JP2006097963A - Carry-over monitoring method and monitoring device - Google Patents
Carry-over monitoring method and monitoring device Download PDFInfo
- Publication number
- JP2006097963A JP2006097963A JP2004283958A JP2004283958A JP2006097963A JP 2006097963 A JP2006097963 A JP 2006097963A JP 2004283958 A JP2004283958 A JP 2004283958A JP 2004283958 A JP2004283958 A JP 2004283958A JP 2006097963 A JP2006097963 A JP 2006097963A
- Authority
- JP
- Japan
- Prior art keywords
- meter
- over
- carry
- electric conductivity
- steam
- 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.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
本発明は、ボイラが発生する蒸気を他の機関に熱源として供給したり、食品等の生産物に直接噴霧して加工するための蒸気に関し、特に蒸気中に不純物が混入して他の機関や加工食品に悪影響を与えるキャリーオーバーを検出することのできるキャリーオーバー監視方法及び監視装置に関するものである。 The present invention relates to steam for supplying steam generated by a boiler to other engines as a heat source, or for directly spraying and processing products such as foods. The present invention relates to a carryover monitoring method and a monitoring apparatus capable of detecting a carryover that adversely affects processed food.
一般に、ボイラから発生する蒸気中にボイラ水そのものが混入する現象は、キャリーオーバーといわれており、従来から問題になっている。ボイラ水はアルカリ性に保たれているところからキャリーオーバーした蒸気は、アルカリ性を示すようになる。従来は、このキャリーオーバーの検出には、現場の知識としてｐＨ計が使用されていた。
特に、小型貫流ボイラにおいては、最大給水量に対する循環水量の比が２以下であり、ボイラ効率が極めて高い故にキャリーオーバーが発生し易いという問題があった。
Generally, the phenomenon in which boiler water itself is mixed into steam generated from a boiler is called carry-over, and has been a problem in the past. Steam that has carried over from where the boiler water is kept alkaline will show alkalinity. Conventionally, a pH meter has been used as on-site knowledge to detect this carryover.
In particular, in a small once-through boiler, the ratio of the circulating water amount to the maximum water supply amount is 2 or less, and the boiler efficiency is extremely high, so that carryover is likely to occur.
類似技術が、特開２０００−２８１０７号公報等に開示されている。この発明は、ボイラ復水をイオン交換樹脂で脱塩処理した後、復水の電気伝導率を測定して、ボイラ用補給水として使用可能かどうかを監視する技術である。 A similar technique is disclosed in Japanese Patent Application Laid-Open No. 2000-28107. The present invention is a technique for monitoring whether or not a boiler condensate can be used as boiler replenishment water by measuring the electrical conductivity of the condensate after desalinating with a ion exchange resin.
しかし、特開２０００−２８１０７号公報に開示された発明は、得られた復水が、単にボイラの補給水として使用可能か否かを判断するものであり、キャリーオーバーの存在を検出するものではない。 However, the invention disclosed in Japanese Patent Laid-Open No. 2000-28107 merely determines whether or not the obtained condensate can be used as boiler makeup water, and does not detect the presence of carryover. Absent.
前記目的を達成するために、請求項１に記載の発明は、蒸気の一部を熱交換器で復水した後、ｐＨ計及び電気伝導度計によってｐＨ値及び電気伝導度を測定し、その測定値の変化によりキャリーオーバーを監視することを特徴としている。 In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that after a part of the steam is condensed by a heat exchanger, the pH value and the electric conductivity are measured by a pH meter and an electric conductivity meter. It is characterized by monitoring carry-over according to changes in measured values.
また、請求項２に記載の発明において、前記ｐＨ計及び電気伝導度計による測定を同時に行うことを特徴とするものである。 The invention according to claim 2 is characterized in that the measurement by the pH meter and the electric conductivity meter is performed simultaneously.
また、請求項３に記載の発明において、蒸気の一部を熱交換器で復水した後、ｐＨ計及び電気伝導度計によってｐＨ値及び電気伝導度を測定し、その測定値の変化によりキャリーオーバーを監視するキャリーオーバー監視装置であって、前記ｐＨ計と電気伝導度計とを一体的に構成したことを特徴とするキャリーオーバー監視装置に関するものである。 Further, in the invention according to claim 3, after condensing a part of the steam with a heat exchanger, the pH value and the electric conductivity are measured by a pH meter and an electric conductivity meter. The present invention relates to a carry-over monitoring device for monitoring over, wherein the pH meter and the electrical conductivity meter are integrally formed.
