How to determine the composition of the gases at the outlet of the sulfur incinerator
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I have experience with sulfuric acid plant design, but I’m not sure how to determine the composition of the gases exiting the sulfur incineration furnace – is it based on experience or through calculations?
It should be based on calculations, with adjustments made using experience.
The composition of the gases at the outlet of the sulfur incineration furnace can be determined through testing, while engineering design generally relies on calculations.
I actually think that tests aren’t necessarily more accurate than calculations, haha – just my opinion
But the device hasn’t been installed yet; the equipment hasn’t been manufactured either. We’re just in the design stage. How can testing be carried out?
The composition of the gases exiting the sulfur combustion furnace is determined, that is, the SO2 concentration in the exhaust gases is determined. It is related to catalyst performance, the conversion process, and the desired conversion rate. If the concentration is too low, the specifications of the equipment and pipelines must be increased, resulting in higher construction costs. Too high a concentration requires a large amount of catalyst, making it difficult to ensure the final conversion rate and exhaust emissions. In actual operation, manual analysis and testing or continuous online monitoring can be used, or the SO2 concentration can be inferred from the temperature inside the sulfur combustion furnace.
Calculations can be used to determine the amount of SO2 (assuming that all of it is SO2 and no SO3 is produced), but in reality SO3 is formed as well, and there are other reactions taking place; therefore it’s not possible to determine the amounts of SO2, SO3, and O2
When the SO2 content is between 8% and 11%, 2% to 4% of the SO2 in the sulfur burning furnace is converted into SO3, with the SO3 content generally ranging from 0.3% to 0.5%.
When the SO2 content is between 8% and 11%, 2% to 4% of the SO2 in the sulfur burning furnace is converted into SO3, with the SO3 content generally ranging from 0.3% to 0.5%. So how much should I use as a basis for my design?
Under normal circumstances, during the design phase, the SO2 concentration is first determined – whether it is 10% or 11% – after which the temperature inside the furnace is calculated. The equilibrium conversion rate is then used to determine the amount of SO3 present. Different temperatures require different lining materials for sulfur combustion furnaces. The equipment and pipelines in such systems also need to be adjusted depending on the gas concentration. In foreign designs as well as those for very large-scale installations, the SO2 concentration is usually relatively high, while domestic designs and smaller-scale installations use a lower SO2 concentration. What is the scale of the installation you are designing? If needed, I can help you develop a systematic plan.
You can use 0.3%, which is the value adopted in most domestic designs. Engineering calculations and theoretical research are two different things. I think you are dealing with engineering calculations rather than theoretical research; using values based on experience is more than sufficient to meet the requirements of engineering design.
When the SO2 content is between 8% and 11%, 2% to 4% of the SO2 in the sulfur combustion furnace is converted into SO3