I need help understanding the relationship between the size of the concentration line in the low-temperature methanol wash regeneration tower and the temperature of the sulfur recovery furnace
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The low-methane concentration line was reduced in operation, and the temperature of the sulfur recovery furnace dropped. Was this temperature drop caused by a lower level of hydrogen sulfide, or was it due to an increase in the amount of inert gas entering the sulfur recovery system? What is the principle behind their effect?
If we consider the recovered low-methane gas to be 100%, then a low hydrogen sulfide concentration and a high proportion of inert gases are essentially the same thing; it’s just a matter of looking at it from a different perspective. However, I personally think that the decrease in furnace temperature is more related to inert gases, because even at low concentrations of hydrogen sulfide, its combustion still releases heat; whereas inert gases have an flame-retardant effect or participate very little in the reaction.
The main uncertainty regarding the underlying cause of the low furnace temperature is whether it is the low hydrogen sulfide concentration, which results in less heat release during combustion, or the fact that inert gases carry away more heat, thereby causing a drop in furnace temperature.
You will need to calculate the amount of heat released by hydrogen sulfide and the amount of heat absorbed by the inert gases in order to make a judgment; just do a rough calculation! It’s obvious at a glance!
It’s just that this is hard to calculate, because the concentration isn’t clear
Don’t you usually do quality analysis? Analysis of the gas phase at the top of the quench tower, and analysis of the gas phase at the top of the absorption tower – with these data, it is possible to obtain at least an approximate idea of the concentration of the components present in the solvent. For the regeneration tower, assume that everything has been analyzed – but the concentration in the gas phase is unknown?
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