JP4551012B2 - Floatator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention blows bubbles from the lower part of the treatment tank to which the used paper raw material liquid is supplied, and causes the ink particles intervening in the used paper raw material liquid to adhere to the surface of the bubbles to overflow from the upper part of the treatment tank. The present invention relates to a floatator for removing ink particles from a raw material liquid.
[0002]
[Prior art]
In general, recycled paper is obtained by disaggregating used printed paper, removing ink adhering to the used paper fiber, selecting and dewatering, and then paper-making it again. In this case, the matter related to the deinking process for removing ink from the used paper fiber is an important factor that greatly affects the time required for the subsequent selection process and the manufacturing cost and quality of recycled paper.
[0003]
In the floater for performing used paper deinking treatment, bubbles are blown into the separated and chemical-treated used paper raw material liquid, and the ink particles released from the used paper fibers in the used paper raw material liquid are turned into bubbles rising in the used paper raw material liquid. The ink particles in the used paper raw material liquid are removed by removing the floss that adheres to the surface of the used paper raw material liquid, that is, the bubbles to which the ink particles are attached, from the used paper raw material liquid. In this case, it is important to obtain a large deinking effect by supplying fine bubbles evenly in the waste paper raw material liquid and increasing the chances of the ink particles floating in the waste paper raw material liquid coming into contact with the bubbles. For example, as disclosed in Japanese Examined Patent Publication No. 6-60473 and the like, various floatators have been conventionally proposed.
[0004]
The floater disclosed in Japanese Patent Publication No. 6-60473 has a rotary diffuser pipe arranged at the lower part of a plurality of processing tanks connected in series, and is protruded from the outer peripheral surface of each diffuser pipe. While ejecting fine bubbles from a large number of air blowing nozzles, the waste paper raw material liquid is sequentially supplied from the processing tank on the most upstream side to the processing tank on the most downstream side, and by removing the floss for each processing tank, Finally, the used paper raw material liquid from which the ink particles are substantially removed is taken out from the most downstream processing tank.
[0005]
[Problems to be solved by the invention]
In order to obtain a large deinking effect on used paper, it is effective to supply fine bubbles evenly in the used paper raw material liquid and to bring the ink particles floating in the used paper raw material liquid into sufficient contact with the bubbles. For this reason, the diffuser tube tends to be elongated along the longitudinal direction, and it is desirable that the used paper raw material liquid supplied into the treatment tank is spread over the entire longitudinal direction of the diffuser tube.
[0006]
However, in the conventional floatator disclosed in Japanese Patent Publication No. 6-60473 or the like, the opening width of the raw material supply port formed in each processing tank does not extend in the entire longitudinal direction of the air diffuser. It is difficult to uniformly disperse and supply the used paper raw material liquid into the treatment tank along the longitudinal direction of the trachea, and in particular, a stagnation phenomenon of the used paper raw material liquid intervenes below both ends in the longitudinal direction of the diffuser pipe occurs. For this reason, the waste paper raw material solution located at both ends in the longitudinal direction of the diffuser tube is more likely to be exposed to a larger amount of bubbles than the waste paper raw material solution located at the longitudinal center of the diffuser tube, and the progress of deinking is scattered. It has a distribution along the longitudinal direction of the trachea, which is a cause of lowering the deinking efficiency of the treatment tank, and thus the entire flowtater.
[0007]
Furthermore, since an independent diffuser pipe is assembled for each processing tank, the equipment as a flow meter becomes complicated and the number of parts is large, and there is a problem that the maintenance and inspection work is time consuming.
[0008]
OBJECT OF THE INVENTION
An object of the present invention is to provide a flowtater capable of uniformly distributing and supplying waste paper raw material liquid into a processing tank along the longitudinal direction of an air diffuser and reducing the number of parts, thereby reducing the size of equipment. There is to do.
