JP4970949B2 - 水蒸気改質装置及びそれを用いた水蒸気改質方法並びに工業炉 - Google Patents
水蒸気改質装置及びそれを用いた水蒸気改質方法並びに工業炉 Download PDFInfo
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Description
ス=1:10〜4:1の範囲であることが好ましい。およそ600℃から輻射熱は発生し始めるが、温度が低いときは輻射熱はほとんど発生せず、対流熱の約10分の1程度である。800℃では、全加熱量に占める輻射熱の割合が60%、1000℃以上では輻射熱の割合が80%となる。また、高温になればなるほど輻射熱が優勢になる。
Claims (11)
- 工業炉内に配置され、内部に流入する炭化水素及び水蒸気を原料として、内部に水蒸気改質反応を促進する改質触媒を充填した金属製反応管又はセラミックス製反応管を有する低温改質部と、内部で前記水蒸気改質反応を生じさせる改質触媒を存在させないセラミックス製反応管を有する高温改質部とを備え、前記低温改質部が600℃以上、1000℃未満となる位置に配置され、前記高温改質部が1000℃以上、1800℃以下となる位置に配置されて水蒸気改質反応を生じさせる水蒸気改質装置。
- 前記セラミックス製反応管の材料が、窒化珪素、炭化珪素、窒化アルミニウム、酸化アルミニウム及び酸化ジルコニウムからなる群から選ばれる少なくとも一種である請求項1に記載の水蒸気改質装置。
- 請求項1又は2に記載の水蒸気改質装置を、前記工業炉の燃焼熱により600℃以上、1000℃未満となる位置に前記低温改質部を配置し、前記工業炉の燃焼熱により1000℃以上、1800℃以下となる位置に前記高温改質部を配置するように前記工業炉に配設して前記水蒸気改質反応を生じさせる水蒸気改質方法。
- 流入した炭化水素を含む燃料を燃焼させて燃焼ガスを発生させる燃焼装置と、その内部に搬入された被加熱体を加熱して焼成又は燃焼するとともに、焼成又は燃焼後の燃焼ガスを外部に排出する工業炉本体と、前記工業炉本体から排出される前記燃焼ガスの流路となる排ガス排出部とを備える工業炉であって、
請求項1又は2に記載の水蒸気改質装置を、前記工業炉の燃焼熱により600℃以上、1000℃未満となる位置に前記低温改質部が配置され、前記工業炉の燃焼熱により1000℃以上、1800℃以下となる位置に前記高温改質部が配置されるようにして、前記工業炉本体内及び/又は前記排ガス排出部内に更に備える工業炉。 - 前記燃焼熱の一部が、前記燃焼ガスが前記金属製反応管及び前記セラミック製反応管に直接接触して前記金属製反応管及び前記セラミック製反応管が受ける熱、及び前記燃焼ガスが前記工業炉内を加熱することにより工業炉内に発生する輻射熱のうち前記金属製反応管及び前記セラミック製反応管が受ける熱である請求項4に記載の工業炉。
- 水素と酸素との反応、又は水素と酸素との反応及び水素と二酸化炭素との反応により発電する燃料電池を更に備え、前記改質ガスに含有される水素の一部又は全部を燃料電池用水素として、前記燃料電池での酸素、又は酸素及び二酸化炭素との反応に用いる請求項4又は5に記載の工業炉。
- 前記水蒸気改質装置で生成した前記改質ガスを内部に流入させて前記改質ガスの中の前記水素を選択的に分離して水素を主成分とする水素燃料と二酸化炭素を含有する残留ガスとに分離させる水素分離器を更に備える請求項4〜6のいずれかに記載の工業炉。
- 前記水素分離器で分離された前記残留ガスの中の二酸化炭素を固定化させる二酸化炭素固定器を更に備える請求項4〜7のいずれかに記載の工業炉。
- 前記工業炉が焼成炉であり、前記工業炉(焼成炉)本体が、前記被加熱体(被焼成体)を連続的にその内部に搬入し、前記被焼成体を内部で加熱した後に連続的にその外部に搬出する連続式焼成炉本体である請求項4〜8のいずれかに記載の工業炉。
- 前記工業炉が焼成炉であり、前記被加熱体(被焼成体)の材質がセラミックである請求項4〜9のいずれかに記載の工業炉。
- 前記工業炉が焼成炉であり、前記被加熱体(被焼成体)がハニカム構造体である請求項4〜10のいずれかに記載の工業炉。
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