JP3440101B2 - Ceramic membrane filter for water purifier - Google Patents
Ceramic membrane filter for water purifierInfo
- Publication number
- JP3440101B2 JP3440101B2 JP01220392A JP1220392A JP3440101B2 JP 3440101 B2 JP3440101 B2 JP 3440101B2 JP 01220392 A JP01220392 A JP 01220392A JP 1220392 A JP1220392 A JP 1220392A JP 3440101 B2 JP3440101 B2 JP 3440101B2
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- membrane filter
- water purifier
- film
- water
- 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
- 239000012528 membrane Substances 0.000 title claims description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 49
- 239000000919 ceramic Substances 0.000 title claims description 28
- 239000011148 porous material Substances 0.000 claims description 32
- 230000035699 permeability Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000001580 bacterial effect Effects 0.000 description 4
- 239000012510 hollow fiber Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 241000317803 Pseudoxya diminuta Species 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008029 eradication Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、支持体、中間膜、膜か
ら構成される浄水器用セラミック膜フィルタに関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic membrane filter for a water purifier composed of a support, an intermediate membrane and a membrane.
【０００２】[0002]
【従来の技術】ここ数年来、水道水がまずくなっている
ことが強く指摘されるようになった。その原因として
は、塩素、サビ、カルキ臭、細菌等が挙げられている。
さらに、最近では、発ガン物質であるトリハロメタンが
水道水中に存在することも指摘されている。こうした事
情から、人体にとっての有害物質を除去する家庭用浄水
器が注目されつつある。現在知られている浄水器は、活
性炭と中空糸膜フィルタとを併用したタイプのものが多
く、活性炭で除去しきれないサビや細菌を、中空糸膜の
持つ精密濾過作用によって除去している。その一例とし
て、特開平２ー１９８６８４号公報に、中空糸膜フィル
タを使用した浄水器が開示されている。2. Description of the Related Art It has been strongly pointed out that tap water has become unusable for several years. The causes include chlorine, rust, chlorine odor, bacteria and the like.
Furthermore, it has recently been pointed out that the carcinogen trihalomethane is present in tap water. Under these circumstances, household water purifiers that remove harmful substances to the human body are attracting attention. Many of the currently known water purifiers use a combination of activated carbon and a hollow fiber membrane filter, and remove rust and bacteria that cannot be removed by activated carbon by the microfiltration function of the hollow fiber membrane. As one example thereof, Japanese Patent Laid-Open No. 2-198684 discloses a water purifier using a hollow fiber membrane filter.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
中空糸膜フィルタを用いた浄水器は、高い浄化機能を有
するものの、目詰まりを生じた場合に再使用ができず、
廃棄せざるを得ない等の種々の問題があった。そのた
め、近年、支持体、中間膜、膜から構成されるセラミッ
ク膜フィルタを使用した浄水器が注目をあびている。し
かしながら、産業用としては従来からセラミック膜フィ
ルタが使用され、種々の構造のセラミック膜フィルタが
公知であるが、浄水器特に家庭用の浄水器としてセラミ
ック膜フィルタを使用した例は少なく、最適なセラミッ
ク膜フィルタを得るための条件が、いまだ明瞭となって
いない問題があった。However, although a conventional water purifier using a hollow fiber membrane filter has a high purification function, it cannot be reused when clogging occurs,
There were various problems such as inevitable disposal. Therefore, in recent years, a water purifier using a ceramic membrane filter composed of a support, an intermediate membrane, and a membrane has attracted attention. However, ceramic membrane filters have been conventionally used for industrial use, and ceramic membrane filters of various structures are known, but there are few examples of using ceramic membrane filters as water purifiers, especially household water purifiers, and the optimum ceramics There is a problem that the conditions for obtaining the membrane filter have not been clarified yet.
【０００４】本発明の目的は上述した課題を解消して、
家庭用浄水器用として最適なセラミック膜フィルタを提
供しようとするものである。The object of the present invention is to solve the above problems,
It is intended to provide an optimal ceramic membrane filter for a home water purifier.
