JPH10300009A - Detector for clogging of communication pipe for water level detection cylinder of boiler - Google Patents
Detector for clogging of communication pipe for water level detection cylinder of boilerInfo
- Publication number
- JPH10300009A JPH10300009A JP12018597A JP12018597A JPH10300009A JP H10300009 A JPH10300009 A JP H10300009A JP 12018597 A JP12018597 A JP 12018597A JP 12018597 A JP12018597 A JP 12018597A JP H10300009 A JPH10300009 A JP H10300009A
- Authority
- JP
- Japan
- Prior art keywords
- water level
- water
- level detection
- boiler
- detection
- 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
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ボイラの水位検出筒連
絡管詰まり検出装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting clogging of a water level detecting cylinder connecting pipe of a boiler.
【0002】[0002]
【従来の技術】ボイラの水位検出は、水位検出筒連絡管
によってボイラ内上部の蒸気部と下部の缶水部分にそれ
ぞれ接続された水位検出筒内の水位を検出することで行
われる。ボイラ運転時、ボイラ内の水はわき上がりが発
生するために直接の水位を検出することはできないが、
缶水部と連動した加熱されない水位検出筒を設けること
によって、正確な水位を検出することができる。しか
し、水位検出筒連絡管が詰まるとボイラ内部分の缶水の
圧力が水位検出筒へ伝わらなくなり、水位検出筒では水
位検出が行えなくなる。そのため水位検出筒連絡管に詰
まりが発生した場合には早急に修理などを行う必要があ
り、突然の修理によりボイラを停止することとなると、
ボイラ以外の操業にも影響する。2. Description of the Related Art The water level of a boiler is detected by detecting the water level in a water level detecting cylinder connected to an upper steam portion and a lower can water portion in the boiler by a water level detecting tube connecting pipe. During boiler operation, the water level in the boiler cannot be detected directly because it rises up.
By providing an unheated water level detection cylinder linked to the can water section, an accurate water level can be detected. However, if the water level detecting cylinder connecting pipe is clogged, the pressure of the canned water in the boiler cannot be transmitted to the water level detecting cylinder, and the water level detecting cylinder cannot detect the water level. Therefore, if the water level detection tube connecting pipe becomes clogged, it is necessary to repair it immediately, and if the boiler is stopped due to sudden repair,
It also affects operations other than boilers.
【0003】[0003]
【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、水位検出筒連絡管の詰まりを完全に詰まる
前の段階で予知し、前もって異常を検出することで、ボ
イラが突然停止して他の操業に影響を与えることを防止
することにある。SUMMARY OF THE INVENTION The problem to be solved by the present invention is that the clogging of the water level detecting tube connecting pipe is foreseen before it is completely clogged, and the boiler is suddenly stopped by detecting an abnormality in advance. To prevent other operations from being affected.
【0004】[0004]
【課題を解決するための手段】ボイラ内上部の蒸気部分
と下部の缶水部分のそれぞれに水位検出筒連絡管によっ
て接続させた水位検出筒を設け、水位検出筒内に設けた
水位検出用電極棒にて検出される水位に応じて給水を制
御しているボイラにおいて、前記水位検出筒とは別にも
う一つの水位検出筒を設け、2個の水位検出筒内にそれ
ぞれ同一の高さで水の有無を検出する水位検出用電極棒
と、全ブロー実施後の給水時に前記2本の水位検出用電
極棒による水有り検出を開始する時間の差を測定するタ
イマー装置を設けておき、タイマー装置にて測定された
差の値が所定の値よりも大きかった場合には詰まりが進
行しているとして予め異常予知信号を出力することで完
全に詰まる前に対応できるようにする。Means for Solving the Problems A water level detecting cylinder connected by a water level detecting cylinder connecting pipe is provided for each of an upper steam portion and a lower can water portion in the boiler, and a water level detecting electrode provided in the water level detecting cylinder. In a boiler that controls water supply in accordance with a water level detected by a rod, another water level detection cylinder is provided separately from the water level detection cylinder, and water is provided at the same height in each of the two water level detection cylinders. A water level detection electrode rod for detecting the presence / absence of water, and a timer device for measuring the difference between the times when the presence of water is started by the two water level detection electrode rods at the time of water supply after all the blows are performed, and a timer device If the value of the difference measured at is larger than a predetermined value, it is determined that the clogging is in progress, and an abnormality prediction signal is output in advance so that it is possible to cope with before the clogging is completed.
