JP3372401B2 - Closed tank type dissolved oxygen removing device and closed piping system using the same - Google Patents
Closed tank type dissolved oxygen removing device and closed piping system using the sameInfo
- Publication number
- JP3372401B2 JP3372401B2 JP19826595A JP19826595A JP3372401B2 JP 3372401 B2 JP3372401 B2 JP 3372401B2 JP 19826595 A JP19826595 A JP 19826595A JP 19826595 A JP19826595 A JP 19826595A JP 3372401 B2 JP3372401 B2 JP 3372401B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- liquid
- passage
- dissolved oxygen
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Degasification And Air Bubble Elimination (AREA)
- Physical Water Treatments (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は液中の溶存酸素を除
去する溶存酸素除去技術に関し、詳しくは、密閉式のタ
ンクに対して、そのタンク内に処理対象液を導入する液
導入路と、タンク内から処理済液を導出する液導出路
と、タンク内に窒素ガスを加圧供給する窒素ガス供給路
と、タンク内の気体域から気体を排出する気体排出路を
接続した密閉タンク式の溶存酸素除去装置、及び、これ
を用いた密閉式配管設備に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dissolved oxygen removing technique for removing dissolved oxygen in a liquid, and more specifically, a liquid introducing passage for introducing a liquid to be treated into a closed tank, A closed tank type that connects the liquid discharge path for discharging the treated liquid from the tank, the nitrogen gas supply path for supplying nitrogen gas under pressure to the tank, and the gas discharge path for discharging the gas from the gas area in the tank The present invention relates to a dissolved oxygen removing device, and a closed pipe facility using the device.
【０００２】[0002]
【従来の技術】上記の如き密閉タンク式の溶存酸素除去
装置では、タンク内で液中の溶存酸素と供給窒素ガスと
を置換させて処理対象液から溶存酸素を除去し、そし
て、この置換により液中から放出されてタンク内気体域
に溜まる酸素ガスを余剰の窒素ガスとともに気体排出路
によりタンク内から排出するが、従来、この種の溶存酸
素除去装置においては、気体排出路に所定水頭の水封部
を設け、これにより、タンク内への液導入に対しタンク
内気体域を所定の圧力状態に保ってその存在を安定化す
ることで、装置運転の安定化を図ったものが提案されて
いる（例えば、特開昭６３−１６０８６号公報参照）。2. Description of the Related Art In a closed tank type dissolved oxygen removing apparatus as described above, the dissolved oxygen in the liquid is replaced with the supply nitrogen gas in the tank to remove the dissolved oxygen from the liquid to be treated, and by this replacement, Oxygen gas released from the liquid and stored in the gas region in the tank is discharged from the tank together with the surplus nitrogen gas through the gas discharge passage, but conventionally, in this type of dissolved oxygen removing device, a predetermined head of water is discharged in the gas discharge passage. It is proposed that a water sealing part is provided to stabilize the operation of the device by keeping the gas region in the tank at a predetermined pressure state and stabilizing its existence when the liquid is introduced into the tank. (See, for example, JP-A-63-16086).
【０００３】[0003]
【発明が解決しようとする課題】しかし、液導入路から
タンク内にかかる圧力が高く、また、液導出路からタン
ク内にかかる圧力（換言すれば液導出の背圧）も高い状
況において、十分な供給圧力での窒素ガス供給を行いな
がらタンク内気体域を安定的に保った装置運転を行う場
合、上記の従来装置では、水封部の必要水頭が大きくな
って装置が大型化する問題がある。However, in a situation where the pressure applied from the liquid introduction path into the tank is high, and the pressure applied from the liquid discharge path into the tank (in other words, the back pressure of the liquid discharge) is high, it is sufficient. When operating the device while stably maintaining the gas region in the tank while supplying nitrogen gas at various supply pressures, the above-mentioned conventional device has a problem that the water head required for the water sealing part becomes large and the device becomes large. is there.
【０００４】殊に、ビルにおける空調用の密閉式配管設
備などで循環液中の溶存酸素による配管腐食を防止する
ことを目的として、この密閉タンク式の溶存酸素除去装
置を配管設備における液循環路の途中に装備する場合な
ど、その液循環路中における溶存酸素除去装置の装備高
さによっては数１０ｍ水頭もの圧力が液循環路からタン
ク内にかかる為、水封部もその高さ寸法が数１０ｍにも
及ぶ大型なものとなり装置設置が極めて難しくなる。In particular, for the purpose of preventing pipe corrosion due to dissolved oxygen in the circulating liquid in a closed pipe facility for air conditioning in a building, etc., this closed tank type dissolved oxygen removing device is used as a liquid circulation path in the pipe facility. Depending on the equipment height of the dissolved oxygen removal device in the liquid circulation path such as when it is installed in the middle of the water, a pressure of several tens of meters head is applied to the tank from the liquid circulation path, so the height dimension of the water sealing part is also several. It will be as large as 10 m, making installation of the device extremely difficult.
【０００５】以上の実情に対し、本発明の主たる課題
は、タンク内にかかる圧力が高い場合についても装置の
大型化を伴わずに対処できるようにする点にある。In view of the above situation, the main problem of the present invention is to be able to deal with the case where the pressure applied to the tank is high without increasing the size of the apparatus.
【０００６】[0006]
【課題を解決するための手段】・請求項１記載の発明で
は、窒素ガス供給路からの十分な供給圧力での窒素ガス
供給の下で、密閉式タンクの内部圧力が目標圧力よりも
高くなる状況（換言すれば、タンク内気体域が拡大する
状況）では、気体排出路からの気体排出量を増大させる
側に弁を操作してタンク内部圧力の上昇を抑止し、ま
た、密閉式タンクの内部圧力が目標圧力よりも低くなる
状況（換言すれば、タンク内気体域が縮小する状況）で
は、気体排出路からの気体排出量を減少させる側に弁を
操作してタンク内部圧力の低下を抑止し、これにより、
液導入路や液導出路からの印加圧力に見合う目標圧力の
タンク内気体域を安定的に保つ。In the invention according to claim 1, the internal pressure of the sealed tank becomes higher than the target pressure under the nitrogen gas supply at a sufficient supply pressure from the nitrogen gas supply passage. In a situation (in other words, the gas area in the tank expands), the valve is operated on the side that increases the gas discharge amount from the gas discharge passage to suppress the rise of the tank internal pressure, and In a situation where the internal pressure becomes lower than the target pressure (in other words, the gas area in the tank shrinks), operate the valve on the side that reduces the gas discharge amount from the gas discharge passage to reduce the tank internal pressure. Deter and by this
A gas region in the tank having a target pressure corresponding to the pressure applied from the liquid introduction path or the liquid discharge path is stably maintained.
【０００７】つまり、請求項１記載の発明によれば、十
分な供給圧力での窒素ガス供給の下でタンク内の気体域
からの気体の排出を気体排出路における弁により制御し
てタンク内部圧力を目標圧力に調整することで、液導入
路や液導出路からの印加圧力に見合う目標圧力のタンク
内気体域を安定的に保つから、液導入路からタンク内に
かかる圧力、及び、液導出路からタンク内にかかる圧力
が高い場合についても、先述の水封部を用いる従来装置
の如き装置の大型化を伴わずに、タンク内気体域を安定
的に保った適切な装置運転を実施できる。That is, according to the first aspect of the invention, the gas region in the tank is supplied under the nitrogen gas supply at a sufficient supply pressure.
