Separator for used sanitary goods treatment equipment

Abstract

To provide a separator for a treatment device of a used sanitary article which efficiently disassembles a used sanitary article, and can shorten a treatment time.SOLUTION: A separator 3 for a treatment device of a used sanitary article includes an inner barrel separation tank 8 which is rotatably supported in an outer barrel separation tank 7 fixed to a housing 6, and rotates / stirs a charged used paper diaper 2 together with a treatment liquid 34, and separates the used paper diaper 2 into a plurality of kinds of constituent materials, wherein in the inner barrel separation tank 8, a scraping projection 10 for scraping the used sanitary article 2 to an upper side 36 above the vicinity of a liquid surface 9 of the treatment liquid 34 in at least the inner barrel separation tank 8 from a lower side 33 in the inner barrel separation tank 8, falling the used sanitary article 2 toward the lower side 33 from the upper side 36 in the inner barrel separation tank 8, and applying impact force to the used sanitary article 2 is provided on an inner wall 11 of the inner barrel separation tank 8.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a separator for a used sanitary product treating device that decomposes used sanitary products into materials that constitute the sanitary products while supplying a treating liquid in a rotating separating tank. [Background technology]

[0002] In recent years, urinary absorption pads and disposable paper diapers have become popular hygiene products. Paper diapers, which are hygiene products, are composed of an absorbent body made of pulp or other materials, a high-molecular-weight absorbent (high-molecular-weight polymer) that retains the moisture absorbed by the absorbent body, and a waterproof material (plastic) that encases these. Urinary absorption pads and other hygiene products are also composed of an absorbent body made of pulp, a high-molecular-weight absorbent (high-molecular-weight polymer) that retains the moisture absorbed by the absorbent body, and a waterproof material (plastic) that encases these. Currently, these hygiene products, such as used disposable diapers and urinary absorption pads, are treated (disposed of) as general waste.

[0003] However, if these used disposable diapers, urine absorption pads, and other sanitary products are disposed of as general waste, for example by incineration, harmful substances may be produced, and if they are disposed of in landfills, the soil may be polluted by infectious substances, etc.

[0004] Therefore, from a hygienic and environmental perspective, a sanitary product treatment device that breaks down and treats sanitary products into their respective materials is proposed in Patent Document 1. In the used disposable diaper treatment device proposed in Patent Document 1, used disposable diapers are mixed with a treatment liquid in a rotating drum, and are broken down into materials such as pulp, high molecular weight polymers, and plastics.

[0005] In the processing device described in Patent Document 1, used disposable diapers are placed in a rotating drum, and a predetermined amount of processing liquid of a predetermined concentration is supplied into a processing chamber. The used disposable diapers are immersed in the processing liquid inside the drum, and then the drum is rotated to disassemble the used disposable diapers into their respective materials. The disposable diapers that are disassembled by rotating the rotating drum include so-called tape-type diapers, which are unfolded and then attached to both sides of the body with tape after being worn, and pants-type diapers, which are pre-formed into pants like underwear. Inside the rotating drum, a mixture of tape-type and pants-type disposable diapers are immersed in the processing liquid and disassembled.

[0006] In addition, in the processing device described in Patent Document 1, a plurality of stirring protrusions are provided on the inner wall of the rotating drum to hook, disassemble, and stir used disposable diapers. These stirring protrusions are elongated along the axial direction of the rotating drum, and are formed at equal intervals around the circumferential direction from the inner wall of the rotating drum.

[0007] As the rotating drum rotates, the agitating protrusions hook and scrape up used diapers from the lower side of the rotating drum, and when the agitating protrusions are positioned on the upper side of the rotating drum, the used diapers hooked on the agitating protrusions fall to the lower side of the rotating drum, thereby dismantling the used diapers. As the used diapers fall from the agitating protrusions positioned on the upper side of the rotating drum to the lower side, they collide with the surface of the treatment liquid inside the rotating drum, and the used diapers are dismantled. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 3569260 Summary of the Invention [Problem to be solved by the invention]

[0009] However, when used disposable diapers are scraped up from the lower side of the rotating drum to the upper side and dropped to the lower side of the rotating drum, if the stirring protrusions do not scrape up the used disposable diapers reliably and the used disposable diapers stagnate at the lower side of the rotating drum, it takes a long time to dismantle the used disposable diapers, which creates the problem of increased processing time (dismantling time) for the used disposable diapers.