【0005】[0005]
【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5には底部に給水配管1、上部に蒸気
取り出し管8を接続し、給水配管1途中に給水ポンプ2
を設け、給水ポンプ2の稼働を行わせることで給水を行
う。ボイラ5上部には、ボイラ内部で燃焼を行わせる燃
焼装置9を設けておき、ボイラ内の缶水を加熱すること
で蒸気を発生させ、蒸気取り出し管8を通して蒸気を取
り出す。ボイラ内水位の検出には、水位検出筒連絡管6
によってボイラ上部の蒸気部分と下部の缶水部分に接続
された水位検出筒4が使用され、水位検出筒4には異な
る水位を電気信号として検出する3本の水位検出用電極
棒10を設けておく。水位検出用電極棒10は高位置の
ものから順番に電極棒E1、電極棒E2、電極棒E3と
名付けておき、各電極棒では先端部分での水の有無を検
出することで水位検出を行う。また、前記水位検出筒4
とは別にもう一つの水位検出筒4を設け、該水位検出筒
には電極棒E3と同じ高さで水位を検出する水位検出用
電極棒である電極棒E4を設けておく。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. A water supply pipe 1 is connected to the bottom of the boiler 5 and a steam extraction pipe 8 is connected to the top of the boiler 5.
Is provided, and the water supply pump 2 is operated to supply water. At the upper part of the boiler 5, a combustion device 9 for performing combustion inside the boiler is provided, and steam is generated by heating can water in the boiler, and the steam is taken out through a steam take-out pipe 8. For detecting the water level in the boiler, the water level detection tube
A water level detection tube 4 connected to the steam portion at the upper part of the boiler and the bottom water portion is used, and the water level detection tube 4 is provided with three water level detection electrode rods 10 for detecting different water levels as electric signals. deep. The water level detection electrode rods 10 are named electrode rod E1, electrode rod E2, and electrode rod E3 in order from the highest one, and each electrode rod detects the water level by detecting the presence or absence of water at the tip. . In addition, the water level detection cylinder 4
Separately, another water level detection cylinder 4 is provided, and the water level detection cylinder is provided with an electrode rod E4 which is a water level detection electrode rod for detecting a water level at the same height as the electrode rod E3.
【0006】ボイラの各制御を行う制御装置11は、給
水ポンプ2、燃焼装置9、各水位検出用電極棒10など
と電気的に接続させている。制御装置11は、水位の低
下により電極棒E2が水無しを検出すると給水ポンプ2
の稼働を開始、水位の上昇により電極棒E1が水有りを
検出すると給水ポンプ2の稼働を停止することで、缶内
水位を一定に保ち、ボイラの運転中に電極棒E3または
電極棒E4が水無しを検出すると燃焼を強制的に停止す
る。また、制御装置11内には電極棒E3が水無しの検
出から水有りの検出へ切り替わった瞬間と、電極棒E4
が水無しの検出から水有りの検出へ切り替わった瞬間の
時間差を測定するタイマー装置3を設けておき、測定し
た差の値が予め設定しておいた値を上回った場合には異
常予知警報を出力する異常検出装置7を設けておく。A control device 11 for controlling each of the boilers is electrically connected to the water supply pump 2, the combustion device 9, the electrode rods 10 for detecting the water level, and the like. When the electrode rod E2 detects that there is no water due to a decrease in the water level, the control device 11
When the electrode rod E1 detects the presence of water due to the rise of the water level, the operation of the water supply pump 2 is stopped to keep the water level in the can constant, and the electrode rod E3 or the electrode rod E4 is operated during the operation of the boiler. When the absence of water is detected, the combustion is forcibly stopped. In the control device 11, the moment when the electrode rod E3 switches from detection of absence of water to detection of presence of water,
Is provided with a timer device 3 for measuring the time difference at the moment of switching from the detection of absence of water to the detection of presence of water, and when the value of the measured difference exceeds a preset value, an abnormality prediction alarm is issued. An abnormality detection device 7 for outputting is provided.
