Questions about the use of plate condensers in vacuum systems
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Since the plate heat exchanger has 4 flange connections of the same diameter, under vacuum conditions it cannot be connected directly to the vacuum source; instead, it is usually connected to the outlet pipe of the material to be condensed. For example, the vapor-phase material enters through a pipe with a diameter of DN350, while the liquid-phase material usually uses a pipe with a smaller diameter of DN80. Is it possible for me to install a tee on the DN350 pipe to connect it to the vacuum pipeline, and then reduce the diameter to that of an DN80 pipe for the liquid discharge? A small buffer tank still needs to be connected to the liquid-phase outlet pipe to prevent liquid from being carried in under vacuum. How should the volume of this tank be determined? If there is a formula, please let me know.
A gas-liquid separator can be installed at the outlet of the exhaust liquid; by controlling the gas flow rate to 1–3 m/s, the liquid can be separated by gravity.
Thank you, but the gas flow rate is too low. For vacuum pipes, I usually use a flow rate of 30–50 m/s when selecting the pipe diameter