JP2024068322A - Pulper Equipment - Google Patents

Abstract

[Problem] To provide a pulper device with improved disintegration power for papermaking raw materials. [Solution] The pulper device is equipped with a tank having a papermaking raw material inlet at the top and a discharge outlet at the bottom, which receives papermaking raw materials and water, a strainer provided to cover the discharge outlet of the tank, and a rotor 3 provided in the tank and having blades 3a for disintegrating the papermaking raw materials, the blades are attached to the outer periphery of the rotor, and the blade angle is in the range of +15 degrees to -15 degrees, the blade angle being the angle between a line OX connecting the tip Y of the leading edge 3b of the blade to the center of the rotor and a line OY connecting the tip Y of the leading edge of the blade to the attachment part 3c of the rotor of the blade, the + being the direction moving away from the line OX connecting the tip Y of the leading edge of the blade to the center of the rotor in the opposite direction to the rotation direction of the rotor, and the - being the direction moving away from the line OX connecting the tip Y of the leading edge of the blade to the center of the rotor in the rotation direction of the rotor. [Selected Figure] Figure 7

Description

The present invention relates to a pulper device, and in particular to a pulper device that aims to improve the disintegration power of papermaking raw materials.

The pulper device has a papermaking raw material inlet at the top and a discharge outlet at the bottom, and is equipped with a tank that receives the papermaking raw material and water, a strainer that is provided to cover the discharge outlet of the tank, and a rotor that is provided in the tank and has blades that disintegrate the papermaking raw material, with the rotor and strainer disposed in the tank and the rotor positioned above the strainer (see patent documents).

Utility Model Registration No. 3211898

However, the above pulper device had a problem in that the blade angle was about 30 degrees, which meant that the clearance angle was large and the disintegration force of the papermaking raw material, which is the force exerted when the papermaking raw material came into contact with the rotor blades, was weak.

The present invention was made in consideration of the problems of the conventional technology described above, and its purpose is to provide a pulper device that improves the disintegration power of papermaking raw materials.

The pulper device described in claim 1 comprises a tank having a papermaking raw material inlet at the top and a discharge outlet at the bottom, which receives the papermaking raw material and water, a strainer provided to cover the discharge outlet of the tank, and a rotor provided in the tank and having blades for macerating the papermaking raw material, the blades are attached to the outer periphery of the rotor, and the angle of the blades is in the range of +15 degrees to -15 degrees, the angle of the blades being the angle between a line connecting the tip of the leading edge of the blade to the center of the rotor and a line connecting the tip of the leading edge of the blade to the attachment part of the rotor, the + being the direction moving away from the line connecting the tip of the leading edge of the blade to the center of the rotor in the direction opposite to the rotation direction of the rotor, and the - being the direction moving away from the line connecting the tip of the leading edge of the blade to the center of the rotor in the rotation direction of the rotor.

The pulper device described in claim 2 includes a tank having a papermaking raw material inlet at the top and a discharge outlet at the bottom, which receives the papermaking raw material and water, a strainer provided to cover the discharge outlet of the tank, and a rotor provided in the tank and having blades for disintegrating the papermaking raw material, the blades being attached to the outer periphery of the rotor, and the outer arc length of the blade on the side farther from the attachment point of the rotor being longer than the inner arc length of the attachment point of the blade on the rotor.

The pulper device described in claim 3 is the pulper device described in claim 1 or claim 2, in which the rotor is provided with a cover body that covers the tip of the rotor's rotation shaft, and has multiple auxiliary blades that extend from the center of the cover body to the outside, and these multiple auxiliary blades are erected from the flat surface of the cover body.

The pulper device of claim 4 is the pulper device of claim 1 or claim 2, in which a donut-shaped disk is provided on a rotor having blades, a cover body that covers the tip of the rotor's rotation shaft is located on the inner circumference of the donut-shaped disk, the difference between the radial dimension of the outer circumference of the donut-shaped disk and the radial dimension of the inner circumference of the donut-shaped disk is greater than the radial dimension of the cover body in a plan view, and multiple auxiliary blades are erected from the flat surface of the donut-shaped disk, and each of the multiple auxiliary blades is on the flat surface of the donut-shaped disk, and extends from near the inner peripheral edge of the donut-shaped disk to near the outer peripheral edge of the donut-shaped disk.

The pulper device described in claim 5 is the pulper device described in claim 1 or claim 2, which includes a cover body that covers the tip of the rotor's rotating shaft, a cover covering body that covers the outer periphery of the cover body, a flat surface of the rotor with blades, and a plurality of auxiliary blades connected to the cover covering body, the plurality of auxiliary blades being connected to the flat surface of the rotor with the blades and the cover covering body, and the plurality of auxiliary blades being erected from the flat surface of the rotor.

