JP2012170920A - Stirring and separating tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stirring and separating tank capable of separating properly two substances different in sizes by simple constitution.SOLUTION: The stirring and separating tank 10 includes a storage container 10c for storing a treating liquid Q fed in with the first substance V and the second substance P smaller than it, a porous plate 10p formed with a plurality of pores passing the second substance P but not passing the first substance V, and a lead-out pipe 10d extended outside from a lower part of a stirring part 10t, to lead out the first substance V to an outside. The porous plate 10p is installed inclinedly to an inside of the storage container 10c to be partitioned into the upper stirring part 10t and a lower precipitation part 10s. The storage container 10c is formed with a discharge port 10h for discharging the second substance P to an outside, in the precipitation part 10s. Consequently, a flow of the treating liquid Q from the precipitation part 10s toward the stirring part 10t is generated along with going-down of a liquid level, when leading out the treating liquid Q from the lead-out pipe 10d, to separate the first substance V deposited onto the porous plate 10p to close the pores.

Description

  The present invention relates to a stirring / separating tank, and more particularly to a stirring / separating tank that appropriately separates two substances having different sizes.

  Recently, the demand for disposable diapers is increasing due to the growing elderly population against the background of the longevity accompanying the development of medical treatment and living environment. In general, used paper diapers are incinerated. On the other hand, from the viewpoint of reducing global warming gas emissions, the reduction of waste, the reuse of resources, and the formation of a recycling society are consensus of the global society. Against the backdrop of the demands of such times, attempts to reuse used paper diapers have begun. As a technology for reusing used paper diapers, pre-washing used paper diapers, dividing them into appropriate sizes, dropping the separated paper diapers with dehydrating agent into the washing water, stirring them, vinyl and polymer absorbent polymer Pulp / polymer that has been decomposed into pulp and pulp, scraped by the scraping means at the top of the endless belt, scraped off the vinyl suspended in the washing water in the tank, and carried out by the endless screen, and settled by the sediment feed means at the bottom of the endless belt There is a technique for obtaining a high-quality recycled pulp by sending an absorbent polymer to a discharge port (see, for example, Patent Document 1).

JP 2002-273259 (paragraphs 0008-0011, FIG. 1)

  However, if an endless belt that uses both scraping means and sediment feed means or an endless screen is used, the apparatus becomes large and complicated.

  An object of this invention is to provide the stirring separation tank which can isolate | separate appropriately two substances from which magnitude | size differs with a simple structure in view of the above-mentioned subject.

  In order to achieve the above object, the stirred separation tank according to the first aspect of the present invention includes a first substance V and a second substance P smaller than the first substance V as shown in FIG. A container 10c for containing the processing liquid Q charged with; and a perforated plate 10p in which a plurality of holes having a size through which the second substance P passes but not the first substance V are formed, A perforated plate 10p that is installed inside the storage container 10c and that divides the interior of the storage container 10c into an upper stirring part 10t and a lower sedimentation part 10s; from the lower part of the stirring part 10t to the outside of the storage container 10c A lead-out pipe 10d that extends to the stirring unit 10t and that leads the first substance V to the outside of the storage container 10c; the storage container 10c in the sedimentation part 10s includes the second substance P A discharge port 10h for discharging the gas to the outside of the storage container 10c It has been made.

  With this configuration, when the processing liquid is led out from the outlet pipe, a flow of the processing liquid from the sedimentation section toward the stirring section occurs as the liquid level decreases, and the liquid adheres to the perforated plate. The first substance that has blocked the first substance can be peeled off, and the first substance and the second substance can be appropriately separated with a simple configuration.

  Further, the stirring / separation tank according to the second aspect of the present invention is introduced into the storage container 10c in the stirring / separation tank 10 according to the first aspect of the present invention as shown in FIGS. 2 and 3, for example. A stirring device 10m for causing the processing liquid Q to flow so that the horizontal component swirls; the perforated plate 10p is radially descending from the outer periphery of the container 10c toward the center of the swirling flow R. And a protrusion 10pr is formed so that the height along the radial radiation gradually increases in the direction of the turning R and then decreases gradually.

  If comprised in this way, it can avoid that the porous plate which faces the back side of the porous plate which receives a swirl flow is obstruct | occluded by the 1st substance.

  In addition, the stirring / separation tank according to the third aspect of the present invention is, for example, as shown in FIG. 2, in the stirring / separation tank 10 according to the first aspect or the second aspect of the present invention described above. And a processing liquid supply pipe 24 for supplying the processing liquid Q to the outlet pipe 10d.

  If comprised in this way, the upward flow of the process liquid which goes to a stirring part from a derivation pipe will arise, and it will become possible to return the 2nd substance which entered the derivation pipe to a stirring part again, and the 2nd substance It is possible to improve the collection efficiency in the precipitation part.

  Moreover, the stirring / separation tank according to the fourth aspect of the present invention is, for example, as shown in FIG. 2, in the stirring / separation tank 10 according to any one of the first to third aspects of the present invention. Discharge pipes 18 and 19 having one end connected to the discharge port 10h and extending downward from the storage container 10c, the processing liquid Q discharged together with the second substance P from the discharge port 10h to the outside of the storage container 10c. There are provided discharge pipes 18 and 19 opened at the other ends immediately above a predetermined high liquid level in the receiving tanks 11 and 12 (see, for example, FIG. 1).

  If comprised in this way, the hydrostatic head of the other end of a discharge pipe can be enlarged, and the discharge time of the process liquid from a discharge port can be shortened.

  According to the present invention, when the processing liquid is led out from the outlet pipe, a flow of the processing liquid from the sedimentation part to the stirring part occurs with a decrease in the liquid level, and the pores adhere to the perforated plate. The first substance that has blocked the first substance can be peeled off, and the first substance and the second substance can be appropriately separated with a simple configuration.

It is a typical distribution diagram of a used paper diaper processing system including a used paper diaper processing device concerning an embodiment of the invention. It is a longitudinal cross-sectional view which shows schematic structure of the stirring separation tank which comprises the processing apparatus of the used paper diaper which concerns on embodiment of this invention. It is a figure explaining the stirring separation tank which comprises the processing apparatus of the used paper diaper which concerns on embodiment of this invention. (A) is a schematic plan view, (b) is a partial side sectional view. It is a flowchart of the process sequence of the processing apparatus of the used paper diaper which concerns on embodiment of this invention. It is a typical systematic diagram which shows another embodiment of the washing | cleaning apparatus which comprises the processing system of the used paper diaper which concerns on embodiment of this invention. It is a typical systematic diagram which shows another embodiment of the processing system of the used paper diaper which concerns on embodiment of this invention. It is a systematic diagram which shows the flow of the substance in the processing system of the used paper diaper shown in FIG. It is a figure explaining the structure of the stirring separation tank which concerns on a modification. (A) is side surface sectional drawing, (b) is a schematic plan view.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or similar members are denoted by the same or similar reference numerals, and redundant description is omitted.

  First, with reference to FIG. 1, the processing system 101 of a used paper diaper provided with the processing apparatus 1 of the used paper diaper which has the stirring separation tank 10 which concerns on embodiment of this invention is demonstrated. FIG. 1 is a schematic system diagram of a used paper diaper processing system 101 (hereinafter simply referred to as “processing system 101”). The paper diaper D includes pulp PL as a base material, which is a main material, polymer PM as a water-absorbing substance, and vinyl V (first substance) as a plastic part such as a tape, a nonwoven fabric, or a waterproof sheet. It consists of In the present embodiment, the pulp PL and the polymer PL may be collectively referred to as “deplasticized raw material P”. The removal plastic raw material P is one form of the material for regeneration, and corresponds to the second material. The processing system 101 is a system that separates the polymer PM, the pulp PL, and the vinyl V from the used paper diaper D containing filth (human waste) and takes out renewable resources. In addition, when processing with the processing system 101, the polymer PM has lost water absorption by chemicals. The processing system 101 includes a processing device 1 for used paper diapers (hereinafter simply referred to as “processing device 1”) and a rinsing cleaning device 40 as a cleaning device. The processing apparatus 1 includes a stirring / separation tank 10, a heavy sewage tank 11 as a first recovery tank, a light sewage tank 12 as a second recovery tank, a separation device 20, and a control device 60. . The main equipment is a stirring / separation tank 10, a heavy sewage tank 11, and a light sewage tank 12, which constitutes a stirring / separation apparatus.

