The inlet flow rate at the second stage of the propylene separator for olefin separation is outside the specified range
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-At 24 degrees Celsius, the propylene gas is divided into two streams: one stream goes to the inlet of the second stage of the compressor, while the other stream is used as a heat source for the reboiler. It condenses and then vaporizes before entering the inlet of the first stage. Obviously, the pressure drop in the stream that goes directly to the inlet of the second stage compressor is low, resulting in a large flow rate of gas. In contrast, the stream that passes through a control valve and two heat exchangers experiences a higher pressure drop, which naturally leads to a lower flow rate of gas. As a result, the flow rate of gas in the first stage is low, while it is high in the second stage. Does anyone know how to solve this problem?
Can’t the control valve be adjusted? There are no other valves.
The process is quite similar to that of our company; it’s probably designed by the Luoyang Institute. I wonder which company the original poster works for?
They are all LUMMUS process packages, designed by LPEC. Do you guys have this problem as well? How was it solved? The control valve is only present on the line that leads to the heat exchanger; it is because of this control valve that the pressure drop is greater. The flow rate on the line that goes directly to the compressor is higher
There are no control valves at the inlet to the second stage of the compressor; moreover, there are control valves on the pipeline leading to the heat exchanger, which results in a greater pressure drop. This is contradictory and exacerbates the problem of flow deviation. I don’t know what to do
Similar problems exist and have not been resolved yet. Is the load on the propylene units there high? Has it exceeded the design value?
The flow rate in section 1 is below the design value, while the flow rates in sections 2 and 3 are high; the total outlet flow rate is high, and the overall load of the unit is above the design value
We are also facing this issue: the suction pressures in the two-stage and three-stage suction tanks are below the design values, the speed of the propylene reactor is too high, and the steam load is excessive.
The out-of-range issue with two-stage suction was resolved on October 14; it is now operating properly. I hope that similar issues can be discussed separately.
How was it solved? What system are you using? So there are similar phenomena too?
How can I discuss this with you privately? Could you give me your contact information?