Common types of electric heating tubes

Finned electric heating tube

Finned electric heating tube is a kind of heat energy which is converted from electric energy to heat the material to be heated. In the work, the low-temperature fluid medium enters its input port under the pressure through the pipe. Along the specific heat exchange channel inside the electric heating vessel, the path designed by using the principle of fluid thermodynamics takes away the high-temperature heat energy generated in the work of the electric heating element, so that the temperature of the heated medium rises, and the high-temperature medium required by the process is obtained at the outlet of the finned electric heating tube. The finned tubular electric heating element is wound with metal fins on the surface of ordinary elements. Compared with ordinary elements, the heat dissipation area is expanded by 2-3 times, that is, the surface power load allowed by finned elements is 3-4 times of that of ordinary elements. Because the length of the element is shortened, the 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 volume and low cost. It can be installed in the blowing pipe or other static, flowing air heating occasions [4].

Flange electric heating pipe

Flange electric heating tube (also known as plug-in electric heater): it adopts U-shaped tubular electric heating element, which is assembled on the flange cover according to the design specifications of different heating media and the power configuration requirements. It is inserted into the material to be heated, and a large amount of heat generated by the heating element is transmitted to the medium to be heated, so as to raise the medium temperature and meet the required process requirements. When the medium temperature reaches the set point of the process requirement, the control system adjusts the output power of the electric heater according to the temperature sensor signal after PID operation, and realizes the temperature control for the resistive load of the heating element. When the heating element is over temperature or low liquid level, the interlock protection device of the heating element immediately cuts off the heating power supply to avoid burning out of the heating element and prolong its service life. Flange electric heating pipe is mainly used for thermal insulation and heating of various storage tanks, containers and materials in oil tanks in petroleum, chemical, food, machinery and other industries. The connection mode can be flange type or threaded face seal [1].

Titanium electric heating tube

Titanium electric heating tube is a kind of high corrosive liquid, which takes titanium tube as shell and distributes electric heating alloy wires uniformly along the central axis of the tube. The gap is filled and compacted with magnesia with good insulation and thermal conductivity. Both ends of the tube orifice are sealed with silica gel or ceramics. Titanium electric heating tube has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safe and reliable, easy installation, long service life and so on. It is widely used in various high corrosive liquids. Titanium has a small proportion, and is widely used in heating water, nitrate solution, acid solution and alkali solution. Practice has proved that titanium has high efficiency and long service life in the production and application of anti-corrosion equipment, and does not affect the plating solution in the application of electroplating equipment, which can greatly improve the efficiency of electroplating industry. The effective length of the heating element must be immersed in the liquid.

Teflon

Teflon electric heating tube is a new type of electric heating tube with strong corrosion resistance, which is used for heating all kinds of corrosive liquids. It has excellent aging resistance and good winding performance, and adopts low surface load design. The joint adopts fully enclosed acid and alkali proof, non heating section and overheat safety protection system, which is completely customized according to the needs of customers. The heater is not easy to burn, long service life, fully sealed, non corrosive, non leakage, with grounding protection, safe and reliable. The suitable temperature is below 110 ° C. The anti-corrosion Teflon electric heating tube has the advantages of high thermal efficiency, energy 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 repellent incense type, combined type, etc. Has been recognized by many listed companies, and as a long-term supplier of mosquito coil type Teflon electric heater. We can undertake non-standard products, in the voltage, power, size and product shape, as well as wiring, according to customer demand for engineers to design, welcome to the drawings and samples customized production.

quartz heater

Quartz heating tube, commonly used for carbon fiber quartz heating tube.

Carbon fiber heating tube [3], also known as carbon fiber heating tube, infrared heating tube, infrared heating tube, carbon fiber infrared heating tube, carbon fiber infrared heating tube, etc. A carbon fiber wire is placed in a quartz tube, the tube is vacuumized and sealed, and a voltage is applied on the carbon fiber wire to make the carbon fiber wire heat and generate heat. The company's products use imported carbon fiber heater, with the advantages of large power margin, high temperature resistance, high heat capacity, long service life, and power can be adjusted at will.

Radiant heating tube

It is widely used in the field of indirect heat treatment to protect the heat of the work-piece in the furnace lining. The electrothermal alloy material used in radiant heating tube should have high resistivity and high electrothermal conversion rate. Because the radiant tube is placed in the sleeve, the heat transfer process is different from the general open type electric heating element, and its heat shield is large. During the heating process, the element temperature must be controlled to prevent the element from overheating. The surface temperature of the heating element is about 100 ℃ - 150 ℃ higher than that of the furnace when the radiant tube is closed for heating. Therefore, it is necessary to analyze the furnace temperature and atmosphere during material selection, and select the correct heating material [1].