JPH10300027A - Catalytic combustion apparatus - Google Patents
Catalytic combustion apparatusInfo
- Publication number
- JPH10300027A JPH10300027A JP11409597A JP11409597A JPH10300027A JP H10300027 A JPH10300027 A JP H10300027A JP 11409597 A JP11409597 A JP 11409597A JP 11409597 A JP11409597 A JP 11409597A JP H10300027 A JPH10300027 A JP H10300027A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- catalytic combustion
- catalyst
- radiant
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Spray-Type Burners (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は主として、家庭用、
または業務用の給湯、暖房に適用する触媒燃焼装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to home use,
Alternatively, the present invention relates to a catalytic combustion device applied to hot water supply and heating for business use.
【０００２】[0002]
【従来の技術】白金やパラジウム等の貴金属触媒をコー
ジライト等の坦体に担持した触媒体を触媒燃焼させ、熱
交換部を設けて燃焼熱を暖房等に利用する触媒燃焼装置
が提案されている（例えば、特願平４−３０２３４
７）。この従来の触媒燃焼装置では、ハニカム状の触媒
体の、混合気上流側に触媒体からの輻射を受けるように
熱交換部を設置しており、触媒燃焼開始時は予熱バーナ
で火炎燃焼させて触媒体を活性化温度以上に加熱した
後、混合気の供給を停止して予熱バーナの火炎を消炎さ
せ、再び、混合気を供給して触媒燃焼させていた。2. Description of the Related Art A catalytic combustion apparatus has been proposed in which a catalytic body in which a noble metal catalyst such as platinum or palladium is carried on a carrier such as cordierite is catalytically burned, and a heat exchange unit is provided to utilize the combustion heat for heating or the like. (For example, Japanese Patent Application No. 4-30234)
7). In this conventional catalytic combustion device, a heat exchange section is provided on the upstream side of the air-fuel mixture of the honeycomb-shaped catalyst body so as to receive radiation from the catalyst body. After heating the catalyst body to the activation temperature or higher, the supply of the air-fuel mixture is stopped to extinguish the flame of the preheating burner, and the air-fuel mixture is supplied again to perform catalytic combustion.
【０００３】[0003]
【発明が解決しようとする課題】このような従来の触媒
燃焼装置には以下のような課題がある。However, such a conventional catalytic combustion apparatus has the following problems.
【０００４】まず、触媒燃焼は燃焼温度が低いため、熱
交換量を増加させようとすると、触媒体が大きくなり、
機器全体として小型化を実現し難かった。触媒体が大き
くなると、特に低燃焼量領域で燃焼安定性が不十分とな
りやすく、燃焼量可変範囲を拡大し難くなる。一方、触
媒体を小さくして小型化を図ろうとすると、触媒体の温
度が上昇し、耐熱限界を超えてしまうという課題があっ
た。また、触媒燃焼開始時に予熱バーナで火炎燃焼させ
た後、混合気の供給を停止して予熱バーナの火炎を消炎
させ、再び、混合気を供給して触媒燃焼させる方法は制
御が複雑になりやすいとともに、火炎燃焼時に窒素酸化
物（ＮＯｘ）が発生するという課題があった。[0004] First, since catalytic combustion has a low combustion temperature, if an attempt is made to increase the amount of heat exchange, the catalytic body becomes large,
It was difficult to reduce the size of the entire device. When the catalyst body is large, combustion stability tends to be insufficient particularly in a low combustion amount region, and it becomes difficult to expand the combustion amount variable range. On the other hand, when trying to reduce the size of the catalyst body to reduce its size, there has been a problem that the temperature of the catalyst body rises and exceeds the heat resistance limit. Further, after the flame is burned by the preheating burner at the start of catalytic combustion, the supply of the air-fuel mixture is stopped to extinguish the flame of the preheated burner, and the method of supplying the air-fuel mixture again to perform catalytic combustion tends to be complicated. In addition, there is a problem that nitrogen oxides (NOx) are generated during flame combustion.
【０００５】本発明は、このような従来の触媒燃焼装置
の課題を考慮し、小型化を図ることができるとともに、
燃焼量可変範囲（ＴＤＲ）を拡大することも可能となる
触媒燃焼装置を提供することを目的とするものである。The present invention can reduce the size in consideration of the problems of such a conventional catalytic combustion device,
It is an object of the present invention to provide a catalytic combustion device capable of expanding a variable combustion amount range (TDR).
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
するため、第一の手段として、燃料と空気の混合ガス供
給部と、混合ガス供給部の流れ方向下流に対向して設け
た通気性を有する２枚の平面状の触媒体と、２枚の触媒
体の間に形成した混合気経路を設けた触媒燃焼装置とす
る。According to the present invention, as a first means for solving the above-mentioned problems, as a first means, a mixed gas supply section of fuel and air, and a vent provided oppositely in the flow direction of the mixed gas supply section are provided. The catalytic combustion device is provided with two planar catalyst bodies having properties and a mixture path formed between the two catalyst bodies.
【０００７】第二の手段として、２枚の平面状の触媒体
の間に形成した混合気経路に、被加熱流体を入れた熱交
換部を有する輻射受熱体を触媒体に対面して設けた第一
の手段の触媒燃焼装置とする。As a second means, a radiant heat receiver having a heat exchange section containing a fluid to be heated is provided facing the catalyst body in a mixture path formed between the two planar catalyst bodies. The first means is a catalytic combustion device.
【０００８】第三の手段として、２枚の平面状の触媒体
の間に形成した混合気経路に、輻射受熱板を触媒体に対
面して設けた第一の手段の触媒燃焼装置とする。[0008] As a third means, a catalytic combustion device of the first means is provided in which a radiant heat receiving plate is provided facing a catalyst body in a mixture path formed between two planar catalyst bodies.
【０００９】第四の手段として、２枚の平面状の触媒体
の間に形成した混合気経路に、被加熱流体を入れた熱交
換部を外部から間接加熱する熱媒体を封入した輻射間接
受熱体を触媒体に対面して設けた第一の手段の触媒燃焼
装置とする。As a fourth means, a radiant indirect receiver in which a heat medium for indirectly heating a heat exchange section containing a fluid to be heated from the outside is enclosed in a mixture path formed between two planar catalyst bodies. A first means is a catalytic combustion device provided with a heating element facing the catalyst.
【００１０】第五の手段として、輻射受熱体、輻射受熱
板、または輻射間接受熱体の上流側に電気ヒータを設
け、燃焼開始時に電気ヒータに通電し、燃焼用空気を流
入して２枚の平面状の触媒体を加熱した後、電気ヒータ
への通電を停止し、燃料を供給して触媒燃焼を開始する
第二、第三、第四の手段の触媒燃焼装置とする。As a fifth means, an electric heater is provided on the upstream side of the radiant heat receiving body, the radiant heat receiving plate, or the radiant indirect heat receiving body. After heating the planar catalyst body, the energization to the electric heater is stopped, the fuel is supplied, and the catalytic combustion is started.
【００１１】[0011]
（実施の形態１）以下、図面を用いて本発明の実施の形
態１について説明する。図１は実施の形態１の断面図で
ある。実施の形態１の触媒燃焼装置の主要部は、触媒体
１、触媒体支持２、固定板３、燃焼室壁４、輻射受熱体
５、輻射受熱体５の熱交換部５ａ、輻射受熱体５の受熱
板部５ｂ、整流部６、混合気経路７、排気熱交換体８、
排気熱交換体８の熱交換部８ａ、排気熱交換体８の突出
部（フィン）８ｂ、排気経路９、排気孔１０で構成して
いる。(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of the first embodiment. The main parts of the catalytic combustion device according to the first embodiment include a catalyst 1, a catalyst support 2, a fixing plate 3, a combustion chamber wall 4, a radiant heat receiver 5, a heat exchange part 5a of the radiant heat receiver 5, and a radiant heat receiver 5. Heat receiving plate portion 5b, rectifying portion 6, mixture path 7, exhaust heat exchanger 8,
It comprises a heat exchange portion 8 a of the exhaust heat exchanger 8, a protruding portion (fin) 8 b of the exhaust heat exchanger 8, an exhaust passage 9, and an exhaust hole 10.
