JP3277333B2 - Method and apparatus for improving water quality of a water area having upper and lower stratification - Google Patents
Method and apparatus for improving water quality of a water area having upper and lower stratificationInfo
- Publication number
- JP3277333B2 JP3277333B2 JP14220692A JP14220692A JP3277333B2 JP 3277333 B2 JP3277333 B2 JP 3277333B2 JP 14220692 A JP14220692 A JP 14220692A JP 14220692 A JP14220692 A JP 14220692A JP 3277333 B2 JP3277333 B2 JP 3277333B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- air
- pumping cylinder
- stratification
- pumping
- 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.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、表層と低層の上下２
層に分れた水域（例えば汽水湖）の水質改善を目的とし
た上下成層を有する水域の水質改善方法及び装置に関す
る。BACKGROUND OF THE INVENTION The present invention relates to an upper and lower surface layer and a lower layer.
The present invention relates to a method and an apparatus for improving water quality of a water area having upper and lower stratification for the purpose of improving the water quality of a water area (for example, a brackish lake) divided into layers.
【０００２】[0002]
【従来の技術】従来、上下２層に分れた水域の水質改善
については、特許出願人によって既に提案された２段揚
水装置を用いる上下循環対流する技術が知られていた
（特公平１−２６７６０号、特公平３−７４４０号）。2. Description of the Related Art Conventionally, in order to improve the water quality of a water area divided into upper and lower layers, there has been known a vertically circulating convection technique using a two-stage pumping apparatus which has already been proposed by the applicant of the present invention (Japanese Patent Publication No. Hei. 26760, Tokuhei 3-7440).
【０００３】従来汽水湖においては、上成層が淡水で下
成層が塩水であって、上下二段の成層が形成されてい
る。このような場合に、水域全体を上下に循環対流させ
ると、淡水と塩水が混合して魚類の生息に不向きとなる
ことが知られていた。そこで、従来多用されている一段
式揚水筒は使用でない。Conventionally, in a brackish lake, the upper stratum is made of freshwater and the lower stratum is made of salt water, and two upper and lower stratifications are formed. In such a case, it has been known that, when circulating convection up and down the entire water area, freshwater and saltwater are mixed and unsuitable for fish inhabitation. Therefore, a single-stage pumping cylinder, which has been widely used, is not used.
【０００４】また、湖沼およびダム等においては、夏季
に、表成層と、深成層とを分割する水温躍層が生じるこ
とが知られていた。このような場合においても、全体を
循環対流させると水温が平均化され、農業用水温として
必要な水温（例えば１７℃以上）以下になるおそれがあ
った。そこで表成層（上成層）と深成層（下成層）の水
質を別々に改善しようとしたものである。It has been known that, in lakes, marshes, dams, and the like, a thermocline that separates a superficial layer from a deep layer in summer. Even in such a case, when the whole is circulated and convected, the water temperature is averaged, and there is a possibility that the water temperature may become lower than the water temperature required for agricultural use (for example, 17 ° C. or higher). Therefore, the water quality of the surface stratification (upper stratification) and deep stratification (lower stratification) was separately improved.
【０００５】[0005]
【発明により解決すべき課題】前記従来の２段揚水装置
には、色々の構造が提案され、下部揚水筒で使用した空
気を上部揚水筒で用いる方式、下部揚水筒内に散気手段
を配置した技術もある。Various structures have been proposed for the conventional two-stage pumping apparatus, in which air used in the lower pumping cylinder is used in the upper pumping cylinder, and a diffuser is provided in the lower pumping cylinder. Some technologies have been developed.
【０００６】然し乍ら、前記従来の技術においては、下
成層（低成層）の溶存酸素量を改善することが困難であ
った。However, in the above-mentioned conventional technique, it was difficult to improve the dissolved oxygen content of the lower stratification (low stratification).
