JP2002273260A - Circulating and separating equipment for recycling of used paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide circulating and separating equipment for recycling of used paper diapers constituted in such a manner that pulp, absorptive polymers and fine plastic bags can be surely separated and high-grade pulp can be recovered. SOLUTION: A circulating and separating tank 2 is provided with a spout pipe for spouting the liquid in which the pulp, the absorptive polymers and the parted plastic bags coexist from the prescribed depth of the tank. The equipment is provided with a plastic bag scraping device 4 for scraping the floating plastic bags, is provided with a absorptive polymer take-out pipe 7 for taking out the settled absorptive polymers and is provided with a pulp take-out pipe 6b for taking out the water containing pulp.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for separating and recovering pulp and a polymer-absorbing polymer of used disposable diapers discarded after use and reusing them.

[0002]

2. Description of the Related Art Conventionally, disposable disposable diapers have been undesirably sanitary in the subsequent disposal of waste. In recent years, the amount discarded from medical facilities and the like for use by elderly people and adults has become extremely large, and the environment for subsequent treatment, storage, and transportation has become extremely unfavorable in terms of sanitation. On the other hand, there is a separation and collection process for separating and collecting pulp and the like in the disposable diaper so that the pulp can be reused. The pulp recovered by the conventional recovery process contains a polymer absorbing polymer used for disposable diapers and a small amount of fine vinyl entangled in fibers. When the polymer-absorbing polymer and the fine vinyl remained in the recovered pulp, they could be used as low-grade soil conditioners, but could not be converted into high-grade recycled pulp.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to solve these conventional problems and to improve the pulp,
It is an object of the present invention to provide a circulating separator for reusing used diapers, which can surely separate a high-molecular polymer and a fine vinyl and can recover the high-quality recycled pulp.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) A used paper diaper is divided and a liquid in which pulp in the paper diaper, a polymer-absorbing polymer and vinyl separated are mixed at a predetermined depth. An ejection pipe for injecting upward from the position is provided in the circulation separation tank, a scraping means for scraping the floating vinyl is provided, and an outlet for taking out the precipitated polymer absorbing polymer to the outside is provided in the circulation separation tank. Provided in the lower part, provided with pulp take-out means for taking out water containing pulp from the upper part of the circulating separation tank, separating the pulp and the polymer absorbing polymer by the difference in specific gravity of the pulp and the polymer absorbing polymer or the difference in sedimentation speed in the liquid. A circulating separator for reusing used disposable diapers that can be recovered 2) Pulp removal means is provided with a pulp weir of a predetermined height in a circulating separation tank. The circulating separator for reusing the used disposable diaper according to the above 1), wherein the pulp-rich liquid which has passed the weir has been sent to the outside. 3) An adjusting means for adjusting the flow rate of the liquid blown out from the ejection pipe is provided. A circulating separation apparatus for reusing used disposable diapers according to claim 1) or 2) 4) The velocity of the pulp / polymer-absorbing polymer liquid ejected from the ejection pipe is equal to or slightly higher than the sedimentation rate of the polymer. A circulating separator for recycling used paper diapers according to any one of the above 1) to 3), wherein the circulating separator is provided with an adjusting means for adjusting the pulp, a pulp, a polymer-absorbing polymer, and a vinyl before being sent to a circulating separation tank. Is provided with a crushing tank for temporarily storing the liquid mixed with water, a stirring means is provided to stir the inside of the crushing tank, the pulp, polymer-absorbing polymer and vinyl in the liquid are released and finely crushed, and then the circulation separation tank The circulating separator for recycling used paper diapers according to any one of the above 1) to 4), which can be sent 6) The pulp liquid and the polymer-absorbing polymer liquid taken out from the circulating separation tank are separated by a screen. And the separated liquid component can be reused in the circulating separation apparatus for reusing a used paper diaper according to any one of the above 1) to 5).

