JP2009183893A - Method of treating used paper diaper - Google Patents

Method of treating used paper diaper Download PDF

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JP2009183893A
JP2009183893A JP2008027820A JP2008027820A JP2009183893A JP 2009183893 A JP2009183893 A JP 2009183893A JP 2008027820 A JP2008027820 A JP 2008027820A JP 2008027820 A JP2008027820 A JP 2008027820A JP 2009183893 A JP2009183893 A JP 2009183893A
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used paper
washing
paper diaper
paper diapers
separated
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JP5258316B2 (en
Inventor
Isamu Sakata
勇 阪田
Kimihito Sakata
乾仁 阪田
Kimi Okano
公美 岡野
Takuro Kamosawa
卓郎 鴨沢
Shinichi Tochimoto
信一 栃本
Yasunori Akimoto
安紀 秋元
Atsushi Okano
敦 岡野
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SAMUZU KK
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SAMUZU KK
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0286—Cleaning means used for separation
    • B29B2017/0289—Washing the materials in liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of treating used paper diaper which enables separating used paper diaper with high efficiency and recycling the constituent materials. <P>SOLUTION: The method uses a continuous washing machine having two or more water washing machine tubs arranged in series and comprises washing used paper diaper while transferring it in order from a former-stage to a latter-stage tub. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、使用済み紙オムツの処理方法に関する。   The present invention relates to a method for processing used paper diapers.

紙オムツは、パルプなどからなる吸収材と、吸収材が吸収した水分を保持する高分子吸収材（高分子ポリマー）と、これらを包む防水材（プラスチック）などの素材から構成されている。   Paper diapers are composed of an absorbent material made of pulp and the like, a polymer absorbent material (polymer polymer) that retains moisture absorbed by the absorbent material, and a waterproof material (plastic) that encloses these.

従来、使い捨て紙オムツの処分は衛生的な理由から焼却処分が最善とされていたが、水分を多く含んでいるため焼却する際に多量の熱量を必要とし、無駄にエネルギーを消費してしまう。また、資源の有効利用の観点から使用済み紙オムツの構成素材は回収して再利用することが望ましい。   Conventionally, disposal of disposable paper diapers has been best done by incineration for hygienic reasons. However, since they contain a lot of moisture, a large amount of heat is required for incineration, which wastes energy. Moreover, it is desirable to collect and reuse the constituent material of used paper diapers from the viewpoint of effective use of resources.

構成素材の回収方法には、例えば、紙オムツを構成するパルプ等を薬品を用いて分離し、回収して再利用できるようにする分離回収処理がある。この分離回収処理では、前処理として紙オムツを回転する刃などで破砕し、その後の分離や回収を行っていた。（特許文献１）
ところが、この分離回収処理では、使用済み紙オムツを分離処理装置へ投入する際に、投入量の管理が行われていないので投入量が一定せず、投入量が多い場合は消毒液が不足して使用済み紙オムツ全体を均一に消毒することができず、少なければ消毒液が余ってしまい、無駄なコストが掛かる。 As a method for recovering the constituent material, for example, there is a separation and recovery process in which pulp or the like constituting the paper diaper is separated using a chemical, and recovered and reused. In this separation and recovery process, the paper diaper was crushed with a rotating blade or the like as a pre-process, and the subsequent separation and recovery were performed. (Patent Document 1)
However, in this separation and recovery process, when the used paper diaper is thrown into the separation processing apparatus, the amount of charge is not managed, so the amount of charge is not constant. As a result, the entire used disposable diaper cannot be sterilized uniformly.

また、従来、使用済み紙オムツは複数の処理工程を１基の槽で行う１バッチシステムで処理することが多く、１バッチシステムでは１バッチの使用済み紙オムツで全ての工程が終了するまで次のバッチの使用済み紙オムツの処理を開始することができず、従って、処理能率が悪く、多量の使用済み紙オムツを一度に処理することができない。   Also, conventionally, used paper diapers are often processed in a single batch system in which a plurality of processing steps are performed in one tank, and in a single batch system, one batch of used paper diapers is used until all processes are completed. The batch of used paper diapers cannot be started, so the processing efficiency is poor and a large amount of used paper diapers cannot be processed at one time.

