JP2787708B2 - Ceramic filter medium and method for producing the same - Google Patents
Ceramic filter medium and method for producing the sameInfo
- Publication number
- JP2787708B2 JP2787708B2 JP1135937A JP13593789A JP2787708B2 JP 2787708 B2 JP2787708 B2 JP 2787708B2 JP 1135937 A JP1135937 A JP 1135937A JP 13593789 A JP13593789 A JP 13593789A JP 2787708 B2 JP2787708 B2 JP 2787708B2
- Authority
- JP
- Japan
- Prior art keywords
- filter medium
- filtration
- ceramic filter
- filter
- plate
- 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
Landscapes
- Filtering Materials (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、水処理の急速濾過に好ましく適用できるセ
ラミック濾過材およびその製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a ceramic filter medium preferably applicable to rapid filtration of water treatment and a method for producing the same.
従来、急速濾過に使用する濾過材は、機械的強度、化
学的安定性、価格等の配慮からアルミナ（Al2O3）、シ
リカ（SiO2）、アルミナ／シリカ集合体（Al2O3/Si
O2）、各種ゼオライト或いはけいそう土等が用いられて
いる。これらの濾過材は、真比重が２〜３と大きく、有
効径の範囲も比較的大きく、しかも均等係数が1.7以上
である。Conventionally, filter materials used for rapid filtration include alumina (Al 2 O 3 ), silica (SiO 2 ), and alumina / silica aggregate (Al 2 O 3 /) in consideration of mechanical strength, chemical stability, price and the like. Si
O 2 ), various zeolites or diatomaceous earth are used. These filter media have a large true specific gravity of 2 to 3, a relatively large effective diameter range, and a uniformity coefficient of 1.7 or more.
ところが、これらの濾過材を使用する場合は、汚濁物
質の除去率を高めるために小さい径のものを用いると、
表面濾過（濾層の表面のみで汚濁物質を除去する）とな
り、濾過継続時間が短く、損失水頭が早く発生し、逆洗
の頻度が多くなる。However, when using these filter materials, if a small diameter is used to increase the removal rate of pollutants,
Surface filtration (removing contaminants only on the surface of the filter layer) results in a short filtration duration, early head loss, and frequent backwashing.
反対に大きな径の濾過材を用いる場合は、汚濁物質の
除去率を高めるために、濾層を高くすると共に濾過材の
均等係数を極力小さくする必要がある。よってこの場合
には濾過材の充填量が増大し、逆洗水量の増大化が避け
られず、場合によっては空気、水併用の逆洗が必要とさ
れ、装置、操作等が増大繁雑化する。Conversely, when a filter medium having a large diameter is used, it is necessary to increase the height of the filter layer and minimize the uniformity coefficient of the filter medium in order to increase the removal rate of pollutants. Therefore, in this case, the filling amount of the filter medium increases, and an increase in the amount of backwash water is unavoidable. In some cases, backwashing using both air and water is required, and the apparatus and operation are increased and complicated.
また、これらの濾過材は物理的強度が弱く、逆洗等の
繰返しにより劣化変形し易く寿命が短い等の問題もあっ
た。In addition, these filter materials have problems such as low physical strength, easy deterioration and deformation due to repeated backwashing and the like, and short life.
本発明の目的は、汚濁物質の除去効率及び逆洗効率が
優れ、かつ物理的強度が大きいセラミック濾過材および
その製造方法を提供することである。An object of the present invention is to provide a ceramic filter medium which has excellent removal efficiency and backwashing efficiency of pollutants and high physical strength, and a method for producing the same.
このために第１の発明のセラミック濾過材は、30％以
上のAl2O3成分を含み、多数の気孔を有し、粒径0.5〜1.
0mm、見掛け比重0.6〜0.8、比表面積1m2/g以上の物理特
性を有するようにした。For this reason, the ceramic filter medium of the first invention contains an Al 2 O 3 component of 30% or more, has a large number of pores, and has a particle size of 0.5 to 1.
It had physical properties of 0 mm, an apparent specific gravity of 0.6 to 0.8, and a specific surface area of 1 m 2 / g or more.
