JPH06299487A - Pulper - Google Patents

Abstract

PURPOSE:To provide a method for efficiently separating foreign substances e.g. clasps, hot-melt adhesive from waste papers in a raw material for papermaking, enabling the fine straining of large quantity of the raw material at once and sending them to the next process in good conditions. CONSTITUTION:A rough strainer plate 2 having many rough straining holes 2a is attached on the bottom 1a of a stirring tank 1 and a fine strainer plate 3 having many fine straining holes 3a is placed below the rough strainer plate 2 with an appropriate gap. The space between the rough strainer plate 2 and the fine strainer plate 3 serves as a rough strainer section 4 and a fine strainer section 5 is placed below the fine strainer plate 3. Upper rotary dissociation- blades 6 are attached on the upper face of the rough strainer plate 2 and lower rotatory dissociation-blades 7 on the upper face of the fine strainer plate 3. The objective apparatus is provided with a returning pass 11, through which foreign substances (s) can be removed from the rough strainer section 4 into the stirring tank 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pulper which disintegrates waste paper into pulp to facilitate the treatment of the next step.
The process of separating foreign matters such as retained metal and hot melt from the waste paper in the papermaking raw material can be performed extremely efficiently, and a large amount of papermaking raw material can be selected at once in the process. The present invention relates to a pulper that can be sent to the next process in a good condition.

[0002]

2. Description of the Related Art Conventionally, a pulper has been generally used in the initial step of pulping waste paper. This pulper is provided with a rotary blade in a stirring tank, and the rotary blade is rotated to rotate the tank. The liquid raw material is stirred together with the waste paper inside, and foreign matters such as retained metal and hot melt are separated from the waste paper by the rotary blade.

At this time, the waste paper in the papermaking raw material is separated into foreign matters such as retained metal and hot melt, and the fibrous material, which are separately collected, and the papermaking raw material containing only the fibrous material is sent to the next step. Papermaking raw materials containing foreign substances are returned to the stirring tank.

In order to perform the above-mentioned work, the bottom of the stirring tank is provided with a sorting chamber for collecting foreign matters such as retained metal and hot melt, and a sorting chamber for collecting only the fiber material.

[0005]

The above sorting chamber for foreign matters such as retained metal and hot melt, and the sorting chamber for fibrous materials are properly partitioned and provided at the bottom of the stirring tank. It is difficult to adapt when processing a large amount of raw material.

[0006]

Therefore, as a result of earnest studies to solve the above-mentioned problems, the inventor has found that the present invention provides a rough selection strainer plate having a large number of rough selection holes at the bottom of a stirring tank. Providing a selection strainer plate having a large number of selection holes at appropriate intervals below the rough selection strainer plate, and providing a rough selection room between the selection strainer plate and the selection strainer plate. A refinement chamber is provided on the lower side, an upper disaggregation rotary blade is provided on the upper surface of the coarse selection strainer plate, and a lower disaggregation rotary blade is provided on the upper surface of the coarse selection strainer plate. By using the pulper provided, not only can the separation of the selected papermaking raw material and the coarsely selected material be performed efficiently, but a large amount of the selected papermaking raw material can be used. Can be delivered to the process is obtained by solving the above problems.

[0007]

EXAMPLES Examples of the present invention will be described below with reference to the drawings. A papermaking raw material R (mainly a mixture of waste paper, chemicals and water) is flowed into the stirring tank 1 and stirred in the tank. The stirring tank 1 is mainly formed in a cylindrical shape,
As shown in FIG. 1, a rough selection strainer plate 2 is provided on the bottom surface portion 1a thereof, and a selection strainer plate 3 is provided below the rough selection strainer plate 2 at appropriate intervals.

The space formed between the rough selection strainer plate 2 and the fine selection strainer plate 3 is used as a rough selection chamber 4 (see FIG. 3). 5 is provided,
Further, an upper disaggregation rotary blade 6 is provided on the coarse selection strainer plate 2, and a lower disaggregation rotary blade 7 is provided on the fine selection strainer plate 3.

As shown in FIGS. 2 and 3, the rough selection strainer plate 2 has a large number of rough selection holes 2a, 2a ,.
, And similarly a large number of selection holes 3a, 3a, ... Are formed in the selection strainer plate 3.

The rough selection strainer plate 2 is provided so as to be substantially on the same plane as the bottom surface portion 1a, and the fine selection strainer plate 3 is provided one step below the bottom surface portion 1a of the stirring tank 1. Yes (see Figure 1).

A coarse selection chamber side wall 4a is provided in the coarse selection chamber 4 below the coarse selection strainer plate 2, and a selection chamber side wall 5a is provided in the selection chamber 5 below the selection strainer plate 3, respectively. Are configured.

