序的气体依次经w(H2 SO4 ) 6 5 %、w (H2 SO4 ) 96 %硫酸干燥
,70 %的SO2 转化成SO3 并制成w(H2 SO4 ) 98%硫酸 ,剩余的SO2 再经NOX 催化氧化
成SO3 制成w(H2 SO4 ) 76 %硫酸 ,SO2的总转化率
达 99.997%。SAPNE工艺的投资费用是两转两吸工艺的近 95 % ,操作费用近 90 %
SAPNE technology is introduced which consists of a contact plant and a tower plant. The gas from cleaning section successively is dried by 65% sulphuric acid in a pre drying tower and 98% sulphuric acid in a post drying tower. 70% SO 2 of gas is converted to SO 3 to produce 98% sulphuric acid in the simplified contact section and remaining SO 2 is oxidized by NO X to SO 3 to produce 76% sulphuric acid in the tower section. The total SO 2 conversion is more than 99.997%. The investment and operationa...