[0010] Furthermore, if the distance (height) from the agitation protrusions to the bottom of the rotating drum is short, the used disposable diapers caught on the agitation protrusions will immediately fall to the bottom of the rotating drum. In this case, the impact force on the used disposable diapers when they hit the surface of the treatment liquid inside the rotating drum is small, making it impossible to efficiently disassemble the used disposable diapers.

[0011] SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a separator for a used sanitary product treatment device that can efficiently disassemble used sanitary products and shorten the treatment time. [Means for solving the problem]

[0012] In order to solve the above-mentioned problems and achieve the object, a first aspect of the present invention is a separator for a used sanitary product treatment device, which comprises an inner body separating tank that is rotatably supported in an outer body separating tank fixed to a housing and rotates and agitates used sanitary products introduced therein together with a treatment liquid, and separates the used sanitary products into a plurality of materials that constitute the sanitary products, A scraping protrusion is provided on the inner wall of the inner body separation tank to scrape up the used sanitary products from the lower side of the inner body separation tank to an upper side above at least the vicinity of the liquid level of the treatment liquid in the inner body separation tank, and drop the used sanitary products from the upper side to the lower side of the inner body separation tank, thereby applying an impact force to the used sanitary products, The scraping projection has a scraping surface that is located on the front side of the rotation direction of the inner body separation tank and extends toward the rotation center of the inner body separation tank to lift the used sanitary products from the lower side to the upper side of the inner body separation tank, and a hooking corner that is located on the tip of the scraping surface on the rotation center side of the inner body separation tank to hook the used sanitary products, and at least water and lime a decomposition water supply unit for supplying decomposition water containing the bactericide and a disinfectant; A separator for a used sanitary product treatment device, characterized in that it has a discharge section that is connected to the lower side of the outer body separation tank and discharges wastewater containing dirt together with the decomposition water in the outer body separation tank.

[0015] The present invention 2 This aspect is characterized in that the liquid level of the treatment liquid is below the center of rotation of the inner body separation tank, and the scraping protrusion drops the used sanitary products onto the liquid level of the treatment liquid from a position at the lower side of the inner body separation tank at least above the liquid level of the treatment liquid.

[0016] The present invention 3 This aspect is characterized in that the scraping protrusion drops the used sanitary products onto the surface of the treatment liquid between a position 60 degrees and a position 150 degrees in the rotational direction from the lowest side of the inner body separation tank. [Effects of the Invention]

[0017] According to the present invention, by providing a scraping-up protrusion on the inner wall of the inner body separation tank, used sanitary products are scraped up from the lower side of the inner body separation tank to an upper side above at least the liquid level of the treatment liquid in the inner body separation tank, and then dropped from the upper side to the lower side of the inner body separation tank, thereby applying an impact force to the used sanitary products, thereby making it possible to efficiently dismantle used paper diapers and shorten the processing time. [Brief explanation of the drawings]

[0018] [Figure 1]FIG. 1 is a schematic diagram showing a used sanitary product treatment apparatus that uses a separator for a used sanitary product treatment apparatus according to the present invention. [Figure 2] FIG. 2 is a rear view showing a separator for a used sanitary product treating device according to the present invention. [Figure 3] FIG. 3 is a front view showing a separator for a used sanitary product treating device according to the present invention. [Figure 4] FIG. 4 is a partially cutaway side view showing a separator for a used sanitary product treatment device according to the present invention. [Figure 5] FIG. 5 is a cross-sectional view showing a shaft support part that supports the inner body separation tank of the separator for the treatment device for used sanitary products according to the present invention. [Figure 6] FIG. 6 is an explanatory diagram showing the initial state of decomposition when used disposable diapers are placed in the inner body separation tank of the separator and a treatment liquid is supplied. [Figure 7] FIG. 7 is a perspective view showing a scraping projection provided in the inner body separation tank of the separator for the used sanitary product treatment device according to the present invention. [Figure 8] FIG. 8 is a cross-sectional view showing the scraping protrusion, taken in a direction intersecting the axial direction of the inner body separation tank. [Figure 9] FIG. 9 is an explanatory diagram showing the state of used disposable diapers in the inner body separation tank at the beginning of decomposition. [Figure 10] FIG. 10 is an explanatory diagram showing the state of used disposable diapers in the inner body separation tank at the end of the decomposition stage. [Figure 11] FIG. 11 is a perspective view showing an example of another shape of the scraping projection. [Figure 12] FIG. 12 is a perspective view showing an example of another shape of the scraping projection. [Figure 13] FIG. 13 is a perspective view showing an example of another shape of the scraping projection. DETAILED DESCRIPTION OF THE INVENTION

[0019] The separator for a used sanitary product treatment device according to the present invention will be described below. The used sanitary product treatment device (hereinafter referred to as the "treatment device") separates the materials constituting used sanitary products, such as used disposable diapers, from the waste absorbed in the used disposable diapers, and recovers the separated materials.

