JPH0733656B2 - Solidification method for sludge layer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for solidifying a sludge layer by stirring and mixing a slurry solidifying material.

(Problems of the Invention and Features) The sludge layer is often composed of a lower sludge layer with a large amount of solid content and an upper sludge layer with a solid content in a floc form with a density almost close to that of water. Conventionally, since the whole sludge layer including the above-mentioned sludge layer was tried to be stirred and mixed at one time under the supply of the slurry solidifying material, a good treatment result could not be obtained.

An object of the present invention is to provide a construction method having a novel concept capable of improving the treatment effect of a sludge layer having a floating mud layer on the upper part thereof, and the structural features thereof are in the scope of claims. As described.

In the present invention, only the sludge layer below the sludge layer is agitated and mixed, but as a result, the entire sludge layer is solidified.

(Description by Drawings) In FIGS. 1 and 2 which are explanatory views of a first embodiment of the present invention, 1 is a sludge layer, 2 is a sludge layer, 3 is a sludge layer, 4 is a stirring and mixing section, 5 Is a treated layer, and 6 is an aqueous layer.

The horizontal axis type stirring and mixing processor 7 used in this embodiment is provided with two shield plates 8 and 9 on the upper portion thereof, and the gap between the shield plates 8 and 9 is approximately equal to the layer thickness of the sludge layer 2. Equally, the front end of this gap is open, the middle part (upper part of the stirring and mixing part 4) rises upward, and the rear end is closed. A skirt portion 10 extending along the surface of the treated layer 5 extends rearward from this rear end.

In this embodiment, the upper shielding plate 8 blocks the floating mud layer 2 and the water layer 6, and the lower shielding plate 9 blocks the floating mud layer 2 and the stirring / mixing unit 4, respectively. While moving the mixing processor 7 in the direction of arrow A, the mud taken into the gap between the shielding plates 8 and 9 is sucked by the pump 11 and put into the mixer 12, and the mud is used as a liquid in the mixer 12. Then, water is further added as needed to prepare a slurry solidifying material, and the slurry solidifying material is sent to a stirring and mixing section by a pump 13 to stir and mix the sludge layer 3.

In addition, in the figure, 14 is a drain pipe for allowing excess sludge to escape to the untreated side.

In the above-mentioned embodiment, the sludge is sucked above the stirring and mixing unit 4, but in the second embodiment shown in FIG. 3, the sludge is sucked in front of the stirring and mixing unit 4.

A shield plate 8'is provided on the upper part of the stirring and mixing processor 7'used in this embodiment. In this embodiment, the shield plate 8'provides a space between the sludge layer 2 and the water layer 6 and the sludge layer. With the layer 2 and the stirring / mixing unit 4 blocked, the same process as described above is performed.

In the figure, 15 is a rubber plate, 16 is an air chamber, 17 is a stirring blade,
Air is sent to the air chamber 16 and the rubber plate 15 is elastically brought into contact with the stirring blades 17 to prevent the sludge from escaping during stirring and mixing, thereby allowing good stirring and mixing.

(Effects of the Invention) The method of the present invention is as described above, in which the sludge on the upper part of the sludge layer is sucked, the sludge is utilized as a liquid component to prepare a slurry solidifying material, and this is supplied. Since only the sludge layer below the sludge layer is agitated and mixed, deterioration of the treatment effect due to the presence of the sludge layer is prevented, and as a result, the entire sludge layer including the sludge layer is solidified. You will be able to Further, according to the method of the present invention, the diffusion of the sludge layer is prevented and the generation of a bad odor is prevented, so that the pollution problem due to the construction does not occur.

[Brief description of drawings]

FIG. 1 is a general view for explaining the first embodiment of the present invention, FIG. 2 is a perspective view of the stirring and mixing processor part, and FIG. 3 is a general view for explaining the second embodiment of the present invention. 1 ... sludge layer, 2 ... sludge layer, 3 ... sludge layer, ....

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-50-9248 (JP, A) JP-A-53-128108 (JP, A)

Claims (1)

[Claims] 1. A method for solidifying a sludge layer by stirring and mixing a slurry solidifying material, wherein a horizontal axis type stirring and mixing processor having a shield plate of an appropriate length provided on the upper portion is moved along the sludge layer. While sucking the sludge in the sludge layer with the shielding plate blocking the sludge layer above the sludge layer and the water layer above it, and between the sludge layer and the agitation mixing section, respectively. A method for solidifying a sludge layer, which comprises supplying a slurry-like solidifying material produced by using this floating mud as a liquid component to a stirring and mixing section.