JP4176312B2

JP4176312B2 - Activated carbon pack for water purifier

Info

Publication number: JP4176312B2
Application number: JP2001010085A
Authority: JP
Inventors: 宗之岩渕; 元重水野
Original assignee: NGK Insulators Ltd
Current assignee: NGK Insulators Ltd
Priority date: 2001-01-18
Filing date: 2001-01-18
Publication date: 2008-11-05
Anticipated expiration: 2021-01-18
Also published as: JP2002210456A

Description

【０００１】
【発明の属する技術分野】
本発明は、原水を浄水にろ過したり原水中よりトリハロメタンなどの有害物を除去するために使用する浄水器に使用する活性炭パックに関するものである。
【０００２】
【従来の技術】
従来から固形状で飛散することが少なく取扱いが容易であるが、高価な繊維状活性炭、成形活性炭に代わり、安価であるが粒状でそのままでは取扱いが難しい活性炭をケ−ス内に充填して活性炭パックとし、活性炭の交換の際、前記活性炭パックを一体として交換することで、活性炭の飛散が無く、取扱いを容易にする技術が知られている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述した活性炭パックにおいて、活性炭パック内の活性炭の充填の方法によっては、充填した活性炭のろ過機能あるいは有害物を除去する機能が十分に発揮できない問題があった。特に、充填した活性炭が活性炭パック外に漏れたり、活性炭が活性炭パックの中で密に充填されないために流入した原水が活性炭層の中の隙間を通過し、いわゆるショ−トパスを起こしたり、密に充填されていても流入した原水が活性炭層を流入口の断面積とほぼ同等断面のパイプ状に流出側に向かってショ−トパスし、活性炭の無作用部分が増大することで、活性炭が保有する所期の機能が得られない問題があった。またこの様な状態の場合、前記パイプ状のショ−トパス部分には過剰の有害物が吸着されており、浄水器使用当初にこれら吸着された有害物が再度浄水中に溶出し、飲用した場合人体に有害となる問題があった。
【０００４】
本発明の目的は上述した課題を解消して、活性炭パック中の活性炭層全体に原水が均一に分散し、活性炭層での原水のショ−トパス部が無く、原水中の有害物を確実に補足し、かつ寸法が小さく組立と浄水器との接続が容易な浄水器用活性炭パックを提供しようとするものである。
【０００５】
【課題を解決するための手段】
本発明の浄水器用活性炭パックの第１発明は、有底円筒形状で底部中央に原水流入孔を有するケ−スに、ケ−スの底から不織布、活性炭、スポンジ、不織布を順にセットし、ケ−スの開口部を複数の開口孔を有する蓋で閉止し一体化し、円筒形状のケ−スの底部中央の原水流入孔が、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の開口面積を有すると共に、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の面積を有しかつ前記円筒形状のケ−スの底部中央の原水流入孔より径が小さい円板のじゃま板を前記原水流入孔に対応して設け、円筒形状のケースの底部にじゃま板より外径に向かって傾斜的に流体流路が増加する様に、ケース底部の原水流入孔以外の部分に設けた放射状リブ、および、原水流入孔に設けられ、じゃま板を支持するためのリブ、を配設したことを特徴とするものである。
【０００６】
また、本発明の浄水器用活性炭パックの第２発明は、有底円筒形状で底部中央に原水流入孔を有するケ−スに、ケ−スの底から不織布、活性炭、スポンジ、不織布を順にセットし、ケ−スの開口部を中心に開口孔を有する蓋で閉止し一体化し、円筒形状のケ−スの底部中央の原水流入孔が、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の開口面積を有すると共に、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の面積を有しかつ前記円筒形状のケ−スの底部中央の原水流入孔より径が小さい円板のじゃま板を前記原水流入孔に対応して設け、円筒形状のケースの底部にじゃま板より外径に向かって傾斜的に流体流路が増加する様に、ケース底部の原水流入孔以外の部分に設けた放射状リブ、および、原水流入孔に設けられ、じゃま板を支持するためのリブ、を配設したことを特徴とするものである。
【０００７】
本発明では、ケース内における活性炭およびその他の構成部材の配置を、上流側から、不織布、活性炭、スポンジ、不織布の順にすることで、活性炭の能力を最大限に活かすことができる浄水器用活性炭パックを得ることができる。
【０００８】
本発明の好適な具体例の一例として、円筒形状のケ−スの底部中央の原水流入孔が、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の開口面積を有すると共に、円筒形状のケ−スの底部より外径に向かって傾斜的に流体流路が増大する様に前記ケ−スの底部に放射状リブを配設し、さらに活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の面積を有しかつ前記円筒形状のケ−スの底部中央の原水流入孔より径が小さい円板のじゃま板を前記放射状リブに連結させる。この例では、原水を活性炭により均一に供給できるため好ましい。
【０００９】
また、第１発明の他の例として、複数の開口孔を有する蓋において、前記有底円筒形状のケ−スの底部の原水流入孔に対応する部分に、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の面積を有する円板状の未開口部を設け、さらに前記無開口部より外径に向かって傾斜的に原水通過面積が増加する様に複数の開口孔を設ける。この例では、原水が活性炭をより均一に通過するため好ましい。
【００１０】
さらに、第２発明の他の例として、中心に開口孔を有する蓋の前記開口孔が、活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の開口面積を有すると共に、前記蓋の端面部に外径に向かって傾斜的に流体流路が増大する様に放射状リブを配設し、さらに活性炭層で原水が通過する方向に直角な面の断面積の１６〜３０％の面積を有しかつ前記蓋の開口孔より径が小さい円板のじゃま板を前記放射状リブに連結する。この例でも、原水が活性炭をより均一に通過するため好ましい。
【００１１】
さらにまた、他の例として、ケ−スの開口部を閉止する複数の開口孔を有する蓋あるいは中心に開口孔を有する蓋のいずれかと、有底円筒形状で底部中央に原水流入孔を有するケ−スにおいて、不織布の外周部が当接する部分に円周状の凸部を設け、前記凸部で不織布を超音波溶着するか、または、活性炭層がスポンジにより４〜３０ｋＰａにて軸方向に押圧されている構成とする。いずれの例でも、活性炭のケース内への充填をより確実に行うことができ、活性炭の漏れを防止できるため好ましい。
【００１２】
また、他の例として、円筒形状のケ−スの底部中央の原水流入孔、および中心に開口孔を有する蓋の前記開口孔において、原水流入孔内壁と前記じゃま板に連結したリブを設ける。この例でも、原水を活性炭にさらにより均一に供給できるため好ましい。
【００１３】
【発明の実施の形態】
図１は本発明の浄水器用活性炭パックの部品の構成を示す図であり、図２は図１に示す構成部品を組立てて一体化した状態を示す図である。図１に示す例において、本発明の浄水器用活性炭パック１は、有底円筒形状で例えばＰＰ樹脂からなり底に原水流入孔２を有するケ−ス３、不織布４、図示しない活性炭、スポンジ６、不織布７、ＰＰ樹脂からなる蓋８より構成される。不織布４はケ−ス底部から活性炭をケ−ス３の外に漏洩させないためのものであり、ケ−ス３に確実に固定し不織布４の外周部でケ−ス３との未固定部が無い様にする必要がある。この目的のためには不織布４をＰＰ樹脂製のケ−ス３の底部で超音波溶着することが加工速度が早く安価となるため好ましいが、溶着面積が大きいと溶着に必要な超音波動力も大となるので、図１の１０ａに示す様に凸部を設け、この部分でのみ溶着している。同様理由で蓋８にも凸部１０ｂが設けてある。
【００１４】
組立方法としてはまず不織布４、７をそれぞれケ−ス３、蓋８に溶着した後、図２に示す様に活性炭５を所定量投入し、さらに活性炭５がケ−ス３の内部で移動して原水がショ−トパスしない様にするためと、蓋８をケ−ス３に取付ける時にケ−ス３に投入した活性炭が飛散しない様にするための活性炭上部の被覆材としてスポンジ６をセットした後、蓋８をケ−ス３に嵌合させた後、ケ−スの開口部３ａのフランジ部１６でケ−ス３と蓋８を超音波溶着し全体を一体化させる。原水はケ−ス３の底部の原水流入孔２から不織布４、活性炭５、スポンジ６、不織布７を順に透過し、図３（図２において蓋８をＣ方向から見た図）に示す蓋８に設けた複数の開口孔１４より浄水を得ることができる。また、浄水器内での固定方法を適宜検討すれば、逆の方向の流れももちろん可能である。
【００１５】
活性炭パック１中の活性炭５が原水中の有害物をどの程度除去できるかは、例えば、一定量の塩素を溶解させた試験水を活性炭パック１中に導入し、活性炭パック１から流出する試験水中の遊離残留塩素濃度が、所定の基準値以上になるまでの積算通水量にて評価され、活性炭パックの性能が好適であれば積算通水量も大、従って多量の原水の処理に使用できることとなる。本発明においては、水道水中に次亜塩素酸ソ−ダを水道中の遊離残留塩素が１ｐｐｍになる様に溶解させ、流出水の遊離残留塩素濃度が０．０５ｐｐｍ（９５％除去）以上になるまでの積算通水量を計測し、各特性を評価してある。また、活性炭パック１が原水中の有害物の除去できる性能の最大値としては、円筒状のパイプに充填した活性炭５による前記方法の積算通水量となる。ここで円筒状のパイプとした理由は、パイプ中に充填した活性炭であれば、活性炭層も均一に理想的な充填ができ、また活性炭に流入する前でのパイプ中の流れの縮流、偏流、うずなどが少なく、活性炭全体が原水中の有害物に除去に適用できるためで、この値が有害物除去に関する所定容量の活性炭能力の基準値となる。
【００１６】
粒状活性炭の粒度は浄水器に使用する場合は、原水に暴露する表面積の確保と、活性炭パックに充填する時のし易さから通常３０〜１５０メッシュのものが採用される。この粒度より小さいと表面積は増大するが、充填の際に活性炭パックより飛散し易く、またこの粒度より大きくすると活性炭粒子間の隙間が大きくなり、原水中の有害物が除去されずに原水が活性炭パックの外に流出するショ−トパスが発生し易くなる。また活性炭パックの中で活性炭が自由に移動する様な粗充填を行うと、原水が導入された場合に前記ショ−トパスが発生し、所期の特性が確保できなくなる。以下の表１はスポンジ６の圧縮しろを変化させ、活性炭５を活性炭パック１の軸方向に押圧する力を変化させた場合に、測定範囲における積算通水量と単位時間透水量の結果の最大値を１００％として比較した結果を示す。
【００１７】
【表１】

