JP2009195811A - Water clarification apparatus - Google Patents

Water clarification apparatus Download PDF

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JP2009195811A
JP2009195811A JP2008039206A JP2008039206A JP2009195811A JP 2009195811 A JP2009195811 A JP 2009195811A JP 2008039206 A JP2008039206 A JP 2008039206A JP 2008039206 A JP2008039206 A JP 2008039206A JP 2009195811 A JP2009195811 A JP 2009195811A
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water
oxygen
pressure
dissolved
flow path
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JP5113552B2 (en
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Atsushi Tsuji
敦志 辻
Shinya Hirota
伸也 広田
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Panasonic Electric Works Co Ltd
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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
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    • Y02W10/10—Biological treatment of water, waste water, or sewage

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a water clarification apparatus capable of clarifying water quality by increasing an amount of dissolved oxygen in water in a water area regardless of the water depth of the water area. <P>SOLUTION: The water clarification apparatus for clarifying the water quality in the water area A includes: a pressurizing part 1 for pumping water sucked up from the water area A; an oxygen injection part 2 for injecting oxygen into water; a pressure-dissolving part 3 for dissolving oxygen into water by pressurization of water injected with oxygen by being pumped by the pressurizing part 1; and a pressure reducing part 4 for reducing the pressure of oxygen-dissolved water dissolved with oxygen in the pressure-dissolving part 3 to the atmospheric pressure, sequentially toward a flow-out side from a flow-in side. The pressurizing part 1, oxygen injection part 2 and pressure-dissolving part 3 are continuously operated, so that the oxygen-dissolved water is continuously supplied to the pressure reducing part 4, and the oxygen-dissolved water without causing any bubbles is continuously discharged from a flow-out side of the pressure reducing part 4, then the treated water is returned to the water area A. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、河川、池、湖沼、汽水域や海など、閉鎖水域や開放水域の水質を浄化する装置に関するものである。   The present invention relates to an apparatus for purifying water quality in a closed water area or an open water area such as a river, a pond, a lake, a brackish water area, and the sea.

上記のような水域の水質を浄化するために、水域の水中の溶存酸素量を増加させることが行なわれている。水中の溶存酸素量を増加させることによって、水域の水を好気性の生物で浄化することができるものである。   In order to purify the water quality in the water area as described above, the amount of dissolved oxygen in the water in the water area is increased. By increasing the amount of dissolved oxygen in water, the water in the water area can be purified by aerobic organisms.

例えば特許文献１では、空気を圧縮空気として貯蔵し、通気性フィルムに圧縮空気を透過させて微細な気泡を含有する微細気泡含有水を生成させ、水域の水底に配置された送水管の吐出孔からこの微細気泡含有水を水中に放出させることによって、水域の溶存酸素量を増加させるようにしている。
特開２００７−３３０９０６号公報 For example, in Patent Document 1, air is stored as compressed air, compressed air is allowed to pass through a breathable film to generate fine bubble-containing water containing fine bubbles, and a discharge hole of a water pipe arranged at the bottom of a water area The amount of dissolved oxygen in the water area is increased by releasing the water containing fine bubbles into water.
JP 2007-330906 A

上記の特許文献１のものでは、水底に配置された送水管の吐出孔から微細気泡含有水を水中に放出することによって、微細気泡含有水に含有される気泡を水圧で水中に溶解させて、溶存酸素量を増加させるようにしているものであるが、この水圧は水域の水深に依存するので、水深により酸素溶解量は変わることになる。例えば水深が１０ｍ以下であると水圧は０．１ＭＰａ以下であるので、気泡は容易に水中に溶解せずに水面まで浮上することになり、溶存酸素量の大きな増加を期待することはできない。従って、特許文献１のものは、水域の水深によっては水質浄化の効果を十分に得ることができないという問題を有するものであった。   In the thing of said patent document 1, by discharging | emitting the fine bubble containing water in water from the discharge hole of the water pipe arrange | positioned at the water bottom, the bubble contained in fine bubble containing water is dissolved in water by water pressure, Although the amount of dissolved oxygen is increased, this water pressure depends on the water depth of the water area, so the amount of dissolved oxygen varies depending on the water depth. For example, when the water depth is 10 m or less, the water pressure is 0.1 MPa or less, so that the bubbles are not easily dissolved in water but float to the surface of the water, and a large increase in the amount of dissolved oxygen cannot be expected. Therefore, the thing of patent document 1 has a problem that the effect of water purification cannot fully be acquired depending on the water depth of a water area.

本発明は上記の点に鑑みてなされたものであり、水域の水深に関係なく、水域の水の溶存酸素量を増加して水質浄化することができる水質浄化装置を提供することを目的とするものである。   The present invention has been made in view of the above points, and an object thereof is to provide a water purification apparatus capable of purifying water by increasing the amount of dissolved oxygen in the water area regardless of the water depth of the water area. Is.

本発明に係る水質浄化装置は、水域Ａの水質を浄化する装置であって、水域Ａから汲み上げられた水を圧送する加圧部１と、水に酸素を注入する酸素注入部２と、酸素を注入された水が加圧部１で圧送されることによる加圧で水に酸素を溶解させる加圧溶解部３と、加圧溶解部３で酸素を溶解させた酸素溶解水の圧力を、酸素溶解水の流入側から流出側に向かって順次大気圧まで減圧する減圧部４とを備え、加圧部１、酸素注入部２、加圧溶解部３の各部を連続的に運転させて、減圧部４に酸素溶解水を連続的に供給し、減圧部４の流出側から気泡の発生のない酸素溶解水を連続的に吐出させて水域Ａに返送するようにして成ることを特徴とするものである。   The water purification apparatus according to the present invention is an apparatus for purifying the water quality of the water area A, and includes a pressurizing unit 1 that pumps water pumped from the water area A, an oxygen injection unit 2 that injects oxygen into the water, an oxygen The pressure-dissolving part 3 that dissolves oxygen in water by pressurization by the water injected into the pressurizing part 1, and the pressure of oxygen-dissolved water in which oxygen is dissolved in the pressure-dissolving part 3, A decompression unit 4 that sequentially depressurizes the oxygen-dissolved water from the inflow side to the outflow side to the atmospheric pressure, and continuously operates each of the pressurization unit 1, the oxygen injection unit 2, and the pressurization dissolution unit 3; Oxygen-dissolved water is continuously supplied to the decompression unit 4, and oxygen-dissolved water without generation of bubbles is continuously discharged from the outflow side of the decompression unit 4 and returned to the water area A. Is.

