JPH0742913A - Combustion device - Google Patents

Combustion device

Info

Publication number
JPH0742913A
JPH0742913A JP18937393A JP18937393A JPH0742913A JP H0742913 A JPH0742913 A JP H0742913A JP 18937393 A JP18937393 A JP 18937393A JP 18937393 A JP18937393 A JP 18937393A JP H0742913 A JPH0742913 A JP H0742913A
Authority
JP
Japan
Prior art keywords
gas
rich
flame
lean
combustion
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
Application number
JP18937393A
Other languages
Japanese (ja)
Other versions
JP2630205B2 (en
Inventor
Satoshi Nakai
諭 仲井
Masahiko Shimazu
政彦 嶋津
Hideo Ueda
英雄 植田
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.)
Noritz Corp
Original Assignee
Noritz Corp
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 Noritz Corp filed Critical Noritz Corp
Priority to JP5189373A priority Critical patent/JP2630205B2/en
Publication of JPH0742913A publication Critical patent/JPH0742913A/en
Application granted granted Critical
Publication of JP2630205B2 publication Critical patent/JP2630205B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Gas Burners (AREA)

Abstract

PURPOSE:To cause lean flames at both ends to be changed into rich flames, prevent the flames from being lifted even if the rich flames are not present at both sides by a method wherein an amount off supplying gas is increased to be discharged at lean gas injection holes located at both ends of a combustion pipe in a longitudinal direction. CONSTITUTION:In the case that a combustion occurs at a combustion device, rich gas within a rich gas chamber 2 is injected from rich side flame holes 3, ignited and then forms rich flames. After the gas is injected from each of lean gas injections holes 9 and 10 into a lean gas mixing chamber 4, the gas is mixed with air fed from an air opening 5 so as to form lean gas and then lean flame is generated above lean flame holes 7. In this case, the combustion is made stable under an effect of holding flame at the rich side flame, although both ends of the combustion pipe 1 in its longitudinal direction have no rich flame holes 3, resulting in that an effect of holding flames can not be expected. However, since a rich gas supplying amount for supplying gas at the lean gas injections holes 10 at both ends is increased, the lean gas injected from the lean flame holes 7 at this part shows a low air excessive rate, resulting in that the rich flames are generated at both ends of the lean flame.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、低ＮＯｘ化と共に燃焼
の安定化を計った燃焼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 combustion device which achieves low NOx and stable combustion.

【０００２】[0002]

【従来の技術】従来の燃焼方式において、燃焼火炎に局
所的に高温部が発生してＮＯｘが生成される問題を解決
するため、その対策の一つとして濃淡燃焼方式があり、
局所的高温部の発生をなくしてＮＯｘの低減に有効なも
のである。2. Description of the Related Art In order to solve the problem that a high temperature part is locally generated in a combustion flame and NOx is generated in a conventional combustion system, one of the countermeasures is a rich and lean combustion system.
This is effective in reducing NOx by eliminating the generation of local high temperature parts.

【０００３】この濃淡燃焼方式を適用した燃焼装置とし
て、板金製の燃焼管を複数本並設して構成したものがあ
り、構造が簡単で安価に構成でき、低ＮＯｘ燃焼装置と
して有利なものである。[0003] As a combustion apparatus to which this dark and light combustion system is applied, there is a combustion apparatus which is constructed by arranging a plurality of sheet metal combustion tubes side by side. The structure is simple and inexpensive, and it is advantageous as a low NOx combustion apparatus. is there.

