JP2004042038A

JP2004042038A - Method for recovering raw material from sanitary goods adhered with soil

Info

Publication number: JP2004042038A
Application number: JP2003148439A
Authority: JP
Inventors: Hiroshi Ito; 伊藤　博
Original assignee: Daiki Co Ltd
Current assignee: Daiki Co Ltd
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2004-02-12
Anticipated expiration: 2020-04-28
Also published as: JP4340721B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for sanitarily recovering raw materials from sanitary goods adhered with soil by disinfecting or sterilizing colitis germs and other various germs adhering to the sanitary goods containing highly water absorbing resin gelling by having absorbed water. <P>SOLUTION: The method for recovering the raw materials from the sanitary goods is characterized in that the sanitary goods containing highly water absorbing resin gelling by having absorbed water are crushed in the presence of a disinfectant, and the crushed sanitary goods are dispersed in water containing a disinfectant and are decomposed to its individual raw materials to separate the crushed sanitary goods from a portion of the soil adhering to the sanitary goods, and that the crushed sanitary goods are next dispersed in boiling water to further decompose the sanitary goods to its individual raw materials and to separate the crushed sanitary goods from a portion of the residual soil adhering to the sanitary goods. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【産業上の利用分野】
本発明は、汚れた衛生用品からその素材の回収方法に関し、特に、製造時に汚れた衛生用品及び使用済みの衛生用品から、その素材を再使用可能に回収する素材の回収方法に関する。また、本発明は、汚れた衛生用品から再使用可能な衛生用品用の素材を回収する衛生用品素材の回収方法に関し、特に、使用済みの衛生用品から、衛生的な衛生用品素材の回収方法に関する。
【０００２】
【従来の技術】
紙おむつ、乳パッド、尿パッド及び生理用ナプキンなどの衛生用品は、使い捨て可能に製造されている。このような使い捨て衛生用品は、二つの吸水紙で形成された層の間に、高吸水性樹脂を含むパルプ材料で形成されている吸水層部を設け、一方の吸水紙の層の下側に不透水性のプラスチック膜を設け、他方の吸水紙の上に不織布を設けて形成されている。
この使い捨て衛生用品は、繰り返し使用するために、洗濯により清潔にとなく使用後に廃棄できるので便利であり、病院や家庭で使用されている。
【０００３】
【発明が解決しようとする課題】
このような使い捨ての衛生用品であっても、使用目的から衛生的であることが要求され、製造過程で汚れただけで廃棄されて、焼却されている。その量は、全体的には僅かであっても、全体量が多いために、焼却処理される量は無視できるものではなく問題とされている。このような衛生用品は、衛生的であることが要求されるために、再生が難しく、これまでに、再生することすら話題に上っていない。殊に、使用後の所謂使用済みおむつは、大便や小便で汚れており、その処理は、専ら、焼却によっている。使用済み紙おむつの量は膨大であり、しかも、使用済み紙おむつの廃棄処理費は、例えば、１ｋｇ当たり１００乃至１６０円であるから、大変な額に上っており、問題とされている。しかも、焼却処理には、大量の燃料及び多くの人手等を要するために問題とされている。
本発明は、このような汚れた衛生用品の再生処理に係る問題点を解決することを目的としている。
【０００４】
【課題を解決するための手段】
本発明は、以上の問題点を解決するために、汚れた衛生用品に付着する大腸菌やその他雑菌を、消毒又は滅菌して、衛生的な素材を回収することを目的とする。
本発明者は、消毒液で濡れた汚れた衛生用品を粉砕（即ち、破砕若しくは粉砕）して、消毒液中で撹拌処理する過程で、衛生用品の素材から汚れが分離され、又は汚れた素材が分離され得ることを発見して本発明に至った。
【０００５】
即ち、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を粉砕し、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、衛生用品に付着していた汚れの一部を前記衛生用品の粉砕物から分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、また、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を粉砕し、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、衛生用品に付着していた汚れの一部を前記衛生用品の粉砕物から分離し、次いで、衛生用品に付着していた汚れの一部が分離された前記衛生用品の粉砕物を熱湯中に分散させて、前記衛生用品に付着していた汚れの残りの中の一部を該衛生用品の粉砕物から分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、さらに、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に粉砕して、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、衛生用品の粉砕物の個々の素材に解して、衛生用品に付着していた汚れの一部を前記衛生用品粉砕物から分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、さらにまた、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に粉砕して、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を、その個々の素材に解して、該衛生用品に付着していた汚れの一部を該衛生用品の粉砕物から分離し、次いで、前記衛生用品の粉砕物を熱湯中に分散させて、該衛生用品の粉砕物を、衛生用品の粉砕物の個々の素材にさらに解して、前記衛生用品に付着していた汚れの残りの中の一部を該衛生用品の粉砕物から分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、さらに加えて、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕して、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を、その個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、以上の他にさらに、本発明は、吸水してゲル状となっている高吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を、その個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離し、次いで、この濾過残渣を熱湯中に分散させて、前記衛生用品の粉砕物の素材を含む熱湯懸濁液を形成し、この熱湯懸濁液を濾過して、前記衛生用品に付着していた汚れの残りの中の一部を該衛生用品の粉砕物から分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にある。
【０００６】
そしてまた、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を、その個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を、濾材の細孔の開きが１ｍｍ以下の濾材で濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離することを特徴とする吸水してゲル状となっている高吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、また、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を、消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を、その個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を、細孔の開きが１ｍｍ以下の濾材で濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離し、次いでこの濾過残渣を熱湯中に分散させて、該衛生用品の粉砕物の素材を含む熱湯懸濁液を形成し、この熱湯懸濁液を、濾材の細孔の開きが１ｍｍ以下の濾材で濾過して、前記衛生用品に付着していた汚れの残りの中の一部を該衛生用品の粉砕物から分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、さらに、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を、消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物をその個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を、細孔の開きが１ｍｍ以下の濾材で濾過して、衛生用品に付着している汚れの一部を、衛生用品の粉砕物の素材と分離し、次いでこの濾過残渣を、孔径が５乃至１０ｍｍの篩で消毒剤溶液の噴霧下に篩分けして、パルプ材料及び吸水性樹脂を主として含有する衛生用品の粉砕物の篩分け産物と、プラスチック物質を主として含有する衛生用品の粉砕物の篩分け産物とを分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、さらにまた、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を、消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物をその個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を、細孔の開きが１ｍｍ以下の濾材で濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離し、次いで濾過残渣の衛生用品の粉砕物の素材を熱湯中に分散させて、該衛生用品の粉砕物の素材を含む熱湯懸濁液を形成し、この熱湯懸濁液を、濾材の細孔の開きが１ｍｍ以下の濾材で濾過して、前記衛生用品に付着していた汚れの残りの中の一部を該衛生用品の粉砕物から分離し、この熱湯懸濁液の濾過残渣を、孔径の５乃至１０ｍｍの篩で消毒剤溶液の噴霧下に篩分けして、パルプ材料及び吸水性樹脂を主として含有する衛生用品の粉砕物の篩分け産物と、プラスチック物質を主として含有する衛生用品の粉砕物の篩分け産物とを分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、さらに加えて、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を、消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を素材に個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を濾材の細孔の開きが１ｍｍ以下の濾材で濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離し、この濾過残渣を、篩の目の開きが５乃至１０ｍｍの篩で抗菌剤溶液の噴霧下に粒度分離して、パルプ材料及び吸水性樹脂を主として含有する篩分け産物と、プラスチック物質を主として含有する篩分け産物とに分け、次いで、パルプ材料及び吸水性樹脂を主として含有する篩分け産物を乾燥して、得られた乾燥物を乾式分級して、パルプ含有量が大きい分級産物と、前記分級産物よりパルプの含有量が少ない分級産物とに分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からのその素材の回収方法にあり、また、以上の他に、本発明は、吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品を消毒剤の存在下に５０ｍｍ以下の粒度に粉砕し、この粉砕された衛生用品を、消毒剤を含有する水中に分散させて、前記衛生用品の粉砕物を素材に個々の素材に解して、該衛生用品の粉砕物の素材を含む懸濁液を形成し、この懸濁液を濾材の細孔の開きが１ｍｍ以下の濾材で濾過して、衛生用品に付着していた汚れの一部を、衛生用品の粉砕物の素材と分離し、この濾過残渣を熱湯中に分散させて、該衛生用品の粉砕物の素材を含む熱湯懸濁液を形成し、この熱湯懸濁液を、濾材の細孔の開きが１ｍｍ以下の濾材で濾過して、前記衛生用品に付着していた汚れの残りの中の一部を該衛生用品の粉砕物から分離し、熱湯懸濁液の濾過残渣を、篩の目の開きが５乃至１０ｍｍの篩で抗菌剤溶液の噴霧下に粒度分離して、パルプ材料及び吸水性樹脂を主として含有する篩分け産物と、プラスチック物質を主として含有する篩分け産物とに分け、次いで、パルプ材料及び吸水性樹脂を主として含有する篩分け産物を乾燥して、得られた乾燥物を乾式分級して、パルプ含有量が大きい分級産物と、前記分級産物よりパルプの含有量が少ない分級産物とに分離することを特徴とする吸水してゲル状となっている吸水性樹脂を含有する汚れた衛生用品からその素材の回収方法にある。
【０００７】
【発明の実施の形態】
本発明において、汚れた衛生用品の用語は、製造過程、運搬過程及び衛生用品の陳列過程で汚れた衛生用品並びに使用済みの衛生用品を意味する。本発明において、粉砕の用語は、破砕、粗砕、中砕及び裁断を意味する。
本発明において、汚れた衛生用品は、汚れた紙おむつ、汚れた乳パッド、汚れた尿パッド、汚れたシーツ、汚れたガーゼ、汚れた包帯若しくは汚れた脱脂綿又はこれら二以上の衛生用品の組を意味する。本発明において、汚れが付着している衛生用品は、特に、使用済みの紙おむつを意味する。
【０００８】
衛生用品、特に紙おむつや吸水性パッド等の衛生用品は、吸水紙の層の間に、パルプ及び吸水性樹脂で形成されている吸水性層が配置され、底部の吸水紙の層の下側に位置して不透水性のプラスチック材料膜が設けられ、上側の吸水紙の層の上側に位置して透水性のプラスチック材料の不織布が設けられている。使用済みの衛生用品、例えば、使用済みの紙おむつの場合、排泄による大便や糞等の汚れは、主としてプラスチック材料製の不織布の一部に付着し、尿等の体液による汚れは、プラスチック材料製の不織布、吸水性層及びプラスチック材料膜の一部に付着する。また使用済みの尿パッドや乳パッドの場合、汗や尿などの体液による汚れは、主としてプラスチック材料製の不織布の一部、吸水性層の一部及びプラスチック材料膜の一部に付着する。
【０００９】
本発明において、汚れた衛生用品は、粉砕に先立って、消毒剤溶液が噴霧され、消毒剤溶液で濡らされる。消毒剤溶液で濡れた衛生用品は、裁断機又は破砕機に送られ、そこで衛生用品は、５０ｍｍ以下、好ましくは３０ｍｍ以下の大きさに裁断又は破砕される。裁断機又は破砕機により裁断若しくは破砕されたれた衛生用品粉砕物は、汚れた部分と汚れない部分とがあり、分別することが容易となる。
また、本発明において、粉砕された衛生用品粉砕物は、撹拌下の消毒剤溶液中に導入されて、衛生用品を構成する素材に解され、該素材に付着する水溶性の汚れは、その殆どが消毒剤溶液に溶解されて素材から分離され、大便や糞等の固形物の汚れは、撹拌部材の撹拌作用及び消毒剤溶液の撹乱作用により、解され且つ洗われて素材からその殆どを分離することができる。
【００１０】
このように素材から分離された水溶性の汚れは溶解して溶液中に移り、糞等の固形の汚れは、その殆どが細かく分散されて溶液中に分散する。消毒剤溶液中で撹拌処理により、衛生用品の素材は、洗浄され、殺菌処理される。このように処理された衛生用品の素材を分別するために、衛生用品の素材が懸濁されている消毒剤溶液は、例えば０．１乃至１ｍｍの目開きの篩に送られる。消毒剤溶液中での撹拌処理により、衛生用品粉砕物に付着する水溶性の汚れ及び固形物の汚れの殆どは、消毒剤溶液に溶解若しくは懸濁した状態となるから、０．１乃至１ｍｍの目開きの篩又は濾材で分別することにより、衛生用品に付着した水溶性の汚れ及び固形物の汚れの殆どは、篩下又は濾液に含まれることとなり、篩上又は濾過残渣の衛生用品の素材と分離される。このように分離された衛生用品の素材は、さらに別の消毒剤溶液中で撹拌下に洗浄される。このように消毒剤溶液中で繰り返し処理することにより、衛生用品の素材に残留する菌数は、著しく減少する。
【００１１】
本発明において、消毒剤溶液で処理された衛生用品の素材は、最後に熱湯中に浸される。この場合も、衛生用品の素材は、撹拌下に濯ぎ洗浄され、これにより、衛生用品の素材に付着する菌は死滅し、そして菌の数は著しく減少する。このように洗浄処理された衛生用品の素材は、５乃至１０ｍｍの目開きの篩により、抗菌剤溶液の噴霧下で篩分処理される。篩上には、抗菌剤溶液により濡れたプラスチック物質を主として含む衛生用品の素材が分けられ、篩下には、篩上産物と同様に抗菌剤溶液により濡れたパルプ及び高吸水性樹脂を含む衛生用品の素材が分けられる。
【００１２】
篩下のパルプ及び高吸水性樹脂を含む衛生用品の素材は、高吸水性樹脂が吸水してゲル状の物質となっており、ゲル状の物質から高吸水性樹脂に含まれる水を分離除去するために、塩化カルシウム水溶液で洗浄される。
塩化カルシウム水溶液により洗浄されて脱水された篩下産物のパルプ及び高吸水性樹脂を含む衛生用品の素材は、乾燥機、例えば送風乾燥機により乾燥される。乾燥されたパルプ及び高吸水性樹脂を含む篩下産物の衛生用品の素材は、乾式分級機、例えばエア分級により、比較的低含有量の高吸水性樹脂、例えば含有量が１重量％以下の高吸水性樹脂とパルプを含む比重が小さい衛生用品の素材と、比較的高含有量の高吸水性樹脂、例えば含有量が３重量％以上の高吸水性樹脂とパルプを含む比重が大きい衛生用品の素材とに分けられて、夫々衛生用品等の原材料として使用することができる。
【００１３】
