JPH07275604A - Coagulant mixing and stirring apparatus - Google Patents

Abstract

PURPOSE:To mix a coagulant with filthy water in an amount corresponding to the amount of the filthy water to be treated while saving the running cost. CONSTITUTION:This coagulant mixing and stirring apparatus is provided with a water wheel 19 driven by water flow of the filthy water to be treated and a hopper 21 which is installed in the upper stream side or the upper side of the down stream side of the water flow of the water wheel, and has a coagulant supplying tool 20 driven by the water wheel 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coagulant mixing apparatus, and more particularly to a coagulant mixing and stirring apparatus capable of saving running costs and mixing a quantity of coagulating agent corresponding to the amount of treated water with polluted water. Is.

[0002]

2. Description of the Related Art Conventionally, in the process of treating polluted water, after removing coarse dust in the polluted water which is the water to be treated as a pretreatment, a coagulant is mixed with the polluted water to remove fine dust in the polluted water. The purified water is obtained by coagulating and filtering this aggregate with a net or precipitating to separate it from water.

Since it is preferable to continuously supply the coagulant in accordance with the flow of polluted water, for example, a hopper having a coagulant supply tool such as a screw feeder driven by a motor, a roll feeder, a flap, etc. Placed on the upper side of the flow.

Further, it is preferable that the amount of the coagulant mixed with the polluted water is increased / decreased in accordance with the increase / decrease of the flow rate of the polluted water. A control device for controlling the operation of the drive device according to the detection result of the detection device is required.

[0005]

As described above, the conventional coagulant mixing device requires the hopper having the coagulant supply tool and the driving device such as a motor for driving the hopper, so that the driving device There is a problem that an energy source such as electric power, which is a drive source, is required, and running cost becomes high.

Further, when the amount of the coagulant mixed with the polluted water is increased / decreased in accordance with the increase / decrease in the flow rate of the polluted water, the flow rate detection device and the control device are required as described above. There is a problem that the cost becomes high, an energy source consumed for control is required, and the running cost becomes higher.

Further, the coagulant permeated by the contaminated water from the hopper into the contaminated water flow is, so to speak, in a state of being dripped.
Dispersion efficiency in polluted water is low, and it is necessary to drop an excessive amount of coagulant into polluted water or to specially provide a stirrer for stirring polluted water mixed with coagulant.

The present invention has been made in view of the above circumstances, and provides a coagulant mixing device capable of saving an energy source and mixing an amount of coagulant corresponding to the amount of treated water with polluted water. The purpose is to do.

[0009]

In order to achieve the above-mentioned object, a coagulant mixing device according to the present invention has a turbine driven by a water stream of treated water and an upstream or downstream side of the turbine of the water stream. And a hopper arranged on the upper side and having a coagulant supply tool driven by the water turbine.

[0010]

[Operation] Since the water turbine is driven by the water flow of the water to be treated and the coagulant supply tool is driven by this water wheel, no special energy source such as electric power for driving the coagulant supply tool is required.

Further, since the power of the water flow of the water to be treated drives the water wheel increases / decreases in accordance with the increase / decrease in the water amount, the operation of the coagulant supply tool increases / decreases in accordance with the increase / decrease in the water amount, and the supply amount of the coagulant Will be increased or decreased according to the increase or decrease in water volume.

Further, since the polluted water or the semi-treated water mixed with the coagulant can be stirred by providing the water wheel, the coagulant can be prepared without providing a special stirring device for stirring the polluted water or the coagulant. The dispersion efficiency can be increased.

That is, when a water turbine is provided on the downstream side of the hopper, the polluted water (semi-treated water) on which the coagulant has been dropped.
When the water wheel hits the water wheel, the flow is agitated, the dispersion efficiency of the coagulant is enhanced, and when a water wheel is installed upstream of the hopper, the flow of polluted water is applied to the water wheel to Since the coagulant is dropped at the place where the flow is stirred and disturbed, the dispersion efficiency of the coagulant is enhanced.

[0014]

Embodiments of the present invention will now be specifically described with reference to the drawings. Prior to this, the plan view of FIG. 3 and FIG.
A polluted water treatment plant to which an embodiment of the present invention is applied will be described based on the sectional view of FIG.

Every time the polluted water passes through the net 2 at the pretreatment site 1, coarse dust is removed, and thereafter, the polluted water flows to the first treatment site 3 to mix and stir the coagulant provided in the first treatment site 3. The coagulant is mixed by the processing device 4 and stirred.

