JP2529664Y2 - Suspension or emulsion filtration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a filtration device for filtering a suspension or an emulsion.

(Prior Art) It is conventionally known that filtration of a suspension or an emulsion is performed by filtering the suspension (or the emulsion) through a filter bed made of a particulate filtration medium. The filtration media is enclosed in a filtration tank such that the suspension flows upward through the filter bed, while the filtration media can flow downward through the filtration tank. This series of operations is performed in the following order. This series of operations is performed in the following order. That is, the suspension to be purified was sprayed at the lower part of the filter bed, the purified liquid was discharged from the top or upper part of the filter medium, the contaminated filter medium was conveyed from the bottom of the filter bed, and it was washed. Later, it is returned to the top of the filter bed. The introduced suspension flows upward through the filter bed, opposite the filter medium, and its clarified liquid phase is discharged at the top or above the filter bed.

In the conventional filtration device described above, for example in the filtration device disclosed in Patent No. 1108743, the suspension is passed through or near the bottom of the filtration tank, for example via an inlet means such as a pipe, to the lower part of the filter bed. To the sprayer, where it is sprayed in the filter bed. Therefore, the inlet pipe must pass through the most contaminated part of the filter bed, which is liable to cause clogging of the pipe by contaminant particles and failure.

In particular, the device disclosed in the above patent comprises a housing, a zone of particulate filtration media in the housing forming a vertically distributed filter bed in the device, and a suspension to be filtered. Or for an emulsion, an inlet means positioned relative to the filter bed zone such that the suspension flows upwardly through the filter bed during the filtration operation, and a filter bed positioned below the inlet means. A zone in communication with the zone, where the filtration media is continuously fed downward through the filter bed zone; a washing device located above the filtration zone; and a filtration media fed into the space and contaminated by filtration. Is transported to the cleaning device. Furthermore, the washing device is provided with means for returning the washed filter media to the top surface of the filter bed.

SUMMARY OF THE INVENTION The present invention is an improvement on the above-described filtration device, especially the filtration device disclosed in the above patent, characterized by the possibility of interfering with the operation of the filtration medium, in particular the possibility of the above-mentioned bip clogging. Has been removed. Further advantages achieved by the present invention are as follows. The housing has a simple structure, for example no entry boxes, rising pipes, etc. are required.

-No swing check valve is required in the inlet supply means.

-No need for an entrance box that may cause sludge.

No riser pipe is required in the bottom area of the housing (bottom cone) for the filtration medium.

-A simple ejection mechanism.

-Easy installation of the device on the concrete base.

-Rubber can be easily applied to the housing if necessary.

The passage on the floor between the filtration devices can be formed collectively inside a larger filtration installation.

-Increased availability.

-Less floor space required;

The features of the invention for achieving the advantages described above are set forth in the appended claims.

Embodiment An embodiment of a filtration device according to the present invention will be described in detail below, particularly with reference to the accompanying drawings, which show the relationship necessary for the operation of the filtration device.

The suspension or emulsion to be filtered is fed from the head pipe in the direction of arrow A via a conduit or feed pipe 2 into a number of successive, radially extending inlet means arranged below the filter bed. It is supplied to the sprayer 3. In this embodiment, each sprayer has a V-shaped roof, below which a pipe opening for suspension is arranged. This arrangement reduces the risk of clogging of the suspension medium near the pipe mouth. Further, in the above construction, the most contaminated filtration media, ie, the filtration media that has passed through the sprayer 3, will continue to move downward and will not be reused for filtration.

However, this area is a dangerous zone where contaminated filtration media is liable to clog, and any details of the filtration device can cause pipe clogging as long as it prevents uniform downward flow of the filtration media. The absence of an inlet pipe for the suspension in this part of the filter bed would therefore be an advantage for the operation of the filtration device. It is also advantageous to have a structure that ensures a uniform downward movement of the filtration medium. For example, the shape of the cone 4 allows the filtration media to move at a substantially uniform speed over the entire filtration area.

Since there is no inlet pipe at the bottom of the filtration tank, the structure of the tank is simpler than the conventional one. For example, the inlet for the suspension with spraying box, where deposits may have formed, and the inlet pipe through the bottom of the tank and above the mouth of the transport device have been completely removed.

In the vicinity of the bottom of the filtration tank, a conveying device, that is, an air suction pump 5 is located. The pump comprises a transport pipe 6 and is operated by air as a transport medium. Air is supplied from above along a pipe 7 extending alongside the transport pipe 6 and is introduced into the pipe via a hole at the lower end of the transport pipe. The contaminated filtration media is transported by air to a washing device 8 located above the filter bed. Here, it is desirable that the filtration medium encounters the washing liquid flowing back.
For example, the washing liquid supplied from the area of the filtrate phase located above the filter bed and contaminated during the washing process is discharged in the direction of arrow B. The washed filtration media is returned to the top surface of the filter bed zone.

According to an embodiment, the supply pipe 2 for the suspension extends through the center of the filter bed. In the embodiment shown, the transport device 6 is also arranged at the center of the filter bed. The supply pipe 2 for the suspension is in this case preferably arranged concentrically around the transport device.

As indicated by the arrows, the filtration medium flows downward in the bed zone and the suspension to be filtered flows upward through the bed zone. The filtrate phase above the filter zone is discharged via a weir (not shown) in the direction of arrow C to the outlet. Sand is optimal as the filtration medium, but may be a mixture of plastic particles or particulate material.

(Effect of the Invention) The device of the present invention allows continuous supply of the filtration medium in the downward direction due to no clogging of the filtration medium and suspension or emulsion caused by the direct extension of the inlet means from the conduit means. The liquid can be evenly distributed.

As can be seen, the inlet and outlet are all located above the filtration tank. For this reason, it becomes easy to install a plurality of filtration tanks adjacent to each other and in a line. Also, all tanks can be connected to the same inlet and outlet pipes, reducing the required floor space and improving availability.

Further, the composite arrangement of the tank in the concrete base can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a filtration device according to the present invention. 1: Housing, 2: Supply pipe, 3: Inlet means (sprayer), 5: Air suction pump, 6: Conveying pipe, 8: Cleaning device.

Claims (2)

(57) [Scope of request for utility model registration] 1. A filtration device for filtering a suspension or an emulsion, comprising: a housing; and a particulate filtration medium forming a filter bed zone distributed vertically in the housing.
An inlet means for the suspension or emulsion positioned with respect to the filter bed zone so that the suspension can flow upward through the filter bed during the filtration process; and a filter located below the inlet means. A region in communication with the bed zone, where the filtration medium flowing downward through the filter bed zone is continuously supplied, a washing device located above the filter bed zone, and a region supplied to the region and contaminated by filtration; A conveying device for lifting the filtered media to the washing means, wherein the washing device is provided with means for returning the washed filter media to the upper surface of the filter bed, wherein the inlet means is a suspension. Or connected to conduit means (2) extending downwardly from above the zone through the filter bed zone to the inlet means (3) for feeding the emulsion to the inlet means (3), and The conduit means is located in a centrally located filtration device. The inlet means each comprising a number of successive V-shaped roofs extending radially directly from the conduit means (2), the mouth of the conduit means (2) opening below the V-shaped roof. A suspension or emulsion filtration device. 2. A filter device in which the conveying device is disposed at the center, wherein the conduit means (2) is disposed concentrically around the conveying device (6). Item 7. The filtration device according to Item 1.