The pulper device described in claim 6 is the pulper device described in claim 1 or 2, in which the blade angle is set to approximately 0 degrees.

According to the pulper device described in claim 1, the blade angle is set in the range of +15 degrees to -15 degrees, so compared to the conventional blade angle of 30 degrees, the blade acts in a direction toward the papermaking raw material, improving the disintegration force of the papermaking raw material.

In addition, according to the pulper device described in claim 2, the outer arc length of the blade on the side farther from the rotor attachment point is longer than the inner arc length of the blade at the rotor attachment point, so that the blade area can be increased and the disintegration force of the papermaking raw material can be improved.

According to the pulper device of claim 3, in addition to the effects of the invention of claim 1 or claim 2 described above, the rotor is provided with a cover body that covers the tip of the rotor's rotating shaft, and has multiple auxiliary blades that extend from the center of the cover body to the outside, and these multiple auxiliary blades are erected from the flat surface of the cover body, that is, multiple auxiliary blades that extend from the center of the cover body to the outside, and moreover, these multiple auxiliary blades are erected from the flat surface of the cover body, so that the multiple auxiliary blades can improve the disintegration force of the papermaking raw materials.

In addition, according to the pulper device described in claim 4, in addition to the effects of the invention described in claim 1 or claim 2, a donut-shaped disk is provided on a rotor having blades, a cover body that covers the tip of the rotor's rotation shaft is located on the inner circumference of this donut-shaped disk, the difference between the radial dimension of the outer circumference of the donut-shaped disk and the radial dimension of the inner circumference of the donut-shaped disk is greater than the radial dimension of the cover body in a plan view, and multiple auxiliary blades are erected from the flat surface of the donut-shaped disk, and each of the multiple auxiliary blades is on the flat surface of the donut-shaped disk and extends from near the inner peripheral edge of the donut-shaped disk to near the outer peripheral edge of the donut-shaped disk, thereby improving the disintegration force of the papermaking raw material.

In addition to the effects of the inventions described in claims 1 and 2, the pulper device described in claim 5 includes a cover body that covers the tip of the rotor shaft, a cover covering body that covers the outer periphery of the cover body, and a plurality of auxiliary blades connected to the cover covering body and the flat surface of the rotor having the blades, and the plurality of auxiliary blades are connected to the cover covering body and the flat surface of the rotor having the blades, and the plurality of auxiliary blades are erected from the flat surface of the rotor, thereby improving the disintegration force of the papermaking raw materials.

In addition, according to the pulper device described in claim 6, the blade angle is set to approximately 0 degrees within the range of +15 degrees to -15 degrees, so that the blade acts more strongly in the direction toward the papermaking raw materials than with the conventional blade angle of 30 degrees, thereby further improving the disintegration force of the papermaking raw materials.

FIG. 1 is a schematic diagram of a pulper apparatus according to one embodiment of the present invention. FIG. 2 is a schematic plan view of the rotor of FIG. FIG. 3 is a schematic front view of FIG. FIG. 4 is a schematic partially enlarged view showing a part of FIG. FIG. 5 is a schematic perspective view of the rotor of FIG. FIG. 6 is a schematic exploded perspective view showing the rotor of FIG. 5 in an exploded state. 7(a) is an explanatory diagram for explaining the rotor of FIG. 2, FIG. 7(b) is an explanatory diagram for explaining the position where the blade angle is +15 degrees, and FIG. 7(c) is an explanatory diagram for explaining the position where the blade angle is -15 degrees. FIG. 8 is a schematic perspective view of a rotor according to another embodiment different from the rotors shown in FIGS. FIG. 9 is a schematic plan view of a rotor according to another embodiment different from the rotor shown in FIG. FIG. 10 is a schematic front view of FIG. FIG. 11 is a schematic perspective view of the rotor of FIG. FIG. 12 is a schematic exploded perspective view showing the rotor of FIG. FIG. 13 is a schematic plan view of a rotor according to another embodiment different from the rotors shown in FIGS. FIG. 14 is a schematic front view of FIG. FIG. 15 is a schematic perspective view of the rotor of FIG. FIG. 16 is a schematic exploded perspective view showing the rotor of FIG. 15 in an exploded state.

A pulper device according to one embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, P denotes a pulper device in which raw paper materials (not shown) such as pulp and waste paper are put into a tank (tub) 1 and disintegrated in water.
The pulper device P has a papermaking raw material inlet 1a at its upper portion and a discharge outlet (not shown) at its lower portion, and has a tank 1 for receiving papermaking raw material (not shown) and water.

In FIG. 1, reference numeral 2 denotes a strainer provided to cover the discharge port (not shown) of the tank 1, and reference numeral 3 denotes a rotor provided within the tank 1 and having blades 3a for disintegrating the papermaking raw material.
As shown in FIG. 1 , a rotor 3 and a strainer 2 are disposed in a vessel 1 , and the rotor 3 is positioned above the strainer 2 .
The arrows shown in FIG. 1 indicate the flow of papermaking raw material (not shown) caused by the blades 3a of the rotor 3 in the tank 1 and a number of auxiliary blades (raking blades) 3e (described later).