また、水分を吸収した使用済み紙オムツ中の高分子吸収材は、重量が増加する上に、ゲル状になって流動性を失い、処理装置の能力を低下させるので、水分を吸収した高分子吸収材は脱水（分解）する必要があり、一般に、この脱水には食塩が有効であることが知られている。さらに、使用済み紙オムツの消毒にも食塩等の添加剤が使用されている。しかし、食塩を用いると、脱水後（分解後）の各素材は残留塩素が多くなり、種々のリサイクル方法にとって不利であり、再資源化されたパルプやプラスチック、固形燃料化したパルプとプラスチックは残留塩素によって質が低下し、特に、固形燃料はボイラー等の燃料に不適である。   In addition, the polymer absorbent in used paper diapers that has absorbed moisture increases in weight and also loses its fluidity in the form of a gel, reducing the ability of the processing equipment. The absorbent material needs to be dehydrated (decomposed), and it is generally known that salt is effective for this dehydration. Furthermore, additives such as salt are also used for disinfecting used paper diapers. However, when salt is used, each material after dehydration (after decomposition) has a large amount of residual chlorine, which is disadvantageous for various recycling methods. Recycled pulp and plastic, solid fueled pulp and plastic remain. The quality is deteriorated by chlorine. In particular, solid fuel is unsuitable for fuels such as boilers.

また、従来、使用済み紙オムツの構成素材であるパルプと高分子吸収材とプラスチックはそれぞれの比重の差を利用し水中で沈殿させて分別しているが、この沈殿分別法では各素材が水中で沈殿層を形成するまで待つ必要があり、それだけ時間が掛かって分別効率が悪い上に、比重差だけでは各素材を正確に分別することができず、例えば、高分子吸収材が残留しているとプラスチックとパルプに付着し、これらを固形燃料化するのが困難である。
特開２００２−２７３７３１号公報 Conventionally, pulp, polymer absorbent, and plastic, which are constituent materials of used paper diapers, are separated and separated in water using the difference in specific gravity. In this precipitation separation method, each material is submerged in water. It is necessary to wait until a precipitate layer is formed, and it takes much time and the separation efficiency is poor. Further, each material cannot be accurately separated only by the difference in specific gravity, for example, a polymer absorbent material remains. It adheres to plastic and pulp and it is difficult to convert them into solid fuel.
JP 2002-273731 A

そこで本願発明は、上記課題を解決し、使用済み紙オムツの構成素材を高能率で分離し、効率よく再利用することを可能にする使用済み紙オムツの処理方法を提供することにある。   SUMMARY OF THE INVENTION Accordingly, the present invention is to provide a processing method for used paper diapers that solves the above-mentioned problems and enables the constituent materials of used paper diapers to be efficiently separated and reused efficiently.

請求項１記載の発明は、直列に配置された複数基の水洗槽を有する連続洗濯機を用い、使用済み紙オムツを前段の水洗槽から後段の水洗槽へ順次移動させながら水洗することを特徴とする使用済み紙オムツの処理方法である。   The invention according to claim 1 is characterized by using a continuous washing machine having a plurality of water washing tubs arranged in series and washing the used paper diapers while sequentially moving the used paper diaper from the preceding water washing tub to the subsequent water washing tub. This is a processing method of used paper diapers.

請求項２記載の発明は、洗濯された前記使用済み紙オムツ中の高分子吸収材を、石灰を用いて脱水することを特徴とする請求項１に記載の使用済み紙オムツの処理方法である。   Invention of Claim 2 is a processing method of the used paper diaper of Claim 1 which dehydrates the polymer absorbent in the used paper diaper which was washed using lime. .

請求項３記載の発明は、前記水洗槽に投入される所定量の使用済み紙オムツに対する前記石灰の割合が、３重量％〜１０重量％の範囲内であることを特徴とする請求項２に記載の使用済み紙オムツの処理方法である。   The invention according to claim 3 is characterized in that the ratio of the lime to the predetermined amount of used paper diaper put into the washing tub is in the range of 3 wt% to 10 wt%. It is a processing method of used paper diaper described.

請求項４記載の発明は、使用済み紙オムツを前記水洗槽で揺すり洗い、あるいは、叩き洗いして構成素材を分離させることを特徴とする請求項１〜請求項３に記載の使用済み紙オムツの処理方法である。   The invention according to claim 4 is characterized in that the used paper diaper is washed in the water-washing tank or is washed to separate the constituent materials. It is a processing method.

請求項５記載の発明は、前記水洗槽で分離した粒度の異なる前記構成素材を、スクリーンを通して排出することにより分別することを特徴とする請求項４に記載の使用済み紙オムツの処理方法である。   The invention according to claim 5 is the processing method of used paper diapers according to claim 4, wherein the constituent materials having different particle sizes separated in the washing tank are separated by being discharged through a screen. .

請求項６記載の発明は、前記水洗槽による水洗工程は、投入された使用済み紙オムツを予備洗浄する予洗工程と、予備洗浄された使用済み紙オムツを本洗浄する本洗工程と、本洗浄された使用済み紙オムツをすすぎ洗いするすすぎ工程とからなることを特徴とする請求項１〜請求項５に記載の使用済み紙オムツの処理方法である。   In the invention according to claim 6, the water washing step by the water washing tank includes a pre-washing step for pre-washing the used used paper diaper, a main washing step for main washing the pre-washed used paper diaper, and a main washing The used paper diaper processing method according to claim 1, further comprising a rinsing step of rinsing the used paper diaper.

