JP2005172365A - Combustion device changing its burning capacity in stages - Google Patents

Combustion device changing its burning capacity in stages Download PDF

Info

Publication number
JP2005172365A
JP2005172365A JP2003414377A JP2003414377A JP2005172365A JP 2005172365 A JP2005172365 A JP 2005172365A JP 2003414377 A JP2003414377 A JP 2003414377A JP 2003414377 A JP2003414377 A JP 2003414377A JP 2005172365 A JP2005172365 A JP 2005172365A
Authority
JP
Japan
Prior art keywords
combustion
fuel
amount
low
fuel 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.)
Pending
Application number
JP2003414377A
Other languages
Japanese (ja)
Other versions
JP2005172365A5 (en
Inventor
Hirosuke Miyata
裕輔 宮田
Hiroshi Takashima
博史 高島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAMSON CO Ltd
Original Assignee
SAMSON CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SAMSON CO Ltd filed Critical SAMSON CO Ltd
Priority to JP2003414377A priority Critical patent/JP2005172365A/en
Publication of JP2005172365A publication Critical patent/JP2005172365A/en
Publication of JP2005172365A5 publication Critical patent/JP2005172365A5/ja
Pending legal-status Critical Current

Links

Images

Landscapes

  • Regulation And Control Of Combustion (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the instability of combustion in changing a burning capacity in a combustion device changing its burning capacity in stages. <P>SOLUTION: In an oil spray type combustion device comprising an air supply device 1, a fuel supply line for low combustion 10 and a fuel supply line for high combustion 11, and capable of adjusting the air supply for combustion and the fuel supply, parallel parts are formed on the way of the fuel supply line for high combustion, a fuel valve for high combustion 7 is mounted on one of the parallel parts, and a fuel valve for transferring 12 and a flow rate restricting means 13 are mounted on the other side. In a case when the burning capacity is changed from low combustion to high combustion, the change of the air supply is started first, then the fuel valve for transferring 12 is controlled to be opened, then the fuel valve for high combustion 7 is controlled to be opened, and further the change in the air supply is terminated lastly, and in a case when the burning capacity is changed from high combustion to low combustion, the change in the air supply is started first, then the fuel valve for high combustion 7 is controlled to be closed, then the fuel valve for transferring 12 is controlled to be closed, and the change in the air supply is terminated lastly. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、燃焼用空気供給量の変更を可能とした給気装置と、燃料供給量の変更を可能としたバーナを持ち、段階的な燃焼量変更を行う燃焼装置に関するものである。   The present invention relates to an air supply device capable of changing a combustion air supply amount and a combustion device having a burner capable of changing a fuel supply amount and performing a stepwise change in the combustion amount.

特許３０３１８５６号公報に記載があるように、燃焼用空気供給量の変更を可能とした給気装置と、燃料供給量の変更を可能としたバーナを持ち、燃焼量を高燃焼・低燃焼・停止の３位置で制御する燃焼装置がある。この場合、給気装置は電源の周波数を変更するインバータ装置によって回転速度の変更を可能とした送風機を使用しておき、燃焼量を変更する場合には送風機の周波数を検出し、周波数が所定の値になったときに燃料供給量を変更するようにしている。   As described in Japanese Patent No. 30318856, it has an air supply device that can change the supply amount of combustion air, and a burner that can change the fuel supply amount. There is a combustion device that controls at three positions. In this case, the air supply device uses a blower whose rotation speed can be changed by an inverter device that changes the frequency of the power supply. When changing the combustion amount, the frequency of the blower is detected and the frequency is set to a predetermined value. The fuel supply amount is changed when the value is reached.

油噴霧式燃焼装置の場合、燃料供給量を比例的に変更しようとすれば、大掛かりなシステムが必要となり、コストの上昇を招く。そのため、特許３０３１８５６号公報に記載しているように、燃料供給ラインには低燃焼用燃料弁と高燃焼用燃料弁を設けておき、低燃焼時には低燃焼用燃料弁のみを開くことで低燃焼用燃料供給量とし、高燃焼時には低燃焼用燃料弁と高燃焼用燃料弁の両方を開いて高燃焼用燃料供給量とすることで燃料供給量を調節している。   In the case of the oil spray combustion apparatus, if the fuel supply amount is to be changed proportionally, a large-scale system is required, resulting in an increase in cost. Therefore, as described in Japanese Patent No. 30318856, the fuel supply line is provided with a low combustion fuel valve and a high combustion fuel valve, and at low combustion, only the low combustion fuel valve is opened to reduce low combustion. The fuel supply amount is adjusted by opening both the low combustion fuel valve and the high combustion fuel valve at the time of high combustion so that the fuel supply amount is high.

