JPH04343097A - Water quality control device - Google Patents
Water quality control deviceInfo
- Publication number
- JPH04343097A JPH04343097A JP3142615A JP14261591A JPH04343097A JP H04343097 A JPH04343097 A JP H04343097A JP 3142615 A JP3142615 A JP 3142615A JP 14261591 A JP14261591 A JP 14261591A JP H04343097 A JPH04343097 A JP H04343097A
- Authority
- JP
- Japan
- Prior art keywords
- amount
- water
- water supply
- metal oxide
- dissolved oxygen
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000003908 quality control method Methods 0.000 title claims abstract description 13
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 25
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 239000000126 substance Substances 0.000 claims description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 22
- 229910052760 oxygen Inorganic materials 0.000 claims description 22
- 239000001301 oxygen Substances 0.000 claims description 22
- 239000008400 supply water Substances 0.000 claims 1
- 239000003814 drug Substances 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 229940123973 Oxygen scavenger Drugs 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Landscapes
- Control Of Non-Electrical Variables (AREA)
- Flow Control (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は原子力発電プラントにお
ける二次系の水質管理装置に関し、火力発電プラントに
も適用することができる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary water quality control system in a nuclear power plant, and can also be applied to a thermal power plant.
【０００２】0002
【従来の技術】従来の水質管理装置の一例を図３に示す
。図中、１は蒸気発生器、２はタービン、３は復水器、
４はポンプ、５は給水ヒータ、６は薬注タンク、７は薬
注ポンプ、８は制御器、９は流量計を示している。2. Description of the Related Art An example of a conventional water quality control device is shown in FIG. In the figure, 1 is a steam generator, 2 is a turbine, 3 is a condenser,
4 is a pump, 5 is a water supply heater, 6 is a chemical injection tank, 7 is a chemical injection pump, 8 is a controller, and 9 is a flow meter.
【０００３】図３において、蒸気発生器１からの蒸気は
タービン２で仕事をした後に復水器で水となり、ポンプ
４により給水ヒータ５を経て蒸気発生器へ給水される。
この二次系には、その水質管理のための薬品が薬注タン
ク６から薬注ポンプ７により復水器３と蒸気発生器１と
の間、図示の例ではポンプ４と給水ヒータ５との間に注
入されている。この薬注量は、流量計９にて測定した給
水流量信号を取込んだ制御器８にて薬注ポンプ７を制御
することにより、給水流量に比例して制御されている。In FIG. 3, steam from a steam generator 1 performs work in a turbine 2 and then becomes water in a condenser, which is then supplied to the steam generator by a pump 4 via a feed water heater 5. In this secondary system, chemicals for water quality control are transferred from a chemical dosing tank 6 to a dosing pump 7 between a condenser 3 and a steam generator 1, or in the example shown, between a pump 4 and a feed water heater 5. injected in between. This chemical injection amount is controlled in proportion to the water supply flow rate by controlling the chemical injection pump 7 with a controller 8 that receives a water supply flow rate signal measured by a flow meter 9.
【０００４】0004
【発明が解決しようとする課題】上記のように、給水の
水質管理のために、給水に薬品、たとえば給水中の溶存
酸素を除去するためにヒドラジン等の脱酸素剤が又は給
水中に含まれている金属酸化物を還元するためにヒドラ
ジンが注入されており、その薬注量は給水流量に応じて
制御されている。したがって、給水流量が一定ならば、
薬注量も一定となるよう制御される。このため、給水流
量が一定の時に、系外からの空気漏入等により給水中の
溶存酸素が増加した場合、またこれにより給水中の金属
酸化物の量が増加した場合にでも、溶存酸素と反応させ
る又は金属酸化物を還元させるために注入される薬品の
量が一定のままであるので、給水中に応答しない溶存酸
素が残留することになり、また金属酸化物が十分に還元
されないことになる。このような溶存酸素、金属酸化物
はこれらが蒸気発生器まで持ち込まれると、蒸気発生器
の腐食等の要因となるものである。[Problems to be Solved by the Invention] As mentioned above, in order to control the water quality of the water supply, chemicals such as oxygen scavengers such as hydrazine are added to the water supply to remove dissolved oxygen in the water supply. Hydrazine is injected to reduce metal oxides in the tank, and the amount of hydrazine injected is controlled according to the flow rate of the water supply. Therefore, if the water supply flow rate is constant,
The amount of medicine injected is also controlled to be constant. Therefore, when the water supply flow rate is constant, if dissolved oxygen in the water supply increases due to air leakage from outside the system, or even if the amount of metal oxides in the water supply increases due to this, dissolved oxygen and Since the amount of chemicals injected to react or reduce the metal oxides remains constant, unresponsive dissolved oxygen remains in the feed water and the metal oxides are not sufficiently reduced. Become. When such dissolved oxygen and metal oxides are brought into the steam generator, they become a cause of corrosion of the steam generator.
