JPH03279483A - Papermaking disaggregation machine also used as duster - Google Patents

Abstract

PURPOSE:To increase purifying treating power, dusting ability and disaggregating ability by providing a closed casing with a screen and impeller in a specific state and dividing a fiber recovery chamber into a fine selecting chamber and a coarsely selecting chamber. CONSTITUTION:A closed casing 3 provided with a raw material feed opening 1 and a foreign matter outlet 2 is equipped with a screen 4 and divided into a fiber recovery chamber 6 and a foreign matter recovery chamber 5. An impeller 7 is rotatably set at the side of the foreign matter recovery chamber close to the screen 4, part at the outer peripheral side of the screen is made into a finely selecting part 41 and part at the inner peripheral side into a coarsely selecting part 42, which are made to correspond to a finely selecting chamber 61 and a coarsely selecting chamber 62 divided by a partition plate 10 and the chambers are provided with outlets 8 and 9, respectively.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is applicable to the production of new pulp, waste paper processing, or waste paper processing such as newspapers and magazines. , related to a paper disintegration and dust removal machine for processing papermaking raw materials including styrofoam pieces and vinyl pieces, discarding coarse foreign matter from the system with priority, and disintegrating undisintegrated pieces. It is.

[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. Glue jets from various separators used for waste removal are generally treated with screens.

However, since this reject contains a large amount of undisaggregated fibers as well as foreign substances, the screen is designed to have relatively large pores in order to recover the undisaggregated fibers. However, since foreign matter also passes through to the outlet raw material side, there is a tendency for the separation capacity to be insufficient, which is a problem. In this case, it goes without saying that the pore diameter of the screen should be as small as possible in order to prevent foreign matter circulation within the reject processing system and improve quality and machine operability, but it is also recommended to use a screen with a small pore diameter. As a result, there is a large loss of useful fibers that are discarded during the discharge of foreign matter, resulting in a problem of decreased yield.

On the other hand, if a powerful deflaker is used on the tail line to prevent a decrease in yield, foreign matter will be crushed and the screen will not be able to remove these foreign matter.
Eventually, quality and machine operability will be adversely affected.

Particularly in equipment that uses waste paper as a raw material, systems that use separators or round-hole screens as coarse selection equipment after pulping produce a large amount of tail, 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 processor 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 many of these conventional system processing machines, the impeller is rotatably installed in close proximity to a screen with holes of the same diameter. The difference in dust removal effect results in a decrease in quality. In other words, since the rotation speed of the inner circumference of the impeller is slower than that of the outer circumference, there is a risk that there will be a difference in the degree of dust removal, and in the case of raw materials that are relatively difficult to disintegrate, such as corrugated pole waste paper and raw materials, disintegration capacity may be insufficient. , a large amount of undisaggregated pieces are mixed in the tail, and a large amount of useful fibers are included in the waste lees, which are discarded out of the system together 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 play 1, reducing processing capacity, and undisaggregated fragments gradually accumulate during the raw material processing time.
The load on the tail increases, making it difficult to continue operation, which inevitably shortens the raw material processing time and reduces production.

The present invention aims to accurately eliminate these conventional drawbacks, and aims to disintegrate undisintegrated pieces by applying shearing force to the raw material by generating turbulent flow and loosening action on the raw material being circulated by an impeller. The degree of crushing can be adjusted according to the properties of raw materials and foreign matter, increasing the selection processing capacity for separating useful fibers from rejects and foreign matter, and reducing the amount of undisintegrated fragments and crushing of foreign matter. The purpose of this invention is to provide an inexpensive device that is useful for improving product quality, simplifies the processing system, and greatly increases the recovery of useful fibers.

[Means to solve the problem]

The present invention provides a fiber recovery chamber and a foreign matter recovery chamber by providing a screen for separating the raw material into useful fiber components and impurity foreign matter components in a sealed casing equipped with a raw material supply port and a foreign matter discharge port. a selective part formed into a partition, rotatably equipped with an impeller close to the screen on the side of the foreign matter collection chamber, a selection part having a small diameter hole on the outer circumferential side of the screen, and an opening larger than the hole on the inner circumferential side. Corresponding to the fine selection section and the rough selection section, the fiber recovery room is divided into a selection room and a rough selection room by a partition plate. This is a disintegrator and dust remover for paper manufacturing, which is characterized by having a communicating outlet.

[For production]

In the paper-making disintegrator and dust remover of the present invention, high-quality fibers in the raw material fed into the casing 3 from the raw material supply port 1 are rotated by the impeller 7, and carefully selected by the screen 4 disposed close to the rotating impeller 7. A fine selection room 6 which passes through the section 4 and the rough selection section 4□ and is divided by a partition plate 10. and rough selection chamber 6, and are sent to the next process from outlet ports 8 and 9, respectively. This selection room 6. Selected section 4. The undisaggregated fibers that cannot pass through the foreign matter collection chamber 5 are exposed to the shock wave of the impeller 7 rotating on the flat plate screen 4, the friction between the impeller 7 and the screen 4, and the holes (5 to 5) in the screen 4.
When passing through the impeller 7 (30 cranes φ), the fibers are disintegrated by the impact with the impeller 7, passed through the rough sorting chamber 6□ of the fiber recovery chamber 6, and returned to the raw material supply port 1 through the return path 11, where they are returned to the impeller 7 again. The fibers are sent to a screen 4 and passed through a screening section 4.

