JPH02259182A - Reject-treatment apparatus for paper-making - Google Patents

Abstract

PURPOSE:To apply shearing force to a circulating raw material with mixing action caused by turbulent flow by placing an impeller to a foreign material recovery chamber separated from a valuable fiber-recovery chamber with a screen and attaching a maceration edge to the impeller and a stationary maceration edge to a casing. CONSTITUTION:A liquid raw material supplied to a closed casing 3 through a raw material feeding port 1 is passed through a gap between a maceration edge 8 and a stationary maceration edge 9 and introduced into an impeller chamber 17. Non-macerated fibers in the raw material are macerated by the rotation of the edges 8, 9 and the impeller 7 and good fibers are passed through a screen 4 and delivered from a choice raw material outlet port 15. The foreign materials and non-macerated fiber pieces unable to be passed through the screen 4 are returned to the raw material flow channel 21 via an introduction channel 24 by the action of the impeller 7.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is applicable to the production of new pulp, the treatment of waste paper, or the treatment of waste paper such as newspapers and magazines. Styrofoam piece.

This invention relates to a reject processing device that processes raw materials for paper manufacturing including (vinyl pieces), prioritizes coarse foreign matter and discards them out of the system, and disintegrates undisintegrated pieces.

[Conventional technology]

Conventionally, in paper manufacturing equipment such as new pulp production processing, waste paper processing, and waste paper processing, undisintegrated pieces in the raw material fiber suspension are disintegrated, and foreign substances such as stones, sand, metal pieces, resin pieces, etc. The tails of various separators used for waste removal are generally treated with screens.

However, since this tail contains a large amount of undisintegrated fibers as well as foreign matter, the screen has a relatively large pore diameter in order to recover the undisintegrated fibers.

However, when the screen has a large pore diameter, foreign matter inevitably passes through to the outlet raw material side, which tends to result in insufficient separation ability, which is a problem. In this case, in order to prevent the circulation of foreign matter in the reject processing system and improve quality and machine operability, the pore diameter of the screen should be as small as possible (it goes without saying that it is necessary to use a screen with a small pore diameter). As a result, the loss of useful fibers is large and the problem of lower yield occurs.On the other hand, if a strong deflation force is applied to the tail line to prevent lower yield, foreign matter will be crushed, and the screen will remove these particles. It becomes impossible to remove the foreign matter, which ultimately has a negative effect on quality and machine operability.

In particular, in systems that use waste paper as a raw material and use separators or round-hole screens as coarse selection equipment after pulping, a large amount of tail is discharged, and a complex system is required to recover useful fibers from this tail. This caused operational instability.

For this reason, recently, there has been a need for a reject processing machine that has both disintegration ability and dust removal ability in order to recover useful fibers from the tail.

[Problem to be solved by the invention]

However, in the case of materials that are relatively difficult to disintegrate, such as corrugated waste paper raw materials, this conventional paste injection processing machine lacks disintegration ability, and the tail contains many undisintegrated pieces, resulting in waste waste being discarded. This contains a large amount of useful fibers, which are thrown out of the system along with the lees, resulting in a decrease in yield.

In particular, undisaggregated fragments that cannot pass through the screen clog the holes in the screen plate, reducing processing capacity.In addition, undisaggregated fragments gradually accumulate during raw material processing time, increasing the load on the motor and making it difficult to continue operation. However, this inevitably shortens the raw material processing time, resulting in a decrease in production.

The present invention aims to accurately eliminate these conventional drawbacks, and aims to promote disintegration of undisintegrated pieces by applying shearing force to the raw materials through turbulent mixing of the raw materials being circulated by the main impeller. The degree of crushing can be adjusted depending on the raw material properties and foreign matter properties, increasing the selection processing capacity to separate useful reject fibers from foreign matter, and reducing the amount of undisintegrated fragments and crushing of foreign matter, thereby improving product quality. The purpose of the present invention is to provide an inexpensive device that is useful for improving the quality of fibers, the processing system can be simplified, and the recovery of useful fibers can be greatly increased.

[Means for Solving the Problem] The present invention provides a sealing casing having a material supply port and a foreign matter discharge port, on one inner surface of which is provided with a material for separating the raw material into a useful fiber component and an impurity foreign material component. A screen is provided to divide the chamber into a useful fiber recovery chamber and a foreign matter recovery chamber, an impeller is rotatably provided adjacent to the screen on the side of the foreign matter recovery chamber, and disintegration blades are provided around the base of the impeller. This paper manufacturing reject processing apparatus is characterized in that a fixed defibration blade part is provided in the casing opposite to the defibration blade part.

