Precautions for industrial immersion heaters
Industrial immersion heaters are widely used in industry. Today, let us take a look at what are the precautions for using this heater?
1. The industrial immersion heaters is allowed to work under the following conditions:
A. The relative humidity of the air is not more than 95%, and there is no explosive and corrosive gas. (Except for explosion-proof heaters).
B. The working voltage should not be greater than 1.1 times the rated value, and the shell should be effectively grounded.
C. Insulation resistance≥1MΩ Dielectric strength: 2KV/1min.
2. The industrial immersion heaters should be well positioned and fixed, and the effective heating area must be completely immersed in liquid or metal solid, and empty burning is strictly prohibited. When it is found that there is scale or carbon on the surface of the pipe body, it should be cleaned up in time to avoid heat dissipation and shorten the service life.
3. When heating fusible metals or solid nitrates, alkalis, bitumen, paraffin etc., the operating voltage should be lowered first, and the voltage can be increased to the rated voltage after the medium is melted.
4. Safety measures should be considered when heating nitrate to prevent explosion accidents.
5.The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media, and moisture; 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 screws are tightened.
6.The heating tube should be stored in a dry place. If the insulation resistance is lower than 1MΩ due to long-term storage, it can be dried in an oven at about 200℃, or the voltage can be reduced and the insulation resistance can be heated until the insulation resistance is restored.
7.The magnesium oxide powder at the outlet end of the electric heating tube should avoid the infiltration of pollutants and moisture in the place of use to prevent leakage accidents.
