඘ሸᒙᆺ㒊ศ⁐⼥㑏ඖࣉࣟࢭࢫゎᯒࣔࢹࣝࡢ㛤Ⓨ◊✲௦⾲⪅ᮾ໭኱Ꮫ ከඖ≀㉁⛉Ꮫ◊✲ᡤ ຓᩍ ୸ᒸఙὒඹྠ◊✲⪅ᮾ໭኱Ꮫ ከඖ≀㉁⛉Ꮫ◊✲ᡤ ᩍᤵ ᇣୖ ὒ1㸬⥴ゝ ᪥ᮏࡢ㕲㗰ᴗࡣ࢚ࢿࣝࢠ࣮ከᾘ㈝⏘ᴗ࡛ࠊࡑࡢ CO2 ᤼ฟ㔞ࡣ᪥ᮏ඲యࡢᖺ㛫᤼ฟ㔞ࡢ⣙13%ࢆࡋࡵࡿࠋ௒ᚋࡉࡽ࡞ࡿ CO2 ๐ῶࡀồࡵࡽࢀࡿࡇ࡜ࡀண᝿ࡉࢀࠊ㕲㗰ᴗ඲యࡢ⣙ 7 ๭ࡢ࢚ࢿࣝࢠ࣮ࢆᾘ㈝ࡍࡿ㕲㖔▼୺㑏ඖࣉࣟࢭࢫ࡛࠶ࡿ㧗⅔࠿ࡽࡢ CO2 ᤼ฟ๐ῶࡢἼཬຠᯝࡣࡁࢃࡵ࡚኱ࡁ࠸ࠋ⌧ᅾࡲ࡛࡟㧗⅔⿦ධ≀ࡢᛶ≧࣭ศᕸࠊᚤ⢊ⅣࡸⅣᮦ௦᭰ࡢ྿ࡁ㎸ࡳ࡞࡝ࡢᐇ㦂ⓗ᳨ウ࡜࡜ࡶ࡟✀ࠎࡢᩘ್ィ⟬࡟ࡼࡿゎᯒࡀ⾜ࢃࢀ࡚࠾ࡾࠊࢥ࣮ࢡࢫẚ࡞࡝⌮ㄽ㝈⏺ࢆ㐩ᡂࡋࡘࡘ࠶ࡿࠋࡉࡽ࡞ࡿ CO2 ᤼ฟ๐ῶࡢࡓࡵ࡟ࡣ᪂つ㕲㗰〇㐀ࣉࣟࢭࢫࡢ㛤Ⓨ
ࡀᚲせ࡛ࠊ㏆ᖺࠕ≀㉁ࣜࢧ࢖ࢡࣝᆺࡢᣢ⥆ྍ⬟࡞〇㕲ࢩࢫࢸ࣒ࠖ (SMART) 1, 2)ࡀᥦ᱌ࡉࢀ
ࡓࠋࡑࡇ࡛ࡣࠊ㕲࠾ࡼࡧⅣ⣲ࡢᚠ⎔࡟╔┠ࡋ࡚࠾ࡾࠊ㕲※࡜ࡋ࡚㕲㖔▼ࡔࡅ࡛ࡣ࡞ࡃࢫࢡࣛࢵࣉࠊⅣ⣲※࡜ࡋ࡚ࢥ࣮ࢡࢫࡔࡅ࡛࡞ࡃࣉࣟࢭࢫ࠿ࡽ᤼ฟࡉࢀࡿ CO2 ࢆ㑏ඖ෌⏕ࡋ࡚ᚓࡓ CO ࡸ C ࢆ᝿ᐃࡋ࡚࠸ࡿࠋࣉࣟࢭࢫࡢ࢖࣓࣮ࢪᅗࡢ୍౛ࢆ Fig.1 ࡟♧ࡍࠋࢫࢡࣛࢵࣉࠊ㕲㖔▼ࠊࢥ࣮ࢡࢫࢆ✚ᒙࡋࠊ⅔ୗ㒊ࡸ⅔⭡࠿ࡽྛ✀࢞ࢫࢆ྿ࡁ㎸ࡴࡇ࡜࡛⁐㖧㸦ࡲࡓࡣ⁐㗰㸧ࢆᚓࡿࠕ඘ሸᒙᆺ㒊ศ⁐⼥㑏ඖࣉࣟࢭࢫ࡛ࠖ࠶ࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊ⅔ෆ཯ᛂᶵᵓࡣ඲ࡃ᫂ࡽ࠿࡟࡞ࡗ࡚࠸࡞࠸ࠋᮏ◊✲࡛ࡣࠊ㕲※࡜ࡋ࡚㕲㖔▼࠾ࡼࡧࢫࢡࣛࢵࣉࢆే⏝ࡍࡿ඘ሸᒙ‫‮‬䛰䜎䜚
Air/O2/N2/COG/PCI/H2/CO/CO2/CH4 etc.