【００１２】触媒体１は通気性を有するコージライトハ
ニカムを担体とし、パラジウム、白金等の貴金属系触媒
を担持したものである。触媒体１は２枚、混合気上流側
が内側になるように所定距離を設けて対向させている。
輻射受熱体５は２枚の触媒体１の間に輻射を受けやすい
ように触媒体１に対向して設けており、輻射受熱体５の
両側に受熱板部５ｂを設け、受熱板部５ｂの間に熱交換
部５ａをはさみこむようにして接合している。熱交換部
５ａには被加熱流体を入れている。整流部６は輻射受熱
体５の混合気上流側に設けている。触媒体１の外側に排
気経路９を介して排気熱交換体８を設置しており、排気
熱交換体８の外側に熱交換部８ａを設けている。混合気
経路７の上流側には、混合気噴出孔１１、混合ガス供給
部１２を設けており、混合気噴出孔１１の下流側に点火
ヒータ１３を設置している。The catalyst body 1 uses a cordierite honeycomb having air permeability as a carrier and carries a noble metal catalyst such as palladium or platinum. The two catalyst bodies 1 are opposed to each other at a predetermined distance so that the upstream side of the air-fuel mixture is inside.
The radiant heat receiver 5 is provided opposite to the catalyst body 1 so as to easily receive radiation between the two catalyst bodies 1, and the heat receiver plates 5 b are provided on both sides of the radiant heat receiver 5. The heat exchange part 5a is joined so as to be inserted therebetween. The heat exchange section 5a contains a fluid to be heated. The rectifying section 6 is provided on the upstream side of the air-fuel mixture of the radiation heat receiving body 5. An exhaust heat exchanger 8 is provided outside the catalyst body 1 via an exhaust path 9, and a heat exchange unit 8 a is provided outside the exhaust heat exchanger 8. An air-fuel mixture outlet 11 and a mixed gas supply unit 12 are provided upstream of the air-fuel mixture path 7, and an ignition heater 13 is installed downstream of the air-fuel mixture outlet 11.
【００１３】次に、本実施の形態の動作について説明を
行なう。Next, the operation of this embodiment will be described.
【００１４】まず、燃焼開始時には点火ヒータ１３に通
電して混合気を混合ガス供給部１２から供給し、混合気
噴出孔１１に火炎を形成し、触媒体１を活性化温度以上
に加熱した後、燃料の供給を停止して混合気噴出孔１１
の火炎を消炎させ、再び、燃料を供給して触媒燃焼させ
る。触媒燃焼時に触媒体１の上流面が赤熱され、上流側
に放射エネルギーが射出される。この放射エネルギーは
輻射受熱体５で吸収されて再び熱エネルギーに変換され
ることにより、触媒体１から輻射受熱体５へ放射伝熱さ
れる。その後、熱エネルギーは熱伝導により、輻射受熱
体の受熱板部５ｂから熱交換部５ａを通り、さらに対流
熱伝達により、熱交換部５ａ内の被加熱流体へ伝熱され
る。放射伝熱は混合気の流れを乱さないため、触媒体１
上流面における燃焼反応が阻害されることがなく、被加
熱流体への熱交換量を増加させても燃焼安定性を確保す
ることができる。First, at the start of combustion, the ignition heater 13 is energized to supply a mixture to the mixture gas supply unit 12 to form a flame in the mixture mixture ejection hole 11 and heat the catalyst 1 to an activation temperature or higher. , The fuel supply is stopped and the mixture
Is extinguished, and fuel is again supplied to perform catalytic combustion. At the time of catalytic combustion, the upstream surface of the catalyst 1 is glowed red, and radiant energy is emitted upstream. This radiant energy is absorbed by the radiant heat receiver 5 and converted into heat energy again, so that radiant heat is transferred from the catalyst 1 to the radiant heat receiver 5. Thereafter, the heat energy is transferred by heat conduction from the heat receiving plate portion 5b of the radiant heat receiving body, through the heat exchange portion 5a, and further to the fluid to be heated in the heat exchange portion 5a by convective heat transfer. Since the radiant heat transfer does not disturb the flow of the mixture, the catalyst 1
The combustion reaction on the upstream surface is not hindered, and combustion stability can be ensured even if the amount of heat exchange with the fluid to be heated is increased.
