JPH04296652A - Method for controlling concentration of chemicals added to water - Google Patents
Method for controlling concentration of chemicals added to waterInfo
- Publication number
- JPH04296652A JPH04296652A JP8611691A JP8611691A JPH04296652A JP H04296652 A JPH04296652 A JP H04296652A JP 8611691 A JP8611691 A JP 8611691A JP 8611691 A JP8611691 A JP 8611691A JP H04296652 A JPH04296652 A JP H04296652A
- Authority
- JP
- Japan
- Prior art keywords
- water
- concentration
- chemicals
- potassium
- potassium ion
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000000126 substance Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 150000003112 potassium compounds Chemical class 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims 3
- 230000000996 additive effect Effects 0.000 claims 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 229910001414 potassium ion Inorganic materials 0.000 abstract description 18
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract description 15
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 abstract description 15
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 abstract description 4
- 239000008234 soft water Substances 0.000 abstract 4
- 239000003518 caustics Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000012459 cleaning agent Substances 0.000 description 9
- 239000001488 sodium phosphate Substances 0.000 description 5
- 229910000162 sodium phosphate Inorganic materials 0.000 description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229940085991 phosphate ion Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- RECVMTHOQWMYFX-UHFFFAOYSA-N oxygen(1+) dihydride Chemical compound [OH2+] RECVMTHOQWMYFX-UHFFFAOYSA-N 0.000 description 1
- ATGAWOHQWWULNK-UHFFFAOYSA-I pentapotassium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [K+].[K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O ATGAWOHQWWULNK-UHFFFAOYSA-I 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はボイラ水として使用する
軟化水又は純水中に、防食やスケールの発生防止のため
に添加する薬品の濃度を知りこれを管理する方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of knowing and controlling the concentration of chemicals added to softened water or pure water used as boiler water for corrosion protection and prevention of scale formation.
【０００２】0002
【従来の技術及び発明が解決しようとする課題】周知の
ように軟化水または純水を使用する装置、特にボイラ系
において、不純物による障害を回避し、装置を効率的に
運転するために、防食剤、スケール防止剤等の、各種薬
品が添加されている。そこで、これら薬品の濃度管理を
するために、各薬品を迅速に測定する必要がある。[Prior Art and Problems to be Solved by the Invention] As is well known, in equipment that uses softened water or pure water, especially boiler systems, corrosion protection is required to avoid problems caused by impurities and to operate the equipment efficiently. Various chemicals such as anti-scaling agents and anti-scaling agents are added. Therefore, in order to control the concentration of these chemicals, it is necessary to quickly measure each chemical.
【０００３】しかしながら、測定方法は薬品によって、
確立していないものがあり、もしくは測定できるものの
中には操作が煩雑であったり時間の要するものがある。
最近トレーサーを用いて薬品の濃度管理をする方法が提
案されているが、トレーサーにより用水が着色されたり
（トレーサーとして染料を用いる場合）、測定装置が高
価であったり、またその場で迅速に測定できない等の欠
点がある。[0003] However, the measurement method depends on chemicals.
There are some things that have not been established, or some things that can be measured are complicated or time-consuming to operate. Recently, methods have been proposed for controlling the concentration of chemicals using tracers, but the tracers may color the water (if dyes are used as the tracer), the measuring equipment is expensive, and the measurement cannot be performed quickly on the spot. There are drawbacks such as not being able to do so.
【０００４】0004
【課題を解決するための手段】本発明はこれに鑑み種々
検討の結果、迅速かつ簡単な手段で薬品濃度を測定し、
これを管理する方法を提供するものである。[Means for Solving the Problems] In view of this, as a result of various studies, the present invention measures drug concentration by quick and simple means,
It provides a way to manage this.
【０００５】即ち本発明は、軟化水又は純水中の添加薬
品の濃度を管理するにあたり、薬品に所定の濃度で水溶
性カリウム化合物を混合してこれを軟化水又は純水中に
添加し、水中のカリウムイオン濃度を測定することによ
り添加薬品の濃度を管理することを特徴とするものであ
る。That is, in controlling the concentration of added chemicals in softened water or pure water, the present invention mixes a water-soluble potassium compound with the chemicals at a predetermined concentration and adds this to the softened water or pure water, This method is characterized by controlling the concentration of added chemicals by measuring the potassium ion concentration in water.
【０００６】[0006]
【作用】上記水溶性カリウム化合物は、防食剤、スケー
ル防止剤等、各種薬品の１種又は２種以上を混合した薬
品に ０．１〜２０重量％範囲で混合すればよく、この
混合液を例えばボイラ水中に添加しボイラ水中のカリウ
ムイオン濃度を測定してその配合比率から計算すること
により添加薬品の濃度を知ることができる。[Function] The above water-soluble potassium compound may be mixed in a range of 0.1 to 20% by weight with a mixture of one or more of various chemicals such as anticorrosive agents and scale inhibitors. For example, the concentration of the added chemical can be determined by adding it to boiler water, measuring the potassium ion concentration in the boiler water, and calculating from the mixing ratio.
