Sulfur burning temperature control

The composition and temperature of sulfur burning s product gas are controlled by adjusting the sulfur burning furnace s ... 

Sulfur burning s product gas composition and temperature are readily controlled by adjusting the sulfur furnace s input air/input sulfur ratio. Replacement of some of the input air with oxygen gives the process independent 02/S02, temperature and volume control. 

Sulfur burning s product gas composition and temperature are readily controlled by adjusting the sulfur furnace s input air/input sulfur ratio. 

Steady operation and control of catalyst bed temperatures result in lower acid plant SO2 emissions. This is relatively easy for sulfur burning acid plants, but much more challenging for metallurgical acid plants, especially those treating Peirce-Smith converter gases that are intermittent and highly variable in terms of flow and composition. 

The authors have shown that by careful temperature control it is possible to retain a very high proportion of the sulfur originally contained in the pellet without having to use burned lime in excess of the stoichiometric requirement. This is illustrated in Fig. 5.6. 

In SOs-sulfation, the gas may be delivered by an outside manufacturer in tank cars, is produced in-house by stripping from oleum, or is generated close to the sulfation unit by burning sulfur and oxidizing of the SO2 to SO3 by air with vanadium oxide as catalyst. The latter is the preferred method in modem plants. The SO3 is diluted with dry air to reduce reactivity. Falling film and cascade reactors are used to carry out s. Temperature control and adequate feed transport that respect the changes in viscosity during the process are the key criteria for these processes and for product quality (color). 

---