JP5730049B2 - Pulper - Google Patents

Description

    The present invention relates to a pulper, and more particularly to a pulper in which a papermaking raw material in a tank is circulated in a longitudinal direction (Z-axis direction) to improve a disaggregation force.

2. Description of the Related Art Conventionally, there is a pulper in which papermaking raw materials such as pulp and waste paper are put into a tank and disaggregated in water, and a baffle having a shape in which an upper part protrudes inward from a lower part is provided in the tank of the pulper.
In this pulper, the papermaking raw material in the tank can be guided by the baffle and circulated in the vertical direction (Z-axis direction).

    However, in the above-described pulper, although the papermaking raw material in the tank is circulated in the longitudinal direction (Z-axis direction) to disaggregate, there is room for improvement in terms of disaggregation force due to insufficient recirculation control. .

    The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a pulper whose disaggregation force is improved so as to obtain a strong circulation as a whole.

    The pulper according to claim 1 has a papermaking raw material inlet at an upper portion and a discharge port at a lower portion, a tank for receiving a papermaking raw material and water, a strainer provided so as to cover the outlet of the tank, and the tank Provided with a rotor for separating the papermaking raw material, and the tank has an inverted truncated cone part and a cylindrical part having a diameter D and a height H connected to the inverted truncated cone part. The rotor and the strainer are disposed in the inverted truncated cone part, the rotor is positioned on the strainer, and the rotation center of the rotor is the plane of the inverted truncated cone part of the tank in plan view. A baffle is provided on the inner wall of the cylindrical portion, and the baffle is orthogonal to the X axis and the Y axis with the rotation center of the rotor in plan view as the origin, and is counterclockwise. When divided into the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, the first quadrant and the quadrant The baffle is located in four quadrants, and the baffle has a first straight portion parallel to the Y axis that is greater than or equal to D / 4 and less than D / 2 from the peripheral wall of the cylindrical portion in plan view, and a tip of the first straight portion And a first inclined portion directed from the tip on the higher Y coordinate side toward the inner wall of the cylindrical portion, and the first inclined portion has an acute angle counterclockwise from a straight line parallel to the X axis. The bottom of the baffle has a straight line parallel to the X-axis from the tip of the first linear portion in a plan view, the tip of the cylindrical portion having a higher Y coordinate. The portion that contacts the inner wall of the cylindrical portion that has a Z (Z ≦ H) dimension in the Z-axis direction with the rotation center of the rotor as the origin from the portion that contacts the inner wall, and the surface that faces the cylindrical portion of the baffle is A lowermost part of the baffle and a tip of the first straight part of the baffle in plan view, A first surface formed by connecting a tip on the higher side of the Y coordinate and a tip of the first linear portion of the baffle in plan view on the lower side of the Y coordinate; The lower portion is connected to the tip of the first linear portion of the baffle in plan view, the tip on the higher side of the Y coordinate, and the portion in contact with the inner wall of the cylindrical portion of the first inclined portion in plan view. The rotor has a second surface formed, and the rotation direction of the rotor is a direction in which the papermaking raw material collides with a portion located in the fourth quadrant of the first surface.

    Further, the pulser according to claim 2 is the pulser according to claim 1, wherein the tip of the first linear portion in plan view has a coordinate axis with the tip of the higher Y-coordinate as the origin of rotation of the rotor. Assuming that the Y coordinate is Y1, 0 ≦ Y1 ≦ D / 4, and among the tips of the first straight line portion in plan view, the tip Y2 on the lower Y coordinate side is a part in contact with the inner wall of the cylindrical portion.

    According to the first aspect of the present invention, the lower part of the baffle and the tip of the first straight portion of the baffle on the higher side of the Y coordinate are circulated in the horizontal direction by the rotation of the rotor. The paper making the G shape of the alphabet in plan view, colliding with the first surface formed by connecting the tip of the first straight portion of the baffle to the tip of the lower Y coordinate side The eccentric circulatory flow (G-type horizontal circulatory flow) generates a vertical circulatory flow that descends while being guided by the first surface, and then a circulatory flow that is guided by the second surface of the baffle is formed, that is, Since the first surface is directed to the rotor rotation side, more papermaking raw material fed out from the rotor is guided to the first surface, and the inside of the tank is longitudinally (Z-axis direction). Rotating (eccentric longitudinal circulatory) produces a strong convection as a whole, disaggregating the papermaking raw material, It is possible to above.

