JPH0268421A - Liquid fuel burner - Google Patents
Liquid fuel burnerInfo
- Publication number
- JPH0268421A JPH0268421A JP63220052A JP22005288A JPH0268421A JP H0268421 A JPH0268421 A JP H0268421A JP 63220052 A JP63220052 A JP 63220052A JP 22005288 A JP22005288 A JP 22005288A JP H0268421 A JPH0268421 A JP H0268421A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- combustion
- hole
- air
- forming hole
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims description 48
- 239000007788 liquid Substances 0.000 title claims description 25
- 238000002485 combustion reaction Methods 0.000 claims abstract description 69
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 238000009834 vaporization Methods 0.000 claims description 11
- 230000008016 vaporization Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000005192 partition Methods 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004091 panning Methods 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/14—Controlling burners with gasification or vaporizer elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2239/00—Fuels
- F23N2239/06—Liquid fuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Spray-Type Burners (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は液体燃料を強制気化して燃焼する液体燃料燃焼
装置に関するもので、特に、火炎形成部分の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid fuel combustion device that forcibly vaporizes and burns liquid fuel, and particularly relates to an improvement in a flame forming portion.
［従来の技術］
従来のこの種の液体燃料燃焼装置として、実開昭５５−
１６２７１６号公報に掲載の技術を挙げることができる
。[Prior art] As a conventional liquid fuel combustion device of this type,
The technique disclosed in Japanese Patent No. 162716 can be mentioned.
第３図は従来の液体燃料燃焼装置を示す要部断面図、第
４図は従来の液体燃料燃焼装置の安定燃焼範囲を破線で
示す特性図、第５図は従来の液体燃料燃焼装置の炎電流
検出器の検出特性を破線で示す特性図でおる。Fig. 3 is a cross-sectional view of the main parts of a conventional liquid fuel combustion device, Fig. 4 is a characteristic diagram showing the stable combustion range of the conventional liquid fuel combustion device with broken lines, and Fig. 5 is a flame diagram of the conventional liquid fuel combustion device. This is a characteristic diagram showing the detection characteristics of the current detector with broken lines.
図において、（３）は図示しない本体ケーシング内に収
容された有底筒状の燃焼器であり、外筒（４）と内筒（
５）とからなっている。（６）は前記燃焼器（３）の底
部に埋設されたヒータ、（７）は前記外筒（４）に形成
された一次空気供給口、（８）は前記−次空気供給口（
７）に挿通］
された燃料噴射ノズル、（９）は前記外筒（４）と内筒
（５）との間に渦巻状の通路として形成された気化混合
室、（１０）は前記気化混合室（９）の上面を覆う隔壁
板であり、その一部には連通孔（１１）が形成されてい
る。In the figure, (3) is a bottomed cylindrical combustor housed in a main body casing (not shown), with an outer cylinder (4) and an inner cylinder (
5) It consists of. (6) is a heater embedded in the bottom of the combustor (3), (7) is a primary air supply port formed in the outer cylinder (4), and (8) is a primary air supply port (
7)] a fuel injection nozzle, (9) a vaporization mixing chamber formed as a spiral passage between the outer cylinder (4) and the inner cylinder (5), and (10) a vaporization mixing chamber formed as a spiral passage; This is a partition plate that covers the upper surface of the chamber (9), and a communication hole (11) is formed in a part of the partition plate.
（１２）は前記隔壁板（１０）の上方において外筒（４
）と内筒（５）との間に横架された第１バーナプレート
であり、その中央部には混合気通過口（１３）が穿設さ
れてあり、その外周部には前記気化混合室（９）からの
混合気を燃焼器（３）の外周部から噴出して外側火炎（
「１）を形成する多数の溝状の第１火炎形成孔（１４）
が形成されている。(12) is an outer cylinder (4) above the partition plate (10).
