Regarding sulfur dioxide gas concentration

Sulfur dioxide (SO2) is a very important intermediate in the process of producing sulfuric acid from sulfur. In the sulfur incinerator, sulfur is burned to produce sulfur dioxide. However, the concentration of sulfur dioxide in this process generally does not reach 15%, and this is mainly due to the following reasons: 1. **Reaction equilibrium:** The reaction between sulfur and oxygen to produce sulfur dioxide is a chemical equilibrium reaction. At a certain temperature and pressure, the reaction reaches an equilibrium state, at which point the concentrations of the reactants and products remain constant. If the reaction conditions remain unchanged, the concentration of sulfur dioxide will not exceed this equilibrium concentration. 2. **Reaction kinetics:** Even from a thermodynamic perspective, the reaction can produce higher concentrations of sulfur dioxide, but the rate of the reaction may limit its formation. If the reaction rate is slow, then the concentration of sulfur dioxide may not reach 15% within the time frame we observe. 3. **Equipment and operational limitations:** The design and operation of sulfur burners may also limit the concentration of sulfur dioxide. For example, if the temperature, pressure, oxygen supply, or mixing ratio in the furnace are not suitable, then the concentration of sulfur dioxide may fail to reach its theoretical maximum value. 4. **Safety considerations:** Sulfur dioxide is a toxic and corrosive gas; if its concentration becomes too high, it may pose hazards to equipment and operators. Therefore, for safety reasons, the concentration of sulfur dioxide is usually limited. These are the possible reasons why the sulfur dioxide concentration cannot reach 15% in the sulfur burning furnace. .

There are specific ratio requirements for SO2 and oxygen entering the conversion unit