JP2020131178A - Pulp collection device - Google Patents

Abstract

To provide a pulp collection device capable of collecting a pulp included in waste water from the waste water in a state in which a used sanitary article is decomposed into a plurality of kinds of materials by decomposition water, by a simplified facility and reducing cost for collection of a pulp.SOLUTION: There is provided a pulp collection device 23 for collecting a pulp 24 from waste water in a state in which a used sanitary article 6 is decomposed into a plurality of kinds of materials by decomposition water, the device comprising: a housing 25; a drum screen 26 which is arranged in the housing 25 in a rotation state and separates the waste water introduced from one side into a moisture and the pulp 24, and in which the pulp 24 is moved toward the other side and the pulp 24 separated from the moisture is collected from the other side; a drive mechanism 27 for driving the drum screen 26 so as to rotate; a rinse water injection part 29 for injecting rinse water 28 to the pulp 24 separated from the moisture in the drum screen 26; and a water reception tank 30 being provided on a lower part side of the drum screen 26 in the housing 25 for receiving the moisture separated from the pulp and the rinse water 28.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pulp recovery device that decomposes used sanitary goods into a plurality of types of materials and recovers pulp from wastewater in a state where pulp is dissolved.

In recent years, paper diapers (paper diapers) have been used as disposable diapers as hygiene products in hospitals and nursing homes. This disposable diaper is composed of an absorber made of pulp or the like, a polymer absorber (high molecular polymer) that retains the water absorbed by the absorber, and a material such as a waterproof material (plastic) that wraps the absorber. In addition, the urine leakage pad or the like is also composed of an absorber made of pulp or the like, a polymer absorber (high molecular polymer) that retains the water absorbed by the absorber, and a material such as a waterproof material (plastic) that wraps them. There is. These used sanitary products such as disposable diapers and urine leak pads after use are currently treated (disposed) as general waste.

Sanitary products such as these used disposable diapers and urine leak pads can be used as general waste as they are, for example, if they are incinerated, harmful substances may be generated, and if they are landfilled, the soil may be deteriorated by infectious substances.

Therefore, from the viewpoint of hygiene and environment, patent documents 1, 2 and 3 have proposed a used disposable diaper processing device that disassembles and processes used disposable diapers as sanitary products for each material. In the used disposable diaper processing apparatus proposed in Documents 1, 2 and 3, the used disposable diaper is decomposed into pulp, polymer polymer, and plastic material by mixing it with the processing liquid in a rotating drum. are doing.

In the above-mentioned used paper diaper processing apparatus, when separating and disassembling into pulp, polymer polymer, and plastic, filth, polymer polymer, and pulp are scattered in the treatment liquid while leaving the plastic in the drum, and this treatment is performed. By filtering the liquid, the pulp and the high molecular polymer are left, and the treatment liquid containing filth is discharged to the sewage treatment facility side. However, a large amount of pulp remains in the treatment liquid after disinfection containing filth.

Patent Document 4 proposes a pulp recovery device that recovers a large amount of pulp remaining in the treatment liquid after separating and disassembling used disposable diapers. This pulp recovery device separates used paper diapers that have been cut or crushed into vinyl and other undiluted solutions (pulp dissolution solutions) using a reaction tank and a dissolution separator. Next, the polymer is removed from the pulp lysate using a polymer removing device, and the foreign matter is removed from the pulp lysate from which the polymer has been removed by a foreign matter removing device. The pulp lysate from which foreign substances have been removed is washed using a pulp washing tank, and the washed pulp lysate is dehydrated by a molding dryer to be molded and dried to recover the pulp.

Japanese Patent No. 3895081 Japanese Patent No. 3597492 Japanese Patent No. 3569260 Japanese Unexamined Patent Publication No. 2013-132600

However, in the above pulp recovery device, in order to recover the pulp from the pulp solution separated from the vinyl contained in the used disposable diaper, each process is performed using a polymer removing device, a foreign matter removing device, a pulp washing tank, and a molding dryer. There is a need to. For this reason, the equipment for recovering pulp from used disposable diapers becomes large-scale, and it takes time and effort to recover pulp.

In addition, since the equipment for recovering pulp becomes large-scale, the cost for recovering pulp also increases.