The polluted water (semi-treated water) mixed with the coagulant is agglomerated by the coagulant's ability to aggregate the pollutants 17 in the polluted water while passing through the glymat 6 of the second treated land 5, and contains the aggregated pollutants. The semi-treated water further flows to the third treated land 7,
The waste 17 picked up from the semi-treated water by the net conveyor 8 provided in the third treated area 7 is the belt conveyor 9
It is transferred to the and is thrown into the waste container 11.

The semi-processed water from which the filth 17 has been removed flows into the reservoir 10 and is then introduced into the fourth treated site 13 defined by the reservoir 10 and the felt net 12. This 4th
The treated land 13 is separated by the felt net 12.
It consists of a letter-shaped natural subsidence land 14 and a finishing land 15, and while the water slowly flows from the reservoir 10 to the natural subsidence area 14, the filth 16 agglomerated into a small size that cannot be removed by the net conveyor 8 contained in the semi-treated water. It spontaneously settles and is separated from the semi-treated water.

The natural sediment 16 separated from the semi-treated water in the reservoir 10 and the natural sedimentation site 14 is stopped periodically or at any time after stopping the flow of polluted water and semi-treated water. It is taken out of the natural sink 14.

After the small agglomerates 16 have been settled,
It is filtered by a needle felt (not shown) in the finishing place 15 and becomes fresh water, which is discharged to rivers, lakes, oceans and the like. The coagulant mixing / stirring device 4 is according to one embodiment of the present invention, and as shown in the vertical side view of FIG. 1, a water conduit 18 through which polluted water flows, and a horizontal shaft at a downstream portion of the water conduit 18. A water turbine 19 rotatably supported around the center, and this water turbine 1
And a hopper 21 having a coagulant supply tool 20 composed of a flapper (20a) that is opened and closed by a switch 9.

The hopper 21 has a main body 22 having a vertical axis and a rectangular shape for storing a coagulant, and occupies about one-third of the upstream side in plan view in the lower part thereof, and is inclined downward on the downstream side. A hinge 25 is provided on the downstream side wall 24 of the main body 22 so that the base end portion of the coagulant supply tool 20 comes into contact with and separates from the lower end edge of the inclined bottom plate 23. It is swingably connected via.

The lower surface of the middle portion of the coagulant supply tool 20 is supported by a cam shaft 26, and the cam shaft 26 is, for example, a chain,
It is interlocked with the central shaft 28 of the water turbine 19 via a transmission tool 27 such as a belt.

As shown in the vertical sectional front views of FIGS. 1 and 2, the water wheel 19 includes a plurality of (e.g., eight) water scraper plates 29 radially fixed to the central shaft 28, and each water scraper plate 29. And a side plate 30 that connects each side edge in the width direction of the water conduit, and is rotated by receiving the flow of polluted water flowing in the water conduit 18 on the water scraper plate 29.

The water wheel 19 may be a top-up type or a bottom-up type, but here, a chest-mounted water wheel 19 which can utilize the water pressure in the flow direction of the water flow and the falling energy of the water is used. I am using.

The rotation of the water wheel 19 and the transmission 2
7 is transmitted to the cam shaft 26, and the rotation of the cam shaft 26 causes the coagulant supply tool 20 to swing up and down, and the coagulant in the main body 22 is swung out.

The coagulant is not particularly limited, but as described in, for example, Japanese Patent Application Laid-Open No. 2-99185, at least one of a soluble aluminum salt and a soluble iron salt, and an arbitrary one. It is advantageous to shorten the processing time to use one containing an amount of an alkali metal carbonate and an arbitrary amount of an inorganic drug.

As the inorganic agent of the coagulant, a calcium compound or a composition containing a calcium compound, coal incineration ash, blast furnace slag, a solubilizer such as Glauber's salt and fine rock stone, and a mixture of one or more of these are used. It is also possible to add an organic water treatment agent together with this inorganic agent.

By rocking the coagulant supply tool 20 from the main body 22, the space between the coagulant supply tool 20 and the inclined bottom plate 23 is opened and closed, and each time the coagulant supply tool 20 is opened, the coagulant is dropped on the contaminated water flowing therebelow. On the downstream side, it is agitated by hitting the water scraper plate 29 of the water wheel 19, and is efficiently dispersed in the turbid water.

Therefore, no special energy source such as electric power for driving the coagulant supply tool 20 is required.
Energy sources can be saved and running costs can be reduced.

Further, the force of driving the water wheel 19 by the water flow of the polluted water increases / decreases in accordance with the increase / decrease in the amount of water.
The operation of 0 is increased / decreased in accordance with the increase / decrease in the amount of water, and the supply amount of the coagulant is increased / decreased in accordance with the increase / decrease in the amount of polluted water.

Moreover, after dropping the coagulant into the polluted water,
When the flow of polluted water hits the water wheel 19, the flow is agitated and the dispersion efficiency of the coagulant is enhanced, so that the amount of the coagulant used can be reduced and the running cost can be further reduced.