この発明によれば、加圧部１による加圧によって水に酸素を溶解させるため、酸素を水に高濃度に溶解させることができるものであり、また酸素を高濃度で溶解した酸素溶解水の圧力を、減圧部４で流入側から流出側に向かって順次大気圧まで減圧するものであるため、酸素溶解水に気泡が発生することを防止して、高濃度で酸素が溶解した酸素溶解水をそのまま水域Ａに返送することができるものであり、酸素溶解水中に高濃度で溶解した酸素を水域Ａの水中に供給することができ、水域の水深に関係なく水域Ａの水の溶存酸素量を増加して水質浄化することができるものである。   According to the present invention, since oxygen is dissolved in water by pressurization by the pressurizing unit 1, oxygen can be dissolved in water at a high concentration, and oxygen-dissolved water in which oxygen is dissolved at a high concentration Since the pressure is gradually reduced from the inflow side to the outflow side by the decompression unit 4 to the atmospheric pressure, the generation of bubbles in the oxygen-dissolved water is prevented, and the oxygen-dissolved water in which oxygen is dissolved at a high concentration Can be returned to the water area A as it is, oxygen dissolved at a high concentration in the oxygen-dissolved water can be supplied to the water in the water area A, and the dissolved oxygen amount in the water area A regardless of the water depth in the water area The water quality can be purified by increasing the amount of water.

また請求項２の発明は、加圧溶解部３で水に溶解しない余剰酸素を排出する余剰酸素排出部５を備えて成ることを特徴とするものである。   Further, the invention of claim 2 is characterized in that it is provided with a surplus oxygen discharge section 5 that discharges surplus oxygen that does not dissolve in water in the pressure dissolution section 3.

この発明によれば、水に溶解しない余剰酸素を加圧溶解部３から排出することによって、余剰酸素が残留することによる加圧溶解部３内の酸素と水の比率を安定させて圧力変動を防ぐことができ、酸素の溶解効率を高く維持することができるものである。   According to the present invention, excess oxygen that does not dissolve in water is discharged from the pressure dissolution unit 3, thereby stabilizing the ratio of oxygen and water in the pressure dissolution unit 3 due to excess oxygen remaining, and pressure fluctuation. It is possible to prevent this, and the oxygen dissolution efficiency can be kept high.

また請求項３の発明は、上記の減圧部４を、加圧溶解部３から酸素溶解水を送り出す流路６に設けられ、酸素溶解水の圧力を大気圧にまで段階的に減圧する複数の圧力調整弁７で構成して成ることを特徴とするものである。   Further, the invention of claim 3 is provided with a plurality of pressure reducing sections 4 provided in a flow path 6 for sending oxygen-dissolved water from the pressure-dissolving section 3, and gradually reducing the pressure of the oxygen-dissolved water to atmospheric pressure. It is characterized by comprising a pressure regulating valve 7.

この発明によれば、圧力調整弁７による圧力調整で酸素溶解水の圧力を下げることができ、加圧溶解部３における圧力に応じて圧力調整弁７で減圧調整することによって、酸素溶解水に気泡が発生することを安定して防ぐことができるものである。   According to the present invention, the pressure of the oxygen-dissolved water can be reduced by adjusting the pressure with the pressure adjusting valve 7, and the pressure of the oxygen-dissolved water is reduced by the pressure adjusting valve 7 according to the pressure in the pressure-dissolving unit 3. It is possible to stably prevent the generation of bubbles.

また請求項４の発明は、上記の減圧部４を、流路断面積と流路長さの少なくとも一方の調整で酸素溶解水の圧力を大気圧にまで減圧するように形成された、加圧溶解部３から酸素溶解水を送り出す流路６で構成して成ることを特徴とするものである。   According to the invention of claim 4, the pressure reducing part 4 is formed by pressurizing the oxygen-dissolved water to atmospheric pressure by adjusting at least one of the channel cross-sectional area and the channel length. It is characterized by comprising a flow path 6 for sending oxygen-dissolved water from the dissolving part 3.

この発明によれば、加圧溶解部３から酸素溶解水を送り出す流路６の流路断面積と流路長によって、酸素溶解水の圧力を下げることができ、装置の構造を簡単なものに形成することができるものである。   According to the present invention, the pressure of the oxygen-dissolved water can be reduced by the flow path cross-sectional area and the flow path length of the flow path 6 for sending the oxygen-dissolved water from the pressure-dissolving section 3, and the structure of the apparatus is simplified It can be formed.

また請求項５の発明は、上記の減圧部４は、一つの流路で形成されていることを特徴とするものである。   The invention of claim 5 is characterized in that the decompression section 4 is formed by a single flow path.

この発明によれば、複数の流路を設けて減圧部４を形成する場合のような、装置構成が複雑になることがないものである。   According to the present invention, the apparatus configuration does not become complicated as in the case where the pressure reducing unit 4 is formed by providing a plurality of flow paths.

また請求項６の発明は、加圧溶解部３から酸素溶解水を送り出す流路６の圧力損失とこの流路６に付加した延長流路８の圧力損失の和が、加圧部１で圧送される水と酸素の押し込み圧によって加圧溶解部３内で水と酸素を加圧するのに必要な圧力となるように、流路６に延長流路８を付加して成ることを特徴とするものある。   In the invention of claim 6, the sum of the pressure loss of the flow path 6 for sending the oxygen-dissolved water from the pressure dissolving section 3 and the pressure loss of the extension flow path 8 added to the flow path 6 is An extension channel 8 is added to the channel 6 so that the pressure required to pressurize the water and oxygen in the pressurizing and dissolving section 3 by the pressure of water and oxygen to be applied. There are things.

この発明によれば、流路６に延長流路８を付加することによって、絞り弁を用いる必要なく、加圧部１からの押し込み圧で加圧溶解部３内の圧力を確保することができ、この圧力で水に酸素を溶解させることができるものである。   According to the present invention, by adding the extension flow path 8 to the flow path 6, it is possible to secure the pressure in the pressurizing and dissolving section 3 with the pushing pressure from the pressurizing section 1 without using a throttle valve. In this pressure, oxygen can be dissolved in water.

本発明によれば、加圧部１による加圧によって水に酸素を溶解させるようにしたので、酸素を水に高濃度に溶解させることができるものであり、また酸素を高濃度で溶解した酸素溶解水の圧力を、減圧部４で流入側から流出側に向かって順次大気圧まで減圧するようにしたので、酸素溶解水に気泡が発生することを防止して、高濃度で酸素が溶解した酸素溶解水をそのまま水域Ａに返送することができるものであり、酸素溶解水中に高濃度で溶解した酸素を水域Ａの水中に供給することができ、水域の水深に関係なく水域Ａの水の溶存酸素量を増加して水質浄化することができるものである。   According to the present invention, since oxygen is dissolved in water by pressurization by the pressurizing unit 1, oxygen can be dissolved in water at a high concentration, and oxygen in which oxygen is dissolved at a high concentration Since the pressure of the dissolved water was gradually reduced from the inflow side to the outflow side to the atmospheric pressure by the decompression unit 4, the generation of bubbles in the oxygen-dissolved water was prevented, and oxygen was dissolved at a high concentration. Oxygen-dissolved water can be returned to the water area A as it is, oxygen dissolved at a high concentration in the oxygen-dissolved water can be supplied to the water in the water area A, and the water in the water area A can be supplied regardless of the water depth of the water area. Water quality can be purified by increasing the amount of dissolved oxygen.

