Heat Recovery in Sulphuric Acid Production
Sulphur obtained is burned to make Sulphur Dioxide, which is further oxidised to make Sulphur trioxide in presence of a catalyst and finally hydrated to make Sulphuric acid.
Sulphuric acid making process results in generation of high temperature gases. To maximize energy recovery and acid yield , the gases are cooled in boilers, heat-exchange equipment thereby generating high pressure steam which is further used to generate power.
Sulphuric Acid is mainly obtained by burning molten sulphur, from metallurgical off-gases or by decomposing spent sulfuric acid.
Thermal Systems provides WHB system | Heat Exchangers | Pre heating Units for various industrial segments manufacturing Sulphuric Acid.
128 TPH
Largest unit capacity
68 kg/cm²
Steam pressure
284 °C
Steam temperature
27
Installations in hydrogen units
For Sulphuric Acid Plant (Sulphur Combustion Process)
In the sulphur-combustion route, molten sulphur is burned and the SO2 gas stream leaves the furnace at high temperature. The gas is cooled in a waste heat recovery boiler (WHRB), generating high-pressure steam and maximising energy recovery and acid yield.
Thermal Systems supplies fire tube boilers with external & integral gas bypass and water tube boilers with provision for future expansion — references up to 5,500+ TPD plant capacity.
For Sulphuric Acid Plant (Wet Sulphuric Acid Process)
In the WSA process, SO2 gas is produced at the operating temperature of the oxidation catalyst in the SO2 converter. Feeds containing sulphur are oxidised to SO2 by combustion and then cooled to the optimum catalytic conversion temperature in a waste heat boiler. The excess heat from this operation is recovered as steam. The catalytic conversion process reaction heat is recovered between the catalyst beds by superheating of steam.
TSPL supplies WHB | COOLERS | Super heaters for WSA plants