【０００５】本発明は上記事情にかんがみてなされたも
ので、給水中の溶存酸素又は金属酸化物の量を十分に低
減することのできる水質管理装置を提供することを目的
とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water quality control device that can sufficiently reduce the amount of dissolved oxygen or metal oxides in water supply.
【０００６】[0006]
【課題を解決するための手段】上記目的に対し、本発明
によれば、原子力発電プラントにおける二次系に薬品を
注入して給水の水質を管理する装置において、給水中に
含まれている金属酸化物若しくは溶存酸素の量により薬
注量を制御する薬注量制御手段を設けてなる水質管理装
置が提供される。[Means for Solving the Problems] According to the present invention, in a device for controlling the water quality of the water supply by injecting chemicals into the secondary system of a nuclear power plant, metals contained in the water supply are A water quality control device is provided that includes a chemical injection amount control means for controlling the chemical injection amount based on the amount of oxides or dissolved oxygen.
【０００７】[0007]
【作用】上記手段によれば、薬注量制御手段が給水中の
金属酸化物若しくは溶存酸素の量を直接測定し、この量
に応じて金属酸化物の還元又は溶存酸素の脱酸素に必要
な量の薬品を注入するよう制御する。[Operation] According to the above means, the chemical injection amount control means directly measures the amount of metal oxides or dissolved oxygen in the water supply, and according to this amount, the amount necessary for reducing the metal oxides or deoxidizing the dissolved oxygen is determined. Control the amount of medicine injected.
【０００８】[0008]
【実施例】図１は本発明による水質管理装置の一例を示
したもので、図中、図３に示したものと同一の要素には
同一の符号を付してある。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a water quality control system according to the present invention, in which the same elements as those shown in FIG. 3 are designated by the same reference numerals.
【０００９】図１において、蒸気発生器１、タービン２
、復水器３、ポンプ４及び給水ヒータ５からなる二次系
に、薬注タンク６からの薬品を薬注ポンプ７によって注
入するようにしている。この薬注ポンプ７は制御器８及
び電位モニタ装置９から成る薬注量制御手段に接続され
ており、電位モニタ装置は蒸気発生器１への給水からサ
ンプル水１０を採取するように接続されている。サンプ
ル水１０は復水器３から蒸気発生器１に至る間で採取す
るが、図示の例では給水ヒータ５と蒸気発生器１との間
としてある。In FIG. 1, a steam generator 1, a turbine 2
, a chemical injection pump 7 injects chemicals from a chemical injection tank 6 into a secondary system consisting of a condenser 3, a pump 4, and a water heater 5. This chemical injection pump 7 is connected to chemical injection amount control means consisting of a controller 8 and a potential monitor device 9, and the potential monitor device is connected to collect sample water 10 from the water supplied to the steam generator 1. There is. The sample water 10 is sampled between the condenser 3 and the steam generator 1, but in the illustrated example, it is sampled between the feed water heater 5 and the steam generator 1.
【００１０】図１によれば、蒸気発生器１へ供給される
給水からサンプル水１０を採取し、電位モニタ装置９に
て給水中の金属酸化物による電位を測定し、電位モニタ
装置９からの信号を取り込んだ制御器８により、薬注ポ
ンプ７の薬注量を制御する。According to FIG. 1, a sample water 10 is collected from the feed water supplied to the steam generator 1, the potential due to metal oxides in the feed water is measured by the potential monitor device 9, and the potential from the potential monitor device 9 is measured. The amount of medicine injected by the medicine injection pump 7 is controlled by the controller 8 that receives the signal.
