Problems with 1-to-3 centrifugal compressors
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The continuous reforming unit is equipped with a centrifugal compressor of the 3-on-1 type, along with a 3C control system that regulates the amount of hydrogen sent out to maintain system pressure. Since the beginning of this year, the flow rate at the inlet of stage 1 has been decreasing continuously; the pressure at the outlet of stage 1 has also dropped, as has the pressure at the outlet of stage 2. The anti-surge valve in stage 2 closed down, and the energy consumption of the unit increased. I suspect that ammonia salt crystallization may be causing blockages in the inlet filters of stage 1 or stage 2. I wonder if the seniors here have experienced this or have any other thoughts? I hope to get your guidance; thank you so much! Provides 3C system control points.
I don’t know what type of pipeline filter it is; if it’s a T-type filter, the filter element can be removed, and in that case the filter functions just like the pipeline itself. There will be no pressure loss nor clogging. It is possible that the flow passage is blocked, with crystals adhering to the flow channels, which reduces the performance of the impeller and lowers its efficiency.
If the instrument readings show no issues, it can generally be determined that there is an increase in resistance somewhere in the intake system; therefore, it’s necessary to check each component of the intake system, such as the pipes, filters, valves, and circulation tubes.
Is there no way to determine the filter differential pressure?
The filter is clogged or the flow channel is blocked
Thank you. . . It seems that the secondary inlet filter might be clogged, as the secondary compression ratio has decreased significantly
The secondary inlet filter is clogged; it’s likely due to ammonium salt crystals, along with some catalyst dust
No,,, the 3C control system has been reconfigured; there is a pressure gauge in front of the filter
Check the filter pressure difference; if there is no pressure difference gauge, compare the pressures on the gauge at the front and back
The first, second, and third stage filters were all clogged; after shutting down the unit, it is now operating normally.