Therefore, according to the present invention, the pulp contained in the wastewater can be recovered from the wastewater in which the used sanitary goods are decomposed into a plurality of kinds of materials by decomposed water by a simple facility, and the pulp can be recovered. It is an object of the present invention to provide a pulp recovery device capable of reducing the cost of

One aspect of the present invention for solving the above problems is a pulp recovery device that recovers pulp from wastewater in a state where used sanitary goods are decomposed into a plurality of kinds of materials with decomposed water, and includes a box body and the above. A drum that is arranged in a rotating state inside the box and separates the wastewater introduced from one side into water and pulp, moves the pulp toward the other side, and collects the pulp separated from water from the other side. A screen, a drive mechanism for rotating and driving the drum screen, a rinsing liquid injection unit for injecting rinsing liquid onto pulp separated from drainage in the drum screen, and a rinsing liquid injection unit provided on the lower side of the drum screen in the box. It is characterized by comprising a water receiving tank for receiving the water separated from the pulp and the rinsing liquid.

Further, in one aspect of the present invention, the box body covers the front plate portion facing one side of the drum screen, the rear plate portion facing the other side of the drum screen, and the upper portion of the drum screen. It is formed of a plate portion and a pair of side plate portions that cover both side portions of the drum screen and face each other, and the front plate portion is provided with a drainage introduction port for introducing the drainage to one side of the drum screen. The rear plate portion is provided with a pulp recovery port for collecting pulp separated from water from the other side of the drum screen.

Further, in one aspect of the present invention, the drum screen has a cylindrical main body that is cylindrical and has a plurality of slits formed on the outer periphery to be rotatable, and the tubular main body is provided on one side in the axial direction to drain water. It is composed of an introduction port side end face to be introduced and a collection port side end face provided on the other side in the axial direction of the tubular body from which the pulp is collected, and the tubular body is said from the introduction port side end face. It is characterized in that it is arranged so as to be inclined with respect to the horizontal so that the end face on the collection port side is located downward.

Further, in one aspect of the present invention, the drive mechanism is arranged parallel to the front plate portion and the rear plate portion of the box body on the lower side of the drum screen along the axial direction of the drum screen. A pair of drive shafts whose both ends are rotatably supported by the front plate portion and the rear plate portion, and the drums fixed to the front plate portion side and the rear plate portion side of these drive shafts, respectively. A roller that comes into contact with the outer periphery of the screen and supports the drum screen, a motor that is arranged outside the front plate portion and is fixed to the front plate portion to transmit a rotational driving force to the one drive shaft, and one of the above. It is formed by a drive transmission unit that transmits the rotational driving force of the motor transmitted to the drive shaft to the other drive shaft, and the drive transmission unit is a tip that penetrates the front plate portion of the pair of drive shafts. Formed by a sprocket fixed to each portion and a roller chain wound around the sprocket and transmitting the rotational driving force of the motor transmitted to one drive shaft to the other drive shaft via the sprocket. It is characterized by being done.

Further, in one aspect of the present invention, the rinsing liquid injection portion is arranged on the upper part of the tubular main body along the axial direction of the tubular main body, and the rinsing liquid supply formed along the axial direction of the tubular main body. It is characterized by comprising a pipe and an injection nozzle provided in the rinsing liquid supply pipe and injecting a rinsing liquid toward the pulp in the tubular body to rinse and wash the pulp.

According to the present invention, the pulp in the wastewater is separated from the water in the rotating drum screen and moves from one side to the other. Therefore, the used sanitary goods are decomposed into a plurality of kinds of materials by decomposing water. The pulp contained in the wastewater can be recovered from the decomposed wastewater by a simple facility, and the cost for recovering the pulp can be reduced.

The inside view which shows the pulp recovery apparatus which concerns on embodiment of this invention. The schematic block diagram which shows the separator of the used disposable diaper which discharges the wastewater containing pulp to the pulp recovery apparatus which concerns on embodiment of this invention. The pulp recovery apparatus which concerns on embodiment of this invention is shown, and the left side view of FIG. The right side view of FIG. 1 shows the pulp recovery apparatus which concerns on embodiment of this invention. FIG. 1 is a plan view showing a pulp recovery device according to an embodiment of the present invention. FIG. 5 is an enlarged cross-sectional view of a part of the drum screen of the pulp recovery device according to the embodiment of the present invention.

Hereinafter, embodiments of the pulp recovery device according to the present invention will be described. The pulp recovery device in the present embodiment decomposes used disposable diapers as used sanitary goods into a plurality of types of materials by water and decomposed water in a separator, and discharges water and decomposed water from the wastewater. , The pulp contained in this wastewater is collected.