燃料弁に電磁弁を使用している場合、燃料供給量の変更は電磁弁の開閉によって行うため、瞬間的に変更することができる。しかし、燃焼用空気供給量の変更は、送風機の回転速度変更やダンパ装置の開度変更などによって行うため、ある程度の時間が必要となる。そのため、燃焼量を変更する場合には、まず燃焼用空気供給量を変更する指令を出力し、燃焼用空気供給量を変更している途中で燃料供給量を変更する指令を出力する制御を行う。   When a solenoid valve is used as the fuel valve, the fuel supply amount is changed by opening and closing the solenoid valve, so that it can be changed instantaneously. However, since the change of the combustion air supply amount is performed by changing the rotational speed of the blower or changing the opening degree of the damper device, a certain amount of time is required. Therefore, when changing the combustion amount, first, a command for changing the combustion air supply amount is output, and a control for outputting a command for changing the fuel supply amount in the middle of changing the combustion air supply amount is performed. .

低燃焼から高燃焼へ燃焼量を増加する場合の空気比は、燃料供給量を変更せずに燃焼用空気供給量を増加している間は上昇し、高燃焼用燃料弁を開くことで燃料供給量を瞬間的に増加すると今度は空気比が低くなり、その後空気比は上昇して通常の燃焼状態となる。逆に、高燃焼から低燃焼へ燃焼量を減少する場合の空気比は、燃料供給量を変更せずに燃焼用空気供給量を減少している間は低下し、高燃焼用燃料弁を閉じることで燃料供給量を瞬間的に減少すると今度は空気比が高くなり、その後空気比は低下して通常の燃焼状態となる。この場合、空気比の変化が大きいと、燃焼の安定性が失われることになり、振動燃焼や燃焼衝撃が発生することがあった。
特許３０３１８５６号公報 When increasing the combustion amount from low combustion to high combustion, the air ratio increases while increasing the combustion air supply amount without changing the fuel supply amount, and the fuel is increased by opening the high combustion fuel valve. When the supply amount is increased instantaneously, the air ratio is lowered this time, and then the air ratio is increased to a normal combustion state. Conversely, the air ratio when the combustion amount is reduced from high combustion to low combustion decreases while the combustion air supply amount is decreasing without changing the fuel supply amount, and the high combustion fuel valve is closed. Thus, if the fuel supply amount is instantaneously reduced, the air ratio becomes higher, and then the air ratio is lowered to a normal combustion state. In this case, if the change in the air ratio is large, the stability of combustion is lost, and vibration combustion and combustion impact may occur.
Japanese Patent No. 30318856

本発明が解決しようとする課題は、燃焼量の段階的な変更を行っている燃焼装置において、燃焼量を変更する際に燃焼の安定性が失われることを防止することにある。   The problem to be solved by the present invention is to prevent the stability of combustion from being lost when the combustion amount is changed in a combustion apparatus in which the combustion amount is changed stepwise.

請求項１に記載の発明は、バーナへ燃焼用空気を供給する給気装置と、バーナへ燃料油を供給する低燃焼用燃料供給ライン及び高燃焼用燃料供給ラインを持ち、燃焼用空気供給量と燃料供給量を調節することにより、低燃焼と高燃焼で燃焼量の変更を可能としている油噴霧式燃焼装置において、高燃焼用燃料供給ラインの途中に並列部を設け、並列部の一方に高燃焼用燃料弁、並列部の他方側には移行時用燃料弁と流量制限手段を設けておき、燃焼量を低燃焼から高燃焼へ変更する場合には、まず空気供給量の変更を開始し、次に移行時用燃料弁を開くことで移行時用燃料供給量とし、その後に高燃焼用燃料弁を開く制御を行い、燃焼量を高燃焼から低燃焼へ変更する場合には、まず空気供給量の変更を開始し、次に高燃焼用燃料弁を閉じることで移行時用燃料供給量とし、その後に移行時用燃料弁を閉じる制御を行うことを特徴とする段階的な燃焼量変更を行う燃焼装置である。   The invention according to claim 1 has an air supply device for supplying combustion air to the burner, a low combustion fuel supply line for supplying fuel oil to the burner, and a high combustion fuel supply line, and a combustion air supply amount In the oil spray type combustion device that enables the combustion amount to be changed between low combustion and high combustion by adjusting the fuel supply amount, a parallel portion is provided in the middle of the high combustion fuel supply line, and one of the parallel portions is provided. A fuel valve for transition and a flow rate restricting means are provided on the other side of the high combustion fuel valve and the parallel part, and when changing the combustion amount from low combustion to high combustion, start changing the air supply amount first Next, when the fuel supply amount for transition is set by opening the fuel valve for transition and then the fuel valve for high combustion is opened and the combustion amount is changed from high combustion to low combustion, Start changing the air supply, then close the fuel valve for high combustion And Migration fuel supply amount and a combustion device that performs stepwise combustion amount changes and performs thereafter close the transitional fuel valve control.