[0009]
[Means for Solving the Problems]
In the first aspect of the present invention, bubbles are blown from the lower part of the treatment tank to which the used paper raw material liquid is supplied, ink particles intervening in the used paper raw material liquid are attached to the surface of the bubbles, and the bubbles are removed from the processing tank. A flowtater that overflows from the upper part of the waste paper and removes the ink particles from the waste paper raw material liquid, and is disposed so as to penetrate at least two treatment tanks and the lower part of these treatment tanks. A diffuser tube having a plurality of diffuser ports formed therein, an air supply means for supplying compressed air into the diffuser tube and ejecting bubbles from the diffuser port, and the diffuser tube located in the treatment tank respectively open and close directly below or directly below the, the raw material discharge port for discharging the raw material inlet for introducing the waste paper raw material liquid to the treatment tank, the waste paper raw material liquid in the processing tank, respectively, The raw material of one of the treatment tanks Comprising a material transfer passage connected to said feed inlet of the treatment tank outlet and the other leads to the waste paper raw material liquid of the one of the processing liquid tank in the processing liquid tank of the other, the raw material inlet is the It extends along the longitudinal direction of the diffuser tube, and its width dimension substantially coincides with the corresponding width dimension of the treatment tank along the longitudinal direction of the diffuser pipe .
[0010]
In the second embodiment of the present invention, bubbles are blown from the lower part of the treatment tank to which the used paper raw material liquid is supplied, ink particles intervening in the used paper raw material liquid are attached to the surface of the bubbles, and the bubbles are removed from the processing tank. A flowtater that overflows from the upper part of the waste paper and removes the ink particles from the waste paper raw material liquid, and is disposed so as to penetrate at least two treatment tanks and the lower part of these treatment tanks. A diffuser tube having a plurality of diffuser ports formed therein, an air supply means for supplying compressed air into the diffuser tube and ejecting bubbles from the diffuser port, and the diffuser tube located in the treatment tank each opening in proximity to just below or just below, a raw material inlet for introducing the waste paper raw material liquid to the treatment tank, disposed adjacent respectively to the processing tank, the waste paper raw material liquid in the processing bath Introducing from the upper end and the lower end A raw material transfer passage for connecting the gas-liquid separation tank for discharging the waste paper raw material liquid, a lower end portion of the gas-liquid separation tank adjacent to the one processing tank, and the raw material introduction port of the other processing tank The raw material introduction port extends along the longitudinal direction of the diffuser tube, and the width dimension thereof substantially matches the width dimension of the corresponding treatment tank along the longitudinal direction of the diffuser pipe. It is characterized by.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the first and flows stator according to the second embodiment of the present invention, open on the outer peripheral surface of the trachea diffuser port diffuser, the circumferential length of the opening air diffuser along the axis of the diffuser tubes is diffusing pipe It may be set larger than the width dimension of the air diffuser along .
[0013]
You may have a rotation drive means for driving and rotating a diffuser tube.
[0014]
The opening ratio of the air diffuser opening in the outer peripheral surface of the air diffuser may be different for each processing tank.
[0015]
In the floater according to the second aspect of the present invention, the treatment tank and the gas-liquid separation tank adjacent thereto are partitioned by a partition plate whose upper end is at a position lower than the liquid level of the used paper raw material liquid in the treatment tank, The waste paper raw material liquid in the treatment tank may be introduced into the gas-liquid separation tank from a weir formed at the upper end of the partition plate.
[0016]
【Example】
An embodiment of the flowator according to the present invention will be described in detail with reference to FIGS. 1 to 5, but the present invention is not limited to such an embodiment, and other technologies including similar problems are included in the present invention. Can also be applied.
[0017]
A schematic structure of a flowator in the present embodiment is shown in FIG. That is, the treatment tanks 12 a, 12 b, 12 c, 12 d (hereinafter sometimes referred to collectively as “12”) into which a predetermined amount of the used paper raw material liquid 11 is respectively introduced through the partition wall 13. Connected to each other. In the center of the lower ends of these treatment tanks 12, one aeration tube 14 is arranged in a state of penetrating these four treatment tanks 12.
