JPH08182902A - Filtration machine and filtration method - Google Patents

Abstract

(57) [Summary] [Object] The present invention aims to regenerate a filter medium in a filter without removing it. [Structure] A pair of filter frames 3 and 4 that can be opened and closed.
A liquid to be treated introduction path 6 communicating with one of the filter frames 3, a filtrate discharge path 7 communicating with the other filter frame 4, the pair of filter frames 3,
An endless sheet-shaped filter medium 5 arranged between the four,
It comprises a scraping roll 12A which is a means for removing cake accumulated on the endless sheet-shaped filter material 5 outside the filter frames 3 and 4, and is introduced from the liquid to be treated introduction path 6 by the filter material 5. The treated liquid is filtered, the filtrate is discharged from the filtrate discharge passage 7, and the cake C accumulated on the filter medium 5 is removed by the scraping roll 12A.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a filter and a filtration method.

[0002]

2. Description of the Related Art Conventionally, a filter frame (21) and the filter frame as shown in FIG.
A pair of side frames (22A, 22B) sandwiching (21) from both sides, and a sheet-shaped filter medium (23A, 23B) interposed between the filter frame (21) and the side frames (22A, 22B). The sheet-like filter medium (2) is formed by introducing the liquid to be treated into the filter frame (21) through the liquid to be treated introduction path (24).
(3A, 23B), and the filtrate is discharged from the filtrate discharge path (25), and when the filter material (23A, 23B) becomes clogged, the filter material (23A, 23B) is wound for a predetermined length to form a side frame. (22A, 22B) and a filter (20) for renewing the filter material (23A, 23B) between the filter frame (21) and a filtering method (JP-A-4-29706, JP-A-4-29706).
No. 29707).

[0003]

However, in the above-described conventional filter (20) and filtration method, the sheet-like filter material (23A, 23B) that has been clogged is wound up, and is filtered before reuse. It is necessary to remove the filter media (23A, 23B) from the machine (20) and provide a clogging elimination means such as washing.

[0004]

As a means for solving the above-mentioned conventional problems, the present invention communicates with a pair of filter frames (3, 4) which are openably and closably combined, and one filter frame (3). Filtrate discharge path that connects the liquid to be treated (6) and the other filter frame (4)
(7), the endless sheet-shaped filter material (5) rotatably disposed between the pair of filter frames (3, 4), and the endless sheet outside the filter frames (3, 4). The present invention provides a filter (1) comprising a means (12A) for removing cake accumulated on a filter-shaped filter material (5), and further using the filter (1).
The liquid to be treated is press-fitted from the liquid to be treated introduction path (6) communicating with the filter frame of (1), and the endless sheet-like filter medium (3, 4) disposed between the pair of filter frames (3, 4). The liquid to be treated is filtered by 5), the filtrate is discharged from the filtrate discharge passage (7), and the endless sheet-shaped filter material (5) is circulated to outside the filter frame (3, 4). The present invention provides a filtration method for removing cake C accumulated on the filter material (5).

[0005]

[Function] The pair of filter frames (3, 4) are closed via the endless filter medium (5), and the liquid to be treated is introduced from the liquid to be treated introduction path (6) into one of the filter frames (3). It is pressed in and filtered by the filter medium (5), the filtrate is discharged from the filtrate discharge passage (7) of the other filter frame (4), and the solid content contained in the liquid to be treated is filtered as a filter medium (5). ) Deposit on top. When cake is deposited on the filter medium (5) and the filtration efficiency is poor, the filter frame (3, 4) is kept open, and the filter medium (5) is circulated to remove the filter frame (3, 4). Place a new filter media (5) part in between. The cake accumulated on the filter medium (5) is removed by the cake removing means (12A) installed outside the filter frame (3, 4), and the filter medium (5) is regenerated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. The filter (1) is a pair of upper and lower filter frames supported by the frame (2).
(3, 4) and a guide roll (11A, 11B, 11C, 11D, 11E) rotatably mounted at a predetermined position of the frame (2) so as to be rotatably suspended in the directions of the arrows in FIGS. 1 and 3. And an endless sheet-shaped filter medium (5). The filter medium (5) is made of, for example, a non-woven fabric or a knitted fabric of fibers such as polyester fiber, acetate fiber, acrylic fiber and polyamide fiber.

As shown in FIG. 1, the upper filter frame (3) is a frame.
The hydraulic cylinder (1
It is supported by 5) so that it can slide up and down. The liquid to be treated introduction path (6) communicates with the upper filter frame (3), and the lower filter frame (4) is fixed to the middle part of the frame (2) relative to the upper filter frame (3). ,
A filtrate discharge passage (7) communicates with the lower filter frame (4), and also, as shown in FIG.
A vibrator (3A) such as an eccentric motor vibrator is attached to the upper filter frame (3) via a bracket (3B) as shown in Fig. 4, and a porous plate is provided on the upper surface of the lower filter frame (4). (4A) is stretched. And the liquid to be treated introduction path
A pump (8) is interposed in (6) and the pump (8)
The motor (9) is contacted via 0).

