JPH10277537A - Water purifier - Google Patents

Water purifier

Info

Publication number
JPH10277537A
JPH10277537A JP8699097A JP8699097A JPH10277537A JP H10277537 A JPH10277537 A JP H10277537A JP 8699097 A JP8699097 A JP 8699097A JP 8699097 A JP8699097 A JP 8699097A JP H10277537 A JPH10277537 A JP H10277537A
Authority
JP
Japan
Prior art keywords
water
ion exchanger
activated carbon
aluminosilicate
filtration part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8699097A
Other languages
Japanese (ja)
Other versions
JP3150917B2 (en
Inventor
Yuka Samura
由華 左村
Masanao Kobuke
正直 小泓
Yuri Honda
ゆり 本田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP8699097A priority Critical patent/JP3150917B2/en
Publication of JPH10277537A publication Critical patent/JPH10277537A/en
Application granted granted Critical
Publication of JP3150917B2 publication Critical patent/JP3150917B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Separation Using Semi-Permeable Membranes (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

PROBLEM TO BE SOLVED: To remove heavy metals and supply safe and tasty water by providing the purifier with a filtration part filled with an aluminosilicate-based inorganic ion exchanger, a weakly acidic ion exchanger, and activated carbon. SOLUTION: Raw water (tap water) is pneumatically supplied to a first filtration part 2 through an inlet 6 from the outside of an outside container 1. In this case, the first filtration part 2 is constituted by filling space between a frame made of plastic and a first nylon net 5 and between the frame and a second nylon net 3 with an aluminosilicate-based inorganic ion exchanger, a weakly acidic ion exchanger, and an adsorbent layer 4 of activated carbon. Consequently, heavy metals in raw water are removed by adsorption by bringing the raw water into contact with the adsorbent layer 4 when the raw water flows through the first filtration part 2. Next, the resultant water passes a water distributing pipe 12 and led to a second filtration part 7 provided with a porous hollow fiber membrane 8 made of a plurality of hollow fibers and at the time when the raw water passed through the second filtration part 7, microbe and other finely small suspended solids are filtered and then the resultant water is discharged as filtered water through a discharging outlet 11.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は安全でおいしい水を
得るための浄水器、さらには吸着材と特定することによ
り、水道水中に微量に含まれる重金属イオンを除去する
ことができる浄水器に関する。
The present invention relates to a water purifier for obtaining safe and tasty water, and more particularly to a water purifier capable of removing a trace amount of heavy metal ions contained in tap water by specifying an adsorbent.

【0002】[0002]

【従来の技術】水道水中に含まれる残留塩素を除去する
ことを目的とした活性炭浄水器が数年前に発売され、使
用されていたが、この種の浄水器は長時間使用しなかっ
た場合に活性炭中に雑菌が発生し、好ましくないことが
明らかにされた。そこで、活性炭中に発生した雑菌の流
出を抑えるために、多孔質中空糸膜などの膜濾過を利用
した浄水器や、活性炭に銀を添着するなどの方法により
抗菌性をもたせた浄水器が開発され、現在主流となって
いる。
2. Description of the Related Art Activated carbon water purifiers aimed at removing residual chlorine contained in tap water were launched and used several years ago, but this type of water purifier has not been used for a long time. It was revealed that various bacteria occurred in the activated carbon, which was undesirable. Therefore, in order to suppress the outflow of various bacteria generated in activated carbon, a water purifier using membrane filtration such as a porous hollow fiber membrane, and a water purifier with antibacterial properties by attaching silver to activated carbon have been developed. It is now mainstream.

【0003】これらの浄水器は、活性炭の使用量と種類
を適正に選択することにより、水道水に微量に溶解して
いるトリハロメタン、農薬などの有害な有機物を除去す
ることも可能である。
[0003] These water purifiers can also remove harmful organic substances such as trihalomethane and pesticides dissolved in tap water in trace amounts by appropriately selecting the amount and type of activated carbon used.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、このよ
うな膜濾過と活性炭吸着を組み合わせた高機能浄水器で
あっても、水道水中に微量溶解しているとして現在問題
視されている鉛などの重金属類を完全に除去することが
できないのが現状である。これらの重金属類を除去する
ために、逆浸透膜を用いた浄水器も開発されており、極
めて高い除去性能を示すが、飲用水として必要とされる
ミネラル成分までも除去していまい、飲料水のおいしさ
という点からはマイナスの効果を示すという問題があ
る。
However, even with such a high-performance water purifier combining membrane filtration and activated carbon adsorption, heavy metals such as lead, which are currently regarded as a problem because they are slightly dissolved in tap water, are considered. At present, it is not possible to completely remove such species. In order to remove these heavy metals, a water purifier using a reverse osmosis membrane has also been developed, and shows extremely high removal performance, but it does not remove mineral components required for drinking water, and drinking water There is a problem in that it has a negative effect on taste.