The gas in the tank is controlled to a target pressure by controlling the gas discharge from the valve by a valve in the gas discharge path , so that the gas area in the tank at the target pressure that matches the pressure applied from the liquid introduction path and the liquid discharge path is stable. Therefore, even when the pressure applied to the tank from the liquid introduction path and the pressure applied to the tank from the liquid discharge path are high, without increasing the size of the device such as the conventional device using the water sealing part described above. Therefore, it is possible to carry out an appropriate device operation while keeping the gas region in the tank stable.
【０００８】・請求項２記載の発明では、液導入路から
タンク内に導入される導入液をタンク内気体域に対し散
布することで、導入液（処理対象液）とタンク内気体域
における窒素ガスとの接触面積を大きくして、液中溶存
酸素とタンク内窒素ガスとの置換を効率良く行わせる。In the invention according to claim 2, from the liquid introduction path
By spraying the introduced liquid introduced into the tank to the gas region in the tank, the contact area between the introduced liquid (processing liquid) and the nitrogen gas in the gas region in the tank is increased, and the dissolved oxygen in the liquid and the tank The internal nitrogen gas is efficiently replaced.
【０００９】つまり、請求項２記載の発明によれば、液
中溶存酸素と窒素ガスとの置換効率の向上により溶存酸
素の除去性能を効果的に向上でき、また、この性能向上
により装置の小型化も可能となる。That is, according to the second aspect of the present invention, the efficiency of removing dissolved oxygen can be effectively improved by improving the efficiency of replacement of dissolved oxygen in the liquid with the nitrogen gas, and the improvement in performance can reduce the size of the apparatus. It becomes possible.
【００１０】・請求項３記載の発明では、密閉式液循環
路における循環液の一部を前記の液導入路に分流して前
記タンクに導入し、この分流液中の溶存酸素をタンク内
窒素ガスとの置換により分流液から分離除去する。そし
て、この処理済の分流液を、引き続きの上記分流導入に
伴いタンクから液導出路へ導出して、液循環路における
循環液に再び合流させ、これにより、循環運転に伴い密
閉式液循環路における循環液全体の溶存酸素濃度を次第
に低下させて、溶存酸素による配管腐食を防止する。In the third aspect of the invention, a part of the circulating liquid in the closed liquid circulation passage is branched into the liquid introduction passage and introduced into the tank, and the dissolved oxygen in the divided liquid is stored in the tank nitrogen. It is separated and removed from the split stream by replacement with gas. Then, the treated split-flow liquid is led out from the tank to the liquid discharge passage along with the above-described split-flow introduction, and merged again with the circulating liquid in the liquid circulation passage. The concentration of dissolved oxygen in the entire circulating fluid is gradually reduced to prevent pipe corrosion due to dissolved oxygen.
【００１１】つまり、請求項３記載の発明によれば、密
閉タンク式の溶存酸素除去装置に要求される単位時間当
たりの処理能力が、液循環路から一部分流した循環液を
処理するに足りるだけの小さなものとなるから、装備対
象である密閉式液循環路の単位時間当たり循環流量が大
きい場合についても、小型な密閉タンク式溶存酸素除去
装置で密閉式液循環路における循環液の溶存酸素濃度を
十分に低下させて配管腐食を効果的に防止できる。That is, according to the third aspect of the present invention, the processing capacity per unit time required for the closed tank type dissolved oxygen removing device is sufficient to process the circulating liquid partially flowing from the liquid circulating passage. Therefore, even if the circulation flow rate per unit time of the sealed liquid circulation path that is the target of equipment is large, the dissolved oxygen concentration of the circulating liquid in the closed liquid circulation path can be reduced by the small closed tank type dissolved oxygen removal device. Can be sufficiently reduced to effectively prevent pipe corrosion.
【００１２】・請求項４記載の発明では、液循環路にお
ける循環液の溶存酸素濃度を低下させる必要があると
き、前述の如く液循環路における循環液の一部を液導入
路へ分流させて、この分流液に溶存酸素除去処理を施
し、一方、液循環路における循環液の溶存酸素濃度を低
下させる必要が無いときには、液導入路への循環液分流
を停止させる。In the invention according to claim 4, when it is necessary to reduce the dissolved oxygen concentration of the circulating liquid in the liquid circulating passage, a part of the circulating liquid in the liquid circulating passage is diverted to the liquid introducing passage as described above. The dissolved oxygen removal treatment is performed on the split liquid, and when it is not necessary to reduce the dissolved oxygen concentration of the circulating liquid in the liquid circulation passage, the circulation liquid split flow to the liquid introduction passage is stopped.
【００１３】つまり、請求項４記載の発明によれば、液
循環路における循環液の溶存酸素濃度を低下させる必要
がないときには、液導入路への循環液分流を停止するこ
とにより、分流のための流動状態調整で多少なりとも生
じる液搬送動力の浪費を回避した状態で液循環路での液
循環運転を実施できて、動力節減を図ることができ、ま
た、分流の停止に合わせ前記タンクに対する窒素ガス供
給及び前記タンク内の気体域からの気体排出も停止させ
て窒素ガスの浪費も防止できる。That is, according to the fourth aspect of the invention, when it is not necessary to reduce the dissolved oxygen concentration of the circulating liquid in the liquid circulating passage, the circulating liquid branching to the liquid introducing passage is stopped so that the divided liquid is divided. The liquid circulation operation in the liquid circulation path can be performed while avoiding the waste of the liquid transfer power that may occur when adjusting the flow state of the device, and power can be saved. It is possible to prevent waste of nitrogen gas by stopping the supply of nitrogen gas and the discharge of gas from the gas region in the tank .
【００１４】・請求項５記載の発明では、液循環路にお
ける循環液の溶存酸素濃度が目標濃度よりも高いとき、
前記の分流による溶存酸素除去処理を実施して液循環路
における循環液の溶存酸素濃度を低下させ、また、液循
環路における循環液の溶存酸素濃度が目標濃度以下のと
きには、前記の分流を停止して溶存酸素除去処理を停止
する、といった切り換え操作を循環液の検出溶存酸素濃
度に基づき自動的に行わせる。In the invention according to claim 5, when the dissolved oxygen concentration of the circulating liquid in the liquid circulation path is higher than the target concentration,
Dissolved oxygen removal treatment by the above-mentioned split flow is carried out to reduce the dissolved oxygen concentration of the circulating liquid in the liquid circulation path, and when the dissolved oxygen concentration of the circulating liquid in the liquid circulation path is below the target concentration, the above-mentioned divided flow is stopped. Then, a switching operation such as stopping the dissolved oxygen removal process is automatically performed based on the detected dissolved oxygen concentration of the circulating fluid.
【００１５】つまり、請求項５記載の発明によれば、液
循環路における循環液の溶存酸素濃度を目標濃度に調整
維持することを自動的に行えることで、管理者負担を軽
減でき、また、必要以上に溶存酸素除去処理を行うこと
による窒素ガスの浪費も防止できる。That is, according to the fifth aspect of the present invention, the dissolved oxygen concentration of the circulating liquid in the liquid circulation path can be automatically adjusted and maintained at the target concentration, so that the burden on the administrator can be reduced, and It is also possible to prevent waste of nitrogen gas due to the unnecessary oxygen removal treatment.