  Here, with reference to FIG. 2, the structure of the stirring separation tank 10 is demonstrated. FIG. 2 is a longitudinal sectional view of the stirring / separation tank 10. The agitation / separation tank 10 is for cleaning the used paper diaper D that has been cut without being preliminarily cleaned, and for removing the vinyl V roughly. The agitation / separation tank 10 is formed with a plurality of holes of a size that does not allow most of the vinyl V to pass through the storage container 10c that stores the processing liquid Q as the processing liquid and the processing liquid Q in which the removed plastic raw material P is diffused. Perforated plate 10p, lead-out pipe 10d for leading vinyl V out of the container 10c, and heavy sewage as a first discharge pipe for discharging the processing liquid Q in which the removal plastic raw material P has diffused out of the container 10c Stirring that stirs the discharge pipe 18 and the light sewage discharge pipe 19 as the second discharge pipe, and the processing liquid Q in the container 10c by causing the horizontal component to swirl and simultaneously causing the vertical component to rise and fall. And a mixer 10m as an apparatus.

  The container 10c has a shape in which a conical member is connected to the lower portion of a cylindrical member with its apex facing down. The container 10c is arranged so that the axis of the cylindrical member is vertical, and the apex of the conical member is positioned on the extension of the axis of the cylindrical member. A lead-out pipe 10d is provided on an extension line of the axis of the cylindrical member. The lead-out pipe 10d penetrates the top of the conical member, one end protrudes into the storage container 10c, and the other end extends outside the storage container 10c. A vinyl removal screen 10e for removing vinyl V from the derived processing liquid Q is installed at the tip of the other end of the outlet pipe 10d. The processing liquid Q remaining after the vinyl V is removed by the vinyl removal screen 10e is configured to be introduced into the lightly sewage tank 12 (see FIG. 1) via the pipe 10er. The outlet pipe 10d is provided with an on-off valve 10v that opens and closes the flow path outside the container 10c. As the on-off valve 10v, a pinch valve is used in the present embodiment. The perforated plate 10p is made of punching metal in the present embodiment, and is provided so as to descend downward from the inside of the outer peripheral side wall of the storage container 10c toward one end of the outlet tube 10d.

  In FIG. 3, the installation aspect of the perforated panel 10p is shown in detail. FIG. 3A is a plan view of the stirring / separation tank 10, and FIG. 3B is a partial side sectional view around the perforated plate 10p. The perforated plate 10p is divided into a plurality of pieces and arranged in the circumferential direction of the container 10c so as to be inclined radially. In the present embodiment, 12 divided triangular members are formed as the lead-out pipe 10d. Are arranged so as to surround. In the present embodiment, the perforated plate 10pa arranged flat in the direction in which the processing liquid Q swirls by the mixer 10m (circumferential direction of the container 10c having a circular cross section) R (see FIG. 3B), One unit of porous plate 10pU is composed of the perforated plate 10pb disposed so as to be gradually increased and the perforated plate 10pc disposed so as to be sequentially decreased, and this one unit of perforated plate 10pU is turned in the swivel direction. Repeatedly arranged in R. The perforated plate 10pb and the perforated plate 10pc form a protrusion 10pr whose connecting portion is the top. Each of the perforated plates 10pa, 10pb, and 10pc constituting one unit is flat or changes in height such as up or down when viewed in the turning direction R, but the perforated plates 10p arranged in a radial manner. When looking in the direction of the radiation (line extending in one direction from a certain point) (radial direction of the container 10c having a circular cross section), any part is inclined downward from the outer periphery to the center of the container 10c. Installed.

  As shown in FIG. 2, the storage container 10c is partitioned by a porous plate 10p into an agitation unit 10t above the porous plate 10p and a precipitation unit 10s below. A mixer 10m is disposed in the stirring unit 10t. The mixer 10m includes a shaft 10ma that stands vertically, a motor 10me that is attached to an end of the shaft 10ma and rotates the shaft 10ma around the axis, and a fin 10mf that creates a swirling flow of the processing liquid Q in the stirring unit 10t. have. The shaft 10ma is installed such that its axis coincides with the axis of the cylindrical member of the storage container 10c. The fin 10mf is formed in a blade shape that can move the processing liquid Q in the container 10c upward while flowing in the turning direction R (see FIG. 3). The fin 10mf is attached to the shaft 10ma near the perforated plate 10p.

  The lead-out tube 10d opens to the stirring unit 10t, and does not open directly to the precipitation unit 10s. By being configured in this way, the processing liquid Q in the sedimentation section 10s does not flow directly into the outlet pipe 10d (without passing through the stirring section 10t). Two discharge ports 10h for discharging the processing liquid Q in which the removal plastic raw material P is diffused are formed in the sedimentation portion 10s of the storage container 10c. The discharge port 10h is formed near the apex of the conical member of the container 10c. A heavy sewage discharge pipe 18 as a first discharge pipe is connected to one of the two discharge openings 10h, and light sewage discharge as a second discharge pipe is connected to the other discharge opening 10hb. A tube 19 is connected. The heavy sewage discharge pipe 18 extends downward to a length in which the other end is opened immediately above a predetermined high liquid level in the heavy sewage tank 11 (see FIG. 1). The most recently above is a position that is above and as close as possible to a predetermined high liquid level. The light sewage discharge pipe 19 also follows the heavy sewage discharge pipe 18 and extends downward to a length at which the other end opens immediately above a predetermined high liquid level in the light sewage tank 12 (see FIG. 1). By comprising in this way, the hydrostatic head of the lower end of the heavy sewage discharge pipe 18 and the light sewage discharge pipe 19 can be enlarged, and shortening of discharge time can be aimed at. The heavy sewage discharge pipe 18 is provided with an on-off valve 18v as a first on-off valve for opening and closing the flow path. The light sewage discharge pipe 19 is provided with an on-off valve 19v as a second on-off valve for opening and closing the flow path. In the present embodiment, the on-off valve 18v and the on-off valve 19v are pinch valves or butterfly valves.

  Returning to FIG. 1 again, the description of the processing apparatus 1 will be continued. The heavy waste water tank 11 and the light waste water tank 12 are provided below the stirring / separation tank 10. The heavy sewage tank 11 and the light sewage tank 12 are arranged such that the heavy sewage tank 11 is on the heavy sewage discharge pipe 18 side and the light sewage tank 12 is on the light sewage discharge pipe 19 side. With this configuration, when the on-off valve 18v is opened, the processing liquid Q flows into the heavy sewage tank 11, and when the on-off valve 19v is opened, the processing liquid Q flows into the light sewage tank 12. In the present embodiment, the treated liquid Q that has been used for the first time to clean the used paper diaper D that has not been preliminarily washed or the treated liquid Q that has been washed until the content of human waste is reduced to an allowable range is introduced into the heavy sewage water tank 11, and human waste Is assumed to be introduced into the light sewage tank 12, and the treatment liquid Q introduced into the heavy sewage tank 11 is called heavy sewage Q1. The treatment liquid Q introduced into the sewage tank 12 is referred to as light sewage Q2.

  Above the light sewage tank 12, a vibrating screen 15 is installed as a substance extraction / separation machine for regeneration. The vibrating screen 15 is a device that introduces heavy sewage Q1 in the heavy sewage tank 11 and separates the plastic removal raw material P contained in the heavy sewage Q1. The vibrating screen 15 is disposed above the light sewage tank 12 so that the separated removed plastic material P can be dropped into the light sewage tank 12. One end of a heavy sewage transport pipe 16 that guides the heavy sewage Q 1 to the vibrating screen 15 is connected to the heavy sewage tank 11, and the other end of the heavy sewage transport pipe 16 opens above the vibrating screen 15. The heavy sewage transport pipe 16 may be connected to the vibrating screen 15. The heavy sewage transport pipe 16 is provided with a heavy sewage pump 13 that pumps the heavy sewage Q1 to the vibrating screen 15. One end of a liquid pipe 82 to which the concentrated sewage Q3, which is the treatment liquid Q after the removal plastic raw material P is removed from the heavy sewage Q1, is connected to the vibration screen 15. The other end of the liquid pipe 82 to be treated is connected to a sewage treatment tank 81 that purifies the concentrated sewage Q3. The sewage treatment tank 81 is a treatment liquid Q obtained by purifying the septic tank 81B, a flow rate adjustment tank 81A provided in front of the septic tank 81B in order to adjust the supply flow rate of the concentrated sewage Q3 to the septic tank 81B, and the concentrated sewage Q3. You may divide | segment into the storage tank 81C which stores the processed water Q4. By dividing in this way, the purification process can be leveled regardless of the variation in the flow rate of the concentrated sewage Q3 introduced into the sewage treatment tank 81, and the demand for the treated water Q4 can be accommodated. In the sewage treatment tank 81 (storage tank 81C), one end of a drain pipe 89 that discharges a part of the treated water Q4 as drainage Y to the outside of the system, and one end of a purification liquid pipe 84 that flows the treated water Q4 Is connected. In the purification liquid pipe 84, a purification liquid pump 85 that pumps the treated water Q4 is disposed. One end of a light sewage transport pipe 17 through which the light sewage Q2 flows is connected to the light sewage tank 12. The light sewage transport pipe 17 is provided with a light sewage pump 14 that pumps the light sewage Q2.