[0005]

According to the present invention, the liquid circulating in the upper portion of the circulation separation tank is ejected upward from a predetermined depth position of the circulation separation tank by mixing the pulp, the polymer-absorbing polymer, and the separated vinyl. Causes the pulp to float in the stream, causes the high-molecular-weight absorbent polymer to quickly settle to the bottom of the tank, and causes the light-weight, divided vinyl and fine vinyl to float. The raised vinyl is scraped off by scraping means. The polymer-absorbing polymer is taken out from the outlet provided at the lower part of the circulation separation tank, and the pulp is taken out from the upper part of the circulation-separation tank by the pulp take-out means. it can. If the pulp removal means is configured with a pulp weir, pulp of a liquid containing a large amount of pulp separated from the circulating separation tank by continuously sending a mixture of pulp, polymer-absorbing polymer, and vinyl to the circulating separation tank Processing is performed continuously by sending the material outside the weir to the outside. The one provided with the adjusting means for adjusting the flow rate of the liquid ejected from the ejection pipe ensures that the liquid in which the pulp, the polymer-absorbing polymer, and the separated vinyl are mixed is ejected from the ejection pipe at an appropriate flow rate capable of surely separating the liquid. . The one provided with the adjusting means for adjusting the speed of the liquid ejected from the ejection pipe makes the ejection speed of the liquid equal to or slightly higher than the sedimentation speed of the pulp, so that the pulp reliably floats on the upper part of the circulation separation tank. The one that is provided with a grinding tank is
Pulp temporarily stored in the crushing tank, polymer absorbing polymer,
The liquid mixed with vinyl is stirred by a stirring means to remove the entanglement of the pulp, polymer absorbing polymer and vinyl in the liquid, finely pulverized, and then sent to the circulation separation tank. The pulp liquid and polymer-absorbing polymer liquid taken out from the circulation separation tank are separated from the liquid component by a screen.The pulp liquid is separated into pulp and liquid by a screen, and the polymer-absorbing polymer liquid is polymerized by a screen. The liquid is separated into the absorbent polymer and the liquid, and the separated liquid is collected and reused.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Generally, a pulp solution containing a large amount of pulp and a polymer absorbing polymer solution containing a large amount of a polymer-absorbing polymer are taken out of a circulation separation tank, and then the liquid components are separated with a screen or the like. As appropriate, the pulp, the polymer-absorbing polymer and the liquid may be separated and recovered in a circulation separation tank.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described with reference to the drawings. The embodiment shown in FIGS. 1 to 5 has a structure in which the pulp extracting means is provided with a pulp weir, the adjusting means for adjusting the flow rate of the liquid ejected from the ejection pipe is provided, the pulverizing tank is provided, and the pulp taken out from the circulation separation tank is provided. This is an example of a circulating separation device for recycling used paper diapers in which a liquid and a polymer-absorbing polymer liquid are separated from a liquid component by a screen.
FIG. 1 is an explanatory view of a circulating separation tank of a circulating separation device for recycling used paper diapers of an embodiment. FIG. 2 is an explanatory diagram of a circulating separation tank of the circulating separation device for recycling used paper diapers of the embodiment. FIG. 3 is an explanatory view of a circulating separation apparatus for recycling used paper diapers according to the embodiment. FIG.
FIG. 2 is an explanatory diagram of a processing facility using a circulating separation device for recycling used paper diapers of an embodiment. FIG. 5 is a process explanatory view of a processing facility using a circulating separation device for recycling used paper diapers of the embodiment. In the figure, 1 is a circulation separation device, 2 is a circulation separation tank, 3 is a disperser, 4 is a vinyl scraper used as scraping means for scraping vinyl, 4
a is an arm, 4b is a scraping plate, 4c is a vinyl box, 4d is a motor, 4e is a drive shaft, 5 is an ejection pipe, 5a
Is a jet port, 6 is a water level adjuster also serving as a pulp take-out means, 6a is a pulp weir, 6b is a pulp take-out pipe, 7 is a polymer absorbent polymer take-out pipe, 10 is a crushing tank, 11 is a stirrer, 1
2 is an air ejection pipe, 13 is a pump, 16 is a measuring tank used as a means for adjusting the flow velocity and speed blown from the ejection pipe, 28
Is a preliminary cleaning device, 29 is a dehydration press machine, 30 is a separation tank,
31 is a disinfection tank, 32 is a dehydrator, 35a and 35b are storage tanks, 36a and 36b are screens, 37a and 37b are dehydrators, 38a and 38b are containers, 39 is a loading truck, 40 is a conveyor, and 41 is an unloading truck. b is vinyl, m is a polymer-absorbing polymer, p is pulp, and s is a disposable diaper.

