Large-scale air heater is an electric heating device which mainly heats air flow. The heating element of the air heater is a stainless steel electric heating tube, and the inner cavity of the heater is provided with a plurality of baffles (guide plates) to guide the gas flow direction, thus prolonging the residence time of the gas in the inner cavity, fully heating the gas, uniformly heating the gas and improving the heat exchange efficiency. Stainless steel heating tube, the heating element of air heater, is made by filling heating wire in seamless steel tube, filling magnesium oxide powder with good thermal conductivity and insulation in the gap, and then shrinking the tube. When the current passes through the high-temperature resistance wire, the generated heat diffuses to the surface of the heating tube through the crystalline magnesium oxide powder, and then is transferred to the heated air to achieve the purpose of heating.

The air heater is an electric heating device, which installs a heating tube in a cylindrical heat preservation container to heat the gas.

The invention has the characteristics of high heating speed, good thermal insulation performance and high heating temperature.

Air heaters are usually used to heat air, nitrogen and other gases, which can be heated to the required temperature in a short time.

The specific size and heating time are customized according to customer requirements.