JPH0561523B2 - - Google Patents
Info
- Publication number
- JPH0561523B2 JPH0561523B2 JP61313089A JP31308986A JPH0561523B2 JP H0561523 B2 JPH0561523 B2 JP H0561523B2 JP 61313089 A JP61313089 A JP 61313089A JP 31308986 A JP31308986 A JP 31308986A JP H0561523 B2 JPH0561523 B2 JP H0561523B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- flame
- air
- secondary air
- face plate
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 115
- 239000007789 gas Substances 0.000 claims description 24
- 238000009841 combustion method Methods 0.000 claims description 19
- 239000002737 fuel gas Substances 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- 238000013021 overheating Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Gas Burners (AREA)
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
この発明は、燃焼の際に、一酸化炭素（以下
COと称す）及び凝結液体（以下ドレンと称す）
の発生を抑制しながら高負荷燃焼を行なう全一次
予混合燃焼方法及びその装置に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention provides carbon monoxide (hereinafter referred to as carbon monoxide) during combustion.
CO) and condensed liquid (hereinafter referred to as drain)
The present invention relates to an all-primary premix combustion method and apparatus for performing high-load combustion while suppressing the occurrence of.
（従来の技術）
従来、家庭用給湯器において使用されていた燃
焼装置の燃焼方式は、いわゆる、ブンゼン燃焼方
式と全一次予混合方式との二つの方式のどちらか
が採用されている。(Prior Art) Conventionally, combustion devices used in household water heaters employ one of two combustion methods, the so-called Bunsen combustion method and the all-primary premixing method.
ブンゼン燃焼方式は、燃焼に必要な空気の量の
一部、実際には約半分程度の量の空気を燃料ガス
の供給時に取り入れ、残りの半分の量の空気を燃
焼時に炎口の近傍において供給するようにしたも
のである。 The Bunsen combustion method takes in a portion of the amount of air required for combustion, in fact about half of it, when supplying fuel gas, and supplies the remaining half of the amount of air near the flame port during combustion. It was designed to do so.
一方、全一次予混合燃焼方式は、燃料供給時
に、燃焼に必要な全ての量の空気を予め送風機に
より強制的に取り入れて混合し、その混合ガスを
炎口にて燃焼させるものである。 On the other hand, in the all-primary premix combustion method, when fuel is supplied, all the amount of air required for combustion is forcibly taken in and mixed by a blower in advance, and the mixed gas is combusted at a flame port.
（発明が解決しようとする問題点）
（従来の技術とその問題点）
ところが、ブンゼン燃焼方式の場合、自然拡散
を利用するから、空気比を一様にすることが困難
である。そのため、外炎の形成が二次空気中の酸
素の拡散によつて支配されるから、空気比が一様
でなく火炎が安定せず短炎を得ることが難しい。(Problems to be solved by the invention) (Prior art and its problems) However, in the case of the Bunsen combustion method, it is difficult to make the air ratio uniform because natural diffusion is used. Therefore, since the formation of the external flame is controlled by the diffusion of oxygen in the secondary air, the air ratio is not uniform, the flame is unstable, and it is difficult to obtain a short flame.
一方、燃焼の際、完全な酸化反応（燃焼）の後
熱交換を行なわないと、排ガス中にCOが残留し、
公害或いは中毒の危険が存する。そこで、バーナ
の上に十分に広い燃焼空間を形成し、その中で多
量の空気と燃料ガスとを十分に混合して酸化反応
を行なわせる方法がとられてきた。その結果、従
来のブンゼン燃焼方式の瞬間ガス湯沸器の場合に
はその体積の1/2は燃焼室の空間となり、小型化
を図る上での最大の問題点となつている。 On the other hand, during combustion, if heat exchange is not performed after the complete oxidation reaction (combustion), CO will remain in the exhaust gas.
There is a risk of pollution or poisoning. Therefore, a method has been adopted in which a sufficiently large combustion space is formed above the burner, and a large amount of air and fuel gas are sufficiently mixed therein to carry out the oxidation reaction. As a result, in the case of a conventional instantaneous gas water heater using the Bunsen combustion method, half of the volume is taken up by the combustion chamber, which is the biggest problem when trying to downsize the water heater.
これに対し、全一次予混合燃焼方式は、ブンゼ
ン燃焼方式の如き制約は受けないので高負荷燃焼
に適した燃焼方式である。ところが、高負荷燃焼
を給湯器に応用する場合、バーナー面積（熱交換
器入口面積）当りの燃焼量を大きくして、バーナ
ー面積、つまり熱交換器入口断面積を減少させる
事が多く、この様な場合には、燃焼ガスの流速が
通常燃焼の場合より大きくなる。 On the other hand, the all-primary premix combustion method is a combustion method suitable for high-load combustion because it is not subject to the restrictions of the Bunsen combustion method. However, when applying high-load combustion to water heaters, the amount of combustion per burner area (heat exchanger inlet area) is often increased and the burner area, that is, the cross-sectional area of the heat exchanger inlet, is reduced. In this case, the flow velocity of the combustion gas becomes higher than in the case of normal combustion.
