JP2552995Y2 - Gas fired boiler combustion control device - Google Patents
Gas fired boiler combustion control deviceInfo
- Publication number
- JP2552995Y2 JP2552995Y2 JP1990107058U JP10705890U JP2552995Y2 JP 2552995 Y2 JP2552995 Y2 JP 2552995Y2 JP 1990107058 U JP1990107058 U JP 1990107058U JP 10705890 U JP10705890 U JP 10705890U JP 2552995 Y2 JP2552995 Y2 JP 2552995Y2
- Authority
- JP
- Japan
- Prior art keywords
- steam
- combustion
- heat request
- control device
- combustion control
- 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
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Control Of Combustion (AREA)
Description
【考案の詳細な説明】 (産業上の利用分野) 本考案はON・OFF燃焼制御もしくは三位置燃焼制御を
おこなっているガス焚きボイラの燃焼制御装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a combustion control device for a gas-fired boiler that performs ON / OFF combustion control or three-position combustion control.
(従来の技術とその問題点) 熱要求検出装置によって、ON・OFF燃焼制御もしくは
三位置燃焼制御をおこなっている小型ガス焚きボイラ
は、図2に示すように、蒸気圧力を検出している熱要求
検出装置からの熱要求停止信号を受けて燃焼を停止し、
熱要求検出装置より熱要求信号を受けて燃焼を開始す
る。蒸気圧力が下限圧力まで低下して燃焼を開始する場
合、ボイラはメーンバーナが着火するまで、プリパー
ジ、パイロットバーナ点火、パイロットバーナ点火確認
と40秒から1分近くの燃焼準備時間を要するため、実際
に燃焼を開始させるのは下限圧力よりも低い圧力とな
る。そのため、蒸気需要量が多い時、メーンバーナの着
火までに蒸気圧力が負荷側に支障をきたす要求圧力以下
に低下してしまうといった問題点が発生する。そのため
燃焼準備時間分早くなるように下限圧力を設定すると、
蒸気の使用を停止している場合など蒸気使用量が少ない
場合、蒸気圧力が要求圧力以下に低下しても、その場合
には蒸気が使われていないので影響はほとんど無いが、
高く狭い範囲に蒸気圧を保たなければならず熱の損失が
大きくなり、無駄な燃焼発停が頻発するため好ましくな
い。(Conventional technology and its problems) A small gas-fired boiler that performs ON / OFF combustion control or three-position combustion control using a heat demand detection device, as shown in FIG. Stops combustion in response to a heat request stop signal from the request detection device,
The combustion is started in response to a heat request signal from the heat request detection device. When the steam pressure drops to the lower limit pressure and starts combustion, the boiler requires pre-purge, pilot burner ignition, pilot burner ignition confirmation and combustion preparation time from 40 seconds to nearly 1 minute until the main burner ignites. Combustion starts at a pressure lower than the lower limit pressure. For this reason, when the steam demand is large, there is a problem that the steam pressure drops below the required pressure that hinders the load side by the time the main burner is ignited. Therefore, if the lower limit pressure is set so as to be earlier by the combustion preparation time,
If the amount of steam used is low, such as when the use of steam is stopped, even if the steam pressure drops below the required pressure, there is almost no effect since steam is not used in that case, but
The steam pressure must be maintained in a high and narrow range, and the heat loss is increased, and wasteful combustion start and stop frequently occurs.
(考案の目的) 本考案は上記のような問題点を鑑みてなされたもの
で、その目的は蒸気需要量が多い時には蒸気圧力を要求
圧力以下に低下させないようにし、かつ蒸気需要量が少
ない時の不必要な発停を低減した、負荷追従の高く、安
定した蒸気の供給の可能な燃焼制御装置を提供すること
にある。(Purpose of the invention) The present invention has been made in view of the above-mentioned problems. The purpose of the invention is to prevent the steam pressure from dropping below the required pressure when the steam demand is large and to reduce the steam pressure when the steam demand is small. It is an object of the present invention to provide a combustion control device which reduces unnecessary start and stop, has high load following, and can supply steam stably.
(問題点解決のための手段) 上記の目的を達成するために、燃焼停止中の上部管寄
せ内の蒸気温度を計測するための温度センサーを取り付
け、熱要求検出装置として圧力SWもしくは圧力センサー
を取り付ける。(Means for solving the problems) To achieve the above object, a temperature sensor for measuring the steam temperature in the upper header during combustion stoppage is installed, and a pressure SW or pressure sensor is used as a heat demand detection device. Attach.