) and the inner cylinder (5), the central part of which is bored with an air-fuel mixture passage port (13), and the outer periphery of which is connected to the vaporization mixing chamber. The air-fuel mixture from (9) is ejected from the outer periphery of the combustor (3) and the outer flame (
A number of groove-shaped first flame forming holes (14) forming "1)
is formed.
（１５）は前記第１バーナプレート（１２）上に配置さ
れた第２バーナプレー１〜であり、その内側及び外側部
分には、前記第１火炎形成孔（１４）の内側から混合気
を噴出して内側火炎（Ｆ２）を形成する第２火炎形成孔
（３１）及び（３２）かそれぞれ多数個環状に列設され
ている。そして、第１火炎形成孔（１４）の単位時間当
りの炎孔負荷率（Ｋｃａｌ／ｍ尻）、すなわち、燃焼量
が、第２火炎形成孔（３１）、（３２）のそれよりも、
例えば、はぼ６対４の割合で大きくなるように、第１火
炎形成孔（１４）の開口面積の総和が第２火炎形成孔（
３１）、（３２）のそれよりも大きく設定されている。(15) is the second burner plate 1~ arranged on the first burner plate (12), and the air-fuel mixture is ejected from the inside of the first flame forming hole (14) into the inner and outer parts thereof. A large number of second flame forming holes (31) and (32) for forming an inner flame (F2) are arranged in a ring shape. The flame hole load rate (Kcal/m bottom) of the first flame forming hole (14) per unit time, that is, the combustion amount, is higher than that of the second flame forming hole (31) and (32).
For example, the total opening area of the first flame forming holes (14) may be increased by a ratio of 6:4 to the second flame forming holes (14).
31) and (32).
（３７）は前記第１火炎形成孔（１４）に形成される外
側火炎（Ｆｌ）の炎電流に基づて混合気の不完全燃焼を
検出する炎電流検出器、（１７）は燃焼器（３）の中央
に貫通形成された二次中央空気通路、（１８〉は燃焼器
（３）の外周と前記本体ケーシングとの間に形成された
二次外周空気通路である。なあ、燃焼器（３）に供給さ
れる燃焼用空気は、−次空気供給口（７）に「６」、二
次中央空気通路（１７）に「２」、二次外周空気）ｍ路
（１８Ｈこ「２ｊの割合で分配して供給される。(37) is a flame current detector that detects incomplete combustion of the air-fuel mixture based on the flame current of the outer flame (Fl) formed in the first flame forming hole (14); (17) is a combustor ( (18) is a secondary peripheral air passage formed between the outer periphery of the combustor (3) and the main body casing. 3), the combustion air supplied to It is distributed and supplied in proportion.
次に、上記のように構成された従来の液体燃料燃焼装置
の動作を説明する。Next, the operation of the conventional liquid fuel combustion apparatus configured as described above will be explained.
燃Ｊ’３１噴ｑ４ノズル（８〉からの液体燃料と一次空
気供給口（７）からの−次空気とは、ヒータ（６）で加
熱された気化混合室（９）内を渦巻状に旋回しながら気
化混合されて混合気となる。この混合気は隔壁板（１０
）の連通孔（１１）及び第１バーナプレー１へ（１２）
の混合気通過口（１３）を通って第１火炎形成孔（１４
）及び第２火炎形成孔（３１）、（３２）に導かれる。The liquid fuel from the fuel J'31 injection q4 nozzle (8) and the secondary air from the primary air supply port (7) swirl in a vaporization mixing chamber (9) heated by the heater (6). The mixture is vaporized and mixed to form a mixture.This mixture is passed through the bulkhead plate (10
) to the communication hole (11) and the first burner play 1 (12)
through the air-fuel mixture passage port (13) to the first flame forming hole (14).
) and the second flame forming holes (31), (32).
この状態で、図示しない点火手段が作動すると、燃焼器
（３〉の外周部に第１火炎形成孔（１４）から外側火炎
（Ｆｌ）が形成されるとともに、燃焼器（３）の内側に
第２火炎形成孔（３１）。In this state, when the ignition means (not shown) is activated, an outer flame (Fl) is formed from the first flame forming hole (14) on the outer circumference of the combustor (3), and a second flame is formed inside the combustor (3). 2 flame forming holes (31).
