JP3537519B2 - Filter media for water treatment - Google Patents
Filter media for water treatmentInfo
- Publication number
- JP3537519B2 JP3537519B2 JP30753594A JP30753594A JP3537519B2 JP 3537519 B2 JP3537519 B2 JP 3537519B2 JP 30753594 A JP30753594 A JP 30753594A JP 30753594 A JP30753594 A JP 30753594A JP 3537519 B2 JP3537519 B2 JP 3537519B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- water
- chlorine
- filter medium
- water treatment
- 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.)
- Expired - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は，水中に存在する活性塩
素の処理性能に優れ，その中でも特に処理が困難といわ
れている結合塩素の処理性能に優れた水処理用ろ材に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter medium for water treatment which is excellent in the treatment performance of active chlorine present in water, and particularly excellent in the treatment performance of bound chlorine which is said to be particularly difficult to treat.
【０００２】[0002]
【従来の技術】現在，水道水には殺菌の目的で塩素処理
が施されている。この塩素は水中では分子状塩素（C
l2)，次亜塩素酸（HOCl）や次亜塩素酸イオン(OCl- )
といった遊離塩素と総称される形や，アンモニアや=N-H
型窒素化合物と結合した結合塩素と総称されるクロラミ
ン化合物（NH2Cl,NHCl2, =N-Cl等）及び塩素イオン（Cl
- )や有機物あるいは無機物と反応した各種塩素化合物
の状態で存在している。この中で，後者の塩素イオンや
各種塩素化合物は不活性で, 細菌に対する殺菌性はな
い。また，前者の遊離塩素や結合塩素は活性塩素と呼ば
れ, 酸化作用や塩素化作用が強くて細菌に対する殺菌性
も強く，人が飲用した場合有害となるおそれのあるもの
である。この活性塩素の中で，遊離塩素は特に細菌に対
する殺菌力が強く，有機化合物との反応性も高い。一
方，結合塩素は水中に存在するアンモニアや窒素化合物
と遊離塩素が反応して生じるもので，遊離塩素に比べて
殺菌性も低く，有機物に対する反応性も低いものである
が, 人体に対して有害という面では同様に問題がある。2. Description of the Related Art At present, tap water is chlorinated for the purpose of sterilization. This chlorine is molecular chlorine (C
l 2), hypochlorous acid (HOCl) and hypochlorite ion (OCl -)
Such as ammonia and = NH
Chloramine compounds (NH 2 Cl, NHCl 2 , = N-Cl, etc.) collectively referred to as bound chlorine bonded to a nitrogen compound
- ) And various chlorine compounds that have reacted with organic or inorganic substances. Among these, the latter chloride ions and various chlorine compounds are inactive and do not have bactericidal properties against bacteria. The former free chlorine and combined chlorine are called active chlorine, which have strong oxidizing and chlorinating effects, are highly bactericidal against bacteria, and may be harmful if consumed by humans. Among these active chlorines, free chlorine has a particularly strong bactericidal activity against bacteria and has high reactivity with organic compounds. On the other hand, bound chlorine is formed by the reaction of free chlorine with ammonia and nitrogen compounds present in water, and is less bactericidal and less reactive to organic substances than free chlorine, but harmful to the human body. There is a similar problem in that respect.
【０００３】現在，水道水は水道法施行規則により蛇口
からでた時点で，遊離塩素が 0.1mg／リットル以上存在
しなければならないことが決められており，一般には約
１ｍｇ／リットル程度の遊離塩素が存在している。ちな
みに，一般の人がカルキ臭として感じるのは０．４ｍｇ
／リットル以上の濃度である。水道水が一般にまずいと
いわれる第一の要因のカルキ臭は, この遊離塩素に起因
するものである。At present, it has been determined that tap water must contain 0.1 mg / l or more of free chlorine at the time of leaving the tap according to the regulations of the Water Supply Law. Generally, about 1 mg / l of free chlorine is present. Exists. By the way, 0.4mg is what ordinary people perceive as scent.
/ Liter or more. The first factor that makes tap water generally unpleasant is the chlorine odor, which is attributed to this free chlorine.