Further, the used disposable diaper containing the pulp recovered by the pulp recovery device of the present embodiment is composed of a surface material, a three-dimensional gather for preventing leakage, a water absorbing material, a waterproof material, and the like. As the surface material, a non-woven fabric of polyester or polypropylene is used. Non-woven fabric and elastic material are used for the leak-proof three-dimensional gathers. The water-absorbent material is composed of a combination of water-absorbent paper, cotton-like pulp, polymer absorbent and the like. The waterproof material is a waterproof sheet that covers the outside of the disposable diaper, and a non-woven fabric made of synthetic fibers or the like is used.

In addition, adhesive tapes and fasteners for holding disposable diapers are used. In the present embodiment, the material means a polymer absorber of a disposable diaper, a surface material, a plastic used for three-dimensional gathers, pulp used for water-absorbing paper, adhesive tape, rubber, and the like. ..

Further, in the present embodiment, the decomposed water for decomposing used disposable diapers together with water in the separator is a mixture of lime as a decomposing agent, hypochlorous acid as a disinfecting agent, and water, and is treated. The amount of lime, hypochlorous acid, and water to be mixed is set according to the type of used disposable diaper to be processed and the amount of used disposable diaper to be processed. Further, if necessary, a cleaning agent, a bleaching agent, or the like may be added.

A mixture of lime and water may be used as the decomposed water, and hypochlorous acid as the disinfectant may be supplied to the treatment apparatus separately from the decomposed water in which lime and water are mixed. In the present embodiment, the decomposed water is a mixture of lime as a decomposing agent, water, and hypochlorous acid as a disinfectant.

Hereinafter, the pulp recovery device of the present embodiment and the separator that decomposes the pulp recovered by the pulp recovery device from the used disposable diapers will be described with reference to the drawings. First, a separator that decomposes used disposable diapers into a plurality of materials constituting the disposable diapers with water and decomposed water will be described. The pulp recovery device recovers the pulp contained in the wastewater after being decomposed by this separator.

〔Separator〕
As shown in FIG. 2, the separator 1 is composed of a housing 2, an outer body separation tank 3, an inner body separation tank 4, and a decomposition water supply unit 5. The outer body separation tank 3 is fixed to the housing 2. The inner body separation tank 4 is rotatably arranged in the outer body separation tank 3. The decomposed water supply unit 5 supplies the decomposed water 7 to the used disposable diapers 6 in the inner body separation tank 4.

The housing 2 has a box shape and is provided with a circular input / outlet 8 on the front side. From the loading / unloading port 8, the used paper diaper 6 is charged into the inner body separation tank 4, and after the used paper diaper 6 is disassembled (disassembled), the solid matter remaining in the inner body separation tank 4 is left. Taken out. A circular loading / unloading door 9 is rotatably provided at the loading / unloading port 8. The outer body separation tank 3 is fixed inside the housing 2.

The outer body separation tank 3 has a cylindrical shape, and an opening 10 communicating with the loading / unloading port 8 of the housing 2 is formed on one end surface, and the other end surface is closed. Therefore, in the state where the loading / unloading door 9 closes the loading / unloading outlet 8, the inside of the outer body separation tank 3 is sealed. The inner body separation tank 4 is rotatably arranged in the outer body separation tank 3.

The inner body separation tank 4 has a cylindrical shape with an inner diameter smaller than the inner diameter of the outer body separation tank 3, and small-diameter holes are formed on the entire outer peripheral surface (side surface) by punching or the like. One end surface side of the inner body separation tank 4 is located on the front surface side of the housing 2, and the other end surface is located on the rear surface side of the housing 2. On one end surface side, an opening 11 that communicates with the inlet / outlet 8 of the housing 2 is formed. The rotation drive shaft 12 projects from the other end face. A rotational driving force from a drive motor (not shown) is transmitted to the rotary drive shaft 12, and the inner body separation tank 4 is rotationally driven. The used paper diaper 6 is put into the inner body separation tank 4, and the decomposed water is supplied by the decomposed water supply unit 5.

The decomposition water supply unit 5 includes a decomposition agent tank 13, a detergent tank 14, a decomposition water supply port 15, a supply pump 16, and pipelines 17 and 18. The decomposition agent tank 13 stores the decomposition water 7 in which the decomposition agent, water, and the disinfectant are mixed in a predetermined ratio. The supply pump 16 sends the decomposed water 7 in which the decomposition agent, water, and the disinfectant are mixed to the decomposition water supply port 15 that supplies the decomposition water 7 into the inner body separation tank 4.

