JP2641847B2 - Stock washing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating drum type stock washing apparatus.

[0002]

2. Description of the Related Art As shown in Japanese Patent Application Laid-Open No. 61-83393, an unwashed stock is introduced into a drum through a stock inlet provided at one end of a drum while rotating a ventilation water drum horizontally. The stock is discharged, and the washed stock is discharged from the stock outlet provided at the other end, and the stock is stirred while supplying washing water while the stock reaches the outlet from the inlet, and the replacement washed liquid is drummed. 2. Description of the Related Art A rotary drum type cleaning device configured to discharge the drum downward through a peripheral wall is well known.

[0003] In the above-mentioned washing apparatus, for example, a spiral blade is provided as a stirring means while the paper material flows from the inlet to the outlet of the ventilation water-flowing drum, and the rotating action of the drum and the accompanying spiral blade are controlled. The stock is agitated in cooperation with the spiral feeding action, and the stock flock is dispersed and kneaded with washing water to perform replacement washing.

[0004]

However, the above-mentioned spiral blade is excellent in the feeding action of the stock, but since it only forms a single spiral passage, it lacks the dispersion effect of the stock flock, and There is a problem that flocs are easily generated in the spiral passage, and it is difficult to efficiently perform replacement cleaning with cleaning water.

Further, a stock layer is easily formed on the inner peripheral surface of the drum,
This reduces the filtering function and reduces the cleaning effect.

[0006] Although an example in which the spiral blade is used as the stirring means has been described, the conventional example generally has the same problem, and the solution thereof is a problem.

[0007]

SUMMARY OF THE INVENTION The present invention is to provide a rotary drum type stock rinsing apparatus which can appropriately solve the above problems.

As described above, according to the present invention, a material inlet is provided at one end of a rotatable water-permeable water drum, and a material outlet is provided at the other end. The washing water is supplied from the inlet to the outlet of the stock and the stirring of the stock is performed, and the filtrate (replacement washing water) is discharged below the drum to perform washing. The present invention relates to a stock washing device.

The present invention dramatically improves the cleaning effect of the rotary drum type paper stock cleaning apparatus. As a means for extending the circumferential direction along the inner peripheral surface of the vented water-permeable drum. Are arranged at intervals in the axial direction, a plurality of stock washing zones separated in the axial direction by the respective dam plates are formed between the respective dam plates, and the stock material washing zone is formed between the adjacent dam plates. A scraper for scraping the stock in the zone in the circumferential direction is arranged at intervals in the circumferential direction.

The stock fed from the stock inlet passes over the washing zones formed between the weir plates sequentially to reach the stock outlet, and with the rotation of the ventilation water drum. In each of the washing zones between the weir plates, the scraping plate repeats the circumferential scraping of the stock by the scraper and the falling by gravity.

The scraping plate extends in a direction crossing the weir plate at a right angle, or extends in a direction crossing the weir plate obliquely.

The scraping plate is provided with an opening for allowing the flow of the stock in the circumferential direction of the drum.
Part of it is made to flow backward.

As one embodiment of the opening, a space for flowing the stock is provided between the lower edge of the scraper and the inner peripheral surface of the drum.

In providing the stock flow port, the scraping plate is inclined so that the lower edge side of the scrap board forms a clearance angle with respect to the drum rotation direction, thereby facilitating the introduction of the stock into the stock flow port. .

[0015]

According to the present invention, the stock fed from one end of the vented water drum is repeatedly scraped up and down in the circumferential direction by the scraping plate in each washing zone formed between the weir plates. While passing over each washing zone (over each weir plate) from the stock inlet to the outlet, good stirring and stock dispersion are promoted during this period, and replacement washing is achieved. While the scraping plate passes through the bottom dead center of the drum, the stock held at the bottom of the drum is well agitated and the scraping and falling are performed.

The above promotes good dispersion of the stock in each washing zone and kneading of the stock with the washing liquid, thereby exhibiting a remarkable replacement washing effect. Filtrate is discharged through the peripheral wall of the drum in each washing zone of each stage partitioned by the weir plate, and the last stage washing zone holds the finely-washed stock separated from the others and is discharged from the stock outlet. .

At this time, the scraping plate is provided with a stock material sweeping action in the direction of rotation of the drum, and at the same time, a stock material flow opening for allowing a part of the stock material to flow backward is provided, so that the stirring in each of the washing zones can be performed. The cleaning effect is further improved.

