MESSER SOLUTION
When oxygen is used as the oxidising medium, the nitrogen burden of the air is reduced and replaced by process gas containing sulphur dioxide, which can lead to a considerable increase in sulphuric acid production.
Advantages:
- Increase in performance (Debottlenecking) of existing plants
- Reduced heat losses
- Flue gas conditioning
- Increase in turnover and yield
- Lower energy costs
- Improved product quality
Table: Comparison of waste sulphuric acid process with and without oxygen input:
| without O2 | with O2 | |
| quantity of spent sulphuric acid [%] | 100 | 152 |
| spec. energy consumption [kcal/KG SA] | 2421 | 1724 |
| air flow rate total [m3/h] | 3500 | 3500 |
| O2 flow rate total [m3/h] | 0 | 327 |
| spec. O2 consumption [m3/t SA] | 0 | 252 |
| O2 concentration equivalent [% Vol] | 21 | 27,8 |
The use of oxygen allows a significant increase in production and reduces the specific energy consumption per kg of sulphuric acid.