㕲㖔▼䝇䜽䝷䝑䝥䝁䞊䜽䝇⁐㖧䜎䛯䛿⁐㗰

Fig.1 Packed bed type Partial Smelting Reduction process3)
PSR ⅔ (Packed bed type Partial Smelting Reduction process)3)࡬ࡢ SMART ࢩࢫࢸ࣒ࡢ㐺⏝ࢆ᝿ᐃࡋࠊ཯ᛂ㏿ᗘㄽⓗᩘᏛࣔࢹࣝࢆ㛤ⓎࡋࠊⅣ⣲ᚠ⎔᫬ࡢ⅔ෆ཯ᛂᣲືࢆゎᯒࡋࠊ㸫㸫ࡑࡢᐇ⌧ᛶࢆホ౯ࡋࡓࠋࣔࢹࣝ࡟ࡣ୍ᐃ㡿ᇦ࡟࠾ࡅࡿ≀㉁࣭⇕ࡢὶධ࣭ὶฟ࡜཯ᛂ࡞࡝࡟
ࡼࡿࢃࡁࡔࡋࢆ⪃៖ࡋ࡚㏣㊧ࡍࡿ Euler ἲࢆ᥇⏝ࡋࠊᅛ┦ࠊᾮ┦ࠊẼ┦ࠊᚤ⢊ࡢ 4 ┦ࢆ⪃៖ࡋࡓࠊ࠸ࢃࡺࡿ 4 ὶయࣔࢹࣝ 4, 5)ࢆ࣮࣋ࢫ࡜ࡋࡓࣔࢹࣝ㛤Ⓨ࠾ࡼࡧゎᯒࢆ⾜ࡗࡓࠋ2㸬཯ᛂ㏿ᗘㄽⓗᩘᏛࣔࢹࣝ࠾ࡼࡧゎᯒ᮲௳ PSR ⅔ࡣࠊヨ㦂㌿⅔ (10 t/heat) ࡢ⅔㡬࡟ࢩࣕࣇࢺ㒊ࢆ௜ຍࡋࡓ඘ሸᒙᆺ〇㕲⅔࡛ࠊ⅔㡬ࡼࡾཎᩱ࡜ࡋ࡚ࢫࢡࣛࢵࣉࠊ㕲㖔▼ࠊࢥ࣮ࢡࢫࠊ▼⅊▼ࠊ⌛▼ࢆ⿦ධࡋࠊ⅔ୗ㒊ࡢ 3 ẁ⩚ཱྀ (⅔ᗏ࠾ࡼࡧ⅔⭡㒊 2 ẁ) ࠿ࡽ㓟⣲ࠊLPGࠊ࠾ࡼࡧᚤ⢊Ⅳࢆ྿ࡁ㎸ࡴࡇ࡜࡛⣙ 5 t/hࡢ⏕⏘⬟ຊࢆ᭷ࡍࡿ 3)ࠋᮏ◊✲࡛ࡣࠊࡲࡎ PSR ⅔ࡢ⅔ෆゎᯒ⏝ࡢ཯ᛂ㏿ᗘㄽⓗᩘᏛࣔࢹࣝ
