JP2789526B2 - Papermaking disintegration and dedusting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a new pulp production treatment, a broke treatment or a newspaper,
In waste paper processing of magazines, etc.
Papermaking raw materials including stones, plastic pieces, styrene pieces, and vinyl pieces) are processed, and coarse foreign substances are preferentially discarded to the outside of the system. It also relates to a dust remover.

[Conventional technology]

Conventionally, papermaking equipment such as new pulp production processing, waste paper processing, waste paper processing, etc. disintegrates the disintegrated fragments in the fiber suspension that is the raw material, and removes foreign matter such as stone, sand, metal pieces, resin pieces, etc. In general, rejects of various separators used for removing dust are screened.

However, since the reject contains a large amount of disintegrated fragments together with foreign matter, the screen is measured to collect the disintegrated fibers with a relatively large pore diameter. In addition, there is a problem in that the foreign matter also tends to be insufficient in the separation ability because it also passes through the outlet raw material side. In this case, it is needless to say that the hole diameter of the screen should be made as small as possible in order to prevent foreign matter circulation in the reject processing system and improve the quality and machine operability, but use a screen with a small hole diameter. As a result, the loss of useful fibers is large, and the problem of reduced yield occurs. On the other hand, if a strong deflaker is used in the tail line to prevent the yield from lowering, foreign matter will be crushed, and it will not be possible to remove these foreign matter on the screen, which will adversely affect quality and machine operability. . Especially, in a system using waste paper as a raw material, a large amount of tail is discharged in a system that uses a separator or a round hole screen as a roughing device after pulper, and a complicated system is required to recover useful fibers from this tail. , Causing operation instability.

For this reason, in recent years, in order to collect useful fibers from the tail, a reject processing machine having both a dissociation ability and a dust removal ability has been required.

[Problems to be solved by the invention]

However, as shown in FIG. 5, many of the conventional system processors have an impeller b rotatably provided in the vicinity of a flat disk-shaped screen a. The peripheral speed is different between the outer peripheral side and the outer peripheral side, resulting in a difference in the dust removal effect, which often leads to a deterioration in quality. A large amount of disintegrated fragments are mixed therein, and a large amount of useful fibers are contained in the waste cake, which is discarded out of the system together with the cake and the yield decreases.

In particular, the processing capacity is reduced due to clogging of the screen plate due to the undisintegrated pieces that cannot pass through the screen, and the disintegrated pieces gradually accumulate during the raw material processing time,
There is a drawback that the load on the motor rises and it becomes difficult to continue the operation, so that the raw material processing time is inevitably shortened and the production amount is reduced.

The present invention is intended to accurately eliminate these conventional disadvantages, and generates a turbulent flow with respect to a raw material circulated by an agitator, and applies a shearing force to the raw material by an unraveling action to disintegrate the final fragment. The degree of crushing can be adjusted according to the properties of the raw material and foreign matter, and it is possible to increase the selective processing capacity for separating useful fibers from rejects and foreign matter, and to reduce the amount of disintegrated fragments and reduce the crushing of foreign matter. To improve product quality and simplify the processing system,
It is an object of the present invention to provide an inexpensive device that can greatly increase the recovery of useful fibers.

[Means for solving the problem]

The present invention provides a raw material supply port and a disk-shaped flat screen for separating a raw material into a useful fiber component and an impurity foreign material component in a closed casing having a foreign material discharge port, and a fiber collection chamber. The impeller is rotatably provided in proximity to the flat screen on the side of the foreign matter collection chamber, and a cylindrical screen basket is annularly formed on the outer peripheral surface of the outer end of the impeller that moves. A disintegrating and dust removing machine for papermaking, characterized in that it is provided oppositely to the outer periphery of a flat screen, a selection chamber is defined on the outer periphery of the screen basket, and an agitator is turned along the screen basket. It is.

