Regarding the drive of centrifugal compressors
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Regarding the choice of drive type for large centrifugal compressors: 1. Motor, 2. Turbine, 3. Other. I would like to ask whether, in the case of turbine drive, a gas turbine driven by coal-derived gas can be used as a fuel for propulsion Is this reasonable? Compared to motor drive, which is more cost-effective at the same power level? Furthermore, for high-power compressors, what are some other cost-effective driving methods?
As far as I know, gas turbines use natural gas as fuel. Does the coal-based gas you mentioned refer to natural gas produced from coal, or synthetic gas? If it can be driven by syngas, it would indeed be a good driving method.
For the drives of large centrifugal compressors, steam turbines are now commonly used, as they are energy-efficient and environmentally friendly, allowing for energy recovery and reuse
I'm talking about syngas. Some research has also been conducted in China; perhaps the manufacturing processes and control technologies are not yet fully developed
The components of syngas are affected by the system; if it is used as fuel for gas turbines, this will inevitably impact the operation of the compressors. Therefore, large compressors are usually driven by steam turbines, which ensures stability in the power system and allows for the reuse of waste steam, thus saving energy and being environmentally friendly.
Large ones use steam for general purposes; they are environmentally friendly, consume less energy, and are more energy-efficient. Smaller units use motors more frequently
The gas turbines used in current IGCC systems rely primarily on coal-derived syngas as fuel, which represents a typical form of clean coal power generation. For turbines, the problem is not significant; there are already some demonstrations both domestically and internationally, with power generation capacities of over 200 MW. However, for other gases, such as directly burning hydrogen, zero CO2 emissions can be achieved, but due to issues related to materials and other factors, there are few demonstration units for hydrogen-fired turbines.
So far, I have seen those driven by electric motors; another type is driven by steam turbines, and there’s also the flue gas turbine (driven by flue gas). The flue gas turbine is mainly driven by an electric motor – once the equipment is operating properly, the turbine is started up. When the turbine can function as a drive unit, the electric motor is turned off