Which one, the total condenser, the reboiler, or the fractional condenser, counts as one theoretical plate?
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Experts in chemical engineering principles, in the context of the injection chemistry exam and chemical engineering principles, which of the total condenser, reboiler, and fractional condenser counts as one theoretical plate?
The reboiler and the fractionator are each counted as one unit； The total condenser is not included.
What is a fractional condenser? Some exam questions mention that there is a condenser at the top of the tower; does this count as one theoretical plate? What is the difference between a fractional condenser and a conventional condenser?
Theoretical plate: The gas phase and liquid phase leaving a theoretical plate are in equilibrium; since the temperature of each theoretical plate varies step by step, the composition of the material leaving each plate also changes step by step. The reboiler and the demister have temperatures different from those of the other theoretical plates, and the gas and liquid phases leaving these two devices are in equilibrium, thus enabling separation. The total condenser, on the other hand, is completely different. Since it condenses all the gas phase into the liquid phase, the molar composition of the stream entering this device is identical to that of the stream exiting it. This is why the total condenser is not considered a theoretical plate.
Anything that is partially vaporized or condensed constitutes one theoretical plate, while anything that is completely vaporized or condensed does not constitute a theoretical plate
Got it. When calculating the number of theoretical plates, both the top condenser and the reboiler are counted as theoretical plates.
Got it. When calculating the number of theoretical plates, both the top condenser and the reboiler are counted as theoretical plates.