JP7266333B2 - Pulp recovery equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulp recovery apparatus that decomposes used sanitary goods into a plurality of materials and recovers pulp from waste water in which the pulp is dissolved.

In recent years, in hospitals, nursing homes, etc., paper diapers (disposable diapers) are used as sanitary disposable diapers. This disposable diaper is composed of an absorbent body made of pulp or the like, a high-molecular-weight absorbent body (high-molecular-weight polymer) that retains moisture absorbed by the absorbent body, and a material such as a waterproof material (plastic) that wraps them. Incontinence pads, etc. are also composed of materials such as an absorber made of pulp, etc., a high-molecular absorber (polymer) that retains the water absorbed by the absorber, and a waterproof material (plastic) that wraps these. there is Sanitary products such as used disposable diapers and incontinence pads are currently treated (disposed) as general waste.

Sanitary products such as used paper diapers and incontinence pads may be treated as general waste, for example, by incineration to generate harmful substances, and landfill disposal may cause soil deterioration due to infectious substances and the like.

Therefore, from a hygienic and environmental point of view, Patent Literatures 1, 2, and 3 propose a disposal apparatus for used disposable diapers, which disassembles and disposes of used disposable diapers as sanitary goods. In the apparatus for processing used paper diapers proposed in Documents 1, 2, and 3, the used paper diapers are mixed with a treatment liquid in a rotating drum, and decomposed into materials such as pulp, macromolecular polymers, and plastics. are doing.

In the used disposable diaper processing apparatus, when separating and dismantling into pulp, high molecular polymer, and plastic, the waste, high molecular polymer, and pulp are scattered in the processing liquid while the plastic remains in the drum, and this processing is performed. By filtering the liquid, pulp and macromolecular polymers are left behind, and the treated liquid containing dirt is discharged to the sewage treatment plant side. However, a large amount of pulp remains in the treated liquid containing dirt after disinfection.

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

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

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

In addition, since the equipment for recovering the pulp is large-scale, the cost for recovering the pulp is also high.

Therefore, the present invention is capable of recovering the pulp contained in the waste water from the waste water in which the used sanitary goods are decomposed into a plurality of kinds of materials with the decomposing water using simple equipment, and recovering the pulp. It is an object of the present invention to provide a pulp recovery device capable of reducing the cost of pulp recovery.

One aspect of the present invention for solving the above problems is a separator into which used sanitary goods and decomposition water are introduced, and the used sanitary goods are decomposed into a plurality of types of materials by the decomposition water, and discharged from the separator. A pulp recovery device for recovering pulp from a waste water, comprising: a casing; a drum screen on which the pulp moves and the pulp separated from moisture is recovered from the other side; a drive mechanism for rotating the drum screen; a rinsing liquid jetting section for jetting a liquid; and a water receiving tank provided in the housing on the lower side of the drum screen for receiving the water separated from the pulp and the rinsing liquid, wherein the decomposed water is water. The wastewater discharged from the separator, which consists of lime and a disinfectant, is temporarily stored in a wastewater pit, filtered, and then introduced into the drum screen from one side. a rotatable cylindrical body formed with a slit, an inlet-side end surface provided on one side of the cylindrical body in the axial direction and into which the waste water is introduced, and the other side of the cylindrical body in the axial direction. The cylindrical main body comprises a plurality of ring-shaped wedge wires and supports formed into a cylindrical shape by fixing the wedge wires in multiple stages. The slit is formed between the wedge wires, and the tubular body is arranged at an angle to the horizontal so that the recovery port side end surface is positioned lower than the introduction port side end surface. It is characterized by being

Further, one aspect of the present invention is characterized in that a cleaning agent is supplied to the separator separately from the decomposed water.

Further, in one aspect of the present invention, the separator includes a housing, an outer separation tank, an inner separation tank, and a decomposition water supply unit, and the decomposition water supply unit has a predetermined ratio. a decomposing agent tank in which decomposed water obtained by mixing the blended decomposing agent, water, and disinfectant is stored; a detergent tank; a decomposition water supply port; It is characterized by comprising a supply pump for sending water to the decomposed water supply port for supplying water into the separator, and a pipeline.

