JPS5912973Y2 - Filter cloth replacement type filtration device - Google Patents

Description

[Detailed description of the invention] This invention is a filter cloth replacement type filtration device that filters the polluted liquid by passing it through a part of the band-shaped filter paper, and when the iron part becomes clogged, replaces it with a new filter paper surface and performs the filtration process. Regarding the structure of

An example of a conventional filter cloth replacement type filtration device will be explained with reference to FIG.

The polluted filtrate inflow box 1 is provided with a pressure pump 2, a conveyor chain 3 that rotates through the internal bottom, and a guide roller 4 that comes into pressure contact with the conveyor chain 3.

The edge of a band-shaped filter paper 5 is sandwiched between the conveyor chain 3 and the guide roller 4, and is passed through the bottom surface of the inlet box 1.

An airtight processing liquid tank 6 is connected to the lower part of the inflow box 1, and a drainage pump 7 below the liquid level and a decompression pump 8 above the liquid level are connected to the processing liquid tank 6.
and

The filtrate is put into the inlet box 1, the treatment liquid is sucked into the treatment liquid tank 6 through the filter paper 5 by the vacuum pump 8, and the drain pump 7 discharges the sucked treatment liquid.

When the resistance increases due to clogging of the filter paper 4, forced filtration is performed by the pressure pump 2, and when the filtration resistance increases further, the clogged portion of the filter paper 5 is sent out by the conveyor chain 3 and the guide roller 4 and replaced with a new filter paper portion.

However, since the decompression pump 8 is used to force suction, the turbidity of the treated liquid decreases, a large number of pressurization pumps, decompression pumps, and drainage pumps are used, and foreign matter adheres to the filter paper surface, resulting in rapid clogging. However, there were drawbacks such as a high consumption rate of filter paper.

In view of the above-mentioned drawbacks, this invention improves the clarity of treated water,
It is an object of the present invention to provide a filter cloth replacement type filtration device that increases the consumption rate of filter paper and reduces the number of pumps.

The purpose of this invention is to increase the area supporting the replacement filter paper by providing a scraper that comes into contact with the foreign matter clogging the filter paper, so as to eliminate the need for pressurization and depressurization pumps.

The configuration of an embodiment of the present invention will be explained based on the drawings.

FIG. 2 shows an explanatory diagram of this embodiment.

In the figure, a curved plate 9 with a gap having a gap throughout the entire surface that allows liquid to flow is provided in the tank, and a processing liquid tank 10 at the bottom of the curved plate 9 with a gap and a filtrate drifter box 11 above the curved plate 9 with a gap are provided. Separate into

A supply roll 13 for the filter paper strip 12 and a filter paper pull-out roller 14 are provided before and after the curved plate 9.
2 is movably hung over the gap curved plate 9.

Above the gap curved plate 9, a pair of endless conveyor chains 16 with scrapers 15 attached at regular intervals are arranged so that the chain wheels 1 are in pressure contact with the upper surface of the band-shaped filter paper 11 suspended therebetween by their own weight.
7.18 is rotatably suspended.

A discharge pump 19 is provided in the processing liquid tank 10.

The operation of the above configuration will be explained next.

The perforated curved plate 9 supports the band-shaped filter paper 12 stretched over the curved plate 9 so as to withstand the weight of the filtrate in the filtrate flow box 11 and the weight of the scraper 15 and chino 16 on the curved plate 9. , the processing liquid filtered by the band-shaped filter paper 12 is collected into the processing liquid tank 10.

The scraper 15 and the chino 16 are used to uniformly stroke and level the filter paper strip 12 on the curved plate 9 with gaps.
A supply roll 13 that scrapes filter residue accumulated on the surface to restore filtration ability and suppress filtration resistance, making an inflow box pressurizing pump and a processing liquid tank depressurizing pump unnecessary for forced filtration.
The filter paper pull-out roller 14 supplies a new strip of filter paper 12 from one side of the gap curved plate 9, and pulls out the filter residue and worn filter paper strip 12 from the opposite side, thereby replacing the filtering surface.

The pump 19 serves both to adjust the pressure within the processing liquid tank 10 and to discharge the processing liquid.

The perforated curved plate 9 may be a punched metal with a large number of holes arranged in a staggered pattern, a lath metal with diamond-shaped windows, an armor plate with a plurality of slits, a lattice plate, etc., with a curved surface.

Further, the scraper 15 can be freely selected from a flexible brush-like type to a rigid straight-type type depending on the size and spacing of the slits in the curved plate 9.

As explained above, in this invention, the band-shaped filter paper is movably passed over a curved plate with gaps, and the conveyor chain with a scraper is rotated on top of the strip, so that the filter residue accumulated on the filter paper can be removed by the scraper. remove and restore filtration ability,
There is no need for forced filtration due to an increase in filtration resistance, and the filtration ability is maintained without damaging the filter paper, so the structure can be simplified and the filter paper consumption rate can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the prior art, and FIG. 2 is an explanatory diagram of an embodiment of the present invention. 9: Perforated curved plate, 10: Processing liquid tank, 11: Filtrate inflow box, 1
2: filter paper strip, 15: scraper, 16: endless conveyor chain.

Claims (1)

[Scope of utility model registration request] A treatment liquid recovery tank is provided opposite the bottom of the pollution source liquid inflow box,
In the filter cloth replacement type filtration device, in which a continuous strip of filter paper is movably interposed in a gap between the pollution source liquid inflow box and the processing liquid recovery tank, the liquid can freely flow through the upper surface of the processing liquid recovery tank. A filter characterized in that a curved plate with a gap is provided, the filter paper is interposed along the upper surface of the curved plate with a gap, and a conveyor chain with a scraper is suspended in the gap so as to be in pressure contact with the filter paper. Cloth replacement type filtration device.