[0018]
The appearance of the air diffuser 14 in this embodiment is shown in FIG. 2, and the cross-sectional structure of the air diffuser is shown in FIG. That is, the diffuser pipe 14 in the present embodiment is integrally formed on the cylindrical drum portion 15 located in the processing tank 12 and on both sides in the longitudinal direction of the drum portion 15, and is the most upstream in the flow direction of the used paper raw material liquid 11. A pair of extending portions 16 projecting from the outer walls of the first and fourth treatment tanks 12a and 12d located on the side and the most downstream side, and one of these extending portions 16 (left side in FIG. 1), An air inlet port 18 that is airtightly connected to a compressor (not shown) via a rotary joint 17, a pair of rotating shafts 19 protruding from the pair of extending portions 16, and an opening on the outer peripheral surface of the drum portion 15, and used paper raw material liquid 11 has a plurality of air diffusers 20a, 20b, 20c, 20d (hereinafter, these may be abbreviated as 20 collectively) for blowing out bubbles. The outer wall of each of the first and fourth treatment tanks 12a and 12d located on the most upstream side and the most downstream side in the flow direction of the waste paper raw material liquid 11, and the partition wall 13 that partitions the treatment tanks 12 adjacent to each other, and this air diffuser A sealing mechanism (not shown) for preventing the waste paper raw material liquid 11 from leaking from between the outer peripheral surfaces of 14 is incorporated.
[0019]
The pair of rotating shafts 19 are rotatably supported by a pair of bearings 21, and a shaft coupling 22 provided on one rotating shaft (left side in FIG. 1) drives and rotates the air diffuser 14 at a predetermined speed. A drive source (not shown) is connected.
[0020]
Accordingly, the drive source is operated to rotate the diffuser pipe 14 in the direction of the arrow in FIGS. 2 and 3, while supplying a predetermined flow rate of compressed air from the compressor into the rotary joint 17 through the air supply pipe 23. Is introduced into the drum portion 15 from the air introduction port 18, so that fine bubbles are jetted from the individual air diffusion ports 20 into the used paper raw material liquid 11 stored in the treatment tank 12.
[0021]
The rotational speed of the air diffuser 14 is extremely important in combination with the amount of compressed air supplied to the air diffuser 14 when the compressed air ejected from the air diffuser 20 forms fine bubbles in the used paper raw material liquid 11. It is effective to set the peripheral speed of the drum portion 15 to be equal to or higher than the peripheral speed of the drum portion of the conventional air diffuser, for example, about 9 to 15 meters per second. However, since the driving load increases rapidly as the air diffuser 14 increases in speed, it is more preferable to set it to about 12 meters per second in consideration of the efficiency for the obtained effect.
[0022]
In the present embodiment, the aperture ratio of the air diffuser 20a that opens to the drum portion 15 facing the first processing tank 12a (the area of the outer peripheral surface of the drum section 15 that intervenes in each processing tank 12 is scattered here. The ratio of the total opening area of the air vents 20) is the largest, and the drum portion facing each processing tank 12 so that the opening ratio of the air diffuser 20d opening to the drum section 15 facing the fourth processing tank 12d is the smallest. Although the aperture ratios of the 15 air diffusers 20 are changed, they may all be set to the same aperture ratio, or the air diffusers 20b, 20c of the drum portion 15 facing the second and third treatment tanks 12b, 12c. The opening ratio of the air diffusers 20a and 20d of the drum portion 15 facing the first and fourth treatment tanks 12a and 12d may be set smaller than this. The change in the aperture ratio can be dealt with by changing the number of air diffusers 20 or the opening area of each air diffuser 20. Further, the width dimension W (see FIG. 3) of each air diffuser port 20 along the circumferential direction of the drum portion 15 is set to be approximately the same as the inner diameter of the air blowing nozzle in the conventional air diffuser, that is, approximately 20 to 30 mm. However, it is effective to set the length of each air diffuser port 20 along the axial direction of the drum portion 15 to be larger than the width dimension W of each air diffuser port 20. It is preferable to set the length of 20 to about 3 times the width W thereof. However, depending on the size of the floatator and its operating conditions, it is of course possible to make the length of the air diffuser 20 about 1.5 to 4 times its width W.