【０００４】ところが，近年おいしい水の要求が高ま
り，浄水器等を使用して活性塩素を除去処理して飲用す
ることが多くなってきた。一般の浄水器には処理材とし
て活性炭が広く用いられており，このような浄水器は特
公平４-22616号公報等で提案されている。しかしなが
ら，従来の浄水器に用いられている活性炭はＢＥＴ比表
面積が 700〜1100m2/g程度のもので，粒状のため接触面
積が小さく，吸着速度も遅いため，活性炭の吸着能力を
十分に発揮することができないという問題があった。さ
らに使用に際して初期に炭塵が生じたり，通水圧力が高
くなる等の問題もあった。However, in recent years, the demand for delicious water has increased, and drinking water after removing active chlorine using a water purifier or the like has been increasing. Activated carbon is widely used as a treatment material in general water purifiers, and such a water purifier is proposed in Japanese Patent Publication No. 4-22616. However, the activated carbon used in conventional water purifiers has a BET specific surface area of about 700 to 1100 m 2 / g, and due to its granular nature, the contact area is small and the adsorption speed is slow, so that the activated carbon adsorption capacity is fully demonstrated. There was a problem that you can not. In addition, there are also problems such as the formation of coal dust at the initial stage of use and the increase in water flow pressure.
【０００５】これらの問題を解消するため，繊維状活性
炭を使用した浄水器が特開昭57-35986号公報等で提案さ
れている。繊維状活性炭は吸着速度が速く，通水速度を
高速にしても優れた処理能力を有し，しかも炭塵の流出
がなく，水道水中の赤錆等のろ過性には優れた利点を有
している。さらに，繊維状活性炭は成型が容易で，各種
形状のフイルターに成型することができる利点もある。To solve these problems, a water purifier using fibrous activated carbon has been proposed in Japanese Patent Application Laid-Open No. 57-35986. Activated carbon fibrous has a high adsorption rate, has a high treatment capacity even when the water flow rate is high, has no charcoal dust outflow, and has an excellent filterability of red rust and the like in tap water. I have. Furthermore, fibrous activated carbon has the advantage that it can be easily molded and can be molded into filters of various shapes.
【０００６】しかしながら，この吸着速度の速い繊維状
活性炭を用いても，遊離塩素は十分に除去できるが，結
合塩素は反応性が低いため除去が困難で，通水速度が速
くなると通水初期よりリークするという問題があった。
特に，大都市近辺の水道水中にはアンモニア等の窒素化
合物が多く含まれているためクロラミン化合物といった
結合塩素の含有量も多く，そのリーク量が多いという問
題があった。[0006] However, even when the fibrous activated carbon having a high adsorption rate is used, the free chlorine can be sufficiently removed, but the bound chlorine is difficult to remove due to low reactivity. There was a problem of leaking.
In particular, since tap water near a large city contains a large amount of nitrogen compounds such as ammonia, the content of bound chlorine such as chloramine compounds is large, and there is a problem that the leakage amount is large.
【０００７】[0007]
【発明が解決しようとする課題】本発明は，上記の問題
を解決し，通水速度を速くしても，遊離塩素はもとより
結合塩素も有効に除去できる水処理用ろ材を提供するこ
とを技術的な課題とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and to provide a filter medium for water treatment which can effectively remove not only free chlorine but also bound chlorine even when the flow rate is increased. Is an important task.
【０００８】[0008]
【課題を解決するための手段】本発明者らは，上記の課
題を解決するために鋭意検討した結果，近年開発された
ＢＥＴ比表面積2000m2/g以上の粒状活性炭は，ＢＥＴ比
表面積1100m2/g以下の従来の粒状活性炭からは全く予想
できないほど結合塩素の除去性能が向上することを知見
して本発明に到達した。すなわち, 本発明は，繊維状活
性炭と, ＢＥＴ比表面積2000m2/g以上の粒状活性炭を主
成分とする結合塩素を含んだ水を処理するための水処理
用ろ材を要旨とするものである。なお，本発明でいう比
表面積は，低温窒素吸着法を用いてＢＥＴ法により求め
た値である。Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, recently developed granular activated carbon having a BET specific surface area of 2000 m 2 / g or more has a BET specific surface area of 1100 m 2. The present inventors have found that the performance of removing bound chlorine is improved from the conventional granular activated carbon of not more than / g and can be expected at all. That is, the gist of the present invention is a water treatment filter medium for treating water containing fibrous activated carbon and bound chlorine whose main component is granular activated carbon having a BET specific surface area of 2000 m 2 / g or more. The specific surface area referred to in the present invention is a value obtained by a BET method using a low-temperature nitrogen adsorption method.
