JPH0631316Y2 - Combustion control device for three-position control boiler - Google Patents
Combustion control device for three-position control boilerInfo
- Publication number
- JPH0631316Y2 JPH0631316Y2 JP5727589U JP5727589U JPH0631316Y2 JP H0631316 Y2 JPH0631316 Y2 JP H0631316Y2 JP 5727589 U JP5727589 U JP 5727589U JP 5727589 U JP5727589 U JP 5727589U JP H0631316 Y2 JPH0631316 Y2 JP H0631316Y2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- misfire
- boiler
- low
- control device
- 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 - Lifetime
Links
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、不着火時及び失火時のリサイクル機能を有
する三位置制御式ボイラーの燃焼制御装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a combustion control device for a three-position control type boiler having a recycling function at the time of misfire and at the time of misfire.
従来、不着火になったときや燃焼中に失火したときに
は、燃焼機器を自動的に再起動させる、リサイクル機能
を有するボイラーは公知である。このようなリサイクル
機能を有するボイラーは、再起動させてうまく再着火で
きるとそのまま運転を継続するが、再着火できなければ
失火インターロックがかかり警報を発するように制御さ
れる。Conventionally, a boiler having a recycling function is known, which automatically restarts a combustion device when a misfire occurs or a misfire occurs during combustion. When a boiler having such a recycling function is restarted and successfully reignited, it continues to operate as it is, but if it cannot be reignited, a misfire interlock is activated and an alarm is issued.
上述のリサイクル機能を、高燃焼・低燃焼・停止の三段
階で燃焼量を制御する三位置制御式ボイラーに採用した
場合、次のような問題点がある。When the above-mentioned recycling function is applied to a three-position control type boiler that controls the combustion amount in three stages of high combustion, low combustion and stop, there are the following problems.
通常、三位置制御式のボイラーにおいて着火動作を行う
ときは、まず低燃焼状態で着火動作を行い、着火に成功
後、高燃焼指示信号が出ていれば所定時間(数秒)経過
後に高燃焼へ移行させる(第3図参照)。しかるに、何
らかの不具合(例えば風量異常)が発生して低燃焼から
高燃焼移行時に失火した場合、再着火動作を行って低燃
焼状態ではうまく燃えても低燃焼から高燃焼移行時に再
び失火してしまうことがある。再着火時に不着火になれ
ば、失火インターロックがかかるが、一度火がつくとそ
の前の失火発生信号がリセットされるため、上述のケー
スにおいては短いサイクルで着火と失火を繰り返すこと
になり、ボイラーの安全上問題が発生する。Normally, when performing an ignition operation in a three-position control type boiler, first perform the ignition operation in a low combustion state, and after successful ignition, if a high combustion instruction signal is output, go to high combustion after a predetermined time (several seconds) has elapsed. Transfer (see Fig. 3). However, if some kind of malfunction (for example, an abnormal amount of air flow) occurs and misfire occurs during transition from low combustion to high combustion, reignition operation is performed and even if it burns well in the low combustion state, it will misfire again during transition from low combustion to high combustion. Sometimes. If a misfire occurs during re-ignition, the misfire interlock will be applied, but since the misfire occurrence signal before that will be reset once the fire is reached, in the above case, ignition and misfire will be repeated in a short cycle, Boiler safety issues occur.
この考案は、上述の問題点に鑑み、低燃焼から高燃焼移
行時に失火が発生した場合の安全燃焼制御を実現しよう
とするものであり、具体的には、失火時のリサイクル機
能を有する燃焼制御機構を備えた三位置制御式ボイラー
において、燃焼途中に失火が発生した場合、低燃焼状態
から高燃焼状態移行時の失火であるか否かを判別し、こ
のときの燃焼移行時の失火が繰り返して発生したときに
ボイラーを再起動させないで停止させるように働く判別
器を設けたことを特徴としている。In view of the above problems, the present invention is intended to realize safe combustion control when misfire occurs during transition from low combustion to high combustion, and specifically, combustion control having a recycling function at the time of misfire. In a three-position control boiler equipped with a mechanism, if a misfire occurs during combustion, it is determined whether or not there is a misfire when transitioning from a low combustion state to a high combustion state. It is characterized by the provision of a discriminator that works to stop the boiler without restarting it when it occurs.