[0023]
Thus, since the air diffuser 20 formed in the drum portion 15 of the air diffuser 14 in the present embodiment is elongated three times longer than the conventional air blowing nozzle, the number of air diffusers 20 Can be suppressed to about 1/3 of the number of air blowing nozzles. Further, since the air diffuser 14 in this embodiment does not need to be retrofitted to the outer peripheral surface of the drum part 15 with an air blowing nozzle which is a separate part from the drum part 15, the air diffuser 14 can be manufactured easily and at low cost. In addition, since the air diffusion port 20 for generating bubbles in the used paper raw material liquid 11 supplied into the treatment tank 12 is opened on the outer peripheral surface of the drum portion 15, the used paper fiber Problems such as adhering to the air diffuser 20 and closing the air diffuser 20 can be suppressed.
[0024]
In addition to the diffuser tube 14 as described above, it is naturally possible to use a conventionally used diffuser tube having a large number of air blowing nozzles projecting radially from the outer peripheral surface of the drum portion.
[0025]
FIG. 4 and FIG. 5 show the IV-IV arrow sectional structure and the VV arrow sectional structure in FIG. 1, respectively. That is, the gas-liquid separation tanks 24a, 24b, 24c, and 24d for the respective processing tanks 12 (hereinafter, these may be abbreviated as 24 collectively) on the side of the diffuser tubes 14 located in the respective processing tanks 12. ), A weir plate 25 whose upper end is positioned below the liquid level of the used paper raw material liquid 11 in the processing tank 12 is erected in parallel with the axis of the air diffuser tube 14. That is, the individual processing tanks 12 and the gas-liquid separation tanks 24 are partitioned by these barrier plates 25.
[0026]
The gas-liquid separation tank 24 corresponding to the processing tank 12 positioned on the upstream side in the flow direction of the used paper raw material liquid 11 and the processing tank 12 adjacent on the downstream side in the flow direction of the used paper raw material liquid 11 penetrate the partition wall 13. These are communicated with each other through the formed raw material transfer passages 26. One open end 26o of the raw material transfer passage 26, that is, the raw material discharge port of the present invention is formed at the lower end of the gas-liquid separation tank 24, and the other open end 26i as the raw material introduction port of the present invention is in the processing tank 12. It is formed directly under the air diffuser 14 located in the area. Since the other open end 26i of the raw material transfer passage 26 in the present embodiment located immediately below the diffuser pipe 14 is opened over the entire width of the individual treatment tanks 12 along the axis of the diffuser pipe 14, Bubbles blown out from the air diffusion ports 20 located at both ends in the axial direction of the air diffusion tube 14 in the treatment tank 12 can also be used effectively.
[0027]
In the present embodiment, the other opening end 26i of the raw material transfer passage 26 is positioned directly below the diffuser tube 14, but as long as the used paper raw material liquid 11 is supplied in the vicinity of the diffuser tube 14, the opening position thereof is changed. It is also possible to make it close to the weir plate 25 side.
[0028]
One end of the raw material transfer passage 26 whose other open end 26i is located in the first processing tank 12a is a raw material supply pipe for supplying the used paper raw material liquid 11 obtained in the preceding disaggregation process into the first processing tank 12 27. In addition, one end of the raw material transfer passage 26 where the other open end 26i is located at the lower end of the gas-liquid separation tank 24d corresponding to the fourth processing tank 12d is the treated used paper raw material liquid discharged from the gas-liquid separation tank 24d. 11 is connected to a raw material liquid recovery pipe 28 for taking out 11 and supplying it to the next selective process.