Then, the inner body separation tank 4 is rotationally driven in a state where the decomposed water 7 is poured from the upper part of the used paper diaper 6, and the decomposed water 7 supplied causes the used paper diaper 6 to have a plurality of types. The material of the above and the filth (sewage) absorbed in the used disposable diaper 6 are separated. In this case, the decomposed water is evenly immersed (permeated) in the used disposable diaper 6, and the used disposable diaper 6 is separated into a plurality of types of materials and filth (sewage).

Solid matter (pulp and plastic not dissolved in the decomposed water) remaining in the inner body separation tank 4 remains in the inner body separation tank 4, and pulp and filth (sewage) dissolved in the decomposed water are discharged to the discharge unit 19. To. The discharge unit 19 sends the drainage receiving tank 20 from which the decomposed water in the outer body separation tank 3 is discharged, the drainage pit 21 that filters and temporarily stores the drainage, and the drainage pit 21 to the pulp recovery device 23. It is formed by the pump 22. Pulp is dissolved and contained in the drainage sent from the drainage pit 21 to the pulp recovery device 23, and the pulp in the drainage is recovered by the pulp recovery device 23.

As shown in FIGS. 1, 3, 4, and 5, the pulp recovery device 23 of the present embodiment removes the pulp 24 from the wastewater in which the used paper diaper 6 is decomposed into a plurality of kinds of materials with decomposed water. to recover. The pulp recovery device 23 is arranged in a rotating state in the housing 25 and the housing 25, separates the wastewater introduced from one side into the water and the pulp 24, and moves the pulp 24 toward the other side. The drum screen 26 in which the pulp 24 separated from the water is collected from the side, the drive mechanism 27 for rotating and driving the drum screen 26, and the rinsing liquid 28 in the pulp 24 separated from the water in the drainage in the drum screen 26. It is provided with a rinsing liquid injection unit 29 for injecting water and a water receiving tank 30 provided on the lower side of the drum screen 26 in the housing 25 to receive the water separated from the drainage and the rinsing liquid 28.

The housing 25 is formed of a front plate portion 31, a rear plate portion 32, an upper plate portion 33, and a pair of side plate portions 34, 34. The front plate portion 31 faces one side 35 of the drum screen 26. The rear plate portion 32 faces the other side 36 of the drum screen 26. The upper plate portion 33 covers the upper portion of the drum screen 26. The pair of side plate portions 34, 34 are arranged to face each other so as to cover both side portions of the drum screen 26. Further, the front plate portion 31 and the rear plate portion 32 are inclined with respect to the installation surface 37 on the other side 36, that is, the side on which the pulp 24 is collected.

Further, on the lower side of the front plate portion 31 and the rear plate portion 32, fixing portions 38, 38 fixed to the installation surface 37 are provided. Further, the front plate portion 31 is provided with a drainage introduction port 39 for introducing drainage to one side 35 of the drum screen 26. Further, the rear plate portion 32 is provided with a pulp recovery port 40 in which the pulp 24 separated from water is recovered from the other side 36 of the drum screen 26.

The drum screen 26 is formed of a tubular main body 42, an introduction port side end surface 43, and a collection port side end surface 44. The tubular main body 42 is cylindrical and has a plurality of slits 41 formed on the outer periphery thereof so as to be rotatable. The introduction port side end surface 43 is provided on one side of the tubular main body 42 in the axial direction, and drainage is introduced into the tubular main body 42. The collection port side end surface 44 is provided on the other side of the tubular main body 42 in the axial direction, and the pulp 24 is collected. Further, the tubular main body 42 is provided so as to be inclined so that the collection port side end surface 44 is located below the introduction port side end surface 43.

As shown in FIG. 6, the tubular main body 42 is formed in a tubular shape by fixing a plurality of ring-shaped wedge wires 45 in multiple stages with a plurality of support rods 46. Slits 41 are formed between the wedge wires 45, respectively. Further, the tubular main body 42 is provided with rotating rings 47 and 47 on both ends in the axial direction, respectively. The rotating rings 47 and 47 are provided with grooves 48 into which the rollers 51 of the drive mechanism 27 are inserted in the entire circumferential direction.

