JP3692441B2 - Water purification device - Google Patents
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- JP3692441B2 JP3692441B2 JP29772998A JP29772998A JP3692441B2 JP 3692441 B2 JP3692441 B2 JP 3692441B2 JP 29772998 A JP29772998 A JP 29772998A JP 29772998 A JP29772998 A JP 29772998A JP 3692441 B2 JP3692441 B2 JP 3692441B2
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- water
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Description
【０００１】
【発明の属する技術分野】
この発明は、海獣、魚介類を飼育するための飼育水槽の水質浄化を行う水質浄化装置に関する。
【０００２】
【従来の技術】
水族館などの飼育水の水質浄化装置に必要な機能としては、▲１▼飼育生物の排泄物の除去、▲２▼残餌の除去、▲３▼溶存酸素の供給、▲４▼ＰＨ低下防止、▲５▼ＣＯ2 分圧低減、▲６▼ＮＨ4 −Ｎ濃度の上昇抑制、▲７▼細菌の増殖防止、▲８▼有機物分離・除去等が必要である。このような水質の浄化を行うために、泡沫分離槽内で被処理水中に多数の気泡を発生させ、これらの気泡に汚濁物質を付着させて除去する水質浄化装置が提案されている（特公平６−８８０１７号公報参照）。この装置では、インペラーを高速回転させて水の渦流を形成し、これにより生じる負圧を利用して空気を吸い込ませて気泡を発生させている。また、この水質浄化装置用の気液混合装置が、特公昭６２−１５２４９号公報、特公昭６３−２２１６７号公報、特公昭６２−３４４３６号公報、特公昭６２−３４４３８号公報などに開示されているが、いずれもインペラーを回転させて気泡を発生させる点で共通している。
【０００３】
【発明が解決しようとする課題】
上記従来の水質浄化装置は、一般に海水の飼育水に使用されるが、海水による腐食にキャビテーションエロージョンが加わるため、インペラーが損傷を受けやすく、したがって、インペラーを高価な耐食材料で製作しなければならないという問題があった。
【０００４】
この発明の目的は、インペラーを使用せずに済み、したがって、高価な耐食材料が不要となりかつメンテナンスも容易な水質浄化装置を提供することにある。
【０００５】
【課題を解決するための手段】
この発明による水質浄化装置は、泡沫分離槽と、泡沫分離槽の上流にて被処理水と気体とを混合して昇圧する気液混合器とを備えており、気液混合器から排出された気液混合物が泡沫分離槽に放出されることにより、泡沫分離槽内で被処理水中に多数の気泡を発生させ、これらの気泡に汚濁物質を付着させて除去する水質浄化装置において、泡沫分離槽内に、下端が泡沫分離槽の底壁より上にかつ上端が水面とほぼ同じ高さに位置している仕切り壁が設けられるとともに、下端が泡沫分離槽の底壁に固定されかつ上端が水面よりも低い位置にあり仕切り壁との間に浄化後の被処理水の通路を形成する補助仕切り壁が設けられており、仕切り壁と補助仕切り壁との間にフィルターが充填され、このフィルターの下方に曝気管が設けられ、曝気管に、気液混合器に気体を注入するコンプレッサーがバルブ付きの配管により接続されており、泡沫分離槽内に導入された被処理水は、曝気管からの気泡とともに仕切り壁と補助仕切り壁との間のフィルターを下から上に通過した後に排出されることを特徴とするものである。
【０００６】
気液混合器としては、エゼクターまたはスパージャーが使用される。
【０００７】
気液混合物が泡沫分離槽に放出されると、多数の微小気泡が生じ、被処理水中に含まれる汚濁物質は、これらの微小気泡に付着して泡沫分離槽内を上昇する。泡沫分離槽内を上昇して水面に達した気泡を取り除かれた後の被処理水は、上述した▲１▼から▲８▼までの機能を有する飼育水となり、これが水槽に戻されることにより、水槽内の水の汚濁が防止される。
【０００８】
