JPS6354438B2 - - Google Patents
Info
- Publication number
- JPS6354438B2 JPS6354438B2 JP1255282A JP1255282A JPS6354438B2 JP S6354438 B2 JPS6354438 B2 JP S6354438B2 JP 1255282 A JP1255282 A JP 1255282A JP 1255282 A JP1255282 A JP 1255282A JP S6354438 B2 JPS6354438 B2 JP S6354438B2
- Authority
- JP
- Japan
- Prior art keywords
- condensate
- hydrazine
- injection pump
- control
- flow rate
- 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
Links
Description
【発明の詳細な説明】
本発明は、ヒドラジン注入によるボイラの給復
水PH制御方法に関し、更に詳細には脱酸素剤とし
て使用されるヒドラジンのアンモニアへの転化を
利用して給復水のPHを制御する方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling the pH of feed and condensate water in a boiler by injecting hydrazine. It relates to a method of controlling.
従来、この種のボイラの給復水PH制御系は第１
図に示すように、３％アンモニアタンク１０をア
ンモニア注入ポンプ１２および弁１４を介して復
水ポンプ１６の下流に接続し、一方濃ヒドラジン
（10％）タンク１８を弁２０、濃ヒドラジン注入
ポンプ２２並びに弁２４を介して復水ポンプ１６
の下流に接続し、更に希ヒドラジン（0.5％）タ
ンク２６を弁２８、希ヒドラジン注入ポンプ３０
並びに弁３２を介して復水ポンプ１６の下流に連
結して薬注装置３８を構成し、更に低圧ヒータ４
０と脱気器４２とを設ける。希ヒドラジン注入ポ
ンプ３０は流量検出部３４と演算部３６とを介し
て制御される。そして、ボイラの給復水PH制御
は、アンモニアを手動にて間欠注入して実施さ
れ、一方ヒドラジンは希ヒドラジンを通常運転時
は復水流量に比例して脱酸素を目的として復水ポ
ンプ出口に連続注入され、また濃ヒドラジンは起
動停止時手動注入されていた。 Conventionally, the feed and condensate PH control system for this type of boiler was
As shown, a 3% ammonia tank 10 is connected downstream of a condensate pump 16 via an ammonia injection pump 12 and valve 14, while a concentrated hydrazine (10%) tank 18 is connected to a concentrated hydrazine (10%) tank 18 via valve 20 and a concentrated hydrazine injection pump 22. as well as condensate pump 16 via valve 24
Further, a dilute hydrazine (0.5%) tank 26 is connected downstream of the valve 28 and a dilute hydrazine injection pump 30.
It is also connected downstream of the condensate pump 16 via the valve 32 to constitute a chemical injection device 38, and further connected to the low pressure heater 4.
0 and a deaerator 42 are provided. The dilute hydrazine injection pump 30 is controlled via a flow rate detection section 34 and a calculation section 36. Boiler feed and condensate PH control is carried out by manually injecting ammonia intermittently, while diluted hydrazine is injected into the condensate pump outlet in proportion to the condensate flow rate during normal operation for the purpose of deoxidizing. Concentrated hydrazine was injected continuously, and concentrated hydrazine was injected manually at startup and stop.
然しながら、この従来のボイラの給復水PH制御
は、通常運転時に脱酸素剤として注入される希ヒ
ドラジン（0.5％）による給水中の残留ヒドラジ
ンが10〜30ppb程度であり、これだけではPHを規
定値（約8.5〜9.0）内に入れることは難しい。ま
た、アンモニア（３％）は、ボイラでは復水脱塩
装置がなくボイラを一巡したアンモニアリーク以
外は残留して給水のPH調整に関与するので、アン
モニアの注入は間欠注入にならざるを得ず、また
反応が早いため、PHを安定させることが難しく、
起動用の容量の大きなポンプとは別に通常運転用
の小容量ポンプまたは低濃度薬注が必要となる。
更に、濃ヒドラジン（10％）を注入する場合でも
転化したアンモニアについては同様の問題があ
り、プラントの特性、薬液濃度によつては制御系
にハンチングが起る。更に、起動時の急激な水質
変化及び通常運転時のPH維持のためには手動にて
木目細い薬注が必要であり、多大な労力を要し
た。逆にこれを行わない場合には、PHが維持でき
ない問題があつた。 However, with this conventional boiler feed and condensate water PH control, the residual hydrazine in the feed water is about 10 to 30 ppb due to the dilute hydrazine (0.5%) injected as an oxygen scavenger during normal operation, and this alone does not allow the PH to reach the specified value. (approximately 8.5-9.0) It is difficult to put it within. In addition, ammonia (3%) does not have a condensate desalination device in the boiler, and other than the ammonia leak that has gone through the boiler, it remains and contributes to the pH adjustment of the feed water, so ammonia injection has to be intermittent injection. Also, because the reaction is fast, it is difficult to stabilize the PH.
