Heating Principle of Pipeline Heater - Yangzhou Darui
Darui Electric recommends
Pipeline heaters are divided into two modes: one is to use the flange-type tubular electric heating element inside the pipeline heater to be inserted upside down into the reaction kettle jacket of the pipeline heater to heat the thermal oil, transferring the thermal energy in the pipeline heater to the chemical raw materials in the reaction kettle inside the pipeline heater.
Another way is to directly insert the tubular electric heating element of the pipeline heater into the reaction kettle of the pipeline heater or evenly distribute the electric heating tubes around the wall of the pipeline heater. This mode is called the internal heating type of the pipeline heater. The internal heating type of the pipeline heater has fast heating and high efficiency.
Another mode of the pipeline heater is the far-infrared electric heating device. That is, the electric heater in the internal system of the pipeline heater wraps the bottom of the reaction kettle in the pipeline heater and the middle and lower parts of the pipeline heater for heating. The far-infrared electric heating device of the pipeline heater has a large heating area in the internal system of the pipeline heater, stable and fast heating of the pipeline heater, uniform heat release of the pipeline heater, convenient temperature control of the pipeline heater, the pipeline heater can be controlled in upper, middle, and lower sections, the temperature of the kettle wall in the pipeline heater is easy to control, the pipeline heater has no side effects on the fuel in the kettle, and will not cause carbonization of materials in the pipeline heater, the pipeline heater operates without noise, no pollution, long service life of the pipeline heater (more than 30,000 hours), and significant energy saving of the pipeline heater (more than 28%).
The pipeline heater is a new generation of reaction kettle heater for the internal system of the pipeline heater. The pipeline heater uses electric heating combined with far-infrared technology to evenly distribute heat into the kettle of the pipeline heater. The pipeline heater saves more than 30% of production costs compared to the original thermal oil and steam heating; the temperature control system of the pipeline heater uses silicon controlled rectifier as the main component with a computer interface, the pipeline heater uses a computer to analyze and control the temperature difference, making the operation of the pipeline heater easier for the operator, the far-infrared in the pipeline heater promotes blood circulation, beneficial and harmless to the human body. Under the environment of energy saving, emission reduction, and environmental protection, the development prospect of the pipeline heater is also expanding. Many large chemical units at home and abroad are correspondingly replacing thermal oil and steam heating with far-infrared heating.
Pipeline heater is also an efficient, environmentally friendly, and energy-saving radiant heater. After being powered on, the pipeline heater can form a strong wide-spectrum directional radiation in the vertical space of the pipeline heater. The pipeline heater effectively converts electrical energy into far-infrared radiation energy of the pipeline heater, directly transfers it to the object to be dried, quickly converts it into molecular thermal motion, dries from the inside out, achieves the purpose of rapid drying and shaping, and obtains significant energy-saving effects of the pipeline heater. The silicon carbide far-infrared electric heating plate of the pipeline heater uses a silicon carbide plate coated with metal oxide, i.e., far-infrared coating, as the radiation element. The heating wire is installed in the element hole (or groove) of the pipeline heater, and a thick layer of insulation, refractory, and heat insulation material is placed at the bottom of the element of the pipeline heater. Then the metal shell of the pipeline heater is installed, and the wiring terminals of the pipeline heater are installed for power-on use. The silicon carbide in the pipeline heater has a room temperature flexural strength of 45Mpa, a high-temperature flexural strength of 50Mpa at 1000°C, a volume density of 2.7-2.75g/cm3, a thermal expansion rate of 0.42-0.48% at 900°C, and a thermal conductivity (350°C) of 10.3-16.7w/m.k.
When the far-infrared radiation in the pipeline heater radiates onto an object, absorption, reflection, and transmission of the pipeline heater can occur. The material to be heated and dried absorbs far-infrared radiation energy simultaneously at a certain depth inside the pipeline heater and on the surface molecules of the pipeline heater, generating a self-heating effect, causing the solvent or water molecules in the pipeline heater to evaporate, and the heating of the pipeline heater is uniform, thereby avoiding deformation and qualitative change caused by different degrees of thermal expansion in the pipeline heater, keeping the appearance, physical and mechanical properties, fastness, and color of the material in the pipeline heater intact. The pipeline heater is widely used in automobiles, textiles, printing and dyeing, dyes, papermaking, bicycles, refrigerators, washing machines, chemical fibers, ceramics, electrostatic spraying, grain, food, pharmaceuticals, chemicals, tobacco, and other industries, achieving ultra-fast drying purposes of the pipeline heater. The pipeline heater has the advantages of good radiation effect, significant power saving, easy use and maintenance, etc. The heating of the pipeline heater is also particularly suitable for large drying rooms, drying ovens, and flow drying tunnels for leather machinery.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
