What is the minimum bed temperature in the sulfur reactor?
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The sulfur recovery unit uses a high-temperature mixing method; at low processing rates, what is the minimum allowable bed temperature? Please explain the reason? And what are the things to be careful about when operating it? :handshake
Usually, the bed temperature cannot be controlled; only the inlet temperature can be controlled. If the low processing volume you mentioned falls within the designed range of flexibility (usually 30%), then there is no problem. However, if the load is too low, it is indeed easy for the bed temperature to become too low.
What was said on the 2nd floor is correct; usually, the temperature of the catalyst bed is controlled by regulating the inlet temperature of the catalyst bed. The temperature of the catalyst bed is related to the catalyst’s activity, the ratio of H2S to SO2 in the feed gas, the inlet temperature, and the sulfur content in the inlet process gas. At 30% load, there should be no problem.
It must not be lower than the sulfur dew point; otherwise, this will lead to excessive sulfur accumulation in the bed and incomplete hydrolysis. If it is not possible to maintain the bed temperature, the inlet temperature must be increased to ensure that the bed temperature remains above 300 degrees.
At present, the processing capacity of our unit is below 30% of the original design value, and the temperature of each bed layer is below 200 degrees. However, based on the reaction process, there is a significant amount of liquid sulfur coming out of the human waste boiler and the secondary sulfur cooler; production is not stable at the moment. I wonder what adverse effects might occur when operating under such low load! Please give me some advice!