JPS6056250B2 - Gas purge system for fuel nozzle - Google Patents
Gas purge system for fuel nozzleInfo
- Publication number
- JPS6056250B2 JPS6056250B2 JP14973176A JP14973176A JPS6056250B2 JP S6056250 B2 JPS6056250 B2 JP S6056250B2 JP 14973176 A JP14973176 A JP 14973176A JP 14973176 A JP14973176 A JP 14973176A JP S6056250 B2 JPS6056250 B2 JP S6056250B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- nozzle
- gas
- fuel oil
- purge air
- 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
Links
Landscapes
- Spray-Type Burners (AREA)
Description
【発明の詳細な説明】
本発明は、燃料ガス及び燃料油のいずれかを切替え使
用する２重燃料方式のガスタービン用燃焼器における燃
料ノズル用ガスパージ系統に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas purge system for a fuel nozzle in a dual fuel type gas turbine combustor that selectively uses either fuel gas or fuel oil.
第１図は本発明の一実施例を示す系統図（Ａの部分が
本発明により付加する部分）であるが、まずこの第１図
及び第２図を参照して従来技術の説明を行なう。FIG. 1 is a system diagram showing an embodiment of the present invention (the part A is added according to the present invention). First, the prior art will be explained with reference to FIGS. 1 and 2.
２重燃料方式の燃焼器１４の燃料ノズル１３は、燃料油
を霧状にして燃焼器１４内に噴出する燃料油ノズル２１
と、該ノズル２１を包Ｊ、にＬ」−Ｊ、４ゼ：、１１ゝ
゛ Ｊ、！ エルｌを−−ｌ！ｔｊ■Ｉ４Ａ−五−゛一
↓□−ャー ・ 、 一ー隋分にガス噴射孔１９を設け
たガスノズル２２とからなり、これらのノズルのうちい
ずれか一方から燃料を燃焼器１４内に導入して燃焼させ
るものである。The fuel nozzle 13 of the dual fuel type combustor 14 is a fuel oil nozzle 21 that sprays fuel oil into the combustor 14 in the form of a mist.
And, the nozzle 21 is wrapped J, to L''-J,4ze:,11ゝ゛J,! L--l! tj■I4A-5-゛1↓□-a - Consists of a gas nozzle 22 provided with a gas injection hole 19 at one end, and fuel is introduced into the combustor 14 from either one of these nozzles. It is used for combustion.
すなわち、燃料としてガスを使用する場合は、開閉及び
流量制御の機能を有する制御弁１６を開けて燃料ガス入
口１からの燃料ガスを燃料ガス供給管２３を通して燃料
ガス導入口１５より燃料ノズル１３内の内空部２４に導
入し、ガス噴射孔１９から燃焼器１４内に噴入して燃焼
を行なう一方、燃料として燃料油を使用する場合は、燃
料油を燃料油入口１０から逆止弁１１を有する燃料油供
給管２５を通して燃料油ノズル２１に導き、該燃料油ノ
ズル２１から燃焼器１４に噴霧して燃焼させる。燃料油
運転から燃料ガス運転に切替える場合は、燃料油ノズル
２１内の油を排出するために、油パージ空気入口１２か
ら逆止弁２０を有するパージ空気導入管２６を通して空
気を燃料油ノズル２１内に送つてノズル内に溜る油を燃
焼器１４内に排出する。従つて燃料ガス運転時に燃料油
ノズル２１内で燃料油が燃焼するようなことはない。し
カルながら、燃料油運転の場合、燃料油ノズル２１から
噴霧された油が霧状となつてガス噴射孔１９より燃料ガ
スノズル２２の内空部２４内に吹き込まれ、燃焼によつ
て周囲温度が高くなつてきた時に内空部２４内で燃料油
がカーボン化して高温を発生させる。この現象の繰り返
しによつてカーボン１８が燃料ガスノズル２２内に集積
し、カーボン１８が燃料として燃焼し、燃料ノズル１３
を灼熱させる。燃料ノズル１３が灼熱することにより、
燃料ノズル１３の変形、焼付を生じて燃料が正常に供給
されなくなるおそれがある上、溶接部にクラックが発生
してこのクラックより燃料油又は燃料ガスが漏れ、爆発
事故等のガスタービン運転士及び保安上の重大事故を発
生させるおそれがある。本発明は、上記２重燃料方式の
燃焼器において、燃料油運転時の霧状化した燃料油の燃
料ガスノズル内への逆流を防止し、もつて燃料ノズルの
変形、焼付及びクラックの発生をなくすことにより、前
記のような事故の発生を未然に防止することを目的とす
る。That is, when using gas as fuel, open the control valve 16 that has the function of opening/closing and controlling the flow rate, and the fuel gas from the fuel gas inlet 1 is passed through the fuel gas supply pipe 23 and into the fuel nozzle 13 from the fuel gas inlet 15. When fuel oil is used as fuel, it is introduced into the inner space 24 of the fuel oil inlet 10 and injected into the combustor 14 from the gas injection hole 19 to perform combustion. The fuel oil is introduced into the fuel oil nozzle 21 through the fuel oil supply pipe 25 having a fuel oil supply pipe 25, and is sprayed from the fuel oil nozzle 21 into the combustor 14 to be burned. When switching from fuel oil operation to fuel gas operation, air is introduced into the fuel oil nozzle 21 from the oil purge air inlet 12 through the purge air introduction pipe 26 having the check valve 20 in order to discharge the oil in the fuel oil nozzle 21. The