Why does the system pressure drop increase when there are hydrocarbons in the acidic gas stream at the inlet of the sulfur production combustion furnace?
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Why does the system pressure drop increase when there are hydrocarbons in the acidic gas stream at the inlet of the sulfur production combustion furnace? Can a exhaust gas incinerator experience secondary combustion?
When the hydrocarbon content in the acidic gas fluctuates significantly, insufficient or delayed air supply may occur. The combustion of hydrocarbons in an oxygen-deficient environment leads to carbon deposition on the surface of the catalyst, resulting in an increase in system pressure drop.
Hydrocarbons in acidic gas can lead to an increase in air supply volume, an increased load on the facility, and a rise in system pressure. Operations will return to normal once the hydrocarbon content in the acidic gas returns to normal levels and the air supply is back to normal； If acidic gases contain hydrocarbons and the air supply remains unchanged, carbon black will be formed and adhere to the surface of the catalyst, leading to carbon deposition on it. In mild cases, this affects the processing capacity of the plant; in severe cases, it can cause the plant to stop operating.
The secondary combustion in the exhaust gas incinerator is usually caused by insufficient air supply to the sulfur production furnace, resulting in incomplete combustion and reaction of hydrogen sulfide, which is then carried into the exhaust gas incinerator and leads to secondary combustion.
Can’t having a hydrogen sulfide absorption tower in front of that exhaust gas incinerator prevent this kind of secondary combustion?
It is impossible to achieve 100% complete absorption