A rotary heat exchanger is a heat exchange device used for energy and heat transfer. It typically includes a rotating heat transfer medium that can be used to capture waste heat from the discharged exhaust gas and transfer it to incoming fresh air or other media. The following is the working principle and purpose of a rotary heat exchanger:

Working principle:

1. Rotating medium: The rotary heat exchanger includes a heat transfer medium that rotates axially, usually composed of some metal or plastic sheets with gaps between them.

2. Exhaust gas side: The exhaust gas discharged from drying equipment or industrial processes usually contains waste heat such as high-temperature hot air and water vapor.

3. Heat transfer: When the exhaust gas passes through the rotary heat exchanger, the heat energy is transferred to the medium of the rotary wheel. The hot medium will absorb the heat energy in the exhaust gas.

4. Fresh air side: At the same time, fresh air or other media is introduced to the other side of the impeller. On this side, the thermal medium releases the captured heat energy and transfers it to fresh air, thereby heating up the fresh air.

5. Continuous cycle: The impeller rotates continuously, causing the hot medium to pass through the exhaust side and fresh air side in turns, achieving continuous heat transfer and reuse.

Usage:

1. Energy recovery: Rotary heat exchangers are used to capture waste heat from industrial processes, buildings, or mechanical equipment, and use it for heating, heating, or drying fresh air, thereby saving energy costs.

2. Air handling system: Rotary heat exchangers are widely used in ventilation, air handling, and air conditioning systems to improve the energy efficiency of the system. They help stabilize temperature and humidity within the required range.

3. Industrial drying: In the industrial field, rotary heat exchangers can be used for drying equipment to reduce energy consumption, improve drying efficiency, and improve product quality.

4. HVAC systems: In HVAC systems in buildings and commercial premises, rotary heat exchangers can be used to reuse the heat energy in the discharged air, thereby improving the energy efficiency of the system.

5. Humidity control: Rotary heat exchangers can be used to control humidity levels to maintain them within the required range, such as in laboratories, pharmaceutical industries, and food processing.

In summary, a rotary heat exchanger is an effective heat exchange device that can be used in various applications to capture and reuse waste heat, improve energy efficiency, and reduce operating costs. It has a wide range of applications in industry, construction, environmental control, and energy recovery.