In addition to a large-capacity pump for startup, a small-capacity pump or low-concentration drug injection is required for normal operation.
Furthermore, even when concentrated hydrazine (10%) is injected, there is a similar problem with converted ammonia, and hunting may occur in the control system depending on the characteristics of the plant and the concentration of the chemical solution. Furthermore, in order to maintain the pH level during normal operation due to the sudden change in water quality during startup, it was necessary to manually pour the chemical in a finely grained manner, which required a great deal of effort. Conversely, if this was not done, there was a problem that the pH could not be maintained.
それ故、本発明の一般的目的は、ボイラの給復
水のPH制御を自動的に行なう方法を提供するにあ
る。 SUMMARY OF THE INVENTION Therefore, a general object of the present invention is to provide a method for automatically controlling the pH of boiler feed and condensate water.
また、本発明の別の目的は、従来のPH制御装置
を利用して、低コストでボイラの給復水のPH制御
を自動的に行なう方法を提供するにある。 Another object of the present invention is to provide a method for automatically controlling the PH of boiler supply and condensate water at low cost using a conventional PH control device.
この目的を達成するため、本発明においては、
節炭器入口給水の電気伝導率を検出し、これを所
定の上下限設定値と比較しその検出信号により濃
ヒドラジン注入ポンプのオン・オフ制御を行うと
共に復水系の流量を検出して復水流量比例信号で
前記濃ヒドラジン注入ポンプのストローク長の調
節を行なうことを特徴とする。 In order to achieve this objective, in the present invention,
The electrical conductivity of the feed water at the inlet of the economizer is detected, this is compared with the predetermined upper and lower limit set values, and the detected signal is used to control the on/off of the concentrated hydrazine injection pump, and the flow rate of the condensate system is detected to control the condensation. The present invention is characterized in that the stroke length of the concentrated hydrazine injection pump is adjusted by a flow rate proportional signal.
さらに、本発明においては、希ヒドラジンのPH
調節のバツクアツプを行うように濃ヒドラジン注
入を調整してボイラの給復水PH制御を自動的に行
うため、節炭器入口給水の電気伝導率を検出し、
これを所定の上下限設定値と比較しその検出信号
により濃ヒドラジン注入ポンプのオン・オフ制御
を行うと共に復水系の流量を検出して復水流量比
例信号で前記濃ヒドラジン注入ポンプのストロー
ク長の調節を行い、かつ前記復水系の流量検出に
より復水流量比例信号で希ヒドラジン注入ポンプ
の回転数制御を行うと共に回転数の下限リミツタ
により前記希ヒドラジン注入ポンプのストローク
長の調節を行うよう構成することができる。 Furthermore, in the present invention, the pH of dilute hydrazine is
In order to automatically control the boiler feed and condensate water PH by adjusting the concentrated hydrazine injection to perform a back-up adjustment, the electrical conductivity of the feed water at the inlet of the economizer is detected.
This is compared with predetermined upper and lower limit set values, and the detected signal is used to control the on/off of the concentrated hydrazine injection pump.The flow rate of the condensate system is also detected, and the stroke length of the concentrated hydrazine injection pump is controlled using the condensate flow rate proportional signal. The system is configured to control the rotation speed of the dilute hydrazine injection pump using a condensate flow rate proportional signal based on the flow rate detection of the condensate system, and to adjust the stroke length of the dilute hydrazine injection pump using a rotation speed lower limit limiter. be able to.
