华兴公司三期200kt/a硫酸装置工艺简介及运行情况

Process introduction and operation of Huaxing Co.Phase Ⅲ 200 kt/a sulphuric acid plant

介绍了华兴公司三期200 kt/a硫铁矿制酸装置工艺和运行情况,该装置采用动力波洗涤器—填料洗涤塔—两级电除雾器酸洗净化、ⅢⅠ-ⅣⅡ"3+1"二转二吸工艺流程。经过技术改造,解决了净化工序升华硫堵塞、增湿滚筒故障、干燥塔进气管腐蚀、电除尘器一电场送电不正常等影响生产的问题,改造后装置运行稳定,各项工艺指标达到设计值,总转化率99.5%、吸收率99.99%,尾气ρ(SO_2)345 mg/m^3。

The process and operation of Huaxing Co.PhaseⅢ200 kt/a sulphuric acid plant are described.The plant adopted a cleaning section consisting of one-stage DynaWave scrubber,packed cooling tower and two-stage wet electrostatic precipitators andⅢⅠ-ⅣⅡ＂3 ＋1＂double absorption process.Some problems affecting production, such as sublimed sulphur plugging in cleaning section,humidifying drum failure,drying tower inlet pipe corrosion and abnormal power supply of ESP No.1 field were solved by technical improvements.Now the plant operates stably and every operation index reaches design value with conversion efficiency of 99.5%,absorption efficiency of 99.99%,tail gas SO_2 concertration of 345 mg/m^3.