JPH07265848A - Vertical type water treating device - Google Patents

Abstract

PURPOSE:To obtain a water treating device which does not require maintenance, is.low in water treatment cost and brings raw water and treating agent into uniform contact with each other by constituting this device in such a manner that water is dispersed by using the walling energy of water, thereby generating turbulence and stirring the water. CONSTITUTION:A raw water introducing port 2 is formed at the top end of a cylindrical water treating tank 1 and rotary vanes 4 disposed in this introducing port 2 are rotated by gravity of the introduced water, by which the raw water is dispersed in the tank 1. A shunt device 5 of a circular conical shape is fixed below the introducing port 2 so that the raw water is dropped from the inner wall side of the tank 1. The outer peripheral part of this shunt device 5 is formed with many annular projecting lines 6, by which the raw water is made into turbulence and the stirring effect is further increased. The water falling downward ascends by flowing under a cylindrical weir 9 so as to be led out of a discharge port 12. Plural pieces of such water treating devices are laminated and connected to attain the uniform contact stirring of the raw water with the treating material from an introducing pipe 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment device mainly used for final treatment of wastewater such as industrial wastewater, and more specifically, it is not a mechanical stirring but a natural waterflow utilizing gravity. The present invention relates to a water treatment device adapted to treat water.

[0002]

2. Description of the Related Art Conventionally, in the treatment of industrial wastewater and the like, a flocculant is added to form flocs, and after the flocs are separated,
They were discarded after neutralizing as necessary or removing harmful metals such as mercury. Then, in order to make the sewage and the chemical to be treated evenly contact with each other, mechanical agitation such as an underwater mixer is used. However, since the sewage often contains an acid or the like that is highly corrosive to metals, the stirrer may malfunction and the sewage treatment may stop. As described above, since the agitator sometimes breaks down, maintenance is inevitably required, which causes a problem of increasing the cost of sewage treatment.

[0003]

The present invention has been made paying attention to such a point, and the raw water and the treating agent can be treated without using a mechanical agitator which may be damaged by sewage. An object of the present invention is to provide a water treatment device capable of uniformly contacting and stirring.

[0004]

Means for Solving the Problems The constitution of the present invention in accordance with the above object is to receive raw water dropped from an upper inlet and to disperse the water by gravity of the raw water, and to disperse the raw water dropped and dispersed. A water treatment apparatus including a tank having a weir that rises from the lower side to the upper side by water pressure, a discharge port that drops the raised raw water downward, and an inlet pipe for a treatment agent that treats the raw water located in the tank It is characterized in that a plurality of are laminated. In short, the gist of the present invention is to disperse water by utilizing the falling energy of water and to stir so as to generate a turbulent flow so that the raw water and the treating agent can be brought into uniform contact with each other. Is.

[0005]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a cross-sectional view showing an embodiment of the present invention, in which an inlet 2 for raw water is formed at the upper end of a cylindrical water treatment tank 1, and a pipe 3 for introducing raw water is provided at the inlet 2. It can be fitted. Inside the inlet 2, a rotary blade 4
Is attached and rotated by gravity of the raw water introduced from the pipe 3 to disperse the raw water in the tank 1.
The rotary vane 4 may be, for example, a water turbine as shown in FIGS. 7 and 8 as long as it rotates by the force of falling water. Instead of the rotary blades 4, for example, three arc-shaped plate bodies are fixed at equal intervals at the boundary between the inlet 2 and the tank 1 or in the inlet 2, or the rotary blades 4
The introduced water may be dispersed in the tank 1 by fixing the blade having the same shape as the above.

Below the inlet 2, a conical flow divider 5 is provided.
Is fixed. The raw water introduced from the inlet 2 hits the flow divider 5 and drops downward from the side wall of the tank 1. As shown in FIG. 3, a large number of ring-shaped ridges 6 are formed on the outer peripheral portion of the flow distributor 5.
The ridge 6 may be formed in a circular cross section, a semicircle, a quadrangle, or the like. Further, it does not necessarily have to be a convex stripe and may be a convex projection. The introduced water becomes a turbulent flow due to the ridges 6, further increasing the stirring effect. Shunt 5
As shown in FIGS. 5 and 6, it is also possible to fix a large number of blades 7 on the outer circumference of the conical flow distributor 5 and to introduce the introduced water to the blades 7 to rotate the flow distributor 5. it can.