【０００７】特に水底部では有機物が浮游、又は沈澱し
ている場合に、水中に含まれた酸素は、前記有機物の分
解に多量消費され、遂には酸欠を生じて魚類の生息を不
可能にするのみならず、有機物の嫌気性分解によって有
害ガスを生成し、更に悪臭を発するなどの問題点があっ
た。そこで、前記従来の２段揚水装置により多大の効果
を期待したのであるが、下層の酸素消費量が多い時に
は、気泡彈又は揚水筒内の散気だけの循環対流では十分
の効果を期待できない問題点があった。In particular, when organic matter floats or precipitates at the bottom of the water, oxygen contained in the water is consumed in large amounts in the decomposition of the organic matter, and eventually causes oxygen deficiency, making fish inhabitable. In addition to this, there is a problem that harmful gas is generated by anaerobic decomposition of organic substances, and further, a bad smell is generated. Therefore, a great effect was expected by the conventional two-stage pumping apparatus. However, when the oxygen consumption of the lower layer is large, a sufficient effect cannot be expected by circulating convection using only bubble bubbles or air diffusion in the pumping cylinder. There was a point.
【０００８】然して上成層は、溶存酸素量の多い水面付
近（殆んど飽和状態にあり）の水を巻き込むので、上成
層全域の溶存酸素量を急速に改善できるが、下成層は下
部空気室からの気泡彈から溶け込む酸素のみが循環溶入
する為に、酸素の絶対量が著しく不足する問題点があっ
た。Since the upper stratification involves water near the surface of the dissolved oxygen (which is almost saturated), the amount of dissolved oxygen in the entire upper stratification can be rapidly improved. However, there is a problem that the absolute amount of oxygen is remarkably insufficient because only the oxygen that dissolves from the bubble bubbles is circulated.
【０００９】[0009]
【課題を解決するための手段】然るにこの発明は、散気
手段を用いて、下成層の溶存酸素量の改善を計り、前記
従来の問題点を解決したのである。The present invention solves the above-mentioned conventional problems by using a diffuser to improve the amount of dissolved oxygen in the underlayer.
【００１０】即ち方法の発明は、上下成層毎に夫々対応
する上下二段の揚水筒からの気泡彈により各成層を対流
循環させる方法において、上成層は水面付近の酸素量の
多い水を巻き込んで溶存酸素量の改善を図り、下成層は
下段揚水筒の外側下部に微細気泡を発生させて緩徐な上
昇流を生起し、前記微細気泡中の酸素を溶解させて溶存
酸素量の改善を図り、前記微細気泡を含んだ水を下成層
の上層部において放射状に拡散させることを特徴とした
上下成層を有する水域の水質改善方法である。また他の
発明は、微細気泡は、下段揚水筒の外側で、環状に生成
させるようにしたものであり、下部揚水筒の上部付近に
おいて、気泡彈は逆円錐状に放出させることを特徴とし
たものである。次に装置の発明は、上部揚水筒の下部に
下部揚水筒の上部を連設すると共に、夫々の揚水筒の下
部に空気室を設け、前記上下部の揚水筒によって上成層
と下成層の夫々において、上下循環対流を生起するよう
にした揚水装置において、上部揚水筒の空気室の外筒底
部へ、下部揚水筒の放出空気流入孔を設けると共に、前
記上部空気室の下部周縁へ集気傘を連設し、前記下部揚
水筒の空気室の外側へ、散気手段を配置したことを特徴
とする上下成層を有する水域の水質改善装置である。更
に下部揚水筒の上部には、逆円錐状の空気彈通路を設け
たものであり、散気手段は、中空環体又は中空盤体の上
面に微小散気孔を穿設し、前記中空環体又は中空盤体に
加圧空気の給送ホースを連結したものである。That is, the invention of the method is a method of convectively circulating each stratification by bubbles from upper and lower two-stage pumping cylinders respectively corresponding to the upper and lower stratifications, wherein the upper stratification involves water containing a large amount of oxygen near the water surface. In order to improve the dissolved oxygen amount, the lower stratification generates fine bubbles in the lower outside of the lower pumping cylinder to generate a slow upward flow, and dissolves the oxygen in the fine bubbles to improve the dissolved oxygen amount, A method for improving the water quality of a water body having upper and lower stratifications, characterized by radially diffusing the water containing the microbubbles in the upper layer of the lower stratification. Still another invention is characterized in that the fine bubbles are generated in an annular shape outside the lower pumping cylinder, and near the upper part of the lower