[For production]

To explain the embodiment of the jabolo type of the present invention, the sealed casing 3, 3. The raw material supplied from the raw material supply port 1 passes between the defibrating blade part 8 and the defibrating fixed blade part 9, and is sent into the impeller chamber 17 where the impeller 7 is located. The undisintegrated fibers in the raw material are disintegrated by the turbulence and impact caused by the rotation of the gear-shaped disintegrating blades 8 and 9 and the impeller 7, and
The high-quality fiber passes through the screen 4, passes through the useful fiber recovery chamber 5, and is led out from the selected raw material outlet 15 to the control valve 25 of the channel 25.

It is taken out by opening/closing control and processed in the next process.

On the other hand, foreign matter that cannot pass through the screen 4 and remaining undisintegrated fiber pieces are blown to the outer periphery of the impeller chamber 17 by the impeller 7 and returned to the raw material flow channel 21 via the outlet flow path 24, where foreign matter is recovered from the raw material supply port 1. Return to room 6. That is,
Foreign matter in the raw material cannot pass through the screen and gradually becomes concentrated inside the casing, blocking the passage of good quality raw material to the outlet, and when the load on the timer or motor or the differential pressure at the inlet and outlet reaches a preset state, the large mouth valve is closed and wash water is introduced into the casing to collect the quality fibers remaining in the casing to the outlet side. After the high-quality fibers are collected, the inside of the casing becomes only water and foreign matter, and by fully opening the control valve V2 of the reject valve, the foreign matter is discharged to the outside of the yarn. All these operations are automatically controlled and operated unmanned, but in any case, during the operation process of passing the raw material to the sealed casing 3, a timer or a load or a pressure difference between the inlet and outlet of the raw material, whichever comes first. Priority is given to activated detection, and the remaining undisaggregated pieces are moved to the disintegration process, and the useful fiber recovery/washing process and the foreign matter discharge process are sequentially performed, and each process is continuously operated for a predetermined amount of time using a timer to ensure a good disintegration effect. In addition to improving the ability to separate foreign substances and useful fibers, the device can also be made with a small pump capacity for supplying raw materials, which can significantly reduce running costs.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 1 to 5. The raw material is stored as a useful fiber component on one inner surface of a sealed casing 3, which has a raw material supply port 1 on the upper side and a foreign matter discharge port 2 on the lower side. A screen 4 for separating impurities from foreign matter is provided to form a useful fiber recovery chamber 5 and a foreign matter recovery chamber 6, and an impeller 7 is rotatable near the screen 4 on the foreign matter recovery chamber 6 side. In addition, a defibrating blade part 8 is provided around the impeller 7, and a defibrating fixed blade part 9 is provided opposite to the defibrating blade part 8.
is arranged in the casing 3 to serve as a paper manufacturing reject processing device.

In this case, the defibration blade part 8 is provided on a cone-shaped member 18 having a plurality of gear-shaped blade parts arranged in a ring shape as external teeth in a plurality of stages in the axial direction of the impeller 7. A movable multi-stage blade part is protruded from the central part of the blade, and the fixed blade member for disaggregation is a tapered hole 10 with gear-shaped blade parts 9 arranged around the periphery and a plurality of internal teeth provided in multiple stages. The tapered hole 1 is
It is preferable that the multi-stage disaggregating blade part 8 provided on the impeller 7 be disposed facing the multi-stage disaggregating blade part 8 with a gap therebetween, and can be detachably attached to the partition wall 12 that partitions the foreign matter collection chamber 6 via a gap adjustment shim 13. Moreover, this is a reject processing apparatus in which a selected raw material outlet 15 is formed in the useful fiber recovery chamber 5.

In addition, inside the casing 3, a partition wall 12 provided with a fixed blade section 9 for disintegration, which is disposed opposite to the disintegration blade section 8 provided on the impeller 7 with a gap, separates the foreign matter recovery chamber 6 and the impeller chamber 17.
The impeller chamber 17 and the foreign matter recovery chamber 6 are communicated with each other through a circulation passage 24, and the disk 11 with the fixing force 9 for disaggregation is connected to a stay (not shown) provided in the casing 3. )
In the case of the partition wall 12, it is preferable that the partition wall 12 is a partition plate that partitions the vertical surface of the casing 3 and is installed opposite to the impeller 7.
It is preferable to form an attachment hole 27 into which the holder 1 is removably inserted. Further, the raw material supply port 1 is connected to a raw material flow path 21 having a control valve V of an 0N-OFF valve, and the foreign matter discharge port 2 is connected to a discharge flow path 22 having a control valve 2. The outlet 15 is connected to a discharge passage 25 having a control valve V5, and the raw material passage 21 or the sealed casing 3 is connected to a cleaning water supply passage 23 having a control valve V3 and an air bleed valve (6). An exhaust flow path 26 is provided, and a circulation flow path 24 having a manual valve V4 for causing circulation from the impeller chamber 17 to the foreign matter collection chamber 6 is provided.