【００１５】触媒体１を通過した燃焼ガスは外側の排気
経路９を通り、排気孔１０から排出される。排気経路９
では、燃焼ガスの熱が対流熱伝達により、排気熱交換体
８へ伝熱される。触媒体１の下流側表面温度が高い時に
は、触媒体１から排気熱交換体８への放射伝熱も有効と
なる。その後、熱は熱伝導により、排気熱交換体の突出
部（フィン）８ｂから熱交換部８ａを通り、さらに対流
熱伝達により、熱交換部８ａ内の被加熱流体へ伝熱され
る。The combustion gas that has passed through the catalyst 1 passes through the exhaust path 9 on the outside and is exhausted from the exhaust holes 10. Exhaust path 9
Then, the heat of the combustion gas is transferred to the exhaust heat exchanger 8 by convective heat transfer. When the downstream surface temperature of the catalyst 1 is high, radiative heat transfer from the catalyst 1 to the exhaust heat exchanger 8 is also effective. Thereafter, heat is transferred from the projecting portion (fin) 8b of the exhaust heat exchanger through the heat exchanging portion 8a by heat conduction to the fluid to be heated in the heat exchanging portion 8a by convective heat transfer.
【００１６】この構成により、高燃焼量領域において、
触媒体１の上流側表面温度を低減して耐熱限界温度以下
に抑制し、高負荷タイプの熱交換一体型触媒燃焼器を実
現できるため、機器の小型化が可能となる。With this configuration, in the high combustion amount region,
Since the surface temperature of the upstream side of the catalyst body 1 is reduced to a temperature lower than the heat-resistant limit temperature and a high-load-type heat exchange integrated catalytic combustor can be realized, the size of the equipment can be reduced.
【００１７】このように、混合ガス供給部１２と、混合
ガス供給部１２の流れ方向下流に対向して設けた通気性
を有する２枚の平面状の触媒体１と、２枚の触媒体１の
間に形成した混合気経路７を設けることにより、触媒燃
焼装置として、小型化を図ることができるとともに、触
媒体１上流側を保温領域とし、低燃焼量領域における燃
焼安定性を向上させて燃焼量可変範囲（ＴＤＲ）を拡大
することも可能となる。As described above, the mixed gas supply section 12, the two air-permeable planar catalyst bodies 1 provided opposite to each other in the flow direction of the mixed gas supply section 12, and the two catalyst bodies 1 By providing the air-fuel mixture path 7 formed between the two, the size of the catalytic combustion device can be reduced, and the upstream side of the catalyst body 1 is used as a heat retaining region, and the combustion stability in the low combustion amount region is improved. It is also possible to expand the variable combustion amount range (TDR).
【００１８】また、輻射受熱体５の混合気上流側に整流
部６を設けることにより、よどみ点を形成して混合気の
流れを均一化するとともに、混合気の濃度分布を改善
し、触媒反応の均一化を促進することができる。また、
混合気噴出孔１１に火炎を形成する時には、整流部６が
保炎作用を成し、火炎安定性を高めることもできる。Further, by providing a rectifying section 6 on the upstream side of the air-fuel mixture of the radiant heat receiving body 5, a stagnation point is formed, the flow of the air-fuel mixture is made uniform, the distribution of the air-fuel mixture is improved, and the catalytic reaction is performed. Can be promoted. Also,
When a flame is formed in the air-fuel mixture ejection hole 11, the rectifying section 6 performs a flame holding action, and the flame stability can be enhanced.
【００１９】また、２枚の平面状の触媒体１の外側に排
気経路９を介して排気熱交換体８を設けることにより、
輻射伝熱も活かし、機器として、小型高効率化を図るこ
とが可能となる。By providing an exhaust heat exchanger 8 outside the two planar catalyst bodies 1 via an exhaust path 9,
By utilizing radiant heat transfer, it is possible to achieve a small and highly efficient device.
【００２０】また、排気熱交換体８の内面に突出部（フ
ィン）８ｂを設け、排気熱交換体８の内面側を高輻射材
で被覆することにより、伝熱面積を増加させて対流熱伝
達性能を高めるとともに、触媒体１からの放射伝熱効率
も向上させることができる。Further, by providing a protruding portion (fin) 8b on the inner surface of the exhaust heat exchanger 8 and covering the inner surface of the exhaust heat exchanger 8 with a high radiation material, the convection heat transfer is increased by increasing the heat transfer area. The performance can be improved, and the radiation heat transfer efficiency from the catalyst body 1 can be improved.