【０００９】以下，本発明について詳細に説明する。Hereinafter, the present invention will be described in detail.
【００１０】本発明の水処理用ろ材は, 繊維状活性炭と
粒状活性炭を主成分とするものであるが，水処理用ろ材
を構成する繊維状活性炭としては，石炭ピッチ系，石油
ピッチ系，アクリル系，フェノール系，セルロース系な
どいずれでもよい。また，繊維状活性炭の比表面積は70
0m2/g 以上，特に1000m2/g以上が好ましく，比表面積が
700m2/g 未満では吸着速度，吸着容量ともに低下し，繊
維状活性炭の特長である吸着速度が速い利点が得られ難
く，流通速度を速くすると吸着性能が低下して通水初期
から遊離塩素のリークが起こりやすくなる。また，繊維
状活性炭とともに水処理用ろ材の主成分を構成する粒状
活性炭は，比表面積が2000m2/g以上，好ましくは2500m2
/g以上であれば，椰子殻，石炭コークス，石油コーク
ス，タールピッチ等，いずれを原料として得られたもの
でもよいが，特に助剤として水酸化カリウムを用いて賦
活する方法で得られたものが好ましい。粒状活性炭の比
表面積が2000m2/g未満では結合塩素の除去能力が低く，
通水初期より結合塩素がリークするので好ましくない。[0010] The water treatment filter medium of the present invention is mainly composed of fibrous activated carbon and granular activated carbon. The fibrous activated carbon constituting the water treatment filter medium includes coal pitch type, petroleum pitch type and acrylic. System, phenol system, cellulose system and the like. The specific surface area of fibrous activated carbon is 70%.
0 m 2 / g or more, especially 1000 m 2 / g or more is preferable.
At less than 700 m 2 / g, both the adsorption rate and the adsorption capacity decrease, making it difficult to obtain the advantage of the high adsorption rate, which is the characteristic of fibrous activated carbon. Leaks are more likely to occur. Further, the granular activated carbon with the fibrous activated carbon constituting the main component of the water treatment filter medium has a specific surface area of 2000 m 2 / g or more, preferably 2500 m 2
If it is more than / g, it may be obtained from any of coconut shell, coal coke, petroleum coke, tar pitch, etc., but it is especially obtained by activation using potassium hydroxide as an auxiliary agent. Is preferred. If the specific surface area of the granular activated carbon is less than 2000 m 2 / g, the ability to remove bound chlorine is low,
It is not preferable because the bound chlorine leaks from the beginning of water passage.
【００１１】本発明における粒状活性炭は，一般に呼称
されている粒状及び粉末状のいずれの活性炭でもよい
が，好ましくは平均粒子径が10〜 500μｍのものであ
る。粒状活性炭の平均粒子径が10μｍ未満になると, ろ
材が目詰まりしやすく，圧力損失が大きくて水が流れ難
くなり,500μｍを超えると, 粒子間の空隙が開きすぎて
成型加工が困難となる。The granular activated carbon in the present invention may be any of granular and powdery activated carbons generally called, but preferably has an average particle diameter of 10 to 500 μm. If the average particle size of the granular activated carbon is less than 10 μm, the filter medium is likely to be clogged, and the pressure loss is large, making it difficult for water to flow. If it exceeds 500 μm, the voids between the particles are too open to make molding difficult.
