JP2762369B2 - Operating method of pulper for papermaking - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention disintegrates raw materials at a high concentration as papermaking equipment such as waste paper processing of used newspapers and colored papers, and uses them as deinking raw materials or various other raw materials. The present invention relates to a high-concentration pulper operating system for use, that is, a method for operating a papermaking pulper.

[Conventional technology]

Conventionally, most of this kind of high concentration pulper (10-20%
Concentration) was a batch operation. That is, when the raw material disintegration is completed, the discharge mechanism is opened to discharge the entire raw material together with the foreign matter from the pulper, dilute it with a chest to about 5%, collect the organic fibers, fill the pulper again with water, and feed the raw material. Although the disintegration was performed, the process was repeated. In addition, a method has been attempted in which the discharge mechanism is opened and the raw material is discharged through a dust remover equipped with a strainer after the completion of the raw material disaggregation. In this method, the pulper is provided with a strainer for each batch in the batch-type movement. The lower valve of the dust remover tab was opened and discharged, but there was no change to the batch operation and the operability was not good. On the other hand, for continuous operation, a dissociation rotor that circulates the stock is rotatably provided at the bottom of the tank, and a processing material chamber is partitioned around a perforated wall such as a strainer around the periphery thereof. It is known that a method of continuously extracting a raw material while introducing dilution water into a chamber and diluting to a concentration of about 5% is used, but even in this case, foreign substances in the raw material may pass through the strainer. I ca n’t,
Foreign matter gradually accumulates in the pulper, and the foreign matter crushed by the rotation of the rotor is sent to the next step, which may cause problems in post-processing.In addition, the quality may not be improved while crushing the foreign matter and wasteful power consumption. Are known.

[Problems to be solved by the invention]

In the conventional treatment with a pulper, the batch type operation has a loss of operation time, and the operability and yield are poor, the pulper type becomes large, the equipment motor becomes large, and the number of times of starting and stopping the motor is increased. However, there is a disadvantage that the motor becomes a special type and becomes expensive. For this reason, even in continuous operation, foreign substances in the raw material gradually accumulate in the pulper, and as the time elapses, the concentration of the foreign substance in the pulper increases, and the concentration of the raw material withdrawn decreases in proportion to the time. In addition to the above, there is a problem that power is consumed and power management is unfavorable in terms of operation management and cost.

The present invention is intended to properly eliminate these conventional drawbacks, and can effectively treat the pulper, continuously collect useful fibers of good quality fibers in the pulper extremely efficiently and continuously, and improve the processing capacity. It is possible to improve the operability of the pulper, improve the operability of the pulper. Accordingly, it is an object of the present invention to provide a method for operating a papermaking pulper in which pulper cleaning is reduced or unnecessary, maintenance security is ensured, a safe and reasonable operation is possible, and reliability is greatly improved.

[Means for solving the problem]

The present invention relates to a stock material to which a raw material for papermaking is supplied, wherein the raw material is stirred and circulated by a rotatable dissociation rotor together with a liquid to dissociate the raw material in the liquid, and the dissociated high-quality fibers in the tank. In the method of operating a papermaking pulper that leads out of the system while adjusting the discharge amount of the foreign matter containing the undisintegrated component, the quality fiber is discharged together with the foreign material containing the undisintegrated component by the discharge mechanism in the discharge path. Is discharged once to the storage and disintegration tank while being adjusted, and in the storage and disintegration tank, the high-quality fibers are separated into undisintegrated components-containing foreign matter, and the high-quality fibers are continuously derived from the storage and disintegration tank, and The undisintegrated material remaining after the foreign matter has been removed in the storage and disintegration tank is intermittently discharged to the dust removing tank, and the foreign matter in the undisintegrated matter is further separated and removed while introducing dilution water into the dust removing tank. This foreign matter was separated All or part of the macerating min while reprocessed returned circulated to the stock tank, a papermaking pulper operating method characterized by discharging the foreign substances stored intermittently from dust tank.

(Operation)

In the method for operating the papermaking pulper of the present invention, the whole of the stock mixed and stirred by the disintegration rotor in the pulper is continuously introduced into the storage and disintegration tank for continuous operation to separate useful fibers from foreign matter. The foreign matter containing the undisintegrated components to be continuously collected and stored is transferred to a dust removal tank that is operated intermittently and separated into the undisintegrated components and the foreign materials. It is returned to the pulper and circulated for reprocessing.
Foreign matter is intermittently removed from the dust removal tank, and high-quality fibers are continuously collected and provided to the next process for operation with greatly improved operability. The crushing of foreign matter is extremely small, and it is possible to operate satisfactorily both in quality improvement and operation management.

