An electric heater is a heating device that uses electricity to heat the same core by using an alternating magnetic field to mount a primary coil with more turns and a secondary coil with a smaller number of turns on the same core. The voltage ratio of the electric heater input to output is equal to the ratio of the number of turns of the coil, while the energy remains the same. Therefore, the secondary coil generates a large current under low voltage conditions and a large current passes under low AC voltage conditions, thus generating a lot of heat.
Electric heaters are used for pre-heating or secondary heating of fuel oil such as heavy oil, asphalt and clean oil. When using, it should be noted that the electric heating tube should be positioned and fixed, and the effective heating area must be fully immersed in liquid or metal solid, and empty burning is strictly prohibited. When it is found that there is scale or carbon formation on the surface of the pipe body, it should be cleaned up in time before use, so as not to affect heat dissipation and shorten the service life. When heating fusible metals or solid nitrates, alkalis, asphalt, paraffin, etc., the use voltage should be reduced first, and only after the medium is melted can it rise to the rated voltage. When heating the air, the components should be crossed and evenly arranged, so that the components have good heat dissipation conditions, so that the flowing air can be fully heated. Safety measures should be considered when heating nitrate to prevent explosion accidents.
Applicable occasions and precautions for use of electric heaters
The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media and water; The lead wire should be able to withstand the temperature and heating load of the wiring part for a long time, and excessive force should be avoided when the wiring screw is tightened. The components should be stored in a dry place, if the insulation resistance is lower than 1MΩ due to long-term placement, it can be dried in an oven at about 200 °C, or reduce the voltage and energize heating until the insulation resistance is restored. The magnesium oxide powder at the outlet end of the electric heating pipe can avoid the infiltration of pollutants and moisture in the place of use to prevent the occurrence of leakage accidents.
China has become the world's electric heater products use of the country and has become the world electric heating industry base, the world's buyers will target procurement in China, huge market demand for manufacturers and machinery, materials, components application equipment manufacturers to provide a broad space for development. After decades of development, China's electric heater industry has become a basic and key industrial and civil technology as a direct heat energy supply method. With the rapid growth of global economic development, the pace of industrial development and urban construction continues to accelerate, which has brought unlimited business opportunities to the electric heating industry.
