5 replies to this topic

[Shishir Vikash Singh]

In DAP plant, maintaining moisture content in the product is one of the most important parameters and hence a dryer is needed to dry the product after granulation.

 

Here is mass and heat balance on the dryer in the running condition. Air flow rate required has been calculated for drying the product based on heat balance and hence the specific consumption of FO(furnace oil) per tonne of production of DAP.

 

Hope you all like it.

 

Regards

Shishir Vikash Singh 

Attached Files

•  Dryer design and calculations- Revised.xls   55.5KB   375 downloads

Edited by Shishir Vikash Singh, 23 December 2013 - 02:51 AM.

[Vinay Dutta]

Respected Sir,

 

Firstly above mentioned Process Calculation was so educating and useful to me. That was a really smart & simple way to balance Heat & Specific consumption for dryer in fertilizer industry.

 

I humbly request you to post similar calculations for a counter current (air) product rotary drum cooler along a fertilizer (DAP) production processing line.

 

In anticipation of an encouraging reply.

Vinay Dutta

Chemical Engineering student

[Shishir Vikash Singh]

Dear Vinay,

 

It is good to see that you took interest in going through the dryer heat balance calculation. Since you are a chemical engineering student, I would request you to go through the calculation sheet which is a part of my above post. It will make your concepts stronger. If any doubt, use this forum to clearify it as our seniors and colleagues here are really very helpful.

 

Whenever I ll get time in near future, I ll post the similar heat and mass balance for counter current (air) product rotary drum cooler in DAP plant.

 

Regards

Shishir

[rahul.gopnarayan]

Thank you very much mr. shishir

[TS1979]

The heat balance sheet is very concise. If you use exhaust gas to dry the granulates, you probably need to do a combustion heat balance calculation as well because the fuel oil enters the furnace at one temperature while the outlet is exhaust gases - mostly H2O, CO2, N2 at higher temperature. If you use furnace to heat the air and air to dry the granulates, then you need to know the heating efficiency to calculate the required fuel oil

 

Thanks

[Shishir Vikash Singh]

Dear Sir,

 

Your suggestions are very valuable. If you could have noticed the calculation sheet in my excel work, I have tried considering the availability of oil for calculation of FO required. I will try to amend my calculation as per your suggestion and will make it even more precise.

 

Regards

Shishir