The stainless steel heating tube heats the fluid through forced convection. The material is stainless steel. It means that a pump is used to pump the fluid into the heating chamber at one end of the heater. After being heated, it flows out at the other end of the heater. It is a heating method that uses forced circulation through a pump. Compared with the traditional heating method , significant energy saving, scientific technology, easy installation and use, and obvious economic benefits.
Product features:
1. Small size, high power: This electric heater mainly uses clustered tubular heating elements, and each clustered tubular heating element has a maximum power of 5000KW.
2. Fast thermal response, high temperature control accuracy, and high overall thermal efficiency.
3. Wide application range and strong adaptability: This circulation heater can be used in explosion-proof or ordinary situations. Its explosion-proof level can reach Class B and C, and its pressure resistance can reach 20Mpa. The cylinder can be installed vertically or horizontally according to user needs.
4. High heating temperature: The heater is designed to have a maximum working temperature of 850°C, which is unavailable with ordinary heat exchangers.
5. Fully automated control: Through the heater circuit design, automatic control of parameters such as outlet temperature, pressure, and flow can be easily realized, and it can be networked with the computer to realize human-machine dialogue.
6. Long life and high reliability: The heater is made of special electric heating materials, and the design power load is reasonable. The heater adopts multiple protections, which greatly increases the safety and life of the heater. .
7. The stainless steel electric heating tube is made of a metal tube as the outer shell, and spiral electric heating alloy wires (nickel-chromium, iron-chromium alloy) are evenly distributed along the central axis of the tube. The gaps are filled and compacted with oxidation materials with good insulation and thermal conductivity. Magnesia, both ends of the tube mouth are sealed with silicone or ceramics. This metal-armored electric heating element can heat air, metal molds and various liquids. ] High-temperature resistance wires are evenly distributed in high-temperature stainless steel seamless tubes, and crystalline magnesium oxide powder with good thermal conductivity and insulation properties is densely filled in the gaps. This structure is not only advanced, but also has high thermal efficiency and even heating. When high temperatures When there is current passing through the resistance wire, the heat generated diffuses to the surface of the metal tube through the crystallized magnesium oxide powder, and then is transferred to the heated part or the air to achieve the purpose of heating.
Energy-saving principles of infrared heaters
Far-infrared heaters
Basic theory of heat transfer:
1. Objects with different characteristics The emitted infrared rays have different characteristics (wavelengths), and infrared rays with different characteristics are easily received by objects with the same characteristics - that is, infrared rays emitted by solid materials are easily absorbed by solids but not easily absorbed by gases.
2. Forms of heat energy transfer: radiation, conduction, convection.
3. Thermal energy is mainly (90%) transferred in the form of radiation at high temperatures, and its radiation intensity is proportional to the fourth power of temperature.
4. The absorption capacity of radiant heat energy is directly proportional to the surface blackness of the heated object.
5. The thermal energy conduction intensity of a heated object is directly proportional to the temperature gradient (surface and interior of the object) and inversely proportional to the thermal resistance.
The energy-saving principle of electric heating paint:
The electric heating paint forms a strong coating after curing. This coating can absorb a large amount of radiant heat energy because of its high blackness on the surface. Because of its high emissivity, it can convert the absorbed radiant heat energy into far-infrared heat energy that is easily absorbed by the object and transmit it in the form of electromagnetic waves. Micron-level electrothermal paint has a thick coating, large thermal resistance, and high reflectivity. If it is used on the surface of the oven board, it will be lost. The heat energy is converted into far-infrared heat energy and radiates into the oven in the form of electromagnetic waves, which is absorbed by the heated objects in the oven and is not easily absorbed by moisture, thereby keeping the heat energy in the oven, which not only reduces the moisture discharge temperature, but also makes the oven The temperature inside the oven increases, so that the temperature in the oven is fully utilized. The coating of nanoscale electrothermal coating is thin and the thermal resistance is small. It is used on the surface of metal materials that receive heat and conduct heat in the oven. During the heat transfer process, the coating The layer not only converts the absorbed radiant heat energy into far-infrared heat energy transfer, and itself becomes a far-infrared radiation heat source, but also increases the temperature gradient due to the increase in surface temperature, which enhances the thermal energy conduction intensity of the heated object and absorbs heat. The ability is greatly improved. In short, the direct effects of converting radiant heat energy into far-infrared heat energy through electrothermal paint are: increasing the temperature of the oven, reducing the temperature lost by moisture drainage, enhancing the heat energy absorption speed of the heated object; reducing Heat energy loss is achieved to achieve the purpose of energy saving.