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

BRIEF DESCRIPTION OF THE DRAWINGS The front view which penetrated the inside which shows the pulp recovery apparatus which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram showing a used paper diaper separator from which waste water containing pulp is discharged to a pulp recovery device according to an embodiment of the present invention. FIG. 2 is a left side view of FIG. 1, showing the pulp recovery device according to the embodiment of the present invention. FIG. 2 is a right side view of FIG. 1, showing the pulp recovery device according to the embodiment of the present invention. FIG. 2 is a plan view of FIG. 1 showing a pulp recovery device according to an embodiment of the present invention; FIG. 2 is an enlarged cross-sectional view of a part of the drum screen of the pulp recovery device according to the embodiment of the present invention;

An embodiment of a pulp recovery apparatus according to the present invention will be described below. The pulp recovery apparatus according to the present embodiment decomposes used paper diapers, which are used sanitary goods, into a plurality of types of materials with water and decomposed water in a separator. , the pulp contained in this waste water is recovered.

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

In addition, adhesive tapes, fastening materials, etc. are used to fasten paper diapers. In the present embodiment, the material means polymer absorbers of paper diapers, surface materials, plastics used for three-dimensional gathers, etc., pulp used for water-absorbing paper, etc., adhesive tapes, rubbers, etc. .

Further, in the present embodiment, the decomposition water for decomposing the used paper diaper together with water in the separator is a mixture of lime as a decomposer, hypochlorous acid as a disinfectant, and water. The amounts of lime, hypochlorous acid, and water are set according to the type of used paper diapers to be treated and the amount of used paper diapers to be treated. Moreover, you may add a detergent, a bleaching agent, etc. as needed.

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

A pulp recovery apparatus according to the present embodiment and a separator for disassembling the pulp recovered by the pulp recovery apparatus from used paper diapers will be described below with reference to the drawings. First, a separator that decomposes a used paper diaper into a plurality of types of materials constituting the paper diaper with water and decomposition water will be described. A pulp recovery device recovers the pulp contained in the waste water decomposed by the separator.

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

The housing 2 has a box-like shape, and a circular loading/unloading port 8 is provided on the front side. Used paper diapers 6 are put into the inner barrel separation tank 4 from the inlet/outlet 8, and after the used paper diapers 6 are decomposed (dismantled), the solid matter remaining in the inner barrel separation tank 4 is removed. taken out. A circular loading/unloading door 9 is rotatably provided in the loading/unloading port 8 . An outer shell separation tank 3 is fixed inside the housing 2 .

The outer drum separation tank 3 has a cylindrical shape, and an opening 10 communicating with the loading/unloading port 8 of the housing 2 is formed in one end face, and the other end face is closed. Therefore, when the loading/unloading door 9 closes the loading/unloading port 8, the inside of the outer shell separation tank 3 is sealed. An inner separation tank 4 is rotatably arranged in the outer separation tank 3 .

The inner separation tank 4 has a cylindrical shape with an inner diameter smaller than that of the outer separation tank 3, and small-diameter holes are formed in the entire outer peripheral surface (side surface) by punching or the like. One end surface of the inner drum separation tank 4 is located on the front side of the housing 2 , and the other end surface is located on the rear side of the housing 2 . An opening 11 communicating with the loading/unloading port 8 of the housing 2 is formed on one end face side. A rotary drive shaft 12 protrudes from the other end face. A rotational drive force from a drive motor (not shown) is transmitted to the rotary drive shaft 12 to drive the inner drum separation tank 4 to rotate. Used paper diapers 6 are put into the inner trunk separation tank 4 , and decomposed water is supplied by the decomposed water supply unit 5 .