燃焼制御装置に組み込まれたマイコンにより、上部管寄
せ温度計測値の変化を検出し、蒸気の温度変化率を検出
する。蒸気需要量が多く、蒸気の温度変化率が設定値よ
りも大きい場合、熱要求信号が発信されるとすぐにメー
ンバーナへ着火できるように熱要求信号が発信されるよ
りも前にプリパージを開始する。蒸気需要量が少なく、
蒸気の温度変化率が設定値以下の場合、熱要求信号が発
せられた後でプリパージを開始し、その後でメーンバー
ナへ着火する。A microcomputer incorporated in the combustion control device detects a change in the measured value of the upper header temperature, and detects a temperature change rate of steam. If the steam demand is high and the temperature change rate of the steam is larger than the set value, the prepurge is started before the heat request signal is transmitted so that the main burner can be ignited as soon as the heat request signal is transmitted. . Low steam demand,
When the temperature change rate of the steam is equal to or less than the set value, the prepurge is started after the heat request signal is issued, and then the main burner is ignited.
(考案の作用) 蒸気の温度変化率を検出することによって蒸気需要量
の大小が分かり、蒸気需要量が多い場合には熱要求信号
発信前にプリパージを行っておき、熱要求信号が発信さ
れとすぐに燃焼を開始するので、蒸気圧力は熱要求信号
が発信される下限圧力よりも低くはならず、熱要求信号
が発信されてから燃焼を開始するまでに要求圧力以下に
低下する問題は発生しない。また、蒸気需要量が少ない
場合には熱要求信号発信後にプリパージを行って、その
後に燃焼を開始するので、蒸気圧力は熱要求信号が発信
される下限圧力よりも低くなるが、もともと蒸気需要量
が少ないために要求圧力以下に低下することはなく、燃
焼の発停間隔が広がるため、発停頻度を低減できる。(Operation of the invention) By detecting the temperature change rate of the steam, the magnitude of the steam demand can be determined. If the steam demand is large, prepurge is performed before the heat request signal is transmitted, and the heat request signal is transmitted. Since the combustion starts immediately, the steam pressure does not become lower than the lower limit pressure at which the heat request signal is transmitted, and the problem that the pressure drops below the required pressure from when the heat request signal is transmitted until combustion starts occurs. do not do. When the steam demand is small, the pre-purge is performed after the heat demand signal is transmitted, and then the combustion is started. Therefore, the steam pressure becomes lower than the lower limit pressure at which the heat demand signal is transmitted. , The pressure does not drop below the required pressure, and the combustion start / stop interval is widened, so that the start / stop frequency can be reduced.
熱要求信号は同じ下限圧力で発信されるが、実際に燃
料を開始するのは、蒸気需要量によって熱要求信号発進
時と熱要求信号発信から燃料準備時間経過後に分かれ、
蒸気圧力の安定と不必要な燃焼発停の防止が両立でき
る。The heat request signal is transmitted at the same lower limit pressure, but the actual start of fuel is divided depending on the amount of steam demand when the heat request signal starts and after the fuel request time elapses from the heat request signal transmission,
Stabilization of steam pressure and prevention of unnecessary combustion start / stop can be achieved at the same time.
(実施例) 本考案の実施例を図面を用いて説明する。ガス焚き貫
流ボイラの上部管寄せ2の管内温度を計測するため、温
度センサー3を設置する。ボイラ本体1に、蒸気圧力を
検出することによって熱要求信号または熱要求停止信号
を出力する熱要求検出装置4を取り付け、熱要求検出装
置は燃焼制御装置10に接続されている。また、燃焼制御
装置10には送風機8、風量切換調整器7、メーンバーナ
用電磁弁5、パイロットバーナ用電磁弁6、着火装置
9、炎検出装置(図示せず)が接続されており、燃焼制
御装置により燃焼の制御を行う。燃焼制御装置が燃焼開
始を出力すると、まず送風機を稼働することによってプ
リパージを実施し、続いてパイロットバーナ用電磁弁を
開き、着火装置を作動させてパイロットバーナを点火、
その後にメーンバーナ用電磁弁を開いてメーンバーナの
燃焼が開始され、燃焼開始を出力してからメーンバーナ
が点火するまでの燃焼準備時間TCは燃焼制御装置へ予め
入力しておく。(Example) An example of the present invention will be described with reference to the drawings. A temperature sensor 3 is installed to measure the temperature in the upper header 2 of the gas-fired once-through boiler. A heat demand detection device 4 that outputs a heat demand signal or a heat demand stop signal by detecting steam pressure is attached to the boiler main body 1, and the heat demand detection device is connected to a combustion control device 10. The combustion control device 10 is connected to a blower 8, an air volume switching regulator 7, a main burner solenoid valve 5, a pilot burner solenoid valve 6, an ignition device 9, and a flame detection device (not shown). The device controls combustion. When the combustion control device outputs the start of combustion, first, a prepurge is performed by operating the blower, then the solenoid valve for the pilot burner is opened, and the ignition device is operated to ignite the pilot burner,
After that, the main burner solenoid valve is opened to start combustion of the main burner, and a combustion preparation time TC from when the combustion start is output to when the main burner is ignited is input to the combustion control device in advance.