[0029]
In the present embodiment, the depth of the gas-liquid separation tank 24 is set to about ½ of the depth of the processing tank 12, and the used paper raw material liquid 11 in the gas-liquid separation tank 24 is directed directly below the diffuser pipe 14. The gas-liquid separation tank 24 is set to substantially the same depth as the processing tank 12, and the waste paper raw material liquid 11 is scattered from the lower end of the gas-liquid separation tank 24 to the adjacent processing tank 12. It may be made to flow almost directly under the trachea 14.
In order to discharge the bubbles, that is, the froth 30 attached to the ink particles floating on the liquid surface of the used paper raw material liquid 11 to the upper ends of the treatment tank 12 and the gas-liquid separation tank 24, to the outside of the treatment tank 12 and the gas-liquid separation tank 24 Floss troughs 29 are provided, and floss 30 overflowing the floss trough 29 from the liquid surface of the waste paper raw material liquid 11 introduced into the treatment tank 12 and the gas-liquid separation tank 24 is transmitted through the floss trough 29. The drainage pipe 31 discharges the treatment tank 12. An antifoaming agent supply pipe 33 having a nozzle 32 for spraying an antifoaming agent such as water for defoaming the floss 30 downward is disposed immediately above the floss bowl 29. Connected to the device.
[0030]
In the present embodiment, a diffusion plate 34 for uniformly dispersing bubbles is provided on the upper part of the diffuser tube 14 of each treatment tank 12, and the size of the bubbles ejected from the diffuser port 20 is optimized. The distance between the lower end of the diffusion plate 34 and the upper end of the diffuser tube 14 is set to 20 to 250 mm, more preferably about 50 to 150 mm. From such a viewpoint, the diffusion plate 34 may be moved up and down, and it is also effective to arrange a plurality of the diffusion plates 34 spaced apart in the vertical direction.
[0031]
Therefore, the used paper raw material liquid 11 supplied from the raw material supply pipe 27 into the first treatment tank 12 a is agitated with the air blown from the air diffusion port 20 a of the air diffusion pipe 14, and the bubbles rising in the used paper raw material liquid 11 are mixed. The ink particles contained in the waste paper raw material liquid 11 adhere to the surface to become the floss 30, float on the liquid surface of the waste paper raw material liquid 11 and overflow to the froth basin 29, and are discharged from the drain pipe 31 by the floss basin 29. Is done.
[0032]
The used paper raw material liquid 11 from which the ink particles have been removed in the first processing tank 12a flows over the weir plate 25 communicating with the upper part of the first processing tank 12 and flows into the gas-liquid separation tank 24, and the raw material transfer passage 26 To the second treatment tank 12b. In this case, while the used paper raw material liquid 11 flows down in the gas-liquid separation tank 24a, the floss 30 contained in the used paper raw material liquid 11 floats on the liquid surface of the used paper raw material liquid 11 and overflows into the floss bowl 29, Since it is discharged from the drain pipe 31 by the froth trough 29, the amount of the floss 30 contained in the used paper raw material liquid 11 supplied to the second treatment tank 12b becomes very small, and the floss 30 is efficiently removed from the used paper raw material liquid 11. Can be removed. This waste paper deinking process is performed in the same manner in the third and fourth treatment tanks 12c and 12d, and the waste paper raw material liquid 11 from which the ink particles are gradually removed in this manner is finally put into the fourth treatment tank 12d. It flows down the adjacent gas-liquid separation tank 24d, and is taken out from the raw material liquid recovery pipe 28 and recovered.
[0033]
In the above-described embodiment, the four-stage flowator has been described. However, by connecting two or more treatment tanks and gas-liquid separation tanks alternately in series, the whiteness of the recovered waste paper raw material liquid 11 can be increased. Can be improved.