In addition, the screen 4 installed in the sealed casing 3 uses a round hole strainer or a slit screen,
The impeller 7 generates a swirling flow in the raw material, and the control valves installed in each flow path 21, 22, 23, 24, and 25 control the operations of supplying the raw material and washing water, and discharging foreign matter and selected raw materials. , ~■5. Each control valve V, -V6, including the air bleed valve V6 provided in the hermetic casing 3, is repeatedly opened and closed as shown in Table 1, and the reject process is performed.

For example, in the case of lightweight ejection treatment of various separators shown in FIG.
When the screen tail is supplied via the screen separator 33 to the sealed casing 3 for reject processing in the raw material flow path 21, the process is performed according to the steps shown in FIG. 5, but the control system shown in Table 1 is used.

Table 1 And, in the raw material processing process, timer T, load up differential pressure Δ
Whichever p is activated first is given priority and the process proceeds to the disintegration step.

That is, after filling the screen with water, the raw material processing process is entered in a raw material passing operation, and the useful fibers are led out from the flow path 25 using an m gun, but the detection is activated either by the timer, the load, or the pressure difference between the inlet and outlet of the raw material, whichever comes first. Priority is given to the disintegration process of the remaining undisaggregated pieces, followed by the selective raw material recovery/washing process of useful fibers and the foreign matter discharge process, and each process is performed for a predetermined time by a timer.
Continue driving.

For example, foreign matter in the raw material cannot pass through the screen 4 and is gradually concentrated inside the closed casing 3, which prevents the good quality raw material from passing to the outlet. timer T or motor load Hp,
Alternatively, when the differential pressure Δp at the inlet and outlet reaches a preset state, the inlet valve ■ and the outlet valve V are closed, the undisintegrated fibers accumulated in the casing are disintegrated, and then the outlet valve V is closed again.
, is opened, and the washing water valve 3 is opened to introduce washing water into the sealed casing 3, and the high-quality fibers remaining in the sealed casing 3 are recovered to the outlet side. After the high-quality fibers are collected, only water and foreign matter remain in the sealed casing 3, and the foreign matter is discharged to the outside of the yarn by fully opening the reject valve (2). All these operations are automatically controlled and operated unmanned.

Further, the impeller 7 is connected to a motor 36 via a rotating shaft 37.
Although it is configured to be driven while being controlled by a speed change mechanism or a speed increasing mechanism or a clutch mechanism, each of the control valves (1 to 6), each detector, and a timer may be controlled by data. It is connected to a computer unit (not shown) of the processing section and constitutes a control circuit,
゛Fixed internally by the computer unit that includes an A/D converter and a D/A converter that input data on disintegration conditions such as raw material processing amount, raw material type, raw material concentration, inlet/outlet pressure difference, and load as analog signals and convert them into digital signals. The data and the input data are compared and processed and the rotary impeller 7 is
It is preferable to control the motor that drives the motor, control the opening and closing of the control valves V, to (5), and continuously display the digital display on the display.

In the figure, 34 is a base, 35 is a bearing portion, and 38 is a transmission member.

In the example shown in FIG. 6, the circulation flow path 24 is formed in the partition wall 12 and installed inside the casing 3, so that the piping structure can be omitted.

In the examples shown in Figs. 7 and 8, a conical gear-like disintegrating blade is used instead of a multi-stage gear-like disintegrating blade, and the gear-like disintegrating blades 81 arranged in a ring shape are held at an angle in the axial direction of the impeller. A cone-shaped member 181 is used, and this is inserted and arranged with a gap left in a 10° tapered hole in which gear-shaped blade portions 9□ are arranged.