【００１６】・請求項６記載の発明では、補給液を密閉
タンク式溶存酸素除去装置におけるタンクを介して液循
環路に供給する形態とし、このタンク通過過程において
補給液中の溶存酸素をタンク内窒素ガスとの置換により
補給液から分離除去する。[0016] In the invention of claim 6, wherein the auxiliary liquid supply through the tank in a sealed tank dissolved oxygen remover to a form supplied to the liquid circulation path, dissolved oxygen replenishment liquid in the tank passes through the process Separated and removed from the replenisher by replacement with nitrogen gas in the tank.
【００１７】つまり、請求項６記載の発明によれば、多
量の溶存酸素を含む補給液を溶存酸素除去処理した上で
液循環路に対して供給するから、液補給にかかわらず液
循環路における循環液の溶存酸素濃度を低く保つことが
でき、配管腐食の防止を一層効果的に達成できる。That is, according to the sixth aspect of the present invention, the replenishing liquid containing a large amount of dissolved oxygen is subjected to the dissolved oxygen removal treatment and then supplied to the liquid circulation passage. The dissolved oxygen concentration of the circulating fluid can be kept low, and pipe corrosion can be prevented more effectively.
【００１８】・請求項７記載の発明では、循環液の一部
を液導入路へ分流させて溶存酸素除去する前記の作用状
態と、液循環路への循環液分流を停止して溶存酸素除去
処理を停止する前記の非作用状態との切り換えにかかわ
らず、液導出路を介してタンクと液循環路との連通状態
を保つことにより、この密閉タンク式溶存酸素除去装置
のタンクを密閉式液循環路に対する密閉式膨張タンクと
して兼用使用し、このタンクにより液循環路における循
環液の体積変化を吸収する。In the invention according to claim 7, the above-mentioned operating state in which a part of the circulating liquid is diverted to the liquid introducing passage to remove dissolved oxygen, and the circulating liquid diverting to the liquid circulating passage is stopped to remove dissolved oxygen. Regardless of switching to the inactive state where the processing is stopped, the tank of this closed tank type dissolved oxygen removal device is kept closed by maintaining the communication state between the tank and the liquid circulation path via the liquid discharge path. It is also used as a closed expansion tank for the circulation path, and this tank absorbs the volume change of the circulating liquid in the liquid circulation path.
【００１９】つまり、請求項７記載の発明によれば、密
閉タンク式溶存酸素除去装置におけるタンクを液循環路
に対する膨張タンクとして兼用使用することで、別途の
専用膨張タンクを並用する場合に比べ、配管設備の設備
コストを低減し得る。That is, according to the invention of claim 7, the tank in the closed tank type dissolved oxygen removing device is also used as an expansion tank for the liquid circulation path, so that a dedicated expansion tank is separately used, The equipment cost of the piping equipment can be reduced.
【００２０】[0020]
【発明の実施の形態】図１において、１は冷凍機やボイ
ラなどの熱源装置２と空調機などの負荷装置３とにわた
って循環ポンプ４により冷水や温水を循環させる密閉式
の水循環路であり、一般に熱源装置２と負荷装置３とは
設置高さに高低差を有する。DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is a closed water circulation passage for circulating cold water or hot water by a circulation pump 4 across a heat source device 2 such as a refrigerator or a boiler and a load device 3 such as an air conditioner, In general, the heat source device 2 and the load device 3 have a difference in installation height.
【００２１】５は上記の水循環路１に接続装備した溶存
酸素除去装置５であり、この溶存酸素除去装置５により
循環水Ｗ中の溶存酸素を除去して、密閉式水循環路１に
おける循環水全体（保有循環水）を溶存酸素濃度の低い
状態にすることで、溶存酸素に原因する配管腐食を防止
する。Reference numeral 5 denotes a dissolved oxygen removing device 5 connected to the water circulating passage 1 described above. The dissolved oxygen removing device 5 removes dissolved oxygen in the circulating water W, and the whole circulating water in the closed water circulating passage 1 is removed. By keeping the (retained circulating water) a low dissolved oxygen concentration, pipe corrosion caused by dissolved oxygen is prevented.
【００２２】溶存酸素除去装置５には密閉タンク式を採
用してあり、その構造については、密閉式のタンク６に
対し、そのタンク内に処理対象水Ｗを導入する水導入路
７と、タンク底部から処理済水Ｗを導出する水導出路８
と、タンク内に窒素ガスＮ2を加圧供給する窒素ガス供
給路９と、タンク内上部の気体域ａから気体を排出する
気体排出路１０を接続し、また、タンク内において水導
入路７から導入される導入水Ｗをタンク内気体域ａに対
して散水する散水管１１を設けてある。The dissolved oxygen removing device 5 adopts a closed tank type, and its structure is as follows: a closed type tank 6 and a water introduction path 7 for introducing the water W to be treated into the tank. Water derivation path 8 for deriving the treated water W from the bottom
And a nitrogen gas supply passage 9 for pressurizing and supplying nitrogen gas N 2 into the tank, and a gas discharge passage 10 for discharging gas from a gas area a in the upper part of the tank are connected, and a water introduction passage 7 is provided in the tank. A sprinkling pipe 11 is provided to sprinkle the introduced water W introduced from the above into the gas region a in the tank.
【００２３】つまり、窒素ガス供給路９からの供給によ
り窒素ガスＮ2 をタンク内気体域ａに充満させ、このタ
ンク内気体域ａに対し処理対象水Ｗを散水することで、
処理対象水Ｗ中の溶存酸素とタンク内気体域ａの窒素ガ
スＮ2 とを効率良く置換させ、これにより、処理対象水
Ｗ中の溶存酸素を水中からタンク内気体域ａへ放出させ
て、処理対象水Ｗから溶存酸素を除去する。そして、溶
存酸素が除去されてタンク内に溜まる処理済水Ｗを、処
理対象水Ｗの引き続きのタンク内導入に並行して水導出
路８によりタンク６から取り出す。That is, the tank gas region a is filled with the nitrogen gas N 2 by the supply from the nitrogen gas supply passage 9, and the water W to be treated is sprinkled in the tank gas region a.
The dissolved oxygen in the water W to be treated is efficiently replaced with the nitrogen gas N 2 in the gas region a in the tank, whereby the dissolved oxygen in the water W to be treated is released from the water into the gas region a in the tank a, Dissolved oxygen is removed from the water W to be treated. Then, the treated water W from which dissolved oxygen has been removed and which is accumulated in the tank is taken out from the tank 6 through the water outlet passage 8 in parallel with the subsequent introduction of the water W to be treated into the tank.