  The separation device 20 separates the light sewage Q2 containing the removed plastic raw material P into the removed plastic raw material P and the separated water Q5 (the treated liquid Q from which the removed plastic raw material P has been removed from the light sewage Q2). Q5 is a device that makes it possible to use the separation tank 10 again, and includes a circulating water tank 21 as a separation liquid tank, a separation screen 23 as a regeneration material-containing liquid separator, and a separation water pipe 24 as a separation liquid pipe. It is configured to include.

  The separation screen 23 has a screen that allows the treatment liquid Q to pass but does not pass the removal plastic raw material P. The separation screen Q is derived from the light wastewater Q2 by removing the removal plastic raw material P, and the remaining removal plastic raw material P It can be carried out from the side. An end portion of the light sewage transport pipe 17 is connected to the separation screen 23 so that the light sewage Q2 transported from the light sewage tank 12 can be introduced into the separation screen 23. Further, the separation screen 23 is connected to a pipe 23 </ b> D that guides the separation water Q <b> 5 to the circulating water tank 21. Further, a pipe 28 for introducing a liquid for cleaning the removed plastic raw material P is connected to the separation screen 23. The other end of the pipe 28 is connected to the other end of the purification liquid pipe 84 so that the treated water Q4 can be introduced into the separation screen 23 in order to use it as a liquid for cleaning the plastic removal raw material P. Has been. The separation screen 23 is connected to a pipe 23E that guides the liquid after the removal of the plastic removal raw material P to the circulating water tank 21. Below the separation screen 23, a dehydrator 29 for removing moisture from the removed plastic raw material P carried out from the side of the separation screen 23 is provided. The dehydrator 29 is connected to a pipe 29 </ b> D that guides the water removed from the removed plastic raw material P to the circulating water tank 21.

  The circulating water tank 21 is preferably disposed in the vicinity of the separation screen 23 in order to easily receive the separated water Q5 separated by the separation screen 23. When the circulating water tank 21 is formed in a size having an effective capacity equal to or greater than the amount of the processing liquid Q used for stirring and washing in the stirring / separation tank 10 (amount of water during stirring and washing), at least one stirring and washing is performed. It is preferable because it can secure the amount of water necessary for the cleaning, and from the viewpoint of avoiding the shortage of the processing liquid Q during stirring and cleaning, it is more preferable to have an effective capacity that is at least twice the amount of water during stirring and cleaning. From this viewpoint, the effective capacity is preferably 5 times or less the amount of water during stirring and washing. One end of a separation water pipe 24 is connected to the lower part of the circulating water tank 21. The other end of the separation water pipe 24 is connected to the outlet pipe 10d upstream of the on-off valve 10v (see FIG. 2). The separation water pipe 24 is a form of a processing liquid supply pipe. Further, in a plan view in which the separation water pipe 24 is connected to the outlet pipe 10d in a plan view in which an axially perpendicular section of the outlet pipe 10d appears, the virtual extension line of the axis of the separation water pipe 24 deviates from the center of the outlet pipe 10d. Is preferably overlapped with the tangent on the outer periphery of the outlet pipe 10d, since the separated water Q5 flowing into the outlet pipe 10d from the separation water pipe 24 flows in the outlet pipe 10d while turning. The separation water pipe 24 is provided with a separation water pump 25 that pumps the separation water Q5 toward the stirring / separation tank 10. In addition, an open / close valve 24v (see FIG. 2) for opening and closing the flow path is disposed in the separation water pipe 24 downstream of the separation water pump 25 (preferably in the immediate vicinity of the outlet pipe 10d).

  The control device 60 controls the operation of the processing device 1. The control device 60 is connected to the power source of the motor 10me (see FIG. 2) of the mixer 10m, the vinyl removal screen 10e, the vibration screen 15, and the separation screen 23 with a signal cable, and can control the start and stop of these. It is configured to be able to. Moreover, the control apparatus 60 is connected with the power source of the heavy sewage pump 13, the light sewage pump 14, the fractionation water pump 25, and the purification liquid pump 85 with a signal cable, and can control the start and stop of these. It is configured. The control device 60 is connected to the on-off valves 10v, 18v, 19v, and 24v (see FIG. 2) by signal cables, respectively, and is configured to control the opening and closing of the flow path.

  With reference to FIG. 1 again, the configuration of a rinse cleaning device 40 as a cleaning device provided in the processing system 101 will be described. The rinse cleaning device 40 is a device that extracts the pulp PL by separating the removed plastic raw material P extracted by the processing device 1 into the pulp PL and the polymer PM that has lost water absorption, and is a rinsing thick adjustment tank as a diffusion tank 41, a selection screen 42 as a base material separation means, a pulp separation screen 43 as a base material separator, an industrial water pipe 74 as a cleaning liquid introduction pipe, and a rinse cleaning liquid pipe as a cleaning liquid outlet pipe 47, a polymer sorting screen 94 as a water-absorbing substance sorting machine, and a circulation means to be described later.

  The rinsing thickening tank 41 receives the detachment raw material P from the dehydrator 29 (from the separation screen 23 when the dehydrator 29 is omitted), and receives the rinsing raw material water S4 in which the detachment raw material P has diffused into the cleaning liquid S. It is a tank to be generated. The rinsing concentration adjustment tank 41 is configured to have an effective capacity capable of accommodating an amount of the cleaning liquid S that can make the concentration of the rinsing raw material water S4 in which the removed plastic raw material P has diffused with a pump. The concentration of the rinsing raw material water S4 can be reduced by increasing the amount of the cleaning liquid S in the rinsing thick adjustment tank 41, and can be increased by decreasing the amount of the cleaning liquid S. Can be adjusted. One end of a rinsing raw material water pipe 44 is connected to the lower portion of the rinsing thick adjustment tank 41. The other end of the rinsing raw material water pipe 44 is connected to a selection screen 42. The rinsing raw material water pipe 44 is provided with a rinsing raw material water pump 45 that pumps the rinsing raw material water S4 toward the selective screen 42.

  The selection screen 42 is an apparatus that introduces the rinsing raw material water S4 and extracts the pulp PL from the removed plastic raw material P diffused in the rinsing raw material water S4. The selection screen 42 has a screen that allows the pulp PL to pass but does not allow the polymer PM to pass through. The polymer-containing water S5 obtained by removing the pulp PL from the rinsing raw material water S4, and the pulp water S6 including the extracted pulp PL It is comprised so that it can derive | lead-out. A rinsing raw material water pipe 44, a polymer-containing water pipe 42M through which the polymer-containing water S5 flows, a pulp water pipe 42L that guides the pulp water S6 to the pulp sorting screen 43, and a rinsing washing liquid pipe 47A, which will be described later, are connected to the selection screen 42. ing. The polymer-containing water pipe 42M is laid so as to guide the polymer-containing water S5 to the polymer sorting screen 94 that extracts the polymer PM. Connected to the polymer separation screen 94 is a pipe 94D that guides the water after the removal of the polymer PM from the polymer-containing water S5 to the rinsing and concentration tank 41.

  The pulp separation screen 43 introduces the pulp water S6 from the selection screen 42 and introduces the industrial water W through the industrial water pipe 74 to wash the pulp PL and remove the washing liquid S adhering to the pulp PL. Device. The pulp separation screen 43 is typically disposed below the sieving screen 42 and above the rinse thickening tank 41. In addition to the pulp water pipe 42L and the industrial water pipe 74, the pulp separation screen 43 includes a pipe 43D for guiding the cleaning liquid S removed from the pulp PL to the rinsing water tank 46, and a rinsing concentration of the cleaning liquid S removed from the pulp PL. A pipe 43E led out toward the tank 41 is connected. Below the pulp sorting screen 43, a dehydrator 49 for further removing moisture from the pulp PL carried out from the side of the pulp sorting screen 43 is provided. The dehydrator 49 is connected to a pipe 49 </ b> D that guides moisture removed from the pulp PL to the rinsing tank 41. In the present embodiment, the pipe 43E through which the cleaning liquid S removed by the pulp sorting screen 43 is connected to the pipe 49D, but the pipe 43E is configured to guide the cleaning liquid S directly to the rinsing tank 41. May be.

