JPH01239302A - Catalytic combustion device - Google Patents
Catalytic combustion deviceInfo
- Publication number
- JPH01239302A JPH01239302A JP63064605A JP6460588A JPH01239302A JP H01239302 A JPH01239302 A JP H01239302A JP 63064605 A JP63064605 A JP 63064605A JP 6460588 A JP6460588 A JP 6460588A JP H01239302 A JPH01239302 A JP H01239302A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- combustion
- gas flow
- length
- catalytic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007084 catalytic combustion reaction Methods 0.000 title claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims description 58
- 238000002485 combustion reaction Methods 0.000 abstract description 28
- 239000000446 fuel Substances 0.000 abstract description 20
- 230000003197 catalytic effect Effects 0.000 abstract description 15
- 238000009826 distribution Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 60
- 239000000567 combustion gas Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- -1 heating equipment Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000012533 medium component Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910003450 rhodium oxide Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は接触燃焼装置に係り、特に石油精製プラン１〜
のオフガス処理や自動車排気ガスの浄化などに用いられ
る、触媒を介して反応させるに好適な接触燃焼装置に関
する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a catalytic combustion device, and particularly relates to oil refining plans 1 to 1.
The present invention relates to a catalytic combustion device suitable for causing a reaction via a catalyst, which is used for off-gas treatment of automobiles, purification of automobile exhaust gas, and the like.
近年、触媒を用いる接触燃焼法は、通常の気相燃焼に比
べて低温燃焼が可能で、排ガス中の窒素酸化物および一
酸化炭素等の発生量が少ないことから注目されている。In recent years, catalytic combustion methods using catalysts have attracted attention because they enable lower temperature combustion and generate less nitrogen oxides, carbon monoxide, etc. in exhaust gas than normal gas phase combustion.
接触燃焼法は、燃料資源の多様化および低公害燃焼の要
求に伴って、石油精製プラン１へ、製鉄所等のオフガス
処理、自動車排気ガスの浄化、加熱装置及びガスタービ
ンなどに利用されている。これらの接触燃焼に用いられ
ている触媒としては、白金、パラジウム及びロジウムな
どの貴金属類、または酸化第二鉄、酸化コバルト及び酸
化ニッケルなどの金属酸化物を担体に担持させたものが
あげられる。With the diversification of fuel resources and the demand for low-pollution combustion, the catalytic combustion method is being used in oil refining plan 1, off-gas treatment at steel plants, purification of automobile exhaust gas, heating equipment, gas turbines, etc. . Examples of catalysts used in these catalytic combustions include noble metals such as platinum, palladium, and rhodium, or metal oxides such as ferric oxide, cobalt oxide, and nickel oxide supported on a carrier.
第５図に従来の接触燃焼装置の一般的な構成が示される
。この装置は、燃料供給ライン５０および燃焼用空気供
給うイン６０に連結された燃料と空気の予熱バーナ１０
と、燃料と空気の混合器２０と、触媒燃焼器３０と、熱
利用機器４０とから構成されている。このような構成に
おいて、まず予熱バーナ１０に一部の燃料と空気が供給
されて燃焼され、その燃焼ガスにより触媒燃焼器３０内
の触媒ブロック３１が燃料の着火温度以上に加熱される
。その後、混合器２０に燃料供給ライン５０から主燃料
５１が、および燃焼用空気供給ライン６０から主燃料用
空気６１がそれぞれ供給され、予熱バーナ１０の燃焼ガ
スと混合され、これらの混合ガス７０が触媒燃焼器３０
に供給されて燃焼が開始される。触媒燃焼器３０で発生
した燃焼ガス７１は、後段の熱回収装置、加熱炉などの
熱利用機器４０で熱を回収された後、排ガス８０として
排出される。FIG. 5 shows a general configuration of a conventional catalytic combustion device. The device includes a fuel and air preheating burner 10 connected to a fuel supply line 50 and a combustion air supply inlet 60.
