JPH02101301A - Gas burning duct burner - Google Patents
Gas burning duct burnerInfo
- Publication number
- JPH02101301A JPH02101301A JP25196188A JP25196188A JPH02101301A JP H02101301 A JPH02101301 A JP H02101301A JP 25196188 A JP25196188 A JP 25196188A JP 25196188 A JP25196188 A JP 25196188A JP H02101301 A JPH02101301 A JP H02101301A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- carbon
- fuel
- duct burner
- chromium
- 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
- 239000000446 fuel Substances 0.000 claims abstract description 33
- 239000011651 chromium Substances 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010409 thin film Substances 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 19
- 239000007789 gas Substances 0.000 abstract description 11
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 238000007747 plating Methods 0.000 abstract description 2
- 238000007751 thermal spraying Methods 0.000 abstract description 2
- 230000003292 diminished effect Effects 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 238000004939 coking Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910001026 inconel Inorganic materials 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- -1 5Hs Natural products 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Combustion Of Fluid Fuel (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、ガスタービン排気ガス等の含有酸素を利用し
てボイラ等の助燃に使用するためのダクトの中に配置さ
れるガス焚ダクトバーナに関し、より詳細にはその気体
燃料を供給する燃料管でのカーボン生成を抑制する技術
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gas-fired duct burner disposed in a duct for use in auxiliary combustion of a boiler etc. using oxygen contained in gas turbine exhaust gas, etc. In particular, the present invention relates to technology for suppressing carbon formation in fuel pipes that supply gaseous fuel.
従来の技術
このようなガス焚きダクトバーナにおいて、その気体燃
料を供給する燃料管は、従来、耐熱性の点からＳＯ３３
１０等のステンレス鋼から作られている。Conventional technology In such a gas-fired duct burner, the fuel pipe that supplies the gaseous fuel has conventionally been made of SO33 from the viewpoint of heat resistance.
Made from grade 10 stainless steel.
発明が解決しようとする課題
しかし、ガス焚きダクトバーナの燃料管は一般に４００
〜７００℃に加熱されるので、従来のステンレス鋼製の
燃料管では、使用燃料によっては燃料管内でコーキング
を生じ、プラントの運転に支障を来すことがあった。Problems to be Solved by the Invention However, the fuel pipe of a gas-fired duct burner generally has a diameter of 400 mm.
Because the fuel pipes are heated to ~700°C, in conventional stainless steel fuel pipes, depending on the fuel used, coking may occur within the fuel pipes, which may impede plant operation.
すなわち、一般に、ガス焚きダクトバーナに使用される
燃料は千差万別であり、Ｈｌ、ＣＯのほか、ＣＨ，、Ｃ
５Ｈｓ等の飽和炭化水素、Ｃ，Ｈいｃｓｎｓ等の不飽和
炭化水素、或いはベンゼン等の芳香族炭化水素を含む場
合がある。そして、このうち、ＣＯ１不飽和炭化水素、
芳香族炭化水素を多く含むと、金属面が触媒となり、カ
ーボンを生成する。特に、Ｆｅ５１１１系は触媒性が大
きく、カーボンの発生量が条件（温度、ガス流速等）に
よっては極めて多大となり、燃料管のコーキング、ひい
てはプラントの運転停止の原因となる。In other words, there are generally a wide variety of fuels used in gas-fired duct burners, including Hl, CO, CH, and C.
It may contain saturated hydrocarbons such as 5Hs, unsaturated hydrocarbons such as C, Hcsns, or aromatic hydrocarbons such as benzene. Among these, CO1 unsaturated hydrocarbons,
When it contains a large amount of aromatic hydrocarbons, the metal surface acts as a catalyst and generates carbon. In particular, the Fe5111 system has high catalytic properties, and depending on the conditions (temperature, gas flow rate, etc.), the amount of carbon generated can be extremely large, causing coking of fuel pipes and, ultimately, plant shutdown.
