JPH0233854Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a sludge dewatering roller in a dewatering device that removes water from sludge containing a large amount of water and continuously refines it into a cake (solid body). .

[Prior art and its problems]

First, a conventional dehydrating device of this type will be explained with reference to FIG.

In FIG. 6, an endless cloth belt 2 for removing moisture from the sludge is wound around a relatively large-diameter dewatering drum 1 via a plurality of guide rollers 3, 4, 5, and 6. These guide rollers 3 and 4
A sludge supply tank 7 is located on the inclined part of the cloth belt 2 located between the cloth belt 2 and the cloth belt 2.
It is provided so that it can be uniformly applied and supplied. Further, inside the cloth belt 2 located below the sludge supply tank 7, a dewatering recovery tank 8 having a drain pipe 8a is installed. The water in the sludge on the belt 2 is dehydrated and drained. Further, directly below the dehydration drum 1, there is a
A pair of pressure rollers 9 and 10 are arranged at intervals in the rotational direction of the dehydration drum 1, and these pressure rollers 9 and 10 are pressed against the dehydration drum 1 via the cloth belt 2. It's getting old. These pressure rollers 9 and 10 cooperate with the dewatering drum 1 to dehydrate the sludge on the cloth belt 2. A peeling plate 11 is obliquely installed on the dehydration drum 1 near the guide roller 5 so as to peel off the refined cake (solid body) W, and a peeling plate 11 is installed obliquely on the dewatering drum 1 in the vicinity of the guide roller 5. A cleaning pipe 12 having a cleaning nozzle 12a is attached near the cloth belt 2 located in between.

According to the conventional dewatering apparatus described above, by driving the dewatering drum 1 and the cloth belt 2 to supply the sludge in the sludge supply tank 7 to the cloth belt 2, a portion of the moisture in the sludge on the cloth belt 2 is removed. is collected in the dehydration recovery tank 8 and drained.
Further, the sludge on the cloth belt 2 is transferred between the dewatering drum 1 and the pressure rollers 9, 10, where it is compressed and dewatered by the dewatering drum 1 and the pressure rollers 9, 10, and caked. refined into
Thereafter, the cake stuck to the dewatering drum 1 is peeled off by a peeling plate 11 and discharged outside the machine.

However, in the above-mentioned dewatering device, in the case of sludge with poor susceptibility, this sludge gradually stagnates and accumulates in the cloth belt 2 between the dewatering drum 1 and both pressure rollers 9 and 10, and this causes do,
The cloth belt 2 itself may meander in a waveform before and after each pressure roller 9, 10, which not only reduces dehydration processing efficiency but also may damage the cloth belt 2 itself.

[Purpose of invention]

This invention was made in view of the above-mentioned circumstances, and eliminates the meandering of the cloth belt due to sludge.
An object of the present invention is to provide a sludge dewatering roller designed to improve dewatering efficiency.

[Summary of the idea]

The present invention is a dewatering device in which a cloth belt is wound around a dewatering drum through guide rollers, in which a rotatable mesh roller is pressed against the cloth belt, and a brush roller is concentrically placed inside a mesh cylinder inside the mesh roller. The brush roller inside the mesh cylinder smoothes the dewatering action, eliminates meandering of the cloth belt, prevents damage, and improves the dewatering efficiency. It is designed to achieve this goal.

[Example of idea]

The present invention will be explained below with reference to embodiments shown in the drawings. Note that the same components as those of the conventional device described above will be described with the same reference numerals in the drawings.

In Figures 1 to 4, reference numeral 1 denotes a dewatering drum having a relatively large diameter.
is wound around a plurality of guide rollers 3, 4, 5, and 6, and a sludge supply tank 7 stores sludge on the inclined part of the cloth belt 2 located between the guide rollers 3 and 4. It is provided so that it can be applied and supplied to the cloth belt 2 in a uniform thickness. Further, inside the cloth belt 2 located below the sludge supply tank 7, a dewatering recovery tank 8 having a drain pipe 8a is installed. The water in the sludge on the belt 2 is dehydrated and drained. Furthermore, the cloth belt 2 directly below the dewatering drum 1 is provided with a mesh roller (mesh dewatering roller).
13 is rotatably arranged so as to be able to press against it, and this mesh roller 13 is particularly constructed as shown in FIGS. 2 to 4.

