JP2009504391A - 燃焼ガス流から二酸化硫黄を除去する方法 - Google Patents
燃焼ガス流から二酸化硫黄を除去する方法 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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Abstract
Description
2[Na2CO3・NaHCO3・2H2O]→3Na2CO3+5H2O+CO2
Na2CO3+SO2→Na2SO3+CO2
Na2SO3+1/2O2→Na2SO4
2[Na2CO3・NaHCO3・2H2O]→3Na2CO3+5H2O+CO2
Na2CO3+SO3→Na2SO4+CO2
CA、Veronaの商業的ガラスプラントにおいて、高温電気集塵器(ESP)を用いて、バッグハウスなしで検討が行なわれた。天然ガスが燃料源として使用され、硫黄源はガラス原材料に由来するものであった。燃焼ガス内のSO2濃度は800ppmであった。使用されたトロナはSolvay ChemicalsのT−200(登録商標)であった。トロナは圧縮空気送風器およびエアロック供給器を用いてダクト内に注入された。トロナの流速は、エアロックのrpmをトロナ貯蔵におけるトロナの重量損失で校正することによって測定された。トロナの供給速度は50ポンド/時から211ポンド/時まで変化した。
トロナは、NSR値1.0、1.2および1.4で、750°Fの温度で燃焼ガス内部に注入された。図2はトロナに関する規格化化学量論比(NSR)の関数としてのSO2除去%を示す。これらの試験から、NSRが1.2のとき、トロナは約80%のSO2除去速度を示すことがわかった。図4は、トロナを用いて5ヶ月間SO2除去システムを作動させた後の、ガラスプラント中のESPの多孔板を示す。板には比較的固体が蓄積していない。
比較例として、重炭酸ナトリウムが、NSR1.2において、例1と同じ条件の下で注入された。結果は図2に示される。SO2除去%は72%であり、温度およびNSRが同じときのトロナと比較してかなり低い。図5には、重炭酸ナトリウムを用いてSO2除去システムを作動させた後の、ガラスプラント中のESPの多孔板を示す。板にはかなりの固体が蓄積していることがわかる。
トロナは750°Fから805°Fの範囲の温度で、NSR1.5で燃焼ガス内部に注入された。図3は燃焼ガス温度の関数としてのSO2除去%を示す。これらの試験から、トロナで得られるSO2除去速度が最高91%であり、高い温度の幅広い範囲にわたって有効であったことがわかる。
12 燃料源
14 空気
40 熱交換器または空気ヒータ
50 集塵装置
60 ガススタック
Claims (21)
- トロナ源を提供する段階と、
トロナを燃焼ガス流内部に注入し、前記燃焼ガスの温度が約600°Fから約900°Fの間である段階と、
トロナの一部がSO2の一部と反応するのに十分な時間、トロナと燃焼ガスとの接触を保持し、燃焼ガス流内のSO2の濃度を下げる段階と、を含む、
SO2を含む燃焼ガス流からSO2を除去する方法。 - トロナの平均粒子サイズが約40ミクロン未満である、請求項1に記載の方法。
- トロナの平均粒子サイズが約10ミクロンから約40ミクロンの間である、請求項1に記載の方法。
- トロナの平均粒子サイズが約24ミクロンから約28ミクロンの間である、請求項1に記載の方法。
- 前記燃焼ガスの温度が約630°Fより高い、請求項1に記載の方法。
- 前記燃焼ガスの温度が約700°Fより高い、請求項1に記載の方法。
- 前記燃焼ガスの温度が約800°Fより低い、請求項1に記載の方法。
- 前記燃焼ガスの温度が約750°Fより低い、請求項1に記載の方法。
- 前記燃焼ガスの温度が約700°Fから約750°Fの間である、請求項1に記載の方法。
- トロナがSO2の流速に関連して硫黄に対するナトリウムの規格化された化学量論比が約1.0から1.5の間である速度で注入される、請求項1に記載の方法。
- トロナが乾燥材料として注入される、請求項1に記載の方法。
- 前記燃料ガス流に最も近い位置において所望される平均粒子サイズにトロナを粉砕する段階をさらに含む、請求項1に記載の方法。
- 前記トロナおよびSO2の反応生成物を電気集塵器で収集する段階をさらに含む、請求項1に記載の方法。
- 前記燃焼ガス流がSO3をさらに含み、トロナの一部がSO3の一部と反応するのに十分な時間、トロナと燃焼ガスとの接触を保持し、燃焼ガス流内のSO3の濃度を下げる段階をさらに含む、請求項1に記載の方法。
- 平均粒子サイズが約10ミクロンから約40ミクロンの間であるトロナ源を提供する段階と、
燃焼ガス流内部に乾燥粒状材料としてトロナを注入し、前記燃焼ガスの温度が約600°Fから約900°Fの間である段階と、