次に、本発明に係るヒドラジン注入によるボイ
ラの給復水PH制御方法につき、この方法を実施す
る制御系との関係において添付図面を参照しなが
ら以下詳細に説明する。 Next, a boiler feed/condensate water PH control method using hydrazine injection according to the present invention will be described in detail below with reference to the accompanying drawings in relation to a control system that implements this method.
第２図は、本発明に係るボイラの給復水PH制御
系を示すものであり、濃ヒドラジンタンク５０は
弁５２、濃ヒドラジン注入ポンプ５４並びに弁５
６を介して復水ポンプ５８の下流に接続され、更
に弁６０を介して脱気器７８に接続される。ま
た、希ヒドラジンタンク６１は弁６２、希ヒドラ
ジン注入ポンプ６４並びに弁６６を介して復水ポ
ンプ５８の下流に接続される。更に、アンモニア
タンク６８は、アンモニア注入ポンプ７０および
弁７２を介して復水ポンプ５８の下流に接続され
る。 FIG. 2 shows a boiler feed and condensate PH control system according to the present invention, in which a concentrated hydrazine tank 50 includes a valve 52, a concentrated hydrazine injection pump 54, and a valve 5.
6 to the downstream side of the condensate pump 58, and further connected to the deaerator 78 via a valve 60. Further, the dilute hydrazine tank 61 is connected downstream of the condensate pump 58 via a valve 62 , a dilute hydrazine injection pump 64 , and a valve 66 . Additionally, ammonia tank 68 is connected downstream of condensate pump 58 via ammonia injection pump 70 and valve 72.
復水系は、復水ポンプ５８、低圧ヒータ７４、
流量計７６並びに脱気器７８に接続され、一方、
給水系は給水ポンプ８０、高圧ヒータ８２、電導
率検出器８４並びに節炭器８６を介してボイラ８
８に接続される。 The condensate system includes a condensate pump 58, a low pressure heater 74,
connected to a flow meter 76 as well as a deaerator 78, while
The water supply system is connected to the boiler 8 via a water supply pump 80, a high pressure heater 82, a conductivity detector 84, and a energy saver 86.
Connected to 8.
電導率検出器８４における検出信号は、上下限
設定器９０並びに発停演算部９２介して濃ヒドラ
ジン注入ポンプ５４を制御し、一方流量計７６か
らの復水流量比例信号は３分割されて、その一つ
の信号は比率設定器９４、下限リミツタ９６、切
替器９８並びにストローク長調節器１００を介し
てドライブユニツト１２３を制御し、他の二つの
信号は希ヒドラジン注入ポンプ６４を制御するも
ので、一方の信号は比率設定器１０２、下限リミ
ツタ１０４、切替器１０６並びに回転数制御器１
０８を介して変速モータ１１０を制御し、別の信
号は比率設定器１１２、上下限リミツタ１１４、
切替器１１６並びにストローク長調節器１１８を
介してドライブユニツト１２０を制御する。 The detection signal from the conductivity detector 84 controls the concentrated hydrazine injection pump 54 via the upper and lower limit setter 90 and the start/stop calculation section 92, while the condensate flow rate proportional signal from the flowmeter 76 is divided into three parts. One signal controls the drive unit 123 via the ratio setter 94, lower limiter 96, switch 98 and stroke length regulator 100, and the other two signals control the dilute hydrazine injection pump 64; The signals are sent to the ratio setter 102, the lower limiter 104, the switch 106 and the rotation speed controller 1.
08 to control the variable speed motor 110, and other signals are sent to the ratio setter 112, upper and lower limiter 114,
The drive unit 120 is controlled via a switch 116 and a stroke length adjuster 118.
次に、このように構成された本発明に係るボイ
ラの給復水PH制御系の作用につき説明する。 Next, the operation of the boiler feed and condensate water PH control system according to the present invention configured as described above will be explained.