[0020] Used disposable diapers as sanitary products to be disposed of in this embodiment are composed of a surface material, leak-prevention gathers, water-absorbing material, waterproof material, and other materials. The surface material is made of nonwoven fabric such as polyester or polypropylene. The leak-prevention gathers are made of nonwoven fabric and elastic material. The water-absorbing material is made of a combination of absorbent paper, cotton-like pulp, polymer absorbent material, and other materials. The waterproof material is a waterproof sheet that covers the outside of the disposable diaper, and is made of nonwoven fabric made of synthetic fibers, etc. Other materials used include adhesive tape and fastening materials to fasten the disposable diaper.

[0021] In this embodiment, the term "material" refers to the plastics used in the absorbent polymer, surface material, and three-dimensional gathers of the disposable diaper, the pulp used in the absorbent paper, adhesive tape, rubber, etc. The used disposable diapers to be disposed of in this embodiment include so-called tape-type disposable diapers and pants-type disposable diapers.

[0022] The decomposition water used as the treatment liquid in the treatment device of this embodiment is a mixture of lime as a decomposition agent, hypochlorous acid as a disinfectant (germicide), and water, and the blending amounts of lime, hypochlorous acid, and water are set depending on the type and amount of used disposable diapers to be treated. Additives such as detergents and bleaches may also be added as needed.

[0023] It is to be noted that a mixture of lime and water may be used as the decomposition water, and hypochlorous acid as a disinfectant may be supplied to the treatment device separately from the decomposition water obtained by mixing lime and water. In this embodiment, the decomposition water is a mixture of lime as a decomposition agent, water, and hypochlorous acid as a disinfectant. A treatment device using the separator of this embodiment will be described below. In this embodiment, an example of treating used disposable diapers as sanitary products will be described.

[0024] [Processing device 1] Fig. 1 shows the overall configuration of a treatment device 1 that uses a separator 3. As shown in the figure, the treatment device 1 includes a separator 3 that decomposes used disposable diapers 2, which are used sanitary products, into the materials that make up the disposable diapers, a discharge section 4 that discharges wastewater containing waste matter together with the decomposition water in the separator 3 to the outside, and a sorter 5 that receives the materials separated by the separator 3 and dries them to separate at least the pulp and plastic that make up the disposable diapers.

[0025] [Features of the separator 3 of this embodiment] The separator 3 of this embodiment is provided with an inner body separating tank 8 that is rotatably supported in an outer body separating tank 7 fixed to a housing 6 and rotates and agitates used sanitary products introduced therein together with a treatment liquid 34. In the inner body separating tank 8, used disposable diapers 2 are separated into the multiple types of materials that make up disposable diapers.

[0026] Furthermore, the separator 3 of this embodiment is provided with scraping protrusions 10 on the inner wall 11 of the inner body separating tank 8, which scrape up used diapers 2 from the lower side of the inner body separating tank 8 to an upper side 36 that is at least above the vicinity of the liquid level 9 of the treatment liquid 34 in the inner body separating tank 8, and drop them from the upper side 36 to the lower side 33 of the inner body separating tank 8, thereby applying an impact force to the used sanitary products. The separator 3 used in the treatment device 1 of this embodiment will now be described.

[0027] [Separator 3] As shown in Figures 1 to 4, separator 3 is installed via vibration-isolating members 69 on base 68 placed on floor 67, and is composed of outer body separating tank 7 fixed to housing 6 on base 68, inner body separating tank 8 rotatably disposed within outer body separating tank 7, treated liquid supply section 14 that supplies treated liquid 34 into outer body separating tank 7, and discharge section 4 that discharges wastewater containing sewage together with treated liquid 34. Outer body separating tank 7 is cylindrical, with one end face formed with opening 16 that communicates with inlet / outlet port 15 provided in housing 6, and the other end face closed by back panel 17. When inlet / outlet port 15 is closed by inlet / outlet door 18, the interior of outer body separating tank 7 is sealed.