【0005】また、多種多様な不純物を有する水源に適
用されている浄水器として、耐圧容器にフィルター、活
性炭、強酸性イオン交換樹脂を収納した浄水器(特開昭
61−257282号公報)や、活性炭収納ユニット、
分離濾過膜収納ユニット、さらに強酸性イオン交換樹脂
収納ユニットが組み合わされたカセット式浄水器(実開
平3−7989号公報)が提案されている。また、天然
石、セラミックなどを濾材として使用した浄水器も実用
化されている。
[0005] Further, as a water purifier applied to a water source having various kinds of impurities, a water purifier in which a filter, activated carbon, and a strongly acidic ion exchange resin are stored in a pressure-resistant container (JP-A-61-257282), Activated carbon storage unit,
There has been proposed a cassette type water purifier (Japanese Utility Model Laid-Open No. 3-7989) in which a separation filtration membrane storage unit and a strongly acidic ion exchange resin storage unit are combined. In addition, water purifiers using natural stones, ceramics, and the like as filter media have been put to practical use.

【0006】しかし、強酸性イオン交換樹脂は鉛などの
重金属類の除去性能を高めようとすると容積を増量しな
ければならず、浄水器が大きくなり、またコストも上昇
する。更に、強酸性イオン交換樹脂は製造過程の副反応
生成物や不純物を含有していたり、また使用中に徐々に
分解が進んだりするため、多量に用いた場合には、これ
ら有機化合物が濾過水中に溶出する恐れがある。
However, in order to enhance the performance of removing heavy metals such as lead, the volume of the strongly acidic ion exchange resin must be increased, which increases the size of the water purifier and the cost. Furthermore, strong acid ion exchange resins contain by-products and impurities during the manufacturing process, and gradually decompose during use. May be eluted.

【0007】その後、水道水中に微量溶解している鉛な
どの重金属類を除去するためにアルミノケイ酸塩系無機
イオン交換体を活性炭と混合して使用する浄水器(特開
平07−258331号)が提案されている。
[0007] Thereafter, a water purifier (Japanese Patent Application Laid-Open No. 07-258331) using an aluminosilicate inorganic ion exchanger mixed with activated carbon to remove heavy metals such as lead dissolved in a trace amount of tap water is known. Proposed.

【0008】しかし、アルミノケイ酸塩系無機イオン交
換体は重金属類の除去効果は高いものの、アルミノケイ
酸塩系無機イオン交換体自体のpHが10前後と高いた
めに、浄水器を通過した濾過水のpHは原水より高くな
り、原水(水道水)のpHの高い地域ではpHの水道水
の基準値5.8〜8.6から外れるおそれがあるという
問題があった。
[0008] However, although the aluminosilicate-based inorganic ion exchanger has a high effect of removing heavy metals, the pH of the aluminosilicate-based inorganic ion exchanger itself is as high as about 10, so that the filtered water passed through the water purifier is high. There is a problem that the pH becomes higher than the raw water, and in a region where the raw water (tap water) has a high pH, the pH may deviate from the standard value of the tap water of 5.8 to 8.6.

【0009】したがって本発明の課題は、重金属類を除
去することができ、安全でおいしい水を供給することが
できる浄水器を提供することにある。
Accordingly, an object of the present invention is to provide a water purifier capable of removing heavy metals and supplying safe and delicious water.

【0010】[0010]