【００１８】
表１の結果より活性炭を押圧する力を４〜３０ｋＰａとすると積算通水量が前記最大値に近い値となる。４ｋＰａ以下であると透水量は大となるが、ショ−トパスが発生し易くスポンジ６の効果が無くなり、また３０ｋＰａ以上であるとケ−ス３への蓋８の取付けが困難となるばかりでなく、活性炭パック自体の変形・膨圧が発生し、さらにスポンジ６が密となり、活性炭パック１から流出する浄水の量が低下する問題が発生することがわかる。
【００１９】
活性炭パック１のケ−ス３は中心部に原水流入孔２が開孔してあるが、かかる活性炭パック１は浄水器本体に対し液密に接続する必要があり、図示しないが例えば原水が流入する原水流入孔２の外周にＯリングなどを取付け、浄水器本体に接続される。Ｏリングのシ−ル性能はＯリングの径が小さい即ち原水流入孔２の径が小さいほど良く、また活性炭パック１を接続する場合に必要な力も小さくでき、さらにＯリングの寸法が小さいのでコストも低くできる。このためケ−ス３の形状は図１、図２に示す様に浄水器本体への接続の容易さより、有底状の円筒部の中心から原水流入孔２が円筒形状をなすケ−ス３の底部から外に向かって突出する形状が広く採用されている。
【００２０】
図４に示す直径が８０ｍｍで長さが５０ｍｍの活性炭２２を有し、かつ活性炭２２の前部での原水の偏流、うずをさけるために、ｈ寸法を３０ｍｍとした活性炭パック２１を準備し、前記評価方法にて原水中の遊離残留塩素と積算通水量を測定した結果、原水流入孔２３の径より活性炭２２の径は大であるので、原水流入孔２３より流入した原水は流入孔２３の径をほとんど維持したまま活性炭２２に流入し、活性炭中をパイプ状に通過してから、そのまま活性炭パック２１の外に流出し、活性炭２２の外径側には原水中の有害物の除去に有効に寄与しない無作用部が存在することが判明した。このためには図１に示す様なじゃま板１３を設けることが効果的であり、活性炭の流れ方向の直角断面の径を１００％としてじゃま板１３の径を変化させ、かつ原水流入孔２３の内径はじゃま板１３と同一として、前記試験を実施した結果を表２に示す。
【００２１】
【表２】

