The amine solution in the acidic gas stream enters the sulfur production combustion furnace
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If the amine solution solvent from the regenerated acidic gas enters the sulfur production combustion furnace, what will happen inside that furnace? What impact will it have later on? Please share your thoughts, thank you, extra points
Do you mean mist entrainment, or water entering the furnace directly?
First, identify the cause of the amine solution appearing in the acidic gas stream (it is likely due to foaming of the amine solution) and take action to address it; the amine solution must not be allowed to continue entering the acidic gas. If the amine solution enters the sulfur production furnace, the furnace temperature will definitely experience significant fluctuations, which could potentially affect the catalyst bed in the converter.
Before the acidic gas enters the furnace, it passes through a liquid separation tank; it is unlikely that a large amount of liquid amine will enter the furnace. Personally, I think it should be a certain amount of mist, carried into the sulfur production furnace along with the acidic gases. I have encountered a situation where, despite no significant changes in the furnace temperature or the flame, the sulfur produced was not dark red in color; instead, its color was lighter, turning bluish. Since the duration is short and mixing occurs after entering the liquid sulfur tank, it has almost no impact on the quality of the liquid sulfur product. No effects on the device thereafter have been observed yet.
When a large amount of liquid (amine solution) enters the furnace chamber of the sulfur production furnace, the temperature rises rapidly; in severe cases, this can lead to accidents.
What is the reason for the rapid rise in temperature? What kind of accidents could occur?
Our unit has experienced a situation where a large amount of amine solution entered the furnace; the amine solution, along with acidic gases, emerged from the fan inlet and the viewing ports, and it also reached the catalyst bed. The device was shut down urgently. Black sulfur was emitted for several days after operations started.
How did such a large amount of amine solution get in? How can the amine solution, which contains acidic gases, come out from the fan inlet? Are there any analysis documents on the accident handling process? Accidents like this are worth studying carefully by everyone*.
This phenomenon tends to occur when acidic gases, collected from units such as catalysis, coking, and wastewater stripping, enter the sulfur unit. The main reason is fluctuations in the operation of the upstream units, which result in a large amount of liquid being present; this is also caused by the fact that the acid gas separation tank in the sulfur recovery unit is too small, or by unreasonable designs of the inlet and outlet ports of the separation tank. A large amount of liquid entering the high-temperature furnace chamber will vaporize rapidly, causing the system pressure to rise and an accident to occur. :The check valve at the L fan inlet is unreliable and lacks a safety factor. :L
After rapid vaporization, the gas pressure rises; wouldn’t a large amount of gas flow toward the rear sections where the pressure is lower, rather than going toward the fan outlet where the pressure is higher?