【０００４】この燃焼装置として、例えば図３および図
４に示すように、燃焼管１１の両側部に濃ガス室１２を
形成して上面に濃側炎孔１３を設け、中央部に上部を開
口した淡側混合室１４を形成し、上面に仕切板１５を並
設して淡側炎口１６を設け、淡側混合室１４を空気口１
７と連通し、濃ガス室１２に空気過剰率の低い濃ガスを
供給するようにすると共に、濃ガス室１２と淡側混合室
１４とを淡側用ガス噴出孔１８により連通して淡側混合
室１４に濃ガスを供給し、空気口１７からの空気と混合
して淡側混合室１４において空気過剰率の高い淡ガスを
生成し、中央部に淡側火炎、両側部に濃側火炎を形成す
るようにしたものがある。このような燃焼装置は、中央
部の淡側火炎を両側部の濃側火炎の保炎効果により、燃
焼を安定化することができる。As shown in, for example, FIGS. 3 and 4, this combustion apparatus has a rich gas chamber 12 formed on both sides of a combustion tube 11, a dense flame hole 13 provided on the upper surface, and an upper portion opened at the central portion. The light-side mixing chamber 14 is formed, the partition plate 15 is arranged in parallel on the upper surface, and the light-side flame port 16 is provided.
7, the concentrated gas having a low excess air ratio is supplied to the concentrated gas chamber 12, and the concentrated gas chamber 12 and the light side mixing chamber 14 are communicated with each other through the light gas ejection holes 18 for the light side. A rich gas is supplied to the mixing chamber 14 and mixed with air from the air port 17 to generate a fresh gas having a high excess air ratio in the light mixing chamber 14, and a light flame is formed in the center and rich flames are formed in both sides. There is one that is formed. Such a combustion device can stabilize the combustion of the light flame at the center by the flame holding effect of the rich flame at both sides.

【０００５】[0005]

【発明が解決しようとする課題】ところが、前述の燃焼
管１１において、その長手方向両端部Ａには燃焼管１１
の構成上濃側炎孔を設けることが困難であるため、両端
部Ａの淡側火炎がリフトし易いという問題を有してい
た。However, in the above-mentioned combustion pipe 11, the combustion pipe 11 is provided at both ends A in the longitudinal direction.
Since it is difficult to provide the dark side flame holes due to the above-mentioned constitution, there is a problem that the light side flame at both ends A is likely to lift.

【０００６】本発明は、上記問題点を解決し、燃焼管の
長手方向両端部の淡側火炎のリフトを防止し、燃焼を安
定化する燃焼装置の提供を目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a combustion apparatus which prevents lift of the light flame at both ends of the combustion tube in the longitudinal direction and stabilizes combustion.

【０００７】[0007]

【課題を解決するための手段】本発明の燃焼装置は、上
記目的を達成するために、両側部に濃ガス室を形成し、
上面に濃側炎孔を設けると共に、中央部に空気口と連通
した淡側混合室を形成し、上部を開口して上面に淡側炎
口を設け、濃ガス室と淡側混合室との間を複数の淡側用
ガス噴出孔により連通した燃焼管において、該燃焼管の
長手方向両端部に位置する淡側用ガス噴出孔のガス供給
量を増大するようにしたことを特徴としている。In order to achieve the above-mentioned object, the combustion apparatus of the present invention has a rich gas chamber formed on both sides,
A dark side flame hole is provided on the upper surface, and a light side mixing chamber communicating with the air port is formed in the center part.The upper side is opened and a light side flame port is provided on the upper surface. In the combustion pipe in which the spaces are communicated with each other by a plurality of light emission holes for the light side, the gas supply amount of the light emission holes for the light side located at both ends in the longitudinal direction of the combustion pipe is increased.

【０００８】[0008]

【作用】燃焼時、濃ガス室上面の濃側炎孔に濃側火炎を
形成し、混合室上面の淡側炎口に淡側火炎を形成する。
このとき、燃焼管の長手方向両端部の淡側火炎は、この
両端部に位置する淡側用ガス噴出孔からのガス供給量を
増大しているため、この部分の淡側炎口から噴出する淡
ガスは空気過剰率が低くなり、安定した淡側火炎が形成
されることになって、両側部に濃側火炎が形成されてい
なくてもリフトのない安定した燃焼を得ることができ
る。During combustion, a rich flame is formed in the rich flame hole on the upper surface of the rich gas chamber, and a light flame is formed at the light flame port on the upper surface of the mixing chamber.
At this time, the light flames at both ends of the combustion tube in the longitudinal direction are ejected from the light flame ports of this portion because the amount of gas supplied from the light gas ejection holes for the light side is increased. The light gas has a low excess air ratio and a stable light side flame is formed, so that stable combustion without lift can be obtained even if the rich side flame is not formed on both sides.

