JPH06109204A - Waste heat tubular boiler for gas reforming - Google Patents
Waste heat tubular boiler for gas reformingInfo
- Publication number
- JPH06109204A JPH06109204A JP7552392A JP7552392A JPH06109204A JP H06109204 A JPH06109204 A JP H06109204A JP 7552392 A JP7552392 A JP 7552392A JP 7552392 A JP7552392 A JP 7552392A JP H06109204 A JPH06109204 A JP H06109204A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- boiler
- smoke
- group
- waste heat
- 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
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
【０００３】[0003]
【産業上の利用分野】本発明は、ガス製造装置における
廃熱ボイラに関し、特に通過ガスの廃熱を回収する煙管
ボイラに関係する構成と改質ガス及び燃焼排ガスの通過
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste heat boiler in a gas production apparatus, and more particularly to a structure relating to a smoke tube boiler for recovering waste heat of passing gas and a method for passing reformed gas and combustion exhaust gas.
【０００４】[0004]
【従来の技術】これまでガス製造装置に関する廃熱ボイ
ラにおいては、前部煙室及び後部煙室に仕切りを入れた
図２のような２パス構造のもの、または外バイパスを組
み合わせた図３のような１パス構造のものが知られてい
る。2. Description of the Related Art Up to now, a waste heat boiler relating to a gas production apparatus has a two-pass structure as shown in FIG. 2 in which partitions are provided in a front smoke chamber and a rear smoke chamber, or as shown in FIG. Such a one-pass structure is known.
【０００５】図２は、従来の２パスボイラの１例を示し
ている。FIG. 2 shows an example of a conventional two-pass boiler.
【０００６】同図のボイラの構造は、前部煙室１６、１
７及び後部煙室５、１０が仕切り１８、９により、２室
に分離されている。さらに、ボイラ本体は、多数の煙管
を配した伝熱面積の異なる第１煙管群３と第２煙管群４
とで成っている。The structure of the boiler shown in FIG.
7 and the rear smoke chambers 5 and 10 are separated into two chambers by partitions 18 and 9. Further, the boiler body has a first smoke tube group 3 and a second smoke tube group 4 having a large number of smoke tubes and different heat transfer areas.
It consists of and.
【０００７】また、後部煙室５に接続する改質ガス出配
管６、前部煙室１７に接続する燃焼排ガス出配管１４及
び後部煙室仕切り９により分離された後部煙室５と１０
を連絡するバイパス管１９にそれぞれオンオフ弁８、１
５、２０を配置している。Further, the reformed gas discharge pipe 6 connected to the rear smoke chamber 5, the combustion exhaust gas discharge pipe 14 connected to the front smoke chamber 17, and the rear smoke chambers 5 and 10 separated by the rear smoke chamber partition 9.
To the bypass pipes 19 that connect the
5 and 20 are arranged.
【０００８】このボイラの改質ガス２６の流れ及び燃焼
排ガス２７の流れは、オンオフ弁８、１５、２０の開閉
操作により図２に示すように、改質ガス２６は、ボイラ
を通りＣＯ変成器に至った後、再度ボイラを通過し、燃
焼排ガス２７は、ボイラからバイパス管１９を通り再度
ボイラを通過する。As shown in FIG. 2, the reformed gas 26 flow and the combustion exhaust gas 27 flow in the boiler pass through the boiler as shown in FIG. 2 by opening / closing the on / off valves 8, 15, 20. After that, the combustion exhaust gas 27 passes through the boiler again, and the combustion exhaust gas 27 passes through the bypass pipe 19 from the boiler and passes through the boiler again.
【０００９】次に図３は、従来の１パスボイラの１例を
示している。Next, FIG. 3 shows an example of a conventional one-pass boiler.
【００１０】同図に示すボイラの構造は、多数の煙管を
配したボイラ本体２１と前部煙室２、後部煙室２２とで
成っている。The structure of the boiler shown in the figure comprises a boiler main body 21 in which a large number of smoke tubes are arranged, a front smoke chamber 2 and a rear smoke chamber 22.