, a fuel/air mixer 20 , a catalytic combustor 30 , and a heat utilization device 40 . In such a configuration, some fuel and air are first supplied to the preheating burner 10 and burned, and the combustion gas heats the catalyst block 31 in the catalytic combustor 30 to a temperature higher than the ignition temperature of the fuel. After that, the main fuel 51 is supplied from the fuel supply line 50 to the mixer 20, and the main fuel air 61 is supplied from the combustion air supply line 60, respectively, and mixed with the combustion gas of the preheating burner 10, and these mixed gases 70 are Catalytic combustor 30
is supplied to start combustion. The combustion gas 71 generated in the catalytic combustor 30 is discharged as exhaust gas 80 after its heat is recovered by a heat utilization device 40 such as a heat recovery device or a heating furnace in a subsequent stage.
第６図に上記の触媒燃焼器３０の詳細と、第７図に触媒
ブロック３１が示される。触媒ブロック３１としては、
複数のガス流路３２の集合体からなるパラレルフロー型
のものが多く用いられており、セラミックスなどの触媒
担体を格子状に押し出し成形したものに触媒成分を担持
させた後、第６図に示されるように触媒燃焼器３０内の
混合ガス７０の流路に取付けられる。その上流に整流用
の多孔板９０が断熱材１００に固定され、下流に処理ガ
ス流（燃焼ガス）７１が流れる。触媒ブロック３１が燃
料の着火温度以上に昇温された後、ガス流路３２に燃料
と空気の混合ガス７０が導入されると、入口部より燃焼
反応が開始する。このパラレルフロー型触媒ブロック３
１の特徴は、他の粒状または板状形式の触媒に比較して
、流動抵抗が小さく、被処理ガス７１を流すための動力
が少なくてすむことにある。そして、触媒燃焼器３０が
安定な燃焼を維持すると予熱バーナ１０を消火状態にし
、燃焼量を下げた状態で燃焼させる。FIG. 6 shows details of the catalytic combustor 30, and FIG. 7 shows the catalyst block 31. As the catalyst block 31,
A parallel flow type device consisting of an aggregate of a plurality of gas flow channels 32 is often used, and after the catalyst component is supported on a catalyst carrier such as ceramics extruded into a lattice shape, as shown in FIG. It is attached to the flow path of the mixed gas 70 in the catalytic combustor 30 so that the A perforated plate 90 for rectification is fixed to a heat insulating material 100 upstream thereof, and a process gas flow (combustion gas) 71 flows downstream. When the mixed gas 70 of fuel and air is introduced into the gas flow path 32 after the temperature of the catalyst block 31 is raised to the ignition temperature of the fuel or higher, a combustion reaction starts from the inlet. This parallel flow type catalyst block 3
The feature of No. 1 is that the flow resistance is lower than that of other granular or plate-shaped catalysts, and less power is required to flow the gas 71 to be treated. Then, when the catalytic combustor 30 maintains stable combustion, the preheating burner 10 is put into the extinguished state, and combustion is performed with the combustion amount reduced.
ところで、触媒ブロック３１内で安定した燃焼を継続す
るためには、燃焼と空気の混合が均一で、かつその混合
ガス７０の流斌分布が均一であると共に着火温度以上の
温度を維持する必要がある。By the way, in order to continue stable combustion within the catalyst block 31, it is necessary to ensure that the combustion and air are mixed uniformly, that the flow distribution of the mixed gas 70 is uniform, and that the temperature is maintained at or above the ignition temperature. be.