本発明において、消毒剤は、汚れた衛生用品に付着する菌の殺菌に使用されるものであり、オゾン、塩素、次亜塩素酸ナトリウム、次亜塩素酸カルシウム、次亜塩素酸リチウム、二酸化塩素、臭化塩素、塩素化イソシアヌール酸、クロラミンＢ若しくはクロラミンＴがある。しかし、これらの消毒剤の他に、一般に、菌若しくは微生物の殺菌に使用される消毒剤、抗菌剤若しくは殺菌剤を使用することができる。衛生用品の菌の殺菌手段とし、消毒剤溶液を使用する場合には、消毒剤の濃度は、処理時間を短くするときは、消毒剤の濃度は高くされる。しかし３０分以上の処理時間であれば、消毒剤の使用濃度は、通常使用される程度の濃度で使用することができる。例えば、次亜塩素酸ナトリウム溶液の場合で、０．０５乃至３重量％で使用されるが、消毒の結果を調べて、その都度適宜増減して使用することができる。
【００１４】
本発明において、使用済み等の汚れた衛生用品についての粉砕は、消毒に要する時間を有効に使用するために、消毒剤の噴霧により、消毒剤溶液で濡れた衛生用品について連続的に行われるのが好ましい。しかし、本発明においては、汚れた衛生用品を消毒するために、汚れた衛生用品の粉砕物は、消毒剤溶液中で、撹拌下に消毒処理されるが、この消毒処理は、初期の消毒効果を達成するまでの間継続されるので、バッチ式で行われるのが好ましい。連続式で殺菌処理することもできるが、この場合は、初期の消毒効果を達成するまでの間、消毒処理槽内に滞留させることが必要であり、多くの設備を要することとなる。したがって、粉砕された使用済み等の汚れた衛生用品は、その量が所定量に達するまでの間、消毒剤溶液により濡れた状態で放置され、消毒が継続される。
【００１５】
消毒剤としては、塩素ガス、液体塩素、次亜塩素酸ナトリウム、さらし粉、高度晒粉（次亜塩素酸カルシウム）、次亜塩素酸カルシウム、次亜塩素酸リチウム、有機性塩素剤、二酸化塩素又はオゾンを使用することができる。オゾンは分解速度が早く、殺菌力が大きく短時間で殺菌するが、塩素はオゾンに比して殺菌力が小さく殺菌に長時間を要する。しかし、塩素消毒剤は、オゾン消毒剤に比して殺菌力の持続性が大きいので、本発明においては、液体塩素、次亜塩素酸ナトリウム若しくは次亜塩素酸カルシウムを使用するのが好ましい。消毒剤の溶液濃度については、汚れた衛生用品の種類、汚れ状態や処理時間に応じて使用される消毒剤溶液の濃度を設定するのが好ましい。
【００１６】
本発明において、例えば沸騰水又は８０℃以上の温度の熱湯が、撹拌洗浄工程で使用される。このように撹拌下に熱湯で濯ぐことにより、衛生用品の素材は熱湯により加熱され、衛生用品の素材に付着する菌を熱により滅菌することができ、再生回収された衛生用品の素材に付着する大腸菌を陰性にすることができる。一般に、使い捨て医療品の滅菌前の菌数は、例えば、生木綿で１０^６乃至１０^７／１ｇであり、脱脂綿で１０^２乃至１０^４／１ｇであり、ガーゼで１０^２乃至１０^４／１ｇであるが、本発明において、回収される衛生用品の素材は、少なくとも菌数が、前記例示の使い捨て医療品の滅菌前の菌数以下とすることができる。本発明において、大腸菌は死滅して形骸化し、希に僅かに残留するに過ぎないので、衛生的に問題にならない。
【００１７】
【実施例】
以下に、図面を参照して本発明の一実施例について説明するが、本発明は以下の説明及び例示により何ら限定されるものではない。
図１は、本発明の一実施例の汚れた紙おむつの処理装置の消毒工程の概略を示す工程図である。図２は、本発明の一実施例の紙おむつの処理装置における消毒された汚れた紙おむつの処理工程の概略の工程図である。
【００１８】
本例において、消毒剤としては、次亜塩素酸ナトリウムが使用されており、次亜塩素酸ナトリウムは、水に溶解して、０．２重量％の溶液で使用されている。汚れた紙おむつの粉砕機１の上部２には汚れた紙おむつの供給口３を備えており、消毒剤の溶液は、汚れた紙おむつの供給口３の上方に設けられている噴霧機４から噴霧される。粉砕機の内側には、汚れた紙おむつの供給口の上方に、噴霧機４により発生する消毒剤の次亜塩素酸ナトリウム溶液の煙霧、即ち次亜塩素酸ナトリウム溶液のミストを捕集して、該ミストが粉砕機１から外に逃散しないように、ミスト捕集器５が設けられている。粉砕機１の下部６は、破砕室７が形成されており、内部に下方に窄んだ形状の破砕羽根８を備え、電動モータ７により高速回転駆動される回転衝撃剪断破砕機９が設けられている。粉砕機１の下部６は、破砕室７となっている。破砕室７は、粉砕機１の上部に連通しており、この連通する部分に、汚れた紙おむつの供給口１１が開閉可能に開閉ダンパー１２を備えて形成されている。破砕室７の排出口１３の下方には、第一ベルトコンベヤ１４が設けられており、破砕室７で破砕された汚れた紙おむつの破砕物は、第一ベルトコンベヤ１４上に落下するように構成されている。
【００１９】
第一ベルトコンベヤ１４の端部１５の下方には、汚れた紙おむつ破砕物の供給シュート１６が形成されており、第一ベルトコンベヤ１４により搬送された汚れた紙おむつの破砕物は、供給シュート１６から、該供給シュート１６の下方に設けられている第二ベルトコンベヤ１７の上に供給される。第二ベルトコンベヤ１７は、その排出部１８が、第一洗浄槽１９の汚れた紙おむつの破砕物供給口２０上に位置して設けられており、第二ベルトコンベヤ１７上に送られた汚れた紙おむつの破砕物は、第二ベルトコンベヤ１７によって、汚れた紙おむつの破砕物供給口２０から第一洗浄槽１９に送られる。
【００２０】
第一洗浄槽１９は、その上部に、消毒剤供給用の配管２１が設けられており、汚れた紙おむつの破砕物が解されて、十分に消毒されるように、消毒剤溶液と撹拌混合される。本例において、汚れた紙おむつの破砕物を消毒剤溶液中で撹拌混合することは、汚れた紙おむつの破砕物を、紙おむつの個々の素材であるプラスチック材料製の不織布、吸水紙、パルプ、高吸水性樹脂及びプラスチック材料膜等に解し、これら個々の素材を、消毒剤と十分に接触させて消毒するためである。このために、本例においては、撹拌羽根２２を備える撹拌機２３が設けられている。汚れた紙おむつの破砕物が、消毒剤中で、撹乱されて解されて、該汚れた紙おむつ破砕物から遊離するプラスチック膜の破砕物、吸水紙の破砕物、プラスチック材料製不織布の破砕物、パルプ及び高吸水性樹脂は、これらに付着する汚れを消毒剤溶液により洗浄分離すると共に消毒される。
【００２１】
本例においては、第一洗浄槽１９の槽底部２４には、０．１ｍｍの開口を有する多孔板２５が設けられており、これにより解され消毒されたプラスチック膜の破砕物、プラスチック製の不織布、吸水紙の破砕物、パルプ及び高吸水性樹脂等の素材は、多孔板２５の上に沈降物として残留し、これら素材に付着していた汚れは、洗浄されて、多孔板２５の０．１ｍｍの開口を通して分離される。多孔板２５を通過した汚れは、槽底部２４に設けられている排出管２６を経て槽外に排出される。
【００２２】
第一洗浄槽１９において、多孔板２５上に沈降したプラスチック、吸水紙、パルプ及び高吸水性樹脂等を含む素材の沈降物は、多孔板２５の上面及び槽内壁面２８に沿って設けられている、外側に掻取り爪２９を有するチェーンコンベヤ３０を備える第一沈降物掻揚げ機３１により掻出されて、その端部３２から第二洗浄槽３３に送られる。
【００２３】
本例においては、第一洗浄槽１９の沈降物を、第二洗浄槽３３に送出するために、第一沈降物掻揚げ機３１の送出端部３２は、第二洗浄槽３３の沈降物供給口３４の上方に位置している。第二洗浄槽３３は、第一洗浄槽１９と同様な構造に形成されており、その上部に、消毒剤溶液の供給用の配管３５が設けられると共に、撹拌羽根３６を備える撹拌機３７が設けられており、第一洗浄槽１９で解されて、消毒剤溶液で洗浄され消毒された汚れた紙おむつの破砕物の素材は、さらに解されて、さらに消毒されるように、消毒剤と撹拌混合される。
【００２４】
本例においては、第二洗浄槽３３の槽底部３８には、第一洗浄槽１９と同様に、０．１ｍｍの開口を有する多孔板３９が設けられている。第二洗浄槽３３において、解され消毒された汚れた紙おむつの破砕物の素材は、０．１ｍｍより大きいから、多孔板３９の０．１ｍｍの開口を通過しないで多孔板３９の上に沈降物として残留し、これら素材に付着していた汚れは、洗浄されて遊離する。遊離した汚れは、殆どが０．１ｍｍより小さいので、多孔板３９の０．１ｍｍの開口を通して分離される。多孔板３９を通過した汚れは、槽底部３８に設けられている排出管４０を経て槽外に排出される。
【００２５】
第二洗浄槽３３において、多孔板２５上に沈降した紙おむつの素材の沈降物は、多孔板３９の上面４１及び槽内壁面４２に沿って設けられている、外側に掻取り爪４３を有するチェーンコンベヤ４４を備える第二沈降物掻揚げ機４５により掻出されて、その端部４６から第三洗浄槽４７に送られる。本例においては、第二洗浄槽３３の沈降物を、第三洗浄槽４７に送出するために、第二沈降物掻揚げ機４５の送出端部４６は、第三洗浄槽４７の沈降物供給口４８の上方に位置している。
【００２６】
第三洗浄槽４７は、消毒剤中で消毒処理された第二洗浄槽３３の沈降物をさらに消毒処理するものであり、第二洗浄槽３３で生成する沈降物中に大腸菌が検出されないときは、省略することができる。第三洗浄槽４７には、熱湯消毒ができるように、上部に熱湯供給口４９が形成されており、本例においては、沸騰温度に加熱された熱湯が該熱湯供給口４９から第三洗浄槽４７内に供給される。第二洗浄槽３３からの沈降物中に隠れて、消毒剤と接触しない微生物についても、熱湯により加熱されるので、熱により消毒することができる。第三洗浄槽内には、撹拌羽根５０を備える撹拌機５１が設けられており、第二洗浄槽３３からの沈降物の汚れた紙おむつの破砕物の素材は、撹拌機５１の撹拌作用によりさらに解されて、熱湯によりさらに消毒される。
【００２７】
本例においては、第三洗浄槽４７の槽底部５２においても、第二洗浄槽３３と同様に、０．１ｍｍの開口を有する多孔板５３が設けられている。第三洗浄槽４７において、解され消毒された紙おむつの破砕物の素材は、０．１ｍｍより大きいから、多孔板５３の開口を通過しないで多孔板５３の上に沈降物として残留し、これら素材に付着していた汚れは、洗浄されて遊離する。遊離した汚れは、殆どが０．１ｍｍより小さいので、多孔板５３の０．１ｍｍの開口を通して分離される。多孔板５３を通過した汚れは、槽底部５２に設けられている排出管５４を経て槽外に排出される。
【００２８】
第三洗浄槽４７において、多孔板５３上に沈降した紙おむつの素材の沈降物は、多孔板５３の上面５５及び槽内壁面５６に沿って設けられている、外側に掻取り爪５７を有するチェーンコンベヤ５８を備える第三沈降物掻揚げ機５９により掻出されて、その端部６０から定量スクリューコンベヤ６１に供給され、該定量スクリューコンベヤ６１により、湿式振動篩機６２に供給される。本例においては、湿式振動篩機６２には、目詰まりを防止すると共に排出される素材を消毒し、脱臭するために、抗菌剤溶液が噴霧される。本例において抗菌剤溶液としては、抗菌機能及び消臭機能を有するパンシルＢＡ２１０−１（リリース化学工業株式会社製、商品名）の１重量パーセント溶液が使用された。
【００２９】
本例において、上段篩６３としては、篩の目開きが１０ｍｍの篩が使用され、下段篩６４としては、篩の目開きが５ｍｍの篩が使用されている。したがって、本例において、上段篩６３の篩上は、１０ｍｍ以上の粒度のものであって、主としてプラスチック材料膜の粉砕物及びプラスチック材料製の不織布の粉砕物を含む素材であり、上段排出路６５より排出される。下段篩６４の篩上は、１０ｍｍ乃至５ｍｍの粒度のものであって、パルプを比較的高い含有率で含み、高吸水性樹脂を比較的低い含有率で含む素材であり、中間段排出路６６より排出される。下段篩６４の篩下は、５ｍｍ以下の粒度のものであって、パルプを前記中間段の排出物よりも低い含有率で含み、高吸水性樹脂を前記中間段の排出物よりも高い含有率出含む素材であり、下段排出路６７より排出される。
【００３０】
上段排出路６５及び中間段排出路６６より排出された、消毒された紙おむつの破砕物の素材は合わされて第一素材排出コンベヤ６８により搬送される。下段排出路６７より排出された消毒された紙おむつの破砕物の素材は第二素材排出コンベヤ６９により搬送される。
第一素材排出コンベヤ６８は遠心脱水装置７０に接続しており、第一素材排出コンベヤ６８により搬送される消毒された紙おむつの粉砕物の素材は、遠心脱水装置７０に送られて遠心力により水分が分離される。
【００３１】
遠心脱水装置７０の搬送コンベヤ７２は、第一熱風乾燥機７３に接続しており、脱水された消毒された紙おむつの粉砕物の素材の脱水物は、コンベヤ７２により第一熱風乾燥機７３に送られ、熱風乾燥される。第一熱風乾燥機７３の搬送コンベヤ７４は、貯蔵装置７５に接続しており、第一熱風乾燥機７３で熱風乾燥された消毒された紙おむつの粉砕物の素材の乾燥物は、第一貯蔵装置７５に送られて貯蔵される。貯蔵装置７５に貯蔵される素材は、主たる成分のプラスチック物質、パルプ及び高吸水性樹脂を含む素材であり、ペレットに成形して、猫砂、固形燃料若しくは杭、枕木等の園芸用品に使用でき、また、吸水紙の間に配置してシート状に成形してシートとして、又はプラスチックフィルムとプラスチック材料製の不織布の間に、前記成形したシートを配置しシート状に成形してシートとして、例えば、吸水シート、ペットシーツ、合板、緩衝材、ルーフィングシート、ウェス、建築用シート、パレット材、吸油シートとすることができる。
【００３２】
第二素材排出コンベヤ６９は、脱水剤の粉末状塩化カルシウムの供給管７７を備える脱水槽７８に接続しており、第二素材排出コンベヤ６８により搬送され、ゲル状の高吸水性樹脂を比較的多量に含む消毒された紙おむつの粉砕物の素材は、脱水槽７８に供給される。脱水槽７８は、その内部に撹拌装置が設けられ、底部に、例えば孔径が０．１ｍｍの開口を有する多孔板が設けられ、脱水剤の粉末状の塩化カルシウムが、塩化カルシウム供給管７７から供給充填されている。そこで、脱水槽７８に供給された汚れた紙おむつの粉砕物の素材中の、高吸水性樹脂は、撹拌下に塩化カルシウム５重量％水溶液により脱水されて再生される。脱水槽７８の搬送コンベヤ７９は第二熱風乾燥機８０に接続しており、脱水槽７８で脱水された素材は、第二熱風乾燥機８０に送られて熱風乾燥される。一方、脱水槽７８で使用された塩化カルシウムは、水分を吸収して液状となり脱水槽７８の底部の排出管８１から排出されて、前記排出路２６に合流して、排水処理槽（図示されていない）に送られて、例えば活性汚泥法等により排水処理される。
【００３３】
熱風乾燥機８０の乾燥物排出路８２は、サイクロン型の乾式分級機８３の導入口８４に接続しており、熱風乾燥機８０で熱風乾燥された素材は、送風機（図示されていない）により形成される気流中に供給され、気流中により導入口８４から乾式分級機８３に導入される。乾式分級機８３は、上部中央部に設けられている軽い分級成分の出口８５が、流路８６に接続して設けられ、重い分級成分の出口８７には流路８８が接続して設けられている。前記流路８６は第二貯蔵装置８９に接続している。第二貯蔵装置８９の頂部には、微粉状の分級成分が第二貯蔵装置８９の外部に流出しないようにバグフィルター９０が設けられている。前記乾式分級機８３で分級された中で、軽い分級成分は、パルプに富む素材であり、流路８６から第二貯蔵装置８９に送られ貯蔵される。このパルプに富む素材は、第二貯蔵装置８９の下部に設けられている取出しコンベヤ９１から取り出される。このパルプに富む素材は、例えば、吸水紙の間に配置して、又はプラスチックフィルムとプラスチック材料製の不織布の間に、前記成形したシートを配置してシート上に成形して、例えば、吸水シート、ペットシーツ、ウェス、吸油シート、トイレットペーパ、便座シートとすることができる。
【００３４】
前記流路８８は第三貯蔵装置９２に接続している。第三貯蔵装置９２の頂部には、微粉状の分級成分が第三貯蔵装置９２の外部に流出しないようにバグフィルター９３が設けられている。前記乾式分級機８３で分級された重い分級成分は、高吸水性樹脂に富む素材であり、流路８８から第三貯蔵装置９２に送られ貯蔵される。この高吸水性樹脂に富む素材は、第三貯蔵装置９２の下部に設けられている取出しコンベヤ９４から取り出される。この高吸水性樹脂に富む素材は、例えば、ペレット状に成形して農業及び園芸用の土壌保水剤、育苗及び園芸用の植物育成用の培土に使用でき、また前記高吸水性樹脂に富む素材は、吸水紙間に配置してシート状に成形して、育苗用の吸水シートとして使用できる。
【００３５】
【発明の効果】
本発明は、汚れが付着している衛生用品を粉砕し、この粉砕された衛生用品を消毒剤を含有する水中に分散させて、衛生用品に付着していた汚れの一部を前記衛生用品の粉砕物から分離して、汚れが付着している衛生用品からその素材を消毒され、洗浄されて清浄なものとして回収して、該衛生用品の素材を有効に使用するものであり、従来、専ら廃棄されていた汚れた衛生用品を、衛生用品や園芸及び農業用品の原材料として有効に活用するものであり、廃棄に要した費用を有効な原材料の製造に活用する点でコストの軽減に寄与し、資源の有効利用を図って資源の無駄を極力避けるものである。しかも、その処理量は膨大であり、新しい産業を興すことができ、社会に大きく貢献するものである。
【図面の簡単な説明】
【図１】本発明の一実施例の汚れた紙おむつの処理装置の消毒工程の概略を示す工程図である。
【図２】本発明の一実施例の紙おむつの処理装置における消毒された汚れた紙おむつの処理工程の概略の工程図である。
【符号の説明】
１　粉砕機
２　粉砕機１の上部
３、１１　供給口
４　噴霧機
５　ミスト捕集器
６　粉砕機１の下部
７　破砕室、電動モータ
８　破砕羽根
９　回転衝撃剪断破砕機
１２　開閉ダンパー
１３　排出口
１４　第一ベルトコンベヤ
１５　第一ベルトコンベヤ端部
１６　破砕物供給シュート
１７　第二ベルトコンベヤ
１８　排出部
１９　第一洗浄槽
２０　破砕物供給口
２１　消毒剤供給用の配管
２２、３６、５０　攪拌羽根
２３、３７、５１　攪拌機
２４、３８、５２　槽底部
２５、３９、５３　多孔板
２６、４０、５４、８１　排出管
２８、４２、５６　槽内壁面
２９、４３、５７　掻取り爪
３０、４４、５８　チェーンコンベヤ
３１　第一沈降物掻揚げ機
３２、４６　送出端部
３３　第二洗浄槽
３４、４８　沈降物供給口
３５　配管
４１　多孔板３９の上面
４５　第二沈降物掻揚げ機
４７　第三洗浄槽
４９　熱湯供給口
５５　多孔板５３の上面
５９　第三沈降物掻揚げ機
６０　第三沈降物掻揚げ機端部
６１　定量スクリューコンベヤ
６２　湿式振動篩機
６３　上段篩
６４　下段篩
６５　上段排出路
６６　中間段排出路
６７　下段排出路
６８　第一素材排出コンベヤ
６９　第二素材排出コンベヤ
７０　遠心脱水装置
７２、７４、７９　搬送コンベヤ
７３　第一熱風乾燥機
７５　貯蔵装置
７７　供給管
７８　脱水槽
８０　第二熱風乾燥機
８２　排出路
８３　乾式分級機
８４　導入口
８５　軽い分級成分出口
８６、８８　流路
８７　重い分級成分出口
８９　第二貯蔵装置
９０、９３　バグフィルター
９１、９４　取出しコンベヤ
９２　第三貯蔵装置[0001]
[Industrial applications]
The present invention relates to a method for recovering materials from soiled sanitary goods, and more particularly to a method for recovering materials from soiled sanitary goods and used sanitary goods during manufacturing so that the materials can be reused. In addition, the present invention relates to a method for collecting sanitary goods from a sanitary article, and more particularly to a method for collecting sanitary goods from used sanitary goods. .
[0002]
[Prior art]