（３２）から内側火炎（Ｆ２）が形成される。そして、
外側火炎（Ｆｌ）は二次外周空気通路（１８）から、ま
た、内側火炎（「２）は二次中央空気通路（１７）から
それぞれ二次空気の供給を受けて燃焼する。From (32) an inner flame (F2) is formed. and,
The outer flame (Fl) is supplied with secondary air from the secondary peripheral air passage (18), and the inner flame (2) is supplied with secondary air from the secondary central air passage (17) for combustion.
［発明が解決しようとする課題］
ところが、従来の液体燃料燃焼装置は、第１火炎形成孔
（１４〉の開口面積の総和が第２火炎形成孔（３１）、
（３２）のそれよりも大きくなるように構成されている
から、第１火炎形成孔（１４）の燃焼量か大ぎくなって
、外側火炎（Ｆｌ）か内側火炎（ト２）よりも長く形成
される。そして、二次外周空気通路（１８）からの二次
空気で外側火炎（Ｆｌ）が内側に屈曲されて内側火炎（
Ｆ２）に干渉する。[Problems to be Solved by the Invention] However, in the conventional liquid fuel combustion device, the sum of the opening areas of the first flame forming holes (14) is larger than that of the second flame forming holes (31),
(32), the combustion amount of the first flame forming hole (14) becomes large and the flame is formed longer than the outer flame (Fl) or the inner flame (G2). be done. Then, the outer flame (Fl) is bent inward by the secondary air from the secondary outer peripheral air passage (18), and the inner flame (Fl) is bent inward.
F2).
この外側火炎（１〉と内側火炎（２）とが相互干渉する
燃焼状態においては、第４図に破線で示すように、許容
濃度以上の一酸化炭素が発生するときの燃焼用空気量の
下限を示すＣＯ発生空気量下限ラインと、許容濃度以上
の一酸化炭素が発生するときの燃焼用空気量の上限を示
すＣＯ発生空気量上限ラインとの間の安定燃焼範囲が比
較的小領域となり、燃焼器（３）に設定される運転制御
範囲が高燃焼量及び高空気量の領域に移行し、燃焼器（
３）の燃焼効率が低下する。In this combustion state where the outer flame (1) and the inner flame (2) interfere with each other, as shown by the broken line in Figure 4, the lower limit of the amount of combustion air when carbon monoxide exceeding the allowable concentration is generated. The stable combustion range between the CO generation air amount lower limit line indicating the CO generation amount and the CO generation air amount upper limit line indicating the upper limit of the amount of combustion air when carbon monoxide exceeding the allowable concentration is generated is a relatively small area, The operation control range set for the combustor (3) shifts to the high combustion amount and high air amount area, and the combustor (
3) Combustion efficiency decreases.
また、第５図に破線で示すように、前記炎電流検出器（
３７）が検出した炎電流値は、外側火炎（１）と内側火
炎（２）との相互干渉か発生する特定の燃焼用空気量の
ときに異常に低下するため、燃焼器（３）の設定空気量
範囲内における炎電流値の変化１（Ｇ２）か僅かとなる
。したがって、燃焼器（３）の不完全燃焼を判断する一
酸化炭素濃度の検出レベルか高くなり、不完全燃焼時に
燃焼運転を停止するタイミングか遅れることかあつ１こ
。Moreover, as shown by the broken line in FIG. 5, the flame current detector (
The flame current value detected by 37) decreases abnormally when a certain amount of combustion air occurs, which may be caused by mutual interference between the outer flame (1) and inner flame (2), so the setting of the combustor (3) The change in flame current value within the air amount range is only 1 (G2). Therefore, the detection level of the carbon monoxide concentration, which is used to determine incomplete combustion in the combustor (3), becomes high, and the timing to stop the combustion operation at the time of incomplete combustion may be delayed.
