Is the surface of the heating tube charged?

Is the surface of the heating tube charged?

Since we all know that the heating strip of the heater is charged, is the surface of the heating tube also charged? The answer is negative.

Electric heating tubes are widely used for heating liquids due to their non charged surface. So, why is the surface of the electric heating tube not charged? This is because the gap between the heating wire and the heating tube shell is usually filled with powder, and the filled magnesium oxide powder has insulation and thermal conductivity.

How can electric heating tubes keep warm without absorbing moisture?

From the second question, it can be seen that due to the presence of insulating fillers, the surface of the electric heating tube is not charged. However, how to insulate the electric heating tube so that it does not absorb moisture?

1. Select high-purity modified magnesium powder (insulation filler).

The second is the correct use of electric heating tube sealing (the selection of sealing materials for electric heating tubes will be explained in detail later).

What is the difference between an electric heating tube and an electric heating wire?

The main difference between electric heating tubes and electric heating wires is that the surface of the electric heating tube is not charged, while the surface of the electric heating wire is charged.

After explaining the above reasons, I believe the problem lies in the difference between the heating tube and the electric heating wire. The heating tube has a metal sheath, mainly made of stainless steel (SUS201, 304, 321, 316, 310, etc.), copper, and carbon steel (iron).

Choose different metal coated pipes for different working environments. From this point, we can obtain a metal sheath, which is the fourth basic structure of an electric heating tube.

1. Energy consumption

The quartz heating tube is heated by a linear resistor. The carbon fiber heating tube is made of blackbody material. During the process of electric heating conversion, visible light is very low, and the efficiency of electric heating conversion exceeds 95%. Compared with heaters such as nickel chromium and tungsten molybdenum, it saves 30% energy.

2. Service life

The service life of quartz heating tubes is generally 2000-3000 hours. The service life of carbon fiber heating pipes is 5000-8000 hours.

3. Pipeline

Quartz heating tubes are easy to package, while carbon fiber heating tubes vacuum. When conducting destructive tests, the heating tube and carbon fiber heating tube should be powered on for 30 minutes, while conducting destructive tests in water. As a result, the quartz heating tube was damaged and the carbon fiber heating tube was intact. After turning on the power, it continues to work.

4. Transparency

The transparency of quartz tubes directly affects their heating. Ordinary quartz tubes are only made of quartz or mica. Carbon fiber quartz tubes have undergone refinement and dehydroxylation treatment. The hydroxyl content of quartz tubes directly affects their calorific value.

5. Environmental protection

Tungsten in quartz heating tubes is a non renewable resource, while carbon fiber filaments are a renewable and inexhaustible resource. The waste carbon fiber production line does not pollute the environment.

6. Temperature and power regulation

You can adjust the temperature and output of the carbon fiber heating tube. Can meet the equipment requirements of various industries.

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