Issues with acidic gas venting in sulfur recovery units?
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The wastewater gas, which contains acidic gases, and the purified acidic gas from solvent regeneration pass through water seal tanks before being flared; fuel gas is added in front of these two water seal tanks to assist in combustion. What are everyone’s thoughts on this design? ? ?
I’m not very familiar with the process; it would be best to show me how it works so I can learn* it as well
The wastewater gases, which contain acidic gases and the purified acidic gases from solvent regeneration, pass through water seal tanks before being released into the atmosphere. Fuel gas is added in front of these two water seal tanks to assist with combustion; releasing such gases directly into the atmosphere through combustion does not meet environmental protection requirements – specifically, it fails to comply with the standards set out in the \"Integrated Emission Standards for Air Pollutants\" (GB16297-1996), where the allowable SO2 concentration is 960 mg/m3. Secondly, what do you do about the small droplets of S that may remain after combustion? ? ? ? ? ? ? ? ? ? ? ? ? 、
Are you saying that the function of the water seal tube is to remove sulfur particles? Then why not put one behind the incinerator? The acidic gas from our plant goes straight to the incinerator if it’s not used
Fuel gas is added because ammonia can only be decomposed under very high conditions; raising the temperature is used to facilitate this decomposition, and it also helps to ensure that acidic gases are completely burned off.
In cases of abnormal acidic gas conditions, it is necessary to burn it in a flare. Before being sent to the flare, the acidic gas passes through a liquid separation tank and a water seal tank; after passing through the water seal tank, some gas is mixed with the acidic gas in order to raise the temperature of the flare tip and ensure complete combustion of the acidic gas.
It is understandable that after the accidental release of acidic gas into the water seal tank, fuel gas is added under the control of instrument skids. But fuel gas can be manually added in front of the water seal tank; I don’t understand why it’s necessary to add it manually there at that point ? ?
It seems like everyone is not answering the right question. I’m not sure if it’s because I haven’t understood the process; it would be good to explain the process as I’m quite confused
In the event of an acidic gas incident, the acidic gas released from the pressure relief tank at the top of the tower is discharged into the water seal tank, and after passing through the control panel, it is sent to the flare for combustion. I just don’t understand why fuel gas is manually added before reaching the water seal tank ? ? When should the fuel gas be added? ? ?