JP2000146125A - Premixing oil burner - Google Patents
Premixing oil burnerInfo
- Publication number
- JP2000146125A JP2000146125A JP10318505A JP31850598A JP2000146125A JP 2000146125 A JP2000146125 A JP 2000146125A JP 10318505 A JP10318505 A JP 10318505A JP 31850598 A JP31850598 A JP 31850598A JP 2000146125 A JP2000146125 A JP 2000146125A
- Authority
- JP
- Japan
- Prior art keywords
- premixed gas
- mixing chamber
- combustion chamber
- premixed
- chamber
- 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
Links
Landscapes
- Gas Burners (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は油の予混合バーナにおい
て、油を噴霧させるだけで予混合気を造り、円筒形燃焼
室の接線方向から該予混合気を供給し、円筒形燃焼室に
旋回火炎を造るとともに、予混合気の噴孔面積を可変に
して予混合気の逆火を防止する油バーナ、および相対的
に摺動可能な ２つの円錘の隙間を通して予混合気を噴
出させるとき、上記摺動により間隔の変わる隙間に合わ
せて高さの変わる旋回翼を設けて予混合気の旋回を助長
し、燃焼室内に旋回する火炎を造って燃焼を安定させる
油バーナを提供する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a premixed oil burner, in which a premixed gas is produced only by spraying oil, and the premixed gas is supplied from a tangential direction of a cylindrical combustion chamber to the cylinder combustion chamber. A swirling flame is created, and the premixed gas is ejected through an oil burner that changes the injection hole area of the premixed gas to prevent flashback of the premixed gas and a gap between two relatively slidable cones. At this time, an oil burner is provided in which swirling blades whose heights are changed in accordance with the gaps whose intervals are changed by the above sliding are provided to promote the swirling of the premixed gas and create a swirling flame in the combustion chamber to stabilize combustion.
【０００２】[0002]
【従来の技術】従来の予混合バーナでは予混合気の製造
が困難で、気体燃料の場合でも、燃料ガスと燃焼用空気
を均一に混合させるために大きな、あるいは長い混合室
が必要である。油の場合には一層困難で、予混合気を造
るために、油の一部を燃焼させ、噴霧を蒸発させる部分
燃焼が賞用されているが、燃焼させると高温になるた
め、混合室には耐熱性が必要になり、複雑・高価であ
る。これを避けるため、油を燃焼させないで、油の噴霧
と燃焼用空気をペブル層などの混合器に通し、油の噴霧
と燃焼用空気を均一に混合させる方法が採用されるが、
この場合には、ペブル層に油が付着し、その除去が困難
になるという問題が生じる。また、予混合バーナでは逆
火防止が最大の課題で、予混合バーナには常に逆火の懼
れがあり、このため普及が遅れていた。2. Description of the Related Art It is difficult to produce a premixed gas with a conventional premixed burner, and even in the case of gaseous fuel, a large or long mixing chamber is required to uniformly mix the fuel gas and combustion air. In the case of oil, it is even more difficult.Partial combustion, in which part of the oil is burned and the spray is evaporated, has been awarded in order to create a premixed gas mixture. Requires heat resistance and is complicated and expensive. In order to avoid this, a method is adopted in which the oil spray and the combustion air are passed through a mixer such as a pebble layer without burning the oil to uniformly mix the oil spray and the combustion air.
In this case, there is a problem that the oil adheres to the pebble layer and it becomes difficult to remove the oil. Prevention of flashback is the biggest issue in premixed burners, and premixed burners always have a risk of flashback, which has delayed their spread.
【０００３】[0003]
【発明が解決しようとする課題】予混合バーナには極端
な低ＮＯｘが得られると云う特長がある。しかし上述の
ように、予混合気の製造に困難があり、逆火の懼れがあ
る。本発明はこの２つの問題を、噴霧粒径を極端に小さ
くすることによって大きな予混合室および部分燃焼器或
いは蒸発器を省略すること、および燃焼室への予混合気
の噴孔面積を調節することにより予混合気の流速を逆火
が生じない値に保つこと、によって達成する。The premix burner has a feature that extremely low NOx can be obtained. However, as described above, there is a difficulty in producing the premixed gas, and there is a risk of flashback. The present invention addresses these two problems by eliminating large premixing chambers and partial combustors or evaporators by making the spray particle size extremely small, and adjusting the injection hole area of the premixed gas into the combustion chamber. This is achieved by maintaining the flow rate of the premixed gas at a value at which flashback does not occur.