【００１２】本発明の水処理用ろ材は，繊維状活性炭と
比表面積2000m2/g以上の粒状活性炭を主成分とするもの
であるが，繊維状活性炭と粒状活性炭を混合したもの，
個別の層として積層したものあるいはそれらを組み合わ
せたもの等を用いることができる。繊維状活性炭と粒状
活性炭との割合は，重量比で 90/10〜10/90 が好まし
い。ろ材の形状は円筒状，円柱状あるいは粒状に成型し
たもの，あるいはそれらを組み合わせたもの等を用いる
ことができる。The filter medium for water treatment of the present invention is mainly composed of fibrous activated carbon and granular activated carbon having a specific surface area of 2000 m 2 / g or more, and is a mixture of fibrous activated carbon and granular activated carbon.
Those laminated as individual layers or a combination thereof can be used. The ratio of fibrous activated carbon to granular activated carbon is preferably 90/10 to 10/90 by weight. The shape of the filter medium may be a cylinder, a column, or a granule, or a combination thereof.
【００１３】また，本発明の水処理用ろ材は, 繊維状活
性炭と粒状活性炭以外に, ろ材の成型性を向上させるた
めに熱融着可能な低融点ポリエステル，ポリアミドやポ
リエチレン，ポリプロピレン等のポリオレフィン，アク
リル繊維等の合成繊維，あるいは低融点のポリエステル
やポリオレフィンを鞘に，ポリエチレンテレフタレート
を芯に用いた複合繊維等を配合してもよい。さらに，有
機あるいは無機のバインダーを混合し，成型したもので
もよいが, これらの配合量は，５〜50重量％が好まし
い。In addition to the fibrous activated carbon and the granular activated carbon, the water treatment filter medium of the present invention may be a low-melting polyester, a polyolefin such as polyamide, polyethylene or polypropylene, which can be heat-fused to improve the moldability of the filter medium. Synthetic fibers such as acrylic fibers, or composite fibers using polyethylene terephthalate as a core with low melting point polyester or polyolefin as a sheath may be blended. Further, an organic or inorganic binder may be mixed and molded, but the blending amount thereof is preferably 5 to 50% by weight.
【００１４】さらに，本発明の水処理用ろ材の水の流入
側，流出側あるいはその両側に布帛状のフィルターを設
けてもよい。布帛状のフィルターの素材は特に限定され
るものではないが，加工性のよい熱融着性を有する繊維
の織物あるいは不織布であることが好ましく，目付けが
10〜100g/m2 のものが好ましい。また，中空糸膜からな
るろ過フィルターと併用することもできる。Further, a cloth filter may be provided on the inflow side, the outflow side or both sides of the water of the filter medium for water treatment of the present invention. Although the material of the cloth-like filter is not particularly limited, it is preferably a woven or non-woven fabric of a fiber having good processability and heat-fusing property.
Those having 10 to 100 g / m 2 are preferred. It can also be used in combination with a filtration filter consisting of a hollow fiber membrane.
【００１５】次に，本発明の水処理用ろ材の製法例につ
いて説明する。Next, an example of a method for producing the filter medium for water treatment of the present invention will be described.
【００１６】まず，繊維状活性炭と粒状活性炭及び合成
繊維を水槽中に供給し，混合，分散させる。その浴槽中
に円筒状あるいは有底円筒状の成型用金型を浸漬し，吸
引することにより所定形状に成型する。その後，乾燥，
固化させてろ材とする。必要に応じて布帛状のフィルタ
ーを積層する。First, fibrous activated carbon, granular activated carbon and synthetic fibers are supplied into a water tank, mixed and dispersed. A cylindrical or bottomed cylindrical molding die is immersed in the bath and suction-molded to form a predetermined shape. Then dry,
It is solidified to form a filter medium. If necessary, a fabric filter is laminated.
【００１７】また，次の方法で製造することもできる。
まず，繊維状活性炭と熱融着性の合成繊維等を供給して
開繊と混合によりウエッブを形成した後, ニードルパン
チや熱処理を施して目付け50〜300g/m2 の繊維状活性炭
シートを得る。次いで，この繊維状活性炭シートを鉄芯
等にスパイラル状に巻き付けた後, 熱処理を施して円筒
状に成型する。引き続き, 粒状活性炭と合成繊維又は必
要に応じて繊維状活性炭を水槽中に供給し，混合，分散
させた浴槽中に上記で得た円筒状成型体を浸漬し，吸引
させた後，乾燥，固化させてろ材とする。Further, it can be manufactured by the following method.