請求項７記載の発明は、前記水洗工程で分別された後、脱水し、乾燥させた前記構成素材中のパルプとプラスチックを固形燃料化する固形燃料化工程を備えていることを特徴とする請求項１〜請求項６に記載の使用済み紙オムツの処理方法である。   The invention according to claim 7 includes a solid fuel conversion step of converting the pulp and plastic in the constituent material which has been dehydrated and dried after being separated in the water washing step into a solid fuel. It is a processing method of the used paper diaper of Claims 1-6.

請求項１記載の発明によれば、前段の水洗槽から後段の水洗槽へ順次移動させながら使用済み紙オムツを水洗する連続洗濯機を用いることにより、全ての工程が終了するまで次の使用済み紙オムツの処理を開始することができない１バッチシステムと異なって、使用済み紙オムツを連続的に投入し、効率よく処理することができる。   According to the invention described in claim 1, by using a continuous washing machine for washing used paper diapers while sequentially moving from the preceding water washing tank to the subsequent water washing tank, the next used is completed until all processes are completed. Unlike a one-batch system in which processing of paper diapers cannot be started, used paper diapers can be continuously charged and processed efficiently.

また、複数の水洗槽で使用済み紙オムツを連続的に水洗する本発明では、使用済み紙オムツの投入量を所定量に管理することに大きな意味があり、投入量を管理すれば、消毒液の無駄を防止しながら、使用済み紙オムツを均一に効果的に消毒することが可能になる。   Further, in the present invention in which used paper diapers are continuously washed in a plurality of washing tanks, it is significant to manage the input amount of used paper diapers to a predetermined amount. This makes it possible to disinfect used paper diapers uniformly and effectively.

また、処理システムの処理能力に応じて使用済み紙オムツの投入量を管理すれば、処理システムの処理効率が向上し、吸収材と高分子吸収材と防水材などの分離をスムーズに行うことができる。   In addition, if the amount of used disposable diapers is managed according to the processing capacity of the processing system, the processing efficiency of the processing system can be improved, and the absorbent material, polymer absorbent material, waterproof material, etc. can be separated smoothly. it can.

請求項２記載の発明によれば、請求項１の構成と同等の効果が得られる。   According to the invention described in claim 2, the same effect as that of the structure of claim 1 can be obtained.

また、水分を吸収した使用済み紙オムツ中の高分子吸収材を石灰で脱水することにより、高分子吸収材が軽量化されると共に、ゲル状から元の状態に戻って流動性を回復するので、処理システムの処理能力低下が避けられる。   Also, by dehydrating the polymer absorbent in the used paper diaper that has absorbed moisture with lime, the polymer absorbent is reduced in weight, and the fluidity is restored from the gel state to the original state. , A reduction in processing capacity of the processing system is avoided.

また、脱水に食塩を用いる方法と異なって、種々のリサイクル方法、再資源化されたパルプ及びプラスチックなどの素材、パルプとプラスチックを固形燃料にした物、例えば、この固形燃料はボイラー等の燃料に適切である。   Different from the method using salt for dehydration, various recycling methods, recycled materials such as pulp and plastic, pulp and plastic as solid fuel, for example, this solid fuel is used as fuel for boilers, etc. Is appropriate.

また、石灰が水と反応するときの反応熱によって水洗槽の温度が適度に上昇し、石灰による高分子吸収材の脱水分解能力と、使用済み紙オムツの水洗効果と、素材の分離効率と、消毒液の効果などがそれぞれ促進される。   In addition, the temperature of the washing tank rises moderately due to the reaction heat when lime reacts with water, the dehydration and decomposition ability of the polymer absorbent with lime, the washing effect of used paper diapers, the separation efficiency of the material, The effect of the disinfectant is promoted.

さらに、各水洗槽の温度を上げるための熱源の負荷が低減され、従って、ランニングコストがそれだけ低減される。   Furthermore, the load of the heat source for raising the temperature of each washing tank is reduced, and thus the running cost is reduced accordingly.

また、石灰は食塩より安価であり、本発明の方法はそれだけ低コストで実施できる。   Also, lime is less expensive than salt, and the method of the present invention can be implemented at a lower cost.

請求項３記載の発明によれば、請求項２の構成と同等の効果が得られる。   According to the third aspect of the invention, the same effect as that of the second aspect of the invention can be obtained.

また、使用済み紙オムツの所定投入量に対する石灰の適正な割合（３重量％〜１０重量％）を規定したことによって、石灰が少なすぎると高分子吸収材がゲル状で残留する問題と、石灰が多すぎるとパルプなどの分離された素材に灰分が付着して質を低下させる問題が防止される。   In addition, by defining an appropriate ratio (3 wt% to 10 wt%) of lime with respect to a predetermined input amount of used paper diaper, if the amount of lime is too small, the polymer absorbent material remains in a gel state, and lime If there is too much, the problem which ash will adhere to the isolate | separated raw materials, such as a pulp, and the quality will be prevented is prevented.