【0007】燃焼装置9による燃焼を行わせると缶水は
加熱されて蒸気となり、蒸気を蒸気取り出し管8より取
り出し、取り出された分の水をボイラ5へ給水するもの
であるため、給水中の固形物は濃縮され、水管内面にス
ケールが固着したりボイラ底部にスラッジが堆積する。When the combustion by the combustion device 9 is performed, the can water is heated and becomes steam. The steam is taken out from the steam taking-out pipe 8 and the taken-out water is supplied to the boiler 5. The solids are concentrated, and the scale adheres to the inner surface of the water pipe and sludge accumulates on the bottom of the boiler.
【0008】ボイラは缶内の水を全て排出し、スラッジ
などを除去する全ブローを定期的に行っており、全ブロ
ーによって缶水が無くなると全ての水位検出用電極棒は
水無しを検出する。その後、給水ポンプ2によってボイ
ラ5内へ給水が行われると、ボイラ内と2つの水位検出
筒4で水位が上昇する。電極棒E3と電極棒E4のう
ち、先に水有りを検出した側の水有り検出信号がタイマ
ー装置3に達した時からもう一方の電極棒による水有り
検出信号がタイマー装置3に達するまでの時間差をタイ
マー装置3にて測定する。測定した時間差が予め設定し
ておいた値を上回った場合には異常検出装置7にて異常
予知警報が出力され、ボイラの使用者等へ詰まりが進行
していることを伝える。完全に詰まることで水位検出筒
4の水位が上昇しなくなっているのであれば水位検出は
行えないが、完全に詰まっているのでなければ水位の検
出は行うことができるので、すぐにボイラの運転を止め
る必要はない。しかし、できるだけ早い時期に修理等を
行うことで水位検出筒連絡管6が完全に詰まる前に対応
を行うようにする。[0008] The boiler periodically discharges all water in the can and removes sludge, etc., and periodically performs all blows. When the can water is exhausted by all the blows, all the water level detecting electrode rods detect the absence of water. . Thereafter, when water is supplied into the boiler 5 by the water supply pump 2, the water level rises in the boiler and the two water level detection cylinders 4. Of the electrode rods E3 and E4, from the time when the water presence detection signal on the side that has detected the presence of water first reaches the timer device 3 until the water presence detection signal from the other electrode rod reaches the timer device 3 The time difference is measured by the timer device 3. When the measured time difference exceeds a preset value, the abnormality detection device 7 outputs an abnormality prediction alarm to notify a user of the boiler that clogging is progressing. The water level cannot be detected if the water level of the water level detection cylinder 4 does not rise due to complete clogging, but the water level can be detected if the water level is not completely clogged. There is no need to stop. However, by performing repairs and the like as early as possible, measures are taken before the water level detection pipe connecting pipe 6 is completely clogged.
【0009】ボイラの水位は、ボイラ内部分の缶水の圧
力によって定まる水位検出筒4内の水位を検出すること
で求めているものであり、水位検出筒連絡管6内が詰ま
り、圧力が伝わらなくなると正確な水位検出が行えなく
なる。水位検出筒連絡管6の詰まりは突然発生するので
はなく、徐々に進行するものであるが、完全に詰まるま
では缶内水位に合わせて水位検出筒4内水位が変動する
ため、水位検出筒連絡管6の詰まりが進行していること
は通常検出できない。しかし、詰まりが進行しており水
位検出筒連絡管6断面の流路面積が狭まった場合、全ブ
ロー後の給水時に該水位検出筒連絡管を通して水位検出
筒4へ送られる水量は、正常な水位検出筒連絡管を通し
て水位検出筒へ送られる水量よりも減少するため、水位
検出筒内の水位上昇が遅れ、電極棒E3と電極棒E4を
同じ高さに設けていても水有りの検出開始の時間に差が
生じる。時間の差が水面の揺れなどによるものでなく、
予め設定しておいた異常と判断できるだけの値以上であ
ると、詰まりが進行していると判断できる。The water level of the boiler is determined by detecting the water level in the water level detection cylinder 4 determined by the pressure of the canned water in the boiler. The water level detection cylinder communication pipe 6 is clogged, and the pressure is transmitted. Otherwise, accurate water level detection cannot be performed. The clogging of the water level detection pipe connecting pipe 6 does not occur suddenly but proceeds gradually, but the water level in the water level detection pipe 4 fluctuates in accordance with the water level in the can until it is completely clogged. The progress of the clogging of the connecting pipe 6 cannot usually be detected. However, if clogging is progressing and the flow area of the cross section of the water level detection pipe connecting pipe 6 is narrowed, the amount of water sent to the water level detection pipe 4 through the water level detection pipe connecting pipe at the time of water supply after full blow is normal Since the amount of water sent to the water level detection cylinder through the detection pipe connecting pipe is reduced, the rise of the water level in the water level detection cylinder is delayed, and even if the electrode rod E3 and the electrode rod E4 are provided at the same height, the detection of the presence of water is started. There is a difference in time. The time difference is not due to the shaking of the water surface,
If the value is equal to or larger than a value that can be determined as an abnormality set in advance, it can be determined that clogging is in progress.
