JP3053980B2 - Boiler combustion control device - Google Patents
Boiler combustion control deviceInfo
- Publication number
- JP3053980B2 JP3053980B2 JP4316334A JP31633492A JP3053980B2 JP 3053980 B2 JP3053980 B2 JP 3053980B2 JP 4316334 A JP4316334 A JP 4316334A JP 31633492 A JP31633492 A JP 31633492A JP 3053980 B2 JP3053980 B2 JP 3053980B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel gas
- combustion
- pressure
- valve
- solenoid valve
- 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
- Regulation And Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、供給されるガス圧力が
２００ｍｍＡｑ程度の低圧ガス焚仕様の多管式貫流ボイ
ラに主として用いられるボイラ燃焼量制御装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler combustion amount control device mainly used in a low-pressure gas-fired multi-tube once-through boiler in which the supplied gas pressure is about 200 mmAq.
【０００２】[0002]
【従来の技術】低圧ガス焚仕様の多管式貫流ボイラにお
いては、従来から、燃焼量を高燃焼（１００％燃焼）、
低燃焼（５０％燃焼）、停止（０％燃焼）の三段階に制
御するいわゆる三位置制御が採用されている。2. Description of the Related Art In a multi-tube once-through boiler of a low-pressure gas-fired type, a high combustion amount (100% combustion),
A so-called three-position control for controlling in three stages of low combustion (50% combustion) and stop (0% combustion) is employed.
【０００３】斯かる三位置制御を行う多管式貫流ボイラ
の例としては、例えば図３に示すものがある。FIG. 3 shows an example of a multi-tube once-through boiler that performs such three-position control.
【０００４】図３中、１はボイラ本体であって、該ボイ
ラ本体１は円周方向へ所要の間隔で立設された竪向きで
且つ複数の加熱管２と、該加熱管２で包囲された内部空
間に形成された燃焼室３と、加熱管２の下部に接続され
た環状の下部管寄せ４と、加熱管２の上部に接続された
環状の上部管寄せ５を備え、ボイラ本体１の上部管寄せ
５に包囲された空間部には、燃料ガスを燃焼室３内に噴
射し得るようにしたバーナノズル６が竪向きに取付けら
れている。In FIG. 3, reference numeral 1 denotes a boiler main body, and the boiler main body 1 is surrounded by a plurality of heating pipes 2, which are vertically arranged at required intervals in a circumferential direction, and a plurality of heating pipes 2. A combustion chamber 3 formed in the inner space formed by the heater, an annular lower header 4 connected to a lower portion of the heating tube 2, and an annular upper header 5 connected to an upper portion of the heating tube 2. In a space surrounded by the upper header 5, a burner nozzle 6 capable of injecting fuel gas into the combustion chamber 3 is vertically mounted.
【０００５】７はボイラ本体１の下部管寄せ４に接続さ
れた給水管であって、該給水管７には、下部管寄せ４に
水を供給し得るようにした給水ポンプ８及び下部管寄せ
４から給水ポンプ８へ水が逆流しないようにした逆止弁
９を備えている。[0005] Reference numeral 7 denotes a water supply pipe connected to the lower header 4 of the boiler main body 1. The water supply pipe 7 has a water supply pump 8 and a lower header which can supply water to the lower header 4. A check valve 9 is provided to prevent water from flowing back from 4 to the water supply pump 8.
【０００６】１０は気水分離器であって、該気水分離器
１０の上側部と上部管寄せ５の上面とは蒸気管１１によ
り接続され、気水分離器１０の底部と下部管寄せ４の側
部とは降水管１２により接続されている。Reference numeral 10 denotes a steam separator. The upper portion of the steam separator 10 and the upper surface of the upper header 5 are connected by a steam pipe 11, and the bottom portion of the steam separator 10 and the lower header 4 are connected. Are connected by a downcomer 12.
【０００７】１３は先端がバーナノズル６に接続された
燃料ガス管であって、該燃料ガス管１３の後端には互い
に並列配置された燃料ガス管１４，１５の先端が接続さ
れ、燃料ガス管１４，１５の後端には燃料ガス管１６が
接続されている。又燃料ガス管１４には低燃焼電磁弁１
７が、燃料ガス管１５には高燃焼電磁弁１８が、夫々接
続され、燃料ガス管１６には、燃料ガス流れ方向Ｄに対
し上流側から下流側へ向けてストレーナ１９及びガバナ
付き遮断弁２０が接続されている。Reference numeral 13 denotes a fuel gas pipe whose tip is connected to the burner nozzle 6. To the rear end of the fuel gas pipe 13, tips of fuel gas pipes 14, 15 arranged in parallel with each other are connected. Fuel gas pipes 16 are connected to the rear ends of the fuel cells 14 and 15, respectively. The fuel gas pipe 14 has a low combustion solenoid valve 1.
7, a high combustion solenoid valve 18 is connected to the fuel gas pipe 15, and a strainer 19 and a governor shutoff valve 20 are connected to the fuel gas pipe 16 from upstream to downstream in the fuel gas flow direction D. Is connected.
【０００８】２１，２２は蒸気管１１に接続された圧力
スイッチであって、蒸気管１１を流れる蒸気の圧力ＰE
が予め設定された下限の圧力ＰE1よりも低い場合（ＰE
＜ＰE1）には、圧力スイッチ２１から燃焼制御装置２３
へ作動指令Ｖ1を与え得るようになっており、蒸気管１
１を流れる圧力ＰEが予め設定された上限の圧力ＰE2よ
りも低く下限の圧力ＰE1よりも高い場合（ＰE1＜ＰE＜
ＰE2）には、圧力スイッチ２２から燃焼制御装置２３へ
作動指令Ｖ2を与え得るようになっている。[0008] Reference numerals 21 and 22 denote pressure switches connected to the steam pipe 11, and the pressure P E of the steam flowing through the steam pipe 11.