従つて、ブンゼン燃焼方式の場合のような大き
な空気比を与えると、更にガス流速が増加し、火
炎のリトフ現象を呈し安定した燃焼を保持できな
くなるため、空気比を増加できないこととなる。
そのため、燃焼によつて生成される水による絶対
湿度がブンゼン燃焼方式に対して大きく、燃焼ガ
スの熱交換器の温度を高く設定しないとドレンの
付きやすい状態となり、それを行なえば熱交換に
よつて得られる湯の出湯温度の下限が高い器具と
なつてしまう。 Therefore, if a large air ratio is given as in the case of the Bunsen combustion method, the gas flow velocity will further increase, causing a flame litho phenomenon and making it impossible to maintain stable combustion, making it impossible to increase the air ratio.
Therefore, the absolute humidity due to the water produced by combustion is higher than that of the Bunsen combustion method, and unless the temperature of the combustion gas heat exchanger is set high, condensation tends to occur. As a result, the lower limit of the hot water output temperature is high.
一方、断熱火炎温度におけるCOの平衡濃度は、
空気比の関数として表されるものであり、前記の
様な状態で空気比を増すことができなければCO
濃度が下げられないという事になつてしまうので
大きな問題となつてしまう。 On the other hand, the equilibrium concentration of CO at adiabatic flame temperature is
It is expressed as a function of the air ratio, and if the air ratio cannot be increased under the conditions described above, CO
This becomes a big problem because the concentration cannot be lowered.
＜技術的課題＞
そこで、この発明は上述した問題点等に鑑み、
燃焼の際に、燃焼室の過熱を防止して、CO及び
ドレンの発生を抑制しながら高負荷燃焼を行なえ
るようにし、しかも、それを簡単な構造のもので
行なうようにすることを課題として創出されたも
のである。<Technical Problems> Therefore, in view of the above-mentioned problems, this invention
The goal is to prevent overheating of the combustion chamber during combustion, to suppress the generation of CO and condensate, and to perform high-load combustion, and to do so with a simple structure. It was created.
［発明の構成］
（問題点を解決するための手段）
この発明は、燃料ガス供給時に、燃焼に必要な
量以上の空気を予め混合させて燃焼させる全一次
予混合方式の燃焼方法において、略長方形状の炎
口面板からの燃焼火災の先端或いはその近傍に、
燃焼室の長手方向側壁に炎口面板の略長手方向全
体の長さで接するように配した空気噴出管より全
ての燃焼火炎全体にわたつて二次空気を噴出させ
ると共に、噴出すべく空気噴出管内を通過する二
次空気によつて燃焼室の長手方向側壁及びその近
傍を冷却する全一次予混合燃焼方法により、又、
燃料ガス供給時に、送風機により、燃焼に必要な
量以上の空気を予め吸入して混合させながら炎口
へ送り、その混合ガスを炎口にて燃焼させる全一
次予混合方式の燃焼装置において、炎口を形成す
る炎口面板を略長方形状に形成し、空気噴出管を
燃焼室の長手方向側壁に炎口面板の略長手方向全
体の長さで接するように配し、この空気噴出管に
は、炎口にて燃焼させることで得られた火炎の先
端、或いはその近傍へ、全ての燃焼火炎全体にわ
たつて二次空気を噴出させるべく二次空気噴出孔
を空気噴出管の炎口面板に面する側全体にわたつ
て適数個設けた全一次予混合燃焼装置により上述
した問題点を解決するものである。[Structure of the Invention] (Means for Solving the Problems) The present invention provides a combustion method using an all-primary premixing method in which air in an amount greater than that required for combustion is premixed and combusted when fuel gas is supplied. At or near the tip of a combustion fire from a rectangular flame face plate,
Secondary air is ejected over all the combustion flames from an air ejection pipe arranged so as to be in contact with the longitudinal side wall of the combustion chamber along approximately the entire length of the flame face plate in the longitudinal direction. By an all-primary premix combustion method in which the longitudinal side wall of the combustion chamber and its vicinity are cooled by secondary air passing through the combustion chamber,
When fuel gas is supplied, a blower sucks in more air in advance than the amount required for combustion, mixes it and sends it to the flame nozzle, and the mixed gas is combusted at the flame nozzle. The flame outlet face plate that forms the mouth is formed into a substantially rectangular shape, and the air jet pipe is arranged so as to be in contact with the longitudinal side wall of the combustion chamber along approximately the entire length of the flame mouth face plate in the longitudinal direction. In order to blow out secondary air over all the combustion flames to the tip of the flame obtained by combustion at the flame mouth or in the vicinity thereof, a secondary air jet hole is installed in the fire mouth face plate of the air jet tube. The above-mentioned problems are solved by providing an appropriate number of all primary premix combustion devices over the entire facing side.
