Explosion-proof electric heater is an internationally popular high-quality long-life electric heating device. It is used for heating, heat preservation, and temperature raising of flowing liquid and gaseous media. When the heating medium passes through the heating chamber of the electric heater under pressure, the fluid thermodynamic principle is used to uniformly take away the huge heat generated by the electric heating elements during operation, so that the temperature of the heated medium meets the user's process requirements. The following mainly introduces the working principle and explosion-proof principle of the explosion-proof electric heater:
I. Working principle of explosion-proof heater:
Explosion-proof electric heater is a device that converts electrical energy into heat energy to heat the material to be heated. During operation, the low-temperature fluid medium enters its inlet through the pipeline under pressure, flows along the specific heat exchange channel inside the electric heating container, following the path designed by fluid thermodynamic principles, and takes away the high-temperature heat energy generated by the electric heating elements during operation, thereby raising the temperature of the heated medium. The outlet of the electric heater obtains the high-temperature medium required by the process. The internal control system of the electric heater automatically adjusts the output power of the electric heater based on the temperature sensor signal at the outlet, so that the medium temperature at the outlet is uniform. When the heating element overheats, the independent overheat protection device of the heating element immediately cuts off the heating power supply, preventing the heated material from overheating, coking, deteriorating, carbonizing, or even burning out the heating element in severe cases, effectively extending the service life of the electric heater.
II. Explosion-proof principle of explosion-proof heater:
Explosion-proof electric heater is generally used in dangerous places where explosion may occur. Since the surrounding environment contains various flammable and explosive oils, gases, dust, etc., once they come into contact with electric sparks, an explosion may occur. Therefore, heating in such occasions requires the use of explosion-proof heaters. The main explosion-proof measure of the explosion-proof heater is that there is an explosion-proof device in the junction box of the heater to eliminate the risk of ignition by electric sparks. For different heating occasions, the explosion-proof level requirements of the heater are also different, depending on the specific situation.