As shown in FIG. 7A, the blades 3a are attached to the outer periphery of the rotor 3, and in FIG. 7A, the angle of the blades 3a is approximately 0 degrees.
Therefore, compared to the conventional blade angle of 30 degrees, the blade 3a acts more strongly in the direction toward the papermaking raw materials, thereby further improving the disintegration force of the papermaking raw materials.

The angle of the blades 3a is preferably approximately 0 degrees as shown in FIG. 7(a), but the angle of the blades 3a may be in the range of +15 degrees [FIG. 7(b)] to −15 degrees [FIG. 7(c)].
That is, the angle of the blade 3a is the angle between a line OX connecting the tip Y of the leading edge 3b of the blade 3a to the center O of the rotor 3 and a line OY connecting the tip Y of the leading edge 3b of the blade 3a to the attachment portion 3c of the rotor 3 of the leading edge 3b of the blade 3a, and the + is the direction (e.g., clockwise) away from the line OX connecting the tip Y of the leading edge 3b of the blade 3a to the center O of the rotor 3 in the opposite direction to the rotation direction Z of the rotor 3 (e.g., counterclockwise),
The "-" indicates a direction (e.g., counterclockwise) away from a line OX connecting a tip Y of the rotor 3 at the leading edge 3b of the blade 3a and a center O of the rotor 3 in a rotation direction Z (e.g., counterclockwise) of the rotor 3. Note that Z in FIG. 7(a) indicates the rotation direction of the rotor 3.
In this way, because the angle of the blade 3a is set in the range of +15 degrees [Fig. 7(b)] to -15 degrees [Fig. 7(c)], the blade 3a acts in a direction toward the papermaking raw materials, improving the macerating force of the papermaking raw materials compared to the conventional blade angle of 30 degrees. In other words, by setting the angle of the blade 3a in the range of +15 degrees to -15 degrees and reducing the relief angle compared to the conventional blade angle of 30 degrees, the macerating force, which is the force when the papermaking raw materials come into contact with the blade 3a of the rotor 3, can be improved.

As shown in FIG. 7A, an outer arc length 3X of the blade 3a on the side farther from the attachment portion of the rotor 3 is longer than an inner arc length 3Y of the attachment portion of the blade 3a to the rotor 3 (3X>3Y).
Since an increase in the blade area affects the disintegration action of the papermaking raw materials between the back surface of the blade 3a and the strainer 2, the blade area can be increased to improve the disintegration force of the papermaking raw materials.

2 to 6, the rotor 3 is provided with a cover body 3d that covers the tip of the rotary shaft 4 of the rotor 3, and has a plurality of auxiliary blades (scraper blades) 3e extending from the center of the cover body 3d toward the outside, and these auxiliary blades (scraper blades) 3e are erected from a flat surface 3f of the cover body 3d. 5 shown in Fig. 4 is a replacement blade, and 5' is a layer formed by Stellite build-up on the underside of the replacement blade 5, and this layer 5' is preferably a thermal sprayed layer by WC thermal spraying instead of Stellite build-up.
In this way, the multiple auxiliary blades (scraping blades) 3e extend outward from the center of the cover body 3d, and since these multiple auxiliary blades (scraping blades) 3e are erected from the flat surface 3f of the cover body 3d, the multiple auxiliary blades (scraping blades) 3e can improve the disintegration power of the papermaking raw materials.
In other words, the centrifugal force of the multiple radially arranged auxiliary blades (raking blades) 3e creates a flow from the inside to the outside, and the papermaking raw material forms a swirling upward flow along the inner wall of the tank 1, combining with the rotating flow caused by the blades 3a of the rotor 3, as shown by the arrows in Figure 1. Therefore, a flow is formed in a direction from the top center of the tank 1 toward the bottom, and the papermaking raw material is swallowed up, forming a strong agitation and circulating flow.
Although the plurality of support blades (scraping blades) 3e have the same shape, as shown in FIG. 8, support blades (scraping blades) 3e' may be formed with some different shapes.