濃ヒドラジン注入ポンプ５４は、希ヒドラジン
のバツクアツプとして二つの制御系により制御さ
れる。その一つの制御系は節炭器８６の入口の電
導率検出器８４により検出される電気伝導度
〔μs／cm〕と上下限設定器９０における所定の設
定値（上下限範囲約２〜2.2μs／cm）との比較検
知による。この場合、PH値は、電気伝導度と対数
比例関係にあり、電導度計の取扱いおよび保守
は、PH計と比較して容易であるので電気伝導度に
よる制御が好ましい。節炭器入口における電気伝
導度が設定値（下限）以下となつた際には発停演
算部９２を介して濃ヒドラジン注入ポンプ５４を
運転し、一方設定値（上限）以上となつた際には
停止する。このようにして濃ヒドラジンを間欠自
動注入することにより給復水のPHを規定値（8.5
〜9.0）内に設定する。別の制御系において、流
量計７６からの復水流量比例信号により比率設定
器９４、下限リミツタ９６、切替器９８並びにス
トローク長調節器１００を介して制御されるドラ
イブユニツト１２３は濃ヒドラジン注入ポンプ５
４のストローク長を自動調節し、濃ヒドラジンの
注入量を調節して間欠自動注入による制御系のハ
ンチングを少なくし、プラントの特性に見合つた
PH変化を連続的に補正する。 Concentrated hydrazine infusion pump 54 is controlled by two control systems as a dilute hydrazine backup. One control system is based on the electric conductivity [μs/cm] detected by the conductivity detector 84 at the entrance of the economizer 86 and the predetermined setting value in the upper and lower limit setter 90 (upper and lower limit range approximately 2 to 2.2 μs). /cm) by comparison detection. In this case, the PH value is in a logarithmic proportional relationship with the electrical conductivity, and the handling and maintenance of the electrical conductivity meter is easier than that of the PH meter, so control using electrical conductivity is preferable. When the electrical conductivity at the inlet of the economizer becomes less than the set value (lower limit), the concentrated hydrazine injection pump 54 is operated via the start/stop calculation unit 92, while when it becomes more than the set value (upper limit) stops. By intermittently automatically injecting concentrated hydrazine in this way, the pH of the feed condensate can be adjusted to the specified value (8.5
~9.0). In another control system, a drive unit 123 controlled by a condensate flow rate proportional signal from a flow meter 76 via a ratio setter 94, a lower limiter 96, a switch 98, and a stroke length regulator 100 controls the concentrated hydrazine injection pump 5.
The stroke length of step 4 is automatically adjusted, and the injection amount of concentrated hydrazine is adjusted to reduce hunting in the control system due to intermittent automatic injection, and to match the characteristics of the plant.
Continuously corrects PH changes.
希ヒドラジンポンプ６４は、流量計７６からの
復水流量比例信号で二系統の制御を行う。すなわ
ち、一方の制御系において比率設定器１０２、下
限リミツタ１０４、切替器１０６並びに回転数制
御器１０８を介して制御される変速モータ１１０
は、ポンプの回転数を制御してポンプ吐出量を制
御する。さらに制御範囲を拡大するため回転数の
低回転数域ではストローク長を流量比例させる。
そのために、他方の制御系において復水流量比例
信号は比率設定器１１２、上下限リミツタ１１
４、切替器１１６並びにストローク長調節器１１
８を介してドライブユニツト１２０を制御し、こ
のドライブユニツト１２０は、希ヒドラジン注入
ポンプ６４のストローク長を自動調節し、希ヒド
ラジンの注入量を自動調節して給水中の残留ヒド
ラジンを約20ppbに調節する。 The dilute hydrazine pump 64 performs two systems of control using a condensate flow rate proportional signal from a flow meter 76. That is, in one control system, the variable speed motor 110 is controlled via the ratio setter 102, the lower limiter 104, the switch 106, and the rotation speed controller 108.
The pump discharge amount is controlled by controlling the rotation speed of the pump. Furthermore, in order to expand the control range, the stroke length is made proportional to the flow rate in the low rotation speed range.
Therefore, in the other control system, the condensate flow rate proportional signal is controlled by the ratio setter 112 and the upper and lower limit limiter 11.
4. Switcher 116 and stroke length adjuster 11
8, the drive unit 120 automatically adjusts the stroke length of the dilute hydrazine injection pump 64, and automatically adjusts the injection amount of dilute hydrazine to adjust the residual hydrazine in the feed water to about 20 ppb. do.