以下、本発明を実施するための最良の形態を説明する。   Hereinafter, the best mode for carrying out the present invention will be described.

図１は本発明の実施の形態の一例を示すものであり、加圧溶解部３の流出側と流入側にそれぞれ配管で形成される流路１５，６が接続してある。流入側の流路１５は一端を加圧溶解部３に接続し、他端の導入口３０を水域Ａの水中に配置してある。この水域Ａは特定のものに限定されないものであり、河川、池、湖沼、汽水域や海など、閉鎖水域や開放水域の総てを含むものである。また流路１５の途中には加圧部１が設けてある。加圧部１は、例えば、水域Ａの水を吸い上げて加圧溶解部３に圧送するポンプ１８などで形成されるものである。   FIG. 1 shows an example of an embodiment of the present invention, in which flow paths 15 and 6 formed by piping are respectively connected to the outflow side and the inflow side of the pressure dissolution unit 3. One end of the flow path 15 on the inflow side is connected to the pressure dissolution unit 3, and the inlet 30 on the other end is disposed in the water of the water area A. This water area A is not limited to a specific one, and includes all closed water areas and open water areas such as rivers, ponds, lakes, brackish water areas and the sea. A pressurizing unit 1 is provided in the middle of the flow path 15. The pressurizing unit 1 is formed by, for example, a pump 18 that sucks up water in the water area A and pumps it to the pressurizing and dissolving unit 3.

またこの流入側の流路１５に酸素注入部２が接続してある。酸素注入部２は酸素を流路１５に供給して注入するためのものである。酸素注入部２から注入される酸素としては、純酸素であってもよいが、空気など酸素を含むガス中の酸素であればよい。例えば空気中の酸素を供給して注入する場合には、一端を大気中に開放させた管体の他端を流路１５に接続して酸素注入部２を形成することができる。また純酸素を供給して注入する場合には、酸素を封入したボンベなどを流路１５に接続して酸素注入部２を形成することができる。流路１５への酸素注入部２の接続位置は、加圧溶解部３より上流側の位置であればよく、図１のように加圧部１より上流側の流路１５に接続するようにしても、あるいは加圧部１より下流側の流路１５に接続するようにしてもいずれでもよい。   Further, the oxygen injection part 2 is connected to the flow path 15 on the inflow side. The oxygen injection part 2 is for supplying oxygen to the flow path 15 and injecting it. The oxygen injected from the oxygen injection unit 2 may be pure oxygen, but may be oxygen in a gas containing oxygen such as air. For example, in the case where oxygen in the air is supplied and injected, the oxygen injection section 2 can be formed by connecting the other end of the tube whose one end is opened to the atmosphere to the flow path 15. When pure oxygen is supplied and injected, the oxygen injection part 2 can be formed by connecting a cylinder filled with oxygen to the flow path 15. The connecting position of the oxygen injection part 2 to the flow path 15 may be a position upstream of the pressurizing / dissolving part 3 and is connected to the flow path 15 upstream of the pressurizing part 1 as shown in FIG. Alternatively, it may be either connected to the flow path 15 on the downstream side of the pressurizing unit 1.

一方、流出側の流路６は一端を加圧溶解部３に接続し、他端の吐出口３１は水域Ａの水底に配置してあり、この流路６には減圧部４が設けてある。また加圧溶解部３には余剰酸素排出部５が設けてある。余剰酸素排出部５は、例えば、一端を大気に開放した管体を、加圧溶解部３内の気圧が所定の圧力以上になると開口するガス抜き弁などを介して加圧溶解部３に接続することによって形成してある。   On the other hand, one end of the flow path 6 on the outflow side is connected to the pressure dissolution unit 3, and the discharge port 31 on the other end is disposed at the bottom of the water area A. The pressure reducing unit 4 is provided in the flow path 6. . Further, a surplus oxygen discharge unit 5 is provided in the pressure dissolution unit 3. The surplus oxygen discharge unit 5 connects, for example, a tube whose one end is opened to the atmosphere to the pressurization and dissolution unit 3 via a degassing valve or the like that opens when the pressure in the pressurization and dissolution unit 3 exceeds a predetermined pressure. It is formed by doing.

上記のように形成される水質浄化装置にあって、ポンプ１８で形成される加圧部１を作動させると、流路１５の端部の導入口３０から水域Ａの水が吸い上げられ、流路１５を通して加圧溶解部３へこの水が圧送して供給される。このように流路１５内を水が流れる際に、酸素注入部２から酸素が流路１５内に吸引されて水に酸素が注入される。そしてこのように酸素が注入された水を加圧部１で加圧溶解部３へ圧送して送り込むことによって、この圧送による押し込み力で加圧溶解部３内において水と酸素に圧力が加わって高圧になる。このように加圧溶解部３内で水と酸素を加圧することによって、水に酸素を効率高く飽和量以上に溶解させることができ、水に酸素が高濃度で溶解した酸素溶解水を得ることができるものである。   In the water purification apparatus formed as described above, when the pressurizing unit 1 formed by the pump 18 is operated, the water in the water area A is sucked up from the inlet 30 at the end of the channel 15, and the channel This water is fed to the pressure dissolution unit 3 through 15 and supplied. As described above, when water flows through the flow path 15, oxygen is sucked into the flow path 15 from the oxygen injection section 2 and oxygen is injected into the water. Then, the water into which oxygen is injected in this manner is sent by being fed to the pressure dissolving unit 3 by the pressurizing unit 1, and pressure is applied to the water and oxygen in the pressure dissolving unit 3 by the pushing force by this pressure feeding. Become high pressure. Thus, by pressurizing water and oxygen in the pressure dissolving part 3, oxygen can be efficiently dissolved in water to a saturation level or more, and oxygen-dissolved water in which oxygen is dissolved at a high concentration in water is obtained. It is something that can be done.

このように加圧溶解部３内において水と酸素を加圧して強制的に効率良く溶解させ、高濃度で酸素が溶解した酸素溶解水を短時間で生成することができるため、加圧溶解部３内で生成された酸素溶解水を流路６を通して送り出しながら、加圧溶解部３内で水に酸素を溶解させるようにすることができるものである。従って、加圧溶解部３をタンクのような容積の大きなもので形成する必要がなくなるものであり、装置規模を小さくして装置のコストを低減することが可能になるものである。   In this way, since the water and oxygen are pressurized and dissolved in the pressure dissolving part 3 forcibly and efficiently, oxygen-dissolved water in which oxygen is dissolved at a high concentration can be generated in a short time. The oxygen-dissolved water generated in 3 is sent out through the flow path 6, and oxygen can be dissolved in water in the pressure-dissolving unit 3. Therefore, it is not necessary to form the pressure dissolving part 3 with a large volume such as a tank, and the apparatus scale can be reduced and the cost of the apparatus can be reduced.

