Reactor vent pipe
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For a reaction vessel with reflux, where the gas phase is condensed in a condenser before returning to the vessel, should a tee be installed on the pipe carrying the condensed gas-liquid mixture, so as to connect an exhaust pipe for the non-condensable gases? Could someone who is experienced in on-site operations answer this question?
It is necessary, and usually the non-condensable gas is further condensed before being discharged. In the gas phase, it is secondary condensation.
After the circulating water condenser, another chilled water aftercooler is connected; after this two-stage cooling process, the non-condensable gases are discharged into the process gas
There needs to be a drain; it’s necessary when driving
Of course, it’s necessary; otherwise, it’s easy to experience overheating and overpressure
It’s not connected via a tee; it is directly connected to the exhaust main pipe after passing through the secondary chilled brine condenser, and the absorption tower fan is sufficient to drive it
I’m not sure what type of condenser you are using. For applications involving reflux, if it’s not a pressure vessel, it certainly can’t be a closed system. When selecting a condenser, one should choose a heat exchanger with a tube box at the end; the non-condensable gases are then led out through the ports on the side of the tube box and connected to the exhaust manifold. In both large-scale chemical manufacturing and fine chemical production, VOCs cannot be released directly into the atmosphere – they must first be collected and processed in an exhaust treatment system before being released.
It depends on your medium: if it is non-flammable, connect it directly to the exhaust system; if it is a flammable gas, use a flame arrester before connecting it to the exhaust system