JPS5916091Y2 - filtration device - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of a filtration device, and more specifically, the invention has a large number of openings on the running surface, is flexible in both the longitudinal direction and the width direction, and the upper running surface is flexible. This invention relates to an improvement in a filtration device comprising an endless conveyor whose central portion is recessed from the surrounding edge to form a recess, and a filtration sheet that is continuously supplied onto the endless conveyor and conveyed and supported by the upper running surface.

Filtration treatment of wastewater containing sticky sludge, etc., especially wastewater containing paint sludge such as wastewater from a paint booth, is difficult with normal filtration equipment due to the stickiness and stickiness of paint sludge. In this case, the filter surface becomes clogged quickly and cannot be processed.

Killer agents are added to wastewater containing paint scum in order to eliminate the stickiness and adhesion of paint scum, but killer agents are expensive and their effectiveness is limited to reducing paint scum. It has not yet reached the point where tackiness and adhesion are completely lost.

Therefore, a filtration device has been devised in which filter paper is continuously fed from a roll onto an endless net conveyor that runs while the upper running surface forms depressions, and clogged filter paper is sequentially discarded, but new filter paper is always used for filtration. .

However, in this type of filtration device, in order to form a pool of the liquid to be treated (waste water) on the endless net conveyor, the central part of the upper running surface is recessed from the periphery, and the upper running surface itself is deformed when running. Therefore, there is a drawback that the filter paper does not easily follow the upper running surface and the filter paper tends to deviate from the normal conveyance path.

Furthermore, since the side edge portions of the upper running surface are considerably inclined toward the center, troubles such as filter papers slipping down or overlapping tend to occur.

Therefore, it is necessary to use strong, high-quality filter paper in this filtration device, and high-quality filter paper is expensive, resulting in high running costs.

Moreover, when the apparatus becomes large-sized, the above-mentioned drawbacks cannot be covered by the selection of filter paper alone.

The present invention aims to provide a filtration device that solves the above-mentioned drawbacks.According to the present invention, it has a large number of openings on the running surface and is flexible in both the longitudinal and width directions. , its upper running surface is equipped with an endless conveyor whose central part is recessed from the surrounding edge to form a depression, and a filtering sheet that is continuously supplied onto the endless conveyor and conveyed and supported by the upper running surface. In the filtration device, a shower device for sprinkling water on the filtration sheet is provided near the supply part of the filtration sheet, and a shower device for sprinkling water on the filtration sheet on the upper running surface is provided with water to be conveyed. A filtration device is provided, characterized in that a pressing member is provided for pressing both ends of a filtration sheet.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a partial cross-sectional plan view of a filtration device according to the present invention, and FIG. It is arranged so that it runs along the ceiling wall surface of the chamber 2, and its lower running surface passes under the bottom wall surface of the chamber 2 and runs in circulation.

Although an endless slat conveyor or the like may be used instead of the endless net conveyor, in this embodiment, an example using the endless net conveyor will be described.

The dress net conveyor 1 is also flexible in the width direction, and its upper running surface is shown in FIG.
As shown in the same C-C cross-sectional front view), the chamber 2
Following the shape of the ceiling wall, the center section is recessed from the side edges, and the conveyor itself deforms as it travels.

The endless net conveyor can be freely deformed to match the shape of the ceiling wall of the chamber.
In this embodiment, in order to prevent the endless net conveyor 1 from being unnecessarily deformed, the endless net conveyor 1 is bent at two places and can be deformed into a U-shape, but is not bent at any other places.

3 and 4 are a drive device and a chain for driving the endless net conveyor 1.

The ceiling wall surface of the chamber 2 is sequentially inclined toward the center as shown in FIGS. 3 and 4, and the inclined surface constitutes the guide plate 5 of the endless net conveyor 1.

As shown in FIG. 4, the center of the ceiling wall surface of the chamber 2 is open, and a support roller 6 is disposed in the opening to support the endless net conveyor 1 in the air.

The lower part of the guide plate 5 is made of a plate having a large number of holes, such as a punching plate, in order to widen the filtration area and make effective use of it.

Further, instead of the punching plate, round bars, square bars, etc., arranged in parallel with a certain interval may be used.

A flat parr 7 is interposed between the endless net conveyor 1 and the guide plate 5 in order to allow the endless net conveyor 1 to run smoothly and to effectively utilize the filtration area. A gap is formed between 5 and 5.

When performing forced filtration with negative pressure in the chamber 2, the interval between the gaps is preferably about 2 to 7 mm in consideration of the water seal effect.

If the interval is too narrow, although the water sealing effect is good, the effective use of the filtration area is inhibited, and the filtration processing capacity of the filtration device is reduced.

On the other hand, if the interval is too wide, a water sealing effect cannot be obtained and the inside of the chamber 2 cannot be maintained at a sufficient negative pressure, so that the filtration processing capacity of the filtration device is reduced.