請求項２に記載の発明は、前記の段階的な燃焼量変更を行う燃焼装置において、給気装置は電源の周波数を変更することで回転速度の変更を可能とした送風機であり、燃焼量を変更する場合には送風機の周波数を検出しておき、周波数の値が所定の値となると移行時用燃料供給量とし、周波数が所定の値となった時から所定の時間遅延後に移行後の燃料供給量とする制御を行うことを特徴とする段階的な燃焼量変更を行う燃焼装置である。   The invention according to claim 2 is the above-mentioned combustion apparatus that changes the combustion amount stepwise, wherein the air supply device is a blower that can change the rotation speed by changing the frequency of the power source, When changing, the frequency of the blower is detected, and when the frequency value reaches a predetermined value, the fuel supply amount for transition is used, and the fuel after transition after a predetermined time delay from when the frequency reaches the predetermined value It is a combustion apparatus for performing a stepwise change in the combustion amount, characterized in that the control is performed with a supply amount.

本発明を実施することによって、簡易なシステムでありながら燃焼量を変更する際に燃焼の安定性が失われることを防止でき、振動燃焼や燃焼衝撃が発生することのない安定した燃焼を得ることができるという利点がある。   By implementing the present invention, it is possible to prevent the loss of combustion stability when changing the amount of combustion while being a simple system, and to obtain stable combustion without generating vibration combustion or combustion impact There is an advantage that can be.

図１は本発明を実施しているボイラの燃料供給フローを示したものであり、図２は燃料弁の制御状況を示している。ボイラは上部に燃焼装置を設けており、下向きに火炎を発生するものである。燃焼装置は、バーナ２へ燃料油を供給する燃料供給ラインと、バーナ２へ燃焼用空気を供給する送風機１を設けている。送風機１には回転数変更装置３を接続しており、回転数変更装置３は送風機１へ供給する電源周波数を変更することで送風機の回転数変更を可能としている。回転数変更装置３には、高燃焼用周波数と低燃焼用周波数を設定しておき、燃焼用空気供給量を少なくする低燃焼時には、低燃焼用周波数とすることで電力消費量を削減することができる。   FIG. 1 shows a fuel supply flow of a boiler implementing the present invention, and FIG. 2 shows a control state of a fuel valve. The boiler is provided with a combustion device at the top, and generates a flame downward. The combustion apparatus includes a fuel supply line that supplies fuel oil to the burner 2 and a blower 1 that supplies combustion air to the burner 2. The rotation speed changing device 3 is connected to the blower 1, and the rotation speed changing device 3 can change the rotation speed of the blower by changing the power supply frequency supplied to the blower 1. In the rotation speed changing device 3, a high combustion frequency and a low combustion frequency are set, and at the time of low combustion in which the amount of combustion air supplied is reduced, the power consumption is reduced by using the low combustion frequency. Can do.

バーナ２には、低燃焼用ノズル４と高燃焼用ノズル５を設けておき、低燃焼用ノズル４には低燃焼用燃料供給ライン１０を接続し、高燃焼用ノズル５には高燃焼用燃料供給ライン１１を接続する。低燃焼用燃料供給ライン１０と高燃焼用燃料供給ライン１１は、共通の燃料供給ラインから分岐したものであり、共通部にオイルポンプ９を設けておく。   The burner 2 is provided with a low combustion nozzle 4 and a high combustion nozzle 5, a low combustion fuel supply line 10 is connected to the low combustion nozzle 4, and a high combustion fuel is connected to the high combustion nozzle 5. Connect the supply line 11. The low combustion fuel supply line 10 and the high combustion fuel supply line 11 are branched from a common fuel supply line, and an oil pump 9 is provided in a common portion.

