The basic requirements for installing electric heating tubes are as follows

The basic requirements for installing electric heating tubes are as follows

The installation of electric heating tubes also requires knowledge. High quality electric heating tubes can also affect their lifespan and even directly lead to damage when installed improperly. A more durable heating tube not only depends on its own quality, but also on its installation and placement.

1. There are three installation methods for wire shaped electric heating pipes: corrugated, spiral, and strip shaped electric heating pipes. In terms of service life, the wire shaped corrugated type is the best, followed by the strip shaped corrugated type, and the wire shaped spiral type is the worst. The corrugated wire shaped electric heating tube has the best heat exchange conditions, and even if the surface load is selected higher, its service life is longer, thus saving the material and maintenance time of the electric heating tube.

2. Ensure even temperature distribution in the furnace. In large medium temperature and high-temperature furnaces that mainly rely on radiative heat transfer, it is best to install electric heating tubes on the top and door of the furnace, in addition to installing components on the furnace wall and bottom. At the same time, in areas with high heat loss in the furnace, near the furnace door hole, and near the discharge port of the vibrating bottom furnace, more electric heating pipes should be installed. When the furnace height is very low, electric heating tubes are often arranged at the bottom and top of the furnace.

3. Efforts should be made to minimize radiation shielding between electric heating tubes and between them and the supporting bricks on the furnace wall. The installation position of the electric heating tube should make it easy for heat to be transferred to the workpiece without causing local overheating of the workpiece.

4. The support for the electric heating tube of the medium temperature furnace should be made of high aluminum products. High temperature furnaces with a furnace temperature above 1000 ℃ should use relatively pure aluminum oxide products, while low temperature furnaces can use general clay products. The content of iron oxide in refractory products should be small, and asbestos, slag cotton, water glass, etc. should not come into contact with electric heating tubes. Due to the formation of fusible eutectic with the electric heating tube, the components can burn out, and the oxidation film layer of the electric heating tube can be damaged, causing accelerated oxidation and damage to the electric heating tube.

Www.superbheater.com