Sulfur recovery
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I’ve never dealt with this before – when should steam and nitrogen be used for the protection in front of the sulfur production furnace? I’d appreciate some guidance from everyone
There isn’t enough information to have a proper discussion; first consult those around you. Once you can clearly articulate the key points of your problem, it will be almost solved
The protective steam used in front of the sulfur production furnace is generally employed when the plant is shut down. When starting the sulfur-purging process during shutdown, if gas is used for this purpose, its combustion occurs in a stoichiometric manner; to prevent incomplete combustion of the gas and resulting carbon deposition on the catalyst, an appropriate amount of steam is introduced into the furnace along with the gas in a specific ratio. Nitrogen is automatically introduced when the sulfur production furnace is started up or shut down, serving to displace air.
We are performing a preliminary furnace heating process; protective steam is introduced when the furnace temperature reaches around 800 degrees. Is it necessary to do this during the first furnace heating in this preliminary process (since the catalyst has not been installed yet)?
I remember that this road wasn’t open when we first started work, not even before the catalyst was installed!
Steam is used to adjust the temperature; if the temperature is too high, it can be adjusted by releasing steam. The nitrogen is used for purging during ignition.
There is no need to use steam during furnace drying; steam is mainly used to prevent carbon deposition. During drying, combustion occurs in an oxygen-rich environment, while gas burns completely, so there is no issue of carbon deposition – hence, there is no need for steam.
The nitrogen supplied in front of our furnace serves both as a protective gas that is provided in small amounts continuously, and it can also affect the temperature readings from thermocouples or flame detectors. In the event of an interlocked shutdown, the nitrogen cut-off valve will open automatically to purge the area for ten minutes before closing again