First, after forming a web by mixing with opening by supplying fibrous activated carbon and heat-sealable synthetic fibers or the like to obtain a fibrous activated carbon sheet having a basis weight of 50 to 300 g / m 2 and subjected to needle punching and heat treatment . Next, the fibrous activated carbon sheet is spirally wound around an iron core or the like, and then heat-treated to form a cylindrical shape. Subsequently, the granular activated carbon and synthetic fibers or, if necessary, fibrous activated carbon are supplied into a water tank, and the cylindrical molded body obtained above is immersed in a mixed and dispersed bath, sucked, dried, and solidified. Let it be a filter medium.
【００１８】その他，前記の繊維状活性炭シートと粒状
活性炭を主成分とするシートを鉄芯等に２層でスパイラ
ル状に巻き付けることにより円筒状ろ材を作成する方
法，繊維状活性炭と粒状活性炭を混合したシートを作成
し, それらを鉄芯等に巻き付けて円筒状ろ材を作成する
方法等を採用することができる。In addition, a method of forming a cylindrical filter medium by spirally winding the above-mentioned fibrous activated carbon sheet and a sheet mainly composed of granular activated carbon in two layers around an iron core or the like, mixing fibrous activated carbon and granular activated carbon It is possible to adopt a method of creating a cylindrical filter medium by creating a wrapped sheet and winding it around an iron core or the like.
【００１９】本発明の水処理用ろ材は，繊維状活性炭と
ＢＥＴ比表面積2000m2/g以上の粒状活性炭を主成分とす
るものであるから，ＢＥＴ比表面積の大きい粒状活性炭
の作用によって結合塩素の除去能力が著しく向上し，ま
た，繊維状活性炭の存在によって，通水速度を速くして
も遊離塩素が処理水中にリークすることがない。The filter medium for water treatment of the present invention is mainly composed of fibrous activated carbon and granular activated carbon having a BET specific surface area of 2000 m 2 / g or more. The removal capacity is remarkably improved, and the presence of fibrous activated carbon prevents free chlorine from leaking into the treated water even if the water flow rate is increased.
【００２０】[0020]
【実施例】次に，本発明を実施例により具体的に説明す
る。Next, the present invention will be described in detail with reference to examples.
【００２１】実施例１，比較例１〜２
比表面積1600m2/gの石炭ピッチ系繊維状活性炭を平均長
さ約３mmに裁断したもの70重量％と, 平均粒径30μｍ,
比表面積2500m2/gの石油コークス系粒状活性炭25重量％
及び平均長さ約５mmのアクリル短繊維５重量％を水槽中
で混合した。次いで，その浴槽に内径50mm，長さ40mmの
円筒状金型を吸引器にセットした状態で投入して吸引し
た後，吸引物を金型より取り出して 130℃で15時間乾燥
し，外径50mm，長さ40mmの円柱状成形体からなる水処理
用ろ材を得た。得られた水処理用ろ材を用い，残留塩素
濃度 1.0ppm,結合塩素濃度0.3ppmが共存する水道水を２
リットル／分で通水し，10％破過点までの通水量を測定
したところ，表１に示す結果が得られた。Example 1, Comparative Examples 1 and 2 70% by weight of a coal pitch fibrous activated carbon having a specific surface area of 1600 m 2 / g cut to an average length of about 3 mm, an average particle size of 30 μm,
Petroleum coke-based granular activated carbon with a specific surface area of 2500 m 2 / g 25% by weight
And 5% by weight of acrylic short fibers having an average length of about 5 mm were mixed in a water bath. Next, a cylindrical mold having an inner diameter of 50 mm and a length of 40 mm is put into the bath and set in a suction device, and then suctioned. The suctioned material is taken out of the mold and dried at 130 ° C. for 15 hours. And a filter medium for water treatment consisting of a columnar molded body having a length of 40 mm was obtained. Using the obtained filter material for water treatment, tap water with residual chlorine concentration of 1.0 ppm and combined chlorine concentration of 0.3 ppm coexist
Water was passed at a rate of 1 liter / minute, and the flow rate up to the 10% breakthrough point was measured. The results shown in Table 1 were obtained.