第２の発明のセラミック濾過材の製法は、遊離珪酸を
含まないカオリン40〜60％、水酸化アルミニュウム０〜
５％、マグネサイトまたは海水マグ仮焼物10〜25％、遊
離珪砂を含まない水簸粘土10〜25％を調合する工程と、
該調合物に水を添加して上記調合物を微粉砕した後フィ
ルタープレスで脱水し混練した後板状物に整形する工程
と、該板状物を1380〜1410℃の温度範囲で焼成する工程
と、焼成した上記板状物を粉砕し、篩分して粒度調整す
る工程とを有するようにした。The method for producing the ceramic filter medium of the second invention is as follows: kaolin 40 to 60% containing no free silicic acid, aluminum hydroxide 0 to 0%.
Blending 5%, magnesite or seawater mug calcined material 10-25%, elutriated clay 10-25% free of free silica sand,
A step of shaping the mixture into a plate after adding water to the mixture to pulverize the mixture, dehydrating and kneading the mixture with a filter press, and firing the plate in a temperature range of 1380 to 1410 ° C. And a step of pulverizing the baked plate-like material and sieving to adjust the particle size.
以下、本発明の一実施例のセラミック濾過材およびそ
の製造方法について説明する。本実施のセラミック濾過
材は、30％以上のAl2O3成分を含み、多数の気孔を有
し、粒径0.5〜1.0mm、見掛け比重0.6〜0.8、比表面積1m
2/g以上の物理的性質を有するものである。Hereinafter, a ceramic filter medium of one embodiment of the present invention and a method of manufacturing the same will be described. The ceramic filter medium of the present embodiment contains an Al 2 O 3 component of 30% or more, has many pores, a particle size of 0.5 to 1.0 mm, an apparent specific gravity of 0.6 to 0.8, and a specific surface area of 1 m.
It has physical properties of 2 / g or more.
製造方法は第１図に示す工程で行う。まず、遊離珪酸
を含まないカオリン〔主成分Al2Si2O5（OH）４〕40〜65
％、水酸化アルミニュウム〔Al（OH）３〕０〜５％、マ
グネサイト（MgCO3）または海水マグ仮焼物10〜25％、
遊離珪酸を含まない水簸粘土20〜35％を調合し、トロン
ミル内にて水を添加して微粉砕する。ここで得られたス
ラリ状物をフィルタープレスで脱水しオーガーマシンに
て混練した後板状に整形する。The manufacturing method is performed in the steps shown in FIG. First, kaolin no free silicate [main component Al 2 Si 2 O 5 (OH ) 4 ] 40-65
%, Aluminum hydroxide [Al (OH) 3 ] 0-5%, magnesite (MgCO 3 ) or seawater mug calcined 10-25%,
20-35% of elutriated clay containing no free silicic acid is prepared and finely pulverized by adding water in a tron mill. The obtained slurry is dehydrated with a filter press, kneaded with an auger machine, and shaped into a plate.
次にこの板状物を乾燥後、トンネル窯にてSK13（1380
℃）〜SK14（1410℃）の温度範囲で焼成する。その後に
焼成した板状物をクラッャーにて粗粉砕し、篩分し0.5
〜1.0mmの粒径に粒度調整して完了する。Next, after drying this plate-like material, SK13 (1380
(° C) to SK14 (1410 ° C). Thereafter, the calcined plate is roughly crushed with a crusher, sieved and sieved.
Finish by adjusting the particle size to ~ 1.0mm particle size.
以上の製造工程で得られた本発明の濾過材の性能試験
結果は下記の通りである。なお、一部の試験項目につい
ては従来濾過材の試験結果も比較のため記載した。The performance test results of the filter material of the present invention obtained in the above manufacturing steps are as follows. In addition, about some test items, the test result of the conventional filtration material was also described for comparison.