By inclining the scraper as described above, the introduction of the stock into the stock passage is promoted.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a vented water-permeable drum 1 is rotatably mounted on a base 3 with shafts 2 projecting from both ends thereof.

As shown in FIGS. 1 and 2, the one shaft 2
Is formed by a tube shaft, and a stock feed pipe is connected to the stock shaft to form a stock inlet 4. A plurality of spaced-aparts are provided on the peripheral surface of the end of the drum 1 opposite to the stock inlet 4. The stock outlet 5 is formed.

That is, the vented water flow drum 1 has a stock inlet 4 at one end and a stock outlet 5 at the other end. The stock to be charged into the drum from the stock inlet is once charged into a small-diameter stock storage drum 22 provided in the drum 1 and a stock discharge port provided on the peripheral wall of the drum 22 at intervals. From 23, it is charged into the first washing zone 10 formed on the inner peripheral surface of the inlet end of the drum. The stock storage drum 22 is arranged concentrically with the inlet-side shaft portion 2, and a pipe of the shaft portion opens at the center thereof.

The stock thus charged into the drum flows toward the stock outlet 5, and during this time, the drum peripheral wall 8 having a ventilation and water flow structure.
Through which the displacement washing liquid (filtrate) is discharged.

The aeration water-permeable drum 1 hangs a conductor such as a drive belt around a shaft 2, for example, a wheel 6 provided on the shaft 2 on the stock material outlet side, and rotatably traverses the shaft, as shown in FIG. The entire drum is covered with a cover 24.

As a means for making the ventilation water-permeable drum 1 a ventilation water-permeable structure, a drum having a drum peripheral wall 8 formed of a net material is used. Alternatively, as shown in FIG. 4, the drum peripheral wall 8 has a rhombus-shaped wire rod 7 arranged side by side at a small interval in the circumferential direction to form a ventilation and water passing structure.

An annular weir plate 9 extending in the circumferential direction along the inner peripheral surface of the ventilation / drainage drum 1 is arranged at intervals in the axial direction. The weir plate 9 is integral with the drum peripheral wall 8 and axially partitions an annular space along the inner peripheral surface of the drum, and a plurality of washing zones 10 are juxtaposed axially between the respective weir plates 9.

As shown in FIG. 2, the stock shown by the arrow A, which has been introduced into the drum 1 from the stock inlet 4, is retained in each of the washing zones 10 between the dams by the damming action of the dam 9. While rotating the aeration and water supply drum 1, sequentially over each washing zone 10 (over each barrier plate 9 sequentially)
It reaches stock material exit 5.

The wires 7 extend in the axial direction through the weir plate 9, or the wires 7 are cut into lengths interposed between the weir plates 9, and each wire 7 is welded to the side surface of the weir plate 9. The wire 7 and the weir plate 9 are integrated to form a drum having countless minute slits 7 ′ between the wires 7.

The outer ring 1 is provided on the outer peripheral surface of the wire 7 in the circumferential direction.
The outer rings 11 are arranged in an annular manner integrally with the drum, and the outer rings 11 are arranged at intervals in the axial direction, and the outer rings 11 are connected by connecting bones 25 as shown in FIG. 1 to increase the rigid structure. .

In FIG. 2, the outer peripheral portion of the annular weir plate 9 is annularly projected outward of the drum 1, and the outer ring 11 is formed by the projected portion.
5, and the end of the wire 7 is welded to the side surface of the weir plate 9 forming the outer ring 11.

The weir plate 9 does not hinder partial interruption in the middle of the extension length in the circumferential direction and does not hinder the opening of the stock flow opening on the side surface.

Further, scraping plates 12 extending in a direction crossing the weir plate 9 are arranged at intervals in the circumferential direction of the drum. The scraping plates 12 between the weir plates 9 are arranged in a line in the axial direction of the drum 1 as shown in FIG. 2 and are arranged at intervals in the circumferential direction of the drum 1 or as shown in FIG. Scraper 1 between dams 9
2 are arranged with a phase shift in the circumferential direction with respect to the scraping plate 12 between the adjacent weir plates 9. That is, a staggered arrangement is used.

As shown in FIG. 2, the scraping plate 12 is connected at both ends thereof to the weir plate 9 by welding or the like, or a gap is formed between both ends of the scraping plate 12 and the weir plate 9 (not shown).

