May 06, 2021
The air heater is an electric heating device that mainly heats the gas flow. The heating element of the air heater is a stainless steel electric heating tube, and the inner cavity of the heater is equipped with multiple baffles (baffles) to guide the gas flow direction and extend the residence time of the gas in the inner cavity, so that the gas is fully heated and the gas The heating is uniform and the heat exchange efficiency is improved. The heating element of the air heater is stainless steel heating tube, which is made by inserting electric heating wire in seamless steel tube, and the gap part is filled with magnesium oxide powder with good thermal conductivity and insulation. When the current passes through the high-temperature resistance wire, the heat generated is diffused to the surface of the heating tube through the crystalline magnesium oxide powder, and then transferred to the heated air to achieve the purpose of heating.
The melt blown process requires a lot of hot air. The compressed air output by the air compressor is dehumidified and filtered and then sent to the air heater for heating, and then sent to the melt blown die assembly. The air heater is a pressure vessel, and at the same time it must resist the oxidation of high-temperature air, so the material must be stainless steel. The heating element of the air heater is a stainless steel electric heating tube. A plurality of baffles are arranged in the inner cavity of the heater, which can prolong the residence time of air in the inner cavity of the heater and improve the heat exchange efficiency. Appropriately increasing the number of heating pipes and increasing the installed power of the air heater can shorten the heating time of the production line. The melt-blown process requires high temperature control accuracy of the drafting air heater, and the drafting air temperature is required to be stable within the range of ±1°C.