A drainage introduction pipe 49 is provided on one side of the tubular main body 42. The drainage introduction pipe 49 penetrates the introduction port side end surface 43 of the tubular main body 42 and projects into the tubular main body 42. The drainage introduction pipe 49 projecting into the tubular main body 42 is inclined at the same angle as the inclination of the tubular main body 42, that is, so that the tip side is located downward. Further, the tip end side of the drainage introduction pipe 49 is opened downward. Then, the drainage sent from the drainage pit 21 is introduced into the tubular main body 42 by the drainage introduction pipe 49. The tubular main body 42 in which the drainage is introduced by the drainage introduction pipe 49 is rotated by the drive mechanism 27, and the drainage is separated into water and pulp. That is, water is discharged from the slit 41 of the tubular main body 42, and the pulp 24 that could not pass through the slit 41 remains in the tubular main body 42.

The drive mechanism 27 is composed of a pair of drive shafts 50, 50, rollers 51, 51, a motor 52, and a drive transmission unit 53. The pair of drive shafts 50, 50 are arranged parallel to the front plate portion 31 and the rear plate portion 32 on the lower side of the drum screen 26 along the axial direction of the drum screen 26. Further, both ends of the pair of drive shafts 50, 50 are rotatably supported by the front plate portion 31 and the rear plate portion 32, respectively. The rollers 51, 51 are fixed to the front plate portion 31 side and the rear plate portion 32 side of the pair of drive shafts 50, 50, respectively, and abut on the outer periphery of the tubular main body 42 to support the drum screen 26. The motor 52 is arranged outside the front plate portion 31 and fixed to the front plate portion 31, and rotationally drives one of the drive shafts 50. The drive transmission unit 53 transmits the rotational driving force of the motor 52 transmitted to one drive shaft 50 to the other drive shaft 50. The motor 52 is provided with a gearbox integrally with the motor body, and the output shaft from the gearbox is orthogonal to the drive shaft of the motor body.

The drive transmission unit 53 is wound between the sprockets 54 and 54 fixed to the tip portions penetrating the front plate portions 31 of the pair of drive shafts 50 and 50, respectively, and one of the drive shafts 50. It is formed by a roller chain 56 that transmits the rotational driving force of the motor 52 transmitted to the other drive shaft 50 via the sprockets 54 and 54.

Then, when drainage is introduced from the drainage introduction pipe 49 into the drum screen 26 which is rotated by the rotational driving force of the drive mechanism 27, the water is discharged from the slit 41 of the tubular main body 42 and into the tubular main body 42. Pulp (pulp that did not pass through the slit 41) 24 remains as a solid substance. In this case, since the drum screen 26 is inclined toward the end surface 44 on the recovery port side, the pulp 24 remaining in the tubular main body 42 gradually moves to the pulp recovery port 40 side. The rinsing liquid 28 is sprayed from above by the rinsing liquid injection unit 29 onto the pulp 24 moving to the pulp recovery port 40 side.

The rinse liquid injection unit 29 includes a rinse liquid supply pipe 57 and a plurality of injection nozzles 58 provided in the rinse liquid supply pipe 57. As shown in FIGS. 4 and 5, the rinsing liquid supply pipes 57 are arranged on both sides of the upper portion of the tubular main body 42 along the axial direction of the tubular main body 42, respectively. A plurality of injection nozzles 58 are provided in these rinse liquid supply pipes 57 at predetermined intervals. These injection nozzles 58 diffuse and inject the rinsing liquid 28 toward the pulp 24 in the tubular main body 42 in a fan shape. The rinse liquid 28 ejected from the injection nozzle 58 is not limited to water, and may be disinfectant water.

Then, the rinsing liquid 28 is sprayed from the injection nozzle 58 of the rinsing liquid injection unit 29 onto the pulp 24 that moves to the pulp recovery port 40 side while being separated from the water in the drum screen 26, and the rinsing is performed. In this case, the rinsing liquid 28 is discharged from the slit 41 into the water receiving tank 30 together with the decomposed water after rinsing the pulp 24.

The water receiving tank 30 is arranged at the lower part of the drum screen 26. The water receiving tank 30 has a wide upper receiving port 59 that opens to the lower part of the drum screen 26, a storage tank 60 provided on the installation surface 37 side, and drainage provided on the rear plate portion 32 side of the bottom of the storage tank 60. It is formed by the mouth 61. The water receiving tank 30 is also inclined at the same angle (approximately 5 degrees) as the drum screen 26, and the decomposed water separated from the drainage and the rinse liquid 28 ejected from the rinse liquid injection unit 29 are combined with the rear plate portion 32. It is designed to be stored on the side, that is, on the drain port 61 side on the pulp recovery port 40 side.