本濾過材の成分 SiO2 ……50.0％ Al2O3……33.1％ Fe2O3…… 2.4％ MgO ……12.4％ CaO …… 0.3％ Na2O …… 0.9％ K2O …… 0.9％ 本濾過材の粒度 9メッシュ…… 0.30％ 12メッシュ…… 1.89％ 16メッシュ……45.56％ 24メッシュ……43.97％ 32メッシュ…… 8.08％ 70メッシュ…… 0.10％ 試験例１ 本発明の濾過材を用いて除濁濾過試験を行ったところ
次の結果を得た。 Components of this filter media SiO 2 … 50.0% Al 2 O 3 … 33.1% Fe 2 O 3 … 2.4% MgO… 12.4% CaO… 0.3% Na 2 O… 0.9% K 2 O… 0.9 % Mesh size 9 mesh 0.30% 12 mesh 1.89% 16 mesh 45.56% 24 mesh 43.97% 32 mesh 8.08% 70 mesh 0.10% Test Example 1 Filter material of the present invention The following results were obtained when a turbidity filtration test was performed using
試験条件 濾過材 サンプル１ 見掛け比重 0.7 成分Al2O3 32.0％ SiO2 47.5％ Fe2O3 1.8％ MgO 9.0％ 濾層高さ 350mm 原水 プール水 上記条件の試験結果、次表に示すような良好な濁度除
去効果が得られた。Test conditions Filtration material Sample 1 Apparent specific gravity 0.7 component Al 2 O 3 32.0% SiO 2 47.5% Fe 2 O 3 1.8% MgO 9.0% Filter layer height 350mm Raw water Pool water The test results under the above conditions are good as shown in the following table A turbidity removing effect was obtained.
ここで、従来の濾過材と比較するために従来の濾過材
に対する上記と同じ条件による試験結果を次表に示す。 Here, the following table shows the test results of the conventional filter medium under the same conditions as above for comparison with the conventional filter medium.
試験例２ 第２図は本発明の濾過材と従来の濾過材による連続通
水の汚濁除去濾過の比較試験結果である。 Test Example 2 FIG. 2 shows the results of a comparison test of the continuous filtration of water through the use of the filter medium of the present invention and the conventional filter medium.
この比較試験結果によれば本発明の濾過材による濾過
は濾過開始時点から従来の濾過材による濾過より濁度の
リークが少ないことが認められる。According to the results of this comparative test, it is recognized that the filtration by the filtration material of the present invention has less turbidity leakage than the filtration by the conventional filtration material from the start of filtration.
また本発明の濾過材による濾過は約36時間までは濁度
のリークの立上がり（除去率90〜80％）が認められず、
長時間の連続濾過が可能であることが分かる。これに対
し従来の濾過材による濾過は約24時間で既に除去率80％
以下に低下している。なお、原水濁度は4.5度、濾層高
さは350mm、濾過速度は50m/Hrで試験を行った。In addition, in the filtration with the filter material of the present invention, rise of turbidity leak (removal rate 90 to 80%) is not recognized until about 36 hours,
It turns out that continuous filtration for a long time is possible. On the other hand, filtration with the conventional filter media has already been achieved in about 24 hours with a removal rate of 80%.
It has dropped below. The test was performed at a raw water turbidity of 4.5 degrees, a filter layer height of 350 mm, and a filtration speed of 50 m / Hr.
試験例３ 本発明の濾過材の逆洗による膨張（展開）の試験を行
ったところ次の結果を得た。Test Example 3 A test was conducted on the expansion (development) of the filter material of the present invention by backwashing, and the following results were obtained.
試験条件 濾過材 サンプル２ 見掛け比重 0.7 成分Al2O3 31.0％ SiO2 48.1％ Fe2O3 1.6％ MgO 9.3％ 濾層高さ 350mm 上記条件の試験結果、第３図に示すような良好な逆洗
に膨張率が得られた（従来濾過材についての試験結果も
記載した）。すなわち、逆洗流速が30m/Hrで、膨張率は
18％（従来濾過材では５％）、40m/Hrで、膨張率は40％
（従来濾過材では８％）であった。Test conditions Filtration material Sample 2 Apparent specific gravity 0.7 component Al 2 O 3 31.0% SiO 2 48.1% Fe 2 O 3 1.6% MgO 9.3% Filter layer height 350mm Test result under the above conditions, good reverse as shown in Fig. 3 An expansion rate was obtained in the washing (test results for the conventional filter medium are also described). That is, the backwash flow rate is 30m / Hr, and the expansion rate is
18% (5% for conventional filter media), 40m / Hr, expansion rate 40%
(8% for the conventional filter material).
以上の各試験結果等から本発明の濾過材は下記の特性
を有することが確認できた。From the above test results and the like, it was confirmed that the filter material of the present invention had the following characteristics.