In the embodiment shown in FIGS. 5 and 6, the shunt 5
The rotary shaft 8 is rotatably fitted and inserted in the center of the rotary shaft 8.
Is fixed to the weir 9 via a plate (not shown). The flow diverter 5 is formed in a sloping shape, and if water is allowed to drop downward, the shape thereof is not particularly limited, but it is preferable that the diverter 5 has a substantially triangular vertical cross section. Also,
If the water is dispersed by utilizing gravity, the flow divider 5 as described above is not always necessary. For example 7 and FIG.
As shown in FIG. 1, the rotating shaft 1 is attached to the shaft 10 fixed to the tank 1.
1 is inserted into the rotary shaft 11, and a large number of arcuate rotary blades 1 are attached to the rotary shaft 11.
It is also possible to use a water turbine constituted by fixing 2 together. In this case, the upper end of the weir 9 should be closed.

As described above, the stirring effect is improved by rotating the flow divider 5 or by using the flow divider 5 as a water wheel, so these may be appropriately selected according to the purpose of water treatment. Further, when the flow divider 5 can sufficiently obtain the stirring effect, it is not necessary to provide the inlet 2 with the rotary blade 4 or a member having a similar function. A cylindrical weir 9 is fixed to the tank 1 via a connecting piece (not shown) near the lower part of the flow distributor 5. The water that has dropped downward passes through the weir 9 and rises, and is introduced from the outlet 12 into the tank 1 connected downward. The upper tank and the lower tank are connected by a discharge port 12 formed in a concave shape on the bottom of the upper tank.
Then, it is performed by fitting the inlet 2 formed at the upper end of the lower tank. In this way, a desired number of water treatment devices are sequentially connected, and as shown in FIG.

An inlet of a treatment agent introducing pipe 13 for treating raw water is located near and above the outlet 12. The treating agent introducing pipe 13 does not necessarily have to be at this position, but in this embodiment, the rotary blade 4 is provided below the introducing pipe 13.
When the treatment agent is introduced from this position, the stock solution and the treatment agent are effectively mixed. On the bottom side wall of the water treatment tank 1, a sensor for measuring the pH value of the stock solution
14 are provided. The position of the sensor 14 does not have to be this position in particular, but it is preferable that the position is set to a position somewhat before the processing agent introducing pipe 13.

[0010]

Next, a method of treating raw water using the above apparatus will be described with reference to FIG. Raw water whose pH value is alkaline by treating the sewage is pumped and introduced into the upper tank 1 from the inlet 2. The raw water introduced into the tank 1 is dispersed by the flow distributor 5, becomes a turbulent flow, and descends, and ascends through the weir 9. A neutralizing amount of an acid such as dilute sulfuric acid is introduced at a prescribed flow rate from the treatment agent introducing pipe 13 in accordance with the pH value detected by the sensor 11. The stock solution and the acid descend together from the outlet 12 and are sufficiently mixed by the rotary blade 4. The undiluted solution thus neutralized is introduced into the second-stage tank 1 from the above, similarly dispersed by the flow divider 5, and rises through the weir 9.

Since the sensor 11 may have a slightly acidic or alkaline pH value, a small amount of acid or alkali is introduced through the introducing pipe 10. in this way,
Two tanks are usually sufficient for neutralization. If the raw water contains substances such as harmful metals that should be removed, add chemicals that insolubilize harmful metals to the 1st to 3rd stages, and add to the 4th and 5th stages. It is better to neutralize in a tank. In the above-mentioned embodiment, the tank 1 is laminated in five stages, but this may be a plurality of stages, and the number of stages may be appropriately selected according to the purpose of use. Further, the shape of the tank is not limited to the cylindrical shape, and may be a shape such as a polygonal prism shape that matches the space. By stacking in multiple layers according to the present invention, different processing can be performed for each layer. In this case, a treatment agent and a sensor that match the treatment may be used. In this way, a plurality of types of water treatment can be collectively managed by the microcomputer device.