【０００５】[0005]
【課題を解決するための手段】本発明の浄水器用セラミ
ック膜フィルタは、支持体、中間膜、膜から構成され
る、水処理能力４ｌ／分以上の浄水器に使用するセラミ
ック膜フィルタにおいて、支持体の平均細孔径を５〜２
０μｍとし、中間膜の平均細孔径を１〜３μｍで膜厚を
２０〜７０μｍとし、膜の平均細孔径を０．２〜０．８
μｍで膜厚を２０〜７０μｍとし、かつ、膜面積が０．
２〜０．２４ｍ２であり、セラミック膜フィルタの透水
量が１ｍ３／ｍ２・ｈｒ（ΔＰ＝１ｋｇ／ｃｍ２）以上
であることを特徴とするものである。The ceramic membrane filter for a water purifier of the present invention is a ceramic membrane filter for use in a water purifier having a water treatment capacity of 4 l / min or more, which is composed of a support, an intermediate membrane and a membrane. The average pore size of the body is 5 to 2
0 μm, the average pore size of the intermediate film is 1 to 3 μm, the film thickness is 20 to 70 μm, and the average pore size of the membrane is 0.2 to 0.8 μm.
The film thickness is 20 to 70 μm and the film area is 0.
A 2~0.24m 2, is characterized in that the water permeability of the ceramic membrane filter is 1m 3 / m 2 · hr ( ΔP = 1kg / cm 2) or more.
【０００６】[0006]
【作用】上述した構成において、本発明は、支持体、中
間膜、膜の平均細孔径を一定の範囲に限定するととも
に、中間膜および膜の膜厚をも一定範囲に限定すること
により、後述する実施例から明らかなように、浄水器特
に家庭用浄水器として最適なセラミック膜フィルタを得
ることができることを見いだしたことによる。In the above-mentioned constitution, the present invention limits the average pore diameters of the support, the intermediate film and the membrane to a certain range, and also limits the film thickness of the intermediate film and the membrane to a certain range. As is clear from the examples described above, it was found that a ceramic membrane filter most suitable for a water purifier, particularly a household water purifier, can be obtained.
【０００７】ここで、支持体の平均細孔径を５〜２０μ
m と限定したのは、支持体の平均細孔径が５μm 未満で
あると成膜後透水量が低くなるとともに、２０μm を越
えると細孔が大きくてフィルタ形状に成形できないため
である。また、中間膜の平均細孔径を１〜３μm と限定
したのは、中間膜の平均細孔径が１μm 未満であると成
膜後透水量が低くなるとともに、３μm を越えると細孔
が大きくて膜成膜時に膜原料が細孔を通過して成膜がで
きなくなるためである。さらに、中間膜の膜厚を２０μ
m 以上と限定したのは、中間膜の膜厚が２０μm 未満で
あると中間膜成膜時に欠陥が発生し、膜成膜後も欠陥と
して残り（最大気孔径不良）除菌性能がでないためであ
り、この膜厚が７０μm を越えると中間膜が厚くなりす
ぎて透水量が低くなる場合があるため、７０μm 以下で
あると好ましい。The average pore diameter of the support is 5 to 20 μm.
The reason for limiting m to m is that if the average pore size of the support is less than 5 μm, the water permeation amount after film formation is low, and if it exceeds 20 μm, the pores are large and cannot be formed into a filter shape. The average pore size of the interlayer film is limited to 1 to 3 μm because the water permeability after film formation is low when the average pore size of the interlayer film is less than 1 μm, and the pores are large when it exceeds 3 μm. This is because the film material cannot pass through the pores during film formation to form a film. In addition, the thickness of the intermediate film is 20μ
The reason for limiting to m or more is that when the film thickness of the intermediate film is less than 20 μm, a defect occurs during the film formation of the intermediate film, and it remains as a defect after the film formation (maximum pore size defect), and there is no sterilization performance. However, if the film thickness exceeds 70 μm, the intermediate film may become too thick and the water permeation amount may decrease, so that the film thickness is preferably 70 μm or less.