【課題を解決するための手段】前記課題を解決するため
に、本発明においては以下のような浄水器を提案する。
第1の発明は、アルミノケイ酸塩系無機イオン交換体、
弱酸性イオン交換樹脂、活性炭を充填した濾過部を有す
ることを特徴とする浄水器である。第2の発明は、アル
ミノケイ酸塩系無機イオン交換体、弱酸性イオン交換樹
脂、活性炭を混合して充填したことを特徴とする第1の
発明に記載の浄水器である。第3の発明は、アルミノケ
イ酸塩系無機イオン交換体が下記のようなモル比組成を
有することを特徴とする第1の発明または第2の発明に
記載の浄水器である。 Na2O/K2O/CaO/Al23/SiO2=0.4
〜1/0〜0.4/0〜0.5/1/1.5〜3 第4の発明は、多孔質中空糸膜を備えた他の濾過部を設
けたことを特徴とする第1〜3いずれか一発明に記載の
浄水器である。本発明においては、アルミノケイ酸塩系
無機イオン交換体を用いて重金属類を除去するととも
に、弱酸性イオン交換樹脂によってpHを調製し、水道
水基準のpHをクリアーした安全な水を供給することが
できる。
In order to solve the above problems, the present invention proposes the following water purifier.
A first invention is an aluminosilicate-based inorganic ion exchanger,
It is a water purifier characterized by having a filtration unit filled with a weakly acidic ion exchange resin and activated carbon. A second invention is the water purifier according to the first invention, wherein an aluminosilicate inorganic ion exchanger, a weakly acidic ion exchange resin, and activated carbon are mixed and filled. A third invention is the water purifier according to the first invention or the second invention, wherein the aluminosilicate-based inorganic ion exchanger has the following molar ratio composition. Na 2 O / K 2 O / CaO / Al 2 O 3 / SiO 2 = 0.4
-1/0 to 0.4 / 0 to 0.5 / 1 / 1.5 to 3 The fourth invention is characterized in that another filtration unit provided with a porous hollow fiber membrane is provided. 3 is a water purifier according to any one of the inventions. In the present invention, while removing heavy metals using an aluminosilicate inorganic ion exchanger, the pH is adjusted with a weakly acidic ion exchange resin, and safe water that has cleared the tap water standard pH can be supplied. it can.

【0011】[0011]

【発明の実施の形態】図1は本発明の浄水器の一例を示
す一部断面図である。以下、その作用とともに説明す
る。図中符号1は、浄水器の外容器である。原水(水道
水)は、外容器1内部に設けられた第1の濾過部2に、
前記外容器1外部から入り口6を経て圧入される。前記
第1の濾過部2は、プラスチックからなる枠とナイロン
製などの網とからなる第1の網5と第2の網3との間
に、アルミノケイ酸塩系無機イオン交換体、弱酸性イオ
ン交換樹脂、活性炭などが充填された吸着剤層4が設け
られて構成されている。この濾過部2を通ることによっ
て、原水は吸着剤層4に接触して重金属類などが吸着除
去され、配水管12を経て複数本の中空糸から構成され
た多孔質中空糸膜8を備えた第2の濾過部7に導かれ、
この第2の濾過部7中を通って、雑菌その他の微小浮遊
物が濾過され、最後に濾過水として吐出口11から外容
器1外部に供給される。なお前記配水管12の途中に
は、流量表示部および制御部10を備えた流量センサー
9が設けられており、水の流量が測定され、表示される
とともに制御されるようになっている。
FIG. 1 is a partial sectional view showing an example of a water purifier according to the present invention. Hereinafter, the operation will be described together with the operation. Reference numeral 1 in the figure denotes an outer container of the water purifier. Raw water (tap water) is supplied to a first filtration unit 2 provided inside the outer container 1,
It is press-fitted from the outside of the outer container 1 through the entrance 6. The first filtration unit 2 is provided between a first net 5 and a second net 3 made of a plastic frame and a net made of nylon or the like. An adsorbent layer 4 filled with an exchange resin, activated carbon, or the like is provided. By passing through the filtration unit 2, the raw water comes into contact with the adsorbent layer 4 to adsorb and remove heavy metals and the like. Guided to the second filtration unit 7,
Bacteria and other micro-suspended substances are filtered through the second filtration unit 7 and finally supplied to the outside of the outer container 1 from the discharge port 11 as filtered water. A flow sensor 9 provided with a flow rate display unit and a control unit 10 is provided in the middle of the water distribution pipe 12 so that the flow rate of water is measured, displayed, and controlled.

【0012】吸着剤層4において、イオン交換樹脂とし
ては弱酸性イオン交換樹脂を使用するのが望ましい。弱
酸性イオン交換樹脂以外のイオン交換樹脂を使用した場
合、濾過水のpHを水道水基準である5.8〜8.6の
範囲で安定させることが難しいことがある。すなわち、
通常pH10程度のアルミノケイ酸塩系無機イオン交換
体に水が接触すると、水のpHが上昇する。弱酸性イオ
ン交換樹脂は後述するように弱酸性なので、水がアルミ
ノケイ酸塩系無機イオン交換体に接触すると同時に弱酸
性イオン交換樹脂に接触すると、水のpHが中性付近に
調製されることになる。
In the adsorbent layer 4, it is desirable to use a weakly acidic ion exchange resin as the ion exchange resin. When an ion exchange resin other than the weakly acidic ion exchange resin is used, it may be difficult to stabilize the pH of the filtered water within the range of 5.8 to 8.6 which is the standard of tap water. That is,
When water comes into contact with an aluminosilicate inorganic ion exchanger having a pH of about 10, the pH of the water increases. Since the weakly acidic ion exchange resin is weakly acidic as described later, when water contacts the aluminosilicate inorganic ion exchanger and simultaneously contacts the weakly acidic ion exchange resin, the pH of the water is adjusted to around neutral. Become.