（イ）濾過性が良好 濾過材の有効径が比較的大きいが、均等係数が小さい
ため濾過速度が大きくとれる。しかも比表面積が大きい
ため、従来濾過のように濾層高さが厚くなくとも、多量
の濁質を抑留でき、かつ微細な濁質の除去も可能とな
る。(A) Good filterability Although the effective diameter of the filter medium is relatively large, the filtration rate can be increased because the uniformity coefficient is small. In addition, since the specific surface area is large, a large amount of turbid matter can be suppressed and fine turbid matter can be removed even if the height of the filter layer is not large as in conventional filtration.
（ロ）逆洗が優位 濾過材の見掛け比重が小さいため、逆洗水量に対する
濾過材の膨張率が大きい。よって逆洗時間や逆洗水量を
少なくすることができる。また、均等係数が小さいた
め、逆洗の繰返しによる濾過材の分級化が発生しない。
よって濾過、逆洗の繰返しによる濾過性能の変化は起こ
らない。(B) Backwashing is superior Since the apparent specific gravity of the filter medium is small, the expansion rate of the filter medium with respect to the amount of backwash water is large. Therefore, the backwash time and the amount of backwash water can be reduced. In addition, since the uniformity coefficient is small, classification of the filter medium due to repeated backwashing does not occur.
Therefore, there is no change in filtration performance due to repeated filtration and backwashing.
（ハ）寿命が長い 高温で焼結しているため、硬度が高く、摩減率が小さ
い。よって濾過、逆洗が繰返えされても、変形すること
がなく、半永久的に使用できる。(C) Long life Since sintered at high temperature, the hardness is high and the attrition rate is small. Therefore, even if filtration and backwashing are repeated, they can be used semi-permanently without deformation.
（ニ）復元率が良好 高温で焼結造粒しているため、濾過材の気孔は閉気孔
となる。このため微細な汚濁質は濾過材内部に捕捉され
ることがなく、比表面積が大きい表面に付着捕捉され
る。よって捕捉された汚濁質は逆洗によって容易に除去
でき、復元率が高い。(D) Good recovery rate Since the sintering and granulation are performed at a high temperature, the pores of the filter medium are closed pores. For this reason, the fine pollutants are not trapped inside the filter material, but are trapped and adhered to the surface having a large specific surface area. Therefore, the captured pollutants can be easily removed by backwashing, and the restoration rate is high.
（ホ）耐薬品性が良好 主成分がAl2O3/SiO2であるため、耐薬品性が大きい。
よって薬注処理（例えば次塩素酸ソーダ、硫酸バンド）
を行った液を濾過しても劣化変質することはない。(E) Good chemical resistance Since the main component is Al 2 O 3 / SiO 2 , the chemical resistance is high.
Therefore, chemical treatment (for example, sodium hypochlorite, sulfate band)
Even if the liquid subjected to the above is filtered, deterioration and deterioration do not occur.
以上から本発明によれば、見掛け比重が小さく、比表
面積が大きく、しかも摩減率が少ない濾過材を得ること
ができる。これにより汚濁濾過における除去率と処理能
力の向上、及び逆洗における復元率と効率の向上が図れ
る。この結果、コンパクトで経済的な濾過装置が実現で
きる。As described above, according to the present invention, it is possible to obtain a filter medium having a small apparent specific gravity, a large specific surface area, and a small attrition rate. As a result, the removal rate and the processing capacity in the pollution filtration can be improved, and the restoration rate and the efficiency in the backwash can be improved. As a result, a compact and economical filtration device can be realized.
第１図は本発明の濾過材の製造工程を示す工程ブロック
図、第２図は本発明の濾過材と従来の濾過材とによる汚
濁除去濾過比較試験結果を示す線図、第３図は本発明の
濾過材と従来濾過材の逆洗による膨張率の試験結果を示
す線図である。FIG. 1 is a process block diagram showing the manufacturing process of the filter medium of the present invention, FIG. 2 is a diagram showing the results of a comparison test of the contamination removal filtration using the filter medium of the present invention and the conventional filter medium, and FIG. It is a diagram showing the test result of the expansion coefficient by backwashing of the filter medium of the present invention and the conventional filter medium.
