JPH0335572B2 - - Google Patents
Info
- Publication number
- JPH0335572B2 JPH0335572B2 JP13641685A JP13641685A JPH0335572B2 JP H0335572 B2 JPH0335572 B2 JP H0335572B2 JP 13641685 A JP13641685 A JP 13641685A JP 13641685 A JP13641685 A JP 13641685A JP H0335572 B2 JPH0335572 B2 JP H0335572B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- catalyst
- fuel gas
- heat
- combustion catalyst
- 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
Links
- 239000003054 catalyst Substances 0.000 claims description 69
- 238000002485 combustion reaction Methods 0.000 claims description 63
- 239000002737 fuel gas Substances 0.000 claims description 25
- 230000003197 catalytic effect Effects 0.000 claims description 21
- 238000007254 oxidation reaction Methods 0.000 claims description 19
- 230000003647 oxidation Effects 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- -1 platinum group metals Chemical class 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052763 palladium Inorganic materials 0.000 claims 1
- 229910052697 platinum Inorganic materials 0.000 claims 1
- 229910052723 transition metal Inorganic materials 0.000 claims 1
- 150000003624 transition metals Chemical class 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 11
- 229910052717 sulfur Inorganic materials 0.000 description 11
- 239000011593 sulfur Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 6
- 239000003205 fragrance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
Landscapes
- Gas Burners (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は触媒体上に都市ガス等の気体燃料を供
給し、燃焼用空気によつて前記の気体燃料を触媒
燃焼させ、生成した反応熱を利用する触媒バーナ
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention supplies a gaseous fuel such as city gas onto a catalyst body, catalytically burns the gaseous fuel using combustion air, and utilizes the generated reaction heat. catalytic burner.
従来の技術
従来この種の触媒バーナは、第３図に示す様
に、耐熱性金属からなるバーナケースＡ内には、
耐熱性セラミツクス繊維成型体から成る保温材Ｂ
と、耐熱性多孔質セラミツク繊維集合体にPt、
Pd、Ph等の白金族金属を用いた酸化触媒を担持
した燃焼用触媒体Ｃが設置され、燃料ガスは燃焼
用触媒体Ｃにより定常的な触媒酸化作用を受ける
構成となつていた。BACKGROUND ART Conventionally, this type of catalytic burner has a burner case A made of a heat-resistant metal, as shown in FIG.
Heat insulating material B made of heat-resistant ceramic fiber molded body
and Pt on the heat-resistant porous ceramic fiber aggregate.
A combustion catalyst C supporting an oxidation catalyst using platinum group metals such as Pd and Ph was installed, and the fuel gas was subjected to a constant catalytic oxidation action by the combustion catalyst C.
発明が解決しようとする問題点
従来の技術の構成によれば、都市ガス等の燃料
ガスは直接的に燃焼用触媒体Ｃで酸化される様に
なつているため、都市ガス等に後天的に数ppmか
ら10ppm程度混入されたメルカプタン等の含硫黄
付臭剤も当然燃焼用触媒体Ｃ中に流入する。一
方、燃焼用触媒体Ｃでの触媒燃焼の温度範囲は
400〜600℃と比較的低温であるため、付臭剤中の
硫黄分もSO3に完全酸化されにくく、逆に触媒金
属を硫化し失活させて行く。従つて、10000時間、
5000時間といつた長期の燃焼の際には触媒金属の
硫化被毒はかなり進行し、結果的に燃焼用触媒体
の燃焼性能の低下につながつていた。Problems to be Solved by the Invention According to the configuration of the conventional technology, fuel gas such as city gas is directly oxidized by the combustion catalyst C. Naturally, the sulfur-containing odorant such as mercaptan mixed in from several ppm to about 10 ppm also flows into the combustion catalyst C. On the other hand, the temperature range of catalytic combustion in combustion catalyst C is
Because the temperature is relatively low at 400 to 600°C, the sulfur content in the odorant is difficult to be completely oxidized to SO 3 , and on the contrary, the catalyst metal is sulfurized and deactivated. Therefore, 10000 hours,
During long-term combustion, such as 5000 hours, sulfide poisoning of the catalyst metal progressed considerably, resulting in a decrease in the combustion performance of the combustion catalyst.