この考案の燃焼制御装置によれば、低燃焼状態から高燃
焼状態移行時の失火が繰り返して発生したとき、それを
判別して、ボイラーを再起動させないように失火インタ
ーロックをかけることができ、安全性の高い燃焼制御装
置を提供することができる。According to the combustion control device of the present invention, when the misfire during the transition from the low combustion state to the high combustion state occurs repeatedly, it is possible to determine it and apply the misfire interlock so as not to restart the boiler, A highly safe combustion control device can be provided.
以下、この考案の好ましい実施例を図面に基づいて説明
する。A preferred embodiment of the present invention will be described below with reference to the drawings.
図中(1)はボイラーで、加熱用のバーナ(3)を備えてい
る。燃焼用空気は、バーナ(3)と送風機(4)とを送風ダク
ト(5)によって接続し、この送風ダクトを通して送るよ
うにしている。送風ダクト(5)の途中には、風量を調節
するためのダンパー(6)を設けてあって、その作動をダ
ンパー駆動手段(7)によって操作可能にしているが、こ
れにより、高燃焼用風量と低燃焼用風量の二通りの制御
のために、前記ダンパーは高燃焼位置と低燃焼位置の二
位置間を選択的に移動する。In the figure, (1) is a boiler equipped with a burner (3) for heating. The combustion air connects the burner (3) and the blower (4) by a blower duct (5) and is sent through this blower duct. A damper (6) for adjusting the air volume is provided in the air duct (5), and its operation can be operated by the damper drive means (7). The damper is selectively moved between two positions, a high combustion position and a low combustion position, in order to control the low combustion air volume and the low combustion air volume.
前記バーナ(3)には燃料供給ライン(8)を接続し、このラ
インに挿設した燃料ポンプ(9)の下流側を高燃焼用ライ
ンと低燃焼用ラインに分岐して、それぞれの分岐ライン
に高燃焼用電磁弁(10)、低燃焼用電磁弁(11)を各別に挿
入している。高燃焼時には高燃焼用電磁弁(10)と低燃焼
用電磁弁(11)の両方を開、低燃焼時には低燃焼用電磁弁
(11)のみ開とし、高燃焼と低燃焼の切替えは、高燃焼用
電磁弁(10)の開閉動作に従うようにする。(12)は火炎検
出センサーであり、火炎の有無、即ち失火の発生を検出
する。A fuel supply line (8) is connected to the burner (3), the downstream side of a fuel pump (9) inserted in this line is branched into a high combustion line and a low combustion line, and the respective branch lines A solenoid valve for high combustion (10) and a solenoid valve for low combustion (11) are inserted separately in the. Open both high combustion solenoid valve (10) and low combustion solenoid valve (11) during high combustion, and low combustion solenoid valve during low combustion
Only (11) is opened, and switching between high combustion and low combustion follows the opening / closing operation of the high combustion solenoid valve (10). (12) is a flame detection sensor that detects the presence or absence of flame, that is, the occurrence of misfire.
高燃焼、低燃焼、停止の各運転状態のうちどの運転状態
を選択するかは、ボイラー缶内圧を検出する圧力検出器
(13)の信号に基づいて燃焼制御回路(2)により制御す
る。前記圧力検出器としては、例えば高設定圧力値と低
設定圧力値の2つの設定圧力値を有する圧力スイッチPS
を用い、低設定圧力値以下の圧力においては高燃焼、低
設定圧力値と高設定圧力値の間の圧力においては低燃
焼、高設定圧力値以上の圧力においては停止の状態にな
るように制御する。The pressure detector that detects the internal pressure of the boiler can determine which operating state, high combustion, low combustion, or stop, is selected.
It is controlled by the combustion control circuit (2) based on the signal of (13). The pressure detector may be, for example, a pressure switch PS having two set pressure values, a high set pressure value and a low set pressure value.
Control to control high combustion at pressures below the low set pressure value, low combustion at pressures between the low and high set pressure values, and stop at pressures above the high set pressure value. To do.
(14)はボイラー缶内の水位を検出するための水位検出器
であり、この検出器の信号に基づいて、適宜の水位制御
装置により、給水ライン(15)中の給水ポンプ(16)をON
−OFF稼動させ、缶内の水位を一定のレベルに保つ。(14) is a water level detector for detecting the water level in the boiler can. Based on the signal from this detector, an appropriate water level control device turns on the water supply pump (16) in the water supply line (15).
-Turn off to keep the water level in the can at a certain level.
以上のような構成の装置において燃焼中に失火が発生し
た場合は(第2図参照)、それが低燃焼Lから高燃焼H
移行時の失火かどうかを判別器(17)で判別し、低燃焼L
から高燃焼H移行時の失火が繰り返して発生したとき、
ボイラーを再起動させないように失火インターロックを
かけてボイラーを停止させるように制御する。When misfire occurs during combustion in the device having the above-described configuration (see FIG. 2), it is from low combustion L to high combustion H.
