain where the height difference can be taken, the downstream side of the undulation weirs 2 and 3 is lowered, and the river bed 4 immediately downstream of the undulation weir 3 on the upstream side has a contact filtration chamber 9 formed underground. The inlet 10 is opened, and the outlet 11 of the contact filtration chamber 9 is opened on the wall surface of the step portion of the river bed 4 on the downstream side of the undulating weir 2 on the downstream side.
[0009]
Screens 12 and 13 are provided at the inlet 10 and the outlet 11 of the contact filtration chamber 9, and a resinous cubic-shaped water treatment contact material 14 having a specific gravity smaller than that of water is accommodated inside the contact filtration chamber 9. . Further, a flow rate adjusting gate 15 is provided at the outlet 11, and an aeration pipe 16 is laid on the floor of the contact filtration chamber 9 and is connected to a blower 17 on the bank. Reference numeral 18 denotes a water level gauge.
[0010]
In purifier of the installed river as above, undulations weir 3 on the upstream side is always the upstream side in the sediment 19 is, thereby preventing a quicksand into purifier, during floods, the purification device and laid down It prevents sand from entering. The undulation weir 2 on the downstream side always stores water to form a reservoir, and slows the flow rate of the river 1 to support sedimentation of sediment suspended matter. The flow rate adjustment gate 15 is automatically adjusted by the measured value of the water level gauge 18, and when the flow rate is always small with respect to the change in the river flow rate, the opening degree of the flow rate adjustment gate 15 is reduced and the contact filtration chamber is obtained. Increase the stagnation time at 9 to increase the degree of purification. When the flow rate increases, the opening degree of the flow rate adjustment gate 15 is increased to prevent overflow from the undulation weir 2 on the downstream side.
[0011]
The water in the river 1 passes through the undulating weir 3 on the upstream side, reaches the water treatment contact material 14 in the contact filtration chamber 9 from the inlet 10, is purified while flowing down, and flows downstream from the outlet 11. At this time, floating substances such as dust do not enter the screen 12, and since the screens 12 and 13 are arranged at the entrance, the water treatment contact material 14 does not flow out by running water .
[0012]
Further, in the case of a small flood (the water level from the constant storage depth to the lodging water depth), the flow rate adjustment gate 15 is fully opened to purify the contact filtration chamber 9 with a large flow rate. However, since a large amount of earth and sand is contained in the water during a major flood, the flow rate adjustment gate 15 is fully closed so that water does not flow into the contact filtration chamber 9.
Moreover, when the undulation weir is a rubber weir, the blower of this equipment can be used for aeration, so that the equipment cost can be saved.
[0013]
The replacement of the water treatment contact material 14 will be described. When the screens 12 and 13 are removed and water is allowed to flow from the upstream to the contact filtration chamber 9, the cubic-shaped water treatment contact material 14 having a small specific gravity is washed away together with the water. Thereafter, the downstream screen 13 is fixed to the outlet 11, and the water treatment contact material 14 is introduced together with water from the inlet 10 , and the upstream screen 12 is fixed to the inlet 10 .
[0014]
Thus, by providing the purification device in the basement of the reservoir bed 4 formed by the undulating weir 2 on the downstream side, it is easy to secure the installation space, and water treatment is performed using the difference in water level between the upstream and downstream. The contact material 14 can be easily replaced. Compared to the conventional case, there is no fear of damage to the water treatment contact material 14 , and there is no hindrance to the cross section of the river.
[0015]
As shown in FIG. 3, when installing a purification device in a place where there is no level difference of the river bed 4, the recess 20 is accommodated when the two undulation weirs 2, 3 provided on the downstream side and the upstream side fall down, 20 is formed on the floor, the entrances 10 and 11 of the contact filtration chamber 9 are provided in the recesses 20 and 20, and the contact filtration chamber 9 is provided in the basement of the river bed 4. In this case, since the water level of the reservoirs by undulations weir 2 on the downstream side is higher than the downstream water level, the amount of water flowing through the contact filtration chamber 9 can be sufficiently ensured.
[0016]
The purification device shown in FIGS. 4 and 5 is formed by forming the inlet 22 of the contact filtration chamber 9 on the side wall 21 upstream of the undulating weir 2, and eliminates the undulating dam 3 that blocks the inlet 10 shown in FIGS. It is a thing. The underground contact filtration chamber 9 below provided the relief weir 2, the outlet 11 to the step portion of the downstream bed 4 undulations weir 2 is formed. In this purification apparatus, since one undulation weir 2 is operated, operation is simpler than the purification apparatus shown in FIGS.
[0017]
【The invention's effect】
Since the present invention is configured as described above, since a contact filtration chamber is provided in the basement of the reservoir bed formed by the undulating weir even if there is no vacant land on the side of the river, it is easy to secure the installation space, Since the flowing water is guided to the contact filtration chamber and brought into contact with the water treatment contact material by utilizing the difference between the upstream and downstream water levels, the efficiency is also good. Moreover, the replacement | exchange work of the contact material for water treatment becomes easy using this flowing water .
Moreover, since it is not provided in water as compared with the conventional purification device, the water treatment contact material is not damaged by the flowing-down material, and the flow-down cross section of the river can be used widely and effectively.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a purification device according to an embodiment of the present invention.
FIG. 2 is a front view of the apparatus shown in FIG.
FIG. 3 is a side sectional view showing a configuration of the apparatus shown in FIG.
FIG. 4 is a side sectional view of a purification device according to another embodiment.
FIG. 5 is a front view of the apparatus shown in FIG. 4;
[Explanation of symbols]
2,3 sidewall undulation weir 4 bed 9 contact filtration chamber 10 inlet 11 outlet 12, 13 screen 14 for water treatment contact device 21 Reservoir

Claims (3)

Contact filtration chamber in the basement of the riverbed formed by installing a relief weir reservoir provided, attach the screen to the inlet while opening the inlet of the contact filtration chamber on the upstream side water passage of the relief weir, downstream of said relief weir Attach the screen outlet while opening the outlet of the contact filtration chamber on the side water passage, purifier river, characterized in that accommodating the water treatment contact member to the contact filtration chamber. The inlet of the contact filtration chamber upstream bed of said relief weir provided, claims a second undulating weir, characterized in that provided immediately upstream side of the inlet to close the inlet when lodging The river purification apparatus according to 1. Purifier river according to claim 1, characterized in that a said inlet of said contact filtration chamber on the side wall of the reservoir.

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