ࢆᵓ⠏ࡋࠊḟ࡟ CO ࢞ࢫᚠ⎔᫬ࡢ⅔ෆ཯ᛂᣲືࢆゎᯒࡋࡓࠋ ཯ᛂ㏿ᗘㄽⓗᩘᏛࣔࢹࣝࡣࠊP. R. Austin ࡽࡀ㛤Ⓨࡋࡓ㧗⅔ࣔࢹࣝ 5)ࢆඖ࡟㛤Ⓨࡋࡓࠋࡇࡢࣔࢹࣝࡣࠊ⅔㡬ࡼࡾᅛ┦ࠊ⅔ୗ㒊ࡢ⩚ཱྀ࠿ࡽẼ┦࠾ࡼࡧ⢊య┦ࡀ⿦ධࡉࢀࠊᅛ┦࠾ࡼࡧᾮ┦ࡀୗ᪉࡬ࠊẼ┦࠾ࡼࡧ⢊య┦ࡀୖ᪉࡬⛣ືࡍࡿ㝿ࡢࠊ⅔యෆࡢ≀㉁⛣ື࠾ࡼࡧ཯ᛂ
ᣲືࢆ㐃⥆ὶయࣔࢹ࡛ࣝゎᯒࡍࡿࡶࡢ࡛࠶ࡿࠋᮏ◊✲᳨࡛ウࡋࡓ PSR ⅔ࡣ㧗⅔ྠᵝ࡟ྥὶᆺࡢ཯ᛂჾ࡛ࠊẼయ࡜ᅛయࡣ஫࠸࡟␗࡞ࡿ᪉ྥ࡟ὶືࡍࡿࠋࡲࡓ≉࡟⅔ୗ㒊࡟࠾࠸࡚ࡣࠊ
ࡑࢀࡽࡢ㐠ືࡣୖୗ᪉ྥࡤ࠿ࡾ࡛࡞ࡃỈᖹ᪉ྥࡢ㐠ືࡶຍࢃࡿࠋࡇࡢࡓࡵࠊゎᯒࡣከḟඖ࡛⾜࠺ࡶࡢ࡜ࡍࡿࠋࡲࡓࠊẼయ࡜ᅛయࡣゝ࠺ࡲ࡛ࡶ࡞ࡃࠊ⅔ෆ࡟Ꮡᅾࡍࡿᾮయࡸ⢊యࡶ࠶ࢃࡏ࡚ࠊࡇࢀࡽࡢ≀㉁ࡣ஫࠸࡟␗࡞ࡿὶືᶵᵓ࡛ὶ㏻ࡋ࡚࠸ࡿࠋὶືᶵᵓࡀ␗࡞ࢀࡤࠊὶ
㏻⤒㊰ࡀ␗࡞ࡾࠊ཯ᛂࡸ⇕ⓗ⌧㇟ࡢᒚṔࡶ⊂⮬ࡢࡶࡢ࡜࡞ࡿࠋࡉࡽ࡟ࠊࡇࢀࡽࡢ≀㉁ࡢὶ
ືࡣࠊ≀㉁࣭㐠ື㔞࣭⇕࡞࡝ࡢ஺᥮࡟ࡼࡾ┦஫࡟ᙳ㡪ࢆཬࡰࡍࡓࡵࠊࡑࡢᙳ㡪ࢆ⪃៖ࡋࡓゎᯒᡭἲࡀᚲせ࡜࡞ࡿࠋ ୖ㏙ࡢ≧ἣࢆ⪃៖ࡋ࡚ࠊᮏ◊✲࡛㛤Ⓨࡋࡓ PSR ཯ᛂゎᯒࣔࢹࣝࡢᴫせࡣ௨ୗࡢࡼ࠺࡟ࡲ࡜ࡵࡿࡇ࡜ࡀ࡛ࡁࡿࠋ
1㸧 ⅔ෆ࡟Ꮡᅾࡍࡿ≀㉁ࡢኚ໬ࡣ Euler ἲ࡟ࡼࡾᐃᘧ໬ࡍࡿࠋ2㸧 ཯ᛂࠊఏ⇕ࠊ≀㉁⛣ື࡞࡝࡟ࡘ࠸࡚ࡣ㏿ᗘㄽⓗ࡟ᐃᘧ໬ࡍࡿࠋ3㸧 ⅔ෆࢆὶ㏻ࡍࡿᏑᅾ┦࡜ࡋ࡚ࠊᅛ┦ (⿦ධ≀)ࠊẼ┦ (㑏ඖ࢞ࢫ)ࠊᾮ┦ (⁐㖧࠾ࡼࡧ⁐⼥ࢫࣛࢢ)࠾ࡼࡧ⢊య┦ (ᮍ⇞ᚤ⢊Ⅳࢳ࣮ࣕ࠾ࡼࡧᚤ⢊ࢥ࣮ࢡࢫ) ࡢ 4 ┦ࢆ⪃៖ࡍࡿࠋ4㸧 