【０００８】また、膜の平均細孔径を０．２〜０．８μ
m と限定したのは、膜の平均細孔径が０．２μm 未満で
あると透水量が低くなるとともに、０．８μm を越える
と除菌性能がでないためである。さらに、膜の膜厚を２
０μm 以上と限定したのは、膜厚が２０μm 未満である
と除菌性能がでないためであり、この膜厚が７０μmを
越えると透水量が低くなるためである。The average pore size of the membrane is 0.2 to 0.8 μm.
The reason for limiting m to m is that when the average pore size of the membrane is less than 0.2 μm, the water permeation amount becomes low, and when it exceeds 0.8 μm, the sterilization performance is not obtained. Furthermore, the film thickness is set to 2
The reason why the film thickness is limited to 0 μm or more is that the sterilization performance is not obtained when the film thickness is less than 20 μm, and the water permeation amount becomes low when the film thickness exceeds 70 μm.
【０００９】[0009]
【実施例】図１は本発明の浄水器用セラミック膜フィル
タの一例の構成を示す斜視図である。図１において、円
柱形状の支持体１の長手方向に複数本の貫通孔２を開け
て、本発明の浄水器用セラミック膜フィルタ３を得てい
る。ここで、支持体１の平均細孔径は５〜２０μm の範
囲に存在する必要がある。図２は本発明の浄水器用セラ
ミック膜フィルタ３の貫通孔２の詳細な説明を行うため
の部分断面図である。本実施例では、図２にその断面を
示すように、支持体１の貫通孔２を形成する面に、支持
体１と接して中間膜５を、さらに中間膜５の表面に膜４
を設け、貫通孔２内を通過する液体等と膜４が接する構
造をとっている。そのため、貫通孔２を通過する液体等
の被濾過物質は、膜４、中間膜５、支持体１の順に通り
抜けて、濾過動作を行うよう構成されている。1 is a perspective view showing the structure of an example of a ceramic membrane filter for a water purifier according to the present invention. In FIG. 1, a plurality of through holes 2 are opened in the longitudinal direction of a cylindrical support 1 to obtain a ceramic membrane filter 3 for a water purifier of the present invention. Here, the average pore diameter of the support 1 must be in the range of 5 to 20 μm. FIG. 2 is a partial cross-sectional view for explaining the through hole 2 of the ceramic membrane filter 3 for a water purifier of the present invention in detail. In the present embodiment, as shown in the cross section in FIG. 2, the intermediate film 5 is in contact with the support 1 on the surface of the support 1 on which the through holes 2 are formed, and the film 4 is formed on the surface of the intermediate film 5.
Is provided so that the liquid or the like passing through the through hole 2 is in contact with the film 4. Therefore, the substance to be filtered such as a liquid passing through the through hole 2 is configured to pass through the membrane 4, the intermediate membrane 5, and the support 1 in this order to perform the filtering operation.
【００１０】以下、実際の例について説明する。実施例
まず、多孔質支持体Ａとして、外径３０ｍｍ、長さ２０
０ｍｍの外形形状を有するとともに、直径３ｍｍで長さ
方向に並列して延びる３７本の内孔を有するモノリス構
造を有するもので、所望の平均細孔径を具備したアルミ
ナを主成分とする押出成形物の焼結体を準備するととも
に、多孔質支持体Ｂとして、外径５０ｍｍ、長さ２００
ｍｍの外形形状を有するとともに、直径３ｍｍで長さ方
向に並列して延びる１２７本の内孔を有するモノリス構
造を有するもので、所望の平均細孔径を具備したアルミ
ナを主成分とする押出成形物の焼結体を準備した。An actual example will be described below. Example First, as the porous support A, an outer diameter of 30 mm and a length of 20
An extruded product having an outer shape of 0 mm and having a monolith structure having a diameter of 3 mm and 37 inner holes extending in parallel in the longitudinal direction and having alumina as a main component and having a desired average pore diameter. And a porous support B having an outer diameter of 50 mm and a length of 200
An extruded product containing alumina as a main component and having a desired average pore diameter, which has a monolith structure having an outer shape of mm and a diameter of 3 mm and extending in parallel in the length direction with 127 inner holes. Was prepared.
