JPH019611Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sludge dewatering device that performs excessive dewatering of sludge by utilizing minute intervals between thin plates.

Conventionally, as a device for dewatering sewage sludge, human waste sludge, etc., a device has been proposed that combines a large number of thin plates, as shown in Japanese Patent Publication No. 55-9277, and discharges the filtrate from the gaps between them to dewater the sludge, etc. has been done.

However, since this device attaches a thin plate to the rotating shaft, the thin plate cannot be deeply engaged with the adjacent piece because the rotating shaft gets in the way. For this reason, the portions that do not engage are clogged with sludge, and the portions that are clogged with the shaft do not contribute to dewatering, making it impossible to carry out effective over-dehydration treatment.

Furthermore, in the conventional example, it was necessary to attach a large number of thin plates to each shaft, and the total number of thin plates per device was tens of thousands, making assembly very time-consuming.

The purpose of this invention is to eliminate the above-mentioned drawbacks, and to provide a sludge dewatering device that dewaters sludge and transports the sludge smoothly, does not cause clogging, and is easy to assemble.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of one embodiment, and FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1. In FIGS. 1 and 2, the dehydrator main body 1 includes a sludge supply port 2,
A liquid outlet 3 and a dehydrated cake outlet 4 are provided. Inside the dehydrator main body 1, a pair of bodies 5, 5 are arranged facing each other in parallel, and a sludge chamber 6 is communicated with the sludge supply port 2 and the dehydrated cake discharge port 4.
and a liquid chamber 7 communicating with the liquid discharge port 3. Here, the sludge chamber 6 is formed to be narrower and tilted upward as it goes toward the dewatered cake discharge port 4, and the dehydrated cake discharge port 4 is connected to the sludge supply port 2, that is, the sludge surface WL supplied to the sludge chamber 6. It is placed higher up.

As shown in FIG. 2, the body 5 is made up of a fixed body 8a, which is made by stacking and fixing a large number of elongated thin plate-shaped fixing pieces 8, which are long enough to reach from the sludge supply port 2 to the dewatered cake discharge port 4, at predetermined intervals. , has a movable body 9a in which a large number of thin disc-shaped movable pieces 9 are stacked and fixed to a rotating shaft 11, and the fixed pieces 8 and the movable pieces are arranged so as to mesh with each other alternately, and the movable body 9a is connected to the fixed body 8.
A plurality of them are arranged along the longitudinal direction of a. The rotating piece 8 is a support rod 1 horizontally suspended within the dehydrator main body 1.
0 and the movable piece 9 is attached to the fixed piece 8.
It is attached to rotating shafts 11 that are arranged orthogonal to each other at substantially equal intervals.

The movable pieces 9 may all have the same diameter, but it is effective to arrange movable pieces 9 with different diameters at predetermined intervals in reducing the moisture content of the dehydrated cake.

A rotation drive mechanism (not shown) is provided at one end of the rotation shaft 11, and the rotation shaft 11 is rotated by the rotation drive mechanism. Further, the rotational speed of the rotating shaft 11, that is, the rotational speed of the movable piece, decreases toward the dehydrated cake discharge port (the closer to the dehydrated cake discharge port).

The embodiment of this invention has the above configuration, and its operation will be explained below. In FIG. 1, water in the sludge supplied from the sludge supply port 2 moves downward through the minute gap 12 between the fixed piece 8 and the movable piece 9 due to capillary action and enters the liquid chamber 7. After that, the liquid is discharged from the liquid discharge port 3.

On the other hand, the solids in the sludge are successively bridged and deposited in the minute gaps, and are concentrated by the rotational movement of the movable piece 9 in the direction of the arrow at the dewatered cake discharge port 4.
They are being transported one by one towards. In this case, the minute gap 12 is constantly self-cleaned by the rotational movement of the movable piece 9, so that it is not clogged and water can be effectively dehydrated by capillary action.

Then, dehydration due to the above series of capillary phenomena, etc.
The conveyance of the solids and the cleaning of the minute gap are carried out sequentially by the rotational movement of the movable piece, and since the minute gap is present on the entire opposing surface of the fixed piece and the movable piece, the sludge can be effectively dehydrated.

As described above, according to this invention, a body is constructed by arranging a large number of fixed pieces and movable pieces side by side at a predetermined interval, and by rotating the movable pieces, the fixed piece and the movable piece are It has extremely excellent effects such as preventing clogging of the minute gap between the sludge and the sludge, dewatering the sludge efficiently through capillary action in this minute gap, and allowing the sludge to be transported smoothly.Moreover, it is easy to assemble and manufacture. can get.

In addition, as in the embodiment, the sludge chamber is formed to be narrower and tilted upward as it goes toward the dewatered cake discharge port, the dehydrated cake discharge port is arranged above the sludge supply port, and movable pieces with different diameters are arranged. By combining and slowing down the rotational speed of the movable piece toward the dewatered cake discharge port, the sludge dewatering efficiency can be improved and the water content of the dehydrated cake can be further reduced.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of one embodiment of this invention;
The figure is a cross-sectional view along the line of FIG. 1...Dehydrator main body, 2...Sludge supply port, 3...
Liquid outlet, 4... Dehydrated cake outlet, 5...
body, 6...sludge chamber, 7...liquid chamber, 8...fixed piece, 8a...fixed body, 9...movable piece, 9a...
...Movable body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A fixed body in which a large number of elongated thin plate-shaped fixed pieces are stacked at predetermined intervals, and a movable body in which a large number of thin disc-shaped movable pieces are stacked at predetermined intervals. a body comprising: the fixed piece and the movable piece disposed so as to mesh with each other; and a plurality of movable bodies disposed along the longitudinal direction of the fixed body; a sludge chamber and a liquid chamber formed in the dehydrator main body by arranging a pair facing each other in the dehydrator main body; a sludge supply port formed in the dehydrator main body so as to communicate with one end of the sludge chamber; A dewatered cake discharge port formed in the dehydrator main body so as to communicate with the other end of the sludge chamber, a liquid discharge port formed in the dehydrator main body so as to communicate with the liquid chamber, and the movable piece are attached. A sludge dewatering device characterized by comprising a rotational drive mechanism that rotates a rotary shaft. (2) The sludge dewatering device according to claim 1, wherein the rotational speed of the movable piece decreases toward the dewatered cake discharge port. (3) The sludge dewatering apparatus according to claim 1 or 2, wherein the sludge chamber is formed to become narrower as it goes toward the dewatered cake discharge port. (4) The sludge chamber is inclined upward toward the dewatered cake discharge port, and the dewatered cake discharge port is disposed above the sludge supply port. Claim 1 of the Utility Model Registration Claim , the sludge dewatering device according to any one of Items 2 and 3. (5) The sludge according to any one of claims 1, 2, 3, and 4, wherein the movable pieces have different diameters arranged at predetermined intervals. Dehydration equipment.