Large scale drying equipment for linen dryers typically has air recirculation and waste heat recovery systems to improve energy efficiency and reduce operating costs. These systems typically include heat exchangers, also known as heat exchangers, used to capture waste heat from the hot air flow and reuse it. Here is some information about this type of device:

Air recirculation system: The air recirculation system in the dryer aims to reuse hot air and reduce energy consumption. Its working principle is as follows:

1. Drying process: The hot air in the dryer is used to dry wet linen or other items. This process usually heats up the air and makes it moist.

2. Air recirculation: The air recirculation system captures and filters the discharged moisture, and then directs hot air back into the drying room. This helps to improve drying efficiency as there is no need to constantly heat up new air.

Waste heat recovery heat exchanger: The waste heat recovery system usually includes a heat exchanger to capture the waste heat in the exhaust gas and then use it for preheating in the drying process. Its working principle is as follows:

1. Drying process: The exhaust gas discharged by the dryer contains high-temperature hot air flow, which is generated by the drying process.

2. Waste heat recovery: The heat exchanger (heat exchanger) is used to capture the waste heat in the exhaust gas. The heat energy in exhaust gas is transferred to the medium flowing through a heat exchanger, usually air or water.

3. Preheating during drying process: The heated medium can be used to preheat fresh air and then introduced into the drying chamber to reduce energy consumption during the drying process.

Advantages: This type of system has the following advantages:

-Energy saving: By reusing thermal energy, energy costs are reduced.

-Reducing environmental impact: reducing exhaust emissions and minimizing adverse effects on the environment.

-Improving energy efficiency: The heat exchanger improves the energy efficiency of the dryer and reduces waste.

-Reduced operating costs: Reduced energy costs, thereby improving the economic efficiency of equipment.

These systems are usually suitable for occasions that require large-scale drying or drying of linen, bedding, work clothes, and other items, such as hotels, hospitals, laundry factories, etc. By using air recirculation and waste heat recovery systems, these facilities can improve energy efficiency, reduce operating costs, and reduce environmental impact.