Spin Tables

Spin tables:

Spin tabel cross section 

• A spin table is mainly a mixture and a container for mix and fine the feed comes from feed tank to the spin chamber.
• The main heating air is blown from the HAG to spin chamber and feed from feed tank to spin chamber both process done together.
• Here an cross section view for spin tabel it consists of a screw feeder and jaws for fine the feed material.

Hot air generator (HAG)

Hot air generators

Different Types :

• Direct fired : A direct fired HAG means it uses a fuel as directly to combust and heat the medium.
• Fuel is being burn and directy used to heat the ambient air to required temperature.
• This  type of HAG is more poultant and create more hazardous gases.
• Till it has high efficiency to get desire work output.
• It has normally 90% - 95% overall working efficiency. 

• Indirect fired : A indirect fired HAG is indirectly uses fuel to combust the heating medium. It should be air, liquid. 
• It does not creative any hazardous gases and cleanly supplys heat to a medium.
• It's design is more complicated than direct fired HAG.
• It has overall 80% to 85% efficiency. 

Fuel used for firing: 

• Coal fired
• Wood fired 
• Gas fired
• Light diesel oil fired
• Electric heater
• Steam heat exchanger

These are main fuels used to heat the air which thereafter used for further processes.

Direct fired HAG with blower

Steam heat exchanger

LDO fired HAG

F. D Fan (forced draft fan)

F. D fan

F. D fan is consist of a motor, shaft and a blower type casing. 

• We can see it in images.
• Material : S. S, M.S
• Size : depends on Air quality 
• Air Qty. : In M3/hr

Working :

It sucks atmospheric air by a rotor attached to it, which is driven by a specific power motor. 

Working of spin flash dryer and different components

Spin flash dryer 

A spin flash dryer consist of mainly these components See mentioned below :
These are as per process wise sets under:

1. F.D Fan (Forced Draft Fan)
2. HAG (Hot Air Generator)
3. Spin table
4. Vertical Duct
5. Cyclone
6. Bag filter OR Scrubber
7. I.D Fan (Induced Draft Fan) (Exhaust blower)
8. Chimney