燃焼装置は、低燃焼用ノズル４からのみ燃料を噴射して燃焼を行う低燃焼と、低燃焼用ノズル４及び高燃焼用ノズル５の両方から燃料を噴射して燃焼を行う高燃焼とで燃焼量を切り換えることができる油噴霧式燃焼装置としている。低燃焼用燃料供給ライン１０の途中には、低燃焼用ノズル４への燃料供給を制御する低燃焼用燃料弁６を設けており、高燃焼用燃料供給ライン１１の途中にも、高燃焼用ノズル５への燃料供給を制御する高燃焼用燃料弁７を設けている。高燃焼用燃料供給ライン１１は途中に流路を分岐させた並列部を設けておき、高燃焼用燃料弁７は並列部の一方に設置する。並列部の他方側には流量制限手段であるオリフィス１３と移行時用燃料弁１２を設けておく。回転数変更装置３、低燃焼用燃料弁６、高燃焼用燃料弁７、移行時用燃料弁１２、オイルポンプ９は、それぞれ制御装置８と接続しておき、制御装置８で各機器の作動を制御する。   The combustion apparatus burns with low combustion in which fuel is injected only from the low combustion nozzle 4 and combustion, and high combustion in which fuel is injected from both the low combustion nozzle 4 and the high combustion nozzle 5 to perform combustion. The oil spray type combustion device can switch the amount. A low combustion fuel valve 6 for controlling the fuel supply to the low combustion nozzle 4 is provided in the middle of the low combustion fuel supply line 10, and the high combustion fuel supply line 11 is also provided in the middle of the high combustion fuel supply line 11. A high combustion fuel valve 7 for controlling the fuel supply to the nozzle 5 is provided. The high combustion fuel supply line 11 is provided with a parallel portion having a flow path branched in the middle, and the high combustion fuel valve 7 is installed on one side of the parallel portion. On the other side of the parallel portion, an orifice 13 as a flow restricting means and a fuel valve 12 for transition are provided. The rotation speed changing device 3, the low combustion fuel valve 6, the high combustion fuel valve 7, the transition time fuel valve 12, and the oil pump 9 are connected to the control device 8, and the control device 8 operates each device. To control.

燃焼制御は、高燃焼・低燃焼・停止の３位置制御を行う。図２は、燃焼量を低燃焼から高燃焼へ変更し、その後高燃焼から低燃焼へ変更する場合における燃料弁の開閉状況を示したものである。低燃焼の場合、制御装置８は回転数変更装置３に対して低燃焼の指令を出力しておき、回転数変更装置３から送風機１へは低燃焼用周波数の電力を供給することで送風機１からの燃焼用空気供給量を低燃焼用供給量とする。また制御装置８は、オイルポンプ９の稼働と、低燃焼用燃料弁６を開く制御を行っておき、高燃焼用燃料弁７及び移行時用燃料弁１２は閉じておく。燃料油は低燃焼用ノズル４へのみ供給することになり、高燃焼用ノズル５への燃料供給は停止となる。低燃焼用ノズル４と高燃焼用ノズル５は同じ量の燃料を噴射するものであった場合、低燃焼用ノズル４から噴射する燃料量はバーナ全体の５０％となり、低燃焼では５０％分の燃焼を行うことになる。   Combustion control performs three-position control of high combustion, low combustion, and stop. FIG. 2 shows the open / close state of the fuel valve when the combustion amount is changed from low combustion to high combustion and then from high combustion to low combustion. In the case of low combustion, the control device 8 outputs a low combustion command to the rotation speed changing device 3 and supplies the electric power of the low combustion frequency from the rotation speed changing device 3 to the blower 1. The combustion air supply amount from is set as the low combustion supply amount. The control device 8 controls the operation of the oil pump 9 and opens the low combustion fuel valve 6 and closes the high combustion fuel valve 7 and the transition time fuel valve 12. The fuel oil is supplied only to the low combustion nozzle 4 and the fuel supply to the high combustion nozzle 5 is stopped. When the low combustion nozzle 4 and the high combustion nozzle 5 inject the same amount of fuel, the amount of fuel injected from the low combustion nozzle 4 is 50% of the entire burner, and 50% for low combustion. It will burn.