ここで、酸素注入部２から注入される酸素の全量が水に溶解しないと、加圧溶解部３内で水に溶解しない余剰酸素が生じるが、加圧溶解部３に余剰酸素排出部５を設け、酸素の溶解飽和量以上の溶解できない余剰酸素を加圧溶解部３から排出することによって、余剰酸素が残留することによる加圧溶解部３内の酸素と水の比率を安定させて圧力変動を防ぐことができ、酸素の溶解効率を高く維持することができるものである。   Here, if the total amount of oxygen injected from the oxygen injection unit 2 is not dissolved in water, surplus oxygen that does not dissolve in water is generated in the pressure dissolution unit 3, but the excess oxygen discharge unit 5 is provided in the pressure dissolution unit 3. Provided, by discharging excess oxygen that cannot be dissolved more than the dissolved oxygen saturation amount from the pressure dissolution unit 3, the ratio of oxygen and water in the pressure dissolution unit 3 due to the residual oxygen remaining is stabilized and the pressure fluctuation Can be prevented, and the dissolution efficiency of oxygen can be kept high.

そして、上記のように加圧溶解部３で生成された酸素溶解水は、流路６を通して送り出されるが、加圧溶解部３内で酸素溶解水は高圧に加圧された状態にあるので、そのまま水域Ａに返送されると、急激な圧力低下によって、酸素溶解水中に気泡が発生するおそれがあり、酸素溶解量が減少し、またキャビテーションが発生することがある。このために本発明では、流路６に減圧部４を設け、加圧溶解部３内で加圧された状態の酸素溶解水を流路６を通して送り出す際に、減圧部４で大気圧まで気泡を発生させることなく減圧をした後に吐出するようにしてある。   And the oxygen-dissolved water produced | generated in the pressurization melt | dissolution part 3 as mentioned above is sent out through the flow path 6, However, Since the oxygen melt | dissolution water is in the state pressurized by the high pressure in the pressurization melt | dissolution part 3, If returned to the water area A as it is, bubbles may be generated in the oxygen-dissolved water due to a rapid pressure drop, the amount of dissolved oxygen may decrease, and cavitation may occur. For this reason, in the present invention, when the pressure reducing part 4 is provided in the flow path 6 and oxygen-dissolved water pressurized in the pressure dissolving part 3 is sent out through the flow path 6, It is made to discharge after decompressing without generating.

ここで、加圧溶解部３内で生成されるのと同じ濃度の酸素溶解水について、加圧溶解部３内で加圧されている圧力と同じ圧力から大気圧まで減圧する際に、気泡が発生しない減圧度を、予め計算や測定で求めておき、減圧部４をこの予め求めた減圧度で、酸素溶解水が流入側する側から流出側に向かって、酸素溶解水の圧力を段階的に、あるいは連続的に、徐々に大気圧まで減圧できるように設定してある。従って、加圧溶解部３内で加圧された酸素溶解水を、減圧部４において気泡が発生しない減圧度で徐々に大気圧まで減圧した後に、流路６の先端から吐出することによって、酸素溶解水に気泡が発生することなく酸素溶解水を吐出することができるものであり、加圧溶解部３で飽和量以上に酸素が溶解された酸素溶解水を、安定した高濃度の状態のまま送り出して利用することが可能になるものである。   Here, when the oxygen-dissolved water having the same concentration as that generated in the pressure-dissolving unit 3 is depressurized from the same pressure as that pressurized in the pressure-dissolving unit 3 to the atmospheric pressure, bubbles are generated. The degree of decompression that does not occur is obtained in advance by calculation or measurement, and the pressure of the oxygen-dissolved water is stepwise from the side where the oxygen-dissolved water flows into the outflow side at the decompression section 4 at the pre-determined decompression degree. Or continuously or gradually so that the pressure can be reduced to atmospheric pressure. Accordingly, the oxygen-dissolved water pressurized in the pressure-dissolving unit 3 is gradually depressurized to the atmospheric pressure at a depressurization degree in which bubbles are not generated in the decompression unit 4, and then discharged from the tip of the flow path 6. Oxygen-dissolved water can be discharged without generating bubbles in the dissolved water, and the oxygen-dissolved water in which oxygen is dissolved to a saturation amount or more in the pressure-dissolving unit 3 remains in a stable high concentration state. It can be sent out and used.

図２は、減圧部４の具体的な実施の形態の一例を示すものであり、加圧溶解部３に接続される流路６に、水の流れ方向に沿って複数の圧力調整弁７（７ａ，７ｂ，７ｃ）を設けることによって、減圧部４を形成するようにしてある。このように減圧部４を複数の圧力調整弁７を備えて形成することによって、気泡が発生しない減圧度で酸素溶解水の圧力を段階的に徐々に下げることができるものである。   FIG. 2 shows an example of a specific embodiment of the decompression unit 4, and a plurality of pressure regulating valves 7 ( 7a, 7b, 7c) is provided to form the decompression section 4. Thus, by forming the decompression unit 4 with the plurality of pressure regulating valves 7, the pressure of the oxygen-dissolved water can be gradually lowered step by step with a degree of decompression that does not generate bubbles.

各圧力調整弁７ａ，７ｂ，７ｃは、酸素溶解水に気泡発生が生じない減圧度で減圧するように設定されているものであり、この減圧度は予め計算や測定で求めた数値に設定されるものである。例えば、加圧溶解部３から流路６に送り出された酸素溶解水の加圧圧力が０．５ＭＰａであるとき、気泡が発生しない減圧量が０．１２ＭＰａであると測定によって判明しているとすると、圧力調整弁７ａで酸素溶解水の圧力を０．１２ＭＰａ減圧して、０．３８ＭＰａに落とす。また酸素溶解水の加圧圧力が０．３８ＭＰａであるとき、気泡が発生しない減圧量が０．１６ＭＰａであると測定によって判明しているとすると、次の圧力調整弁７ｂで酸素溶解水の圧力を０．１６ＭＰａ減圧して、０．２２ＭＰａに落とす。さらに酸素溶解水の加圧圧力が０．２２ＭＰａであるとき、気泡が発生しない減圧量が０．２２ＭＰａ以上であると測定によって判明しているとすると、次の圧力調整弁７ｃで酸素溶解水の圧力を０．２２ＭＰａ減圧して、加圧圧力を０ＭＰａに落とし、大気圧まで減圧することができるものである。尚、圧力調整弁７による減圧量は、水温、酸素の溶解濃度、加圧溶解部３内の圧力、流路６の径などに応じて変動するものであり、装置毎に、計算や測定をして、適宜設定されるものである。   Each pressure regulating valve 7a, 7b, 7c is set to depressurize at a degree of decompression that does not generate bubbles in the oxygen-dissolved water, and this degree of decompression is set to a numerical value obtained by calculation or measurement in advance. Is. For example, when the pressurized pressure of oxygen-dissolved water sent from the pressure-dissolving unit 3 to the flow path 6 is 0.5 MPa, it is found by measurement that the amount of reduced pressure at which no bubbles are generated is 0.12 MPa. Then, the pressure of the oxygen-dissolved water is reduced by 0.12 MPa by the pressure adjusting valve 7a and dropped to 0.38 MPa. Further, when the pressure of oxygen-dissolved water is 0.38 MPa, if it is determined by measurement that the amount of reduced pressure at which bubbles are not generated is 0.16 MPa, the pressure of oxygen-dissolved water is determined by the next pressure regulating valve 7b. Is reduced to 0.12 MPa and reduced to 0.22 MPa. Furthermore, when the pressure of oxygen-dissolved water is 0.22 MPa, if it is found by measurement that the amount of reduced pressure at which bubbles do not occur is 0.22 MPa or more, the oxygen-dissolved water is detected by the next pressure regulating valve 7c. The pressure can be reduced to 0.22 MPa, the applied pressure can be reduced to 0 MPa, and the pressure can be reduced to atmospheric pressure. Note that the amount of pressure reduction by the pressure regulating valve 7 varies depending on the water temperature, the dissolved concentration of oxygen, the pressure in the pressurized dissolving section 3, the diameter of the flow path 6, and the like. Thus, it is set as appropriate.