本発明はかかる従来の問題点を解消するもの
で、燃料ガス中の付臭剤の硫黄分の触媒金属に対
する影響を最小限に抑え、触媒燃焼性能の寿命を
伸ばすことを目的とする。 The present invention solves these conventional problems, and aims to extend the life of catalyst combustion performance by minimizing the influence of the sulfur content of the odorant in the fuel gas on the catalyst metal.
問題点を解決するための手段
上記の問題点を解決するために本発明の触媒バ
ーナでは２種類の燃焼用触媒体を用い、燃料ガス
流に対し上流側に耐熱性多孔質セラミツクス繊維
集合体を担体とし、酸化触媒と脱硫触媒を混合担
持した第１の燃焼用触媒体、下流側に同じく耐熱
性多孔質セラミツクス繊維集合体に酸化触媒のみ
を担持した第２の燃焼用触媒体を配置したもので
ある。Means for Solving the Problems In order to solve the above problems, the catalytic burner of the present invention uses two types of combustion catalyst bodies, and a heat-resistant porous ceramic fiber aggregate is placed on the upstream side of the fuel gas flow. A first combustion catalyst supporting a mixture of an oxidation catalyst and a desulfurization catalyst as a carrier, and a second combustion catalyst supporting only an oxidation catalyst on a heat-resistant porous ceramic fiber aggregate on the downstream side. It is.
作 用
本発明は上記の構成によつて、供給された都市
ガス等の含硫黄燃料ガスは、第１の燃焼用触媒体
で脱硫処理されると同時に、酸化触媒によりある
程度酸化される。そして、第１の燃焼用触媒体を
通過した燃料ガス中には一部CO2、CO等の排ガ
スを含むが、硫黄分はほぼ皆無に近く、この状態
で第２の燃焼用触媒体内に流入し、ほぼ完全に酸
化される。したがつて、第１の燃焼用触媒体中で
は、酸化触媒金属の極く微量が硫化を受けるが硫
黄分の大半は第１の燃焼用触媒体の脱硫触媒によ
り吸収される。また、第１の燃焼用触媒体上での
燃料ガスの酸化反応により発生した熱で第１の燃
焼用触媒体上での脱硫活性化温度が保持できる。
この様に、第１の燃焼用触媒体の酸化触媒は極く
微量が硫化されるが、1000時間、5000時間程度の
長時間の燃焼でも影響が出る程ではない。さらに
第２の燃焼用触媒体については硫黄分による被毒
は皆無と言つて差し支えないようになる。Effects According to the present invention, the supplied sulfur-containing fuel gas, such as city gas, is desulfurized by the first combustion catalyst and oxidized to some extent by the oxidation catalyst. The fuel gas that has passed through the first combustion catalyst body contains some exhaust gases such as CO 2 and CO, but almost no sulfur content, and in this state it flows into the second combustion catalyst body. and is almost completely oxidized. Therefore, in the first combustion catalyst body, a very small amount of the oxidation catalyst metal undergoes sulfidation, but most of the sulfur content is absorbed by the desulfurization catalyst of the first combustion catalyst body. Further, the desulfurization activation temperature on the first combustion catalyst can be maintained by the heat generated by the oxidation reaction of the fuel gas on the first combustion catalyst.
In this way, the oxidation catalyst of the first combustion catalyst body is sulfurized in a very small amount, but this is not enough to have any effect even after long-term combustion of about 1,000 or 5,000 hours. Furthermore, it can be safely said that the second combustion catalyst body is not poisoned by sulfur content at all.
実施例
以下、本発明の触媒バーナの実施例を添付の図
面に基づいて説明する。Embodiments Hereinafter, embodiments of the catalytic burner of the present invention will be described based on the accompanying drawings.