【0013】弱酸性イオン交換樹脂は、交換基としてカ
ルボン酸(−COOH)をもち、弱酸性を示す。また、
+イオンに対する選択性が大きく、H形に再生されや
すい特徴をもつ。弱酸性イオン交換樹脂としては、主に
アクリル酸系のものとメタクリル酸系のものがあるが、
アクリル酸系のものが好ましい。アクリル酸系弱酸性イ
オン交換樹脂はメタクリル酸系のものよりも酸性度が高
く、重炭酸濃度の高い水処理に使用されている。一方メ
タクリル酸系弱酸性イオン交換樹脂は幾分酸性度が低
く、水処理以外の特殊用途に主に用いられている。した
がって本発明においては、酸性度が高く水処理用途に用
いられるアクリル酸系弱酸性イオン交換樹脂を使用する
のが望ましい。
The weakly acidic ion exchange resin has a carboxylic acid (—COOH) as an exchange group and exhibits a weakly acidic property. Also,
It has high selectivity for H + ions and is easily regenerated into H-form. As weakly acidic ion exchange resins, there are mainly acrylic acid-based resins and methacrylic acid-based resins,
Acrylic acids are preferred. Acrylic acid-based weakly acidic ion exchange resins have higher acidity than methacrylic acid-based resins and are used for water treatment with high bicarbonate concentration. On the other hand, methacrylic acid-based weakly acidic ion exchange resins have somewhat low acidity and are mainly used for special purposes other than water treatment. Therefore, in the present invention, it is desirable to use an acrylic acid-based weakly acidic ion exchange resin having a high acidity and used for water treatment.

【0014】アルミノケイ酸塩系無機イオン交換体は、
主に重金属類の除去を目的として浄水器内に充填される
もので、具体的にはゼオライトなどをあげることができ
る。アルミノケイ酸塩系無機イオン交換体は、重金属
類、特に鉛の除去性能の飽和吸着量から、そのモル組成
比がNa2O/K2O/CaO/Al23/SiO2
0.4〜1/0〜0.4/0〜0.5/1/1.5〜3
で表される酸性酸化物複合体であることが特に望まし
い。このモル組成比は、Al23を1としたときの組成
比であり、組成比がこの範囲からはずれた場合には、鉛
などの重金属類の吸着量が低下することがある。このよ
うに好ましい組成比を有するアルミノケイ酸塩系無機イ
オン交換体としては、具体的には合成ゼオライトである
モレキュラーシーブ3A,モレキュラーシーブ4A,モ
レキュラーシーブ5A,モレキュラーシーブ13X(ユ
ニオン昭和(株)製)などがあげられる。
The aluminosilicate inorganic ion exchanger is
It is filled into a water purifier mainly for the purpose of removing heavy metals, and specific examples include zeolite. The aluminosilicate-based inorganic ion exchanger has a molar composition ratio of Na 2 O / K 2 O / CaO / Al 2 O 3 / SiO 2 = from the saturated adsorption amount for the performance of removing heavy metals, particularly lead.
0.4 ~ 1/0 ~ 0.4 / 0 ~ 0.5 / 1 / 1.5 ~ 3
It is particularly desirable to be an acidic oxide complex represented by This molar composition ratio is a composition ratio when Al 2 O 3 is set to 1, and when the composition ratio is out of this range, the adsorption amount of heavy metals such as lead may decrease. Specific examples of the aluminosilicate-based inorganic ion exchanger having such a preferable composition ratio include molecular sieves 3A, molecular sieves 4A, molecular sieves 5A, and molecular sieves 13X (manufactured by Union Showa) which are synthetic zeolites. And so on.

