JPS6015362B2 - filtration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filtration device that can continuously filtrate waste liquid containing tar and minute hard suspended matter without significantly reducing the filtration performance of the furnace membrane.

When separating the solvent and solute from a solution using a furnace membrane,
If there are sticky substances such as tar or fine particles (e.g.
If hard particles (less than 0 µm) are included, these substances will clog the furnace membrane and the furnace overflow performance of the furnace membrane will drop sharply. In order to prevent this kind of deterioration in the performance of the furnace membrane, various proposals have been made for cleaning the furnace membrane, but none of these proposals effectively removes tar and other substances that have adhered to the surface of the furnace membrane. It was powerless to remove it. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a filtration device that can continuously filtrate wastewater containing tar and the like without significantly reducing the filtration performance of the furnace membrane.

According to the method of the present invention, the furnace membrane is irradiated with ultrasonic waves when liquid is passed through the furnace membrane and when the furnace membrane is backwashed, thereby preventing tar and minute hard particles in the wastewater from adhering to the furnace belly. prevented,
Or, even if it adheres, it is removed from the furnace membrane by the vibration of the furnace membrane caused by ultrasonic waves, so that a sudden drop in the furnace filtration performance of the furnace membrane and damage to the furnace membrane can be effectively prevented.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the structure of an embodiment according to the present invention.

In this embodiment, a furnace drum 4 is housed in the center part of the furnace casing 1, and the outer periphery of the furnace drum 4 is constituted by a furnace membrane 2.

A furnace liquid discharge pipe 5 having a furnace liquid passage 5a that extends into the furnace drum 4 is inserted into the casing 1. The casing 1 is rotatably supported via a bearing 6 and connected to a drive device outside the casing 1. A side wall of the casing 1 is provided with a stock solution inlet la and a backwash water outlet lc.

During liquid passage, the raw water pumped into the casing 1 through the raw liquid inlet la passes through the furnace membrane 2 on the outer periphery of the rotating furnace drum 4, enters the furnace drum 4, and becomes reactor water. The furnace liquid is discharged to the outside through a flow path 5a in the furnace liquid discharge pipe 5, which also serves as the rotation axis of the furnace liquid.

During backwashing, the reactor water sent back into the reactor drum 4 through the flow path 5a removes the deposits of the reactor pus 2 as it passes through the reactor membrane 2, and the sewage contaminated by the backwash is discharged through the outlet lc and Raw water inlet l
is discharged through a.

In both cases of liquid passage and backwashing, the ultrasonic wave irradiated from the ultrasonic generator 3 to the furnace membrane 2 removes deposits on the surface of the furnace membrane 2 or inside the furnace membrane 2 and removes them from the HZ membrane. Therefore, a sudden drop in the furnace overflow performance of the furnace membrane 2 is prevented. As described above, according to the present invention, by applying ultrasonic vibration to the furnace membrane when liquid is passed through the furnace membrane and when backwashing the furnace membrane, it is possible to prevent a sudden decrease in the furnace overflow performance of the furnace membrane. It is now possible to effectively filter wastewater containing sticky substances such as water.

Furthermore, according to the furnace membrane of the present invention, since the furnace membrane is provided on the rotating furnace drum, a large furnace surface can be formed, and the rotation of the furnace surface distributes ultrasonic waves evenly over the entire surface. It is possible to remove sticky impurities, hard suspended matter, etc. that adhere to the furnace surface.

Normally, a cylindrical furnace material has a more complicated structure than a planar furnace, and it is troublesome to replace the furnace material, but as in the present invention, by applying ultrasonic waves to the rotating drum, the troublesome replacement of the furnace material can be done. No need to replace. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing the structure of an embodiment of the present invention.

1... Casing, 2... Furnace membrane, 3.
...Ultrasonic generator, 4...Furnace drum.

Claims (1)

[Claims] 1. A casing having at least one inlet for introducing a stock solution, a filtration drum whose outer periphery is constituted by a filter membrane and rotates within the casing, and a filtration drum fixed to the filtration drum and having a rotating shaft of the filtration drum. a filtrate discharge pipe extending outside the casing and having a filtrate passage therein that communicates with the filtration drum; A filtration device comprising a sonic generator.