It's done in CorelDRAW which is vector software not a bitmap. You have a lot more flexibility with vector drawings, but have to export them as a bitmap when finished.
The vapour circuit is from the connection on the top of the tank, through the condenser,back up and right to the venturi, which creates the suction/circulation for the circuit. The distillate (Water or Methanol, depending on the process) drops out in the condenser and runs into the distillate collection vessel. As the flow of distillate is very small it doesn't need a separate vent because it vents up the same tube.