oil accumulated in the nozzle is discharged into the combustor 14. Therefore, fuel oil will not be burned in the fuel oil nozzle 21 during fuel gas operation. However, in the case of fuel oil operation, the oil sprayed from the fuel oil nozzle 21 becomes a mist and is blown into the inner space 24 of the fuel gas nozzle 22 from the gas injection hole 19, and the ambient temperature is lowered by combustion. When the temperature rises, the fuel oil turns into carbon in the inner space 24 and generates a high temperature. By repeating this phenomenon, carbon 18 accumulates in the fuel gas nozzle 22, and the carbon 18 is burned as fuel, and the fuel nozzle 13
to scorch. As the fuel nozzle 13 becomes scorching,
In addition to deforming or seizing the fuel nozzle 13, which may prevent fuel from being properly supplied, cracks may occur in the welds and fuel oil or gas may leak from the cracks, causing explosions and other hazards to gas turbine operators and others. There is a risk of causing a serious safety accident. The present invention prevents the backflow of atomized fuel oil into the fuel gas nozzle during fuel oil operation in the dual fuel type combustor, thereby eliminating deformation, seizure, and cracking of the fuel nozzle. By doing so, the purpose is to prevent accidents such as those mentioned above from occurring.
本発明は、燃料油運転時に燃料ガスノズルにパージ空気
を導入する系統を設置し、該パージ空気により燃料ガス
ノズルの内空部に常時ガス噴射孔に向かう気流を生じさ
せることにより、霧状化した燃料油の逆流を防止したこ
とを特徴とする。The present invention installs a system for introducing purge air into the fuel gas nozzle during fuel oil operation, and uses the purge air to constantly generate an airflow toward the gas injection hole in the inner space of the fuel gas nozzle, thereby producing atomized fuel. It is characterized by preventing oil backflow.
すなわち、第１図の実施例に示すように、燃料ガス供給
系統２３にパージ空気を供給する系統Ａを設置する。こ
の系統Ａにおいて、２はパージ空気入口、６は該入口か
らのパージ空気の導入停止及び流量調整を司どる制御弁
、３は該制御弁６の制御空気を導入する空気入口、４は
入口３からの空気を燃料油運転時に制御弁６に供給する
ように動作制御される電磁弁、５は制御弁６の開度を所
定の開度に保つための制御空気の圧力調整弁、９は燃料
ガス供給系統２３内の燃料ガス２３が逆流して漏洩しな
いようにするための逆止弁、７は燃料ガス運転時に逆止
弁９から燃料ガスが万一漏洩した場合を考慮して設置し
たエアーベントであり、該エアーベントに取付けた電磁
弁８は、燃料油運転時に閉、燃料ガス運転時に開として
おくものである。この構成において、燃料油運転の際は
燃料ガス制御弁１６及び電磁弁８は閉とし、燃料油供給
系統２５から燃料油ノズル２１を通して燃料油を燃焼器
１４内に噴霧する。That is, as shown in the embodiment of FIG. 1, a system A for supplying purge air to the fuel gas supply system 23 is installed. In this system A, 2 is a purge air inlet, 6 is a control valve that controls the introduction stop and flow rate adjustment of purge air from the inlet, 3 is an air inlet that introduces the control air of the control valve 6, and 4 is an inlet 3 5 is a control air pressure regulating valve for maintaining the opening degree of the control valve 6 at a predetermined opening degree; 9 is a fuel oil pressure regulating valve whose operation is controlled to supply air from the fuel oil to the control valve 6 during fuel oil operation; A check valve 7 is used to prevent the fuel gas 23 in the gas supply system 23 from flowing backward and leaking, and 7 is an air valve installed in case fuel gas leaks from the check valve 9 during fuel gas operation. A solenoid valve 8 attached to the air vent is closed during fuel oil operation and opened during fuel gas operation. In this configuration, during fuel oil operation, the fuel gas control valve 16 and the electromagnetic valve 8 are closed, and fuel oil is sprayed into the combustor 14 from the fuel oil supply system 25 through the fuel oil nozzle 21.
