Electric heating tube (also known as heating element or heating rod) is a device that converts electrical energy into thermal energy, widely used in industrial heating applications. Below are its main features and structure:
Structure and Materials
The electric heating tube consists of a stainless steel or copper metal tube as the outer shell, filled with crystalline magnesium oxide powder (serving both insulation and thermal conduction functions), and wound with a spiral resistance wire. Its working principle involves generating heat through electric current passing through the resistance wire, which is then conducted via the magnesium oxide powder to the metal tube surface and transferred to the heated medium. ?
Application Range
Primarily used for heating air, oil, water, chemical media, molten metals, and low-melting-point alloys, it is suitable for applications in chemical processing, food processing, pharmaceuticals, and industrial equipment (such as nitrate tanks, acid-alkali tanks, melting furnaces). ?
Key Features
?Efficient Heat Conduction?: Utilizes magnesium oxide insulation material, achieving thermal efficiency of over 90% with uniform heating. ?
Long Lifespan?: Industrial-grade products typically have a service life exceeding 10,000 hours. ?
Safety Design?: Requires the heating zone to be fully immersed in the medium, prohibits dry firing, and necessitates grounding protection. ?
Precautions
Regular removal of surface carbon deposits or scale is necessary to maintain efficiency. ?
1. Operating voltage should not exceed 1.1 times the rated value, and ambient humidity should be kept ≤95%.