上記装置は、泡沫分離槽の気液混合物入口上方に設けられかつ泡沫分離槽内を上昇して水面に達した汚濁物質付着気泡を対向方向に送るノズルと、仕切り壁の上端部に設けられて気泡を案内する屈曲部と、送られてきた汚濁物質付着気泡を回収する下部泡溜め槽と、これの上方に設けられた上部泡溜め槽とをさらに備えていることが好ましく、また、泡沫分離槽内の側壁上端部近くに気泡用越流堰が高さ調整自在に設けられており、越流堰を越えた気泡のほとんどは、下部泡溜め槽に入り、ここから汚濁物質を含んだスカムとして排出され、越流堰を越えた気泡の一部は、上部泡溜め槽に入り、ここから汚濁物質を含んだスカムとして排出されるようになされていることが好ましい。このようにすると、汚濁物質が付着した気泡を簡単な構成で確実に取り除くことができる。
【０００９】
【発明の実施の形態】
この発明の実施の形態を、以下図面を参照して説明する。以下の説明において、左右は、図の左右をいうものとする。
【００１０】
この発明の水質浄化装置は、被処理水中に多数の気泡を発生させてこれらの気泡に汚濁物質を付着させ、気泡を水から分離することにより水槽内の汚濁物質を除去するものであり、図１に示すように、水槽(1) 内の水の一部をポンプ(2) で吸引して循環させる主循環ライン(3) と、主循環ライン(3) 途中に設けられた濾過装置(4) と、主循環ライン(3) から分岐して水槽(1) 内の水の一部を抜き出す抜出し管(5) と、抜出し管(5) で抜き出された被処理水中に気体を混合して昇圧するエゼクター（気液混合器）(6) と、エゼクター(6) から排出された気液混合物が放出される泡沫分離槽(7) と、泡沫分離槽(7) の底部から浄化後の被処理水(13)を吸引するポンプ(8) と、吸引された浄化後の被処理水(13)を水槽(1) 内に戻す戻し管(9) とを備えている。
【００１１】
濾過装置(4) は、その底部から逆洗水が導入されて、その頂部から逆洗排水が排出されるようになされている。
【００１２】
抜出し管(5) により抜き出される被処理水は、主循環ライン(3) を流れる水の１０〜２５％程度とされる。
【００１３】
エゼクター(6) には、コンプレッサー(10)からの空気またはオゾンが流量調整弁(11)を介して導入され、抜出し管(5) 内の被処理水中に混合される。エゼクター(6) よりも下流の抜出し管(5) の部分は、気液混合物を送る混合管(5a)となり、その混合管(5a)の端部開口が泡沫分離槽(7) の右側壁の下寄りの部分に臨まされている。混合管(5a)の端部開口（気液混合物入口）より泡沫分離槽(7) 内に放出された気液混合物は、圧力が低下することにより多数の微小気泡(12)を生じ、生じた気泡(12)は水面に上昇して行く。被処理水に含まれる汚濁物質は、これらの気泡(12)に付着し、浄化後の被処理水(13)は、泡沫分離槽(7) の底部から抜き出されて水槽(1) に戻される。エゼクター(6) に代えて、これと同じように、被処理水中に気体を混合して昇圧する機能を有するスパージャーを用いてもよい。
【００１４】
泡沫分離槽(7) の右側壁上端部には、水面上に上昇した気泡(12)を左方（気液混合物入口の対向方向）に送る気泡押出し用の多孔管ノズル(14)が設けられている。多孔管ノズル(14)は、混合管(5a)に分岐管を介して接続されている。泡沫分離槽(7) の左右の中程には、仕切り壁(15)が設けられている。仕切り壁(15)の下端は、泡沫分離槽(7) の底壁より上に位置し、同上端は、水面とほぼ同じ高さに位置している。仕切り壁(15)の上端部には、左上がりの屈曲部(15a) が設けられており、この屈曲部(15a) の上面に沿って気泡(12)が左方に流れて行くようになされている。
【００１５】
泡沫分離槽(7) 内の左側壁の上端部近くに、鋸歯状の越流堰(16)が高さ調整自在に設けられている。この越流堰(16)を越えた気泡(12)のほとんどは、越流堰(16)の左下方に設けられた下部泡溜め槽(17)に入り、ここから汚濁物質を含んだスカムとして排出される。越流堰(16)を越えた気泡(12)の一部は、上方に移動し、この分は越流堰(16)の左上方に設けられた上部泡溜め槽(18)に入り、ここから汚濁物質を含んだスカムとして排出される。上部泡溜め槽(18)には、空気抜きのための管(18a) が設けられている。
【００１６】
泡沫分離槽(7) の仕切り壁(15)の左方に、仕切り壁(15)との間に浄化後の被処理水(13)の通路を形成する補助仕切り壁(19)が設けられている。補助仕切り壁(19)の下端は、泡沫分離槽(7) の底壁に固定され、同上端は、水面よりも低い位置にある。仕切り壁(15)と補助仕切り壁(19)との間に、フィルター(20)が充填されており、このフィルター(20)の下方に曝気管(21)が設けられている。曝気管(21)には、エゼクター(6) に気体を注入するコンプレッサー(10)がバルブ(23)付きの配管(22)により接続されている。