〔Example〕

The embodiment of the present invention will be described with reference to FIGS.
The raw material A is stirred in the stock material tank 1 supplied with the conveyor B while being circulated by the rotatable rotatable rotor 2 together with the liquid to disintegrate the raw material A into the liquid. and fibers, method of operating a papermaking pulper to derive the outside the system while adjusting the emissions and foreign substances including non defibration content by the discharge amount adjusting mechanism 4, for example a valve V ₁ of the discharge passage 3, good fiber Not macerating The storage and disaggregation tank 5 is controlled by the discharge amount adjusting mechanism 4 of the discharge path 3 together with the foreign matter containing
Once, the diluted water is supplied from the water supply channel 11, and the high-quality fibers are separated from the non-disintegrated portion-containing foreign matter in the storage and disintegration tank 5, and the high-quality fibers are discharged from the storage and disintegration tank 5 with the pump 6. The undisintegrated portion which is continuously led out to the chest C by the passage 7 and which has been removed after the foreign matter has been removed in the storage and disintegration tank 5 is transferred to the dust removing tank 8 via the communication passage 9 by the valve V ₂ of the discharge unit 10. It opened and closed intermittently discharged at this dilution to dust removal tank 8 water supply passage 11 ₁ is introduced from further separating and removing foreign matters MiHanare in solution fraction with a total non defibration component separated in the foreign substance Alternatively, a part of the stock tank 1 is returned to the return path 13 having a pump 12.
And re-processed by introducing it into the chest C, and intermittently open the valve V ₃ of the discharge section 15 in the foreign substance discharge path 14 from the dust removing tank 8 to remove the stored foreign substances from the system. It can be discarded.

In this case, the raw materials are stored in the storage / disintegration tank 5 and the dust removal tank 8 by rotating impellers 16 and 17 respectively.
While being circulated and stirred, foreign substances are intermittently discharged and removed from the system by the final treatment means while the pulper operation is performed, while separating into the derived part and the reserved part by the screens 18 and 19 having slits or round holes for liquid passage. Is good.

In the drawing, M ₁ , M ₂ , and M ₃ are driving motors provided to rotationally drive the disintegration rotor 2 and the impellers 16 and 17, respectively. V ₁ ~V ₇ governs the opening and closing of the flow paths in the valve such as an electromagnetic valve. Although V ₈ ~V ₉ are respectively provided in the return passage 13 and branch passage 13 ₁ in manual valve, it is possible to switch distributed three-way valve provided in the branch point. Reference numeral 20 denotes a water supply source, and reference numeral 21 denotes a deaeration pipe provided in the dust removing tank 8.

Thus, if it the raw material A was charged to the stock tank 1 of water was placed in a predetermined amount so the system shown in Figure 3 starts operation as ON the motor M ₁ of the defibration rotor 2, in water supply passage 11 When the valve V ₇ opened by opening the valve V ₆ of degassing tubes 21 simultaneously, and the valve V ₅ of the water supply passage 11 ₁ opens. Storage / separation tank 5
And water is supplied into the dust tank 8, respectively, and ON the motor M ₂ of the impeller 16 in the reservoir defibration tank 5 at a predetermined time has elapsed after the timer. Next, after a predetermined time, the discharge section 4 of the discharge path 3
Continuously continuously supplied to the chest C withdrawn through the outlet channel 7 from the tank 5 a useful fiber content as ON the pump 6 with opening the valve V ₁ continues to transfer to the storage defibration tank 5. At this time, the motor of the impeller 17 of the dust tank 8 reaches the load limit of the motor M ₂ of the timer or the impeller 16
Upon the M ₃ and ON, opening the valve V ₂ of the discharge portion 10 of the communication passage 9 is also started valve V ₄ of the return passage 13 from the open back of the non-defibration content in the paper stock tank 1, water supply path 11 ₁ valve V ₅
The pump 12 as ON is opened, closing the valve V ₂ after a predetermined time has elapsed, the pump 12 After an additional predetermined time OF
And F, after performing the foreign matter discharge valve V _5, V ₄ closed, by opening the valve V ₃ of the discharge passage 14 from the valve V ₆ is opened, the valve
Turning OFF the motor M ₃ of the closed impeller 17 V _3. And the valve V ₆ and valve V ₅ is opened, introducing the diluting water from the water supply path 11 _1, closing the valves V ₅ and V ₆ after the full level, the impeller
The motor M ₃ 17 and ON provided next dedusting step, in which the derivation of continuous quality repeat the processing steps may be carried out to the outflow path 7.