Sanitary articles such as disposable diapers, milk pads, urine pads and sanitary napkins are manufactured to be disposable. Such a disposable sanitary article has a water-absorbing layer portion formed of a pulp material containing a highly water-absorbent resin between layers formed of two water-absorbing papers, and a lower side of one of the water-absorbing paper layers. It is formed by providing a water-impermeable plastic film and providing a nonwoven fabric on the other water-absorbing paper.
This disposable sanitary article is convenient because it can be discarded after use after washing, because it can be used repeatedly, and is used in hospitals and homes.
[0003]
[Problems to be solved by the invention]
Even such disposable sanitary articles are required to be sanitary for the purpose of use, and are only discarded in the manufacturing process and discarded and incinerated. Although the amount is small overall, the total amount is large, so that the amount to be incinerated is not negligible but a problem. Such sanitary articles are required to be sanitary, and are therefore difficult to regenerate. So far, even renewing has not been talked about. In particular, so-called used diapers after use are soiled with stool and urine, and the treatment is performed exclusively by incineration. The amount of used disposable diapers is enormous, and the disposal cost of used disposable diapers is, for example, 100 to 160 yen per kilogram, which is a very large amount, which is a problem. In addition, incineration requires a large amount of fuel and a large amount of manpower, which is a problem.
An object of the present invention is to solve the problems related to the reprocessing of such a dirty sanitary article.
[0004]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to disinfect or sterilize Escherichia coli and other germs attached to dirty sanitary goods, and to recover a sanitary material.
The present inventor has found that in the process of crushing (that is, crushing or pulverizing) a soiled sanitary article wet with a disinfecting solution and performing a stirring process in the disinfecting solution, the dirt is separated from the material of the sanitary article, or Was found to be able to be separated, leading to the present invention.
[0005]
That is, the present invention crushes a soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water, and disperses the crushed sanitary article in water containing a disinfectant to form a sanitary article. A method for recovering a material from a soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water, characterized in that a part of the adhered dirt is separated from a crushed product of the sanitary article. In addition, the present invention crushes a soiled sanitary article containing a water-absorbent resin which has become a gel by absorbing water, and disperses the crushed sanitary article in water containing a disinfectant, thereby improving hygiene. Part of the dirt attached to the article is separated from the pulverized product of the sanitary article, and then the pulverized product of the sanitary article from which the part of the dirt attached to the sanitary article is separated is dispersed in boiling water. Of the dirt remaining on the sanitary goods The method for recovering the material from a soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water characterized by separating the pulverized product of the sanitary article, furthermore, the present invention, A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant to form a sanitary article. Disintegrate into individual materials of the pulverized material, the water-absorbing resin in a gel state by absorbing water characterized by separating a part of the dirt attached to the sanitary goods from the sanitary goods pulverized material The present invention relates to a method for recovering the material from a dirty sanitary article containing the same, and furthermore, the present invention crushes a dirty sanitary article containing a water-absorbent resin which has become a gel by absorbing water in the presence of a disinfectant. Then, this crushed hygiene article contains a disinfectant Dispersed therein, disintegrate the pulverized product of the sanitary article into its individual materials, and separate a part of the dirt adhering to the sanitary article from the pulverized product of the sanitary article; The crushed product of the sanitary ware is dispersed in boiling water, and the crushed product of the sanitary ware is further broken down into individual materials of the crushed product of the sanitary ware, and one of the remaining dirt adhered to the sanitary ware is removed. A method of recovering the material from a dirty sanitary article containing a water-absorbent resin that has been absorbed and formed into a gel, wherein the part is separated from a crushed product of the sanitary article. The present invention crushes a soiled sanitary article containing a water-absorbent resin which has become a gel by absorbing water to a particle size of 50 mm or less in the presence of a disinfectant, and contains the crushed sanitary article containing a disinfectant. Dispersed in water to break up the crushed hygiene product into its individual materials Forming a suspension containing the material of the pulverized product of the sanitary product, filtering the suspension, and separating a part of the dirt attached to the sanitary product from the material of the pulverized product of the sanitary product. The present invention relates to a method for recovering a material from a dirty sanitary article containing a water-absorbent resin which is in a gel form by absorbing water. The soiled sanitary goods containing a super water absorbent resin which has been crushed to a particle size of 50 mm or less in the presence of a disinfectant, the crushed sanitary goods are dispersed in water containing a disinfectant, The crushed material of the article is broken into its individual components to form a suspension containing the material of the crushed product of the sanitary article, and the suspension is filtered to remove any dirt that has adhered to the sanitary article. A part is separated from the material of the pulverized product of sanitary goods, and then this filtration residue is dispersed in boiling water. A hot water suspension containing the ground material of the sanitary article is formed, and the hot water suspension is filtered, and a part of the remaining dirt adhering to the sanitary article is pulverized. The present invention relates to a method for recovering a material from a contaminated sanitary article containing a water-absorbent resin which has become a gel by absorbing water, characterized in that the material is separated from the substance.
[0006]
Further, the soiled sanitary goods containing the water-absorbent resin that has become a gel by absorbing water is crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary goods are immersed in water containing a disinfectant. To disperse the pulverized product of the sanitary product into its individual materials to form a suspension containing the material of the pulverized product of the sanitary product. High water absorption in a gel form by absorbing water by filtering with a filter material having an opening of 1 mm or less and separating a part of the dirt attached to the sanitary goods from the material of the crushed material of the sanitary goods. The present invention relates to a method for recovering a material from a dirty sanitary article containing a water-soluble resin, and the present invention provides a method for removing a dirty sanitary article containing a water-absorbent resin that has become a gel by absorbing water in the presence of a disinfectant. Crushed to a particle size of 50 mm or less, and the crushed sanitary goods contain a disinfectant. Disintegrated in water, the crushed product of the sanitary product is broken up into its individual materials to form a suspension containing the material of the crushed product of the sanitary product, Filtration with a filter medium having an opening of 1 mm or less separates a part of the dirt attached to the sanitary goods from the material of the crushed sanitary goods, and then disperses the filtration residue in hot water to form the sanitary goods. A hot water suspension containing the material of the pulverized material is formed, and the hot water suspension is filtered through a filter medium having a pore size of the filter medium of 1 mm or less to remove remaining dirt attached to the sanitary article. There is a method of recovering the material from a soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water, characterized in that a part of the sanitary article is separated from the crushed product of the sanitary article, The present invention relates to a disinfectant for sanitary hygiene articles containing a water-absorbent resin which has become a gel by absorbing water. In the presence, it is crushed to a particle size of 50 mm or less, the crushed sanitary article is dispersed in