JP3035308B2 - How to backwash ceramic filters - Google Patents
How to backwash ceramic filtersInfo
- Publication number
- JP3035308B2 JP3035308B2 JP1173568A JP17356889A JP3035308B2 JP 3035308 B2 JP3035308 B2 JP 3035308B2 JP 1173568 A JP1173568 A JP 1173568A JP 17356889 A JP17356889 A JP 17356889A JP 3035308 B2 JP3035308 B2 JP 3035308B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- ceramic filter
- backwashing
- pressure
- stock solution
- 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 - Fee Related
Links
- 239000000919 ceramic Substances 0.000 title claims description 26
- 238000011001 backwashing Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 16
- 239000011550 stock solution Substances 0.000 claims description 16
- 239000000706 filtrate Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 description 21
- 235000020681 well water Nutrition 0.000 description 17
- 239000002349 well water Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 235000020188 drinking water Nutrition 0.000 description 3
- 239000003651 drinking water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はセラミックフィルタの逆洗方法に関する。The present invention relates to a method for backwashing a ceramic filter.
フィルタ容器内部に設けられた管状のセラミックフィ
ルタを逆洗する方法としては、従来、フィルタ容器にピ
ストンを内蔵したシリンダを取付け、流体圧をピストン
に加えることによりフィルタ容器内のろ液に原液よりも
大きい圧力をかけ、かつろ過流速よりも速い流速でろ液
を押し入れ、開閉弁を閉じて逆洗した後、単位時間当り
のシリンダ内の容積変化が単位時間当りのろ過量よりも
小さくなるようにピストンを戻す方法が提案されている
（特開昭63−51913号公報）。Conventionally, as a method of backwashing a tubular ceramic filter provided inside a filter container, a cylinder having a built-in piston is attached to the filter container, and a fluid pressure is applied to the piston so that the filtrate in the filter container is less than the original liquid. After applying a large pressure and pushing in the filtrate at a flow rate higher than the filtration flow rate, closing the on-off valve and backwashing, the piston so that the volume change in the cylinder per unit time is smaller than the filtration amount per unit time. Has been proposed (JP-A-63-51913).
しかし、この方法では、フィルタ容器にピストンを内
蔵したシリンダなどの設備を取付ける必要があるため、
装置構成が複雑になり、装置コストも上昇する。また、
この方法では、逆洗を繰返すと逆洗の効果が徐々に小さ
くなることが多かった。特に、セラミックフィルタ本体
に原液流路が多数設けられているような複雑な形状のセ
ラミックフィルタでは効果的に逆洗することが困難であ
った。However, in this method, it is necessary to install equipment such as a cylinder with a built-in piston in the filter container,
The device configuration becomes complicated, and the device cost also increases. Also,
In this method, when the backwashing is repeated, the effect of the backwashing often decreases gradually. In particular, it has been difficult to effectively backwash a ceramic filter having a complicated shape in which a large number of stock solution channels are provided in the ceramic filter body.
本発明は前記問題点を解決するためになされたもので
あり、簡単な装置構成で、長期にわたって良好な逆洗効
果を維持することができるセラミックフィルターの逆洗
方法を提供することを目的とする。The present invention has been made to solve the above problems, and has an object to provide a method of backwashing a ceramic filter which can maintain a good backwashing effect over a long period of time with a simple device configuration. .
本発明のセラミックフィルターの逆洗方法は、フィル
タ容器内部に設けられた管状のセラミックフィルタを逆
洗するにあたり、原液出口及びろ過液出口に設けられた
開閉弁を閉じた状態で原液をセラミックフィルタ内へ圧
入してセラミックフィルタ内の原液の圧力を上昇させた
後、前記原液出口の開閉弁を瞬時に開放することを特徴
とするものである。In the method for backwashing a ceramic filter according to the present invention, when the tubular ceramic filter provided inside the filter container is backwashed, the undiluted solution is passed through the ceramic filter while the on-off valves provided at the undiluted solution outlet and the filtrate outlet are closed. Then, after the pressure of the stock solution in the ceramic filter is increased by press-fitting, the on-off valve at the stock solution outlet is instantaneously opened.
