Description:The material is continuously supplied into the hopper (1) and the stored material in the hopper is continuously fed into the drying chamber (5) with the help of controlled feeder (2). The material feed inside the dryer slides on the sloper (3) in a layer and travels through the porous belt (4). The number of the belts may be increased up to n numbers as per the requirement resulting in the better output of the product and fuel efficiency. There is a presence of side skirting (13) on the side of each layer of belt which restricts the escape of air from one belt to another from the sides and thus ensuring controlled temperature in each belt. The material traveling through the belt (4) with the help of head pulley (6) and tail pulley (7) is overturned with the help of specially designed spike rollers with spikes or horizontal bars (8) so that the material comes in contact of the hot air blown ensuring maximum output. The multiple decks (MD) are provided as per the requirement one below the other in the dryer to ensure overturning and maximum exposure of air over the material surface. After passing through the belt (4) (n numbers) the dried material comes out of the drying chamber through rotary air lock (9).
The hot air generated from the heat exchanger or hot air generator (A) is supplied through a main ducting (B) to the distribution ducting (C). The damper valves (D) are provided after the distribution ducting (C) to maintain the air volume and the flow of the hot air in the internal ducting (E) located inside the drying chamber (5). The hot air comes in contact with the material passing through the porous belt (4) in the perpendicular direction. The exhaust damper valves (G) are provided at the top of the drying chamber (5) which exhausts a certain amount of the hot air with moisture and sets it free in the environment.
The remaining hot air is recycled from the top of the drying chamber through recirculation ducting (F). The hot air is re circulated though this ducting to the blower and there is a provision of using this air after it mixes with the fresh hot air supply described earlier to directly inject on the belt as per the requirement in a controlled way to ensure the fast drying of the material controlling the temperature in each belt with the help of valves.
The doctor blade and screw conveyors (10) are provided in the tail pulley (7) for the removal of the dust and the unwanted foreign particles out through the exit door (12). The electrical control panel board (11) controls,
1. Feeder speed to control the quantity of material at the input,
2. Belt speed to maintain desired retention time of material inside the drying chamber,
3. The input hot air temperature and indicates air temperature at the outlet of the dryer.
4. The drying temperature of the drying chamber.
, Claims:1. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM designed for even and uniform drying and for continuous and uninterrupted supply of the multiple free flow agro commodities for a desired output comprising of :-
• A hopper (1) and the stored material in the hopper is continuously fed into the drying chamber (5) with the help of controlled feeder (2). The material travels from the sloper (3) through the belt (4) which has side skirting (13) with the help of head pulley (6) and tail pulley (7) is overturned with the help of specially designed spike rollers with spikes or horizontal bars (8). After passing through the belt (4) (n numbers) the dried material comes out of the drying chamber through rotary air lock (9).
• The hot air generated from the heat exchanger or hot air generator (A) is supplied through a main ducting (B) to the distribution ducting (C). The damper valves (D) are provided after the distribution ducting (C) to maintain the air velocity and the flow of the hot air in the internal ducting (E) for air distribution located inside the drying chamber (5).
• The remaining hot air is recycled from the top of the drying chamber through recirculation ducting (F) to valves at each belt to control the temperature at each belt. The doctor blade and screw conveyors (10) are provided in the tail pulley (7) for the removal of the dust and the unwanted foreign particles out through the exit door (12).
• The electrical control panel board (11) controls,
1) Feeder speed to control the quantity of material at the input,
2) Belt speed to maintain desired retention time of material inside the drying chamber,
3) The input hot air temperature and indicates air temperature at the outlet of the dryer,
4) The drying temperature of the drying chamber.

2. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 comprising of a drying chamber in which a multiple bed conveyor belts are arranged horizontally above one another for the grain to be conveyed so that the material shall travel and drop from the uppermost conveyor to the next conveyor belt up to the lowermost conveyor belt.
3. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 with multiple decks / belts as per requirement for obtaining the desired output and comprising of specially designed spike rollers with spikes or horizontal bars present along the length of the belt to ensure the overturning of the material to get the maximum surface area of the material in contact with the hot air and to avoid the formation of lumps in the material.
4. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 with a network of ducting of hot air distribution to the drying chamber using the path of main ducting to distribution ducting to the internal ducting of the chamber.
5. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 with provisions of hot air distribution and re-circulation of air with the help of internal ducting to valves present at the end of each belt to control the required temperature at each belt required for the drying process in the drying chamber.
6. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 consisting of side skirting at the side of each belt which ensures that the hot air does not escape from one layer of belt to another and thus ensuring the controlled temperature in each layer of belt.
7. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 comprising of a rotary air lock system provided at the entry & exit point of the drying chamber for the control of the hot air and least heat loss.
8. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 comprising of doctor blade and screw conveyors for the removal of the dust and the unwanted foreign particles out through the exit door.
9. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1 which is designed for providing a certain air quantity, definite heat quantity & specific retention time derived as per the specific material of input for drying the same for the desired output.
10. A BELT DRYER WITH SPIKE ROLLS AND MULTI LAYER CONTROLLED AIR DISTRIBUTION SYSTEM as claimed in Claim 1, as substantially as herein described with reference to the foregoing description and the accompanying drawings.