(Operation)

In the paper disintegrating and dust removing machine of the present invention, the high-quality fibers in the raw material fed into the casing 3 from the raw material supply port 1 are swirled by the impeller 7 and the agitator 8, and are provided close to the rotating agitator 8. It passes through the screen plate of the shaped screen basket 9, passes through the selection chamber 10, and is sent to the next step in the channel 12. The disintegrated fibers that cannot pass through the screen plate of the basket 9 are in the shock wave of the impeller 7 rotating on the flat plate screen 4 and the frictional action between the impeller 7 and the screen 4 and in the screen 4 in the foreign matter collection chamber 6. Relatively large holes (5-
(30 mmφ), it is disintegrated by the impact with the impeller, returned to the raw material supply port 1 by the pipe 15 through the fiber recovery chamber 5, sent to the screen plate of the cylindrical screen basket 9 again, and passed the high quality fiber. . End defibration piece by repeating this action becomes less and less, foreign matter in the raw material may be eliminated foreign matter open valve V ₄ of the discharge passage 14 at an appropriate since come accumulated in the casing 3. In any case, the raw material is turbulently circulated in the foreign substance collection chamber 6, flows through the useful fibers from the screen 4 and the screen basket 9, and is separated without passing through both screen plates. Is removed from the system and processed.

On the other hand, the screen 4 was sent in by arranging a selection chamber 10 opposite to the moving surface of the agitator 8 which rotates together with the impeller 7 which rotates by rotating the impeller 7 by wiping the screen surface so as to wipe it. In addition to the turning and vortex of the raw material, turbulent flow is generated in the agitator 8 to disintegrate the raw material, and undisintegrated pieces that cannot pass through the screen 4 are rejected by centrifugal force by the impeller 7 and loosened by the agitator 8. The useful fibers are removed from the screen basket 9 by the centrifugal force while being disintegrated.
The coarse foreign substances in the raw material are blown to the outer peripheral wall of the foreign substance recovery chamber 6 and fall and gather at the lower discharge port 2 while turning the peripheral wall, and the valve V ₄ of the outlet flow path 14 is intermittently opened and closed. The useful fibers that have been removed and passed through one screen 4 are circulated through a useful fiber recovery chamber 5 through a circulation pipe 11 to a channel 12, and the useful fibers that have entered the selection chamber 10 are opened and closed by a valve V _{2 in} a channel 13. It is taken out of the casing system by control and processed as a raw material in the next step.

That is, the undisintegrated pieces in the raw material are less likely to be disintegrated and remain, and the foreign matter cannot gradually pass through the screen, and is gradually concentrated in the casing, so that the passage of high-quality raw material to the outlet is hindered. When the pressure difference reaches a preset state, the inlet valve is closed, washing water is introduced into the casing, and the high-quality fibers remaining in the casing are collected at the outlet side. After this high-quality fiber is recovered, only water and foreign substances are contained in the casing, and foreign substances are discharged out of the system by fully opening the reject valve.All these operations are automatically controlled, and unmanned operation is performed. In any case, during the process of passing the raw material through the closed casing 3, the timer or the load or the detection of the pressure difference between the inlet and the outlet of the raw material, whichever is first activated, is prioritized, and the process is shifted to the disintegration process of the residual powder. The useful fiber collection / washing step and the foreign matter discharge step are sequentially performed, and each step is continuously operated for a predetermined time by a timer to improve the disaggregation effect, enhance the foreign matter separating function, and also has a small pump capacity for supplying the raw material. And the running cost can be significantly reduced.

〔Example〕

The embodiment of the present invention will be described with reference to FIGS. 1 to 3 by way of example. On one inner surface of a closed casing 3 provided with a raw material supply port 1 above and a foreign matter discharge port 2 below, the raw material contains useful fiber components. A screen 4, for example, a disk-shaped flat screen plate, is provided for separating impurities into foreign matter, and is divided into a fiber collection chamber 5 and a foreign matter collection chamber 6, and the screen 4 on the foreign matter collection chamber 6 side is formed. An impeller 7 is provided rotatably in proximity to the impeller 7, and an agitator 8 is provided on an outer end surface of the impeller 7 in order to increase a relative speed difference from a material circulation speed generated by the impeller 7. A selective screen room 10 is defined by disposing a cylindrical screen basket 9 in a ring shape, and a disintegrator having a flow path 12 serving as a selected material outflow path in this room.

