JPH01139886A - Apparatus for beating and refining old paper raw material - Google Patents

Abstract

PURPOSE: To obtain the subject used paper stock-dissolving and screening machine that can efficiently recover a fibrous substance in high yield and gives the paper stock of good quality with reduced foreign contaminants in a stabilized concentration, flow rate, and quality by combining a pulper, a separated auxiliary pulper and a composite screen in one unit. CONSTITUTION: This pulper P, a separated auxiliary pulper U and a composite screen T are combined and concentrated in one unit so that the inner peripheral area of the crude sieve holes of the strainer of the pulper P is communicated to the tank 25 of the pulper, while the outer peripheral area of the fine sieve holes of the strainer is communicated to the tank 34 of the screen T. The agitation impeller 3 is arranged near the strainer of the pulper P to discriminate slightly dissolving substances from useful fibrous substances. In the pulper U, the mixed useful fibrous substance is separated from the slightly dissolving substance and sent together with the useful fibrous substance from the pulper P to the composite screen where these fibrous substances are doubly purified.

Description

DETAILED DESCRIPTION OF THE INVENTION A1.Objective of the invention (industrial application field) The present invention is a combination of a pulper and a separation auxiliary pulper used in the paper manufacturing industry to select the dissolving ability of raw materials, especially waste paper and moisture-loss resistant paper. A device that is a combination of a screen and a concentrated device. Specifically, the 14 poorly soluble substances (non-fibrous substances and poorly dissolvable paper stock) in the raw materials supplied to the pulper tank and the useful fibrous substances are separated into an inner circumference and an outer circumference by coarse holes provided in the strainer. The difficult-to-dissolve i4 substances are sent to the separation auxiliary pulper, and the useful fiber substances from the difficult-to-dissolve and dissociate substances are separated and recovered by the solubility and washing, and the defective substances are removed from the system. In addition to discarding useful fiber materials to enable stable operation of the pulper, useful fiber materials are sent to a composite screen and double-selected using two types of strainers to eliminate waste of useful fibers and produce high-quality, high-precision fibers. This invention relates to a device that obtains paper stock and performs stable production.

(Prior technology) Traditionally, in the paper industry, pulpers used to melt raw materials such as waste paper and moisture-proof paper were used to improve performance before melting by partially changing the shape and size of the strainer. This invention is based on the inventor's invention, and is disclosed in Japanese Patent Application No. 13275/1986.
As shown in Figure 2 of the drawing, this application has coarse holes 5 at the bottom of the tank 1 that contains the raw materials to be treated.
A strainer 4 is provided which is divided into an inner circumferential area a and an outer circumferential area of the narrow hole 6, and the inner circumferential area a is recessed. are arranged close to each other, and two chambers 8 and 9 are provided on the downstream side of the strainer 4, with an inner circumferential area a and an outer circumferential area communicating with each other. The difficult-to-dissolve materials such as paper and non-fibrous materials float up to the upper layer on the vertical circulation caused by the impeller 3 and flow down toward the center of the rotor. The fibers are introduced into the inner peripheral area of the tank and discharged outside the tank through the coarse holes, so that they do not stagnate in the tank for a long time, so they do not become finely ground and mix with the useful fibrous materials, thereby reducing their quality. .

The 11 large pieces of the difficult-to-dissociate substance introduced into the recessed inner peripheral area of the strainer are crushed near the center of the impeller corresponding to this part, so that the crushing is quickly carried out and It is possible to minimize the occurrence of

This method can crush and remove residual substances that are difficult to remove using conventional lugger equipment, which wraps foreign objects around a rope hanging inside the pulper tank and discharges them outside the tank, so this does not cause any problems with pulper operation. Therefore, the unnecessary labor of cleaning the inside of the tank can be eliminated, increasing operating efficiency and improving operability.

It had the following characteristics.

(Problems to be Solved by the Invention) However, even if the hardly soluble female substances and the useful fibrous substances are separated and discharged by the above-mentioned pulper, it is not possible to rationally separate the discharged hardly soluble female substances and the fibrous substances. Without proper post-processing, it will not be possible to completely efficiently recover the useful fibrous substances mixed in and discharged into the storage room that are difficult to dissolve and to select the useful fibrous substances. There was a problem that it could not be used to its full potential.

The present invention has been made in order to solve the above-mentioned conventional problems, and uses a combination of an improved strainer and a rotor of the pulper to distinguish between difficult-to-dissolve substances and useful fiber substances, and to The hardly soluble female substances are sent to the auxiliary pulper, the mixed useful fiber substances are separated by stirring before dissolution and washing, the defective substances are discarded, and the recovered useful fiber substances are as described above. It is sent to a composite screen together with the useful fibrous material from the pulper, and is double-selected using a flat and cylindrical strainer to completely remove foreign matter. The purpose of the present invention is to provide a pre-dissolution screening device for waste paper raw materials that can obtain a small amount of high-quality paper stock with stable concentration, flow rate, and quality.

3. Structure of the Invention (Means for Solving the Problems) The means of the present invention for achieving the above-mentioned object is such that the inner peripheral area a of the I hole 5 is and a strainer 4 in which the outer circumferential area of the wire mesh hole 6 is sectioned, and a stirring impeller 3 is arranged close to the strainer 4,
On the 1ζ flow side of the strainer 4, there is an inner peripheral area a of the coarse hole 5.
and two chambers 8 each communicating with the outer peripheral area of the narrow hole 6.
．． 9 and a tank 25 containing a liquid of a difficult-to-dissociate substance from one chamber 8 of the pulper P.
The tank 25 is equipped with a cleaning means 29.29° (li:i) and the other chamber 9 of the pulper P. Tank 3 for storing liquid of more useful fiber substances
4, a flat strainer 33 with fine holes 32 and a cylindrical strainer 40 with fine holes 39 located downstream thereof are disposed, and the flat strainer 33 is equipped with an impeller 35, and the cylindrical strainer 40 is equipped with a rotor with blades 43. The present invention consists in the configuration of a pre-dissolution screening device for waste paper raw materials, characterized in that a composite screen T in which 42 screens are arranged in close proximity is combined in a concentrated manner.

(Function) The pre-dissolution screening device for waste paper raw materials of the present invention configured as described above charges the waste paper raw materials into the tank 1 of the pulper P, and
．． When the solubility treatment is carried out by setting a concentration of 5 to 5%, the poorly soluble and dissociable substances in the raw materials are crushed into coarse particles by the cooperation of the coarse holes 5 and the impeller 3, and can pass through the coarse holes 5. Flows quickly into the chamber 8, so the dissolvable fibrous raw material from which the hardly dissolvable substances are mainly flowed in the flat outer peripheral area of the strainer 4, and the dissolvable fibrous raw material from which the hardly dissolvable substances have been removed flows, and the flow between the fine holes 6 and the impeller 3. The materials that are crushed by the cooperation and can pass through the mesh holes 6 flow into the chamber 9, and the dissolvable fibers and the hardly dissolvable substances are sent to the next process through separate pipes 11 and 13. It will be done.

The hardly soluble and separable substances sent intermittently from the pulper P through the conduit 11 enter the front chamber C of the tank 25 in the separation auxiliary pulper U, where they are stirred, dissolved and separated by the rotation of the impeller 27, and become the hardly soluble substances. The useful fibrous material mixed in the release material is separated and passed through the fine holes of the strainer 24' to the rear chamber (
After a certain period of time has elapsed, the load power increases to the set power due to an increase in the amount of defective materials.
When dilution cleaning is performed by supplying cleaning water into the tank 25, the impeller 27 stirs and cleans the defective substances remaining in the tank 25, and the useful fiber substances remaining attached thereto are washed out and fed. At this time, the valve V5 of the washing water pipe 29 is closed, and the valve 6 of the compressed air pipe 29' is opened to feed the tank 25, thereby sending the remaining liquid to the rear chamber d through the narrow hole of the strainer 24, which is useful. The fibrous substances have been almost completely recovered and only the difficult-to-dissolve substances remain in the front chamber C.
Open the valve ■5 to supply water, and then open the discharge valve ■ at the bottom of the tank 25.
4 is opened and the washing water is disposed of outside the system for the next treatment.

Further, the liquid of useful fiber material continuously sent out from the pulper P through the pipe line 13 is transferred to the tank 34 of the composite screen T.
The foreign matter that enters the tank 34 is dissolved by the impeller 35 in the front chamber e, and the mixed foreign matter is discharged out of the tank 34 by the discharge means 37, and the useful fibers that can pass through the flat screen 33 pass through the fine holes 39. In the rear chamber f, it is stirred by the rotation of the rotor 42, and through the narrow hole 39 of the cylindrical strainer 40 by the action of the blade 43, it flows into the outer chamber g. This selected raw material liquid is sent through a pipe 41 to a filter in the papermaking raw material process. However, the raw material liquid in the reject tube 44 does not return to the previous process of the composite screen T.

(Example) An example of the implementation of the pre-dissolution screening device for paper stocks according to the present invention will be described below with reference to the drawings.