  The rinse water tank 46 temporarily stores the cleaning liquid S removed from the pulp PL by the pulp separation screen 43, and the cleaning liquid S is stored in the rinsing / concentration tank 41, the processing apparatus 1, or the selective screen 42 depending on the situation. It is a buffer tank that distributes to Inside the rinse water tank 46, there is provided an overflow pipe 46F that guides the cleaning liquid S exceeding the determined liquid level to the rinse concentration tank 41. One end of a rinsing cleaning liquid pipe 47 that allows the cleaning liquid S to flow toward the processing apparatus 1 and the selection screen 42 is connected to the lower portion of the rinsing cleaning water tank 46. A rinse cleaning liquid pump 48 that pumps the cleaning liquid S is disposed in the rinse cleaning liquid pipe 47. The rinse cleaning liquid pipe 47 is branched downstream of the rinse cleaning liquid pump 48 into two rinse cleaning liquid pipes 47A and 47B. The rinse cleaning liquid pipe 47A is connected to the upper part of the selection screen 42. The rinse cleaning liquid pipe 47 </ b> B is connected to the pipe 28 of the processing apparatus 1. In the present embodiment, the circulation means includes the pulp water pipe 42L, the pipes 43D and 43E, the rinse raw material water pipe 44, the rinse washing water tank 46, the rinse washing liquid pipe 47, and the pipe 49D.

  The operation of the processing system 101 will be described with reference to FIGS. In addition, description of the effect | action of the processing apparatus 1 is demonstrated as a part of effect | action of the processing system 101, and description of the effect | action of the stirring separation tank 10 is demonstrated as a part of effect | action of the processing apparatus 1. FIG. In the present embodiment, the disposable diaper D processed by the processing system 101 varies depending on the use situation, but human waste accounts for about 60 to 80% (typically about 70%). The amount is, for example, 10t. The paper diaper D is cut before being put into the stirring / separation tank 10. The paper diaper D does not need to be washed before cutting, and can be cut as it is collected.

  Here, the processing procedure in the processing apparatus 1 will also be described with reference to FIG. FIG. 4 is a flowchart showing a processing procedure in the processing apparatus 1. When the processing of the used paper diaper D is started, the processing liquid Q is introduced into the storage container 10c before the cut paper diaper D is put into the storage container 10c (St1). At that time, the on-off valves 10v, 18v, 19v, 24v are in a closed state. The treatment liquid Q is introduced into the storage container 10c through the outlet pipe 10d by opening the open / close valve 24v and starting the separation water pump 25 to introduce the separation water Q5 in the circulating water tank 21. Is called. Further, when introducing the processing liquid Q into the storage container 10c, chemicals for preventing further water absorption of the polymer PM are also introduced. When the processing liquid Q is introduced into the storage container 10c, the cut paper diaper D is put into the storage container 10c (St2). Note that the step (St1) of introducing the processing liquid Q (and chemicals) into the storage container 10c and the step of introducing the cut diaper (St2) into the storage container 10c (St2) may be performed at the same time. The reverse is also possible.

  If the paper diaper D is thrown in, the control apparatus 60 will start the motor 10me of the mixer 10m, and will stir the process liquid Q into which the cut paper diaper D was thrown in (St3). When the motor 10me is activated, the fin 10mf rotates in the turning direction R around the shaft 10ma. Then, due to the structure of the fin 10mf, the processing liquid Q rotates in the turning direction R in the horizontal direction component and flows so as to rise near the shaft 10ma and fall near the outer periphery in the vertical direction component. By stirring the processing liquid Q into which the paper diaper D is charged, the vinyl V is peeled off, and the pulp PL, the polymer PM, and human waste are diffused or dissolved in the processing liquid Q. Since the protrusion 10pr is formed by the two porous plates 10pb and 10pc when the processing liquid Q is agitated, the porous plate in which the flow of the horizontal component of the processing liquid Q is inclined upward in the swirl direction R Colliding with 10 pb, the decomposition of the disposable diaper D is promoted. The peeled vinyl V tends to generally rise on the surface of the processing liquid Q due to the difference in density, but there may be some that remain in the processing liquid Q. At this time, it is conceivable that the vinyl V remaining in the processing liquid Q adheres to the porous plate 10p and closes the hole of the porous plate 10p. However, at least the porous plate 10pc on the back side of the porous plate 10pb has no treatment liquid Q. Since the flow does not collide and the vinyl V is prevented from adhering, it can be avoided that all the holes of the porous plate 10p are blocked by the vinyl V.

  When the stirring (St3) is completed, the control device 60 opens the on-off valve 18v and draws out the processing liquid Q in the container 10c into the heavy sewage tank 11 (St4). At this time, since the processing liquid Q flows into the heavy sewage discharge pipe 18 from the sedimentation part 10s, the processing liquid Q after passing through the perforated plate 10p is discharged to the heavy sewage tank 11, and heavy sewage The treatment liquid Q (heavy sewage Q1) in the tank 11 does not contain vinyl V in principle. In the step (St4) of extracting the treatment liquid Q in the storage container 10c into the heavy sewage tank 11, the viscosity increases due to the diffused pulp PL and polymer PM even if all of the treatment liquid Q in the storage container 10c is to be extracted. (Pulp PL and polymer PM are not loose enough to pass through the holes of the perforated plate 10p), so a lot of pulp PL and polymer PM remain on the perforated plate 10p together with the vinyl V. On the other hand, urine, which accounts for 60 to 80% of the used paper diaper D, is dissolved in the treatment liquid Q and is extracted to the heavy sewage tank 11. In the step (St4) of extracting the treatment liquid Q into the heavy sewage tank 11, it is preferable to extract the human waste as much as possible without extracting the pulp PL and the polymer PM as much as possible. If the extraction into the heavy sewage tank 11 is not enough to remove the urine, and if the urine exceeds the allowable range when the processing liquid Q is replenished next time, the extraction into the heavy sewage tank 11 and the processing liquid The replenishment of Q may be repeated a plurality of times. That is, the extraction into the heavy sewage tank 11 and the replenishment of the processing liquid Q may be repeated a plurality of times depending on the degree of contamination of the processing liquid Q in the container 10c. When the processing liquid Q is extracted into the heavy sewage tank 11, the on-off valve 18v is closed. The treatment of heavy sewage Q1 discharged to the heavy sewage tank 11 will be described later.

  After closing the on-off valve 18v, the control device 60 replenishes the storage container 10c with the processing liquid Q (St5). Here, the replenishment of the treatment liquid Q causes the pulp PL and the polymer PM remaining on the perforated plate 10p to diffuse into the treatment liquid Q so as to pass through the holes of the perforated plate 10p, and from the vinyl V. An appropriate amount of the processing liquid Q is introduced into the storage container 10c from the viewpoint of sufficient separation. In the step of replenishing the processing liquid Q (St5), it is not necessary to add a chemical for preventing further absorption of the polymer PM. Replenishment of the processing liquid Q to the storage container 10c is performed through the outlet pipe 10d by opening the open / close valve 24v and starting the fractionation water pump 25 to introduce the fractionation water Q5 in the circulating water tank 21. In this way, by replenishing the processing liquid Q via the outlet pipe 10d, the pulp PL or the like entering the outlet pipe 10d can be returned to the stirring unit 10t again, and the pulp PL is collected in the precipitation unit 10s. It becomes possible to raise the rate. Further, the separation water Q5 that has flowed into the outlet pipe 10d from the separation water pipe 24 flows in the outlet pipe 10d while turning, thereby improving the return rate of the pulp PL or the like to the stirring unit 10t.

  When the processing liquid Q is replenished, the control device 60 activates the motor 10me of the mixer 10m to stir the processing liquid Q in the stirring unit 10t (St6). Then, the pulp PL and the polymer PM remaining on the perforated plate 10p are diffused into the replenished processing liquid Q. Also in the stirring (St6) here, as in the first stirring (St3), the flow of the processing liquid Q is the porous plate 10pb on the front side of the protrusion 10pr formed by the two porous plates 10pb and 10pc. Therefore, it is possible to avoid that all the holes of the porous plate 10p are blocked by the vinyl V while the decomposition of the paper diaper D is promoted.

