Operation and improvement of electrostatic precipitator in a sulphuric acid plant

Structure, operation and improvement of S4L40 electrostatic precipitator designed for a 160 kt/a sulphuric acid plant are described. The electrostatic precipitator had run for 15 years without major overhaul, owing to strictly controlling dust content of inlet gas, preventing overheating and strengthening routine maintenance. When the plant operated with a capacity of 200 kt/a, the dust content at the outlet of electrostatic precipitator was still less than 0. 3 g/m3, satisfying the need for cleaning section with dilute acid scrubbing process.