The electric air heater is the main electric heating equipment for heating gas flow. The heating element of electric air heater is stainless steel electric heating tube. The inner cavity of the heater is equipped with multiple baffles (guide plates) to guide the flow direction of gas, prolong the residence time of gas in the inner cavity, so that the gas is fully heated, the gas is heated evenly, and the heat exchange efficiency is improved. The heating element of the air heater is stainless steel heating pipe. The seamless steel pipe is filled with electric heating wire, and the gap part is filled with magnesia powder with good thermal conductivity and insulation.
The output of air compressor is after dehumidification and filtration, the compressed air is sent to the air heater for heating, and then sent to the melting head assembly. The air heater is a pressure vessel and can resist oxidation of high temperature air, so the material must be stainless steel. The heating element of air heater is stainless steel electric heating. A plurality of baffles are arranged in the heater chamber, which can prolong the residence time of air in the heater chamber and improve the heat exchange efficiency. The start-up time of the production line can be shortened by properly increasing the number of heating tubes and increasing the installation power of air heater. The temperature control accuracy of the ventilated air preheater is high, and the ventilation temperature is required to be stable within 1 ° C.
When passing through the high-temperature filament current, the heated heat is formed by the crystallization of magnesium oxide powder and the diffusion generated on the surface of the heating tube, and then transferred to the air to achieve the purpose of heating. At high operating temperatures, efficiency and performance characteristics are important, the type of insulating material analyzed can help buyers choose the appropriate application for their air heaters. The following two aspects should be considered when choosing the appropriate power level based on the air heater. Only when the heater meets these two conditions is safe and stable. Under operating conditions, heat enough to maintain the temperature of the medium. From the initial state, a predetermined time is required to realize the temperature set by the heating medium.
The technical development of the electric air heater is characterized by its ability to heat China's air to a very high temperature, up to 450 ℃, and the shell temperature data is only about 50 ℃. The highest efficiency is above 0.9. The heating and cooling rate can reach 10 ℃ / s, which is fast and stable. It will not lead to the phenomenon that the controlled air environment temperature is ahead of time and lag, and the working temperature can be controlled to drift indefinitely, which is very suitable for students' automatic management and control. Because its heater is a special alloy research material, it has better mechanical performance and strength than any other heating element under the impact of high-pressure air flow, which is superior to the test results of the system and accessories that we need to continuously change the air heating for a long time. When it does not violate the national operation regulations, it is durable and can be used for decades. The air is clean and the volume is small. |
