JPH0348121B2 - - Google Patents
Info
- Publication number
- JPH0348121B2 JPH0348121B2 JP59121079A JP12107984A JPH0348121B2 JP H0348121 B2 JPH0348121 B2 JP H0348121B2 JP 59121079 A JP59121079 A JP 59121079A JP 12107984 A JP12107984 A JP 12107984A JP H0348121 B2 JPH0348121 B2 JP H0348121B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- catalyst
- combustion
- shift converter
- partition plate
- 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 - Lifetime
Links
- 239000003054 catalyst Substances 0.000 claims description 41
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 claims description 24
- 239000004215 Carbon black (E152) Substances 0.000 claims description 14
- 229930195733 hydrocarbon Natural products 0.000 claims description 14
- 150000002430 hydrocarbons Chemical class 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 61
- 238000010438 heat treatment Methods 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- -1 methane hydrocarbon Chemical class 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
- C21D1/763—Adjusting the composition of the atmosphere using a catalyst
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hydrogen, Water And Hydrids (AREA)
- Furnace Details (AREA)
Description
本発明は、加熱炉において使用する熱処理用保
護雰囲気ガスの発生装置に関するものである。
従来、加熱炉における金属の保護雰囲気ガス
は、メタン形炭化水素ガスと空気との混合ガスを
吸熱型ガス発生用触媒に通して変成することによ
り生成しており、例えば鉄の保護雰囲気は前記混
合ガスを、加熱装置により1050℃以上に加熱して
触媒を通して変成生成されている。
しかしながら、従来の保護雰囲気ガスの発生装
置では、触媒を加熱するための加熱装置は、この
触媒加熱以外の目的には使用されておらず省エネ
ルギー上、不効率なものとなつていた。また、触
媒に送り込むメタン系炭化水素ガスを多量に必要
とする上、触媒の加熱温度も高温を必要とするも
のであつた。
この発明は、上記事情に鑑みてなされたもので
あつて、ほご雰囲気ガスの生成において使用され
る触媒の加熱装置を有効に利用できるようにする
と共にメタン系炭化水素ガスの必要量を減少させ
且つ触媒の加熱温度を低下させるところの雰囲気
ガス発生装置を提供することを目的としており、
中空なる変成器本体内に下部を連通するようにし
て内設した有底燃焼筒内に、下部を連通するよう
にして内筒を設けると共に、該内筒内にガス燃焼
バーナーを装備し、更に上記燃焼筒の外周側壁
と、変成器本体の内周側壁との間に、吸熱型ガス
発生用触媒を充填した触媒室を設け、且つ該触媒
室を仕切板で２分割するようにした変成器を形成
し、前記燃焼筒と接続し燃焼筒における燃焼排ガ
スを変成器外へ送り出す排ガス管を設け、この排
ガス管とメタン系炭化水素ガスを送り込む生ガス
管を連結し、この連結部と前記変成器内の仕切板
によつて分割された一方の触媒室とを接続して、
排ガスとメタン系炭化水素ガスの混入ガスを触媒
内に送り込む混入ガス管を設け、前記触媒によつ
て変成された雰囲気ガスを、有底燃焼筒の下方を
通り、仕切板によつて分割された他方の触媒室を
通り変成器外へ送り出す送出管を、変成器本体上
部に設けてなることを特徴とする雰囲気ガス発生
装置を要旨としている。
以下、本発明による雰囲気ガス発生装置を図示
した実施例に基づいて説明する。
第１図及び第２図は本発明による雰囲気ガス発
生装置の一実施例を示している。１は変成器であ
り、１ａはこの変成器１の本体であつて、該本体
１ａはレンガ等の外壁１ｂによつて囲まれた中空
なるものである。この変成器本体１ａ内に下部を
連通するようにして内設した有底燃焼筒２内に、
下部を連通するようにして内筒２ａを設けると共
に、該内筒２ａ内にガス燃焼バーナー３を装備
し、更に上記燃焼筒２の外周側壁２ｂと、変成器
本体１ａの内周側壁１ｃとの間に、吸熱型ガス発
生用触媒を充填した触媒室４ａ，４ｂを設け、且
つ該触媒室を仕切板５で２分割するようにしてあ
る。
前記燃焼筒２と接続し、該燃焼筒２における燃
焼排ガスを変成器１外へ送り出す排ガス管６を設
け、この排ガス管６とメタン系炭化水素ガスを送
り込む生ガス管７を連結し、この連結部８と前記
変成器内の仕切板５によつて分割された一方の触
媒室４ａとを接続して、排ガスとメタン系炭化水
素ガスの混入ガスを触媒内に送り込む混入ガス管
９を設け、前記触媒によつて変成された雰囲気ガ
スを、有底燃焼筒２の下方を通り、仕切板５によ
つて分割された他方の触媒室４ｂを通り変成器外
へ送り出す送出管１０を、変成器本体１ａ上部に
設けてある。
上記バーナー３には混合ガス管１１が接続さ
れ、プロパンやプタン等のメタン系炭化水素ガス
と空気の混合ガスをバーナー３に送り込んでい
る。また、仕切板５によつて仕切られた第一触媒
室４ａ及び第二触媒室４ｂには、それぞ前記燃焼
筒２により加熱される吸熱型ガス発生用触媒が充
填されており、下方部分は空間部分となつてい
る。
尚、生ガス管７から送り込まれるメタン系炭化
水素ガスの量は、加熱炉の雰囲気のカーボンポテ
ンシヤルをフイードバツクすることによりその雰
囲気に合わせて調整されている。
上記構成のように、本発明に係る雰囲気ガス発
生装置は、触媒室４ａ，４ｂが変成器１の外壁１
ｂと接した構造となつているため、触媒の吸熱反
応に要した熱量の余裕分を外部に発散することが
できる。
したがつて第３図に示すように、コンベアー式
の連続光輝焼入炉Ａのワーク加熱終端部等に取り
つけることにより、炉Ａの保温に寄与することが
できる。更に、第３図のようにして使用すれば、
発生した雰囲気ガスを送り出す送出管１０の配管
距離が短くてすむと言う利点もある。
次表は、触媒の変成温度780℃〜950℃において
上述したごとき本発明の実施例に用いた装置によ
つて生成された雰囲気ガスの成分を示す実験値で
ある。
The present invention relates to an apparatus for generating a protective atmosphere gas for heat treatment used in a heating furnace. Conventionally, a protective atmosphere gas for metals in a heating furnace is generated by passing a mixed gas of methane-type hydrocarbon gas and air through an endothermic gas generation catalyst to transform it. Gas is heated to 1,050°C or higher using a heating device and then passed through a catalyst to generate metamorphosed gas. However, in conventional protective atmosphere gas generators, the heating device for heating the catalyst is not used for purposes other than heating the catalyst, making it inefficient in terms of energy conservation. In addition, a large amount of methane-based hydrocarbon gas is required to be fed to the catalyst, and the heating temperature of the catalyst is also required to be high. The present invention has been made in view of the above circumstances, and makes it possible to effectively utilize a heating device for a catalyst used in the production of cold atmosphere gas, and to reduce the amount of methane-based hydrocarbon gas required. The purpose of the present invention is to provide an atmospheric gas generator that lowers the heating temperature of the catalyst.
