Centrifuge and reciprocator in parallel
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Our 1 million tons per year diesel and gasoline mixed hydrogenation plant is set to install a new hydrogen-induced dew point depression reactor. According to the requirements of the technical plan, the flow rate of the recycle hydrogen compressor (centrifugal type, driven by a turbine) needs to be 100,000 NM3 per hour, whereas it is currently only 80,000 NM3 per hour； We plan to modify a reciprocating hydrogen compressor to be used as a circulating hydrogen compressor, operating in parallel with the existing centrifugal compressor in order to achieve the required flow rate. Due to the pulsations associated with reciprocating compressors, we are unsure of the impact that operating them in parallel will have on the process operations and the equipment I would appreciate your advice.
A buffer tank needs to be added in the middle to mitigate the pulses.
The centrifuge and the reciprocating machine are connected in parallel; pay attention to the reflux from the reciprocating machine
If two machines of different types are connected in parallel, the most economical and convenient way to regulate flow rate and pressure is by using a centrifuge. However, changes in the centrifuge’s rotational speed can cause the reciprocating machine to become overloaded, which makes operation complicated; the focus of the modifications is therefore to increase the flow rate of the centrifuge.
I’ve never seen it, and it’s the first time I’ve heard of it.
Pay attention to the matching of pressure and flow rate, especially the pressure matching.
It can only be said that the technical design is somewhat inappropriate; under normal circumstances, the design allows for a wide range of adjustment options for centrifuges. The flow rate has decreased by 20%; it is necessary to pay attention to the performance curve of the centrifugal compressor to prevent surging during operation (since the backpressure remains constant while the inlet flow rate decreases).