【0015】アルミノケイ酸塩系無機イオン交換体の粒
子は、小さいほど吸着性能は高いが、小さすぎると浄水
器の圧力損失の増大を招くことがある。そのため粒子の
平均粒径は、好ましくは0.1〜0.5mmとする。
The smaller the particles of the aluminosilicate-based inorganic ion exchanger, the higher the adsorption performance. However, if the particles are too small, the pressure loss of the water purifier may increase. Therefore, the average particle size of the particles is preferably 0.1 to 0.5 mm.

【0016】活性炭は、重金属類の除去に加えて水道水
中に残存して、いわゆるカルキ臭の原因とされている含
塩素酸化性物質や、有害物質であるトリハロメタンを除
去する目的で用いられる。この目的を達成するものであ
れば特に限定することはない。例えば活性炭は、一般に
粉末状、繊維状、粒子状などの形状のものが用いられ
る。また、その原料から分類すると、ヤシ殻活性炭、骨
炭、木炭などの天然系活性炭、あるいはピッチ系、石油
コークス系、樹脂やゴムなどの焼成賦活活性炭などの合
成活性炭などを例示することができる。さらに賦活方法
から分類すると、水蒸気賦活、化学賦活などによって賦
活された活性炭などを例示することができる。
Activated carbon is used for the purpose of removing chlorine-containing oxidizing substances and trihalomethane, which is a harmful substance, remaining in tap water in addition to removing heavy metals, which causes so-called odor. There is no particular limitation as long as this object is achieved. For example, activated carbon is generally used in the form of powder, fiber, particles and the like. When classified from the raw materials, natural activated carbon such as coconut shell activated carbon, bone charcoal, and charcoal, and synthetic activated carbon such as pitch activated petroleum coke, and fire activated activated carbon such as resin and rubber can be exemplified. Further, when classified according to the activation method, activated carbon activated by steam activation, chemical activation or the like can be exemplified.

【0017】本発明の浄水器においてはこれらいずれの
活性炭を用いてもよいが、活性炭の粒子が小さすぎる場
合には、第1の濾過部2に水を通水させるときに圧力損
失が大きくなる。したがって、圧力損失の小さなもの、
すなわち比較的大きな、平均粒径0.1〜1.0mm程
度の粒子状のものが実用的には適当である。また、活性
炭によって除去される原水中の物質は比較的分子量の小
さいものが多いので、経済性も含めて考慮すると、水蒸
気賦活ヤシ殻活性炭が実用的に最も好適である。また、
銀などを添着して抗菌性を付与した活性炭を用いてもよ
い。
In the water purifier of the present invention, any of these activated carbons may be used. However, if the activated carbon particles are too small, the pressure loss increases when water is passed through the first filtration unit 2. . Therefore, those with small pressure loss,
That is, a relatively large particle having an average particle diameter of about 0.1 to 1.0 mm is practically appropriate. Further, since many substances in raw water removed by activated carbon have relatively small molecular weights, steam-activated coconut shell activated carbon is practically most suitable in consideration of economy. Also,
Activated carbon to which antibacterial properties are imparted by impregnating silver or the like may be used.

【0018】吸着剤層4においては、例えば、アルミノ
ケイ酸塩系無機イオン交換体、弱酸性イオン交換樹脂、
活性炭が、それぞれ混ざらない状態で充填されていても
よいが、これらが混合されて充填されていると最も好ま
しい。これは、原水が偏りなくこれらアルミノケイ酸塩
系無機イオン交換体、弱酸性イオン交換樹脂、活性炭に
接触し、それぞれの効果がバランスよく発揮されやすく
なるからである。
In the adsorbent layer 4, for example, an aluminosilicate inorganic ion exchanger, a weakly acidic ion exchange resin,
The activated carbon may be filled in a state where they are not mixed, but it is most preferable that these are mixed and filled. This is because the raw water comes into contact with these aluminosilicate-based inorganic ion exchangers, the weakly acidic ion-exchange resin, and the activated carbon without bias, and the respective effects are easily exerted in a well-balanced manner.