第１図に於いて、耐熱性金属からなるバーナケ
ース１の底部には燃料ガス流入口２が貫通して設
置され、耐熱性金属からなるスペーサ３と前記バ
ーナケース１によりガス室４が形成されている。
燃料ガス流に対しスペーサ３から下流側には耐熱
性セラミツクス繊維成型体からなる保温材５、ニ
クロムヒータ線からなる予熱器６、耐熱性多孔質
セラミツクス繊維集合体にPhを主成分とする酸
化触媒とZnOを主成分とする脱硫触媒を混合担持
した第１の燃焼用触媒体７、同じく耐熱性多孔質
セラミツクス繊維集合体にRhを主成分とする酸
化触媒のみを担持した第２の燃焼用触媒体８、耐
熱性金属からなる保持ネツト９が設置されてい
る。 In FIG. 1, a fuel gas inlet 2 is installed through the bottom of a burner case 1 made of heat-resistant metal, and a gas chamber 4 is formed by a spacer 3 made of heat-resistant metal and the burner case 1. ing.
On the downstream side of the spacer 3 with respect to the fuel gas flow, there is a heat insulating material 5 made of a heat-resistant ceramic fiber molded body, a preheater 6 made of a nichrome heater wire, and an oxidation catalyst containing Ph as a main component in the heat-resistant porous ceramic fiber aggregate. A first combustion catalyst body 7 that supports a mixture of a desulfurization catalyst mainly composed of A medium 8 and a holding net 9 made of heat-resistant metal are installed.
次に上記構成に於ける作用を説明する。 Next, the operation of the above configuration will be explained.
予熱器６に通電されると、発生した電気的な熱
は第１の燃焼用触媒体７および保温材５に伝達さ
れ、第１の燃焼用触媒体７が活性化温度に到達す
ると、燃料ガスが燃料ガス流入口２を通じてガス
室４内に充満する。さらにガス室４内に充満した
燃料ガスは保温材５内を徐々に加温されながら均
一に拡散し、第１の燃焼用触媒体７中に流入す
る。燃焼用触媒体７中で燃料ガスは酸化触媒の粒
子に吸着され、炭素と水素の結合が分断されると
同時に第１の燃焼用触媒体７中に拡散してきた燃
焼空気中のO2が前記の吸着した炭素を攻撃し、
触媒酸化反応によりCO2として脱離する。また一
方、分断された水素は同様にO2の攻撃を受け
H2Oとして排出されるが、水素の一部はメルカ
プタン等の付臭剤中のＳ分（硫黄分）と結合して
H2Sを形成する。このH2Sは酸化触媒にとつては
強力な被毒物質であるが、大半は第１の燃焼用触
媒体７中のZnO等の脱硫触媒によりZnSとして吸
収され、H2Sの極くわずかが酸化触媒を被毒する
にすぎない。したがつて第１の燃焼用触媒体７の
性能劣化はほとんど起こらない。この様にして第
１の燃焼用触媒体７を通過した燃焼ガスは、第１
の燃焼用触媒体７で一部が酸化反応されると共に
燃料ガス中のＳ分はほぼ完全に除去される。した
がつて上記の様にＳ分を除去された燃料ガスが第
２の燃焼用触媒体８に至れば燃焼用空気によつて
ほとんど酸化され、CO2とH2O蒸気として排出さ
れ、Ｓ分による第２燃焼用触媒８の被毒の心配は
全くない。 When the preheater 6 is energized, the generated electrical heat is transferred to the first combustion catalyst body 7 and the heat insulating material 5, and when the first combustion catalyst body 7 reaches the activation temperature, the fuel gas is filled into the gas chamber 4 through the fuel gas inlet 2. Further, the fuel gas filling the gas chamber 4 is gradually heated and uniformly diffused inside the heat insulating material 5, and flows into the first combustion catalyst body 7. In the combustion catalyst body 7, the fuel gas is adsorbed by particles of the oxidation catalyst, and the bond between carbon and hydrogen is broken, and at the same time, the O 2 in the combustion air that has diffused into the first combustion catalyst body 7 is attacks the adsorbed carbon of
Desorbed as CO 2 by catalytic oxidation reaction. On the other hand, the separated hydrogen is also attacked by O2 .
