JP2001272003A - Method for combustion of low oxygen-concentration gas - Google Patents
Method for combustion of low oxygen-concentration gasInfo
- Publication number
- JP2001272003A JP2001272003A JP2000091563A JP2000091563A JP2001272003A JP 2001272003 A JP2001272003 A JP 2001272003A JP 2000091563 A JP2000091563 A JP 2000091563A JP 2000091563 A JP2000091563 A JP 2000091563A JP 2001272003 A JP2001272003 A JP 2001272003A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- gas
- combustion
- low
- concentration gas
- 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.)
- Granted
Links
Classifications
-
- Y02E20/344—
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、たとえば酸素分離
装置からのオフガスである高温の低酸素濃度ガスを燃焼
させる低酸素濃度ガスの燃焼方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burning a low-oxygen gas, for example, a high-temperature low-oxygen gas which is an off-gas from an oxygen separator.
【０００２】[0002]
【従来の技術】支燃性ガスとして高濃度酸素を使用する
酸素バーナを用いた燃焼装置においては、酸素供給源と
して、たとえば空気中の酸素と窒素を分離して高濃度酸
素を発生する酸素分離装置を用いる場合がある。酸素分
離装置として、セラミックから成るイオン導電体材料か
ら構成される固体電解質膜を用いた酸素分離装置があ
る。この酸素分離装置から得られた高濃度酸素を前記酸
素バーナに、支燃性ガスとして供給して燃焼させる。2. Description of the Related Art In a combustion apparatus using an oxygen burner which uses high-concentration oxygen as a supporting gas, an oxygen separation source, for example, which separates oxygen and nitrogen in air to generate high-concentration oxygen The device may be used. As an oxygen separator, there is an oxygen separator using a solid electrolyte membrane made of an ion conductor material made of ceramic. The high-concentration oxygen obtained from the oxygen separator is supplied to the oxygen burner as a supporting gas and burned.
【０００３】[0003]
【発明が解決しようとする課題】この酸素分離装置は、
作動温度が高く、７００〜１０００℃程度の高温で作動
し、高温の低酸素濃度ガスをオフガスとして排出する
が、このオフガスの有効利用についてははあまり考えら
れていない。本発明の目的は、高温の低酸素濃度ガスを
有効に利用することである。SUMMARY OF THE INVENTION
The operating temperature is high, it operates at a high temperature of about 700 to 1000 ° C., and discharges a high-temperature low-oxygen-concentration gas as an off-gas. However, little consideration has been given to the effective use of this off-gas. An object of the present invention is to effectively use a high-temperature low oxygen concentration gas.
【０００４】[0004]
【課題を解決するための手段】請求項１記載の本発明
は、５００℃以上の高温の低酸素濃度ガスを発生する装
置からの低酸素濃度ガスに、通常の空気を一部混合させ
ながら燃焼させることを特徴とする低酸素濃度ガスの燃
焼方法である。According to the first aspect of the present invention, there is provided a combustion apparatus which mixes low-oxygen gas from a device for generating high-temperature low-oxygen gas having a temperature of 500 ° C. or more with normal air. This is a method for burning a low oxygen concentration gas.
【０００５】請求項２記載の本発明の前記低酸素濃度を
発生する装置は、セラミックのイオン導電体材料から成
る固体電解質膜を用いた酸素分離装置であることを特徴
とする。According to a second aspect of the present invention, the apparatus for generating a low oxygen concentration is an oxygen separation apparatus using a solid electrolyte membrane made of a ceramic ionic conductor material.
【０００６】酸素分離装置からは、５００℃以上の高温
の低酸素濃度ガスがオフガスとして排出される。この高
温の低酸素濃度ガスに、通常の空気を混合させることに
よって、燃焼させることができる。このように燃焼させ
ることによって、酸素分離装置のオフガスの所有するエ
ネルギを有効利用することができる。A low-oxygen gas having a high temperature of 500 ° C. or higher is discharged as an off-gas from the oxygen separator. By mixing ordinary air with the high-temperature low oxygen concentration gas, combustion can be performed. By burning in this manner, the energy possessed by the off-gas of the oxygen separator can be effectively used.
【０００７】また、酸素濃度が低い空気を燃焼させる
と、燃焼速度が遅くなり、火炎中に高温部分ができにく
くなりＮＯX（窒化酸化物）濃度は低下する。図１のグ
ラフに示すように、燃焼空気の温度が高いとＮＯXは上
昇するが、酸素濃度低減効果にて相殺される。したがっ
て、酸素分離装置からのオフガスを燃焼させることによ
って、低ＮＯXで燃焼させることができる。Further, when the oxygen concentration is to burn the low air, combustion speed is slower, NO X (nitride oxide) hardly can hot spots in the flame density is reduced. As shown in the graph of FIG. 1, the NO X temperature is high in the combustion air rises, is offset by the oxygen concentration reducing effect. Therefore, by burning the offgas from the oxygen separation device, it can be burned in a low NO X.
