Electric heating element is a kind of consumption of electrical energy converted into thermal energy. The electric heater internal control system automatically adjusts the electric heater output power according to the temperature sensor signal of the output port, so that the medium temperature of the output port is uniform; when the heating element is overheated, the heating element is The independent overheat protection device immediately cuts off the heating power supply to avoid coking, deterioration and carbonization caused by overheating of the heated material. In severe cases, the heating element is burnt out, effectively extending the path of the electric heater using the fluid thermodynamic principle, and taking away the electric heating element. The high-temperature heat energy generated increases the temperature of the heated medium, and the electric heater outlet obtains the high-temperature medium required by the process. The life is to heat the material to be heated. During operation, the cryogenic fluid medium enters its input port under pressure through a pipe, along the specific heat exchange flow path inside the electric heating vessel.
In an electrically heated heating medium, different media have different characteristics, such as water (oxidation), some chemical media (acid |, alkali corrosion), molten salt (chloride ion corrosion), etc. There are different requirements for the selection of materials when heating the casing. The materials for the electric heating housing are: carbon steel, stainless steel (corrosion resistant), copper (good plasticity and thermal conductivity), titanium, tetrafluoroethylene, and the like. In addition, the heating temperature conditions have certain influence on the selection of materials. Generally, the heat resistance temperature of stainless steel 304 is 600 ° C. When the heating temperature reaches 800 ° C, it is necessary to select stainless steel 316 or 316L, when it reaches 1000 degrees, It is necessary to choose stainless steel 310S to ensure the service life of electric heating. The reason why electric heating can generate heat, electrothermal alloy wire is indispensable, that is, the resistance wire we usually know. When the electric heating is heated, the temperature is very high. Therefore, nickel-chromium-aluminum with high strength and high heat resistance is selected. In the detection of electric heating, a breakdown voltage of 1800V is required to ensure the uniformity of the resistance wire and ensure electric heating. The heating and heating is to put the electric heating element into the metal tube and lead it out with the extraction rod. The void portion is closely filled with the crystalline magnesium oxide powder with good heat resistance, thermal conductivity and insulation, and the thread for fixed installation is added at the tail. Sleeve and sealed porcelain head, and finally electric heating elements processed by other processes.