【００１１】次に、中間膜として、所望の平均細孔径と
なるAl2O3 粉末を原料とし、ポリカルボン酸アンモニウ
ム０．５ｗｔ％を解膠剤として用い、粘結剤としてポリ
アクリル酸を１ｗｔ％加えて水分９５ｗｔ％のスラリー
を調整し、得られたスラリーを用いて動加圧真空法にて
多孔質支持体ＡおよびＢの各内孔周面にコーティング
し、乾燥後、1400〜1500℃の温度で焼成して、以下の表
１に示すように種々の平均細孔径および厚さを有する中
間層を得た。なお、動加圧真空法は、たとえば特開昭６
１ー２３８３１５号公報において開示された装置を使用
して、コーティングに先立って支持体を水中で３時間煮
沸して脱泡し、圧力容器内の真空度を７３０ｍｍＨｇ〜
７４０ｍｍＨｇとし、スラリーの支持体の内周面に対す
る液圧を２ｋｇ／ｃｍ2 でその流動接触時間を１分２０
秒間とするとともに、スラリー排出後上記真空下で５分
間減圧脱水している。Next, as an intermediate film, Al 2 O 3 powder having a desired average pore diameter was used as a raw material, 0.5 wt% of ammonium polycarboxylate was used as a peptizing agent, and 1 wt% of polyacrylic acid was used as a binder. % To prepare a slurry having a water content of 95 wt%, and using the obtained slurry, the inner peripheral surface of each of the porous supports A and B is coated by a dynamic pressure vacuum method, and after drying, 1400-1500 ° C. Calcination at a temperature of 10 to obtain intermediate layers having various average pore diameters and thicknesses as shown in Table 1 below. The dynamic pressure vacuum method is disclosed in, for example, Japanese Patent Laid-Open No.
Using the apparatus disclosed in JP-A 1-238315, the support is boiled in water for 3 hours to defoam before coating, and the degree of vacuum in the pressure vessel is 730 mmHg.
740 mmHg, the fluid pressure of the slurry on the inner surface of the support is 2 kg / cm 2 , and the fluid contact time is 1 minute 20.
In addition to the second, the slurry is discharged and then dehydrated under reduced pressure for 5 minutes under the above vacuum.
【００１２】最後に、膜として、所望の平均細孔径とな
るAl2O3 粉末を原料とし、ポリカルボン酸アンモニウム
０．５ｗｔ％を解膠剤として用い、粘結剤としてポリア
クリル酸を１ｗｔ％加えて水分９５ｗｔ％のスラリーを
調整し、得られたスラリーを用いて動加圧真空法にて焼
結後の中間膜上にコーティングし、乾燥後、1400〜1500
℃の温度で焼成して、以下の表１に示すように種々の平
均細孔径および厚さを有する膜を形成し、最終的なセラ
ミック膜フィルタを得た。Finally, as a film, Al 2 O 3 powder having a desired average pore size is used as a raw material, 0.5 wt% of ammonium polycarboxylate is used as a peptizing agent, and 1 wt% of polyacrylic acid is used as a binder. In addition, a slurry having a water content of 95 wt% was prepared, and the obtained slurry was used to coat the intermediate film after sintering by a dynamic pressure vacuum method, and after drying, 1400-1500
Firing at a temperature of ° C to form membranes with various average pore sizes and thicknesses, as shown in Table 1 below, resulted in final ceramic membrane filters.