この対策として、燃料管を二重管方式とし、コーキング
が生じない低温度（２００℃以下）まで水冷することが
考えられるが、これではガス焚きダクトバーナの構成を
複雑にするばかりか、そのンステムとしての効率の低下
を招く不具合が生じる。As a countermeasure to this problem, it is possible to make the fuel pipe a double pipe system and water-cool it to a low temperature (below 200°C) where coking does not occur, but this would not only complicate the configuration of the gas-fired duct burner, but also make the system difficult. A problem occurs that causes a decrease in efficiency.
課題を解決するための手段
本発明は、以上述べた従来技術の課題を解決するために
、ダクトの中に配置されるガス焚きダクトバーナにおい
て、気体燃料を供給する燃料管の少なくとも内面の主要
部分をクロム又は銅の薄膜で被覆したものである。Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides a gas-fired duct burner arranged in a duct, in which at least the main part of the inner surface of the fuel pipe that supplies gaseous fuel is It is coated with a thin film of chromium or copper.
作用
このように、ガス焚きダクトバーナにおける燃料管をク
ロム又は銅で表面被覆すると、ダクトバーナの実用的な
使用範囲では、そのカーボン生成のための触媒性は低下
し、殆どカーボンは生じない。Operation Thus, when the fuel tube in a gas-fired duct burner is surface-coated with chromium or copper, its catalytic property for carbon formation is reduced and almost no carbon is produced in the range of practical use of the duct burner.
実施例
以下図面を参照して、本発明の実施例について詳述する
。Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１および２図において、Ｉはガス焚きダクトバーナに
おいて気体燃料を供給する燃料管であり、例えばＳＯＳ
３１０等のステンレス鋼で作られている。In Figures 1 and 2, I is a fuel pipe that supplies gaseous fuel in a gas-fired duct burner, such as an SOS
Made of 310 grade stainless steel.
そして、本発明によれば、この燃料管ｌの少なくとも内
面の主要部分を溶射或いはメツキ等の方法によって、ク
ロム又は銅の薄膜２で被覆し、これによりガス焚きダク
トバーナの実用的な使用範囲では、そのカーボン生成の
ための触媒性を低下させ、殆どカーボンを生じさせない
ようにしている。According to the present invention, at least the main part of the inner surface of the fuel pipe l is coated with a thin chromium or copper film 2 by a method such as thermal spraying or plating. The catalytic properties for carbon production are lowered so that almost no carbon is produced.
本発明の有用性を示すため、実験室基礎試験を実施した
。その実験装置のフローンートを第３図に示す。Basic laboratory tests were conducted to demonstrate the utility of the present invention. Figure 3 shows the flow route of the experimental equipment.
第３図において、１１は燃料模擬ガスの供給ライン、１
２は加熱用電気炉、１３は磁製反応管であり、１４が供
試燃料管で、内径が１１麓厘のものを用いた。In FIG. 3, 11 is a fuel simulating gas supply line;
2 is an electric furnace for heating, 13 is a porcelain reaction tube, and 14 is a test fuel tube, which has an inner diameter of 11 mm.
そして、試験は模擬ガスを実機に近い流速（１，５ｘ／
５ｅｃ）で２時間流し、その後の供試燃料管１４内のカ
ーボン付着状況をファイバスコープによって観察すると
ともに、水洗、ろ過によって付着カーボン量を調査した
。その結果を次の表に示す。The test was conducted using a simulated gas at a flow rate close to that of the actual machine (1.5x/
5ec) for 2 hours, and then the state of carbon adhesion inside the test fuel tube 14 was observed using a fiberscope, and the amount of adhering carbon was investigated by water washing and filtration. The results are shown in the table below.
この表から明らかなように、一般に使用されているＳＵ
Ｓ ３１０のステンレス製管（比較例）では、カーボン
の発生量が多大で、試験終了近くでは、管閉塞がみられ
た。As is clear from this table, commonly used SU
In the S 310 stainless steel tube (comparative example), a large amount of carbon was generated, and tube blockage was observed near the end of the test.