The rough selection holes 2a, 2a, ... Of the rough selection strainer plate 2 are, as shown in FIG. 2, FIG. 3 and FIG.
It has a relatively large hole, and the strainer plate 3 is selected carefully.
Selected holes 3a, 3a, ... are small-diameter holes.
.. are formed finer than the rough selection holes 2a, 2a ,.

That is, in the coarse selection holes 2a, 2a, ... Of the coarse selection strainer plate 2, foreign matters s, s, such as retained metal, hot melt, etc., peeled off from the waste paper in the papermaking raw material R by stirring in the stirring tank 1. ... can be passed through, but only the fibrous materials f, f, ... Generated by disintegrating the waste paper by blocking the foreign matters s, s, ... In the selection holes 3a, 3a ,. Can be passed through (see FIG. 5).

Further, although the shapes of the rough selection holes 2a and the fine selection holes 3a are circular, they are shown as an example, but as other examples, although not shown, they may be elliptical or slit-like. However, the shape is not limited.

The above-mentioned "finely formed"
And the rough selection holes 2a, 2a, ... And the fine selection holes 3a, 3a,
When both and are circular, the diameter of the carefully selected hole 3a is the same as that of the roughly selected hole 2a.
When the fine selection hole 3a and the rough selection hole 2a are formed in a smaller size than the diameter, and the slit width of the fine selection hole 3a is smaller than the slit width of the rough selection hole 2a, When the fine selection hole 3a is circular and the rough selection hole 2a is a slit hole, the diameter is formed smaller than the slit width, and in the opposite case, the slit width is formed smaller than the diameter. It was done.

Further, the upper end portion of the drive shaft 8 is arranged in a penetrating state at the central portions of the rough selection chamber 4 and the fine selection chamber 5 and is directly connected to the upper disaggregation rotary blade 6 and the lower disaggregation rotary blade 7. As a matter of course, the drive shaft 8 is watertightly processed with respect to the stirring tank 1.

The drive shaft 8 is connected to the lower disaggregation rotary vane 7 of the coarse selection chamber 4, and the upper disaggregation rotary vane 6 rotates from the center of the lower disaggregation rotary vane 7 around the transmission shaft. In some cases, they can be connected (see FIGS. 1 to 3, etc.).

The drive shaft 8 is supported by a bearing portion 9 and is fixed to the lower end of the drive shaft 8 by a belt wheel 10 and is directly connected to a motor (not shown). The rotary blade 6 and the lower disaggregation rotary blade 7 are rotated.

The waste paper is fed into the stirring tank 1 containing white water or the like to become the papermaking raw material R, which is stirred by the upper disintegrating rotary blades 6, and the waste paper in the papermaking raw material R is stored in the upper disintegrating rotary blades 6. It is disintegrated into a fibrous f shape at the edge portion.

At the same time, the upper disintegrating rotary blades 6 and the coarsely selected strainer plate 2 are slashed, and foreign matters s, s, ... Then, the fiber material f,
coarse selection hole 2 of coarse selection strainer plate 2 with f, ...
It is sent to the rough selection room 4 from a, 2a, ....

Next, foreign matter s, s, ... such as retained metal and hot melt in the coarse selection chamber 4 is blocked by a selective strainer plate 3 as shown in FIG. 5, and its selective holes 3a, 3 are formed.
a, ... Can not pass through, and the lower disaggregation rotary blade 7
Is repelled around the rough selection chamber 4 by the rotation of and is returned to the stirring tank 1 from the rough selection chamber 4 via the return path 11.

Further, the carefully selected papermaking raw material R containing only the fibrous material f produced by the disintegration of waste paper is sent from the rough selection chamber 4 through the selection holes 3a, 3a, ... Of the selection strainer plate 3 to the selection chamber 5. Then, it is sent to the screen device or the like in the next process through the discharge path 12.

On the other hand, foreign matters s such as retained metal and hot melt,
The papermaking raw material R containing s, ... Is returned to the stirring tank 1 from the rough selection chamber 4 via the tubular return path 11 continuous to the stirring tank 1.
A separator T for separating foreign matter s, s, ... Is provided at an appropriate position on the return path 11 (see FIG. 4).

In the return path 11, as shown in FIG.
A pump P is provided, and first, the foreign matter s,
The papermaking raw material R containing a large amount of s, ... Outflows through the return path 11. At this time, foreign matter s, s, ...
The papermaking raw material R in the return path 11 is sucked up by the pump P, returns to the stirring tank 1 again, and this operation is repeated.