しかしながら、従来のパラレルフロー型触媒ブロックを
用いた接触燃焼装置は、第８図に触媒出口面の温度分布
の一例が示されるように、触媒ブロックの中央付近は外
周周辺に比較し、高温になっている。これは第９図に混
合ガス７０の速度７分布が示されるように、外壁（断熱
材）１００の冷涼抵抗によってガス流路のガス流速Ｖが
外壁（断熱材）１００近傍で遅く、中央付近では、はぼ
均一であるため外壁近くで単位体積当りに燃焼する燃料
量が中央付近で燃焼する燃料量に比較し少ないことに起
因するものである。従って、下流側の触媒ブロックの中
央付近に燃料量が多く流れて高ＵＨとなり、外壁近（で
は低！Ｌとなる。この温度差が大きいとき中央付近で担
体がシンタリングを起して表面積が減少し、担持されて
いる触媒成分も誘引されて触媒の活性が失われる他、触
媒成分が酸化され揮散されるため燃焼反応速度が低下し
、燃焼効率が低下する。また、外壁近くでは温度が低い
ため未燃焼物である一酸化炭素（Ｃｏ）。However, in a conventional catalytic combustion device using a parallel flow type catalyst block, the temperature near the center of the catalyst block is higher than that around the outer periphery, as shown in Figure 8, which shows an example of the temperature distribution on the catalyst outlet surface. ing. This is because, as shown in the velocity distribution of the mixed gas 70 in FIG. 9, the gas flow velocity V in the gas flow path is slow near the outer wall (insulating material) 100 due to the cooling resistance of the outer wall (insulating material) 100, and near the center. This is because the amount of fuel combusted per unit volume near the outer wall is smaller than the amount of fuel combusted near the center because the surface area is almost uniform. Therefore, a large amount of fuel flows near the center of the catalyst block on the downstream side, resulting in a high UH, and near the outer wall (low! In addition to attracting supported catalyst components and losing catalyst activity, the catalyst components are oxidized and volatilized, reducing the combustion reaction rate and reducing combustion efficiency.In addition, the temperature near the outer wall decreases. Carbon monoxide (Co) is an unburned substance due to its low temperature.
水素（Ｈ２）あるいは炭化水素系化合物が生成し、燃焼
効率の低下を招くことになる。Hydrogen (H2) or hydrocarbon compounds are generated, leading to a decrease in combustion efficiency.
従来の接触燃焼装置にあっては、触媒ブロックの外周周
辺のガス流速が中央付近より低いことに原因して温度が
低く、未燃焼物を生成するとともに燃焼効率が低下し、
触媒ブロックの中央付近は高温になって触媒機能が低下
する問題点があった。In conventional catalytic combustion devices, the gas flow velocity around the outer periphery of the catalyst block is lower than that around the center, resulting in low temperatures, which generates unburned substances and reduces combustion efficiency.
There was a problem in that the temperature near the center of the catalyst block became high and the catalyst function deteriorated.
本発明の目的は、安定した接触燃焼が維持できて燃焼効
率の高い接触燃焼装置を提供することにある。An object of the present invention is to provide a catalytic combustion device that can maintain stable catalytic combustion and has high combustion efficiency.
前記の目的を達成するため１本発明に係る接触燃焼装置
は、ガスの流れに対して平行に複数のガス流路を有する
パラレルフロー型の触媒ブロックを設置した触媒燃焼装
置において、触媒ブロックの外周周辺のガス流路の長さ
が中央付近のガス流路の長さより短く構成する。In order to achieve the above object, the present invention provides a catalytic combustion device in which a parallel flow type catalyst block having a plurality of gas flow paths parallel to the gas flow is installed. The length of the peripheral gas flow path is configured to be shorter than the length of the gas flow path near the center.
また、複数個の触媒ブロックを並設した触媒燃焼装置に
おいて、外周周辺に設置した触媒ブロックのガス流路の
長さが中央付近に設置した触媒ブロックのガス流路の長
さより短く構成する。Further, in a catalytic combustion device in which a plurality of catalyst blocks are arranged side by side, the length of the gas flow path of the catalyst blocks installed around the outer periphery is configured to be shorter than the length of the gas flow path of the catalyst blocks installed near the center.