[0028] The inner body separating tank 8 is cylindrical with an inner diameter smaller than that of the outer body separating tank 7, and small diameter holes are formed along the entire outer surface (side surface) by punching or the like. One end face of the inner body separating tank 8 is located on the front side of the housing 6, and the other end face is located on the rear side of the housing 6. An opening 19 communicating with the loading / unloading port 15 of the housing 6 is formed on one end face of the inner body separating tank 8. A rotary drive shaft 20 protrudes from the other end face of the inner body separating tank 8 toward the rear side, penetrating the back plate 17 of the outer body separating tank 7. The rotary drive shaft 20, which protrudes toward the rear side and penetrates the back plate 17, is rotatably supported by a shaft support portion 21 provided on the rear side of the back plate 17.

[0029] As shown in Figure 5, the shaft support section 21 is formed by a cylindrical bearing case 23 fixed to the back plate 17 of the outer shell separating tank 7 by a support frame 22, and bearings 24, 25 that rotatably support the rotary drive shaft 20 on the back plate 17 side and rear side of the bearing case 23. The bearing case 23 is formed by a front case 26 on the back plate 17 side and a rear case 27 on the rear side, and these front case 26 and rear case 27 are connected at their center to form an integrated unit. The rotary drive shaft 20 is inserted through the front case 26 and rear case 27.

[0030] A bearing 24 is provided inside the front case 26 via a sleeve 28 to rotatably support the rear plate 17 side of the rotary drive shaft 20, and a bearing 25 is provided inside the rear case 27 to rotatably support the rear side of the rotary drive shaft 20. The tip of the rotary drive shaft 20 protrudes from the front case 26 and penetrates the rear plate 17, and is connected to the center of the rear side of the inner body separation tank 8. A pulley 29 is attached to the tip of the rotary drive shaft 20 protruding from the rear case 27. Rotational driving force from a motor 30 is transmitted to the pulley 29.

[0031] As shown in Figures 1 and 2, the motor 30 is disposed at the upper side of the separator 3, directly above the rotary drive shaft 20, and is fixed to the housing 6. A transmission belt 32 is wound between the drive shaft 31 of the motor 30 and a pulley 29 attached to the tip of the rotary drive shaft 20. The rotational drive force of the motor 30 is transmitted to the rotary drive shaft 20 via the transmission belt 32 and the pulley 29, causing the inner body separation tank 8 to rotate within the outer body separation tank 7, and agitating the used disposable diapers 2 placed in the inner body separation tank 8 together with the treatment liquid 34.

[0032] As shown in Figure 6, a scraping protrusion 10 is provided on the inner wall 11 of the inner body separation tank 8, which scrapes up used paper diapers 2 from the lower side 33 within the inner body separation tank 8 to an upper side 36 above at least the vicinity of the liquid level 9 of the treatment liquid 34 within the inner body separation tank 8, and drops the used paper diapers 2 from the upper side 36 toward the lower side 33 within the inner body separation tank 8, thereby applying an impact force to the used paper diapers 2.

[0033] The scraping protrusions 10 are elongated along the rotation axis direction of the inner body separation tank 8 and protrude from the inner wall 11 toward the rotation axis direction of the inner body separation tank 8. The scraping protrusions 10 are provided at six locations at equal intervals around the circumference of the inner body separation tank 8. The scraping protrusions 10 have a scraping surface 12 that is located on the front side in the rotation direction of the inner body separation tank 8 and extends toward the rotation center 37 of the inner body separation tank 8 to lift used disposable diapers from the lower side 33 to the upper side 36 of the inner body separation tank 8, and a hooking corner 13 that is located at the tip of the scraping surface 12 on the rotation center 37 side of the inner body separation tank 8 and hooks used disposable diapers 2.

[0034] The scraping projection 10 has a trapezoidal cross section intersecting the rotation axis of the inner body separating tank 8, and an attachment portion 38 for attachment to the inner wall 11 is formed on the front side in the rotation direction A of the inner body separating tank 8, with a scraping surface 12 (described later) extending from this attachment portion 38 in the axial direction of the inner body separating tank 8. Furthermore, an attachment portion 39 for attachment to the inner wall 11 is formed on the rear side in the rotation direction of the inner body separating tank 8, and a support portion 40 is formed from this attachment portion 39 in the axial direction of the inner body separating tank 8. Furthermore, the scraping surface 12 and the support portion 40 are connected by a connecting top portion 41.