Is lower than a preset lower limit pressure P E1 (P E
<P E1 ) includes the pressure switch 21 and the combustion control device 23
It is adapted to be given operation command V 1 to a steam pipe 1
If the pressure P E that flows through a 1 is higher than the lower limit of the pressure P E1 lower than the pressure P E2 of the upper limit set in advance (P E1 <P E <
At P E2 ), an operation command V 2 can be given from the pressure switch 22 to the combustion control device 23.
【０００９】燃焼制御装置２３からは、弁開指令Ｖ3，
Ｖ4を両電磁弁１７，１８ へ与え得るようになっている
と共にガバナ付き遮断弁２０に弁開指令Ｖ5を与え得る
ようになっている。From the combustion control device 23, a valve opening command V 3 ,
V 4 can be supplied to both the solenoid valves 17 and 18, and a valve open command V 5 can be supplied to the governor shutoff valve 20.
【００１０】上記多管式貫流ボイラでは、給水ポンプ８
から給水管７、下部管寄せ４を介して加熱管２へ送給さ
れた水は、燃焼室３内で生成された燃焼ガスの熱により
加熱され、蒸気として上部管寄せ５、蒸気管１１を通り
気水分離器１０へ導入され、気水分離器１０で水分を除
去されて消費側へ送給され、気水分離器１０で分離され
た水は降水管１２から下部管寄せ４へ戻される。In the multi-tube once-through boiler, the feed pump 8
Is supplied to the heating pipe 2 through the water supply pipe 7 and the lower header 4 by the heat of the combustion gas generated in the combustion chamber 3, and is supplied to the upper header 5 and the steam pipe 11 as steam. The water is introduced into the steam separator 10, the moisture is removed by the steam separator 10, the water is sent to the consumer side, and the water separated by the steam separator 10 is returned from the downcomer 12 to the lower header 4. .
【００１１】又上記多管式貫流ボイラでは、加熱管２で
蒸発して蒸気管１１を流れる蒸気の圧力ＰEが予め設定
された下限の圧力ＰE1よりも低下すると（ＰE＜ＰE1＜
ＰE2）、圧力スイッチ２１から燃焼制御装置２３へ作動
指令Ｖ1が与えられ（圧力スイッチ２２からの作動指令
Ｖ2は与えられない）、燃焼制御装置２３からの弁開指
令Ｖ5，Ｖ3，Ｖ4によりガバナ付き遮断弁２０、低燃焼
電磁弁１７、高燃焼電磁弁１８は開になる。このため、
燃料ガス管１６の上流側から送られて来た燃料ガスは、
燃料ガス管１６及びその中途部に設けられたストレーナ
１９及びガバナ付き遮断弁２０を通って燃料ガス管１
４，１５に流入し、燃料ガス管１４では低燃焼電磁弁１
７を通って燃料ガス管１３に流入し、燃料ガス管１５で
は高燃焼電磁弁１８を通って燃料ガス管１３に流入し、
燃料ガス管１３に流入した燃料ガスはバーナノズル６か
ら燃焼室３内へ噴射され、燃焼する（１００％燃焼）。[0011] In the above-tube once-through boiler, the pressure P E of the steam flowing through the steam pipe 11 is evaporated in the heating tube 2 is lower than the pressure P E1 in the lower limit set in advance (P E <P E1 <
P E2 ), the operation command V 1 is given from the pressure switch 21 to the combustion control device 23 (the operation command V 2 from the pressure switch 22 is not given), and the valve opening commands V 5 , V 3 from the combustion control device 23 are provided. , governor with shut-off valve 20 by V 4, low combustion solenoid valve 17, high burn solenoid valve 18 will be opened. For this reason,
The fuel gas sent from the upstream side of the fuel gas pipe 16 is
The fuel gas pipe 1 passes through the fuel gas pipe 16 and a strainer 19 and a governor shutoff valve 20 provided in the middle thereof.
4 and 15, and the low-combustion solenoid valve 1
7, the fuel gas flows into the fuel gas pipe 13, the fuel gas pipe 15 flows into the fuel gas pipe 13 through the high combustion solenoid valve 18, and
The fuel gas flowing into the fuel gas pipe 13 is injected from the burner nozzle 6 into the combustion chamber 3 and burns (100% combustion).
【００１２】蒸気管１１を流れる蒸気の圧力ＰEが予め
設定された下限の圧力ＰE1よりも高く上限の圧力ＰE2よ
りも低くなった場合（ＰE1＜ＰE＜ＰE2）には、圧力ス
イッチ２２から燃焼制御装置２３へ作動指令Ｖ2が与え
られ（圧力スイッチ２１からの作動指令Ｖ1は与えられ
ない）、燃焼制御装置２３からの弁開指令Ｖ5，Ｖ3によ
りガバナ付き遮断弁２０、低燃焼電磁弁１７は開になる
が、高燃焼電磁弁１８には弁開指令Ｖ4は与えられず、
高燃焼電磁弁１８は閉止する。このため、燃料ガス管１
６を送られて来た燃料ガスは、その中途部に設けられた
ストレーナ１９、ガバナ付き遮断弁２０を通って燃料ガ
ス管１４へ流入し、燃料ガス管１４では低燃焼電磁弁１
７を通り燃料ガス管１３へ流入し、燃料ガス管１３を通
ったうえバーナノズル６から燃焼室３内へ噴射され、燃
焼する（５０％燃焼）。[0012] When the pressure P E of the steam flowing through the steam pipe 11 is lower than the high upper limit pressure P E2 than the lower limit of the pressure P E1 which is set in advance (P E1 <P E <P E2) is combustion control system 23 operation command V 2 is applied to the pressure switch 22 (operation command V 1 of the the pressure switch 21 is not given), blocked with the governor by a valve opening command V 5, V 3 from the combustion control device 23 valve 20, but low combustion solenoid valve 17 is opened, the valve opening command V 4 is not given to the high combustion solenoid valve 18,
The high combustion solenoid valve 18 is closed. Therefore, the fuel gas pipe 1
6 flows into the fuel gas pipe 14 through a strainer 19 and a governor shutoff valve 20 provided in the middle of the fuel gas, and the fuel gas pipe 14 receives the low combustion electromagnetic valve 1.
7, the fuel gas flows into the fuel gas pipe 13, passes through the fuel gas pipe 13, is injected into the combustion chamber 3 from the burner nozzle 6, and burns (50% combustion).
【００１３】蒸気管１１を流れる蒸気の圧力ＰEが予め
設定された上限の圧力ＰE2よりも高くなった場合（ＰE1
＜ＰE2＜ＰE）には、圧力スイッチ２１，２２から燃焼
制御装置２３へ作動指令Ｖ1，Ｖ2は与えられず、燃焼制
御装置２３からガバナ付き遮断弁２０、低燃焼電磁弁１
７、高燃焼電磁弁１８へは弁開指令Ｖ5，Ｖ3，Ｖ4には
与えられないため、ガバナ付き遮断弁２０、低燃焼電磁
弁１７、高燃焼電磁弁１８は何れも閉止する。このた
め、燃料ガス管１６の燃料ガスは燃料ガス管１３へは送
給されず、燃焼は停止している（０％燃焼）。[0013] If the pressure P E of the steam flowing through the steam pipe 11 is higher than the pressure P E2 of the upper limit set in advance (P E1
In <P E2 <P E ), the operation commands V 1 and V 2 are not given from the pressure switches 21 and 22 to the combustion control device 23, and the shut-off valve 20 with governor and the low combustion electromagnetic valve 1 are sent from the combustion control device 23.
7, the to high fire the solenoid valve 18 for valve opening command V 5, V 3, V 4 is not given to the governor with shut-off valve 20, the low combustion solenoid valve 17, high burn solenoid valve 18 both to close. Therefore, the fuel gas in the fuel gas pipe 16 is not supplied to the fuel gas pipe 13, and the combustion is stopped (0% combustion).
【００１４】[0014]
【発明が解決しようとする課題】上述の多管式貫流ボイ
ラでは、燃料ガス管１６上流側のガス供給側の問題によ
り、燃料ガス管１６を送給されるガスの圧力が１００ｍ
ｍＡｑ程度まで低下することがあるが、低燃焼電磁弁１
７及び高燃焼電磁弁１８が開いた１００％燃焼の際にガ
ス圧力が１００ｍｍＡｑ程度まで低下すると、燃料ガス
管１３内の燃焼室３内の差圧が低下し、バーナノズル６
から噴射される燃料ガスの勢いが弱くなり、極端な場合
には、燃焼室３からバーナノズル６側への逆流が生じる
ため、バーナノズル６の燃焼状態が不安定になる虞れが
ある。In the above-mentioned multi-tube once-through boiler, the pressure of the gas supplied through the fuel gas pipe 16 is 100 m due to a problem on the gas supply side upstream of the fuel gas pipe 16.
Although it may be reduced to about mAq, the low combustion solenoid valve 1
When the gas pressure decreases to about 100 mmAq during 100% combustion with the 7 and high combustion solenoid valve 18 opened, the differential pressure in the combustion chamber 3 in the fuel gas pipe 13 decreases and the burner nozzle 6
In the extreme case, the backflow from the combustion chamber 3 to the burner nozzle 6 side occurs, and the combustion state of the burner nozzle 6 may become unstable.
【００１５】本発明は、上述の実情に鑑み、ガス供給側
の問題により燃料ガスの圧力ＰGが低下した場合にも、
バーナノズル６が安定した燃焼を行い得るようにするこ
とを目的としてなしたものである。[0015] The present invention has been made in view of the circumstances described above, even when the pressure P G of the fuel gas is lowered by the gas supply side problem,
The purpose is to enable the burner nozzle 6 to perform stable combustion.
【００１６】[0016]
【課題を解決するための手段】本発明は、ボイラ本体１
内の燃焼室３へ燃料ガスを噴射し得るようにしたバーナ
ノズル６へ燃料ガスを送給する燃料ガス管１４に接続さ
れた低燃焼電磁弁１７と、前記バーナノズル６へ燃料ガ
スを送給するよう前記燃料ガス管１４に対して並列接続
された燃料ガス管１５に接続された高燃焼電磁弁１８
と、燃料ガス管１４，１５へ燃料ガスを送給する燃料ガ
ス管１６に接続された遮断弁２０と、該遮断弁２０及び
前記低燃焼電磁弁１７並に高燃焼電磁弁１８が開いた高
燃焼状態で前記燃料ガス管１６内の燃料ガスの圧力ＰG
が基準の圧力ＰG0よりも低下した場合に作動指令Ｖ7を
出力するよう燃料ガス管１６に接続された圧力スイッチ
２５と、燃料ガス管１６内の燃料ガスの圧力ＰGが前記
圧力ＰG0よりも高い圧力ＰG2を越えたら作動指令Ｖ8を
出力するよう燃料ガス管１６に接続された圧力スイッチ
２６と、圧力スイッチ２５からの作動指令Ｖ7が与えら
れたら遮断弁２０及び低燃焼電磁弁１７へ弁開指令
Ｖ5，Ｖ3を与え、圧力スイッチ２６からの作動指令Ｖ8
が与えられたら遮断弁２０及び低燃焼電磁弁１７並に高
燃焼電磁弁１８へ弁開指令Ｖ5，Ｖ3，Ｖ4を与える燃焼
制御装置２３を備えてなるものである。SUMMARY OF THE INVENTION The present invention relates to a boiler main body 1.