Explanation of infrared rays:
Infrared rays are one of the many invisible rays in the sun. They were discovered by British scientist Horschel in 1800. They are also called infrared thermal radiation. , he decomposed the sunlight with a prism, placed thermometers at the positions of the ribbons of various colors, and tried to measure the heating effects of light of various colors. It was found that the thermometer outside the red light heated up the fastest. Therefore, it is concluded that in the solar spectrum, there must be invisible light outside the red light, which is infrared. It can also be used as a medium for transmission. The wavelength of infrared rays in the solar spectrum is larger than visible light, with a wavelength of 0.75 to 1000 μm. Infrared rays can be divided into three parts, namely near infrared rays, with wavelengths between 0.75 and 1.50 μm; mid-infrared rays, with wavelengths between 1.50 and 6.0 μm; and far infrared rays, with wavelengths between 6.0 and 1000 μm.
The physical properties of infrared rays:
In the spectrum, the wavelength range from 0.76 to 400 microns is called infrared rays. Infrared rays are invisible light. All substances above absolute zero (-273°C) can produce infrared rays. Modern physics calls them heat rays. Medical infrared rays can be divided into two categories: near infrared rays and far infrared rays.
Near-infrared rays, or short-wave infrared rays, have a wavelength of 0.76 to 1.5 microns, and penetrate deep into human tissue, about 5 to 10 millimeters; far-infrared rays, or long-wave infrared rays, have a wavelength of 1.5 to 400 microns, and are mostly absorbed by the surface of the skin. Absorbed and penetrates tissue to a depth of less than 2 mm.
Quartz heater
Mica, quartz heater
Technical characteristics:
1. High temperature resistance. Mica board can withstand high temperatures of 600°C.
2． Good insulation performance. Insulation resistance is greater than 100MΩ.
3. Light weight and thin thickness. Small size, high power.
4. It can be conveniently and easily designed into various shapes according to needs, and the cost is low.
Application occasions:
1. Widely used in household appliances, such as rice cookers, microwave ovens, electronic disinfection cabinets, hair dryers, electric irons, etc.
2. It is widely used as heating components in various machines and equipment, such as laminating machines, copiers, printers, fax machines, etc.
3. Various industrial and agricultural heating situations, such as mold heating, plastic machinery, and other heating and drying devices.
Performance indicators: 1. Insulation resistance: ≥100 MΩ.
2. Withstand voltage: 1500V/1min.
3. Temperature resistance: 600℃.
4. Power deviation range: ±5%.
Technical parameters:
Serial number parameter selection range
1 Voltage ≤380V
2 Power 100～1000W
3 Working temperature -20～600℃
4 Shapes and dimensions are designed according to customer needs.
Ceramic electric heater
Ceramic electric heater is a high-efficiency heater with uniform heat distribution. It is a metal alloy with excellent thermal conductivity to ensure uniform temperature of the hot surface and eliminate Identify the hot and cold spots of the equipment. It has the advantages of long life, good thermal insulation performance, strong mechanical properties, corrosion resistance, and resistance to magnetic fields.
One is to wind alloy wire into small ceramic squares and wrap it with a stainless steel shell. Widely used in plastic machinery and chemical fiber machinery.
The other is to cast alloy wire in a semiconductor made of quartz glass. It has the characteristics of high temperature resistance (up to 1200 degrees), anti-corrosion, beautiful appearance and wear resistance. Widely used in high-temperature heating furnaces, semiconductor engineering, glass, ceramics and wire engineering. Ceramic electric heaters are available in coil and plate shapes. They are reliable in operation, long in life, sturdy and durable, and save energy. They have the advantages of flexible installation, high temperature resistance, fast heat transfer, good insulation, and the production is not limited by model and size. The wiring method can be customized according to user needs, with voltages ranging from 36V, 110V, 180V, 220V, and 380V. The maximum power load is 6.5W per square meter. Compared with traditional electric heaters, energy consumption can be reduced by 30%.