In another embodiment of the present invention shown in the vertical sectional side view of FIG. 5, a hopper 31 has a main body 32 having a cylindrical shape with a vertical axis and a downward inclination from the upstream side of the lower part of the main body 32 toward the central part. An upstream side inclined bottom plate 33, an upstream side inclined bottom plate 32 which inclines downward from the downstream side of the lower part of the main body 32 toward the central part,
A coagulant supply tool 20 including a screw feeder (20b) facing a supply port 35 opening between both lower end portions of the upstream and downstream inclined bottom plates 33 and 34 is provided. It is linked to the turbine.

An upper end portion of the upstream side inclined bottom plate 31 is swingably supported by a main body 32 by a hinge 36, and an adjusting screw 37 supported by an upstream side portion of the main body 32 so as to be able to advance and retract.
By rotating the handle 38 with the handle 38, the inclination angle of the upstream side inclined bottom plate 33 can be adjusted to adjust the opening amount of the supply port 35.

In order to prevent the coagulant from accumulating on the coagulant supply tool 20, a brush 39 is provided at the lower end of the upstream side inclined bottom plate 31 so as to be in sliding contact with the coagulant supply tool 20. Other configurations, operations and effects of this embodiment are the same as those of the above-mentioned one embodiment, and therefore their explanation is omitted to avoid duplication.

In another embodiment of the present invention shown in the vertical side view of FIG. 6 and the plan view of FIG. 7, the polluted water is applied from the bottom of the polluted water tank 40 by the main nozzle 41 to the water wheel 42 in a downward manner. In addition, when the water level of the polluted water tank 40 is above a certain level, the residual water in the polluted water tank 40 is discharged from the sub-nozzle 43 through the water wheel 4.
It is designed so that it can be applied to 2 in a hanging manner.

The hopper 45 provided on the upper side of the water conduit 44 on the downstream side of the water turbine 42 is a small hopper 46 on the lower side.
And a large hopper 47 that is attached and detached on the upper side of the
A supply port 47 is opened at the center of the lower part of the small hopper 46.

The coagulant on the inner bottom of the small hopper 46 is collected at the supply port 48 by the coagulant supply tool 20 composed of a screw feeder (20b) and is dropped from the supply port 48 to the lower water conduit 44. There is.

The small hopper 47 is provided with an oscillating device 49 for preventing the bridging phenomenon of the coagulant. Further, a manual operation type or a remote operation type continuously variable transmission 50 is interposed in a transmission device 49 for interlocking the water wheel 42 and the coagulant agent 20, and the operation of the coagulant agent 20 with respect to the rotation speed of the water wheel 42. The speed can be changed arbitrarily.

In this embodiment, the flow of polluted water is controlled by the water turbine 42.
Since the coagulant is dropped on the place where the flow of polluted water is agitated and disturbed, the dispersion efficiency of the coagulant is enhanced. Other configurations, operations and effects of this embodiment are the same as those of the above-mentioned one embodiment, and therefore their explanation is omitted to avoid duplication.

[0039]

As described above, the coagulant mixing / stirring device of the present invention is disposed on the water wheel driven by the water flow of the water to be treated and on the upstream side or the upstream side of the water wheel of the water flow. Since a hopper having a coagulant supply tool driven by this water turbine is provided, a special energy source for driving the coagulant supply tool such as electric power is not required, and running costs can be reduced, The effect that the amount of coagulant corresponding to the amount of treated water can be mixed with the polluted water is obtained.

Furthermore, since the dispersion efficiency of the coagulant can be increased by stirring the polluted water or the semi-treated water with the water wheel, the amount of the coagulant used can be reduced and the running cost can be further reduced. is there.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of an embodiment of the present invention.

FIG. 3 is a plan view of a polluted water treatment plant to which an embodiment of the present invention is applied.

FIG. 4 is a sectional view of a polluted water treatment plant to which an embodiment of the present invention is applied.

FIG. 5 is a vertical sectional side view of a main part of another embodiment of the present invention.

FIG. 6 is a vertical cross-sectional side view of another embodiment of the present invention.

FIG. 7 is a plan view of another embodiment of the present invention.

[Explanation of symbols]

 19 Turbine 20 Coagulant Supply Tool 20a Flapper 20b Screw Feeder 21 Hopper 31 Hopper 42 Turbine 45 Hopper

Claims (1)

[Claims] 1. A water turbine driven by a water flow of water to be treated, and a hopper having a coagulant supply tool which is arranged upstream or downstream of the water turbine of the water flow and is driven by the water turbine. A coagulant mixing and stirring device characterized by the above.