【００２２】
表２の結果より、活性炭５の径に対し、１６〜３０％の径のじゃま板１３とすると良好な積算通水量値を得、活性炭層中を原水が原水流入孔２の径のまま通過することが無いことが判明した。じゃま板１３をケ−ス３と一体に製作するためには、じゃま板１３とケ−ス３の接続部に金型のアンダ−カットを無くすことができるので、じゃま板１３の径は原水流入孔２の内径と同等かわずかに小とすることが好ましい。じゃま板の径が１６％以下であると原水流入孔２の径が小さくなり、流入する速度が増加し、活性炭５の前部での流れの乱れが大となる。またじゃま板１３の径を３０％より大とすると、連動して原水流入孔２の径も増大し、前記の如く、原水流入孔２と浄水器本体との接続部のシ−ル性が低下し、かつ必要なシ−ル部材のコストも増加する問題が発生する。
【００２３】
またじゃま板１３は図５（図１においてケース３の底部をＡ方向から見た図）および図６（図１においてケース３の底部をＢ方向から見た図）に示す様に、原水流入孔２の内部に連結されたリブ１１Ｃに接続することで、活性炭パック１の軸方向に位置を固定すると、流入した原水を整流しながら活性炭層に分配できると共に、じゃま板１３が原水流入孔２より流入した原水の速度や、活性炭５からの押圧力により変形することが少なく、さらに浄水器本体との接続に際しては、原水流入孔２の円筒部の形状と強度を保持できＯリングなどのシ−ル部材を確実に保持でき、良好な止水部を確保できるので好ましい。
【００２４】
じゃま板１３により流れの向きを変えた原水は、活性炭５に流入するが活性炭５の前部で原水の乱れを少なくするため、図２に示すｈ寸法を大きくする事は、活性炭パック１自体の軸方向寸法が大となり、浄水器が大きくなるばかりでなく活性炭パック１に必要な材料も増加しコストも増大する。このために活性炭５に流入する部分の単位面積あたりの原水通過面積を各種に変化させ、前記評価法により活性炭パック１としての特性を評価した結果を表３に示す。ここで例えば図７によれば、Ｐの部分は活性炭の軸方向端部の全面に原水が流入することを示し、Ｑの部分は外周に向かって単位面積あたりの原水通過面積が増大している状況を示し、Ｑを積分すると本発明の例の全原水通過面積となることを示し、比較のための図８、図９に示すＱ部を積分した値も図７のＱを積分した値と同等、従って同一原水通過面積で分布を変えた場合の積算通水量を評価した。
【００２５】
【表３】