【０００９】[0009]

【実施例】図１は本発明の一実施例を示す要部断面斜視
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of an essential part of a cross section of an embodiment of the present invention.

【００１０】１は燃焼管で、両側部に濃ガス室２を形成
し、上面に濃側炎孔３を設けると共に、中央部に淡側混
合室４を形成し、淡側混合室４は下部に設けた空気口５
と連通し、上部を開口して上面に並設した仕切板６によ
り淡側炎口７を形成している。８は濃ガス室２に連通す
る濃側混合室で、燃料ガスと１次空気とを混合し、空気
過剰率の低い濃ガスを生成する。９は濃ガス室２と淡側
混合室４とを連通する淡側用ガス噴出孔で、濃ガスを淡
側混合室４内に噴出し、空気口５から導入される空気と
混合して空気過剰率の高い淡ガスを生成する。この淡側
用ガス噴出孔９は、燃焼管１の長手方向全長に亘って一
定間隔で複数個設けてあり、燃焼管１の長手方向両端部
に位置する淡側用ガス噴出孔１０はその穴径を大きくし
て濃ガス供給量を増大している。Reference numeral 1 denotes a combustion tube, which forms a rich gas chamber 2 on both sides, a dense flame hole 3 on the upper surface, and a light side mixing chamber 4 at the center, and the light side mixing chamber 4 is at the bottom. Air port 5 provided in
A light side flame port 7 is formed by a partition plate 6 which is communicated with the above and has an upper part opened and arranged in parallel on the upper surface. Reference numeral 8 is a rich-side mixing chamber that communicates with the rich-gas chamber 2, and mixes the fuel gas and the primary air to produce a rich gas having a low excess air ratio. Reference numeral 9 denotes a gas injection hole for the light side, which connects the rich gas chamber 2 and the light mixing chamber 4 to each other. The rich gas is jetted into the light mixing chamber 4 and mixed with air introduced from the air port 5 to form air. It produces a high excess of fresh gas. A plurality of the light gas injection holes 9 for the light side are provided at regular intervals along the entire length in the longitudinal direction of the combustion tube 1, and the gas injection holes 10 for the light side located at both ends in the longitudinal direction of the combustion tube 1 are the holes. The diameter is increased to increase the rich gas supply.

【００１１】尚、燃焼管１の長手方向両端部の淡側用ガ
ス供給量を増大する手段として前述のように淡側用ガス
噴出孔１０の穴径を大きくする以外に、図２に示すよう
に穴径は同一でも両端部の淡側用ガス噴出孔１０の間隔
ｙを他の淡側用ガス噴出孔９の間隔ｘより小さくして実
質的に両端部分のガス噴出量を大きくしてもよく、要す
るに両端部の濃ガス供給量を増大するようにすればよ
い。As a means for increasing the supply amount of the light side gas at both longitudinal ends of the combustion pipe 1, as shown in FIG. 2, in addition to increasing the hole diameter of the light side gas injection hole 10 as described above. Even if the hole diameters are the same, even if the distance y between the gas injection holes 10 for the light side at both ends is made smaller than the distance x between the gas injection holes 9 for the other light side, the gas injection amount at both ends is substantially increased. Well, in short, it suffices to increase the rich gas supply amount at both ends.