請求項４記載の発明によれば、請求項１〜請求項３の構成と同等の効果が得られる。   According to invention of Claim 4, the effect equivalent to the structure of Claims 1-3 is acquired.

また、使用済み紙オムツを連続洗濯機で連続的に揺すり洗い、あるいは、叩き洗いして構成素材を分離させるので、従来例と異なり、前処理として紙オムツを回転刃で破砕する必要がなく、それだけ低コストに実施できる。   Also, because the used diapers are continuously shaken or washed with a continuous washing machine to separate the constituent materials, unlike conventional examples, there is no need to crush the paper diapers with a rotary blade as a pretreatment, This can be done at low cost.

請求項５記載の発明によれば、請求項４の構成と同等の効果が得られる。   According to the fifth aspect of the invention, the same effect as that of the fourth aspect of the invention can be obtained.

また、水洗槽で分離した粒度の異なる構成素材（パルプと高分子吸収材とプラスチックなど）をスクリーンを通して排出し分別するので、これらを水中で沈殿させて分別する従来例と異なって、分別時間が大きく短縮される上に、各素材を正確に分別することができ、例えば、残留した高分子吸収材の付着が防止されてプラスチックとパルプの固形燃料化が容易になる。   Also, because the constituent materials with different particle sizes (pulp, polymer absorbent and plastic, etc.) separated in the washing tank are discharged through the screen and separated, the separation time differs from the conventional example in which they are precipitated and separated in water. In addition to being greatly shortened, each material can be accurately separated. For example, the remaining polymer absorbent is prevented from adhering, and plastic and pulp can be easily converted into a solid fuel.

請求項６記載の発明によれば、請求項１〜請求項５の構成と同等の効果が得られる。   According to invention of Claim 6, the effect equivalent to the structure of Claims 1-5 is acquired.

また、使用済み紙オムツを、予洗工程と本洗工程とすすぎ工程とによって連続的に処理するので、処理時間が短縮されて処理能力が増加し、使用済み紙オムツを大量に処理することが可能になる。   In addition, since used paper diapers are continuously processed through the pre-washing process, the main washing process and the rinsing process, the processing time is shortened and the processing capacity is increased, and a large amount of used paper diapers can be processed. become.

また、予洗、本洗、すすぎ洗いの各工程によって、水分を吸収した高分子吸収材をほぼ完全に分離させることができる。   In addition, the polymer absorbent material that has absorbed moisture can be almost completely separated by the steps of prewashing, main washing, and rinsing.

請求項７記載の発明によれば、請求項１〜請求項６の構成と同等の効果が得られる。   According to invention of Claim 7, the effect equivalent to the structure of Claims 1-6 is acquired.

また、上記のように、食塩を使用しない本発明の方法では、使用済み紙オムツから分別されて再資源化された素材に残留する塩素分が極めて少ない。   Further, as described above, in the method of the present invention in which no salt is used, the chlorine content remaining in the material separated and recycled from the used paper diaper is extremely small.

また、プラスチックはカロリーもＡ重油並みに高く、固形燃料にすれば利用価値が高い上に、水分を吸収した高分子吸収材が上記の水洗工程によって分離されているので、固形燃料化が容易である。   In addition, plastic has a high calorie as high as heavy oil A. If it is made into a solid fuel, its utility value is high. In addition, the polymer absorbent that has absorbed moisture is separated by the washing process described above, so that it can be easily converted into a solid fuel. is there.

本願発明の一実施例を図１を参照しながら説明する。   An embodiment of the present invention will be described with reference to FIG.

図１は使用済み紙オムツの再資源化システム（使用済み紙オムツの処理方法）の工程図である。   FIG. 1 is a process diagram of a used paper diaper recycling system (used paper diaper processing method).

この再資源化システムは、連続洗濯機１０１と脱水機１０３と乾燥機１０５とを備えており、連続洗濯機１０１は、直列に配置された１基の予洗槽と８基の本洗槽と２基のすすぎ洗い槽を備えている。また、これらの予洗槽と本洗槽とすすぎ洗い槽は２種類の回転数と２種類の揺動角度でそれぞれの洗い工程を行える。   This recycling system includes a continuous washing machine 101, a dehydrator 103, and a dryer 105. The continuous washing machine 101 includes one prewash tank, eight main wash tanks, two A basic rinsing bath is provided. Further, these pre-washing tank, main washing tank and rinsing washing tank can perform respective washing steps at two kinds of rotation speeds and two kinds of swing angles.