【００２４】また、この処理において処理対象水Ｗ中の
溶存酸素がタンク内気体域ａに放出されることに対し、
この放出酸素ガスＯ2 を含むタンク内気体域ａの気体
（すなわち、放出酸素ガスＯ2 により希釈された窒素ガ
スＮ2 ）を気体排出路１０によりタンク外へ排出するこ
とと、新たな窒素ガスＮ2 を窒素ガス供給路９からタン
ク６に供給することをもって、タンク内気体域ａにおけ
る窒素ガス濃度を高く保ち、これにより、継続処理にお
いて溶存酸素の除去効率を高く維持する。Further, in this treatment, the dissolved oxygen in the water W to be treated is released to the gas region a in the tank,
Tank gas zone a of gas containing the released oxygen gas O 2 (i.e., the nitrogen gas N 2 diluted by the release oxygen gas O 2) and be discharged to the outside of the tank by a gas discharge passage 10, new nitrogen gas By supplying N 2 to the tank 6 from the nitrogen gas supply passage 9, the nitrogen gas concentration in the tank gas region a is kept high, and thereby the removal efficiency of dissolved oxygen is kept high in the continuous treatment.
【００２５】１２はタンク内の気体域ａからの気体の排
出を制御する排気弁、１３はタンク６の内部圧力ｐを検
出する圧力センサ、１４は排気弁１２に対する弁操作器
であり、窒素ガス供給路９から窒素ガスＮ2 を十分な供
給圧力をもってタンク６に加圧供給することに対し、こ
の弁操作器１４は、圧力センサ１３による検出圧力ｐに
基づき排気弁１２を操作（開度調整操作ないし開閉操
作）することで、タンク６の内部圧力ｐを目標圧力ｐｍ
に自動調整する。Reference numeral 12 denotes the discharge of gas from the gas area a in the tank.
An exhaust valve for controlling the output, 13 is a pressure sensor for detecting the internal pressure p of the tank 6, and 14 is a valve operator for the exhaust valve 12, and the tank has a sufficient supply pressure of the nitrogen gas N 2 from the nitrogen gas supply passage 9 to the tank. In contrast to supplying pressure to 6, the valve operating unit 14 operates the exhaust valve 12 based on the pressure p detected by the pressure sensor 13 (opening degree adjusting operation or opening / closing operation), so that the internal pressure p of the tank 6 is increased. Target pressure pm
Automatically adjust to.
【００２６】つまり、水導入路７及び水導出路８を水循
環路１に接続する後述の装備構造において水循環路１に
おける水圧が水導入路７や水導出路８からタンク６にか
かることに対し、十分な供給圧力での窒素ガス供給の下
で、上記の如く排気弁操作をもってタンク内部圧力ｐを
目標圧力ｐｍに調整することにより、水導入路７や水導
出路８からの印加圧力に見合う目標圧力ｐｍのタンク内
気体域ａを安定的に保った装置運転を可能にする。That is, in the equipment structure described later in which the water introduction passage 7 and the water discharge passage 8 are connected to the water circulation passage 1, the water pressure in the water circulation passage 1 is applied from the water introduction passage 7 and the water discharge passage 8 to the tank 6, By adjusting the tank internal pressure p to the target pressure pm by operating the exhaust valve as described above under the nitrogen gas supply at a sufficient supply pressure, the target pressure corresponding to the applied pressure from the water introduction passage 7 and the water discharge passage 8 can be obtained. This makes it possible to operate the apparatus while keeping the gas region a in the tank at the pressure pm stable.
【００２７】なお、１５は窒素ガス発生器、１６はタン
ク６へ窒素ガスＮ2 を供給する状態と供給を停止する状
態との切り換えを行うガス弁、１７はタンク内水位を表
示する水位計、また、ＳＶはタンク６の内部圧力ｐが前
記の目標圧力ｐｍよりも高い所定圧力にまで異常上昇し
たとき自動開動してタンク内部圧力ｐを逃がす安全弁で
ある。Reference numeral 15 is a nitrogen gas generator, 16 is a gas valve for switching between a state in which the nitrogen gas N 2 is supplied to the tank 6 and a state in which the supply is stopped, and 17 is a water level indicator for displaying the water level in the tank. Further, SV is a safety valve that automatically opens to release the tank internal pressure p when the internal pressure p of the tank 6 abnormally rises to a predetermined pressure higher than the target pressure pm.
【００２８】水循環路１に対する溶存酸素除去装置５の
装備構造については、水循環路１のうち負荷装置３から
循環ポンプ４の吸入口に循環水Ｗを戻す返り側配管部分
１ｒに対し前記水導入路７の基端を接続し、また、この
接続箇所よりも循環ポンプ４の吸入口側寄りの箇所で同
じく上記の返り側配管部分１ｒに対し前記水導出路８の
先端を接続し、さらに、これら接続箇所の間で上記の返
り側配管部分１ｒに循環調整弁１８を介装するととも
に、水導入路７に導入弁１９を、かつ、水導出路８に導
出弁２０を介装してある。Regarding the equipment structure of the dissolved oxygen removing device 5 for the water circulation passage 1, the water introduction passage is provided for the return side pipe portion 1r for returning the circulation water W from the load device 3 to the suction port of the circulation pump 4 in the water circulation passage 1. 7 is connected, and the tip of the water outlet passage 8 is connected to the return side pipe portion 1r at a position closer to the suction port side of the circulation pump 4 than this connection point, and A circulation adjusting valve 18 is provided in the return side pipe portion 1r between the connection points, an introducing valve 19 is provided in the water introducing passage 7, and a derivation valve 20 is provided in the water derivating passage 8.
【００２９】つまり、上記の導入弁１９及び導出弁２０
を開いた状態で循環調整弁１８を絞ることにより、水循
環路１における循環水Ｗの一部を水導入路７に分流させ
て前記タンク６に導入し、この分流水Ｗ中の溶存酸素を
タンク内窒素ガスＮ2 との置換により分流水Ｗから分離
除去する。そして、この処理済の分流水Ｗを、引き続き
の上記分流導入に伴いタンク６から水導出路８へ導出し
て、水循環路１の循環水Ｗに再び合流させ、これによ
り、水循環路１での循環運転に伴い密閉式水循環路１に
おける循環水全体の溶存酸素濃度ｄを次第に低下させ
る。That is, the inlet valve 19 and the outlet valve 20 described above.
By squeezing the circulation control valve 18 in the open state, a part of the circulating water W in the water circulating passage 1 is divided into the water introducing passage 7 and introduced into the tank 6, and the dissolved oxygen in the divided water W is stored in the tank. It is separated and removed from the split water W by replacement with the internal nitrogen gas N 2 . Then, this treated split water W is led out from the tank 6 to the water lead-out path 8 along with the introduction of the above-mentioned branch flow, and merged again with the circulating water W of the water circulating path 1, whereby the water in the water circulating path 1 is discharged. With the circulation operation, the dissolved oxygen concentration d of the entire circulating water in the closed water circulation channel 1 is gradually decreased.
【００３０】また、この溶存酸素除去運転により水循環
路１における循環水Ｗの溶存酸素濃度ｄが目標濃度ｄｍ
にまで低下すれば、導入弁１９及び導出弁２０を閉じる
とともに循環調整弁１８を開くことにより、水循環路１
から水導入路７への循環水分流を停止して循環水Ｗに対
する溶存酸素除去運転を停止し、この分流停止状態で密
閉式水循環路１での通常の循環運転を実施する。By this dissolved oxygen removal operation, the dissolved oxygen concentration d of the circulating water W in the water circulation passage 1 is changed to the target concentration dm.
When the water circulation path 1 falls, the inlet valve 19 and the outlet valve 20 are closed and the circulation adjusting valve 18 is opened.