【００２２】また，比較のために，実施例１と同様に比
表面積1600m2/gの石炭ピッチ系繊維状活性炭を約３mmに
切断したもの95重量％とアクリル短繊維５重量％を混合
したもの（比較例１）と，比表面積2500m2/gの石油コー
クス系粒状活性炭50重量％とアクリル短繊維50重量％を
混合したもの（比較例２）から，実施例１と同様にして
外径50mm，長さ40mmの水処理用ろ材を成型した。これら
の水処理用ろ材を使用し，実施例１と同様にして遊離塩
素と結合塩素の除去性能を測定した。なお，遊離塩素と
結合塩素の濃度は，オルトトリジン法で測定した。得ら
れた結果を表１に併記する。For comparison, as in Example 1, a mixture of 95% by weight of a coal pitch-based fibrous activated carbon having a specific surface area of 1600 m 2 / g cut to about 3 mm and 5% by weight of acrylic short fibers was used. (Comparative Example 1) and a mixture of 50% by weight of petroleum coke-based granular activated carbon having a specific surface area of 2500 m 2 / g and 50% by weight of acryl short fibers were used. A 40 mm long filter medium for water treatment was molded. Using these filter materials for water treatment, the removal performance of free chlorine and bound chlorine was measured in the same manner as in Example 1. The concentrations of free chlorine and bound chlorine were measured by the ortho-tolidine method. The results obtained are also shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】表１から明らかなように，実施例１の水処
理用ろ材は，遊離塩素は勿論のこと，結合塩素について
も優れた除去性能を有していた。一方，繊維状活性炭の
みを主成分とする比較例１は，結合塩素の除去性能が劣
り，また，粒状活性炭のみを主成分とする比較例２は，
遊離塩素の除去性能が劣るものであった。As is evident from Table 1, the filter medium for water treatment of Example 1 had excellent removal performance not only for free chlorine but also for combined chlorine. On the other hand, Comparative Example 1 containing only fibrous activated carbon as the main component was inferior in the performance of removing bound chlorine, and Comparative Example 2 containing only granular activated carbon as the main component was
The removal performance of free chlorine was poor.
【００２５】実施例２，比較例３
繊維状活性炭として比表面積1600m2/gの石炭ピッチ系の
ものを用い，この繊維状活性炭60重量％と，メルティ40
80（ユニチカ社製，ポリエステル系芯鞘型複合バインダ
ー繊維）40重量％の割合でカーディングマシーンで開
繊，混合し，次いでニードルパンチにより交絡させた
後，熱ローラに通し，目付け67g/m2，厚み 0.5mmの繊維
状活性炭シートを得た。Example 2 and Comparative Example 3 As a fibrous activated carbon, a coal pitch type having a specific surface area of 1600 m 2 / g was used.
80 (manufactured by Unitika Ltd., polyester core-sheath composite binder fiber) 40% by weight of the fiber is spread and mixed with a carding machine, and then entangled with a needle punch, passed through a heat roller, and weighed 67 g / m 2. Thus, a fibrous activated carbon sheet having a thickness of 0.5 mm was obtained.
【００２６】次に，ポリエチレンテレフタレートを芯成
分，ポリエチレンを鞘成分とする芯鞘複合繊維で構成し
た目付け30g/m2の不織布をテトラフルオロエチレン樹脂
をコーティングした鉄芯に巻き付け，この上から上記で
得た繊維状活性炭シート一枚をスパイラル状に巻き付
け,150℃で180 分間熱処理して，外径35mm，内径18mm，
長さ125mm の円筒状ろ材を得た。Next, a nonwoven fabric having a basis weight of 30 g / m 2 composed of a core-sheath conjugate fiber having polyethylene terephthalate as a core component and polyethylene as a sheath component is wound around an iron core coated with a tetrafluoroethylene resin. One sheet of the obtained fibrous activated carbon sheet is spirally wound and heat-treated at 150 ° C for 180 minutes to obtain an outer diameter of 35 mm, an inner diameter of 18 mm,
A cylindrical filter medium having a length of 125 mm was obtained.