この場合、電磁弁４を開け、制御空気入口３からの制御
空気を圧力調整弁５で一定圧として制御弁６に供給する
ことにより、制御弁６を一定開度に開け、入口２からの
パージ空気を逆止弁９、パージ空気供給管２７、及び燃
料ガス供給管２３を介して第２図に示した内空部２４に
導入し、ガス噴射孔１９から燃焼器１４内に入れる。従
つて、内空部２４においては、常に空気がガス噴射孔１
９に向かつて流れるので、霧状化した燃料油が内空部２
４内に逆流することはない。従つて燃料油の内空部２４
におけるカーボン化及びその燃焼が起らないので、燃料
ノズル１３が高温となることはなく、その変形、焼付、
クラックの発生を防止することが可能となる。なお制御
弁６に付帯したリミットスイッチ１７は、制御弁６の動
作を確認するものである。燃料ガス運転時には電磁弁４
を閉めることにより制御弁６を閉め、燃料ガス制御弁１
６を開けて燃料ガスを燃焼器内に供給すると共に、逆止
弁９を通しての燃料ガスの漏洩を考慮して電磁弁８を開
け、漏洩燃料ガスはエアーベント７より排出されるよう
にする。第３図は本発明の他の実施例を示す系統図で、
第１図の逆止弁９の代りに、制御弁６と連動する制御弁
６″を設けたものである。In this case, by opening the solenoid valve 4 and supplying the control air from the control air inlet 3 to the control valve 6 at a constant pressure using the pressure regulating valve 5, the control valve 6 is opened to a constant opening degree, and the purge from the inlet 2 is performed. Air is introduced into the inner space 24 shown in FIG. 2 via the check valve 9, the purge air supply pipe 27, and the fuel gas supply pipe 23, and enters the combustor 14 through the gas injection hole 19. Therefore, in the inner space 24, air always flows through the gas injection hole 1.
9, the atomized fuel oil flows toward the inner space 2.
There is no backflow within 4. Therefore, the inner cavity 24 of fuel oil
Since carbonization and combustion do not occur in the fuel nozzle 13, the temperature of the fuel nozzle 13 does not increase, and deformation, seizure, and
It becomes possible to prevent the occurrence of cracks. Note that a limit switch 17 attached to the control valve 6 is used to check the operation of the control valve 6. Solenoid valve 4 during fuel gas operation
The control valve 6 is closed by closing the fuel gas control valve 1.
6 is opened to supply fuel gas into the combustor, and in consideration of the leakage of fuel gas through the check valve 9, the solenoid valve 8 is opened so that the leaked fuel gas is discharged from the air vent 7. FIG. 3 is a system diagram showing another embodiment of the present invention,
In place of the check valve 9 shown in FIG. 1, a control valve 6'' interlocked with the control valve 6 is provided.
このような構成とすれば、制御弁が２個となるのでコス
ト高になるという不具合はあるが、しかし２個の制御弁
を強制的に作動させるので、より安全側になる利点があ
る。なお制御弁６，６″を空気圧によつて制御されるよ
うなものでない、例えば電磁弁等におき換えることもで
きる。なお、第１図及び第３図の実施例においては、燃
料ガス供給系統２３を通してパージ空気を送り込むよう
に構成したので、既存の燃料ノズルを加工することなく
パージ系統を設置しうるからより経済的である。With such a configuration, there is a problem that the cost is high because there are two control valves, but there is an advantage that it is safer because the two control valves are forced to operate. Note that the control valves 6 and 6'' may be replaced with ones that are not controlled by air pressure, such as electromagnetic valves.In addition, in the embodiments shown in FIGS. 1 and 3, the fuel gas supply system Since the purge air is sent through the fuel nozzle 23, the purge system can be installed without modifying the existing fuel nozzle, which is more economical.