Next, a recovery procedure for recovering pulp from the used disposable diaper 6 will be described. The wastewater introduced into the pulp recovery device 23 is generated by decomposing the used disposable diaper 6 by the separator 1. In order to disassemble the used paper diaper 6 by the separator 1, the used paper diaper 6 is put into the inner body separation tank 4, the inner body separation tank 4 is rotated at a predetermined rotation speed, and the supply pump 16 is used in this state. The decomposed water is supplied into the inner body separation tank 4 from the decomposed water supply port 15. At the same time, the detergent is supplied into the inner body separation tank 4.

When the decomposed water is supplied into the inner body separating tank 4 while rotating the inner body separating tank 4, the decomposed water permeates into the used disposable diaper 6. As a result, the used disposable diaper 6 is separated into pulp, plastic, and the like. At the same time, the polymer polymer is decomposed by water and lime in the decomposed water, and filth (sewage) such as urine absorbed by the polymer polymer becomes water and comes out into the inner body separation tank 4.

Therefore, the used disposable diaper 6 is separated into pulp, urine and other filth (moisture), plastic, and the like dissolved in the decomposed water. Decomposed water containing pulp and filth (sewage) is discharged to the drainage pit 21 of the discharge unit 19 and temporarily stored. Pulp, plastic, and other materials that have not been dissolved in the decomposed water remain as solids in the inner body separation tank 4. Pulp, plastic, and other materials that have not been dissolved in the decomposed water are taken out from the inner body separation tank 4, sorted into pulp and plastic, collected, and reused.

Then, the decomposed water containing the pulp discharged from the separator 1 to the drainage pit 21 (hereinafter referred to as “drainage”) is sent to the pulp recovery device 23 by the pump 22. In the pulp recovery device 23, the drum screen 26 is rotated at a predetermined rotational speed by the rotational driving force of the motor 52. In the pulp recovery device 23 in this state, drainage is introduced into the drum screen 26 from the drainage introduction pipe 49. When the drainage is introduced into the drum screen 26, the rotation of the drum screen 26 causes water to fall from the slit 41 into the water receiving tank 30, leaving the pulp 24 separated from the water in the drum screen 26.

Since the pulp 24 remaining in the drum screen 26 is rotating in a state where the drum screen 26 is tilted, it moves to the pulp recovery port 40 side by its own weight. The rinsing liquid 28 is sprayed from the injection nozzle 58 onto the pulp 24 that has moved to the pulp recovery port 40 side. The rinse liquid 28 sprayed with the pulp 24 is dropped into the water receiving tank 30 after rinsing and washing the pulp. While rinsing with the rinsing liquid 28, the pulp 24 further moves to the pulp recovery port 40 side, and is finally taken out from the pulp recovery port 40 and recovered. In this case, the collected pulp 24 is continuously separated from the water from the wastewater, rinsed, and collected in a spiral shape by a drum screen 26 that rotates in a dehydrated state.

The decomposed water and the rinsing liquid 28 collected in the water receiving tank 30 are discharged to the outside from the drain port 61 when a certain amount is stored. In this case, the decomposed water and the rinsing liquid 28 discharged from the drain port 61 are discharged into the sewage after the water treatment.

As described above, in the pulp recovery device 23 of the present embodiment, the pulp contained in the wastewater can be recovered by the drum screen 26, so that the pulp 24 can be recovered by a simple facility. As a result, the cost for recovering the pulp 24 can be reduced.

Further, in the pulp recovery device 23 of the present embodiment, by tilting the drum screen 26, the pulp 24 separated from the water in the drum screen 26 moves to the pulp recovery port 40 side by its own weight, so that it is separated from the water. No means is required to move the pulp to the pulp recovery port 40 side, and the equipment becomes simpler accordingly.

Further, in the pulp recovery device 23 of the present embodiment, the wastewater is separated into the water and the pulp 24, and the pulp 24 separated from the water is rinsed by injecting the rinsing liquid by the rinsing liquid injection unit 29. Clean (good quality) pulp 24 can be obtained.

