JPS6246116A - Method of contact combusting for carbon monoxide and hydrogen containing gas and equipment thereof - Google Patents
Method of contact combusting for carbon monoxide and hydrogen containing gas and equipment thereofInfo
- Publication number
- JPS6246116A JPS6246116A JP60185578A JP18557885A JPS6246116A JP S6246116 A JPS6246116 A JP S6246116A JP 60185578 A JP60185578 A JP 60185578A JP 18557885 A JP18557885 A JP 18557885A JP S6246116 A JPS6246116 A JP S6246116A
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- Prior art keywords
- gas
- air
- catalyst
- flow path
- temperature
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Incineration Of Waste (AREA)
- Gas Burners (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は一酸化炭素（ＣＯ）および水素（Ｈ２）含有ガ
スの接触燃焼方法および装置に係り、特に低温度より燃
焼を開始せしめるに好適な燃焼方法および装置に関する
ものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method and apparatus for catalytic combustion of gas containing carbon monoxide (CO) and hydrogen (H2), and is particularly suitable for starting combustion at a low temperature. The present invention relates to combustion methods and devices.
（従来の技術）
近年、種々の産業分野で省エネルギー化が進められてお
り、特に低発熱量の産業排ガスを燃焼させ、熱として回
収利用する方法が精力的に実施されようとしている。し
かし、これら低発熱量産業排ガスの多くは自燃しないが
、あるいは完全燃焼させることが困難である。このため
、助熱バーナにより温度を高めたり、高発熱量燃料を混
合したりする方法が採用されてきた。(Prior Art) In recent years, energy conservation has been promoted in various industrial fields, and in particular, methods of burning industrial exhaust gas with a low calorific value and recovering and utilizing it as heat are being actively implemented. However, many of these low calorific value industrial exhaust gases do not self-combust or are difficult to completely combust. For this reason, methods have been adopted in which the temperature is raised using an auxiliary burner or a high calorific value fuel is mixed.
これに対し、触媒を用いて接触燃焼を行わせると、上記
した低発熱量のガスも完全燃焼させることが可能となる
。このため、最近では、自燃不可能なガスや、完全燃焼
させるには熱量が不足しているガスを触媒を用いて燃焼
させる研究、発明が盛んに行われている。触媒を用いた
燃焼（以下、触媒燃焼という）は、上記した低発熱量ガ
スの燃焼が可能であるばかりでな（、次のような特徴を
も有するものである。On the other hand, when catalytic combustion is performed using a catalyst, it becomes possible to completely burn the above-described low calorific value gas. For this reason, in recent years, research and inventions have been actively conducted to use catalysts to combust gases that cannot self-combust or gases that do not have sufficient heat for complete combustion. Combustion using a catalyst (hereinafter referred to as catalytic combustion) not only enables the combustion of the above-mentioned low calorific value gas (but also has the following characteristics).
（１）低酸素燃焼が可能である。(1) Low oxygen combustion is possible.
（２）触媒作用のためコンパクトな燃焼器にできる。(2) Due to the catalytic action, the combustor can be made compact.
（３）低ＮＯｘ燃焼が可能である。(3) Low NOx combustion is possible.
このため、高炉ガス（ＢＦＧ）、転炉ガス（ＬＤＧ）、
コークス炉ガス（ＣＯＧ） 、石炭ガス化ガス、都市ガ
ス、アクリロニトリルプラント排ガス、燃料電池のリホ
ーマ用熱源とする炭化水素改質ガスなどの燃焼へ触媒を
用いた、いわゆる触媒燃焼が通用されようとしている。For this reason, blast furnace gas (BFG), converter gas (LDG),
So-called catalytic combustion, which uses a catalyst to burn coke oven gas (COG), coal gasification gas, city gas, acrylonitrile plant exhaust gas, and reformed hydrocarbon gas as a heat source for reforming fuel cells, is coming into use. .
第９図は、上記の触媒燃焼の基本フローを示す図である
。この図では、燃焼熱で空気を予熱するなどの糸路は省
略されている。図において、空気と燃料は、予熱器７で
予熱された後、触媒１０が充填されている触媒燃焼器９
に入り、燃焼した後、排ガスは流路１１から排出される
。この図から明らかなように、触媒燃焼では、触媒燃焼
器９に入る前に燃料と空気とを予め混合し、かつ燃料と
触媒の種類などで決まる燃焼開始温度（以下、着火温度
という）以上に予熱しておくことが必要である。このた
め、着火温度が高いと、予熱器が大型化し実用上大きな
問題となる。FIG. 9 is a diagram showing the basic flow of the above catalytic combustion. In this figure, the yarn path that preheats the air with combustion heat is omitted. In the figure, air and fuel are preheated in a preheater 7 and then transferred to a catalytic combustor 9 filled with a catalyst 10.
