Increase in pressure drop in the sulfur production system
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Due to the low temperature in Stage 2 some time ago, cross-line heating was used to raise the temperature of the bed in Stage 2; after about 10 hours, the normal operating procedure was resumed. In less than a day, the system pressure drop increased again. The outlet temperature at Stage 1 was 246°C, which is a bit low. When the bed temperature was raised to 320°C, the outlet temperature at Stage 1 was only 263°C. It is suspected that there may be blockages in the process gas heat exchanger or in the secondary cooling tube bundle. It’s not clear what substance is causing these blockages and affecting the heat exchange efficiency – could it be carbon deposition, sulfates, or catalyst dust?
Were there no major fluctuations in production before? What about the outlet temperature of the heat exchanger? I tried to measure the pressure drop of the following devices, using a pressure gauge to take readings at the sampling ports.
I also used one gauge for the measurement. After they removed the tubes from the primary and secondary cooling as well as the process gas heat exchangers, there was no problem at all. When the flow went through the bypass line, the pressure dropped significantly; however, it didn’t work when following the normal flow path
The problem has been found – the collector is blocked. Thank you everyone~