The electric heating device is mainly an air heater which is used to heat the gas flow. The stainless steel pipe electric heater used for heating the heating element electric air heater is provided with a plurality of baffle inner cavities (guide plates) to guide the flow of the gas and prolong the residence time of the gas, so that when the gas is fully heated, the gas is evenly heated to improve the heat exchange efficiency. Stainless steel heating electric heater heating air pipe elements, seamless steel pipe in the wire is charged, filled with good thermal conductivity and insulated by magnesium oxide powder heat shrinkable tube space part.
When the current can pass through the high-temperature resistance wire, the heat generated will diffuse to the surface of the heating tube by studying the crystal magnesia powder, and then transfer to the heated air system to achieve a heating purpose. Both electric air heater and compressed air heater can directly use various pipe type electric heaters, which are mainly used by enterprises to heat the required air flow from the initial design temperature control to the required air temperature, while the compressed air heater can only choose to use different pipe type electric heaters. The electric air heater can effectively use these pipe type electric heaters, and can also improve the use of air duct type electric heaters, with a higher efficiency of up to 850 ℃. It has been widely used in China's aerospace, weapon industry, chemical machinery industry, higher education institutions and many other national scientific research management and production laboratories.
Air heater is especially suitable for automatic temperature control and high temperature combination system and accessories test. In addition to over temperature protection, it is also necessary to add a combined conveying device between the fan and the heater. If the third kg / cm2 exceeds the above pressure specifications, please select the circulating electric heater. The gas heating temperature of the low-temperature heater is higher than 160 ℃; the medium temperature type is not more than 260 ℃; and the high-temperature type is not more than 500 ℃.
Under the impact of high-pressure air flow, the heating element of electric heater is made of special alloy. The mechanical properties and strength of the heater are better than that of any kind of heater. It is more advantageous to carry out experiments on air heating system and accessories for a long time. According to the operating procedures, the "strict" life span is more than 10 years. Fresh air is good for the environment. The electric heating air heater can heat the air to a very high temperature. The temperature of the shell is only about 50 ℃. The efficiency is higher than 0.9, the temperature rise and cooling speed is fast, up to 10 ° C / s, the temperature control will not appear lag phenomenon in advance, the control air temperature drift is unstable, it is very suitable for automatic control. |
