Flue gas desulfurization process suitable for sintering machine of steel mill

• Main Authors: SUN JIANZHONG, GAO CHONG, XIONG WU, GAO ZHU, SHI DONGHUI, LI ZHICHUN
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2012
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses process technology suitable for removing a sulfur dioxide byproduct, namely, ammonium sulfate chemical fertilizer in flue gas produced by a sintering machine of a steel mill and suitable for the characteristics of large sintering flue gas amount, large flue temperature fluctuation, high moisture content, high dust content and the like. The process comprises the following steps of: allowing sintering flue gas to enter from the middle of an absorption tower, wherein the flue gas is reversely contacted with absorption liquid; removing sulfur dioxide from the flue gas in acontacting process; exhausting the flue gas through a chimney on the top of the tower after the flue gas flows through a demister on the top of the tower; introducing compressed air and ammonia waterinto the absorption liquid, wherein ammonium sulfate in solution is saturated and 5 percent of crystal is separated out along with continuous absorbing and oxidizing processes; and rotating, filtering and drying ammonium sulfa