Claims (2)
を有し、粒径0.5〜1.0mm、見掛け比重0.6〜0.8、比表面
積1m2/g以上の物理特性を有することを特徴とするセラ
ミック濾過材。1. It has a physical property that contains 30% or more of Al 2 O 3 component, has a large number of pores, a particle size of 0.5 to 1.0 mm, an apparent specific gravity of 0.6 to 0.8, and a specific surface area of 1 m 2 / g or more. A ceramic filter material characterized by the following.
酸化アルミニュウム０〜５％、マグネサイトまたは海水
マグ仮焼物10〜25％、遊離珪砂を含まない水簸粘土20〜
30％を調合する工程と、該調合物に水を添加して上記調
合物を微粉砕した後フィルタープレスで脱水し混練した
後板状物に整形する工程と、該板状物を1380〜1410℃の
温度範囲で焼成する工程と、焼成した上記板状物を粉砕
し、篩分して粒度調整する工程とを有することを特徴と
するセラミック濾過材の製造方法。(2) 40-60% of kaolin containing no free silicic acid, 0-5% of aluminum hydroxide, 10-25% of magnesite or seawater mug calcined product, and 20-20% of elutriated clay containing no free silica sand.
30% blending, adding water to the blend, pulverizing the blend, dehydrating with a filter press, kneading the mixture, and shaping the plate into a plate-like product. A method for producing a ceramic filter material, comprising: a step of firing in a temperature range of ° C .; and a step of pulverizing the fired plate-like material and sieving to adjust the particle size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1135937A JP2787708B2 (en) | 1989-05-31 | 1989-05-31 | Ceramic filter medium and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1135937A JP2787708B2 (en) | 1989-05-31 | 1989-05-31 | Ceramic filter medium and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH034913A JPH034913A (en) | 1991-01-10 |
| JP2787708B2 true JP2787708B2 (en) | 1998-08-20 |
Family
ID=15163331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1135937A Expired - Lifetime JP2787708B2 (en) | 1989-05-31 | 1989-05-31 | Ceramic filter medium and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2787708B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101281569B1 (en) * | 2005-07-06 | 2013-07-03 | 야스오 시바사키 | Method for producing ceramic porous article |
| JP7316156B2 (en) * | 2019-09-02 | 2023-07-27 | 水ｉｎｇ株式会社 | Water purification method and water purification device |
-
1989
- 1989-05-31 JP JP1135937A patent/JP2787708B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH034913A (en) | 1991-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2142976C1 (en) | Abrasive material and method of preparing thereof | |
| EP0630677B1 (en) | Ceramic filter for a dust-containing gas and method for its production | |
| CA1238766A (en) | Process for the preparation of porous mullite | |
| US7309425B2 (en) | Apparatus for the preparation of arsenic free water | |
| JP5647359B2 (en) | Method for preparing α-alumina abrasive | |
| KR101226420B1 (en) | Abrasive Grain Based on Melted Spherical Corundum | |
| CN103013443A (en) | Alpha-alumina-based abrasive containing sheet-shaped structures, and preparation method thereof | |
| JP2639121B2 (en) | Method for producing fine α-alumina powder | |
| JPH0218309B2 (en) | ||
| CN110270432A (en) | A kind of method of non-calcareous dirt in removal carbide slag | |
| JP3280056B2 (en) | Sintered microcrystalline ceramic material and method for producing the same | |
| US6254822B1 (en) | Production of porous mullite bodies | |
| JP2787708B2 (en) | Ceramic filter medium and method for producing the same | |
| US3312558A (en) | Calcium hexaluminate articles | |
| CN101264402B (en) | Preparation of tripolite filtering screen | |
| CN1771300A (en) | Titanium dioxide scouring media and method of production | |
| CN1241833C (en) | Method of producing low soda alumina, low soda alumina produced by the method and method of producing porcelain | |
| CN113614050A (en) | Sintered alumina-zirconia balls | |
| JP2733860B2 (en) | Manufacturing method of wear-resistant silica media | |
| KR101481730B1 (en) | Grinding slurry and manufacturing method thereof, grinding stone and manufacturing method thereof | |
| JPH0717706A (en) | Production of quartz glass powder | |
| JP3436024B2 (en) | Continuous production method of alumina | |
| CN111744372B (en) | Porous ultrafiltration ceramic material, product containing material and preparation of product | |
| CN114133218A (en) | Ceramic filtering membrane with magnetization function and preparation method thereof | |
| JP2021087901A (en) | Method for producing purification agent for water treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090605 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term |