【００１１】また、後部煙室２２に接続する改質ガス流
路、燃焼排ガス流路のそれぞれにオンオフ弁８、１５を
配し、さらにガス入配管１とガス出配管６を連絡するバ
イパス管２３に、流量調整弁２４、オンオフ弁２５を配
置している。Further, on / off valves 8 and 15 are arranged in the reformed gas passage and the combustion exhaust gas passage connected to the rear smoke chamber 22, respectively, and a bypass pipe 23 connecting the gas inlet pipe 1 and the gas outlet pipe 6 is further provided. A flow rate adjusting valve 24 and an on / off valve 25 are arranged in the.
【００１２】このボイラの改質ガス２６の流れ及び燃焼
排ガス２７の流れは、オンオフ弁２５、８、１５の開閉
操作と流量調整弁２４の開度により図３に示すようにな
る。The flow of the reformed gas 26 and the flow of the combustion exhaust gas 27 in the boiler are as shown in FIG. 3 depending on the opening / closing operation of the on / off valves 25, 8, 15 and the opening of the flow rate adjusting valve 24.
【００１３】しかしながら、このような構成のボイラに
は、以下に説明する技術的課題があった。However, the boiler having such a structure has the following technical problems.
【００１４】[0014]
【発明が解決しようとする課題】すなわち、図２に示し
た構成のボイラでは、改質ガスが、第１煙管群からＣＯ
変成器を通過して第２煙管群へと廃熱ボイラを２パスす
るため供給ガス中の窒素酸化物の含有量が多くなる。さ
らに、下流側に位置するＣＯ変成器の改質ガス入温を変
成触媒の活性の都合により調整するために、クエンチン
グ水と蒸気の併用により調整していたため、触媒を保護
する目的でクエンチング水の純水装置が必要であった。That is, in the boiler having the structure shown in FIG. 2, the reformed gas is discharged from the first smoke tube group to CO
Since the waste heat boiler passes through the transformer to the second smoke tube group for two passes, the content of nitrogen oxides in the supply gas increases. Further, since the reforming gas input temperature of the CO shift converter located on the downstream side was adjusted by the combined use of quenching water and steam in order to adjust the temperature of the reforming gas depending on the activity of the shift catalyst, quenching was performed for the purpose of protecting the catalyst. A water purifier was required.
【００１５】また、図３に示した構成のボイラでは、バ
イパス管２３に通じる高温のガスと、多数の煙管を配し
たボイラ本体２１に通じる低温のガスを流量調整弁２４
で通過割合を可変させて混合することにより温度調整は
できるものの、高温のガスがバイパス管２３を通過する
ため耐熱性材料を使用した流量調整弁２４、もしくは冷
却装置を有するオンオフ弁２５が必要であった。さら
に、温度調整範囲を広くした場合、バイパス管２３の口
径が大きくなるなどの課題があった。Further, in the boiler having the structure shown in FIG. 3, the high temperature gas communicating with the bypass pipe 23 and the low temperature gas communicating with the boiler main body 21 having a large number of smoke pipes are used for the flow rate adjusting valve 24.
Although the temperature can be adjusted by varying and mixing the passage ratio with, the high temperature gas passes through the bypass pipe 23, so that a flow rate adjusting valve 24 using a heat resistant material or an on / off valve 25 having a cooling device is required. there were. Further, when the temperature adjustment range is widened, there is a problem that the diameter of the bypass pipe 23 becomes large.
【００１６】本発明は、このような従来の問題点を鑑み
てなされたものであり、その目的とするところは、ボイ
ラのバイパス管を配置することなく、また耐熱性材料を
使用したバイパス流量調整弁を使用せず、さらにオンオ
フ弁に冷却装置を配置することなく、希望する改質ガス
温度をボイラ出側で得ることにより、ボイラの下流側の
ＣＯ変成器に対して適正なガス温度に容易にでき得るボ
イラを提供することにある。The present invention has been made in view of such conventional problems, and an object thereof is to adjust a bypass flow rate using a heat resistant material without disposing a bypass pipe of a boiler. By obtaining the desired reformed gas temperature on the boiler outlet side without using a valve and without arranging a cooling device on the on / off valve, it is easy to obtain an appropriate gas temperature for the CO transformer downstream of the boiler. To provide a boiler that can
【００１７】[0017]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、図１に示すような構成を成している。In order to achieve the above object, the present invention has a structure as shown in FIG.