To stop the dissolved oxygen removal operation with respect to the circulating water W, and the normal circulation operation in the closed water circulation path 1 is performed in this split flow stop state.
【００３１】２１は水循環路１における循環水Ｗの溶存
酸素濃度ｄを検出する濃度センサ、２２は濃度センサ２
１の検出濃度ｄに基づき循環調整弁１８、導入弁１９、
及び、導出弁２０を自動操作する切換制御器であり、具
体的弁操作として、この切換制御器２２は、濃度センサ
２１の検出濃度ｄが目標濃度ｄｍよりも高いとき、循環
調整弁１８を絞り状態にするとともに導入弁１９及び導
出弁２０を開き状態にし、かつ、濃度センサ２１の検出
濃度ｄが目標濃度ｄｍ以下のとき、循環調整弁１８を開
き状態にするとともに導入弁１９及び導出弁２０を閉じ
状態にする弁操作を行う。Reference numeral 21 is a concentration sensor for detecting the dissolved oxygen concentration d of the circulating water W in the water circulation passage 1, and 22 is a concentration sensor 2.
The circulation control valve 18, the introduction valve 19, based on the detected concentration d of 1,
Further, it is a switching controller for automatically operating the outlet valve 20, and as a specific valve operation, the switching controller 22 throttles the circulation regulating valve 18 when the detected concentration d of the concentration sensor 21 is higher than the target concentration dm. And the introduction valve 19 and the outlet valve 20 are opened, and when the detected concentration d of the concentration sensor 21 is equal to or lower than the target concentration dm, the circulation adjustment valve 18 is opened and the inlet valve 19 and the outlet valve 20 are opened. Operate the valve to close the.
【００３２】つまり、前述の如く循環水Ｗの一部を水導
入路７に分流させて溶存酸素除去運転を実施すること
と、水導入路７への循環水分流を停止して溶存酸素除去
運転を停止することとの切り換えを、上記の切換制御器
２２により循環水Ｗの溶存酸素濃度検出に基づき自動的
に行うようにしてある。That is, as described above, a part of the circulating water W is diverted to the water introducing passage 7 to carry out the dissolved oxygen removing operation, and the circulating moisture flow to the water introducing passage 7 is stopped to carry out the dissolved oxygen removing operation. The switching between the stop and the stop is automatically performed by the switching controller 22 based on the detection of the dissolved oxygen concentration of the circulating water W.
【００３３】なお、溶存酸素除去運転の停止時には、切
換制御器２２との連係により前記の弁操作器１４が、排
気弁１２を閉弁してタンク内気体域ａからの排気を停止
するとともに、ガス弁１６を閉弁してタンク６への窒素
ガス供給を停止する。When the dissolved oxygen removing operation is stopped, the valve operating unit 14 closes the exhaust valve 12 to stop the exhaust from the gas region a in the tank in cooperation with the switching controller 22. The gas valve 16 is closed to stop the supply of nitrogen gas to the tank 6.
【００３４】図中２３は密閉式の水循環路１に対する密
閉式膨張タンク、２４は同水循環路１に対する水補給路
である。In the figure, reference numeral 23 is a closed expansion tank for the closed water circulation path 1, and 24 is a water supply path for the water circulation path 1.
【００３５】以上、本実施形態においては、弁操作器１
４が、タンク６の内部圧力ｐに応じ排気弁１２を操作し
てタンク６の内部圧力ｐを目標圧力ｐｍに調整する弁操
作手段を構成し、循環調整弁１８、導入弁１９、及び、
導出弁２０が、水循環路１における循環水Ｗの一部を水
導入路７に分流させる流動調整手段を構成し、また、切
換制御器２２が、検出溶存酸素濃度ｄに基づき、循環水
Ｗの一部を水導入路７に分流させる作用状態と分流を停
止する非作用状態とに、上記流動調整手段として各弁１
８，１９，２０を切り換える切換制御手段を構成する。As described above, in the present embodiment, the valve operating device 1
4 constitutes a valve operating means for operating the exhaust valve 12 in accordance with the internal pressure p of the tank 6 to adjust the internal pressure p of the tank 6 to the target pressure pm, and includes a circulation adjustment valve 18, an introduction valve 19, and
The outlet valve 20 constitutes a flow adjusting means for diverting a part of the circulating water W in the water circulating passage 1 to the water introducing passage 7, and the switching controller 22 controls the circulating water W based on the detected dissolved oxygen concentration d. Each valve 1 is used as the above-mentioned flow adjusting means in a working state in which a part of the water is introduced into the water introducing passage 7 and a non-working state in which the dividing is stopped.
A switching control unit for switching 8, 19, and 20 is configured.
【００３６】〔別の実施形態〕
・図２に示す如く、水補給路２４を前記の溶存酸素除去
装置５におけるタンク６に接続するとともに、水導出路
８とは別に、タンク６における処理済水Ｗを水循環路１
に供給する補給水用の水導出路２５を設け、これによ
り、水循環路１における循環水Ｗの一部を水導入路７に
分流させて実施する前述の溶存酸素除去運転は停止した
状態において、水循環路１へ補給水Ｗ’を供給する際、
タンク６の通過過程で補給水Ｗ’中の溶存酸素をタンク
内窒素ガスＮ2 と置換させて補給水Ｗ’から溶存酸素を
除去した上で、この処理済の補給水Ｗ’を補給水用の水
導出路２５から水循環路１に供給するようにしてもよ
い。[Other Embodiments] As shown in FIG. 2, the water supply passage 24 is connected to the tank 6 in the dissolved oxygen removing device 5 and the treated water in the tank 6 is provided separately from the water discharge passage 8. W for water circuit 1
In the state where the above-mentioned dissolved oxygen removal operation that is performed by dividing a part of the circulating water W in the water circulation passage 1 into the water introduction passage 7 is stopped, When supplying makeup water W ′ to the water circulation path 1,
In the process of passing through the tank 6, the dissolved oxygen in the makeup water W'is replaced with the nitrogen gas N 2 in the tank to remove the dissolved oxygen from the makeup water W ', and the treated makeup water W'is used for makeup water. Alternatively, the water may be supplied to the water circulation path 1 from the water outlet path 25.
【００３７】図２において、２６は水補給路２４により
タンク内に供給される補給水Ｗ’をタンク内気体域ａに
対して散水する補給水用の散水管、２７はタンク６で溶
存酸素除去した補給水Ｗ’を水循環路１に対し押し込み
供給する補給水用のポンプ、２８は水循環路１の循環水
Ｗが補給水用の水導出路２５に逆流することを阻止する
一方向弁である。In FIG. 2, 26 is a sprinkling pipe for make-up water for sprinkling the make-up water W'supplied into the tank through the water replenishing passage 24 to the gas region a in the tank, and 27 is a tank 6 for removing dissolved oxygen. A makeup water pump for pushing the supplied makeup water W ′ into the water circulation passage 1, and a one-way valve 28 for preventing the circulation water W in the water circulation passage 1 from flowing backward to the makeup water outlet 25. .