【０００８】請求項３記載の本発明は、前記低酸素濃度
ガスを一次空気とし、通常の空気を２次空気として段階
燃焼させることを特徴とする。According to a third aspect of the present invention, the low oxygen concentration gas is used as primary air, and ordinary air is used as secondary air for stepwise combustion.
【０００９】本発明に従えば、低酸素濃度ガスを一次空
気とし、通常の空気を２次空気として２段階燃焼させる
ことによって、火炎中心部の酸素濃度が低下してその部
分の燃焼速度が遅くなり、さらに低ＮＯXで燃焼させる
ことができる。According to the present invention, the low-oxygen-concentration gas is used as primary air, and ordinary air is used as secondary air for two-stage combustion, whereby the oxygen concentration in the center of the flame is reduced and the combustion speed in that part is reduced. it can be further combusted in low NO X.
【００１０】[0010]
【発明の実施の形態】図２は、本発明の低濃度酸素ガス
燃焼方法を用いた低濃度酸素ガス燃焼システム１の構成
を示すブロック図である。本実施形態の燃焼システム１
は、酸素分離装置２と低酸素濃度ガス燃焼装置３とを含
む。FIG. 2 is a block diagram showing the configuration of a low-concentration oxygen gas combustion system 1 using the low-concentration oxygen gas combustion method of the present invention. Combustion system 1 of the present embodiment
Includes an oxygen separation device 2 and a low oxygen concentration gas combustion device 3.
【００１１】酸素分離装置２は、固体電解質膜（ＩＴ
Ｍ：Ion Transport Membrane）を用いて酸素を分離させ
る装置である。この固体電解質膜は、セラミックから成
るイオン導電材料で構成され、酸素の高濃度分離が可能
であり、理論上酸素しか分離しない構造となっている。
また、作動温度が非常に高く、５００℃以上必要であ
り、好ましくは７００〜１０００℃の作動温度が必要で
ある。また、固体電解質膜はセラミック結晶構造である
ので、上記したような高温でも安定性が高い。[0011] The oxygen separation device 2 includes a solid electrolyte membrane (IT).
M: Ion Transport Membrane). The solid electrolyte membrane is made of an ion conductive material made of ceramic, is capable of separating oxygen at a high concentration, and has a structure in which only oxygen is theoretically separated.
In addition, the operating temperature is very high and needs to be 500 ° C. or higher, preferably 700 to 1000 ° C. Further, since the solid electrolyte membrane has a ceramic crystal structure, the stability is high even at the above-mentioned high temperature.
【００１２】固体電解質膜法による酸素分離装置には、
外部通電型と内部短絡型とがある。外部通電型は、電解
質に安定化ジルコニアを使用し、膜前後に電圧を印加し
て酸素イオンを移動させる構造である。内部短絡型は、
ランタン酸コバルトなど（混合導電体）を使用し、膜前
後の酸素分圧差を用いて内部で酸素イオンと電子を移動
させる構造である。本実施形態ではどちらを用いてもよ
い。An oxygen separation apparatus using a solid electrolyte membrane method includes:
There are an external conduction type and an internal short-circuit type. The external current-carrying type has a structure in which stabilized zirconia is used as an electrolyte and a voltage is applied across the membrane to move oxygen ions. Internal short type
The structure is such that cobalt lanthanate or the like (mixed conductor) is used, and oxygen ions and electrons are internally moved using the partial pressure difference of oxygen before and after the film. In this embodiment, either of them may be used.
【００１３】酸素分離装置２に導入された空気７は、酸
素が分離されて高濃度酸素８が得られ、この高濃度酸素
８は酸素バーナの支燃性ガスとして用いられる。The air 7 introduced into the oxygen separator 2 is separated from oxygen to obtain high-concentration oxygen 8, and this high-concentration oxygen 8 is used as a combustion supporting gas for an oxygen burner.
【００１４】酸素分離装置２からの高温のオフガスであ
る低酸素濃度ガス９は、通常の空気１０と共に低酸素濃
度ガス燃焼装置３に供給され、プロパンガスや天然ガス
などの炭化水素燃料１１を燃焼させる。酸素分離装置２
からのオフガスは高温であるので、炭化水素燃料１１を
容易に燃焼させることができる。また、低酸素濃度ガス
９を用いるので、低ＮＯXで燃焼させることができる。The low-oxygen-concentration gas 9, which is a high-temperature off-gas from the oxygen separator 2, is supplied to the low-oxygen-concentration gas combustion device 3 together with ordinary air 10, and burns a hydrocarbon fuel 11 such as propane gas or natural gas. Let it. Oxygen separator 2
Since the off-gas from is high in temperature, the hydrocarbon fuel 11 can be easily burned. Further, since the use of a low oxygen concentration gas 9, it can be burnt at a low NO X.