燃焼中に蒸気圧力が上昇し、燃焼制御装置に熱要求検
出装置から熱要求停止信号が出力されると、燃焼制御装
置は上部管寄せの管内温度を計測し、一定時間の温度の
推移を計測する。温度変化率DTが定数値CLよりも大きけ
れば蒸気需要量が大という定数値CLを設定しておき、温
度変化率DTが定数値CLよりも大きい時、温度変化率DTよ
り燃焼が必要となるまでの時間TIを求める。TIとTCを比
較し、TI>TCならばTI-TC経過時、TI<TCならば即プリ
パージを開始する。また、温度変化率DTが定数値CL以下
ならば、熱要求検出装置からの熱要求信号によりプリパ
ージを実施する。When the steam pressure rises during combustion and a heat request stop signal is output from the heat request detection device to the combustion control device, the combustion control device measures the temperature inside the pipe at the upper header and measures the temperature transition for a certain period of time. I do. If the temperature change rate DT is larger than the constant value CL, a constant value CL is set so that the steam demand is large, and when the temperature change rate DT is larger than the constant value CL, combustion is required from the temperature change rate DT. To find the time TI. Compare TI and TC. If TI> TC, pre-purge is started immediately after TI-TC, and if TI <TC. If the temperature change rate DT is equal to or less than the constant value CL, the prepurge is performed by the heat request signal from the heat request detection device.
(考案の効果) 本考案の実施により、蒸気需要量が多い場合の蒸気圧
力の低下と蒸気需要量が少ない場合の燃焼の発停頻度を
低減することができ、効率的で安定した蒸気の供給が可
能となった。(Effects of the Invention) By implementing the present invention, it is possible to reduce the steam pressure when the steam demand is large and to reduce the frequency of starting and stopping the combustion when the steam demand is small, thereby providing an efficient and stable steam supply. Became possible.
第1図は本考案の実施例を使用しているガス焚き小型ボ
イラの概要的説明図である。第2図はガスボイラの三位
置燃焼制御のタイムチャートの一例である。図3は従来
の燃焼制御の場合の蒸気圧力変化の経過を示しており、
本考案の実施例での蒸気需要量が少ない場合の蒸気圧力
変化も同様な経過を示す。第4図は本考案を実施した場
合の蒸気需要量が多い場合の蒸気圧力変化の経過図の一
例である。 1……ボイラ本体、2……上部管寄せ、3……温度セン
サー、4……熱要求検出装置、5……メーンバーナ用電
磁弁、6……パイロットバーナ用電磁弁、7……風量切
換調整器、8……送風機、9……着火装置、10……燃焼
制御装置FIG. 1 is a schematic explanatory view of a small gas-fired boiler using an embodiment of the present invention. FIG. 2 is an example of a time chart of the three-position combustion control of the gas boiler. FIG. 3 shows the progress of the steam pressure change in the case of the conventional combustion control.