【００３８】なお、上記の図２に示す構成では、水循環
路１の水圧がタンク６にかかることを遮断した状態で、
補給水Ｗ’に対する溶存酸素除去を行うことから、水循
環路１における循環水Ｗの一部を水導入路７へ分流させ
て実施する前述の溶存酸素除去運転の場合とは、窒素ガ
ス供給路９からの窒素ガス供給圧力、及び、排気弁１２
の操作により調整するタンク内部圧力ｐの目標圧力ｐｍ
を異ならせて補給水Ｗ’に対する溶存酸素除去運転を実
施するのがよい。In the structure shown in FIG. 2, the water pressure in the water circulation passage 1 is blocked from being applied to the tank 6,
Since the dissolved oxygen is removed from the makeup water W ′, a part of the circulating water W in the water circulation passage 1 is diverted to the water introduction passage 7 and the case of the dissolved oxygen removal operation described above is different from the nitrogen gas supply passage 9 Nitrogen gas supply pressure from the exhaust valve 12
Target pressure pm of tank internal pressure p adjusted by the operation of
It is advisable to carry out the dissolved oxygen removal operation for the makeup water W'by changing the above.
【００３９】・図３に示す如く、導出弁２０を省略して
水導出路８によりタンク６と水循環路１とを常時連通さ
せ、これにより、導入弁１９の閉弁により水導入路７へ
の循環水分流を停止した状態において、溶存酸素除去装
置における密閉式のタンク６を水循環路１に対する密閉
式膨張タンクに兼用使用するようにしてもよい。As shown in FIG. 3, the water discharge passage 8 is omitted and the tank 6 and the water circulation passage 1 are always communicated with each other, whereby the introduction valve 19 is closed to the water introduction passage 7. The closed tank 6 in the dissolved oxygen removing device may also be used as a closed expansion tank for the water circulation path 1 when the circulating water flow is stopped.
【００４０】また、図３に示す構成では、水補給路２４
をタンク６に接続することにより、補給水Ｗ’をタンク
６で溶存酸素除去した上で常時連通路である水導出路８
から水循環路１に供給する形態を採るが、この場合は、
水循環路１の水圧がタンク６にかかることから、窒素ガ
ス供給路９からの窒素ガス供給圧力、及び、排気弁１２
の操作により調整するタンク内部圧力ｐの目標圧力ｐｍ
として、水循環路１における循環水Ｗの一部を水導入路
７へ分流させて実施する前述の溶存酸素除去運転の場合
と同じ値を採用して、補給水Ｗ’に対する溶存酸素除去
運転を実施するのがよく、場合によっては、循環水Ｗや
補給水Ｗ’に対する溶存酸素除去運転の実施時以外に
も、窒素ガスＮ2 の加圧供給と、排気弁１２の操作によ
るタンク内部圧力ｐの調整とを継続実施する形態を採用
してもよい。Further, in the configuration shown in FIG. 3, the water supply passage 24
Is connected to the tank 6, the makeup water W ′ is removed from the dissolved oxygen in the tank 6, and the water outlet 8 which is a continuous passage is always provided.
From the water supply to the water circuit 1, but in this case,
Since the water pressure in the water circulation path 1 is applied to the tank 6, the nitrogen gas supply pressure from the nitrogen gas supply path 9 and the exhaust valve 12
Target pressure pm of tank internal pressure p adjusted by the operation of
As the above, the same value as in the case of the dissolved oxygen removal operation described above, in which a part of the circulating water W in the water circulation path 1 is branched to the water introduction path 7, is adopted, and the dissolved oxygen removal operation for the makeup water W ′ is performed. In some cases, the nitrogen gas N 2 is supplied under pressure and the tank internal pressure p is adjusted by operating the exhaust valve 12 except when the dissolved oxygen removing operation is performed on the circulating water W or the makeup water W ′. A mode in which the adjustment and the adjustment are continuously performed may be adopted.
【００４１】なお、図３に示す構成において、補給水
Ｗ’を供給する状態と供給を停止する状態との切り換え
は、タンク６の水位検出に基づく補給水弁の自動開閉に
より行う。In the configuration shown in FIG. 3, the state of supplying the supplementary water W'and the state of stopping the supply are performed by automatically opening and closing the supplementary water valve based on the detection of the water level in the tank 6.
【００４２】・前述の実施形態では、水を溶存酸素の除
去対象としたが、本発明は、水に限らず種々の用途の各
種液体を溶存酸素の除去対象とすることができる。In the above-described embodiment, water is the object of removing dissolved oxygen, but the present invention is not limited to water, and various liquids for various purposes can be objects of removing dissolved oxygen.
【００４３】・タンク内気体域ａからの気体排出を制御
する弁１２、及び、この弁１２をタンク６の内部圧力ｐ
に応じ操作してタンク６の内部圧力ｐを目標圧力ｐｍに
調整する弁操作手段は、種々の形式のものを採用でき、
例えば、弁操作手段を弁そのものに一体化した形式とし
て、タンク内部圧力ｐが目標圧力ｐｍ以上になったとき
自動開弁する安全弁の如き弁を採用してもよく、また、
弁操作手段として、タンク６内の液位検出に基づき弁１
２を操作することでタンク内部圧力ｐを目標圧力ｐｍに
調整する形式を採用してもよい。The valve 12 for controlling the gas discharge from the gas region a in the tank, and the valve 12 for controlling the internal pressure p of the tank 6.
Various types of valve operating means for adjusting the internal pressure p of the tank 6 to the target pressure pm by operating in accordance with
For example, a valve operating means may be integrated with the valve itself, and a valve such as a safety valve that automatically opens when the tank internal pressure p becomes equal to or higher than a target pressure pm may be adopted.
As a valve operating means, the valve 1 is based on the detection of the liquid level in the tank 6.
A mode in which the tank internal pressure p is adjusted to the target pressure pm by operating 2 may be adopted.
【００４４】・前述の実施形態では、タンク内気体域ａ
に対し処理対象液Ｗを散布する形式を示したが、タンク
内の液貯留域Ｗに対して窒素ガスＮ2 をバブリングする
形式を採用してもよい。In the above-mentioned embodiment, the tank gas region a
In contrast, the method of spraying the liquid W to be treated is shown, but a method of bubbling nitrogen gas N 2 into the liquid storage area W in the tank may be adopted.
【００４５】・密閉式の液循環路１における循環液Ｗの
一部を液導入路７に分流させる流動調整手段は、前述の
実施形態の如く弁１８，１９，２０により循環液Ｗの流
動状態を調整して循環液Ｗの一部を液導入路７に分流さ
せる形式に限定されるものではなく、例えば、液循環路
７に介装したブースタポンプにより液循環路１における
循環液Ｗの一部を液導入路７に分流させる形式を採用し
てもよく、また、循環液Ｗの一部を液導入路７へ分流さ
せる作用状態と分流を停止させる非作用状態との切り換
え機能を有するものに代え、例えば、前記の循環調整弁
１８の代わりに固定抵抗を液循環路１に設ける等のこと
により、循環液Ｗの一部を液導入路７へ常時分流させる
ものとしてもよい。The flow adjusting means for dividing a part of the circulating liquid W in the closed liquid circulating passage 1 into the liquid introducing passage 7 is the flowing state of the circulating liquid W by the valves 18, 19 and 20 as in the above embodiment. Is not limited to a mode in which a part of the circulating liquid W is divided into the liquid introducing passage 7 by adjusting the above. For example, a part of the circulating liquid W in the liquid circulating passage 1 is increased by a booster pump provided in the liquid circulating passage 7. A part of the circulating fluid W may be split into the liquid introduction passage 7, and a function of switching between a working state in which a part of the circulating liquid W is split into the liquid introduction passage 7 and a non-working state in which the splitting is stopped Alternatively, for example, a fixed resistance may be provided in the liquid circulation passage 1 instead of the circulation adjustment valve 18 so that a part of the circulating liquid W is always diverted to the liquid introduction passage 7.