【００２１】（実施の形態２）次に、本発明の実施の形
態２について説明する。図２は実施の形態２の断面図で
ある。実施の形態２の触媒燃焼装置には被加熱流体を入
れた熱交換部５ａを有する輻射受熱体５がなく、輻射受
熱板１４を設けている。輻射受熱板１４としては、アル
ミ合金を用いているが、熱伝導率が高く、耐熱性が優れ
ているものであれば良い。(Embodiment 2) Next, Embodiment 2 of the present invention will be described. FIG. 2 is a sectional view of the second embodiment. The catalytic combustion device according to the second embodiment does not include the radiation heat receiving body 5 having the heat exchange section 5a containing the fluid to be heated, but is provided with the radiation heat receiving plate 14. As the radiation heat receiving plate 14, an aluminum alloy is used, but any material having high thermal conductivity and excellent heat resistance may be used.
【００２２】実施の形態２では、触媒体１からの放射エ
ネルギーを輻射受熱板１４で吸収し、熱エネルギーに変
換することにより、触媒体１から輻射受熱板１４へ放射
伝熱される。その後、熱エネルギーは熱伝導により、輻
射受熱板１４から排気熱交換体の熱交換部８ａを通り、
さらに対流熱伝達により、熱交換部８ａ内の被加熱流体
へ伝熱される。輻射受熱板１４から排気熱交換体８の熱
交換部８ａまでが熱抵抗となるため、実施の形態１に比
較すると、触媒体１から被加熱流体への伝熱効率は低下
しやすいが、機器構成を簡素化できるため、低コスト化
が可能となる。また、熱交換部８ａ近傍に熱抵抗がある
ため、液体燃料を使用した場合にタール等を生成するこ
とがなく、信頼性を確保することができる。In the second embodiment, the radiant energy from the catalyst 1 is absorbed by the radiation heat receiving plate 14 and converted into heat energy, so that the radiant heat is transferred from the catalyst 1 to the radiation heat receiving plate 14. After that, the heat energy is transmitted from the radiation heat receiving plate 14 through the heat exchange portion 8a of the exhaust heat exchanger by heat conduction,
Further, heat is transferred to the fluid to be heated in the heat exchange section 8a by convective heat transfer. Since the heat from the radiant heat receiving plate 14 to the heat exchange portion 8a of the exhaust heat exchanger 8 has a thermal resistance, the efficiency of heat transfer from the catalyst 1 to the fluid to be heated is easily reduced as compared with the first embodiment. Can be simplified, so that the cost can be reduced. Further, since there is a thermal resistance in the vicinity of the heat exchange section 8a, when liquid fuel is used, tar or the like is not generated, and reliability can be secured.
【００２３】（実施の形態３）次に、本発明の実施の形
態３について説明する。図３は実施の形態３の断面図で
ある。実施の形態３の触媒燃焼装置には、混合気経路７
に、輻射間接受熱体１６を触媒体１に対面して設けてい
る。この輻射間接受熱体１６には、熱媒体１５が封入さ
れ、その中に、被加熱流体を入れた熱交換部５ａが配接
されている。熱媒体１５としては、エチレングリコール
水溶液を用いているが、冷凍サイクル等で用いられるブ
ライン類で良い。Third Embodiment Next, a third embodiment of the present invention will be described. FIG. 3 is a sectional view of the third embodiment. In the catalytic combustion device of the third embodiment, the mixture path 7
In addition, a radiant indirect heat receiver 16 is provided so as to face the catalyst 1. A heat medium 15 is sealed in the radiant indirect heat receiver 16, and a heat exchange unit 5 a containing a fluid to be heated is connected to the heat medium 15. As the heat medium 15, an ethylene glycol aqueous solution is used, but brines used in a refrigeration cycle or the like may be used.
