An electric air heater is an electric heating device that mainly heats the gas stream. Heating from the initial temperature to the required air temperature, up to 850°C. The heating element of the electric air heater is a stainless steel electric heating tube. The inner cavity of the heater is provided with a plurality of baffles (deflectors) to guide the gas flow and prolong the residence time of the gas in the inner cavity, so as to fully heat the gas and make the air flow. The gas is heated evenly and the heat exchange efficiency is improved. The heating element of the electric air heater is a stainless steel heating tube, which is made by inserting electric heating wires into the seamless steel tube, filling the gap with magnesium oxide powder with good thermal conductivity and insulation, and then shrinking the tube. This structure is not only advanced, but also has high thermal efficiency and even heat generation. 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 transfers to the heated air to achieve the purpose of heating.
Technical features:
1. It can heat the air to a very high temperature, up to 850 °C, and the shell temperature is only about 50 °C.
2. High efficiency: up to 0.9 or more.
3. The heating and cooling rate block can reach 10℃/S, and the adjustment is fast and stable. The controlled air temperature will not lead and lag, which will make the temperature control drift indefinitely, which is very suitable for automatic control.
4. Good mechanical properties: Because its heating element is a special alloy material, it has better mechanical properties and strength than any heating element under the impact of high-pressure air flow. System and accessory tests are more advantageous.
5. It is durable and has a service life of up to several decades when it does not violate the rules of use.
6. Clean air and small size
The scope of application of electric air heaters:
Electric air heaters are widely used heaters. We commonly call them electric air heaters. In fact, they can be subdivided into many types according to different heating gases. The common ones are nitrogen heaters and hydrogen heaters. . These can also be referred to as ducted gas heaters. The electric air heater can be used in a wide range: it can heat any gas, and the hot air produced is dry, moisture-free, non-conductive, non-flammable, non-explosive, non-chemically corrosive, non-polluting, safe and reliable, and the heated space heats up quickly ( controllable). It has been widely used in many scientific research and production laboratories such as aerospace, weapon industry, chemical industry and institutions of higher learning. It is especially suitable for automatic temperature control and large flow high temperature combined system and accessories test.
