Advantages of using a steam turbine to drive the circulator in the cracking unit!
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The circulators used in hydrocracking are generally centrifugal compressors driven by steam turbines; nowadays, many systems also use motor-driven centrifugal compressors. I would like to ask those of you with experience: what are the advantages and disadvantages of using steam turbine-driven circulators compared to those driven by motors?
Steam drives use steam, while electric drives use electricity. For electric drive speed control, an inverter is required, while steam drive allows for high speeds. Those with steam can use steam drive, while those without steam use electric drive.
Turbine-driven systems are relatively stable and safe; motor-driven systems can’t tolerate even two power outages in a year!
The motor-driven system stops immediately when power is cut off; generally, such a large motor isn’t connected to the emergency power supply. It’s driven by a turbine, and steam isn’t available suddenly just because there’s no power. The motor casing of the oil station is connected to the emergency supply, allowing the circulation pump to keep running for a while longer and giving the system more time to respond
First, let’s talk about electric drive: power outages can cause voltage fluctuations, which can harm the circulation pump. Let’s talk about pneumatic drive, which prevents the circulation machine from stopping immediately, thus giving people time to take action. There were also power outages; as soon as that happened, the gas supply was interrupted. Other devices could provide gas to it in order to fully protect the compressor.