Although it is emitted as H 2 O, some of the hydrogen combines with the S content (sulfur content) in odorants such as mercaptans.
Forms H2S . This H 2 S is a strong poison for the oxidation catalyst, but most of it is absorbed as ZnS by the desulfurization catalyst such as ZnO in the first combustion catalyst body 7, and only a small amount of H 2 S is absorbed. only poisons the oxidation catalyst. Therefore, the performance of the first combustion catalyst body 7 hardly deteriorates. The combustion gas that has passed through the first combustion catalyst body 7 in this way is
A part of the S content in the fuel gas is oxidized in the combustion catalyst body 7, and the S content in the fuel gas is almost completely removed. Therefore, when the fuel gas from which the S content has been removed as described above reaches the second combustion catalyst 8, it is mostly oxidized by the combustion air and is discharged as CO 2 and H 2 O vapor, and the S content is removed. There is no fear that the second combustion catalyst 8 will be poisoned by the above.
次に本発明の触媒バーナの実施例の燃焼性能と
従来の触媒バーナの燃焼性能の比較を、燃焼継続
時間により行つた。第２１図中、縦軸は燃料ガス
の燃焼率（％）、横軸は燃焼経過時間（時間）を
示し、白丸は従来の触媒バーナの場合、黒丸は本
発明の触媒バーナの実施例の場合を示している。 Next, the combustion performance of the embodiment of the catalytic burner of the present invention and the combustion performance of a conventional catalytic burner were compared based on combustion duration. In Fig. 21, the vertical axis shows the combustion rate (%) of the fuel gas, the horizontal axis shows the elapsed combustion time (hours), the white circles are for the conventional catalytic burner, and the black circles are for the embodiment of the catalytic burner of the present invention. It shows.
図から分かる様に、2000時間程度の燃焼経過時
間では、従来例の場合が燃焼率97％まで低下する
のに対し、本発明の実施例に於ては以然99％程度
の燃焼率を保持している。本発明の実施例の場合
でも極くわずかながら燃焼性能が落ちているの
は、第１の燃焼用触媒体７中でZnSとなり得なか
つた極く微量のＳ分がRhSとなつて失活するた
め、第１の燃焼用触媒体７での燃焼性能がわずか
に低下したことによるものと思われる。 As can be seen from the figure, after approximately 2000 hours of elapsed combustion time, the combustion rate of the conventional example decreases to 97%, whereas the combustion rate of the embodiment of the present invention is maintained at approximately 99%. are doing. Even in the case of the embodiment of the present invention, the combustion performance is slightly degraded because the extremely small amount of S that could not become ZnS in the first combustion catalyst body 7 becomes RhS and is deactivated. This seems to be because the combustion performance of the first combustion catalyst body 7 was slightly lowered.
発明の効果
本発明の触媒バーナによれば次に列記する効果
が得られる。Effects of the Invention According to the catalytic burner of the present invention, the following effects can be obtained.
(1) 燃焼用触媒体を２種類に分け、燃料ガス流に
対し上流側に耐熱性多孔質繊維集合体からなり
酸化触媒とZnO等の脱硫触媒を混合担持した第
１の燃焼用触媒体、下流側に同じく耐熱性多孔
質繊維集合体に酸化触媒を担持した第２の燃焼
用触媒体を設置したことにより、都市ガス等の
燃料ガスの付臭剤中に含有される硫黄分を第１
の燃焼用触媒体で補集することができ、また第
１の燃焼用触媒体にて燃料ガスの一部を酸化反
応させることができる。(1) The combustion catalyst body is divided into two types, and the first combustion catalyst body is made of a heat-resistant porous fiber aggregate and supports a mixture of an oxidation catalyst and a desulfurization catalyst such as ZnO on the upstream side of the fuel gas flow; By installing a second combustion catalyst body in which an oxidation catalyst is similarly supported on a heat-resistant porous fiber aggregate on the downstream side, the sulfur content contained in the odorant of fuel gas such as city gas is
The fuel gas can be collected by the first combustion catalyst, and a part of the fuel gas can be subjected to an oxidation reaction in the first combustion catalyst.
