JPH06306789A - Disk filter in papermaking - Google Patents

Abstract

PURPOSE:To obtain a disk filter in papermaking improved in the throughput. CONSTITUTION:The disk filter used in papermaking is constructed from plural disk filters 1 installed at an interval in the shaft direction of a drum 2 having unit filters 3 on the outer peripheral side thereof. Each unit filter 3 is constructed from plural divided sectors 31 and drain guides 4 for leading drain after passing through the sectors 31 into the drum 2 are installed on the inside of the drum 2. The drain guides 4 are simultaneously provided for each sector 31 for exclusive use to face the tips of the drain guides 4 into the drum 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk filter in papermaking, and more particularly to a disk filter in papermaking with improved processing capacity.

[0002]

2. Description of the Related Art In a conventional disc filter for papermaking, drainage from adjacent unit filters is collected in a drainage chamber and introduced into a drum through a drainage guideway (drainage guide) (see, for example, Japanese Patent Laid-Open Publication No. Sho. No. 57-106792, see FIG. 2).

[0003]

In the conventional disc filter, since the disc filter is assembled in the drainage chamber and then guided into the drum through the drainage guide passage, the drainage capacity is slow and the rotation of the drum cannot be increased. After all, there is a problem that the processing capacity of the disk filter is lowered and the structure is complicated.

It is an object of the present invention to provide a disk filter for papermaking which eliminates the above-mentioned conventional problems.

[0005]

In order to achieve the above object, a disk filter in papermaking according to the present invention has a disk filter formed as a unit filter on the outer peripheral side of the drum with a space in the axial direction of the drum. In a disc filter for paper making, which comprises a plurality of units, the unit filter is composed of a plurality of divided sectors, and a drainage guide for guiding the drainage passing through the sector into the drum is provided inside the drum and the drainage guide is provided. Is provided exclusively for each sector, and the tip of the drainage guide faces the inside of the drum.

[0006]

In the disk filter for papermaking constructed as described above, the unit filter is composed of a plurality of divided sectors, and a drainage guide for guiding the drainage passing through the sector into the drum is provided in the drum. In addition to being provided inside, the drainage guide is provided exclusively for each sector,
Since the tip of the drainage guide is exposed to the inside of the drum,
The filtrate for each sector is guided to the drainage guide and flows into the drum.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a disk filter for papermaking, and 1 is a disk filter for papermaking.
Is provided with a plurality of disk filters formed in the unit filter 3 on the outer peripheral side of the drum 2 at intervals in the axial direction of the drum 2.

Reference numeral 21 is a rotary shaft of the drum 2, and the drum 2 is
It rotates in the direction of the arrow (counterclockwise).

The unit filter 3 has a wire provided in a mesh shape to allow water to pass therethrough but not paper material.
The unit filter 3 includes a plurality of divided sectors 31,
The drainage which is constituted by 31 ... And which has passed through the sector 31 is performed by the drainage guide 4 which is guided into the drum 2.

The drainage guide 4 is provided inside the drum 2, and the drainage guide 4 is provided exclusively for each sector 31, and the tip of the drainage guide 4 faces the drum 2.

Reference numeral 5 denotes a vat that stores the stock liquid, and the lower circular portion of the drum 2 is located inside the vat 5 that stores the liquid.

Moisture of the paper stock adhering to the unit filter 3 flows through the mesh of the sector 31 to the drainage guide 4, and the flow velocity and the liquid level difference cause a vaccum action, and the inside of the drum 2 is caused. It is designed to drain.

Numeral 6 is a knock-off shower or air nozzle for forcibly peeling the cake-shaped paper stock adhering to the unit filter 3, and is provided on both the front side and the back side of the unit filter 3. Reference numeral 61 is a pipe leading to the nozzle 6.

The cake-shaped paper material separated by the fluid pressure from the nozzle 6 is dropped to the chute 7 integrated with the vat 5 and guided to the outside.

Further, 10 is a cleaning nozzle for cleaning the unit filter 3 from which the cake-shaped paper material has been peeled off, and 11 is the drum 2
It shows the drainage liquid drained inside.

Therefore, when the disc filter 1 in papermaking is operated, the filtered filtrate flows into the inner surface of the sector 31 which passes through the liquid surface of the stock, and the filtrate is guided to the drainage guide 4, which is the conventional one. The flow velocity of the drainage is further increased and the drainage flows into the drum 2.

Then, until the drainage guide 4 passes the liquid level in the drum 2, a vacuum phenomenon occurs for the filtrate due to the flow velocity through the drainage guide 4, and as a result, a negative pressure is applied to the sector 31 existing in the liquid level of the stock. As a result, a suction and dehydration force is generated on both side surfaces of the sector 31, and the cake-shaped paper material attached to the suction and dehydration force can be effectively dehydrated.

After that, the cake-shaped paper stock adhering to the unit filter 3 is peeled off by the fluid pressure from the nozzle 6, and the peeled cake-shaped paper stock is dropped on a chute 7 integrated with the vat 5. Guided to the outside.

As a result, the flow velocity of the waste water can be increased as compared with the conventional one, and the rotational speed of the drum 2 can be increased correspondingly to improve the processing capacity of the disc filter.

[0020]

The disk filter for papermaking according to the present invention is a disk filter for papermaking, comprising a plurality of disk filters each of which is formed as a unit filter on the outer peripheral side of the drum with an interval in the axial direction of the drum. The unit filter is composed of a plurality of divided sectors, a drainage guide for guiding the drainage that has passed through the sector into the drum is provided inside the drum, and the drainage guide is provided exclusively for each sector. Since the tip of the above is exposed to the inside of the drum, the structure is not complicated, and the filtrate for each sector is guided to the drain guide and flows into the drum. The flow velocity can be increased, and the rotation speed of the drum can be increased by that much to improve the processing capacity of the disc filter. Kill.

[Brief description of drawings]

FIG. 1 is a schematic side view of a disc filter in papermaking according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a disk filter in the paper manufacturing shown in FIG.

[Explanation of symbols]

 1 Disc filter in papermaking 2 Drum 3 Unit filter 4 Drainage guide 431 Sector

Claims (1)

[Claims] 1. A disk filter for papermaking, comprising a plurality of disk filters each of which is formed as a unit filter on the outer peripheral side of the drum with an interval in the axial direction of the drum. A sector obtained by dividing the unit filter into a plurality of sectors. A drainage guide for guiding the drainage that has passed through the sector into the drum is provided inside the drum, and the drainage guide is provided exclusively for each sector, and the tip of the drainage guide faces the drum. A disc filter in papermaking that is characterized by