そこで、本発明は高い燃焼効率が得られ、しかも、炎電
流検出器の不完全燃焼検出能力を向トてきる液体燃料燃
焼装置の提供を課題とするものである。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a liquid fuel combustion device that achieves high combustion efficiency and improves the ability of a flame current detector to detect incomplete combustion.
［課題を解決するための手段］
本発明にかかる液体燃料燃焼装置は、外筒及び内筒を有
する燃焼器と、外筒と内筒との間で液体燃料及び空気を
混合して気化する気化混合室と、気化混合室からの混合
気を燃焼器の外周部から噴出して外側火炎を形成する第
１火炎形成孔と、第１火炎形成孔の内側から混合気を噴
出して内側火炎を形成する第１火炎形成孔より大きな開
口面積の第２火炎形成孔と、第１火炎形成孔からの外側
火炎の炎電流に基づき混合気の不完全燃焼を検出する炎
電流検出器とから構成したものである。[Means for Solving the Problems] A liquid fuel combustion device according to the present invention includes a combustor having an outer cylinder and an inner cylinder, and a vaporizer that mixes and vaporizes liquid fuel and air between the outer cylinder and the inner cylinder. a mixing chamber, a first flame forming hole that injects the air-fuel mixture from the vaporization mixing chamber from the outer periphery of the combustor to form an outer flame, and an inner flame that injects the air-fuel mixture from the inside of the first flame forming hole. The second flame forming hole has a larger opening area than the first flame forming hole to be formed, and a flame current detector detects incomplete combustion of the air-fuel mixture based on the flame current of the outer flame from the first flame forming hole. It is something.
［作用］
本発明においては、第２火炎形成孔の開口面積が第１火
炎形成孔のそれよりも大きいため、外側火炎と内側火炎
との相互干渉か防止され、その結果、燃焼器の安定燃焼
範囲が拡大して、燃焼効率か向上するとともに、低濃度
の一酸化炭素を検出できて、炎電流検出器の不完全燃焼
検出能力が向上する。[Operation] In the present invention, since the opening area of the second flame forming hole is larger than that of the first flame forming hole, mutual interference between the outer flame and the inner flame is prevented, and as a result, stable combustion in the combustor is achieved. The range is expanded, combustion efficiency is improved, low concentrations of carbon monoxide can be detected, and the flame current detector's ability to detect incomplete combustion is improved.
［実施例］ 以下、本発明の詳細な説明する。[Example] The present invention will be explained in detail below.
第１図は本発明の一実施例による液体燃料燃焼装置の断
面図、第２図は第１図の一部破断乎面図、第４図は本発
明実施例の液体燃料燃焼装置の安定燃焼範囲を実線で示
す特性図、第５図は本発明実施例の液体燃料燃焼装置の
炎電流検出器の検出時性を実線で示す特性図である。な
お、図中、従来例と同−符号及び記号は従来例の構成部
分と同一または相当する部分を示すものであり、ここて
は重複する説明を省略する。FIG. 1 is a sectional view of a liquid fuel combustion device according to an embodiment of the present invention, FIG. 2 is a partially cutaway view of FIG. 1, and FIG. 4 is a stable combustion of a liquid fuel combustion device according to an embodiment of the present invention. FIG. 5 is a characteristic diagram in which the range is shown by a solid line, and FIG. 5 is a characteristic diagram in which the detection time of the flame current detector of the liquid fuel combustion apparatus according to the embodiment of the present invention is shown by a solid line. In the drawings, the same reference numerals and symbols as in the conventional example indicate the same or corresponding parts as those in the conventional example, and redundant explanation will be omitted here.