本発明によれば、接／ｌｌｌ１燃焼装置に設置される触
媒ブロックは、その外周周辺のガス流路の長さが中央付
近の長さより短くガス流路の抵抗が少ない。According to the present invention, in the catalyst block installed in the direct combustion apparatus, the length of the gas flow path around the outer periphery is shorter than the length around the center, and the resistance of the gas flow path is small.
一方、触媒ブロックに流入する前の上流側の混合ガスの
速度分布は、流路の外壁（断熱材）近傍では遅く中央付
近では早くなってほぼ均一である。On the other hand, the velocity distribution of the mixed gas on the upstream side before flowing into the catalyst block is slow near the outer wall (insulating material) of the flow path and fast near the center, and is almost uniform.
そこで触媒ブロックに流入する時は、触媒ブロックの外
周周辺の抵抗が少ないために、中央付近のガスが多く流
入し、触媒ブロック内の中央付近のガス量が減少するこ
とにより触媒ブロック内のガスの速度分布はほぼ均一に
なる。Therefore, when flowing into the catalyst block, since there is less resistance around the outer periphery of the catalyst block, more gas flows in around the center, and the amount of gas around the center inside the catalyst block decreases, causing the gas inside the catalyst block to increase. The velocity distribution becomes almost uniform.
本発明の一実施例を第１図〜第４図を参照しながら説明
する。An embodiment of the present invention will be described with reference to FIGS. 1 to 4.
第１−図に示されるように、ガス（混合ガス）７０の流
れに対して平行に複数のガス流路３２を有するパラレル
フロー型の触媒ブロック３１を設置した触媒燃焼装置に
おいて、触媒ブロック３１の外周周辺のガス流路の長さ
し、が中央付近のガス流路の長さＬ２より短いように構
成されている。As shown in FIG. 1, in a catalytic combustion apparatus in which a parallel flow type catalyst block 31 having a plurality of gas flow paths 32 is installed in parallel to the flow of a gas (mixed gas) 70, the catalyst block 31 is The length of the gas flow path around the outer periphery is shorter than the length L2 of the gas flow path near the center.
触媒ブロック３１は第５図及び第６図に示されるように
、触媒燃焼器３０に内蔵され、予熱バーナ１０によって
燃料の着火温度以上に加熱された後、燃料５１と燃焼用
空気６１とが混合器２ｏで混合した混合ガス７０を燃焼
する。As shown in FIGS. 5 and 6, the catalyst block 31 is built into the catalytic combustor 30, and after being heated to a temperature equal to or higher than the ignition temperature of the fuel by the preheating burner 10, the fuel 51 and combustion air 61 are mixed. The mixed gas 70 mixed in the vessel 2o is combusted.
本実施例による触媒燃焼装置は、外周周辺の触媒ブロッ
ク内ガス流路の長さが短いため、摩擦抵抗は、触媒ブロ
ックの中央付近の摩擦抵抗に比較し小さくなる。一方、
触媒ブロック内に流入するガス上流側の速度分布は、第
９図に示されるように、外壁近傍では遅く、中央付近で
は早くほぼ均一な分布となっている。従って、触媒ブロ
ックに流入するガスとしては、摩擦抵抗が小さい部分に
は−に流側のガス流速が高い部分のガスが、摩擦抵抗が
大きい部分には」二流側のガス流速が低い部分のガスが
流れるようになる。その結果、Ｍ媒ブロック内に流入し
たガス流速（ガスｊ＃、）はほぼ均一になり、燃焼によ
る温度分布も一様に均しくなる。In the catalytic combustion device according to this embodiment, since the length of the gas flow path in the catalyst block around the outer periphery is short, the frictional resistance is smaller than the frictional resistance near the center of the catalyst block. on the other hand,
As shown in FIG. 9, the velocity distribution of the gas flowing into the catalyst block on the upstream side is slow near the outer wall, fast near the center, and has a substantially uniform distribution. Therefore, as for the gas flowing into the catalyst block, the gas from the part where the gas flow velocity on the downstream side is high is in the area where the frictional resistance is small, and the gas in the part where the gas flow rate is low on the downstream side is in the area where the frictional resistance is large. starts to flow. As a result, the gas flow rate (gas j#,) flowing into the M medium block becomes substantially uniform, and the temperature distribution due to combustion also becomes uniform.
