Start-up extractor in methanol synthesis
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What is the purpose of the start-up extractor in methanol synthesis? How does he work specifically?
I assume you’re referring to the start-up injector, whose function is to use high-pressure steam to heat the synthesis tower to the temperature required for gas introduction. Working principle: The potential energy of high-pressure steam is converted into high-speed kinetic energy through nozzles, which drives the cold water inside the synthesis tower to mix thoroughly in the mixer section of the ejector, thereby achieving the purpose of heating.
When the synthesis tower is fed with fresh gas, its temperature must reach the active temperature of the catalyst; the start-up injector is used to heat the synthesis tower using high-temperature, high-pressure steam. As high-pressure steam passes through the nozzle, its internal energy is converted into kinetic energy; the pressure at the nozzle decreases, which in turn drives the circulation of water within the synthesis tower and ensures that the temperature is uniform throughout the tower
In my opinion, this gas is used to supply heat to the synthesis tower; the steam velocity should not be too high, otherwise the tower will vibrate violently, which can damage its internal components. A suitable velocity is preferable. At the same time, for different technologies, it is also necessary to consider whether desalinated water or steam should be introduced first; each specific case needs to be evaluated on its own. Sorry!