By repeating this action, the undisaggregated pieces are loosened and collected, and the amount gradually decreases, and the foreign matter in the raw material accumulates in the foreign matter collection chamber 5 in the casing 3, so open the valve 14 of the discharge flow path at an appropriate time to remove the foreign matter. should be removed from the discharge port 2. In any case, the raw material is agitated and circulated in the foreign matter recovery chamber 5, and is passed from the screening section 41 of the screen 4 to the screening chamber 61.
Useful fibers are passed through the filter, large-diameter undisaggregated pieces and foreign matter are passed from the rough sorting section 4□ to the rough sorting chamber 6□, and those remaining without passing through both screens are passed through the foreign matter discharge port 2.
It is intermittently removed from the system and processed.

On the other hand, by arranging the fine sorting chamber 6 and the coarse sorting chamber 6 □ opposite the impeller 7 which rotates close to the screen surface of the screen 4, the raw material fed into the screen undergoes swirling and swirling in the direction of rotation. Undisintegrated pieces that cannot pass through the screen 4 are flung away by centrifugal force by an impeller 7, loosened and disintegrated, and useful fibers are separated by centrifugal force into the sorting section 4. Carefully selected room 6. The coarse foreign matter in the raw material is blown to the outer peripheral wall of the foreign matter recovery chamber 5, falls and collects at the lower discharge port 2 while swirling around the peripheral wall, and is removed by intermittent opening and closing of the valve 14 of the outlet flow path. The undisaggregated pieces containing raw fibers that have passed through the rough sorting section 4□ pass through the rough sorting chamber 68, are circulated from the outlet 9 to the raw material tank 12 via the return path 11, and are transferred to the raw material tank 12 through the raw material transfer outlet pipe 13. It is returned to the room 6. Useful wIh that entered
The fibers are taken out of the casing system by controlling the opening and closing of the valve at the outlet 8 and are processed as raw materials in the next process.

That is, undisaggregated pieces in the raw material are rarely disintegrated and remain, and foreign matter cannot pass through the screen and gradually becomes concentrated in the foreign matter collection chamber 5 of the casing, which obstructs the passage of high-quality raw material to the outlet. When the motor load or the differential pressure at the inlet and outlet reaches a preset state, the large mouth valve is closed, washing water is introduced into the casing, and high-quality m-fibers remaining in the casing are collected at 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 reject valve, the foreign matter is discharged to the outside of the yarn, and all these operations are automatically controlled and operated.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 3. A raw material is placed on one inner surface of a sealed casing 3 that 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 useful fibers and impurities, for example, a flat screen plate in the form of a disk, is used to divide the foreign matter recovery chamber 5 and the fiber recovery chamber 6 into a foreign matter recovery chamber 5 and a fiber recovery chamber 6, and an impeller 7 is installed adjacent to the screen 4. The screening section 4. is rotatably equipped with a small-diameter hole provided on the outer peripheral side of the screen 4, where a relative speed difference with the raw material circulating speed generated by the impeller 7 occurs. and,
A coarse selection section 43 is provided with a large-diameter hole having an opening area larger than that of the hole on the inner peripheral side, and a fiber recovery chamber 6 is provided with a partition plate 10 corresponding to the selection section 41 and the rough selection section 4□. It is divided into a fine sorting chamber 61 and a rough sorting chamber 6□, and each chamber 6.6□ is provided with an outlet 8.9 that communicates with the raw material. connected to the tank 12, and the raw material tank 1
This is a disintegrator and dust remover for paper manufacturing, which has a closed casing 3 with a circulation path connected from 2 to the raw material supply port 1 by a raw material transfer pipe 13.

In this case, the screen plate is selected from a round hole plate, a long hole plate, or a slit plate, and the coarse selection section 4t facing the inner circumference side of the impeller is replaced by the fine selection section 4t on the outer circumference side. The opening area may be larger than the hole diameter, for example, 1.1 to 3.0 times, or the opening area may be gradually increased toward the inner circumference, and the hole or slit size is not limited to the same size but may have different sizes. Consideration should be given to selecting the appropriate fibers to improve the dust removal effect and the recovery rate of useful fibers. Furthermore, the fine selection section 41 and the rough selection section 4 of the screen 4. Although it is formed as one piece, it may be constructed by combining separate pieces.

In the figure, 15 is a pump, 16, 17, and 18 are valves, and 19 is a next process device.

The raw material supply port 1 is connected to a raw material flow path with a valve, and the foreign matter discharge port 2 is connected to a discharge flow path with a valve 14.
Further, the selected raw material outlet 8 is connected to a discharge flow path with a valve 18, and the raw material flow path or the sealed casing 3 is provided with a wash water supply flow path with a valve and an air bleed valve as required. An exhaust flow path (not shown) is provided, and the operations of supplying raw materials and washing water and discharging foreign matter and selected raw materials are performed by opening and closing valves provided in each flow path. Including the wash water supply valve provided in the casing 3,
The multiple valves are repeatedly opened and closed, and the rigid process is performed.

