The meltblown process requires a large amount of hot air. The compressed air output from the air compressor is dehumidified and filtered, then sent to the air heater for heating, and finally to the meltblown die assembly. The air heater is a pressure vessel and must resist oxidation from high-temperature air, so the material must be stainless steel.
Meltblown Fabric Heater
The meltblown process requires a large amount of hot air. The compressed air output from the air compressor is dehumidified and filtered, then sent to the air heater for heating, and finally to the meltblown die assembly. The air heater is a pressure vessel and must resist oxidation from high-temperature air, so the material must be stainless steel. The heating element of the air heater is a stainless steel electric heating tube. Multiple baffles are arranged in the heater cavity to prolong the residence time of air in the cavity, thereby improving heat exchange efficiency. Appropriately increasing the number of heating tubes and increasing the installed power of the air heater can shorten the startup heating time of the production line. The meltblown process requires high temperature control accuracy for the drawing air heater, and the drawing air temperature must be stable within ±1°C.
Application Fields of Heaters: Air heaters are widely used. Commonly called air heaters, they can be further classified into many types based on the heated gas, such as air heaters and hydrogen heaters. These can all be called pipeline gas heaters. *Especially due to the current epidemic prevention and control needs, the demand for masks and other medical protective supplies has surged. Pipeline air heaters are widely used by meltblown nonwoven fabric manufacturers for meltblown fabric heating.* Pipeline heaters have been widely used in aerospace, weaponry, chemical industry, and many scientific research and production laboratories. They are particularly suitable for automatic temperature control and high-flow high-temperature combined systems and accessory tests. Air electric heaters have a wide range of applications: they can heat any gas, producing hot air that is dry, non-conductive, non-combustible, non-explosive, non-corrosive, non-polluting, safe, and reliable, with rapid heating of the heated space (controllable).
1. Operating Principle of Meltblown Fabric Air Heater
In the meltblown system, most use electrically heated air heaters. Inside the heater shell made of stainless steel, a large number of stainless steel electric heating tubes are installed. When energized, the tubes heat up and exchange heat with the airflow from the fan, transferring heat to the airflow, thus producing the high-temperature drawing airflow required by the process.
2. Energy-Saving Principle of Meltblown Fabric Air Heater
(1) Reasonably design airflow and temperature rise. The power of the meltblown fabric air heater is determined based on airflow and temperature rise calculations. Under the premise of meeting the requirements, excessive airflow and temperature rise should not be used, as they directly cause excessive power consumption and increase energy consumption.
(2) The surface of the meltblown fabric air heater should be insulated. Most users only insulate the pipeline at the outlet of the electric heater, but do not insulate the surface of the electric heater itself. Comparative data show that adding insulation to the surface of the electric heater can reduce energy consumption by 5% to 10%. Long-term operation results in significant energy savings. Users should add insulation to the pipeline and also to the air electric heater.
Meltblown Fabric Heater