【0019】アルミノケイ酸塩系無機イオン交換体、弱
酸性イオン交換樹脂、活性炭の配合量は、水道水(原
水)の組成や性状、すなわち重金属類などの吸着除去す
るべき物質の含量や、pHなどによって調整する必要が
ある。特にアルミノケイ酸塩系無機イオン交換体と弱酸
性イオン交換樹脂のバランスによって濾過水のpHが変
化するので、濾過水のpHが水道水のpH基準をクリア
ーするように充填量を決定する。例えば、通常はアルミ
ノケイ酸塩系無機イオン交換体と弱酸性イオン交換樹脂
の体積比率は1:5〜5:1程度とされる。また、活性
炭はアルミノケイ酸塩系無機イオン交換体に対して20
倍程度用いられる。
The amounts of the aluminosilicate inorganic ion exchanger, the weakly acidic ion exchange resin, and the activated carbon are determined according to the composition and properties of tap water (raw water), that is, the content of substances to be adsorbed and removed such as heavy metals, pH, and the like. Need to be adjusted by In particular, since the pH of the filtered water changes depending on the balance between the aluminosilicate-based inorganic ion exchanger and the weakly acidic ion exchange resin, the filling amount is determined so that the pH of the filtered water clears the pH standard of tap water. For example, the volume ratio of the aluminosilicate inorganic ion exchanger to the weakly acidic ion exchange resin is usually about 1: 5 to 5: 1. Activated carbon is used for an aluminosilicate inorganic ion exchanger.
It is used about twice.

【0020】本発明の浄水器において第2の濾過部7は
必須ではないが、水中に含まれる雑菌をはじめとする微
小浮遊物を濾過除去するためには第2の濾過部7を設け
た方が好ましい。また、第2の濾過部7の位置は特に限
定しないが、通常は図1に示したように第1の濾過部2
の下流側に設けた方が、吸着剤層4に充填された活性炭
に起因する微小浮遊物を除去することができるため、好
ましい。このように微小浮遊物を濾過除去するために
は、第2の濾過部7の単位体積当たりの有効濾過面積は
大きいほど好ましい。このため、上述のように多孔質中
空糸膜8を採用すると、平膜などを用いるよりも効率が
よく望ましい。
In the water purifier of the present invention, the second filtration unit 7 is not indispensable. However, in order to filter and remove minute suspended matters including various bacteria contained in the water, the second filtration unit 7 is preferably provided. Is preferred. The position of the second filtration unit 7 is not particularly limited, but is usually the first filtration unit 2 as shown in FIG.
It is preferable to provide it on the downstream side because it is possible to remove fine suspended matter caused by the activated carbon filled in the adsorbent layer 4. In order to filter and remove minute suspended matters as described above, it is preferable that the effective filtration area per unit volume of the second filtration unit 7 is large. For this reason, the use of the porous hollow fiber membrane 8 as described above is more efficient and desirable than using a flat membrane or the like.

【0021】多孔質中空糸膜の材料としては、例えばポ
リエチレン、ポリプロピレンなどのオレフィン系ポリマ
ーやポリスルホンなどが用いられるがこれらに限定する
ことはない。また、多孔質中空糸膜は、例えば通水性能
向上のために、エチレン−酢酸ビニル共重合体(ビニル
アルコール)などで親水化されていると特に望ましい。
As the material of the porous hollow fiber membrane, for example, olefin polymers such as polyethylene and polypropylene, and polysulfone are used, but the material is not limited to these. Further, it is particularly desirable that the porous hollow fiber membrane is made hydrophilic with an ethylene-vinyl acetate copolymer (vinyl alcohol) or the like, for example, in order to improve water permeability.

【0022】上述の浄水器は、第1の濾過部2におい
て、アルミノケイ酸塩系無機イオン交換体によって重金
属類が除去され、弱酸性イオン交換樹脂によってpHが
調製され、さらに活性炭によってトリハロメタンなどを
除去することができる。したがって、従来問題となって
いた重金属類を除去すると同時にpHを調製することが
できるので、水道水基準pHをクリアーした安全な水を
供給することができる。さらに多孔質中空糸膜8を備え
た第2の濾過部7を設けることによって微小浮遊物質を
除去することができる。
In the above-mentioned water purifier, heavy metals are removed by the aluminosilicate-based inorganic ion exchanger, pH is adjusted by the weakly acidic ion exchange resin, and trihalomethane and the like are further removed by activated carbon in the first filtration section 2. can do. Therefore, since the pH can be adjusted at the same time as removing heavy metals, which has conventionally been a problem, it is possible to supply safe water that has cleared the tap water standard pH. Further, by providing the second filtration unit 7 provided with the porous hollow fiber membrane 8, it is possible to remove minute suspended substances.