After entering and being combusted, the exhaust gas is discharged through the flow path 11. As is clear from this figure, in catalytic combustion, fuel and air are mixed in advance before entering the catalytic combustor 9, and the temperature is higher than the combustion start temperature (hereinafter referred to as ignition temperature) determined by the types of fuel and catalyst. It is necessary to preheat it. For this reason, if the ignition temperature is high, the preheater becomes large, which poses a serious problem in practice.
前記したＢＦＧ （高炉ガス）をはじめとする燃料中に
は、一酸化炭素（ＣＯ）と水素（Ｈ２）の両者が存在し
ている。燃焼用触媒として一般に用いられる貴金属触媒
の場合には、水素のみを燃焼させる時の着火温度は常温
〜７０℃である。従ってＣＯとＨ２の両者を含有する上
記ＢＦＧ等のガスの着火温度は、水素のそれに近いこと
が予想される。しかしながら、ＣＯとＨ２が共存すると
着火温度はＣＯの着火温度と大差なく２００〜３００℃
と高い値になり、このため予熱器を大型化せざるを得な
いという問題があった。Both carbon monoxide (CO) and hydrogen (H2) are present in fuels including the above-mentioned BFG (blast furnace gas). In the case of a noble metal catalyst commonly used as a combustion catalyst, the ignition temperature when only hydrogen is combusted is room temperature to 70°C. Therefore, the ignition temperature of a gas such as the above-mentioned BFG containing both CO and H2 is expected to be close to that of hydrogen. However, when CO and H2 coexist, the ignition temperature is 200-300℃, not much different from the ignition temperature of CO.
Therefore, there was a problem in that the preheater had to be made larger.
（発明が解決しようとする問題点）
本発明の目的は、上記した従来技術の欠点をなくし、一
酸化炭素（ＣＯ）と水素（Ｈ２）とを含有する燃料を低
温で着火させるに好適な一酸化炭素および水素含有ガス
の接触燃焼方法および装置を提供することにある。(Problems to be Solved by the Invention) An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a method suitable for igniting fuel containing carbon monoxide (CO) and hydrogen (H2) at low temperatures. An object of the present invention is to provide a method and apparatus for catalytic combustion of carbon oxide and hydrogen-containing gas.
（問題点を解決するための手段）
本発明者らは、ＣＯとＨ２を共合する燃料の着火機構に
ついて研究した結果、次のような結論に到達した。すな
わち、白金（Ｐｔ）、パラジウム（Ｐｄ）、ロジウム（
Ｒｈ）などの貴金属を活性成分とする触媒の場合には、
ＣＯのそれら触媒上への吸着力が、Ｈ２の吸着力に比べ
て強く、ＣＯとＨ２が燃料として同時に触媒に接触する
と触媒上にはＣＯが選択的に吸着してしまい、Ｈ２が吸
着できな（なる。このため、着火温度の低いＨ２が存在
するにもかかわらず、Ｈ２とＣＯの混合ガスの着火温度
はＣＯの着火温度と大差のない高い値を示すと考えられ
た。(Means for Solving the Problems) The present inventors have studied the ignition mechanism of fuel that combines CO and H2, and have reached the following conclusion. That is, platinum (Pt), palladium (Pd), rhodium (
In the case of catalysts containing noble metals such as Rh) as active components,
The adsorption power of CO on these catalysts is stronger than that of H2, and if CO and H2 contact the catalyst simultaneously as fuel, CO will be selectively adsorbed on the catalyst, and H2 will not be able to be adsorbed. (For this reason, despite the presence of H2 with a low ignition temperature, the ignition temperature of a mixed gas of H2 and CO was considered to be a high value that was not much different from the ignition temperature of CO.
要するに本発明は、ＣＯとＨ２を含有するガスが触媒と
接触する前の短時間の間、Ｈ２と空気とを先に導入する
ことにより、着火温度を大幅に低下せしめる方法、およ
びその原理を利用した装置、すなわち触媒燃焼器の燃料
または燃料と空気の供給ラインに、ＣＯの吸収剤または
吸着剤の充填塔を設け、これにより着火時の短時間の間
、燃料中のＣＯのみを除去、またはその流出を遅らせる
ことにより、着火温度を低下しようとするものである。In short, the present invention utilizes a method and principle of significantly lowering the ignition temperature by first introducing H2 and air for a short period of time before the gas containing CO and H2 contacts the catalyst. A CO absorbent or adsorbent packed column is installed in the fuel or fuel and air supply line of the catalytic combustor, which removes only the CO in the fuel for a short period of time at the time of ignition, or By delaying its outflow, the ignition temperature is lowered.
すわなち、本発明の第１は、一酸化炭素（Ｃ０）および
水素Ｈ２含有ガスを触媒を用いて接触的に燃焼させる方
法において、該ガスと空気との混合ガスが触媒と接触す
る前の一定時間、Ｈ２と空気の混合ガスを触媒と接触さ
せることを特徴とする。That is, the first aspect of the present invention is a method of catalytically burning a gas containing carbon monoxide (C0) and hydrogen H2 using a catalyst, in which a mixed gas of the gas and air comes into contact with the catalyst. It is characterized by bringing a mixed gas of H2 and air into contact with a catalyst for a certain period of time.