[0035] The liquid level 9 of the treatment liquid 34 is on the lower side 33 of the rotation center 37 of the inner body separation tank 8, and the scraping projection 10 is located at least on the upper side 36 of the liquid level 9 of the treatment liquid 34 from the position on the lower side 33 of the inner body separation tank 8, and drops the used disposable diapers 2 onto the liquid level 9 of the treatment liquid 34. Specifically, the scraping projection 10 drops the used disposable diapers 2 onto the liquid level 35 of the treatment liquid 34 between a position of approximately 30 degrees and a position of approximately 160 degrees in the rotation direction from the lower side 33 of the inner body separation tank 8.

[0036] Used disposable diapers 2 are collected from ordinary households, hospitals, nursing homes, etc., and then weighed by a weighing conveyor 42 to form a lump of a predetermined weight, as shown in Fig. 1. This lump of used disposable diapers 2 is suspended by a feeder 43, moved to the front side of the separator 3, and fed into the interior of the housing 6, i.e., into the inner body separating tank 8, through the feed / take-out port 15. Decomposition water and detergent are supplied by a treatment liquid supply unit 14 into the inner body separating tank 8 into which the used disposable diapers 2 have been fed.

[0037] The treatment liquid supply unit 14 is composed of a decomposition water tank 44, a detergent tank 45, a decomposition water supply port 46, a supply pump 47, and pipes 48 and 49. The decomposition water tank 44 stores decomposition water as treatment liquid 34, which is a mixture of decomposition water, water, and a disinfectant prepared in a predetermined ratio. This decomposition water is supplied into the inner body separating tank 8 by the pump 47. When the decomposition water is supplied into the inner body separating tank 8, the inner body separating tank 8 is rotating at a predetermined rotation speed.

[0038] Used disposable diapers 2 are placed in the inner body separation tank 8, which is rotated at a predetermined rotation speed and to which treatment liquid is supplied. The used disposable diapers 2 are separated into pulp, high molecular weight polymers, plastics, and other materials that make up the disposable diapers. The high molecular weight polymers are also decomposed, and waste (wastewater) is separated from the inside. The decomposition water (wastewater) obtained after the used disposable diapers 2 are decomposed in the inner body separation tank 8 is discharged to the discharge section 4. At this time, solids that do not dissolve in the decomposition water (undissolved pulp and plastic) remain in the inner body separation tank 8, and the pulp and waste (wastewater) that have dissolved in the decomposition water are discharged to the discharge section 4.

[0039] The discharge section 4 is composed of a wastewater receiving tank 50 into which the decomposition water in the outer body separation tank 7 is discharged, a drainage pit 51 that filters and temporarily stores the wastewater, and a drainage pipe 52 that connects the wastewater receiving tank 50 and the drainage pit 51 and directs the wastewater into the drainage pit 51. The decomposition water that is decomposed from used disposable diapers 2 by the supplied decomposition water is discharged into the wastewater receiving tank 50, and the decomposition water contains a mixture of waste (wastewater such as urine) contained in the polymer, any attached waste, and pulp. The decomposition water containing pulp discharged into the wastewater receiving tank 50 passes through the drainage pipe 52 and is stored in the drainage pit 51. The decomposition water stored in the drainage pit 51 contains a large amount of pulp, and the pulp is separated from the decomposition water and collected by a pulp recovery device (not shown).

[0040] The solids (undissolved pulp and plastic) that did not dissolve in the decomposition water and remain in the inner body separation tank 8 are dehydrated by rotating the inner body separation tank 8 after the supply of decomposition water to the inner body separation tank 8 is stopped. The decomposition water removed from the pulp and plastic by this dehydration is discharged to the discharge section 4. The dehydrated solids, i.e., the pulp and plastic that did not dissolve in the decomposition water, are sent from the inlet / outlet port 15 to the sorter 5 by the conveyor 42.

[0041] The sorting machine 5 is composed of an outer body sorting tank 54 fixed and supported within a housing 53, an inner body sorting tank 55 rotatably arranged within the outer body sorting tank 54, an unloading and conveying section 56 provided below the outer body sorting tank 54, and a dry air supply section 57 arranged above the housing 53 for supplying dry air into the outer body sorting tank 54.

[0042] The outer body sorting tank 54 is cylindrical and fixed to the housing 53 with one end face in close contact with one inner surface of the housing 53 and the other end face in close contact with the other inner surface of the housing 53. An input-side opening communicating with an input port 58 of the housing 53 is formed at one end face, and an output-side opening communicating with an output port 59 of the housing 53 is formed at the other end face. Dry air is introduced into the outer body sorting tank 54 from a dry air supply unit 57, and the pulp and plastic in the inner body sorting tank 55 are dried.