（作用）
この発明に係る全一次予混合燃焼方法及びその
装置によれば、全一次予混合方式の燃焼にあつ
て、空気比を低くして火炎のリフト現象を抑える
程度のガス流速にした状態の火炎において、発生
したCOを、火炎の先端或いはその近傍へ二次空
気噴出孔から二次空気を噴出させることで火炎よ
りも下流で更に酸化して二酸化炭素にする。又、
火炎帯においては、前述のように二次空気を噴出
させて火炎には何等影響を与えないで空気比を増
加させ、CO平衡濃度の割合を少なくする。更に
は、燃焼室内に二次空気を送込むことで燃焼で生
成された水に対する空気の量を多くして絶対湿度
を低くするものである。そして、その二次空気を
略長方形状の炎口面板からの燃焼火炎の先端或い
はその近傍に、燃焼室の長手方向側壁に炎口面板
の略長手方向全体の長さで配した空気噴出管より
全ての燃焼火炎全体にわたつて二次空気を噴出さ
せることで、その作用を全ての炎全体にわたつて
行わしめる。その時に、空気噴出管を燃焼室の長
手方向側壁に炎口面板の略長手方向全体の長さで
接触するように配し、燃焼室の長手方向の側壁及
びその近傍を冷却する。(Function) According to the all-primary premix combustion method and its device according to the present invention, in the all-primary premix combustion method, the air ratio is lowered to a gas flow velocity that suppresses the flame lift phenomenon. In the flame, the generated CO is further oxidized into carbon dioxide downstream of the flame by blowing out secondary air from the secondary air outlet at or near the tip of the flame. or,
In the flame zone, as described above, secondary air is blown out to increase the air ratio without affecting the flame in any way, thereby reducing the proportion of the CO equilibrium concentration. Furthermore, by sending secondary air into the combustion chamber, the amount of air relative to the water produced by combustion is increased, thereby lowering the absolute humidity. The secondary air is then delivered to the tip of the combustion flame from the approximately rectangular burner face plate or in the vicinity thereof through an air jet pipe arranged on the longitudinal side wall of the combustion chamber along approximately the entire length of the burner face plate in the longitudinal direction. By blowing out secondary air over all the combustion flames, the effect is performed over all the flames. At this time, the air jet pipe is disposed so as to be in contact with the longitudinal side wall of the combustion chamber over substantially the entire longitudinal length of the flame port face plate, thereby cooling the longitudinal side wall of the combustion chamber and its vicinity.
（実施例）
以下、図面を参照しながらこの発明の実施例を
説明すると次の通りである。(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.
すなわち、第１図及び第２図に示す符号Ａは全
一次予混合方式の家庭用給湯装置であり、遠心送
風機２と、この遠心送風機２の送風出口５から送
出された空気と燃料ガスとの混合ガスを更に攪
拌、分散、均圧させる適数枚の分散均圧板６にて
なる均圧部７と、均圧部７からの混合ガスを燃焼
させる略長方形状の燃焼用炎口面板８とからなる
全一次予混合燃焼装置１、及びこの全一次予混合
燃焼装置１の燃焼用炎口面板８に対峙して配され
た熱交換器９にてなる。 That is, the reference numeral A shown in FIGS. 1 and 2 is an all-primary premixing type domestic water heater, in which a centrifugal blower 2 and air and fuel gas sent out from an air outlet 5 of the centrifugal blower 2 are connected. A pressure equalization section 7 consisting of an appropriate number of dispersion and pressure equalization plates 6 for further stirring, dispersion, and pressure equalization of the mixed gas, and a substantially rectangular combustion flame face plate 8 for combusting the mixed gas from the pressure equalization section 7. 1, and a heat exchanger 9 disposed opposite to the combustion flame face plate 8 of the all-primary premix combustion device 1.
又、この家庭用給湯装置Ａは、空気取入部３及
び排気口（図示せず）以外はケース１０によつて
密閉され、空気取入部３にはガス供給ノズル４が
配され、燃焼に必要な空気をガス供給時にすべて
取入れるように形成されている。 In addition, this household water heater A is sealed by a case 10 except for the air intake part 3 and the exhaust port (not shown), and the air intake part 3 is equipped with a gas supply nozzle 4 to supply the necessary gas for combustion. It is designed to take in all the air when gas is supplied.
一方、前記遠心送風機２には、モーター１１に
よつて回転して燃料ガスと共に空気を取入れるフ
アン１２の他に、同軸で回転する二次フアン１３
をフアン１２の反対側に取付ける。 On the other hand, the centrifugal blower 2 includes a fan 12 that is rotated by a motor 11 and takes in air together with fuel gas, and a secondary fan 13 that rotates coaxially.