The bottom tank 15 is filled with sand and / or gravel 16. This bottom tank 15
Is for separating insoluble matter by filtration and discharging the filtrate from the outlet 17. The lowermost tank 15 is for filtering insoluble matter, so that it may be a normal filter. The apparatus according to the above-described embodiment is an example suitable for a case where insoluble matter is not generated much, and the apparatus of the present invention is suitable for a case where a large amount of insoluble matter is not generated. When the apparatus of the present invention is used when a large amount of insoluble matter is produced, it is preferable that the tank 15 at the bottom is a filter equipped with a filter and the insoluble matter is taken out from the filter and disposed of.

[0013]

[Effects] As described above, according to the present invention, since the stirring is carried out by utilizing the natural flow of water instead of mechanical stirring, there are few malfunctions and maintenance is unnecessary, so that the water treatment cost is reduced. In addition to being able to reduce the amount, it is possible to perform the pH treatment and the like in stages by performing the treatment in multiple stages, and it is possible to perform high-level treatment that eliminates waste or excess and deficiency of the treatment agent, and stacks vertically. Therefore, the water treatment can be performed in a small space, and a remarkable effect which cannot be seen in the conventional water treatment apparatus of this kind is exhibited.

[0014]

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line I-I of FIG.

FIG. 3 is a perspective view of the disperser of the present invention.

FIG. 4 is a sectional view showing an embodiment of the present invention.

FIG. 5 is a top view showing another example of the disperser of the present invention.

FIG. 6 is a side view of FIG.

FIG. 7 is a side view showing another example of the disperser of the present invention.

FIG. 8 is a vertical cross-sectional view of FIG.

[Explanation of symbols] 1 water treatment tank 2 inlet 4 rotating blade 5 flow divider 9 weir 12 outlet

Claims (9)

[Claims] 1. A means for receiving raw water dropped from an upper inlet to disperse the water by gravity of the raw water, a weir for raising the dispersed and dropped raw water upward from below by its water pressure, and a raised raw water. A vertical type characterized by stacking a plurality of water treatment devices each including a tank having a discharge port for dropping water and a pipe for introducing a treatment agent for treating raw water located in the tank. Water treatment equipment. 2. The vertical water treatment apparatus according to claim 1, wherein a sensor for inspecting the water quality of the raw water is provided in the tank. 3. The vertical water treatment apparatus according to claim 1, wherein the means for dispersing the water by gravity of the raw water is a disperser formed in a sloping shape toward the side portion of the tank. 4. The vertical water treatment apparatus according to claim 2, wherein the disperser is formed so that a vertical cross section has a substantially triangular shape, and a protrusion is formed on an outer peripheral surface. 5. The vertical water treatment apparatus according to claim 1, wherein a blade is fixed to the outer peripheral surface of the disperser, and the disperser is rotated by receiving the raw water dropped by the blade. 6. The vertical water treatment device according to claim 1, wherein the disperser is a water turbine. 7. The vertical water treatment apparatus according to claim 1, wherein the inlet for the raw water is provided with means for receiving the falling raw water and dispersing the water by gravity. 8. The vertical water treatment apparatus according to claim 7, wherein the means for dispersing the raw water by the gravity of the raw water, which is provided at the inlet for the raw water, is a rotary blade or a water wheel that rotates by the gravity of the raw water. 9. The water treatment device of another type, wherein the introduction port is formed in a convex shape on the upper end of the tank and the discharge port is formed in a concave shape on the bottom part of the tank, and is connected to the introduction port of one water treatment device to be connected. The vertical water treatment device according to claim 1, wherein the vertical type water treatment device is formed by sequentially stacking the discharge ports of the above ones in multiple stages.