As shown in FIG. 2, when the scraping plates 12 are arranged in a line, a single weir plate extending over a plurality of washing zones 10 can be provided crosswise with a plurality of weir plates 9 while being passed therethrough. . The scraping plate 12 is oriented in a direction crossing the weir plate 9 at right angles as shown in the figure, or in a direction crossing obliquely.

As described above, the flow of the stock A introduced into the drum 1 through the stock inlet 4 is suppressed by the weir plate 9 and retained in each washing zone 10 between the weir plates 9 as shown in FIG. reaches the outlet 5 by overflowing each cleaning zone 10 while being supplied wash water sequentially overcome by, as indicated by arrows a _1, in the cleaning zone 10 as shown in between Figure 3, the drum bottom by the scraper 12 It is swept up in the circumferential direction and falls down to the vicinity of each drum side dead center. This operation is repeated in each cleaning zone 10.

Near the side dead center of the drum 1, a shower pipe 13 extends outside the drum 1 along the axial direction. Further, a drum cleaning shower 26 is provided at the end of the shower pipe 13. As shown by arrow B in FIG. 2, the shower pipe 13 is washed by the scraping plate 12 while separating the stock on the inner peripheral surface of the drum into the drum by water pressure from outside the drum. Water is supplied into the drum 1. A stock diluted with the washing water is held in the inner bottom of the drum 1.

While the stock A 'flowing in the lower part of the drum 1 is scraped up by the scraper 12, the falling is repeated.

The scraping plate 12 is stirred while passing through the stock liquid held at the bottom of the drum. While thereby satisfactorily agitated to disperse the stock, washed water and kneaded, the peripheral wall of the vent water flow structure of the drum 1 in each of the washing zone 10 each as displacement washing water shown by an arrow B ₁ in FIG. 2 8 (Through a slit 7 'between the wires 7) and discharged as a filtrate below the drum.

As shown in FIGS. 1 and 2, the filtrate (replacement washing water) in each of the washing zones 10 is collected in a safe oar 14, and the fiber content is collected through a vortex cleaner 15 to be reused. Offer.

That is, the replacement washing liquid filtered and discharged to the lower side of the drum contains a considerable amount of fine fibers together with white water, ink components and contaminants, and causes the cleaner 15 to vortex upward from below. Then, the fiber is floated to the liquid surface and collected.

Thus, in the final washing zone, the finely-washed stock is separated and secured from the other zones, and is discharged downward to the drum while overflowing the stock to the stock outlet 5. This high quality paper wash is supplied as a papermaking raw material.

As another example of the washing zone 10,
Although not shown, the above-mentioned scraping plate 12 is not provided in one or more of the last-stage washing zones, and the washing zone is simply divided by the weir plate 9.

Hereinafter, another embodiment of the present invention will be described in further detail with reference to the drawings.

As shown in FIG. 2, an internal cleaning water supply pipe 17 is arranged in the drum 1 along the axis.

One end of the internal cleaning water supply pipe 17 is connected to the shaft portion 2 on the stock material outlet side, and the shaft portion 2 is formed by a tube shaft. The washing water is supplied from the washing water discharge port 18 provided in the middle of the length of the pipe 17, and the washing water indicated by the arrow B 'in FIG.

This washing water B 'is supplied to a washing zone 10 near the middle arranged in the drum as shown. Alternatively, supply of the cleaning water B ′ to the plurality of cleaning zones 10 is not prevented.

A plurality of discharge ports 18 are provided in the middle part of the pipe 17 in the axial direction, and a water-impervious ring 19 for selectively closing the discharge ports 18 is extrapolated to the pipe 17. 17 is moved along the outer surface thereof, and the unused discharge port 18 is closed by tightening. Thus, the position for supplying the cleaning water B 'can be selected.
The washing water supply pipe 17 and the washing water supply shower pipe 13 can be selectively used.

The scraping plate 12 is provided with one or a plurality of openings for allowing a part of the stock material scraped up in the circumferential direction of the drum to flow backward in the direction opposite to the scraping direction.

As an example of the above-mentioned stock flow port, as shown in FIG. 2, an interval is provided between the lower edge of the scraping plate 12 and the inner peripheral surface of the drum 1, and this is used as the stock flow port 20. .