本発明の第２は、ＣＯおよびＨ２含有ガスの流路および
空気の流路からＣ０１Ｈ２および空気を合流させ、触媒
燃焼器の触媒層へ供給して接触燃焼させる接触燃焼装置
において、ＣＯおよびＨ２含有ガスの流路に切替可能な
バイパス流路を設け、該バイパス流路にＣＯ除去装置を
設けたことを特徴とする。The second aspect of the present invention is a catalytic combustion device that combines CO1H2 and air from a CO and H2 containing gas flow path and an air flow path, and supplies the CO and H2 containing gas to a catalyst layer of a catalytic combustor for catalytic combustion. The present invention is characterized in that a switchable bypass flow path is provided in the gas flow path, and a CO removal device is provided in the bypass flow path.
本発明の第３は、ＣＯおよびＨ２含有ガスの流路および
空気の流路からＣＯ、Ｈ２および空気を合流させ、触媒
燃焼器の触媒層へ供給して接触燃焼させる接触燃焼装置
において、前記ＣＯおよびＨ２含有ガスと空気との合流
点と触媒燃焼器との間にＣＯ吸着塔を設けたことを特徴
とする。The third aspect of the present invention is a catalytic combustion device in which CO, H2, and air are combined from a CO and H2-containing gas flow path and an air flow path, and are supplied to a catalyst layer of a catalytic combustor for catalytic combustion. Also, a CO adsorption tower is provided between the confluence point of H2-containing gas and air and the catalytic combustor.
以下、本発明を図面に示す実施例により詳述する。Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.
（実施例）
実施例１
第１図は、本発明方法をＢＦＧの接触燃焼に通用する場
合の必要量、少限の機器を配した系統図である。起動に
当たっては、まず空気が流路１より流入し、予熱器７に
よって所定温度まで昇温され、流路８を経て触媒燃焼器
９に導入される。触媒燃焼ａ９に充填されている、貴金
属を活性成分とする触媒１０は、予熱された空気と接触
し、時間とともにガス温度に近づく。ここでまずバルブ
１３が開かれ、流路３．５および６を経てＨ２が空気と
混合され、上記した流れにより触媒１０に導かれて燃焼
が開始される。バルブ１３を開いた後、数秒から数分経
過後、バルブ１３を閉じると同時にバルブ１２を開放し
、流路２．４および６よりＢＦＧを空気中に注入する。(Example) Example 1 FIG. 1 is a system diagram showing the necessary amount and a small number of equipment when the method of the present invention is applied to catalytic combustion of BFG. At startup, air first flows in through the flow path 1, is heated to a predetermined temperature by the preheater 7, and is introduced into the catalytic combustor 9 via the flow path 8. The catalyst 10, which is filled in the catalytic combustion a9 and has a noble metal as an active component, comes into contact with the preheated air and approaches the gas temperature over time. First, the valve 13 is opened, H2 is mixed with air through the flow paths 3.5 and 6, and is guided to the catalyst 10 by the above-described flow to start combustion. After several seconds to several minutes have passed after opening the valve 13, the valve 13 is closed and at the same time the valve 12 is opened, and BFG is injected into the air through the channels 2.4 and 6.
空気とＢＦＧの混合ガスは予熱器７、流路８を経て触媒
１０と接触し燃焼される。第２図は、上記した操作によ
る場合の触媒１０と接触するガス中のＣＯおよびＨ２濃
度の経時変化例（実線）を示したものである。本例は、
バルブ１３を開放してＨ２を先行注入する時間を５秒と
し、先行Ｈ２濃度をＢＦＧにより導入されるＨ２濃度と
等しくなるようにした場合のものである。The mixed gas of air and BFG passes through the preheater 7 and the flow path 8, contacts the catalyst 10, and is combusted. FIG. 2 shows an example of changes over time (solid line) in the CO and H2 concentrations in the gas that comes into contact with the catalyst 10 in the case of the above-described operation. In this example,
This is a case where the time for opening the valve 13 and pre-injecting H2 is 5 seconds, and the pre-H2 concentration is made equal to the H2 concentration introduced by the BFG.
比較例１
第１図の装置の操作において、実施例１に示したバルブ
１３の開放操作によるＨ２の先行注入を行わず、触媒１
０の温度が所定温度に達したら直ちにバルブ１２を開放
してＢＦＧを注入した。この時、触媒１０と接するガス
中のＣＯおよびＨ２濃度の経時変化を第２図の破線で示
す。Comparative Example 1 In the operation of the apparatus shown in FIG. 1, the preliminary injection of H2 by opening the valve 13 shown in Example 1 was not performed,
As soon as the temperature of 0 reached a predetermined temperature, the valve 12 was opened and BFG was injected. At this time, changes over time in the CO and H2 concentrations in the gas in contact with the catalyst 10 are shown by broken lines in FIG.
