During the drying process of tea tree mushrooms and shiitake mushrooms, a stable supply of hot air is required to remove moisture, while large volumes of high-temperature, high-humidity exhaust air are continuously discharged. In conventional drying systems, this exhaust air is released directly to the atmosphere, and fresh cold air must be reheated, resulting in low energy efficiency and high operating costs.
By installing a waste heat recovery air-to-air heat exchanger between the exhaust and supply air streams, the thermal energy contained in the discharged hot air can be effectively recovered and reused to preheat the incoming fresh air. This enables high-temperature heat energy circulation within the drying system. The supply air and exhaust air remain completely separated during heat exchange, preventing moisture, odors, and contaminants from returning to the drying chamber and ensuring consistent product quality.
Under continuous high-temperature operating conditions, the air-to-air heat exchanger significantly increases the inlet air temperature, reducing the energy demand of electric heaters, biomass burners, or gas-fired systems. For large-scale or long-hour drying operations, the energy-saving effect is particularly evident.
The waste heat recovery system features a compact structure, flexible installation, and easy integration with existing drying rooms without altering the original process. It operates reliably with low maintenance requirements, helping to reduce energy consumption, minimize heat loss, and improve overall thermal efficiency, making it an ideal solution for energy-saving upgrades in mushroom drying facilities.