FIG. 1 is a schematic cross-sectional view of a pulper according to an embodiment of the present invention. FIG. 2 is a schematic plan view of the pulper of FIG. 3 is a schematic perspective view of the tank of the pulper of FIG. FIG. 4 is a schematic partially enlarged plan view showing a part of FIG. 2 in an enlarged manner. FIG. 5 is a schematic cross-sectional view of FIG. 6 is a schematic plan view showing a circulating state in the pulper of FIG. FIG. 7 is a schematic cross-sectional view showing a circulating state due to the action of the second surface of the baffle of FIG.

A pulper according to an embodiment of the present invention will be described with reference to the drawings.
P shown in FIG. 1 to FIG. 7 is a pulper that feeds papermaking raw materials such as pulp and waste paper into a tank 1 and disaggregates them in water. The pulper P has a papermaking raw material inlet 1a (see FIG. 1) at the top and a lower part. Has a discharge port 1b (see FIG. 5) and a tank 1 for receiving papermaking raw material and water.
The tank 1 has an inverted truncated cone part 1A located below and a cylindrical part 1B located above, the cylindrical part 1B has a diameter D and a height H, and the cylindrical part 1B is connected to the inverted truncated cone part 1A. Has been.
The papermaking raw material 2 such as pulp and waste paper is continuously supplied into the tank 1 by the conveyor 3, and water is supplied into the tank 1 through the first pipe 5, and the papermaking raw material disaggregated in the tank 1 is The second pipe 6 discharges the tank 1 to the outside. In addition, 7 shown in FIG. 1 is a leg part which supports the tank 1. FIG.

4 and FIG. 5 is a strainer provided so as to cover the discharge port 1b of the tank 1, and the strainer 8 is, for example, a disk-shaped member having a large number of round holes. 9 is a rotor that disaggregates the papermaking raw material. The rotor 9 is configured to rotate power transmitted from a motor (not shown) via a belt 10, a pulley 11, and a rotating shaft 12.
As shown in FIG. 5, the rotor 9 and the strainer 8 described above are disposed in the inverted truncated cone portion 1 </ b> A of the tank 1, the rotor 9 is positioned on the strainer 8, and the rotation of the rotor 9 is performed. As shown in FIGS. 4 and 6, the center O is at the center of the inverted truncated cone part 1A of the planar view tank 1, and the rotation direction of the rotor 9 is the fourth of the first surface B1 described later. In this embodiment, the papermaking raw material collides with a portion located in the quadrant d (see FIG. 6), for example, counterclockwise in plan view.

1, 2, 3, 6, and 7 is a baffle provided on the inner wall of the cylindrical portion 1 </ b> B, and the baffle B is a planar view rotor 9 as shown in FIG. 6. Is the orthogonal coordinates of the X axis and the Y axis with the rotation center O as the origin, and when divided into the first quadrant a, the second quadrant b, the third quadrant c, and the fourth quadrant d in the counterclockwise direction, It is located in the first quadrant a and the fourth quadrant d.
As shown in FIG. 6, the baffle B includes a first straight portion B11 parallel to the Y axis that is greater than or equal to D / 4 and less than D / 2 from the peripheral wall of the baffle B, and the first straight portion B11. Of the first end B11A and B11B, the first inclined portion B21 heading from the higher end B11A of the Y coordinate toward the inner wall of the cylindrical portion 1B. The first inclined portion B21 is a straight line parallel to the X axis. It is more inclined counterclockwise at an acute angle θ.
Further, the lowermost BS (see FIG. 7) of the baffle B is such that a straight line parallel to the X axis from the tip B11A on the higher Y coordinate side of the tip B11A, B11B of the first straight portion B11 in plan view is a cylindrical portion 1B. This is a part in contact with the inner wall of the cylindrical portion 1B that hangs down from the part B11C in contact with the inner wall to the Z axis direction with the rotation center O of the rotor 9 as the origin.