The decomposition water supply unit 5 is composed of a decomposition agent tank 13 , a detergent tank 14 , a decomposition water supply port 15 , a supply pump 16 and pipes 17 and 18 . The decomposing agent tank 13 stores decomposing water 7 obtained by mixing a decomposing agent, water, and a disinfectant blended at a predetermined ratio. The supply pump 16 sends the decomposed water 7 in which the decomposing agent, water, and disinfectant are mixed to the decomposed water supply port 15 that supplies the inside of the inner barrel separation tank 4 .

Then, the inner drum separation tank 4 is driven to rotate while the decomposition water 7 is poured from the top of the used paper diaper 6, and the used paper diaper 6 is separated from the plurality of types of used paper diapers 6 by the supplied decomposition water 7. material and waste (dirty water) absorbed in the used paper diaper 6 are separated. In this case, the used paper diaper 6 is evenly immersed (permeated) by the decomposed water, and the used paper diaper 6 is separated into a plurality of types of materials and waste (wastewater).

Solids that do not dissolve in the decomposition water 7 (pulp and plastics that did not dissolve in the decomposition water) remain in the inner barrel separation tank 4, and pulp and waste (waste water) dissolved in the decomposition water are discharged to the discharge unit 19. be. The discharge unit 19 includes a wastewater receiving tank 20 from which the decomposed water in the outer drum separation tank 3 is discharged, a wastewater pit 21 that filters and temporarily stores the wastewater, and sends the wastewater from the wastewater pit 21 to the pulp recovery device 23. It is formed with a pump 22 . Dissolved pulp is included in the waste water sent from the waste water pit 21 to the pulp recovery device 23 , and the pulp in the waste water is recovered by the pulp recovery device 23 .

As shown in FIGS. 1, 3, 4, and 5, the pulp recovery apparatus 23 of the present embodiment extracts pulp 24 from the waste water in which the used paper diaper 6 is decomposed into a plurality of types of materials using decomposing water. to recover. The pulp recovery device 23 is arranged in a housing 25 and in a rotating state in the housing 25, and separates the wastewater introduced from one side into water and the pulp 24, and moves the pulp 24 toward the other side. The drum screen 26 collects the pulp 24 separated from the water from the side, the drive mechanism 27 rotatingly drives the drum screen 26, and the rinsing liquid 28 for the pulp 24 separated from the water in the drainage in the drum screen 26. and a water receiving tank 30 provided on the lower side of the drum screen 26 in the housing 25 to receive the water separated from the waste water and the rinsing liquid 28 .

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

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

The drum screen 26 is formed of a tubular main body 42 , an inlet-side end surface 43 and a recovery-port-side end surface 44 . The cylindrical main body 42 is cylindrical, has a plurality of slits 41 formed on its outer periphery, and is rotatable. The inlet-side end surface 43 is provided on one axial side of the tubular body 42 , and drain water is introduced into the tubular body 42 . The recovery port side end face 44 is provided on the other side in the axial direction of the tubular main body 42, and the pulp 24 is recovered. Further, the cylindrical main body 42 is inclined so that the end surface 44 on the side of the recovery port is located below the end surface 43 on the side of the introduction port.

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

A drainage introduction pipe 49 is provided on one side of the cylindrical main body 42 . The drainage introduction pipe 49 protrudes into the tubular main body 42 through the inlet-side end face 43 of the tubular main body 42 . The drainage introduction pipe 49 protruding into the cylindrical main body 42 is inclined at the same angle as the inclination of the cylindrical main body 42, that is, so that the tip side is positioned downward. Moreover, the tip side of the drainage introduction pipe 49 is opened downward. Drainage sent from the drainage pit 21 is introduced into the cylindrical main body 42 by the drainage introduction pipe 49 . The cylindrical main body 42 into which the waste water is introduced through the waste water introduction pipe 49 is rotated by the drive mechanism 27, and the waste water is separated into water and pulp. That is, water is discharged from the slits 41 of the tubular body 42 , and the pulp 24 that has not passed through the slits 41 remains in the tubular body 42 .