トロナの一部がSO2の一部と反応するのに十分な時間、トロナと燃焼ガスとの接触を保持し、燃焼ガス流内のSO2の濃度を下げる段階と、を含む、
SO2を含む燃焼ガス流からSO2を除去する方法。 - トロナの平均粒子サイズが約24ミクロンから約28ミクロンの間である、請求項15に記載の方法。
- 前記燃焼ガスの温度が約700°Fから約750°Fの間である、請求項15に記載の方法。
- トロナがSO2の流速に関連して硫黄に対するナトリウムの規格化された化学量論比が約1.0から1.5の間である速度で注入される、請求項15に記載の方法。
- トロナが注入される場所で所望の燃焼ガス温度を得るためにトロナ上流の燃焼ガス温度を調整する段階をさらに含む、請求項15に記載の方法。
- 前記調整する段階が、周囲空気を燃焼ガス流内部に導入すること、およびトロナが注入される場所で燃焼ガス温度を監視することをさらに含む、請求項19に記載の方法。
- 前記調整する段階が、燃焼ガスと通じる熱交換器を通じた材料の流れを制御する段階をさらに含む、請求項19に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/208,432 US7531154B2 (en) | 2005-08-18 | 2005-08-18 | Method of removing sulfur dioxide from a flue gas stream |
PCT/EP2006/065097 WO2007020205A1 (en) | 2005-08-18 | 2006-08-07 | Method of removing sulfur dioxide from a flue gas stream |
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JP2009504391A true JP2009504391A (ja) | 2009-02-05 |
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US (2) | US7531154B2 (ja) |
EP (1) | EP1919596B1 (ja) |
JP (1) | JP2009504391A (ja) |
CN (2) | CN101242886A (ja) |
BR (1) | BRPI0614344A2 (ja) |
CA (1) | CA2618202C (ja) |
CY (1) | CY1116061T1 (ja) |
DK (1) | DK1919596T3 (ja) |
EA (1) | EA014304B1 (ja) |
ES (1) | ES2527423T3 (ja) |
HK (1) | HK1201226A1 (ja) |
WO (1) | WO2007020205A1 (ja) |
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- 2006-08-07 BR BRPI0614344-0A patent/BRPI0614344A2/pt not_active IP Right Cessation
- 2006-08-07 CN CN201410126211.XA patent/CN103990376A/zh active Pending
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EP1919596B1 (en) | 2014-10-08 |
WO2007020205A1 (en) | 2007-02-22 |
EP1919596A1 (en) | 2008-05-14 |
CN101242886A (zh) | 2008-08-13 |
DK1919596T3 (en) | 2015-01-12 |
CN103990376A (zh) | 2014-08-20 |
US20070041885A1 (en) | 2007-02-22 |
EA014304B1 (ru) | 2010-10-29 |
US7531154B2 (en) | 2009-05-12 |
CA2618202C (en) | 2013-01-22 |
ES2527423T3 (es) | 2015-01-23 |
EA200800616A1 (ru) | 2008-08-29 |
CY1116061T1 (el) | 2017-02-08 |
US20090241774A1 (en) | 2009-10-01 |
US7854911B2 (en) | 2010-12-21 |
HK1201226A1 (en) | 2015-08-28 |
BRPI0614344A2 (pt) | 2012-11-27 |
CA2618202A1 (en) | 2007-02-22 |
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