In Figures 1 and 2 of the drawings, P is a pulper, and a power 2
A strainer 4 is arranged around the impeller 3, and the strainer 4 is divided into an inner circumferential area a and an outer circumferential area a as shown in FIG. A is recessed and a coarse hole 5 of 75IIIΦ is provided in this part, and the outer peripheral area is made flat and has a diameter of 6 to 1
A fine hole 6 with a diameter of 2 mm is formed, and a chamber 8 separated by a partition wall 7 and communicating with the coarse hole 5 in the inner peripheral area a, and a chamber communicating with the fine hole 6 in the outer peripheral area are formed on the lower side of the strainer 4. 9, and when raw materials are fed into the tank 1 by the conveyor 10 as shown in FIG. 1, the raw materials flow on the vertical and horizontal circulation caused by the rotation of the impeller 3, and the hardly soluble female substances absorb water. Since it is hard and does not become heavy, it descends from the center and enters the concave inner circumferential area a, where coarse particles are crushed and other particles are quickly sent out from the coarse hole 5 to the chamber 8 without being crushed. When the pump 12 installed in the discharge pipe 11 equipped with the valve V1 from the chamber 8 is operated, it is fed to the separation auxiliary pulper, which will be described later, and the useful fiber material is sent from the narrow hole 6 to the chamber 9, and the pump 12 installed in the discharge pipe 13 is The cyclone separator 1 is
5, which separates foreign substances and feeds directly to the composite screen described later, or depending on operational requirements, the first
As shown by the chain line in the figure, the waste is once sent from the cyclone separator 15 to the storage tank 16, and the collected material is sent to the composite screen by the pump 17, where it is subjected to the following treatment. The pulper P is equipped with an auxiliary tank 11 that receives the raw material liquid returned from other processing equipment as necessary, and can overflow into the tank 1 from the top, and a supply pipe 18 equipped with a valve V2 is connected to the bottom. It is.

Additionally, there is a foreign matter trapping pocket 20 equipped with a discharge valve V3 for capturing heavy foreign matter in the tank 1 and disposing of it outside, and a rope that hangs down into the tank 1 to entangle coarse foreign matter and then pulls it out of the tank 1 and discards it. In some cases, a type aggregation device 21 is installed as an accessory device.

U is a separation auxiliary pulper that separates and recovers useful fibers from the difficult-to-dissolve substances sent from the pulper P through the discharge pipe 11. The inside of the tank 25 is separated into a front chamber by a strainer 24 having a fine hole 23 with a well-known contamination 22. The front chamber C is divided into a rear chamber d and an impeller 27 rotated by a power 26 is arranged close to the strainer 24 side of the front chamber C, and a residue amount 28 after cleaning is provided on the lower side of the front chamber C. , there is a valve at the bottom ■4
A cyclone separator 30 is equipped with a cyclone separator 30 on the outer periphery of the upper part, which separates heavy foreign matter by receiving heavy foreign matter thrown out by the turning force.
is connected, heavy foreign matter is removed to the lower foreign matter amount, and the raw material liquid containing fibers returns to the C chamber again. When the amount of foreign matter in the front chamber C increases and the load power increases and reaches the set power, the pump 12
stops, and the feeding of raw materials also stops. Next, washing water is sent from the water pipe 29 equipped with the valve V5 to dilute and wash the raw material liquid inside, and after washing, the water supply is stopped and compressed air is sent through the compressed air pipe 29 equipped with the valve V6, and the front chamber C The diluted raw material solution containing useful fiber substances in the rear chamber d is transferred to the pulper P.
When the hardly soluble substances in the pulper P are sent to the auxiliary separation pulper U through the above-mentioned route, they are circulated by the impeller 27 and subjected to agitation cleaning, and are separated into defective substances. The mixed useful fiber substances are separated and sent to the tank 19 from the outlet pipe 31, and the stagnant defective substances are washed with water to force the adhering useful fibers to be separated, so that the useful fiber substances can be recovered without waste. It's Nishide.

Incidentally, if the pump 12 provided in the discharge pipe 11 is provided in the outlet pipe 31 as shown in FIG.
The raw material liquid suctioned from the auxiliary separation pulper U is taken into the auxiliary separation pulper U only by suction, and the raw material liquid discharged from the auxiliary separation pulper U is fed under pressure to the pulper P.