The surface facing the cylindrical portion 1B of the baffle B is
The lowermost BS of the baffle B, the tip B11A of the first straight portion B11 of the baffle B in plan view, the tip B11A on the higher Y coordinate side, and the tip B11A of the first straight portion B11 of the baffle B , The first surface B1 formed by connecting the tip B11B on the lower side of the Y coordinate among B11B,
The lowermost BS of the baffle B, the tip B11A of the first straight portion B11 of the baffle B, the tip B11A on the higher Y coordinate side of the tip B11A, and the inner wall of the cylindrical portion 1B of the first inclined portion B21 2nd surface B2 formed connecting part B21B
have.
If the Y coordinate of the coordinate axis with the rotation center of the rotor 9 as the origin is the Y coordinate of the tip B11A having the higher Y coordinate among the tips B11A, B11B of the first linear portion in plan view, 0 ≦ Y1 ≦ D / 4, out of the tips B11A and B11B of the first straight line portion B11 in plan view, the tip B11B on the side with the lower Y coordinate is in contact with the inner wall of the cylindrical portion 1B.

    Therefore, according to the above-described pulper P, the rotor 9 rotates in the horizontal direction, and the lowermost BS of the baffle B and the tip of the first straight part B11 of the baffle B are shown in FIG. Among B11A and B11B, a tip B11A having a higher Y coordinate is connected to a tip B11A having a lower Y coordinate among the tips B11A and B11B of the first straight portion B11 of the baffle B. 6, the eccentric circulation (G-type horizontal circulation) of the papermaking raw material depicting the shape of the alphabet G in plan view is guided and lowered by the first plane B1 as shown in FIG. A longitudinal flow is generated, and then, the flow is guided and raised by the second surface B2 of the baffle B. That is, the first surface B1 is directed to the rotating side of the rotor 9, and the rotor is rotated. More papermaking raw material sent out from the first surface B1 As shown in FIG. 7, the tank 1 is guided to circulate in the longitudinal direction (Z-axis direction) (eccentric longitudinal circulation) to generate a strong convection as a whole to disaggregate the papermaking raw material and improve the disaggregation force. Can be made.

P pulper B baffle B1 1st surface B2 2nd surface BS lowest part B11 1st linear part B21 1st inclination part 1 tank 1B cylindrical part 9 rotor d 4th quadrant

Claims (2)

A papermaking raw material input port at the top and a discharge port at the bottom, receiving a papermaking raw material and water,
A strainer provided to cover the discharge port of the tank;
A rotor provided in the tank and disintegrating the papermaking raw material,
The tank has an inverted truncated cone part and a cylindrical part having a diameter D and a height H connected to the inverted truncated cone part,
The rotor and the strainer are disposed in the inverted truncated cone part, and the rotor is positioned on the strainer,
The rotation center of the rotor is at the center of the inverted truncated cone part of the tank in plan view,
A baffle is provided on the inner wall of the cylindrical portion,
The baffle is in the orthogonal coordinates of the X axis and the Y axis with the rotation center of the rotor in plan view as the origin, and in the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant counterclockwise. When divided, located in the first quadrant and the fourth quadrant,
The baffle includes a first straight portion parallel to the Y axis that is greater than or equal to D / 4 and less than D / 2 from the peripheral wall of the cylindrical portion in plan view, and the Y coordinate of the tip of the first straight portion. And a first inclined portion directed from the tip of the higher side toward the inner wall of the cylindrical portion, and the first inclined portion is inclined at an acute angle counterclockwise from a straight line parallel to the X axis. And
The lowermost portion of the baffle extends from the portion where the straight line parallel to the X axis from the tip of the first linear portion in the plan view in contact with the inner wall of the cylindrical portion from the tip of the higher Y coordinate. Is a portion in contact with the inner wall of the cylindrical portion that has a Z (Z ≦ H) dimension in the Z-axis direction with the rotation center of
The surface facing the cylindrical portion of the baffle is:
Of the lowermost part of the baffle and the tip of the first straight part of the baffle in plan view,
A first surface formed by connecting the tip on the high side of the Y coordinate and the tip of the first linear portion of the baffle in plan view to the tip on the low side of the Y coordinate;
Of the lowermost part of the baffle and the tip of the first straight part of the baffle in plan view,
A second surface formed by connecting a tip on the higher side of the Y coordinate and a portion in contact with the inner wall of the cylindrical portion of the first inclined portion in plan view;
The rotation direction of the rotor is a direction in which the papermaking raw material collides with a portion located in the fourth quadrant of the first surface. If the Y coordinate of the coordinate axis with the rotation center of the rotor as the origin at the tip of the first straight line portion in the plan view on the higher Y coordinate side is Y1,
0 ≦ Y1 ≦ D / 4,
2. The pulper according to claim 1, wherein a tip end Y <b> 2 having a lower Y coordinate among the tips of the first straight line portion in plan view is a portion in contact with the inner wall of the cylindrical portion.

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