実験例１
本発明の効果を明らかにするため、予熱器７の温度を変
化させて実施例１と比較例１の方法によって燃焼試験を
行った結果を第３図に示す。触媒には、ハニカム状Ｐｄ
担持Ｂ ａ Ａ １１２０１９触媒を用い、第１表に示
す条件で燃焼試験を行った。第３図の結果から、本発明
になるＨ２の先行注入操作により、燃焼開始温度を約１
８０℃低下せしめ得ることが判る。Experimental Example 1 In order to clarify the effects of the present invention, a combustion test was conducted using the methods of Example 1 and Comparative Example 1 while changing the temperature of the preheater 7. The results are shown in FIG. The catalyst is honeycomb-shaped Pd.
A combustion test was conducted using the supported B a A 112019 catalyst under the conditions shown in Table 1. From the results shown in FIG.
It can be seen that the temperature can be lowered by 80°C.
以下余白
第１表
■
実験例２および３
実験例１に用いた触媒中のＰｄに替えて、Ｐｔならびに
Ｒｈを担持した触媒を用い同様の試験を行い、着火温度
を調べた。その結果を第２表に実験例１の結果と合わせ
て示す０本表から、本発明の効果がＰｄのみならずＰｔ
、Ｒｈのごとき貴金属触媒に共通して発揮し得ることが
判る。Table 1 below (margin) Experimental Examples 2 and 3 A similar test was conducted using a catalyst supporting Pt and Rh instead of Pd in the catalyst used in Experimental Example 1, and the ignition temperature was investigated. The results are shown in Table 2 together with the results of Experimental Example 1. From this table, it is clear that the effect of the present invention is not limited to Pd but also Pt.
, Rh, and other noble metal catalysts.
実験例４
第１表に示したＨ２の先行時間（５秒）を１から１２０
秒の間で変化させて着火温度を測定した。Experimental example 4 The lead time (5 seconds) of H2 shown in Table 1 was changed from 1 to 120.
The ignition temperature was measured by varying the temperature between seconds.
その結果を第４図に示す。Ｈ２の先行注入による着火温
度の低下効果は１秒でも明確に現れており、先行させて
注入するＨ２の量は極めて少量でよいことがわかる。こ
のため、本発明の経済的な効果は大きい。The results are shown in FIG. The effect of lowering the ignition temperature by the advance injection of H2 is clearly visible even for 1 second, indicating that the amount of H2 to be injected in advance only needs to be extremely small. Therefore, the economical effects of the present invention are significant.
実験例５
実験例１のＨ２の先行注入濃度を０．１から１．６％の
間で変化させて着火温度を測定した。得られた結果を第
５図に示す。Ｈ２の先行注入濃度は、第２図に示したよ
うにＢＦＧ燃焼時と同一である必要はなく、０．１％程
度の稀薄なものであってもよいが、０．３％以上の方が
効果が著しい。Experimental Example 5 The ignition temperature was measured while changing the pre-injection concentration of H2 in Experimental Example 1 from 0.1 to 1.6%. The results obtained are shown in FIG. The pre-injection concentration of H2 does not need to be the same as that during BFG combustion as shown in Figure 2, and may be as dilute as 0.1%, but it is better to have a concentration of 0.3% or more. The effect is significant.
以上の実験例で示したように、Ｈ２を短時間、先行的に
注入することにより、ＣＯ含有ガスの着火温度を著しく
低下せしめることが可能である。As shown in the above experimental examples, by injecting H2 in advance for a short period of time, it is possible to significantly lower the ignition temperature of the CO-containing gas.
その場合、Ｈ２先行量が約１％濃度で数秒間という極め
て微量で、１５０℃以上の着火温度の低下を実現できる
ため、予熱器の簡略化が可能となり、コンパクトで経済
的にも優れた燃焼器を実現することができる。In that case, the ignition temperature can be lowered by more than 150°C with an extremely small amount of H2 preceding at a concentration of approximately 1% for several seconds, making it possible to simplify the preheater, resulting in compact and economically superior combustion. can be realized.
Ｈ２の先行注入量による触媒の温度上昇は１００℃程度
あり、先行注入時間が数ｓｅｃでは数ｌＯ℃である。こ
の温度上昇で１５０℃以上の着火温度の低下が可能であ
ることから、従来の低温着火燃料の使用により触媒を予
熱して着火せしめようとするものとは全く別の機構によ
る着火温度の低減効果が本発明にはあると推定される。The temperature rise of the catalyst due to the amount of advance injection of H2 is about 100° C., and is several 10° C. when the advance injection time is several seconds. Since this temperature increase can lower the ignition temperature by 150°C or more, the ignition temperature is reduced by a mechanism that is completely different from the conventional method of preheating the catalyst and igniting it by using low-temperature ignition fuel. It is presumed that the present invention includes.
