The K-S Paddle Dryer provides a reliable and efficient method for drying filter cakes and centrifuge concentrates. The K-S Paddle Dryer is indirectly heated using steam or circulated thermal fluid (hot oil). High-energy efficiencies and low off-gas volumes are characteristics of a K-S Drying System.
The K-S Paddle Dryer is an indirect heat transfer device that utilizes mechanical agitation to enhance contact with the product being dried. Dual counter-rotating shafts with unique intermeshing wedge-shaped paddles produce intimate mixing, optimize heat transfer, and provide a self-cleaning effect.
A large heat transfer area to volume ratio is achieved by the use of heated hollow paddles and a jacketed trough, through which the heating medium flows. This results in a compact machine requiring less space and having lower installation cost than alternate drying technologies.
Indirect dryers have a metal wall that separates the process mass from the heat source. High thermal efficiency is obtained because the heat from the heating medium goes directly into the process mass. As the material comes into contact with the heated trough and agitators, the process mass is heated via conduction. The insulated dryer has very little heat loss.
The K-S Paddle Dryer transports material, regardless of its handling characteristics. The dryer easily accepts feeds with a wide range of feed solids concentrations. Pre-conditioning the feed by mixing with recycled dried product, to make it conveyable is not required. This results in a safer operation and lower capital, operating, and maintenance costs.
Material is conveyed through the K-S Paddle Dryer by displacement. As material is added to the dryer, it is assimilated into the bed by the mixing action of the agitators. Hydraulic head pressure, combined with the action of the wedge-shaped paddles, pushes material around the paddles.
As sludges dry they go through a number of transitions in handling characteristics. These changes are directly related to the solids content. For example, extremely wet sludges and extremely dry sludges require substantially less torque than sludges in the plastic-sticky-phase, when high torque is required. The K-S Paddle Dryer is designed with high torque capabilities to increase its process flexibility. Extra torque keeps you on-line, even during upset conditions.
No external sweep gas is required. Exhaust gas is minimal and at a low temperature. Therefore, the volume of non-condensable gas from the dryer that may require treatment for odors is minimal.
K-S process and project engineers provide assistance at all phases of the project. Depending on your specific requirements, K-S can provide you with a dryer, or a complete system.