What are the causes of damage to the heater of the electric air duct?

Electric heater is an international popular electric heating equipment. It is used to heat, heat and heat the liquid and gaseous media of the flow. When the heating medium is under pressure, the heating chamber is heated through the electric heater, and the huge heat generated by the working of the electric heating element is uniformly carried out by using the fluid thermodynamics principle, so that the temperature of the heated medium reaches the user's technological requirement.

The fluid explosion-proof electric heater is a kind of electric energy conversion to heat energy to heat the material to be heated. In the work of low temperature fluid through a pipe under pressure into the input port, along the electric heating container specific heat flow path using fluid thermodynamic principle, take heat energy generated in the heating element, the heating medium temperature, high temperature medium electric heater export process requirements. The electric heater internal control system according to the automatic regulation of the heater power output temperature sensor signal output port, the output port of the uniform medium temperature; when the heating element overheating, overheating protection device independent of the heating element immediately cut off the heating power, heating the material to avoid overheating caused by coking, metamorphism, carbonization, leading to severe fever element burn, prolong the service life of the electric heater.

There are five main reasons for the damage of electric heater.

In the case of disconnection: disconnection, such as electric heater temperature control by the outlet temperature control, sensor signal can not provide the correct signals always require heating, electric heater is becoming increasingly hot, if the work temperature sensor, can cut off the power supply, if the temperature sensor does not work, then either the heating element or container burned, cracking and melting no matter what happened, and in explosion cases are likely to have unintended consequences.

The position of the over temperature sensor is incorrect: if the sensor position is not heated on a loop of the electric heater, the other circuit is heating, and the over temperature sensor can not detect the correct temperature or hundreds of times later.

The connection of the overtemperature sensor is incorrect: when the multiple electric heaters are used together on the same pry block, the wires may be mistaken and crossed. For example: there are three parallel electric heater heating gas, 1# and 2# in the operation of the 3# heater heater, no, if the super heater and temperature sensor 2# 3# heater cross misconnection, such as a sudden stop flow, the 3# sensor can not always turn off the 2# heater, the heater finally burned out.

Heating element: many cracking heat exchanger factory has invested a lot of experience on the tube cracking of shell and tube heat exchanger, however, cracking of the electric heater element, there are few papers, the reason is that the heating element filled with magnesium oxide solid, can crack in high pressure situation can also be made to the magnesium oxide Xianqiang, cause electrical leakage.

Short circuit: high temperature magnesium oxide is good thermal conductive materials and insulation materials, and magnesium oxide to moisture absorption caused by reduced electrical insulation, moisture absorption because of moisture in the environment or for a long time or a long time cover wiring and so on, such as electric circuit breaker, not timely cut off, will penetrate the heating element.