図３は、減圧部４の具体的な実施の形態の他の一例を示すものであり、加圧溶解部３に接続される流路６を流路断面積が異なる複数の管体２０ａ，２０ｂ，２０ｃを備えて形成し、この流路断面積の異なる複数の管体２０ａ，２０ｂ，２０ｃで減圧部４が形成されるようにしてある。   FIG. 3 shows another example of a specific embodiment of the decompression unit 4, and a plurality of tubes 20a and 20b having different channel cross-sectional areas in the channel 6 connected to the pressure dissolution unit 3 are shown. 20c, and the decompression section 4 is formed by a plurality of pipe bodies 20a, 20b, 20c having different channel cross-sectional areas.

図３（ａ）の実施の形態では、流路断面積が異なる、つまり内径の異なる複数の管体２０ａ，２０ｂ，２０ｃを一体に連ねるようにしてあり、酸素溶解水の流れの上流側から下流側へと、徐々に管体２０ａ，２０ｂ，２０ｃの径が小さくなるようにしてある。また図３（ｂ）の実施の形態では、内径の異なる複数の管体２０ａ，２０ｂ，２０ｃをレジューサ２１を介して接続して連ねるようにしてあり、酸素溶解水の流れの上流側から下流側へと、徐々に管体２０ａ，２０ｂ，２０ｃの径が小さくなるようにしてある。さらに図３（ｃ）の実施の形態では、酸素溶解水の流れの上流側から下流側へと連続的に径が小さくなる管体２０ａ，２０ｂ，２０ｃを一体に連ねるようにしてある。   In the embodiment of FIG. 3A, a plurality of pipes 20a, 20b, and 20c having different flow path cross-sectional areas, that is, different inner diameters, are integrally connected, and from the upstream side to the downstream side of the flow of oxygen-dissolved water. The diameters of the tubular bodies 20a, 20b, and 20c are gradually reduced toward the side. In the embodiment of FIG. 3 (b), a plurality of tubes 20a, 20b, 20c having different inner diameters are connected and connected via a reducer 21, and from the upstream side to the downstream side of the flow of oxygen-dissolved water. The diameters of the pipe bodies 20a, 20b, and 20c are gradually reduced. Further, in the embodiment of FIG. 3C, the pipes 20a, 20b, and 20c whose diameter continuously decreases from the upstream side to the downstream side of the flow of the oxygen-dissolved water are integrally connected.

この図３のものにあって、各管体２０ａ，２０ｂ，２０ｃの内径はφｄ１＞φｄ２＞φｄ３であるので、各管体２０ａ，２０ｂ，２０ｃ内の酸素溶解水の流速はＶ１＜Ｖ２＜Ｖ３となり、各管体２０ａ，２０ｂ，２０ｃ内の酸素溶解水の圧力はＰ１＞Ｐ２＞Ｐ３となる。従って、加圧溶解部３から送り出される酸素溶解水の圧力Ｐ１を気泡が発生しない減圧度で、図３（ａ）（ｂ）のものでは段階的に減圧して、また図３（ｃ）のものでは連続的に減圧して、Ｐ３の大気圧まで徐々に下げることができるものである。 In FIG. 3, the inner diameters of the pipe bodies 20a, 20b, and 20c are φd 1 > φd 2 > φd 3 , so the flow rate of the oxygen-dissolved water in each of the pipe bodies 20a, 20b, and 20c is V 1. <V 2 <V 3 , and the pressure of the oxygen-dissolved water in each of the tubes 20a, 20b, 20c is P 1 > P 2 > P 3 . Thus, a reduced pressure degree of bubble pressure P 1 of oxygen dissolved water fed from the pressure dissolution unit 3 does not occur, FIGS. 3 (a) those in is stepwise reduced pressure (b), and FIG. 3 (c) intended are those which can be lowered continuously reduced pressure, gradually to atmospheric pressure P 3.

図４は、減圧部４の具体的な実施の形態の他の一例を示すものであり、加圧溶解部３に接続される流路６を通して酸素溶解水を排出する際に、流路６内を酸素溶解水が流れる際の圧力損失によって、酸素溶解水に気泡が発生しない減圧速度で酸素溶解水の圧力を徐々に連続的に低下させ、酸素溶解水の圧力を大気圧にまで低下させるようにしてある。従って図４（ａ）の実施の形態では、加圧溶解部３内での圧力がＰ１の酸素溶解水を、流路６内を通過させる際にＰ２〜Ｐｎ−１へと、酸素溶解水に気泡が発生しない減圧速度で徐々に連続的に圧力を低下させ（Ｐ１＞Ｐ２＞Ｐｎ−１）、流路６の終端では酸素溶解水の圧力Ｐｎが大気圧にまで低下するように、流路６の流路断面積と管路長さＬを設定するようにしてあり、このような流路断面積と管路長さＬを有する流路６によって減圧部４が形成されるものである。 FIG. 4 shows another example of a specific embodiment of the decompression unit 4, and when the oxygen-dissolved water is discharged through the channel 6 connected to the pressure dissolution unit 3, The pressure loss when oxygen-dissolved water flows causes the pressure of oxygen-dissolved water to gradually and continuously decrease at a decompression rate that does not generate bubbles in the oxygen-dissolved water, so that the pressure of oxygen-dissolved water is reduced to atmospheric pressure. It is. In the embodiment of FIG. 4 (a) Thus, the oxygen dissolution water pressure P 1 in the press-welding within the solution 3, the P 2 ~P n-1 when passing through the flow channel 6, the oxygen The pressure is gradually and continuously reduced at a decompression rate at which bubbles do not occur in the dissolved water (P 1 > P 2 > P n-1 ), and the pressure P n of the oxygen-dissolved water reaches atmospheric pressure at the end of the flow path 6. The flow path cross-sectional area and the pipe length L of the flow path 6 are set so as to decrease, and the decompression unit 4 is configured by the flow path 6 having such a flow path cross-sectional area and the pipe length L. Is formed.