pumping cylinder, the bubbles are discharged in an inverted conical shape. Things. Next, the invention of the device is such that the upper part of the lower pumping cylinder is connected to the lower part of the upper pumping cylinder, the air chamber is provided at the lower part of each pumping cylinder, and the upper stratification and the lower stratification are respectively performed by the upper and lower pumping cylinders. In the pumping apparatus configured to generate vertical circulation convection, a discharge air inflow hole of a lower pumping cylinder is provided at a bottom of an outer cylinder of an air chamber of an upper pumping cylinder, and an air collecting umbrella is provided at a lower periphery of the upper air chamber. And a diffuser is disposed outside the air chamber of the lower pumping cylinder. In addition, an inverted conical air passage is provided at the upper part of the lower water pumping cylinder, and the air diffusing means is provided with a small air diffusing hole on the upper surface of the hollow ring or the hollow disk, and the hollow ring is formed. Alternatively, a feed hose for pressurized air is connected to the hollow disk.
【００１１】前記において、下部揚水筒の上部へ、気泡
彈の逆円錐通路を用いたが、通常の円筒体でもよいこと
は勿論である。前記逆円錐通路の場合には、下成層が比
較的薄い場合（例えば厚さ１ｍ〜３ｍ）でも気泡彈の成
形を図り、所定の揚水能力を保有させることができる。In the above description, an inverted conical passage made of foam is used above the lower pumping cylinder, but it is a matter of course that a normal cylindrical body may be used. In the case of the inverted conical passage, even when the underlying layer is relatively thin (for example, a thickness of 1 m to 3 m), it is possible to form the foam and maintain a predetermined pumping capacity.
【００１２】即ち空気室から放出された空気が一つの気
泡彈にならなければ、揚水能力が小さいので、気泡彈を
１つにまとめなければならない。然し乍ら気泡彈を１つ
にまとめるには、揚水筒の直径と長さとの間に一定の関
係がある。例えば直径２０ｃｍの揚水筒の場合に、順次
放出された空気が１つの気泡彈としたまとまるには筒長
は少くとも１ｍの長さを要する。一方揚水量は、流速と
揚水筒の直径により定まる。そこで下成層が薄い場合
（例えば１．５ｍ）には、揚水筒の直径を小さく（例え
ば直径１５ｃｍ）しなければならないから、必然的に揚
水量が少なくなる。然し乍ら逆円錐形の揚水筒を用いる
場合には、間隙幅が揚水筒の直進に相当するのみなら
ず、間隙が斜に形成されているので必然的に気泡彈の通
路が円筒の場合よりも長くなる。従って一般的に逆円錐
揚水筒の方が下成層の薄い場合に有効ということができ
る。That is, if the air released from the air chamber does not form one bubble, the water pumping ability is small, and the bubbles must be combined into one. However, there is a certain relationship between the diameter and the length of the pumping cylinder in order to combine the bubbles. For example, in the case of a pumping cylinder having a diameter of 20 cm, the length of the cylinder needs to be at least 1 m in order for the sequentially released air to be combined into one bubble. On the other hand, the pumping amount is determined by the flow velocity and the diameter of the pumping cylinder. Therefore, when the underlayer is thin (for example, 1.5 m), the diameter of the pumping cylinder must be reduced (for example, 15 cm in diameter), so that the pumping amount is inevitably reduced. However, when using an inverted conical pumping cylinder, the gap width not only corresponds to the straight traveling of the pumping cylinder, but also because the gap is formed obliquely, the passage of the bubble is necessarily longer than in the case of a cylinder. Become. Therefore, it can be generally said that the inverted conical pumping cylinder is more effective when the lower stratum is thin.