また、紙オムツは、上記のように、排泄物を吸収する吸収材と、その水分を保持する高分子吸収材と、これらを包む防水材及び表面材とから構成されており、吸収材は綿状パルプや吸収紙などから構成され、高分子吸収材は高分子ポリマーであり、防水材はポリエチレンフィルム、ポリエチレンラミネート、ポリウレタンラミネートのような素材の不織布で構成され、表面材はポリオレフィン系、ポリプロピレン系、ポリエチレン系、ポリエステル系のような素材の不織布で構成されている。   In addition, as described above, a paper diaper is composed of an absorbent material that absorbs excrement, a polymer absorbent material that retains its moisture, and a waterproof material and a surface material that wrap them, and the absorbent material is cotton. The polymer absorbent material is a polymer polymer, the waterproof material is composed of a nonwoven fabric such as polyethylene film, polyethylene laminate, polyurethane laminate, and the surface material is polyolefin-based or polypropylene-based. It is made of a nonwoven fabric made of a material such as polyethylene or polyester.

また、再資源化された使用済み紙オムツの素材は、固形燃料にするためには可燃分が多く含まれて発熱量が大きいことが望ましく、水分と用途のない灰分は少ない程よい。また、固形燃料の場合、大きい発熱量を得るために炭素は多い程よく、ダイオキシンを発生させたり、設備を腐食させる塩素は少ない程よく、大気中に放出する硫黄は少ない程よい。   In addition, it is desirable that the recycled used disposable diaper material contains a large amount of combustible matter and has a large calorific value in order to make it into a solid fuel. In the case of a solid fuel, in order to obtain a large calorific value, the more carbon, the better the less chlorine that generates dioxins or corrodes the equipment, and the less the sulfur released into the atmosphere.

（使用済み紙オムツの再資源化工程の説明）
（Ａ）投入管理工程１では、一定量（所定量）の使用済み紙オムツを水溶性容器（バッグ）に収容して投入口から投入する。この投入管理工程１では、例えぱ、水溶性容器を１２０秒に１回のサイクルで投入し、このサイクルで使用済み紙オムツを連続処理する。 (Description of recycling process of used paper diapers)
(A) In the input management step 1, a certain amount (predetermined amount) of used paper diaper is accommodated in a water-soluble container (bag) and input from an input port. In this charging management process 1, for example, a water-soluble container is charged in a cycle of once every 120 seconds, and used paper diapers are continuously processed in this cycle.

水洗工程は、１基の予洗槽で行われる予洗工程２と、８基の本洗槽で行われる本洗工程３と、２基のすすぎ洗い槽で行われるすすぎ洗い工程４から構成されている。   The water washing process is composed of a pre-washing process 2 performed in one pre-washing tank, a main-washing process 3 performed in eight main-washing tanks, and a rinsing process 4 performed in two rinsing tanks. .

（Ｂ）予洗工程２では、投入管理工程１で投入された１容器分の使用済み紙オムツを予備洗いすると共に、１次消毒のために次亜塩酸が投入される。予備洗いによって水溶性容器の口元が溶け、使用済み紙オムツが下洗いされ、１次消毒されると共に、水分を吸収した高分子ポリマーが分離される。   (B) In the pre-washing step 2, the used paper diaper for one container put in the loading management step 1 is pre-washed, and hypochlorous acid is put for primary disinfection. The mouth of the water-soluble container is melted by the pre-washing, and the used paper diaper is washed down and primarily disinfected, and the polymer polymer that has absorbed moisture is separated.

（Ｃ）本洗工程３では、予備洗いされた使用済み紙オムツを、８基の本洗槽の間で前段の本洗槽（水洗槽）から後段へ順次移動させながら、８０℃以上で、合計１０分以上の洗濯と２次消毒とが行われると共に、水分を吸収した高分子ポリマーが分離される。   (C) In the main washing step 3, while the pre-washed used paper diaper is sequentially moved from the main washing tank (water washing tank) to the subsequent stage among the eight main washing tanks, at 80 ° C. or higher, Washing for a total of 10 minutes or more and secondary disinfection are performed, and the polymer that has absorbed moisture is separated.

（Ｄ）すすぎ洗い工程４では、予洗工程２と本洗工程３で付着した次亜塩酸の塩素分を使用済み紙オムツから除去すると共に、水分を吸収した高分子ポリマーが分離される。   (D) In the rinsing step 4, the chlorine content of hypochlorous acid adhering in the pre-washing step 2 and the main washing step 3 is removed from the used paper diaper, and the high-molecular polymer that has absorbed moisture is separated.

（Ｅ）また、予洗工程２と本洗工程３とすすぎ洗い工程４では各水洗槽に、処理中の使用済み紙オムツに対して５重量％の生石灰（ＣａＯ）が投入され、投入された生石灰は高分子ポリマーを脱水（分解）する。   (E) In addition, in the pre-washing step 2, the main washing step 3 and the rinsing step 4, 5% by weight of quick lime (CaO) is charged into each water washing tank with respect to the used paper diaper being processed. Dehydrates (decomposes) a polymer.

