JPH08178206A - Water-level control in boiler - Google Patents
Water-level control in boilerInfo
- Publication number
- JPH08178206A JPH08178206A JP33880094A JP33880094A JPH08178206A JP H08178206 A JPH08178206 A JP H08178206A JP 33880094 A JP33880094 A JP 33880094A JP 33880094 A JP33880094 A JP 33880094A JP H08178206 A JPH08178206 A JP H08178206A
- Authority
- JP
- Japan
- Prior art keywords
- water level
- boiler
- water
- low water
- electrode rod
- 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】この発明は、ボイラに付設の水位
制御装置の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 control method of a water level control device attached to a boiler.
【０００２】[0002]
【従来の技術】一般に、ボイラの給水制御は、例えば、
図３に示すように、ボイラの上部ヘッダ（図示省略）と
下部ヘッダ（図示省略）との間を配管で連通し途中に水
位制御筒を挿設している。この水位制御筒内に高水位
（Ｓ），中水位（Ｍ），低水位（Ｌ）に対応する電極棒
がそれぞれ挿入してあって、この電極棒Ｓ，Ｍ，Ｌの検
出信号に基づき適宜の水位制御装置（図示省略）を介し
て給水制御を行なっている。すなわち、前記高水位電極
棒（Ｓ）が水位を検知すれば給水ポンプを停止し、水位
が前記中間水位電極棒（Ｍ）を切れば前記給水ポンプを
駆動して給水する。そして、一時的な給水系の異常等に
より水位が前記低水位制御棒（Ｌ）を切れば、前記ボイ
ラの燃焼装置ほか制御機構にインターロックをかけ異常
点検を行なうようにしている。2. Description of the Related Art Generally, water supply control of a boiler is performed by, for example,
As shown in FIG. 3, a water level control tube is inserted midway between the upper header (not shown) and the lower header (not shown) of the boiler by piping. Electrode rods corresponding to a high water level (S), a medium water level (M), and a low water level (L) are inserted in the water level control cylinder, respectively. Based on the detection signals of the electrode rods S, M, L Water supply control is performed via the water level control device (not shown). That is, when the high water level electrode rod (S) detects the water level, the water supply pump is stopped, and when the water level cuts the intermediate water level electrode rod (M), the water supply pump is driven to supply water. If the water level cuts off the low water level control rod (L) due to a temporary abnormality of the water supply system or the like, an interlock is provided to the combustion device of the boiler and the control mechanism to perform an abnormality check.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、例えば
一時的な給水系の異常等により水位が低下しても直ぐ原
因が解除され水位が上昇する場合は、前記ボイラにイン
ターロックをかけることにより、一時的に蒸気の供給が
停止してしまい、さらに再起動するための操作等の弊害
が発生することになる。そこでこの発明は、一時的な現
象によりボイラにインターロックをかけることを回避す
る水位制御方法を提供することを目的とするものであ
る。However, even if the water level is lowered due to a temporary abnormality of the water supply system or the like, the cause is immediately resolved and the water level rises. As a result, the supply of steam is stopped, which causes adverse effects such as an operation for restarting. Then, this invention aims at providing the water level control method which avoids interlocking a boiler by a temporary phenomenon.
【０００４】[0004]
【課題を解決するための手段】この発明は、前記課題を
解決するためになされたものであって、ボイラに付設の
電極棒を備えた構成の水位制御装置において、前記電極
棒が低水位を検出したときから、予め設定したＴ1 時間
に達したとき燃焼を停止し、さらに前記電極棒が低水位
を検出したときから、予め設定したＴ2 時間までに前記
低水位まで水位が上昇しないときは、限界低水位と判断
して前記ボイラにインターロックをかけることを特徴と
している。The present invention has been made to solve the above problems, and in a water level control device having an electrode rod attached to a boiler, the electrode rod has a low water level. Combustion is stopped when the preset T 1 time is reached from the time of detection, and when the water level does not rise to the low water level by the preset T 2 time from when the electrode rod detects the low water level. Is characterized by interlocking the boiler when it is judged to be at a critically low water level.
【０００５】[0005]
【作用】この発明によれば、低水位を検出した電極棒の
検出信号から、予め設定したＴ1 時間に達したとき燃焼
を停止し、さらに低水位を検出した電極棒の検出信号か
ら、予め設定したＴ2 時間までに前記低水位まで水位が
上昇しないときはインターロックをかける。According to the present invention, from the detection signal of the electrode rod which has detected the low water level, the combustion is stopped when the preset T 1 time is reached, and from the detection signal of the electrode rod which has detected the low water level, If the water level does not rise to the low water level by the set T 2 time, interlock is applied.