A stock A 'held at the inner bottom of the drum 1
Is swirled up by the scraper 12 while being turbulently flown. During this time, a backflow is promoted through the stock flow port 20 to promote agitation and dispersion.

As another example of the stock flow port, a scraping plate 12
Is disposed so as to substantially contact the inner peripheral surface of the drum, and is formed by opening one or more holes 21 penetrating through the side surface of the scraping plate 12 as shown by the broken line in FIG.

As shown in FIG. 4, the stock A _{2 that} has flowed back through the stock flow port 20 flows along the inner peripheral surface of the drum while colliding with the scraper plate 12, and flows back along the inner peripheral surface of the drum. lower portion a ₃ is a drum wall of the stock a _2, in particular greater than ride repeat the ridge while receiving resistance of the wire 7 of the rhombic or triangular, during which good dispersion is promoted.

When the dispersion is satisfactorily induced, the displacement washing with the washing water is efficiently performed.

As an example, the scraping plate 12 is inclined at its lower edge so as to have a clearance angle with respect to the drum rotating direction.

As shown in FIG. 4, when the drum 1 rotates in one direction and the scraper 12 scrapes up the stock at the bottom of the drum, the stock A ₂ hits the scraper 12 and is guided on the inclined surface thereof. Then, the flow velocity is rapidly increased to flow into the stock material inlet 20 and flow out. This and dispersed and displacement washing of the fibers is accelerated by quickly displacement wash from the slit 7 'of the drum wall 8 in contact with the flow of the paper stock A _2, A ₃ is discharged as the filtrate.

The paper stock is actively stirred along the inner peripheral surface of the drum, so that clogging can be prevented well.

These are basically due to the fact that the scraper 12 is provided to activate the stock in contact with the inner peripheral surface of the drum.

The above-mentioned drum is suspended horizontally. The suspension angle is horizontal, or the drum is suspended such that the stock outlet 5 has a slight downward slope.

[0058]

According to the present invention, the effect of dispersing fibers and the effect of replacing and cleaning (deinking and dedusting effects) in the rotary drum type cleaning device are remarkably improved, and a reduction or rationalization of the cleaning device is achieved. It offers epoch-making improvements, such as the ability to provide a high-quality paper washing fee.

In addition, the problem that a stock layer is formed on the inner peripheral surface of the drum to reduce the filtering function is improved, and the operation can be performed soundly for a long period of time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the whole stock washing apparatus with a part cut away.

FIG. 2 is a vertical cross-sectional view of a ventilation / water-flow drum section in the apparatus.

FIG. 3 is a cross-sectional view illustrating the operation of the drum unit.

FIG. 4 is an enlarged sectional view of a portion C in FIG. 3;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 ventilation water drum 4 stock inlet 5 stock outlet 7 rhombus wire 8 drum peripheral wall 9 dam plate 10 washing zone 12 scraper plate 13 washing water supply shower pipe 17 internal washing water supply pipe 20 paper inlet

Claims (4)

(57) [Claims] 1. A stock water supply drum is provided at one end of a rotatably mounted water-permeable drum and a stock material outlet at the other end thereof. In the furnishing apparatus provided, the weir plates extending in the circumferential direction along the inner peripheral surface of the ventilation water drum are arranged at intervals in the axial direction, and the weir plates are arranged between the respective weir plates in the axial direction. While forming a plurality of stock washing zones partitioned into, a scraping plate that scrapes up the stock liquid in the stock washing zone in the drum rotation direction between the adjacent weir plates is arranged at intervals in the circumferential direction, The stock fed from the stock inlet sequentially passes over each stock washing zone formed between the weir plates and reaches the stock outlet, and at each stock washing zone between the weir plates, there is a vented water-flow drum. Repeat the scraping of the stock in the circumferential direction by the scraper and the falling by gravity due to the rotation. Stock cleaning apparatus characterized by constituting the. 2. A stock washing apparatus according to claim 1, wherein an opening is formed in said scraping plate to allow the flow of stock in the circumferential direction. 3. The space according to claim 1, wherein a gap is formed between a lower edge of said scraping plate and an inner peripheral surface of said ventilation water-permeable drum so as to allow a flow of stock in the circumferential direction. Stock rinsing equipment. 4. The paper stock washing apparatus according to claim 1, wherein said scraping plate is inclined so as to form a clearance angle at a lower edge side with respect to a rotation direction of the ventilation water-permeable drum.