[0043] The inner body sorting tank 55 has a cylindrical shape with a diameter slightly smaller than that of the outer body sorting tank 54, and both axial end faces are open, and are connected to the openings at both ends of the outer body sorting tank 54. The inner body sorting tank 55 also has a plurality of through holes formed by punching or the like all over its circumferential side surface. The pulp and plastic in the rotating inner body sorting tank 55 are dried by dry air introduced into the outer body sorting tank 54 from a dry air supply unit 57.

[0044] The dry air supply section 57 is composed of a heater 60, a fan 61, a dry air inlet 62, and a dry air outlet 63. The heater 60 is formed of multiple heat exchange pipes, and high-temperature steam is supplied to these pipes. Outside air passes around the pipes, heating the outside air to generate dry air, which is then sent into the outer shell sorting tank 54 via the dry air inlet 62. The fan 61 sucks the dry air from the outer shell sorting tank 54 through the dry air outlet 63 and sends it into a duct 64. A pulp recovery device 65 equipped with a bag filter is connected to the duct 64. The fan 61 exhausts (sucks out) the dry air from the outer shell sorting tank 54, introducing the outside air into the heater 60. The outside air is heated by the heater 60 to generate dry air, which is then supplied into the outer shell sorting tank 54.

[0045] As a result, moisture evaporates from the pulp and plastic in the rotating inner shell sorting tank 55, and the pulp and plastic are dried and sorted. In addition, dry air sucked out from the outer shell sorting tank 54 by the fan 61 is sent to the pulp recovery device 65 via the duct 64, and the pulp contained in the dry air is recovered by a bag filter.

[0046] After the pulp and plastic are dried, they are separated and sorted. Of the separated pulp and plastic, the pulp is removed to the outside by the removal conveying section 66, and the plastic is removed to the outside from the removal port 56.

[0047] Next, we will explain the processing of used disposable diapers 2 by the separator 3. After a predetermined weight of used disposable diapers 2 is placed into the inner body separating tank 8, the processing liquid 34 is supplied into the inner body separating tank 8 by the processing liquid supply unit 14, and the inner body separating tank 8 is rotated at a predetermined rotation speed. When the processing liquid 34 is supplied into the inner body separating tank 8 while rotating the inner body separating tank 8 into which the used disposable diapers 2 have been placed, the rotation of the inner body separating tank 8 causes the scraping-up protrusions 10 to scrape up the used disposable diapers 2 from the lower side 33 to the upper side 36 within the inner body separating tank 8.

[0048] As shown in Figure 6, when a predetermined amount of used disposable diapers 2 has been placed in the inner body separation tank 8, the used disposable diapers 2 are located above the liquid surface 9 of the treatment liquid 34 to the upper side 36. When the inner body separation tank 8 is rotated at a predetermined rotation speed from this state, as shown in Figure 9, at the initial stage of decomposition, the used disposable diapers 2 come into contact with the scraping surface 12 and are scraped up from the lower side 33 of the inner body separation tank 8 to the upper side 36 of the inner body separation tank 8 while being hooked on the hooking corner 13. The used disposable diapers 2 scraped up to the upper side 36 slide down from the scraping surface 12 and fall onto the liquid surface 9. At this time, the used disposable diapers 2 collide with the liquid surface 9 and used disposable diapers 2 floating near the liquid surface 9, and are subjected to an impact force. When an impact force is applied to the used disposable diaper 2, the surface material, leak-preventing gathers, water-absorbing material, waterproof material, and other components that make up the disposable diaper 2 are physically decomposed, and the treatment liquid 34 penetrates into these components.

[0049] When the inner body separation tank 8 is rotated for a predetermined time from the state shown in Fig. 9 and the used disposable diapers 2 are agitated together with the treatment liquid 34 in the inner body separation tank 8, at the end of the decomposition stage, as shown in Fig. 10, the used disposable diapers 2 are broken down into smaller pieces to become the components that make up the disposable diaper, and as the disposable diapers break down and become smaller, the treatment liquid 34 soaks into the used disposable diapers 2, causing the liquid level 9 of the treatment liquid 34 to drop to the lower side 33. At the initial stage of decomposition of the used disposable diapers 2, if the lower side 33 is the initial position, the used disposable diapers 2 are scraped up from the liquid level 9 of the treatment liquid 34 at a position of about 90 degrees to the upper side 36 at a position of about 150 degrees, and then fall onto the liquid level 9 from the upper side 36 at a position of about 150 degrees. At the end of the decomposition stage, the used disposable diaper 2 becomes even smaller, and if the lower side 33 is taken as the initial position, the used disposable diaper 2 falls from the liquid surface 35 of the treatment liquid 34 at an angle of approximately 60 degrees onto the liquid surface 35 at an angle of approximately 150 degrees on the upper side 36. When the used disposable diaper 2 is decomposed and becomes smaller, it falls toward the liquid surface 35 from an angle smaller than the approximately 150 degrees on the upper side 36.