この発明は前記した構成からなるので、以下に説明するような効果を奏することができる。 Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.
本発明では、蒸気の一部を熱交換器で復水した後、ｐＨ計及び電気伝導度計によってｐＨ値及び電気伝導度を測定し、その測定値の変化によりキャリーオーバーを監視するので、キャリーオーバーの存在を正確に監視することができる。 In the present invention, after condensing a part of the steam with a heat exchanger, the pH value and the electric conductivity are measured by the pH meter and the electric conductivity meter, and the carry over is monitored by the change in the measured value. The presence of over can be accurately monitored.
また、本発明において、前記ｐＨ計及び電気伝導度計による測定を同時に行うので、より確実にキャリーオーバーを検出することができる。 In the present invention, since the measurement with the pH meter and the electrical conductivity meter is performed simultaneously, carryover can be detected more reliably.
また、本発明のキャリーオーバー監視装置は、前記ｐＨ計と電気伝導度計とが一体的に構成されたので、復水のｐＨ変化、電気伝導度の変化を同時に測定して、正確にキャリーオーバーの存在を推定することができる。 In addition, since the pH meter and the electrical conductivity meter are integrally configured, the carry-over monitoring device of the present invention measures the pH change of the condensate and the electrical conductivity at the same time, and accurately carries it over. Can be estimated.
本発明の最良の形態、図面に基づいて本発明を詳細に説明する。図１は、本発明に係るキャリーオーバー監視方法の一例を示す構成図である。まず、図外の蒸気発生部（ボイラー）で発生した蒸気をボイラーヘッダー１１を介して一部がスチームコロージョンモニタ１２で蒸気の腐食性をモニターした後、熱交換器１３で冷却して復水に戻す。その復水を電気伝導度計１５及びｐＨ計１６にて測定し、それぞれの測定値の変化によりキャリーオーバーを監視するものである。測定は、連続的でもよいし、間欠的でもよい。本発明においては、キャリーオーバーの存在を電気伝導度計とｐＨ計とを同時に用いて測定するため、より正確にキャリーオーバーを監視することができる。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail based on the best mode of the present invention and drawings. FIG. 1 is a block diagram showing an example of a carryover monitoring method according to the present invention. First, steam generated in a steam generation section (boiler) (not shown) is partially monitored for steam corrosiveness with a
次に、小型貫流ボイラを使って食品プロセス用蒸気を２年間発生させている場所で本発明を実施した。
発生蒸気の一部をバイパス管で取り出し、熱交換器を用いて冷却して復水に戻した後、堀場製作所製計測器Ｕ−２２ＸＰを用いて常時水質を計測した。
なお、この計器には、ｐＨ計、電気伝導度計が装備されている。計測を連続的に行った結果、ｐＨ値は大部分が４．９９〜５．５０（正常値）の範囲内であったが、時々それ以上の８．２６〜１０．０（異常値）を示す時があった。また、電気伝導度は、大部分が０〜２０ｍＳ／ｍ（正常値）の範囲内であったが、時々それ以上の４０〜８０ｍＳ／ｍ（異常値）を示す時があった。両者のデータを突き合わせると、ｐＨ値と電気伝導度が同時に異常値を示す回数を見ると、１日平均４回の発生を見た。これにより、この小型貫流ボイラからのキャリーオーバーが１日平均４回発生していると推定された。そこで、ブロー量を若干増やして運転して、同様の測定を行ったところ、ｐＨ値と電気伝導度が同時に異常値を示す回数が１日平均１．５回に減少することが分かった。
Next, the present invention was implemented in a place where steam for food processing was generated for two years using a small once-through boiler.
A part of the generated steam was taken out by a bypass pipe, cooled using a heat exchanger and returned to condensate, and then the water quality was constantly measured using a measuring instrument U-22XP manufactured by Horiba.
This meter is equipped with a pH meter and an electric conductivity meter. As a result of continuous measurement, the pH value was mostly in the range of 4.99 to 5.50 (normal value), but sometimes more than 8.26 to 10.0 (abnormal value). There was a time to show. In addition, the electric conductivity was mostly in the range of 0 to 20 mS / m (normal value), but sometimes sometimes showed an even higher value of 40 to 80 mS / m (abnormal value). When both data were compared, when the number of times that the pH value and the electrical conductivity showed an abnormal value at the same time was observed, it was observed that the occurrence occurred four times a day on average. As a result, it was estimated that carry-over from this small once-through boiler occurred four times a day on average. Therefore, when the same measurement was performed by operating with a slightly increased blow amount, it was found that the number of times that the pH value and the electrical conductivity showed an abnormal value simultaneously decreased to 1.5 times on average per day.
