Condensate oil in the inter-stage tank of the rich gas compressor
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The condensate oil pressure in the inter-stage tank of the rich gas compressor is approximately 0.35 Mpa; this pressure drives the oil vapor back into the reflux tank at the top of the distillation tower, resulting in an increase in the pressure at the top of the distillation tower. What should be done if the condensate oil does not enter the overhead vapor reflux tank?
The gas has been forced through; are the level gauge and the liquid control valve okay? However, it is generally pumped into the downstream high-pressure tank containing compressed rich gas.
If properly controlled, this situation should not occur; the inter-stage tank is filled entirely with condensed oil, and it is not suitable to store it elsewhere – the best approach is to recycle it through pressure distillation.
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Compared to self-pressurized feeding into the oil-gas separation tank at the top of the distillation tower, what are the advantages of using a pump to feed the rich gas into the compressor outlet liquid separation tank?
The increase in pressure is definitely caused by air entering the system. Normally, when oil is used, the pressure does rise, but this generally does not affect operations or product quality.
Self-pressure to distillation or pumping to stabilization. The reason for the increase in the top pressure of the fractionation tower may be an incorrect liquid pressing method.
Normally, this stream of condensed oil has two outlets: one leads to the vapor-liquid separation tank at the top of the tower, and the other goes to the stabilization unit! Since the volume is relatively small, we use pumps to transfer it to the stable rich gas condensate tank. Personally, I think a fully stable system is more reasonable; after all, the distillate ends up back in the compressor, right? As for the difference, it lies in whether a pump is used or not, due to energy savings! The key is that the amount is small, so the impact is minimal!
Is the flow rate of the cooling water in the intercooler too high, resulting in excessive condensate that affects the distillation tower? If the condensate does not go into the oil vapor reflux tank at the top of the distillation tower, it would be better to install an additional condensate pump to send it to the liquid separation tank on the outlet side of the stabilizer compressor.
Is the level gauge broken, or is there no pressure?