JPH01245894A - Filter apparatus for treatment of water - Google Patents

Abstract

PURPOSE:To efficiently perform filtering treatment by miniaturizing an apparatus as a whole, in a water treatment filter apparatus wherein a large number of cylindrical filter membranes are provided in parallel, by forming each of the filter membranes from a hollow yarn like membrane and providing a vibration apparatus for applying vibration to the filter membranes. CONSTITUTION:Water to be treated is allowed to flow over three flow passages 4, 5, 6 in a circulatory manner and vibrators 8 applying vibration to both end support parts 7 of the filter membranes 3 are provided and the whole of the filter membranes 3 are vibrated to release and remove the gel layers bonded to the surfaces of the filter membranes to keep an amount of permeating water high. Further, the release of the gel layers on the surfaces of the filter membranes is more enhanced by the turbulent action due to air bubbles from an air diffusion pipe 2 and the collision action of air bubbles with the filter membranes 3. Therefore, the amount of permeating water can be kept high while a filter apparatus is miniaturized as a whole and the permeation capacity of filtrate is enhanced.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a filtration device.

[Conventional technology]

In conventional filtration devices, large-diameter tubular membranes are arranged side by side in the flow path of the liquid to be treated and firmly fixed.

[Problem to be solved by the invention]

However, in order to increase the permeation capacity with a tubular membrane, it is necessary to increase the number of filtration membranes arranged in parallel, which has the disadvantage of increasing the size of the entire filtration device.

An object of the present invention is to increase the permeation capacity without increasing the size of the entire filtration device.

[Means to solve the problem]

The characteristic configuration of the filtration device of the present invention is that a large number of hollow fiber-like filtration membranes are arranged in parallel in the flow path of the liquid to be treated, a filtrate water recovery section is formed inside the filtration membrane, and vibration is applied to the filtration membrane. This is because a device for removing deposits on the film surface is provided, and its effects are as follows.

[For production]

In other words, hollow fiber membranes have a smaller diameter than tubular membranes, and can easily increase permeability by increasing the unit membrane surface area. The gel layer, which tends to adhere to the outer membrane surface, can be removed by vibrating the filtration membrane with a membrane surface deposit removal device.Since the membrane is hollow fiber-like, the entire membrane vibrates like the strings of a musical instrument, making it more effective. It is peeled off.

〔Effect of the invention〕

Therefore, it has become possible to downsize the entire filtration device, increase the permeation capacity of filtrate water, maintain a high amount of permeate water, and perform filtration processing efficiently.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

As shown in Figure 1, a treatment tank (1) is installed to biologically treat wastewater such as human waste, septic tank sludge, and underground water using activated sludge, and air from a blower (B) is supplied into the treatment tank (1). An aeration pipe (2) for aeration is placed in the treatment tank (1), and a large number of hollow fiber filtration membranes (3) are placed above the aeration pipe (2).
are installed in parallel and supported with both ends stretched, and the suction pump (P) is connected to the filtration membrane (3), and the treatment tank (1) is
The structure is configured so that only filtrate water is drawn out from the sludge-containing water through the filtration membrane (3), and in the treatment tank (1), the aeration pipe (2) is used to connect the aeration pipe (2) and the filtration membrane (3). A sludge-containing water supply channel (4) is formed in the sludge-containing water supply channel (4), and while the sludge-containing water passes through the flow channel (5) formed in the arrangement part of the filtration membrane (3), it is concentrated and flows above the filtration membrane (3). A concentrated sludge return path (6) is formed from the aeration pipe (2) to the aeration pipe (2), and the treated water is configured to circulate and flow through the three flow paths (4), (5), and (6).

Then, a vibration device (8) is provided that vibrates the support portions (7) at both ends of the filtration membrane (3), and the entire filtration membrane (3) is vibrated to peel off and remove the gel layer adhering to the membrane surface. It is designed to maintain a high amount of permeated water, and a diffuser pipe (
It is configured to further improve the peeling of the gel layer on the membrane surface by the turbulence effect caused by the bubbles from 2) and the collision effect of the bubbles against the filtration membrane (3).

The hollow fiber filtration membrane (3) is made of polyethylene,
It consists of flexible hollow fibers with a diameter of about 1 am.

[Another example]

The filtration membrane (3) is not provided with a special vibrating device (8), and the aeration tube (2) is also used as a vibrating device (8), so that the bubbles from the aeration tube (2) collide with the membrane surface. It may be possible to simply obtain vibration by doing so.

As shown in Fig. 2, the filtration membranes (3) are formed into a U-shape and fixed at both ends with support members (9), and the filtration membranes (3) are entangled with each other to prevent filtration. In order not to suppress the air flow rate, a diffuser pipe (2
) through the filtration membrane (
3) may be supported so as to stretch.

The material of the filtration membrane (3) may be other than polyethylene, as long as it is a hollow fiber membrane.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The first figure in the drawings shows a schematic diagram of the water treatment equipment, and the second figure shows a schematic diagram of the water treatment equipment.
The figure is a schematic diagram of a water treatment device according to another embodiment. (3)...Filtration membrane, (4)...Sludge-containing water supply channel, (5)...Flow channel, (6)...
... Thickened sludge return path, (8) ... Vibration device.

Claims (1)

[Claims] 1. Water in which a large number of cylindrical filtration membranes (3) are arranged in parallel in the flow path (5) connecting the sludge-containing water supply path (4) and the thickened sludge return path (6). A processing filtration device, the filtration membrane (3)
is a hollow fiber membrane, and is provided with a vibration device (8) that vibrates the filtration membrane (3). (3)
A filtration device in which a large number of filtration membranes (3) are arranged in parallel, a filtrate water recovery section is formed inside the filtration membrane (3), and a membrane surface deposit removal device (8) is provided which applies vibration to the filtration membrane (3). 3. The filtration membrane (3) according to claims 1 and 2 has an outer diameter of 2 mm.
A filtration device consisting of the following cylindrical filtration membrane. 4. A filtration device in which the filtration membrane (3) according to claims 1 and 2 is made of synthetic resin.