また、投入された生石灰が水と反応することによって反応熱が発生する。   In addition, reaction heat is generated by the quick calcined lime reacting with water.

（Ｆ）また、予洗工程２と本洗工程３とすすぎ洗い工程４では、各水洗槽で使用済み紙オムツを揺すり洗い、あるいは、叩き洗いして、吸収材と高分子ポリマーと防水材と表面材をそれぞれ構成素材に分離する。   (F) Further, in the pre-washing step 2, the main washing step 3 and the rinsing step 4, the used paper diaper is shaken or washed in each water washing tank, and the absorbent material, the polymer polymer, the waterproof material and the surface are washed. Each material is separated into constituent materials.

（Ｇ）また、予洗工程２と本洗工程３とすすぎ洗い工程４の各水洗槽には、それぞれ所定の網目（０．３ｍｍ〜０．５ｍｍ）を有するスクリーン（篩）が取り付けられた排出孔が設けられており、各排出孔はスクリーンのそれぞれの網目によって上記のように分離した各構成素材を排出し、分別する。   (G) Moreover, each water-washing tank of the pre-washing process 2, the main washing process 3, and the rinsing process 4 is a discharge hole in which a screen (screen) having a predetermined mesh (0.3 mm to 0.5 mm) is attached. Each discharge hole discharges and separates the constituent materials separated as described above by the respective meshes of the screen.

（Ｈ）脱水工程５では、すすぎ洗いされた使用済み紙オムツの水分を脱水機１０３で除去する。また、脱水された水分からも高分子ポリマーが分離される。   (H) In the dehydration step 5, the dewatering machine 103 removes moisture from the rinsed used paper diaper. In addition, the polymer is separated from the dehydrated water.

（Ｉ）乾燥工程６では、高分子ポリマーが分離され除去された後の、吸収材（綿状パルプと吸収紙）と防水材及び表面材（プラスチック）から乾燥機１０５によって水分をさらに除去し、乾燥させる。   (I) In the drying step 6, after the polymer is separated and removed, moisture is further removed by the dryer 105 from the absorbent material (cotton pulp and absorbent paper), the waterproof material and the surface material (plastic), dry.

（Ｊ）パルプ等回収／再利用工程７では、上記各工程で分離、分別された高分子ポリマーを回収し、再利用可能な状態にする。   (J) In the recovery / reuse step 7 for pulp and the like, the polymer polymer separated and separated in each of the above steps is recovered and made into a reusable state.

なお、上記工程の中で脱水工程５はなくても良く、すすぎ洗い工程４の後に直ぐに乾燥工程６としても良い。   The dehydration step 5 may not be included in the above steps, and the drying step 6 may be performed immediately after the rinsing step 4.

また、パルプ等回収／再利用工程７の後に脱水工程５を設けて、パルプ〔繊維質〕を回収し再生利用しても良く、脱す工程５の後に乾燥工程（点線で示す）６を設けても良い。   Further, a dehydration step 5 may be provided after the pulp recovery / reuse step 7 to recover and recycle the pulp [fibrous], and a drying step (shown by a dotted line) 6 may be provided after the removal step 5. Also good.

（Ｋ）固形燃料化工程８では、乾燥工程６で水分が除去され乾燥された綿状パルプと吸収紙とプラスチックを固形燃料にする。なお、これらの素材を固形燃料に圧縮成形する際に圧縮による８０℃以上の摩擦熱が発生し、水分除去効果及び消毒効果が得られる。また、回収したプラスチックは油化してもよい。   (K) In the solid fuel conversion step 8, the flocculent pulp, the absorbent paper, and the plastic that have been dried in the drying step 6 and dried are used as the solid fuel. In addition, when these materials are compression-molded into solid fuel, frictional heat of 80 ° C. or higher due to compression is generated, and a moisture removal effect and a disinfection effect are obtained. The recovered plastic may be oiled.

さらに、回収したプラスチックは、固形燃料化、油化以外に再び再生プラスチックとして再利用することができる。   Further, the recovered plastic can be reused as recycled plastic in addition to solid fuel and oil.

なお、この再資源化システムでは、例えば、８０kgの使用済み紙オムツを投入すると、この使用済み紙オムツは脱水工程後に投入量の１０%である８kgになり、乾燥工程後は投入量の６%である約５kgにまで軽量化される。   In this recycling system, for example, when 80 kg of used paper diaper is input, this used paper diaper becomes 8 kg, which is 10% of the input amount after the dehydration process, and 6% of the input amount after the drying process. The weight is reduced to about 5kg.

また、上記固形燃料の塩素含有率は０．０３％以下であり、極めて良好な結果が得られている。   Further, the chlorine content of the solid fuel is 0.03% or less, and a very good result is obtained.