【００１３】また、前記揚水筒は何れも一本であるけれ
ども、揚水筒を複数本（２本〜１０数本）結束して使用
すれば、集合揚水筒の総断面積が大きくなり、下成層が
薄い場合であっても、比較的多量水を循環対流させるこ
とができる。Although each of the pumping cylinders is a single one, if a plurality of pumping cylinders (two to ten or more) are used in a bundle, the total cross-sectional area of the collecting pumping cylinder becomes large, and Even when the thickness is thin, a relatively large amount of water can be circulated and convected.
【００１４】前記散気環又は散気盤については、必ずし
も空気室付近である必要はないが、空気を可及的に微粒
子にして水中へ放出し、効率よく酸素を溶解させること
が望ましい。従って溶存酸素量の少ない水を微粒気泡に
長時間接触させる工夫が必要であるから、水底側の水を
上昇させ、かつ下成層中を上昇後においては勿論、更に
その大部は気液分離することはなく、拡散させることも
考えられる。The air diffusion ring or air diffusion plate does not necessarily need to be near the air chamber, but it is desirable that the air is made into fine particles as much as possible and released into the water to dissolve oxygen efficiently. Therefore, it is necessary to devise a method in which water with a small amount of dissolved oxygen is brought into contact with fine air bubbles for a long time, so that the water at the bottom of the water is raised and, after the rise in the lower stratification, of course, most of the gas is further separated into gas and liquid. It does not happen, and it is possible to diffuse.
【００１５】[0015]
【作用】即ちこの発明によれば、下成層において散気さ
せるので、下成層の溶液酸素量を急速に改善することが
できる。According to the present invention, since the gas is diffused in the underlayer, the amount of solution oxygen in the underlayer can be rapidly improved.
【００１６】また揚水筒による下成層の循環中に微粒気
泡を拡散させることにより、気泡中の酸素を可及的に溶
解させることができる。Further, by diffusing the fine air bubbles during the circulation of the lower stratification by the water pump, oxygen in the air bubbles can be dissolved as much as possible.
【００１７】[0017]
【実施例１】上部揚水筒１の下部外側に空気室２を嵌装
固定し、該空気室２の下部周縁から外方へ集気傘３を截
頭円錐状に連設し、前記集気傘３の内壁と所定の間隙を
保って連結杆４を介して下部揚水筒５の頂部を固定す
る。前記下部揚水筒５は、逆截頭円錐６（中空）の外側
へ、気泡彈７の通路となる間隙８を介して逆截頭円錐９
を遊嵌固定し、該逆截頭円錐９の下部へ、中間筒１０の
上端を連結し、前記中間筒１０の下部へ下部接続筒１０
ａの上部を嵌挿し、上部接続筒１０ａの下部へ下部接続
筒１０ｂの上部を連結し、下部接続筒１０ｂの外側へ空
気室１１を嵌装固定すると共に、空気室１１の外側へ散
気環１２を嵌着固定して、この発明の揚水装置１６を構
成した。前記上部揚水筒１の上部外側に浮子１３を固定
すると共に、下部接続筒１０ｂの下部へ索条１４を介し
てシンカー１５を連結し、前記浮子１３の浮力とシンカ
ー１５により揚水装置１６を自立型に設置することがで
きる。Embodiment 1 An air chamber 2 is fitted and fixed to the outside of the lower part of an upper pumping cylinder 1, and an air-collecting umbrella 3 is continuously provided in a truncated cone shape from the lower peripheral edge of the air chamber 2 to the outside. The top of the lower pumping cylinder 5 is fixed via the connecting rod 4 while maintaining a predetermined gap with the inner wall of the umbrella 3. The lower pumping cylinder 5 is provided with an inverted truncated cone 9 outside the inverted truncated cone 6 (hollow) through a gap 8 serving as a passage of the bubble 7.
