JPH0791796B2 - Papermaking equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention deposits a stock material having a concentration of about 10 to 30% into the tower through an input port on the upper surface and deposits it, and dilutes the stock material from the bottom of the tower. However, the present invention relates to a tower type depositing device for papermaking paper materials that is sequentially taken out.

<Prior art> Such a tower-type stock deposition device swells the virgin pulp stock tower and the disintegrated stock of waste paper in the presence of a deinking agent while it is in the tower, and also adheres to the fibers. It is used as a deinking tower that releases or facilitates the release of ink, has a paper feed inlet on the top surface, and has a tower for depositing paper stock inside, a nozzle for jetting dilution water, and A device having a diluting water supply passage from which a nozzle ejects and a stirring blade horizontally rotated at the bottom of the tower is disclosed in Japanese Examined Patent Publication No. 55-37638 (Japanese Unexamined Patent Publication No. 53-52703). -55835 (Japanese Patent Laid-Open No. 55-76186) is known.

In the above conventional device, a motor and a speed reducer are installed on the upper surface of the tower in order to drive the rake to rotate, and the center of the rake is fixed to the lower end to support it at the center of the tower bottom and the upper surface of the tower. The power unit transmits power to the upper end of the vertical axis.

<Problems to be Solved by the Invention> The rake rotates in the accumulated stock layer at the bottom of the tower while jetting the diluted water from the nozzle in the front in the rotational direction.

There is a huge tower with a diameter of 10 m and a height of 20 m, and the tower is filled with gissiri and paper materials. The upper end of the vertical axis bears at the center of the upper surface of the tower, and since it is powered near it, the paper feed inlet must be provided at an eccentric position deviated from the center of the upper surface, and as a result, inside the tower. The upper surface of the pile of paper stock is not uniform because it becomes higher just below the charging port, and the load or resistance applied to the stirring blade of the rake horizontally rotating at the bottom of the tower fluctuates greatly.

<Means for Solving Problems> A papermaking paper stock deposition device of the present invention has a stockboard input port on the upper surface thereof, a tower for depositing stock stock inside, a nozzle for jetting dilution water, and An apparatus for depositing paper and paper stock, comprising a rake having a diluting water supply flow path from which a nozzle jets and having a stirring blade horizontally rotated at the bottom of the tower, wherein the bottom of the tower is provided at the center of the rake. An integral shaft extending downward through the central part of the column is provided, and a power unit that supports the shaft and is rotationally driven is installed under the bottom of the tower, and the stirring blade is provided inside the blade. A diluted water supply flow path extending from the central base to the vicinity of the blade tip so as to contact all the nozzles arranged along the line, and a stock removal flow path reaching the central base from a stock inlet opening in a part of the blade And having.

In addition, the shaft of the rake is a hollow shaft, the upper end of which communicates with the stock removal passage in the blade through the stock compartment in the central base, and the lower end of the rake communicates with the withdrawal pipe. The upper half is surrounded by a cylindrical space with an outer cylinder, the upper end of this cylindrical space communicates with the diluted water supply passage in the blade through the diluted water compartment in the central base, and the lower end is the diluted water supply pipe. It is also recommended to be familiar.

<Operation> A power unit is installed under the bottom of the tower, and the power is transmitted to the shaft integrated with the rake that extends through the center of the bottom of the tower to the bottom. This eliminates the need for the conventional vertical axis of the rake, and as a result, the stock material inlet can be provided near the center of the upper surface of the tower.

Further, the stirring blade of the present invention ejects diluted water from nozzles arranged along the blade, and sucks diluted paper stock from a part of the stock material suction port of the blade and sends it to the discharge pipe.

<Examples> In each of the illustrated examples, 1 is a tower, 2 is a paper feed inlet provided at the center of the upper surface of the tower, and 3 is a rake that rotates horizontally at the bottom of the tower.

The rake is provided with a hollow central base 4 and a plurality of horizontally extending outwardly at equal intervals in the circumferential direction from the periphery of the base, and in this embodiment two hollow stirring blades 5 and 5, each stirring Nozzles 6 for ejecting diluted water are attached to the blade 5 along a front surface in the direction of rotation indicated by an arrow at predetermined intervals.

A hollow rotary shaft 7 integrally extends downward from the lower surface of the central base 4.

A space 8'is formed in a concrete foundation 8 below the center of the bottom 1'of the tower, and a frame 9 surrounding the lower half of the shaft 7 is constructed at the bottom of the space 8 '. An inner ring 10a of a bearing 10 is fixed to the upper surface of the frame 9 concentrically with the shaft 7, and a collar plate 11 is provided on the shaft 7 so as to project from the outer periphery. An outer ring 10b of the bearing 10 is provided on the lower surface of the outer periphery of the collar plate 11. Fix it. And this outer ring 1
Gears of the output shaft of a power unit 12 including a motor and a variable speed reducer installed on the frame 9 are provided with teeth 10c on the outer periphery of 0b.
2'is engaged with the tooth 10c. The bearing 10 is a power unit 12
In addition to smoothing the rotation of the rake 3 integrated with the collar plate 11 and, by extension, the shaft 7 by receiving power from the rake, it also receives the thrust of the rake.