ྛ┦ࡢ㐠ືࢆ㏣㊧ࡍࡿ㝿࡟ࡣ௚┦࡜ࡢ཮᪉ྥࡢ┦஫స⏝ࢆ⪃៖ࡍࡿΰ┦ὶࡢᡭἲࢆ⏝࠸ࡿࠋ PSR ࡣከᵝ࡞ᅛయཎᩱࡀ⿦ධࡉࢀࡿⅬࠊ࠾ࡼࡧ⣧㓟⣲྿ࡁ㎸ࡳ࡛࠶ࡿⅬࡀ㧗⅔࡜␗࡞ࡿࠋࡇࢀࡽ࡟ᑐᛂࡉࡏࡿࡓࡵࠊ᪤᭷ࣔࢹࣝ࡟ᑐࡋ௨ୗࡢ 2 Ⅼࡢ㛤Ⓨࢆ⾜ࡗࡓࠋ1) ከᵝ࡞⿦ධ≀࡬ࡢᑐᛂ ࢫࢡࣛࢵࣉࠊ㕲㖔▼ࠊࢥ࣮ࢡࢫࠊ▼⅊▼ࠊ࠾ࡼࡧ⌛▼ࡢ 5 ✀ࡢ⅔㡬࠿ࡽࡢ⿦ධ≀࡟ᑐᛂࡉࡏࡓࠋ࡞࠾ࠊ▼⅊▼ (CaCO3) ࡣ⏕▼⅊ (CaO) ࡜ࡋ࡚ィ⟬ࡋࡓࠋ㸫㸫2) ྛ✀≀ᛶ್ࡢ㧗 ᑐᛂ PSR ࡣ⣧㓟⣲྿ࡁ㎸ࡳࡢࡓࡵ⩚ཱྀ๓ ᗘࡀ᪤Ꮡᩘ್ィ⟬ࣔࢹࣝࡢ㐺⏝ ᗘ⠊ᅖࢆ኱ᖜ࡟㉸࠼ࡿࠋFig. 2 ࡟୍౛࡜ࡋ࡚ CO2 ࢞ࢫࡢẚ⇕ࡢẚ㍑ࢆ♧ࡍࠋ᪤Ꮡࣔࢹࣝ࡟౑⏝ࡉࢀ࡚࠸ࡓẚ⇕ࡢ ᗘ㛵ᩘࡣ⣙ 1600Υࡲ࡛ࡣ ᗘୖ᪼࡟ᚑ࠸ቑຍࡋࠊᩥ⊩್࡜Ⰻ࠸୍⮴ࢆ♧ࡍࡀࠊࡑࢀ௨ୖࡢ ᗘ࡛ࡣῶᑡ࡟㌿ࡌࠊᩥ⊩್࡜ࡢ஋㞳ࡀ኱ࡁࡃ࡞ࡿࡇ࡜ࡀศ࠿ࡿࠋࡘࡲࡾࠊᚑ᮶ࣔࢹ࡛ࣝࡣ ᗘୖ᪼࡟ᚑ࠸ẚ⇕ࡀᑠࡉࡃ࡞ࡿࡓࡵ ᗘࡀ㐣๫࡟㧗ࡃ࡞ࡿഴྥࢆ᭷ࡍࡿࠋᚑ᮶ࡢ㧗⅔ゎᯒ࡛ࡣ⅔ෆ᭱㧗 㒊࡛࠶ࡿ⩚ཱྀ๓ࡀ 2000Υ⛬ᗘࡢࡓࡵ኱ࡁ࡞ᙳ㡪ࢆཬࡰࡉ࡞࠸ࠋ୍᪉ࠊᮏ◊✲࡛ᑐ㇟࡜ࡍࡿ PSR ࣉࣟࢭࢫ࡛ࡣ⅔ෆ ᗘࡀ2000Υࢆ㉸࠼ࡿ࡜ሗ࿌ 3)ࡉࢀ࡚࠾ࡾࠊࡑࡢᙳ㡪ࡣ኱ࡁ࠸࡜⪃࠼ࡽࢀࡿࡓࡵࠊྠᅗ୰࡟
♧ࡍࡼ࠺࡞ ᗘ㛵ᩘ࡟ኚ᭦ࡋࡓࠋ≀ᛶ್ࡢ௚ࡢ࢞ࢫ✀࡛ࡶ㧗 ᇦ࡛஋㞳ࡀ⏕ࡌࡿࡓࡵྠᵝࡢኚ᭦ࢆ᪋ࡋࡓࠋ