The circulating separation apparatus 1 of this embodiment is used for processing equipment for reusing paper diapers. As shown in FIG. 1, the circulation separation tank 2 of the circulation separation apparatus 1 has a shape in which the width of the inside of the tank gradually decreases from a predetermined depth position toward a bottom surface and downward. Circulation separation tank 2
Is provided so that a jet pipe 5 for sending the processing liquid from the outside is protruded into the tank. The ejection port 5a of the ejection pipe 5 is provided so as to blow upward from the center of the circulation separation tank 2 at a predetermined depth. Next, the disperser 3 is provided above the ejection port 5a. The disperser 3 is provided so that the diameter becomes smaller as it goes downward. A rotatable drive shaft 4e is provided above the disperser 3, and a drive shaft 4e is provided above the drive shaft 4e.
Is provided with a motor 4d for rotating the drive. Next, an arm 4a extending from the drive shaft 4e to the inner wall of the circulation separation tank 2
Are provided at two positions facing each other by 180 ° so that the rotation of the drive shaft 4e rotates the arm 4a. Next, it extends downward from the arm 4a on the outer peripheral side of the disperser 3 to a predetermined position,
A long scraping plate 4b is provided along the arm 4a. Next, as shown by 1 and 2 in the figure, a substantially bag-shaped vinyl box 4c having a narrow width and extending from near the disperser 3 to near the inner wall of the circulation separation tank 2 and opening upward is provided. The upper end of the vinyl box 4c is slightly lower than the surface of the treated water stored in the circulation separation tank 2, and the lower end of the scraping plate 4b is slightly above the upper end of the vinyl box 4c. To Thus, the arm 4a rotated by the drive of the motor 4d, the scraping plate 4
(b) The vinyl scraper 4 is constituted by the vinyl box 4c.

Next, a pulp take-out pipe 6b for taking out a liquid from a predetermined position in the upper part of the circulation separation tank 2 is provided, and a water level adjuster 6 is provided at an upper part of the outer periphery of the circulation separation tank 2. Water level adjuster 6
The pulp weir 6a is provided so that the upper end is located at the same height as the predetermined water level position of the circulation separation tank 2, and the pulp weir 6a is provided so as to send the liquid that has passed through the pulp weir 6a to the outside. Next, a polymer-absorbing polymer take-out pipe 7 is provided so that the liquid can be taken out from near the bottom of the circulation separation tank 2.

Next, a crushing tank 10 for treating the liquid to be sent to the circulation separation tank 2 is provided. As shown in FIG.
A stirrer 11 that stirs the liquid to be processed in the tank with a stirrer, and an air jet pipe 1 that jets air from the lower part of the tank.
2 is provided, and a pump 13 for sending the liquid to the outside from the lower part in the tank is provided. Next, a measuring tank 16 is provided at the destination of the pump 13. The measuring tank 16 allows the liquid to flow by its own weight in a predetermined flow path from a predetermined upper position so that a predetermined flow rate of the liquid is sent to the ejection pipe 5.

In this embodiment, used paper diapers are separated and collected by vinyl, pulp and polymer absorption pumps by the processing equipment shown in FIGS. The used disposable diaper is transported into the facility by the carry-in truck 39, and is firstly subjected to preliminary washing by the preliminary washing device 28, and then cut into an appropriate size by the dewatering press machine 29. Next, the cut disposable diapers are put into the separation tank 30 together with the dehydrating material for the high molecular absorption polymer. Separation tank 30
In the diaper s put into the pooled water, the separated diapers are stirred and washed, and the polymer absorption pump is dehydrated with a waterproofing agent for the polymer absorption polymer, mixed with water, and stirred. Separate the polymer absorption pump and pulp that settles the vinyl b having a low specific gravity, and collect the vinyl b floating on the water by scraping it. The collected vinyl is disinfected in a disinfection tank 31, dehydrated by a dehydrator 32, and carried out by a carry-out truck 41. The water in which the polymer-absorbing polymer m and the pulp p mixed together in which the vinyl has been separated in the separation tank 30 is sent to the crushing tank 10. In the crushing tank 10, the high-molecular-absorbing polymer m and the pulp p in the liquid are stirred and crushed by the air jetted from the stirrer 11 and the air jet pipe 12 to release the entangled state. This ensures that the polymer-absorbing polymer m and the pulp p can be more reliably separated. The liquid thus treated is sent to a measuring tank 16 located above by a pump 13 in the pulverizing tank 10. By positioning the measuring tank 16 above the water surface of the circulation separation tank 2, the liquid is sent to the ejection pipe 5 stably at a predetermined flow rate by the weight of the liquid.