[0034]
【The invention's effect】
According to the first aspect of the present invention, the diffuser tube having a plurality of diffuser ports formed on the outer peripheral surface is disposed through the lower portions of at least two treatment tanks. Since the raw material inlets are opened directly below or close to the lower part, the bubbles ejected from the diffuser of the diffuser tube can be efficiently brought into contact with the waste paper raw material liquid supplied from the raw material inlet into the treatment tank. Is possible. Moreover, since it is only necessary to always provide only one diffusing tube regardless of the number of processing tanks installed, the equipment can be made more compact than the conventional one by reducing the number of parts. Furthermore, since the raw material introduction port is extended along the longitudinal direction of the diffuser pipe and the width dimension thereof is substantially matched with the width dimension of the corresponding treatment tank along the longitudinal direction of the diffuser pipe, the raw material introduction port extends along the longitudinal direction of the diffuser pipe. As a result, the used paper raw material liquid can be reliably and uniformly distributed in the treatment tank, and an efficient deinking process can be performed. Moreover , since it is only necessary to always provide one diffuser tube regardless of the number of treatment tanks installed, the equipment can be made more compact than the conventional one by reducing the number of parts.
[0035]
According to the floatator of the second aspect of the present invention, an air diffuser tube having a plurality of air diffuser ports formed on the outer peripheral surface is disposed through the lower part of at least two treatment tanks, and used paper raw material liquid in the treatment tanks is disposed. arranged gas-liquid separation tank for discharging the waste paper raw material liquid from the bottom end is introduced from the upper end portion adjacent to each processing tank, the raw material in proximity to the right under or just below the diffusing pipe in the treatment tank Since the introduction ports are respectively opened, it is possible to efficiently contact the bubbles ejected from the air diffusion port of the air diffuser with the used paper raw material liquid supplied from the raw material introduction port into the treatment tank. In addition, since the raw material introduction port is extended along the longitudinal direction of the diffuser pipe, and the width dimension thereof is substantially matched with the width dimension of the corresponding treatment tank along the longitudinal direction of the diffuser pipe, Accordingly, the used paper raw material liquid can be surely dispersed and supplied into the treatment tank, and an efficient deinking process can be performed. In addition, the used waste paper raw material liquid and air bubbles can be more reliably separated by the gas-liquid separation tank to realize a good deinking process. Furthermore, since it is only necessary to always provide one diffusing tube regardless of the number of processing tanks, the equipment can be made more compact than the conventional one by reducing the number of parts.
[0036]
The processing tank and the gas-liquid separation tank adjacent to the processing tank are partitioned by a partition plate whose upper end is lower than the liquid level of the used paper raw material liquid in the processing tank, and the processing tank starts from the weir formed at the upper end of the partition plate. When the used waste paper raw material liquid is introduced into the gas-liquid separation tank, the partition plate separates the adjacent processing tank from the gas-liquid separation tank, and the increase in the number of parts can be minimized.
[0038]
When the air diffuser is opened on the outer peripheral surface of the air diffuser and the length of the air diffuser along the axis of the air diffuser is set larger than the width of the air diffuser along the circumference of the air diffuser This eliminates the need for a conventional air blowing nozzle to protrude from the outer peripheral surface of the diffuser tube, and can greatly reduce the manufacturing cost of the diffuser tube. Moreover, it is possible to prevent problems such as clogging due to waste paper fibers being caught in the air diffuser.
[0039]
When the air diffuser is driven and rotated by the rotation driving means, finer bubbles can be ejected from the air diffuser and more efficient deinking processing can be performed.
[0040]
If the opening rate of the air diffuser opening on the outer peripheral surface of the air diffuser is made different for each processing tank, the amount of compressed air supplied to the air diffuser can be minimized, which wastes energy. Can be avoided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a schematic structure of an embodiment of a floatator according to the present invention.
FIG. 2 is a front view showing the appearance of the air diffusing tube in the embodiment shown in FIG.
FIG. 3 is a cross-sectional view of a portion of one air diffuser in the air diffuser shown in FIG. 4;
4 is a cross-sectional view taken along arrow IV-IV in FIG.
FIG. 5 is a cross-sectional view taken along the line VV in FIG.