この管路長さＬは、次の式から設定することができる。すなわち、
流体の関係式Ｐ＝λ・（Ｌ／ｄ）・（ｖ２／２ｇ）
［Ｐは加圧溶解部３内の圧力、λは管摩擦係数、ｄは内径、ｖは流速、ｇは加速度]
から、Ｌ＝（Ｐ・ｄ・２ｇ）／（λ・ｖ２）を導くことができ、この式から計算して流路６の管路長さＬを求めることができるものである。このように、流路６の管路長さＬを所定長さに形成するだけで減圧部４を形成することができるものであり、装置の構造をより簡単なものに形成することができるものである。このような管路長さＬが長い流路６で形成される減圧部４は、例えば図４（ｂ）のような長いホース４ａで形成することができる。 The pipe length L can be set from the following equation. That is,
Fluid relational expression P = λ · (L / d) · (v 2 / 2g)
[P is the pressure in the pressure dissolving section 3, λ is the coefficient of friction of the tube, d is the inner diameter, v is the flow velocity, and g is the acceleration]
From this, L = (P · d · 2g) / (λ · v 2 ) can be derived, and the pipe length L of the flow path 6 can be obtained by calculation from this equation. As described above, the decompression section 4 can be formed only by forming the pipe length L of the flow path 6 to a predetermined length, and the structure of the apparatus can be made simpler. It is. The decompression section 4 formed by the flow path 6 having such a long pipe line length L can be formed by a long hose 4a as shown in FIG. 4B, for example.

上記のように本発明では加圧部１によって水と酸素を加圧溶解部３に圧送し、この際の押し込み圧によって加圧溶解部３内で水と酸素を加圧して酸素を溶解させるようにしているが、この押し込み圧を受けて加圧溶解部３内に必要な圧力が発生するようにする必要がある。このように加圧部１からの押し込み圧を受ける圧力を確保するために、加圧溶解部３の流出側の流路６に絞り弁などの絞り部を設けることが考えられるが、このように絞り部を流路６に設けると、加圧溶解部３で生成された酸素溶解水を流路６に送り出して排出する際に、絞り部の前後で大きな圧力差が生じ、酸素溶解水が急激に減圧されることになり、酸素溶解水に気泡が発生するおそれがある。   As described above, in the present invention, water and oxygen are pumped to the pressurizing / dissolving unit 3 by the pressurizing unit 1, and water and oxygen are pressurized in the pressurizing / dissolving unit 3 by the pressing pressure at this time so as to dissolve oxygen. However, it is necessary to generate a necessary pressure in the pressurizing / dissolving portion 3 by receiving the pushing pressure. In order to secure the pressure that receives the indentation pressure from the pressurizing unit 1 as described above, it is conceivable to provide a throttle unit such as a throttle valve in the flow path 6 on the outflow side of the pressurizing and dissolving unit 3. When the throttle portion is provided in the flow path 6, when the oxygen-dissolved water generated in the pressure dissolution section 3 is sent to the flow path 6 and discharged, a large pressure difference occurs before and after the throttle section, and the oxygen-dissolved water rapidly There is a risk that bubbles will be generated in the oxygen-dissolved water.

そこで図５の実施の形態では、流路６の圧力損失を利用して、流路６に絞り部を設ける必要なく、押し込み圧を受ける圧力を確保するようにしている。このとき、上記各実施形態の流路６の長さでは、流路６の圧力損失で押し込み圧を受ける圧力を確保することは難しいので、流路６の加圧溶解部３と反対側の端部に延長流路８を付加するようにしてある。すなわち、流路６の減圧部４も含めた全体の圧力損失を算出し、加圧部１からの押し込み圧によって加圧溶解部３内で水と酸素を加圧するのに必要な圧力と、この流路６の圧力損失との差を算出し、さらにこの差の圧力損失が生じる管路の長さを上記の式から算出して、この管路長さの延長流路８を流路６に付加するようにしてある。このように、流路６の圧力損失と延長流路８の圧力損失の和が、加圧部１で圧送される酸素と水の押し込み圧によって加圧溶解部３内で水と酸素を加圧するのに必要な圧力となるように、流路６に延長流路８を付加することによって、絞り弁などの絞り部を用いる必要なく、加圧部１からの押し込み圧で加圧溶解部３内の加圧力を確保して、水に酸素を溶解させることができるものである。   Therefore, in the embodiment of FIG. 5, the pressure loss of the flow path 6 is used to secure the pressure that receives the indentation pressure without the need to provide the throttle portion in the flow path 6. At this time, with the length of the flow path 6 of each of the above embodiments, it is difficult to secure the pressure that receives the indentation pressure due to the pressure loss of the flow path 6. An extension channel 8 is added to the part. That is, the total pressure loss including the decompression unit 4 of the flow path 6 is calculated, and the pressure required to pressurize water and oxygen in the pressurization dissolution unit 3 by the indentation pressure from the pressurization unit 1, The difference from the pressure loss of the flow path 6 is calculated, and the length of the pipe line in which the pressure loss of this difference occurs is calculated from the above formula, and the extended flow path 8 of this pipe length is changed to the flow path 6. They are added. In this way, the sum of the pressure loss of the flow path 6 and the pressure loss of the extension flow path 8 pressurizes water and oxygen in the pressurizing and dissolving section 3 by the pushing pressure of oxygen and water pumped by the pressurizing section 1. By adding the extension flow path 8 to the flow path 6 so that the pressure required for the pressure is reached, it is not necessary to use a throttling portion such as a throttling valve. Thus, it is possible to dissolve oxygen in water.