燃焼量を低燃焼から高燃焼へ変更する場合、制御装置８はまず回転数変更装置３に対して高燃焼へ移行することの指令を出力し、回転数変更装置３では高燃焼の指令を受けると（点Ａ）、送風機１への周波数が高燃焼用周波数となるように増加を開始する。制御装置８は、回転数変更装置３による周波数変更状況を監視しておき、あらかじめ設定しておいた低燃焼から高燃焼へ切り替える周波数になった時点（点Ｂ）で、移行時用燃料弁１２を開く制御を行う。移行時用燃料弁１２を開くと、移行時用燃料弁１２及びオリフィス１３を通って高燃焼用ノズル５へ燃料が送られることになり、高燃焼用ノズル５からも燃料を噴射するためバーナ２の燃焼量は増加する。この場合、移行時用燃料弁１２を設けている高燃焼用燃料供給ライン１１の並列部にはオリフィス１３を設けており、オリフィス１３が流量を制限するため、高燃焼用ノズル５へ供給する燃料量は通常よりも少ない量となる。オリフィス１３で燃料供給量を半分に制限している場合、高燃焼用ノズル５から噴射する燃料量は全体の２５％分となり、バーナ２全体への燃料供給量は７５％の移行時用燃料供給量となる。   When the combustion amount is changed from low combustion to high combustion, the control device 8 first outputs a command to shift to high combustion to the rotational speed changing device 3, and the rotational speed changing device 3 receives a high combustion command. (Point A), the increase is started so that the frequency to the blower 1 becomes a high combustion frequency. The control device 8 monitors the frequency change status by the rotation speed changing device 3, and at the time when the preset frequency (point B) for switching from low combustion to high combustion is reached (point B), the transition time fuel valve 12 is used. Control to open. When the transition time fuel valve 12 is opened, fuel is sent to the high combustion nozzle 5 through the transition time fuel valve 12 and the orifice 13, and the burner 2 injects fuel also from the high combustion nozzle 5. The amount of combustion increases. In this case, an orifice 13 is provided in a parallel portion of the high combustion fuel supply line 11 provided with the transition time fuel valve 12, and the fuel supplied to the high combustion nozzle 5 because the orifice 13 restricts the flow rate. The amount will be less than usual. When the fuel supply amount is limited to half by the orifice 13, the fuel amount injected from the high combustion nozzle 5 is 25% of the whole, and the fuel supply amount to the entire burner 2 is 75%. Amount.

移行時用燃料弁１２を開く制御を行った時から所定の遅延時間が経過すると（点Ｃ）、制御装置８は高燃焼用燃料弁７を開く制御を行う。高燃焼用燃料弁７を開くと高燃焼用ノズル５へは通常量の燃料が送られることになり、高燃焼用ノズル５から噴射する燃料量が増加する。この場合、バーナへの燃料供給量は最大量となり、バーナ２の燃焼量は１００％となる。送風機の周波数が高燃焼用の周波数になると（点Ｄ）、燃焼量移行の制御を終了し、高燃焼用の燃料供給量と燃焼用空気供給量で燃焼を行う。   When a predetermined delay time has elapsed since the control for opening the transition time fuel valve 12 is performed (point C), the control device 8 performs the control for opening the high combustion fuel valve 7. When the high combustion fuel valve 7 is opened, a normal amount of fuel is sent to the high combustion nozzle 5, and the amount of fuel injected from the high combustion nozzle 5 increases. In this case, the fuel supply amount to the burner is the maximum amount, and the combustion amount of the burner 2 is 100%. When the frequency of the blower becomes the frequency for high combustion (point D), the control of the combustion amount shift is finished, and combustion is performed with the fuel supply amount for high combustion and the air supply amount for combustion.

