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[m42364236k]

Dear colleagues 

Good day

I have question about “air separation unit “in methanol production plant

I gave the total O2 consumption and also N2 to vendor to determine the air separation unit capacity (cryogenic method)

In O2 and N2 consumption in our plant, we have three flow rates one for “normal operation” and second one is “maximum flow rate” and third is “peak flow rate”

As we know most of the high-pressure oxygen from “air separation unit” will be used in methanol plant in methanol synthesis reforming

Vendor ask when do you reach to maximum consume of oxygen?  And when do you reach peak consume of Oxygen?

Does your plant work in long time in peak or max flow or just it work in short time?

Vendor suggest if the peak duration is very short, no need to expand the package capacity according to max flow rate ,  because we can use back up tank simultaneity with package normal flow rate to cover max/peak rate but it depend on peak /max duration

I need to know when oxygen consumption reaches to peak flow rate in this plant

 

 

Cheers

Mike 

[Art Montemayor]

Mike:

 

I am responding to your quer(ies) in RED as follows:

 

I gave the total O2 consumption and also N2 to vendor to determine the air separation unit capacity (cryogenic method)
I have to presume you are dealing with an air separation plant vendor and you need to specify the air separation production capacity you need for your methanol production required capacity.  Is that correct?  If not, please explain your query in detail.  The O₂ production rate(s) are what are important - NOT the "total O₂ consumption".  Those rates are your responsibility to specify.  Only you (as the producer) know the production RATES that you require.

 

In O2 and N2 consumption in our plant, we have three flow rates one for “normal operation” and second one is “maximum flow rate” and third is “peak flow rate”
Presumably these are rates for the methanol production requirements that must be met.  Correct?   What are the corresponding O₂ flow rates?  You should know and give those.

 

Vendor ask when do you reach to maximum consume of oxygen?  And when do you reach peak consume of Oxygen?
You are the person (I presume) that knows or specifies when and for how long you will need to operate your O₂ and methanol plants at maximum rates.  Tell the air separation plant sales person that information.

 

Does your plant work in long time in peak or max flow or just it work in short time?
YOU (or your company) are the ones that should know this information.  Our Forum members know nothing about your operation since you have furnished no detailed or basic data on what you are producing, when, and at what production rates.

 

Vendor suggest if the peak duration is very short, no need to expand the package capacity according to max flow rate, because we can use back up tank simultaneity with package normal flow rate to cover max/peak rate but it depend on peak /max duration.
Yes, you could produce an excess capacity of liquid O₂, store it and subsequently vaporize some of it and use it to complement your normal O₂ production when a maximum capacity rate of methanol is needed.

 

I need to know when oxygen consumption reaches to peak flow rate in this plant
Once again, YOU (or your company) are the ones that should know this information.  Our Forum members certainly don't know anything about what you are doing.