Attach it to the opposite side of fan 12.
この二次フアン１３によつて取入れられた二次
空気は、送風管１４によつて家庭用給湯装置Ａの
燃焼室１５まで送られる。そして、この二次空気
は、略長方形状の燃焼用炎口面板８を横に配する
ことで前面と背面とが燃焼用炎口面板８の長辺部
分となる燃焼室１５のその前面と背面の側壁に接
するように設けてある空気噴出管１６に送られ、
この空気噴出管１６に、燃焼用炎口面板８に面す
る側全体にわたつて設けてある二次空気噴出孔１
８から火炎１７の先端或いはその近傍に燃焼用炎
口面板８全面にわたつて二次空気を噴出させるも
のである。この場合に、送風管１４は燃焼室１５
の前記両側壁に配してある空気噴出管１６にそれ
ぞれ送るので、予め、２系統に分岐させておく。 The secondary air taken in by the secondary fan 13 is sent to the combustion chamber 15 of the household water heater A through the blast pipe 14. This secondary air is then transferred to the front and back surfaces of the combustion chamber 15, where the substantially rectangular combustion flame face plate 8 is arranged horizontally, so that the front and back sides become the long side portions of the combustion flame face plate 8. The air is sent to an air jet pipe 16 provided so as to be in contact with the side wall of the
Secondary air jet holes 1 are provided in this air jet pipe 16 over the entire side facing the combustion flame face plate 8.
8 to the tip of the flame 17 or in the vicinity thereof, secondary air is blown out over the entire surface of the combustion flame face plate 8. In this case, the blast pipe 14 is connected to the combustion chamber 15.
Since the air is sent to the air ejection pipes 16 arranged on both side walls of the air, the air is branched into two systems in advance.
このように形成した家庭用給湯装置Ａの内部に
おける全一次予混合燃焼装置１による燃焼状態を
次に説明する。 The combustion state by the all-primary premix combustion device 1 inside the household water heater A constructed as described above will be described next.
すなわち、先ず、遠心送風機２のモーター１１
を回転させると共に、ガス供給ノズル４から燃料
ガスを供給すると、空気取入部３から、燃料ガス
と燃焼に用いられる十分な量の空気とが同時に吸
込まれ遠心送風機２のフアン１２によつて攪拌さ
れる。 That is, first, the motor 11 of the centrifugal blower 2
When the fuel gas is rotated and fuel gas is supplied from the gas supply nozzle 4, the fuel gas and a sufficient amount of air used for combustion are simultaneously sucked in from the air intake part 3 and stirred by the fan 12 of the centrifugal blower 2. Ru.
そして、吸込まれて攪拌された二つの気体は均
圧部７にて更に攪拌、分散、均圧され混合ガスと
なつて燃焼用炎口面板８へ送られる。 The two gases that have been sucked in and stirred are further stirred, dispersed, and pressure-equalized in the pressure equalization section 7 to form a mixed gas and sent to the combustion flame face plate 8.
燃焼用炎口面板８に送られた混合ガスは点火さ
れ燃焼させられる。 The mixed gas sent to the combustion flame face plate 8 is ignited and combusted.
一方、遠心送風機２のモーター１１が回転する
ことで前記二次フアン１３も回転し送風を始め
る。 On the other hand, as the motor 11 of the centrifugal blower 2 rotates, the secondary fan 13 also rotates and starts blowing air.
この送風される空気は、送風管１４を通つて二
つに分岐し、前記２本の空気噴出管１６にそれぞ
れ送られ、その空気は、二次空気噴出孔１８から
前記燃焼によつて発生している火炎１７の先端或
いはその近傍に二次空気として噴出させる。 This blown air passes through the blast pipe 14, branches into two, and is sent to the two air jet pipes 16, respectively, and the air is generated from the secondary air jet hole 18 by the combustion. The secondary air is ejected at or near the tip of the flame 17.
又、燃焼において、混合ガスは燃焼する際に、
平衡濃度の関係でCOの発生を完全になくすこと
はできない。そのため、どうしても発生したCO
が燃焼室１５から排気口に向つて排出されてしま
う。そこで、前述したように火炎１７の先端或い
はその近傍に二次空気を送込むことでこの火炎帯
で発生したCOを酸化して二酸化炭素にし排出さ
せる。 Also, in combustion, when the mixed gas burns,
CO generation cannot be completely eliminated due to the equilibrium concentration. Therefore, the CO that is inevitably generated
is discharged from the combustion chamber 15 toward the exhaust port. Therefore, as described above, by feeding secondary air into or near the tip of the flame 17, the CO generated in this flame zone is oxidized and converted into carbon dioxide and discharged.
