3 replies to this topic

[harshida]

Hi i'm working in MFL india . we are using UTI total heat recycle process for manufacturing Urea

I need help regarding prill tower height and diameter.

How do we calculate tower height and diameter for particular production load?

I found some prilling articles in Library .http://www.ureaknowhow.com/urea_j/en/round-table.html
 prilling.pdf   764.04KB   189 downloads

From this attached article ( 5.9.1 Large scale results with Urea Page no 138-146) i need some help.

Why do we include correction factors? ( uncorrected solidification time and corrrected solidification time ) ( page no 141) - What is difference between them/

why didn't we take gas( air ) superficial velocity to calculate tower diameter?

what is the significance of phase transfer number on prill solidification time? ( page no 141)

Any body did calculation regarding this ..?

[breizh]

Take a look at Perry's chemical engineers handbook , there is a section about spray drying with an example about Urea.

Hope this helps

Breizh

[harshida]

Thank you for your reply..

i'll go through it. check it out

[hafeez]

At the design stage, what is the effect of moisture in the prills on prill tower diameter.