本発明方法では、原液出口及びろ過液出口に設けられ
た開閉弁を閉じた状態で原液をセラミックフィルタ内へ
圧入してセラミックフィルタ内の原液の圧力を上昇させ
ることにより、フィルタ本体の微細孔内部やフィルタ外
部のろ過液側の圧力も上昇する。その後、原液出口の開
閉弁を瞬時に開放すると、フィルタの原液側の圧力が瞬
時に低下するので、フィルタに目詰まりした物質がろ過
液側から原液側へ押し出される。本発明方法の場合、ろ
過面の全面にわたってこのような作用を及ぼすことがで
きるので、従来の方法よりも良好な逆洗効果を長期にわ
たって得ることができる。特に、フィルタ形状が複雑な
場合には、従来の方法に比べて逆洗効果が非常に良好と
なる。また、逆洗を行うための特別の設備を設ける必要
がなく、装置構成が簡単で装置コストも安価である。In the method of the present invention, the undiluted solution is pressed into the ceramic filter while the on-off valves provided at the undiluted solution outlet and the filtrate outlet are closed to increase the pressure of the undiluted solution in the ceramic filter, so that the inside of the fine hole of the filter body is And the pressure on the filtrate side outside the filter also increases. Thereafter, when the on-off valve at the stock solution outlet is instantaneously opened, the pressure on the stock solution side of the filter is instantaneously reduced, so that the material clogged in the filter is pushed out from the filtrate side to the stock solution side. In the case of the method of the present invention, since such an effect can be exerted over the entire surface of the filtration surface, a better backwashing effect than the conventional method can be obtained for a long time. In particular, when the shape of the filter is complicated, the backwashing effect is very good as compared with the conventional method. In addition, there is no need to provide any special equipment for performing backwashing, and the apparatus configuration is simple and the apparatus cost is low.
以下、本発明の実施例を図面を参照して説明する。な
お、本実施例では、本発明の逆洗方法を井戸水をろ過し
て飲料水を供給する場合に適用した例について説明す
る。Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, an example will be described in which the backwash method of the present invention is applied to a case where well water is filtered to supply drinking water.
第１図は井戸水のろ過装置の構成図である。第１図に
おいて、井戸１からポンプ２により汲み上げられた井戸
水は貯水槽３に入れられる。貯水槽３内の井戸水はポン
プ４によりフィルタ容器５内に設けられたセラミックフ
ィルタ６内部を通過して開閉弁７を介して貯水槽３へ循
環する。また、セラミックフィルタ６によりろ過された
ろ過液は開閉弁８を介してろ過液タンク９に収容され
る。このろ過液タンク９から飲料水配管系を通して飲料
水が供給される。FIG. 1 is a configuration diagram of a filtration device for well water. In FIG. 1, well water pumped from a well 1 by a pump 2 is put into a water storage tank 3. The well water in the water storage tank 3 is circulated to the water storage tank 3 via the on-off valve 7 through the inside of the ceramic filter 6 provided in the filter container 5 by the pump 4. The filtrate filtered by the ceramic filter 6 is stored in a filtrate tank 9 via an on-off valve 8. Drinking water is supplied from the filtrate tank 9 through a drinking water piping system.
前記ポンプ２の圧力は3.5kg/cm2であり、井戸水は60
/minの流量で汲み上げられる。前記セラミックフィル
ター６としては、ロ過面の気孔径が約0.2μｍのものを
用いた。なお、気孔径が0.2〜0.8μｍのセラミックフィ
ルタを用いることにより、菌体及び濁度に影響する不純
物を除去することができる。The pressure of the pump 2 is 3.5 kg / cm 2 and the well water is 60 kg / cm 2.
Pumped at a flow rate of / min. As the ceramic filter 6, a filter having a pore diameter of about 0.2 μm on a filtration surface was used. In addition, by using a ceramic filter having a pore size of 0.2 to 0.8 μm, it is possible to remove bacteria and impurities affecting turbidity.
