Is water being added to the sulfur condenser?

There is really no clear regulation regarding this; the flue gas purging in a sulfur production system is a process that progresses from high temperatures to lower temperatures. Initially, water must be added, and as time goes by the amount of water used gradually decreases. It is only when it becomes difficult to control the liquid level that considering draining water and using steam for protection becomes necessary.

What are you trying to ask? I can’t understand it

When using gas to purge sulfur during the shutdown of a sulfur recovery unit, it is generally necessary to drain the liquid level in the condenser to prevent liquid from condensing inside its tubes. However, in practice, draining the liquid level can pose some problems, especially when the volume of flue gas generated by sulfur removal using gas is large and its temperature is high. Personal suggestion: During the initial stage of sulfur removal using gas (especially in units with a large processing capacity), maintain a certain liquid level in the condenser, control the outlet temperature properly, and intensify the cleaning of the condenser’s drain ports to remove as much liquid flow as possible. In the later stage of sulfur blowing with gas, when no liquid flows out from the condenser’s drain port, drain the liquid from the condenser, inject steam at the bottom, and open the top vent to allow steam to flow inside, thereby protecting the heat exchange tubes.

Question: During the flue gas purging process, the boiler continues to receive water normally, and the liquid level is maintained within the specified range until the purging is completed. What problems could arise? In the later stages of purging, the temperature drops; at worst, no steam is generated. How then can the liquid level get out of control?

It seems to mean that the water consumption in the later stage is too low, the opening degree of the control valve is small, making it difficult to automate level control; therefore, a manual valve is needed to adjust the flow or water needs to be added intermittently

Well, I see it happens in such cases. That makes perfect sense then.