【０００４】[0004]
【課題を解決するための手段】油の噴霧は超微粒化され
ると壁面に付着しないようになる。一方、予混合気は非
常に燃焼性がよいので、その燃焼には火炎の安定と逆火
の防止だけが問題になる。前者は例えば予混合気を旋回
させると達成され、後者は予混合気の通路に適当な流速
になる狭隘部を設ければ達成される。そこで、油の噴霧
をＳＭＤ＝５μｍにすると、噴霧器から約１ｍ離れた壁
面には油滴が付着しないので、予混合気を旋回させ、そ
の流れの距離が約１ｍになる位置に燃焼室の予混合気噴
孔を設ける。この噴霧粒径は、例えば衝突噴霧器によっ
て得られる。また、予混合気の燃焼器噴孔の面積を可変
にし、予混合気の逆火が起こらない流速を保つようにす
る。When the oil spray is made ultra-fine, it does not adhere to the wall surface. On the other hand, since the premixed gas has a very good flammability, its combustion involves only flame stability and prevention of flashback. The former is achieved, for example, by swirling the premixed gas, and the latter is achieved by providing a narrow portion having an appropriate flow velocity in the passage of the premixed gas. Therefore, if the oil spray is set to SMD = 5 μm, oil droplets do not adhere to the wall surface about 1 m away from the atomizer, so that the premixed gas is swirled and the combustion chamber is moved to a position where the flow distance is about 1 m. An air-fuel mixture injection hole is provided. This spray particle size is obtained, for example, by a collision atomizer. In addition, the area of the burner injection hole of the premixed gas is made variable so as to maintain a flow velocity at which the flashback of the premixed gas does not occur.
【０００５】[0005]
【作用】請求項１の油バーナでは、円筒形の混合室の一
端に噴霧器を設け、円筒部の外周に接線方向から燃焼用
空気を吹込む空気孔を設け、混合室の他端には円筒形燃
焼室を設けるが、この燃焼室は混合室側が閉塞され、他
端が解放になっている。燃焼室に対する予混合気の噴孔
は燃焼室の円筒部の側壁に予混合気が接線方向に噴出す
るように設けられ、予混合気は旋回しながら燃焼する。
予混合気の噴孔は面積が可変で、これを調節することに
よって予混合気の逆火が生じない流速が保たれる。In the oil burner according to the present invention, a sprayer is provided at one end of a cylindrical mixing chamber, an air hole for injecting combustion air from a tangential direction is provided on an outer periphery of the cylindrical portion, and a cylinder is provided at the other end of the mixing chamber. A combustion chamber is provided, which is closed on the mixing chamber side and open at the other end. The injection hole of the premixed gas with respect to the combustion chamber is provided on the side wall of the cylindrical portion of the combustion chamber so that the premixed gas is ejected in a tangential direction, and the premixed gas burns while turning.
The injection hole of the premixed gas has a variable area, and by adjusting this, the flow velocity at which the flashback of the premixed gas does not occur is maintained.
【０００６】請求項２のバーナでは、請求項１のバーナ
と同じ混合室の他端に相互に摺動可能な２つの円錘の隙
間から予混合気が噴出する出口が設けられるが、２つの
円錘が摺動するとき高さの変わる隙間に合わせて高さを
変える旋回翼を設けて予混合気の旋回を助長する。火炎
はこれによって安定し、予混合気の噴出速度は逆火が生
じない値に保たれる。According to the burner of the present invention, the other end of the same mixing chamber as the burner of the first invention is provided with an outlet through which a premixed gas is ejected from a gap between two mutually slidable cones. A swirler for changing the height in accordance with a gap that changes in height when the spindle slides is provided to promote the turning of the premixed gas. The flame is thereby stabilized, and the ejection speed of the premixed gas is maintained at a value at which flashback does not occur.
