Introduction
The TK-D Series Drum Dryers/Coolers are an advanced version of the Allgaier Series TK and TK+ Dryers/Coolers, offering combined drying and cooling with efficient heat recovery. This innovation is particularly beneficial for industries requiring low solid temperatures post-drying, such as construction and minerals.

Specifications and Features
The TK-D system is designed with a single-shell drum, eliminating contact points between the cooling dry material and the hot inner drum. This design allows the output of low-temperature dried solids close to ambient temperature or the temperature of the cooling air used.

Advantages
- Efficient heat recovery leading to energy savings.
- Capability to achieve cooled solids temperatures of 55°C to 60°C, and in some cases, as low as 30°C to 40°C.
- Separate extraction and dedusting of exhaust air streams from drying and cooling zones.
- The warm, dry, and dedusted cooling exhaust air can be reused as preheated drying air.

Process Control
The system allows for independent process controls between the solid and gas streams, enabling:
- Co-current or counter-current flow drying.
- Counter-current or co-current flow cooling.
This flexibility allows for efficient high-temperature processes followed by cooling.

Conclusion
The TK-D Series Drum Dryers/Coolers provide a significant advancement in drying and cooling technology, offering energy efficiency and flexibility in process control, making them suitable for various industrial applications.