実験例６
本発明の原理を応用した他の実験例を以下に示す。この
実験例では、水素リッチの条件下でのＨ２先行注入の効
果を見るために、燃料ガスとして水素濃度１．４％、Ｃ
Ｏ濃度０．１４％のガスを用いた。Experimental Example 6 Another experimental example applying the principle of the present invention is shown below. In this experimental example, in order to see the effect of pre-injection of H2 under hydrogen-rich conditions, we used a hydrogen concentration of 1.4% as fuel gas and a C
A gas with an O concentration of 0.14% was used.
具体的には、実施例１ （第１図）と同様の系統を有す
る装置を用い、流路３からは３秒間だけＨ２１，４％に
なるように注入した。その後Ｈ２の注入を中止すると同
時に流路２からＣｏＩＯ％、Ｈ２２０％のガスを導入し
、空気と混合後、触媒層入口流路でＨ：１．４％、ＣＯ
：０．７％となるように注入した。このときの触媒層１
０の出口流路８で測定した燃焼率と触媒層出口温度を第
６図に示す。Specifically, using an apparatus having the same system as in Example 1 (FIG. 1), H21.4% was injected from channel 3 for only 3 seconds. After that, the injection of H2 was stopped, and at the same time, gas containing CoIO% and 20% H2 was introduced from channel 2, and after mixing with air, H: 1.4%, CO
: Injected at a concentration of 0.7%. Catalyst layer 1 at this time
The combustion rate and catalyst layer outlet temperature measured in the outlet flow path 8 of 0 are shown in FIG.
比較例２
実験例６と同様の装置および燃料を用い、Ｈ２の先行注
入を行わず、同時にＣＯとＨ２をそれぞれ０．７％、１
．４％となるように注入した結果を第６図に合わせて示
した。Comparative Example 2 Using the same equipment and fuel as in Experimental Example 6, without pre-injecting H2, CO and H2 were simultaneously added at 0.7% and 1%, respectively.
．． The results of injection at a concentration of 4% are shown in FIG.
以上に示した実験例６と比較例２の結果、第６図かられ
かるように、燃料中のＨ２に比べ微量なＣＯが含有され
ていても、先行注入を行わなければ、着火温度はＣＯの
それによって決まるため、予熱温度を約２５０℃以上に
する必要がある。これに対し、Ｈ２を数秒間先行注入す
る本発明では約７０℃以下から着火せしめることが可能
であり、燃焼温度も２００℃と、低温を維持することが
できる。すなわち、ＣＯを燃料中に含有する場合には、
前述のようにＣＯが選択的に触媒に吸着されるため、Ｈ
２に比べＣＯ濃度が低い場合であっても、着火温度をＣ
Ｏのそれ以下にはできず、２５０℃以上の高温が必要で
ある。これに対し、本発明によるＨ２の先行注入法によ
れば、ＣＯの影響を軽減でき、極めて低温で着火および
燃焼を行うことができる。たとえば、第６図によれば、
従来法では２００℃以上に加熱しなければならなかった
ものが約７０℃で着火させ得るだけでなく、７０℃〜１
００℃で完全燃焼を持続せしめることができる。As can be seen from Figure 6, the results of Experimental Example 6 and Comparative Example 2 shown above show that even if the fuel contains a trace amount of CO compared to H2, the ignition temperature will be lower than that of CO2 without prior injection. Therefore, it is necessary to set the preheating temperature to about 250°C or higher. On the other hand, in the present invention, in which H2 is injected in advance for several seconds, it is possible to ignite at a temperature of about 70°C or lower, and the combustion temperature can also be maintained at a low temperature of 200°C. That is, when CO is contained in the fuel,
As mentioned above, since CO is selectively adsorbed on the catalyst, H
Even if the CO concentration is lower than 2, the ignition temperature can be lowered by C.
The temperature cannot be lower than that of O, and a high temperature of 250°C or higher is required. On the other hand, according to the pre-injection method of H2 according to the present invention, the influence of CO can be reduced and ignition and combustion can be performed at extremely low temperatures. For example, according to Figure 6,
In the conventional method, materials that had to be heated to over 200°C can be ignited at approximately 70°C, but can also be heated to temperatures between 70°C and 1°C.
Complete combustion can be sustained at 00°C.
実施例２
第７図は、本発明による接触燃焼の他の実施例を示す装
置系統図を示したもので、本例では、ＢＦＧ流路２にバ
イパスライン１０１を設け、そのラインにＣＯ吸収塔１
０６を設置し、起動時の短時間の間だけＢＦＧ中のＣＯ
を除去し、残存するＨ２ガスと空気とを触媒に接触させ
ることにより、Ｈ２先行注入と同様の効果を得るもので
ある。具体的には、起動時にバルブ１０４と１０５を開
放し、ＣＯ吸収塔１０６にＢＦＧが導かれＣＯのみを除
去する。残存するＨ２含有ガスは流路６を経て空気流路
１に注入される。一定時間経過後、バルブ１０４と１０
５を閉じると同時にバルブ１２を開放しＢＦＧガスが注
入される。Example 2 FIG. 7 shows an apparatus system diagram showing another example of catalytic combustion according to the present invention. In this example, a bypass line 101 is provided in the BFG flow path 2, and a CO absorption tower is connected to that line. 1
06 is installed and the CO in the BFG is removed for a short time at startup.
