Yes, your answer in your original post was correct. I actually calculate 1667 m3/hr of the higher concentration VOC gas. I look at the problem as an VOC balance between the 2 conditions...
36(x) = 10(6000) ==> x = 1667 m3/hr
If the compontents are the two VOC gas streams are the same.
I...
No one seems to have input here so I'll give it a shot.
First of all there are many design parameters that affect the sizing of a combustion chamber; nozzle sizes, temperatures (insulation characteristics), heat content of the gases to be burned and probably a dozen others. Without knowing the...
Everything everyone has said is true, but many zeros-1 needs to understand that under ideal conditions the liquid to vapor displacement rate is 1:1. However, in practice, there can be a vapor growth rate associated with the transfer. The vapor growth rate will depend on the vapor pressure of...
My opinion, (and you know what they are like)do lots of practice problems. I used the Robinson book to during my practice to learn how to do the problems, it was good, but I don't know about the Lindeburg book.
The references I took for to the exam make very little difference, because I hardly...
Many times electrically driven equipment will be raised to prevent it from being inside an electrical classification area for which it is not suited. In most cases the electrical classifications are delineated by company standards. Since ethanol vapors are heavier than air, at least the bottom...
You are welcome.
The relationship between air and other gases is:
scfh Air = scfh gas*(MW gas/29)^0.5*(14.7/P)^0.5*(T/520)^0.5
You can use the spec. gravity instead of MW so...
8098 scfh = x scfh * (0.773/1)^0.5 or
x = 9211 scfh of the gas. So your H2S mass emissions becomes 53.8#/hr.
Glad...
OK, the flow rates they gave you are probably for air at standard temperature of 60 deg. F. Depending on how accruate you want your answer, you should confirm that their values are for air and its temperature. The gas that you are relieving from the tank is probably not air, so ultimately, you...
I guess I don't know what information you are looking for. You have described a condensation and carbon canister system in your initial post. Combustion is not a possiblity and Refrigeration and Carbon PSA are too expensive. Please help me understand what you are looking for.
jwy
A carbon adsorption VRU will handle the application, however for it to be cost effective the tank vents should be connected into a single header and routed to the VRU. John Zink Company and Jordan Technologies manufacture this type of equipment.
See...
The EPA usually provides guidelines to measure emission or estimate emissions. AP-42 are methods to estimate emissions from sources were they are unknown. I have never heard of an instance where the EPA has dictated to a manufacturer how they are to determine the capacity of their equipment...
No problem.
I'm not familiar with the term "air release coefficient", but I suspect it is the same value that the GPSA handbook calls K = coefficient of discharge. If you have contact with the manufacturer, you may confirm that. If it is, I think that K value in addition to the discharge...
This should be a fairly straight forward calculation. You can calculate the mass of H2S from the concentration you stated if you can determine the capacity of the 8 psi PRV. Usually, the PRV manufacturer will provide a flow curve with which you can calculate that flow rate. The additional...
Check out this website http://www.vaporcontrol.com/carbonequip.html
It has general information on carbon adsorption systems along with a few others. Links at this website will also connect you with manufacturers.
I believe they will also work with Methanol. I know they will work with...
In most areas, some type of vapor control system will be required for gasoline and ethanol storage tanks. (I am assuming the location of the tanks are in the US.) As IFR states, you can install Internal Floating Roofs on the tanks to control the vapor emissions(IFRs). However, blanketing will...
I concur with sshep. Most strapping tables, I've reviewed are stamped and certified by third party inspection companies like Caleb Brett. But there are many others.
cheers,
jwysmooth
The term "permissive" can mean many things that only a cause and effect can totally define. If you are unsure, you need to clarify the effect losing a particular permissive should have.
However, generally the permissive is a "cause" that has the "effect" of shutting down or turning off a...
I'm not sure if there of regulations for vent stacks other than what is required for air permitting. There is a device called a "molecular seal" that is basically an inverted can inside a larger containment that mounts in line with the vent pipe. Normally it is used in a flare line to minimize...
For the blanketing system to be an affective method of emission control, the pressure of the blanket gas needs to be substantially higher than the vapor pressure of the liquid product in the tank. In large storage tanks, typical of what you would see in a fuel storage facility or pipeline...
I may not know all the reasons tanks are blanketed, but I know in my field, large storage tanks with hydorcarbon liquid are sometimes blanketed with natural gas or nitrogen to insure there is no oxygen in the vapor space above the liquid. Without oxygen, there is not potential for an combustible...
