JPS5835297Y2 - Filter device with backwashing means - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for filtering dirty water such as cleaning liquid for dry cleaning, 9 food factories, 2 public baths, etc.

Traditionally, cleaning solutions such as perchlorethylene and turpentine used to wash laundry in dry cleaning are
The dirt from the clothes is carried away in the washing drum.

This perchloroethylene is used to remove dirt in a purifier that uses activated carbon as a cleaning agent, and the cleaning liquid is returned to the cleaning drum.

However, in such devices, in addition to general dirt, foreign matter such as oil scale, lint, or fiber waste is generated during the cleaning operation, and these foreign matter can clog the purifier and significantly reduce the cleaning action of the purifier. It is the cause.

Therefore, the object of this invention is to use this filter device to effectively remove in advance foreign matter such as oil scale, lint, or fiber waste mixed into the cleaning liquid.

Furthermore, when a certain number of uses has been reached, the sand can be cleaned and the dirt removed without replacing the sand, and the sand can be reused as is, which is a general rule.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the liquid filter device of this invention shown in the drawings will be described in detail below.

Reference numeral 1 denotes a closed tank with legs, and a shaft pipe 3 is rotatably supported inside the tank by passing through bearings 2, 2 provided on the front and rear walls.

The circumferential surface of the shaft pipe 3 is provided with small holes, in which a large number of liquid inflow holes 4 are opened, and a fine wire mesh 5 is stretched over the outer peripheral surface of the shaft pipe.

In addition to the wire mesh, the shaft pipe 3 may be covered with, for example, a water-permeable plate made by punching a nonwoven fabric or a metal plate with good water permeability.

Further, a drum 6 is disposed in the tank 1 in the shaft pipe 3. The drum 6 has a shell with many punches on its circumferential surface and a wire mesh is stretched around the outer periphery of the drum. It is fixed at 7.

The drum 6 is normally stopped, and a sand storage door 8 that can be opened and closed is provided on its upper surface, and a lid 9 is attached to the tank wall corresponding to the sand storage door.

Incidentally, the drum 6 stores granules of sand or a material having the same properties as sand.

This allows sand to be uniformly surrounded around the shaft pipe 3.

Further, one end of the shaft pipe 3 that protrudes outside the tank 1 is closed, and a handle 10 is attached to it, and the other end of the shaft pipe is open so that the pipe can be connected to the purifier 11 via the valve 12. be.

This purifier 11 is in communication with a cleaning drum 13.

In addition, a forked branch pipe 15 is provided at the inlet 14 at the bottom of the tank 1.
One branch pipe is equipped with a valve 16 and serves as an inlet for the cleaning liquid from the cleaning drum 13, and the other branch pipe is equipped with a valve 17 and serves as a discharge pipe for waste water, and is connected to the distiller 18.
This distiller is connected to a washing drum 13.

Next, as for the backwashing means, a compressor 20 is connected to the opening of the shaft pipe 3 via a valve 19.

A pipe 21 is attached to the side wall of the tank 1 and opens through a valve 22.

The liquid filter device of this invention is constructed as described above, and the operation of this device will now be explained.

First, before using this device, the branch pipe 15 of the cleaning liquid inlet
valve 17 is closed, valve 16 is opened, and the other valve 1 is closed.
2 is opened and valves 19° and 22 are closed.

Then, the handle 10 is stopped by appropriate means so that it does not move unnecessarily.

Now, the cleaning liquid after cleaning flows into the tank 1 from the inlet 14.

The cleaning liquid that has accumulated to some extent in the tank is removed from the wire mesh drum 6.
It passes through the wall and penetrates into the crushing inside the drum.

The cleaning liquid then flows into the shaft pipe from the inflow hole 4 through the wire mesh 5 of the central shaft pipe 3, and from there moves to the purifier 11 through the pipe.

In other words, when the cleaning liquid permeates the crushing process in the drum 1, foreign substances such as oil scale, lint, or fiber waste in the cleaning liquid remain during the crushing process and are removed, while dirt other than the foreign substances pass together with the cleaning liquid and are removed in the purifier 11. It will be purified.

The cleaned cleaning liquid then flows into the cleaning drum 13 and is used again as a cleaning liquid.

The cleaning liquid is then repeatedly circulated through the above-mentioned path, foreign matter remains in the filter device, and dirt other than foreign matter is removed by the purifier.

Next, by circulating through the above-mentioned path, a large amount of foreign matter remains in the filter device, and the cleaning action is temporarily stopped at the time when the filter reaches its filtration capacity.

The purpose is to remove foreign matter that has accumulated within the drum 1.

The operation first closes valve 12.16.17 and opens valve 19.22.

At this time, the drum 1 is filled with cleaning liquid.

Therefore, when compressed air is forced into the shaft pipe 3 from the compressor 20, this air becomes bubbles from the wire mesh 5 and floats in the cleaning liquid, and the foreign matter that has stayed in the drum 6 during crushing is separated from the drum together with the bubbles. It floats up, passes through the pipe 21, is discharged from the valve 22, and is sent to the distiller 18.

At this time, when the handle 10 is rotated, all foreign matter attached to the entire circumference of the drum 6 is removed from the drum.

This is because the compressed air from the compressor 20 turns into bubbles and removes foreign matter, so the capacity of the compressor is maximized and the foreign matter removal action is performed effectively.

When the valve 17 is then opened, the foreign matter suspended in the cleaning liquid is discharged through the pipe 15 into the distiller 18.

As described above, according to the filter device of this invention, it is easy to remove foreign matter such as oil scale, lint, or fiber waste mixed into the cleaning solution containing dirt after cleaning. Furthermore, if the filter medium becomes clogged with foreign matter, the compressor sends pressurized air into the shaft pipe for backwashing, making it extremely easy and reliable to regenerate the filter medium, which has a great practical effect.

[Brief explanation of the drawing]

The drawing is a cutaway front view of the filter device of this invention. 1...Tank, 3...Shaft pipe, 4.
...Liquid inflow hole, 5...Wire mesh, 6...
... wire mesh drum, 12 ... valve, 14
...Inlet, 19.22...Valve,
20...Compressor.

Claims (1)

[Scope of Claim for Utility Model Registration] A sealed tank having an inlet, a shaft penetrating through the tank and rotatably supported in a horizontal state,
A shaft pipe with pores on the outer circumferential surface, an open end at one end, and a handle at the other end is attached to the shaft pipe, which is supported horizontally, and grains such as sand are stored inside. This discharge pipe is connected to a wire mesh drum that can be rotated by a handle, a discharge port connected to the opening of the shaft pipe via a switching valve, and a discharge vibrator for backwashing installed in the sealed tank. a backwashing compressor for sending compressed air to the wire mesh drum through the shaft pipe while cleaning liquid is present in the closed tank; and a filter device having a backwashing means. .