The thermal oxidizing unit receives feed from the tail gas treating unit and the sulfur recovery unit. These feeds are heated and combusted, with fuel gas, to convert all of the remaining compounds into sulfur dioxide, water vapor, carbon dioxide and nitrogen. The hot process gas is then discharged safely to the atmosphere through a tall refractory lined stack. Some units have separate thermal oxidizers and stacks and some include waste heat recovery.
Thermal Oxidizer With Integrated Thermal Oxidizer and Stack: