Introduction of PTFE heating element
Characteristics of PTFE heater:
1. Excellent corrosion resistance: Polytetrafluoroethylene plastic is a chemically inert material. Except elemental fluorine at high temperature, molten alkali metal, chlorine trifluoride, uranium hexafluoride, and perfluorokerosene, it can be used in all Working in media. Such as: various strong acids and bases, sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, sodium hypochlorite, naphthalene, benzene, xylene, acetone, aqua regia, chlorine gas, toluene, various organic solvents, etc .;
2. Good anti-scaling performance: The chemical inertness, surface smoothness, flexibility and high expansion coefficient of the PTFE heating tube make it difficult for the heat transfer surface to scale, ensuring a relatively stable heat transfer coefficient;
3. Long life and low comprehensive cost: PTFE does not contain photosensitive genes, so it has excellent resistance to atmospheric aging. Its service life is 20 to 30 times that of stainless steel in strong corrosive media. In addition, our company Yancheng Fulan has completely solved the problems such as easy to hang in the past, which greatly increases its service life;
4. Good heat transfer performance: Due to the small pipe diameter, no temperature difference gradient, and thin-walled tube, the shortcoming of the low thermal conductivity of PTFE material is overcome, and the total heat transfer coefficient can reach 200-350 (W / ㎡ .K);
5. Small resistance: Because the friction coefficient of PTFE heating tube is small, the roughness is low, and the lubricating performance is particularly good, the resistance of the fluid in the tube bundle is smaller than that of the metal tube.
6. Excellent non-stickiness of PTFE heater: The surface free energy is extremely low, which is one of the few materials with the smallest surface free energy among known solid materials. Almost all media cannot adhere to its surface, and no dirt is generated during use. Using high-quality fluoroplastic materials, Teflon electric heaters developed based on the physical and chemical properties of fluorine materials and the improvement of materials are suitable for heating various strong acid and alkaline liquids. The heater has excellent anti-aging and warping performance.
Key points of PTFE electric heating element design:
1. Made of metal polytetrafluoroethylene jacket with electric heating tube, strong corrosion resistance, suitable for heating various corrosive liquids;
2. Low surface power design (1.5w / c㎡) to ensure product life;
3. Attention should be paid to the installation position of the PTFE heater to prevent solids in the solution from depositing on the surface of the electric heater, which will cause the surface of the PTFE tube to burn out.
4. The volume size of the electric heater cannot be reduced casually, otherwise the surface power of the electric heater of the PTFE heating tube will be increased too much, which will affect the service life of the PTFE heater;
5. Can be equipped with overheat protector to ensure the service life of the heating pipe and the safety of the equipment.