【０００７】油の噴霧はＳＭＤ＝５μｍ以下であり、上
述の旋回によって混合室の周囲、燃焼室に対する予混合
気の噴孔または旋回翼までの噴霧の軌跡の長さは何れも
約１ｍに伸び、それらに油滴は付着しない。また、この
旋回によって、油の噴霧と燃焼用空気は完全に混合し、
均一な予混合気を造る。The oil spray is SMD = 5 μm or less, and the length of the trajectory of the spray around the mixing chamber, the injection hole of the premixed gas to the combustion chamber or the swirler vanes is extended to about 1 m by the above-mentioned swirling. , No oil droplets adhere to them. In addition, by this turning, the oil spray and the combustion air are completely mixed,
Create a uniform premix.
【０００８】円筒形燃焼室においては、予混合気は側壁
から接線方向に噴出するので、火炎が旋回し、これによ
って燃焼は安定する。２つの円錘の隙間から予混合気が
噴出するバーナにおいては、予混合気はこの隙間に設け
た旋回翼によって旋回するので、火炎が旋回し、これに
よって燃焼は安定する。In the cylindrical combustion chamber, the premixed gas is tangentially ejected from the side wall, so that the flame swirls, thereby stabilizing the combustion. In a burner in which a premixed gas is ejected from a gap between two cones, the premixed gas is swirled by swirling blades provided in the gap, so that the flame is swirled, thereby stabilizing combustion.
【０００９】何れのバーナにおいても、燃焼室に対する
予混合気の噴孔の面積は可変で、これを調節することに
よって予混合気の流速が逆火を生じない値に保たれる。In any of the burners, the area of the injection hole of the premixed gas with respect to the combustion chamber is variable, and by adjusting this, the flow rate of the premixed gas is maintained at a value that does not cause flashback.
【００１０】[0010]
【実施例】図１は本発明の１実施例で、１は衝突型噴霧
器、２は予混合気製造・燃焼用空気噴孔、３は混合室、
４は燃焼室、５は燃焼室に対する予混合気の噴孔、６は
旋回火炎である。図２は本発明の他の実施例で、１は衝
突型噴霧器、２は予混合気製造・燃焼用空気噴孔、３は
混合室、４は予混合気の噴出孔を形成する２つの円錘４
ａと４ｂの隙間、５は旋回翼、６は旋回火炎である。FIG. 1 shows an embodiment of the present invention, wherein 1 is an impingement atomizer, 2 is an air injection hole for producing and burning a premixed gas, 3 is a mixing chamber,
Reference numeral 4 denotes a combustion chamber, 5 denotes an injection hole of a premixed gas into the combustion chamber, and 6 denotes a swirling flame. FIG. 2 shows another embodiment of the present invention, in which 1 is an impingement type atomizer, 2 is an air injection hole for producing and burning a premixed gas, 3 is a mixing chamber, and 4 is two circles forming a premixed gas ejection hole. Weight 4
The gap between a and 4b, 5 is a swirler, and 6 is a swirl flame.
【００１１】[0011]
【発明の効果】上述のように、予混合油バーナでは、従
来、予混合気を製造するために油を部分燃焼したり、大
きな混合室が必要であったり、これを避けるためにペブ
ル層などの混合器を設けたりしたが、油を超微粒化し、
燃焼用空気でこれを旋回させ、壁面までの噴霧の軌跡の
距離を必要な大きさにするという本発明によると、油の
噴霧を部分燃焼させることも、大きな混合室を設けるこ
とも、ペブル層などの混合器を設けることも必要がな
く、油を噴霧し、燃焼用空気でこれを旋回させるだけで
均一な予混合気を製造することができ、しかも混合室、
燃焼室に対する予混合気の噴孔の何れの壁面にも油滴が
付着することがない。As described above, in the premixed oil burner, the oil has been conventionally partially burned in order to produce a premixed gas, or a large mixing chamber is required. But the oil was atomized,
According to the present invention in which this is swirled by the combustion air to make the distance of the trajectory of the spray to the wall surface the required size, it is possible to partially burn the oil spray, provide a large mixing chamber, It is not necessary to provide a mixer such as, and it is possible to produce a uniform premixed gas simply by spraying oil and swirling it with combustion air.