【００２６】
表３の結果より、円筒形状のケ−スの底部にじゃま板１３より外径に向かって傾斜的に流体流路が増大する様に放射状リブを配設する構成が最も積算通水流量を大とすること、すなわち活性炭５の全体を効果的に原水中の有害物除去に使用できることがわかる。これを実現するには、図５、図６に示す様にリブ１１ａ、１１ｂ、１１ｃをケ−ス３の底面に配設することが好ましい。またリブ１１ａはじゃま板１３を固定するために原水流入孔２の内径に連結したリブ１１ｃと兼用しても良い。
【００２７】
活性炭５を通過した浄水が活性炭パック１から流出する場合も、ケ−ス３と同様に原水の流れの偏流や活性炭５の中の無作用部を低減するために、蓋８の中心部にケ−ス３のじゃま板１３に相当する無開孔部を設け、さらに前記無開孔部の外周に複数の孔を設けることが好ましい。図３はかかる発明の実施例を示した図で、φ部が無開孔部であり複数の開口孔１４が無開孔部の回りに配設してあり。図１０はケ−ス３の底部に同様な作用効果がある多孔板を設置した例を示し、多孔板１５は図３に示す蓋８の態様と同様な孔配置を有し、不織布１４が活性炭５側に超音波溶着されている。この場合多孔板１５の中心を無開孔部とすれば、じゃま板１３は必要でなくなるが、多孔板１５の中心を保持するためにケ−ス３のじゃま板１３は設置しても良い。
【００２８】
上述した活性炭パックでは、図３に示すように浄水の流出側に複数の開口孔１４を配設した例を示したが、浄水器の構造によれば、活性炭パックの原水の流入口および浄水の流出口の両方が、図５及び図６に示した原水流入孔２の形状をしていることが良い場合もあり、図１１はこの実施例を示す図であり、また図１２は図１１に使用するじゃま板３３を備える蓋３１を示す図である。図１、図２に示すケ−ス３と同様な機能を有する蓋３１に不織布７を超音波溶着させ、さらにケ−ス３のフランジ部１６でケ−ス３と蓋３１を超音波溶着させ、活性炭パックとして一体化してある。さらに図１１に示す実施例ではスポンジ６の近傍にコ−ラルサンドの粒３２を投入し、活性炭５によりうまみ成分までも除去された原水にカルシウムなどのイオンを再添加し上部より浄水を流出させる。図１１に示す構成で浄水器との接続関係より、上部より原水を導入し、下部より浄水を排出させる場合は、コ−ラルサンド３２はケ−ス３の底部の不織布４の上面に投入する。
【００２９】
以上に説明した態様は、活性炭パック中の流れの状況よりφ１５０ｍｍで長さが２００ｍｍまでの原水の流入孔が１個の浄水器用活性炭パックに適用できるが、活性炭パックの形状は前述した実施例に示す様な、円筒形状のみでなく流入孔、流出孔の配置を考慮すれば、断面が楕円形、多角形、または浄水器の形状に合わせた異形のものでも本発明は適用できる。
【００３０】
さらに上述した実施例において、各部の材質などは従来から浄水器用として知られている材料が使用できる。一例として、活性炭５としては、粒度４８〜１００メッシュのクラレケミカル（株）製の型番Ｔ−ＳＢ４８／１００を、不織布４、７、１４、２０としては日本バイリ−ン（株）製の型番ＯＲ−１２５を、コ−ラルサンド１９としてはコ−ラルバイオテック（株）製の粒度１０〜２４のＲＦ−１（１０／２４）をそれぞれ使用することができる。
【００３１】
【発明の効果】
以上の説明から明らかなように、本発明によれば、ケース内における活性炭およびその他の構成部材の配置を、上流側から、不織布、活性炭、スポンジ、不織布の順にしているため、活性炭の能力を最大限に活かすことができる浄水器用活性炭パックを得ることができる。
【図面の簡単な説明】
【図１】本発明による浄水器用活性炭パックの部品の一構成を示す図である。
【図２】図１に示す部品を組み立てた状態を示す図である。
【図３】図２に示す蓋をＣ方向から見た図である。
【図４】原水流通試験において使用した活性炭パックの一例の構成を示す図である。
【図５】図１に示すケースをＡ方向から見た図である。
【図６】図１に示すケースをＢ方向から見た図である。
【図７】本発明例における活性炭直径及びじゃま板直径と単位面積あたりの原水通過面積との関係の一例を示す図である。
【図８】比較例における活性炭直径及びじゃま板直径と単位面積あたりの原水通過面積との関係の一例を示す図である。
【図９】比較例における活性炭直径及びじゃま板直径と単位面積あたりの原水通過面積との関係の他の例を示す図である。
【図１０】本発明の浄水器用活性炭パックの他の例の構成を示す図である。
【図１１】本発明の浄水器用活性炭パックのさらに他の例の構成を示す図である。
【図１２】図１１に使用する蓋の構成を示す図である。
【符号の説明】
１浄水器用活性炭パック、２、２３原水流入孔、３ケース、３ａ開口部、４、７不織布、５、２２活性炭、６スポンジ、８、３１蓋、１０ａ、１０ｂ凸部、１１ａ、１１ｂ、１１ｃリブ、１３、３３じゃま板、１４開口孔、１５多孔板、１６フランジ部、２１活性炭パック、３２コーラルサンドの粒[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an activated carbon pack used for a water purifier used for filtering raw water into purified water or removing harmful substances such as trihalomethane from raw water.
[0002]
[Prior art]
Conventionally, it is easy to handle with little solid scattering, but instead of expensive fibrous activated carbon and molded activated carbon, the activated carbon is filled with activated carbon that is cheap but granular and difficult to handle as it is. A technique is known in which the activated carbon pack is exchanged as a unit when the activated carbon is replaced, and the activated carbon is not scattered and the handling is facilitated.
[0003]
[Problems to be solved by the invention]
However, the above-described activated carbon pack has a problem that the function of filtering the activated carbon filled or the function of removing harmful substances cannot be sufficiently exhibited depending on the method of filling the activated carbon in the activated carbon pack. In particular, the filled activated carbon leaks out of the activated carbon pack, or since the activated carbon is not closely packed in the activated carbon pack, the raw water that has flowed in passes through the gap in the activated carbon layer, causing a so-called short path, Even if it is filled, the raw water that has flowed in will short-circuit the activated carbon layer in the shape of a pipe with a cross-sectional area approximately equal to the cross-sectional area of the inlet toward the outflow side. There was a problem that the desired function could not be obtained. In such a state, excessive harmful substances are adsorbed on the pipe-shaped short path portion, and these adsorbed harmful substances elute again into the purified water when used in the water purifier, and are drunk. There was a problem that was harmful to the human body.
[0004]
The object of the present invention is to solve the above-mentioned problems, and the raw water is uniformly dispersed throughout the activated carbon layer in the activated carbon pack, there is no short path portion of the raw water in the activated carbon layer, and harmful substances in the raw water are reliably supplemented. However, the present invention intends to provide an activated carbon pack for a water purifier which has a small size and can be easily assembled and connected to the water purifier.
[0005]
[Means for Solving the Problems]
In the first aspect of the activated carbon pack for water purifiers of the present invention, a non-woven fabric, activated carbon, sponge and non-woven fabric are set in this order from the bottom of the case to a case having a bottomed cylindrical shape and having a raw water inflow hole at the bottom center. -Close and integrate the opening of the case with a lid having a plurality of openings, and the raw water inflow hole in the center of the bottom of the cylindrical case has a cross-sectional area perpendicular to the direction in which the raw water passes through the activated carbon layer. and it has a open area of 16-30%, Ke of a and the cylindrical area of 16 to 30% of the cross sectional area of a plane perpendicular to a direction passing through the raw water activity coalbed - scan the center of the bottom of raw water A circular baffle with a smaller diameter than the inflow hole is provided in correspondence with the raw water inflow hole, and the bottom of the cylindrical case has a fluid flow path that is inclined from the baffle toward the outer diameter. radial ribs, and raw water stream provided in a portion other than the water inlet holes in the bottom Provided in the hole, it is characterized in that it has provided a rib, for supporting the baffle plate.
[0006]