  When the stirring (St6) is completed, the control device 60 opens the on-off valve 19v and takes out the processing liquid Q in the container 10c into the light sewage tank 12 (St7). At this time, since the processing liquid Q flows into the light sewage discharge pipe 19 from the sedimentation part 10s, the processing liquid Q after passing through the perforated plate 10p is discharged to the light sewage tank 12, and light sewage The treatment liquid Q (lightly sewage water Q2) in the tank 12 does not contain vinyl V in principle. In the step of removing the processing liquid Q in the storage container 10c into the light sewage tank 12 (St7), in the present embodiment, the on-off valve 19v is closed when a part of the processing liquid Q in the storage container 10c is extracted. In addition, it is good also as taking out all the process liquids Q which were contained in the storage container 10c to the light sewage tank 12. The processing of the light sewage Q2 discharged to the light sewage tank 12 will be described later.

  After closing the on-off valve 19v, the control device 60 determines whether or not the processing liquid Q in the container 10c has been taken out to the light sewage tank 12 (St7) a predetermined number of times (St8). The predetermined number of times is typically determined from the viewpoint of whether the amount of pulp PL remaining in the storage container 10c has been reduced to an acceptable level (whether it has been taken out into the light sewage tank 12). The amount of pulp PL remaining in the storage container 10c is determined by the concentration of the pulp PL and the like in the storage container 10c before the processing liquid Q is extracted into the light sewage tank 12, and the processing per time taken out to the light sewage tank 12. Based on the amount of the liquid Q, it is grasped in advance. In other words, when the amount of the treatment liquid Q to be taken out to the light sewage tank 12 is determined, how many times the replenishment (St5) and removal (St7) of the treatment liquid Q are performed, the remaining pulp PL It is known in advance whether the amount falls to an acceptable level. In the present embodiment, the predetermined number of times is six. In the step of determining whether or not the processing liquid Q has been taken out a predetermined number of times (St8), if the predetermined number of times has not been reached, an appropriate one corresponding to the cleaning process of the pulp PL, the polymer PM, and the vinyl V is obtained. The process returns to the step (St5) of replenishing the storage container 10c with an amount of processing liquid Q (generally, the amount of processing liquid Q to be replenished per time decreases as the number of times of removal of the processing liquid Q increases). The step (St6), the step of taking out the processing liquid Q to the light sewage tank 12 (St7), and the step of determining whether or not the processing liquid Q has been taken out a predetermined number of times (St8) are repeated.

  On the other hand, in the step of determining whether or not the processing liquid Q has been taken out a predetermined number of times (St8), when the predetermined number of times has been reached, the control device 60 switches the open / close valve 24v as necessary. And the separation water pump 25 is activated to supply separation water Q5 (residual water) for taking out the vinyl V to the storage container 10c (St9). Thereafter, the control device 60 opens the on-off valve 10v of the outlet pipe 10d, and guides the vinyl V together with the processing liquid Q in the stirring unit 10t to the outside of the storage container 10c through the outlet pipe 10d (St10). At this time, since the perforated plate 10p is disposed in a descending gradient from the outer periphery of the storage container 10c toward the outlet tube 10d at the center, the vinyl V is reduced from remaining on the perforated plate 10p, and the outlet tube is reduced. Derived from 10d. This explanation is supplemented below. When the on-off valve 10v is opened, first, the liquid level in the stirring unit 10t decreases. When the liquid level decreases and becomes lower than the connection point between the outer periphery of the container 10c and the porous plate 10p, the liquid level of the precipitation unit 10s communicating with the stirring unit 10t through the hole of the porous plate 10p also decreases. Go. At this time, since the outlet for the processing liquid Q is only the outlet pipe 10d, the processing liquid Q in the sedimentation section 10s is also placed outside the storage container 10c via the stirring section 10t that is in direct communication with the outlet pipe 10d. Will be derived. At this time, since the processing liquid Q in the sedimentation part 10s moves from the sedimentation part 10s to the stirring part 10t almost horizontally (or slightly obliquely downward), even if there is vinyl V attached to the porous plate 10p. Then, it is peeled off by the processing liquid Q moving from the sedimentation part 10s to the stirring part 10t. By such an action, the vinyl V is reduced from remaining on the perforated plate 10p and led out from the lead-out pipe 10d.

  In parallel with the above-described processing in the storage container 10c or at an appropriate timing, processing of the heavy sewage Q1 extracted into the heavy sewage tank 11, processing and derivation of the light sewage Q2 extracted into the light sewage tank 12 Processing of the processing liquid Q derived from the tube 10d is performed as follows. The processing liquid Q led out from the lead-out pipe 10d is introduced into the vinyl removal screen 10e. The processing liquid Q introduced into the vinyl removal screen 10e is sieved to capture the vinyl V, and the processing liquid Q from which the vinyl V has been removed is guided to the light sewage tank 12 through the pipe 10er. Since the treatment liquid Q led out from the lead-out pipe 10d has been diluted by replenishing the treatment liquid Q a predetermined number of times, the treatment liquid Q is cleaner than the treatment liquid Q already taken out into the light sewage tank 12, and is removed. Since the plastic raw material P is also contained, it is preferable to guide to the light sewage tank 12.

  Heavy sewage Q1 discharged into the heavy sewage tank 11 is transported to the vibrating screen 15 via the heavy sewage transport pipe 16 when the heavy sewage pump 13 is activated. The heavy sewage Q1 introduced into the vibrating screen 15 is sifted, the removed plastic raw material P contained in the heavy sewage Q1 is introduced into the light sewage tank 12, and the residual sewage Q3 remaining after the removed plastic raw material P is extracted. Is led to the liquid pipe 82 to be processed. The concentrated sewage Q3 flowing through the liquid pipe 82 to be treated is introduced into the sewage treatment tank 81 and purified to become treated water Q4. The purified treated water Q4 is stored in the sewage treatment tank 81 (storage tank 81C), and a part thereof is discharged as waste water Y to the outside of the treatment system 101 via the drain pipe 89, and is supplied by a command from the control device 60. When the cleaning liquid pump 85 is activated, it flows through the cleaning liquid pipe 84 toward the sorting screen 23.

  The light sewage Q2 discharged into the light sewage tank 12 is transported to the sorting screen 23 through the light sewage transport pipe 17 when the light sewage pump 14 is activated. The light sewage Q2 introduced into the separation screen 23 is cleaned by the cleaning liquid S sent from the rinsing cleaning water tank 46 of the rinsing cleaning device 40 and / or the processed water Q4 from the sewage processing tank 81, and the screen. In this embodiment, the removed plastic material P is trapped via the dehydrator 29 in the rinsing and concentration tank 41. On the other hand, the treatment liquid Q after the removal plastic raw material P is extracted by the separation screen 23 flows through the pipe 23D and / or the pipe 23E, is introduced into the circulating water tank 21, and is stored as the separation water Q5. The separation water Q5 stored in the circulating water tank 21 flows through the separation water pipe 24 toward the outlet pipe 10d of the stirring / separation tank 10 when the separation water pump 25 is activated by a command from the control device 60.

  The removed plastic raw material P introduced into the rinsing and thickening tank 41 is diffused into the cleaning liquid S stored in the rinsing and thickening tank 41 to become a rinsing raw material water S4, which is transferred to the rinsing raw material water pump 45 and selected. To be introduced. In the selection screen 42, the separation of the pulp PL and the polymer PM diffused in the rinsing raw material water S4 is performed. At this time, in order to prevent clogging of the screen, the cleaning liquid S may be introduced into the selection screen 42 through the rinse cleaning liquid pipe 47A. The cleaning liquid S introduced into the selection screen 42 is sufficient to have a flow rate that can prevent clogging of the screen, and may be introduced continuously or intermittently. In the selection screen 42, the rinsing raw material water S4 is passed through the screen, and is divided into a polymer-containing water S5 in which the polymer PM is diffused and a pulp water S6 in which the pulp PL is diffused. The polymer-containing water S5 flows through the polymer-containing water pipe 42M and reaches the polymer sorting screen 94, where the polymer PM is extracted, and the remaining cleaning liquid S after the polymer PM extraction is put into the rinsing and concentration tank 41. The polymer PM extracted by the polymer separation screen 94 is appropriately reused as a raw material for other uses, for example.