これに対し、５ｔｌＳ ３１０のステンレス製管の内面
にそれぞれＣｒメツキ（５０μ）した実施例（１）及び
Ｃｕメツキ（７０μ）した実施例（２）では、カーボン
の発生量は殆どなく、実機に適用してもカーボン生成の
問題は生じないものと期待される。On the other hand, in Example (1) where the inner surface of the stainless steel tube of 5tlS 310 was plated with Cr (50μ) and Example (2) where the inner surface was plated with Cu (70μ), there was almost no carbon generation, and it was applicable to the actual machine. However, it is expected that there will be no problem with carbon formation.
また、インコネル製管の内面にＣｒを溶射（８０μ）し
た実施例（３）でも、カーボンの発生量は殆どなかった
。Furthermore, in Example (3) in which Cr was thermally sprayed (80 μm) onto the inner surface of the Inconel tube, almost no amount of carbon was generated.
そして、このことから、クロム又は銅の表面被覆が十分
であれば、燃料管の素地材料はステンし・ス調でなくて
も、前述したインコネル又は軟鋼等でも問題がないこと
がわかった。From this, it was found that as long as the surface coating of chromium or copper is sufficient, the base material of the fuel tube does not have to be stainless steel or the like, and there is no problem with the above-mentioned Inconel or mild steel.
なお、本発明は、水冷等の他のコーキング抑制手段と併
用して燃料管に実施できることは勿論である。It goes without saying that the present invention can be applied to fuel pipes in combination with other coking suppressing means such as water cooling.
発明の効果
以上述べたように、本発明によれば、ガス焚きダクトバ
ーナの燃料管において、カーボンを生じ易い気体燃料に
対しても、カーボントラブルの発生をなくすことができ
、したがってプラントの運転に支障をきたすようなこと
もなくなり、実用上極めて有益な効果が得られる。Effects of the Invention As described above, according to the present invention, it is possible to eliminate the occurrence of carbon trouble in the fuel pipe of a gas-fired duct burner, even for gaseous fuel that is likely to generate carbon, and therefore, it is possible to eliminate the occurrence of carbon troubles, which will hinder the operation of the plant. There is no possibility that this will cause any problems, and an extremely beneficial effect can be obtained in practice.
第１図は本発明によるガス焚きダクトバーナで用いられ
る燃料管の一例を示す要部の断面図、第２図は第１図の
■−■線断面図、第３図は本発明の有用性を示すために
用いた実験装置のフローシートである。
訴
ｌ・・燃料管、２・・クロム又は舅の薄膜、１１・・燃
料模擬ガスの供給ライン、１２・・加熱用電気炉、１３
・・磁製反応管、１４・・供試燃料管。Fig. 1 is a sectional view of essential parts showing an example of a fuel pipe used in a gas-fired duct burner according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 shows the usefulness of the present invention. This is a flow sheet of the experimental equipment used to demonstrate this. 1.Fuel pipe, 2.Chromium or copper film, 11.Fuel simulating gas supply line, 12.Heating electric furnace, 13.
...Porcelain reaction tube, 14...Test fuel pipe.
Claims (1)
、気体燃料を供給する燃料管の少なくとも内面の主要部
分をクロム又は銅の薄膜で被覆したことを特徴とするガ
ス焚きダクトバーナ。A gas-fired duct burner disposed in a duct, characterized in that at least a major part of the inner surface of a fuel pipe for supplying gaseous fuel is coated with a thin film of chromium or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25196188A JPH0810042B2 (en) | 1988-10-07 | 1988-10-07 | Gas fired duct burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25196188A JPH0810042B2 (en) | 1988-10-07 | 1988-10-07 | Gas fired duct burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02101301A true JPH02101301A (en) | 1990-04-13 |
| JPH0810042B2 JPH0810042B2 (en) | 1996-01-31 |
Family
ID=17230563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25196188A Expired - Lifetime JPH0810042B2 (en) | 1988-10-07 | 1988-10-07 | Gas fired duct burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810042B2 (en) |
-
1988
- 1988-10-07 JP JP25196188A patent/JPH0810042B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0810042B2 (en) | 1996-01-31 |
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