Visit review of Pak Musa Chemicals Multan A Sulfuric Acid Plant Presented/Prepared by Raja Wajahat
May 06, 2015
Visit review of Pak Musa Chemicals MultanA Sulfuric Acid Plant
Presented/Prepared by Raja Wajahat
Process Summary1. Combining of sulfur and oxygen
2. Purifying sulfur dioxide in the purification unit;
3. Adding excess of oxygen to sulfur dioxide in presence of catalyst vanadium pentoxide, with temperatures of 450 degrees Celsius and pressure of 1-2 atm.;
4. Sulfur trioxide formed is added to sulfuric acid which gives rise to oleum (disulfuricacid);
5. The oleum then is added to water to form sulfuric acid which is very concentrated.
Key PointsAll the equipment were made of MS
Big Equipment had Porcelain Lining
Pumps had SS impellers, and special alloys body
The Process Streams need cooling again and again because all the reactions are exothermic
Same Catalyst was being used for last 4-5 years
30 TPD production of the plant
18 employees in total
3 technicians
About 3-4 acre land, 0.5 acre covered
Sulfur Storage
Sulfur Melting PitsSteam Coiled inside the pits
Solid Sulfur to Liquid Sulfur
Sulfur Combustion ChamberS + O2 SO2
Liquid Sulfur + Excess Air
Exothermic Reaction, Maintains its temperature itself
Attached to Waste Heat Boiler
Waste Heat Boiler
Quartz Filled Gas FilterRemoves impurities from SO2 Gas
Also Cools the gas
ConverterSO2-> SO3, V2O5 filled, 4 beds of catalyst, 8 thermal sensors, 2 for each bed, extended lines for increased surface area for cooling,
Absorption Towers [2]SO3 to Oleum and then to H2SO4
SO3 from Bottom
H2SO4 from Top
Porcelian filling and internal lining
Drying Tower Dried Air from bottom
H2SO4 from top
Circulating TankOleum + H2SO4
Recycled with the towers
Cooling EquipmentCooling of the final product
Sent to final Storage tanks
Storage
Process Flow Diagram
Control Room
Thank you