【０００６】[0006]
【実施例】以下、この発明の実施例を図面に基づいて詳
細に説明する。図１は、この発明を実施した多管式貫流
ボイラ１の概略説明図であって、符号２は缶体で、環状
に形成した上部ヘッダ３と下部ヘッダ４との間を多数の
水管５で連結し中央部に燃焼室６を形成している。この
燃焼室６の上部に加熱手段としてのバーナ７を配置し、
このバーナ７に燃料供給ライン８を接続し途中に燃料ポ
ンプ９および電磁弁１０を挿入している。そして、前記
缶体２の外側に缶体内の水位を制御する水位制御装置１
１を設けている。この水位制御装置１１は、前記上部ヘ
ッダ３と下部ヘッダ４との間を配管１２で連通し途中に
水位制御筒１３を挿設し、この水位制御筒１３内に高水
位（Ｓ），中水位（Ｍ），低水位（Ｌ）に対応する電極
棒１４をそれぞれ挿入し、この各電極棒１４（Ｓ）
（Ｍ）（Ｌ）の検出信号を回線１５を介して制御器１６
へ通報するようにしている。前記下部ヘッダ４には給水
ポンプ１７を備えた給水ライン１８が接続してある。そ
して、前記制御器１６には前記燃料ポンプ９および給水
ポンプ１７を回線１５を介してそれぞれ接続している。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic explanatory view of a multi-tube type once-through boiler 1 embodying the present invention, in which reference numeral 2 is a can body, and a large number of water pipes 5 are provided between an upper header 3 and a lower header 4 which are annularly formed. Combustion chamber 6 is formed in the central portion by connecting them. A burner 7 as a heating means is arranged above the combustion chamber 6,
A fuel supply line 8 is connected to the burner 7, and a fuel pump 9 and a solenoid valve 10 are inserted midway. Then, a water level control device 1 for controlling the water level inside the can body 2 outside the can body 2.
1 is provided. In this water level control device 11, a water level control tube 13 is inserted between the upper header 3 and the lower header 4 through a pipe 12, and a high water level (S) and a medium water level are inserted in the water level control tube 13. (M), the electrode rod 14 corresponding to the low water level (L) is inserted, and each electrode rod 14 (S)
The detection signals (M) and (L) are sent to the controller 16 via the line 15.
I am trying to report to. A water supply line 18 having a water supply pump 17 is connected to the lower header 4. The fuel pump 9 and the water supply pump 17 are connected to the controller 16 via a line 15.
【０００７】上記構成の多管式貫流ボイラ１の水位制御
方法は、起動時においては制御器１６の信号によって給
水ポンプ１７を駆動し給水ライン１８から水管５内へ給
水し、水位制御筒１３の高水位電極棒（Ｓ）が水位を検
知すれば回線１５を介して制御器１６へ通報し前記給水
ポンプ１７を停止する。そして、前記制御器１６からの
信号によって燃料ポンプ９を駆動するとともにバーナ７
を燃焼させる。前記バーナ７の燃焼により水位が低下
し、水位が中水位電極棒（Ｍ）の下端を切ると信号を発
し、前記制御器１６を介して前記給水ポンプ１７を駆動
し、前記高水位電極棒（Ｓ）まで水位が上昇すると前記
給水ポンプ１７を停止する。In the water level control method for the multi-tube once-through boiler 1 having the above-described structure, at the time of start-up, the water supply pump 17 is driven by the signal from the controller 16 to supply water into the water pipe 5 from the water supply line 18, and the water level control cylinder 13 is operated. When the high water level electrode rod (S) detects the water level, it notifies the controller 16 via the line 15 to stop the water supply pump 17. The fuel pump 9 is driven by the signal from the controller 16 and the burner 7 is driven.
To burn. When the burner 7 burns to lower the water level and the water level cuts the lower end of the middle water level electrode rod (M), a signal is emitted, the water supply pump 17 is driven through the controller 16, and the high water level electrode rod ( When the water level rises to S), the water supply pump 17 is stopped.
【０００８】この発明に係る水位制御方法は、前記ボイ
ラ１の通常稼動中において、一時的な給水系の異常等に
より前記給水ポンプ１７からの給水量が缶水の必要消費
水量より減少することがある。そのため、水位が低下し
て前記低水位電極棒（Ｌ）の下端を切ると信号を発し、
この信号を受信した前記制御器１６は、図２に示すフロ
ーチャートのように、予め設定したＴ1 時間に達すると
燃焼を停止し、さらに、前記低水位電極棒（Ｌ）の信号
から予め設定したＴ2 時間までは、前記ボイラ１の燃焼
を停止することにより水位の復帰を促進させ、前記Ｔ2
時間までに前記低水位まで水位が上昇しないときは、限
界低水位と判断して前記ボイラ１にインターロックをか
け異常を点検する。尚、前記限界低水位になる要因とし
ては、前記給水ポンプ１７の故障、または性能低下等が
あるが限界低水位を判断してインターロックをかけるの
で安全上の問題はない。In the water level control method according to the present invention, during normal operation of the boiler 1, the water supply amount from the water supply pump 17 may be reduced from the required water consumption amount of the canned water due to a temporary abnormality of the water supply system or the like. is there. Therefore, when the water level drops and the lower end of the low water level electrode rod (L) is cut, a signal is emitted,
Upon receipt of this signal, the controller 16 stops combustion when the preset T 1 time is reached, and further presets from the signal of the low water level electrode rod (L) as shown in the flowchart of FIG. T up to 2 hours, to promote the return of the water level by stopping the combustion of the boiler 1, the T 2
When the water level does not rise to the low water level by the time, it is judged to be the critical low water level and the boiler 1 is interlocked to check the abnormality. Incidentally, as a factor of the limit low water level, there is a failure of the water supply pump 17, performance deterioration, or the like, but there is no safety problem because an interlock is made by determining the limit low water level.