一方、燃焼ガスの温度が、約700℃以上の温度
範囲内においては、低ければ低い程COの発生率
が少なくなる。これは、既に各種文献等で発表さ
れ且つ実証されているように、空気比を増加さ
せ、それによつて断熱火炎温度を低下させてCO
平衡温度を低下させることによりCOの発生を抑
制できる原理に基くものである。 On the other hand, within a temperature range of about 700° C. or higher, the lower the temperature of the combustion gas, the lower the rate of CO generation. As has already been published and demonstrated in various literature, this increases the air ratio, thereby lowering the adiabatic flame temperature and reducing CO2.
It is based on the principle that CO generation can be suppressed by lowering the equilibrium temperature.
そこで、火炎１７の先端或いはその近傍に二次
空気を噴射させると火炎よりも下流において燃焼
ガスの温度は低下する。その結果、二次空気を噴
出させない状態に比較してCOの発生は格段に低
下する。そうすれば、前述したようなCOの酸化
と相俟つてCO発生を抑制する効果は非常に大き
くなるものであり、実際にはほとんど発生しない
と言つても良い程度までCOの発生を抑制するこ
とができるものである。 Therefore, when secondary air is injected at or near the tip of the flame 17, the temperature of the combustion gas downstream of the flame decreases. As a result, the generation of CO is significantly reduced compared to a state where secondary air is not blown out. If this is done, the effect of suppressing CO generation in combination with the oxidation of CO as mentioned above will be extremely large, and in reality, CO generation can be suppressed to the extent that it can be said that almost no generation occurs. It is something that can be done.
又、燃焼室１５内の気体は、前述のように二次
空気を燃焼室１５内に噴出させることで、燃焼室
１５内の空気の量はその噴出した分が多くなる。 Further, as for the gas in the combustion chamber 15, by injecting secondary air into the combustion chamber 15 as described above, the amount of air in the combustion chamber 15 increases by the amount of air ejected.
そうすると、燃焼によつて発生する水分の量は
ほぼ一定であるから、その水分に対する燃焼室１
５内の気体の絶対量は多くなる。従つて、燃焼室
１５内の絶対湿度は当然低くなり、その結果、燃
焼室１５内の露点温度が上り、熱交換器９によつ
て熱が奪われて排出ガスが冷却された時に発生す
るドレンも当然少なくなるものである。 Then, since the amount of moisture generated by combustion is almost constant, the combustion chamber 1 for that moisture is
The absolute amount of gas within 5 increases. Therefore, the absolute humidity in the combustion chamber 15 naturally becomes low, and as a result, the dew point temperature in the combustion chamber 15 increases, and the drain generated when heat is removed by the heat exchanger 9 and the exhaust gas is cooled. Naturally, this will also decrease.
一方、燃焼用炎口面板８の長辺部分となる燃焼
室１５のその前面と背面の側壁に接するように設
けてある空気噴出管１６ににじ空気が送られるこ
とで、その側壁全体を冷却するものである。 On the other hand, air is sent to the air jet pipes 16 provided in contact with the front and back side walls of the combustion chamber 15, which are the long sides of the combustion flame face plate 8, thereby cooling the entire side walls. It is something to do.
そうすると、燃焼室１５内は過熱することがな
くなるので、過熱によつて生じるCO2からCOへ
のかえり現象もなくなりCOの発生を抑えること
ができる。しかも、燃焼室１５内の過熱がなけれ
ば、水管２１内の水の沸騰を防止でき、従つて気
泡の破裂による騒音を防止できると共に、過熱に
よる水管２１内の影響がなくなるので出湯能力を
広範囲に調節して使用することができる。更に
は、燃焼室の温度が過熱により異常に高くならな
いから、NOxの発生も非常に少なくなるもので
ある。 Then, the inside of the combustion chamber 15 will not be overheated, and the phenomenon of CO 2 turning back into CO due to overheating will also be eliminated, making it possible to suppress the generation of CO. Moreover, if there is no overheating in the combustion chamber 15, water in the water pipe 21 can be prevented from boiling, noise caused by bursting of bubbles can be prevented, and the hot water dispensing capacity can be expanded over a wide range since the influence of overheating inside the water pipe 21 is eliminated. It can be adjusted and used. Furthermore, since the temperature of the combustion chamber does not become abnormally high due to overheating, the generation of NO x is extremely reduced.
尚、図中の符号２２は熱交換器９の冷却フイン
であり、この発明に係る全一次予混合燃焼装置１
の構造は、前述した各実施例の構造に限定される
ものではないことは言うまでもない。 Note that the reference numeral 22 in the figure is a cooling fin of the heat exchanger 9, and the all-primary premix combustion device 1 according to the present invention
It goes without saying that the structure of is not limited to the structure of each embodiment described above.