Oil droplets do not adhere to any wall surface of the injection hole of the premixed gas with respect to the combustion chamber.
【００１２】また、請求項１のバーナでは、円筒形燃焼
室へ予混合気が接線方向に入るため、予混合気は旋回し
つつ燃焼するので、火炎は安定化し、請求項２のバーナ
では２つの円錘の間から噴出する予混合気が此処に設け
た旋回翼によって旋回しつつ供給されるので、火炎は安
定する。燃焼室に対する予混合気の噴孔面積は何れのバ
ーナでも可変であるため、これを調節すれば予混合気の
流速を逆火を生じない値に保つことができる。Further, in the burner according to the first aspect, the premixed gas enters the cylindrical combustion chamber in a tangential direction, so that the premixed gas burns while swirling, so that the flame is stabilized. Since the premixed gas ejected from between the two cones is supplied while being swirled by the swirler provided here, the flame is stabilized. Since the injection hole area of the premixed gas with respect to the combustion chamber is variable in any burner, by adjusting this, the flow rate of the premixed gas can be maintained at a value that does not cause flashback.
【図１】 本発明の１実施例を示す原理図である。FIG. 1 is a principle diagram showing one embodiment of the present invention.
【図２】 本発明の他の実施例を示す原理図である。FIG. 2 is a principle view showing another embodiment of the present invention.
Claims (2)
に小さくする噴霧器を設け、この噴霧に燃焼用空気を混
合室の側面から接線方向に供給し、これによって予混合
気を造ると同時に予混合気を旋回させ、混合室の他端に
混合室の内径より小さい円筒形燃焼室を設け、この円筒
形燃焼室の混合室側の一端は閉鎖し、他端は解放とし、
円筒形燃焼室の側面の混合室側には予混合気が接線方向
から入る予混合気噴孔を設け、円筒形燃焼室内で旋回す
る火炎を造ること、および円筒形燃焼室に予混合気を噴
出する噴孔の面積を可変にして、予混合気の逆火を防止
することを特長とする予混合油バーナ。At least one end of a cylindrical mixing chamber is provided with a sprayer for extremely reducing the spray particle diameter, and combustion air is supplied to the spray from the side of the mixing chamber in a tangential direction, thereby producing a premixed air-fuel mixture. At the same time, the premixed gas is swirled, and a cylindrical combustion chamber smaller than the inside diameter of the mixing chamber is provided at the other end of the mixing chamber. One end of the cylindrical combustion chamber on the mixing chamber side is closed, and the other end is opened.
A premixed gas injection hole through which the premixed gas enters from the tangential direction is provided on the side of the mixing chamber on the side of the cylindrical combustion chamber to create a flame that swirls inside the cylindrical combustion chamber, and ejects the premixed gas into the cylindrical combustion chamber. A premixed oil burner characterized by making the area of the injection hole variable to prevent flashback of the premixed gas.