That is, this mesh roller 13 is rotatably mounted concentrically in such a way that a brush roller 15 having a brush 15a is in sliding contact with a mesh cylinder 14 of a net-like pipe made of polypropylene material, and furthermore, , a rotating shaft 15b of the brush roller 15 located at both ends of the mesh cylinder 14;
A pair of flange members 16 are fixed to the mesh cylindrical body 14 so as not to slip out. In addition, on the dewatering drum 1 near the guide roller 5, a peeling plate 11 is attached to the purified cake (solid body) W.
A cleaning pipe 12 having a cleaning nozzle 12a is attached near the cloth belt 2 located between the guide rollers 3 and 6.

Next, the operation of the embodiment described above will be explained.

When the dewatering drum 1 and the cloth belt 2 are driven to supply the sludge in the sludge supply tank 7 to the cloth belt 2, a part of the moisture in the sludge on the cloth belt 2 is primarily dehydrated and collected in the dewatering recovery tank 8. The water will be drained. Further, the sludge on the cloth belt 2 is separated from the dewatering drum 1 and the mesh roller 1.
After that, the sludge on the cloth belt 2 is pressurized by the dewatering drum 1 and the guide roller 5 to refine the cake W, which is transferred to the dewatering drum. 1 to peeling plate 11
It is peeled off and released outside the machine.

In particular, the mesh roller 13 is connected to the dewatering drum 1 and the cloth belt 2, as shown enlarged in FIG.
While pressurizing the sludge sandwiched between the sludge with the mesh cylinder 14, the brush 15a of the brush roller 15 prevents the sludge from becoming clogged and promotes the secondary dewatering action.

Next, the graph shown in FIG. 5 shows the expansion rate of sludge, and the curve A of this graph shows the conventional one shown in FIG. This is an example.
As is clear from this graph, the example of the present invention has a smaller elongation rate regardless of the magnitude of the roller pressing force, and is superior to the conventional example.

[Effect of idea]

As explained above, the present invention includes a dewatering device in which a cloth belt is wound around a dewatering drum through guide rollers, a rotatable mesh roller is pressed against the cloth belt, and a rotatable mesh roller is pressed into the mesh cylinder of the mesh roller. The brush rollers are arranged concentrically and in sliding contact with the cloth belt, and the brush rollers eliminate clogging of the cloth belt while promoting the dewatering action and eliminating the accumulation of sludge between the dewatering drum and the cloth belt. This not only prevents the cloth belt from meandering, prevents damage to the cloth belt, and allows smooth and efficient dewatering of sludge to refine the cake. It is easy to assemble, and its mesh shape has good hydrophobicity.The sludge on the fabric belt is pressurized by the repulsive force of the brush, which improves the dehydration effect and further disperses the concentrated load on the mesh cylinder and fabric belt. Therefore, it has excellent effects such as being able to extend the life of these products.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of a dewatering device incorporating the sludge dewatering roller according to the present invention, Fig. 2 is a longitudinal sectional view of a mesh roller incorporated in the dewatering device of Fig. 1, and Fig. 3 is Fig. 2 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is the first cross-sectional view for explaining the operation of the present invention.
FIG. 5 is a graph showing the expansion rate of sludge, and FIG. 6 is a sectional view of a conventional dewatering device. 1... Dehydration drum, 2... Cloth belt, 3,
4, 5, 6... Guide roller, 7... Sludge supply tank, 10... Pressure roller, 11... Peeling plate, 1
3...Mesh roller, 14...Mesh cylinder body, 15...
brush roller.

Claims (1)

[Scope of utility model registration request] In a dewatering device in which a cloth belt is wound around a dewatering drum through guide rollers, a rotatable mesh roller is pressed against the cloth belt, and a brush roller is placed concentrically within the mesh cylinder of the mesh roller and attached to the cloth belt. A sludge dewatering roller characterized by being arranged so as to be in sliding contact.