water containing a disinfectant, and the crushed product of the sanitary article is broken down into its individual materials, and A suspension containing the material of the pulverized material is formed, and this suspension is filtered through a filter medium having a pore size of 1 mm or less, and a part of the dirt adhering to the sanitary goods is crushed. The filtered residue is then sieved under a spray of a disinfectant solution with a sieve having a pore size of 5 to 10 mm to sieve a pulverized sanitary article mainly containing a pulp material and a water absorbent resin. Separating the separated product and the sieved product of a crushed product of a sanitary product mainly containing plastic substances from a dirty sanitary product containing a water-absorbent resin that has become a gel by absorbing water. In the method of recovering the material. In the presence of a disinfectant, a soiled sanitary article containing a water-absorbent resin that has become a gel by water absorption is crushed to a particle size of 50 mm or less, and the crushed sanitary article is dissolved in water containing a disinfectant. Dispersing and breaking the pulverized product of the sanitary product into its individual materials to form a suspension containing the material of the pulverized product of the sanitary product; Filtered with a filter medium, a part of the dirt attached to the sanitary goods is separated from the material of the crushed sanitary goods, then the material of the crushed sanitary goods of the filtration residue is dispersed in boiling water, A hot water suspension containing the material of the pulverized product of the sanitary article is formed, and the hot water suspension is filtered through a filter medium having a filter material having a pore opening of 1 mm or less, thereby removing the dirt attached to the sanitary article. Is separated from the pulverized product of the sanitary article, and the filtration residue of the hot water suspension is subjected to pore size analysis. A sieved product of a sanitary product mainly containing a pulp material and a water-absorbent resin, which is sieved under a spray of a disinfectant solution with a sieve of 5 to 10 mm, and a crushed product of a sanitary product mainly containing a plastic substance The method for recovering the material from a soiled sanitary article containing a water-absorbent resin that is in a gel form by absorbing water characterized by separating the product from the sieved product is further provided. Dirty sanitary goods containing a water-absorbent resin that has become a gel by absorbing water are crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary goods are dispersed in water containing a disinfectant. Then, the pulverized material of the sanitary article is disintegrated into individual materials to form a suspension containing the material of the pulverized material of the sanitary article. Filter with the following filter media and adhere to sanitary goods A part of the dirt is separated from the material of the crushed material of the sanitary goods, and the filtration residue is subjected to particle size separation under a spray of an antibacterial agent solution through a sieve having a sieve having a sieve of 5 to 10 mm. And a sieved product mainly containing a plastic substance and a sieved product mainly containing a plastic substance, and then drying the sieved product mainly containing a pulp material and a water absorbent resin to obtain a dried product. Dry classification of the product, a classified product having a high pulp content and a classified product having a smaller pulp content than the classified product is a water-absorbent resin that is in a gel state by absorbing water. The present invention relates to a method for recovering a material from a contained sanitary article, and in addition to the above, the present invention relates to a method for disinfecting a sanitary article containing a water-absorbent resin which has become a gel by absorbing water. 50mm or less in the presence Pulverized to a particle size, the pulverized sanitary article is dispersed in water containing a disinfectant, and the pulverized material of the sanitary article is disintegrated into individual materials, and the pulverized material of the sanitary article is used as a raw material. A suspension containing the filter is formed, and the suspension is filtered through a filter having a pore size of 1 mm or less, and a part of the dirt adhering to the sanitary product is removed from the material of the crushed sanitary product. Separate and disperse the filtration residue in hot water to form a hot water suspension containing the material of the pulverized material of the sanitary article. The hot water suspension is filtered with a filter medium having a filter medium having a pore size of 1 mm or less. And a part of the remaining dirt adhering to the sanitary ware is separated from the pulverized product of the sanitary ware, and the filtration residue of the hot water suspension is filtered with a sieve having an opening of 5 to 10 mm. The particle size is separated by spraying the antibacterial agent solution with a sieve, and the sieved product mainly containing pulp material and water absorbent resin It is divided into a sieving product mainly containing a plastic substance, and then, the sieving product mainly containing a pulp material and a water-absorbent resin is dried, and the obtained dried product is subjected to dry classification to classify the pulp content to be large. Product, and a method for recovering the material from a dirty sanitary article containing a water-absorbent resin that has become a gel by absorbing water, characterized in that the product is separated into a classified product having a lower pulp content than the classified product. is there.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, the term dirty sanitary ware refers to sanitary ware that has been soiled during the manufacturing process, transportation process and display process of the sanitary ware, as well as used sanitary ware. In the present invention, the term pulverization means crushing, crushing, medium crushing and cutting.
In the context of the present invention, a dirty hygiene article means a dirty paper diaper, a dirty milk pad, a dirty urine pad, a dirty sheet, a dirty gauze, a dirty bandage or a dirty absorbent cotton or a set of two or more of these hygiene articles. I do. In the present invention, the sanitary articles to which dirt is attached particularly mean used paper diapers.
[0008]
Sanitary articles, especially sanitary articles such as disposable diapers and water-absorbent pads, have a water-absorbent layer formed of pulp and a water-absorbent resin disposed between the layers of water-absorbent paper, and beneath the layer of water-absorbent paper at the bottom. A water-impervious plastic material membrane is provided at a location, and a non-woven fabric of a water-permeable plastic material is provided over the upper absorbent paper layer. In the case of used sanitary articles, for example, used disposable diapers, dirt such as feces and feces due to excretion mainly adheres to a part of a non-woven fabric made of plastic material, and dirt due to bodily fluids such as urine is made of plastic material. Attaches to nonwoven fabric, water absorbing layer and part of plastic material film. In the case of a used urine pad or milk pad, dirt due to body fluids such as sweat and urine mainly adheres to a part of a nonwoven fabric made of a plastic material, a part of a water-absorbing layer, and a part of a plastic material film.
[0009]
In the present invention, the soiled hygiene article is sprayed with a disinfectant solution and wetted with the disinfectant solution prior to grinding. The sanitary article wet with the disinfectant solution is sent to a cutter or crusher, where the sanitary article is cut or crushed to a size of 50 mm or less, preferably 30 mm or less. The sanitary goods pulverized material cut or crushed by the cutting machine or the crusher has a dirty portion and a non-dirty portion, and is easily separated.
Further, in the present invention, the pulverized sanitary goods pulverized product is introduced into a disinfectant solution under stirring to be disintegrated into materials constituting the sanitary goods, and water-soluble dirt adhering to the materials is almost all. Is dissolved in the disinfectant solution and separated from the material, and solid contaminants such as feces and feces are dissociated and washed by the stirring action of the stirring member and the disturbing action of the disinfectant solution, and most of the material is separated from the material. can do.
[0010]