に小さくする噴霧器を設け、この噴霧に燃焼用空気を混
合室の側面から接線方向に供給し、これによって予混合
気を造ると同時に予混合気を旋回させ、混合室の他端に
円錘形予混合気出口を台形の上辺の直径が混合室の内径
より小さく下辺が出口となるように設け、これに円錘の
軸方向に摺動可能な円錘形詰め物を嵌入し、両円錘の隙
間を通る予混合気が上記混合室で与えられた旋回力によ
って旋回しつつ燃焼室に噴出する場合、上記両円錘筒が
摺動するときその隙間は間隔が変わるが、これに合わせ
てその高さが変わる予混合気用旋回翼を設け、これによ
って予混合気の旋回を助長することによって燃焼室内で
旋回する火炎を造ることを特長とする予混合油バーナ。2. An atomizer for extremely reducing the spray particle diameter is provided at one end of a cylindrical mixing chamber, and combustion air is supplied to the spray in a tangential direction from a side surface of the mixing chamber, thereby producing a premixed air-fuel mixture. At the same time, the premixed gas is swirled, and a cone-shaped premixed gas outlet is provided at the other end of the mixing chamber such that the diameter of the trapezoidal upper side is smaller than the inner diameter of the mixing chamber and the lower side is the outlet, and the spindle of the cone is provided on this. When the premixed gas passing through the gap between the two cylinders is injected into the combustion chamber while being swirled by the swirling force given by the mixing chamber, the two cylinders are inserted. When the gap slides, the spacing changes, but the swirling vanes for the premixed gas whose height changes according to the gap are provided, thereby promoting the swirling of the premixed gas, thereby preventing the flame swirling in the combustion chamber. Premix oil burner characterized by building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10318505A JP2000146125A (en) | 1998-11-10 | 1998-11-10 | Premixing oil burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10318505A JP2000146125A (en) | 1998-11-10 | 1998-11-10 | Premixing oil burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000146125A true JP2000146125A (en) | 2000-05-26 |
Family
ID=18099878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10318505A Pending JP2000146125A (en) | 1998-11-10 | 1998-11-10 | Premixing oil burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000146125A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1552132A1 (en) * | 2002-05-28 | 2005-07-13 | Lytesyde, LLC | Turbine engine apparatus and method |
| WO2014203780A1 (en) * | 2013-06-17 | 2014-12-24 | 株式会社Istc | Gas jet device |
-
1998
- 1998-11-10 JP JP10318505A patent/JP2000146125A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1552132A1 (en) * | 2002-05-28 | 2005-07-13 | Lytesyde, LLC | Turbine engine apparatus and method |
| EP1552132A4 (en) * | 2002-05-28 | 2005-10-26 | Lytesyde Llc | Turbine engine apparatus and method |
| WO2014203780A1 (en) * | 2013-06-17 | 2014-12-24 | 株式会社Istc | Gas jet device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1413830B1 (en) | Piloted airblast fuel injector with modified air splitter | |
| US5351477A (en) | Dual fuel mixer for gas turbine combustor | |
| US6272840B1 (en) | Piloted airblast lean direct fuel injector | |
| US5251447A (en) | Air fuel mixer for gas turbine combustor | |
| CA2056589C (en) | Air fuel mixer for gas turbine combustor | |
| US6141967A (en) | Air fuel mixer for gas turbine combustor | |
| CN106500130B (en) | A kind of three-level layered portion lean premixed combustor of main combustion stage fuel-firing preheating prevapourising | |
| CN107543201B (en) | One kind is oil-poor directly to spray and mixes low pollution combustor | |
| US6655145B2 (en) | Fuel nozzle for a gas turbine engine | |
| US5461865A (en) | Tangential entry fuel nozzle | |
| JPH01203809A (en) | Premixing type combustion method of liquid fuel | |
| US20060059915A1 (en) | Effervescence injector for an aero-mechanical system for injecting air/fuel mixture into a turbomachine combustion chamber | |
| US8429914B2 (en) | Fuel injection system | |
| CN101435585A (en) | Gas turbine combined type fuel evaporating and atomizing combustion apparatus | |
| JP2017519172A (en) | Air fuel premixer for low emission gas turbine combustors. | |
| US20050050895A1 (en) | Homogenous mixture formation by swirled fuel injection | |
| CN103047683A (en) | Partial premixing and pre-evaporation combustion chamber with three-level oil passages | |
| CN108592084A (en) | A kind of main combustion stage matches the low emission combustor head of blade injection structure using the pre- diaphragm plate of axial rotational flow | |
| JP2005344981A (en) | Gas turbine combustor, and method for supplying fuel to gas turbine combustor | |
| EP2340398B1 (en) | Alternately swirling mains in lean premixed gas turbine combustors | |
| CN205299615U (en) | Membrane structure reaches and mixes prevapourising combustion chamber in advance | |
| JPH10185196A (en) | Prevaporization and premixing structure for liquid fuel in gas turbine combustor | |
| JPH06341611A (en) | Method and burner of minimally inhibiting quality of nox discharged from combustion | |
| JP2000146125A (en) | Premixing oil burner | |
| JP2006329587A (en) | Swirl burner for liquid fuel |