Further, the rotor 3 is not limited to the rotor 3 shown in FIGS. 2 to 6, but may be the rotor 3 shown in FIGS.
That is, a rotor 3 having blades 3a is provided with a doughnut-shaped disk body 3g,
A cover body 4a that covers the tip of the rotating shaft 4 of the rotor 3 is located on the inner circumference of this donut-shaped disk body 3g, and in plan view, the difference R between the radial dimension of the outer circumference of the donut-shaped disk body 3g and the radial dimension of the inner circumference of the donut-shaped disk body 3g is greater than the radial dimension r of the cover body 4a.
A plurality of auxiliary blades (scraper blades) 3i are erected from a flat surface 3h of the doughnut-shaped disk body 3g,
As shown in Fig. 12, each of the plurality of auxiliary blades (scraping blades) 3i is located on a flat surface 3h of the doughnut-shaped disk 3g, and extends from the vicinity of the inner peripheral edge 3j of the doughnut-shaped disk 3g to the vicinity of the outer peripheral edge 3k of the doughnut-shaped disk 3g. The above-mentioned plurality of auxiliary blades (scraping blades) 3i can improve the disintegration force of the papermaking raw material.

The rotor 3 is not limited to that shown in FIGS. 9 to 12, but may be the rotor 3 shown in FIGS.
That is, the rotor 3 comprises a cover body 3l that covers the tip of the rotating shaft 4 of the rotor 3, a cover body 3m that covers the outer periphery of the cover body 3l, a flat surface 3p of the rotor 3 having blades 3a, and a plurality of auxiliary blades (scraping blades) 3s connected to the cover body 3m, and the plurality of auxiliary blades (scraping blades) 3s are connected to the flat surface 3p of the rotor 3 having blades 3a and the cover body 3m, and the plurality of auxiliary blades (scraping blades) 3s stand upright from the flat surface 3p of the rotor 3. The plurality of auxiliary blades (scraping blades) 3s can improve the disintegration force of the papermaking raw material.

P Pulper device 1 Tank 1a Papermaking raw material inlet 2 Strainer 3 Rotor 3X Outer arc length 3Y Inner arc length 3a Blade 3b Front edge 3c Mounting portion (rotor mounting portion at the front edge of the blade)
3d Cover body 3e Auxiliary blade (scraper blade)
3f Flat surface 3g Donut-shaped disk 3h Flat surface 3i Auxiliary blade (oyster blade)
3j Inner edge 3k Outer edge
3l Cover body 3m Cover cover body 3p Flat surface 3s Auxiliary blade (scraper blade)

Claims (6)

A tank having a papermaking raw material inlet at an upper portion and a discharge outlet at a lower portion, for receiving the papermaking raw material and water;
a strainer provided to cover the outlet of the tank;
A rotor provided in the tank and having blades for disintegrating the papermaking raw material,
The blades are attached to the outer periphery of the rotor;
The blade angle is in the range of +15 degrees to -15 degrees;
the blade angle is an angle between a line connecting the tip of the leading edge of the blade to the center of the rotor and a line connecting the tip of the leading edge of the blade to an attachment portion of the rotor of the leading edge of the blade,
The + sign indicates a direction away from a line connecting the tip of the leading edge of the blade and the center of the rotor in a direction opposite to the rotation direction of the rotor,
The pulper device is characterized in that the - direction is away from a line connecting the tip of the leading edge of the blade and the center of the rotor in the rotation direction of the rotor. A tank having a papermaking raw material inlet at an upper portion and a discharge outlet at a lower portion, for receiving the papermaking raw material and water;
a strainer provided to cover the outlet of the tank;
A rotor provided in the tank and having blades for disintegrating the papermaking raw material,
The blades are attached to the outer periphery of the rotor;
A pulper device, characterized in that an outer arc length of the blade on a side remote from the attachment portion of the rotor is longer than an inner arc length of the blade at the attachment portion of the rotor. The pulper device according to claim 1 or 2, characterized in that the rotor is provided with a cover body covering the tip of the rotor's rotating shaft, and has a plurality of auxiliary blades extending outward from the center of the cover body, the plurality of auxiliary blades being erected from the flat surface of the cover body. A donut-shaped disk is provided on a rotor having blades,
A cover body that covers the tip of the rotor shaft is located on the inner periphery of the donut-shaped disk body,
In a plan view, a difference between a radial dimension of an outer periphery of the doughnut-shaped disk body and a radial dimension of an inner periphery of the doughnut-shaped disk body is larger than a radial dimension of the cover body,
A plurality of auxiliary blades are erected from the flat surface of the doughnut-shaped disk body,
The pulper device according to claim 1 or 2, characterized in that each of the plurality of auxiliary blades is on the flat surface of the doughnut-shaped disk body, and extends from near the inner periphery of the doughnut-shaped disk body to near the outer periphery of the doughnut-shaped disk body. A cover body that covers the tip of the rotor shaft;
A cover covering the outer periphery of the cover body;
a flat surface of a rotor having blades;
a plurality of auxiliary blades connected to the cover;
The plurality of auxiliary blades are connected to the flat surface of the rotor having the blades and to the cover housing;
3. The pulper device according to claim 1, wherein the plurality of auxiliary blades are erected from the flat surface of the rotor. 3. The pulper device according to claim 1, wherein the angle of the blades is set to approximately 0 degrees.