【００２４】実施の形態３では、触媒体１からの放射エ
ネルギーを輻射間接受熱体１６で吸収し、熱エネルギー
に変換することにより、触媒体１から輻射間接受熱体１
６へ放射伝熱される。その後、熱エネルギーは対流熱伝
達により、熱媒体１５を介して熱交換部５ａ内の被加熱
流体へ伝熱される。熱媒体１５による間接加熱のため、
実施の形態１に比較すると、触媒体１から被加熱流体へ
の伝熱効率は低下しやすいが、均一加熱を実現できるた
め、被加熱流体を局部的に過熱することがなく、機器と
して、信頼性を高めることが可能となる。In the third embodiment, the radiant energy from the catalyst 1 is absorbed by the radiant indirect heat receiver 16 and converted into thermal energy, so that the radiant indirect heat receiver 1
Radiation heat is transferred to 6. Thereafter, the heat energy is transferred to the fluid to be heated in the heat exchange unit 5a via the heat medium 15 by convective heat transfer. For indirect heating by the heat medium 15,
Compared to the first embodiment, the efficiency of heat transfer from the catalyst body 1 to the fluid to be heated is easily reduced, but uniform heating can be realized, so that the fluid to be heated is not locally overheated, and the reliability as a device is improved. Can be increased.
【００２５】輻射受熱体５、輻射受熱板１４、または輻
射間接受熱体１６の受熱面側を高輻射材で被覆すること
により、触媒体１からの放射伝熱効率を向上させること
ができる。By covering the heat receiving surface side of the radiation heat receiving body 5, the radiation heat receiving plate 14, or the radiation indirect heat receiving body 16 with a high radiation material, the efficiency of heat transfer from the catalyst body 1 can be improved.
【００２６】（実施の形態４）次に、本発明の実施の形
態４について説明する。図４は実施の形態４の断面図で
ある。実施の形態４の触媒燃焼装置には点火ヒータ１３
がなく、触媒体予熱用電気ヒータ１７を設けている。実
施の形態４では、触媒体予熱用電気ヒータ１７を輻射受
熱体５の上流側に設けているが、図２の輻射受熱板１４
や図３の輻射間接受熱体１６の上流側に設けても良い。(Embodiment 4) Next, Embodiment 4 of the present invention will be described. FIG. 4 is a sectional view of the fourth embodiment. An ignition heater 13 is provided in the catalytic combustion device of the fourth embodiment.
And an electric heater 17 for preheating the catalyst body is provided. In the fourth embodiment, the catalyst body preheating electric heater 17 is provided on the upstream side of the radiant heat receiver 5, but the radiant heat receiver 14 of FIG.
Alternatively, it may be provided on the upstream side of the radiant indirect heat receiver 16 of FIG.
【００２７】燃焼開始時には触媒体予熱用電気ヒータ１
７に通電し、燃焼用空気を流入して２枚の平面状の触媒
体１を活性化温度以上に加熱した後、触媒体予熱用電気
ヒータ１７への通電を停止し、燃料を供給して触媒燃焼
を開始する。触媒体１を対流熱伝達により、均一に予熱
できるとともに、触媒体１を火炎予熱する場合と異な
り、ＮＯｘの発生がなく、立ち上げ時の制御も容易であ
る。At the start of combustion, an electric heater 1 for preheating the catalyst body
7, the combustion air is introduced to heat the two planar catalysts 1 to an activation temperature or higher, and then the power supply to the catalyst preheating electric heater 17 is stopped to supply fuel. Start catalytic combustion. The catalyst body 1 can be uniformly preheated by convective heat transfer, and unlike the case where the catalyst body 1 is preheated with a flame, there is no generation of NOx and control during startup is easy.
【００２８】[0028]
【発明の効果】以上、説明したように、本発明の触媒燃
焼装置によれば、次のような効果を得ることができる。As described above, according to the catalytic combustion device of the present invention, the following effects can be obtained.
【００２９】すなわち、２枚の平面状の触媒体を対向さ
せ、触媒体の間に混合気経路を形成することにより、触
媒燃焼装置として、小型化を図ることができるととも
に、触媒体上流側を保温領域とし、低燃焼量領域におけ
る燃焼安定性を向上させて、ＴＤＲを拡大することも可
能となる。That is, by making two planar catalyst bodies face each other and forming a mixture path between the catalyst bodies, it is possible to reduce the size of the catalytic combustion device and to make the upstream side of the catalyst body more compact. It is also possible to increase the TDR by improving the combustion stability in the low combustion amount region by setting the region as a heat retaining region.