【００１１】給水中の金属酸化物の量と金属酸化物によ
る電位との間には相関関係があり、給水中の金属酸化物
の量が増加すると電位が高く、金属酸化物の量が減少す
ると電位が低くなる。したがって、電位を測定すること
により給水中の金属酸化物の量を検出することができる
のである。電位モニタ装置９によって測定された電位、
すなわち給水中の金属酸化物の量を表す信号は制御器８
に送られる。制御器８は金属酸化物の量から金属酸化物
を還元するのに必要な薬品の注入量を定め、その注入量
となるよう薬注ポンプ７を制御する。[0011] There is a correlation between the amount of metal oxide in the feed water and the potential due to the metal oxide; as the amount of metal oxide in the feed water increases, the potential increases, and as the amount of metal oxide decreases, the potential increases. Potential becomes lower. Therefore, by measuring the potential, it is possible to detect the amount of metal oxide in the water supply. the potential measured by the potential monitor device 9;
That is, the signal representing the amount of metal oxide in the water supply is sent to the controller 8.
sent to. The controller 8 determines the injection amount of the chemical necessary to reduce the metal oxide based on the amount of the metal oxide, and controls the chemical injection pump 7 to achieve the injection amount.
【００１２】図２は本発明による水質管理装置の他の例
を示したもので、図中、図１に示したものと同一の要素
には同一の符号を付してそれらの説明は省略する。FIG. 2 shows another example of the water quality control device according to the present invention, and in the figure, the same elements as those shown in FIG. .
【００１３】図２において、薬注量制御手段は給水から
のサンプル水１０を採取して給水中の溶存酸素の量を測
定する溶存酸素測定装置１１と制御器８とによって構成
され、薬注ポンプ７を制御するよう接続されている。サ
ンプル水１０は復水器３から蒸気発生器１に至る間で採
取するが、図示の例のように蒸気発生器１と給水ヒータ
５との間や、給水ヒータ５とポンプ４との間又はポンプ
４と復水器３との間でもよい。In FIG. 2, the chemical injection amount control means is composed of a dissolved oxygen measuring device 11 that collects sample water 10 from the water supply and measures the amount of dissolved oxygen in the water supply, and a controller 8, and a chemical injection pump. 7. The sample water 10 is collected between the condenser 3 and the steam generator 1, but as shown in the example, between the steam generator 1 and the water heater 5, between the water heater 5 and the pump 4, or between the water heater 5 and the pump 4. It may be between the pump 4 and the condenser 3.
【００１４】上記構成において、蒸気発生器１へ供給さ
れる給水からのサンプル水１０を採取し、溶存酸素測定
装置１１にて給水中の溶存酸素の量を測定し、溶存酸素
測定装置からの信号を取り込んだ制御器８により薬注ポ
ンプ７の薬注量を制御する。このようにして、給水中に
含まれる溶存酸素の量に応じて、その溶存酸素と反応す
るのに必要な量の薬品、すなわち脱酸素剤が注入される
ことになる。In the above configuration, sample water 10 is collected from the feed water supplied to the steam generator 1, the amount of dissolved oxygen in the feed water is measured by the dissolved oxygen measuring device 11, and the signal from the dissolved oxygen measuring device is The amount of medicine injected by the medicine injection pump 7 is controlled by the controller 8 that incorporates the information. In this way, depending on the amount of dissolved oxygen contained in the feed water, the amount of chemical, ie, oxygen scavenger, required to react with the dissolved oxygen will be injected.
【００１５】[0015]
【発明の効果】以上の説明から明らかなように、本発明
によれば、給水中に含まれている金属酸化物若しくは溶
存酸素の量に応じた薬注量の制御が可能となり、給水流
量が一定の時に給水中の金属酸化物若しくは溶存酸素の
量が増加しても、金属酸化物を還元するため又は溶存酸
素と反応するために必要な薬注量の増加制御が可能とな
るので、蒸気発生器へ持ち込まれる金属酸化物若しくは
溶存酸素の量を低減することができ、蒸気発生器の腐食
防止等に貢献することができる。[Effects of the Invention] As is clear from the above explanation, according to the present invention, the amount of chemical injection can be controlled according to the amount of metal oxide or dissolved oxygen contained in the water supply, and the flow rate of the water supply can be controlled. Even if the amount of metal oxides or dissolved oxygen in the water supply increases at a certain time, it is possible to control the increase in the amount of chemical injection required to reduce the metal oxides or react with dissolved oxygen. The amount of metal oxides or dissolved oxygen brought into the generator can be reduced, and this can contribute to preventing corrosion of the steam generator.
【図１】本発明による水質管理装置を例示した系統図で
ある。FIG. 1 is a system diagram illustrating a water quality control device according to the present invention.