【００１５】図３は、本発明の低酸素濃度ガスの燃焼方
法を用いる低酸素濃度燃焼システム１５の構成を示すブ
ロック図である。本実施形態の燃焼システム１５におい
ても前述した燃焼システム１と同様に、固体電解質膜を
用いた酸素分離装置１２からの高温の低酸素濃度ガス１
６と通常の空気とを低酸素濃度ガス燃焼装置１３に供給
して燃焼させる構成であるが、本実施形態の低酸素濃度
ガス燃焼装置１３は、２段階燃焼ガスバーナ１９を用い
る。FIG. 3 is a block diagram showing a configuration of a low oxygen concentration combustion system 15 using the low oxygen concentration gas combustion method of the present invention. In the combustion system 15 of this embodiment, similarly to the combustion system 1 described above, the high-temperature low oxygen concentration gas 1 from the oxygen separator 12 using the solid electrolyte membrane is used.
6 and normal air are supplied to the low-oxygen-concentration gas combustion device 13 for combustion. The low-oxygen-concentration gas combustion device 13 of this embodiment uses a two-stage combustion gas burner 19.
【００１６】図４は、低酸素濃度ガス燃焼装置３の２段
階燃焼バーナ１９の構造を示す図である。図４に示すよ
うに、２段階燃焼バーナ１９には、低酸素濃度ガス１６
が一次空気として導入され、通常の空気が２次空気とし
て導入される。１次空気である低濃度酸素ガスの噴出口
と、炭化水素燃料の噴出口とは近接配置され、まず、低
酸素濃度ガスと炭化水素燃料とが混合されて一次燃焼す
る。２次空気である通常の空気１８の噴出口は、一次空
気噴出口の後方に配置され、１次燃焼された後、２次空
気が混合して２次燃焼が行われる。FIG. 4 is a view showing the structure of the two-stage combustion burner 19 of the low oxygen concentration gas combustion device 3. As shown in FIG. 4, the two-stage combustion burner 19 has a low oxygen concentration gas 16
Is introduced as primary air, and normal air is introduced as secondary air. The ejection port for low-concentration oxygen gas, which is primary air, and the ejection port for hydrocarbon fuel are arranged close to each other. First, the low-oxygen concentration gas and hydrocarbon fuel are mixed and subjected to primary combustion. The outlet of the normal air 18 as the secondary air is disposed behind the primary air outlet, and after the primary combustion, the secondary air is mixed to perform the secondary combustion.
【００１７】このように２段階で燃焼させることによっ
て、低温度燃焼が行われ、さらに低ＮＯXで燃焼させる
ことができる。[0017] By this manner is burned in two steps, the low temperature combustion is performed, it can be further combusted in low NO X.
【００１８】上述した本実施形態では、固体電解質膜を
用いた酸素分離装置からの低酸素濃度ガスのオフガスを
用いるように構成したが、本発明はこれに限らず、高温
の低酸素濃度ガスに通常の空気を混合させながら燃焼さ
せる場合は本発明に含まれる。In the above-described embodiment, the off-gas of the low oxygen concentration gas from the oxygen separator using the solid electrolyte membrane is used. However, the present invention is not limited to this. The case of burning while mixing ordinary air is included in the present invention.
【００１９】[0019]
【発明の効果】以上のように本発明によれば、酸素分離
装置からの高温の低酸素濃度ガスに空気を混合させなが
ら燃焼させることによって、酸素分離装置のオフガスを
有効に利用することができ、省エネルギーが達成され
る。As described above, according to the present invention, the off-gas of the oxygen separator can be effectively used by burning while mixing air with the high-temperature low oxygen concentration gas from the oxygen separator. , Energy saving is achieved.
【００２０】低酸素空気を用いるので、予熱空気を用い
るにもかかわらず、低ＮＯX燃焼を達成することができ
る。[0020] Since the use of the low-oxygen air, despite the use of preheated air, can achieve low NO X combustion.
【００２１】また、低酸素濃度ガスの燃焼方法として、
排ガス再循環方式があるが、この方法では火炎内部の酸
素濃度を下げることが困難であったが、本発明の２段階
燃焼方式では、一次空気として低酸素濃度ガスを用いる
ことにより、予熱ガスを用いているにもかかわらず、低
ＮＯX燃焼を達成することができる。In addition, as a combustion method of the low oxygen concentration gas,
Although there is an exhaust gas recirculation method, it was difficult to lower the oxygen concentration inside the flame with this method. However, in the two-stage combustion method of the present invention, the preheating gas was reduced by using a low oxygen concentration gas as the primary air. Despite being used, it is possible to achieve low NO X combustion.
