How is the flow rate of the released gas calculated?
Thread Content
Volume of fresh gas * % of inert gas = Volume of recycled gas * % of inert gas. I’m not sure if this is correct; experienced technicians, please help explain how you control it. Thank you
System pressure is used to control the flow rate of the vent gas
That’s not correct. According to material balance: (inert gases do not participate in the reaction) Volume of fresh gas * percentage of inert gases = Volume of vent gas * percentage of inert gases + Dissolved gas (vaporized gas) * percentage of inert gases. Last edited by ARMPSA on 2009-3-26 at 13:23.]
Volume of fresh gas * % of inert gas = Volume of vent gas * % of inert gas + Volume of dissolved gas (vaporized gas) * % of inert gas. It’s too specific; the volume of dissolved gas can be ignored. Normal production is the primary principle; secondly, it depends on the synthesis pressure to control the amount of vent gas. Of course, if the pressure rises or falls sharply, large-scale switching is required; when necessary, the emergency relief valve must also be activated
Obviously, it’s not right. It’s simply a matter of material conservation: the volume of fresh gas * the percentage of inert gas = the volume of vent gas * the percentage of inert gas in the recycled gas. Nothing else needs to be considered; the solubility of inert gases in methanol is very low, so it can be ignored ；
In actual production, the flow rate of the vent gas is adjusted based on the pressure of the synthesis system, the amount of circulation, and the content of inert gases!
The guys upstairs are overcomplicating things! When the device is operating stably and there are no significant fluctuations in the flow rates of various systems: the flow rate of the vent gas = flow rate of fresh gas – flow rate of gases consumed in the synthesis reaction (calculated based on the amount of crude methanol and its composition)
Volume of fresh gas * % of inert gas = Volume of vent gas * % of inert gas. This is too specific; the dissolved gas is ignored. During normal production, adjustments are made in a timely manner based on changes in the catalyst bed temperature and system pressure, with the main goal of maximizing methanol production.