図において、（１）は本体ケーシング、（２）は燃焼室
、（２１）は前記本体ケーシング（１〉の底部に接続さ
れた空気供給管、（２２〉は本体ケーシング（１）内に
前記燃焼器（３）を収容支持する支持部材、（２３）は
前記二次外周空気通路〈１８〉に連通するように支持部
材（２２）に形成された二次外周空気口、（２４）は前
記二次中央空気通路（１７）に連通するように燃焼器（
３）の底部に形成された二次中央空気口、（２５）は二
次中央空気通路（１７）からの二次空気を旋回させる二
次中央空気旋回板、（２６）は−次空気供給口（２７〉
が形成された導気筒であり、その内側に前記燃利噴剣ノ
ズル（８）が挿通されている。In the figure, (1) is the main casing, (2) is the combustion chamber, (21) is the air supply pipe connected to the bottom of the main casing (1), and (22> is the combustion chamber inside the main casing (1). A support member that accommodates and supports the container (3), (23) a secondary outer circumferential air port formed in the support member (22) so as to communicate with the secondary outer circumferential air passage <18>, and (24) a Next, the combustor (
(25) is a secondary central air swirling plate that swirls the secondary air from the secondary central air passageway (17); (26) is a secondary air supply port formed at the bottom of 3); (27〉
The fuel injection nozzle (8) is inserted into the inside of the guide cylinder.
（２８）は前記隔壁板（１０）と前記第１バナプレート
（１２）との間に配設された均圧板であり、その全周に
は隔壁板（１０）の連通孔（１１）を通過した混合気の
圧力を平均化して第１バナブレ−１〜（１２）の混合気
通過口（１３）に導く多数個の調整孔（２９）が形成さ
れている。(28) is a pressure equalizing plate disposed between the partition wall plate (10) and the first banner plate (12), the entire circumference of which passes through the communication hole (11) of the partition plate (10). A large number of adjustment holes (29) are formed to average the pressure of the air-fuel mixture and guide it to the air-fuel mixture passage ports (13) of the first vanabres 1 to (12).
（３０〉は第１バーナプレーｉ〜（１２）と前記第２バ
ーナブレー１〜（１５）どの間に配設されたパンヂング
プレートである。(30> is a panning plate disposed between the first burner plates i to (12) and the second burner plates 1 to (15).
本実施例においては、第１バーナプレート（１２〉の第
１火炎形成孔（１４）の単位時間当りの炎孔負荷率（Ｋ
ｃａ ｌ ／ｍ′ｌ７ｉ） 、すなわち、燃焼量か、第
２バーナプレーｉ〜（１５）の第２火炎形成孔（３１）
、（３２）のそれよりも、例えば、４対６の割合で小さ
くなるように、第１火炎形成孔（１４）の開口面積の総
和が第２火炎形成孔（３１）、（３２）のそれよりも小
さく設定されている。なお、（３４）は前記燃焼器（３
）の上端に対応して本体ケーシング（１）の内面に固着
された先細筒状の火炎絞り部′４オである。In this example, the flame hole loading rate (K
cal /m'l7i), that is, the combustion amount or the second flame forming hole (31) of the second burner play i~(15)
, (32), such that the sum of the opening areas of the first flame forming holes (14) is smaller than that of the second flame forming holes (31) and (32), for example, by a ratio of 4:6. is set smaller than. Note that (34) is the combustor (3).
) is a tapered cylindrical flame throttle part '4o fixed to the inner surface of the main casing (1) corresponding to the upper end of the main body casing (1).
次に、上記のように構成された本実施例の液体燃料燃焼
装置の動作を説明する。Next, the operation of the liquid fuel combustion apparatus of this embodiment configured as described above will be explained.
気化混合室（９）で生成された混合気は隔壁板（１０）
の連通孔（’１１）、均圧板（２８）の調整孔（２９〉
及び第１バーナプレート（１２）の混合気通過口（１３
）を通り、第１バーナプレート（１２）の第１火炎形成
孔（１４）及び第２バナプレー１〜（１５）の第２火炎
形成孔（３１）。The air-fuel mixture generated in the vaporization mixing chamber (9) is transferred to the partition plate (10).
communication hole ('11), adjustment hole (29) of pressure equalizing plate (28)
and the air-fuel mixture passage port (13) of the first burner plate (12).