[Explanation of symbols]
11 Waste paper raw material liquids 12a, 12b, 12c, 12d Treatment tank 13 Partition wall 14 Aeration pipe 15 Drum part 16 Extension part 17 Rotary joint 18 Air inlet 19 Rotating shaft 20, 20a, 20b, 20c, 20d Air diffuser 21 Bearing 22 Shaft coupling 23 Air supply pipes 24a, 24b, 24c, 24d Gas-liquid separation tank 25 Dam plate 26 Raw material transfer passages 26i, 26o Opening end of raw material transfer passage 27 Raw material supply pipe 28 Raw material liquid recovery pipe 29 Floss 樋 30 Floss 31 Drain Liquid pipe 32 Nozzle 33 Antifoam supply pipe 34 Diffusion plate

Claims (6)

Bubbles are blown from the lower part of the treatment tank to which the used paper raw material liquid is supplied, the ink particles intervening in the used paper raw material liquid are adhered to the surface of the bubbles, and the bubbles are allowed to overflow from the upper part of the treatment tank. A flowator for removing the ink particles from the raw material liquid,
At least two treatment tanks;
A diffuser tube which is disposed through the lower part of these treatment tanks and has a plurality of diffuser ports formed on the outer peripheral surface;
Air supply means for supplying compressed air into the air diffuser and ejecting bubbles from the air diffuser;
Each opening in proximity to just below or just below the diffuser tube positioned in the processing bath, a raw material inlet for introducing the waste paper raw material liquid to the treatment tank,
A raw material discharge port for discharging the waste paper raw material liquid in the treatment tank;
A raw material transfer passage connected to the raw material discharge port of one of the processing tanks and the raw material introduction port of the other processing tank and leading the used paper raw material liquid of the one processing liquid tank to the other processing liquid tank; The raw material introduction port extends along the longitudinal direction of the diffuser tube, and the width dimension thereof substantially matches the width dimension of the corresponding processing tank along the longitudinal direction of the diffuser pipe. A featured floatator. Bubbles are blown from the lower part of the treatment tank to which the used paper raw material liquid is supplied, the ink particles intervening in the used paper raw material liquid are adhered to the surface of the bubbles, and the bubbles are allowed to overflow from the upper part of the treatment tank. A flowator for removing the ink particles from the raw material liquid,
At least two treatment tanks;
A diffuser tube which is disposed through the lower part of these treatment tanks and has a plurality of diffuser ports formed on the outer peripheral surface;
Air supply means for supplying compressed air into the air diffuser and ejecting bubbles from the air diffuser;
Each opening in proximity to just below or just below the diffuser tube positioned in the processing bath, a raw material inlet for introducing the waste paper raw material liquid to the treatment tank,
A gas-liquid separation tank arranged adjacent to each of the treatment tanks, for introducing the waste paper raw material liquid in the treatment tank from the upper end portion and discharging the waste paper raw material liquid from the lower end portion;
A raw material transfer passage connecting the lower end of the gas-liquid separation tank adjacent to one of the treatment tanks and the raw material introduction port of the other treatment tank, and the raw material introduction port extends in the longitudinal direction of the diffusion tube A flowtater that extends along a width thereof and substantially matches a width dimension of a corresponding treatment tank along a longitudinal direction of the air diffuser.   The treatment tank and the gas-liquid separation tank adjacent to the treatment tank are partitioned by a partition plate whose upper end is lower than the liquid level of the used paper raw material liquid in the treatment tank, and is formed at the upper end of the partition plate. The flowtater according to claim 2, wherein the waste paper raw material liquid in the treatment tank is introduced into the gas-liquid separation tank from a weir. The air diffuser is opened on the outer peripheral surface of the air diffuser, and the length of the air diffuser along the axis of the air diffuser is longer than the width of the air diffuser along the circumferential direction of the air diffuser. The flow rater according to any one of claims 1 to 3, wherein a large value is also set. The flowtater according to any one of claims 1 to 4 , further comprising a rotation driving means for driving and rotating the air diffuser. The flow rater according to any one of claims 1 to 5 , wherein an opening ratio of an air diffusion port opened on an outer peripheral surface of the air diffusion pipe is different for each processing tank.

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