燃焼量を低燃焼から高燃焼へ変更する場合の空気比は、燃焼用空気供給量のみを増加し、燃料供給量は変更していない点Ａから点Ｂの間は上昇し、移行時用燃料弁１２を開くことで燃料供給量を増加する点Ｂで瞬間的に低下する。点Ｂから点Ｃの間は、燃焼用空気供給量のみを増加しており、燃料供給量は変化しないために空気比は再び上昇し、点Ｃで高燃焼用燃料弁７を開いて燃料供給量を増加すると空気比は低下する。点Ｃから点Ｄの間も空気比は上昇し、点Ｄで燃焼用空気供給量の増加を終了すると、以降の空気比は一定の値となる。   The air ratio when the combustion amount is changed from low combustion to high combustion increases only the combustion air supply amount, rises between points A and B where the fuel supply amount does not change, and fuel for transition When the valve 12 is opened, the fuel supply amount is increased, and the point B decreases instantaneously. Between point B and point C, only the combustion air supply amount increases and the fuel supply amount does not change, so the air ratio rises again. At point C, the high combustion fuel valve 7 is opened and fuel supply is performed. Increasing the amount decreases the air ratio. The air ratio also rises between point C and point D, and when the increase in the combustion air supply amount is finished at point D, the subsequent air ratio becomes a constant value.

燃焼量を高燃焼から低燃焼へ変更する場合、制御装置８はまず回転数変更装置３に対して低燃焼へ移行することの指令を出力し、回転数変更装置３では低燃焼の指令を受けると（点Ｅ）、送風機１への周波数が低燃焼用周波数となるように減少を開始する。制御装置８は、回転数変更装置３による周波数変更状況を監視しておき、あらかじめ設定しておいた高燃焼から低燃焼へ切り替える周波数になった時点（点Ｆ）で、高燃焼用燃料弁７を閉じる制御を行う。高燃焼用燃料弁７を閉じると、高燃焼用ノズル５へ送る燃料量は移行時用燃料弁１２及びオリフィス１３を通る量のみとなり、バーナへ供給する燃料量は７５％分の移行時用燃料供給量となる。   When changing the combustion amount from high combustion to low combustion, the control device 8 first outputs a command to shift to low combustion to the rotational speed changing device 3, and the rotational speed changing device 3 receives a low combustion command. (Point E), the reduction starts so that the frequency to the blower 1 becomes the low combustion frequency. The control device 8 monitors the frequency change state by the rotation speed changing device 3, and at the time point (point F) at which the preset frequency to switch from high combustion to low combustion is reached (point F), the high combustion fuel valve 7 Control to close. When the high combustion fuel valve 7 is closed, the amount of fuel sent to the high combustion nozzle 5 is only the amount passing through the transition time fuel valve 12 and the orifice 13, and the fuel amount supplied to the burner is 75% of the transition time fuel. Supply amount.

高燃焼用燃料弁７を閉じる制御を行った時から所定の遅延時間が経過すると（点Ｇ）、制御装置８は移行時用燃料弁１２を閉じる制御を行う。移行時用燃料弁１２を閉じると、高燃焼用ノズル５への燃料供給はなくなり、バーナ２での燃焼は低燃焼用ノズル４による燃焼のみとなる。送風機の周波数が低燃焼用の周波数になると（点Ｈ）、燃焼量移行の制御を終了し、低燃焼用の燃料供給量と燃焼用空気供給量で燃焼を行う。   When a predetermined delay time has elapsed since the control for closing the high combustion fuel valve 7 (point G), the control device 8 performs the control for closing the transition time fuel valve 12. When the fuel valve for transition 12 is closed, the fuel supply to the high combustion nozzle 5 is lost, and the combustion in the burner 2 is only the combustion by the low combustion nozzle 4. When the frequency of the blower becomes the frequency for low combustion (point H), the control of the combustion amount shift is finished, and combustion is performed with the fuel supply amount for low combustion and the air supply amount for combustion.

燃焼量を高燃焼から低燃焼へ変更する場合の空気比は、燃焼用空気供給量のみを減少し、燃料供給量は変更していない点Ｅから点Ｆの間は低下し、高燃焼用燃料弁７を閉じることで燃料供給量を減少する点Ｆで瞬間的に上昇する。その後点Ｆから点Ｇの間は、燃焼用空気供給量のみを減少しており、燃料供給量は変化しないために空気比は再び低下し、点Ｇで移行時用燃料弁１２を閉じて燃料供給量を減少すると空気比は上昇する。点Ｇから点Ｈの間も空気比は低下し、点Ｈで燃焼用空気供給量の減少を終了すると、以降の空気比は一定の値となる。   When the combustion amount is changed from high combustion to low combustion, the air ratio decreases only between the combustion air supply amount and the fuel supply amount does not change between points E and F, and the high combustion fuel The valve 7 is instantaneously raised at a point F where the fuel supply amount is decreased by closing the valve 7. After that, between the points F and G, only the combustion air supply amount decreases, and the fuel supply amount does not change, so the air ratio decreases again. At the point G, the fuel valve for transition 12 is closed and the fuel is supplied. The air ratio increases as the supply is reduced. The air ratio also decreases between the point G and the point H. When the reduction of the combustion air supply amount is finished at the point H, the subsequent air ratio becomes a constant value.