The water-soluble stains separated from the material in this way dissolve and move into the solution, and most of the solid stains such as feces are finely dispersed and dispersed in the solution. The material of the sanitary ware is cleaned and sterilized by the stirring treatment in the disinfectant solution. In order to separate the material of the sanitary ware thus treated, the disinfectant solution in which the material of the sanitary ware is suspended is sent to, for example, a sieve having an opening of 0.1 to 1 mm. By the stirring treatment in the disinfectant solution, most of water-soluble dirt and solid dirt adhering to the pulverized sanitary goods become dissolved or suspended in the disinfectant solution. Most of the water-soluble dirt and solid dirt adhering to the sanitary ware will be contained under the sieve or in the filtrate by separating with a mesh sieve or a filter medium. And separated. The material of the sanitary article thus separated is washed with stirring in another disinfectant solution. Such repeated treatment in the disinfectant solution significantly reduces the number of bacteria remaining in the material of the sanitary article.
[0011]
In the present invention, the sanitary article material treated with the disinfectant solution is finally immersed in boiling water. In this case, too, the material of the hygiene article is rinsed with stirring, whereby the bacteria which adhere to the material of the hygiene article are killed and the number of bacteria is significantly reduced. The material of the sanitary ware thus washed is sieved with a sieve having an opening of 5 to 10 mm under spraying of the antibacterial agent solution. On the sieve, materials of sanitary goods mainly containing plastic substances wetted by the antibacterial agent solution are divided. Under the sieve, sanitary products containing pulp and superabsorbent resin wetted by the antibacterial agent solution as well as products on the sieve. The material of the goods is divided.
[0012]
The material of sanitary goods including pulp under the sieve and super absorbent resin is a gel-like substance by absorbing the super absorbent resin, and the water contained in the super absorbent resin is separated and removed from the gel substance. To be washed with an aqueous solution of calcium chloride.
The material of the sanitary goods containing the pulp of the under-sieved product which has been washed and dehydrated with an aqueous solution of calcium chloride and the superabsorbent resin is dried by a dryer, for example, a blow dryer. The material of the sanitary ware of the sifted product containing the dried pulp and the superabsorbent resin is obtained by a dry classifier, for example, air classification, with a relatively low content of the superabsorbent resin, for example, having a content of 1% by weight or less. A material for hygiene products having a low specific gravity including a superabsorbent resin and pulp, and a hygiene product having a relatively high content of a superabsorbent resin having a relatively high content, for example, a high specific gravity including a superabsorbent resin having a content of 3 wt% or more and pulp And can be used as raw materials such as sanitary goods.
[0013]
In the present invention, the disinfectant is used for disinfecting bacteria attached to dirty sanitary goods, and includes ozone, chlorine, sodium hypochlorite, calcium hypochlorite, lithium hypochlorite, chlorine dioxide. , Chlorine bromide, chlorinated isocyanuric acid, chloramine B or chloramine T. However, in addition to these disinfectants, disinfectants, antibacterial agents or disinfectants generally used for disinfecting bacteria or microorganisms can be used. In the case of using a disinfectant solution as a means for disinfecting bacteria of hygiene articles, the concentration of the disinfectant is increased when the treatment time is shortened. However, as long as the processing time is 30 minutes or more, the disinfectant can be used at a concentration that is normally used. For example, in the case of a sodium hypochlorite solution, it is used in an amount of 0.05 to 3% by weight.
[0014]
In the present invention, crushing of the used sanitary articles such as used is continuously performed on the sanitary articles wet with the disinfectant solution by spraying the disinfectant in order to effectively use the time required for disinfection. Is preferred. However, in the present invention, in order to disinfect the soiled sanitary goods, the crushed material of the soiled sanitary goods is disinfected in a disinfectant solution with stirring, but this disinfection treatment has an initial disinfecting effect. Is preferably carried out in a batch mode, since the process is continued until the above is achieved. Sterilization treatment can be performed in a continuous manner, but in this case, it is necessary to stay in the disinfection treatment tank until the initial disinfection effect is achieved, and many facilities are required. Therefore, the crushed used sanitary goods, such as used, are left in a wet state with the disinfectant solution until the amount reaches the predetermined amount, and the disinfection is continued.
[0015]
Disinfectants include chlorine gas, liquid chlorine, sodium hypochlorite, bleached powder, highly bleached powder (calcium hypochlorite), calcium hypochlorite, lithium hypochlorite, organic chlorinating agents, chlorine dioxide or Ozone can be used. Ozone has a high decomposition rate, has a large sterilizing power and sterilizes in a short time, whereas chlorine has a small sterilizing power as compared with ozone and requires a long time for sterilization. However, since the chlorinated disinfectant has a longer germicidal activity than the ozone disinfectant, in the present invention, it is preferable to use liquid chlorine, sodium hypochlorite or calcium hypochlorite. As for the concentration of the disinfectant solution, it is preferable to set the concentration of the disinfectant solution to be used in accordance with the type of soiled sanitary ware, the state of contamination, and the processing time.
[0016]
In the present invention, for example, boiling water or hot water having a temperature of 80 ° C. or more is used in the stirring and washing step. By rinsing with hot water under stirring in this way, the material of the sanitary ware is heated by the hot water, and the bacteria that adhere to the material of the sanitary ware can be sterilized by heat, and adhere to the material of the recycled and recovered sanitary ware. E. coli can be made negative. In general, the number of bacteria before sterilization of disposable medical products is, for example, 10% for raw cotton. ⁶ To 10 ⁷ / 1g, 10% with absorbent cotton ² To 10 ⁴ / 1g, 10% with gauze ² To 10 ⁴ However, in the present invention, the material of the sanitary article to be recovered in the present invention can have at least the number of bacteria equal to or less than the number of bacteria before sterilization of the above-described disposable medical product. In the present invention, Escherichia coli is extinct and forms a dead body, and rarely remains in a small amount.
[0017]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited by the following description and examples.
FIG. 1 is a process diagram showing an outline of a disinfection process of a treatment device for a dirty paper diaper according to one embodiment of the present invention. FIG. 2 is a schematic process diagram of the processing steps of the disinfected and dirty disposable diaper in the disposable diaper processing apparatus according to one embodiment of the present invention.
[0018]
In this example, sodium hypochlorite is used as a disinfectant, and sodium hypochlorite is dissolved in water and used in a 0.2% by weight solution. The upper portion 2 of the grinder 1 of the dirty paper diaper is provided with a supply port 3 of the dirty paper diaper, and a disinfectant solution is sprayed from a sprayer 4 provided above the supply port 3 of the dirty paper diaper. You. Inside the crusher, above the supply port of the dirty paper diaper, the fume of the disinfectant sodium hypochlorite solution generated by the sprayer 4, that is, the mist of the sodium hypochlorite solution is collected, A mist collector 5 is provided so that the mist does not escape from the crusher 1 to the outside. A crushing chamber 7 is formed in a lower portion 6 of the crusher 1, and a crushing blade 8 having a shape constricted downward is provided therein, and a rotary shock shearing crusher 9 driven at high speed by an electric motor 7 is provided therein. ing. The lower part 6 of the crusher 1 is a crushing chamber 7. The crushing chamber 7 communicates with the upper part of the crusher 1, and a supply port 11 of a dirty paper diaper is provided with an openable / closable damper 12 at the communicating portion. A first belt conveyor 14 is provided below the discharge port 13 of the crushing chamber 7, and the crushed soiled diaper crushed in the crushing chamber 7 is configured to fall on the first belt conveyor 14. Have been.