As shown in FIG. 3, the filter medium (5) is guided by the guide rolls (11A, 11B, 11C, 11D, 11E) and a pair of filter frames.
It is arranged so as to circulate in the direction of the arrow between the (3, 4) and the inside of the cleaning tank (13) installed below the pair of filter frames (3, 4). A scraping roll (12A), which is a means for removing cake, is arranged on the frame (2) on the circulating direction side of the filter medium (5) of the pair of filter frames (3, 4), and the squeezing roll is on the other side. (12B)
Nozzles (16A, 16B) are arranged above and below the filter medium (5) on the outlet side of the cleaning tank (13).
Water supply pipes (16C, 16D) for supplying water are connected to 6B). Under the nozzles (16A, 16B), a receiving plate (13A) is extended from the cleaning tank (13), and an aeration pipe (13B) is arranged at the bottom of the cleaning tank (13). ing.
Further, below the scraping roll (12A), the scraping roll (1
A collection box (14) for collecting the cake C scraped by 2A) is installed.

In the filter (1) having the above-mentioned structure, the hydraulic cylinder (15) is operated to push the upper filter frame (3) downward so that the filter medium
Overlay the lower filter frame (4) through the (5), and set the motor (9).
To drive the pump (8) via the belt (10),
The liquid to be treated is pressed into the upper filter frame (3) through the liquid introducing passage (6). The liquid to be treated that has been pressed in is filtered by the filter medium (5), the solid matter in the liquid to be treated is deposited as cake C on the filter medium (5), and the filtrate is the filtrate discharge port (4) of the lower filter frame (4). 7) is discharged from. When the filter material (5) becomes clogged with the cake C by the above filtration, the motor (9) is stopped to stop the press-in of the liquid to be treated to interrupt the filtration. After that, the hydraulic cylinder (15) raises the upper filter frame (3), but in the case of highly sticky cake, a large amount of cake C adheres to the upper filter frame (3), so activate the vibrator (3A). The upper filter frame (3) is shaken to shake the cake C onto the filter medium (5). After that, the motor (17) is operated to circulate the filter medium (5) through the guide rolls (11A, 11B, 11C, 11D, 11E) for a predetermined length, and a new portion of the filter medium (5) is paired. Position between filter frames (3, 4). The clogged part of the filter material (5) moves to the outside of the pair of filter frames (3, 4), and there, the scraping roll
The cake C is scraped off by (12A), and the cake C is collected in the cake collecting box (14). Next, the filter medium (5) is a washing tank
It is introduced into (13) and cleaned by aeration from the aeration pipe (13B), and the filter medium (5) is further discharged from the cleaning tank (13) with a nozzle.
(16A, 16B) After being sprayed with water and washed,
Water content is squeezed by the squeezing roll (12B).
On the other hand, the cleaning wastewater of the filter medium (5) is received in the cleaning tank (13) through the receiving plate (13A). As described above, the filter medium (5) is washed and regenerated while circulating, and the regenerated filter medium (5) is filtered.
It can be reused without removing it from (1).

[0010]

Therefore, in the filter of the present invention, the filter material can be regenerated and reused without removing the filter material from the filter.

[Brief description of drawings]

 1 to 6 show an embodiment of the present invention.

FIG. 1 is a front view with a filter frame opened.

FIG. 2 is a sectional view of a filter frame.

FIG. 3 is a perspective view illustrating a cleaning mechanism of a filter medium.

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Filter 3 Upper filter frame 4 Lower filter frame 5 Filter material 6 Treatment liquid introduction passage 7 Filtrate discharge passage 12A Scraping roll (means for removing cake)

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[Procedure amendment]

[Submission date] March 10, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show an embodiment of the present invention.

FIG. 1 is a front view with a filter frame opened.

FIG. 2 is a sectional view of a filter frame.

FIG. 3 is a perspective view illustrating a cleaning mechanism of a filter medium.

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of Codes] 1 Filter 3 Upper filter frame 4 Lower filter frame 5 Filter material 6 Treatment liquid introduction path 7 Filtrate discharge path 12A Scraping roll (means for removing cake)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01D 29/62 B01D 29/38

Claims (2)

[Claims] 1. A pair of filter frames that are openably and closably coupled, a treated liquid introduction path that communicates with one filter frame, a filtrate discharge path that communicates with the other filter frame, and a space between the pair of filter frames. And a means for removing the cake accumulated on the endless sheet-shaped filter medium outside the filter frame. 2. The filter according to claim 1, wherein the liquid to be treated is press-fitted from a liquid introducing passage to be communicated with the filter frame, and the endless sheet-like member is arranged between the pair of filter frames. The liquid to be treated is filtered by a filter material, the filtrate is discharged from the filtrate discharge passage, the endless sheet-shaped filter material is circulated, and accumulated on the endless sheet-shaped filter material outside the filter frame. Filtration method characterized by removing cake