And the upper end of the intermediate cylinder 10 is connected to the lower part of the inverted truncated cone 9, and the lower connecting cylinder 10 is connected to the lower part of the intermediate cylinder 10.
a, the upper portion of the lower connection tube 10b is connected to the lower portion of the upper connection tube 10a, and the air chamber 11 is fitted and fixed to the outside of the lower connection tube 10b. The water pumping device 16 of the present invention was constructed by fitting and fixing the water pump 12. A float 13 is fixed to the upper outer side of the upper pumping cylinder 1 and a sinker 15 is connected to a lower portion of the lower connecting pipe 10b via a cable 14 so that a water pump 16 is self-standing by the buoyancy of the float 13 and the sinker 15. Can be installed in
【００１８】前記実施例について、その動作を説明す
る。The operation of the above embodiment will be described.
【００１９】前記実施例において、エアーホース１７か
ら矢示１８のように、空気室１１へ加圧空気を送入する
と、空気は空気室１１の上部から溜り、空気室内の水位
を順次押し下げる。空気室内の水位が鎖線１９に達する
と、空気室内の空気は、矢示２０、２１、２２のように
流動して下部接続筒１０ｂ内へ入り、上部接続筒１０ａ
中を上昇中に気泡彈７となり、ついで逆截頭円錐９の内
側間隙８を矢示２４のように上昇し、集気傘３内に達す
ると、更に矢示２５のように移動し、矢示２６のように
空気室２内へ入る。一方散気環１２から矢示４５のよう
に噴出した微細気泡４６は、逆截頭円錐９、中間筒１
０、上部接続筒１０ａ及び下部接続筒１０ｂよりなる下
部揚水筒４７の周囲を矢示３９、３９のように上昇し乍
ら、付近の水に酸素を溶解されつつ集気傘３に達する
と、該集気傘３の内壁に沿って矢示２５のように上昇
し、前記気泡７と共に上部の空気室２内へ入り、前記説
明のように気泡彈７ａとなって上昇し、上部揚水筒によ
る循環対流の駆動源となる。空気室２内では、その頂部
より溜り、水位を順次押し下げるが、水位が鎖線２７の
位置に達すると、空気は矢示２８、２９、３０のように
移動し、揚水筒１に入り、気泡彈７ａとなって矢示３１
のように上昇する。気泡彈７ａが上昇すると、揚水筒１
の下部に設けた給水孔３２から矢示２３、２３のように
水を吸入し、この水も同様に上昇し、図３中矢示３３の
ように水面３４に放出される。一旦水面を盛り上げた水
は、ついで矢示３５のように四周へ拡散し、更に矢示３
６のように水平方向へ移動した後、矢示３７のように下
降し、矢示３８のように揚水筒１の下側へもどり、再び
給水孔３２から給水されるので、循環対流することにな
る。In the above embodiment, when pressurized air is sent from the air hose 17 to the air chamber 11 as indicated by an arrow 18, the air accumulates from the upper part of the air chamber 11 and sequentially lowers the water level in the air chamber. When the water level in the air chamber reaches the dashed line 19, the air in the air chamber flows as indicated by arrows 20, 21, and 22 and enters the lower connecting cylinder 10b, and the upper connecting cylinder 10a.
When the bubble rises in the inside, the bubble becomes bubble 7, and then rises in the inner gap 8 of the inverted truncated cone 9 as shown by arrow 24, and when it reaches the inside of the air-gathering umbrella 3, it further moves as shown by arrow 25, As shown in FIG. On the other hand, the fine air bubbles 46 ejected from the diffusion ring 12 as shown by the arrow 45 form the inverted truncated cone 9 and the intermediate cylinder 1.
