JPH0140155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a separation device used in the paper and pulp industry to separate undisintegrated fibers and non-fibrous substances from a raw material fiber suspension.

(b) Prior Art In the paper and pulp industry, a rotary separator as shown in FIG. 7 is known as a device for separating undisintegrated fibers and non-fibrous substances from a raw material fiber suspension.

In this system, a perforated cylinder 1 is installed horizontally by support rollers 2, and the perforated cylinder 1 is rotated by transmitting the rotation of a motor 3 to the perforated cylinder 1 through a transmission means 4 such as a gear. Supply pipe 5 to one end of cylinder 1
The raw material fed in is moved toward the raw material outlet 7 by a spiral thread 6 attached to the inside of the perforated cylinder 1, and water is sprinkled on the raw material from the outside of the perforated cylinder 1 by a shower 8 to loosen the disintegrated fibers. The suspension is dropped into a collection tank 9 through the holes of the perforated cylinder 1, and the undisintegrated fibers and non-fibrous substances are discharged from the outlet 7 of the perforated cylinder 1 into the receiving tank 10 to be separated from the disintegrated fiber suspension. This is convenient because the separation process is performed continuously.

(c) Problems to be Solved by the Invention However, when observing the separated undisintegrated fibers and non-fibrous substances of the conventional products mentioned above, it is found that the useful fibers useful as raw materials for papermaking are 0.1 in weight ratio to the input raw material. It contains about 0.3%, and there was a problem that this amount of useful fiber was wasted.

Therefore, the present invention solves the above-mentioned conventional problems by providing one or more parts in the middle of the perforated cylinder for washing and diluting the raw material, and recovering useful fibers from the separated product. .

(d) Techniques for solving the problems The present invention includes a perforated cylinder installed horizontally and rotated by power, and one or more perforated cylinders provided in the middle of the perforated cylinder so as to have a diameter larger than that of the perforated cylinder. a water storage section; a water supply means arranged inside the perforated cylinder for supplying water to the water storage section; and a water supply means arranged inside the perforated cylinder for supplying water to the water storage section; The feeding piece is provided at an angle with respect to the axis of the perforated cylinder, or means is provided for tilting the lower peripheral surface of the perforated cylinder so that the raw material is sent from the inlet side to the outlet side.

(e) Effect The present invention provides that when a perforated cylinder is rotated and raw material is supplied to the inlet side, the raw material is fed by the feeding piece or the inclination of the lower circumferential surface and advances inside the perforated cylinder, and during this time, the fibers that can pass through the hole are fed into the perforated cylinder. The suspension is sequentially discharged to the collection tank, and the remaining raw materials fall into the water storage section, where they are stirred and washed in the water stored here, and also washed with water supplied from the water supply means, and the disintegrated fibers are left undissolved. Disintegrated fibers and non-fibrous substances are washed away from the separated material, further absorbed by washing water to be diluted, and then proceed to the next perforated cylinder for effective separation, resulting in useful fibers being mixed into the separated material. is reduced to 1/10 of the conventional one mentioned above.

(f) Embodiment An example of the implementation of the apparatus related to the present invention will be described based on the drawings.

FIG. 1 shows the entire device. In the figure, 11 is a perforated cylinder with a hole 18 on its circumference. Tires 12 are provided at both ends of the outer periphery of the perforated cylinder 11 and, if necessary, in the middle. 12, and this tire 12,1
2 is rotatably supported by rollers 14, 14 which are pivotally supported by legs 13, 13, and a gear 15 is fixed to one end of the perforated cylinder 11, which is the left end side in the figure. A pinion 17 attached to the shaft is engaged to rotate the perforated cylinder 11, and the size of the hole 18 in the perforated cylinder 11 is selected depending on the purpose of sorting. Holes are provided from the inside to the outside, and each section of the perforated cylinder divided by the water storage section 19 may have the same size; Differences may be made so that the hole size becomes smaller as the divisions are reached. That is, the dimensions of the holes 18 are smaller on the outlet side than on the raw material inlet side. This is because the amount of useful fibers in the raw material to be treated decreases as it progresses from the raw material inlet side to the foreign matter outlet side, and the amount of foreign matter increases.

Reference numeral 19 denotes a water storage portion provided at one or more locations in the middle of the perforated cylinder 11, which is formed to have a diameter larger than that of the perforated cylinder 11 so that water can be stored in this portion. Depending on the diameter of the water storage part 19, one or two or more pumping blades 20 are provided inside to pump out the accumulated water to the rear side of the perforated cylinder 11 in the direction of movement of the raw material.

