The working principle and classification of radiation electric heating tubes

The working principle of radiation electric heating tubes

Electric heating radiation tube is a type of device that converts electrical energy into thermal energy to heat materials that need to be heated. During the operation of the heating tube, the low-temperature fluid medium enters its input port through the pipeline under pressure, and follows a specific heat exchange channel inside the electric heating container. The fluid thermal principle of the air electric heating tube is applied to design the approach, which takes away the high-temperature thermal energy generated by the electric heating element in the air electric heating tube. This causes the temperature of the heated medium in the air electric heating tube to rise, and the outlet of the electric heating tube obtains the high-temperature medium specified in the process.

The internal control system of the electric heating tube automatically adjusts the power of the electric heating tube based on the temperature sensor data signal at the output port, so that the medium temperature at the output port of the air electric heating tube is uniform; When the heating element of the air electric heating tube overheats, the separate over temperature protection device of the heating element immediately cuts off the heating switch power to prevent the heating material in the air electric heating tube from overheating, causing coking, mold, and carbonization. In severe cases, it can cause the heating element in the air electric heating tube to burn out, and reasonably extend the service life of the electric heating tube.

Radiation electric heating tube

Classification of radiation electric heating tubes

1. Linear spiral wrapped electric heating radiation tube

This type of electric heating radiation tube is composed of a heat-resistant alloy steel sleeve and a heater, which is generally wound by a heating wire on a heat-resistant insulating ceramic tube core with spiral grooves.

2. Strip spiral wrapped electric heating radiation tube

The construction of this type of heater is mostly the same as the first type, except that the heating element uses resistance with coil inductance, and the tube core is mostly composed of several sorted tube cores. Under the same surface load, the heat transfer surface is large, and raw materials can be saved. Generally, this type of method is used for high-power point heating radiation tubes.

3. Vertical electric heating radiation tube with a zigzag cage (also known as squirrel cage type)

Its structure is to roll the heating element's electric heating wire (strip) into a "U" shape and string it into several insulated and heat-resistant ceramic support points, with a heat-resistant rod fixed in the middle. This type of radiation tube has a longer service life.