燃焼量を変更する時に低燃焼と高燃焼の間で直接変更していた場合、低燃焼と高燃焼の差が大きいために空気比の変動幅が大きくなっていた。しかし、燃焼量変更時に移行時用燃料供給量の状態を挟むことによって、空気比が大きく変化することを防止で、複雑な構成が必要となる燃料供給量の比例制御を行わなくても振動燃焼や燃焼衝撃を発生することなく燃焼量を変更することができる。   When the amount of combustion was changed directly between low combustion and high combustion, the variation range of the air ratio was large because the difference between low combustion and high combustion was large. However, by interposing the state of the fuel supply amount for transition when changing the combustion amount, it is possible to prevent the air ratio from changing greatly, and vibration combustion without the proportional control of the fuel supply amount requiring a complicated configuration The amount of combustion can be changed without generating a combustion shock.

本発明を実施している燃焼装置のフロー図Flow diagram of combustion apparatus embodying the present invention 本発明を実施している燃焼装置のタイムチャートTime chart of combustion apparatus implementing the present invention

符号の説明Explanation of symbols

１ 送風機
２ バーナ
３ 回転数変更装置
４ 低燃焼用ノズル
５ 高燃焼用ノズル
６ 低燃焼用燃料弁
７ 高燃焼用燃料弁
８ 制御装置
９ オイルポンプ
１０ 低燃焼用燃料供給ライン
１１ 高燃焼用燃料供給ライン
１２ 移行時用燃料弁
１３ オリフィス 1 Blower
2 Burner
3 Speed change device
4 Low combustion nozzle
5 High combustion nozzle
6 Fuel valve for low combustion
7 Fuel valve for high combustion 8 Control device 9 Oil pump 10 Fuel supply line for low combustion 11 Fuel supply line for high combustion 12 Fuel valve for transition 13 Orifice

Claims (2)

バーナへ燃焼用空気を供給する給気装置と、バーナへ燃料油を供給する低燃焼用燃料供給ライン及び高燃焼用燃料供給ラインを持ち、燃焼用空気供給量と燃料供給量を調節することにより、低燃焼と高燃焼で燃焼量の変更を可能としている油噴霧式燃焼装置において、高燃焼用燃料供給ラインの途中に並列部を設け、並列部の一方に高燃焼用燃料弁、並列部の他方側には移行時用燃料弁と流量制限手段を設けておき、燃焼量を低燃焼から高燃焼へ変更する場合には、まず空気供給量の変更を開始し、次に移行時用燃料弁を開くことで移行時用燃料供給量とし、その後に高燃焼用燃料弁を開く制御を行い、燃焼量を高燃焼から低燃焼へ変更する場合には、まず空気供給量の変更を開始し、次に高燃焼用燃料弁を閉じることで移行時用燃料供給量とし、その後に移行時用燃料弁を閉じる制御を行うことを特徴とする段階的な燃焼量変更を行う燃焼装置。   By having an air supply device that supplies combustion air to the burner, a low combustion fuel supply line that supplies fuel oil to the burner, and a high combustion fuel supply line, and by adjusting the combustion air supply amount and fuel supply amount In the oil spray combustion apparatus that enables the combustion amount to be changed between low combustion and high combustion, a parallel part is provided in the middle of the high combustion fuel supply line, and a high combustion fuel valve is provided on one side of the parallel part. The transition side fuel valve and flow rate limiting means are provided on the other side, and when changing the combustion amount from low combustion to high combustion, first the change of the air supply amount is started, and then the transition time fuel valve When changing the combustion amount from high combustion to low combustion, the air supply amount is changed first. Next, close the fuel valve for high combustion and supply the fuel for transition And, subsequently to the combustion apparatus which performs stepwise combustion amount changes and performs control to close the transition time for the fuel valve. 請求項１に記載の段階的な燃焼量変更を行う燃焼装置において、給気装置は電源の周波数を変更することで回転速度の変更を可能とした送風機であり、燃焼量を変更する場合には送風機の周波数を検出しておき、周波数の値が所定の値となると移行時用燃料供給量とし、周波数が所定の値となった時から所定の時間遅延後に移行後の燃料供給量とする制御を行うことを特徴とする段階的な燃焼量変更を行う燃焼装置。
2. A combustion apparatus for performing stepwise combustion amount change according to claim 1, wherein the air supply device is a blower capable of changing a rotational speed by changing a frequency of a power source. Control that detects the frequency of the blower, sets the fuel supply amount for transition when the frequency value reaches a predetermined value, and sets the fuel supply amount after transition after a predetermined time delay from when the frequency reaches the predetermined value A combustion apparatus for performing a step-by-step change in combustion quantity, characterized in that
JP2003414377A 2003-12-12 2003-12-12 Combustion device changing its burning capacity in stages Pending JP2005172365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003414377A JP2005172365A (en) 2003-12-12 2003-12-12 Combustion device changing its burning capacity in stages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003414377A JP2005172365A (en) 2003-12-12 2003-12-12 Combustion device changing its burning capacity in stages