[0019]
Below the end 15 of the first belt conveyor 14, there is formed a supply chute 16 for dirty diaper crushed material, and the crushed dirty paper diaper conveyed by the first belt conveyor 14 is supplied from the supply chute 16 Is supplied onto a second belt conveyor 17 provided below the supply chute 16. The second belt conveyor 17 is provided with its discharge section 18 positioned above the crushed material supply port 20 of the dirty paper diaper in the first washing tank 19, and is provided with the dirty belt sent to the second belt conveyor 17. The crushed paper diaper is sent from the crushed paper diaper supply port 20 to the first washing tank 19 by the second belt conveyor 17.
[0020]
The first washing tank 19 is provided with a disinfectant supply pipe 21 at an upper portion thereof, and is stirred and mixed with a disinfectant solution so that the crushed soiled diaper is disintegrated and sufficiently disinfected. You. In this example, stirring and mixing the crushed disposable diaper in the disinfectant solution involves mixing the crushed disposable diaper with a nonwoven fabric, a water-absorbing paper, a pulp, and a high water-absorbing material, which are individual materials of the diaper. This is to disintegrate the resin into a film of a conductive resin and a plastic material, and to disinfect the individual materials by sufficiently contacting them with a disinfectant. For this purpose, in this example, a stirrer 23 having a stirring blade 22 is provided. A crushed product of a dirty paper diaper is disturbed and disentangled in a disinfectant, and a crushed product of a plastic film, a crushed product of water-absorbent paper, a crushed product of a nonwoven fabric made of a plastic material, a pulp The superabsorbent resin and the superabsorbent resin are washed and separated with a disinfectant solution and disinfected.
[0021]
In this example, a perforated plate 25 having an opening of 0.1 mm is provided in the bottom 24 of the first cleaning tank 19, and a crushed plastic film disintegrated and disinfected by this, a nonwoven fabric made of plastic Materials such as crushed water-absorbing paper, pulp, and highly water-absorbent resin remain as sediments on the perforated plate 25, and the dirt attached to these materials is washed and the perforated plate 25 is removed. Separated through a 1 mm opening. The dirt that has passed through the perforated plate 25 is discharged out of the tank via a discharge pipe 26 provided in the tank bottom 24.
[0022]
In the first washing tank 19, sediment of a material including plastic, water-absorbing paper, pulp, and highly water-absorbent resin that has settled on the perforated plate 25 is provided along the upper surface of the perforated plate 25 and the inner wall surface 28 of the tank. It is scraped out by a first sediment scraping machine 31 having a chain conveyor 30 having a scraping claw 29 on the outside, and is sent from its end 32 to a second washing tank 33.
[0023]
In this example, in order to send out the sediment in the first washing tank 19 to the second washing tank 33, the delivery end 32 of the first sediment scraping machine 31 needs to supply the sediment in the second washing tank 33. It is located above the mouth 34. The second cleaning tank 33 is formed in a structure similar to that of the first cleaning tank 19, and a pipe 35 for supplying a disinfectant solution is provided on the upper part thereof, and a stirrer 37 having a stirring blade 36 is provided thereon. The material of the crushed disposable diaper that has been disintegrated and disintegrated in the first cleaning tank 19 and disinfected by disinfectant cleaning and disinfecting is further mixed with the disinfectant so that it is disintegrated and disinfected. Is done.
[0024]
In the present example, a perforated plate 39 having an opening of 0.1 mm is provided at the tank bottom 38 of the second cleaning tank 33, similarly to the first cleaning tank 19. In the second washing tank 33, the material of the crushed disinfected disposable diaper that has been disintegrated and disinfected is larger than 0.1 mm, and the sediment on the perforated plate 39 does not pass through the 0.1 mm opening of the perforated plate 39. And the dirt attached to these materials is washed away. The loose dirt is separated through a 0.1 mm opening in the perforated plate 39, as most are less than 0.1 mm. The dirt that has passed through the perforated plate 39 is discharged out of the tank via a discharge pipe 40 provided in the tank bottom 38.
[0025]
In the second washing tank 33, the sediment of the material of the disposable diaper settled on the perforated plate 25 is provided along the upper surface 41 of the perforated plate 39 and the inner wall surface 42 of the chain, and has a chain having a scraping claw 43 on the outside. It is scraped out by a second sediment scraper 45 having a conveyor 44 and sent from its end 46 to a third washing tank 47. In the present example, in order to send out the sediment in the second washing tank 33 to the third washing tank 47, the delivery end 46 of the second sediment scraping machine 45 uses the sediment supply in the third washing tank 47. It is located above the mouth 48.
[0026]
The third washing tank 47 is for further disinfecting the sediment in the second washing tank 33 that has been disinfected in the disinfectant, and when E. coli is not detected in the sediment generated in the second washing tank 33, Can be omitted. A hot water supply port 49 is formed in the upper part of the third cleaning tank 47 so that hot water can be disinfected. In this example, hot water heated to a boiling temperature is supplied from the hot water supply port 49 to the third cleaning tank 47. 47. Microorganisms hidden in the sediment from the second washing tank 33 and not in contact with the disinfectant are also heated by the hot water, so that they can be disinfected by heat. In the third washing tank, a stirrer 51 having a stirring blade 50 is provided, and the material of the crushed disposable diaper of the sediment from the second washing tank 33 is further stirred by the stirring action of the stirrer 51. Unraveled and further disinfected by boiling water.
[0027]
In this example, a perforated plate 53 having an opening of 0.1 mm is provided also in the tank bottom 52 of the third cleaning tank 47, similarly to the second cleaning tank 33. In the third washing tank 47, the material of the crushed disposable diaper that has been disintegrated and disinfected is larger than 0.1 mm, and remains as a sediment on the perforated plate 53 without passing through the opening of the perforated plate 53. The dirt that has adhered to the surface is washed away. Most of the loose dirt is separated through the 0.1 mm opening of the perforated plate 53 because it is smaller than 0.1 mm. The dirt that has passed through the perforated plate 53 is discharged out of the tank via a discharge pipe 54 provided in the tank bottom 52.
[0028]
In the third washing tank 47, the sediment of the material of the disposable diaper settled on the perforated plate 53 becomes a chain having a scraping claw 57 on the outside provided along the upper surface 55 of the perforated plate 53 and the inner wall surface 56 of the tank. It is scraped out by a third sediment raking machine 59 having a conveyor 58 and supplied from its end 60 to a quantitative screw conveyor 61, and is supplied to a wet vibrating sieving machine 62 by the quantitative screw conveyor 61. In this example, an antibacterial agent solution is sprayed on the wet vibrating sieve 62 to prevent clogging and to disinfect and deodorize the discharged material. In this example, a 1% by weight solution of Pansil BA210-1 (manufactured by Release Chemical Industry Co., Ltd., trade name) having an antibacterial function and a deodorant function was used as the antibacterial agent solution.
[0029]
In this example, a sieve with a sieve opening of 10 mm is used as the upper sieve 63, and a sieve with a sieve opening of 5 mm is used as the lower sieve 64. Therefore, in this example, the upper screen of the upper sieve 63 is a material having a particle size of 10 mm or more and mainly including a crushed material of a plastic material film and a crushed material of a nonwoven fabric made of a plastic material. Is more exhausted. The upper sieve of the lower sieve 64 has a particle size of 10 mm to 5 mm and is a material containing a relatively high content of pulp and a relatively low content of a superabsorbent resin. Is more exhausted. The sieve under the lower sieve 64 has a particle size of 5 mm or less, contains pulp at a lower content than the intermediate-stage discharge, and contains a superabsorbent resin at a higher content than the intermediate-stage discharge. This is a material that comes out and is discharged from the lower discharge passage 67.