  The pulp water S6 separated and extracted by the selection screen 42 is introduced into the pulp separation screen 43. After the pulp water S6 is washed with the industrial water W by the pulp separation screen 43, the adhering washing liquid S (including the industrial water W used for washing) is removed. The washing liquid S removed by the pulp separation screen 43 is introduced into the rinse washing water tank 46 through the pipe 43D, or is introduced into the rinsing / concentration tank 41 through the pipe 43E and the pipe 49D. The cleaning liquid S introduced into the rinsing cleaning water tank 46 is conveyed by the rinsing cleaning liquid pump 48 through the rinsing cleaning liquid pipe 47A to the selection screen 42 and also through the rinsing cleaning liquid pipe 47B (and the pipe 28). Then, it is conveyed to the sorting screen 23. The cleaning liquid S conveyed to the selection screen 42 has a flow rate that can prevent clogging of the screen as described above, and the cleaning liquid S conveyed to the separation screen 23 is typically a pulp separation screen 43. The flow rate is the same as that of the industrial water W introduced in. The distribution of the cleaning liquid S from the rinse water tank 46 to the selection screen 42 and the sorting screen 23 can be performed by providing a flow rate adjustment valve, an orifice, etc. (not shown). On the other hand, the pulp PL from which the washing liquid S has been removed by the pulp sorting screen 43 is put into the dehydrator 49 and dehydrated and then taken out. The pulp PL that has been dehydrated in the dehydrator 49 is reused as a raw material for disposable diapers. The cleaning liquid S removed from the pulp PL by the dehydrator 49 is collected and introduced into the rinsing / concentration tank 41 through the pipe 49D. The cleaning liquid S introduced into the rinsing concentration tank 41 is used again as the rinsing raw material water S4. Since the cleaning liquid S is circulated in this way, changing the flow rate of the rinsing raw material water pump 45 changes the flow rate of the cleaning liquid S returning to the rinsing concentration adjustment tank 41 and adjusts the concentration of the rinsing raw material water S4. can do.

  Next, a modification of the processing system 101 (see FIG. 1) according to the embodiment of the present invention will be described with reference to FIG. FIG. 5 is a system diagram of the intermediate cleaning device 30 as a cleaning device provided in the processing system according to the modification. The intermediate cleaning device 30 is installed instead of the rinse cleaning device 40 (see FIG. 1) in the processing system 101 (see FIG. 1). The configuration of the processing apparatus 1 (see FIG. 1) is the same as that of the processing system 101 (see FIG. 1). The intermediate cleaning device 30 is a device that extracts the pulp PL from the removed plastic raw material P extracted by the processing device 1 in the same manner as the rinsing cleaning device 40 (see FIG. 1), but the separation level of the pulp PL is the rinsing cleaning device 40. (See FIG. 1). The intermediate cleaning device 30 includes an intermediate concentration tank 31 as a diffusion tank, a liquid cyclone 32 as a base material separation means, an intermediate separation screen 33 as a base material separator, and an industrial use as a cleaning liquid introduction pipe. A water pipe 74, an intermediate cleaning liquid pipe 37 as a cleaning liquid outlet pipe, a polymer sorting screen 93 as a water-absorbing substance sorting machine, and a circulation means to be described later are provided. In the intermediate cleaning device 30 of the processing system according to the present modification, the rinsing / concentration tank 41, the selection screen 42, the pulp separation screen 43, and the rinsing cleaning of the rinsing device 40 (see FIG. 1) in the processing system 101 (see FIG. 1). The liquid pipe 47, the polymer separation screen 94, and the pipe 94D correspond to the intermediate concentration tank 31, the liquid cyclone 32, the intermediate separation screen 33, the intermediate cleaning liquid pipe 37, the polymer separation screen 93, and the pipe 93D, respectively.

  The intermediate concentrated tank 31 is a tank that receives the removed plastic raw material P from the dehydrator 29 (see FIG. 1) and generates intermediate raw water S1 in which the removed plastic raw material P has diffused into the cleaning liquid S. The intermediate concentration tank 31 is configured to have an effective capacity capable of accommodating an amount of the cleaning liquid S that can make the intermediate raw material water S1 in which the removed plastic raw material P diffuses into a concentration that can be conveyed by a pump. One end of an intermediate raw material water pipe 34 is connected to the lower part of the intermediate concentrated tank 31. The other end of the intermediate raw material water pipe 34 is connected to the liquid cyclone 32. The intermediate raw material water pipe 34 is provided with an intermediate raw material water pump 35 that pumps the intermediate raw material water S1 toward the liquid cyclone 32.

  The liquid cyclone 32 is an apparatus that introduces the intermediate raw material water S1 and extracts the pulp PL from the removed plastic raw material P that is diffused in the intermediate raw material water S1. The hydrocyclone 32 is formed in an inverted triangular pyramid shape, and by turning the introduced intermediate raw material water S1 along the side wall of the inverted triangular pyramid, the pulp-containing water S3 mainly containing the pulp PL is derived from the upper part. The polymer water S2 mainly containing the polymer PM is derived from the lower part. An intermediate raw material water pipe 34 is connected to the hydrocyclone 32 on the side surface of the inverted triangular pyramid. The intermediate raw material water pipe 34 is connected to the liquid cyclone 32 in such a direction that the intermediate raw water S1 introduced into the liquid cyclone 32 is along the side surface of the inverted triangular pyramid. A polymer water pipe 32M that guides the polymer water S2 to the polymer sorting screen 93 is connected to the bottom of the hydrocyclone 32. A pulp-containing water pipe 32 </ b> L that guides the pulp-containing water S <b> 3 to the intermediate fractionation screen 33 is connected to the upper part of the hydrocyclone 32.

  The intermediate separation screen 33 is a device that introduces the pulp-containing water S3 from the liquid cyclone 32 and introduces the industrial water W from the industrial water pipe 74 to wash the pulp PL and extract the pulp PL. The intermediate separation screen 33 is typically disposed below the liquid cyclone 32 and above the intermediate concentration tank 31. In addition to the pulp-containing water pipe 32L and the industrial water pipe 74, the intermediate separation screen 33 is left by extracting the pulp PL and the pipe 33D for guiding the cleaning liquid S remaining after the extraction of the pulp PL to the intermediate cleaning water tank 36. A pipe 33 </ b> E for leading the cleaning liquid S toward the intermediate concentration tank 31 is connected. A dehydrator 39 for further removing moisture from the pulp PL carried out from the side of the intermediate separation screen 33 is provided below the intermediate separation screen 33. The dehydrator 39 is connected to a pipe 39D that guides moisture removed from the pulp PL to the intermediate thickening tank 31, and in this embodiment, the pipe 33E is connected to the pipe 39D. The intermediate washing water tank 36 is configured in the same manner as the rinsing washing water tank 46 (see FIG. 1), and an overflow pipe 46F, a rinsing washing liquid pipe 47, and a rinsing washing liquid pump 48 around the rinsing washing water tank 46 are provided. These correspond to the overflow pipe 36F, the intermediate cleaning liquid pipe 37, and the intermediate cleaning liquid pump 38, respectively. However, the intermediate cleaning liquid pipe 37 is not branched like the rinsing cleaning liquid pipe 47 (see FIG. 1), and is connected to the pipe 28 (see FIG. 1) of the processing apparatus 1. In the present embodiment, the circulation means includes the pulp-containing water pipe 32L, the pipes 33D and 33E, the intermediate raw material water pipe 34, the intermediate wash water tank 36, and the pipe 39D.

  In the processing system according to the modified example configured as described above, the operation in the processing apparatus 1 (see FIG. 1) is the same as that of the processing system 101 (see FIG. 1). The removed plastic raw material P captured by the separation screen 23 (see FIG. 1) of the processing apparatus 1 (see FIG. 1) is put into the intermediate concentrated tank 31. The removed plastic raw material P introduced into the intermediate thick adjustment tank 31 is diffused into the cleaning liquid S stored in the intermediate high adjustment tank 31 to become intermediate raw water S1, transported to the intermediate raw water pump 35, and the liquid cyclone 32. To be introduced. The intermediate raw water S1 introduced into the hydrocyclone 32 swirls along the side wall, and the polymer water S2 containing the polymer PM is at the bottom due to the difference in shape or specific gravity difference between the fibrous pulp PL and the granular polymer PM. The pulp-containing water S3 that falls and contains the pulp PL is discharged upward. In addition, from the difference in characteristics between the hydrocyclone 32 and the selection screen 42 (see FIG. 1), the pulp-containing water S3 tends to contain more fine vinyl V waste than the pulp water S6 (see FIG. 1). It is in.

