JPH0739704A - Stirring, flocculating and dehydrating apparatus - Google Patents

Abstract

PURPOSE:To perform treatments from separation of sewage from a floc and discharge of a supernatant liquor in a single apparatus. CONSTITUTION:Treatments from stirring and flocculation, sedimentation and filtration by means of a screen 3 to discharging can be performed in a single apparatus by forming an opening part 6 on a side wall of a stirring and flocculation tank 1 and extending the screen 3 on the opening part 6 and constituting it freely switchable by means of a gate plate 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can add a flocculant to sewage such as sludge, muddy water, and industrial wastewater, coagulate and stir it, and separate the supernatant from the separated flocs and discharge the water with the same device. The present invention relates to a stirring and aggregating and dehydrating device that is made possible.

[0002]

2. Description of the Related Art Sewage treatment such as sludge generated by ground improvement work, sludge and muddy water in landfills, sludge and muddy water caused by construction work, and industrial wastewater from various factories is important today from the viewpoint of pollution prevention. Has been done. Conventionally, these sewage water has been formed by adding a flocculant to form flocs, sending the flocs to a sedimentation separation tank, and further sending the treated water in the upper part to a screen filtration tank for filtering and then discharging the water.

Therefore, many devices such as a settling / separation tank and a screen filtration tank are required from the coagulation-sedimentation to the discharge of the treated water. Therefore, the installation of such a treatment apparatus is vast. There was a problem that it required a site and required a huge capital investment.

[0004]

SUMMARY OF THE INVENTION The present invention has been made paying attention to such a point, and the steps from separation of waste water to flocs to discharge of the supernatant liquid are performed by a single device. It is an object of the present invention to provide a stirring coagulation dehydrator capable of performing the above.

[0005]

The structure of the present invention, which meets the above-mentioned object, has a stirring and aggregating tank in which a stirring blade is inserted and a drainage groove of a floc is formed at the lower end, and a side portion of the agitation and aggregating tank. A screen stretched over the formed opening, and a water collecting tube for collecting filtered water from the screen fixed outside the opening,
And a gate plate that opens and closes the opening located movably in the water collecting cylinder. In short, according to the present invention, a screen is stretched at the opening of the stirring and aggregating tank, and this is configured to be openable and closable by a gate plate, so that stirring and aggregating, settling separation, and filtering by a screen and discharging water. It is a gist that it is possible to perform up to a single device, a device for performing such a series of steps in a single device is not known at all in the past, such a The idea is completely unknown.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a top view showing an embodiment of the present invention, and FIG. 2 is a sectional view of FIG. The stirring and aggregating tank 1 is formed in a cylindrical shape having an open upper end and a flock drainage groove 7 formed at the lower end,
A stirring blade 2 is installed inside. A screen 3 is fixed to the opening 6 on the side of the stirring and aggregating tank 1. To secure the screen 3, attach the upper and lower ends of the screen 3 to
It is clamped and fixed by screen fixing plates 9 and 9 '.
Although a slight gap is formed between the screen 3 and the opening 6 in this embodiment, they may be in close contact with each other. Outside the opening 6 of the stirring coagulation tank, a water collecting cylinder 4 having an open upper end for collecting the water filtered by the screen 3
Are connected.

A gate for opening and closing the opening 6 is provided in the water collecting cylinder 4.
The toe plate 5 is movably fixed. Cylinders 8 and 8'are fixed to the upper and lower ends of the gate plate 5, and the cylinders 8 and 8'are left-right, front-rear or up-down as shown by arrows in the figure by a hydraulic device (not shown). In the direction
The opening 6 is opened and closed. The opening 6 is formed in a porous shape having a large number of elongated holes formed in the height direction, but may be formed in a wire mesh shape. However, if it is formed so as to be entirely opened, the screen is easily damaged by water pressure, which is not preferable. The treated water filtered by the screen 3 and collected in the water collecting cylinder 4 is discharged to the outside through the drain pipe 10 connected to the lower end of the water collecting cylinder 4.

In the above-described embodiment, the gate plate 5 is contacted with and separated from the opening 6 so as to open and close the opening 6, but this is not necessarily the case. . As shown in FIGS. 3 and 4, the opening 6 is opened and closed by sliding the gate plate 5 in the circumferential direction, or as shown in FIGS. 5 and 6, the gate plate 5 is opened. There is no problem even if the opening 5 is opened and closed by sliding 5 up and down. The screen 3 is not particularly limited, but it is preferable to use one that allows the supernatant to be filtered in a short time with coarse filtration accuracy.

[0009]

Next, the operation of the present invention shown in FIGS. 1 and 2 will be described. Muddy water, sludge, industrial wastewater, and other wastewater and coagulant,
The mixture is put into the stirring coagulation tank 1 and mixed with stirring. At this time, the gate plate 5 is pressed and sealed in the opening 6. Then, when the stirring is stopped and the mixture is allowed to stand for a certain period of time, the flocs settle down and separate from the supernatant liquid above. Then the cylinder
When 8, 8'is moved to the left in the figure and the gate plate 5 is pulled to open the opening 6, the supernatant liquid is filtered through the screen 3 and flows into the water collecting cylinder 4. The water is discharged to the outside from the drain pipe 10 at the lower end of the water collecting cylinder 4. The flocs remaining in the stirring and aggregating tank 1 may be taken out from the drainage groove 7, filled in a water-permeable bag, stacked, dehydrated by its own weight, and discarded.

[0010]

As described above, according to the present invention, it is possible to perform agitation and mixing of sewage and a coagulant, sedimentation and separation of flocs, and discharge of supernatant liquid all at once with a single simple device. Since the device is made compact, it does not take up a place to install the device and the installation cost is low, and it enables extremely efficient sewage treatment, which is an extremely innovative invention as a sewage treatment device. It is extremely large because it contributes to the processing problem.

[0011]

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a vertical sectional view of FIG.

FIG. 5 is a cross-sectional view showing another embodiment of the present invention.

FIG. 6 is a vertical sectional view of FIG.

[Explanation of symbols]

 1 Stirring / aggregating tank 2 Stirring blade 3 Screen 4 Water collecting cylinder 5 Gate plate 6 Opening

Claims (2)

[Claims] 1. A stirring and aggregating tank in which a stirring blade is installed and a drainage groove of a floc is formed at a lower end, and a screen stretched over an opening formed in a side portion of the stirring and aggregating tank, A stirring characterized by comprising a water collecting cylinder for collecting filtered water from a screen fixed to the outside of the opening, and a gate plate for opening and closing the opening located in the water collecting cylinder. Coagulation dehydrator. 2. The stirring coagulation dehydrator according to claim 1, wherein the opening is formed in a porous shape.