), the first flame forming hole (14) of the first burner plate (12) and the second flame forming hole (31) of the second burner plate 1-(15).
（３２）に導かれる。この場合、本実施例においては、
第１火炎形成孔（１４〉の開口面積の総和が第２火炎形
成孔（３１）、（３２）のそれよりも小さく設定されて
いるため、混合気は第１火炎形成孔（１４）よりも第２
火炎形成孔（３１）。(32) leads to this. In this case, in this example,
Since the total opening area of the first flame forming holes (14) is set smaller than that of the second flame forming holes (31) and (32), the air-fuel mixture is smaller than that of the first flame forming holes (14). Second
Flame forming hole (31).
（３２〉により多く供給される。したかつて、この状態
で混合気に点火すると、外側火炎（Ｆｌ）の長さか比較
的短くなるため、外側火炎（Ｆｌ）と内側火炎（Ｆ２〉
との相互干渉が防止される。(32>).If the air-fuel mixture is ignited in this state, the length of the outer flame (Fl) will be relatively short, so the outer flame (Fl) and the inner flame (F2>
Mutual interference with is prevented.
この燃焼状態においては、第４図に実線で示すように、
前記ＣＯ発生空気量下限ラインとＣＯ発生空気量上限ラ
インとの間の安定燃焼範囲か従来と比較して拡大される
ため、燃焼器（３）に設定される運転制御範囲か低燃焼
量及び低空気量の領域に移行して、燃焼器（３）の燃焼
効率が向上する。また、外側火炎（Ｆｌ）及び内側火炎
（「２）が相互干渉しない燃焼状態では、第５図に実線
で示すように、前記炎電流検出器（３７）が検出した炎
電流値は、燃焼用空気量の減少に伴ない急激に低下する
ため、燃焼器（３〉の設定空気量範囲にお【プる炎電流
値の変化量（Ｇ１）が従来と比較して大幅に増加する。In this combustion state, as shown by the solid line in Figure 4,
Since the stable combustion range between the CO generation air amount lower limit line and the CO generation air amount upper limit line is expanded compared to the conventional one, the operation control range set for the combustor (3) has a low combustion amount and a low Moving to the air amount region, the combustion efficiency of the combustor (3) improves. Furthermore, in a combustion state where the outer flame (Fl) and the inner flame (2) do not interfere with each other, the flame current value detected by the flame current detector (37) is As the amount of air decreases rapidly as the amount of air decreases, the amount of change (G1) in the flame current value within the set air amount range of the combustor (3) increases significantly compared to the conventional case.
したがって、燃焼器（３）の不完全燃焼を判断する一酸
化炭素淵度の検出レベル（第５図に一点鎖線で図示）を
低く設定して、不完全燃焼時に燃焼運転を早期に停止す
ることができる。Therefore, the detection level of carbon monoxide depth (indicated by the dashed line in Fig. 5), which determines incomplete combustion in the combustor (3), should be set low to stop the combustion operation early when incomplete combustion occurs. Can be done.
なあ、第２火炎形成孔（３１）、（３２）の燃焼量の拡
大に伴ない、内側火炎（Ｆ２〉への二次中央空気の供給
量を増加させる必要かあるか、本実施例によれば、燃焼
器（３）の内筒（５）に対する二次中央空気旋回板（２
５）の装着位置を比較的上方に設定するだりて、内側火
炎（Ｆ２）に十分な二次中央空気を供給することができ
る。By the way, depending on this embodiment, it is possible to determine whether it is necessary to increase the amount of secondary central air supplied to the inner flame (F2) as the combustion amount of the second flame forming holes (31) and (32) increases. For example, the secondary central air swirl plate (2) for the inner cylinder (5) of the combustor (3)
By setting the installation position of 5) relatively upward, sufficient secondary central air can be supplied to the inner flame (F2).