このように本発明では、ｐＨ値、電気伝導度を合わせて測定するので、キャリーオーバーをより正確に監視することができた。 As described above, in the present invention, since the pH value and the electric conductivity are measured together, the carryover can be monitored more accurately.
１１ ボイラーヘッダー
１２ スチームコロージョンモニタ
１３ 熱交換器
１５ 電気伝導度計
１６ ｐＨ計
11
Claims (3)
その測定値の変化によりキャリーオーバーを監視することを特徴とするキャリーオーバー監視方法。 After condensing a part of the steam with a heat exchanger, measure the pH value and electrical conductivity with a pH meter and an electrical conductivity meter,
A carry-over monitoring method characterized by monitoring carry-over according to a change in the measured value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004283958A JP2006097963A (en) | 2004-09-29 | 2004-09-29 | Carry-over monitoring method and monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004283958A JP2006097963A (en) | 2004-09-29 | 2004-09-29 | Carry-over monitoring method and monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2006097963A true JP2006097963A (en) | 2006-04-13 |
Family
ID=36237959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004283958A Pending JP2006097963A (en) | 2004-09-29 | 2004-09-29 | Carry-over monitoring method and monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2006097963A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008128783A (en) * | 2006-11-20 | 2008-06-05 | Kurita Water Ind Ltd | Boiler condensation system corrosion monitoring device |
-
2004
- 2004-09-29 JP JP2004283958A patent/JP2006097963A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008128783A (en) * | 2006-11-20 | 2008-06-05 | Kurita Water Ind Ltd | Boiler condensation system corrosion monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2694312C (en) | Method and device for creating and analyzing an at temperature and pressure oxidation-reduction potential signature in hot water systems for preventing corrosion | |
| EP2179076B1 (en) | Method for preventing corrosion in hot water systems | |
| US7310877B2 (en) | Method of producing sensors for monitoring corrosion of heat-exchanger tubes | |
| CN111033253B (en) | Water quality diagnosis system, power station, and water quality diagnosis method | |
| JP4983069B2 (en) | Pure water supply boiler water system treatment method and treatment apparatus | |
| US9352980B2 (en) | Method and device for preventing corrosion in hot water systems | |
| CN104122195B (en) | Detection liquid for detecting corrosion resistance of surface passivation film of tinned steel plate | |
| US7998352B2 (en) | Method and device for cleanup and deposit removal from internal hot water system surfaces | |
| WO2014112511A1 (en) | Test piece for monitoring pitting corrosion, apparatus for monitoring pitting corrosion and method for monitoring pitting corrosion | |
| AU2013246154B2 (en) | Method and device for preventing corrosion in hot water systems | |
| JP2006097963A (en) | Carry-over monitoring method and monitoring device | |
| JP2004113981A (en) | Water treatment method and water treatment system for circulating water system | |
| JP4288018B2 (en) | Water quality evaluation method and water quality management system | |
| JP2010096534A (en) | Water treatment system and method for secondary cooling system in pwr power plant | |
| JP5672237B2 (en) | Operation method of hot water supply system using heat pump using water quality diagnosis | |
| CN105865351B (en) | A kind of lossless detection method of drum inner surface fouling thickness | |
| JP2018151132A (en) | Cleaning method of heat exchanger | |
| KR20030033902A (en) | Method for monitoring of impurities in water with high sensitivity and apparatus using the same | |
| US10384957B2 (en) | Apparatus and method for detecting degassed cation conductivity | |
| JP2017020938A (en) | Monitoring device, steam turbine facility including the same, and method for monitoring steam turbine facility | |
| Suslov et al. | Experience gained from conduction of water chemistry with the use of helamin in the PGU-39 power units at the sochi thermal power station | |
| JP2012255627A (en) | Blow rate calculation method and blow control method for boiler | |
| US20120200317A1 (en) | Feedforward/feedback control system for industrial water systems | |
| Zhang | Otahuhu B Power Station condenser in-leakage analysis and condensate monitoring system: a thesis presented in partial fulfilment of the requirements for the degree of Master of Engineering in Electronics Engineering at Massey University, Wellington, New Zealand | |
| JP2014214981A (en) | Cooling device and method of condenser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070713 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090619 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20090630 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090821 |
|
| A02 | Decision of refusal |
Effective date: 20100126 Free format text: JAPANESE INTERMEDIATE CODE: A02 |