[0025]

In the present invention, the bottom portion 1 of the stirring tank 1
a is provided with a rough selection strainer plate 2 having a large number of rough selection holes 2a, 2a, ...
A large number of selection holes 3a, 3a
The selection strainer plate 3 having ... Is provided, and the selection screen 4 is provided between the selection strainer plate 2 and the selection strainer plate 3, and the selection strainer plate 3 is provided.
Is installed on the upper side of the coarse selection strainer plate 2 and the upper disaggregation rotary blade 7 is provided on the upper surface of the fine selection strainer plate 3, and the inside of the stirring tank 1 is placed in the stirring tank 1. By using the pulper provided with the return path 11 capable of removing the foreign matters s, s, ... Firstly, first, efficient and large-scale pulping of the waste paper melted in the papermaking raw material R in the stirring tank 1 is performed. It can be sent to the next process, and secondly, the foreign matters s, s, ... Can be removed very efficiently.

The above effect will be described in detail. A rough selection strainer plate 2 is provided on the bottom surface 1a of the agitation tank 1, and a fine selection strainer plate 3 is provided below the rough selection strainer plate 2. The rough selection strainer plate 2 and the fine selection strainer are provided. By forming the rough selection chamber 4 between the plate 3 and the space on the lower side of the fine selection strainer plate 3 as the fine selection chamber 5, first, only the rough selection strainer plate 2 is provided on the bottom surface 1a of the stirring tank 1. Will exist.

Therefore, the fibrous materials f, f, ...
The papermaking raw material R in the state of being separated into foreign matters s, s, ... Such as hot melt, also acts on its own weight to pass through the coarsely selected strainer plate 2 in a large amount, and a large amount of papermaking raw material R is sent to the next step. Things will come.

The foreign matters s, s, ... In the papermaking raw material R flow into the rough sorting chamber 4 from the rough strainer plate 2, so that the foreign matters s, s, ... Remain on the bottom surface 1a of the stirring tank 1. There is nothing to do.

Further, the foreign matter s, s, ... Is blocked by the selected strainer plate 3 and does not pass through, and the fiber materials f, f,
The papermaking raw material R containing only ...
Of the papermaking material R from which the foreign matters s, s, ... Are removed and can reach the selection chamber 5 and be sent to the next step such as screening.

Further, in the stirring tank 1, foreign matters s, s, such as retained metal and hot melt have already been separated from the waste paper in the papermaking raw material R by the upper disintegrating rotary blade 6, but the rough selection chamber 4 by the lower disaggregation rotary vane 7 provided in
It is possible to perform a stirring action in the inside to disintegrate the waste paper that has not been completely separated into fibrous materials f, f, ... Or to separate the foreign materials s, s ,.

Next, since the selection strainer plate 3 and the selection chamber 5 are present below the selection strainer plate 2 via the selection chamber 4, the papermaking raw material R flowing into the selection chamber 4 is Since the selection strainer plate 3 is entirely present immediately below, the high-quality papermaking raw material R containing only the fibers f, f, ... in the rough selection chamber 4 flows into the selection chamber 5 extremely efficiently. You can

Next, foreign matter s,
s, ... A return path 11 that can be removed is provided, and the papermaking raw material R that has flowed into the rough selection chamber 4 is separated into fibrous material f dissociated from the waste paper and foreign matter s, s, ... Then, the papermaking raw material R containing the foreign matters s, s, ... such as the retained metal and hot melt is fed from the rough selection chamber 4 through the return path 11 to the stirring tank 1.
However, the foreign matter s, s, ... Can be removed in the middle of the process, and the initial papermaking raw material R is not wasted.
The disaggregation work can be performed until s, ... Are completely removed.

[0033]

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a bottom surface portion of the present invention.

FIG. 2 is a perspective view of an essential part of the present invention.

[Fig. 3] Enlarged sectional view of the rough selection room and the selection room

FIG. 4 is a schematic view of a stirring tank provided with a return path.

[Fig. 5] Enlarged cross-sectional view of a coarsely selected strainer plate and a carefully selected strainer plate.

[Explanation of symbols]

 1 ... Stirring tank 1a ... Bottom part 2 ... Coarse selection strainer plate 2a ... Coarse selection hole 3 ... Careful selection strainer plate 3a ... Careful selection hole 4 ... Coarse selection chamber 5 ... Blade 11 ... Return path s ... Foreign matter

Claims (1)

[Claims] 1. A coarse selection strainer plate having a large number of rough selection holes is provided on the bottom surface of a stirring tank, and a fine selection strainer plate having a large number of fine selection holes is provided below the rough selection strainer plate at appropriate intervals. , A rough selection chamber between the rough selection strainer plate and the fine selection strainer plate, a fine selection chamber is provided below the fine selection strainer plate, and an upper disaggregation rotary blade is provided on the upper surface of the rough selection strainer plate, A pulper characterized by being provided with a lower disaggregation rotary vane and a return path capable of removing foreign matter from the rough selection chamber into the stirring tank.