What kinds of heating tubes are there? The heating tube is made of metal tubes (including stainless steel and red copper tubes), and spiral electric heating alloy wires (nickel-chromium, iron-chromium alloy) are uniformly distributed along the central axis of the tube. The gaps are filled and compacted with magnesia sand with good insulation and thermal conductivity. , Both ends of the nozzle are sealed with silica gel. This metal-clad electric heating element can heat air, metal molds and various liquids.
Common types of heating tubes include: fin heating tube, flange heating tube, titanium heating tube, Teflon, quartz heating tube, radiant heating tube, etc. The following is a detailed introduction.
fin heating tube
Finned heating tube is a kind of consuming electric energy converted into heat energy to heat the material to be heated. During work, the low-temperature fluid medium enters its input port under pressure through the pipeline, and takes away the high-temperature heat energy generated by the electric heating element along the specific heat exchange channel inside the electric heating vessel, using the path designed by the principle of fluid thermodynamics, The temperature of the heated medium is increased, and the outlet of the fin heating tube obtains the high-temperature medium required by the process. The finned tubular electric heating element is wound with metal fins on the surface of the common element. Compared with the common element, the heat dissipation area is enlarged by 2 to 3 times, that is, the allowable surface power load of the fin element is 3 to 4 times that of the common element. . As the length of the element is shortened, its own heat loss is reduced. Under the same power condition, it has the advantages of fast heating, high thermal efficiency, long service life, small heating device, and low cost. It can be installed in blowing ducts or other heating occasions with static and flowing air.
flange heating pipe
Flange heating tube (also called plug-in electric heater): U-shaped tubular electric heating element is used. According to the design specifications of different heating media, it is assembled on the flange cover according to the power configuration requirements and inserted into the material to be heated. When the heating element is working The large amount of heat emitted is conducted to the heated medium to increase the temperature of the medium to meet the required process requirements. When the medium temperature reaches the set value required by the process, the control system adjusts the output power of the electric heater after PID calculation according to the temperature sensor signal, and realizes temperature control of the resistive load of the heating element. Make the temperature of the medium uniform and meet the required requirements; when the heating element is overheated or the liquid level is low, the interlocking protection device of the heating element immediately cuts off the heating power to prevent the heating element from burning out and prolong the service life. Flange heating pipes are mainly used for heat preservation and heating of materials in various storage tanks, containers, and fuel tanks in the petroleum, chemical, food, and machinery industries. The connection method can adopt flange type or threaded end face seal.
Titanium heating tube
The titanium electric heating tube is made of titanium tube as the shell, and the electric heating alloy wire is evenly distributed along the central axis of the tube. The gap is filled and compacted with magnesia sand with good insulation and thermal conductivity. The two ends of the tube are sealed with silica gel or ceramics. This kind of metal electric heating Highly corrosive liquid for components. Titanium heating tube has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation and long service life. It is widely used in various highly corrosive liquids. Titanium has a small specific gravity and is widely used in heating water, nitrate solutions, acid solutions, and alkaline solutions. Practice has proved that titanium has high efficiency and long life in the production and application of anti-corrosion equipment. In the application of electroplating equipment, it does not affect the performance of the plating solution. Greatly improve the efficiency of the electroplating industry. The effective length of the heating element must be completely immersed in liquid for use.
Teflon
Teflon heating tube is a new type of electric heating tube with strong corrosion resistance, which is used for heating various corrosive liquids. It has excellent aging resistance and good bending performance, and adopts a low surface load design. The joint adopts fully enclosed anti-acid and alkali, non-heating section and overheating safety protection system is completely customized according to customer needs. The intactness ensures that the heater is not easy to burn out, has a long service life, is fully sealed, does not corrode, does not leak electricity, has grounding protection, and is safe and reliable. The applicable temperature is below 110°C. The anticorrosive Teflon heating tube has the advantages of high thermal efficiency, energy saving and power saving, and high cost performance. It can be designed in a variety of structural forms, such as spiral type, L type, U type, W type, mosquito coil type, combined type, etc. It has been recognized by many listed companies and has been a long-term supplier of mosquito-repellent-type Teflon electric heaters. We can undertake non-standard products, in terms of voltage, power, size and product shape, and wiring methods, we can let engineers design according to customer needs. Welcome to customize and produce with drawings and samples.
Quartz heating tube
Quartz heating tube, the most commonly used is carbon fiber quartz heating tube.
Carbon fiber heating tube, also known as carbon fiber heating tube, infrared heating tube, infrared heating tube, carbon fiber infrared heating tube, carbon fiber infrared heating tube, etc. It is to place a carbon fiber filament in a quartz tube, vacuum and seal the tube, and apply a voltage to the carbon fiber filament to make the carbon fiber filament generate heat. The company's products adopt imported carbon fiber heating elements, which have the advantages of large power margin, high temperature resistance, strong high heat capacity, long service life, and power can be adjusted at will.
Radiant heating tube
radiant heating tube is an electric heating element enclosed in a protective sleeve and energized to generate heat. The sleeve indirectly radiates heat to the furnace lining and the workpiece to be processed. It is widely used in various heating furnaces in the heat treatment industry. The electric heating alloy material used in the radiant heating tube should have a high resistivity and a high electric heating conversion rate. Because the radiant tube is placed in the sleeve, the heat transfer process is different from the general exposed electric heating element, and its heat shield is large. The temperature of the element must be controlled during the heating process to prevent the element from overheating. When the radiant tube is closed and heated, the surface temperature of the electric heating element is about 100℃-150℃ higher than the furnace temperature. Therefore, when selecting materials, it is necessary to analyze the furnace temperature, temperature and atmosphere in the furnace, and select the correct heating material.