【００１７】
汚濁物質が気泡に付着して除去された浄化後の被処理水(13)は、曝気管(21)およびフィルター(20)を通過することにより、さらに浄化され、▲１▼飼育生物の排泄物の除去、▲２▼残餌の除去、▲３▼溶存酸素の供給、▲４▼ＰＨ低下防止、▲５▼ＣＯ2 分圧低減、▲６▼ＮＨ4 −Ｎ濃度の上昇抑制、▲７▼細菌の増殖防止、▲８▼有機物分離・除去の機能を有する飼育水となり、これが水槽(1) に戻されることにより、水槽(1) 内の飼育水の汚濁が防止される。
【００１８】
【発明の効果】
この発明の水質浄化装置によると、インペラーを使用せずに、上述した▲１▼から▲８▼までの機能が得られるので、高級材料が不要となりかつメンテナンスも容易なものとなる。
【図面の簡単な説明】
【図１】この発明による水質浄化装置を概略的に示す図である。
【符号の説明】
(1) 水槽
(5) 抜出し管
(6) エゼクターまたはスパージャー（気液混合器）
(7) 泡沫分離槽
(9) 戻し管
(10) コンプレッサー
(13) 被処理水
(14) 多孔管ノズル
(15) 仕切り壁
(15a) 屈曲部
(16) 越流堰
(17) 下部泡溜め槽
(18) 上部泡溜め槽
(19) 補助仕切り壁
(20) フィルター
(21) 曝気管
(22) 配管
(23) バルブ [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water purification apparatus for purifying water in a breeding aquarium for breeding sea animals and seafood.
[0002]
[Prior art]
Functions required for water purification equipment for breeding water such as aquariums include: (1) removal of excrement of breeding organisms, (2) removal of residual food, (3) supply of dissolved oxygen, (4) prevention of PH reduction, (5) Reduction of CO 2 partial pressure, (6) Suppression of increase in NH 4 -N concentration, (7) Prevention of bacterial growth, (8) Separation / removal of organic substances are necessary. In order to perform such water quality purification, a water quality purification apparatus has been proposed in which a large number of bubbles are generated in the water to be treated in a foam separation tank, and pollutants are attached to these bubbles for removal (see Japanese Patent Publication). 6-88017). In this apparatus, the impeller is rotated at a high speed to form a vortex of water, and air is sucked in using negative pressure generated thereby to generate bubbles. Gas-liquid mixing devices for this water purification device are disclosed in Japanese Patent Publication No. 6-15249, Japanese Patent Publication No. 63-22167, Japanese Patent Publication No. 62-34436, Japanese Patent Publication No. 62-34438, etc. However, both are common in that bubbles are generated by rotating the impeller.
[0003]
[Problems to be solved by the invention]
The above conventional water purification device is generally used for breeding water of seawater. However, since cavitation erosion is added to corrosion by seawater, the impeller is easily damaged, and therefore, the impeller must be made of an expensive corrosion-resistant material. There was a problem.
[0004]
An object of the present invention is to provide a water purification apparatus that does not require the use of an impeller, and thus eliminates the need for expensive corrosion-resistant materials and facilitates maintenance.
[0005]
[Means for Solving the Problems]
The water purification device according to the present invention includes a foam separation tank, and a gas-liquid mixer that mixes the water to be treated and gas upstream of the foam separation tank to increase the pressure, and is discharged from the gas-liquid mixer. In the water purification device that generates a large number of bubbles in the water to be treated in the foam separation tank by the gas-liquid mixture being released to the foam separation tank, and removes the pollutants by attaching these pollutants to the foam separation tank , the foam separation tank Inside, a partition wall having a lower end located above the bottom wall of the foam separation tank and an upper end located at substantially the same height as the water surface is provided, the lower end is fixed to the bottom wall of the foam separation tank, and the upper end is the water surface. There is an auxiliary partition wall that is located lower than the partition wall and forms a passage for treated water after purification, and a filter is filled between the partition wall and the auxiliary partition wall. An aeration tube is provided below the aeration tube A compressor for injecting gas into the gas-liquid mixer is connected by a pipe with a valve, and the water to be treated introduced into the foam separation tank is separated between the partition wall and the auxiliary partition wall along with the bubbles from the aeration pipe. The filter is discharged after passing through the filter from the bottom to the top .
[0006]
An ejector or a sparger is used as the gas-liquid mixer.
[0007]
When the gas-liquid mixture is discharged into the foam separation tank, a large number of microbubbles are generated, and the pollutant contained in the water to be treated adheres to these microbubbles and rises in the foam separation tank. The water to be treated after the bubbles that have reached the water surface after rising in the foam separation tank are removed becomes the breeding water having the functions (1) to (8) described above, and this is returned to the water tank. Water contamination in the tank is prevented.
[0008]
The apparatus is provided above the gas-liquid mixture inlet of the foam separation tank, and is provided at the upper end of the partition wall, and a nozzle that sends the pollutant-attached bubbles rising in the foam separation tank to the water surface in the opposite direction. It is preferable to further include a bent portion that guides the bubbles, a lower foam reservoir for collecting the pollutant bubbles that have been sent, and an upper foam reservoir provided above, and foam separation A bubble overflow weir is installed near the top of the side wall of the tank so that the height can be adjusted , and most of the bubbles that have passed through the overflow weir enter the lower bubble reservoir, where scum containing pollutants It is preferable that a part of the air bubbles that have been discharged as spilled over the overflow weir enter the upper foam reservoir and be discharged from there as scum containing pollutants . If it does in this way, the bubble to which a pollutant adhered can be certainly removed with simple composition.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right refer to the left and right in the figure.
[0010]
The water purification device of the present invention generates a large number of bubbles in the water to be treated, attaches pollutants to these bubbles, and removes the pollutants in the water tank by separating the bubbles from the water. As shown in Fig. 1, a main circulation line (3) for sucking and circulating a part of the water in the water tank (1) with a pump (2), and a filtration device (4 ) And a discharge pipe (5) that branches off from the main circulation line (3) to extract a part of the water in the water tank (1), and gas to be treated is extracted into the treated water extracted by the discharge pipe (5). Ejector (gas-liquid mixer) (6) that boosts pressure, foam separation tank (7) from which the gas-liquid mixture discharged from ejector (6) is released, and after purification from the bottom of foam separation tank (7) A pump (8) for sucking in the water to be treated (13) and a return pipe (9) for returning the purified water to be treated (13) to be returned to the water tank (1).
[0011]
The filtering device (4) is configured such that backwash water is introduced from the bottom thereof and backwash drainage is discharged from the top thereof.
[0012]
The treated water extracted by the extraction pipe (5) is about 10 to 25% of the water flowing through the main circulation line (3).
[0013]
Air or ozone from the compressor (10) is introduced into the ejector (6) through the flow rate adjusting valve (11) and mixed into the water to be treated in the extraction pipe (5). The part of the extraction pipe (5) downstream from the ejector (6) becomes a mixing pipe (5a) for sending the gas-liquid mixture, and the end opening of the mixing pipe (5a) is on the right side wall of the foam separation tank (7). It faces the lower part. The gas-liquid mixture discharged into the foam separation tank (7) from the end opening (gas-liquid mixture inlet) of the mixing tube (5a) produced a large number of microbubbles (12) due to the pressure drop. Bubbles (12) rise to the surface of the water. The pollutant contained in the treated water adheres to these bubbles (12), and the treated water (13) after purification is extracted from the bottom of the foam separation tank (7) and returned to the water tank (1). It is. Instead of the ejector (6), a sparger having a function of mixing and increasing the pressure of gas in the water to be treated may be used in the same manner.
[0014]
The upper end of the right side wall of the foam separation tank (7) is provided with a perforated tube nozzle (14) for extruding air bubbles that sends the air bubbles (12) rising above the water surface to the left (opposite direction of the gas-liquid mixture inlet). ing. The perforated pipe nozzle (14) is connected to the mixing pipe (5a) via a branch pipe. A partition wall (15) is provided in the middle of the left and right sides of the foam separation tank (7). The lower end of the partition wall (15) is located above the bottom wall of the foam separation tank (7), and the upper end is located at substantially the same height as the water surface. An upper left bent portion (15a) is provided at the upper end of the partition wall (15), and the bubble (12) flows to the left along the upper surface of the bent portion (15a). ing.
[0015]
Near the upper end of the left side wall in the foam separation tank (7), a sawtooth overflow overflow weir (16) is provided so as to be adjustable in height. Most of the bubbles (12) that passed over the overflow weir (16) entered the lower foam reservoir (17) provided on the lower left side of the overflow weir (16), and from there as scum containing pollutants Discharged. A part of the bubbles (12) beyond the overflow weir (16) moves upward, and this part enters the upper bubble reservoir (18) provided at the upper left of the overflow weir (16). Is discharged as scum containing pollutants. The upper foam reservoir (18) is provided with a pipe (18a) for venting air.
[0016]
On the left side of the partition wall (15) of the foam separation tank (7), there is an auxiliary partition wall (19) that forms a passage for the treated water (13) after purification with the partition wall (15). Yes. The lower end of the auxiliary partition wall (19) is fixed to the bottom wall of the foam separation tank (7), and the upper end is at a position lower than the water surface. A filter (20) is filled between the partition wall (15) and the auxiliary partition wall (19), and an aeration pipe (21) is provided below the filter (20). A compressor (10) for injecting gas into the ejector (6) is connected to the aeration pipe (21) by a pipe (22) with a valve (23).
[0017]
The treated water (13) after purification, in which the pollutants are removed by adhering to the bubbles, is further purified by passing through the aeration tube (21) and the filter (20). Removal, (2) removal of residual feed, (3) supply of dissolved oxygen, (4) prevention of PH decrease, (5) reduction of CO 2 partial pressure, (6) suppression of increase in NH 4 -N concentration, (7) The breeding water has the function of preventing the growth of bacteria and the separation and removal of organic matter, and is returned to the tank (1), thereby preventing the breeding water in the tank (1) from being contaminated.