［発明の効果］
上述の如く構成したこの発明は、燃料ガス供給
時に、燃焼に必要な量以上の空気を予め混合させ
て燃焼させる全一次予混合方式の燃焼方法におい
て、略長方形状の炎口面板８からの燃焼火炎１７
の先端或いはその近傍に、燃焼室１５の長手方向
側壁に炎口面板８の略長手方向全体の長さで接す
るように配した空気噴出管１６より全ての燃焼火
炎１７全体にわたつて二次空気を噴出させると共
に、噴出すべく空気噴出管１６内を通過する二次
空気によつて燃焼室１５の長手方向側壁及びその
近傍を冷却することにより、万遍なく二次空気が
火炎１７全体にゆきわたり、火炎１７がリフトし
ない状態での空気比にて安定燃焼を行なわせると
共に、火炎よりも下流部での燃焼に二次空気を併
合させると、前述したように、火炎１７に何等影
響を及ぼさない状態で空気比を増加させ、断熱火
炎温度を低下させてCO平衡温度を低下させるこ
とができ、COが少なく且つドレンの付き難い燃
焼が可能になる。[Effects of the Invention] The present invention configured as described above uses a substantially rectangular flame port in an all-primary premix combustion method in which air in an amount greater than the amount required for combustion is premixed and combusted when fuel gas is supplied. Combustion flame 17 from face plate 8
Secondary air is supplied over all the combustion flames 17 from an air jet pipe 16 disposed at or near the tip of the combustion chamber 15 so as to be in contact with the longitudinal side wall of the combustion chamber 15 over substantially the entire length of the flame face plate 8 in the longitudinal direction. By ejecting the flame and cooling the longitudinal side wall of the combustion chamber 15 and its vicinity by the secondary air passing through the air ejection pipe 16 in order to eject it, the secondary air is evenly distributed over the entire flame 17. As mentioned above, if stable combustion is performed at the air ratio in a state where the flame 17 does not lift, and if secondary air is combined with the combustion downstream of the flame, the flame 17 will not be affected in any way. It is possible to increase the air ratio and lower the adiabatic flame temperature, thereby lowering the CO equilibrium temperature, making it possible to achieve combustion with less CO and less drainage.
しかも、燃焼によつて発生する水分の量はほぼ
一定であるから、その水分に対する燃焼室１５内
の気体の絶対量は多くなる。従つて、燃焼室１５
内の絶対湿度は当然低くなり、その結果、燃焼室
１５内の露点温度が上り、熱交換器９によつて熱
が奪われて排出ガスが冷却された時に発生するド
レンも当然少なくなるものである。 Moreover, since the amount of moisture generated by combustion is approximately constant, the absolute amount of gas in the combustion chamber 15 relative to the moisture increases. Therefore, the combustion chamber 15
Naturally, the absolute humidity within the combustion chamber 15 will be lower, and as a result, the dew point temperature within the combustion chamber 15 will rise, and the amount of condensate that will be generated when heat is removed by the heat exchanger 9 and the exhaust gas is cooled will naturally decrease. be.
又、燃焼用炎口面板８の長辺部分となる燃焼室
１５のその前面と背面の側壁に接するように設け
てある空気噴出管１６ににじ空気が送られること
で、その側壁全体を冷却するものである。 In addition, air is sent to the air jet pipes 16 provided in contact with the front and back side walls of the combustion chamber 15, which are the long sides of the combustion flame face plate 8, thereby cooling the entire side walls. It is something to do.
そうすると、燃焼室１５内は過熱することがな
くなるので、過熱によつて生じるCO2からCOへ
のかえり現象もなくなりCOの発生を抑えること
ができる。しかも、燃焼室１５内の過熱がなけれ
ば、水管２１内の水の沸騰を防止でき、従つて気
泡の破裂による騒音を防止できると共に、過熱に
よる水管２１内の影響がなくなるので出湯能力を
広範囲に調節して使用することができる。更に
は、燃焼室の温度が過熱により異常に高くならな
いから、NOxの発生も非常に少なくなるもので
ある。 Then, the inside of the combustion chamber 15 will not be overheated, and the phenomenon of CO 2 turning back into CO due to overheating will also be eliminated, making it possible to suppress the generation of CO. Moreover, if there is no overheating in the combustion chamber 15, water in the water pipe 21 can be prevented from boiling, noise caused by bursting of bubbles can be prevented, and the hot water dispensing capacity can be expanded over a wide range since the influence of overheating inside the water pipe 21 is eliminated. It can be adjusted and used. Furthermore, since the temperature of the combustion chamber does not become abnormally high due to overheating, the generation of NO x is extremely reduced.