［使用済み紙オムツの再資源化システムの効果］
上記のように構成された再資源化システムは、連続洗濯機を用いることにより、１バッチシステムと異なって、使用済み紙オムツを連続的に効率よく処理できる。 [Effect of recycling system for used paper diapers]
Unlike the one-batch system, the recycling system configured as described above can efficiently and continuously process used paper diapers by using a continuous washing machine.

また、使用済み紙オムツを連続的に水洗する本発明によって、使用済み紙オムツの投入量を所定量に管理することに大きな意味が生じ、投入量を管理することによって、システムの処理効率が向上し、吸収材と高分子吸収材と防水材と表面材などの分離がスムーズに行われると共に、消毒液の無駄を防止しながら、使用済み紙オムツを均一に効果的に消毒することが可能になる。   In addition, the present invention in which used paper diapers are continuously washed with water has a great meaning in managing the amount of used paper diaper input to a predetermined amount, and the processing efficiency of the system is improved by managing the amount of input. In addition, the absorbent material, polymer absorbent material, waterproof material, surface material, etc. can be separated smoothly, and it is possible to disinfect used paper diapers uniformly and effectively, while preventing waste of the disinfectant. Become.

また、生石灰で脱水することによって高分子吸収材（高分子ポリマー）が軽量化され、ゲル状から元の状態に戻って流動性を回復するので、システムの処理能力低下が避けられる。   Further, dehydration with quick lime reduces the weight of the polymer absorbent (polymer) and restores the fluidity from the gel state to the original state, thereby avoiding a reduction in processing capacity of the system.

また、高分子ポリマーの脱水に食塩を用いないので、種々のリサイクル方法、再資源化されたパルプやプラスチックなどの素材、パルプとプラスチックを固形燃料にした物、油化したプラスチックなどが残留塩素の害から解放され、固形燃料はボイラー等の燃料に適切である。   In addition, since salt is not used to dehydrate the polymer, various recycling methods, recycled pulp and plastic materials, pulp and plastic solid fuel, oiled plastic, etc. Freed from harm, solid fuel is suitable for fuels such as boilers.

また、生石灰と水との反応熱によって各水洗槽で、生石灰による高分子ポリマーの脱水能力と、使用済み紙オムツの水洗効率と、各素材の分離効率と、消毒液の効果などが促進され、さらに、各水洗槽の温度を上げるための熱源の負荷が低減され、従って、ランニングコストがそれだけ低減される。   In addition, the reaction heat of quick lime and water promotes the dehydration ability of the polymer polymer by quick lime, the water washing efficiency of used paper diapers, the separation efficiency of each material, the effect of the disinfectant, etc. Furthermore, the load of the heat source for raising the temperature of each washing tank is reduced, and thus the running cost is reduced accordingly.

また、使用済み紙オムツ（所定投入量）に対する生石灰の適正な割合（３重量％〜１０％）を規定したことによって、生石灰が少なすぎると高分子吸収材がゲル状で残留する問題と、生石灰が多すぎると分離された素材に灰分が付着して質を低下させる問題が防止される。   In addition, by defining an appropriate ratio (3 wt% to 10%) of quicklime with respect to used paper diapers (predetermined input amount), if the amount of quicklime is too small, the polymer absorbent material remains in a gel state, and quicklime When there is too much, the problem that ash will adhere to the isolate | separated raw material and quality will be prevented is prevented.

また、使用済み紙オムツを連続水洗槽で揺すり洗い、あるいは、叩き洗いして構成素材を分離させるので、従来例と異なり、紙オムツを回転刃などで破砕する必要がなく、それだけ低コストに実施できる。   In addition, the used diapers are washed in a continuous water tank or scoured to separate the constituent materials. Unlike conventional examples, there is no need to crush paper diapers with a rotating blade, which is less expensive. it can.

また、粒度の異なる構成素材（パルプと高分子ポリマーとプラスチックなど）をスクリーンを用いて分別するので、これらを沈殿させて分別する従来例と異なり、分別時間が大きく短縮される上に、各素材を正確に分別することができるから、例えば、残留した高分子吸収材の付着が防止され、プラスチックとパルプの固形燃料化が容易になる。   In addition, since the constituent materials with different particle sizes (pulp, polymer polymer, plastic, etc.) are separated using a screen, the separation time is greatly reduced, unlike the conventional example in which these are precipitated and separated. Can be accurately separated, for example, adhesion of the remaining polymer absorbent is prevented, and plastic and pulp can be easily made into a solid fuel.

また、使用済み紙オムツを、予洗工程と本洗工程とすすぎ洗い工程とで連続的に水洗することによって処理時間が短縮され、処理能力が増加するから、大量の使用済み紙オムツを処理することが可能になる。   In addition, because the processing time is shortened and the processing capacity is increased by continuously washing the used paper diaper in the pre-washing process, the main washing process and the rinsing process, a large amount of used paper diapers must be processed. Is possible.