(2) また、第１燃焼用触媒体で硫黄分を除去した
燃料ガスが第２の燃焼用触媒体に流入するた
め、第１の燃焼用触媒体の硫黄分による性能劣
化は起こらないため、長寿命で高い燃焼率を保
持する触媒バーナが得られる。(2) In addition, since the fuel gas from which sulfur content has been removed in the first combustion catalyst body flows into the second combustion catalyst body, performance deterioration due to the sulfur content of the first combustion catalyst body does not occur. A catalytic burner that has a long life and maintains a high combustion rate is obtained.
第１図は本発明の触媒バーナの一実施例の縦断
面図、第２図は本発明の触媒バーナと従来の触媒
バーナとの燃焼性能比較図、第３図は従来の触媒
バーナの縦断面図である。
１……ケース、２……燃料ガス流入口、６……
予熱器、７……第１の燃焼用触媒体、８……第２
の燃焼用触媒体。
Fig. 1 is a longitudinal cross-sectional view of one embodiment of the catalytic burner of the present invention, Fig. 2 is a comparison diagram of combustion performance between the catalytic burner of the present invention and a conventional catalytic burner, and Fig. 3 is a longitudinal cross-sectional view of a conventional catalytic burner. It is a diagram. 1... Case, 2... Fuel gas inlet, 6...
Preheater, 7...first combustion catalyst body, 8...second
catalyst for combustion.
Claims (1)
バーナケース内に、燃料ガス流に対し上流側から
予熱器、耐熱性多孔質繊維集合体に酸化触媒と脱
硫触媒を混合担持した第１の燃焼用触媒体、同じ
く耐熱性多孔質繊維集合体に酸化触媒を担持した
第２の燃焼用触媒体を順次設置した触媒バーナ。 ２ 酸化触媒として、Pt、Pd、Ph等の白金族金
属の内１種類以上、あるいは白金族金属にNi、
Co、Fe等の遷移金属の酸化物の内１種類以上を
混入した特許請求の範囲第１項記載の触媒バー
ナ。 ３ 脱硫触媒としてZnO、あるいはZnOとNoO3
の複合酸化物を用いた特許請求の範囲第１項記載
の触媒バーナ。[Scope of Claims] 1. In a burner case made of heat-resistant metal and having a fuel gas inlet, a preheater is placed from the upstream side of the fuel gas flow, and an oxidation catalyst and a desulfurization catalyst are mixed and supported on a heat-resistant porous fiber aggregate. A catalytic burner in which a first combustion catalytic body and a second combustion catalytic body in which an oxidation catalyst is supported on a heat-resistant porous fiber aggregate are sequentially installed. 2 As an oxidation catalyst, one or more platinum group metals such as Pt, Pd, Ph, etc., or platinum group metals with Ni,
The catalytic burner according to claim 1, which contains one or more oxides of transition metals such as Co and Fe. 3 ZnO or ZnO and NoO as a desulfurization catalyst
A catalytic burner according to claim 1, which uses a composite oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60136416A JPS61295408A (en) | 1985-06-21 | 1985-06-21 | Catalyst burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60136416A JPS61295408A (en) | 1985-06-21 | 1985-06-21 | Catalyst burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61295408A JPS61295408A (en) | 1986-12-26 |
| JPH0335572B2 true JPH0335572B2 (en) | 1991-05-28 |
Family
ID=15174645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60136416A Granted JPS61295408A (en) | 1985-06-21 | 1985-06-21 | Catalyst burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61295408A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10000652C2 (en) * | 2000-01-11 | 2002-06-20 | Bosch Gmbh Robert | Burner with a catalytically active porous body |
-
1985
- 1985-06-21 JP JP60136416A patent/JPS61295408A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61295408A (en) | 1986-12-26 |
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