T is a composite screen that carefully selects the fiber material sent from the above-mentioned pulper, and the front chamber e and rear chamber f, where the tank 34 is divided, are bent once by a flat strainer 33 having fine holes 32 of about 3 mmΦ. The flat strainer 33 of e.
An impeller 35 rotated by a power 34 is arranged close to the side, and a feed pipe 36 for useful fiber material and a cyclone separator 31 for discharging heavy foreign matter by swirling force are connected to the peripheral wall, corresponding to the impeller 35. A light-weight foreign matter discharge pipe 38 is connected to the center of the side wall, and a 0.3 m pipe is connected to the outside of the rear chamber
An outer chamber g is provided which is isolated by a cylindrical strainer 40 having a slit-shaped cylindrical strainer 39.
A delivery pipe 41 for the selected raw material is connected to the rear chamber f, and a rotor 42 rotated by the same power as the impeller 35 is arranged inside the rear chamber f, and blades 43 are attached to the circumferential surface of the rotor 42. There is an outlet pipe 44 for reject raw material liquid at the end of f.
When the useful fiber material liquid is sent to the front chamber e, it is stirred and circulated by the impeller 35 to perform disintegration and separation of mixed foreign substances, and the raw material that can pass through the plane strainer 33 is sent to the rear chamber f. The inflow is circulated along the cylindrical strainer 40 by the blades 43 of the rotor 42, and the material that passes through the strainer 40 is sent from the outer chamber g to the papermaking process as selected stock, and the material that cannot pass through the strainer 40 is sent to the subsequent process. Sent to storage tank 45 and composite screen T
It is not returned to the previous process, but is sent from the storage tank 45 to the reject raw material processing system by the pump 46, and is further processed separately by this system 47, and the discharged useful fiber material is sent to the washing and concentrating device to be described later. The substance liquid is sent to a storage tank 48, and sent by a pump 49 to a disintegration separator to be described later, where it is subjected to the next treatment.

F is a washing and concentrating machine that adjusts raw materials before paper making, which receives selected raw materials into a tank 50, washes them with a filter 51 provided inside, extracts water, and sends them to the raw material adjustment process before the paper machine.

D is a disintegration separator that receives and processes lightweight foreign matter sent out from the above-mentioned composite screen T, and has a length of 1.5 to 6 m.
A front chamber and a rear chamber i are separated by a flat strainer 53 having a narrow hole 52 of mΦ.
An impeller 55 rotated by a power 54 is arranged close to the third side, an intake pipe 56 for lightweight foreign matter sent by the pump 49 is placed in the upper part of the front chamber, and residual foreign matter is discharged in the lower part and sent to a vibrating screen to be described later. A discharge pipe 57 is connected to the storage tank 4 in which the useful fiber material passed through the strainer 53 is stored in the rear chamber g.
By connecting the feed pipe 59 for feeding the composite screen T paste to the storage tank 48, the composite screen T paste product stored in the storage tank 48 is agitated and circulated by the impeller 55, and the useful fibers passed through the strainer 53 are stirred and washed. The substance is in storage tank 4
The remaining foreign matter is sent to a vibrating screen 58 through a discharge port 57 to remove foreign matter, and the useful fibers are returned to the pulper P for reprocessing. Depending on the type of foreign matter, the vibrating screen may be omitted and disposed of.

W is a washing screen used in place of the above-mentioned disintegrator and separator, and a cylindrical casing 60 is provided with a screen basket 61 of the same shape and a secondary chamber 62 enclosing the same, and the upper periphery of the casing 60 is Inlet pipe 6 of processed material on the surface
3, a light waste outlet pipe 64 in the center, and a secondary chamber 6.
2 are respectively connected to outlet pipes 65 for selected paper stock, and an agitator 67 rotated by a power 66 is provided inside the screen basket 61. When the raw material to be treated is fed from the inlet pipe 63, the raw material is The pushing pressure and
The raw materials that can be effectively sorted and passed through the screen basket 61 by the pulsating pressure generated by the agitator 67 are as follows:
It exits into the secondary chamber 62 and is sent from the outlet pipe 65 to the storage tank 45 where the composite screen T paste product is stored.The heavy foreign matter that cannot pass through is discharged from the outlet pipe 68 to the foreign matter reservoir 69, and the light foreign matter floating upward is sent to the exit pipe 64. The waste material is disposed of into a foreign matter reservoir 69.