It is determined by the discriminator (17) whether it is a misfire at the time of transition, low combustion L
When repeated misfires occur during transition from high combustion H to
It controls to stop the boiler with a misfire interlock so that the boiler is not restarted.
尚、上記の低燃焼から高燃焼移行時以外の低燃焼中及び
高燃焼中の失火については、再着火できればその前の失
火発生信号をリセットしてボイラーの運転を継続し、再
着火動作時に不着火になれば失火インターロックをかけ
てボイラーを停止させるようにし、従来のものと同様な
制御を行う。Regarding misfires during low combustion and high combustion other than when transitioning from low combustion to high combustion described above, if reignition is possible, the misfire occurrence signal before that is reset and the boiler operation is continued, and during the reignition operation When ignition occurs, a misfire interlock is applied to stop the boiler and control similar to the conventional one is performed.
この考案は、以上のような構成であり、低燃焼状態から
高燃焼状態移行時の失火が繰り返して発生しても、それ
を判別して、ボイラーを再起動させないように失火イン
ターロックをかけることができ、従来発生していた着火
と失火を短いサイクルで繰り返すという問題を解決し、
送風系統や燃料系統等に異常が発生したままの危険な状
態での運転の継続を防ぐことが可能で、安全性の高い燃
焼制御装置を提供することができる。また、着火と失火
の繰り返しに伴う燃焼制御機器の発停回数の増加を防止
でき、燃焼制御機器の耐久性の向上につながる。The present invention is configured as described above, and even if misfire occurs repeatedly when transitioning from a low combustion state to a high combustion state, it is determined and a misfire interlock is applied to prevent restarting the boiler. It solved the problem of repeating ignition and misfire that occurred conventionally in a short cycle,
It is possible to prevent continuation of operation in a dangerous state where an abnormality occurs in the blower system, the fuel system, etc., and it is possible to provide a highly safe combustion control device. Further, it is possible to prevent an increase in the number of times of starting and stopping the combustion control device due to repeated ignition and misfire, which leads to improvement in durability of the combustion control device.
第1図はこの考案の一実施例を示す系統図、第2図はこ
の考案における燃焼制御の一例を示すフローチャート、
第3図は三位置制御式ボイラーの着火動作の一例を示す
タイムチャートである。 (1)…ボイラー、(2)…燃焼制御回路 (3)…バーナ、(8)…燃料供給ライン (12)火炎検出センサー、(15)…給水ライン (17)…判別器FIG. 1 is a system diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing an example of combustion control in the present invention.
FIG. 3 is a time chart showing an example of the ignition operation of the three-position control type boiler. (1) ... Boiler, (2) ... Combustion control circuit (3) ... Burner, (8) ... Fuel supply line (12) Flame detection sensor, (15) ... Water supply line (17) ... Discriminator
Claims (1)
機構を備えた三位置制御式ボイラーにおいて、燃焼途中
に失火が発生した場合、低燃焼状態から高燃焼状態移行
時の失火であるか否かを判別し、このときの燃焼移行時
の失火が繰り返して発生したときにボイラーを再起動さ
せないで停止させるように働く判別器(17)を設けたこと
を特徴とする三位置制御式ボイラーの燃焼制御装置。1. In a three-position control type boiler having a combustion control mechanism having a recycling function at the time of misfire, when misfire occurs during combustion, whether or not the misfire is at the transition from a low combustion state to a high combustion state. Combustion of a three-position control type boiler characterized by being equipped with a discriminator (17) that works to stop the boiler without restarting it when repeated misfires occur during combustion transition at this time. Control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5727589U JPH0631316Y2 (en) | 1989-05-17 | 1989-05-17 | Combustion control device for three-position control boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5727589U JPH0631316Y2 (en) | 1989-05-17 | 1989-05-17 | Combustion control device for three-position control boiler |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02147649U JPH02147649U (en) | 1990-12-14 |
JPH0631316Y2 true JPH0631316Y2 (en) | 1994-08-22 |
Family
ID=31581838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5727589U Expired - Lifetime JPH0631316Y2 (en) | 1989-05-17 | 1989-05-17 | Combustion control device for three-position control boiler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0631316Y2 (en) |
-
1989
- 1989-05-17 JP JP5727589U patent/JPH0631316Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02147649U (en) | 1990-12-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |