sshep...
As for the liquid rate...we were actually testing another part of our system and only noticed these anomolous results later (because we were monitoring the entire system). We will vary liquid flow in upcoming testing.
Now to your questions...
1) The bottoms from the scrubber...
We recently began startup testing of a new scrubber configuration at our plant. Details:
Column: 6" Pipe
Packing: RMSR 40 (essentially 1.5" IMTP) Pfactor = 24 ft-1
Packing Height: ~4 ft.
Test gas: Nitrogen quenched to approximately 100F
(gas temp could be higher)
Test...
StoneCold,
Thanks for your suggestion. Our process involves very high temperatures - and although we use a series of eductors/quenches to cool the stream - we have a requirement to protect the packing at elevated temperatures that are beyond the acceptable range for plastic packings.
I have...
I am performing some design calculations for a HCl / KOH scrubber. I have calculated the height of a transfer unit assuming that the mass transfer characteristics behave like a HCl / H2O scrubber (but with H+ concentration always at zero because of the excess KOH I know that I have).
Next (and...
By dynamic modeling, I meant batch distillation, drying, etc. - unit operations in which an important process variable is to change over time. Of course, you can also perform dynamic systems control as well.
Also - I meant to say electrolyte modeling - not electrodynamic modeling!! Oh...
I have only used ChemCAD (by Chemstations), which is another process simulation package. It is in its most basic form a steady state modeling tool. However, it can be "tricked" to perform some dynamic modeling. If you want to spend the money, the dynamic modeling add-on can be purchased. The...
Fizzhead,
NFPA 33 outlines a simple method for determining what percentage of the MEC is being reached in a spray booth based on MEC, maximum powder release rate, and air flow rate. It is pretty much the most straightforward calculation that can be imagined.
In the calculations you described...
I have been asked to evaluate a Halar electrostatic spraying operation to determine what exhaust rate is required to maintain the plastics concentration to a value less than 1/2 the MEC (minimum explosible concentration for dust explosions). Does anyone know what the MEC of Halar powder is...
Fizzhead/25362,
Thank you for your posts! The explosion risk I was interested in evaluating was a dust explosion. In regard to dust explosion, any suggestions on how to find a MEC?
Also, to clarify a statemetn you made Fizz, is the spray "plume" something that the electrostatic precipitator...
I posted the following message on the plastics forum - but it doesn't seem to get much mileage these days. Perhaps one of you could help....
A general web search didn't turn up any results and I do not have any plastics literature - so I wanted to run this up the flag pole with you guys/gals...
A general web search didn't turn up any results and I do not have any plastics literature - so I wanted to run this up the flag pole with you guys/gals. Does Halar/ECTFE have an MEC and if so, what is it?
Also, what are acceptable methods for determining source terms that would feed into...
I haven't ran through the calculations - but I don't think I have to. Because of the size of a human's feet, I think that the induced pressure would have very little effect on the freezing point of the solution. With roads, cars do weigh a bit more and the tread is a bit smaller than feet, but...
I tend to agree with your logic about pseudo-first-order. In my case, I am placing a small amount of Li in a large amount of water. I anticipated that I could approximate the rate as first order with respect to Li.
I would guess that the rate equation would be based on something like the...
In reference to my previous post - I believe that I have figured it out. The rate equation given is the temperature dependent form of the rate constant. From this and the the fact that it is second order, the calculations should be able to be carried out. Unfortunately, the equation appears...
Thanks! This seems very close to what I need. The next step is interpreting the rate equation! I notice that the reaction mechanism is not balanced for H2 - instead it is balanced for H. I don't know what impact that has on calculating H2 generation. Do you read the units (cm^3/molecule-s)...