0, ascending around the lower pumping cylinder 47 composed of the upper connecting cylinder 10a and the lower connecting cylinder 10b as indicated by arrows 39 and 39, and reaching the air-collecting umbrella 3 while dissolving oxygen in nearby water, It rises along the inner wall of the air-collecting umbrella 3 as shown by an arrow 25, enters the upper air chamber 2 together with the air bubbles 7, and rises as air bubbles 7a as described above, and is raised by the upper pumping cylinder. It is a driving source for circulating convection. In the air chamber 2, the water accumulates from the top and depresses the water level sequentially, but when the water level reaches the position of the dashed line 27, the air moves as indicated by arrows 28, 29, and 30, enters the pumping cylinder 1, It becomes 7a and arrow 31
Rise like. When the foam 7a rises, the pumping cylinder 1
Water is sucked from a water supply hole 32 provided in the lower part of the water as indicated by arrows 23, 23, and this water also rises similarly and is discharged to the water surface 34 as indicated by arrow 33 in FIG. The water, which once raised the water surface, diffuses around the circumference as indicated by arrow 35, and then spreads as indicated by arrow 3
After moving in the horizontal direction as indicated by 6, it descends as indicated by an arrow 37, returns to the lower side of the pumping cylinder 1 as indicated by an arrow 38, and is again supplied with water from the water supply hole 32. Become.
【００２０】また気泡彈７が中間筒１０内を矢示４８の
ように上昇するにつれて、中間筒１０の下端から水底４
０の付近の水を矢示４９、４９のように吸い込み、前記
気泡彈７と共に上昇させるので、逆截頭円錐から出た水
は、集気傘３に沿って矢示４１、４１のように拡散し、
ついで矢示４２、４２のように水平に進んだ後、矢示４
３、４３のように下降し、更に水底部を矢示４４、４４
のように下部接続筒１０ｂの下部へもどって矢示４９、
４９のように再び吸入される。即ち下成層内で循環対流
することになる。As the bubble bubble 7 rises in the intermediate cylinder 10 as indicated by an arrow 48, the water bottom 4
Water near 0 is drawn in as indicated by arrows 49 and 49 and rises together with the bubble 7, so that the water that has come out of the inverted truncated cone is drawn along the umbrella 3 as indicated by arrows 41 and 41. Spread,
After proceeding horizontally as indicated by arrows 42 and 42, arrow 4
It descends like 3, 43, and further indicates the bottom of the water with arrows 44, 44.
Return to the lower part of the lower connecting cylinder 10b as shown by arrow 49,
It is inhaled again like 49. That is, circulating convection flows in the lower stratification.
【００２１】前記において、集気傘３により捕集されな
かった微細気泡は、下部揚水筒からの放出水と共に、矢
示４１、４１の方向へ拡散し、循環対流中にその酸素を
更に溶解した後、水面へ上昇する。In the above, the fine bubbles not collected by the air-collecting umbrella 3 diffuse in the directions of arrows 41 and 41 together with the water discharged from the lower pumping cylinder, and further dissolve the oxygen in the circulating convection. Later, it rises to the surface.
【００２２】[0022]
【実施例２】この実施例は、実施例１の下部揚水筒４７
の外側へ所定間隔を保って案内筒４５を設置したもので
ある。これにより、散気環１２から出る微細気泡４６に
より生じた上昇流は水底４０付近の水を確実に上昇させ
ることができる。従って溶存酸素量の少ない水がよりよ
く微細気泡４６に接触することになる。Embodiment 2 This embodiment is different from Embodiment 1 in that the lower pumping cylinder 47 is provided.
The guide tube 45 is installed at a predetermined interval to the outside of the device. As a result, the upward flow generated by the fine bubbles 46 coming out of the diffusion ring 12 can surely raise the water near the water bottom 40. Therefore, water having a small amount of dissolved oxygen comes into better contact with the fine bubbles 46.
【００２３】前記実施例における揚水装置１６の動作に
ついては、実施例１と同様に付詳細な説明を省略する。As for the operation of the water pumping device 16 in the above-described embodiment, a detailed description thereof will be omitted as in the first embodiment.
【００２４】前記案内筒４５によって、散気環１２の微
細気泡により生じる緩徐な上昇流に方向性を付与させる
ことができる。By the guide cylinder 45, it is possible to give directionality to a gentle upward flow generated by fine bubbles in the diffusion ring 12.