また、予洗、本洗、すすぎ洗いの各工程によって、水分を吸収した高分子ポリマーをほぼ完全に分離させることができる。   Moreover, the polymer polymer which absorbed the water | moisture content can be isolate | separated almost completely by each process of a prewash, a main wash, and a rinse.

また、食塩を使用しない本発明の方法では、使用済み紙オムツから分別され再資源化された素材に残留する塩素分が極めて少ない。   Further, in the method of the present invention in which no salt is used, the chlorine content remaining on the material separated and recycled from the used paper diaper is extremely small.

また、プラスチックはカロリーもＡ重油並みに高いので、固形燃料としての利用価値が高く、水分を吸収した高分子ポリマーが上記の水洗工程によって分離されているので、その後の固形燃料化が容易である。   In addition, since the plastic has a high calorie as high as A heavy oil, it is highly useful as a solid fuel, and the polymer polymer that has absorbed moisture is separated by the water washing step, so that subsequent solid fuel conversion is easy. .

［本発明の範囲に含まれる他の態様］
以上、実施形態について説明したが、本願発明はこれに限定されるものではなく、処理方法の要旨に付随する各種の変更が可能である。 [Other Embodiments Included within the Scope of the Present Invention]
Although the embodiment has been described above, the present invention is not limited to this, and various modifications accompanying the gist of the processing method are possible.

一実施例の使用済み紙オムツの処理方法を示す工程図である。It is process drawing which shows the processing method of the used paper diaper of one Example.

符号の説明Explanation of symbols

１０１ 連続洗濯機 101 Continuous washing machine

Claims (7)

直列に配置された複数基の水洗槽を有する連続洗濯機を用い、使用済み紙オムツを前段の水洗槽から後段の水洗槽へ順次移動させながら水洗することを特徴とする使用済み紙オムツの処理方法。   Disposal of used paper diapers characterized by using a continuous washing machine having a plurality of water washing tubs arranged in series, and sequentially washing the used paper diapers from the preceding water washing tub to the subsequent water washing tub Method. 洗濯された前記使用済み紙オムツ中の高分子吸収材を、石灰を用いて脱水することを特徴とする請求項１に記載の使用済み紙オムツの処理方法。   The method for treating used paper diapers according to claim 1, wherein the polymer absorbent material in the used used paper diapers is dehydrated using lime. 前記水洗槽に投入される所定量の使用済み紙オムツに対する前記石灰の割合が、３重量％〜１０重量％の範囲内であることを特徴とする請求項２に記載の使用済み紙オムツの処理方法。   The processing of used paper diapers according to claim 2, wherein a ratio of the lime to a predetermined amount of used paper diapers put into the washing tub is within a range of 3 wt% to 10 wt%. Method. 使用済み紙オムツを前記水洗槽で揺すり洗い、あるいは、叩き洗いして構成素材を分離させることを特徴とする請求項１〜請求項３に記載の使用済み紙オムツの処理方法。   The used paper diaper processing method according to claim 1, wherein the constituent material is separated by shaking or tapping the used paper diaper in the washing tank. 前記水洗槽で分離した粒度の異なる前記構成素材を、スクリーンを通して排出することにより分別することを特徴とする請求項４に記載の使用済み紙オムツの処理方法。   The processing method of used paper diapers according to claim 4, wherein the constituent materials having different particle sizes separated in the washing tank are separated by being discharged through a screen. 前記水洗槽による水洗工程は、投入された使用済み紙オムツを予備洗浄する予洗工程と、予備洗浄された使用済み紙オムツを本洗浄する本洗工程と、本洗浄された使用済み紙オムツをすすぎ洗いするすすぎ工程とからなることを特徴とする請求項１〜請求項５に記載の使用済み紙オムツの処理方法。   The washing step by the washing tank includes a pre-washing step for pre-washing the used paper diaper that has been charged, a main-washing step for main-washing the pre-washed used paper diaper, and rinsing the used-washed paper diaper. The used paper diaper processing method according to claim 1, further comprising a rinsing step of washing. 前記水洗工程で分別された後、脱水し、乾燥させた前記構成素材中のパルプとプラスチックを固形燃料化する固形燃料化工程を備えていることを特徴とする請求項１〜請求項６に記載の使用済み紙オムツの処理方法。   The solid fuel conversion process of converting into solid fuel the pulp and the plastic in the said component raw material which were dehydrated and dried after fractionating by the said water-washing process is provided. Of used paper diapers.
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WO2014168179A1 (en) * 2013-04-10 2014-10-16 ユニ・チャーム株式会社 Method for recovering pulp fiber from used sanitary products, and regenerated pulp obtained using said method
WO2015064209A1 (en) * 2013-10-30 2015-05-07 ユニ・チャーム株式会社 Process for manufacturing recycled pulp from used sanitary goods
WO2015190140A1 (en) * 2014-06-12 2015-12-17 ユニ・チャーム株式会社 Method for manufacturing recycled pulp from used sanitary products
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