【００１３】得られたセラミック膜フィルタに対し、そ
の支持体、中間膜、膜の平均細孔径と、中間膜および膜
の膜厚と、透水量および菌体阻止率を測定した。結果を
表１に示す。なお、支持体の細孔径は水銀ポロシメータ
により、また中間膜および目の細孔径は水中発泡法によ
り、それぞれ求めた。また、中間膜および膜の膜厚は、
断面に対する走査型電子顕微鏡写真から求めた。さら
に、透水量は、１ｋｇ／ｃｍ2 の圧力の水を一端を塞い
だセラミック膜フィルタの内孔（貫通孔）内に送水し、
内孔膜面積当たりの透水量を測定した。さらにまた、菌
体阻止率は、水に「P.diminuta」という試験菌を約 8.0
×105 個／ｍｌマーカーとして入れて母液とし、この母
液をセラミック膜フィルタの貫通孔の内側から外側へ通
して直接濾過法により濾過し、菌体阻止率を、菌体阻止
率（％）＝｛（濾液中の菌数（個））／（母液中の菌数
（個））｝×１００より算出した。With respect to the obtained ceramic membrane filter, the support, the intermediate membrane, the average pore diameter of the membrane, the thickness of the intermediate membrane and the membrane, the water permeation rate and the bacterial cell rejection rate were measured. The results are shown in Table 1. The pore size of the support was determined by a mercury porosimeter, and the pore sizes of the intermediate film and the mesh were determined by an underwater foaming method. The thickness of the intermediate film and the film is
It was determined from a scanning electron micrograph of the cross section. Further, the water permeation rate is such that water having a pressure of 1 kg / cm 2 is fed into the inner hole (through hole) of the ceramic membrane filter having one end blocked,
The amount of water permeation per inner pore membrane area was measured. Furthermore, the microbial cell inhibition rate is about 8.0 for the test bacterium "P. diminuta" in water.
× 10 5 pieces / ml As a marker, a mother liquor was obtained. The mother liquor was filtered from the inside to the outside of the through hole of the ceramic membrane filter by a direct filtration method to determine the bacterial cell inhibition rate (%). It was calculated from {(number of bacteria in filtrate (pieces)) / (number of bacteria in mother liquor (pieces)) × 100.
【００１４】なお、ΔＰを濾過差圧とした場合、浄水器
としての水処理能力は４ｌ／分以上（ΔＰ＝１ｋｇ／ｃ
ｍ2 ）が必要であり、また浄水器としての膜面積は０．
２〜０．２４ｍ2 である必要があるため、浄水器として
のセラミック膜フィルタの透水量は１ｍ3 ／ｍ2 ・ｈｒ
以上（ΔＰ＝１ｋｇ／ｃｍ2 ）必要となる。また、菌体
は１個でも漏れると繁殖し増加するので、菌体阻止率は
１００％（完全除菌）でなければならない。これらの観
点から、上記両条件のいずれかを満たしていない例を、
本発明外として備考欄において×印を付した。また、支
持体の欄の平均細孔径のあとの符号は、支持体の形状を
示す。When ΔP is the filtration pressure difference, the water treatment capacity of the water purifier is 4 l / min or more (ΔP = 1 kg / c
m 2 ) is required, and the membrane area as a water purifier is 0.
Since it needs to be 2 to 0.24 m 2 , the water permeation rate of the ceramic membrane filter as a water purifier is 1 m 3 / m 2 · hr.
The above (ΔP = 1 kg / cm 2 ) is required. Further, if even one microbial cell leaks, it proliferates and increases, so the microbial cell inhibition rate must be 100% (complete eradication). From these points of view, examples that do not meet either of the above conditions,
A mark x is added in the remarks column as outside the scope of the present invention. Further, the symbol after the average pore diameter in the column of the support shows the shape of the support.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１の結果から、支持体、中間膜、膜の平
均細孔径や膜厚において本発明の要件をすべて満たす例
は、透水量および菌体阻止率の両条件を満足するのに対
し、いずれかの点で本発明の要件を満たしていない例
は、透水量または菌体阻止率のいずれかまたは両者を満
たさないことがわかる。From the results shown in Table 1, in the case where the support, the intermediate membrane, the average pore diameter of the membrane and the membrane thickness all satisfy the requirements of the present invention, both conditions of the water permeation rate and the cell inhibition rate are satisfied. It is understood that the examples which do not satisfy the requirements of the present invention in any point do not satisfy either or both of the water permeation rate and the bacterial cell inhibition rate.