Cp [J mol -1 K-1]

80

CO260

Previous model
Database (HSC Chemistry)
50-298.15 K
298.15-900 K
900-2700 K
2700-7600 K
This study

40
200010002000
3000
Temperature [K]4000

Fig.2 Comparison of CO2 specific heat between used inprevious model, present model, and database6) ィ⟬࡟౑⏝ࡋࡓ⅔యᙧ≧࠾ࡼࡧィ⟬᱁Ꮚࢆ Fig. 3 ࡟♧ࡍࠋ
㧗ࡉ 5.0 mࠊ
⅔ᗏ༙ᚄ 0.92 mࠊ
⅔㡬༙ᚄ 0.62 m ࡢ෇⟄ᙧ≧ࡢ⅔య࡛ࠊ෇⟄ᗙᶆ⣔ࢆ⏝࠸࡚㧗ࡉ࠾ࡼࡧ༙ᚄ᪉ྥ࡟ 60 ࠾ࡼࡧ 25 ศ๭ࡋࡓ BFC ᱁Ꮚࢆ౑⏝ࡋࡓࠋ⅔㡬࠿ࡽ 25Υࡢ㕲㖔▼ࠊࢫࢡࣛࢵࣉࠊ⌛▼ࠊ▼⅊ࠊࢥ࣮ࢡࢫࡢ 5 ✀ࡢᅛయཎᩱࢆ⿦ධࡍࡿࠋ㏦㢼⏝ࡢ⩚ཱྀࡣ 2 ẁ࠶ࡾࠊୗẁࡢ⩚ཱྀ࠿ࡽ 25Υࡢ㓟⣲ࠊᚤ⢊Ⅳ࠾ࡼࡧ LPG ࢆࠊୖẁࡢ⩚ཱྀ࠿ࡽ 25Υࡢ㓟⣲࠾ࡼࡧ LPG ࢆ྿ࡁ㎸ࡳࠊ⇞↝ࠊ⁐⼥ࠊ㑏ඖ➼ࡢྛ✀཯ᛂࢆ⤒࡚⅔ୗ㒊ࡼࡾ᤼ฟ⁐㖧࠾ࡼࡧ⁐⼥ࢫࣛࢢࡀ᤼ฟࡉࢀࡿࠋ㸫㸫

0.62

[m]
5.0

3.2
2.2
1.6

1.5

1.0

0.0

0.92

0.0

Fig. 3 Calculation mesh for analyzing PSR ࡲࡎࠊᇶ‽᮲௳࡜ࡋ࡚ᐇ᧯ᴗ್ (5 t/hࠊScrap ẚ 65%) ࡟ᇶ࡙ࡃ᮲௳࡛ィ⟬ࢆ⾜࠸ࠊ⅔ෆࡢ཯ᛂ࣭≀㉁⛣ື≧ἣࢆゎᯒࡋࡓࠋḟ࡟ࠊᇶ‽᮲௳ࡢ⥲㏦㢼 O2 ࠿ࡽⓎ⏕ࡍࡿ CO ࢞ࢫࡢ 10 ࠾ࡼࡧ 20%࡟┦ᙜࡍࡿ CO ࢞ࢫࢆ 1 ẁ┠ࡢ⩚ཱྀ࡟ 25Υ࡛ῧຍࡋࡓሙྜࡢ⅔ෆࡢ཯ᛂ࣭≀㉁⛣ື≧ἣࢆゎᯒࡋࠊࡑࡢ㑏ඖᮦẚ๐ῶ࡟ཬࡰࡍຠᯝࢆ᳨ウࡋࡓࠋ3㸬⤖ᯝ࠾ࡼࡧ⪃ᐹ 㛤Ⓨࡋࡓᩘ್ィ⟬ࣔࢹࣝ࡟ࡼࡿ⅔ෆ ᗘศᕸࡢゎᯒ⤖ᯝࢆ Fig. 4 a) ࡟♧ࡍࠋ⅔ୗ㒊ࡀ㧗 ࠊ⅔㡬㒊ࡀప ࡢ඾ᆺⓗ࡞ྥὶᆺ඘ሸᒙࡢ ᗘศᕸࢆ♧ࡋࡓࠋ1 ẁ┠⩚ཱྀࡢฟཱྀࡣ⅔
ቨ࠿ࡽ 0.2 m ࡢ఩⨨࡟タᐃࡋࡓࡓࡵࠊ⅔ቨࡼࡾⱝᖸෆഃ࡟㧗 㒊఩ࡀᏑᅾࡋࠊࡇࡢ఩⨨ࢆ㉳Ⅼ࡟ୗ㒊࡟Ώࡾ㧗 㡿ᇦࡀᏑᅾࡋࡓࠋ⩚ཱྀฟཱྀ㏆ഐ࠿ࡽ⅔୰ᚰ࡟ྥ࠿ࡗ࡚ 1200-1400Υ
ࡢ⼥╔ᖏ࡟┦ᙜࡍࡿ㡿ᇦࡀᏑᅾࡋ࡚࠸ࡿࠋ୍⯡ⓗ࡞඘ሸᒙᆺ཯ᛂჾࡢሙྜࡣࠊ୰ᚰ࡟࢞ࢫ
ὶࢀࡀ೫ὶࡍࡿࡓࡵࠊ⅔୰ᚰࡢ ᗘࡀ㧗ࡃ࡞ࡿࡀࠊᮏ◊✲࡛ゎᯒࡋࡓ⅔యࡣ 2 ẁ┠ࡢ⩚ཱྀ࠿ࡽࡶ㓟⣲ࢆ྿ࡁ㎸ࢇ࡛࠸ࡿࡓࡵࠊ⅔୰⭡ࡢቨഃࡢ ᗘࡀୖ᪼ࡋࠊ800Υࡢ㡿ᇦࡀ⅔୰ᚰ
ࡼࡾࡶ⅔ቨഃ࡬ᗈࡀࡿᵝᏊࡀほᐹࡉࢀࡓࠋࡇࡢ⅔య࡟ᇶ‽᮲௳࡛౪⤥ࡋࡓ㓟⣲࠿ࡽ໬Ꮫ㔞ㄽⓗ࡟ᚓࡽࢀࡿ CO ࢞ࢫࡢ 10%࠾ࡼࡧ 20㸣ࢆ 1 ẁ┠⩚ཱྀ࠿ࡽ྿ࡁ㎸ࢇࡔ᫬ࡢ⅔ෆ ᗘศᕸゎᯒ⤖ᯝࢆྠᅗ b) ࠾ࡼࡧ c) ࡟♧ࡍࠋ྿ࡁ㎸ࡳ࡟ࡼࡾ⅔୰⭡㹼ୖ㒊ࡢ ᗘࡀపୗࡋ࡚
࠸ࡿ஦ࡀศ࠿ࡿ ( ᅗ୰Ⅼ⥺㒊 㸧ࠋゎᯒᑐ㇟ࡢ⅔యෆࡢẼ┦ࡣᚋ㏙ࡢ Fig. 5 ࡟♧ࡍ࡜࠾ࡾ㸫㸫