【0010】[0010]
【発明の効果】本発明を実施することで、水位検出筒連
絡管が完全に詰まる前の段階で詰まりを予知することが
でき、ボイラの運転の都合にあわせて修理等を行うこと
でボイラの突然の停止を防止することができる。By implementing the present invention, clogging can be predicted at a stage before the water level detecting tube connecting pipe is completely clogged, and repairing or the like can be performed according to the convenience of operation of the boiler. A sudden stop can be prevented.
【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.
3 タイマー装置 4 水位検出筒 6 水位検出筒連絡管 7 異常検出装置 10 水位検出用電極棒 11 制御装置 Reference Signs List 3 Timer device 4 Water level detection tube 6 Water level detection tube connecting pipe 7 Abnormality detection device 10 Electrode for water level detection 11 Control device
Claims (1)
分のそれぞれに水位検出筒連絡管によって接続させた水
位検出筒を設け、水位検出筒内に設けた水位検出用電極
棒にて検出される水位に応じて給水を制御しているボイ
ラにおいて、前記水位検出筒とは別にもう一つの水位検
出筒を設け、2個の水位検出筒内にそれぞれ同一の高さ
で水の有無を検出する水位検出用電極棒と、全ブロー実
施後の給水時に前記2本の水位検出用電極棒による水有
り検出を開始する時間の差を測定するタイマー装置を設
けておき、タイマー装置にて測定された差の値が所定の
値よりも大きかった場合には異常予知信号を出力するこ
とを特徴とするボイラの水位検出筒連絡管詰まり検出装
置。1. A water level detecting cylinder connected to a water level detecting cylinder connecting pipe in each of an upper steam portion and a lower can water portion in a boiler, and detection is performed by a water level detecting electrode rod provided in the water level detecting tube. In a boiler that controls water supply in accordance with the water level to be provided, another water level detection cylinder is provided separately from the water level detection cylinder, and the presence or absence of water is detected at the same height in each of the two water level detection cylinders. A water level detection electrode rod to be provided, and a timer device for measuring a difference in time to start detection of presence of water by the two water level detection electrode rods at the time of water supply after performing all the blows, and the measurement is performed by the timer device. A boiler water level detection cylinder connecting pipe blockage detection device, which outputs an abnormality prediction signal when the difference value is greater than a predetermined value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12018597A JP3443274B2 (en) | 1997-04-22 | 1997-04-22 | Boiler water level detection tube communication tube blockage detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12018597A JP3443274B2 (en) | 1997-04-22 | 1997-04-22 | Boiler water level detection tube communication tube blockage detection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10300009A true JPH10300009A (en) | 1998-11-13 |
JP3443274B2 JP3443274B2 (en) | 2003-09-02 |
Family
ID=14780022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12018597A Expired - Fee Related JP3443274B2 (en) | 1997-04-22 | 1997-04-22 | Boiler water level detection tube communication tube blockage detection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3443274B2 (en) |
-
1997
- 1997-04-22 JP JP12018597A patent/JP3443274B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP3443274B2 (en) | 2003-09-02 |
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