【００１７】[0017]
【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、支持体、中間膜、膜の平均細孔径および中間
膜、膜の膜厚を一定範囲に限定することにより、浄水器
として必要な透水量および菌体阻止率を得ることがで
き、浄水器用として最適なセラミック膜フィルタを得る
ことができる。As is clear from the above description, according to the present invention, the water purifier is limited by limiting the support, the intermediate membrane, the average pore diameter of the membrane and the thickness of the intermediate membrane and the membrane to a certain range. As a result, it is possible to obtain the required water permeation rate and bacterial cell rejection rate, and it is possible to obtain an optimum ceramic membrane filter for a water purifier.
【図１】本発明の浄水器用セラミック膜フィルタの一例
の構成を示す斜視図である。FIG. 1 is a perspective view showing the configuration of an example of a ceramic membrane filter for a water purifier according to the present invention.
【図２】本発明の浄水器用セラミック膜フィルタの貫通
孔の詳細な説明を行うための部分断面図である。FIG. 2 is a partial cross-sectional view for explaining in detail a through hole of the ceramic membrane filter for a water purifier of the present invention.
１ 支持体 ２ 貫通孔 ３ セラミック膜フィルタ ４ 膜 ５ 中間膜 1 support 2 through holes 3 Ceramic membrane filter 4 membranes 5 Intermediate film
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 71/02 C02F 1/44 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B01D 71/02 C02F 1/44
Claims (2)
理能力４ｌ／分以上の浄水器に使用するセラミック膜フ
ィルタにおいて、支持体の平均細孔径を５〜２０μｍと
し、中間膜の平均細孔径を１〜３μｍで膜厚を２０〜７
０μｍとし、膜の平均細孔径を０．２〜０．８μｍで膜
厚を２０〜７０μｍとし、かつ、膜面積が０．２〜０．
２４ｍ ２ であり、セラミック膜フィルタの透水量が１ｍ
３ ／ｍ ２ ・ｈｒ（ΔＰ＝１ｋｇ／ｃｍ ２ ）以上であるこ
とを特徴とする浄水器用セラミック膜フィルタ。1. A water treatment comprising a support, an intermediate film and a film.
In a ceramic membrane filter used in a water purifier with a capacity of 4 l / min or more , the support has an average pore diameter of 5 to 20 μm, the intermediate membrane has an average pore diameter of 1 to 3 μm, and a membrane thickness of 20 to 7 μm.
0 μm, the average pore size of the membrane is 0.2 to 0.8 μm, the film thickness is 20 to 70 μm , and the membrane area is 0.2 to 0.
24m 2 and the water permeability of the ceramic membrane filter is 1m
A ceramic membrane filter for a water purifier, characterized by having a ratio of 3 / m 2 · hr (ΔP = 1 kg / cm 2 ) or more .
ることを特徴とする請求項１記載の浄水器用セラミックThe ceramic for water purifier according to claim 1, characterized in that
膜フィルタ。Membrane filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01220392A JP3440101B2 (en) | 1992-01-27 | 1992-01-27 | Ceramic membrane filter for water purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01220392A JP3440101B2 (en) | 1992-01-27 | 1992-01-27 | Ceramic membrane filter for water purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05200259A JPH05200259A (en) | 1993-08-10 |
| JP3440101B2 true JP3440101B2 (en) | 2003-08-25 |
Family
ID=11798845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01220392A Expired - Lifetime JP3440101B2 (en) | 1992-01-27 | 1992-01-27 | Ceramic membrane filter for water purifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3440101B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5036211B2 (en) * | 2006-04-17 | 2012-09-26 | 株式会社ニッカトー | Ceramic filter and manufacturing method thereof |
| US8393478B2 (en) * | 2007-02-27 | 2013-03-12 | Corning Incorporated | Inorganic membranes and method of making |
-
1992
- 1992-01-27 JP JP01220392A patent/JP3440101B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05200259A (en) | 1993-08-10 |
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