Publications (2)

Publication Number Publication Date
JP2005172365A true JP2005172365A (en) 2005-06-30
JP2005172365A5 JP2005172365A5 (en) 2005-11-04

Family

ID=34734192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003414377A Pending JP2005172365A (en) 2003-12-12 2003-12-12 Combustion device changing its burning capacity in stages

Country Status (1)

Country Link
JP (1) JP2005172365A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010131300A1 (en) * 2009-05-15 2010-11-18 三浦工業株式会社 Boiler
JP2012007791A (en) * 2010-06-24 2012-01-12 Miura Co Ltd Combustion control method and combustion device
JP2012026661A (en) * 2010-07-26 2012-02-09 Samson Co Ltd Combustion amount change boiler

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010131300A1 (en) * 2009-05-15 2010-11-18 三浦工業株式会社 Boiler
CN102149969A (en) * 2009-05-15 2011-08-10 三浦工业株式会社 Boiler
KR101271107B1 (en) 2009-05-15 2013-06-04 미우라고교 가부시키카이샤 Boiler
US8573162B2 (en) 2009-05-15 2013-11-05 Miura Co., Ltd. Boiler
JP2012007791A (en) * 2010-06-24 2012-01-12 Miura Co Ltd Combustion control method and combustion device
JP2012026661A (en) * 2010-07-26 2012-02-09 Samson Co Ltd Combustion amount change boiler

Similar Documents

Publication Publication Date Title
JP2005172365A (en) Combustion device changing its burning capacity in stages
JP4238819B2 (en) Combustion equipment
JP2005147558A (en) Boiler performing low combustion by small-capacity burner
JP4656295B2 (en) Gas turbine fuel control method and apparatus
JP3031856B2 (en) Air volume adjustment method using boiler inverter
JP2008082302A (en) Gas turbine, and combustor start control method of gas turbine
JP4554153B2 (en) Boiler combustion control system
JP6168965B2 (en) Mixed combustion system and fuel gas mixing unit
WO2014167646A1 (en) Burner
JP4176686B2 (en) Combustion device with pilot burner
JP3335282B2 (en) Air volume adjustment method using boiler inverter device
JP2006138561A (en) Combustion apparatus
JP2877498B2 (en) Control device for combustion device
JP2006166551A (en) Feeding method of generated power fed from generator, and device for the method
JP2008002787A (en) Combustion apparatus
JP4256928B2 (en) Combustion air supply control device
JP2877503B2 (en) Combustion equipment
JP2014102022A (en) Combustion system and its operation control method
JPH10318502A (en) Combustion controlled boiler at three points
JP2001241653A (en) Combustion equipment
JP4791284B2 (en) Combustion device
JPH04254110A (en) Burner controller
JP4318540B2 (en) Boilers that change combustion transition timing
JPH1037716A (en) Air flow control method and device for exhaust recombustion combined cycle plant
JPS63273724A (en) Cross limit circuit for low o2 combustion

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050915

A621 Written request for application examination

Effective date: 20061107

Free format text: JAPANESE INTERMEDIATE CODE: A621

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080627

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080715

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080820

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080919

A02 Decision of refusal

Effective date: 20090204

Free format text: JAPANESE INTERMEDIATE CODE: A02