このろ過装置の逆洗は、ろ過の途中でセラミックフィ
ルタ６からの井戸水の出口側及びろ過液出口に設けられ
た開閉弁７、８を閉じた状態でポンプ４によりセラミッ
クフィルタ６内へ井戸水を圧入してセラミックフィルタ
６内の井戸水の圧力を上昇させた後、井戸水の出口側の
開閉弁７を瞬時に開放することにより行われる。In the backwashing of the filtration device, the well water is pressed into the ceramic filter 6 by the pump 4 with the on-off valves 7 and 8 provided on the outlet side of the well water from the ceramic filter 6 and the filtrate outlet closed during the filtration. After the pressure of the well water in the ceramic filter 6 is increased, the opening / closing valve 7 on the outlet side of the well water is instantaneously opened.
このろ過装置について、本発明の逆洗方法を適用した
場合の井戸水の圧力の変化及びろ過流量を第２図に示
す。第２図に示されるように、ろ過を継続すると目詰ま
りが生じるため、井戸水の圧力（第２図中△で表示）は
初期の1.8kg/cm2から3.2kg/cm2に上昇し、ろ過流量（第
２図中○で表示）は初期の68/minから35/minへと減
少する。次に、２つの開閉弁７、８を閉じると、井戸水
の圧力は約4kg/cm2まで上昇する。次いで、井戸水の出
口側の開閉弁７を瞬時に開放すると、逆洗が行われ、井
戸水の圧力は約2.5kg/cm2まで低下し、ろ過流量は初期
値に近い約60/minまで回復する。以後、ろ過を継続す
ると、井戸水の圧力は3kg/cm2前後まで上昇し、ろ過流
量は約50/minまで低下するが、そのたびに逆洗を行う
ごとに、井戸水の圧力は約2.5kg/cm2まで低下し、ろ過
流量は初期値に近い約60/minまで回復する。FIG. 2 shows a change in well water pressure and a filtration flow rate when the backwash method of the present invention is applied to this filtration device. As shown in Fig. 2, clogging occurs when filtration is continued, so the well water pressure (indicated by △ in Fig. 2) increases from the initial 1.8 kg / cm 2 to 3.2 kg / cm 2 , The flow rate (indicated by a circle in FIG. 2) decreases from the initial 68 / min to 35 / min. Next, when the two on-off valves 7 and 8 are closed, the pressure of the well water increases to about 4 kg / cm 2 . Then, when the on-off valve 7 on the outlet side of the well water is instantaneously opened, backwashing is performed, the pressure of the well water decreases to about 2.5 kg / cm 2 , and the filtration flow rate recovers to about 60 / min, which is close to the initial value. . Thereafter, if the filtration is continued, the well water pressure rises to about 3 kg / cm 2 and the filtration flow rate decreases to about 50 / min, but each time the backwash is performed, the well water pressure increases to about 2.5 kg / cm2. cm 2 and the filtration flow recovers to about 60 / min, close to the initial value.
一方、フィルタ容器にピストンを内蔵したシリンダを
取付けて従来の逆洗方法を適用した場合（比較例）、ろ
過流量（第２図中＊で表示）は、ろ過の継続に伴って初
期の68/minから減少し、そのたびに逆洗を繰り返すご
とにろ過流量は回復するものの、そのときのろ過流量の
値は徐々に下がってくる。On the other hand, when the conventional backwashing method is applied by attaching a cylinder with a built-in piston to the filter container (comparative example), the filtration flow rate (indicated by * in FIG. 2) is reduced by the initial The filtration flow rate is reduced from min and the filtration flow rate is restored each time the backwashing is repeated, but the value of the filtration flow rate at that time gradually decreases.