C. Effects of the invention As mentioned above, the waste paper raw material solubility selection device which intensively combines the pulper, separation auxiliary pulper and composite screen of the present invention is made possible by the characteristics of the pulper with an improved combination of strainer and rotor. By breaking the poorly soluble and separable substances in the raw materials into large pieces and quickly discharging them out of the tank, only the useful fiber substances can be dissolved and discharged separately from the hardly soluble substances, thereby producing high purity paper. Not only can the useful fiber materials mixed in the discharged difficult-to-dissolve and dissociate materials be almost completely recovered by stirring dissociation and washing in one of the separation auxiliary pulpers, but at the same time, the bad materials can be removed. The useful fiber material is disposed of outside the system to eliminate pulper obstruction, and the useful fiber material is double sorted using two types of stoners in the other composite screen to produce high-quality carefully selected paper with no foreign matter mixed in and with a uniform degree of dissociation. Since the rejected or rejected raw materials are not returned to the process before the composite screen, it eliminates the adverse effects of circulation of defective materials in the system in the treatment of difficult-to-dissolve waste paper raw materials, and this eliminates the disadvantages of the pulper described above. By making full use of these characteristics, high-quality paper stock can be stably and efficiently obtained by eliminating the waste of useful fiber substances.

A device that partially combines a pulper, a separation auxiliary pulper, and a composite screen always captures harmful substances harmful to raw material processing and prevents impurity of the raw material liquid, so when it is accepted into the composite screen, Concentration and flow rate 1 quality are continuously stable, and the quality of the selected raw material at the outlet is also superior to conventional ones, with less contamination by minute foreign matter, and furthermore, concentration and flow rate are stable.
Since the flow rate is constant, smooth operations can be maintained.

In the case of corrugated waste paper processing, the amount of reject raw material liquid sent to the storage tank from the exit pipe of the composite screen and the return raw material outlet of the lightweight reject processing equipment was about 30% in the past, but in the present invention, is only about 25%, and therefore the reject processing device in the raw material adjustment room can be made smaller by this amount.

It is convenient to process all three wastes at once, and the operation is stable. Therefore, highly reliable automatic control is possible.

It has the following unique effects.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram showing an example of implementation of a device related to the present invention. FIG. 2 is a schematic diagram showing a partial change in the piping of the separation auxiliary pulper. FIG. 3 is a longitudinal sectional front view showing the structure of the pulper in the same as above. FIG. 3 is a longitudinal sectional side view showing the structure of the separation auxiliary pulper in the same as above. FIG. 4 is a longitudinal sectional front view showing the structure of the composite screen according to the above. P: Pulper U: Separation auxiliary pulper 1: Tank 4 Strainer a: Inner area b: Outer area 5: Coarse hole
6: Narrow hole 3: Impeller 8.9: Two chambers U
: Separation auxiliary pulper 24 = Tank 23 Ny strainer 27 : Impeller 29 and 29° : Cleaning means 'I
゛: Composite screen 33: Plane strainer 40:
Cylindrical strainer 42 Rotor with blade 43 Seimitsu January 12, 2016 Director General of the Japan Patent Office Yoshi 1) Takeshi Moon 1, Indication of the incident 1986 Patent Application No. 186899 2, Name of the invention Dissolving waste paper raw material is a selection device 3. Relationship with the case of the person making the amendment Patent application Address 191 Yuzuki, Shizuoka City, Shizuoka Prefecture Representative Aikawa Otsuhiko 4 Agent postal code ■] Possible - Roro Address Nishikusabuka-cho, Shizuoka City, Shizuoka Prefecture No. 9, No. 4, No. 7-,,-]25, Date of amendment order (starting point) December 20, 1985 6, Subject of amendment, 1 in the specification, page 20, lines 12 to 14 FIG. 3 is a longitudinal sectional front view of the same as above. 1. FIG. 4 is a longitudinal sectional side view showing the structure of the separation auxiliary pulper in the same as above. FIG. 5 is a longitudinal sectional front view showing the structure of the composite screen according to the above. , I correct it. that's all

Claims (1)

[Claims] A strainer is provided at the bottom of the tank containing the raw material to be treated, and the inner peripheral area of the coarse holes is divided into the outer peripheral area of the fine holes.A stirring impeller is disposed close to the strainer, and the coarse holes are disposed downstream of the strainer. A pulper is provided with two chambers each communicating with the inner peripheral area of the pores and the outer peripheral area of the fine holes, and a tank containing a liquid of a difficult-to-dissolve substance discharged from one of the chambers of the pulper. , a strainer with fine holes and an impeller disposed close to the strainer are provided, and the tank contains a separating auxiliary pulper equipped with a cleaning means and a liquid of useful fibrous material discharged from the other chamber of the pulper. A flat strainer with fine holes and a cylindrical strainer with fine holes located on the downstream side of the strainer are arranged in the tank, and an impeller is attached to the flat strainer,
A dissolving and separating device for waste paper raw materials, characterized by a combination of a cylindrical screen and a composite screen in which rotors with blades are arranged close to each other.