Electric heating tubular heating element is the core component of electric heating, which directly determines the service life of the boiler. Non metallic electric heating pipe (such as ceramic electric heating pipe) should be selected as far as possible, because it is load-resistant, long-life, and water and electricity separation structure, and the boiler will never leak electricity. Working principle electric heating adopts metal tubular electric heater to heat water, so that the electric energy can be directly converted into heat energy (producing hot water or steam). There is no need to convert chemical energy into heat energy by combustion, and there is no need to supply air and fuel required for combustion. It will not emit harmful gases and ash, which fully meets the requirements of environmental protection. Electric heating can be divided into ks-d electric heating boiling water boiler, cldr (cwdr) electric heating hot water boiler, LDR (WDR) electric heating steam boiler, etc. according to the function of electric heating, the electric heating heat pipe of electric boiling water boiler should be positioned and fixed, and the effective heating area must be immersed in liquid or metal solid, and no empty burning is allowed. When the scale or carbon is found on the surface of the pipe body, it should be cleaned and reused in time to avoid affecting the heat dissipation and shortening the service life. When heating fusible metal or solid nitrate, alkali, asphalt, paraffin, etc., the electric heating pressure should be reduced first, and then the rated electric heating pressure can be increased after the medium is melted. When heating the air, the elements should be arranged in a cross and uniform way, so that the components have good heat dissipation conditions and the air flowing through can be fully heated. Safety measures should be considered when heating nitrate to prevent explosion accidents. The wiring part shall be placed outside the thermal insulation layer to avoid contact with corrosive and explosive media and water; the lead wire shall be able to withstand the temperature and heating load of the wiring part for a long time, and excessive force shall be avoided when the wiring screws are tightened. The components should be stored in a dry place. If the insulation electric heating resistance is lower than 1m Ω for a long time, it can be dried in the oven at about 200 ℃, or reduce the electric heating pressure and turn on the explosion-proof electric heating heater until the insulation electric heating resistance is restored. The magnesia powder at the outlet end of the electric heating heat pipe can avoid the penetration of pollutants and moisture in the place of use, so as to prevent the occurrence of leakage heating accidents. Electric heating is mainly composed of boiler body, electric control box and control system. It is characterized by environmental protection, clean, pollution-free, noise-free, fully automatic. With the reduction of limited energy and substantial price rise, electric heating as a new boiler equipment is more and more recognized by everyone.