そして、その全一次予混合燃焼装置Ｂの構造
も、燃料ガス供給時に、送風機２により、燃焼に
必要な量以上の空気を予め吸入して混合させなが
ら炎口へ送り、その混合ガスを炎口にて燃焼させ
る全一次予混合方式の燃焼装置において、炎口を
形成する炎口面板８を略長方形状に形成し、空気
噴出管１６を燃焼室１５の長手方向側壁に炎口面
板８の略長手方向全体の長さで接するように配
し、この空気噴出管１６には、炎口にて燃焼させ
ることで得られた火炎１７の先端、或いはその近
傍へ、全ての燃焼火炎全体にわたつて二次空気を
噴出させるべく二次空気噴出孔１８を空気噴出管
１６の炎口面板８に面する側全体にわたつて適数
個設けてあるから、従来の全一次予混合燃焼装置
に二次空気を送るための構造を追加しただけのも
のなので、ほとんどコストアツプにつながること
はなく、比較的安価にて提供できるものである。
しかも、上記空気噴出管１６の配置から、二次空
気が各火炎に万遍なくゆきわたると共に、空気噴
出管１６による燃焼室１５の冷却効果も得ること
ができるため、過熱を防止して安定した燃焼を確
保すると共に、前述したように、ドレンの発生も
少なく、過熱によつて生じるCO2からCOへのか
えり現象もなくなりCOの発生を抑えることがで
き、騒音を防止でき且つ過熱による水管２１内の
影響がなくなるので出湯能力を広範囲に調節して
使用することができ、更には、NOxの発生も非
常に少なくなるものである。 The structure of the all-primary premix combustion device B is such that when fuel gas is supplied, air in excess of the amount required for combustion is sucked in in advance by the blower 2, mixed and sent to the flame nozzle, and the mixed gas is sent to the flame nozzle. In an all-primary premixing type combustion apparatus for combustion, the flame face plate 8 that forms the flame mouth is formed into a substantially rectangular shape, and the air jet pipe 16 is attached to the side wall in the longitudinal direction of the combustion chamber 15 in a substantially rectangular shape. The air jet pipes 16 are arranged so as to be in contact with each other along the entire length in the longitudinal direction, and the air jet pipes 16 have air jets that extend over all of the combustion flames to the tip of the flame 17 obtained by combustion at the flame opening, or to the vicinity thereof. In order to blow out secondary air, an appropriate number of secondary air blow-off holes 18 are provided over the entire side of the air blow-off pipe 16 facing the flame port face plate 8. Since it is simply an additional structure for sending air, there is almost no increase in costs and it can be provided at a relatively low cost.
Moreover, due to the arrangement of the air jet pipes 16, the secondary air can evenly spread to each flame, and the air jet pipes 16 can also have a cooling effect on the combustion chamber 15, thereby preventing overheating and ensuring stable combustion. In addition to ensuring the Since the influence of water is eliminated, the hot water output capacity can be adjusted over a wide range of uses, and furthermore, the generation of NO x is extremely reduced.
以上説明したように、この発明によれば、燃焼
の際に、CO、NOx及びドレンの発生を抑制しな
がら高負荷燃焼を行なえるようにし、しかも、高
性能で公害や中毒の発生がなく且つ過熱防止の冷
却効果も二次空気によつて行うことができ、更に
は騒音も少なく出湯能力を広範囲に調節でき、そ
れらを簡単な構造のもので行なうことができるか
ら安価な全一次予混合燃焼装置を提供できる等の
種々の優れた効果を奏する。 As explained above, according to the present invention, it is possible to perform high-load combustion while suppressing the generation of CO, NO In addition, the cooling effect to prevent overheating can be achieved using secondary air, and furthermore, there is little noise, the hot water output capacity can be adjusted over a wide range, and these can be achieved with a simple structure, making it an inexpensive all-primary premix. It has various excellent effects such as being able to provide a combustion device.
図面はこの発明の実施例を示すもので、第１図
は正断面図、第２図は側断面図である。
Ａ……家庭用給湯装置、１……全一次予混合燃
焼装置、２……遠心送風機、３……空気取入部、
４……ガス供給ノズル、５……送風出口、６……
分散均圧板、７……均圧部、８……燃焼用炎口面
板、９……熱交換器、１０……ケース、１１……
モーター、１２……フアン、１３……二次フア
ン、１４……送風管、１５……燃焼室、１６……
空気噴出管、１７……火炎、１８……二次空気噴
出孔、２１……水管。
The drawings show an embodiment of the invention, with FIG. 1 being a front sectional view and FIG. 2 being a side sectional view. A...Home water heater, 1...All primary premix combustion device, 2...Centrifugal blower, 3...Air intake part,
4... Gas supply nozzle, 5... Air outlet, 6...
Distributed pressure equalization plate, 7... Pressure equalization section, 8... Flame outlet face plate for combustion, 9... Heat exchanger, 10... Case, 11...
