JP2987333B2 - Boiler dosing control method - Google Patents
Boiler dosing control methodInfo
- Publication number
- JP2987333B2 JP2987333B2 JP8203009A JP20300996A JP2987333B2 JP 2987333 B2 JP2987333 B2 JP 2987333B2 JP 8203009 A JP8203009 A JP 8203009A JP 20300996 A JP20300996 A JP 20300996A JP 2987333 B2 JP2987333 B2 JP 2987333B2
- Authority
- JP
- Japan
- Prior art keywords
- blow
- boiler
- chemical injection
- rate
- 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
Links
Landscapes
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、ボイラの薬注制御方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling chemical injection of a boiler.
【０００２】[0002]
【従来の技術】ボイラは腐食などを防止するために、給
水ラインに薬注ラインを連結しておき、給水ポンプと連
動して薬注ポンプを作動させることで薬品処理した水を
給水している。薬品の注入は、ボイラへの給水水質を予
め分析し、水質より給水量に対する薬品の注入割合を薬
注率として決定しておき、ボイラへの給水と薬注率に基
づいて薬注ポンプの稼働を制御することで行われる。ボ
イラ内へ給水された水は、加熱により蒸気として取り出
され、蒸発と給水を繰り返すことで給水中に含まれてい
た不純物が濃縮される。缶水の濃縮が進んでいない場
合、比較的高い割合で薬品を注入する必要があるが、缶
水が濃縮すると缶水中の薬品濃度が上昇するため、注入
が必要な薬品量は少なくなる。2. Description of the Related Art In a boiler, a chemical injection line is connected to a water supply line to prevent corrosion and the like, and chemical-treated water is supplied by operating a chemical injection pump in conjunction with a water supply pump. . For chemical injection, the quality of the water supply to the boiler is analyzed in advance, and the injection ratio of the chemical to the amount of water supplied is determined as the injection rate based on the water quality, and the injection pump is operated based on the water supply to the boiler and the injection rate. It is performed by controlling. The water supplied into the boiler is taken out as steam by heating, and impurities contained in the feedwater are concentrated by repeating evaporation and water supply. If the concentration of the can water has not progressed, it is necessary to inject the chemical at a relatively high rate. However, when the can water is concentrated, the concentration of the chemical in the can water increases, so that the amount of the chemical that needs to be injected decreases.
【０００３】ボイラは、缶水が濃縮しすぎるとキャリオ
ーバが発生するなどの不都合が生じるため、給水量に対
して所定のブロー率で濃縮ブローを行うことで、濃縮度
を低下させている。缶水の濃縮状態はブロー率によって
異なり、ブロー率を高く設定すると濃縮度は低く保た
れ、ブロー率を低く設定すると濃縮度が高くなる。その
ため、給水の水質から定められる薬注率が同じであって
も、ブロー率が異なると最適な薬注率は異なり、薬品注
入量が過剰となったり、逆に薬品注入量が不足すること
がある。また、特開平８−１０５６０４に記載されてい
るように運転中にブロー率の修正を行っているボイラの
場合、最適な薬注率は常に変動していることとなってい
た。[0003] In a boiler, if the canned water is concentrated too much, a problem such as carry-over occurs. Therefore, the concentration of the boiler is reduced by performing the concentration blow at a predetermined blow rate with respect to the supplied water amount. The concentration state of the can water differs depending on the blow rate. When the blow rate is set high, the concentration is kept low, and when the blow rate is set low, the concentration becomes high. For this reason, even if the injection rate determined from the water supply quality is the same, if the blow rate is different, the optimum injection rate will be different, resulting in an excessive amount of chemical injection or a shortage of chemical injection. is there. Further, in the case of a boiler in which the blow rate is corrected during operation as described in Japanese Patent Application Laid-Open No. 8-105604, the optimum chemical injection rate has always been changed.
【０００４】[0004]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、濃縮ブローを行っているボイラにおいて、
給水に注入する薬品量を缶水の濃縮状態に合わせた最適
な量とし、過不足なく薬品注入を行えるようにすること
にある。SUMMARY OF THE INVENTION The problem to be solved by the present invention is that in a boiler performing a concentration blow,
An object of the present invention is to make the amount of chemical to be injected into the feed water an optimal amount in accordance with the concentrated state of the can water so that the chemical can be injected without excess or shortage.
