Heat Recovery Exchanger

1. Exchanger Types

Plate Heat Exchanger
Compact structure with high heat transfer efficiency, suitable for low-temperature exhaust (<200°C) with minimal corrosiveness. Easy to clean, ideal for small to medium-sized dryers.
Rotary Wheel Exchanger
Transfers heat via a rotating wheel, suitable for high-flow, low-temperature-difference exhaust recovery. High efficiency, best for large-scale drying systems, but requires more space.

Exhaust Characteristics
Evaluate exhaust temperature (typically 80–200°C), flow rate, humidity, and dust content. Corrosive gases require resistant materials (e.g., stainless steel).
Heat Recovery Efficiency
Efficiency ranges from 50%–80%, depending on temperature difference and heat transfer area. Balance efficiency with pressure drop to maintain exhaust performance.
Maintenance and Cost
Plate exchangers are easy to disassemble and clean, with low maintenance costs. Rotary wheel exchangers suit continuous operation but have higher initial costs.

Plate Heat Exchanger: Used in small to medium dryers, such as in food or textile industries, for recovering low-temperature exhaust to preheat fresh air.
Rotary Wheel Exchanger: Applied in large industrial dryers, like paper or chemical material drying, for handling high-flow exhaust.