【００３０】２枚の触媒体の間の混合気経路に、被加熱
流体を入れた熱交換部を有する輻射受熱体を触媒体に対
面して設けることにより、高燃焼量領域において、触媒
体の上流側表面温度を低減して耐熱限界温度以下に抑制
し、高負荷タイプの熱交換一体型触媒燃焼器を実現する
ことができる。By providing a radiant heat receiver having a heat exchange section containing a fluid to be heated facing the catalyst body in a mixture path between the two catalyst bodies, the catalyst body is provided in a high combustion amount region. The surface temperature on the upstream side is reduced to a temperature lower than the heat-resistant limit temperature, and a high-load-type heat exchange integrated catalytic combustor can be realized.
【００３１】混合気経路に、輻射受熱板を触媒体に対面
して設けることにより、機器構成を簡素化し、低コスト
化を図れるとともに、液体燃料を使用した場合にタール
等の生成を防止することができる。By providing a radiant heat receiving plate in the air-fuel mixture path so as to face the catalyst body, it is possible to simplify the equipment configuration and reduce the cost, and to prevent the generation of tar and the like when a liquid fuel is used. Can be.
【００３２】混合気経路に、被加熱流体を入れた熱交換
部を外部から間接加熱する熱媒体を封入した輻射間接受
熱体を触媒体に対面して設けることにより、均一加熱を
実現できるため、被加熱流体を局部的に過熱することが
なく、機器として、信頼性を高めることが可能となる。By providing a radiant indirect heat receiving body in which a heat medium for indirectly heating the heat exchange section containing the fluid to be heated from the outside in the air-fuel mixture path facing the catalyst body, uniform heating can be realized. In addition, the fluid to be heated is not locally heated, and the reliability of the device can be improved.
【００３３】輻射受熱体等の上流側に電気ヒータを設
け、燃焼開始時に電気ヒータに通電し、燃焼用空気を流
入して触媒体を加熱した後、電気ヒータへの通電を停止
し、燃料を供給して触媒燃焼を開始することにより、触
媒体を対流熱伝達により、均一に予熱できるとともに、
ＮＯｘの発生がなく、立ち上げ時の制御も容易となる。An electric heater is provided on the upstream side of the radiant heat receiver or the like. The electric heater is energized at the start of combustion, the combustion air flows in to heat the catalyst, and the energization of the electric heater is stopped. By supplying and starting catalytic combustion, the catalyst body can be uniformly preheated by convective heat transfer,
There is no generation of NOx, and control during startup is also easy.
【図１】本発明の実施の形態１の触媒燃焼装置の断面図FIG. 1 is a sectional view of a catalytic combustion device according to a first embodiment of the present invention.
【図２】本発明の実施の形態２の触媒燃焼装置の断面図FIG. 2 is a sectional view of a catalytic combustion device according to a second embodiment of the present invention.
【図３】本発明の実施の形態３の触媒燃焼装置の断面図FIG. 3 is a sectional view of a catalytic combustion device according to a third embodiment of the present invention.
【図４】本発明の実施の形態４の触媒燃焼装置の断面図FIG. 4 is a sectional view of a catalytic combustion device according to a fourth embodiment of the present invention.
１ 触媒体 ５ 輻射受熱体 ６ 整流部 ７ 混合気経路 ８ 排気熱交換体 １４ 輻射受熱板 １５ 熱媒体 １６ 輻射間接受熱体 １７ 触媒体予熱用電気ヒータ DESCRIPTION OF SYMBOLS 1 Catalyst 5 Radiation heat receiving body 6 Rectifying part 7 Air-fuel mixture path 8 Exhaust heat exchanger 14 Radiation heat receiving plate 15 Heat medium 16 Radiation indirect heat receiving body 17 Electric heater for preheating catalyst
フロントページの続き (72)発明者 沼本 浩直 大阪府門真市大字門真1006番地 松下電器 産業株式会社内Continuation of front page (72) Inventor Hironao Numamoto 1006 Kadoma Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (9)
合ガス供給部の流れ方向下流側に、対向して設けられ
た、通気性を有する２枚の平面状の触媒体と、前記２枚
の触媒体の間に形成された混合気経路とを備えたことを
特徴とする触媒燃焼装置。1. A mixed gas supply section of fuel and air, two air-permeable planar catalyst bodies provided opposite to each other on the downstream side in the flow direction of the mixed gas supply section, and And a mixture passage formed between the catalyst bodies.