【００４６】・液循環路１における循環液Ｗの一部を液
導入路７に分流させて溶存酸素除去を実施する状態と、
この分流を停止させて溶存酸素除去を停止する状態との
切り換えを手動操作により行うようにしてもよい。A state in which a part of the circulating liquid W in the liquid circulating passage 1 is diverted to the liquid introducing passage 7 to remove dissolved oxygen,
Switching to a state in which this split flow is stopped and dissolved oxygen removal is stopped may be performed manually.
【００４７】尚、特許請求の範囲の項に図面との対照を
便利にするため符号を記すが、該記入により本発明は添
付図面の構成に限定されるものではない。It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【００４８】[0048]
【発明の効果】・請求項１記載の発明によれば、十分な
供給圧力での窒素ガス供給の下でタンク内の気体域から
の気体の排出を弁により制御してタンク内部圧力を目標
圧力に調整することで、液導入路や液導出路からの印加
圧力に見合う目標圧力のタンク内気体域を安定的に保つ
から、液導入路からタンク内にかかる圧力、及び、液導
出路からタンク内にかかる圧力が高い場合についても、
先述の水封部を用いる従来装置の如き装置の大型化を伴
わずに、タンク内気体域を安定的に保った適切な装置運
転を実施できる。EFFECTS OF THE INVENTION According to the invention of claim 1, from the gas region in the tank under the nitrogen gas supply at a sufficient supply pressure.
By controlling the discharge of the gas in the tank with a valve and adjusting the tank internal pressure to the target pressure, the tank gas region of the target pressure that matches the pressure applied from the liquid introduction path and the liquid discharge path is kept stable. Even when the pressure applied from the introduction path into the tank and the pressure applied from the liquid discharge path into the tank are high,
It is possible to carry out an appropriate apparatus operation in which the gas region in the tank is stably maintained without increasing the size of the apparatus such as the conventional apparatus using the water sealing unit described above.
【００４９】・請求項２記載の発明によれば、請求項１
記載の発明の効果に加え、液中溶存酸素と窒素ガスとの
置換効率の向上により溶存酸素の除去性能を効果的に向
上でき、また、この性能向上により装置の小型化も可能
となる。According to the invention of claim 2, claim 1
In addition to the effects of the invention described above, the efficiency of removing dissolved oxygen can be effectively improved by improving the efficiency of replacement of dissolved oxygen in the liquid with the nitrogen gas, and the performance can be reduced in size.
【００５０】・請求項３記載の発明によれば、密閉タン
ク式の溶存酸素除去装置に要求される単位時間当たりの
処理能力が、液循環路から一部分流した循環液を処理す
るに足りるだけの小さなものとなるから、装備対象であ
る密閉式液循環路の単位時間当たり循環流量が大きい場
合についても、小型な密閉タンク式溶存酸素除去装置で
密閉式液循環路における循環液の溶存酸素濃度を十分に
低下させて配管腐食を効果的に防止できる。According to the third aspect of the invention, the processing capacity per unit time required for the closed tank type dissolved oxygen removing device is sufficient to process the circulating liquid partially flowing from the liquid circulation path. Since the size is small, even when the circulation flow rate per unit time of the sealed liquid circulation path that is the target of equipment is large, the dissolved oxygen concentration of the circulating liquid in the closed liquid circulation path can be adjusted with a small closed tank type dissolved oxygen removal device. It can be sufficiently reduced to effectively prevent pipe corrosion.
【００５１】・請求項４記載の発明によれば、請求項３
記載の発明の効果に加え、液循環路における循環液の溶
存酸素濃度を低下させる必要がないときには、液導入路
への循環液分流を停止することにより、分流のための流
動状態調整で多少なりとも生じる液搬送動力の浪費を回
避した状態で液循環路での液循環運転を実施できて、動
力節減を図ることができ、また、分流の停止に合わせタ
ンクへの窒素ガス供給及びタンク内気体域からの気体排
出も停止させて窒素ガスの浪費も防止できる。According to the invention of claim 4, claim 3
In addition to the effects of the invention described, when it is not necessary to reduce the dissolved oxygen concentration of the circulating liquid in the liquid circulation path, by stopping the circulating liquid branch flow to the liquid introduction path, the flow state adjustment for the branch flow will be somewhat also possible embodiment the liquid circulation operation in the liquid circulation path while avoiding wasting resulting liquid conveying power and, it is possible to achieve power savings, also, a nitrogen gas supply and tank gases into the tank fit to stop shunt Exhaust of gas from the area
It is possible to prevent the waste of nitrogen gas by stopping the discharge .
【００５２】・請求項５記載の発明によれば、請求項４
記載の発明の効果に加え、液循環路における循環液の溶
存酸素濃度を目標濃度に調整維持することを自動的に行
えることにより、管理者負担を軽減でき、また、必要以
上に溶存酸素除去処理を行うことによる窒素ガスの浪費
も確実に防止できる。According to the invention of claim 5, claim 4
In addition to the effects of the invention described, by automatically adjusting and maintaining the dissolved oxygen concentration of the circulating fluid in the liquid circulation path to the target concentration, the burden on the administrator can be reduced, and the dissolved oxygen removal treatment is performed more than necessary. It is possible to reliably prevent waste of nitrogen gas due to performing the above.
【００５３】・請求項６記載の発明によれば、請求項
３、４又は５記載の発明の効果に加え、多量の溶存酸素
を含む補給液を溶存酸素除去処理した上で液循環路に対
して供給するから、液補給にかかわらず液循環路におけ
る循環液の溶存酸素濃度を低く保つことができ、配管腐
食の防止を一層効果的に達成できる。According to the invention described in claim 6, in addition to the effect of the invention described in claim 3, 4 or 5, a supplementary liquid containing a large amount of dissolved oxygen is subjected to a dissolved oxygen removal treatment, and then added to the liquid circulation path. Since it is supplied as a liquid, the dissolved oxygen concentration of the circulating liquid in the liquid circulation path can be kept low regardless of the liquid replenishment, and the pipe corrosion can be prevented more effectively.
【００５４】・請求項７記載の発明によれば、請求項
４、５又は６記載の発明の効果に加え、密閉タンク式溶
存酸素除去装置におけるタンクを液循環路に対する膨張
タンクとして兼用使用することで、別途の専用膨張タン
クを並用する場合に比べ、配管設備の設備コストを低減
し得る。According to the invention of claim 7, in addition to the effect of the invention of claim 4, 5 or 6, the tank in the closed tank type dissolved oxygen removing device is also used as an expansion tank for the liquid circulation path. Therefore, the equipment cost of the piping equipment can be reduced as compared with the case of separately using a dedicated expansion tank.
【図１】装置構成を示す配管図FIG. 1 is a piping diagram showing a device configuration.
【図２】別実施形態を示す配管図FIG. 2 is a piping diagram showing another embodiment.
