Hot air temp. is kept according to the requirement from moisture of material. Your flue gas temp of 150 deg cent will not serve the purpose as material, even at 30-35 % moisture level, will require 300-350 deg cent. Also, for 50 % material, the temp may be used at about 500-550 deg cent.
Flow rate will be around 10,000 cmh.
This I have mentioned to you earlier also. The dryer is flexible at the joints, i.e., at the bends. So, you can take a 90 deg turn at any of the joints. Hence, including HAG, the dryer size could be 30 x 15 ft or 25 x 25 ft. with a height of about 29 ft.
We, as a Briquetting Press manufacturer., recommend Hot Air Generator, using thermal heat with briquettes or biomass as raw material, to be the source.
We use a SS chicken mesh at the outlet of furnace, which is sufficient to arrest any leftover spark in the flue gas, after it has travelled through 2-3 ups & downs in the Furnace.
With 50 % input and 14 % output of bagasse, CTD dryer will give an output of approx. 1500 kgs/hr.