As the agitator 8, the airfoil piece is directly provided in a state of extending in a direction perpendicular to the outer end surface of the impeller 7,
In some cases, it may be provided on the rotating shaft 17 of the impeller 7 via an arm (not shown). In addition, a cylindrical screen basket 9 is provided close to the outer periphery of the screen 4 of a disk-shaped flat screen plate, and the loosened pieces are effectively released by generating turbulence in relation to the impeller 7 and the agitator 8. It is possible to do. Both screen plates are used by selecting a round hole plate or a slit plate. The size of the holes or slits is not limited to the same size, but may be selected to be different sizes to improve the dust removal effect and the useful fiber recovery rate. .

The useful fiber collection chamber 5 is provided with a circulation pipe 15 in communication with the raw material supply flow path 11, and an impeller 16 for generating a circulation flow in the chamber is rotatably provided with an on-off valve in the pipe 15.
Is possible to control the passage mechanism flat screen plate and the adjustment of V _5, those capable of performing efficiently resulting maceration action.

In particular, an impeller 16 for generating a pumping action is attached to return the raw material on the exit side of the flat screen plate of the screen 4 to the raw material supply port 1 side, so that the circulating amount of the raw material is increased as much as possible to promote the disaggregation of the fragment. Is preferred.

Further, the raw material supply port 1, the discharge channel the feed channel 11 with a control valve V _1, also the foreign matter discharge port 2 with a control valve V ₄
14 is connected, further in conjunction with the selective material outlet and outlet channel 12 with a control valve V ₂ are connected to the raw material flow path 11 or closed casing 3, the cleaning water feed stream with a control valve V ₃ Road
13 and, if necessary, an exhaust passage with an air vent valve (not shown)
And are deployed.

Further, the screen 4 provided in the closed casing 3 uses a round hole strainer or a slit screen to generate a swirling flow in the raw material by the impeller 7 and the agitator 8, so that the supply of the raw material and the washing water and the foreign matter and the selection are performed. each operation of the discharge of the raw material and performs the opening and closing of the control valve V ₁ ~V ₅ deployed in each channel 11, 12, 13, the wash water supply provided in the closed casing 3 including control valve V _3, the control valves V ₁ ~V ₅ repeats the opening and closing operation, a reject process is performed.

That is, a water filling step, a raw material processing step, a defibration step, a cleaning step, and a foreign matter discharging step are performed. For example, over too accumulate foreign matter into the casing 3 loaded, closing the control valve V ₁ of the raw material flow path 11 since the degradation, open the control valve V ₃ of the cleaning water supply channel 13, the casing 3 washing After collecting the quality fibers and, by closing the control valve V ₂ of the outlet channel 12, also Hai棄foreign matter out of the system by opening the control valve V ₄ of the discharge passage 14. Then again the control valve V ₄ is opened the control valve V ₃ of the cleaning water supply channel 13 in a closed casing 3 tension of water, the control valve of the raw material flow path 11
Open the control valve V ₂ of V ₁ and outlet channel 12 is intended to pass a raw material containing high-quality fibers.

In addition, at the time of foreign matter discharge, when the load of the timer or the motor, or the differential pressure at the entrance and exit is in a preset state, the inlet valve is closed, and the washing water is introduced into the closed casing 3,
The good-quality fibers remaining in the closed casing 3 are collected at the outlet side. After the high quality fibers are collected, the closed casing 3
Inner to Hai棄foreign matter out of the system by fully opening the valve V ₄ for discharge becomes only water and foreign objects. All of these actions are controlled automatically and care is taken to ensure unmanned operation.

Further, as shown in FIG. 4 example, the form of continuously discharged by opening the valve V ₅ for a small amount from the discharge port 18 provided at the center of the casing 3 the foreign matter discharge accumulated in the casing 3 irrespective of the batch It can also be.