Moreover, the second invention of the activated carbon pack for water purifiers of the present invention is to set a non-woven fabric, activated carbon, sponge, non-woven fabric in order from the bottom of the case to a case having a bottomed cylindrical shape and having a raw water inflow hole at the bottom center. The case is closed and integrated with a lid having an opening hole around the opening of the case, and the raw water inflow hole in the center of the bottom of the cylindrical case is cut off in a plane perpendicular to the direction in which the raw water passes through the activated carbon layer. which has 16 to 30% open area of the area of a and the cylindrical area of 16 to 30% of the cross sectional area of a plane perpendicular to a direction passing through the raw water activity coalbed Ke - scan the bottom center A baffle plate having a diameter smaller than that of the raw water inflow hole is provided in correspondence with the raw water inflow hole so that the fluid flow path increases in an inclined manner toward the outer diameter from the baffle plate at the bottom of the cylindrical case. , radial ribs provided in a portion other than the water inlet hole of the case bottom and, Provided in the water inlet, it is characterized in that it has provided a rib, for supporting the baffle plate.
[0007]
In the present invention, the activated carbon pack for water purifier that can make the best use of the ability of activated carbon by arranging the arrangement of activated carbon and other components in the case in the order of nonwoven fabric, activated carbon, sponge, nonwoven fabric from the upstream side. Obtainable.
[0008]
As an example of a preferred specific example of the present invention, the raw water inflow hole at the center of the bottom of the cylindrical case has an opening area of 16 to 30% of the cross-sectional area of the surface perpendicular to the direction in which the raw water passes through the activated carbon layer. In addition, radial ribs are arranged at the bottom of the case so that the fluid flow path is inclined from the bottom of the cylindrical case toward the outer diameter, and the raw water passes through the activated carbon layer. A circular baffle having an area of 16 to 30% of a cross-sectional area of a plane perpendicular to the direction and having a diameter smaller than that of the raw water inlet at the center of the bottom of the cylindrical case is connected to the radial rib. This example is preferable because the raw water can be supplied uniformly by activated carbon.
[0009]
As another example of the first invention, in the lid having a plurality of opening holes, the raw water passes through the activated carbon layer in the direction corresponding to the raw water inflow hole at the bottom of the bottomed cylindrical case. A disc-shaped non-opening having an area of 16 to 30% of the cross-sectional area of the right-angled surface is provided, and a plurality of openings are provided so that the raw water passage area increases in an inclined manner toward the outer diameter from the non-opening. Make a hole. In this example, the raw water is preferable because it passes through the activated carbon more uniformly.
[0010]
Furthermore, as another example of the second invention, the opening hole of the lid having an opening hole in the center has an opening area of 16 to 30% of the cross-sectional area of the surface perpendicular to the direction in which the raw water passes through the activated carbon layer. Further, radial ribs are disposed on the end face of the lid so that the fluid flow path increases in an inclined manner toward the outer diameter, and further, the cross-sectional area of the surface perpendicular to the direction in which the raw water passes through the activated carbon layer is 16 to 30 %, And a baffle plate having a diameter smaller than the opening hole of the lid is connected to the radial rib. This example is also preferable because the raw water passes through the activated carbon more uniformly.
[0011]
Furthermore, as another example, either a lid having a plurality of opening holes for closing the opening of the case or a lid having an opening hole in the center, and a case having a bottomed cylindrical shape and a raw water inflow hole in the center of the bottom. -In the case where the outer peripheral portion of the nonwoven fabric is in contact with the outer peripheral portion, a circumferential convex portion is provided, and the nonwoven fabric is ultrasonically welded with the convex portion, or the activated carbon layer is pressed in the axial direction at 4 to 30 kPa with a sponge. The configuration is as follows. In any case, it is preferable because the case can be more reliably filled with activated carbon and leakage of the activated carbon can be prevented.
[0012]
As another example, a rib connected to the inner wall of the raw water inflow hole and the baffle plate is provided in the raw water inflow hole at the bottom center of the cylindrical case and the opening hole of the lid having an opening hole in the center. This example is also preferable because the raw water can be more uniformly supplied to the activated carbon.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing the configuration of parts of the activated carbon pack for water purifier of the present invention, and FIG. 2 is a diagram showing a state where the components shown in FIG. 1 are assembled and integrated. In the example shown in FIG. 1, the activated carbon pack 1 for water purifier of the present invention has a bottomed cylindrical shape, for example, made of PP resin and having a raw water inflow hole 2 at the bottom, a nonwoven fabric 4, activated carbon (not shown), sponge 6, It is comprised from the nonwoven fabric 7 and the lid | cover 8 which consists of PP resin. The nonwoven fabric 4 is for preventing the activated carbon from leaking out of the case 3 from the bottom of the case. The nonwoven fabric 4 is securely fixed to the case 3 and the non-fixed portion with the case 3 is fixed to the outer periphery of the nonwoven fabric 4. It is necessary not to have it. For this purpose, it is preferable to ultrasonically weld the nonwoven fabric 4 at the bottom of the case 3 made of PP resin because the processing speed is fast and inexpensive. However, if the welding area is large, the ultrasonic power necessary for welding is also increased. Since it becomes large, a convex portion is provided as shown by 10a in FIG. 1, and welding is performed only at this portion. For the same reason, the lid 8 is also provided with a convex portion 10b.
[0014]
As an assembling method, first, the

