Module 3 : Pollution control techniques

Lecture 3 : Sulfur Dioxide

Lime – Spray Drying

–Lime Slurry is sprayed into the chamber

–The sulfur dioxide is absorbed by the slurry

–The liquid-to-gas ratio is maintained such that the spray dries before it reaches the bottom of the chamber

– The dry solids are carried out with the gas, and are collected in fabric filtration unit

– This system needs lower maintenance, lower capital costs, and lower energy usage

Wellman – Lord Process

Schematic process flow diagram – SO2 scrubbing and recovery system