【図２】本発明による他の水質管理装置を例示した系統
図である。FIG. 2 is a system diagram illustrating another water quality control device according to the present invention.
【図３】従来の水質管理装置を例示した系統図である。FIG. 3 is a system diagram illustrating a conventional water quality control device.
１ 蒸気発生器 ２ タービン ３ 復水器 ４ ポンプ ５ 給水ヒータ ６ 薬注タンク ７ 薬注ポンプ ８ 制御器 ９ 電位モニタ装置 １０ サンプル水 １１ 溶存酸素測定装置 1 Steam generator 2 Turbine 3 Condenser 4 Pump 5 Water supply heater 6 Medication tank 7 Medication pump 8 Controller 9 Potential monitoring device 10 Sample water 11 Dissolved oxygen measuring device
Claims (1)
を注入して給水の水質を管理する装置において、給水中
に含まれている金属酸化物若しくは溶存酸素の量により
薬注量を制御する薬注量制御手段を設けてなる水質管理
装置。Claim 1: A device for controlling the quality of water supply water by injecting chemicals into the secondary system of a nuclear power plant, which controls the amount of chemical injection based on the amount of metal oxides or dissolved oxygen contained in the water supply. A water quality control device equipped with an injection amount control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142615A JPH04343097A (en) | 1991-05-20 | 1991-05-20 | Water quality control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142615A JPH04343097A (en) | 1991-05-20 | 1991-05-20 | Water quality control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04343097A true JPH04343097A (en) | 1992-11-30 |
Family
ID=15319453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3142615A Withdrawn JPH04343097A (en) | 1991-05-20 | 1991-05-20 | Water quality control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04343097A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ299757B6 (en) * | 2006-12-20 | 2008-11-12 | Ústav jaderného výzkumu Rež, a.s. | Apparatus for determining and monitoring composition of thickened solutions and sediments in structural joints with heat flow and located in track of feed water of power device steam generators, such as thermal or nuclear power stations |
-
1991
- 1991-05-20 JP JP3142615A patent/JPH04343097A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ299757B6 (en) * | 2006-12-20 | 2008-11-12 | Ústav jaderného výzkumu Rež, a.s. | Apparatus for determining and monitoring composition of thickened solutions and sediments in structural joints with heat flow and located in track of feed water of power device steam generators, such as thermal or nuclear power stations |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7676017B2 (en) | Vacuum actuated anhydrous ammonia feed system for pH adjustment of boiler condensate/feed water | |
| JPH04343097A (en) | Water quality control device | |
| JP2003185787A (en) | Method for preventing corrosion of structural member for liquid metal coolant | |
| US5467375A (en) | Gas injection system of nuclear power plant and gas injection method therefor | |
| JP3135385B2 (en) | Nuclear plant water quality improvement equipment | |
| KR840002373B1 (en) | Wide range noble gas radiation monjtor | |
| JPS6319838B2 (en) | ||
| JP3354299B2 (en) | Automatic high-pressure and high-pressure sample water supply system | |
| JP2002039987A (en) | Method for measuring concentration of oxygen dissolved in liquid metal | |
| JPH06167596A (en) | Corrosion suppression method and device for reactor primary system structure material | |
| JPH05209991A (en) | Contamination prevention method for reactor piping | |
| JPH04127595U (en) | Nuclear power plant chemical injection control device | |
| JPH0636066B2 (en) | Method and apparatus for producing anticorrosion coating for nuclear power plant | |
| EP0744612A1 (en) | Oxygen analyzer | |
| JP2511949B2 (en) | Turbine bearing oil temperature control device | |
| JP2001021101A (en) | Corrosion proofing method of heat recovery equipment and apparatus therefor | |
| JPS6311896A (en) | Nuclear reactor stoppage operation control method | |
| JPS6371696A (en) | Concentrator for radioactive waste liquor | |
| JPH1090484A (en) | Hydrogen/oxygen injection system of boiling water reactor plant | |
| JP3250146B2 (en) | Boiling water nuclear power plant | |
| JPS61230094A (en) | Controller for radioactivity of nuclear power plant | |
| JP3106008B2 (en) | Condensate supply equipment | |
| JPH1026307A (en) | Method of controlling chemicals feeding for boiler | |
| JPS6298103A (en) | Controller for dissolved oxygen | |
| JPH0198998A (en) | Controller for water quality of condensate/feed water system of reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980806 |