更に、プラントの特性が判れば、節炭器入口の
電気伝導度の上下限バンドと流量比例係数の設定
変更を行ない、更に希・濃ヒドラジンタンクの連
絡弁１２２により薬液濃度を変更して、制御系が
プラントの特性に追従し得るよう簡単に対処可能
である。 Furthermore, once the characteristics of the plant are known, the upper and lower limit bands of electrical conductivity at the inlet of the economizer and the flow rate proportionality coefficient settings are changed, and the concentration of the chemical solution is changed using the communication valve 122 of the dilute and concentrated hydrazine tanks to control the control. The system can be easily adapted to follow the characteristics of the plant.
プラント起動時・停止時は、希ヒドラジンは切
替器１０６，１１６を固定設定値φA，φBにて一
定量注入し、同様に濃ヒドラジンは切替器９８を
固定値φCにて一定量を弁５６または弁６０を介
して注入する。 When starting and stopping the plant, a fixed amount of dilute hydrazine is injected using the switch 106 and 116 at fixed set values φ A and φ B , and similarly, a fixed amount of concentrated hydrazine is injected using the switch 98 at the fixed value φ C. Inject via valve 56 or valve 60.
アンモニアは、冷態起動時のようなヒドラジン
のアンモニアへの転化が期待できない場合の給水
PH調節のバツクアツプとして手動にてストローク
長調節器１２４並びにドライブユニツト１２５を
介してストローク設定し間欠注入する。 Ammonia is used in the water supply when conversion of hydrazine to ammonia cannot be expected, such as during cold startup.
As a backup for pH adjustment, the stroke is manually set via the stroke length adjuster 124 and drive unit 125 for intermittent injection.
希ヒドラジンは、約0.2〜0.5％、濃ヒドラジン
は約２〜５％の範囲で選択される。 Dilute hydrazine is selected in a range of about 0.2-0.5% and concentrated hydrazine in a range of about 2-5%.
本発明方法によれば、希ヒドラジン、濃ヒドラ
ジン、アンモニア注入系を備えた従来のボイラの
給復水のPH制御装置の自動制御化を達成し、制御
系のハンチングの少ない状態で連続的に制御で
き、かつ起動時の繁雑な調整のための労力を省
き、安定したPHの維持が可能となる。また、アン
モニアは冷態起動時のPH調整専用とすることがで
き、調整時間の短縮が計れる。 According to the method of the present invention, it is possible to achieve automatic control of the PH control device for the feed and condensate water of conventional boilers equipped with dilute hydrazine, concentrated hydrazine, and ammonia injection systems, and to achieve continuous control with less hunting in the control system. It also saves the labor of making complicated adjustments at startup, making it possible to maintain a stable pH. Additionally, ammonia can be used exclusively for pH adjustment during cold startup, reducing adjustment time.
以上、本発明方法の好適な実施例について説明
したが、本発明の精神を逸脱しない範囲内におい
て種々の変更をなし得ることは勿論である。 Although the preferred embodiments of the method of the present invention have been described above, it goes without saying that various changes can be made without departing from the spirit of the present invention.