Reference numeral 19' indicates another embodiment of the water storage section described above, and in this example, the perforated cylinder 11 on the upstream side and the perforated cylinder 11 on the downstream side with respect to the raw material flow are treated as shown in Figure 3 of the drawing. Depending on the diameter of the water storage portion 19', one or two stirring members 21 are provided, each having a radius difference a corresponding to the amount of water, and having a shape that prevents fibers or non-fibrous substances from getting entangled inside.

22 is a water supply means for supplying water to the water storage section 19 or 19', which is disposed inside the perforated cylinder 11, and uses a shower pipe inserted into the perforated cylinder 11 from the raw material outlet 23, whereby water is supplied to the raw material. Water is supplied to the water storage section 19 or 19' through the water storage section 19 or 19'.

Reference numeral 24 denotes a feed piece attached to the inside of the above-mentioned perforated cylinder 11, which is tilted with respect to the axis of the perforated cylinder 11, and feeds the raw material from the inlet side to the outlet 23 side by rotation of the perforated cylinder 11. It is formed in a spiral shape so that it can be fed, and the pitch is set so that the desired feeding speed can be obtained.

Reference numeral 24' indicates another embodiment of the raw material feeding piece described above, and in this example, as shown in FIG. 4, the raw material is fed from the inlet side to the outlet side by rotation of the perforated cylinder 11. Several inclined plates are attached, and their number and angle of inclination are determined so as to set the desired feed rate.

Reference numeral 25 denotes a raw material supply pipe inserted into the inlet side of the perforated cylinder 11 described above, through which the raw material is fed into the inlet side of the perforated cylinder 11 through a downward opening 26.

Reference numeral 27 denotes a shower pipe provided outside the perforated cylinder 11, which sprays water onto the perforated cylinder 11 from the outside to remove clogging of the holes 18 and replenish cleaning water.

Reference numeral 28 denotes a recovery tank for selected raw materials provided at the bottom of the perforated cylinder 11, which receives the suspension of useful fibers that has passed through the holes 18 of the perforated cylinder 11, stores it, and sends it to the next process through the discharge pipe 29.

5 and 6 show an embodiment in which the lower circumferential surface of the perforated cylinder 11 is inclined as a feeding means for the raw material, and the one shown in FIG. Rollers 14, 14 have tires 12, 12 pivotally supported on legs 13, 13 with a slight height difference h.
The axis of the perforated cylinder 11 is tilted by 2° to 8° with respect to the horizontal line, and its lower peripheral surface is tilted with respect to the horizontal line by the same angle, and this inclination allows the raw material to move from the inlet side to the outlet side. It is designed to be moved.

In addition, in the case shown in FIG. 6, the perforated cylinder 11 is formed into a tapered shape such that the cross-sectional area is wider on the outlet side than on the inlet side, and the perforated cylinder 11 is formed so that the axis thereof coincides with the horizontal line. Even if the pipe is installed in a pipe, its lower circumferential surface is inclined by about 2° to 8° from the horizontal line due to the taper t, and this inclination causes the raw material to move from the inlet side to the outlet side.

In the apparatus shown in FIG. 1 of the above embodiment, the holes 18 of the perforated cylinder 11 of the raw material disintegrated with a pulper etc.
Disaggregated fibers that can pass through (hereinafter referred to as passing portion) and holes 18
When a material containing undisintegrated fibers and non-fiber substances (hereinafter referred to as non-filterable materials) that cannot pass through is supplied from the opening 26 of the supply pipe 25 to the inlet side of the perforated cylinder 11, the raw material is separated by the spiral thread 24. The raw material is transferred inside the perforated cylinder 11 to the outlet 23 side, and during this time, the raw material passing through the perforated cylinder 1
1 is discharged together with water to the lower recovery tank 28 through the hole 18, and the unpassed water increases in concentration due to dehydration and advances towards the water storage section 19, where it is concentrated to about twice the inlet concentration. has been done.

However, at this time, the raw material is sent to the water storage section 19 where the water supplied by the water supply means 22 is stored and is diluted, and the unfiltered materials that have become difficult to disperse due to concentration are dispersed well, and the unfiltered materials that have been attached to these materials are dispersed. The raw material is adjusted to the same conditions as the inlet side, and the adjusted raw material is pumped out to the rear perforated cylinder 11 by the pumping blade 20, and this perforated cylinder 1
1 is sent to the outlet 23 side by the spiral strip 24, during which time the passed portion falls into the recovery tank 28 through the hole 18 and is collected, and the non-passed portion is continuously discharged from the outlet 23 of the perforated cylinder 11 to the receiving tank. A careful selection will be made.