A bottomed combustion cylinder is provided inside the hollow transformer main body so that the lower part communicates with the inner cylinder, and a gas combustion burner is installed in the inner cylinder, and further A shift converter in which a catalyst chamber filled with an endothermic gas generation catalyst is provided between the outer circumferential side wall of the combustion cylinder and the inner circumferential side wall of the shift converter body, and the catalyst chamber is divided into two by a partition plate. An exhaust gas pipe is provided which is connected to the combustion tube and sends the combustion exhaust gas in the combustion tube out of the shift converter, and this exhaust gas pipe is connected to a raw gas pipe which feeds methane-based hydrocarbon gas, and this connecting portion and the shift converter are connected to each other. By connecting one of the catalyst chambers divided by a partition plate inside the vessel,
A mixed gas pipe is provided to send mixed gas of exhaust gas and methane-based hydrocarbon gas into the catalyst, and the atmospheric gas transformed by the catalyst passes below the bottomed combustion tube and is divided by a partition plate. The gist of the present invention is an atmospheric gas generator characterized in that a delivery pipe for sending the gas out of the shift converter through the other catalyst chamber is provided in the upper part of the shift converter main body. DESCRIPTION OF THE PREFERRED EMBODIMENTS The atmospheric gas generator according to the present invention will be described below based on illustrated embodiments. FIGS. 1 and 2 show an embodiment of an atmospheric gas generator according to the present invention. 1 is a transformer, and 1a is a main body of the transformer 1, and the main body 1a is hollow surrounded by an outer wall 1b made of brick or the like. In the bottomed combustion tube 2 installed inside the transformer main body 1a so that the lower part communicates,
An inner cylinder 2a is provided so that the lower part thereof communicates with each other, and a gas combustion burner 3 is installed in the inner cylinder 2a, and the outer peripheral side wall 2b of the combustion cylinder 2 and the inner peripheral side wall 1c of the transformer main body 1a are connected. Catalyst chambers 4a and 4b filled with an endothermic gas generating catalyst are provided between them, and the catalyst chambers are divided into two by a partition plate 5. An exhaust gas pipe 6 is provided which is connected to the combustion tube 2 and sends out the combustion exhaust gas in the combustion tube 2 to the outside of the transformer 1, and this exhaust gas pipe 6 is connected to a raw gas pipe 7 which feeds methane-based hydrocarbon gas. A mixed gas pipe 9 is provided which connects the part 8 and one catalyst chamber 4a divided by the partition plate 5 in the shift converter, and sends mixed gas of exhaust gas and methane hydrocarbon gas into the catalyst. A delivery pipe 10 that sends the atmospheric gas transformed by the catalyst to the outside of the transformer passes through the bottom of the bottomed combustion tube 2, passes through the other catalyst chamber 4b divided by the partition plate 5, and is connected to the shift converter. It is provided on the upper part of the main body 1a. A mixed gas pipe 11 is connected to the burner 3, and a mixed gas of a methane-based hydrocarbon gas such as propane or butane and air is sent to the burner 3. Further, the first catalyst chamber 4a and the second catalyst chamber 4b, which are partitioned by the partition plate 5, are each filled with an endothermic gas generation catalyst heated by the combustion tube 2, and the lower part is It is part of the space. The amount of methane-based hydrocarbon gas sent from the raw gas pipe 7 is adjusted according to the atmosphere of the heating furnace by feeding back the carbon potential of the atmosphere. As configured above, in the atmospheric gas generator according to the present invention, the catalyst chambers 4a and 4b are connected to the outer wall 1 of the shift converter 1.
Since the structure is in contact with b, the excess amount of heat required for the endothermic reaction of the catalyst can be dissipated to the outside. Therefore, as shown in FIG. 3, by attaching it to the workpiece heating end of the conveyor-type continuous bright quenching furnace A, it is possible to contribute to keeping the furnace A warm. Furthermore, if you use it as shown in Figure 3,
There is also the advantage that the piping distance of the delivery pipe 10 for sending out the generated atmospheric gas can be shortened. The following table shows experimental values showing the composition of the atmospheric gas produced by the apparatus used in the embodiments of the invention as described above at catalyst transformation temperatures of 780 DEG C. to 950 DEG C.
【表】
表に示すようにCO2の含有量は１％以内、H2O
の露点温度は10℃以内の数値を示しており、加熱
炉の雰囲気として十分良好な数値となつており、
従来のように触媒にメタン系炭化水素ガスと水素
の混合ガスを送り込み1050℃以上で加熱変成した
場合の数値と比べ何等遜色の内数値となつてい
る。
以上、上記で説明したように本発明に係る雰囲
気ガス発生装置によれば、触媒室が変成器１の外
壁と接した構造となつているため、触媒の吸熱反
応に要した熱量の余裕分を外部に発散することが
できる。したがつてコンベアー式の連続光輝焼入
炉のワーク加熱終端部等に取り付けることによ
り、炉の保温に寄与することができる。
また、従来触媒の加熱以外に利用されていなか
つた触媒用加熱装置を有効に利用し、この加熱装
置の排ガスを雰囲気ガス生成の原料として用いる
ようにしたから、省エネルギーに著しい効果を奏
することができる。又、雰囲気カスを発生させる
ために必要とするメタン系炭化水素ガスの使用量
を極めて少量にすることができ、しかも触媒にお
ける雰囲気ガスへの変成（吸熱反応）に必要な温
度も従来に比べて遥かに低い温度でよい。従つ
て、この面からも省エネルギー上著しい効果を奏
することができ、且つ発生される雰囲気ガスは極
めて良質なものである。
尚、本発明装置により発生する雰囲気ガスに少
量のメタン系炭化水素ガスを添加することとによ
り浸炭雰囲気を容易に生成できる。[Table] As shown in the table, the content of CO 2 is within 1%, and the content of H 2 O
The dew point temperature is within 10℃, which is a good enough value for the atmosphere of the heating furnace.
These values are in a way inferior to the values obtained when a mixed gas of methane-based hydrocarbon gas and hydrogen is fed into the catalyst and heated to 1050°C or higher for transformation as in the past. As explained above, according to the atmospheric gas generator according to the present invention, the catalyst chamber is in contact with the outer wall of the shift converter 1, so that the excess amount of heat required for the endothermic reaction of the catalyst can be reduced. It can be released to the outside. Therefore, by attaching it to the workpiece heating end of a conveyor-type continuous bright quenching furnace, it can contribute to keeping the furnace warm. In addition, the catalyst heating device, which was conventionally not used for anything other than heating the catalyst, is effectively used, and the exhaust gas from this heating device is used as a raw material for generating atmospheric gas, resulting in a significant energy saving effect. . In addition, the amount of methane-based hydrocarbon gas required to generate atmospheric gas can be reduced to an extremely small amount, and the temperature required for conversion to atmospheric gas (endothermic reaction) in the catalyst is also lower than in the past. A much lower temperature is sufficient. Therefore, from this point of view as well, a remarkable effect can be achieved in terms of energy saving, and the atmospheric gas generated is of extremely high quality. Note that a carburizing atmosphere can be easily generated by adding a small amount of methane-based hydrocarbon gas to the atmospheric gas generated by the apparatus of the present invention.
第１図は本発明装置の一実施例の縦断面説明
図、第２図は第１図のＸ−Ｘ断面図、第３図は本
発明装置の使用状態説明図。
１……変成器、１ａ……変成器本体、２……燃
焼筒、３……ガス燃焼バーナー、４ａ，４ｂ……
触媒室、５……仕切板。
FIG. 1 is an explanatory longitudinal cross-sectional view of one embodiment of the apparatus of the present invention, FIG. 2 is a cross-sectional view taken along line XX in FIG. 1, and FIG. 3 is an explanatory view of the use state of the apparatus of the present invention. 1...Transformer, 1a...Transformer main body, 2...Combustion tube, 3...Gas combustion burner, 4a, 4b...
Catalyst chamber, 5... partition plate.
Claims (1)
にして内設した有底燃焼筒内に、下部を連通する
ようにして内筒を設けると共に、該内筒内にガス
燃焼バーナーを装備し、更に上記燃焼筒の外周側
壁と、変成器本体の内周側壁との間に、吸熱型ガ
ス発生用触媒を充填した触媒室を設け、且つ該触
媒室を仕切板で２分割するようにした変成器を形
成し、前記燃焼筒と接続した燃焼筒における燃焼
排ガスを変成器外へ送り出す排ガス管を設け、こ
の排ガス管とメタン系炭化水素ガスを送り込む生
ガス管を連結し、この連結部と前記変成器内の仕
切板によつて分割された一方の触媒室とを接続し
て、排ガスとメタン系炭化水素ガスの混入ガスを
触媒内に送り込む混入ガス管を設け、前記触媒に
よつて変成された雰囲気ガスを、有底燃焼筒の下
方を通り、仕切板によつて分割された他方の触媒
室を通り変成器外へ送り出す送出管を、変成器本
体上部に設けてなる雰囲気ガス発生装置。1. An inner cylinder is provided in a bottomed combustion cylinder so that the lower part communicates with the inside of the hollow transformer main body, and a gas combustion burner is installed in the inner cylinder, Furthermore, a catalyst chamber filled with an endothermic gas generation catalyst is provided between the outer peripheral side wall of the combustion cylinder and the inner peripheral side wall of the shift converter body, and the catalyst chamber is divided into two by a partition plate. An exhaust gas pipe is provided to send the combustion exhaust gas from the combustion cylinder connected to the combustion cylinder to the outside of the transformer, and this exhaust gas pipe is connected to a raw gas pipe for feeding methane-based hydrocarbon gas, and this connecting part and the above-mentioned A mixed gas pipe is provided that connects one of the catalyst chambers divided by a partition plate in the shift converter and sends mixed gas of exhaust gas and methane-based hydrocarbon gas into the catalyst. This atmospheric gas generator is provided with a delivery pipe in the upper part of the shift converter body that sends the atmospheric gas out of the shift converter through the bottom of the bottomed combustion cylinder, through the other catalyst chamber divided by a partition plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12107984A JPS61516A (en) | 1984-06-12 | 1984-06-12 | Atmospheric gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12107984A JPS61516A (en) | 1984-06-12 | 1984-06-12 | Atmospheric gas generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61516A JPS61516A (en) | 1986-01-06 |
| JPH0348121B2 true JPH0348121B2 (en) | 1991-07-23 |
Family
ID=14802331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12107984A Granted JPS61516A (en) | 1984-06-12 | 1984-06-12 | Atmospheric gas generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61516A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0424240Y2 (en) * | 1986-04-16 | 1992-06-08 | ||
| DE3632577A1 (en) * | 1986-09-25 | 1988-05-05 | Linde Ag | JET PIPE BURNER WITH CATALYST BED FOR HEAT TREATMENT OVENS |
| JP4488782B2 (en) * | 2004-04-02 | 2010-06-23 | 中外炉工業株式会社 | Carburizing gas production equipment |
| US8697759B1 (en) * | 2012-10-09 | 2014-04-15 | University Of Southern California | Efficient, self sufficient production of methanol from a methane source via oxidative bi-reforming |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5654204A (en) * | 1979-10-12 | 1981-05-14 | Kanto Yakin Kogyo Kk | Atmospheric gas generator for heat treatment |
-
1984
- 1984-06-12 JP JP12107984A patent/JPS61516A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5654204A (en) * | 1979-10-12 | 1981-05-14 | Kanto Yakin Kogyo Kk | Atmospheric gas generator for heat treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61516A (en) | 1986-01-06 |
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