4, the operation of the stock tank 1 is the same as that of the embodiment shown in FIG. 3, and the impeller 16 of the storage / disintegration tank 5 is used.
After the motor M ₂ and ON, the valve V ₄ Bleed first by opening the valve V ₆ of degassing tubes 21, closed a predetermined time has elapsed after the valve V ₂ opens the valve V ₂ in the order, further valves V ₅ by opening the oN the pump 12 of the return path 13 while supplying dilution water, the valve V ₄ stop the water supply by closing the valve V ₅ after a predetermined operation
OFF the pump 12 closed, OFF the motor M ₃ of the impeller 17 to close the valve V ₃ from the exclusion of foreign material by opening the valve V ₃ of the discharge portion 15 of the degassed valve V ₆ is opened discharging path 14 By waiting until the next foreign matter removing step, the above-described disaggregation processing step can be repeated in each part, and the good-quality fibers can be continuously and efficiently discharged through the outflow path 7.

〔The invention's effect〕

The present invention is a high-quality fiber together with foreign matter containing undisintegrated components,
The discharge amount is adjusted by the discharge mechanism of the discharge path, and once discharged to the storage / disintegration tank, the high-quality fiber and the non-disintegrated portion-containing foreign matter are separated in the storage / disintegration tank, and the high-quality fiber is stored and disintegrated. , And the remaining undisintegrated material remaining after removal of foreign matter for the storage and disintegration tank is discharged intermittently to the dust removal tank, and diluted water is introduced into the dust removal tank while diluting water is introduced. The foreign material is further separated and removed, and all or a part of the separated undisintegrated material is returned to the stock tank, circulated and reprocessed, and the stored foreign material is intermittently discharged from the dust removing tank. By doing so, the pulper treatment can be effectively performed, useful fibers of good quality fibers in the pulper can be continuously collected extremely efficiently, and the processing capacity can be increased to improve the operability of the pulper. Good without crushing Post-treatment including foreign matter treatment that should be eliminated without reduction is also easy, preventing foreign matter from gradually accumulating in the pulper, reducing or eliminating the need for pulper cleaning. Operation is possible and the reliability is greatly improved, and the pulper is downsized, the installation area is small, the power is small, and the equipment cost can be reduced.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is a side view for explaining a system, FIG. 2 is a sectional plan view taken along the line II in FIG.
The figure shows a flow sheet in an operating state, and FIG. 4 shows a flow sheet in an operating state of another embodiment. 1 ... stock tank, 2 ... rotor, 3 ... stock discharge path,
4 ... discharge adjustment mechanism, 5 ... storage and disintegration tank, 6 ...
... Pump, 7 ... Outflow path, 8 ... Dust removal tank, 9 ...
Communication passage, 10 discharge section, 11, 11 ₁ ... water supply path, 14 foreign matter discharge path, 15 discharge section, 16, 17 impeller, 18, 19 ...
Screen, M ₁ ~M ₃ ...... motor, V ₁ ~V ₉ ...... valve.

Claims (3)

(57) [Claims] A raw material is supplied in a stock tank to which papermaking raw material is supplied. The raw material is stirred with the liquid while being circulated by a rotatable disintegrating rotor to disintegrate the raw material in the liquid. In the method of operating a papermaking pulper in which fibers and foreign matter containing undisintegrated components are led out of the system while adjusting the discharge amount, good quality fibers are discharged together with foreign matter containing undisintegrated components by a discharge mechanism in a discharge path. Once discharged to the storage and disintegration tank while the amount is adjusted, high-quality fibers in the storage and disintegration tank, and separated into undisintegrated components-containing foreign matter, continuously deriving good quality fibers from the storage and disintegration tank, The undisintegrated material remaining after the foreign matter has been removed from the storage and disintegration tank is intermittently discharged to the dust removing tank, and diluting water is introduced into the dust removing tank to further separate and remove the foreign matter in the undisintegrated matter. , This foreign matter is separated All or part of the non-defibration min while reprocessed returned circulated to the stock tank, papermaking pulper operating method characterized by discharging the foreign substances stored intermittently from dust tank. 2. The raw material is separated and separated in a storage and disintegration tank and a dust removal tank by a rotating impeller while being circulated and stirred by a screen having a slit or a round hole for liquid passage. 2. The method according to claim 1, further comprising the step of intermittently discharging and removing foreign matter from the system in the final processing step.
Operating method of the described pulper. 3. The open / close valve, wherein the discharge mechanism of the discharge path of the stock tank is an open / close valve that is operated and controlled after a predetermined time of operation of a rotating disintegration rotor or by a predetermined power load of the disintegration rotor. 3. The method for operating a pulper according to claim 1, wherein the paper material is discharged to a dust removing tank.