[0018]
【The invention's effect】
According to the water purification apparatus of the present invention, since the functions (1) to (8) described above can be obtained without using an impeller, high-quality materials are not required and maintenance is easy.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a water purification apparatus according to the present invention.
[Explanation of symbols]
(1) Aquarium
(5) Extraction pipe
(6) Ejector or sparger (gas-liquid mixer)
(7) Foam separation tank
(9) Return pipe
(10) Compressor
(13) treated water
(14) Perforated tube nozzle
(15) Partition wall
(15a) Bend
(16) Overflow weir
(17) Lower foam tank
(18) Upper foam reservoir
(19) Auxiliary partition wall
(20) Filter
(21) Aeration tube
(22) Piping
(23) Valve
Claims (3)
泡沫分離槽 (7) 内に、下端が泡沫分離槽 (7) の底壁より上にかつ上端が水面とほぼ同じ高さに位置している仕切り壁 (15) が設けられるとともに、下端が泡沫分離槽 (7) の底壁に固定されかつ上端が水面よりも低い位置にあり仕切り壁 (15) との間に浄化後の被処理水 (13) の通路を形成する補助仕切り壁 (19) が設けられており、仕切り壁 (15) と補助仕切り壁 (19) との間にフィルター (20) が充填され、このフィルター (20) の下方に曝気管 (21) が設けられ、曝気管 (21) に、気液混合器 (6) に気体を注入するコンプレッサー (10) がバルブ (23) 付きの配管 (22) により接続されており、泡沫分離槽 (7) 内に導入された被処理水は、曝気管 (21) からの気泡とともに仕切り壁 (15) と補助仕切り壁 (19) との間のフィルター (20) を下から上に通過した後に排出されることを特徴とする水質浄化装置。A foam separation tank (7), and a gas-liquid mixer (6) for mixing and increasing the pressure of water to be treated and gas upstream of the foam separation tank (7). When the gas-liquid mixture discharged from the container is discharged into the foam separation tank (7), a large number of bubbles are generated in the water to be treated in the foam separation tank (7), and contaminants adhere to these bubbles. In the water purification device to be removed,
In the foam separation tank (7) , there is provided a partition wall (15) whose lower end is above the bottom wall of the foam separation tank (7) and whose upper end is located at substantially the same height as the water surface, and the lower end is foam. Auxiliary partition wall (19) which is fixed to the bottom wall of the separation tank (7) and whose upper end is lower than the water surface and forms a passage for treated water (13) after purification between the partition wall (15 ) The filter (20) is filled between the partition wall (15) and the auxiliary partition wall (19), and the aeration pipe (21) is provided below the filter (20) , and the aeration pipe ( 21) , a compressor (10) for injecting gas into the gas- liquid mixer (6) is connected by a pipe (22) with a valve (23) , and the object to be treated introduced into the foam separation tank (7) Water purification is characterized in that water is discharged after passing through the filter (20) between the partition wall (15) and the auxiliary partition wall (19) together with bubbles from the aeration pipe (21) from the bottom to the top. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29772998A JP3692441B2 (en) | 1998-10-20 | 1998-10-20 | Water purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29772998A JP3692441B2 (en) | 1998-10-20 | 1998-10-20 | Water purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000117243A JP2000117243A (en) | 2000-04-25 |
| JP3692441B2 true JP3692441B2 (en) | 2005-09-07 |
Family
ID=17850427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29772998A Expired - Fee Related JP3692441B2 (en) | 1998-10-20 | 1998-10-20 | Water purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3692441B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022149989A1 (en) * | 2021-01-11 | 2022-07-14 | Redox As | A separation unit for a protein skimmer |
-
1998
- 1998-10-20 JP JP29772998A patent/JP3692441B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022149989A1 (en) * | 2021-01-11 | 2022-07-14 | Redox As | A separation unit for a protein skimmer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000117243A (en) | 2000-04-25 |
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