【００１２】このように構成した燃焼装置は、燃焼時、
濃ガス室２内の濃ガスが濃側炎孔３から噴出燃焼して濃
側火炎を形成すると共に、淡側用ガス噴出孔９、１０か
ら淡側混合室４内に噴出し、空気口５からの空気と混合
して淡ガスを生成し、淡側炎口７上面に淡側火炎を形成
する。淡側火炎は濃側火炎の保炎効果により、燃焼を安
定化するが、燃焼管１の長手方向両端部は濃側炎孔３が
なく、その保炎効果を期待できない。しかし両端部の淡
側用ガス噴出孔１０よりの濃ガス供給量を増大している
ため、この部分の淡側炎口７から噴出する淡ガスは空気
過剰率が低くなり、淡側火炎の両端部に濃い火炎か形成
されることになり、安定した燃焼を得ることができ、リ
フトによる未燃ガスの排出も抑制される。The combustion apparatus having the above-mentioned structure
The rich gas in the rich gas chamber 2 ejects and burns from the rich flame hole 3 to form a rich flame, and at the same time, it ejects from the light gas ejecting holes 9 and 10 into the light mixing chamber 4 and the air port 5 It mixes with the air from and produces a light gas, and forms a light flame on the upper surface of the light flame opening 7. The light flame stabilizes the combustion due to the flame holding effect of the rich flame, but there is no rich flame hole 3 at both longitudinal ends of the combustion tube 1, and the flame holding effect cannot be expected. However, since the rich gas supply amount from the light side gas ejection holes 10 at both ends is increased, the excess air ratio of the light gas ejected from the light side flame port 7 at this portion becomes low, and both ends of the light side flame are reduced. A dense flame is formed in the portion, stable combustion can be obtained, and the discharge of unburned gas due to the lift is also suppressed.

【００１３】[0013]

【発明の効果】本発明は以上のように、燃焼管の長手方
向両端部に位置する淡側用ガス噴出孔からのガス供給量
を増大するようにしたので、両端部の淡側火炎は濃い火
炎となり、両側に濃側火炎がなくてもリフトせず、安定
した燃焼を得ることができる。As described above, according to the present invention, the amount of gas supplied from the gas injection holes for the light side located at both ends of the combustion tube in the longitudinal direction is increased, so that the light flame at both ends is rich. It becomes a flame and does not lift even if there is no rich flame on both sides, and stable combustion can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の一実施例を示す要部断面斜視図であ
る。FIG. 1 is a cross-sectional perspective view of an essential part showing an embodiment of the present invention.

【図２】淡側用ガス噴出孔の間隔を小さくした他の実施
例を示す要部断面斜視図である。FIG. 2 is a cross-sectional perspective view of essential parts showing another embodiment in which the distance between the gas injection holes for the light side is reduced.

【図３】従来例を示す要部断面斜視図である。FIG. 3 is a cross-sectional perspective view of a main part showing a conventional example.

【図４】同例の要部平面図である。FIG. 4 is a plan view of a main part of the same example.

【符号の説明】[Explanation of symbols]

１ 燃焼管 ２ 濃ガス室 ３ 濃側炎孔 ４ 淡側混合室 ７ 淡側炎口 ９ 淡側用ガス噴出孔 １０ 淡側用ガス噴出孔 1 Combustion Pipe 2 Thick Gas Chamber 3 Thick Side Flame Hole 4 Light Side Mixing Chamber 7 Light Side Flame Mouth 9 Light Side Gas Jet Hole 10 Light Side Gas Jet Hole

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 両側部に濃ガス室を形成し、上面に濃側
炎孔を設けると共に、中央部に空気口と連通した淡側混
合室を形成し、上部を開口して上面に淡側炎口を設け、
濃ガス室と淡側混合室との間を複数の淡側用ガス噴出孔
により連通した燃焼管において、該燃焼管の長手方向両
端部に位置する淡側用ガス噴出孔のガス供給量を増大す
るようにしたことを特徴とする燃焼装置。1. A rich gas chamber is formed on both sides, a dark side flame hole is provided on the upper surface, and a light side mixing chamber communicating with an air port is formed on the center part, and an upper part is opened to form a light side on the upper surface. With a flame outlet,
In a combustion pipe in which the rich gas chamber and the light-side mixing chamber are communicated with each other by a plurality of light-side gas ejection holes, the gas supply amount of the light-side gas ejection holes located at both longitudinal ends of the combustion pipe is increased. Combustion device characterized in that
JP5189373A 1993-06-30 1993-06-30 Combustion equipment Expired - Fee Related JP2630205B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5189373A JP2630205B2 (en) 1993-06-30 1993-06-30 Combustion equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5189373A JP2630205B2 (en) 1993-06-30 1993-06-30 Combustion equipment