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

The drive transmission part 53 is wound around the sprockets 54, 54 fixed to the tip parts of the pair of drive shafts 50, 50 penetrating through the front plate part 31, respectively. and a roller chain 56 that transmits the rotational driving force of the motor 52 transmitted to the other drive shaft 50 via the sprockets 54, 54.

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

The rinsing liquid injection section 29 is composed of a rinsing liquid supply pipe 57 and a plurality of injection nozzles 58 provided in the rinsing liquid supply pipe 57 . As shown in FIGS. 4 and 5, the rinse liquid supply pipes 57 are arranged along the axial direction of the tubular body 42 on both sides of the upper portion of the tubular body 42 . A plurality of injection nozzles 58 are provided on these rinse liquid supply pipes 57 at predetermined intervals. These injection nozzles 58 spray the rinsing liquid 28 toward the pulp 24 in the tubular body 42 in a fan-like manner. The rinsing liquid 28 sprayed from the spray nozzle 58 is not limited to water, and may be disinfected water.

Then, the pulp 24 moving to the pulp recovery port 40 side while being separated from the moisture in the drum screen 26 is rinsed by being sprayed with the rinse liquid 28 from the injection nozzles 58 of the rinse liquid injection section 29 . In this case, after rinsing the pulp 24, the rinsing liquid 28 is discharged from the slit 41 into the water receiving tank 30 together with the decomposed water.

The water receiving tank 30 is arranged below the drum screen 26 . This water receiving tank 30 has a wide upper side receiving port 59 opened at the bottom of the drum screen 26, a storage tank 60 provided on the installation surface 37 side, and a drainage provided on the rear plate portion 32 side of the bottom of the storage tank 60. It is formed with a mouth 61 . The water receiving tank 30 is also inclined at the same angle (approximately 5 degrees) as the drum screen 26 , and the decomposed water separated from the waste water and the rinsing liquid 28 jetted from the rinsing liquid jetting section 29 are side, ie, the drain port 61 side of the pulp recovery port 40 side.

Next, a collection procedure for collecting pulp from the used paper diaper 6 will be described. Wastewater introduced into the pulp recovery device 23 is generated by decomposing the used paper diaper 6 by the separator 1 . To disassemble the used paper diapers 6 by the separator 1, the used paper diapers 6 are put into the inner separation tank 4, the inner separation tank 4 is rotated at a predetermined number of revolutions, and the supply pump 16 is operated in this state. Decomposed water is supplied from the decomposed water supply port 15 into the inner separation tank 4 . Along with this, the detergent is supplied into the inner barrel separation tank 4 .

When the decomposition water is supplied into the inner separation tank 4 while rotating the inner separation tank 4, the used paper diaper 6 is soaked with the decomposition water. As a result, the used paper diaper 6 is separated into pulp, plastic, and others. Along with this, the high polymer is decomposed by the water and lime in the decomposing water, and filth (waste water) such as urine absorbed by the high polymer is discharged into the inner barrel separation tank 4 as water.

Therefore, the used paper diaper 6 is separated into pulp dissolved in the decomposing water, filth (moisture) such as urine, plastics, and others. The decomposed water containing pulp and dirt (waste water) is discharged to the discharge pit 21 of the discharge section 19 and temporarily stored. Pulp, plastic, and other materials not dissolved in the decomposition water remain in the inner separation tank 4 as solid matter. Pulp, plastic, and other materials not dissolved in the decomposition water are taken out from the inner separation tank 4, sorted into pulp and plastic, and recovered and reused.

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

The pulp 24 remaining in the drum screen 26 moves toward the pulp recovery port 40 due to its own weight because the drum screen 26 rotates in an inclined state. The rinsing liquid 28 is sprayed from the jet nozzle 58 onto the pulp 24 that has moved toward the pulp recovery port 40 . The rinsing liquid 28 sprayed onto the pulp 24 drops into the water receiving tank 30 after rinsing and cleaning the pulp. While being rinsed with the rinsing liquid 28, the pulp 24 further moves toward the pulp recovery port 40, and is finally taken out from the pulp recovery port 40 and recovered. In this case, the recovered pulp 24 is continuously separated from water from the waste water, rinsed, and dewatered and recovered in the form of a bamboo basket by a rotating drum screen 26 .