図６は水質浄化装置の具体的な一例を示すものであり、水域Ａの水は流路１５に導入口３０から導入される。流路１５には酸素が導入される酸素注入部２が接続してあり、酸素が注入された水はポンプで形成される加圧部１によって、小容量のタンクで形成される加圧溶解部３に圧送される。このように酸素が注入された水が加圧溶解部３に圧送されることによって、加圧溶解部３内で水に酸素が溶解された酸素溶解水が生成される。そしてこの酸素溶解水は加圧溶解部３から流路６に送り出され、流路６の先端の吐出口３１から送り出される。この流路６には減圧部４が設けてあり、加圧溶解部３から送り出された酸素溶解水は大気圧まで減圧された後に流路６の端部の吐出口３１から吐出され、気泡が発生しない状態で酸素溶解水を送り出すことができる。図６の実施の形態では、減圧部４は、図３（ａ）の内径が異なる管体２０ａ，２０ｂ，２０ｃを連ねたもので形成してある。   FIG. 6 shows a specific example of the water purification device, and water in the water area A is introduced into the flow path 15 from the introduction port 30. An oxygen injection part 2 into which oxygen is introduced is connected to the flow path 15, and the water into which oxygen has been injected is a pressure dissolving part formed in a small capacity tank by a pressure part 1 formed by a pump. 3 is pumped. Thus, oxygen-injected water in which oxygen is dissolved in water is generated in the pressure-dissolving unit 3 by pumping the water into which oxygen has been injected to the pressure-dissolving unit 3. The oxygen-dissolved water is sent out from the pressure dissolving unit 3 to the flow path 6 and is sent out from the discharge port 31 at the tip of the flow path 6. The flow path 6 is provided with a decompression section 4, and the oxygen-dissolved water sent out from the pressure dissolution section 3 is decompressed to atmospheric pressure and then discharged from the discharge port 31 at the end of the flow path 6, and bubbles are generated. Oxygen-dissolved water can be sent out without being generated. In the embodiment of FIG. 6, the decompression unit 4 is formed by connecting the tubular bodies 20a, 20b, and 20c having different inner diameters as shown in FIG.

この装置にあって、ポンプで形成される加圧部１を連続運転することによって、酸素注入部２、加圧溶解部３を連続的に運転させて、減圧部４に酸素溶解水を連続的に供給するようにすることができるものであり、減圧部４の流出側である吐出口３１から気泡の発生のない酸素溶解水を連続的に吐出させることができるものである。また、減圧部４は加圧溶解部３から酸素溶解水を送り出す流路６の一部として設けられており、そしてこの減圧部４は酸素溶解水の圧力を流入側から流出側に向かって順次大気圧まで減圧するものであるため、減圧部４を例えば内径２〜５０ｍｍ程度の比較的大きい流路として形成することができるものであり、異物が混入しても減圧部４内が詰まるようなことがないものである。さらにこのような構成の減圧部４を設けることによって、減圧部４を流れる酸素溶解水のレイノルズ数が臨界レイノルズ数（Ｒｅ＝２３２０）より小さなレイノズル数である層流状態だけではなく、臨界レイノルズ数より大きなレイノルズ数である乱流状態でも対応することが可能になるものである。さらに、減圧部４をこのように内径の大きな流路として形成することによって、酸素溶解水の供給量を多くすることができ、減圧部４を一つの流路のみで形成することが可能になるものであり、装置構成を簡単なものに形成することができるものである。   In this apparatus, by continuously operating the pressurizing unit 1 formed by a pump, the oxygen injecting unit 2 and the pressurizing / dissolving unit 3 are continuously operated to continuously supply oxygen-dissolved water to the decompressing unit 4. The oxygen-dissolved water without generation of bubbles can be continuously discharged from the discharge port 31 on the outflow side of the decompression unit 4. The decompression unit 4 is provided as a part of a flow path 6 for sending oxygen-dissolved water from the pressure-dissolving unit 3, and the decompression unit 4 sequentially increases the pressure of the oxygen-dissolved water from the inflow side to the outflow side. Since the pressure is reduced to atmospheric pressure, the pressure reducing portion 4 can be formed as a relatively large flow path having an inner diameter of about 2 to 50 mm, for example, and the inside of the pressure reducing portion 4 is clogged even if foreign matter is mixed in. There is nothing. Furthermore, by providing the decompression unit 4 having such a configuration, not only the laminar flow state in which the Reynolds number of the oxygen-dissolved water flowing through the decompression unit 4 is smaller than the critical Reynolds number (Re = 2320), but also the critical Reynolds number It is possible to cope with a turbulent flow state having a larger Reynolds number. Furthermore, by forming the decompression section 4 as a flow path having a large inner diameter in this way, it is possible to increase the supply amount of oxygen-dissolved water, and it is possible to form the decompression section 4 with only one flow path. Therefore, it is possible to form a simple apparatus configuration.

そして上記のように加圧部１で気泡を発生することなく大気圧にまで減圧された酸素溶解水は、水域Ａの水底に配置された流路６の吐出口３１から水域Ａ内に返送されるものである。酸素溶解水は高濃度で水が溶解しているので、この酸素溶解水が水域Ａの水中に返送されると、酸素溶解水が水域Ａの水中に拡散するに従って、酸素溶解水に溶解した酸素も水域Ａの水中に拡散して溶解し、水域Ａの溶存酸素量を増大させることができるものである。ここで、本発明において得られる酸素溶解水は、特許文献１の場合のように微細気泡を含有させるようにしたものではなく、上記のように加圧部１による加圧によって加圧溶解部３で水に酸素を高濃度に溶解させるようにしたものであるため、水域Ａの水深に関係なく、酸素溶解水に溶解した酸素を水中に直接的に供給して溶存酸素量を増大させることができるものである。そしてこのように水域Ａの溶存酸素量を増大させることによって、水域Ａを好気性雰囲気にして好気性細菌による浄化作用で、水や汚泥を浄化することができるものである。   The oxygen-dissolved water decompressed to atmospheric pressure without generating bubbles in the pressurizing unit 1 as described above is returned into the water area A from the discharge port 31 of the flow path 6 disposed at the bottom of the water area A. Is. Since the oxygen-dissolved water is dissolved at a high concentration, when the oxygen-dissolved water is returned to the water in the water area A, the oxygen dissolved in the oxygen-dissolved water is diffused as the oxygen-dissolved water diffuses into the water in the water area A. Can also be diffused and dissolved in the water of the water area A to increase the amount of dissolved oxygen in the water area A. Here, the oxygen-dissolved water obtained in the present invention does not contain fine bubbles as in the case of Patent Document 1, but the pressure-dissolving part 3 by pressurization by the pressure part 1 as described above. Since oxygen is dissolved in water at a high concentration, oxygen dissolved in oxygen-dissolved water can be directly supplied to water to increase the amount of dissolved oxygen regardless of the water depth of water area A. It can be done. And by increasing the amount of dissolved oxygen in the water area A in this way, the water area and the sludge can be purified by the purification action by aerobic bacteria with the water area A as an aerobic atmosphere.