【０００９】[0009]
【発明の効果】以上説明したように、この発明によれ
ば、水位制御装置の電極棒が低水位を検出したときか
ら、予め設定したＴ1 時間に達すると燃焼を停止し、さ
らに電極棒が低水位を検出したときから、予め設定した
Ｔ2 時間までに前記低水位まで水位が上昇しないとき
は、限界低水位と判断してボイラにインターロックをか
けるようにしたので、一時的な給水系の異常等により水
位が前記電極棒を切っても、前記Ｔ2 時間までに水位が
上昇すれば前記ボイラにインターロックをかけることを
回避することができる。したがって、インターロックを
かけることによるボイラの一時停止等の弊害をなくし、
効率的にボイラを運転することができる。As described above, according to the present invention, the combustion is stopped when the preset time T 1 is reached from when the electrode rod of the water level control device detects the low water level, and the electrode rod is If the water level does not rise to the low water level within a preset time T 2 after the low water level is detected, the boiler is judged to be the critical low water level and the boiler is interlocked. Turning off the abnormality the electrode rod water level, it is possible to avoid subjecting the interlock on the boiler if rising water level until the T 2 hours. Therefore, the harmful effects such as the temporary stop of the boiler due to the interlock are eliminated,
The boiler can be operated efficiently.
【図１】この発明を実施した多管式貫流ボイラの概略説
明図である。FIG. 1 is a schematic explanatory view of a multi-tube once-through boiler embodying the present invention.
【図２】この発明の水位制御方法のフローチャートであ
る。FIG. 2 is a flow chart of a water level control method of the present invention.
【図３】複数の電極棒を備えた水位制御筒の概略説明図
である。FIG. 3 is a schematic explanatory view of a water level control cylinder provided with a plurality of electrode rods.
１ ボイラ １１ 水位制御装置 １４ 電極棒 1 Boiler 11 Water level control device 14 Electrode rod
───────────────────────────────────────────────────── フロントページの続き (72)発明者 重松 信義 愛媛県松山市堀江町７番地 三浦工業株式 会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyoshi Shigematsu 7 Horie-cho, Matsuyama-shi, Ehime Miura Industrial Co., Ltd.
Claims (1)
成の水位制御装置１１において、前記電極棒１４が低水
位を検出したときから、予め設定したＴ1 時間に達した
とき燃焼を停止し、さらに前記電極棒１４が低水位を検
出したときから、予め設定したＴ2 時間までに前記低水
位まで水位が上昇しないときは、限界低水位と判断して
前記ボイラ１にインターロックをかけることを特徴とす
るボイラの水位制御方法。1. A water level control device 11 having an electrode rod 14 attached to a boiler 1, wherein combustion is stopped when a preset water level T 1 is reached after the electrode rod 14 detects a low water level. If the water level does not rise to the low water level within a preset time T 2 from the time when the electrode rod 14 detects the low water level, the boiler 1 is judged to be a critical low water level and the boiler 1 is interlocked. A water level control method for a boiler, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33880094A JP2785729B2 (en) | 1994-12-28 | 1994-12-28 | Boiler water level control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33880094A JP2785729B2 (en) | 1994-12-28 | 1994-12-28 | Boiler water level control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08178206A true JPH08178206A (en) | 1996-07-12 |
| JP2785729B2 JP2785729B2 (en) | 1998-08-13 |
Family
ID=18321596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33880094A Expired - Lifetime JP2785729B2 (en) | 1994-12-28 | 1994-12-28 | Boiler water level control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2785729B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007255839A (en) * | 2006-03-24 | 2007-10-04 | Sanyo Electric Co Ltd | Low-water cut off control method for direct fired absorption refrigerating machine |
| JP2010071770A (en) * | 2008-09-17 | 2010-04-02 | Miura Co Ltd | Liquid level detector |
| CN103206701A (en) * | 2013-03-27 | 2013-07-17 | 江苏维德锅炉有限公司 | Liquid level control voice alarm |
| JP2021063619A (en) * | 2019-10-16 | 2021-04-22 | 三浦工業株式会社 | Control device for boiler |
-
1994
- 1994-12-28 JP JP33880094A patent/JP2785729B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007255839A (en) * | 2006-03-24 | 2007-10-04 | Sanyo Electric Co Ltd | Low-water cut off control method for direct fired absorption refrigerating machine |
| JP2010071770A (en) * | 2008-09-17 | 2010-04-02 | Miura Co Ltd | Liquid level detector |
| CN103206701A (en) * | 2013-03-27 | 2013-07-17 | 江苏维德锅炉有限公司 | Liquid level control voice alarm |
| JP2021063619A (en) * | 2019-10-16 | 2021-04-22 | 三浦工業株式会社 | Control device for boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2785729B2 (en) | 1998-08-13 |
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