Furthermore, in consideration of the water seal effect, it is preferable that the flat pars 7 are arranged in a zigzag pattern at the front and rear portions of the filtration device, as shown in FIG.

Filter paper 8 is continuously supplied onto the endless net conveyor 1 from a filter paper roll 9.

The material of the filter paper 8 is not limited in any way and may be ordinary paper, an inorganic material such as glass wool, or an organic material such as a plastic sheet.

A shower device 10 for sprinkling water on the filter paper 8 is disposed near where the filter paper 8 is supplied onto the endless net conveyor 1.

Immediately after the filter paper 8 is supplied to the upper running surface of the endless net conveyor 1, the shower device 10 sprinkles water on the filter paper 8 to wet the filter paper 8 and bring it into close contact with the upper running surface, so that the filter paper 8 is placed in the regular conveyance path. It is possible to prevent it from shifting.

Water is supplied to the shower device 10 using a pump 11 for the filtrate in the chamber 2 in a closed circuit manner.

Heat theory, water supply method is not limited to this,
It may also be supplied directly to the shower device 10 from an external source (for example, water supply).

The filter paper 8 comes into close contact with the depression in the upper running surface of the endless net conveyor 1, forming a pool of the liquid to be treated.

The liquid to be treated is continuously supplied to this liquid reservoir via the distributor 12 and is filtered.

A pressing member constituted by a roller 13 and a plate spring 14 for pressing both ends of the filter paper 8 is disposed on the side of the filter paper 8 which is conveyed and supported by the upper running surface of the endless net conveyor 1.

The configuration of the holding member is not limited to the above configuration,
Any structure may be adopted as long as it can reliably press both ends of the filter paper 8 without preventing the filter paper 8 from being conveyed.

Furthermore, the holding members may be arranged continuously or continuously.

By providing this holding member, it is possible to reliably prevent the filter paper 8 from slipping down or overlapping each other.

The combination of this pressing member and the shower device 10 allows even weak and inexpensive filter paper to be used stably.

Furthermore, even if the filtration device becomes large in size, the device can be operated stably without any trouble caused by the filter paper.

Both 15 and 16 are liquid level sensors.

The liquid to be treated is continuously supplied to the liquid pool and filtered, but when the filtering surface of the filter paper 8 becomes clogged, the filtration ability decreases, and the liquid level in the liquid pool rises, the liquid level sensor 15 is activated. Then, the endless net conveyor 1 is started to be driven, and new filter paper 8 is continuously supplied to the filtration processing area.

Even if new filter paper 8 is continuously supplied, if the liquid level in the liquid pool rises further, the liquid level sensor 16 is activated.
A supply device (not shown) for the liquid to be treated is stopped to prevent the pressing member from being immersed in the liquid to be treated.

This is because if the holding member is immersed in the liquid to be treated, troubles such as the roller 13 becoming unable to rotate or sticking to the filter paper 8 and damaging the filter paper 8 will occur.

The blower 17 sucks air from the chamber 2 through the air suction port 18 to generate and maintain negative pressure within the chamber 2 .

The exhaust air from the blower 17 is blown onto the liquid surface toward the sludge discharge section of the filtration device so that sludge and the like floating on the liquid surface of the liquid pool can be properly discharged.

The filtered sludge and the like are deposited on the filter paper 8 and are conveyed and discharged to the outside by the endless net conveyor 1.

The used filter paper 8 on which sludge and the like have accumulated is peeled off from the running surface of the endless net conveyor 1 by a filter paper discharge mechanism 19 and discharged.

The filter paper discharge mechanism 19 is connected to the drive shaft of the endless net conveyor 1 by a chain, and operates in synchronization with the endless net conveyor 1.

Reference numeral 20 denotes a discharge pipe for discharging the filtered filtrate in the chamber 2.

According to the present invention, which employs the above configuration, wastewater from a painting booth can be filtered stably for a long period of time by using a weak and inexpensive filter paper, without causing troubles due to the filter paper, and by using a large filtration device. I was able to do that.

[Brief explanation of drawings]

Fig. 1 is a partially sectional plan view of the filtration device according to the present invention;
The figures are a sectional side view taken along the line A-A in FIG. 1, FIG. 3 is a front view taken along the line C-C, and FIG. is a chamber, 6 is a support roller, 8 is a filter paper, 9 is a filter paper roll, 10 is a shower device, 12 is a distributor, 13 is a roller, 14 is a leaf spring, 15 and 16 are liquid level sensors, 19 is a filter paper discharge mechanism are shown respectively.

Claims (1)

[Scope of utility model registration request] The endless conveyor has many openings on the running surface and is flexible in both the longitudinal and width directions. In a filtration device comprising a filtration sheet that is continuously supplied on a conveyor and conveyed and supported by the upper running surface, a shower device for sprinkling water on the filtration sheet is provided near the supply section of the filtration sheet. 1. A filtration device characterized in that the filtration sheet is provided with pressing members for pressing both ends of the filtration sheet being conveyed on the sides of the filtration sheet on the upper running surface of the filtration sheet.