第１図は従来のボイラの給復水PH制御系の系統
図、第２図は本発明方法を実施するためのヒドラ
ジン注入によるボイラの給復水PH制御系の系統図
である。
５０……濃ヒドラジンタンク、５２……弁、５
４……濃ヒドラジン注入ポンプ、５６……弁、５
８……復水ポンプ、６０……弁、６１……希ヒド
ラジンタンク、６２……弁、６４……希ヒドラジ
ン注入ポンプ、６６……弁、６８……アンモニア
タンク、７０……アンモニア注入ポンプ、７２…
…弁、７４……低圧ヒータ、７６……流量計、７
８……脱気器、８０……給水ポンプ、８２……高
圧ヒータ、８４……電導率検出器、８６……節炭
器、８８……ドラム形ボイラ、９０……上下限設
定器、９２……発停演算部、９４……比率設定
器、９６……下限リミツタ、９８……切替器、１
００……ストローク長調節器、１０２……比率設
定器、１０４……下限リミツタ、１０６……切替
器、１０８……回転数制御器、１１０……変速モ
ータ、１１２……比率設定器、１１４……上下限
リミツタ、１１６……切替器、１１８，１２４…
…ストローク長調節器、１２０，１２３，１２５
……ドライブユニツト、１２２……連絡弁。
FIG. 1 is a system diagram of a conventional boiler feed/condensate PH control system, and FIG. 2 is a system diagram of a boiler feed/condensate PH control system using hydrazine injection for carrying out the method of the present invention. 50... Concentrated hydrazine tank, 52... Valve, 5
4...Concentrated hydrazine injection pump, 56...Valve, 5
8... Condensate pump, 60... Valve, 61... Dilute hydrazine tank, 62... Valve, 64... Dilute hydrazine injection pump, 66... Valve, 68... Ammonia tank, 70... Ammonia injection pump, 72...
...Valve, 74...Low pressure heater, 76...Flowmeter, 7
8... Deaerator, 80... Water supply pump, 82... High pressure heater, 84... Conductivity detector, 86... Energy saver, 88... Drum type boiler, 90... Upper and lower limit setter, 92 ...start/stop calculation unit, 94...ratio setter, 96...lower limit limiter, 98...switcher, 1
00... Stroke length adjuster, 102... Ratio setter, 104... Lower limit limiter, 106... Switcher, 108... Rotation speed controller, 110... Speed change motor, 112... Ratio setter, 114... ...Upper/lower limit limiter, 116...Switcher, 118, 124...
...Stroke length adjuster, 120, 123, 125
...Drive unit, 122...Communication valve.
Claims (1)
を所定の上下限設定値と比較しその検出信号によ
り濃ヒドラジン注入ポンプのオン・オフ制御を行
うと共に復水系の流量を検出して復水流量比例信
号で前記濃ヒドラジン注入ポンプのストローク長
の調節を行うことを特徴とするボイラの給復水PH
制御方法。 ２ 濃ヒドラジンは約２〜５％の範囲で選択され
る特許請求の範囲第１項記載のPH制御方法。 ３ 節炭器入口給水の電気伝導率を検出し、これ
を所定の上下限設定値と比較しその検出信号によ
り濃ヒドラジン注入ポンプのオン・オフ制御を行
うと共に復水系の流量を検出して復水流量比例信
号で前記濃ヒドラジン注入ポンプのストローク長
の調節を行い、かつ前記復水系の流量検出により
復水流量比例信号で希ヒドラジン注入ポンプの回
転数制御を行うと共に回転数の下限リミツタによ
り前記希ヒドラジン注入ポンプのストローク長の
調節を行うことを特徴とするボイラの給復水PH制
御方法。 ４ 濃ヒドラジンは約２〜５％の範囲で選択され
希ヒドラジンは約0.2〜0.5％の範囲で選択される
特許請求の範囲第３項記載のPH制御方法。[Claims] 1. Detect the electric conductivity of the water at the inlet of the energy saver, compare it with predetermined upper and lower limit set values, and use the detection signal to control on/off of the concentrated hydrazine injection pump and to control the condensate system. A boiler condensate supply PH characterized in that the stroke length of the concentrated hydrazine injection pump is adjusted by detecting the flow rate and using a condensate flow rate proportional signal.