【００１８】改質ガス２６の流路として伝熱面積の小さ
い第１煙管群３と伝熱面積の大きい第２煙管群４を設
け、後部煙室のみに後部煙室仕切り９を入れ後部煙室
５、１０に分離した。さらに、後部煙室５、１０に接続
する配管６、１１に流量調整弁７、１２及びオンオフ弁
８、１３を配置し、燃焼排ガス２７の流路として、後部
煙室１０に接続する配管１４にオンオフ弁１５を配置し
た。The first smoke pipe group 3 having a small heat transfer area and the second smoke pipe group 4 having a large heat transfer area are provided as the flow path of the reformed gas 26, and the rear smoke chamber partition 9 is inserted only in the rear smoke chamber. It was separated into 5 and 10. Further, the flow rate adjusting valves 7 and 12 and the on / off valves 8 and 13 are arranged in the pipes 6 and 11 connected to the rear smoke chambers 5 and 10, and the pipe 14 connected to the rear smoke chamber 10 is used as a flow path of the combustion exhaust gas 27. The on-off valve 15 was arranged.
【００１９】このような配置にすることで、本発明で
は、改質ガス２６は、オンオフ弁１５を閉、オンオフ弁
８、弁１３を開とすることで、ガス入配管１より前部煙
室２を通り、流量調整弁７と１２の開度調整により、一
方は、第１煙管群３から後部煙室５、改質ガス出配管６
へと、また他方は、第２煙管群４から後部煙室１０、バ
イパス配管１１、改質ガス出配管６へと流れる。With such an arrangement, in the present invention, the reformed gas 26 closes the on / off valve 15 and opens the on / off valve 8 and the valve 13 to open the smoke chamber in front of the gas inlet pipe 1. 2 through the flow rate adjusting valves 7 and 12 by adjusting the opening degree of the flow rate adjusting valves 7 and 12;
And the other flow from the second smoke pipe group 4 to the rear smoke chamber 10, the bypass pipe 11, and the reformed gas discharge pipe 6.
【００２０】この時、伝熱面積の小さい第１煙管群３を
通過した高温のガスと伝熱面積の大きい第２煙管群４を
通過した低温のガスが配管６で混合し、伝熱面積の異な
る煙管群の通過割合により希望する改質ガス温度が得ら
れる。At this time, the high-temperature gas passing through the first smoke tube group 3 having a small heat transfer area and the low-temperature gas passing through the second smoke tube group 4 having a large heat transfer area are mixed in the pipe 6 and the heat transfer area The desired reformed gas temperature can be obtained by passing through different smoke tubes.
【００２１】また、燃焼排ガス２７は、オンオフ弁１５
を開、オンオフ弁８、オンオフ弁１３を閉とすること
で、ガス入配管１より前部煙室２を通り、第２煙管群
４、後部煙室１０、燃焼排ガス出配管１４へと流れる。Further, the combustion exhaust gas 27 is supplied to the on / off valve 15
And the on / off valve 8 and the on / off valve 13 are closed, the gas flows from the gas inlet pipe 1 through the front smoke chamber 2 to the second smoke pipe group 4, the rear smoke chamber 10, and the combustion exhaust gas outlet pipe 14.
【００２２】こうした構造にすることにより、希望する
改質ガス温度を得るとともに、燃焼排ガスの熱回収も充
分できることを特徴とする。With such a structure, it is possible to obtain a desired reformed gas temperature and to sufficiently recover the heat of the combustion exhaust gas.
【００２３】[0023]
【発明の作用効果】上記構成のガス改質用廃熱煙管ボイ
ラによれば、改質ガス全量を伝熱面積の小さい第１煙管
群に通過させた場合の温度を上限とし、改質ガス全量を
伝熱面積の大きい第２煙管群を通過させた場合の温度を
下限とする温度範囲で通過量を調整することにより任意
の改質ガス温度がボイラ出側において得ることができ
る。According to the waste heat smoke tube boiler for gas reforming having the above structure, the total amount of the reformed gas is set to the upper limit when the total amount of the reformed gas is passed through the first smoke tube group having a small heat transfer area. An arbitrary reformed gas temperature can be obtained on the outlet side of the boiler by adjusting the passing amount in a temperature range having a lower limit of the temperature when passing through the second smoke tube group having a large heat transfer area.
【００２４】よって、クエンチング水を用いることなく
ＣＯ変成器入側の改質ガス温度を調整でき、また外バイ
パス方式より温度条件が緩和された流量調整弁、オンオ
フ弁が使用できる。Therefore, the temperature of the reformed gas on the inlet side of the CO shift converter can be adjusted without using quenching water, and a flow rate adjusting valve and an on / off valve whose temperature conditions are relaxed compared to the external bypass system can be used.
【００２５】また、１パス方式としたことで供給ガス中
の窒素酸化物の低減も図ることができるなどの効果を有
する。Further, by adopting the one-pass system, it is possible to reduce nitrogen oxide in the supply gas.
【００２６】[0026]
【実施例】以下、この発明の好適な実施例について添付
図を参照して詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.
【００２７】図１は、この発明にかかるガス改質用廃熱
煙管ボイラの一実施例を示している。FIG. 1 shows an embodiment of a waste heat smoke tube boiler for gas reforming according to the present invention.
【００２８】同図に示すガス改質用廃熱煙管ボイラで
は、第１煙管群３の伝熱面積を改質ガス２６が全量通過
したときの希望する最高温度４５０℃に成るようにし、
第２煙管群４の伝熱面積は改質ガス２６が全量通過した
ときの希望する温度２０５℃に成るようにした。この
時、伝熱面積の比は、第１煙管群３を１００としたと
き、第２煙管群４は、２８４となった。In the waste heat smoke tube boiler for gas reforming shown in the figure, the desired maximum temperature of 450 ° C. when the entire amount of the reformed gas 26 passes through the heat transfer area of the first smoke tube group 3 is set,
The heat transfer area of the second smoke tube group 4 was set to a desired temperature of 205 ° C. when the entire amount of the reformed gas 26 passed. At this time, the ratio of the heat transfer areas was 284 for the second smoke tube group 4 when the first smoke tube group 3 was 100.
【００２９】さらに、改質ガス２６については、２つの
流量調整弁７、１２の開度調整により第１煙管群３に改
質ガス全量の８０％、第２煙管群４に２０％を通過させ
た場合、配管６での混合温度は３９３℃となる。Further, with respect to the reformed gas 26, 80% of the total amount of the reformed gas is passed through the first smoke pipe group 3 and 20% is passed through the second smoke pipe group 4 by adjusting the openings of the two flow rate adjusting valves 7 and 12. In that case, the mixing temperature in the pipe 6 is 393 ° C.
【００３０】また、改質ガス全量の５０％づつを第１、
第２煙管群に通過させた場合、配管６での混合温度は３
２９℃となる。In addition, 50% of the total amount of reformed gas is set to the first,
When passing through the second smoke tube group, the mixing temperature in the pipe 6 is 3
It becomes 29 ° C.
【００３１】このように、第１煙管群と第２煙管群に改
質ガスを通過させる割合を可変させることにより上限
は、４５０℃から、下限は２０５℃までの任意の希望す
る温度の改質ガスが得られる。As described above, by changing the ratio of the reformed gas passing through the first smoke tube group and the second smoke tube group, the upper limit of 450 ° C. and the lower limit of 205 ° C. are reformed at any desired temperature. Gas is obtained.
【００３２】また、このガス改質用廃熱煙管ボイラの蒸
気は、改質ガスの混合後の温度に比例した発生量を得る
ことが出来る。Further, the steam of the waste heat smoke tube boiler for gas reforming can be generated in an amount proportional to the temperature of the reformed gas after mixing.
【図１】本発明にかかるガス改質用廃熱煙管ボイラの一
実施例を示す概略断面図。FIG. 1 is a schematic sectional view showing an embodiment of a waste heat smoke tube boiler for gas reforming according to the present invention.
【図２】従来の２パスボイラの一実施例を示す概略断面
図。FIG. 2 is a schematic sectional view showing an example of a conventional two-pass boiler.
【図３】従来の１パスボイラの一実施例を示す概略断面
図。FIG. 3 is a schematic sectional view showing an example of a conventional one-pass boiler.
１ ガス入配管 ２ 前部煙室 ３ 第１煙管群 ４ 第２煙管群 ５ 後部煙室 ６ 改質ガス出配管 ７ 流量調整弁 ８ オンオフ弁 ９ 後部煙室仕切り １０ 後部煙室 １１ バイパス配管 １２ 流量調整弁 １３ オンオフ弁 １４ 燃焼排ガス出配管 １５ オンオフ弁 ２６ 改質ガス ２７ 燃焼排ガス 1 gas inlet pipe 2 front smoke chamber 3 first smoke pipe group 4 second smoke pipe group 5 rear smoke chamber 6 reformed gas outlet pipe 7 flow control valve 8 on-off valve 9 rear smoke chamber partition 10 rear smoke chamber 11 bypass pipe 12 flow rate Regulator valve 13 On-off valve 14 Combustion exhaust gas discharge pipe 15 On-off valve 26 Reformed gas 27 Combustion exhaust gas
Claims (2)
応器の下流側に位置する廃熱ボイラにおいて、２室に分
離された後部煙室５、１０下流の改質ガス流路それぞれ
に流量調整弁７、１２とオンオフ弁８、１３を配置し、
かつ後部煙室１０下流の燃焼排ガス流路にオンオフ弁１
５を配置して成る構成を特徴とするガス改質用廃熱煙管
ボイラ。 【０００２】1. A waste heat boiler located on the downstream side of a reactor in a cyclic gas producing apparatus, a rear smoke chamber 5 separated into two chambers, and a flow rate adjusting valve 7 in each of a reformed gas flow channel downstream. , 12 and on / off valves 8, 13 are arranged,
And the on-off valve 1 in the combustion exhaust gas flow path downstream of the rear smoke chamber 10
5. A waste heat smoke tube boiler for gas reforming, characterized in that 5 are arranged. [0002]
に配置された３個のオンオフ弁８、１３、１５の操作と
２個の流量調整弁７、１２の開度により、第１煙管群
３、第２煙管群４の双方、もしくは片方に通過させるこ
とができ、さらに燃焼排ガス２７は後部煙室５、１０下
流側に配置された３個のオンオフ弁８、１３、１５の操
作によって、第２煙管群４のみに通過させることを特徴
とする請求項１記載のガス改質用廃熱煙管ボイラ。2. The reformed gas 26 is controlled by operating three on / off valves 8, 13 and 15 arranged downstream of the rear smoke chambers 5 and 10 and opening degrees of the two flow rate adjusting valves 7 and 12. The first smoke pipe group 3 and the second smoke pipe group 4, or one of them can be passed, and the combustion exhaust gas 27 is further discharged from the three on-off valves 8, 13, 15 arranged downstream of the rear smoke chamber 5, 10. The waste heat smoke tube boiler for gas reforming according to claim 1, wherein only the second smoke tube group 4 is allowed to pass by operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7552392A JP2514521B2 (en) | 1992-02-25 | 1992-02-25 | Waste heat smoke tube boiler for gas reforming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7552392A JP2514521B2 (en) | 1992-02-25 | 1992-02-25 | Waste heat smoke tube boiler for gas reforming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06109204A true JPH06109204A (en) | 1994-04-19 |
| JP2514521B2 JP2514521B2 (en) | 1996-07-10 |
Family
ID=13578680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7552392A Expired - Fee Related JP2514521B2 (en) | 1992-02-25 | 1992-02-25 | Waste heat smoke tube boiler for gas reforming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2514521B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155328A (en) * | 2005-12-01 | 2007-06-21 | Alstom Technology Ltd | Waste heat boiler |
| JP2016153715A (en) * | 2015-02-20 | 2016-08-25 | 三菱重工業株式会社 | Economizer, composite boiler and their methods of application |
| WO2021258647A1 (en) * | 2020-06-23 | 2021-12-30 | 江苏太湖锅炉股份有限公司 | Natural circulation box structure for ferrosilicon waste heat boiler |
-
1992
- 1992-02-25 JP JP7552392A patent/JP2514521B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007155328A (en) * | 2005-12-01 | 2007-06-21 | Alstom Technology Ltd | Waste heat boiler |
| JP4591839B2 (en) * | 2005-12-01 | 2010-12-01 | アルストーム・テクノロジー・リミテッド | Waste heat boiler |
| JP2016153715A (en) * | 2015-02-20 | 2016-08-25 | 三菱重工業株式会社 | Economizer, composite boiler and their methods of application |
| WO2021258647A1 (en) * | 2020-06-23 | 2021-12-30 | 江苏太湖锅炉股份有限公司 | Natural circulation box structure for ferrosilicon waste heat boiler |
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| Publication number | Publication date |
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| JP2514521B2 (en) | 1996-07-10 |
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