A low combustion solenoid valve 17 connected to a fuel gas pipe 14 for supplying fuel gas to a burner nozzle 6 capable of injecting fuel gas into a combustion chamber 3 therein, and supplying fuel gas to the burner nozzle 6. High combustion solenoid valve 18 connected to fuel gas pipe 15 connected in parallel to fuel gas pipe 14
A shutoff valve 20 connected to the fuel gas pipe 16 for supplying fuel gas to the fuel gas pipes 14 and 15; and a high valve having the shutoff valve 20 and the low combustion solenoid valve 17 and the high combustion solenoid valve 18 opened. The pressure P G of the fuel gas in the fuel gas pipe 16 in the combustion state
There the pressure switch 25 connected to the fuel gas pipe 16 so that than the pressure P G0 of the reference outputs an operation command V 7 when lowered, the pressure P G of the fuel gas in the fuel gas pipe 16 the pressure P G0 high pressure switch 26 connected to the fuel gas pipe 16 so as to output the operation command V 8 Once beyond the pressure P G2, operation command V 7 is given When the shutoff valve 20 and the low combustion electromagnetic from the pressure switch 25 than The valve opening commands V 5 and V 3 are given to the valve 17, and the operation command V 8 from the pressure switch 26 is given.
Is provided, a combustion control device 23 for giving valve opening commands V 5 , V 3 , V 4 to the shut-off valve 20 and the low combustion solenoid valve 17 as well as the high combustion solenoid valve 18.
【００１７】[0017]
【作用】遮断弁２０及び低燃焼電磁弁１７並に高燃焼電
磁弁１８が開き、バーナノズル６が高燃焼状態である場
合に、燃料ガス管１６内の燃料ガスの圧力ＰGが基準と
なる圧力ＰG0よりも低下すると、圧力スイッチ２５から
作動指令Ｖ7が燃焼制御装置２３へ与えられ、燃焼制御
装置２３からの弁開指令Ｖ3により低燃焼電磁弁１７は
開くが、燃焼制御装置２３からは弁開指令Ｖ4が出力さ
れなくなるため高燃焼電磁弁１８は閉止する。このた
め、バーナノズル６は低燃焼状態となり、ガスの圧力Ｐ
Gが低い場合にもバーナノズル６での燃焼の安定性が保
持される。[Action] high burn solenoid valve 18 is opened to the parallel shut-off valve 20 and the low combustion solenoid valve 17, when the burner nozzle 6 is high combustion state, the pressure which the pressure P G of the fuel gas in the fuel gas pipe 16 becomes the reference When the pressure drops below P G0, an operation command V 7 is given from the pressure switch 25 to the combustion control device 23, and the low combustion solenoid valve 17 is opened by the valve opening command V 3 from the combustion control device 23. the high combustion solenoid valve 18 for valve opening command V 4 is not output to close. As a result, the burner nozzle 6 enters a low combustion state, and the gas pressure P
Even when G is low, the combustion stability in the burner nozzle 6 is maintained.
【００１８】燃料ガスの圧力ＰGが圧力ＰG0よりも高い
所定の圧力ＰG2になると、圧力スイッチ２６からの作動
指令Ｖ8が燃焼制御装置２３へ与えられ、燃焼制御装置
２３からは弁開指令Ｖ4が高燃焼電磁弁１８に与えら
れ、弁開指令Ｖ3は低燃焼電磁弁１７へ与えられなくな
るため、高燃焼電磁弁１８が開き、低燃焼電磁弁１７も
開いている。このため、バーナノズル６は高燃焼状態へ
戻る。[0018] When the pressure P G of the fuel gas becomes a predetermined pressure P G2 higher than the pressure P G0, operation command V 8 from the pressure switch 26 is provided to the combustion controller 23, from the combustion control device 23 valve opening command V 4 is applied to the high combustion solenoid valve 18, since the valve opening command V 3 not given to the low combustion solenoid valve 17 opens the high combustion solenoid valve 18 is also opened low fire solenoid valve 17. Therefore, the burner nozzle 6 returns to the high combustion state.
