Why can't the liquid electric heating tube be exposed to heat?

- Dec 25, 2020-

Why can't the liquid electric heating tube be exposed to heat? 

The metalized ceramic heating tube has a faster heating speed than the traditional stainless steel heating tube. Generally, when stainless steel electric heating tube is used for heating, the heating wire is first transferred to the magnesium oxide powder, and then the magnesium oxide powder is used to heat the stainless steel tube wall. In this process, the heat of the heating wire of the single-head electric heating tube has been wasted a lot, so Generally, the heating temperature of metal electric heating tubes is relatively low.  

Customers who have used the liquid electric heating tube should know that when the liquid electric heating tube leaves the liquid to dry, the surface of the heating tube will become red and black, and finally stop working and the heating tube will break. So now the heating tube manufacturer will take everyone to understand why the liquid electric heating tube can not be exposed to heat outside the liquid. The power design of the liquid electric heating tube is different from that of the dry heating tube. The power per meter of the normal liquid electric heating tube is designed to be 2-3KW, and the power per meter of the dry heating tube is designed to be 1-1.2KW (power per meter refers to Is the power that the electric heating tube can carry per meter of heating area). That is to say, the power of the liquid electric heating tube is twice that of the dry-fired electric heating tube, because the air hinders heat conduction, and the ceramic electric heating tube transfers heat directly from the heating wire to the ceramic tube, and it can be heated directly. The mold steel greatly reduces the heating time of the mold. In addition, the electric heating tube made of alumina ceramic material not only shortens the heating time of the mold as a whole, but also has a greater power density. At the same time, the mold damage rate of the heating tube 90 is reduced, and the service life of the heating tube is improved. Experts said that the new type of electric heating tube combines many advantages, and the ceramic electric heating coil has become a good helper in the domestic mold industry.


Therefore, when the heating area of the liquid electric heating tube is exposed to the air for heating, the surface temperature of the electric heating tube cannot be emitted in time, so the surface temperature of the liquid electric heating tube of the heating tube will continue to rise, so the internal temperature will follow Increase, when the internal temperature of the heating tube reaches a certain level, the resistance wire will be burned out. If the resistance wire burns out, the electric heating tube will be scrapped. The above content explains why the liquid electric heating tube can not be exposed to the outside of the liquid for heating, so dry heating cannot occur when using the liquid electric heating tube. If there is a dry heating part, please inform us in advance to reserve a cold zone in the heating tube, so that it can be Avoid shortening the service life of the liquid electric heating tube due to dry burning.

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