Further, in the pulp recovery device 23 of the present embodiment, two rows of rinse liquid supply pipes 57 are arranged above the drum screen 26, and a plurality of injection nozzles 58 are arranged in series with these rinse liquid supply pipes 57. Has been done. As a result, the water discharged from the injection nozzle 58 diffuses in a fan shape, and the rinsing liquid that has entered the tubular body 42 from the slit 41 of the tubular body 42 falls on the pulp 24, and the rinsing effect can be obtained. The rinse solution is not limited to fresh water, but may be disinfectant water.

As described above, embodiments of the present invention have been disclosed, but it will be apparent to those skilled in the art that modifications can be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

The used sanitary product processing device according to the present invention is used for processing sanitary products that absorb urine and other filth with a high polymer polymer, such as sanitary napkins and urine leak pads, in addition to processing used disposable diapers. It is also available for.

23 Pulp recovery device 24 Pulp 25 Housing 26 Drum screen 27 Drive mechanism 28 Rinse liquid 29 Rinse liquid injection part

One aspect of the present invention for solving the above problems is a pulp recovery device that recovers pulp from wastewater in a state where used sanitary goods are decomposed into a plurality of kinds of materials with decomposed water, and has a housing and the above. are arranged in a rotating state in a housing, pulp the pulp is separated from the moving water from the other side to the other side is recovered together with separating the wastewater introduced from one side to the water and pulp a drum screen, the drive mechanism for the drum screen is rotatably driven, the the rinse liquid injection unit that injects rinse the pulp to decompose the waste water in the drum screen is separated from the water, the drum within the housing The drum screen is provided with a water receiving tank provided on the lower side of the screen and receiving the water separated from the pulp and the rinsing liquid, and the drum screen is a cylindrical cylinder having a plurality of slits formed on the outer periphery to be rotatable. The shape body, the end face on the side of the introduction port provided on one side of the tubular body in the axial direction and into which the drainage is introduced, and the collection port provided on the other side of the tubular body in the axial direction from which the pulp is collected. The tubular main body is composed of a side end surface, and is characterized in that the tubular main body is arranged so as to be inclined with respect to the horizontal so that the collection port side end surface is located below the introduction port side end surface .

Further, in one aspect of the present invention, the housing covers the front plate portion facing one side of the drum screen, the rear plate portion facing the other side of the drum screen, and the upper portion of the drum screen. It is formed of a plate portion and a pair of side plate portions that cover both side portions of the drum screen and face each other, and the front plate portion is provided with a drainage introduction port for introducing the drainage to one side of the drum screen. The rear plate portion is provided with a pulp recovery port for collecting pulp separated from water from the other side of the drum screen.

Further, in one aspect of the present invention, the drive mechanism is arranged parallel to the front plate portion and the rear plate portion of the housing on the lower side of the drum screen along the axial direction of the drum screen. A pair of drive shafts whose both ends are rotatably supported by the front plate portion and the rear plate portion, respectively, and these pair of drive shafts are fixed to the front plate portion side and the rear plate portion side, respectively. A roller that comes into contact with the outer periphery of the drum screen and supports the drum screen, and a rotational driving force that is arranged outside the front plate portion and fixed to the front plate portion to one of the pair of drive shafts. Is formed by a motor that transmits the above and a drive transmission unit that transmits the rotational driving force of the motor transmitted to the one drive shaft to the other drive shaft of the pair of drive shafts .
The drive transmission unit includes a sprocket fixed to a tip portion of the pair of drive shafts penetrating the front plate portion, respectively.
It is wound around the sprocket, wherein the is one rotational driving force of the motor is transmitted to the drive shaft via the sprocket and roller chain is transmitted to the other drive shaft, in form ..

One aspect of the present invention for solving the above problems is a pulp recovery device that recovers pulp from wastewater in a state where used sanitary goods are decomposed into a plurality of kinds of materials with decomposed water, and has a housing and the above. A drum that is arranged in a rotating state in a housing and separates water and pulp from the wastewater introduced from one side, moves the pulp toward the other side, and collects the pulp separated from water from the other side. A screen, a drive mechanism for rotating and driving the drum screen, a rinse liquid injection unit for injecting a rinse liquid onto pulp separated from water from drainage in the drum screen, and a lower side of the drum screen in the housing. The drum screen is provided with a water receiving tank which is provided in the water and receives the water separated from the pulp and the rinsing liquid, and the drum screen has a cylindrical main body which is cylindrical and has a plurality of slits formed on the outer periphery to be rotatable. An introduction port side end surface provided on one side of the tubular body in the axial direction and into which the drainage is introduced, and a collection port side end surface provided on the other side of the tubular body in the axial direction from which the pulp is collected. The tubular main body is characterized in that the tubular main body is arranged so as to be inclined with respect to the horizontal so that the end surface on the collection port side is located below the end surface on the introduction port side.