【００２５】前記のように、上昇流に方向性を与える
と、水底付近の溶存酸素量の少ない水が矢示５０のよう
に流動し、矢示５１のように上昇するので、より早く微
細気泡に接触する為に微細気泡中の酸素の溶解効率も良
好になる。As described above, when the upward flow is given a direction, the water with a small amount of dissolved oxygen near the bottom of the water flows as indicated by arrow 50 and rises as indicated by arrow 51, so that fine bubbles are more quickly generated. As a result, the dissolving efficiency of oxygen in the fine bubbles is improved.
【００２６】前記案内筒４５は、例えば支材５２、５
２、５３、５３により下部揚水筒４７に支持させれば、
下部揚水筒４７を安定させることができる。The guide cylinder 45 includes, for example, supports 52, 5
If the lower pumping cylinder 47 is supported by 2, 53, 53,
The lower pumping cylinder 47 can be stabilized.
【００２７】この発明は、前記散気環１２に代えて散気
盤５４、５４の複数個を図５のように適宜数並べること
ができる。このようにすれば、必要とする散気量を得る
ことができる。According to the present invention, a plurality of diffusers 54, 54 can be arranged appropriately as shown in FIG. In this way, a required amount of air can be obtained.
【００２８】[0028]
【発明の効果】この発明によれば、揚水筒を上下２段と
し、下部揚水筒の外側に散気環等を設けて、これにより
生じる微細気泡を水と共に上昇すると共に拡散させたの
で効率よく下成層の溶存酸素量を増大させ、上下成層夫
々毎の水質改善を行うことができる効果がある。従っ
て、汽水湖のような塩水と淡水が上下成層を形成してい
る水域においても、魚類などに悪影響を与えることな
く、各成層の溶存酸素量を増大させ、水質を改善するこ
とができる効果がある。According to the present invention, the pumping cylinders are vertically arranged in two stages, and a diffuser ring or the like is provided outside the lower pumping cylinder, so that the fine bubbles generated by the rising and diffusing together with the water are diffused efficiently. This has the effect of increasing the dissolved oxygen content of the lower stratification and improving the water quality of each of the upper and lower stratifications. Therefore, even in waters such as brackish lakes where salt water and freshwater form upper and lower stratification, the dissolved oxygen amount of each stratification can be increased and the water quality can be improved without adversely affecting fish and the like. is there.
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明の実施例の一部を切断した正面図。FIG. 1 is a front view of a part of an embodiment of the present invention.
【図２】同じく他の実施例の一部を切断した正面図。FIG. 2 is a front view of a part of another embodiment.
【図３】同じく設置状態を示す正面図。FIG. 3 is a front view showing the same installation state.
【図４】同じく散気環を示す一部横断平面図。FIG. 4 is a partial cross-sectional plan view showing the diffusion ring.
【図５】同じく散気盤を示す一部横断平面図。FIG. 5 is a partial cross-sectional plan view showing the air diffuser.
１ 上部揚水筒 ２、１１ 空気室 ３ 集気傘 ５ 下部揚水筒 ６、９ 逆截頭円錐 ７ 気泡彈 １０ 中間筒 １２ 散気環 ３２ 吸水孔 ４５ 案内筒 ４６ 微細気泡 ５２ 散気盤 DESCRIPTION OF SYMBOLS 1 Upper pumping cylinder 2, 11 Air chamber 3 Air-collecting umbrella 5 Lower pumping cylinder 6, 9 Reverse truncated cone 7 Bubbles 10 Intermediate cylinder 12 Diffusion ring 32 Water absorption hole 45 Guide cylinder 46 Fine bubbles 52 Diffusion board
Claims (6)
筒からの気泡彈により各成層毎に対流循環させる方法に
おいて、上成層は水面付近の酸素量の多い水を巻き込ん
で溶存酸素量の改善を図り、下成層は下段揚水筒の外側
下部に微細気泡を発生させて緩徐な上昇流を生起し、前
記微細気泡中の酸素を溶解させて溶存酸素量の改善を図
り、前記微細気泡を含んだ水を下成層の上層部において
放射状に拡散させることを特徴とした上下成層を有する
水域の水質改善方法。1. A method of convectively circulating each stratified layer by air bubbles from upper and lower two-stage pumping cylinders corresponding to the upper and lower stratified layers, wherein the upper stratified layer entrains water having a high oxygen content near the water surface to reduce dissolved oxygen content. In order to improve the lower stratification, the lower stratification generates fine bubbles in the lower outside of the lower pumping cylinder to generate a slow ascending flow, dissolves oxygen in the fine bubbles, improves the dissolved oxygen amount, and improves the dissolved bubbles. A method for improving water quality of a water body having upper and lower stratifications, characterized in that the contained water is radially diffused in an upper part of a lower stratification.