By removing the remaining H2 gas and bringing the air into contact with the catalyst, the same effect as the preceding H2 injection can be obtained. Specifically, upon startup, valves 104 and 105 are opened, and BFG is introduced into the CO absorption tower 106 to remove only CO. The remaining H2-containing gas is injected into the air channel 1 via the channel 6. After a certain period of time, valves 104 and 10
At the same time as the valve 5 is closed, the valve 12 is opened and BFG gas is injected.
本例におけるＣＯ吸収塔１０６には、塩化第一銅（Ｃｕ
Ｃβ）と塩化アルミニウム（Ａ Ｉ Ｃｌ ３）のトル
エン溶液、塩化第１銅のへキサメチルリン酸トリアミド
錯体などの公知のＣＯ吸収液、またはその担持物の充填
塔などを用いることができる。The CO absorption tower 106 in this example includes cuprous chloride (Cu
A toluene solution of Cβ) and aluminum chloride (A I Cl 3 ), a known CO absorption liquid such as a hexamethylphosphoric acid triamide complex of cuprous chloride, or a packed column of its support can be used.
実施例３ 実施例１と同じ効果を得る他の実施例を第８図に示す。Example 3 Another embodiment that achieves the same effect as the first embodiment is shown in FIG.
本例では、活性炭、ゼオライトなどの公知のＣＯ吸着剤
を充填したＣＯ吸着塔２０３を設け、起動時の一定時間
の間燃料中のＣＯを除去し、残存するＨ２と空気とが先
行して触媒に接触できるようにしたものである。起動に
当たって、ＢＦＧが流路２がら空気中に注入されたのち
、ＣＯ吸着塔２０３、予熱器７および触媒燃焼器９に順
次導かれるが、ＢＦＧ中に含有されていたＣＯはＣＯ吸
着塔２０３に充填されている前記吸着剤に吸着されるた
め、起動時の一定時間はＢＦＧ中のＨ２と空気のみが触
媒１０と接触する。これにより低温で着火された後、Ｃ
Ｏ吸着の破過が起こり、吸着塔２０３からＣＯが流出す
るようになる。それに伴って燃焼温度が上昇し、所定の
触媒燃焼が行われる。燃焼排ガスはバルブ１０６を閉じ
、バルブ１０６を開くことにより、ＣＯ吸着塔２０３の
前流に設けた熱交換器２０１を通り、これによりガス温
度が上昇し、吸着したＣＯが脱離され、次の起動時に再
びＣＯを吸着できるように再生される。In this example, a CO adsorption tower 203 filled with a known CO adsorbent such as activated carbon or zeolite is provided to remove CO from the fuel for a certain period of time at startup, and the remaining H2 and air are absorbed into the catalyst. This allows for contact with the public. At startup, BFG is injected into the air through the flow path 2, and then guided to the CO adsorption tower 203, the preheater 7, and the catalytic combustor 9 in order. Because they are adsorbed by the filled adsorbent, only H2 in the BFG and air come into contact with the catalyst 10 for a certain period of time during startup. After being ignited at a low temperature, C
Breakthrough of O adsorption occurs, and CO begins to flow out from the adsorption tower 203. Accordingly, the combustion temperature rises, and a predetermined catalytic combustion is performed. By closing the valve 106 and opening the valve 106, the combustion exhaust gas passes through the heat exchanger 201 installed upstream of the CO adsorption tower 203, thereby increasing the gas temperature and desorbing the adsorbed CO, which leads to the next generation. At startup, it is regenerated so that it can adsorb CO again.
（発明の効果）
本発明によれば、ＣＯとＨ２を含有するガスの着火温度
を例えば１５０℃以上低下させることができ、これによ
り、起動時の予熱装置をコンパクトにすると同時に、予
熱に必要なエネルギーを著しく低減することができる。(Effects of the Invention) According to the present invention, the ignition temperature of gas containing CO and H2 can be lowered by, for example, 150°C or more, thereby making the preheating device at the time of startup compact and at the same time reducing the ignition temperature required for preheating. Energy can be significantly reduced.
また本発明に必要な先行注入すべきＨ２の量は約１％濃
度、数秒〜数十秒と微量でよく、経済的にも優れたもの
となる。Further, the amount of H2 to be injected in advance necessary for the present invention may be as small as approximately 1% concentration and several seconds to several tens of seconds, making it economically advantageous.
さらに公知のＣＯ吸収あるいは吸着技術により、燃料ガ
ス中のＨ２を残しＣＯを起動時の短時間の間除去するこ
とにより、水素源を新たに設けることなく、着火温度の
低温化が可能になる。Further, by using known CO absorption or adsorption technology to remove CO for a short time during startup while leaving H2 in the fuel gas, it is possible to lower the ignition temperature without providing a new hydrogen source.