Claims (5)

A pulp recovery device (23) that recovers pulp (24) from wastewater in a state where used sanitary goods (6) are decomposed into a plurality of types of materials with decomposed water.
With the housing (25)
The wastewater introduced from one side is separated into water and pulp (24), and the pulp (24) moves toward the other side and is arranged in a rotating state in the housing (25). A drum screen (26) from which pulp (24) separated from water is collected, and
A drive mechanism (27) that rotationally drives the drum screen (26),
A rinse liquid injection unit (29) that injects the rinse liquid (28) onto the pulp (24) that decomposes wastewater and is separated from water in the drum screen (26).
It is provided with a water receiving tank (30) provided on the lower side of the drum screen (26) in the housing (25) and receiving the moisture separated from the pulp and the rinsing liquid (28). A featured pulp recovery device (23). The housing (25) includes a front plate portion (31) facing one side of the drum screen (26), a rear plate portion (32) facing the other side of the drum screen (26), and the drum. It is formed of an upper plate portion (33) that covers the upper part of the screen (26) and a pair of side plate portions (34) that cover both side portions of the drum screen (26) and face each other.
The front plate portion (31) is provided with a drainage introduction port (39) for introducing the drainage to one side of the drum screen (26), and the rear plate portion (32) is provided with pulp (32) separated from water. The pulp recovery device (23) according to claim 1, wherein the pulp recovery port (40) is provided so that the drum screen (26) is recovered from the other side of the drum screen (26). The drum screen (26) is provided on a cylindrical main body (42) which is cylindrical and has a plurality of slits (41) formed on the outer periphery thereof to be rotatable, and on one side of the tubular main body (42) in the axial direction. The end face (43) on the inlet side into which the drainage is introduced, and the end face (44) on the recovery port side provided on the other side in the axial direction of the tubular body (42) from which the pulp (24) is collected. Consists of
The tubular main body (42) is arranged so as to be inclined with respect to the horizontal so that the collection port side end surface (44) is located below the introduction port side end surface (43). The pulp recovery device (23) according to claim 1 or 2. The drive mechanism (27) has a front plate portion (31) and a rear plate portion (32) of the housing (25) on the lower side of the drum screen (26) along the axial direction of the drum screen (26). ), And a pair of drive shafts (50, 50) whose both ends are rotatably supported by the front plate portion (31) and the rear plate portion (32), respectively.
The pair of drive shafts (50, 50) are fixed to the front plate portion (31) side and the rear plate portion (32) side, respectively, and come into contact with the outer periphery of the drum screen (26), and the drum screen ( Rollers (51, 51) supporting 26) and
A motor that is arranged outside the front plate portion (31) and fixed to the front plate portion (31) to transmit rotational driving force to one of the pair of drive shafts (50, 50). (52) and
A drive transmission unit (53) that transmits the rotational driving force of the motor (52) transmitted to the one drive shaft (50) to the other drive shaft (50) of the pair of drive shafts (50, 50). And formed by
The drive transmission unit (53) includes sprockets (54, 54) fixed to the tip portions of the pair of drive shafts (50, 50) penetrating the front plate portion (31), respectively.
The rotational driving force of the motor (52) wound around the sprocket (54, 54) and transmitted to the one driving shaft (50) is transmitted to the other driving shaft (54, 54) via the sprocket (54, 54). The pulp recovery device (23) according to claim 2 or 3, wherein the roller chain (56) is formed of a roller chain (56) transmitted to the 50). The rinse liquid injection portion (29) is arranged on the upper part of the tubular main body (42) along the axial direction of the tubular main body (42), and is formed along the axial direction of the tubular main body (42). The rinsing liquid (27) is provided on the rinsing liquid supply pipe (57) and the rinsing liquid (28) is injected toward the pulp (24) in the tubular main body (42) to inject the pulp (24). The pulp recovery device (23) according to claim 3 or 4, further comprising an injection nozzle (58) for rinsing and cleaning.

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