5kt/a液体二氧化硫装置的工艺设计与设备选型

Process design and equipment selection of 5 kt/a liquid sulphur dioxide plant

介绍了5 kt/a液体二氧化硫装置工艺设计和设备选型情况。该装置采用柠檬酸钠法工艺,工艺参数选择合理、设备选型得当,目前已稳定运行1年多时间,各项工艺指标均达到或超过设计值。实际消耗硫磺0.45 t/t、电110kWh/t、柠檬酸10kg/t、纯碱18kg/t、0.3～0.4 MPa蒸汽0.4 t/t。探讨了设计生产中几个需要注意的问题,如输送管道材质选择、SO_3吸收塔进口气温控制、柠檬酸钠溶液浓度控制、吸收尾气处理等。

Process design and equipment selection of a 5 kt/a liquid sulphur dioxide plant are described,which uses sodium citrate process with reasonable process parameters and equipment and materials.The plant has operated for more than one year and every operation index reached or was superior to design value.Actual operation showed that the consumption of sulphur was 0.45 t/t,power 110 kWh/t,citric acid 10 kg/t,soda ash 18 kg/t and 0.3-0.4 MPa steam 0.4 t/t.Several issues that need attention in design and production are discussed,such as selection of pipeline material,control of inlet gas temperature of SO,absorption tower and sodium citrate concentration, and tail gas treatment.