Removal of sulfur dioxide from gas streams
Abstract
Abstract SULFUR DIOXIDE IS REMOVED FROM A GAS STREAM WHICH INITIALLY CONTAINS SULFUR DIOXIDE AND SULFUR TRIOXIDE, BY INTIALLY CONTACTING THE GAS SREAM WITH DESCRETE POROUS SLID PARICLES OF AN INORGANIC ALKALI WHICH MAY BE IN EQUILIBRIUM WITH RESPECT TO SULFUR DIOXIDE ABSORPTION AND WHICH COULD BE PRIMARILY ALKALI SULFITE DURING MUCH OF ITS EFFECTIVE LIFE. THE SULFUR TRIOXIDE COMPONENT OF THE GAS STREAM REACTS WITH THE INORGANIC ALKALI SOLID GENERALLY, DESPLACING ANY PREVIOUSLY ABSORBED, SULFUR DIOXIDE, AND A SECOND GAS STREAM IS PRODUCED WIHI IS SUBSTANTIALLY DEVOID OF SULFUR TRIXOIDE. THE SECOND GAS STREAM IS SCRUBBED WITH A LIQUDIC ONTAINING AN ACTIVE ALKALINE COMPONENT FOR THE ABSORPTION OF SULFUR DIOXIDE, AND A FINAL GAS STREAM FREE OF SULFUR OXIDES IS PRODUCED. THE INVENTION PREVENTS THE ABSORPTION OF SULFUR TRIOXIDE BY THE SCRUBBING LIQUID, AND THUS GREATLY REDUCES THE BUILD UP OF SULFATES IN THE SCRUBBING LIQUID WHICH ARE DIFFICULT TO REGENERATE. THUS, A NET LOSS OF ACTIVE ALKALINE COMPONENT DUE TO SULFATE FORMATION IS PREVENTED.
Inventors
- 👤 Fisher J Villiers
Bibliographic Details
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