In the embodiment of the present invention, the change in steam pressure when the steam demand is small shows a similar course. FIG. 4 is an example of a progress diagram of a change in steam pressure when the steam demand is large when the present invention is implemented. DESCRIPTION OF SYMBOLS 1 ... Boiler main body, 2 ... Upper header, 3 ... Temperature sensor, 4 ... Heat demand detection device, 5 ... Solenoid valve for main burner, 6 ... Solenoid valve for pilot burner, 7 ... Air volume switching adjustment , 8 ... blower, 9 ... ignition device, 10 ... combustion control device
Claims (1)
によって検出される蒸気温度、並びにボイラで発生させ
た蒸気圧力を検出し、下限圧力以下となると熱要求信号
を出力し、上限圧力以上となると熱要求停止信号を出力
する熱要求検出装置からの信号を燃焼制御装置に取り込
み、蒸気圧力が下限圧力以下となって熱要求信号が出力
されると、プリパージ実施後にメーンバーナを着火させ
ているガス焚きボイラの燃焼制御装置において、熱要求
停止信号にて燃焼を停止してからの蒸気温度変化と経過
時間を計測することで温度変化率を検出し、 温度変化率が設定値以下の場合には、熱要求信号発信後
にプリパージを開始して、燃焼準備に要する時間経過後
メーンバーナを着火させ、 温度変化率が設定値よりも大きかった場合には、熱要求
信号が発信される前にプリパージを開始することで、メ
ーンバーナの着火を早められるようにすることを特徴と
するガス焚きボイラの燃焼制御装置。1. A steam temperature detected by a temperature sensor provided in a steam portion in a boiler and a steam pressure generated by the boiler are detected. When the steam pressure falls below a lower limit pressure, a heat request signal is output. When the heat request stop signal is output, the signal from the heat request detection device that outputs a heat request stop signal is taken into the combustion control device. In the combustion control device of the boiler, the temperature change rate is detected by measuring the steam temperature change and the elapsed time after stopping the combustion by the heat request stop signal, and when the temperature change rate is less than the set value, The prepurge starts after the heat request signal is transmitted, and the main burner is ignited after the time required for combustion preparation has elapsed. If the temperature change rate is greater than the set value, the heat request No. By starting the prepurge before is transmitted, a combustion control device for a gas-fired boiler, characterized in that to be early ignition of Menbana.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990107058U JP2552995Y2 (en) | 1990-10-15 | 1990-10-15 | Gas fired boiler combustion control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990107058U JP2552995Y2 (en) | 1990-10-15 | 1990-10-15 | Gas fired boiler combustion control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0463932U JPH0463932U (en) | 1992-06-01 |
JP2552995Y2 true JP2552995Y2 (en) | 1997-11-05 |
Family
ID=31853388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1990107058U Expired - Fee Related JP2552995Y2 (en) | 1990-10-15 | 1990-10-15 | Gas fired boiler combustion control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2552995Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4031114B2 (en) * | 1998-07-21 | 2008-01-09 | 株式会社サムソン | Boiler combustion control system |
JP5935431B2 (en) * | 2012-03-21 | 2016-06-15 | 三浦工業株式会社 | boiler |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07827Y2 (en) * | 1987-12-28 | 1995-01-11 | 日立化成工業株式会社 | Reheating device |
JPH087239Y2 (en) * | 1988-04-01 | 1996-03-04 | 三浦工業株式会社 | Boiler combustion control device |
-
1990
- 1990-10-15 JP JP1990107058U patent/JP2552995Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0463932U (en) | 1992-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0154818B1 (en) | Control system for induced draft combustion | |
JP3531901B2 (en) | Steam pressure stability control system for boiler including steam consuming equipment | |
AU648163B2 (en) | Thermoelectric sensor | |
US5220864A (en) | Noodle cooker | |
JP2552995Y2 (en) | Gas fired boiler combustion control device | |
JP2657985B2 (en) | Combustion control method for gas-fired small boiler | |
JP2517883Y2 (en) | Boiler combustion control device | |
KR20020047842A (en) | Apparatus and method for controlling preheat of biler | |
JPS5671714A (en) | Combustion controlling apparatus | |
JP2558797B2 (en) | Water heater controller | |
JPH0318836Y2 (en) | ||
JPH0428972B2 (en) | ||
JP3822735B2 (en) | Water heater, combustion device, and method for displaying combustion state of water heater | |
JP2665136B2 (en) | Incomplete combustion detector for combustion equipment | |
JP2675516B2 (en) | Combustion equipment | |
JP2004044953A (en) | Boiler selectively performing pilot combustion | |
JP2641045B2 (en) | Start control device for gas combustion equipment | |
JPS6319842Y2 (en) | ||
JP2735465B2 (en) | Incomplete combustion detector for combustion equipment | |
JPH04113158A (en) | Heating value control of hot water supply heater | |
JPH0144923Y2 (en) | ||
JPH10169977A (en) | Incomplete combustion prevention apparatus for gas hot water heater | |
JPH01314849A (en) | Hot water supplying apparatus | |
JPH0566057A (en) | Controller for hot water supplying apparatus | |
JPS584034Y2 (en) | Kerosene instant water heater |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |