JP2002119804A - Turbid substance removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turbid substance removing device which has a filler (filter medium) packed in a column so as to be in a dense state when raw water is passed and to be in a coarse state when cleaning water is passed and is improved so that the collection and release of the turbid substance are more efficiently performed by the filler. SOLUTION: In the turbid substance removing device, where the raw water is passed in downward flow form and the cleaning water is passed in upward flow form, the filler (4a) capable of forming the dense state by being pressed by a lower supporting body (2) when the raw water is passed and forming the coarse state by releasing the dense state when the cleaning water is passed, is contained between supporting bodies (2) and (3) arranged respectively upper and lower inside the column (1) and the inside diameter of the column (1) is gradually increased toward the top part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a turbidity removing device.

[0002]

2. Description of the Related Art As a device for removing suspended solids (turbidity) in raw water, for example, a lower support is pressed between supports arranged vertically above and below the inside of a tower to form a dense state when flowing raw water, and It is effective to use a turbidity removing device that contains a filler capable of releasing the dense state and forming a coarse state when the washing water flows.

[0003] In a preferred embodiment of the above turbidity removing device, the support is constituted by a perforated plate, and the filler is moored to the lower perforated plate and settles when the raw water flows and rises when the washing water flows. It is composed of a long filler.

[0004] In the above turbidity removing device, raw water is passed in a downward flow (downflow) manner, and washing water is passed in an upward flow (upflow) manner. Then, the long-shaped filler material sinks on the lower dish when flowing the raw water, and exhibits a dense state, and floats from the lower dish when flowing the washing water, and assumes a coarse state. Due to the dense state and the coarse state of the filler, trapping and discharging of the turbid matter by the filler are efficiently performed. In addition, the sedimentation of the long-shaped filler is performed by the action of the water pressure and / or the weight of the filler.

[0005] In the same manner as described above, the upper support is pressed between the supports arranged above and below inside the tower to form a dense state when the raw water flows, and the dense state is released when the wash water flows. A turbidity removing device containing a filler forming a state is also effective. In this turbidity removing device, raw water is passed in an upward flow type, and washing water is passed in a downward flow type.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a turbidity in which a packing material (filter material) is accommodated in a tower so as to exhibit a dense state when passing raw water and a rough state when passing washing water. It is an object of the present invention to provide a turbidity removing apparatus which is improved so that turbidity is trapped and discharged by a filler more efficiently.

[0007]

That is, the first aspect of the present invention is as follows.
The gist of the present invention is a turbidity removing device in which raw water is passed in a downward flow format and washing water is passed in an upward flow format, wherein raw water is passed between supports arranged above and below the tower. Sometimes it is pressed against the lower support to form a dense state, and when the washing water flows, it contains a packing material that can release the dense state to form a coarse state, and the inner diameter of the tower gradually increases toward the top. A turbidity removing device characterized by being made large.

A second aspect of the present invention is a turbidity removing apparatus in which raw water is passed in an upward flow mode and washing water is passed in a downward flow mode. When the raw water is passed between the disposed supports, the upper support is pressed to form a dense state, and when the washing water is passed, the dense state is released and the packing material that forms a coarse state is accommodated therein, and the tower is formed. Wherein the inner diameter of the turbidity removing device is gradually increased toward the bottom.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory view of a preferred example of a turbidity removing device according to a first aspect of the present invention, and FIG. 2 is an explanatory view of a preferred example of a turbidity removing apparatus according to a second aspect of the present invention. (A) of each figure is an explanatory view of the raw water flow state,
(B) is an explanatory view of a washing water flowing state.

First, a turbidity removing device according to a first aspect of the present invention will be described. This turbidity removing device is a turbidity removing device in which raw water is passed in a downward flow type and washing water is passed in an upward flow type. Therefore, the raw water is passed through the pipe (51) provided at the top and taken out as treated water from the pipe (52) provided at the bottom (see FIG. 1 (a)), and the washing water is provided at the bottom. Water is passed through the pipe (52) and discharged from the pipe (51) provided at the top (see FIG. 1 (b)).

In the turbidity removing apparatus shown in FIG. 1, perforated plates (2) and (3) are arranged above and below the inside of a tower (1). A filler (4a) which sinks when flowing water and floats when washing water flows is moored.

The material and the specific shape of the filler (4a) are not particularly limited as long as they have the above-mentioned functions. For example, a sheet member, a net member, a string member of a synthetic resin having an appropriate specific gravity, these members, A member around which a small thread member, a loop member, a spherical member, or the like made of synthetic fiber is densely wrapped is cited. As the synthetic resin, polyvinyl chloride, nylon, polypropylene, polyethylene and the like are used.

The filler (4a) is accommodated in the space between the perforated plates (2) and (3) in order to exhibit the above-described settling and floating function. The storage amount of the filler (4a) is set to 10 to 60% (preferably 30 to 40%) of the storage space as a value in a settling state when the raw water flows.

In the turbidity removing apparatus shown in FIG. 1, it is important that the inner diameter of the tower (1) is gradually increased toward the top. With such a diameter-expanding configuration, the floating of the filler (4a) at the time of washing water flow is performed in the space portion whose diameter is gradually increased, so that the filler (4a) exhibits a further enhanced coarse state and is turbid. Is more efficiently discharged. On the other hand, it is possible to further increase the density of the filler (4a) during the passage of the raw water, and the trapping of turbid matter is performed more efficiently. The degree of the diameter expansion of the tower (1) is appropriately determined in consideration of the above-described effects, and is defined as a ratio of the maximum diameter at which the perforated plate (2) is located to the minimum diameter at which the perforated plate (3) is located. If you do, usually 1.1-2.0,
Preferably it is set to 1.4 to 1.8. By the way, eye plate (3)
Is usually 50-360cm, eye plate (2)
The length (height) to ~ (3) is usually 100-450cm
The ratio of the height to the minimum diameter is usually 1.2 or more.

The turbidity removing device shown in FIG. 1 is used by repeating the following raw water treatment operation and washing operation.

In the raw water treatment operation (FIG. 1A),
Only the valves (61) and (62) are open. And the raw water containing turbidity is supplied from the valve (61) into the tower (1) via the pipe (51). At this time (when the raw water is passed), the filler (4a) is settled on the lower plate (3) and exhibits a dense state. Therefore, the suspended matter entrained in the raw water is captured by the filler (4a). The treated water containing no turbidity is supplied to the valve (6) via the pipe (52).
2).

In the case of the turbid removing device of the present invention shown in FIG.
Since the inner diameter of the tower (1) is gradually reduced toward the bottom, the dense state of the filler (4a) can be further increased as compared with a turbidity removing apparatus using a tower of the same diameter, and the turbidity can be increased. Quality capture is more efficient. In addition, the filler (4
When the dense state of a) is insufficient, it can be dealt with by recycling the treated water. That is, the valve (62)
By supplying the treated water taken out of the column again from the valve (61) into the tower (1) at a high flow rate and recycling the same, the dense state of the filler (4a) can be effectively formed. Then, when the supply pressure of the raw water increases and the turbidity removing capability reaches the limit, the operation is switched to the next cleaning operation.

In the cleaning operation (FIG. 1 (b)), the valves (61) and (6) which were open during the raw water treatment operation were used.
2) is closed. Wash water is supplied from the valve (64) to the tower (1) via the pipe (52). At this time (when the washing water is passed), the filler (4a) floats in the tower (1), but since the inner diameter of the tower (1) is gradually increased toward the top, the same diameter tower is used. As compared with the turbidity removing device, the coarse state of the filler (4a) can be further increased, and the turbidity can be discharged more efficiently. Wash water containing turbidity is taken out of the valve (65) via the pipe (51).

The above-mentioned washing operation can be performed more effectively by supplying air into the tower (1) and bubbling. Such air is supplied from the valve (63) into the tower (1) via the pipe (53). And
The bubbling causes the filler (4a) to vibrate, thereby facilitating the separation of the turbidity attached to the filler (4a).