CO ࢞ࢫࡀᨭ㓄ⓗ࡛࠶ࡿࠋࡇࡢࡼ࠺࡞⎔ቃୗ࡛ࡣ CO + O2 Æ CO2 ࡢⓎ⇕཯ᛂࡀ㉳ࡇࡽ࡞࠸ࡓࡵࠊ20Υࡢ CO ࢞ࢫ྿ࡁ㎸ࡳࡣ⅔ࡢప ୗࢆᘬࡁ㉳ࡇࡍࡇ࡜ࡀศ࠿ࡿࠋ࡞࠾ࠊCO ࢞
ࢫ 30%௨ୖࡢ྿ࡁ㎸ࡳ᮲௳࡛ࡣィ⟬ࡀ཰᮰ࡋ࡞࠿ࡗࡓࡇ࡜࠿ࡽࠊ ᗘపୗ࡟ࡼࡿ᧯ᴗ୙඲ࡀᘬࡁ㉳ࡇࡉࢀࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋ

Temp. [0C]

    a) Base conditionb) 㸩10%-CO    c) 㸩20%-COFig.4 Effect of CO recirculation on the gas temperature distribution in furnace ḟ࡟ࠊCO ⃰ᗘศᕸࢆ Fig. 5 ࡟ࠊCO2 ⃰ᗘศᕸࢆ Fig. 6 ࡟ࠊH2 ⃰ᗘศᕸࢆ Fig. 7 ࡟♧ࡍࠋᇶ‽≧ែ࡛ࡣ 1 ẁ┠࠾ࡼࡧ 2 ẁ┠ࡢ⩚ཱྀ㏆ഐࡣ H2 ⃰ᗘࡀ㧗ࡃࠊCO ࠾ࡼࡧ CO2 ⃰ᗘࡣప࠸ࠋᮏࣔࢹࣝ࡟࠾ࡅࡿ⩚ཱྀ๓཯ᛂࡣࠊḟࡢ㡰࡟⏕ࡌࡿࡶࡢ࡜ࡋࡓࠋࡲࡎࠊ⾪㢼୰ࡢ㓟⣲࡜࣓ࢱࣥࡀ཯ᛂࡍࡿࠋ
CH4 + 0.5 O2 → CO + 2 H2(1)ᘬࡁ⥆ࡁࠊ⾪㢼୰ࡢ㓟⣲ࡣᚤ⢊Ⅳࡢ⇞↝ࢆ⏕ࡌࡿࠋ
CaHbNdOe + 0.5 (a - e) O2 → a CO + 0.5b H2 + 0.5d N2(2)⾪㢼୰࡟ṧᏑࡍࡿ㓟⣲࠾ࡼࡧ㏦㢼‵ศࡣࡍ࡭࡚ࢥ࣮ࢡࢫ୰ࡢⅣ⣲࡜཯ᛂࡍࡿ
C + 0.5 O2 → CO(3)C + H2O → CO + H2(4)ࡇࡢ㡰࡟཯ᛂࡀ㐍⾜ࡍࡿࡓࡵࠊ࣓ࢱࣥ྿ࡁ㎸ࡳ᮲௳ୗ࡛ࡣࠊ⩚ཱྀ๓ࡢ H2 ⃰ᗘࡀቑຍࡍࡿࠋ
CO ྿ࡁ㎸ࡳ࡟ࡼࡾࠊ⩚ཱྀ๓ࡢ CO ⃰ᗘࡀቑຍࡋࠊ┦ᑐⓗ࡟ H2 ⃰ᗘࡀῶᑡࡍࡿഴྥࡀᚓࡽ
ࢀࡓࠋ⩚ཱྀ㏆ഐ௨እࡢ㡿ᇦࡣࠊ⼥╔ᖏࡼࡾୗࡢ㡿ᇦࡣ⣙ 90㸣ࠊୖࡢ㡿ᇦࡣ⣙ 80%ࢆ CO࢞ࢫࡀ༨ࡵ࡚࠾ࡾࠊ๓㏙ࡢ㏻ࡾࡇࡢ⎔ቃୗ࡛ࡣ྿ࡁ㎸ࢇࡔ CO ࢞ࢫࡣ୙άᛶ࢞ࢫ࡜ྠ➼ࡢ㸫㸫ᣲືࢆ♧ࡋࠊ㑏ඖ㏿ᗘࡸ⁐ゎ㏿ᗘ࡬ࡢᙳ㡪ࡣ࡯࡜ࢇ࡝࡞࠸ࡇ࡜ࡀ♧၀ࡉࢀࡿࠋ࡞࠾ࠊ⌧⾜㧗⅔ࡢࡼ࠺࡞ࠊ✵Ẽࠊࡘࡲࡾ❅⣲ࢆ 80%ྵ᭷ࡍࡿ㓟⣲ࢆ྿ࡁ㎸ࢇ࡛㕲㖔▼ࢆ㑏ඖࡍࡿ᮲௳ୗ࡛ࡣࠊCO ྿ࡁ㎸ࡳ࡟ࡼࡾ⅔ෆࡢ CO ⃰ᗘࡀቑຍࡍࡿࡓࡵࠊ㑏ඖ㏿ᗘࡢྥୖࡀᮇᚅ࡛ࡁ
ࡿࠋVol. frac. [-]    a) Base conditionb) 㸩10%-CO    c) 㸩20%-CO