【０００５】[0005]
【課題を解決するための手段】ボイラに接続している給
水ラインに、薬注ポンプと薬液タンクを設けた薬注ライ
ンを連結し、薬注ポンプには給水量に対し所定の薬注率
で薬品の注入が行われるように薬注ポンプの稼働を制御
する薬注制御装置を接続しておき、ボイラへ給水された
水を加熱することで蒸気を発生させ、蒸発により濃縮し
た缶水は、缶水の排出を行うブロー装置によって所定の
ブロー率で濃縮ブローを行っているボイラにおいて、ブ
ロー装置でのブロー率を入力可能とし、入力したブロー
率により薬注率の修正を行う薬注率修正手段を設けてお
き、薬注制御装置は薬注率修正手段で修正した薬注率に
応じて薬注ポンプの稼働を制御する。[Means for Solving the Problems] A water supply line connected to a boiler is connected with a chemical injection line provided with a chemical injection pump and a chemical liquid tank. A dosing control device that controls the operation of the dosing pump is connected so that the injection of the drug is performed, and steam is generated by heating the water supplied to the boiler. In a boiler that performs concentration blow at a predetermined blow rate by a blow device that discharges canned water, the blow rate in the blow device can be input, and the drug injection rate is corrected based on the input blow rate. Means are provided, and the dosing control device controls the operation of the dosing pump according to the dosing rate corrected by the dosing rate correcting means.
【０００６】[0006]
【発明の実施の形態】本発明の一実施例を図面を用いて
説明する。ボイラ１下部に接続された給水ライン３は途
中に給水ポンプ２と電気伝導率検出装置１１が設けられ
ており、給水ライン３の途中に薬液タンク５と薬注ポン
プ４が設けられた薬注ライン６を連結する。ボイラ１下
部にはブロー配管８が接続されており、ブロー配管８途
中にブロー弁９を設ける。ボイラ制御装置１２はボイラ
の燃焼装置１３、給水ポンプ２、ボイラ内の水位を検出
する水位検出装置１４、電気伝導率検出装置１１のそれ
ぞれと信号線で接続し、ブロー弁９と接続されブロー弁
９の開閉制御を行うブロー制御装置１０および、薬注ポ
ンプ４と接続され薬注ポンプ４の稼働を制御する薬注制
御装置７とも接続する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. A water supply line 3 connected to the lower part of the boiler 1 is provided with a water supply pump 2 and an electric conductivity detecting device 11 in the middle thereof, and a chemical injection line in which a chemical solution tank 5 and a chemical injection pump 4 are provided in the middle of the water supply line 3. 6 are connected. A blow pipe 8 is connected to a lower portion of the boiler 1, and a blow valve 9 is provided in the middle of the blow pipe 8. The boiler control device 12 is connected to each of the boiler combustion device 13, the feedwater pump 2, the water level detection device 14 for detecting the water level in the boiler, and the electric conductivity detection device 11 by signal lines, and is connected to the blow valve 9 and the blow valve. A blow control device 10 for controlling the opening and closing of the pump 9 and a chemical injection control device 7 connected to the chemical injection pump 4 for controlling the operation of the chemical injection pump 4 are also connected.
【０００７】ボイラの各運転はボイラ制御装置１２によ
って制御される。水位検出装置１４にて検出している缶
内水位が下限水位より低いとボイラ制御装置１２は給水
ポンプ２を稼働させ、給水ライン３を通して給水を開始
し、給水によって水位が上限水位となると、給水ポンプ
２の稼働を停止することで水位を一定に保っており、給
水信号は薬注制御装置７へも出力しておく。燃焼装置１
３による燃焼もボイラ制御装置１２によって制御されて
おり、ボイラ制御装置１２からの燃焼指令によって燃焼
装置１３の燃焼を行う。電気伝導率検出装置１１は給水
の電気伝導率を計測し、計測結果をボイラ制御装置１２
へ出力する。ボイラ制御装置１２では計測された電気伝
導率と予め入力されていた計算式によりブロー率を算出
し、ブロー率をブロー制御装置１０と薬注制御装置７へ
出力する。また、ボイラ制御装置１２は、燃焼装置１３
へ燃焼指令を出力した時間を積算し、燃焼量とボイラへ
の給水量を演算により求めて、ブロー制御装置１０へ出
力する。[0007] Each operation of the boiler is controlled by a boiler control device 12. When the water level in the can detected by the water level detection device 14 is lower than the lower limit water level, the boiler control device 12 operates the water supply pump 2 and starts water supply through the water supply line 3. The water level is kept constant by stopping the operation of the pump 2, and the water supply signal is also output to the chemical injection control device 7. Combustion device 1
The combustion by 3 is also controlled by the boiler control device 12, and the combustion of the combustion device 13 is performed according to a combustion command from the boiler control device 12. The electric conductivity detecting device 11 measures the electric conductivity of the feed water and transmits the measurement result to the boiler control device 12.
Output to The boiler control device 12 calculates the blow rate based on the measured electric conductivity and a previously input calculation formula, and outputs the blow rate to the blow control device 10 and the chemical injection control device 7. The boiler control device 12 includes a combustion device 13
The combustion command output time is integrated, the amount of combustion and the amount of water supplied to the boiler are calculated, and output to the blow control device 10.