That is, water filling process, raw material treatment process, disintegration process, washing process,
Perform the foreign matter discharge process 0 For example, if too much foreign matter accumulates inside the casing 3, it will overload.

To prevent quality deterioration, close the valve of the raw material flow path, open the valve of the washing water supply flow path, wash the inside of the casing 3 to recover high-quality fibers, close the valve of the outlet flow path, and open the discharge flow path again. The valve 14 of the passage is opened to discharge foreign matter from the system. Then valve 1 again
4 is closed, the valve of the washing water supply channel is opened to fill water into the casing 3, and the valve of the raw material channel and the valve of the outlet channel are opened to allow the raw material containing high-quality fibers to pass through.

In addition, when discharging foreign matter, when the load of the timer or motor or the differential pressure at the entrance and exit reaches a preset state, the large mouth valve is closed, and the cleaning water is introduced into the sealed casing 3 and the remaining water remains inside the sealed casing 3. The high quality fibers are collected on the exit side. After the high-quality fibers are collected, the inside of the sealed casing 3 becomes only water and foreign matter, and by fully opening the valve 14, the foreign matter is discharged to the outside of the yarn. Consideration is given to ensuring that all these operations are automatically controlled and operated unmanned.

Further, the foreign matter accumulated in the casing 3 may be discharged not in a batch manner but continuously by opening a valve little by little from the casing 3.

Note that the impeller 7 is connected to a motor 21 via a rotating shaft 20.
Although it is configured to be driven while being controlled by a speed change or speed increasing mechanism or a club mechanism, the multi-valve, each detector, and the timer may be controlled by a computer unit (not shown) of the data processing section. ), and a control circuit is configured to control the raw material processing amount, raw material type,
A that inputs data on disintegration conditions such as raw material concentration, inlet and outlet pressure difference, and load as analog signals and converts them into digital signals.
The computer unit including a /D converter and a D/A converter compares and processes internal fixed data and input data, controls the motor that drives the rotary impeller 7, controls the opening and closing of the valve, and continuously displays the display unit. It is a good idea to drive while using the digital display.

〔Effect of the invention〕

The present invention provides a fiber recovery chamber and a foreign matter recovery chamber by providing a screen for separating the raw material into useful fiber components and impurity foreign matter components in a sealed casing equipped with a raw material supply port and a foreign matter discharge port. a selective part formed into a partition, rotatably equipped with an impeller close to the screen on the side of the foreign matter collection chamber, with a small-diameter hole provided on the outer peripheral side of the screen, and an opening area larger than the hole on the inner layer side. The fiber recovery chamber is divided into a fine sorting chamber and a rough sorting chamber by a partition plate corresponding to the fine sorting section and the rough sorting section, and communicates with each chamber. By providing an outlet to remove dust, the dust removal effect can be carried out efficiently without becoming unbalanced. Furthermore, by applying shearing force to the raw material, undisaggregated fragments are efficiently dissolved, and many undisaggregated fragments are mixed in the raw material. However, the recovery yield of useful fibers can be improved without insufficient disintegration action, and the screen is less clogged and the processing capacity is good, greatly increasing the production volume. It can be adjusted to improve product quality, accurately separate not only large foreign substances but also fine dust, and has large dust removal and disintegration capabilities, and high selection processing power to separate useful fibers from foreign substances, enabling highly efficient work. .

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a front view taken along the line II in FIG. 1... Raw material supply port, 2... Foreign matter discharge port, 3... Closed tank, 4... Screen, 41... Selection section, 4□... Rough selection section, 5...・Foreign matter collection room, 6... Fiber recovery room, 61... Selection room, 62... Rough selection room, 7.
... Impeller, 8.9... Outlet, 10... Partition plate, 11... Return path, 12... Raw material tank.

Claims (2)

[Claims] (1) A screen is installed in a sealed casing equipped with a raw material supply port and a foreign matter discharge port to separate the raw material into useful fiber components and impurity foreign matter components, dividing the raw material into a fiber recovery chamber and a foreign matter recovery chamber. a selective part having a rotatable impeller close to the screen on the foreign matter collection chamber side, a selection part having a small diameter hole on the outer peripheral side of the screen, and an opening area larger than the hole on the inner peripheral side. and a coarse selection section with large diameter holes,
The fiber recovery chamber is divided into a fine sorting chamber and a rough sorting chamber by a partition plate corresponding to the fine sorting section and the rough sorting section, and an outlet communicating with each chamber is provided. Dust remover. (2) Claim 1, wherein the sealed casing includes a circulation path that connects the outlet of the rough sorting chamber to the raw material tank via a return path, and connects the raw material tank to the raw material supply port with a raw material transfer outlet pipe. The paper-making disintegrator and dust remover mentioned above.