に生成させるようにした請求項１記載の上下成層を有す
る水域の水質改善方法。2. The method for improving water quality of a water body having upper and lower stratifications according to claim 1, wherein the fine bubbles are generated in an annular shape outside the lower pumping cylinder.
は逆円錐状に放出させることを特徴とした請求項１記載
の上下成層を有する水域の水質改善方法。3. The method for improving water quality of a water body having upper and lower stratification according to claim 1, wherein bubbles are discharged in an inverted conical shape near an upper portion of the lower pumping cylinder.
連設すると共に、夫々の揚水筒の下部に空気室を設け、
前記上下部の揚水筒によって上成層と下成層の夫々にお
いて、上下循環対流を生起するようにした揚水装置にお
いて、上部揚水筒の空気室の底部へ、下部揚水筒の放出
空気流入孔を設けると共に、前記上部空気室の下部周縁
へ集気傘を連設し、前記下部揚水筒の空気室の外側へ、
散気手段を配置したことを特徴とする上下成層を有する
水域の水質改善装置。4. An upper chamber is connected to an upper part of a lower pumping cylinder at a lower part of the upper pumping cylinder, and an air chamber is provided at a lower part of each pumping cylinder.
In each of the upper stratification and the lower stratification by the upper and lower pumping cylinders, in a pumping apparatus that causes vertical convection, a discharge air inflow hole of the lower pumping cylinder is provided at the bottom of the air chamber of the upper pumping cylinder. An air-collecting umbrella is continuously connected to a lower periphery of the upper air chamber, and outside the air chamber of the lower pumping cylinder,
A water quality improvement device for a water body having upper and lower stratifications, wherein a diffuser is disposed.
彈通路を設けた請求項４記載の上下成層を有する水域の
水質改善装置。5. The apparatus according to claim 4, wherein an inverted conical air passage is provided above the lower pumping cylinder.
面に微小散気孔を穿設し、前記中空環体又は中空盤体に
加圧空気の給送ホースを連結した請求項４記載の上下成
層を有する水域の水質改善装置。6. The air diffusing means has a fine air diffusing hole formed in an upper surface of a hollow ring or a hollow disk, and a supply hose for pressurized air is connected to the hollow ring or the hollow disk. A water quality improvement device for a water body having upper and lower stratification as described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14220692A JP3277333B2 (en) | 1992-05-07 | 1992-05-07 | Method and apparatus for improving water quality of a water area having upper and lower stratification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14220692A JP3277333B2 (en) | 1992-05-07 | 1992-05-07 | Method and apparatus for improving water quality of a water area having upper and lower stratification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05309396A JPH05309396A (en) | 1993-11-22 |
| JP3277333B2 true JP3277333B2 (en) | 2002-04-22 |
Family
ID=15309864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14220692A Expired - Fee Related JP3277333B2 (en) | 1992-05-07 | 1992-05-07 | Method and apparatus for improving water quality of a water area having upper and lower stratification |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3277333B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5356182B2 (en) * | 2009-11-04 | 2013-12-04 | 独立行政法人水資源機構 | Submerged combined aeration equipment |
-
1992
- 1992-05-07 JP JP14220692A patent/JP3277333B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05309396A (en) | 1993-11-22 |
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