このにうに、上記実施例の液体燃料燃焼装置は、外筒（
４）及び内筒（５）を有する燃焼器（３）と、外筒（４
）と内筒（５）との間で液体燃料及び空気を混合して気
化する気化混合室（９）と、その気化混合室（９）から
の混合気を燃焼器（３）の外周部から噴出して外側火炎
（Ｆｌ）を形成ηる第１火炎形成孔（１４）と、その第
１火炎形成孔（１４）の内側から混合気を噴出して内側
火炎（Ｆ２）を形成する第１火炎形成孔（１４）より大
きな開口面積の第２火炎形成孔（３１）、（３２）と、
第１火炎形成孔（１４〉からの外側火炎（［１）の炎電
流に基づき混合気の不完全燃焼を検出する炎電流検出器
（３７）とから構成したものである。In addition, the liquid fuel combustion device of the above embodiment has an outer cylinder (
4) and an inner cylinder (5), and an outer cylinder (4).
) and the inner cylinder (5), and a vaporization mixing chamber (9) that mixes and vaporizes liquid fuel and air, and a gas mixture from the vaporization mixing chamber (9) from the outer periphery of the combustor (3). A first flame forming hole (14) that blows out to form an outer flame (Fl), and a first flame forming hole (14) that blows out the air-fuel mixture from inside the first flame forming hole (14) to form an inner flame (F2). second flame forming holes (31), (32) having a larger opening area than the flame forming hole (14);
The flame current detector (37) detects incomplete combustion of the air-fuel mixture based on the flame current of the outer flame ([1)] from the first flame forming hole (14).
したがって、上記実施例によれば、外側火炎（Ｆｌ）と
内側火炎（Ｆ２）との相互干渉が防止され、その結果、
燃焼器（３）の安定燃焼範囲が拡大されて、高い燃焼効
率が得られるとともに、−酸化炭素濃度の検出レベルを
低く設定して、炎電流検出器の不完全燃焼検出能力を向
上することかできる。Therefore, according to the above embodiment, mutual interference between the outer flame (Fl) and the inner flame (F2) is prevented, and as a result,
The stable combustion range of the combustor (3) is expanded to obtain high combustion efficiency, and - the detection level of carbon oxide concentration is set low to improve the incomplete combustion detection ability of the flame current detector. can.
なお、上記実施例の第２火炎形成孔（３１）。Note that the second flame forming hole (31) of the above embodiment.
（３２）は内外１列の多数の孔により構成されているが
、本発明を実施する場合はこれに限定されるものではな
く、開口面積の総和か第１火炎形成孔よりも大きい多数
のスリットを第２バーナプレート（１５）に形成するこ
とによって第２火炎形成孔を構成してもよい。(32) is composed of a large number of holes arranged in one row inside and outside, but when carrying out the present invention, the present invention is not limited to this, and a large number of slits whose total opening area is larger than the first flame forming hole The second flame forming hole may be formed by forming a hole in the second burner plate (15).
「発明の効果］
以上のように、本発明の液体燃料燃焼装置は、内側火炎
を形成する第２火炎形成孔の開口面積を外側火炎を形成
する第１火炎形成孔の開口面積よりも大きく設定すると
ともに、炎電流検出器で外側火炎の炎電流に基づき混合
気の不完全燃焼を検出するように構成したものであるか
ら、外側火炎と内側火炎との相互干渉を防止して、高い
燃焼効率が得られるとともに、炎電流検出器の不完全燃
焼検出能力を向上できるという効果が必る。"Effects of the Invention" As described above, in the liquid fuel combustion device of the present invention, the opening area of the second flame forming hole that forms the inner flame is set larger than the opening area of the first flame forming hole that forms the outer flame. In addition, since the flame current detector is configured to detect incomplete combustion of the air-fuel mixture based on the flame current of the outer flame, mutual interference between the outer flame and the inner flame is prevented, resulting in high combustion efficiency. This has the effect of improving the ability of the flame current detector to detect incomplete combustion.