【０００７】なお、軟化水を使用する場合は、該軟化水
中にもともと含まれているカリウムイオンの濃度とボイ
ラの濃縮倍率とを掛け合わせることによってボイラ水中
における該軟化水由来のカリウムイオン量を求め、この
分をボイラ水中の総カリウムイオン量から差し引いた値
と配合比率により添加薬品を算出する。[0007] When using softened water, the amount of potassium ions derived from the softened water in the boiler water is determined by multiplying the concentration of potassium ions originally contained in the softened water by the boiler concentration ratio. The amount of added chemicals is calculated by subtracting this amount from the total amount of potassium ions in the boiler water and the blending ratio.
【０００８】使用する水溶性カリウム化合物は水酸化カ
リウム、炭酸カリウム、第三りん酸カリウム等が挙げら
れる。The water-soluble potassium compounds used include potassium hydroxide, potassium carbonate, and potassium triphosphate.
【０００９】また測定方法としては、イオン選択電極法
、吸光光度法、原子吸光等があり、中でも迅速且つ簡単
な方法として、イオン選択電極法が最も好ましい。[0009] Measuring methods include ion selective electrode method, spectrophotometric method, atomic absorption, etc. Among them, the ion selective electrode method is most preferred as it is quick and simple.
【００１０】0010
【実施例】次に本発明の実施例について説明する。
（参考例）リン酸ナトリウム１０重量％（以下単に％と
記す）、水酸化カリウム５％及び水８５％の割合で混合
した混合液を下記のボイラ水中に加え、該ボイラ水中の
リン酸ナトリウムの濃度を ５００ｍｇ／ｌとなるよう
にした。[Example] Next, an example of the present invention will be described. (Reference example) A mixed solution of 10% by weight of sodium phosphate (hereinafter simply referred to as %), 5% of potassium hydroxide, and 85% of water is added to the boiler water shown below, and the sodium phosphate in the boiler water is The concentration was adjusted to 500 mg/l.
【００１１】試験水 ：軟化水
受験装置：小型実験ボイラ
蒸発量 ３リットル／ｈｒ 圧
力 １ＭＰａ保有水量 ７リットル
温 度 １８３℃ブロー率
４〜６％
実験期間：７日間Test water: Softened water Test equipment: Small experimental boiler Evaporation amount: 3 liters/hr Pressure
Power: 1MPa Water capacity: 7 liters
Temperature: 183℃ Blow rate
4-6% Experiment period: 7 days
【００１２】このボイラ水について実験期間経過後、リ
ン酸イオン濃度及びカリウムイオン濃度をそれぞれ測定
し、これらの濃度からボイラ水中のリン酸ナトリウムの
濃度を算出し、両者を比較して表１に示す。[0012] After the experiment period had passed, the phosphate ion concentration and potassium ion concentration of this boiler water were measured, and the concentration of sodium phosphate in the boiler water was calculated from these concentrations, and the results were compared and shown in Table 1. .
【００１３】[0013]
【表１】[Table 1]
【００１４】表１からカリウムイオン濃度から算出した
リン酸ナトリウム濃度、リン酸イオンから算出したリン
酸ナトリウム濃度は同程度であり、カリウムイオンを用
いて添加薬品の濃度管理が可能であることが判る。[0014] From Table 1, it can be seen that the sodium phosphate concentration calculated from the potassium ion concentration and the sodium phosphate concentration calculated from the phosphate ion are comparable, and it is possible to control the concentration of added chemicals using potassium ion. .
【００１５】（実施例）下記仕様の低圧ボイラを用い、
そのボイラ水に水酸化カリウムを含む非りん系清缶剤（
タンニン５％、アクリル酸ポリマー５％、水酸化カリウ
ム５％、水８５％）の混合液を連続的に注入し、カリウ
ムイオン濃度をイオン選択電極を用いて測定することに
より清缶剤成分の濃度管理を行った。なお清缶剤混合液
の注入に際しては、清缶剤成分が補給ボイラ水に対して
２５ｍｇ／ｌの濃度で正確に添加できるように一定流量
で注入できる定量ポンプを用いた。(Example) Using a low pressure boiler with the following specifications,
A non-phosphorous can cleaning agent containing potassium hydroxide is added to the boiler water (
Concentrations of can cleaner components were determined by continuously injecting a mixture of 5% tannin, 5% acrylic acid polymer, 5% potassium hydroxide, and 85% water, and measuring the potassium ion concentration using an ion-selective electrode. managed. When injecting the can cleaning agent mixture, a metering pump capable of injecting the can cleaning agent mixture at a constant flow rate was used so that the can cleaning agent component could be accurately added to the make-up boiler water at a concentration of 25 mg/l.