【０００８】ブロー制御装置１０ではボイラ制御装置１
２で求められた給水量とブロー率よりブローを実施する
タイミングを決定し、ブロー弁９の開閉を行わせる。薬
注制御装置７にはブロー率により薬注率の修正を行う算
出式を持った薬注率修正手段を設けておき、ボイラ制御
装置１２で求めたブロー率より薬注率を算出し、算出し
た薬注率と給水信号に基づいて薬注ポンプ４の稼働を制
御する。薬注ポンプ４を稼働することで薬液タンク５の
薬液が薬注ライン６を通して給水ライン３へ送られ、給
水ライン３内を送られている給水と混合してボイラ１内
へ供給される。ボイラ１は燃焼装置１３による燃焼で缶
水を加熱して蒸気を発生させ、濃縮した缶水はブロー弁
９を開くことで、ブロー配管８を通して排出される。In the blow control device 10, the boiler control device 1
The blow timing is determined based on the water supply amount and the blow rate obtained in step 2, and the blow valve 9 is opened and closed. The chemical injection control device 7 is provided with a chemical injection rate correcting means having a calculation formula for correcting the chemical injection rate based on the blow rate, and the chemical injection rate is calculated from the blow rate obtained by the boiler control device 12 and calculated. The operation of the chemical injection pump 4 is controlled based on the obtained chemical injection rate and the water supply signal. By operating the chemical injection pump 4, the chemical in the chemical solution tank 5 is sent to the water supply line 3 through the chemical injection line 6, mixed with the water supplied in the water supply line 3, and supplied into the boiler 1. The boiler 1 heats the can water by the combustion of the combustion device 13 to generate steam, and the concentrated can water is discharged through the blow pipe 8 by opening the blow valve 9.
【０００９】[0009]
【発明の効果】本発明を実施することにより、給水内に
行う薬品量を缶水の濃縮状態に応じて過不足の無く、最
適な量とすることができる。According to the present invention, the amount of chemicals to be supplied into the feed water can be set to an optimum amount without excess or deficiency according to the concentration state of the still water.
【図１】 本発明の一実施例のフロー図FIG. 1 is a flowchart of an embodiment of the present invention.
１ ボイラ ２ 給水ポンプ ３ 給水ライン ４ 薬注ポンプ ５ 薬液タンク ６ 薬注ライン ７ 薬注制御装置 ８ ブロー配管 ９ ブロー弁 １０ ブロー制御装置 １１ 電気伝導率検出装置 １２ ボイラ制御装置 １３ 燃焼装置 １４ 水位検出装置 DESCRIPTION OF SYMBOLS 1 Boiler 2 Water supply pump 3 Water supply line 4 Chemical injection pump 5 Chemical liquid tank 6 Chemical injection line 7 Chemical injection control device 8 Blow pipe 9 Blow valve 10 Blow control device 11 Electric conductivity detection device 12 Boiler control device 13 Combustion device 14 Water level detection apparatus
Claims (1)
注ポンプと薬液タンクを設けた薬注ラインを連結し、薬
注ポンプには給水量に対し所定の薬注率で薬品の注入が
行われるように薬注ポンプの稼働を制御する薬注制御装
置を接続しておき、ボイラへ給水された水を加熱するこ
とで蒸気を発生させ、蒸発により濃縮した缶水は、缶水
の排出を行うブロー装置によって所定のブロー率で濃縮
ブローを行っているボイラにおいて、ブロー装置でのブ
ロー率を入力可能とし、入力したブロー率により薬注率
の修正を行う薬注率修正手段を設けておき、薬注制御装
置は薬注率修正手段で修正した薬注率に応じて薬注ポン
プの稼働を制御することを特徴とするボイラの薬注制御
方法。1. A chemical injection pump and a chemical injection line provided with a chemical liquid tank are connected to a water supply line connected to a boiler, and the chemical injection pump is capable of injecting chemicals at a predetermined chemical injection rate with respect to the supplied water amount. A dosing control device that controls the operation of the dosing pump is connected so that steam is generated by heating the water supplied to the boiler, and the can water concentrated by evaporation is discharged as can water In a boiler performing a concentration blow at a predetermined blow rate by a blow device that performs a blow rate, a blow rate in the blow device can be input, and a drug injection rate correction unit that corrects the drug injection rate based on the input blow rate is provided. A chemical injection control method for a boiler, wherein the chemical injection control device controls the operation of the chemical injection pump according to the chemical injection rate corrected by the chemical injection rate correction means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8203009A JP2987333B2 (en) | 1996-07-12 | 1996-07-12 | Boiler dosing control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8203009A JP2987333B2 (en) | 1996-07-12 | 1996-07-12 | Boiler dosing control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1026307A JPH1026307A (en) | 1998-01-27 |
| JP2987333B2 true JP2987333B2 (en) | 1999-12-06 |
Family
ID=16466831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8203009A Expired - Fee Related JP2987333B2 (en) | 1996-07-12 | 1996-07-12 | Boiler dosing control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2987333B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5019168B2 (en) * | 2007-05-08 | 2012-09-05 | 三浦工業株式会社 | Drug injection method |
-
1996
- 1996-07-12 JP JP8203009A patent/JP2987333B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1026307A (en) | 1998-01-27 |
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