[0050] When the decomposition process of the used disposable diapers 2 is completed, the treatment liquid 34 is discharged from the inner body separation tank 8 to the discharge section 4. The discharged treatment liquid 34 (discharged liquid) contains a mixture of waste (wastewater such as urine) that has been decomposed from the used disposable diapers 2 and contained in the high molecular weight polymer, any adhering waste, and pulp, and is drained into the wastewater receiving tank 50. The decomposition water containing pulp drained into the wastewater receiving tank 50 passes through the drain pipe 52 and is stored in the drainage pit 51. The decomposition water stored in the drainage pit 51 contains a large amount of pulp, and the pulp is separated from the decomposition water and collected by a pulp recovery device (not shown).

[0051] The solids (undissolved pulp and plastics) that did not dissolve in the treatment liquid 34 and remained in the inner body separation tank 8 are dehydrated by rotating the inner body separation tank 8 after the supply of decomposition water to the inner body separation tank 8 is stopped. The dehydrated solids, i.e., the pulp and plastics that did not dissolve in the treatment liquid 34, are sent from the inlet / outlet port 15 to the sorter 5 by the conveyor 42.

[0052] The solid materials (pulp, plastic) sent to the sorter 5 are sorted by the evaporation of water from the pulp and plastic in the rotating inner sorting tank 55. The dry air sucked out of the outer sorting tank 54 by the fan 61 is sent to the pulp recovery device 65 via the duct 64, and the pulp contained in the dry air is recovered by a bag filter.

[0053] As described above, according to the separator 3 for a used sanitary product treatment device of this embodiment, the used disposable diapers 2 are scooped up from the lower side 33 in the inner body separation tank 8 to the upper side 36 which is at least above the liquid level 9 of the treatment liquid 34 in the inner body separation tank 8, and then dropped from the upper side 36 to the lower side 33 in the inner body separation tank 8, thereby applying an impact force to the used disposable diapers 2.By this, the used disposable diapers 2 can be efficiently disassembled and the treatment time can be shortened.

[0054] In addition, according to the separator 3 for treating used sanitary products in this embodiment, by providing a hooking corner portion 13 at the tip side of the scraping surface 12 of the scraping protrusion 10, the used disposable diapers 2 can be securely hooked, and more used disposable diapers 2 can be scraped up from the lower side 33 to the upper side 36, thereby reducing the amount of used disposable diapers 2 remaining on the lower side 33 and enabling the used disposable diapers 2 to be disassembled efficiently.

[0055] Furthermore, the scraping projections 10 cause the used disposable diapers 2 to fall from the upper side 36 to the lower side 33 and collide with the liquid levels 9, 35, so that the decomposition water serving as the treatment liquid 34 is thoroughly soaked into the used disposable diapers 2 and the used disposable diapers 2 are immersed in the decomposition water. In this case, even if the used disposable diapers 2 are pants-type, they can be decomposed by colliding them with the liquid levels 9, 35, and the treatment liquid 34 is thoroughly immersed in the used disposable diapers 2, so that the used disposable diapers 2 can be reliably separated into their respective materials.

[0056] In addition, in the above embodiment, the motor 30 that applies rotational driving force to the inner body separation tank 8 is located in the upper and central part of the housing 6, which allows for a large space to be created on the lower side of the housing 6, thereby improving the freedom of installation of piping etc. for discharging waste liquid from the inner body separation tank 8, and also preventing the motor 30 from getting in the way when performing maintenance on the shaft support portion 21, improving maintainability.

[0057] In the above embodiment, used disposable diapers 2 were used as an example of used sanitary products, but the separator 3 of the present invention can also be used when processing sanitary products that use absorbent materials (high molecular weight polymers), such as urine absorption pads.