[0030]
The materials of the crushed disinfected disposable diapers discharged from the upper discharge passage 65 and the intermediate discharge passage 66 are combined and conveyed by the first material discharge conveyor 68. The material of the crushed disinfected diaper discharged from the lower discharge passage 67 is transported by the second material discharge conveyor 69.
The first material discharge conveyor 68 is connected to the centrifugal dewatering device 70, and the material of the crushed disinfected disposable diaper conveyed by the first material discharge conveyor 68 is sent to the centrifugal dewatering device 70 and subjected to centrifugal force to remove water. Are separated.
[0031]
The conveyor 72 of the centrifugal dewatering device 70 is connected to the first hot air dryer 73, and the dehydrated material of the crushed material of the disinfected disinfected disposable diaper is sent to the first hot air dryer 73 by the conveyor 72. And hot air dried. The conveyor 74 of the first hot air dryer 73 is connected to the storage device 75, and the dried material of the crushed disinfected disposable diaper that has been hot air dried by the first hot air dryer 73 is supplied to the first storage device 75. It is sent to 75 and stored. The material stored in the storage device 75 is a material containing a main component of a plastic substance, pulp and a superabsorbent resin, and can be formed into pellets and used for garden sand such as cat sand, solid fuel or piles, sleepers, and the like. Further, the sheet is formed by disposing the sheet between the water-absorbing paper and formed into a sheet, or between a plastic film and a nonwoven fabric made of a plastic material, and the sheet is formed by forming the sheet into a sheet, for example. , A water absorbing sheet, a pet sheet, a plywood, a cushioning material, a roofing sheet, a waste cloth, a building sheet, a pallet material, and an oil absorbing sheet.
[0032]
The second material discharge conveyor 69 is connected to a dehydration tank 78 provided with a supply pipe 77 of powdered calcium chloride as a dehydrating agent, and is conveyed by the second material discharge conveyor 68 to relatively dissolve the gel-like superabsorbent resin. The raw material of the disinfected disposable diaper containing a large amount is supplied to the dewatering tank 78. The dewatering tank 78 is provided with a stirrer inside thereof, a perforated plate having an opening having a hole diameter of, for example, 0.1 mm is provided at the bottom, and powdery calcium chloride of a dehydrating agent is supplied from a calcium chloride supply pipe 77. Is filled. Therefore, the superabsorbent resin in the material of the crushed disposable diaper supplied to the dewatering tank 78 is dehydrated and regenerated with a 5% by weight aqueous solution of calcium chloride under stirring. The transport conveyor 79 of the dewatering tank 78 is connected to the second hot air dryer 80, and the material dehydrated in the dewatering tank 78 is sent to the second hot air dryer 80 and dried by hot air. On the other hand, the calcium chloride used in the dewatering tank 78 absorbs water and becomes a liquid, is discharged from the discharge pipe 81 at the bottom of the dewatering tank 78, joins the discharge passage 26, and forms a wastewater treatment tank (not shown). No.) and the wastewater is treated by, for example, the activated sludge method.
[0033]
The dried material discharge path 82 of the hot air dryer 80 is connected to an inlet 84 of a cyclone type dry classifier 83, and the material dried with the hot air by the hot air dryer 80 is formed by a blower (not shown). Is supplied to the dry classifier 83 through the inlet 84 by the air flow. In the dry classifier 83, an outlet 85 for a light classification component provided in the upper central portion is connected to a flow path 86, and a flow path 88 is connected to an outlet 87 for a heavy classification component. I have. The channel 86 is connected to a second storage device 89. At the top of the second storage device 89, a bag filter 90 is provided to prevent the finely divided classification components from flowing out of the second storage device 89. The light classification component, which has been classified by the dry classifier 83, is a material rich in pulp, and is sent from the channel 86 to the second storage device 89 to be stored. The pulp-rich material is taken out from a take-out conveyor 91 provided at the lower part of the second storage device 89. This pulp-rich material is, for example, placed between water-absorbing paper, or between a plastic film and a nonwoven fabric made of a plastic material, the formed sheet is placed and molded on a sheet, for example, a water-absorbing sheet. , Pet sheets, rags, oil-absorbing sheets, toilet paper, and toilet seat sheets.
[0034]
The channel 88 is connected to a third storage device 92. At the top of the third storage device 92, a bag filter 93 is provided to prevent the finely classified components from flowing out of the third storage device 92. The heavy classification component classified by the dry classifier 83 is a material rich in superabsorbent resin, and is sent from the channel 88 to the third storage device 92 for storage. The material rich in the superabsorbent resin is taken out from a take-out conveyor 94 provided at the lower part of the third storage device 92. The material rich in the superabsorbent resin can be used, for example, as a pellet-shaped soil water retention agent for agriculture and horticulture, cultivation soil for cultivating plants for nursery and horticulture, and the material rich in the superabsorbent resin. Can be placed between water-absorbing papers and formed into a sheet, and used as a water-absorbing sheet for raising seedlings.
[0035]
【The invention's effect】
The present invention crushes a sanitary article to which dirt is attached, disperses the crushed sanitary article in water containing a disinfectant, and removes a part of the dirt attached to the sanitary article to the sanitary article. The material is disinfected from sanitary goods to which dirt is adhered after being separated from the pulverized material, and is washed and collected as a clean product, and the material of the sanitary goods is used effectively. This is to effectively use the discarded sanitary products as raw materials for sanitary products, horticultural products and agricultural products, and to contribute to cost reduction by utilizing the costs required for disposal for the production of effective raw materials. The aim is to use resources effectively and to avoid wasting resources as much as possible. In addition, the amount of processing is enormous, a new industry can be started, and it greatly contributes to society.
[Brief description of the drawings]
FIG. 1 is a process diagram showing an outline of a disinfection process of a treatment apparatus for a soiled disposable diaper according to one embodiment of the present invention.
FIG. 2 is a schematic process diagram of a disinfected soiled diaper processing step in the disposable diaper processing apparatus according to one embodiment of the present invention.
[Explanation of symbols]
1 crusher
2 Upper part of crusher 1
3,11 Supply port
4 sprayer
5 Mist collector
6 Lower part of crusher 1
7 Crushing room, electric motor
8 crushing blade
9 Rotary shock shearing and crushing machine
12 opening and closing damper
13 outlet
14 First belt conveyor
15 First belt conveyor end
16 Crushed material supply chute
17 Second belt conveyor
18 Discharge section
19 First cleaning tank
20 Crushed material supply port
21 Pipe for disinfectant supply
22, 36, 50 stirring blades
23, 37, 51 Stirrer
24, 38, 52 Tank bottom
25, 39, 53 perforated plate
26, 40, 54, 81 Discharge pipe
28, 42, 56 Inside wall of tank
29, 43, 57 scraping nails
30, 44, 58 Chain conveyor
31 First sediment scraper
32, 46 sending end
33 Second cleaning tank
34, 48 Sediment supply port
35 piping
41 Upper surface of perforated plate 39
45 Second sediment scraper
47 Third cleaning tank
49 Hot water supply port
55 Upper surface of perforated plate 53
59 Third sediment scraper
60 End of the third sediment scraper
61 Fixed Screw Conveyor
62 Wet vibrating sieve
63 Upper sieve
64 lower sieve
65 Upper discharge channel
66 Intermediate-stage discharge path
67 Lower discharge passage
68 First Material Discharge Conveyor
69 Second material discharge conveyor
70 Centrifugal dehydrator
72, 74, 79 Conveyor
73 first hot air dryer
75 Storage device
77 Supply pipe
78 Dehydration tank
80 Second hot air dryer
82 discharge path
83 dry classifier
84 Inlet
85 Light classification component outlet
86, 88 channel
87 Heavy classification component outlet
89 Second storage device
90, 93 Bag filter
91, 94 Take-out conveyor
92 Third storage device

