There are two main types of heating methods for powder coating equipment, namely direct heating and indirect heating. Let's take a closer look at the characteristics of these two heating methods.
Direct heating method:
The direct electric heating spiral fin type is characterized by uniform temperature in the furnace and strong adaptability of the workpiece. The solid state relay is used to adjust the temperature, and the temperature deviation in the furnace is small. The heating time is long, the equipment power is large, and the heating process is heated by hot air, the curing process may cause secondary pollution of dust, and the furnace occupies a large area.
Advantages: The heating rate is fast, the heat energy conversion rate of the powder coating equipment is high, the furnace temperature control adopts proportional adjustment control, and the temperature control deviation in the warm furnace is small. Because the burner flame burns directly in the combustion chamber, the curing process is easy to cause dust. and secondary pollution of exhaust gas.
Indirect heating method:
Divided into fuel oil and gas. The characteristics of the indirect combustion heating method require a heat exchange device, and the flame of the burner burns in the hearth of the heat exchanger, so the material of the heat exchanger should be made of heat-resistant stainless steel. It will not cause secondary pollution of dust and waste gas during the curing process, the temperature is uniform, and the temperature control can be controlled by two-stage fire control and proportional adjustment control.