Examining the raw material concentration in each part during this selection, when the inlet concentration is 3%, it increases to about 5 to 8% (6% on average) immediately before the water storage part 19;
Immediately after dilution, the concentration decreased to about 2 to 3%, which was lower than the inlet concentration, but this concentration can be adjusted by adjusting the amount of dilution water.

In addition, when examining the processing capacity in terms of the amount of material passing through the perforated cylinder, it is 1.5 times that of the conventional equipment for roll paper with a paper tube, and 1.35 times that of the conventional equipment for general waste newspaper. When examining the amount of useful fiber mixed in, it was found that it was about 1/10 of the amount of the conventional equipment, and the amount of inlet raw material was reduced.
It was only 0.01%.

The apparatus according to the present invention includes the embodiment shown in FIG. 4 which uses an inclined plate for feeding the raw material, and the embodiment shown in FIG.
There are embodiments shown in FIGS. 5 and 6 in which the lower circumferential surface is inclined, but the effects of these embodiments are as follows.
Since there is no particular difference from the embodiment shown in FIG. 1 described above, the explanation will be omitted.

Since the device according to the present invention dilutes and washes the raw material in the water storage part in the middle of the perforated cylinder, the screening ability is greatly improved, and the amount of useful fibers mixed in the non-passed material is significantly reduced. By improving the performance, the length of the perforated cylinder can be shortened to 70 to 80% of that of the conventional device, which has the unique effect of downsizing the device and saving power.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal front view showing an example of an implementation of the apparatus according to the present invention. Figure 2 is a side view of the same as above. FIG. 3 is a partial sectional view showing another embodiment of the water storage section. FIG. 4 is a longitudinal sectional front view showing another embodiment of the sending piece. FIG. 5 and FIG. 6 are external views showing the tilting means of the perforated cylinder.
FIG. 7 is a longitudinal sectional front view showing a conventional device. In the figure, 11 is a cylinder with holes, 19 and 19' are water storage parts,
22 is a water supply means, 24 is a sending piece, and h and t are tilting means.

Claims (1)

[Claims] 1. A perforated cylinder installed horizontally and rotated by power, one or more water storage parts provided in the middle of this perforated cylinder and having a diameter larger than the perforated cylinder, and this water storage part. a water supply means disposed inside the perforated cylinder to supply water to the perforated cylinder; and a water supply means disposed inside the perforated cylinder to supply water to the perforated cylinder; 1. A rotational separation device for a fiber suspension, characterized in that it is provided with a feed piece that is provided at an angle with respect to the feed piece. 2. The fiber suspension according to claim 1, wherein the perforated cylinder has a hole on its circumferential surface, and the size of the hole is smaller on the outlet side than on the raw material inlet side. Rotary separation device. 3. A rotary separation device for a fiber suspension according to claim 1, characterized in that the feed piece provided inside the perforated cylinder to send the raw material from the inlet side to the outlet side has a spiral shape. 4. The rotary separation device for a fiber suspension according to claim 1, wherein the feeding piece provided inside the perforated cylinder to send the raw material from the inlet side to the outlet side is an inclined plate. 5. A perforated cylinder installed horizontally and rotated by power, one or more water storage parts provided in the middle of this perforated cylinder and having a diameter larger than the perforated cylinder, and for supplying water to this water storage part. and a water supply means disposed inside the perforated cylinder, and a means for tilting the lower circumferential surface of the perforated cylinder so that the raw material is sent from the inlet side to the outlet side. A rotary separation device for fiber suspension. 6. The fiber suspension according to claim 5, wherein the perforated cylinder has a hole on its circumferential surface, and the size of the hole is smaller on the outlet side than on the raw material inlet side. Rotary separation device. 7. As the tilting means for tilting the lower circumferential surface of the perforated cylinder to send the raw material from the inlet side to the outlet side, a means for tilting the axis of the perforated cylinder so that the outlet side is lower than the inlet side is adopted. A rotary separation device for fiber suspension according to claim 5. 8. As the inclination means for tilting the lower circumferential surface of the perforated cylinder to send the raw material from the inlet side to the outlet side, a means for forming the perforated cylinder in a tapered shape that is wider on the outlet side than on the inlet side is adopted. A rotary separation device for fiber suspension according to claim 5.