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

As described above, in the pulp recovery apparatus 23 of the present embodiment, the pulp contained in the waste water can be recovered by the drum screen 26, so the pulp 24 can be recovered with simple equipment. As a result, the cost for recovering the pulp 24 can be reduced.

In addition, in the pulp recovery device 23 of the present embodiment, the drum screen 26 is tilted so that the pulp 24 separated from moisture in the drum screen 26 moves toward the pulp recovery port 40 by its own weight. A means for moving the recovered pulp to the pulp recovery port 40 side is not required, and the equipment becomes simpler accordingly.

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

In addition, in the pulp recovery device 23 of the present embodiment, two rows of rinsing liquid supply pipes 57 are arranged above the drum screen 26, and a plurality of injection nozzles 58 are arranged in series in these rinsing liquid supply pipes 57. It is As a result, the water coming out of the injection nozzle 58 spreads like a fan, and the rinsing liquid entering the cylindrical body 42 from the slit 41 of the cylindrical body 42 falls on the pulp 24, thereby obtaining a rinsing effect. Note that the rinsing liquid is not limited to clean water and may be disinfected water.

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

The apparatus for treating used sanitary products according to the present invention can be used not only for treating used paper diapers, but also for treating sanitary products that absorb waste such as urine with a high molecular weight polymer, such as sanitary napkins and urinary leakage pads. is also available.

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

Claims (3)

The used sanitary goods (6) are decomposed into a plurality of materials by the decomposed water in the separator (1) into which the used sanitary goods (6) and the decomposed water (7) are fed, and the separated materials are separated from the separator (1). A pulp recovery device (23) for recovering pulp (24) from discharged wastewater,
a housing (25);
It is arranged in the housing (25) in a rotating state, and the wastewater introduced from one side is separated into water and pulp (24), and the pulp (24) moves toward the other side and moves from the other side. a drum screen (26) through which the pulp (24) separated from moisture is collected;
a driving mechanism (27) for rotationally driving the drum screen (26);
a rinsing liquid injection part (29) for injecting a rinsing liquid (28) onto the pulp (24) separated from water from waste water in the drum screen (26);
a water receiving tank (30) provided on the lower side of the drum screen (26) in the housing (25) for receiving the water separated from the pulp and the rinsing liquid (28);
The decomposition water (7) consists of water, lime and a disinfectant,
The wastewater discharged from the separator (1) is once stored in a wastewater pit (21) and filtered, and then introduced from one side into the drum screen (26),
The drum screen (26) comprises a rotatable cylindrical body (42) having a plurality of slits (41) formed on the outer periphery thereof, and one side of the cylindrical body (42) in the axial direction. an inlet-side end face (43) into which the waste water is introduced, a recovery-port-side end face (44) provided on the other axial side of the tubular body (42) and through which the pulp (24) is recovered; consists of
The cylindrical body (42) is formed of a plurality of ring-shaped wedge wires (45) and support rods (46) that fix the wedge wires (45) in multiple stages to form a cylindrical shape, The slit (41) is formed between the wedge wires (45),
The cylindrical main body (42) is inclined with respect to the horizontal so that the recovery port side end surface (44) is positioned below the introduction port side end surface (43). Pulp recovery device (23). 2. Pulp recovery apparatus (23) according to claim 1, characterized in that a cleaning agent is supplied to the separator (1) separately from the cracking water (7). The separator (1) is composed of a housing (2), an outer separation tank (3), an inner separation tank (4), and a decomposition water supply section (5). (5) is a decomposing agent tank (13) storing the decomposing water (7) obtained by mixing a decomposing agent, water, and a disinfectant blended in a predetermined ratio, a detergent tank (14), and decomposing water. a supply port (15), and a supply pump ( 16) and lines (17, 18).

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