【0023】[0023]

【実施例】以下、本発明を実施例を示して詳しく説明す
る。 (実施例)図1に示した構造の浄水器において、プラス
チックからなる枠とナイロン網とからなる第1の網5と
第2の網3の間に、活性炭450gと、アルミノケイ酸
塩系無機イオン交換体100mlと、弱酸性イオン交換
樹脂30mlを混合して充填し、吸着剤層4とした。前
記弱酸性イオン交換樹脂としてはCNP80(バイエル
社製)を用いた。アルミノケイ酸塩系無機イオン交換体
としては、下記の組成で示されるモレキュラーシーブ5
Aを用いた。 Na2O/CaO/Al23/SiO2=0.5/0.5
/1.0/1.85
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. (Embodiment) In the water purifier having the structure shown in FIG. 1, 450 g of activated carbon and aluminosilicate-based inorganic ion were placed between a first net 5 and a second net 3 made of a plastic frame and a nylon net. The adsorbent layer 4 was formed by mixing and filling 100 ml of the exchanger and 30 ml of the weakly acidic ion exchange resin. CNP80 (manufactured by Bayer) was used as the weakly acidic ion exchange resin. As the aluminosilicate inorganic ion exchanger, molecular sieve 5 having the following composition is used.
A was used. Na 2 O / CaO / Al 2 O 3 / SiO 2 = 0.5 / 0.5
/1.0/1.85

【0024】また、エチレン−酢酸ビニル共重合体(ビ
ニルアルコール)によって親水化されたポリエチレン製
の中空糸を、複数本、2液型ポリウレタン樹脂で固定し
て集合体とし、この集合体の一端を切断して開放して多
孔質中空糸膜部8とし、第2の濾過部7を構成した。流
量センサー9としては羽根車式流量センサーを用いた。
A plurality of hollow fibers made of polyethylene hydrophilized with an ethylene-vinyl acetate copolymer (vinyl alcohol) are fixed with a two-pack polyurethane resin to form an aggregate, and one end of the aggregate is formed. It was cut and opened to form a porous hollow fiber membrane section 8 to constitute a second filtration section 7. As the flow sensor 9, an impeller flow sensor was used.

【0025】名古屋市の水道水に塩化鉛を溶かして、鉛
濃度150ppbに調整した水(原水:pH7.5)を
通水速度3.5リットル/ 分で毎回10リットルずつ
2時間おきに入り口6から供給した。試験の初期の濾過
水のpHは原水よりも低く、pH6.9であった。通水
するごとに濾過水のpHは上昇したが最高pHは8.3
であった。また、濾過水中の鉛濃度は5ppb以下であ
った。
[0025] Lead chloride is dissolved in tap water in Nagoya City, and water (raw water: pH 7.5) adjusted to a lead concentration of 150 ppb is passed at a flow rate of 3.5 L / min. Supplied from The pH of the filtered water at the beginning of the test was lower than the raw water, which was pH 6.9. The pH of the filtered water increased with each passage, but the maximum pH was 8.3.
Met. The lead concentration in the filtered water was 5 ppb or less.

【0026】(比較例)吸着剤層4において弱酸性イオ
ン交換樹脂を充填しない他は、実施例と同様にして浄水
器を構成し、試験を行った。試験の初期の濾過水のpH
は原水よりも高く、pH8.9であった。通水するごと
に濾過水のpHは上昇し、pHは最高10.2となっ
た。また、濾過水中の鉛濃度は5ppb以下であった。
これらの結果より、本発明に係る実施例の浄水器におい
ては、アルミノケイ酸塩系無機イオン交換体を用いて重
金属類を除去し、かつ水道水としてのpH基準をクリア
ーすることができることが確認できた。
(Comparative Example) A water purifier was constructed and tested in the same manner as in Example except that the weakly acidic ion exchange resin was not filled in the adsorbent layer 4. PH of the filtrate at the beginning of the test
Was higher than the raw water and had a pH of 8.9. Each time water was passed, the pH of the filtered water increased, and the pH reached a maximum of 10.2. The lead concentration in the filtered water was 5 ppb or less.
From these results, in the water purifier of the embodiment according to the present invention, it can be confirmed that heavy metals can be removed using an aluminosilicate inorganic ion exchanger, and that the pH standard as tap water can be cleared. Was.