The liquid sent from the measuring tank 16 is spouted upward from a spout 5a in the circulation separation tank 2, as shown in FIGS. Fine vinyl may be present in the ejected liquid. Since vinyl has a low specific gravity, it floats above the surface of the circulation separation tank. The floating vinyl b is scraped off by the scraping plate 4b rotated by the drive of the motor 4d and rotates together. As shown in FIG. 2, a vinyl box 4c is provided near the water surface of the circulation separation tank so as to open upward, so that the scraped vinyl falls and is stored in the vinyl box 4c. Since the main vinyl b of the disposable diaper is collected in the separation tank 30, the vinyl collected in the vinyl box 4c is fine, so it is sufficient to collect the vinyl in the vinyl box 4c after a certain timing. It is. On the other hand, since the polymer absorbing polymer m contained in the liquid ejected upward from the ejection port 5a has a high specific gravity,
It will sink before it rises near the surface. Since the circulation / separation tank 2 has a shape in which the lower part of the inside gradually narrows downward, the polymer-absorbing polymer m gathers at the center while settling. The pulp p contained in the liquid ejected upward from the ejection port 5a is:
Since the specific gravity is heavier than vinyl and lighter than the polymer absorbing polymer m, the upward flow causes the upper part of the circulation separation tank 2 to drift. Furthermore, in this embodiment, the measuring tank 1
By adjusting the flow rate of the liquid sent from 6, the pulp p is blown upward from the jet port 5a at the same or slightly higher speed as the sedimentation speed of the pulp p, so that the pulp p is surely floated on the upper part. . A pulp solution containing only pulp p is sent to the water level adjuster 6 from the depth position where only the pulp p is separated and floated by the pulp take-out pipe 6b with a pressure difference due to a height difference. The water level adjuster 6 has a circulation separation tank 2 at the upper end.
Is provided with the pulp weir 6a having the same height as that of the pulp weir 6a. It becomes pulp liquor. If the pulp liquid is taken out in this way, the pulp separated from the fine vinyl or polymer-absorbing polymer can be taken out without fail, and can be reused as high-grade pulp.

Further, in this circulation separation tank, a difference in specific gravity and sedimentation speed is used, so that a special space-saving and energy-saving device can be achieved without requiring special driving. The pulp liquid thus taken out is collected by a screen 36a, dehydrated by a dehydrator 37a, and carried out by a container 38a. The liquid separated by the screen 36a is collected in a container and reused, and is efficiently used with less drainage. The polymer-absorbing polymer liquid taken out by the polymer-absorbing polymer outlet pipe 7 is recovered by the screen 36b,
The water is dehydrated in 7b and carried out in the container 38b. The liquid separated by the screen 36b is collected and reused in a container, and is efficiently used with less drainage. The pulp recovered in this way can be reused as high-grade recycled pulp, and the recovered polymer-absorbing polymer can be reused as a soil moisture-retaining material, making it a very good environment for disposable diapers and highly reusable resources. Will be reused equipment.

[0014]

According to the present invention, used diapers can be reused so that pulp, polymer-absorbing polymer and fine vinyl can be surely separated and recovered as high-quality recycled pulp. When the pulp removing means has a structure in which a pulp weir is provided, a pulp solution containing only a large amount of pulp can be continuously taken out, so that efficient and continuous treatment can be performed. The one provided with the adjusting means for adjusting the flow rate of the liquid ejected from the ejection pipe and the one provided with the adjusting means for adjusting the speed of the liquid ejected from the ejection pipe can surely separate pulp, polymer-absorbing polymer and fine vinyl. To The one provided with a pulverizing tank ensures the separation of pulp, high-absorbing polymer and fine vinyl more reliably. A pulp liquid and a polymer-absorbing polymer liquid taken out of the circulation separation tank are separated from the liquid component by a screen, and can be treated efficiently with little drainage.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a circulation separation tank of a circulation separation device for recycling used paper diapers of an embodiment.

