JPH0244844Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a filtration device, particularly a disposable cartridge type filtration device for removing particulates from a liquid.

A conventional cartridge-type passing device has a plurality of disks 3 stacked at regular intervals in a housing 2 having a lid 1 that can be opened and closed as shown in FIG.

This disk 3 is made by, for example, pasting a membrane 5 on the upper and lower surfaces of two disk-shaped spacers 4 by means of welding or gluing, and by overlapping the central communicating part 6 of the plurality of spacers 4. It is fixed within the housing 2 by welding or gluing.

The stock solution to be filtered flows into the housing 2 from the stock solution inlet 7 at the lower end of the housing 2, and flows into each disk 3.
The fine particles in the stock solution pass through the upper and lower membranes 5 of the membranes 5, ascend through the numerous holes and grooves of each spacer 4, rise within the communication section 6, and exit from the permeate outlet 8 at the upper end. It is what is left outside of.

In the above device, an air vent hole 9 is provided in a part of the lid 1, and air bubbles 10 accumulated in the liquid in the housing 2 during initial use or during use are discharged from the air vent hole 9. be. Also, lid 1,
The housing 2 and the spacer 4 are made of, for example, ethylene-tetrafluoroethylene resin (PTFE), and the membrane 5 is made of, for example, tetrafluoroethylene resin (PTFE).
is used.

In the conventional filtration apparatus as described above, for example, when the filtration membrane 5 is hydrophobic and the filtration liquid is an aqueous solution, the filtration membrane 5 is generally first made hydrophilic by passing a liquid with a low surface tension such as ethanol. Afterwards, perform the operation to flow the desired liquid.

In this case, the air bubbles 10 accumulated at the bottom of each disk 3 cannot pass through the membrane 5, and therefore cannot be easily removed.

Therefore, it is necessary to perform operations such as providing an air vent hole 9 to allow the liquid to flow at high speed, or tilting the filter device to utilize buoyancy to discharge air bubbles.
If the piping is not flexible, the filter device cannot be tilted, so measures such as vibrating the filter device are taken.

However, if the liquid passing through such a filtration device is dangerous and highly viscous, such as sulfuric acid, the above operation is dangerous and time consuming.

In addition, in this type of filtration device, the distance between the disks is narrowed in order to increase the area of the filtration membrane, which tends to make it more difficult for air bubbles to escape.

This invention was made in order to solve the problems of the conventional exhaust device as described above. By tilting the disk with respect to the horizontal plane, air bubbles on the underside of the disk can be quickly removed from the air vent hole 9. It is an object of the present invention to provide a device capable of discharging wastewater.

An embodiment of the device of this invention will be described below with reference to FIGS. 3 and 4.

Since the basic structure and materials of both FIGS. 3 and 4 are the same as those of the apparatus shown in FIG. 1, each component is given the same reference numeral as in FIG. 1, and a description thereof will be omitted.

In the example shown in FIG. 3, each spacer 4 is formed in the shape of an inverted umbrella, and a membrane 5 is pasted on both sides of the spacer. Therefore, the lower surface of each disk 3 has a tapered slope.

Therefore, the air bubbles 10 on the lower surface of each disk 3 move outward along the tapered slope, rise inside the housing from the outer periphery of each disk 3, and flow into the air vent hole 9.
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In the example shown in FIG. 4, each spacer 4 has a flat plate shape and is inclined in a certain direction, and the angle of inclination with respect to the horizontal is about 5° to 10°.

In this embodiment as well, the air bubbles are guided to the higher side of the disk 3 along the slope of the lower surface of each disk 3, rise within the housing 2 from the periphery of the overplate 3, and are discharged from the air vent hole 9.

In this invention, the housing spacer, membrane, etc. are made of ethylene resin as in the case of FIG. 1.

In each of the above-mentioned embodiments, the communication part 6 at the center of each disk 3 is formed into a cylindrical shape with upper and lower parts open, and a through hole is provided in the center.
A small-diameter outer circumferential surface is provided at the upper part of the communicating part 6, and the lower surface thereof is made horizontal.A large-diameter inner circumferential surface is provided at the lower part of the communicating part 6, and its upper surface is made horizontal. The disks are connected by fitting their circumferential surfaces to form a vertical through hole in the center, and each disk 3 is inclined.

Since the filtering device of this invention has the above-described structure and operation, air bubbles contained in the stock solution are quickly discharged from the air vent hole in the upper part of the housing.

Therefore, air bubbles do not accumulate on the lower surface of each sieve plate in the initial stage, and air bubbles can be smoothly removed during operation and during installation of the sieve device.

In addition, the communication portion at the center of each disk is formed by providing a small diameter outer circumferential surface on the cylindrical upper part and a large diameter inner circumferential surface on the cylindrical lower part, and connecting the small diameter outer circumferential surface and the large diameter inner circumferential surface. By fitting the surfaces together, the disks are connected at a predetermined angle of inclination, which has the effect that the connection structure of the disks is extremely simple.

In addition, in conventional filtration devices, each filter plate is shaped like an umbrella or is tilted, but these conventional filtration devices remove the filtrate and filtrate attached to the top surface of the filter plate along the slope. The purpose is to slide down, and not to vent air by tilting like this invention.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal front view showing an example of a conventional diaphragm, Fig. 2 is a partially cutaway cross-sectional plan view of the same as above, and Figures 3 and 4 show embodiments of the diaphragm of this invention. It is a partially longitudinal front view. 2... Housing, 3... Disk, 4... Spacer, 5... Permeable membrane.

Claims (1)

[Scope of utility model registration request] A spacer made of resin provided in a housing made of resin is tilted, a filtration membrane made of resin is attached to both sides, and a vertical cylindrical communication part with the top and bottom open is formed above and below the center, and the upper part is connected. A small-diameter outer circumferential surface is formed horizontally in the lower part, and a large-diameter inner circumferential surface is formed horizontally in the lower cylindrical part, and the small-diameter outer circumferential surface is fitted into the large-diameter inner circumferential surface to form an inclined surface with respect to the horizontal plane. A filtration device characterized by stacking a plurality of disks at appropriate intervals.