Motor, 12... Fan, 13... Secondary fan, 14... Air pipe, 15... Combustion chamber, 16...
Air jet pipe, 17...Flame, 18...Secondary air vent, 21...Water pipe.
Claims (1)
気を予め混合させて燃焼させる全一次予混合方式
の燃焼方法において、略長方形状の炎口面板から
の燃焼火炎の先端或いはその近傍に、燃焼室の長
手方向側壁に炎口面板の略長手方向全体の長さで
接するように配した空気噴出管より全ての燃焼火
炎全体にわたつて二次空気を噴出させると共に、
噴出すべく空気噴出管内を通過する二次空気によ
つて燃焼室の長手方向側壁及びその近傍を冷却す
ることを特徴とする全一次予混合燃焼方法。 ２ 燃料ガス供給時に、送風機により、燃焼に必
要な量以上の空気を予め吸入して混合させながら
炎口へ送り、その混合ガスを炎口にて燃焼させる
全一次予混合方式の燃焼装置において、炎口を形
成する炎口面板を略長方形状に形成し、空気噴出
管を燃焼室の長手方向側壁に炎口面板の略長手方
向全体の長さで接するように配し、この空気噴出
管には、炎口にて燃焼させることで得られた火炎
の先端、或いはその近傍へ、全ての燃焼火炎全体
にわたつて二次空気を噴出させるべく二次空気噴
出孔を空気噴出管の炎口面板に面する側全体にわ
たつて適数個設けたことを特徴とする全一次予混
合燃焼装置。 ３ 二次空気は、燃焼に必要な空気を吸入する送
風機のフアン駆動軸に取付けた二次空気用フアン
の送風によつて空気を二次空気噴出孔に送り噴出
させるようにした特許請求の範囲第２項記載の全
一次予混合燃焼装置。[Scope of Claims] 1. In an all-primary premix combustion method in which air in excess of the amount required for combustion is premixed and combusted when fuel gas is supplied, the tip of the combustion flame from a substantially rectangular flame face plate. or in the vicinity thereof, blowing out secondary air over all the combustion flames from an air blowing pipe arranged so as to be in contact with the longitudinal side wall of the combustion chamber along substantially the entire length in the longitudinal direction of the burner face plate, and
An all-primary premix combustion method characterized in that a longitudinal side wall of a combustion chamber and its vicinity are cooled by secondary air passing through an air ejection pipe to be ejected. 2. In an all-primary premixing type combustion device in which when fuel gas is supplied, air in excess of the amount required for combustion is sucked in in advance by a blower, mixed and sent to the flame port, and the mixed gas is combusted at the flame port. The flame outlet face plate that forms the flame outlet is formed into a substantially rectangular shape, and the air jet pipe is arranged so as to be in contact with the longitudinal side wall of the combustion chamber along approximately the entire length of the flame mouth face plate in the longitudinal direction. In order to blow out secondary air over all the combustion flames to the tip of the flame obtained by combustion at the flame mouth or its vicinity, the secondary air jet hole is installed in the flame face plate of the air jet tube. An all-primary premix combustion device characterized in that an appropriate number of units are provided over the entire side facing the. 3. Claims in which the secondary air is sent to a secondary air outlet and ejected by blowing from a secondary air fan attached to the fan drive shaft of a blower that sucks in the air necessary for combustion. 2. The all-primary premix combustion device according to item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31308986A JPS63163706A (en) | 1986-12-26 | 1986-12-26 | Whole primary air premixing combustion method and its apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31308986A JPS63163706A (en) | 1986-12-26 | 1986-12-26 | Whole primary air premixing combustion method and its apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63163706A JPS63163706A (en) | 1988-07-07 |
| JPH0561523B2 true JPH0561523B2 (en) | 1993-09-06 |
Family
ID=18037043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31308986A Granted JPS63163706A (en) | 1986-12-26 | 1986-12-26 | Whole primary air premixing combustion method and its apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63163706A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002084176A1 (en) * | 2001-04-14 | 2002-10-24 | Seil Architecture & Engineering Company | Device for increasing heat power of gas burner |
| CN113007706A (en) * | 2021-02-05 | 2021-06-22 | 浙江大学 | Pipe-cooled gas premixing ultra-low nitrogen combustor and premixing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837018B2 (en) * | 1973-08-16 | 1983-08-13 | エクソン リサ−チ エンド エンジニアリング コンパニ− | Saiseihou |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837018U (en) * | 1981-08-28 | 1983-03-10 | 東陶機器株式会社 | Premixed gas burner |
-
1986
- 1986-12-26 JP JP31308986A patent/JPS63163706A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837018B2 (en) * | 1973-08-16 | 1983-08-13 | エクソン リサ−チ エンド エンジニアリング コンパニ− | Saiseihou |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63163706A (en) | 1988-07-07 |
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