〔Effect of the invention〕

The present invention provides a useful fiber recovery chamber by providing a screen on one inner surface of a sealed gauging equipped with a raw material supply port and a foreign matter discharge port to separate the raw material into useful fibers and impurity foreign matter bones. The impeller is rotatably provided in the vicinity of the screen on the side of the foreign matter collection chamber, and a disintegrating blade is provided around the base of the impeller, and the disintegrating blade is opposed to the impeller. By equipping the casing with a fixed blade for disintegration, a shearing force is applied to the recirculated raw material generated by the impeller to efficiently disintegrate the undisintegrated pieces, and it is possible to efficiently disintegrate the undisintegrated pieces (if there are many undisintegrated pieces mixed in the raw material). However, the material disintegrating power is greatly increased without lacking the disintegrating action, and the recovery yield of useful fibers can be improved.In addition, the screen plate is less clogged and the processing capacity is good, and the raw material processing time is lengthened, increasing the production volume. In addition to greatly increasing the screen
The undisaggregated pieces are forcibly inserted between the blades and disaggregated, and the foreign matter is passed through without being crushed.The degree of crushing of foreign matter can also be adjusted, improving product quality, and eliminating not only coarse foreign matter but also fine debris. It is a device with high selection processing power that can separate useful fibers from foreign substances with a large disintegration capacity, and can be operated safely without causing overload phenomena.
Furthermore, the operation and operating time of the disintegration function can be adjusted depending on the amount and properties of undisintegrated pieces in the raw material, and the degree of foreign matter crushing can also be adjusted, and undisintegrated pieces that accumulate in the caning can be disintegrated preferentially during raw material operation, so that rejects can be eliminated. The I-processing system can be simplified, and the material supply pump can be a low-cost one, making it possible to provide a processing device that can perform efficient work at a low cost.

[Brief explanation of drawings]

Fig. 1 is a vertical side view of an embodiment of the present invention, Fig. 2 is a front view of the impeller, Fig. 3 is a partially expanded front view showing the inside, Fig. 4 is a system diagram in use, FIG. 5 is a flow sheet of the treatment process, FIGS. 6 and 7 are longitudinal sectional views of other embodiments, and FIG. 8 is a front view taken along the TI line in FIG. 7. DESCRIPTION OF SYMBOLS 1... Raw material supply port, 2... Foreign matter discharge port, 3... Sealed casing, 31... Lid body, 4... Screen,
5... Useful fiber recovery chamber, 6... Foreign matter recovery chamber, 7...
・Impeller, 8.8, ... defibration blade part, 9,91...
・Fixed blade part for disaggregation, 10...Tapered hole, 11...
Disc, 12... Partition wall, 13... Shim, 17...
Impeller chamber, 2L 22.2324, 25.26...
Flow path, ■, ~V6... valve. Patent applicant Aikawa Iron Works Co., Ltd.

Claims (6)

[Claims] (1) A screen for separating the raw material into useful fibers and impurities is installed on one inner side of the sealed casing, which is equipped with a raw material supply port and a foreign matter discharge port. A collection chamber is formed into a partition, and an impeller is rotatably provided near the screen on the side of the foreign matter collection chamber, and a disintegrating blade is provided around the base of the impeller, and a disintegrating blade is provided opposite to the disintegrating blade. A paper manufacturing reject processing device characterized in that a fixed blade part for disintegration is provided in a casing. (2) The disintegration blade is a cone-shaped member having gear-shaped blades arranged in a ring shape as external teeth in a plurality of stages or inclined in the axial direction of the impeller, and 2. The papermaking reject processing device according to claim 1, wherein the movable blade portion is provided in a protruding manner. (3) The fixed blade part for defibration is a plate-shaped member that is removably installed on a partition wall that partitions a foreign matter recovery chamber via a gap adjustment shim, and the fixed blade part for defibration 3. The papermaking reject processing device according to claim 1, wherein the reject processing device for paper manufacturing is formed as an internal tooth of a fitting hole that can be inserted with a gap. (4) A screen for separating the raw material into useful fibers and impurities is installed on one inner surface of the sealed casing, which is equipped with a raw material supply port and a foreign matter discharge port. A collection chamber is formed into a partition, and an impeller is rotatably provided in close proximity to the screen on the side of the foreign matter collection chamber, and a disintegration blade is provided on the impeller, and the disintegration blade is installed opposite to the disintegration blade with a gap. The foreign matter collection chamber is divided into an impeller chamber and a foreign matter recovery chamber by a partition wall provided with a fixed blade portion for disintegration, and the impeller chamber and the foreign matter recovery chamber are communicated with each other by a circulation flow path. Paper manufacturing reject processing equipment. (5) The partition wall is a partition plate that partitions a vertical surface of the casing and is installed opposite to the impeller, and has a mounting hole formed in the center thereof into which a fixed blade member for disintegration is removably inserted. The paper manufacturing reject processing apparatus according to claim 4. (6) The fixed blade part for disintegrating is a disc equipped with a tapered hole in which internal teeth with gear-shaped blade parts arranged around the periphery are provided in multiple stages or at an angle, and the tapered hole is connected to the impeller. 5. The paper manufacturing reject processing apparatus according to claim 4, wherein the disintegrating blade is disposed facing the disintegrating blade.