Pipeline heaters are divided into two modes:
The first mode is to use the flange-type tubular electric heating elements inside the pipeline heater to be inserted upside down into the reactor jacket of the pipeline heater to heat the heat transfer oil, transferring the thermal energy in the pipeline heater to the chemical raw materials in the reactor inside the pipeline heater. The second mode is to directly insert the tubular electric heating elements of the pipeline heater into the reactor inside the pipeline heater or evenly distribute the electric heating tubes around the walls 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 is the far-infrared electric heating device. That is, the electric heater in the internal system of the pipeline heater wraps around the bottom of the reactor 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 temperature rise of the pipeline heater, uniform heat release of the pipeline heater, convenient temperature control of the pipeline heater, segmented control of the upper, middle, and lower parts of the pipeline heater, easy control of the temperature of the reactor wall inside the pipeline heater, no side effects on the materials in the reactor of the pipeline heater, no carbonization of materials in the pipeline heater, no noise during operation of the pipeline heater, no pollution, long service life of the pipeline heater (over 30,000 hours), and significant energy saving of the pipeline heater (over 28%).
The pipeline heater is a new generation of reactor 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 reactor inside the pipeline heater. Compared with the original heat transfer oil and steam heating, the pipeline heater saves production costs by more than 30%; 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 pipeline heater far-infrared promotes blood circulation, which is beneficial and harmless to the human body. Under the environment of energy saving, emission reduction, and environmental protection, the development prospects of the pipeline heater are also expanding. Many large chemical units at home and abroad are correspondingly replacing heat transfer oil and steam heating with far-infrared heating.
The pipeline heater is also an efficient, environmentally friendly, and energy-saving radiation heater. After being powered on, the pipeline heater can form a strong broad-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, which is directly transmitted to the object to be dried. The pipeline heater quickly converts into molecular thermal motion, drying from the inside out, achieving the purpose of rapid drying and setting, and achieving 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 pipeline heater installs electric heating wires in the element holes (or slots), places thick insulation, refractory, and heat insulation materials at the bottom of the element of the pipeline heater, then installs the metal shell of the pipeline heater, and installs the wiring terminals of the pipeline heater for power use. The silicon carbide of 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, with uniform heating of the pipeline heater, thereby avoiding deformation and qualitative change caused by different thermal expansion degrees of the pipeline heater, keeping the appearance, physical and mechanical properties, fastness, and color of the material of the pipeline heater intact.
Pipeline heaters are widely used in industries such as automobiles, textiles, printing and dyeing, dyes, papermaking, bicycles, refrigerators, washing machines, chemical fibers, ceramics, electrostatic spraying, grain, food, pharmaceuticals, chemicals, tobacco, etc., achieving the purpose of ultra-fast drying 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 leather machinery drying rooms, drying ovens, and flow drying tunnels.