  The polymer water S2 falling to the bottom of the hydrocyclone 32 flows through the polymer water pipe 32M, the polymer PM is extracted by the polymer separation screen 93, and the remaining cleaning liquid S after the polymer PM extraction is put into the intermediate concentration tank 31. The The polymer PM extracted by the polymer separation screen 93 is appropriately reused as a raw material for other uses, for example. The pulp-containing water S3 discharged above the hydrocyclone 32 is introduced into the intermediate separation screen 33 via the pulp-containing water pipe 32L. After the pulp-containing water S3 is washed with the industrial water W by the intermediate separation screen 33, the adhering washing liquid S (including the industrial water W used for washing) is removed. The cleaning liquid S removed by the intermediate separation screen 33 is introduced into the intermediate washing water tank 36 through the pipe 33D, or is introduced into the intermediate concentration tank 31 through the pipe 33E and the pipe 39D. The cleaning liquid S introduced into the intermediate cleaning water tank 36 is conveyed by the intermediate cleaning liquid pump 38 to the separation screen 23 (see FIG. 1) via the intermediate cleaning liquid pipe 37 (and the pipe 28). The cleaning liquid S conveyed to the separation screen 23 typically has a flow rate equivalent to that of the industrial water W introduced into the intermediate separation screen 33. On the other hand, the pulp PL from which the washing liquid S has been removed by the intermediate separation screen 33 is put into the dehydrator 39 and dehydrated and then taken out. The pulp PL that has been dehydrated in the dehydrator 39 is reused as a raw material for disposable diapers. The cleaning liquid S removed from the pulp PL by the dehydrator 39 is collected and introduced into the intermediate thickening tank 31. The cleaning liquid S introduced into the intermediate concentration tank 31 is used again as the intermediate raw material water S1.

  Next, a processing system 102 according to another embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic system diagram of the processing system 102. The processing system 102 is different from the processing system 101 (see FIG. 1) in that an intermediate cleaning device 30 shown in FIG. 5 is provided between the processing device 1 and the rinse cleaning device 40. In the processing system 102, the intermediate cleaning device 30 functions as the first cleaning device, the rinse cleaning device 40 functions as the second cleaning device, and the intermediate cleaning device 30 is provided between the processing device 1 and the rinse cleaning device 40. Thus, the cleanliness of the extracted pulp PL can be further improved, and substances other than the pulp PL mixed in the extracted pulp PL can be reduced.

  Further, in the treatment system 102, the removed plastic raw material P that has been separated by the separation screen 23 and dehydrated by the dehydrator 29 is charged into the intermediate thickening tank 31, separated by the intermediate separation screen 33, and dehydrated by the dehydrator 39. The pulp PL (or the removed plastic raw material P containing the remaining polymer PM) is charged into the rinsing and thickening tank 41. Further, in the intermediate cleaning device 30 (see FIG. 5) of the processing system according to the modification, instead of the industrial water pipe 74 (see FIG. 5) connected to the intermediate separation screen 33, the rinsing cleaning liquid pipe 47B is used in the processing system 102. Are connected to the intermediate sorting screen 33. In other words, in the processing system 101 (see FIG. 1), the rinse cleaning liquid pipe 47B connected to the pipe 28 of the processing apparatus 1 is connected to the intermediate separation screen 33 instead of the pipe 28. The other configuration of the processing system 102 is the same as that of the processing system 101 (see FIG. 1).

  The processing system 102 configured as described above operates in the processing apparatus 1, the intermediate cleaning apparatus 30, and the rinsing cleaning apparatus 40 in terms of the processing apparatus 1 and the rinsing cleaning apparatus 40 of the processing system 101 (see FIG. 1), and modifications. This is the same as the operation in the intermediate cleaning device 30 (see FIG. 5) of the processing system according to the above. As an overview, the processing system 102 is configured such that the most dirty paper diaper D is first processed by the processing device 1, and the finally extracted pulp PL is sent from the processing device 1 to the intermediate cleaning device 30 and the rinse cleaning device 40. The degree of cleanliness gradually increases. On the other hand, after the cleanest industrial water W is first introduced into the pulp separation screen 43 of the rinse cleaning device 40 and circulated and used in the rinse cleaning device 40, the intermediate cleaning device 30 and the processing device 1 are used in stages. Finally, the waste water Y is discharged from the sewage treatment tank 81. In this way, the processing system 102 is sufficient if the industrial water W corresponding to the flow rate of the waste water Y discharged from the sewage treatment tank 81 is introduced into the rinsing cleaning device 40 in terms of the entire system. In addition, since the liquids S and Q introduced from the upstream side of the liquid flow are efficiently circulated and used for the cleaning and stirring process in the middle, the usage amount of the industrial water W can be minimized.

  An outline of the flow of the pulp PL and the flows of the liquids W, S, and Q will be described with reference to the system diagram of FIG. In FIG. 7, the processing device 1, the intermediate cleaning device 30, and the rinse cleaning device 40 are disposed from left to right. In general, in FIG. 7, the flow of the material constituting the paper diaper D is indicated by a broken line, and the used paper diaper D is introduced into the leftmost processing apparatus 1, and the pulp PL contained in the used paper diaper D is agitated. It flows from the left to the right while being cleaned, and is taken out from the rinse device 40 at the right end. On the other hand, in FIG. 7, the flow of the liquid used for cleaning and processing is indicated by a solid line, and industrial water W is introduced into the right-side rinsing cleaning device 40, flows from right to left, and the processing device 1 at the left end. Discharged from. The industrial water W introduced into the rinse cleaning device 40 circulates in the rinse cleaning device 40 as the cleaning liquid S, whereby the pulp PL is cleaned and transported. Of the cleaning liquid S circulating in the rinsing cleaning device 40, a flow rate corresponding to the industrial water W introduced is introduced into the intermediate cleaning device 30. The cleaning liquid S introduced into the intermediate cleaning device 30 is less clean than the industrial water W supplied into the rinsing cleaning device 40, but the pulp PL input into the intermediate cleaning device 30 is the rinsing cleaning device 40. Since it is soiled more than the pulp PL thrown in, it can wash | clean.

  The cleaning liquid S introduced into the intermediate cleaning device 30 is circulated through the intermediate cleaning device 30 to clean and transport the pulp PL and the polymer PM, and a flow rate corresponding to the introduced cleaning liquid S is supplied to the processing device 1. be introduced. The cleaning liquid S introduced into the processing apparatus 1 is used in the rinsing cleaning apparatus 40 and the intermediate cleaning apparatus 30, but the cleanliness level that can be used for processing in the processing apparatus 1 for used paper diapers D containing human waste. It is. The cleaning liquid S introduced into the processing apparatus 1 is circulated in the processing apparatus 1 as the processing liquid Q, whereby the used paper diaper D is stirred, separated, and cleaned. Of the processing liquid Q circulating in the processing apparatus 1, a flow rate corresponding to the introduced cleaning liquid S is discharged out of the processing system 102 through the sewage treatment tank 81.

  As described above, the processing system 102 is a sustainable system in which the liquids S and Q are circulated by the unit of the cleaning apparatus or the processing apparatus, and the entering and exiting liquids W, S, and Q are minimized. In this embodiment, the pulp PL is cleaned in two stages, that is, the intermediate cleaning device 30 and the rinse cleaning device 40. However, as can be predicted from FIG. The intermediate cleaning device 30 and / or the rinsing cleaning device 40 can be configured in multiple stages according to the required cleanliness and foreign material contamination. Even if it is configured in multiple stages, the amount of liquid (industrial water W) consumed per unit time is equivalent to that in the case where it is configured in two stages or one stage.

  Moreover, the processing system 102 can suppress the usage-amount of the industrial water W also when performing maintenance (inspection, cleaning) so that it may demonstrate below. First, in order to derive the vinyl V in the stirring / separation tank 10, the processing liquid Q is led out from the lead-out pipe 10d, and the empty container 10c is maintained. At this time, the storage container 10c may be maintained after the on-off valves 18v and 19v are opened and the processing liquid Q in the sedimentation section 10s is discharged. Next, heavy sewage water Q1 in the heavy sewage tank 11 is discharged through the sewage treatment tank 81, and light sewage water Q2 in the light sewage water tank 12 is transported to the circulating water tank 21. Empty and perform these maintenances. At this time, if the liquid level in the circulating water tank 21 becomes too high, the separated water Q5 in the circulating water tank 21 may be conveyed through the separating water pipe 24 to the storage container 10c that has already been maintained.

  Next, the separation water Q5 of the circulating water tank 21 is conveyed to the storage container 10c, and the circulating water tank 21 is maintained. At this time, when the liquid level of the storage container 10c becomes too high, the on-off valve 18v and / or the on-off valve 19v may be opened to discharge the processing liquid Q to the heavy sewage tank 11 and / or the light sewage tank 12. When the maintenance of the circulating water tank 21 is completed, the cleaning liquid S in the intermediate concentrated tank 31 is transferred to the circulating water tank 21 through the intermediate cleaning water tank 36, and the intermediate concentrated tank 31 is maintained. Next, the cleaning liquid S in the rinsing concentration tank 41 is conveyed to the intermediate concentration tank 31 via the rinsing cleaning water tank 46, and the rinsing concentration tank 41 is maintained. And when operating the processing system 102 for which maintenance has been completed again, the industrial water W may be introduced into the rinsing and concentration tank 41 via the pulp separation screen 43.