【００１９】[0019]
【実施例】以下、本発明の実施例を添付図面を参照しつ
つ説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００２０】図１は本発明の一実施例で、基本的な構成
は図３に示す従来の多管式貫流ボイラの場合と同様であ
るが、本実施例では、燃料ガス管１６のガバナ付き遮断
弁２０よりも上流側に圧力スイッチ２４，２５，２６が
接続されている。而して、圧力スイッチ２４は燃料ガス
管１６中の燃料ガスの圧力ＰGが予め設定した下限の圧
力ＰG1よりも低い場合（ＰG＜ＰG1）にボイラ全体を停
止させるための作動指令Ｖ6を燃焼制御装置２３へ与え
るものであり、圧力スイッチ２５は燃料ガス管１６中の
燃料ガスの圧力ＰGが前記下限の圧力ＰG1よりは高いが
予め設定した基準の圧力ＰG0よりも低い場合（ＰG1＜Ｐ
G＜ＰG0）に、強制的に低燃焼を行うための作動指令Ｖ7
を燃焼制御装置２３へ与えるものであり、圧力スイッチ
２６は燃料ガス管１６中の燃料ガスの圧力ＰGが予め設
定した上限の圧力ＰG2よりも更に高い場合（ＰG＞ＰG2
＞ＰG0＞ＰG1）に高燃焼へ自動復帰するための作動指令
Ｖ8を燃焼制御装置２３へ与えるものである。FIG. 1 shows an embodiment of the present invention. The basic structure is the same as that of the conventional multi-tube once-through boiler shown in FIG. 3, but in this embodiment, the fuel gas pipe 16 is provided with a governor. Pressure switches 24, 25, 26 are connected upstream of the shutoff valve 20. And Thus, the pressure switch 24 operation command for stopping the whole boiler is lower than the pressure P G1 of lower limit pressure P G of the fuel gas in the fuel gas pipe 16 is preset (P G <P G1) is intended to provide a V 6 to the combustion controller 23, pressure switch 25 is a pressure P G of the fuel gas in the fuel gas pipe 16 higher than the pressure P G1 of the lower than the pressure P G0 of the reference set in advance If low (P G1 <P
G <P G0 ), the operation command V 7 for forcibly performing low combustion
The and it is to be given to the combustion control device 23, when the pressure switch 26 is still higher than the pressure P G2 upper limit pressure P G of the fuel gas in the fuel gas pipe 16 is preset (P G> P G2
> It is one that confers a P G0> operation command V 8 for automatic return to the high combustion P G1) to the combustion control device 23.
【００２１】斯かる多管式貫流ボイラにおいては、蒸気
管１１内の蒸気の圧力ＰEが予め定めた下限の圧力ＰE1
よりも低く且つ燃料ガス管１６内の燃料ガスの圧力ＰG
が基準の圧力ＰG0よりも高い場合には、圧力スイッチ２
１からの作動指令Ｖ1を基として燃焼制御装置２３から
はガバナ付き遮断弁２０及び低燃焼電磁弁１７並に高燃
焼電磁弁１８へ弁開指令Ｖ5，Ｖ3，Ｖ4が与えられ、ガ
バナ付き遮断弁２０及び低燃焼電磁弁１７並に高燃焼電
磁弁１８が開いている。このため、燃料ガスは燃料ガス
管１６から燃料ガス管１４，１５へ分岐して流れ、燃料
ガス管１３で合流したうえバーナノズル６から燃焼室３
内へ噴射されることになり、従ってバーナノズル６は高
燃焼状態を継続している。[0021] In such a multi-tube once-through boiler, the lower limit of the pressure P E1 in which the pressure P E of the steam in the steam pipe 11 predetermined
Lower than the pressure P G of the fuel gas in the fuel gas pipe 16
Is higher than the reference pressure P G0 , the pressure switch 2
Based on the operation command V 1 from the combustion control device 1 , valve opening commands V 5 , V 3 , V 4 are given to the shutoff valve 20 with governor, the low combustion solenoid valve 17 and the high combustion solenoid valve 18 from the combustion control device 23. The governor shut-off valve 20 and the low-burning solenoid valve 17 and the high-burning solenoid valve 18 are open. For this reason, the fuel gas branches off from the fuel gas pipe 16 to the fuel gas pipes 14 and 15, flows together at the fuel gas pipe 13, and then flows from the burner nozzle 6 to the combustion chamber 3.
Therefore, the burner nozzle 6 continues to be in a high combustion state.
【００２２】斯かる高燃焼状態の際に、ガス供給側の問
題により燃料ガス管１６内の燃料ガスの圧力ＰGが基準
となる圧力ＰG0よりも低下すると、圧力スイッチ２５か
らの作動指令Ｖ7が燃焼制御装置２３へ与えられ、燃焼
制御装置２３からは継続して弁開指令Ｖ5，Ｖ3がガバナ
付き遮断弁２０及び低燃焼電磁弁１７へ与えられたま
ま、弁開指令Ｖ4は高燃焼電磁弁１８へ与えられなくな
る。このためガバナ付き遮断弁２０及び低燃焼電磁弁１
７は開いたままで高燃焼電磁弁１８は閉止することにな
る。従って、この場合には、燃料ガス管１６，１４，１
３を通った燃料ガスがバーナノズル６から燃焼室３内へ
噴射され、バーナノズル６は強制的に低燃焼状態とな
る。[0022] During such a high combustion state, the pressure P G of the fuel gas in the fuel gas pipe 16 through the gas supply side problem becomes lower than the pressure P G0 as a reference, operation command V from the pressure switch 25 7 is applied to the combustion control device 23, while the valve opening command V 5, V 3 continues from the combustion control device 23 provided to the governor with shut-off valve 20 and the low combustion solenoid valve 17, the valve opening command V 4 Is no longer provided to the high combustion solenoid valve 18. Therefore, the governor shutoff valve 20 and the low combustion solenoid valve 1
7 remains open and the high combustion solenoid valve 18 closes. Therefore, in this case, the fuel gas pipes 16, 14, 1
The fuel gas passing through 3 is injected into the combustion chamber 3 from the burner nozzle 6, and the burner nozzle 6 is forcibly brought into a low combustion state.