Next, a turbidity removing apparatus according to a second aspect of the present invention will be described. This turbidity removing device is a turbidity removing device in which raw water is passed in an upward flow type and washing water is passed in a downward flow type. Therefore, the raw water is passed through the pipe (51) provided at the bottom and taken out as treated water from the pipe (52) provided at the top (see FIG. 2 (a)), and the washing water is provided at the top. Water is passed through the pipe (52) and discharged from the pipe (51) provided at the bottom (see FIG. 2 (b)).

In the turbidity removing apparatus shown in FIG. 2, perforated plates (3) and (2) are arranged above and below the inside of the tower (1), and the perforated plate (3) on the upper side has a long shape and is provided with raw water. A filler (4b) which floats when flowing water and sinks when washing water flows is moored. In short, the turbidity removal device shown in FIG. 2 has the same structure as that of the turbidity removal device shown in FIG. It is the same as the removal device in principle. Therefore, the specific configuration and usage can be understood based on the above description.

In the turbidity removing apparatus according to a preferred embodiment of the present invention illustrated in FIGS. 1 and 2, the support is constituted by a perforated plate, and the filler is constituted by an elongated filler having a predetermined function. Have been. However, the support and the filler in the turbidity removal device of the present invention are not limited to the above types. For example, in the case of the present invention according to the first aspect, the filler is pressed by the lower support during the passage of raw water to form a dense state, and is released during the passage of washing water to release the dense state to form a coarse state. As long as the filler is obtainable, and in the case of the present invention according to the second aspect, it is pressed by the upper support to form a dense state when the raw water flows, and releases the dense state when the washing water flows to release the coarse state. As long as the filler to be formed, a filler other than a long shape, for example,
A marimo-like ball-shaped structure formed by curling bundle-shaped crimped fibers with its substantially central portion as a nucleus can be used by adjusting the specific gravity to an appropriate value. As the support, a lattice member, a net member, and the like can be appropriately selected and used according to the type of the filler used.

[0023]

According to the present invention described above, there is provided an improved turbidity removing apparatus which employs a simple structure to more efficiently capture and discharge turbidity by a filler. The industrial value of the present invention is remarkable.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a preferred example of a turbidity removing device according to a first aspect of the present invention.

FIG. 2 is an explanatory view of a preferred example of a turbidity removing device according to a second aspect of the present invention.

[Explanation of symbols]

 1: Tower 2, 3: Plate 4a, 4b: Filler of long shape 51-53: Piping 61-64: Valve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 29/08 540A 29/38 510B 520A

Claims (4)

[Claims] 1. A turbidity removing apparatus in which raw water is passed in a downward flow format and washing water is passed in an upward flow format, wherein raw water flows between supports arranged vertically above and below a tower. In the case of water, the lower support is pressed to form a dense state, and in the case of washing water, the packing contains a filler capable of releasing the dense state and forming a coarse state, and the inner diameter of the tower is directed toward the top. A turbidity removing device characterized by being gradually increased. 2. The support is constituted by a perforated plate, and the filler is anchored to a lower perforated plate, and is constituted by a long-shaped filler capable of sinking when flowing raw water and floating when washing water flows. The turbidity removal device according to claim 1. 3. An apparatus for removing turbidity through which raw water is passed in an upward flow mode and washing water is passed in a downward flow mode, wherein the raw water flow is passed between supports arranged vertically above and below the inside of the tower. In the case of water, it is pressed against the upper support to form a dense state, and when the washing water is supplied, the dense state is released and the packing material which forms the coarse state is housed,
The turbidity removing device is characterized in that the inner diameter of the tower is gradually increased toward the bottom. 4. The support is constituted by a perforated plate, and the filler is anchored to the upper perforated plate and is constituted by a long-shaped filler capable of floating when raw water flows and sinking when washing water flows. The turbidity removing device according to claim 3.