【図３】他の別実施形態を示す配管図FIG. 3 is a piping diagram showing another embodiment.
６ 密閉式タンク Ｗ 液 ７ 液導入路 ８ 液導出路 ９ 窒素ガス供給路 ａ タンク内気体域 １０ 気体排出路 １２ 弁 ｐ タンク内部圧力 ｐｍ 目標圧力 １４ 弁操作手段 １１ 散布手段 １８，１９，２０ 流動調整手段 ｄ 溶存酸素濃度 ２１ 濃度検出手段 ｄｍ 目標濃度 ２２ 切換制御手段 ２４ 液補給路 6 sealed tanks W liquid 7 liquid introduction path 8 liquid outlet 9 Nitrogen gas supply channel a Gas region in the tank 10 Gas discharge path 12 valves p Tank internal pressure pm target pressure 14 Valve operating means 11 spraying means 18,19,20 Flow adjustment means d Dissolved oxygen concentration 21 Concentration detection means dm target concentration 22 Switching control means 24 liquid supply path
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 19/00 - 19/04 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B01D 19/00-19/04
Claims (7)
ンク内に処理対象液（Ｗ）を導入する液導入路（７）
と、タンク内から処理済液（Ｗ）を導出する液導出路
（８）と、タンク内に窒素ガス（Ｎ2 ）を加圧供給する
窒素ガス供給路（９）と、タンク内の気体域（ａ）から
気体を排出する気体排出路（１０）とを接続した密閉タ
ンク式の溶存酸素除去装置であって、前記タンク内の気体域（ａ）からの気体の排出を制御す
る弁（１２）を前記気体排出路（１０）に設け 、前記タ
ンク（６）の内部圧力（ｐ）に応じ前記弁（１２）を操
作して前記タンク（６）の内部圧力（ｐ）を目標圧力
（ｐｍ）に調整する弁操作手段（１４）を設けた密閉タ
ンク式溶存酸素除去装置。1. A liquid introduction path (7) for introducing a liquid to be treated (W) into a closed tank (6).
A liquid outlet passage (8) for leading out the treated liquid (W) from the tank, a nitrogen gas supply passage (9) for supplying nitrogen gas (N 2 ) into the tank under pressure, and a gas region in the tank. A closed tank type dissolved oxygen removing device connected to a gas discharge path (10) for discharging gas from (a), which controls discharge of gas from a gas region (a) in the tank.
A valve (12) is provided in the gas discharge passage (10), and the valve (12) is operated according to the internal pressure (p) of the tank (6) to adjust the internal pressure (p) of the tank (6). A closed tank type dissolved oxygen removing device provided with a valve operating means (14) for adjusting to a target pressure (pm).
入される導入液（Ｗ）を前記タンク内の気体域（ａ）に
対して散布する散布手段（１１）を設けた請求項１記載
の密閉タンク式溶存酸素除去装置。2. The liquid introducing passage (7) is introduced into the tank.
The introduced liquid (W) to be introduced into the gas region (a) in the tank
Closed tank dissolved oxygen removing device according to claim 1, wherein is provided a spraying means for spraying (11) for.
酸素除去装置を用いた密閉式配管設備であって、 密閉式の液循環路（１）に前記液導入路（７）の基端と
前記液導出路（８）の先端を接続し、前記液循環路
（１）における循環液（Ｗ）の一部を前記液導入路
（７）に分流させる流動調整手段（１８，１９，２０）
を設けた密閉式配管設備。3. A closed pipe facility using the closed tank type dissolved oxygen removing device according to claim 1, wherein a closed end of the liquid introduction passage (7) is provided in a closed liquid circulation passage (1). And a tip of the liquid outlet passage (8) are connected to each other, and a part of the circulating liquid (W) in the liquid circulation passage (1) is diverted to the liquid inlet passage (7). )
Closed piping equipment with
が、前記液循環路（１）における循環液（Ｗ）の一部を
前記液導入路（７）に分流させる作用状態と、この分流
を停止させる非作用状態との切り換え機能を有する手段
である請求項３記載の密閉式配管設備。4. The flow adjusting means (18, 19, 20)
Is a means having a switching function between an operating state in which a part of the circulating liquid (W) in the liquid circulation passage (1) is branched to the liquid introduction passage (7) and a non-operating state in which the division is stopped. The closed pipe facility according to claim 3.
（Ｗ）の溶存酸素濃度（ｄ）を検出する濃度検出手段
（２１）と、この濃度検出手段（２１）の検出濃度
（ｄ）が目標濃度（ｄｍ）よりも高いとき前記流動調整
手段（１８，１９，２０）を作用状態にし、かつ、前記
濃度検出手段（２１）の検出濃度（ｄ）が目標濃度（ｄ
ｍ）以下のとき前記流動調整手段（１８，１９，２０）
を非作用状態にする切換制御手段（２２）を設けた請求
項４記載の密閉式配管設備。5. A concentration detecting means (21) for detecting a dissolved oxygen concentration (d) of the circulating liquid (W) in the liquid circulation path (1) and a detected concentration (d) of this concentration detecting means (21). When it is higher than the target concentration (dm), the flow adjusting means (18, 19, 20) is activated, and the detected concentration (d) of the concentration detecting means (21) is the target concentration (d).
m) The following flow control means (18, 19, 20) when:
The closed pipe facility according to claim 4, further comprising a switching control means (22) for making the inactive state.
接続してある請求項３、４又は５記載の密閉式配管設
備。6. The closed pipe facility according to claim 3, 4 or 5 , wherein a liquid supply passage (24) is connected to the tank (6).
（６）と前記液循環路（１）とを常時連通させる常時連
通路である請求項４、５又は６記載の密閉式配管設備。7. The closed pipe facility according to claim 4, 5 or 6, wherein the liquid outlet passage (8) is a continuous communication passage that always connects the tank (6) and the liquid circulation passage (1). .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19826595A JP3372401B2 (en) | 1995-08-03 | 1995-08-03 | Closed tank type dissolved oxygen removing device and closed piping system using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19826595A JP3372401B2 (en) | 1995-08-03 | 1995-08-03 | Closed tank type dissolved oxygen removing device and closed piping system using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0938409A JPH0938409A (en) | 1997-02-10 |
| JP3372401B2 true JP3372401B2 (en) | 2003-02-04 |
Family
ID=16388267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19826595A Expired - Fee Related JP3372401B2 (en) | 1995-08-03 | 1995-08-03 | Closed tank type dissolved oxygen removing device and closed piping system using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3372401B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007255838A (en) * | 2006-03-24 | 2007-10-04 | Kurita Water Ind Ltd | Boiler device |
| JP6772880B2 (en) * | 2017-02-14 | 2020-10-21 | 三浦工業株式会社 | Water treatment equipment |
| JP2023066654A (en) * | 2021-10-29 | 2023-05-16 | キヤノン株式会社 | Method for producing ultrafine bubble-containing liquid, and apparatus for producing ultrafine bubble |
| CN115869662A (en) * | 2022-01-06 | 2023-03-31 | 中集安瑞科工程科技有限公司 | Defoaming agent mixing and feeding device |
-
1995
- 1995-08-03 JP JP19826595A patent/JP3372401B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0938409A (en) | 1997-02-10 |
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