そのため、触媒ブロックの中央部も外周周辺も同一の温
度となるため、中央部でシンタリングを起こすこともな
く、融媒成分が揮散されることもない。更に、外周周辺
の温度が上昇できるため、Ｃ○等の未燃分の発生もなく
なり燃焼効率を高めることができる。そして均一燃焼で
燃焼速度が低下しないため、触媒ブロックの高い活性を
維持することができる。Therefore, the temperature at the center and around the outer periphery of the catalyst block is the same, so that sintering does not occur in the center and the melting medium component is not volatilized. Furthermore, since the temperature around the outer periphery can be increased, the generation of unburned substances such as C○ can be eliminated, and the combustion efficiency can be increased. Furthermore, since the combustion rate does not decrease due to uniform combustion, the high activity of the catalyst block can be maintained.
本発明の他の実施例が第２図に示される。本実施例は、
第１図よりも触媒ブロック内のガス流路長さの変化をな
めらかにしたものであり、触媒ブロック内に流入する燃
料と空気の混合ガスの流量分布は第１１図よりも更に均
一にすることができる。Another embodiment of the invention is shown in FIG. In this example,
The change in the length of the gas flow path inside the catalyst block is made smoother than in Figure 1, and the flow rate distribution of the mixed gas of fuel and air flowing into the catalyst block is made more uniform than in Figure 11. Can be done.
さらに、本発明の他の実施例が第３図に示される。大型
の装置では、′ｆＳｔ数の触媒ブロックを組合せて１ケ
の大きなブロック群を製作するが、その時のブロック群
構成を示すもので、外周周辺に設置された触媒ブロック
のガス流路の長さが中央部分の触媒ブロックに比較し、
短い触媒ブロックで形成されたものである。Additionally, another embodiment of the invention is shown in FIG. In large-scale equipment, one large block group is manufactured by combining ``fSt number of catalyst blocks. This shows the block group configuration at that time. compared to the central catalyst block,
It is made up of short catalyst blocks.
なお、本実施例では、燃料と空気との混合ガスが流入す
る側で触媒ブロックのガス流路の長さを短くしたもので
あるが、燃焼ガスの出口側にガス流路の長さを短くして
も外周周辺のガス流路の抵抗を小さくする効果は同一で
あるため、本発明の効果は変化しない。In this example, the length of the gas flow path of the catalyst block is shortened on the side where the mixed gas of fuel and air flows in, but the length of the gas flow path is shortened on the exit side of the combustion gas. However, since the effect of reducing the resistance of the gas flow path around the outer periphery is the same, the effect of the present invention does not change.
また触媒ブロックの担体は一般に熱伝導率の低いセラミ
ックスで製作されるが、このＮＩ媒ジブロックその側面
で支持する場合、一般には触媒ブロックの担体よりも熱
伝導率が高い金属が用いられる。この場合、触媒ブロッ
クの側面より熱伝導によって移動する熱量が大きいため
、触媒ブロックに流入するガス流速が一定であっても、
その側面（外周周辺）の温度は低い。この場合は、第４
図に示されるように、流速分布を均一にするよりはむし
ろ側面部分に多くの燃料を供給する方が未燃分の発生を
抑制し、がっ、全体の温度を均一に低下できるので燃焼
効率を向上することができる。Further, the carrier of the catalyst block is generally made of ceramic with low thermal conductivity, but when supporting this NI medium diblock on its side, a metal having higher thermal conductivity than the carrier of the catalyst block is generally used. In this case, the amount of heat transferred from the side of the catalyst block by heat conduction is large, so even if the gas flow rate flowing into the catalyst block is constant,
The temperature of the side surface (around the outer periphery) is low. In this case, the fourth
As shown in the figure, rather than making the flow velocity distribution uniform, it is better to supply more fuel to the side portions because it suppresses the generation of unburned particles and lowers the overall temperature uniformly, making combustion more efficient. can be improved.