以上詳述したように本発明の逆洗方法によれば、原液
出口及びろ過液出口に設けられた開閉弁を閉じた状態で
原液をセラミックフィルタ内へ圧入してセラミックフィ
ルタ内の原液の圧力を上昇させることにより、フィルタ
本体の微細孔内部やフィルタ外部のろ過液側の圧力も上
昇する。その後、原液出口の開閉弁を瞬時に開放する
と、フィルタの原液側の圧力が瞬時に低下するので、フ
ィルタに目詰まりした物質がろ過液側から原液側へ押し
出される。本発明方法の場合、ろ過面の全面にわたって
このような作用を及ぼすことができるので、従来の方法
よりも良好な逆洗効果を長期にわたって得ることができ
る。また、逆洗を行うための特別の設備を設ける必要が
なく、装置構成が簡単で装置コストも安価である。As described in detail above, according to the backwashing method of the present invention, the stock solution is press-fitted into the ceramic filter while the on-off valves provided at the stock solution outlet and the filtrate outlet are closed to reduce the pressure of the stock solution in the ceramic filter. By increasing the pressure, the pressure inside the micropores of the filter body and on the filtrate side outside the filter also increases. Thereafter, when the on-off valve at the stock solution outlet is instantaneously opened, the pressure on the stock solution side of the filter is instantaneously reduced, so that the material clogged in the filter is pushed out from the filtrate side to the stock solution side. In the case of the method of the present invention, since such an effect can be exerted over the entire surface of the filtration surface, a better backwashing effect than the conventional method can be obtained for a long time. In addition, there is no need to provide any special equipment for performing backwashing, and the apparatus configuration is simple and the apparatus cost is low.
第１図は本発明の実施例において使用されたろ過装置の
構成図、第２図は本発明の逆洗方法及び従来の逆洗方法
を適用した場合のろ過流量及び井戸水の圧力の経時変化
を示す特性図である。 １……井戸、２……ポンプ、３……貯水槽、４……ポン
プ、５……フィルタ容器、６……セラミックフィルタ、
７、８……開閉弁、９……ろ過液タンク。FIG. 1 is a configuration diagram of a filtration device used in an embodiment of the present invention, and FIG. 2 shows a temporal change of a filtration flow rate and a well water pressure when the backwashing method of the present invention and a conventional backwashing method are applied. FIG. 1 ... well 2 ... pump 3 ... water tank 4 ... pump 5 ... filter container 6 ... ceramic filter
7, 8: On-off valve, 9: Filtrate tank.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 水谷 省吾 愛知県刈谷市小垣江町南藤１番地 東芝 セラミックス株式会社刈谷製造所内 (72)発明者 江口 忠男 愛知県刈谷市小垣江町南藤１番地 東芝 セラミックス株式会社刈谷製造所内 (72)発明者 南 俊郎 愛知県刈谷市小垣江町南藤１番地 東芝 セラミックス株式会社刈谷製造所内 (72)発明者 長谷川 満雅 愛知県刈谷市小垣江町南藤１番地 東芝 セラミックス株式会社刈谷製造所内 (56)参考文献 特開 昭60−197206（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 29/62 - 29/74 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shogo Mizutani 1st Minamifuji, Ogakie-cho, Kariya-shi, Aichi Pref. Toshiba Ceramics Co., Ltd. Inside the Kariya Works (72) Inventor Toshiro Minami 1st Minamito, Ogakie-cho, Kariya-shi, Aichi Prefecture Toshiba Ceramics Co., Ltd. 56) References JP-A-60-197206 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B01D 29/62-29/74
Claims (1)
ミックフィルタを逆洗するにあたり、原液出口及びろ過
液出口に設けられた開閉弁を閉じた状態で原液をセラミ
ックフィルタ内へ圧入してセラミックフィルタ内の原液
の圧力を上昇させた後、前記原液出口の開閉弁を瞬時に
開放することを特徴とするセラミックフィルタの逆洗方
法。When a tubular ceramic filter provided inside a filter container is backwashed, a stock solution is pressed into the ceramic filter with an on-off valve provided at a stock solution outlet and a filtrate solution closed. A method for backwashing a ceramic filter, comprising: immediately opening an on-off valve at the stock solution outlet after increasing the pressure of the stock solution in the ceramic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173568A JP3035308B2 (en) | 1989-07-05 | 1989-07-05 | How to backwash ceramic filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1173568A JP3035308B2 (en) | 1989-07-05 | 1989-07-05 | How to backwash ceramic filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0338206A JPH0338206A (en) | 1991-02-19 |
| JP3035308B2 true JP3035308B2 (en) | 2000-04-24 |
Family
ID=15962972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1173568A Expired - Fee Related JP3035308B2 (en) | 1989-07-05 | 1989-07-05 | How to backwash ceramic filters |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3035308B2 (en) |
-
1989
- 1989-07-05 JP JP1173568A patent/JP3035308B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0338206A (en) | 1991-02-19 |
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