第１図は、本発明の一実施例を示す触媒燃焼方法の製造
系統図、第２図は、本発明の実施例と比較例における操
作結果を示す図、第３図は、本発明の実施例と比較例の
効果を比較して示す図、第４図、第５図は、本発明の実
施例における操作条件の影響を示す図、第６図は、本発
明の他の実施例の結果を示す図、第７図、第８図は、そ
れぞれ本発明の他の実施例を示す装置系統図、第９図は
、従来の触媒燃焼装置を示す系統図である。
７・・・予熱器、９・・・触媒燃焼器、１０・・・触媒
、１２．１３・・・バルブ、１０６・・・ＣＯ吸収塔、
２０１・・・熱交換器、２０３・・・ＣＯ吸着塔。
代理人 弁理士 川 北 武 長
７：予熱器
９：触媒燃焼器
１０：触媒
１２：バルブ
１３：バルブ
第２図
第３図
ガス予熱温度（Ｃ０）
第４図
Ｈ２先行時間 （Ｓｅｃ）
第５図
Ｈ２先行濃度 （’／、）
触媒層入口温度（０Ｃ）
第７図
第８図Fig. 1 is a production system diagram of a catalytic combustion method showing an embodiment of the present invention, Fig. 2 is a diagram showing operation results in an embodiment of the present invention and a comparative example, and Fig. 3 is a diagram showing the operation results of an embodiment of the present invention. Figures 4 and 5 are diagrams showing the effects of operating conditions in the examples of the present invention, and Figure 6 is the results of other examples of the present invention. , FIG. 7, and FIG. 8 are device system diagrams showing other embodiments of the present invention, and FIG. 9 is a system diagram showing a conventional catalytic combustion device. 7... Preheater, 9... Catalytic combustor, 10... Catalyst, 12.13... Valve, 106... CO absorption tower,
201... Heat exchanger, 203... CO adsorption tower. Agent Patent Attorney Takeshi Kawakita Cho7: Preheater 9: Catalytic combustor 10: Catalyst 12: Valve 13: Valve Figure 2 Figure 3 Gas preheating temperature (C0) Figure 4 H2 lead time (Sec) Figure 5 H2 prior concentration ('/,) Catalyst layer inlet temperature (0C) Fig. 7 Fig. 8
Claims (4)
スを触媒を用いて接触的に燃焼させる方法において、該
ガスと空気との混合ガスが触媒と接触する前の一定時間
、Ｈ＿２と空気の混合ガスを触媒と接触させることを特
徴とする一酸化炭素および水素含有ガスの接触燃焼方法
。(1) In a method of catalytically burning a gas containing carbon monoxide (CO) and hydrogen (H_2) using a catalyst, H_2 and air are A method for catalytic combustion of a gas containing carbon monoxide and hydrogen, characterized by bringing a mixed gas of the above into contact with a catalyst.
路からＣＯ、Ｈ＿２および空気を合流させ、触媒燃焼器
の触媒層へ供給して接触燃焼させる接触燃焼装置におい
て、ＣＯおよびＨ＿２含有ガスの流路に切替可能なバイ
パス流路を設け、該バイパス流路にＣＯ除去装置を設け
たことを特徴とする一酸化炭素および水素含有ガスの接
触燃焼装置。(2) In a catalytic combustion device, CO, H_2 and air are combined from the CO and H_2 containing gas flow path and the air flow path, and are supplied to the catalyst layer of the catalytic combustor for catalytic combustion. A catalytic combustion device for gas containing carbon monoxide and hydrogen, characterized in that a switchable bypass flow path is provided in the flow path, and a CO removal device is provided in the bypass flow path.
路からＣＯ、Ｈ＿２および空気を合流させ、触媒燃焼器
の触媒層へ供給して接触燃焼させる接触燃焼装置におい
て、前記ＣＯおよびＨ＿２含有ガスと空気との合流点と
、触媒燃焼器との間にＣＯ吸着塔を設けたことを特徴と
する一酸化炭素および水素含有ガスの接触燃焼装置。(3) In a catalytic combustion device in which CO, H_2, and air are combined from a CO- and H_2-containing gas flow path and an air flow path, and are supplied to a catalyst layer of a catalytic combustor for catalytic combustion, the CO- and H_2-containing gas is A catalytic combustion device for gas containing carbon monoxide and hydrogen, characterized in that a CO adsorption tower is provided between a confluence point of carbon monoxide and air and a catalytic combustor.