[0058] In addition, in the above embodiment, the scraping surface 12 is provided on the forward side of the scraping protrusion 10 in the rotation direction A of the inner body separator 8, but if the rotation direction of the inner body separation tank 8 is reverse rotation (opposite to the rotation direction A), it may be provided on the forward side in the reverse rotation direction of the support part 40. In this case, a hook corner part 13 may be provided at the continuous part between the tip of the support part 40 in the rotation axis direction of the inner body separator and the connecting top part 41.

[0059] Furthermore, in the above embodiment, the scraping protrusion 10 has a trapezoidal cross-sectional shape, but it does not necessarily have to be trapezoidal as long as the scraping surface 12 is provided on the front side in the rotation direction A of the inner body separation tank 8. Furthermore, the support portion 40 does not have to have the same shape as the scraping surface 12, and may have any shape that supports the scraping surface 12. Other shapes of the scraping protrusion shown in Figures 11 to 13 will be described below.

[0060] The scraping protrusion 70 shown in Figure 11 has a triangular cross-sectional shape when cut in a direction intersecting the rotation axis of the inner body separation tank 8, with a scraping surface 71 provided on the forward side of the rotation direction A of the inner body separation tank 8 and a hook corner portion 72 provided at the tip in the direction of the rotation axis of the inner body separation tank 8.

[0061] The scraping protrusion 73 shown in Figure 12 has a trapezoidal cross section cut in a direction intersecting the rotation axis of the inner body separation tank 8, and has a scraping surface 74 provided on the front side in the rotation direction A of the inner body separation tank 8. The connecting top 75 of this scraping protrusion 73 is formed in a mountain shape, and a hook corner 76 is formed at the tip of each mountain.

[0062] The scraping protrusion 81 shown in Figure 13 has a triangular cross section cut in a direction intersecting the rotation axis of the inner body separation tank 8, and has a scraping surface 77 on the front side in the rotation direction A of the inner body separation tank 8, and a V-shaped groove 79 on the connecting top 78. A hook corner 80 is provided at the connecting part between the edge of this groove 79 and the scraping surface 77.

[0063] As described above, while an embodiment of the present invention has been disclosed, it will be apparent that modifications may be made by those skilled in the art without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the claims. [Industrial Applicability]

[0064] The separator for a used sanitary product treatment device according to the present invention can be used not only to treat used disposable diapers, but also to treat sanitary products that absorb urine and other waste using high molecular weight polymers, such as sanitary napkins and urine absorption pads. [Explanation of symbols]

[0065] 1. Used sanitary product treatment equipment 2. Used disposable diapers 3 Separator 6. Housing 7 Outer shell separation tank 8 Inner shell separation tank 9 35 Liquid level 10 Raking protrusion 11 Inner wall 12 Raised surface 13 Hook corner

Claims

1. A separator for a used sanitary product treatment device, comprising an inner body separation tank that is rotatably supported in an outer body separation tank fixed to a housing and rotates and agitates used sanitary products introduced therein together with a treatment liquid, and that separates the used sanitary products into a plurality of materials that constitute the sanitary products, A scraping protrusion is provided on the inner wall of the inner body separation tank to scrape up the used sanitary products from the lower side of the inner body separation tank to an upper side above at least the vicinity of the liquid level of the treatment liquid in the inner body separation tank, and drop the used sanitary products from the upper side to the lower side of the inner body separation tank, thereby applying an impact force to the used sanitary products, The scraping projection has a scraping surface that is located on the front side of the rotation direction of the inner body separation tank and extends toward the rotation center of the inner body separation tank to lift the used sanitary products from the lower side to the upper side of the inner body separation tank, and a hooking corner that is located on the tip of the scraping surface on the rotation center side of the inner body separation tank to hook the used sanitary products, and a decomposition water supply unit that supplies decomposition water consisting of at least water, lime, and a disinfectant to the used sanitary products placed in the inner body separation tank; A separator for a used sanitary product treatment device, characterized in that it has a discharge section that is connected to the lower side of the outer body separation tank and discharges wastewater containing dirt together with the decomposition water in the outer body separation tank.

2. the liquid level of the treatment liquid is below the rotation center of the inner body separation tank, The separator for a used sanitary product treatment device as described in claim 1, characterized in that the scraping protrusion drops the used sanitary products onto the surface of the treatment liquid from a lower position of the inner body separation tank at least above the surface of the treatment liquid.

3. The separator for a used sanitary product treatment device as described in claim 2, characterized in that the scraping protrusion drops the used sanitary products onto the surface of the treatment liquid between a position of 60 degrees and a position of 150 degrees in the rotational direction from the lowest side of the inner body separation tank.

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