| 摘要 |
<p>PURPOSE:To simultaneously remove both sulfur oxide and carbon dioxide by adding an amine based carbon dioxide absorbent as an accelerator to a liquid absorbent contg. potassium carbonate. CONSTITUTION:Waste gas from an inlet duct 1 is brought into contact with potassium carbonate-contg. liquid 3 in an absorber 2. When an amine-based carbon dioxide absorbent, such as diethanolamine is added to the liquid absorbent, diethanolamine forms carbon dioxide and amine carbamate intermediates and further conversion reaction to bicarbonate takes place to regenerate amine. Then, the liquid absorbent which has absorbed carbon dioxide and sulfur oxide is sent to a shipper 5, where it is heated by a heating medium 6, such as steam. Then, carbon dioxide is stripped and discharged from a stripping duct 7 but potassium sulfate is kept at a concentration beyond solubility and separated by a solid-liquid separator 8. Further, after water 11 is added to the potassium sulfate separated in a potassium regeneration process, it is electrolyzed in an elctrolyzer 12 and potassium hydroxide 13 is returned to the absorber 2.</p> |
