It achieves heating purposes by converting electrical energy into thermal energy. This type of heater is widely used in industries such as petroleum, chemical, electric power, textile, and food processing, mainly for heating and insulation of pipelines, reactors, containers, etc. The following is some basic information about sheathed electric heaters:
Working Principle
Sheathed electric heaters mainly consist of resistance wire (heating element), insulating material, and metal sheath. When current passes through the resistance wire, according to Joule's law, the resistance wire generates heat, which is then transferred through the metal sheath to the medium or object that needs heating.
Structural Features
Metal sheath: Usually made of stainless steel or other corrosion-resistant materials, it has good mechanical strength and corrosion resistance, protecting the internal heating elements from external environmental influences.
Resistance wire: As the heating element, selecting appropriate resistance wire material is crucial to ensure heating efficiency and extend service life.
Insulating material: Ensures electrical insulation between the resistance wire and the metal sheath, preventing short circuits.
Terminal block: Used to connect the power supply; a well-designed terminal block can improve safety and convenience of use.
Application Fields
Petroleum and chemical industries: Used for heat tracing of crude oil pipelines to prevent oil solidification; heating and insulation of chemical reaction vessels, etc.
Electric power industry: In power plants, used for heating of turbine lubricating oil systems, cooling water systems, etc.
Textile industry: Used for heating of dyeing machines, setting machines, and other equipment.
Food processing: Such as hot water supply in beverage production lines, food drying processes, etc.
Advantages
High efficiency and energy saving: Directly converts electrical energy into thermal energy with high conversion efficiency.
Precise temperature control: Can be equipped with temperature control devices to achieve precise control of heating temperature.
Easy installation: Compact structure, easy to install and maintain.
Wide applicability: Suitable for various working environments and heating needs.
Usage Precautions
Before installation and use, please read the product manual carefully to understand its technical parameters and safety operating procedures.
Regularly check the working status of the heater, including whether the resistance wire is damaged and whether the insulation performance is good.
Adjust the heating power according to actual usage conditions to avoid long-term overload operation.
For use in flammable and explosive places, explosion-proof products should be selected and strictly implemented according to relevant standards.
Sheathed electric heaters play an important role in many industries due to their high efficiency and convenience. Correct selection and use of sheathed electric heaters can not only improve production efficiency but also effectively reduce energy consumption, contributing to the sustainable development of enterprises.
