The K-S Paddle Dryer is indirectly heated with steam or circulated thermal fluid (hot oil). This provides for high energy efficiencies and low off-gas volumes. Heat transfer mediums of up to 750°F can be used. Hot sweep gas can be employed to prevent condensation in the vapor space or downstream of the dryer. Indirect Drying to low moistures or residual solvents levels of 10 ppm or lower requires uniform heating and residence time. The K-S Paddle Dryer allows you to reach these objectives with a continuous process. The K-S Paddle Dryer provides a reliable and efficient method for drying slurry, filter cakes and centrifuge concentrates. Vacuum designs can remove water or organic solvents at reduced temperatures.

Heating

Heat a process mass for melting, cooking, pasteurization, roasting, or reacting. The heating medium can be steam, circulated thermal fluid, or hot water. The two-zone design allows for two distinct temperature zones.

Cooling

Remove heat from a process mass with cold water or thermal fluid (glycol, down to -40 °F). Cooling can be done in a controlled moisture-free environment. The two-zone design allows for two distinct temperature zones.

Calcining

Calcining at temperatures up to 750 °F can be done with the K-S Paddle Dryer and Paddle Processor. Evaporation of water prior to high temperature calcining will increase the capacity of the high temperature equipment, and the thermal efficiency of the process.

Reacting

Use the K-S Paddle Dryer and Paddle Processor for catalyzing and controlling reactions, taking advantage of our capability for precise temperature and residence time. It can be used for both exothermic and endothermic reactions. A high degree of mixing allows multiple ingredients to be thoroughly mixed as part of the reacting process.

Crystallizing

Use the K-S Paddle Processor for selective polymer crystallization or crystallizing at controlled rates and temperatures.

• High thermal efficiency
• Heat transfer medium does not come into contact with the product.
• Gas is not used to convey the product. Off-gas flow is minimal.
• Precise control of temperature
• Uniform product quality, thorough mixing and movement of the product
• Continuous process on a once-through basis
• High heat transfer area to process volume ratio – reduced floor space
• Pre-conditioning with recycle is typically not required.
• Easy to operate, requiring minimal attention
• Safer than direct drying when processing combustible material
• Simple durable design for easy and low maintenance
• Enclosed process contains odors and hazardous materials

• Heat transfer areas from 20 to over 3000 square feet (5.6 to over 279 square meters) per dryer
• Heated with steam or circulated thermal fluid (hot oil)
• Cooled with water or water-glycol mixtures
• A two-temperature-zone design is available
• Design, construction, and stamping per ASME Code or PED
• Adjustable operating level increases process flexibility (turn-down)
• Process contact surfaces of carbon steel, stainless steel or alloy
• Surface finishes to meet process requirements (from mill to electro-polished)
• Available abrasion-resistant coatings
• Inert process during operation
• Robust equipment, designed for high torque and low operating speed
• Shafts, pillow block bearings, and drive components designed for long life under adverse conditions, ensuring long-term mechanical integrity

The Komline-Sanderson Paddle Dryer/Processor is a highly efficient, mechanically agitated, indirect heat transfer device for adding or removing heat from a process mass. Dual counter-rotating shafts with unique intermeshing wedge-shaped paddles produce intimate mixing, uniform heat transfer, a high heat transfer rate, and a self-cleaning effect. No stator bars (breaker bars) are needed. A metal wall separates the process mass from the heat transfer medium. High thermal efficiency is obtained because the heat transfer is by conduction. Very little heat is lost with an insulated dryer. The K-S Paddle Dryer transports material, regardless of its handling characteristics. Sticky, pasty materials can be transported. Pre-conditioning the feed by mixing with recycled dried product, to make it conveyable, is not required. This results in lower capital, operating, and maintenance cost. Material is conveyed through the K-S Paddle Dryer by displacement (“piston flow”). As material is added to the feed end, 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. Since the product moves by displacement, residence time is controlled by the feed rate and the overflow weir height. The K-S Paddle Dryer is designed with high torque capabilities to increase its process flexibility. Extra torque keeps you on-line, when upset conditions develop. Because the K-S Paddle Dryer is indirectly heated the amount of off-gas is minimal. Inerting with nitrogen is easily accomplished when required. Typically no external sweep gas is required. For certain applications sweep gas is used to increase the drying rate or to prevent condensation in the vapor outlet of a dryer. Heat tracing the cover can also be done to prevent condensation from occurring. In the K-S Paddle Cooler indirect cooling can be done in a controlled environment. Sweep gas is used to prevent condensation from occurring. 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/processor, or a complete system.

A successful plant depends on the integration of the key process units with properly selected ancillary equipment and the right facility design. Reliability, ease of operation, rugged construction, performance, and superior customer service are all hallmarks of a K-S installation. A typical system includes a feed metering device such as a variable speed conveyor or pump. Feed metering is an important part of process control. In most applications the off-gas volume is very low and at a low temperature. When sweep gas is used, K-S can integrate sweep air conditioning into the system. Safety features must be part of the system design. The K-S Paddle Dryer operates with an inert low-temperature environment. Air is not used to convey a hot product in the dryer. Off-gas can be recycled after volatiles are condensed. When necessary, explosion suppression systems or deflagration vent panels are incorporated into the dryer’s cover. Inerting of the process with nitrogen can also be accomplished with a minimal purge rate. Our vapor-tight design allows for the processing of material containing organic solvents and hazardous materials in an enclosed safe manner. Heat-sensitive materials can also be dried at low temperatures under vacuum using hot water as the heating medium.