以上に説明したように、本発明は、２重燃料方式の燃焼
器において、燃料油運転時に燃料ガスノズルパージ空気
を送り込むようにしたので、霧状化した燃料油の燃料ガ
スノズル内への逆流が防止され、燃料油のカーボン化に
伴う燃料ノズルの高温発生がなくなるので、燃料ノズル
の焼付、変形の問題が解消されるから、長時間にわたつ
て燃料゛ノズルからの正常な燃料の供給を確保すること
ができる。As explained above, in a dual fuel type combustor, the present invention sends fuel gas nozzle purge air during fuel oil operation, thereby preventing atomized fuel oil from flowing back into the fuel gas nozzle. This eliminates the generation of high temperatures in the fuel nozzle due to carbonization of fuel oil, which eliminates the problems of fuel nozzle seizure and deformation, ensuring normal fuel supply from the fuel nozzle over a long period of time. be able to.
また本発明により燃料ノズルにおけるクラックの発生を
防止しうるから、爆発事故等の重大事態の発生を未然に
防止することができる。Furthermore, since the present invention can prevent the occurrence of cracks in the fuel nozzle, it is possible to prevent serious situations such as explosions from occurring.
第１図は本発明の一実施例を示す系統図、第２図は本発
明の対象となる燃料ノズルの一例を示す断面図、第３図
は本発明の他の実施例を示す系統図である。
符号の説明１・・・燃料ガス入口、２・・・パージ空気
入口、３・・・制御空気入口、６，６″・・・パージ空
気制御弁、９，１１，２０・・・逆止弁、１０・・・燃
料油入口、１３・・・燃料ノズル、１４・・・燃焼器、
１５・・・燃料ガス導入口、１６・・・燃料ガス制御弁
、１９・・・ガス噴射孔、２１・・・燃料油ノズル、２
２・・・燃料ガスノズル、２３・・・燃料ガス供給管、
２７・・・パージ空気供給管。Fig. 1 is a system diagram showing one embodiment of the present invention, Fig. 2 is a sectional view showing an example of a fuel nozzle to which the invention applies, and Fig. 3 is a system diagram showing another embodiment of the invention. be. Explanation of symbols 1... Fuel gas inlet, 2... Purge air inlet, 3... Control air inlet, 6, 6''... Purge air control valve, 9, 11, 20... Check valve , 10... fuel oil inlet, 13... fuel nozzle, 14... combustor,
15... Fuel gas inlet, 16... Fuel gas control valve, 19... Gas injection hole, 21... Fuel oil nozzle, 2
2... Fuel gas nozzle, 23... Fuel gas supply pipe,
27...Purge air supply pipe.
Claims (1)
ルを備えた２重燃料方式のガスタービン用燃焼器の燃料
系統において、前記燃料ガスノズルにパージ空気を送り
込むパージ空気供給系統と、該パージ空気供給系統に設
置され、燃料油運転時にのみパージ空気を通す制御手段
とを備えた燃料ノズル用ガスパージ系統。 ２ 前記パージ空気供給系統は燃料ガス供給系統に接続
して設置され、パージ空気は該燃料ガス供給系統を通し
て燃料ガスノズルに導入されるように構成した特許請求
の範囲第１項記載の燃料ノズル用ガスパージ系統。[Scope of Claims] 1. In a fuel system of a dual fuel type gas turbine combustor equipped with a fuel nozzle consisting of a fuel oil nozzle and a fuel gas nozzle, a purge air supply system that sends purge air to the fuel gas nozzle; A gas purge system for a fuel nozzle, comprising a control means installed in the purge air supply system and for passing purge air only during fuel oil operation. 2. The gas purge for a fuel nozzle according to claim 1, wherein the purge air supply system is installed connected to a fuel gas supply system, and the purge air is introduced into the fuel gas nozzle through the fuel gas supply system. system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14973176A JPS6056250B2 (en) | 1976-12-15 | 1976-12-15 | Gas purge system for fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14973176A JPS6056250B2 (en) | 1976-12-15 | 1976-12-15 | Gas purge system for fuel nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5375530A JPS5375530A (en) | 1978-07-05 |
| JPS6056250B2 true JPS6056250B2 (en) | 1985-12-09 |
Family
ID=15481571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14973176A Expired JPS6056250B2 (en) | 1976-12-15 | 1976-12-15 | Gas purge system for fuel nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6056250B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001241333A (en) * | 2000-02-29 | 2001-09-07 | General Electric Co <Ge> | Dual orifice bypass system for binary fuel gas turbine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5669611U (en) * | 1979-11-05 | 1981-06-09 |
-
1976
- 1976-12-15 JP JP14973176A patent/JPS6056250B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001241333A (en) * | 2000-02-29 | 2001-09-07 | General Electric Co <Ge> | Dual orifice bypass system for binary fuel gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5375530A (en) | 1978-07-05 |
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