Electric heating tubes, also known as tubular heating elements, are heating devices that convert electric energy into thermal energy.

Structure:

1. Outer sheath: Generally made of metal materials such as stainless steel with good thermal conductivity.

2. Heating element: Helical electric heating alloy wires (e.g., nickel-chromium, iron-chromium alloys) are evenly arranged axially along the center inside the tube.

3. Insulating material: The gaps are filled with magnesium oxide powder with excellent insulation and thermal conductivity.

Working Principle: Electric current passes through the resistance wire to generate heat. The heat is transferred to the metal sheath via magnesium oxide powder and then radiated to the surrounding medium.

Features:

1. High thermal efficiency and energy saving.

2. Long service life and easy maintenance.

3. Wide application range, available for heating air, oil, water, chemical media, etc.

Applications: Widely used in pharmaceutical, chemical, food industries, heat treatment furnaces, drying equipment and other fields.