第１図は本発明の一実施例による液体燃料燃焼装置の断
面図、第２図は第１図の一部破断乎面図、第３図は従来
の液体燃料燃焼装置を示す要部断面図、第４図は本発明
実施例及び従来例の液体燃料燃焼装置の安定燃焼範囲を
比較する特性図、第５図は本発明実施例及び従来例の炎
電流検出器の検出特性を比較する特性図である。
図において、
３：燃焼器 ４：外筒
５：内筒 ９：気化混合室１４：第１火
炎形成孔
３１．３２：第２火炎形成孔
３７：炎電流検出器
Ｆｌ ：外側火炎、 Ｆ２ ：内側火炎である。
なお、図中、同−符号及び同一記号は同一または相当部
分を示すもので必る。
代理人 弁理士 人吉 増血 外２名
硬震争FIG. 1 is a sectional view of a liquid fuel combustion device according to an embodiment of the present invention, FIG. 2 is a partially cutaway view of FIG. 1, and FIG. 3 is a sectional view of essential parts of a conventional liquid fuel combustion device. , FIG. 4 is a characteristic diagram comparing the stable combustion ranges of the liquid fuel combustion apparatus of the embodiment of the present invention and the conventional example, and FIG. 5 is a characteristic diagram comparing the detection characteristics of the flame current detector of the embodiment of the present invention and the conventional example. It is a diagram. In the figure, 3: Combustor 4: Outer cylinder 5: Inner cylinder 9: Vaporization mixing chamber 14: First flame forming hole 31.32: Second flame forming hole 37: Flame current detector Fl: Outside flame, F2: Inside It's a flame. In addition, in the figures, the same reference numerals and the same symbols necessarily indicate the same or equivalent parts. Agent: Patent attorney Hitoyoshi Masuketsu and two others
Claims (1)
化する気化混合室と、 前記気化混合室からの混合気を燃焼器の外周部から噴出
して外側火炎を形成する第１火炎形成孔と、 前記第１火炎形成孔の内側から前記混合気を噴出して内
側火炎を形成する第１火炎形成孔より大きな開口面積の
第２火炎形成孔と、 前記第１火炎形成孔からの外側火炎の炎電流に基づき混
合気の不完全燃焼を検出する炎電流検出器と を具備することを特徴とする液体燃料燃焼装置。(1) A combustor having an outer cylinder and an inner cylinder, a vaporization mixing chamber that mixes and vaporizes liquid fuel and air between the outer cylinder and the inner cylinder, and a combustor that transfers the air-fuel mixture from the vaporization mixing chamber to the combustor. a first flame forming hole that blows out from the outer periphery of the hole to form an outer flame; and a first flame forming hole that has a larger opening area than the first flame forming hole that blows out the air-fuel mixture from the inside of the first flame forming hole to form an inner flame. A liquid fuel combustion device comprising: a second flame forming hole; and a flame current detector that detects incomplete combustion of the air-fuel mixture based on the flame current of the outer flame from the first flame forming hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220052A JPH071088B2 (en) | 1988-09-02 | 1988-09-02 | Liquid fuel combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220052A JPH071088B2 (en) | 1988-09-02 | 1988-09-02 | Liquid fuel combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0268421A true JPH0268421A (en) | 1990-03-07 |
| JPH071088B2 JPH071088B2 (en) | 1995-01-11 |
Family
ID=16745173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63220052A Expired - Lifetime JPH071088B2 (en) | 1988-09-02 | 1988-09-02 | Liquid fuel combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071088B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0526416A (en) * | 1991-07-17 | 1993-02-02 | Mitsubishi Electric Corp | Liquid fuel combustion device |
-
1988
- 1988-09-02 JP JP63220052A patent/JPH071088B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0526416A (en) * | 1991-07-17 | 1993-02-02 | Mitsubishi Electric Corp | Liquid fuel combustion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH071088B2 (en) | 1995-01-11 |
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