Sulfur dioxide tail gas circulating absorption system

• Main Authors: LI YOUMIN, LI YANPING, LIAN BAOXIANG, GUO YANZHAO
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2013
• Subjects: CHEMISTRY; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The utility model discloses a sulfur dioxide tail gas circulating absorption system and belongs to the field of sulfonation reaction equipment. The sulfur dioxide tail gas circulating absorption system comprises an absorption tower, an open liquid caustic soda groove and a solid-liquid separator, wherein a liquid caustic soda absorption tail gas circulating device is arranged between the liquid caustic soda groove and the absorption tower, and the liquid caustic soda groove and the solid-liquid separator are provided with liquid caustic soda solid-liquid separation circulating devices. The sulfur dioxide tail gas circulating absorption system with the structure has the advantages that sodium sulfite generated through reaction in the absorption tower reversely flows into the liquid caustic soda groove through the liquid caustic soda absorption tail gas circulating device, then the sodium sulfite separated out in the caustic soda groove is separated from absorption liquid through the liquid caustic soda solid-l