【図１】空気温度とＮＯX濃度との関係を示すグラフで
ある。1 is a graph showing the relationship between air temperature and the NO X concentration.
【図２】燃焼システム１の構成を示すブロック図であ
る。FIG. 2 is a block diagram showing a configuration of a combustion system 1.
【図３】燃焼システム１５の構成を示すブロック図であ
る。FIG. 3 is a block diagram showing a configuration of a combustion system 15;
【図４】２段階燃焼バーナ１９の構造を示す図である。FIG. 4 is a view showing a structure of a two-stage combustion burner 19;
１，１５ 低酸素濃度ガス燃焼システム ２，１２ 酸素分離装置 ３，１３ 低酸素濃度ガス燃焼装置 ９，１９ ２段階燃焼バーナ １０，１８ 通常の空気 １６ 低酸素濃度ガス 1,15 Low oxygen concentration gas combustion system 2,12 Oxygen separator 3,13 Low oxygen concentration gas combustion device 9,19 Two-stage combustion burner 10,18 Normal air 16 Low oxygen concentration gas
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松村 昌彦 大阪府大阪市中央区平野町四丁目１番２号 大阪瓦斯株式会社内 (72)発明者 毛笠 明志 大阪府大阪市中央区平野町四丁目１番２号 大阪瓦斯株式会社内 Ｆターム(参考） 3K023 JA01 JD09 3K065 TA01 TB01 TB07 TB08 TD05 TE02 TF03 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiko Matsumura 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Akeshi Mogasa Hirano-cho, Chuo-ku, Osaka-shi, Osaka F-term in Osaka Gas Co., Ltd. 1-2-2 (reference) 3K023 JA01 JD09 3K065 TA01 TB01 TB07 TB08 TD05 TE02 TF03
Claims (3)
発生する装置からの低酸素濃度ガスに、通常の空気を一
部混合させながら燃焼させることを特徴とする低酸素濃
度ガスの燃焼方法。1. A method for burning a low oxygen concentration gas, comprising burning a low oxygen concentration gas from a device for generating a high oxygen concentration gas having a high temperature of 500 ° C. or more while partially mixing ordinary air with the low oxygen concentration gas. .
ミックのイオン導電体材料から成る固体電解質膜を用い
た酸素分離装置であることを特徴とする請求項１記載の
低酸素濃度ガスの燃焼方法。2. The combustion of low oxygen concentration gas according to claim 1, wherein the device for generating low oxygen concentration is an oxygen separation device using a solid electrolyte membrane made of a ceramic ion conductor material. Method.
常の空気を２次空気として段階燃焼させることを特徴と
する請求項１または２記載の低酸素濃度ガスの燃焼方
法。3. The low oxygen concentration gas combustion method according to claim 1, wherein the low oxygen concentration gas is used as primary air, and ordinary air is used as secondary air for stepwise combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000091563A JP4387549B2 (en) | 2000-03-29 | 2000-03-29 | Combustion method of low oxygen concentration gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000091563A JP4387549B2 (en) | 2000-03-29 | 2000-03-29 | Combustion method of low oxygen concentration gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001272003A true JP2001272003A (en) | 2001-10-05 |
| JP4387549B2 JP4387549B2 (en) | 2009-12-16 |
Family
ID=18607011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000091563A Expired - Fee Related JP4387549B2 (en) | 2000-03-29 | 2000-03-29 | Combustion method of low oxygen concentration gas |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015536439A (en) * | 2012-11-30 | 2015-12-21 | サウジ アラビアン オイル カンパニー | Stepwise chemical looping process with integrated oxygen production |
| JP2016003847A (en) * | 2014-06-19 | 2016-01-12 | Ｊｆｅケミカル株式会社 | Two-stage combustion method |
-
2000
- 2000-03-29 JP JP2000091563A patent/JP4387549B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015536439A (en) * | 2012-11-30 | 2015-12-21 | サウジ アラビアン オイル カンパニー | Stepwise chemical looping process with integrated oxygen production |
| KR101785816B1 (en) * | 2012-11-30 | 2017-10-16 | 사우디 아라비안 오일 컴퍼니 | Staged Chemical Looping Process with Integrated Oxygen Generation |
| US9909756B2 (en) | 2012-11-30 | 2018-03-06 | Saudi Arabian Oil Company | Staged chemical looping process with integrated oxygen generation |
| US10663163B2 (en) | 2012-11-30 | 2020-05-26 | Saudi Arabian Oil Company | Staged chemical looping process with integrated oxygen generation |
| JP2016003847A (en) * | 2014-06-19 | 2016-01-12 | Ｊｆｅケミカル株式会社 | Two-stage combustion method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4387549B2 (en) | 2009-12-16 |
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