Claims

The soiled sanitary goods containing the water-absorbent resin that has become a gel by absorbing water are crushed, and the crushed sanitary goods are dispersed in water containing a disinfectant to remove dirt attached to the sanitary goods. A method for recovering a material from a soiled sanitary article containing a water-absorbent resin which has become a gel by absorbing water, wherein a part of the material is separated from a crushed product of the sanitary article.

The soiled sanitary goods containing the water-absorbent resin that has become a gel by absorbing water are crushed, and the crushed sanitary goods are dispersed in water containing a disinfectant to remove dirt attached to the sanitary goods. Partially separated from the pulverized product of the sanitary article, and then, disperse the pulverized product of the sanitary article, in which a part of the dirt adhered to the sanitary article was separated, in hot water to adhere to the sanitary article. Recovering the material from the soiled sanitary ware containing a water-absorbent resin which has become a gel by absorbing water, characterized in that a part of the remaining dirt is separated from the crushed product of the sanitary ware. Method.

A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant to form a sanitary article. Disintegrate into individual materials of the pulverized material, the water-absorbing resin in a gel state by absorbing water characterized by separating a part of the dirt attached to the sanitary goods from the sanitary goods pulverized material A method for recovering the material from the contained dirty sanitary goods.

A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant. Disintegrating the crushed product of the article into its individual materials, separating some of the dirt adhering to the sanitary article from the crushed article of the sanitary article, and then disposing the crushed article of the sanitary article in boiling water Dispersing, further breaking down the pulverized product of the sanitary product into individual materials of the pulverized product of the sanitary product, and removing a part of the remaining dirt adhering to the sanitary product into the pulverized product of the sanitary product. A method for recovering a material from a contaminated sanitary article containing a water-absorbent resin that has become a gel by absorbing water.

A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant. Then, the pulverized product of the sanitary product is broken up into its individual materials to form a suspension containing the material of the pulverized product of the sanitary product, and the suspension is filtered and adhered to the sanitary product. A method of recovering a material from a soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water, characterized in that a part of the soil that has been used is separated from the material of the ground product of the sanitary article. .

A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant. Disintegrating the pulverized product of the sanitary product into its individual materials to form a suspension containing the material of the pulverized product of the sanitary product, and filtering the suspension to adhere to the sanitary product; Part of the soil was separated from the material of the pulverized material of the sanitary article, and then, the filtration residue is dispersed in hot water to form a hot water suspension containing the material of the pulverized product of the sanitary article, The hot water suspension is filtered, and a part of the remaining dirt attached to the sanitary ware is separated from a crushed product of the sanitary ware. A method for recovering the material from dirty sanitary goods containing a water-absorbent resin.

A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant. Then, the pulverized material of the sanitary article is broken into individual materials to form a suspension containing the material of the pulverized material of the sanitary article. Contains a water-absorbent resin that absorbs water and is characterized by separating a part of the dirt adhering to the sanitary goods from the material of the crushed sanitary goods by filtering with the following filter media. How to recover the material from dirty sanitary goods.

Dirty sanitary goods containing a water-absorbent resin that has become a gel by absorbing water are crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary goods are dispersed in water containing a disinfectant. Then, the pulverized material of the sanitary article is broken up into its individual materials to form a suspension containing the material of the pulverized material of the sanitary article, and the suspension is formed with a pore having an opening of 1 mm or less. To separate a part of the dirt adhering to the sanitary ware from the material of the crushed sanitary ware, and then disperse the filtration residue in hot water to remove the crushed sanitary ware. A hot water suspension containing the raw material is formed, and the hot water suspension is filtered through a filter medium having a pore size of the filter medium of 1 mm or less, and a part of the remaining dirt adhered to the sanitary article. Water-absorbent resin which is gelled by absorbing water, wherein the water-absorbent resin is separated from ground products of the sanitary article. Method of recovering the material from hygiene articles dirty containing.

Dirty sanitary goods containing a water-absorbent resin that has become a gel by absorbing water are crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary goods are dispersed in water containing a disinfectant. Then, the pulverized product of the sanitary product is broken up into individual materials to form a suspension containing the material of the pulverized product of the sanitary product, and the suspension is formed with a pore having an opening of 1 mm or less. Part of the dirt adhering to the sanitary ware is separated from the ground material of the sanitary ware by filtering through a filter medium, and the filtered residue is then sprayed with a disinfectant solution through a sieve having a pore size of 5 to 10 mm. Sieving to a pulp material and a sieved product of a crushed product of a sanitary article mainly containing a water-absorbent resin, and a sieved product of a crushed product of a sanitary article mainly containing a plastic substance, Contains water-absorbent resin that is gelled by water absorption That dirty the material method of recovery from the hygiene products.

Dirty sanitary goods containing a water-absorbent resin that has become a gel by absorbing water are crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary goods are dispersed in water containing a disinfectant. Then, the pulverized product of the sanitary product is broken up into individual materials to form a suspension containing the material of the pulverized product of the sanitary product, and the suspension is formed with a pore having an opening of 1 mm or less. Filtering with a filter medium, a part of the dirt attached to the sanitary goods is separated from the material of the crushed sanitary goods, and then the material of the crushed sanitary goods of the filtration residue is dispersed in boiling water, A hot water suspension containing a crushed material of sanitary goods is formed, and the hot water suspension is filtered through a filter medium having a filter material having a pore opening of 1 mm or less to remove dirt attached to the sanitary goods. A part of the remainder is separated from the pulverized product of the sanitary product, and the filtration residue of the hot water suspension is separated into pores having a pore size. Sieved under a spray of a disinfectant solution with a sieve of 10 to 10 mm to obtain a sieved product of a crushed product of sanitary goods mainly containing pulp material and water-absorbent resin, and a sieved product of a sanitary goods mainly containing plastic substances. A method for recovering raw materials from a soiled sanitary article containing a water-absorbent resin which has become a gel by absorbing water, wherein the raw material is separated from a sieved product.

Dirty sanitary goods containing a water-absorbent resin that has become a gel by absorbing water are crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary goods are dispersed in water containing a disinfectant. Then, the pulverized material of the sanitary article is disintegrated into individual materials to form a suspension containing the material of the pulverized material of the sanitary article. Part of the dirt adhering to the sanitary goods is separated from the material of the crushed sanitary goods by filtering with the following filter medium, and the filtered residue is subjected to antibacterial treatment with a sieve having a sieve of 5 to 10 mm. Particle size separation under spraying of the dispersant solution to separate into a sieved product mainly containing pulp material and water absorbent resin and a sieved product mainly containing plastic substance, and then mainly containing pulp material and water absorbent resin Dried product obtained by drying the sieved product It contains a water-absorbent resin that is gelled by absorbing water, which is subjected to dry classification and is separated into a classified product having a large pulp content and a classified product having a small pulp content than the classified product. How to recover the material from dirty sanitary items.

A soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water is crushed to a particle size of 50 mm or less in the presence of a disinfectant, and the crushed sanitary article is dispersed in water containing a disinfectant. Then, the pulverized material of the sanitary article is disintegrated into individual materials to form a suspension containing the material of the pulverized material of the sanitary article. Filtration with the following filter medium, a part of the dirt attached to the sanitary goods is separated from the material of the pulverized material of the sanitary goods, the filtration residue is dispersed in hot water, A hot water suspension containing the raw material is formed, and the hot water suspension is filtered through a filter medium having a pore size of the filter medium of 1 mm or less, and a part of the remaining dirt adhered to the sanitary article. Is separated from the pulverized product of the sanitary ware, and the filtration residue of the hot water suspension is filtered with a sieve having an opening of 5 to 10 mm. Particle size separation under spraying of the antibacterial agent solution in the pulp material and a sieved product mainly containing a water-absorbent resin, and a sieved product mainly containing a plastic substance, and then the pulp material and the water-absorbent resin Mainly containing sieved product is dried, and the obtained dried product is subjected to dry classification to separate into a classified product having a large pulp content and a classified product having a smaller pulp content than the classified product. A method for recovering a material from a contaminated sanitary article containing a water-absorbent resin which has become a gel by absorbing water.

Dirty sanitary goods containing a water-absorbent resin that has become a gel by absorbing water include dirty paper diapers, dirty milk pads, dirty urine pads, dirty sheets, dirty gauze, dirty bandages or dirty absorbent cotton. Or a set of two or more of these sanitary articles, from a dirty sanitary article containing a water-absorbent resin that has become a gel by absorbing water according to any one of claims 1 to 12. Material collection method.

2. The disinfectant is ozone, chlorine, sodium hypochlorite, calcium hypochlorite, lithium hypochlorite, chlorine dioxide, chlorinated isocyanuric acid, chloramine B or chloramine T. 13. A method for recovering a raw material from a soiled sanitary article containing a water-absorbent resin that has become a gel by absorbing water according to any one of claims 12 to 12.

The water-absorbing gel-like product according to any one of claims 1 to 12, wherein the soiled sanitary goods containing the water-absorbent resin that has become a gel by water absorption is a used disposable diaper. A method for recovering a material from a dirty sanitary article containing a water absorbent resin.

13. The water-absorbent resin which has become a gel by absorbing water according to any one of claims 1 to 12, wherein dead Escherichia coli is attached to the material of the recovered sanitary goods. How to recover the material from dirty sanitary goods.