【００２３】ガス供給側の問題がなくなって燃料ガス管
１６内の燃料ガスの圧力ＰGが基準の圧力ＰG0よりも高
い予め定めた上限の圧力ＰG2よりも高くなると、圧力ス
イッチ２６から燃焼制御装置２３へ作動指令Ｖ8が与え
られ、燃焼制御装置２３からは弁開指令Ｖ5，Ｖ3が継続
してガバナ付き遮断弁２０及び低燃焼電磁弁１７に与え
られたまま、弁開指令Ｖ4が高燃焼電磁弁１８へ与えら
れる。このため、ガバナ付き遮断弁２０及び低燃焼電磁
弁１７は開いたままで高燃焼電磁弁１８が再び開く結
果、バーナノズル６は再び高燃焼状態に戻れることにな
る。[0023] gone gas supply problem becomes higher than the upper limit pressure P G2 of which defines higher advance than the pressure P G0 pressure P G of the fuel gas criteria in the fuel gas pipe 16, the combustion from the pressure switch 26 The operation command V 8 is given to the control device 23, and the valve opening commands V 5 and V 3 are continuously given from the combustion control device 23 to the shut-off valve 20 with governor and the low combustion solenoid valve 17 while the valve opening command is given. V 4 is provided to the high combustion solenoid valve 18. For this reason, the governor shutoff valve 20 and the low combustion solenoid valve 17 remain open, and the high combustion solenoid valve 18 opens again. As a result, the burner nozzle 6 can return to the high combustion state again.
【００２４】燃料ガス管１６中の燃料ガスの圧力ＰGが
予め定めた下限の圧力ＰG1よりも低下すると、圧力スイ
ッチ２４から作動指令Ｖ6が燃焼制御装置２３へ与えら
れ、燃焼制御装置２３からは弁開指令Ｖ5，Ｖ3，Ｖ4が
出力されなくなるため、ガバナ付き遮断弁２０、低燃焼
電磁弁１７、高燃焼電磁弁１８は何れも閉止し、バーナ
ノズル６の燃焼は中止すると共にボイラ全体が停止す
る。[0024] When the pressure P G of the fuel gas in the fuel gas pipe 16 is lower than the pressure P G1 of lower limits predetermined operation command V 6 is given to the combustion control device 23 from the pressure switch 24, a combustion control device 23 No longer outputs the valve opening commands V 5 , V 3 , and V 4, so that the shutoff valve 20 with governor, the low combustion solenoid valve 17, and the high combustion solenoid valve 18 are all closed, and the combustion of the burner nozzle 6 is stopped. The entire boiler stops.
【００２５】図２は、本発明のボイラ燃焼量制御装置に
おいて、燃料ガスの圧力により低燃焼電磁弁１７、高燃
焼電磁弁１８を開閉するためにシーケンス回路を用いる
例である。FIG. 2 shows an example in which a sequence circuit is used to open and close the low combustion electromagnetic valve 17 and the high combustion electromagnetic valve 18 by the pressure of the fuel gas in the boiler combustion amount control device of the present invention.
【００２６】図中、２７，２８は電源のプラス側或いは
マイナス側に接続されたケーブル、２９はケーブル２
７，２８間に接続されたケーブル、２６ａ，２５ａはケ
ーブル２９の中途部に電流流れ方向Ｄ0に対し、上流側
から下流側に向けて順次接続された圧力スイッチ２６，
２５の接点、３０はケーブル２９の接点２５ａ下流側に
接続されたリレー、３１は接点２６ａに対して並列で且
つ接点２５ａに対して直列となるように接続されしかも
リレー３０が励磁されたらオンになるようにした接点で
ある。In the figure, 27 and 28 are cables connected to the positive or negative side of the power supply, and 29 is a cable 2
A cable connected between the 7, 28, 26a, 25a whereas the current flow direction D 0 in the middle of the cable 29, pressure switch 26 which are sequentially connected from the upstream side toward the downstream side,
25 contacts, 30 are relays connected downstream of the contacts 25a of the cable 29, 31 are connected in parallel with the contacts 26a and in series with the contacts 25a, and are turned on when the relay 30 is excited. It is a contact that was made to become.
【００２７】ガス供給側に何等問題がなく、図１の燃料
ガス管１６内の燃料ガスの圧力ＰGが予め定めた上限の
圧力ＰG2よりも高い場合には、図２の圧力スイッチ２
６，２５の接点２６ａ，２５ａは何れもオンになってお
り、電流はケーブル２９を流れる。このため、リレー３
０が励磁されて接点３１もオンになっており、接点３１
がオンになることにより、図１の低燃焼電磁弁１７及び
高燃焼電磁弁１８が開となり、バーナノズル６は高燃焼
状態が維持される。[0027] without any problem on the gas supply side, is higher than the upper limit pressure P G2 of the pressure P G is a predetermined fuel gas in the fuel gas pipe 16 in FIG. 1, the pressure of the FIG. 2 switch 2
The contacts 26a and 25a of the switches 6 and 25 are all on, and the current flows through the cable 29. Therefore, relay 3
0 is excited and the contact 31 is also turned on.
Is turned on, the low combustion solenoid valve 17 and the high combustion solenoid valve 18 in FIG. 1 are opened, and the burner nozzle 6 is maintained in a high combustion state.