In the embodiment shown in FIGS. 1 and 2, the inside of each stirring blade 5 of the rake is divided by a partition plate 5'into a diluting water supply flow path 13 along the front surface and a stock material discharge flow path 14 along the rear surface. Yes, take-out channel 14
Has a paper material suction port 14 'opened at the tip of the stirring blade 5.

In FIG. 3, the take-out flow path 14 is used as a conduit, but an outer cylinder 15 that surrounds the upper half of the shaft 7 with a space is hung from the lower surface of the rake center base 4, and the lower end of the outer cylinder 15 is the shaft. The upper joint box 16 rotatably sealed and attached to the outer periphery of 7 is rotatably sealed and rushes from above. Connect the diluted water supply pipe 17 to the upper joint box 16 to
The upper end of the cylindrical space surrounded by 15 is a communication hole 4'opened on the lower surface of the central base 4, and the diluted water inside the stirring blade 5 is passed through the diluted water compartment in the central base 4 (outside the joint cylinder 18). It is connected to the supply channel 13. Therefore, in the power unit 12 described above, the shaft 7, the outer cylinder
Rotate the rake 3 together with 15 at a speed of about 15 to 20 RPM,
When diluted water is supplied to the upper joint box 16, the diluted water rises in the cylindrical space surrounded by the outer cylinder 15, enters the central base portion 4 from the communication hole 4 ′, flows into the supply flow passage 13, and then from the nozzle 6. Gush out.

During this rotation, in order to extract the diluted stock at the bottom of the inside of the tower to the outside of the tower, a joint that forms a stock compartment in the central base 4 between the upper end of the shaft 7 and the take-out passage 14 inside the stirring blade. While being connected by a cylinder 18, the lower end of the shaft 7 is rotatably sealed from above into a lower joint box 19 fixed to the bottom of the space 8'in the concrete foundation so as to project into the joint box 19 and a suction pump. Connect the connected paper withdrawal pipe 20.

Thus, according to the embodiment shown in FIGS. 1 to 3, the rake is horizontally rotated at the bottom of the tower in the same manner as the conventional example of Japanese Patent Publication No. 57-55835 and the front surface of the stirring blade 5 in the rotating direction is changed. When diluting water is jetted from a certain nozzle 6, the stock at the bottom of the tower is diluted to about 4% when the concentration is about 10%, and this is withdrawn through the take-out passage 14 inside the stirring blade and the shaft 7. be able to.

In this embodiment, the take-out passage 14 is provided in each of the two stirring blades, but the take-out passage may be provided only in one of the stirring blades.

<Effects of the Invention> According to the present invention, since there is no ordinate of the rake bearing at the center of the upper surface of the tower or a power unit for rotationally driving this ordinate, there is no inlet for the stock material near the center of the upper surface of the tower. It has become possible to provide. As a result, the stock deposited by dropping from the charging port into the tower is dispersed almost uniformly throughout the tower, and fluctuations in the load applied to the stirring blades of the rake horizontally rotating at the bottom of the tower are eliminated. Also, the downward shaft for driving the rake is
The conventional height is 10 to 20 m and much shorter than the vertical axis. As mentioned above, there is no fluctuation in the load applied to the agitating blade of the rake that rotates horizontally, and the dilution stock along the blade does not change. Combined with the fact that it is sucked into some of the suction ports, the one with low strength can be used.

In addition, the quality of the diluted stock taken out from the tower is not the same as in the conventional case where the unevenness of the lower layer stock of the tower is taken out as it is, and the stock just diluted along the stirring blade is sucked from a part of the blade. Since it is taken out, the stock material having a constant concentration is always taken out.

[Brief description of drawings]

1 is a cross-sectional side view of a tower of an embodiment of the deposition apparatus of the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a main part of FIG. It is an expanded vertical side view. In the figure, 1 is a tower, 2 is an inlet on the upper surface, 3 is a rake, 4 is a central base thereof, 5 is a stirring blade, 6 is a nozzle, 7 is a shaft, 10 is a bearing, 12
Is a power unit, 13 is a diluting water supply passage, and 17 is a diluting water supply pipe.

Claims (2)

[Claims] 1. A tower having an inlet for stock material on the upper surface thereof, a tower for depositing stock material therein, a nozzle for ejecting diluted water, and a supply passage for diluted water ejected by the nozzle, the tower comprising: And a rake equipped with a stirring blade that can be horizontally rotated at the bottom of the rake, wherein a central base of the rake is provided with an integral shaft extending downward through the center of the bottom of the tower. A power unit for supporting and rotating the shaft is installed under the bottom of the tower, and the stirring blade is located inside the blade from the central base so as to come into contact with all the nozzles arranged along the blade. An apparatus for depositing a paper stock, comprising: a diluted water supply flow path extending to the vicinity; and a stock take-out flow path extending from a stock inlet opening at a part of the blade to the central base. 2. The apparatus according to claim 1, wherein the rake shaft is a hollow shaft, and the upper end of the rake communicates with a stock removal passage in the blade via a stock compartment in the central base. The lower end communicates with the withdrawal pipe, and the upper half of the shaft is surrounded by a cylindrical space with an outer cylinder, and the upper end of this cylindrical space is inside the blade via the diluted water compartment in the central base. A device for depositing paper stock, characterized in that it is connected to a diluting water supply flow path, and the lower end is connected to a diluting water supply pipe.