The impeller 7 is configured to be driven while being controlled by a motor via a rotating shaft 17,
May be a form via the transmission or speed increasing mechanism to the clutch mechanism, and each control valve V ₁ ~V ₅ and each detector, the timer is communicated to the computer unit of the data processing unit (not shown), a control circuit A / D converter and D / A converter for inputting data of disaggregation conditions such as raw material throughput, raw material type, raw material concentration, inlet / outlet pressure difference, load, etc. as an analog signal and converting it into a digital signal. compared processes the input data and the internal fixed data in the computer unit controls the motor for driving the rotating impeller 7, and while the digital display to continuously display unit controls the opening and closing of the control valve V ₁ ~V ₅ It is good to drive.

〔The invention's effect〕

The present invention provides a screen for separating a raw material into a useful fiber component and a foreign material component of impurities in a closed casing provided with a raw material supply port and a foreign material discharge port to provide a fiber collection chamber and a foreign substance collection chamber. A partition is formed, and an impeller is rotatably provided in proximity to the screen on the foreign matter collection chamber side, and a smooth screen basket is annularly provided on an outer peripheral opposing surface of an outer end of the impeller that moves, and is disposed. A fine selection chamber is defined around the outer periphery of the screen basket, and an agitator is provided that rotates along the screen basket. That is, the screen of a flat plate and a cylindrical plate and an impeller and an agitator are provided on each of the screens to remove dust. Can be performed efficiently without unbalance, and the shearing force is applied to the raw material to efficiently disintegrate Even if a large amount of disintegrated fragments are mixed, the disintegration effect is not insufficient, the recovery yield of useful fibers can be improved, the clogging of the screen plate is small, the processing capacity is good, and the raw material processing time is prolonged, and the production volume is increased. The quality of the product can be improved by controlling the degree of crushing of the foreign material without breaking the foreign material and improving the product quality. It is a device with high selective processing power to separate foreign substances, and it can be operated safely without overload phenomenon, and the operation and operation time of the disintegration function is adjusted according to the amount and nature of the disintegrated fragments in the raw material Efficient work can be performed without undisintegrated fragments being discharged out of the system together with the lees and deteriorating the yield.

[Brief description of the drawings]

FIG. 1 is a side view of a part of an embodiment of the present invention, FIG.
The figure is a partial enlarged front view, FIG. 3 is a perspective view of the impeller,
FIG. 4 is a side view in which a part of another embodiment is cut, and FIG. 5 is a front view of a conventional example when a lid is opened. DESCRIPTION OF SYMBOLS 1 ... Material supply port, 2 ... Foreign matter discharge port, 3 ... Sealed casing, 3 ₁ ... Lid, 4 ... Screen, 5 ... Fiber recovery chamber, 6 ... Foreign matter recovery chamber, 7 ... Impeller , 8 ... agitator, 9 ... cylindrical screen basket, 10 ... selection room, 11,12,13,14,15 ... flow path, 16 ... impeller, 17 ...
... axis of rotation, 18 ...... outlet, V ₁ ~V ₅ ...... valve.

Claims (2)

(57) [Claims] 1. A fiber collecting chamber provided with a disk-shaped flat screen for separating a raw material into a useful fiber component and an impurity foreign material in a closed casing having a raw material supply port and a foreign substance discharge port. And a foreign matter collection chamber, and an impeller is rotatably provided in proximity to the flat screen on the foreign matter collection chamber side, and a cylindrical screen basket is annularly formed on the outer peripheral facing surface of the outer end of the impeller that moves. A disintegrating and dust removing device for papermaking, characterized in that it is provided close to the outer periphery of the flat screen and arranged so as to define a selection chamber on the outer periphery of the screen basket, and the agitator turns along the screen basket. Machine. 2. The papermaking disintegration apparatus according to claim 1, wherein the fiber collection chamber is provided in communication with a raw material supply flow path by a circulation pipe, and an impeller for generating a circulation flow is rotatably provided in the chamber. Dust remover.