  Thus, since the liquid Q and S on the upstream side of the flow of the processing liquid and the cleaning liquid are introduced into the apparatus that has undergone maintenance, the liquids Q and S can be supplied without reducing the level of cleaning. The liquid that can be transferred and enters and exits the processing system 102 can be minimized. As described above, the processing system 102 is a sustainable system in which the incoming and outgoing liquids Q and S are minimized and used as much as possible during processing and maintenance. This effect can be similarly achieved in the processing system 101 (see FIG. 1 and FIG. 5) according to the modified example provided with the processing system 101 (see FIG. 1) and the intermediate cleaning device 30 having one less cleaning device.

  In the above description, the state where there is one stirring separation tank 10 is taken as an example, but two stirring separation tanks 10 having the same configuration are provided, and one is used while the other is in preparation and the other is a used paper diaper You may comprise so that D can be processed continuously. In this case, in each of the plurality of stirred separation tanks 10, the lower end of the heavy sewage discharge pipe 18 is opened above the heavy sewage tank 11, and the lower end of the light sewage discharge pipe 19 is opened above the light sewage tank 12. Become.

  In the above description, the protrusion pr is formed on the porous plate 10p, but the protrusion pr may not be formed. If there is no protrusion pr and it is flat, it is possible to reduce the vinyl V remaining on the porous plate 10p when the vinyl V is discharged. Although the perforated plate 10p is punched metal, the holes formed in the perforated plate 10p may be oval or slit in addition to the circular shape. That is, the removal plastic raw material P is passed but the vinyl V is allowed to pass. That's fine.

  In the above description, the mixer 10m having the motor 10me attached to the upper end of the vertically installed shaft 10ma is used as the stirring device of the stirring / separation tank 10, but the submerged water used in the processing liquid Q is used. A plurality of mixers may be installed so that the swirling flow of the horizontal component and the upstream and downstream of the vertical component can be created. If an underwater mixer is used as a stirring device, the obstacle at the time of putting used paper diaper D into the opening of the upper part of the container 10c is alleviated.

  In the above description, the storage container 10c of the stirring / separation tank 10 is configured to include a cylindrical member, but may be configured to have a prismatic member other than the cylindrical shape, for example, as illustrated in FIG. . FIGS. 8A and 8B are diagrams illustrating the configuration of a stirring / separation tank 710 according to a modification, in which FIG. 8A is a side cross-sectional view, and FIG. In the agitation / separation tank 710, the storage container 710c is formed in a rectangular quadrangular prism shape whose bottom plate is slanted in a single tone. The perforated plate 710p is formed in a rectangular shape, is inclined in the direction opposite to the inclination of the bottom plate, and is attached with both opposing sides connected to the bottom plate of the storage container 710c and the side surface intersecting with the bottom of the bottom plate. ing. Two sides of the perforated plate 710p that are orthogonal to the side that contacts the bottom plate of the container 710c are also connected to the side wall of the container 710c. By attaching the perforated plate 710p in this way, the inside of the container 710c is partitioned into an upper stirring portion 10t and a lower precipitation portion 10s. Further, the outlet pipe 10d is provided so that one end comes to the position where the bottom plate of the container 710c and the porous plate 710p are in contact, that is, the lowermost part of the stirring unit 10t. The other end of the outlet pipe 10d extends to the outside of the container 710c. A heavy sewage discharge pipe 18 and a light sewage discharge pipe 19 are connected to the lowermost part of the sedimentation section 10s. In addition, although illustration is abbreviate | omitted, the stirring separation tank 710 also has the mixer 10m (refer FIG. 2) similarly to the stirring separation tank 10 (refer FIG. 2). Even in the stirring / separation tank 710 configured as described above, when the liquid level of the precipitation unit 10s is lowered, the processing liquid Q in the precipitation unit 10s is substantially horizontal (or alternatively) from the precipitation unit 10s to the stirring unit 10t. Even if there is vinyl V that moves slightly diagonally downward and is stuck to the perforated plate 710p, it is peeled off by the processing liquid Q that moves from the settling portion 10s to the stirring portion 10t.

  In the above description, the other end of the purification liquid pipe 84 through which the treated water Q4 flows is connected to the separation screen 23. However, the other end of the purification liquid pipe 84 is connected to the outlet pipe 10d upstream of the on-off valve 10v. The treated water Q4 may be introduced into the storage container 10c through 10d. Whether the treated water Q4 is led to the outlet pipe 10d or the separation screen 23 may be determined according to the cleanliness of the treated water Q4.

  In the above description, the separation water Q5 is transported to the treatment device 1 by the operation of the separation water pump 25. However, an elevated tank is provided in the path of the separation water pipe 24 above the storage container 10c, and the separation water is separated by gravity. Q5 may be supplied to the processing apparatus 1. In this case, since the operation timing of the separation water pump 25 does not have to coincide with the introduction timing of the treatment liquid Q into the storage container 10c, the number of start / stop times of the separation water pump 25 and / or the separation water pump 25 The capacity can be reduced.

  In the above description, in the processing system 102 (see FIG. 6), the polymer sorting screen 93 for the intermediate cleaning device 30 and the polymer sorting screen 94 for the rinse cleaning device 40 are provided separately. Alternatively, the polymer sorting screen 93 may be used as the intermediate cleaning device 30 and the rinse cleaning device 40, and the polymer-containing water pipe 42M may be connected to the polymer sorting screen 93, and the polymer sorting screen 94 may be omitted. In this way, the system configuration can be simplified. On the other hand, if the polymer separation screen 93 for the intermediate cleaning device 30 and the polymer separation screen 94 for the rinse cleaning device 40 are provided separately, the cleaning that circulates in each of the intermediate cleaning device 30 and the rinse cleaning device 40. It is easy to adjust the balance of the liquid S.

DESCRIPTION OF SYMBOLS 1 Processing apparatus of used paper diaper 10 Stirring separation tank 10c Container 10d Outlet pipe 10h Discharge port 10m Mixer 10p Perforated plate 10pr Projection part 10s Precipitation part 10t Stirring part 11 Heavy waste water tank 12 Light waste water tank 15 Vibrating screen 18 Heavy waste water discharge pipe 18v On-off valve 19 Light sewage discharge pipe 19v On-off valve 21 Circulating water tank 23 Separation screen 24 Separation water pipe 25 Separation water pump 31 Intermediate thick adjustment tank 32 Liquid cyclone 33 Intermediate separation screen 34 Intermediate raw material water pipe 32M Polymer water pipe 41 Rinse thick adjustment tank 42 Screen 43 Pulp separation screen 44 Rinsing raw material water pipe 42M Polymer-containing water pipe 60 Controller 81 Sewage treatment tank 84 Purification liquid pipes 101, 102 Used paper diaper processing system D Used paper diaper PL Pulp PM Polymer P Deplasticized raw material Q Liquid Q1 Heavy sewage Q2 light sewage 3 Concentrated sewage Q4 treated water Q5 fractional water R turning direction S wash liquid S1 intermediate raw water S2 aqueous polymer S4 rinse material water S5 polymer-containing water V Vinyl

Claims (4)

A storage container for storing a processing liquid charged with a first substance and a second substance smaller than the first substance;
A perforated plate in which a plurality of holes of a size that allows the second substance to pass but not the first substance pass is formed, and is installed in an inclined manner inside the storage container. A perforated plate partitioned into a stirring section and a sedimentation section below;
A lead-out pipe extending from the lower part of the stirring unit to the outside of the containing container, the lead-out pipe communicating with the stirring unit and leading the first substance to the outside of the containing container;
A discharge port for discharging the second substance to the outside of the storage container is formed in the storage container of the sedimentation section;
Stir separation tank. A stirrer for flowing the processing liquid charged in the container so that a horizontal component swirls;
The perforated plate is installed in a radially inclined manner so as to have a downward gradient from the outer periphery of the containing container toward the center of the swirling flow, and the height along the radial radiation is a direction of the swirling Installed so as to form a protrusion that gradually increases and then gradually decreases;
The stirred separation tank according to claim 1. A processing liquid supply pipe for supplying the processing liquid into the storage container, the processing liquid supply pipe being connected to the outlet pipe;
The stirring / separating tank according to claim 1 or 2. A discharge pipe having one end connected to the discharge port and extending downward from the storage container and receiving the processing liquid discharged together with the second substance from the discharge port to the outside of the storage container A discharge pipe open at the other end immediately above a predetermined high liquid level in
The agitation / separation tank according to any one of claims 1 to 3.

Images