【００２７】さらに，比表面積1600m2/gの石炭ピッチ系
繊維状活性炭47.5重量％と，平均粒径30μｍ, 比表面積
2500m2/gの石油コークス系粒状活性炭47.5重量％及びア
クリル短繊維５重量％の割合で混合した水槽中に，上記
で得た円筒状ろ材を吸引器にセットして投入し，外から
内に吸引して外径65mmまで成形した。その後,130℃で15
時間乾燥し，外径65mm，内径18mm，長さ125mm の円筒状
をした水処理用ろ材を得た。Further, 47.5% by weight of coal pitch-based fibrous activated carbon having a specific surface area of 1600 m 2 / g, an average particle diameter of 30 μm, and a specific surface area of
The cylindrical filter medium obtained above was set in a water tank mixed with 47.5% by weight of petroleum coke-based granular activated carbon of 2500m 2 / g and 5% by weight of acrylic short fibers, and was put into a suction device. Suction was applied to form an outer diameter of 65 mm. Then at 130 ° C for 15
After drying for a period of time, a cylindrical filter medium for water treatment with an outer diameter of 65 mm, an inner diameter of 18 mm and a length of 125 mm was obtained.
【００２８】また，比較例３として，実施例２で用いた
繊維状活性炭シートのみで，外径65mm，内径18mm，長さ
125mm の水処理用ろ材を形成した。As Comparative Example 3, only the fibrous activated carbon sheet used in Example 2 had an outer diameter of 65 mm, an inner diameter of 18 mm, and a length of
A 125 mm water filter medium was formed.
【００２９】これらの水処理用ろ材を用い，実施例１と
同様にして行った性能評価試験の結果を表２に示す。Table 2 shows the results of performance evaluation tests performed in the same manner as in Example 1 using these filter materials for water treatment.
【００３０】[0030]
【表２】 [Table 2]
【００３１】表２から明らかなように，実施例２の水処
理用ろ材は，遊離塩素は勿論のこと，結合塩素について
も優れた除去性能を有していた。一方，繊維状活性炭の
みを主成分とする比較例３は，遊離塩素の除去性能は優
れていたが，結合塩素の除去性能が劣るものであった。As is evident from Table 2, the filter medium for water treatment of Example 2 had excellent removal performance not only for free chlorine but also for combined chlorine. On the other hand, Comparative Example 3 containing only fibrous activated carbon as a main component had excellent performance of removing free chlorine, but was inferior in performance of removing bound chlorine.
【００３２】[0032]
【発明の効果】本発明の水処理用ろ材は，繊維状活性炭
と特殊な粒状活性炭の組み合わせにより，遊離塩素のみ
ならず，結合塩素の除去能力にも優れており，家庭用や
業務用の浄水器用のろ材として好適なものである。The filter medium for water treatment of the present invention is excellent in not only free chlorine but also combined chlorine removal ability by combining fibrous activated carbon and special granular activated carbon, and is used for domestic and commercial water purification. It is suitable as a dexterous filter medium.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 39/14 B01J 20/20 C02F 1/28 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) B01D 39/14 B01J 20/20 C02F 1/28
Claims (1)
/g以上の粒状活性炭を主成分とする結合塩素を含んだ水
を処理するための水処理用ろ材。1. Fibrous activated carbon and a BET specific surface area of 2000 m 2
Water treatment media for treating water containing bound chlorine whose main component is granular activated carbon of at least / g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30753594A JP3537519B2 (en) | 1994-12-12 | 1994-12-12 | Filter media for water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30753594A JP3537519B2 (en) | 1994-12-12 | 1994-12-12 | Filter media for water treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08164333A JPH08164333A (en) | 1996-06-25 |
| JP3537519B2 true JP3537519B2 (en) | 2004-06-14 |
Family
ID=17970268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30753594A Expired - Lifetime JP3537519B2 (en) | 1994-12-12 | 1994-12-12 | Filter media for water treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3537519B2 (en) |
-
1994
- 1994-12-12 JP JP30753594A patent/JP3537519B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08164333A (en) | 1996-06-25 |
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