JPS6337048Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a filter cloth winding type filter, and particularly to a deliquor removal device thereof.

This type of filter includes a filtration tank with a perforated plate installed at the bottom, a filter cloth is provided on the perforated plate, and the filter cloth is moved over the perforated plate by being wound up. It is composed of In the conventional structure, pressurized air is introduced into the filtration tank from above to remove the liquid in the tank, so the pressure is limited, so if the cake has a relatively high moisture content and is prone to cracks. Pressurized air may leak from the filtrate outlet, resulting in unnecessary operation of the pressurizing source, which is disadvantageous in terms of energy conservation.

The purpose of the present invention is to overcome the above-mentioned drawbacks of the prior art, and therefore, to provide a filter cloth-wound type filter that provides a cake with a low moisture content and is preferable from the point of view of energy saving.

The feature of this invention is that a diaphragm is installed at the top of the filtration tank, and the remaining liquid in the tank is pressurized through the diaphragm, and the bottom of the filtration tank is constructed with a bottom cover that can be opened and closed. , will be explained with reference to the drawings.

The figure shows one embodiment of the present invention, and as shown in the figure, this filter machine includes a filter tank 1, a perforated plate 2 is installed at the bottom of the filter tank 1, and a filter cloth 3 is placed on the perforated plate 2. placed. The filter cloth consists of a mesh-like cloth capable of filtering the stock solution introduced into the filter tank 1. The filter cloth 3 is wound around a pair of rollers 4 and 5, and is unwound from one roller 4 or 5 and unwound from the other roller 5 or 4.
It is moved on the perforated plate 2 by being wound up. An inlet 6 for a stock solution is installed at a suitable position in the filtration tank 1, and an inlet 7 for pressurized gas such as pressurized air is installed on the ceiling or upper part of the peripheral wall. This filter tank 1 and related members are supported by a frame 8. In the figure, 9 is a motor for driving one of the take-up rollers, and 10 and 11 are guide rollers for guiding the filter cloth 3.

In this filter, a diaphragm 12 is installed in the upper part of the filtration tank 1, and the diaphragm divides the inside of the filtration tank into an upper pressure chamber 1a and a lower filtration chamber 1b. Then, the introduction port 6 for the stock solution
communicates with the filtration chamber, and the pressurized gas inlet 7 communicates with the pressure chamber. The material of the diaphragm 12 is preferably rubber with high elasticity. In one example, in order to provide such a diaphragm 12, the filter tank 1
The top plate or lid part is separate from the main body, and the surrounding part of the diaphragm 12 is held between them. Also, the periphery of the lower end of the body of the tank is separated from the filter cloth 3 placed on the perforated plate 2, so that a suitable sealing material 13 is provided therebetween. The bottom of the filtration tank 1 that supports the perforated plate 2 is comprised of a cover plate 14 that can be opened and closed, and the cover plate 14 is opened and closed by, for example, a cylinder device 15. A pipe 16 for discharging the filtrate filtered through the filter cloth 3 is attached to a suitable position on the perforated plate 2.

During operation, with the filter cloth 3 placed on the perforated plate 2, the stock solution flows from the inlet 6 into the filtration chamber 1b in the filtration tank 1.
, in which the stock solution is filtered by passing through a filter cloth 3 and a perforated plate 2 below;
It is discharged from the discharge pipe 16. At this time, the filter cloth 3 is unwound from one roller 4 and taken up by the other roller 5 by the operation of the motor 9, thereby being moved intermittently or gradually, and the clogged filter cloth is removed. The section is removed from the perforated plate 2, a new section of filter cloth is placed on the perforated plate 2, and after some filtration time a cake accumulates on the filter cloth. When an appropriate amount of cake has accumulated on the filter cloth, the inflow of the raw solution from the inlet 6 is stopped, and pressurized gas is introduced from the inlet 7 into the pressure chamber 1a in the tank through the diaphragm 12 to remove the cake below. is compressed and filtered into filtration chamber 1.
Drain the cake remaining in step b. Note that during deliquification, the movement of the filter cloth 3 is preferably stopped.
After sufficiently removing liquid through the diaphragm,
The pressure in the pressure chamber 1a is lowered, the bottom cover 14 is pivoted downward and opened by the cylinder device 15, and the cake is taken out to the outside. Once the cake has been removed, the bottom lid 14 is closed again and the filtration work is carried out in the same manner as described above.

As mentioned above, in the filter cloth winding type filter according to the present invention, the cake remaining in the filter chamber is compressed and deliquified through the diaphragm due to the simple structure, so even if cracks occur in the cake, pressure is applied. There is no gas leakage, so the energy of the pressurization source is not wasted. Then, the cake can be compressed strongly enough and the cake can be sufficiently drained. Therefore, a cake with a low moisture content can be obtained, and it is also preferable from the point of view of energy saving.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of a filter cloth-wound type filter according to an example of the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG. 1. In the figure, 1...filter tank, 1a...pressure chamber, 1b...
...Filtering chamber, 2... Porous plate, 3... Filter cloth, 7... Pressurized gas inlet, 12... Diaphragm, 14...
...Bottom lid.

Claims (1)

[Scope of utility model registration request] It consists of a filtration tank with a perforated plate installed at the bottom and supported by a frame, and the filter cloth placed on the perforated plate is moved on the perforated plate by being wound around a roller. A diaphragm made of a highly elastic material is provided at the upper part of the filtration tank, and the diaphragm divides the inside of the filtration tank into a pressure chamber and a filtration chamber, and pressurized gas is supplied to the pressure chamber. An inlet is provided to introduce the
The filter cloth winding type filter is characterized in that the bottom of the filter tank is comprised of a bottom cover that can be opened and closed.