During the particle drying process, a large amount of hot air is generated. If this hot air is directly discharged, it will not only cause energy waste, but also have a certain impact on the environment. The gas air heat exchanger can recover heat from the exhaust gas by exchanging heat between the fresh air and the exhaust gas, which can be used to preheat the fresh air and reduce the energy consumption of the drying equipment.

When using an air to air plate heat exchanger, heat is transferred from high-temperature exhaust gas to low-temperature fresh air through metal plates such as aluminum foil or stainless steel foil. Due to their excellent thermal conductivity, these metal plates can effectively achieve heat transfer, and the choice of material (aluminum foil or stainless steel foil) also affects the durability and adaptability of the heat exchanger in different environments.

The working principle of a gas air heat exchanger mainly includes the following steps:

Exhaust gas flows into the heat exchanger: High temperature exhaust gas from the drying process enters one side of the heat exchanger.

Heat transfer: The heat of exhaust gas is transferred to fresh air through a metal plate made of aluminum foil or stainless steel foil. The metal plate itself does not participate in fluid mixing and only plays a role in heat transfer.

Preheating of fresh air: Fresh air flows through the other side of the heat exchanger and absorbs heat in contact with the hot metal plate, thus being preheated.

Discharging cooling exhaust gas: After transferring heat, the temperature of the exhaust gas decreases and is cooled before being discharged.