Relationship between PROII theoretical plate number and packing height
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This post was last edited by hanzhencang on 2010-5-5 at 15:38. Using PROII, the theoretical number of theoretical plates is 281. If we assume 3 plates per meter of packing, that would mean 94 meters of packing – is it necessary to add a margin as well? The packing is metal corrugated packing
What kind of filler have you chosen? It can’t all be calculated at 13 yuan per meter; different fillers have different theoretical volumes
It depends on the type of filler; different types of fillers result in different numbers of theoretical plates~
The performance of fillers like yours is really poor; generally, they cost at least over 20 yuan, and some can even cost over 40 yuan.
The number of theoretical plates corresponding to different fillers varies; those with a larger specific surface area are more efficient. For the same tower equipment, if the number of theoretical plates remains the same, a shorter filler height means a larger tower diameter – it depends on the height-to-diameter ratio.
You have quite a few versions of this tower theory; could there be a mistake in the calculations? What is the system type? The efficiency of the filler can be inquired with the manufacturer.
7# yaodi123: The theoretical number of plates calculated using proii should be correct, haha
What type of structured packing are you using? Dozens of theoretical plates can be obtained per 1 meter. In my opinion, the number of theoretical plates in distillation operations depends not so much on the packing but rather on the quality of the distributor design
Using metal corrugated packing with three theoretical plates per 1 meter seems a bit excessive; it is necessary to take into account the operating pressure of your installation as well
Those on the 4th floor who don’t understand shouldn’t speak recklessly and mislead others. When will the NTSM value of fillers reach the tens? Unless it’s laboratory-grade fillers, in which case the value is only in the teens. If we go by what you say, then chemical plants wouldn’t need such tall towers at all; a tower a few meters high would be more than sufficient
OP, what system are you using PROii to simulate, and why do you need so many theoretical versions? If it’s really that difficult to separate them and requires so many theoretical plates, then it has no practical significance – it’s impossible to build a tower several hundred meters tall, right? Moreover, in the design of fillers that are typically this tall, the requirements for fluid redistribution are very stringent. So, I think there is something wrong with your requirement for separation, or fractional distillation could be considered (different operating pressures can be used, which will result in different relative volatilities of the components)