本発明によれば、触媒燃焼装置のＭｉ媒ジブロック外周
周辺のガス流路の長さを中央付近より短かくすることに
よって、触媒ブロックに混合ガスを均−供給できるため
、均一の温度の燃焼ができて燃焼効率が向上するととも
に、触媒ブロックの高い活性を維持できる。According to the present invention, by making the length of the gas flow path around the outer periphery of the Mi medium diblock of the catalytic combustion device shorter than that near the center, the mixed gas can be uniformly supplied to the catalytic block, resulting in combustion at a uniform temperature. This improves combustion efficiency and maintains high activity of the catalyst block.
第１図は本発明の一実施例を示す斜視図、第２図〜第４
図は本発明の他の実施例を示す斜視図、第５図は従来の
技術を示すフローチャート、第６図は従来の技術を示す
断面図、第７図は従来の技術を示す斜視図、第８図及び
第９図は従来の技術の作用を説明する図面である。
３１・・触媒ブロック、３２・・・ガス流路、７０・・
・ガス（混合ガス）、
Ｌｌ、 Ｌ２・・・ガス流路の長さ。FIG. 1 is a perspective view showing one embodiment of the present invention, and FIGS.
5 is a flowchart showing a conventional technique, FIG. 6 is a sectional view showing a conventional technique, FIG. 7 is a perspective view showing a conventional technique, and FIG. 8 and 9 are drawings for explaining the operation of the conventional technology. 31... Catalyst block, 32... Gas flow path, 70...
・Gas (mixed gas), Ll, L2... Length of gas flow path.
Claims (1)
パラレルフロー型の触媒ブロックを設置した接触燃焼装
置において、前記触媒ブロックの外周周辺の前記ガス流
路の長さが中央付近の該ガス流路の長さより短いことを
特徴とする接触燃焼装置。 ２、ガスの流れに対して平行に複数のガス流路を有する
パラレルフロー型の触媒ブロックを複数個並設した接触
燃焼装置において、外周周辺に設置した前記触媒ブロッ
クの前記ガス流路の長さが中央付近に設置した前記触媒
ブロックのガス流路の長さより短いことを特徴とする接
触燃焼装置。[Claims] 1. In a catalytic combustion device in which a parallel flow type catalyst block having a plurality of gas flow paths parallel to the gas flow is installed, the length of the gas flow path around the outer periphery of the catalyst block. A catalytic combustion device characterized in that the length of the gas flow path is shorter than the length of the gas flow path near the center. 2. In a catalytic combustion device in which a plurality of parallel flow type catalyst blocks having a plurality of gas flow paths parallel to the gas flow are arranged in parallel, the length of the gas flow path of the catalyst block installed around the outer periphery is shorter than the length of the gas flow path of the catalyst block installed near the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63064605A JPH01239302A (en) | 1988-03-17 | 1988-03-17 | Catalytic combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63064605A JPH01239302A (en) | 1988-03-17 | 1988-03-17 | Catalytic combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01239302A true JPH01239302A (en) | 1989-09-25 |
Family
ID=13263056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63064605A Pending JPH01239302A (en) | 1988-03-17 | 1988-03-17 | Catalytic combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01239302A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205712A3 (en) * | 2000-11-14 | 2002-07-24 | General Electric Company | Catalytic combustor flow conditioner and method for providing uniform gas velocity distribution |
-
1988
- 1988-03-17 JP JP63064605A patent/JPH01239302A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205712A3 (en) * | 2000-11-14 | 2002-07-24 | General Electric Company | Catalytic combustor flow conditioner and method for providing uniform gas velocity distribution |
| US6460345B1 (en) | 2000-11-14 | 2002-10-08 | General Electric Company | Catalytic combustor flow conditioner and method for providing uniform gasvelocity distribution |
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