nonwoven fabrics

4 and 7 are welded to the case 3 and the lid 8, respectively, and then a predetermined amount of activated carbon 5 is charged as shown in FIG. 2, and the activated carbon 5 moves inside the case 3. Sponge 6 was set as a covering material for the upper part of the activated carbon so that the raw water was not short-passed and the activated carbon charged into the case 3 was not scattered when the lid 8 was attached to the case 3. Then, after the lid 8 is fitted to the case 3, the case 3 and the lid 8 are ultrasonically welded by the flange portion 16 of the opening 3a of the case, and the whole is integrated. The raw water sequentially passes through the raw water inflow hole 2 at the bottom of the case 3 through the non-woven fabric 4, the activated carbon 5, the sponge 6 and the non-woven fabric 7, and the lid 8 shown in FIG. Purified water can be obtained from the plurality of opening holes 14 provided in. Moreover, if the fixing method in a water purifier is examined suitably, the flow of the reverse direction is also possible of course.
[0015]
The extent to which the activated carbon 5 in the activated carbon pack 1 can remove harmful substances in the raw water is determined by, for example, introducing test water in which a certain amount of chlorine is dissolved into the activated carbon pack 1 and flowing out of the activated carbon pack 1 If the concentration of free residual chlorine in the activated carbon pack is evaluated until the free residual chlorine concentration exceeds a predetermined reference value, and the performance of the activated carbon pack is suitable, the integrated water flow rate is large, and therefore, it can be used for the treatment of a large amount of raw water. . In the present invention, sodium hypochlorite is dissolved in tap water so that the free residual chlorine in the water becomes 1 ppm, and the free residual chlorine concentration in the effluent becomes 0.05 ppm (95% removed) or more. The accumulated water flow up to is measured and each characteristic is evaluated. In addition, the maximum value of the performance by which the activated carbon pack 1 can remove harmful substances in the raw water is the integrated water flow rate of the above method using the activated carbon 5 filled in the cylindrical pipe. The reason why the cylindrical pipe is used here is that if the activated carbon is filled in the pipe, the activated carbon layer can be uniformly filled ideally, and the flow in the pipe before flowing into the activated carbon is reduced or drifted. Because there is little vortex and the like, and the entire activated carbon can be applied to the removal of harmful substances in raw water, this value becomes the reference value of the activated carbon capacity of a predetermined capacity for the removal of harmful substances.
[0016]
When the granular activated carbon is used in a water purifier, a particle size of 30 to 150 mesh is usually adopted because of securing the surface area exposed to raw water and ease of filling the activated carbon pack. If it is smaller than this particle size, the surface area will increase, but it will be easier to scatter than the activated carbon pack during filling, and if it is larger than this particle size, the gaps between the activated carbon particles will increase, and the raw water will be activated without removing harmful substances in the raw water. Short paths that flow out of the pack are likely to occur. In addition, if rough packing is performed so that the activated carbon moves freely in the activated carbon pack, the short path occurs when raw water is introduced, and the desired characteristics cannot be secured. Table 1 below shows the maximum value of the accumulated water flow rate and unit time water flow rate in the measurement range when the compression margin of the sponge 6 is changed and the force for pressing the activated carbon 5 in the axial direction of the activated carbon pack 1 is changed. The results of comparison with 100% are shown.
[0017]
[Table 1]

[0018]
If the force which presses activated carbon from the result of Table 1 shall be 4-30 kPa, integrated water flow will become a value close | similar to the said maximum value. If the pressure is 4 kPa or less, the water permeability becomes large, but a short path is likely to occur, and the effect of the sponge 6 is lost. If the pressure is 30 kPa or more, not only is the attachment of the lid 8 to the case 3 difficult. It can be seen that the activated carbon pack itself is deformed / expanded, the sponge 6 becomes dense, and the amount of purified water flowing out of the activated carbon pack 1 is reduced.
[0019]
The case 3 of the activated carbon pack 1 has a raw water inflow hole 2 in the center, but the activated carbon pack 1 needs to be liquid-tightly connected to the water purifier body. An O-ring or the like is attached to the outer periphery of the raw water inlet hole 2 to be connected to the water purifier main body. The O-ring seal performance is better when the diameter of the O-ring is smaller, that is, the diameter of the raw water inflow hole 2 is smaller, the force required for connecting the activated carbon pack 1 can be reduced, and the size of the O-ring is smaller, resulting in lower costs Can also be lowered. For this reason, the shape of the case 3 is the case 3 in which the raw water inflow hole 2 forms a cylindrical shape from the center of the bottomed cylindrical portion, as shown in FIGS. 1 and 2, because of easy connection to the water purifier main body. The shape which protrudes outside from the bottom part is widely adopted.
[0020]
4 has an activated carbon 22 having a diameter of 80 mm and a length of 50 mm, and an activated carbon pack 21 having an h dimension of 30 mm is prepared in order to avoid drift and vortex of raw water at the front part of the activated carbon 22, As a result of measuring the free residual chlorine in the raw water and the accumulated water flow amount by the evaluation method, the diameter of the activated carbon 22 is larger than the diameter of the raw water inflow hole 23. The activated carbon 22 flows into the activated carbon 22 with the diameter almost maintained, passes through the activated carbon in a pipe shape, and flows out of the activated carbon pack 21 as it is, and the outer diameter side of the activated carbon 22 is effective for removing harmful substances in the raw water. It has been found that there is a non-acting part that does not contribute to. For this purpose, it is effective to provide a baffle plate 13 as shown in FIG. 1, changing the diameter of the baffle plate 13 to 100% as the diameter of the cross section perpendicular to the flow direction of the activated carbon, and Table 2 shows the results of carrying out the test with the inner diameter being the same as that of the baffle plate 13.
[0021]
[Table 2]