【0027】[0027]

【発明の効果】以上説明したように本発明のの浄水器に
おいては、必須とする濾過部を、アルミノケイ酸塩系無
機イオン交換体、弱酸性イオン交換樹脂、活性炭を充填
して構成したので、この濾過部を通過する原水は、アル
ミノケイ酸塩系無機イオン交換体によって重金属類が除
去され、弱酸性イオン交換樹脂によってpHが調製さ
れ、さらに活性炭によってトリハロメタンなどが除去さ
れる。したがって、従来問題となっていた重金属類を除
去すると同時にpHを調製することができるので、水道
水基準pHをクリアーした安全な水を供給することがで
きる。さらに多孔質中空糸膜を備えた他の濾過部を設け
ることによって微小浮遊物質を同時に除去することがで
きる。
As described above, in the water purifier of the present invention, the essential filtration section is formed by filling an aluminosilicate inorganic ion exchanger, a weakly acidic ion exchange resin and activated carbon. In the raw water passing through the filtration unit, heavy metals are removed by an aluminosilicate inorganic ion exchanger, pH is adjusted by a weakly acidic ion exchange resin, and trihalomethane and the like are removed by activated carbon. Therefore, since the pH can be adjusted at the same time as removing heavy metals, which has conventionally been a problem, it is possible to supply safe water that has cleared the tap water standard pH. Further, by providing another filtration section provided with a porous hollow fiber membrane, minute suspended substances can be removed at the same time.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の浄水器の構造の一例を示した一部断
面図である。
FIG. 1 is a partial sectional view showing an example of the structure of a water purifier of the present invention.

【符号の説明】[Explanation of symbols]

2…第1の濾過部、4…吸着剤層、7…第2の濾過部、
8…多孔質中空糸膜
2 ... first filtration unit, 4 ... adsorbent layer, 7 ... second filtration unit,
8. Porous hollow fiber membrane

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI C02F 1/42 C02F 1/42 A 1/44 1/44 B ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification symbol FI C02F 1/42 C02F 1/42 A 1/44 1/44 B

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 アルミノケイ酸塩系無機イオン交換体、
弱酸性イオン交換樹脂、活性炭を充填した濾過部を有す
ることを特徴とする浄水器。
An aluminosilicate-based inorganic ion exchanger,
A water purifier comprising a filtration unit filled with a weakly acidic ion exchange resin and activated carbon.
【請求項2】 アルミノケイ酸塩系無機イオン交換体、
弱酸性イオン交換樹脂、活性炭を混合して充填したこと
を特徴とする請求項1記載の浄水器。
2. An aluminosilicate inorganic ion exchanger,
The water purifier according to claim 1, wherein a weakly acidic ion exchange resin and activated carbon are mixed and filled.
【請求項3】 アルミノケイ酸塩系無機イオン交換体が
下記のようなモル比組成を有することを特徴とする請求
項1または2記載の浄水器。 Na2O/K2O/CaO/Al23/SiO2=0.4
〜1/0〜0.4/0〜0.5/1/1.5〜3
3. The water purifier according to claim 1, wherein the aluminosilicate inorganic ion exchanger has the following molar ratio composition. Na 2 O / K 2 O / CaO / Al 2 O 3 / SiO 2 = 0.4
~ 1/0 ~ 0.4 / 0 ~ 0.5 / 1 / 1.5 ~ 3
【請求項4】 多孔質中空糸膜を備えた他の濾過部を設
けたことを特徴とする請求項1〜3いずれか一項に記載
の浄水器。
4. The water purifier according to claim 1, further comprising another filtration unit provided with a porous hollow fiber membrane.
JP8699097A 1997-04-04 1997-04-04 Water purifier Expired - Fee Related JP3150917B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8699097A JP3150917B2 (en) 1997-04-04 1997-04-04 Water purifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8699097A JP3150917B2 (en) 1997-04-04 1997-04-04 Water purifier

Publications (2)

Publication Number Publication Date
JPH10277537A true JPH10277537A (en) 1998-10-20
JP3150917B2 JP3150917B2 (en) 2001-03-26

Family

ID=13902316

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8699097A Expired - Fee Related JP3150917B2 (en) 1997-04-04 1997-04-04 Water purifier

Country Status (1)

Country Link
JP (1) JP3150917B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909660A1 (en) * 2006-12-07 2008-06-13 Agly Sarl Lab De L METHOD, DEVICE AND DEMINERALIZING BED FOR THE TREATMENT OF WATER BEFORE MIXING IT WITH A PHYTOSANITARY TREATMENT PRODUCT
CN102580690A (en) * 2012-03-06 2012-07-18 杭州师范大学 Nano-aperture granular adsorbent and preparation and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909660A1 (en) * 2006-12-07 2008-06-13 Agly Sarl Lab De L METHOD, DEVICE AND DEMINERALIZING BED FOR THE TREATMENT OF WATER BEFORE MIXING IT WITH A PHYTOSANITARY TREATMENT PRODUCT
CN102580690A (en) * 2012-03-06 2012-07-18 杭州师范大学 Nano-aperture granular adsorbent and preparation and application thereof

Also Published As

Publication number Publication date
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