【００１６】ボイラ仕様
補給水：軟化水
装 置：炉筒煙管
蒸発量 ３．５ｍ３ ／ｈｒ 常用
圧力 ０．７５ ＭＰａブロー率 ４〜６％[0016] Boiler specifications Make-up water: Softening water device: Furnace pipe evaporation amount 3.5 m3 /hr Normal pressure 0.75 MPa Blow rate 4-6%
【００１７】そして表２に示すように検水サンプル毎に
清缶剤成分の濃縮倍率（＝ボイラ水中の塩化物イオン／
軟化水中の塩化物イオン）を求め、これから計算した清
缶剤成分濃度の計算値（＝濃縮倍率×２５（ｍｇ／ｌ）
）と、カリウムイオン濃度の測定値から算出したボイラ
水中の清缶剤成分の濃度を比較して表２に併記した。As shown in Table 2, the concentration ratio of the can cleaning agent component (=chloride ion in boiler water/
chloride ion in the softened water) and calculated the concentration of the can cleaning agent component from this (=concentration ratio x 25 (mg/l)
) and the concentration of the can cleaning agent component in the boiler water calculated from the measured value of potassium ion concentration are compared and are also listed in Table 2.
【００１８】[0018]
【表２】[Table 2]
【００１９】表２から本発明法に係るカリウムイオン濃
度の測定値から算出したボイラ水中の清缶剤成分濃度は
、補給水に対する清缶剤の注入量（２５ｍｇ／ｌ）と濃
縮倍率とから計算した清缶剤成分濃度にほぼ一致してお
り、カリウムイオン濃度を測定することにより清缶剤成
分の濃度管理が十分行えることが判る。[0019] From Table 2, the concentration of the can cleaning agent component in the boiler water calculated from the measured value of the potassium ion concentration according to the method of the present invention is calculated from the injection amount (25 mg/l) of the can cleaning agent to the make-up water and the concentration ratio. It is found that the concentration of can cleaner ingredients can be adequately controlled by measuring the potassium ion concentration.
【００２０】[0020]
【発明の効果】このように本発明によれば、短時間でか
つ簡単に軟化水又は純水中への添加薬品の濃度を管理す
ることができる効果を有する。As described above, the present invention has the effect that the concentration of chemicals added to softened water or pure water can be easily controlled in a short time.
Claims (1)
管理するにあたり、薬品に所定の濃度で水溶性カリウム
化合物を混合してこれを軟化水又は純水中に添加し、水
中のカリウムイオン濃度を測定することにより添加薬品
の濃度を管理することを特徴とする用水中の添加薬品の
濃度管理方法。Claim 1: To control the concentration of additive chemicals in softened water or pure water, a water-soluble potassium compound is mixed with the chemicals at a predetermined concentration and added to the softened water or pure water to control the concentration of potassium in the water. A method for controlling the concentration of additive chemicals in water, the method comprising controlling the concentration of additive chemicals by measuring ion concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8611691A JP2788355B2 (en) | 1991-03-26 | 1991-03-26 | How to control the concentration of added chemicals in service water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8611691A JP2788355B2 (en) | 1991-03-26 | 1991-03-26 | How to control the concentration of added chemicals in service water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04296652A true JPH04296652A (en) | 1992-10-21 |
| JP2788355B2 JP2788355B2 (en) | 1998-08-20 |
Family
ID=13877729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8611691A Expired - Lifetime JP2788355B2 (en) | 1991-03-26 | 1991-03-26 | How to control the concentration of added chemicals in service water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2788355B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004004045A (en) * | 2002-04-23 | 2004-01-08 | Japan Organo Co Ltd | Concentration managing method and concentration management device of chemical for water treatment |
| US7105095B2 (en) | 2003-04-17 | 2006-09-12 | Organo Corporation | Method and apparatus for controlling concentration of water treatment chemicals |
| JP2019065357A (en) * | 2017-10-02 | 2019-04-25 | 三浦工業株式会社 | Water treatment agent and corrosion inhibition method of boiler water pipe |
| CN114910531A (en) * | 2022-04-07 | 2022-08-16 | 浙江西热利华智能传感技术有限公司 | Chloride ion sensor-based concentration ratio online detection system and detection method |
-
1991
- 1991-03-26 JP JP8611691A patent/JP2788355B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004004045A (en) * | 2002-04-23 | 2004-01-08 | Japan Organo Co Ltd | Concentration managing method and concentration management device of chemical for water treatment |
| US7105095B2 (en) | 2003-04-17 | 2006-09-12 | Organo Corporation | Method and apparatus for controlling concentration of water treatment chemicals |
| JP2019065357A (en) * | 2017-10-02 | 2019-04-25 | 三浦工業株式会社 | Water treatment agent and corrosion inhibition method of boiler water pipe |
| CN114910531A (en) * | 2022-04-07 | 2022-08-16 | 浙江西热利华智能传感技术有限公司 | Chloride ion sensor-based concentration ratio online detection system and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2788355B2 (en) | 1998-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RVTR | Cancellation due to determination of trial for invalidation |