[0022]
From the results in Table 2, when the baffle plate 13 has a diameter of 16 to 30% with respect to the diameter of the activated carbon 5, a good integrated water flow value is obtained, and the raw water passes through the activated carbon layer with the diameter of the raw water inflow hole 2. It turns out that there is nothing. In order to manufacture the baffle plate 13 integrally with the case 3, the undercut of the mold can be eliminated at the connecting portion between the baffle plate 13 and the case 3, so that the diameter of the baffle plate 13 is inflow of raw water. The inner diameter of the hole 2 is preferably equal to or slightly smaller than the inner diameter. When the diameter of the baffle plate is 16% or less, the diameter of the raw water inflow hole 2 is reduced, the inflow speed is increased, and the flow disturbance at the front part of the activated carbon 5 is increased. Further, when the diameter of the baffle plate 13 is larger than 30%, the diameter of the raw water inflow hole 2 is increased in conjunction with it, and the sealing property of the connecting portion between the raw water inflow hole 2 and the water purifier main body is lowered as described above. However, there is a problem that the cost of the necessary seal member increases.
[0023]
Further, the baffle plate 13 has a raw water inflow hole as shown in FIG. 5 (the view of the bottom of the case 3 viewed from the A direction in FIG. 1) and FIG. 6 (the view of the bottom of the case 3 viewed from the B direction in FIG. 1). When the position of the activated carbon pack 1 is fixed in the axial direction by connecting to the rib 11C connected to the inside of the inner wall 2, the raw water that has flowed in can be distributed to the activated carbon layer while rectifying, and the baffle plate 13 is connected to the raw water inflow hole 2 It is less likely to be deformed by the speed of the raw water that has flowed in and the pressing force from the activated carbon 5, and when connecting to the water purifier main body, the shape and strength of the cylindrical portion of the raw water inflow hole 2 can be maintained and a sheet such as an O-ring can be maintained. This is preferable because it can securely hold the steel member and secure a good water stop.
[0024]
The raw water whose direction of flow has been changed by the baffle plate 13 flows into the activated carbon 5, but in order to reduce the disturbance of the raw water at the front part of the activated carbon 5, increasing the h dimension shown in FIG. The axial dimension becomes large, and not only the water purifier becomes large, but also the material necessary for the activated carbon pack 1 increases and the cost also increases. For this purpose, the raw water passage area per unit area of the portion flowing into the activated carbon 5 is changed in various ways, and the results of evaluating the characteristics as the activated carbon pack 1 by the evaluation method are shown in Table 3. Here, for example, according to FIG. 7, P indicates that raw water flows into the entire surface of the axial end of the activated carbon, and Q indicates that the raw water passage area per unit area increases toward the outer periphery. The situation is shown, and it is shown that integrating Q is the total raw water passage area of the example of the present invention, and the value obtained by integrating the Q part shown in FIGS. 8 and 9 for comparison is also the value obtained by integrating Q in FIG. The integrated water flow rate was evaluated when the distribution was changed in the same and therefore the same raw water passage area.
[0025]
[Table 3]

[0026]
From the results shown in Table 3, the configuration in which radial ribs are disposed at the bottom of the cylindrical case so that the fluid flow path is inclined from the baffle plate 13 toward the outer diameter increases the integrated water flow rate. That is, it can be seen that the entire activated carbon 5 can be effectively used to remove harmful substances in the raw water. In order to realize this, it is preferable to arrange the

ribs

11a, 11b, and 11c on the bottom surface of the case 3 as shown in FIGS. The rib 11a may also be used as the rib 11c connected to the inner diameter of the raw water inflow hole 2 in order to fix the baffle plate 13.
[0027]
Even when the purified water that has passed through the activated carbon 5 flows out of the activated carbon pack 1, as in the case 3, in order to reduce the drift of the flow of raw water and the non-active part in the activated carbon 5, It is preferable to provide a non-open hole portion corresponding to the baffle plate 13 of the soot 3 and further provide a plurality of holes on the outer periphery of the non-open hole portion. FIG. 3 is a view showing an embodiment of the present invention, in which the φ portion is a non-open hole portion and a plurality of opening holes 14 are arranged around the non-open hole portion. FIG. 10 shows an example in which a perforated plate having the same function and effect is installed at the bottom of the case 3, the perforated plate 15 has the same hole arrangement as that of the cover 8 shown in FIG. It is ultrasonically welded to the 5 side. In this case, the baffle plate 13 is not required if the center of the perforated plate 15 is a non-perforated portion, but the baffle plate 13 of the case 3 may be installed to hold the center of the perforated plate 15.
[0028]
In the activated carbon pack described above, an example in which a plurality of opening holes 14 are provided on the outflow side of the purified water as shown in FIG. 3 is shown. However, according to the structure of the water purifier, the raw water inlet and the purified water of the activated carbon pack are used. In some cases, both of the outlets may have the shape of the raw water inflow hole 2 shown in FIGS. 5 and 6, FIG. 11 is a diagram showing this embodiment, and FIG. It is a figure which shows the lid | cover 31 provided with the baffle plate 33 to be used. The nonwoven fabric 7 is ultrasonically welded to the lid 31 having the same function as the case 3 shown in FIGS. 1 and 2, and the case 3 and the lid 31 are ultrasonically welded by the flange portion 16 of the case 3. It is integrated as an activated carbon pack. Furthermore, in the embodiment shown in FIG. 11, coral sand particles 32 are introduced in the vicinity of the sponge 6, and ions such as calcium are added again to the raw water from which the umami components have been removed by the activated carbon 5, and the purified water is discharged from the top. When the raw water is introduced from the upper part and the purified water is discharged from the lower part due to the connection relationship with the water purifier in the configuration shown in FIG. 11, the coral sand 32 is put on the upper surface of the nonwoven fabric 4 at the bottom of the case 3.
[0029]
The embodiment described above can be applied to an activated carbon pack for a water purifier having an inlet hole of raw water having a diameter of 150 mm and a length of up to 200 mm from the state of the flow in the activated carbon pack. In consideration of the arrangement of the inflow holes and the outflow holes as well as the cylindrical shape as shown, the present invention can be applied even when the cross section is elliptical, polygonal, or an irregular shape matching the shape of the water purifier.
[0030]
Further, in the above-described embodiments, materials known for water purifiers can be used as the material of each part. As an example, activated carbon 5 is model number T-SB48 / 100 manufactured by Kuraray Chemical Co., Ltd. having a particle size of 48 to 100 mesh, and model number OR manufactured by Nippon Bayline Co., Ltd. is used for