熱交換部を有する輻射受熱体が、前記触媒体に対面した
状態で設けられた請求項１記載の触媒燃焼装置。2. The catalytic combustion device according to claim 1, wherein a radiant heat receiving body having a heat exchange section containing a fluid to be heated is provided in the air-fuel mixture path so as to face the catalyst body.
が設けられた請求項２記載の触媒燃焼装置。3. The catalytic combustion device according to claim 2, wherein a rectifying section is provided upstream of the air-fuel mixture of the radiant heat receiver.
媒体に対面して設けられた請求項１記載の触媒燃焼装
置。4. The catalytic combustion device according to claim 1, wherein a radiant heat receiving plate is provided in the air-fuel mixture path so as to face the catalyst body.
流れる熱交換部を外部から間接加熱するための熱媒体を
封入した輻射間接受熱体が前記触媒体に対面して設けら
れた請求項１記載の触媒燃焼装置。5. A radiant indirect heat receiver, which encloses a heat medium for indirectly heating a heat exchange unit through which a fluid to be heated flows inside from outside, is provided in the air-fuel mixture path, facing the catalyst body. The catalytic combustion device according to claim 1.
射間接受熱体の受熱面側が高輻射材で被覆されている請
求項２、４、又は５記載の触媒燃焼装置。6. The catalytic combustion apparatus according to claim 2, wherein the heat receiving surface side of the radiation heat receiving body, the radiation heat receiving plate, or the radiation indirect heat receiving body is covered with a high radiation material.
射間接受熱体の上流側に電気ヒータが設けられ、燃焼開
始時に前記電気ヒータに通電し、燃焼用空気を流入して
２枚の平面状の触媒体を加熱した後、前記電気ヒータへ
の通電を停止し、燃料を供給して触媒燃焼を開始する請
求項２、４、又は５記載の触媒燃焼装置。7. An electric heater is provided on the upstream side of the radiant heat receiving body, the radiant heat receiving plate, or the radiant indirect heat receiving body. 6. The catalytic combustion device according to claim 2, wherein after heating the planar catalyst body, energization of the electric heater is stopped, and fuel is supplied to start catalytic combustion.
を介して排気熱交換体が設けられた請求項２、４、又は
５記載の触媒燃焼装置。8. The catalytic combustion apparatus according to claim 2, wherein an exhaust heat exchanger is provided outside the two planar catalyst bodies via an exhaust path.
られ、前記排気熱交換体の内面側が高輻射材で被覆され
ている請求項８記載の触媒燃焼装置。9. The catalytic combustion device according to claim 8, wherein a protrusion is provided on an inner surface of the exhaust heat exchanger, and an inner surface of the exhaust heat exchanger is covered with a high radiation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11409597A JP3779792B2 (en) | 1997-05-01 | 1997-05-01 | Catalytic combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11409597A JP3779792B2 (en) | 1997-05-01 | 1997-05-01 | Catalytic combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10300027A true JPH10300027A (en) | 1998-11-13 |
| JP3779792B2 JP3779792B2 (en) | 2006-05-31 |
Family
ID=14628993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11409597A Expired - Lifetime JP3779792B2 (en) | 1997-05-01 | 1997-05-01 | Catalytic combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3779792B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005274063A (en) * | 2004-03-25 | 2005-10-06 | Tokyo Gas Co Ltd | Catalyst combustion type fluid heating device |
| JP2013061135A (en) * | 2011-09-14 | 2013-04-04 | Tokyo Gas Co Ltd | Water heater |
| CN110887234A (en) * | 2018-09-07 | 2020-03-17 | 芜湖美的厨卫电器制造有限公司 | Combustor subassembly and water heater |
-
1997
- 1997-05-01 JP JP11409597A patent/JP3779792B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005274063A (en) * | 2004-03-25 | 2005-10-06 | Tokyo Gas Co Ltd | Catalyst combustion type fluid heating device |
| JP2013061135A (en) * | 2011-09-14 | 2013-04-04 | Tokyo Gas Co Ltd | Water heater |
| CN110887234A (en) * | 2018-09-07 | 2020-03-17 | 芜湖美的厨卫电器制造有限公司 | Combustor subassembly and water heater |
| CN110887234B (en) * | 2018-09-07 | 2024-04-16 | 芜湖美的厨卫电器制造有限公司 | Burner assembly and water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3779792B2 (en) | 2006-05-31 |
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