Control method. 2. The pH control method according to claim 1, wherein the concentrated hydrazine is selected in a range of about 2 to 5%. 3 Detects the electrical conductivity of the feed water at the inlet of the economizer, compares it with predetermined upper and lower limit set values, and uses the detection signal to control on/off of the concentrated hydrazine injection pump, and detects the flow rate of the condensate system to control the condensate. The stroke length of the concentrated hydrazine injection pump is adjusted by the water flow rate proportional signal, and the rotation speed of the dilute hydrazine injection pump is controlled by the condensate flow rate proportional signal by detecting the flow rate of the condensate system, and the rotation speed lower limiter is used to control the rotation speed of the dilute hydrazine injection pump. A boiler supply and condensate water PH control method characterized by adjusting the stroke length of a dilute hydrazine injection pump. 4. The pH control method according to claim 3, wherein the concentrated hydrazine is selected in a range of about 2 to 5% and the dilute hydrazine is selected in a range of about 0.2 to 0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1255282A JPS58131193A (en) | 1982-01-30 | 1982-01-30 | Method of controlling ph of supplied or condensed water in drum-type boiler by injection of hydrazine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1255282A JPS58131193A (en) | 1982-01-30 | 1982-01-30 | Method of controlling ph of supplied or condensed water in drum-type boiler by injection of hydrazine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58131193A JPS58131193A (en) | 1983-08-04 |
| JPS6354438B2 true JPS6354438B2 (en) | 1988-10-27 |
Family
ID=11808492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1255282A Granted JPS58131193A (en) | 1982-01-30 | 1982-01-30 | Method of controlling ph of supplied or condensed water in drum-type boiler by injection of hydrazine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58131193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11130688B2 (en) | 2017-01-30 | 2021-09-28 | Kurita Water Industries Ltd. | Method for controlling pH by electrical conductivity |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372205A (en) * | 2001-06-15 | 2002-12-26 | Mitsubishi Heavy Ind Ltd | Liquid chemical supply equipment |
| JP2008057888A (en) * | 2006-08-31 | 2008-03-13 | Mitsubishi Heavy Ind Ltd | Water treatment method for steam plant |
| JP5832908B2 (en) * | 2012-01-11 | 2015-12-16 | 中国電力株式会社 | Chemical injection management equipment and chemical injection management system |
| JP6686591B2 (en) * | 2016-03-22 | 2020-04-22 | 三浦工業株式会社 | Drain collection system |
| JP6350706B1 (en) * | 2017-03-30 | 2018-07-04 | 栗田工業株式会社 | Water quality adjustment water production equipment |
| JP6766090B2 (en) * | 2018-04-19 | 2020-10-07 | 三菱パワー株式会社 | Exhaust heat recovery boiler and cleaning method |
-
1982
- 1982-01-30 JP JP1255282A patent/JPS58131193A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11130688B2 (en) | 2017-01-30 | 2021-09-28 | Kurita Water Industries Ltd. | Method for controlling pH by electrical conductivity |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58131193A (en) | 1983-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108380051B (en) | Stable energy-saving reverse osmosis system and control method thereof | |
| JPS6354438B2 (en) | ||
| JP2006074027A (en) | Chemical liquid mixing and supplying apparatus and method | |
| US5738495A (en) | Device for contolling the water pressure and flow in a water supply unit | |
| JP3311139B2 (en) | Membrane module system | |
| JPS60129103A (en) | Ultrapure water production equipment | |
| CN108928907B (en) | Supercritical water oxidation reactor and self-adaptive pressure regulation and control system and method thereof | |
| JPS5661589A (en) | Water-level controller for side stream type condenser | |
| CN111977714A (en) | Control method for stabilizing oxygen content in boiler water | |
| JP3655014B2 (en) | Boiler feed pipe corrosion prevention film forming device | |
| JP2575482B2 (en) | Deaerator pressure control system in steam turbine cycle | |
| JP3669638B2 (en) | Concentration blow control method for boiler | |
| JPH027840Y2 (en) | ||
| JPH0675720B2 (en) | Sludge concentration method at low flow rate | |
| KR100383276B1 (en) | System and method for controlling slushy level at a conmstant density of slushy | |
| JP3000815B2 (en) | Raw water supply control method for deaerator | |
| JPS5898191A (en) | Controller for purification of water in activated sludge process | |
| SU1015179A2 (en) | Drum boiler continuous blowing-down automatic control method | |
| JPH0128841B2 (en) | ||
| SU382684A1 (en) | BIBLIO- ^ ENA | |
| JPH111300A (en) | Liquid automatic shipping equipment | |
| JPS6135548Y2 (en) | ||
| JPH1028963A (en) | Control method of deaeration device and control device | |
| JPH10235396A (en) | Water treatment equipment for fuel cell power generation equipment | |
| FR2371554A1 (en) | Plant for regulating pressure of domestic water supply - has storage tank with pressure controlled motorised force type pump |