流側に熱交換器を設け、燃焼排ガスと空気とを熱交換す
ることにより、吸着塔に流入するガス温度を高め、吸着
剤の吸着能を回復させるようにしたことを特徴とする一
酸化炭素および水素含有ガスの接触燃焼装置。(4) In claim (3), a heat exchanger is provided on the upstream side of the confluence point to exchange heat between the combustion exhaust gas and air, thereby increasing the temperature of the gas flowing into the adsorption tower and increasing the temperature of the gas flowing into the adsorption tower. A catalytic combustion device for gases containing carbon monoxide and hydrogen, characterized in that the adsorption capacity of the gas is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185578A JPH0617734B2 (en) | 1985-08-23 | 1985-08-23 | Catalytic combustion device for gas containing carbon monoxide and hydrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185578A JPH0617734B2 (en) | 1985-08-23 | 1985-08-23 | Catalytic combustion device for gas containing carbon monoxide and hydrogen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6246116A true JPS6246116A (en) | 1987-02-28 |
| JPH0617734B2 JPH0617734B2 (en) | 1994-03-09 |
Family
ID=16173261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60185578A Expired - Lifetime JPH0617734B2 (en) | 1985-08-23 | 1985-08-23 | Catalytic combustion device for gas containing carbon monoxide and hydrogen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617734B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5248251A (en) * | 1990-11-26 | 1993-09-28 | Catalytica, Inc. | Graded palladium-containing partial combustion catalyst and a process for using it |
| US5250489A (en) * | 1990-11-26 | 1993-10-05 | Catalytica, Inc. | Catalyst structure having integral heat exchange |
| US5258349A (en) * | 1990-11-26 | 1993-11-02 | Catalytica, Inc. | Graded palladium-containing partial combustion catalyst |
| US5259754A (en) * | 1990-11-26 | 1993-11-09 | Catalytica, Inc. | Partial combustion catalyst of palladium on a zirconia support and a process for using it |
| JPH0611119A (en) * | 1992-06-24 | 1994-01-21 | Sanyo Electric Co Ltd | Catalyst combustion device |
| US5281128A (en) * | 1990-11-26 | 1994-01-25 | Catalytica, Inc. | Multistage process for combusting fuel mixtures |
| US5326253A (en) * | 1990-11-26 | 1994-07-05 | Catalytica, Inc. | Partial combustion process and a catalyst structure for use in the process |
| US5425632A (en) * | 1990-11-26 | 1995-06-20 | Catalytica, Inc. | Process for burning combustible mixtures |
| EP0743294A1 (en) * | 1995-05-19 | 1996-11-20 | Corning Incorporated | Dehydration of alkanes in the presence of barium silicate |
| JP2006282451A (en) * | 2005-03-31 | 2006-10-19 | Toyota Central Res & Dev Lab Inc | Hydrogen fuel supply system |
| US7345641B2 (en) | 2002-11-05 | 2008-03-18 | Mitsumi Electric Co., Ltd. | Antenna apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52132338A (en) * | 1976-04-30 | 1977-11-07 | Shin Kobe Electric Machinery | Method of producing battery plate lattice |
-
1985
- 1985-08-23 JP JP60185578A patent/JPH0617734B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52132338A (en) * | 1976-04-30 | 1977-11-07 | Shin Kobe Electric Machinery | Method of producing battery plate lattice |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5326253A (en) * | 1990-11-26 | 1994-07-05 | Catalytica, Inc. | Partial combustion process and a catalyst structure for use in the process |
| US5425632A (en) * | 1990-11-26 | 1995-06-20 | Catalytica, Inc. | Process for burning combustible mixtures |
| US5258349A (en) * | 1990-11-26 | 1993-11-02 | Catalytica, Inc. | Graded palladium-containing partial combustion catalyst |
| US5259754A (en) * | 1990-11-26 | 1993-11-09 | Catalytica, Inc. | Partial combustion catalyst of palladium on a zirconia support and a process for using it |
| US5405260A (en) * | 1990-11-26 | 1995-04-11 | Catalytica, Inc. | Partial combustion catalyst of palladium on a zirconia support and a process for using it |
| US5281128A (en) * | 1990-11-26 | 1994-01-25 | Catalytica, Inc. | Multistage process for combusting fuel mixtures |
| US5250489A (en) * | 1990-11-26 | 1993-10-05 | Catalytica, Inc. | Catalyst structure having integral heat exchange |
| US5248251A (en) * | 1990-11-26 | 1993-09-28 | Catalytica, Inc. | Graded palladium-containing partial combustion catalyst and a process for using it |
| US5511972A (en) * | 1990-11-26 | 1996-04-30 | Catalytica, Inc. | Catalyst structure for use in a partial combustion process |
| JPH0611119A (en) * | 1992-06-24 | 1994-01-21 | Sanyo Electric Co Ltd | Catalyst combustion device |
| EP0743294A1 (en) * | 1995-05-19 | 1996-11-20 | Corning Incorporated | Dehydration of alkanes in the presence of barium silicate |
| US7345641B2 (en) | 2002-11-05 | 2008-03-18 | Mitsumi Electric Co., Ltd. | Antenna apparatus |
| JP2006282451A (en) * | 2005-03-31 | 2006-10-19 | Toyota Central Res & Dev Lab Inc | Hydrogen fuel supply system |
| JP4559900B2 (en) * | 2005-03-31 | 2010-10-13 | 株式会社豊田中央研究所 | Hydrogen fuel supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617734B2 (en) | 1994-03-09 |
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