FIG. 2 is an explanatory view of a circulating separation tank of the circulating separation device for remedy of a used disposable diaper according to the embodiment.

FIG. 3 is an explanatory diagram of a circulating separation device for recycling used paper diapers according to the embodiment.

FIG. 4 is an explanatory diagram of a processing facility using a circulating separation device for recycling used paper diapers of an embodiment.

FIG. 5 is a process explanatory view of processing equipment using a circulating separation device for recycling used paper diapers according to the embodiment.

[Explanation of symbols]

 Reference Signs List 1 circulation separation device 2 circulation separation tank 3 disperser 4 vinyl scraper 4a arm 4b scraping plate 4c vinyl box 4d motor 4e drive shaft 5 ejection pipe 5a ejection port 6 water level adjuster 6a pulp weir 6b pulp extraction pipe 7 polymer Absorbing polymer take-out tube 10 Crushing tank 11 Stirrer 12 Air ejection tube 13 Pump 16 Measuring tank 28 Pre-cleaning device 29 Dehydration press machine 30 Separation tank 31 Disinfection tank 32 Dehydrator 35a Storage tank 35b Storage tank 36a Screen 36b Screen 37a Dehydrator 37b Dehydrator 38a Container 38b Container 39 Carry-in Truck 40 Conveyor 41 Carry-Out Truck b Vinyl m Polymer Absorbent Polymer p Pulp s Paper Diaper

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme Court ゛ (Reference) D21B 1/32 D21B 1/32 (72) Inventor Kenichi Koga 4-28-11 Atagohama, Nishi-ku, Fukuoka City, Fukuoka Prefecture (72) Inventor Kazuki Honda 1119-4-308 Shoin, Okubo-cho, Akashi-shi, Hyogo Prefecture BB03 BB13 CA01 CA05 DA15 4L055 AA20 CA09 CA40 FA20 GA35

Claims (6)

[Claims] A circulating separation tank for dividing a used disposable diaper and introducing a liquid containing a mixture of pulp, a polymer-absorbing polymer and a divided vinyl in the disposable diaper upward from a predetermined depth position. , A scraping means for scraping the floating vinyl is provided, an outlet for taking out the precipitated polymer-absorbing polymer is provided at the lower part of the circulation separation tank, and water containing pulp is taken out from the upper part of the circulation separation tank. A circulating separation device for recycling used paper diapers provided with a pulp take-out means so that the pulp and the polymer-absorbing polymer can be separated and recovered based on the specific gravity of the pulp and the polymer-absorbing polymer or the difference in sedimentation velocity in the liquid. . 2. The disposable disposable diaper according to claim 1, wherein the pulp removing means has a structure in which a pulp weir having a predetermined height is provided in the circulation separation tank, and a liquid containing a large amount of pulp that has passed through the pulp weir is sent to the outside. Circulation separator for reuse. 3. The circulating / separating apparatus for reusing a used paper diaper according to claim 1, further comprising adjusting means for adjusting a flow rate of a liquid blown out from the jet pipe. 4. An adjusting means for adjusting the velocity of the pulp / polymer-absorbing polymer liquid ejected from the ejection pipe so as to be equal to or slightly higher than the sedimentation rate of the polymer.
A circulating separation device for reusing a used disposable diaper according to any one of claims 1 to 3. 5. A crushing tank for temporarily storing a liquid in which pulp, a polymer-absorbing polymer, and vinyl are mixed before being sent to a circulating separation tank, and a stirring means for stirring the inside of the crushing tank is provided. The circulating separation device for reusing used paper diapers according to any one of claims 1 to 4, wherein the entanglement of the high-polymer absorbing polymer vinyl is released, and the crushed fine particles can be sent to the circulating separation tank. . 6. The used waste according to claim 1, wherein the pulp liquid and the polymer-absorbing polymer liquid taken out of the circulation separation tank are separated from the liquid by a screen, and the separated liquid can be reused. A circulating separation device for the reuse of disposable diapers.