Abrégé

A method and a facility for wet-scrubbing sulfur dioxide to produce, for example, potassium thiosulfate or ammonium thiosulfate. The facility includes a multi- section vessel having multiple horizontally disposed stages where a preceding stage passes partially-scrubbed waste gas to a succeeding stage. Each stage has a scrubber mechanism to scrub waste gas with circulating fluid that successively reduces waste gas concentration before atmospheric discharge. The scrubber mechanism may include a packing to facilitate absorption of waste gas by the fluid, a sump disposed at the output of the stage to receive fluid as it drains from the packing, and a circulation pump to circulate fluid from the sump to its packing and to cascade at least a portion of the fluid back to a preceding stage. A portion of the fluid is extracted from the facility and reacted in a reaction vessel with a cation to produce ammonium thiosulfate or potassium thiosulfate.

Classes IPC  ?

• B01D 53/18 - Unités d'absorptionDistributeurs de liquides
• B01D 53/50 - Oxydes de soufre
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs

Abrégé

2 by the fluid, a sump disposed at the output of the stage to receive fluid as it drains from the packing, and a circulation pump to circulate fluid from the sump to its packing and to cascade at least a portion of the fluid back to a preceding stage. A portion of the fluid is extracted and reacted in a reaction vessel with a cation to produce potassium thiosulfate.

Classes IPC  ?

• C01B 17/64 - ThiosulfatesDithionitesPolythionates
• B01D 53/18 - Unités d'absorptionDistributeurs de liquides
• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/34 - Épuration chimique ou biologique des gaz résiduaires
• B01D 53/50 - Oxydes de soufre
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs

Abrégé

A method and a facility for wet-scrubbing sulfur dioxide to produce, for example, potassium thiosulfate or ammonium thiosulfate. The facility includes a multi-section vessel having multiple horizontally disposed stages where a preceding stage passes partially-scrubbed waste gas to a succeeding stage. Each stage has a scrubber mechanism to scrub waste gas with circulating fluid that successively reduces waste gas concentration before atmospheric discharge. The scrubber mechanism may include a packing to facilitate absorption of waste gas by the fluid, a sump disposed at the output of the stage to receive fluid as it drains from the packing, and a circulation pump to circulate fluid from the sump to its packing and to cascade at least a portion of the fluid back to a preceding stage. A portion of the fluid is extracted from the facility and reacted in a reaction vessel with a cation to produce ammonium thiosulfate or potassium thiosulfate.

Classes IPC  ?

• C01B 17/64 - ThiosulfatesDithionitesPolythionates
• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/18 - Unités d'absorptionDistributeurs de liquides
• B01D 53/34 - Épuration chimique ou biologique des gaz résiduaires
• B01D 53/50 - Oxydes de soufre
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs