The working principle of the heating tube: The heating tube is a tubular electric heating element composed of a metal tube, a spiral resistance wire, and crystalline magnesium oxide powder with good thermal conductivity and good insulation. The high temperature resistance wire is evenly distributed in the high temperature resistant stainless steel seamless tube. The gap is densely filled with crystalline magnesium oxide powder with good thermal conductivity and insulation properties. This structure is not only advanced, high thermal efficiency, but also generates uniform heat. When a current flows through the high-temperature resistance wire, the heat generated will pass through the crystalline magnesium oxide powder. Diffuse to the surface of the metal pipe, and then transfer to the heated part or the air to achieve the purpose of heating.
Features of heating tube:
1. Most of the hot air circulates in the box, with high thermal efficiency and energy saving.
2. It has a wide range of applications and can dry various materials. It is a general-purpose drying equipment.
3. The whole machine has low noise and stable operation. Automatic temperature control, easy installation and maintenance.
4. It has the characteristics of high thermal efficiency, long service life, high mechanical strength, convenient installation, safety and reliability.
5. Using the effect of forced ventilation, there is an adjustable air distribution plate in the box, and the material is dried evenly. The heat source can be steam, hot water, electricity, far infrared, and a wide range of choices.
Heating tube application:
It is suitable for heating air, oil, water, chemical medium, hot pressing mold, melting salt, alkali and low melting point alloy, etc.
How to choose a heating tube:
1. When buying, ask the manufacturer first about the internal material of the heating tube:
The two most important materials inside the heating tube are insulating powder and alloy wire. Insulation powder, poor ones will use quartz sand, good ones will use insulating modified magnesium oxide powder; in addition, alloy wires, generally iron-chromium-aluminum, can be made of nickel-chromium alloy wires according to the requirements and grades of pipe production.
2. Determine the power of the heating tube according to the working environment:
The power setting is mainly for dry heating electric heating tubes and liquid heating. For dry heating, a one-meter-long tube is generally used for 1KW, and a one-meter-long tube is generally used for 2-3KW, and the maximum is not more than 4KW.
3. Choose the heating tube material according to the working environment:
The working environment is generally divided into dry heating and liquid heating. If it is dry firing, such as for ovens and duct heaters, it can be made of carbon steel or stainless steel 304. If it is heating liquid, if it is water, use electric heating tube. This stainless steel is generally made of stainless steel 304. If it is oil, it can be made of carbon steel or stainless steel 304. If it has weak acid and alkaline liquids, stainless steel 316 can be used. If there is strong acid in the liquid, stainless steel 316, polytetrafluoroethylene or even titanium pipe should be used.
4. Choose the shape of the heating tube according to the customer's electric heating equipment:
The shape of the stainless steel heating tube is ever-changing, the simplest is the straight rod, the U-shaped and then the special-shaped. For specific situations, a heating tube of a specific shape is used.
5. Determine the wall thickness of the heating tube according to the usage of the customer's heating tube:
Generally, the wall thickness of the heating tube is 0.8mm, but according to the working environment of the heating tube, such as the case of high water pressure, it is necessary to use a seamless stainless steel tube with a thicker wall to make the heating tube.
Therefore, it is necessary to have certain relevant knowledge to purchase good heating pipes. The author recommends to you a good reputation company-YIWU JINBAO HEATING PRODUCTS FACTORY