Publications (2)

Publication Number Publication Date
JPH0742913A true JPH0742913A (en) 1995-02-10
JP2630205B2 JP2630205B2 (en) 1997-07-16

Family

ID=16240237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5189373A Expired - Fee Related JP2630205B2 (en) 1993-06-30 1993-06-30 Combustion equipment

Country Status (1)

Country Link
JP (1) JP2630205B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010133646A (en) * 2008-12-04 2010-06-17 Espec Corp Ventilation device
KR101468940B1 (en) * 2013-11-15 2014-12-04 주식회사 경동나비엔 Lean rich combustion apparatus
US9115889B2 (en) 2011-12-09 2015-08-25 Noritz Corporation Rich-lean combustion burner and combustion apparatus
US9228742B2 (en) 2011-12-28 2016-01-05 Noritz Corporation Rich-lean combustion burner and combustion apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388511A (en) * 1977-01-13 1978-08-04 Sony Corp Tuner
JPH04124512A (en) * 1990-09-14 1992-04-24 Matsushita Electric Ind Co Ltd Low nox burner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5388511A (en) * 1977-01-13 1978-08-04 Sony Corp Tuner
JPH04124512A (en) * 1990-09-14 1992-04-24 Matsushita Electric Ind Co Ltd Low nox burner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010133646A (en) * 2008-12-04 2010-06-17 Espec Corp Ventilation device
JP4727712B2 (en) * 2008-12-04 2011-07-20 エスペック株式会社 Ventilation device
US9115889B2 (en) 2011-12-09 2015-08-25 Noritz Corporation Rich-lean combustion burner and combustion apparatus
US9228742B2 (en) 2011-12-28 2016-01-05 Noritz Corporation Rich-lean combustion burner and combustion apparatus
KR101468940B1 (en) * 2013-11-15 2014-12-04 주식회사 경동나비엔 Lean rich combustion apparatus
WO2015072759A1 (en) * 2013-11-15 2015-05-21 주식회사 경동나비엔 Rich-lean combustion apparatus
RU2628249C1 (en) * 2013-11-15 2017-08-15 Киунгдонг Навиен Ко., Лтд. Device for fuel combustion in the enriched and depleted zones
US9803856B2 (en) 2013-11-15 2017-10-31 Kyungdong Navien Co., Ltd. Rich-lean combustion apparatus

Also Published As

Publication number Publication date
JP2630205B2 (en) 1997-07-16

Similar Documents

Publication Publication Date Title
JPH0742913A (en) Combustion device
JP2564854B2 (en) Spark assist diesel engine
JP3310922B2 (en) Fuel nozzle
JP3687092B2 (en) Swirl combustor
KR20190005718A (en) Regenerative combustion equipment
JPH06101821A (en) Combustion device
JPH07151316A (en) Combustion device
JPH07151318A (en) Combustion device
JPH06313519A (en) Combustion device
JPH0742915A (en) Combustion device
JPH0861609A (en) Marine liquid fuel burner
JP3109354B2 (en) Combustion equipment
JP3324845B2 (en) Concentration combustion device
JPH06249416A (en) Combustion equipment
JPH06101822A (en) Combustion device
JP3229481B2 (en) Concentration combustion device
JPH07103421A (en) Combustion device
JPH06117609A (en) Thick and thin fuel combustion apparatus
JPS5823054Y2 (en) Two-stage combustion burner for reducing nitrogen oxides
JPH0719419A (en) Burner
JPH05231619A (en) Rich and lean combustion device
JPH0719424A (en) Burner
JPH0771723A (en) Combustion device
JPH09222208A (en) Burner
JP2007057162A (en) Cylindrical inner surface flame hole burner

Legal Events

Date Code Title Description
FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080418

Year of fee payment: 11

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090418

Year of fee payment: 12

LAPS Cancellation because of no payment of annual fees