図７（ａ）は、本発明の装置において加圧溶解部３で水に酸素を溶解し、酸素溶解水を減圧部４で大気圧にまで減圧したときの、水温と酸素濃度の関係を示すものである。例えば水域Ａの水の温度が２５℃であると、４０ｍｇ／Ｌ以上の高い濃度で酸素が溶解しており、この酸素溶解水を水域Ａに返送することによって、水域Ａの水中の溶存酸素濃度を容易に高めることができることがわかる。また図７（ｂ）は、本発明の装置において加圧溶解部３で１０℃の水に酸素を溶解し、酸素溶解水を減圧部４で大気圧にまで減圧した後に、２５℃で放置したときの、溶存酸素濃度と経過時間との関係を示すものである。７００時間を経過しても、３０ｍｇ／Ｌ程度の高い溶存酸素濃度を維持しており、この酸素溶解水を水系Ａに返送することによって、水域Ａの水中の溶存酸素濃度を長期に亘って高く維持できることがわかる。   FIG. 7A shows the relationship between the water temperature and the oxygen concentration when oxygen is dissolved in water by the pressure dissolving unit 3 and the oxygen-dissolved water is decompressed to atmospheric pressure by the decompressing unit 4 in the apparatus of the present invention. Is. For example, when the temperature of the water in the water area A is 25 ° C., oxygen is dissolved at a high concentration of 40 mg / L or more. By returning this oxygen-dissolved water to the water area A, the dissolved oxygen concentration in the water in the water area A It can be seen that can be easily increased. FIG. 7 (b) shows that in the apparatus of the present invention, oxygen was dissolved in water at 10 ° C. by the pressure dissolution unit 3, and the oxygen-dissolved water was reduced to atmospheric pressure by the pressure reduction unit 4, and then left at 25 ° C. This shows the relationship between the dissolved oxygen concentration and the elapsed time. Even after 700 hours, a high dissolved oxygen concentration of about 30 mg / L is maintained, and by returning this oxygen-dissolved water to the water system A, the dissolved oxygen concentration in the water in the water area A is increased over a long period of time. It can be seen that it can be maintained.

本発明の実施の形態の一例を示す概略図である。It is the schematic which shows an example of embodiment of this invention. 同上の一部の一例を示す概略図である。It is the schematic which shows an example of a part of the same as the above. 同上の一部の他の一例を示すものであり、（ａ）（ｂ）（ｃ）はそれぞれ概略図である。It shows another example of a part of the above, (a) (b) (c) is a schematic diagram respectively. 同上の一部の他の一例を示すものであり、（ａ）は概略図、（ｂ）は斜視図である。It shows another example of a part of the above, (a) is a schematic view, (b) is a perspective view. 同上の一部の他の一例を示す概略図である。It is the schematic which shows another example of a part of the same as the above. （ａ）（ｂ）は本発明の実施の形態の一例を示す斜視図である。(A) (b) is a perspective view which shows an example of embodiment of this invention. （ａ）は酸素溶解水の酸素濃度と温度との関係を示すグラフ、（ｂ）は酸素溶解水の酸素濃度と経過時間との関係を示すグラフである。(A) is a graph showing the relationship between the oxygen concentration of oxygen-dissolved water and temperature, and (b) is a graph showing the relationship between the oxygen concentration of oxygen-dissolved water and elapsed time.

符号の説明Explanation of symbols

１ 加圧部
２ 酸素注入部
３ 加圧溶解部
４ 減圧部
５ 余剰酸素排出部
６ 流路
７ 圧力調整弁
８ 延長流路 DESCRIPTION OF SYMBOLS 1 Pressurization part 2 Oxygen injection part 3 Pressurization melt | dissolution part 4 Depressurization part 5 Excess oxygen discharge part 6 Flow path 7 Pressure control valve 8 Extension flow path

Claims (6)

水域の水質を浄化する装置であって、水域から汲み上げられた水を圧送する加圧部と、水に酸素を注入する酸素注入部と、酸素を注入された水が加圧部で圧送されることによる加圧で水に酸素を溶解させる加圧溶解部と、加圧溶解部で酸素を溶解させた酸素溶解水の圧力を、酸素溶解水の流入側から流出側に向かって順次大気圧まで減圧する減圧部とを備え、加圧部、酸素注入部、加圧溶解部の各部を連続的に運転させて、減圧部に酸素溶解水を連続的に供給し、減圧部の流出側から気泡の発生のない酸素溶解水を連続的に吐出させて水域に返送するようにして成ることを特徴とする水質浄化装置。   An apparatus for purifying the water quality of a water area, wherein a pressurizing unit that pumps water pumped from the water area, an oxygen injection unit that injects oxygen into water, and water into which oxygen is injected is pumped by the pressurizing unit. The pressure dissolution part that dissolves oxygen in water by pressurization by pressure, and the pressure of the oxygen-dissolved water in which oxygen is dissolved in the pressure dissolution part are gradually increased from the inflow side to the outflow side to the atmospheric pressure. A decompression section for decompressing, continuously operating each of the pressurization section, the oxygen injection section, and the pressurization dissolution section, continuously supplying oxygen-dissolved water to the decompression section, and bubbles from the outflow side of the decompression section A water purification apparatus characterized in that oxygen-dissolved water without generation of water is continuously discharged and returned to the water area. 加圧溶解部で水に溶解しない余剰酸素を排出する余剰酸素排出部を備えて成ることを特徴とする請求項１に記載の水質浄化装置。   The water purification apparatus according to claim 1, further comprising a surplus oxygen discharge unit that discharges surplus oxygen that does not dissolve in water in the pressure dissolution unit. 減圧部を、加圧溶解部から酸素溶解水を送り出す流路に設けられ、酸素溶解水の圧力を大気圧にまで段階的に減圧する複数の圧力調整弁で構成して成ることを特徴とする請求項１又は２に記載の水質浄化装置。   The pressure reducing part is provided in a flow path for sending oxygen-dissolved water from the pressure-dissolving part, and comprises a plurality of pressure regulating valves that stepwise reduce the pressure of the oxygen-dissolved water to atmospheric pressure. The water purification apparatus according to claim 1 or 2. 減圧部を、流路断面積と流路長さの少なくとも一方の調整で酸素溶解水の圧力を大気圧にまで減圧するように形成された、加圧溶解部から酸素溶解水を送り出す流路で構成して成ることを特徴とする請求項１又は２に記載の水質浄化装置。   The pressure reducing part is a flow path for sending oxygen-dissolved water from the pressure-dissolving part formed so as to reduce the pressure of the oxygen-dissolved water to atmospheric pressure by adjusting at least one of the channel cross-sectional area and the channel length. The water purification apparatus according to claim 1 or 2, wherein the water purification apparatus is configured. 減圧部は、一つの流路で形成されていることを特徴とする請求項３又は４に記載の水質浄化装置。   The water purification apparatus according to claim 3 or 4, wherein the decompression unit is formed by a single flow path. 加圧溶解部から酸素溶解水を送り出す流路の圧力損失とこの流路に付加した延長流路の圧力損失の和が、加圧部で圧送される水と酸素の押し込み圧によって加圧溶解部内で水と酸素を加圧するのに必要な圧力となるように、流路に延長流路を付加して成ることを特徴とする請求項１乃至５のいずれか１項に記載の水質浄化装置。   The sum of the pressure loss of the flow path for sending oxygen-dissolved water from the pressure-dissolving part and the pressure loss of the extension flow path added to this flow path is the inside of the pressure-dissolving part due to the pushing pressure of water and oxygen pumped by the pressure part. The water purification apparatus according to any one of claims 1 to 5, wherein an extension channel is added to the channel so that the pressure required for pressurizing water and oxygen is obtained.
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