nonwoven fabrics

4, 7, 14, and 20. -125 can be used as the coral sand 19, and RF-1 (10/24) having a particle size of 10 to 24 manufactured by Coral Biotech Co., Ltd. can be used.
[0031]
【The invention's effect】
As is clear from the above description, according to the present invention, the arrangement of activated carbon and other components in the case is arranged in the order of nonwoven fabric, activated carbon, sponge, nonwoven fabric from the upstream side. An activated carbon pack for water purifiers that can be utilized to the maximum can be obtained.
[Brief description of the drawings]
FIG. 1 is a view showing one configuration of parts of an activated carbon pack for a water purifier according to the present invention.
FIG. 2 is a diagram showing a state where the components shown in FIG. 1 are assembled.
FIG. 3 is a view of the lid shown in FIG. 2 as viewed from the C direction.
FIG. 4 is a diagram showing a configuration of an example of an activated carbon pack used in a raw water circulation test.
FIG. 5 is a view of the case shown in FIG. 1 as viewed from the A direction.
6 is a view of the case shown in FIG. 1 as viewed from the B direction. FIG.
FIG. 7 is a diagram showing an example of the relationship between the activated carbon diameter and the baffle plate diameter and the raw water passage area per unit area in the present invention example.
FIG. 8 is a diagram showing an example of the relationship between activated carbon diameter and baffle plate diameter and raw water passage area per unit area in a comparative example.
FIG. 9 is a diagram showing another example of the relationship between the activated carbon diameter and the baffle plate diameter and the raw water passage area per unit area in the comparative example.
FIG. 10 is a view showing the structure of another example of the activated carbon pack for water purifier of the present invention.
FIG. 11 is a view showing a configuration of still another example of the activated carbon pack for water purifier of the present invention.
12 is a diagram showing a configuration of a lid used in FIG.
[Explanation of symbols]
1 Activated carbon pack for water purifier, 2, 23 Raw water inflow hole, 3 Case, 3a opening, 4, 7 Non-woven fabric, 5, 22 Activated carbon, 6 Sponge, 8, 31 Lid, 10a, 10b Convex part, 11a, 11b, 11c Rib , 13, 33 Baffle plate, 14 Open holes, 15 Perforated plate, 16 Flange part, 21 Activated carbon pack, 32 Coral sand grains

Claims

A non-woven fabric, activated carbon, sponge, and non-woven fabric are set in this order from the bottom of the case to a case having a bottomed cylindrical shape and a raw water inflow hole in the center of the bottom, and the case opening has a plurality of openings. in closed and integrated, Quai cylindrical - scan the bottom center of the water inlet holes, which has 16 to 30% of the open area of the cross sectional area of a plane perpendicular to the direction of raw water with activated carbon layer passes, activity A disc baffle plate having an area of 16 to 30% of a cross-sectional area of a surface perpendicular to the direction in which raw water passes through a coal bed and having a diameter smaller than that of the raw water inflow hole at the center of the bottom of the cylindrical case. Radial ribs provided on the bottom of the cylindrical case other than the raw water inlet so that the fluid flow path is inclined toward the outer diameter from the baffle at the bottom of the cylindrical case. And a support for supporting the baffle plate provided in the raw water inflow hole. , Water purifier activated carbon pack, characterized in that it has disposed.

A lid that has a cylindrical shape with a bottom and a raw water inflow hole in the center of the bottom, in which the nonwoven fabric, activated carbon, sponge, and nonwoven fabric are set in order from the bottom of the case, and the opening has a hole around the case opening. in closed and integrated, Quai cylindrical - scan the bottom center of the water inlet holes, which has 16 to 30% of the open area of the cross sectional area of a plane perpendicular to the direction of raw water with activated carbon layer passes, activity A disc baffle plate having an area of 16 to 30% of a cross-sectional area of a surface perpendicular to the direction in which raw water passes through a coal bed and having a diameter smaller than that of the raw water inflow hole at the center of the bottom of the cylindrical case. Radial ribs provided on the bottom of the cylindrical case other than the raw water inlet so that the fluid flow path is inclined toward the outer diameter from the baffle at the bottom of the cylindrical case. And a support for supporting the baffle plate provided in the raw water inflow hole. , Water purifier activated carbon pack, characterized in that it has disposed.

16-30% of the cross-sectional area of the surface perpendicular to the direction in which the raw water passes through the activated carbon layer in the portion corresponding to the raw water inflow hole at the bottom of the bottomed cylindrical case in the lid having a plurality of opening holes The activated carbon pack for water purifiers of Claim 1 which provided the disk-shaped non-open hole part which has the area of, and provided the several opening hole in the outer periphery of the said non-open hole part.

The opening hole of the lid having an opening hole in the center has an opening area of 16 to 30% of the cross-sectional area of the surface perpendicular to the direction in which the raw water passes through the activated carbon layer, and radial ribs are provided on the inner surface portion of the lid. Further, a circular baffle plate having an area of 16 to 30% of a cross-sectional area of a surface perpendicular to the direction in which raw water passes through the activated carbon layer and having a diameter smaller than the opening hole of the lid is used as the radial rib. The activated carbon pack for water purifiers of Claim 2 connected.

Either a lid having a plurality of opening holes for closing the opening of the case or a lid having an opening hole in the center, and a case having a bottomed cylindrical shape and a raw water inflow hole in the center of the bottom, the outer periphery of the nonwoven fabric The activated carbon pack for water purifiers according to claim 1 or 2, wherein a circumferential convex portion is provided at a portion where the portion abuts, and a nonwoven fabric is ultrasonically welded at the convex portion.

The activated carbon pack for water purifiers according to claim 1 or 2, wherein the activated carbon layer is pressed in the axial direction by a sponge at 4 to 30 kPa.

Cylindrical Ke - scan the bottom center of the water inlet holes, and in the opening hole in the lid having an opening hole in the center, one of claims 1 to 6, in which a rib which is connected to the baffle plate and the raw water inlet hole inner wall The activated carbon pack for water purifiers of Claim 1.