【００２８】燃料ガス管１６中の燃料ガスの圧力ＰGが
若干低下して予め定めた上限の圧力ＰG2よりは低いが基
準の圧力ＰG0よりも高い場合は圧力スイッチ２６の接点
２６ａはオフになる。しかし、接点３１及び圧力スイッ
チ２５の接点２５ａはオンになったままであるため、リ
レー３０には電流が流れ、接点３１はオンの状態を継続
するため、バーナノズル６の高燃焼状態は維持される。[0028] is higher than the pressure P G0 of lesser standards than the pressure P G2 upper limit pressure P G of the fuel gas in the fuel gas pipe 16 is predetermined decreased slightly contact 26a of the pressure switch 26 is off become. However, since the contact 31 and the contact 25a of the pressure switch 25 remain on, current flows through the relay 30, and the contact 31 continues to be on, so that the burner nozzle 6 maintains the high combustion state.
【００２９】燃料ガス管１６内の燃料ガスの圧力ＰGが
低下して基準の圧力ＰG0よりも下降すると、圧力スイッ
チ２５の接点２５ａがオフになり、リレー３０が非励磁
となるため、接点３１がオフになり、これにより図１の
高燃焼電磁弁１８が閉止し、低燃焼電磁弁１７が開いて
バーナノズル６は低燃焼状態となる。[0029] When the pressure P G of the fuel gas in the fuel gas pipe 16 is also lowered than the pressure P G0 of the reference reduced, because the contact 25a of the pressure switch 25 is turned off, the relay 30 is de-energized, the contacts 31 is turned off, whereby the high combustion electromagnetic valve 18 of FIG. 1 is closed, the low combustion electromagnetic valve 17 is opened, and the burner nozzle 6 is in a low combustion state.
【００３０】ガス供給側の問題が解決されて図１の燃料
ガス管１６内の燃料ガスの圧力ＰGが予め定めた上限の
圧力ＰG2よりも高くなると、圧力スイッチ２６，２５の
接点２６ａ，２５ａがオンになり、リレー３０が励磁さ
れて接点３１がオンになるため、低燃焼電磁弁１７及び
高燃焼電磁弁１８が開き、バーナノズル６は高燃焼状態
に復帰する。[0030] Gas supply problem is resolved pressure P G of the fuel gas in the fuel gas pipe 16 of Figure 1 is higher than the upper limit pressure P G2 of a predetermined, contact of the pressure switch 26 and 25 26a, 25a is turned on, the relay 30 is excited, and the contact 31 is turned on, so that the low combustion solenoid valve 17 and the high combustion solenoid valve 18 are opened, and the burner nozzle 6 returns to the high combustion state.
【００３１】なお、本発明に適用する燃焼量制御装置と
しては、シーケンス回路を設けても、或いはコンピュー
タを使用してソフト的に行うようにしても良い。又本発
明は上述の実施例に限定されるものではなく、本発明の
要旨を逸脱しない範囲内で種々変更を加え得ることは勿
論である。The combustion amount control device applied to the present invention may be provided with a sequence circuit, or may be implemented by software using a computer. Further, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.
【００３２】[0032]
【発明の効果】本発明のボイラ燃焼量制御装置によれ
ば、ガス供給側の問題で燃料ガスの圧力ＰGが予め定め
た基準となる圧力ＰG0よりも低下した場合には、バーナ
ノズル６の燃焼状態を高燃焼状態から強制的に低燃焼状
態へ切替えることができ、燃料ガスの圧力ＰGが低下し
た場合でもバーナノズル６は安定した燃焼を行うことが
できるという優れた効果を奏し得る。According to the boiler combustion amount control apparatus of the present invention, when lower than the pressure P G0 as a reference pressure P G of the fuel gas at the gas supply side problems determined in advance, the burner nozzle 6 can switch the combustion state from a high combustion state to forcibly low combustion state, the burner nozzle 6 even if the pressure P G of the fuel gas is lowered an excellent effect can perform stable combustion.
【図１】本発明のボイラ燃焼量制御装置の制御ブロック
図である。FIG. 1 is a control block diagram of a boiler combustion amount control device of the present invention.
【図２】本発明のボイラ燃焼量制御装置においてバーナ
ノズルを高燃焼状態から強制的に低燃焼状態へ切替える
際に用いるシーケンス回路図である。FIG. 2 is a sequence circuit diagram used for forcibly switching a burner nozzle from a high combustion state to a low combustion state in the boiler combustion amount control device of the present invention.
【図３】従来のボイラ燃焼量制御装置の制御ブロック図
である。FIG. 3 is a control block diagram of a conventional boiler combustion amount control device.