Fig. 5 Effect of CO recirculation on the CO gas distribution in furnace㸫㸫

Vol. frac. [-]    a) Base conditionb) 㸩10%-CO    c) 㸩20%-CO

Fig. 6 Effect of CO recirculation on the CO2 gas distribution in furnace

Vol. frac. [-]    a) Base conditionb) 㸩10%-CO    c) 㸩20%-CO

Fig. 7 Effect of CO recirculation on the H2 gas distribution in furnace㸫㸫 ḟ࡟㑏ඖᮦẚ࡟ཬࡰࡍ CO ࢞ࢫ෌ᚠ⎔ࡢᙳ㡪ࢆ Fig.8 ࡟♧ࡍࠋᮏ᳨ウ࡛ࡣ㑏ඖᮦ࡜ࡋ࡚
ࢥ࣮ࢡࢫࠊᚤ⢊Ⅳࠊ࣓ࢱࣥࢆ౑⏝ࡋ࡚࠾ࡾࠊ⁐㖧 1 t ࠶ࡓࡾࡢ౑⏝㔞ࢆ CRࠊPCRࠊLPG࡜⾲グࡋࠊࡇࢀࡽࡢྜィࢆ㑏ඖᮦẚ RAR ࡜ࡋࡓࠋRAR ࡣ୍⯡ⓗ࡞㧗⅔࡛ 500~520 kg/thmࡔࡀࠊᮏࣉࣟࢭࢫ࡛ࡣ⣙ 300 kg/thm ࡜⣙ 60%ࡢ್ࢆ♧ࡋࡓࠋࡇࢀࡣࠊ㕲※࡟㕲㖔▼ࡔࡅ࡛࡞ࡃࢫࢡࣛࢵࣉࢆ⣙ 65%౑⏝ࡋ࡚࠸ࡿࡓࡵ࡛ࠊࢫࢡࣛࢵࣉ฼⏝ࡢ RAR పῶࠊCO2 ᤼ฟ๐ῶຠᯝࡢ኱ࡁࡉࢆ♧ࡋ࡚࠸ࡿࠋPCR ࠾ࡼࡧ LPG ࡣ㏦㢼᮲௳࡛Ỵࡲࡿ୚᮲௳ࡢࡓࡵࠊCO࢞ࢫ෌ᚠ⎔ࡢᙳ㡪ࡣཷࡅࡎࠊ୍ᐃ್ࢆ♧ࡋࡓࠋ୍᪉ࠊRAR ࠾ࡼࡧ CR ࡣ CO ࢞ࢫ෌ᚠ⎔㔞ࡢቑຍ࡟࡜ࡶ࡞࠸ῶᑡࡋࡓࠋࡇࢀࡣࢥ࣮ࢡࢫ⇞↝࡛⏕ᡂࡋ㕲㖔▼ࡢ㑏ඖ࡟฼⏝ࡉࢀ࡚࠸ࡓCO ࢞ࢫࡀ෌ᚠ⎔ CO ࡟⨨ࡁ᥮ࢃࡗࡓࡓࡵ࡜᥎ᐹ࡛ࡁࡿࠋᚑࡗ࡚ࠊCO ࡢ෌ᚠ⎔ࡣ㑏ඖᮦẚࡢపῶ࡟᭷ຠ࡛࠶ࡿࠋࡓࡔࡋࠊCO ࢞ࢫࡣ⅔ෆ࡛ぢ࠿ࡅୖ୙άᛶ࡞࢞ࢫ࡜ࡋ࡚᣺ࡿ⯙࠺ࡓࡵࠊண⇕ࡋ࡚࠸࡞࠸ CO ࢞ࢫ྿ࡁ㎸ࡳࡣ⅔ෆ ᗘపୗࢆᘬࡁ㉳ࡇࡍせᅉ࡟࡞ࡿࡇ࡜࠿ࡽࠊCR, PCR, LNG, RAR[ kg/thm ]྿ࡁ㎸ࡳ㔞࡜⅔ෆ཯ᛂ≧ἣࡢᢕᥱࡣ㔜せ࡛࠶ࡿࠋ300

RAR
CR

200
1000PCR
LPG
Basecondition

㸩10%-CO

㸩20%-COFig. 8 Effect of CO recirculation on the CR, PCR, LNG and RAR
4㸬ࡲ࡜ࡵ 㕲※࡜ࡋ࡚㕲㖔▼࠾ࡼࡧࢫࢡࣛࢵࣉࢆ౑⏝ࡍࡿࠕ඘ሸᒙᆺ㒊ศ⁐⼥㑏ඖࣉࣟࢭࢫࠖࡢᩘ್ゎᯒࣔࢹࣝࢆ㛤ⓎࡋࠊCO ࢞ࢫ෌ᚠ⎔ࡢྍ⬟ᛶࢆヨ⟬ࡋࠊ௨ୗࡢ▱ぢࢆᚓࡓࠋ࣭ CO ෌ᚠ⎔࡟ࡼࡾ㑏ඖᮦẚࡣపῶࡍࡿࠋ࣭ ண⇕ࡋ࡞࠸ CO ࢞ࢫ෌ᚠ⎔ࡣ⅔ෆ ᗘపୗࢆᘬࡁ㉳ࡇࡍࡓࡵࠊᚠ⎔ྍ⬟㔞࡟ࡣୖ㝈ࡀᏑᅾࡍࡿࠋㅰ㎡ ᮏ◊✲ࡣࠊබ┈㈈ᅋἲே JFE21 ୡ⣖㈈ᅋࡼࡾᢏ⾡◊✲ຓᡂ (2015 ᖺᗘ) ࡢᨭ᥼ࢆཷࡅ࡚㐙⾜ࡉࢀࡲࡋࡓࠋグࡋ࡚῝⏒࡞ࡿㅰពࢆ⾲ࡋࡲࡍࠋ㸫㸫ཧ⪃ᩥ⊩
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