１ ボイラ本体 ６ バーナノズル １４，１５，１６ 燃料ガス管 １７ 低燃焼電磁弁 １８ 高燃焼電磁弁 ２０ ガバナ付き遮断弁（遮断弁） ２３ 燃焼制御装置 ２５，２６ 圧力スイッチ ＰG，ＰG0，ＰG1，ＰG2 圧力 Ｖ3，Ｖ4，Ｖ5 弁開指令 Ｖ7，Ｖ8 作動指令1 boiler body 6 burner nozzles 14, 15, 16 a fuel gas pipe 17 low fire solenoid valve 18 high burn solenoid valve 20 governor with shut-off valve (shutoff valve) 23 combustion control system 25 pressure switch P G, P G0, P G1 , P G2 pressure V 3, V 4, V 5 valve opening command V 7, V 8 operation command
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−148102（ＪＰ，Ａ) 特開 昭52−151943（ＪＰ，Ａ) 特開 昭51−79029（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F23N 1/00 103 F23N 5/18 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-148102 (JP, A) JP-A-52-151943 (JP, A) JP-A-51-79029 (JP, A) (58) Field (Int.Cl. 7 , DB name) F23N 1/00 103 F23N 5/18
Claims (1)
噴射し得るようにしたバーナノズル６へ燃料ガスを送給
する燃料ガス管１４に接続された低燃焼電磁弁１７と、
前記バーナノズル６へ燃料ガスを送給するよう前記燃料
ガス管１４に対して並列接続された燃料ガス管１５に接
続された高燃焼電磁弁１８と、燃料ガス管１４，１５へ
燃料ガスを送給する燃料ガス管１６に接続された遮断弁
２０と、該遮断弁２０及び前記低燃焼電磁弁１７並に高
燃焼電磁弁１８が開いた高燃焼状態で前記燃料ガス管１
６内の燃料ガスの圧力ＰGが基準の圧力ＰG0よりも低下
した場合に作動指令Ｖ7を出力するよう燃料ガス管１６
に接続された圧力スイッチ２５と、燃料ガス管１６内の
燃料ガスの圧力ＰGが前記圧力ＰG0よりも高い圧力ＰG2
を越えたら作動指令Ｖ8を出力するよう燃料ガス管１６
に接続された圧力スイッチ２６と、圧力スイッチ２５か
らの作動指令Ｖ7が与えられたら遮断弁２０及び低燃焼
電磁弁１７へ弁開指令Ｖ5，Ｖ3を与え、圧力スイッチ２
６からの作動指令Ｖ8が与えられたら遮断弁２０及び低
燃焼電磁弁１７並に高燃焼電磁弁１８へ弁開指令Ｖ5，
Ｖ3，Ｖ4を与える燃焼制御装置２３を備えてなることを
特徴とするボイラ燃焼量制御装置。A low combustion solenoid valve connected to a fuel gas pipe for supplying fuel gas to a burner nozzle capable of injecting fuel gas into a combustion chamber in a boiler body;
A high combustion solenoid valve 18 connected to a fuel gas pipe 15 connected in parallel to the fuel gas pipe 14 so as to feed the fuel gas to the burner nozzle 6, and fuel gas is supplied to the fuel gas pipes 14 and 15. A shut-off valve 20 connected to the fuel gas pipe 16 which is connected to the fuel gas pipe 16 in a high combustion state with the shut-off valve 20, the low combustion solenoid valve 17 and the high combustion solenoid valve 18 opened.
Fuel gas pipe 16 so that the pressure P G of the fuel gas in the 6 outputs the operation command V 7 when lower than the pressure P G0 of the reference
To the connected pressure switch 25, the fuel gas in the fuel gas pipe 16 the pressure P G is the pressure P G0 higher pressure P G2 than
Fuel gas pipe 16 so as to output the operation command V 8 Once beyond the
A pressure switch 26 connected, the valve opening command V 5, V 3 to the actuated command V 7 is given When the shutoff valve 20 and the low combustion solenoid valve 17 from the pressure switch 25 provided to the pressure switch 2
Valve opening command V 5 in parallel shut-off valve 20 and the low combustion solenoid valve 17 When operation command V 8 is given to the high combustion solenoid valve 18 from 6,
A boiler combustion amount control device comprising a combustion control device 23 for providing V 3 and V 4 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4316334A JP3053980B2 (en) | 1992-10-30 | 1992-10-30 | Boiler combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4316334A JP3053980B2 (en) | 1992-10-30 | 1992-10-30 | Boiler combustion control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06147466A JPH06147466A (en) | 1994-05-27 |
| JP3053980B2 true JP3053980B2 (en) | 2000-06-19 |
Family
ID=18075970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4316334A Expired - Fee Related JP3053980B2 (en) | 1992-10-30 | 1992-10-30 | Boiler combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3053980B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6992525B2 (en) * | 2018-01-12 | 2022-01-13 | 三浦工業株式会社 | boiler |
-
1992
- 1992-10-30 JP JP4316334A patent/JP3053980B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06147466A (en) | 1994-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2942080B2 (en) | Boiler combustion control device | |
| JP3053980B2 (en) | Boiler combustion control device | |
| JPS62162847A (en) | Gas instantaneous type hot water supplier | |
| JP3533799B2 (en) | Water heater | |
| JP2000038929A (en) | Fuel gas pressure reduction and heating equipment for gas turbine | |
| JP3242239B2 (en) | Fuel gas control method and device | |
| JP7508721B1 (en) | Boiler and hydrogen gas purging method | |
| JPH0968123A (en) | Fuel temperature raising device | |
| JP5521602B2 (en) | Fuel control device for by-product gas-fired combustion device | |
| JP3820642B2 (en) | Fuel pre-burner pressure control method and apparatus | |
| JP3131805B2 (en) | Fuel distribution control device for gas turbine combustor | |
| JP3598577B2 (en) | Return type nozzle burner device | |
| JPH026968B2 (en) | ||
| JP3066777B2 (en) | Fuel control device for gas turbine combustor | |
| JP3131804B2 (en) | Fuel distribution control device for gas turbine combustor | |
| JPH08178261A (en) | Boiler combustion system | |
| JP3973267B2 (en) | Oil water heater | |
| KR0143379B1 (en) | Purge media supply system for oil combustion burner | |
| JPH10318502A (en) | Combustion controlled boiler at three points | |
| JPH0345007Y2 (en) | ||
| JPH10306924A (en) | Gas turbine | |
| JPS584031Y2 (en) | gas flow regulator | |
| JPH08334220A (en) | Combustion equipment | |
| CN2300857Y (en) | Water heater with flow stabilizer | |
| JPS6396413A (en) | Combustion apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080407 Year of fee payment: 8 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080407 Year of fee payment: 8 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080407 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090407 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090407 Year of fee payment: 9 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090407 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090407 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100407 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100407 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110407 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |