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Teflon heat exchanger

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Teflon heat exchanger

  • Categories:Industry news
  • Author:FEP tube lady
  • Origin:FEP tube lady
  • Time of issue:2001-02-12 15:23
  • Views:

Teflon heat exchanger

  • Categories:Industry news
  • Author:FEP tube lady
  • Origin:FEP tube lady
  • Time of issue:2001-02-12 15:23
  • Views:

  1. Teflon heat exchanger

  The full English name of Teflon is Polytetrafluoroetylene, Teflon, PTFE, F4, etc. for short. Because of the pronunciation, it is usually called Teflon, Teflon, Teflon, Teflon, etc. (all are the transliterations of Teflon). Teflon has comprehensive advantages that other materials cannot compete with, especially the temperature characteristics and corrosion resistance of Teflon materials in the application of heat exchangers, so that Teflon heat exchangers have been widely used in the corrosion resistance industry, such as Chemical, pickling, electroplating, medicine, anodizing and other industries.

  Teflon heat exchanger has super corrosion resistance and anti-aging performance. Because of its excellent temperature resistance, it is suitable for steam heating and hot water heating;

  Teflon heat exchanger is a new type of corrosion-resistant heat exchanger developed in the last ten years. The main results are shell-and-tube and immersive. It has unparalleled chemical stability and thermal stability (-250~260℃). The F4 heat exchanger tube sheet and tube bundle (φ3~10mm capillary tube) are sintered by advanced powder metallurgy technology, with excellent performance. Through a unique and advanced welding method, the connection strength between the Teflon heat exchanger tube bundle and the tube sheet can reach 1.5 Mpa;

  Teflon heat exchangers mainly have excellent corrosion resistance. Because Teflon is a chemically inert material, it can work in almost all media except for elemental fluorine at high temperatures, molten alkali metals, chlorine trifluoride, uranium hexafluoride, and perfluorinated kerosene. Such as: concentrated hydrochloric acid, hydrofluoric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid, oxalic acid, caustic soda, sodium hypochlorite, naphthalene, benzene, xylene, acetone, aqua regia, chlorine, toluene, various organic solvents, etc.;

  Teflon heat exchanger has good fouling resistance. Due to the chemical inertness, smooth surface, flexibility and high expansion coefficient of the PTFE tube, it is difficult to scale on the heat transfer surface, which greatly reduces the number of equipment maintenance and ensures a relatively stable heat transfer coefficient and production efficiency. Long-term operation.

  

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Figure 1: Teflon heat exchanger source: Internet

  Teflon heat exchanger has good anti-aging performance. Since Teflon does not contain photosensitive genes, it has excellent resistance to atmospheric aging. In strong corrosive media, its service life is 20 to 30 times that of stainless steel;

  Teflon heat exchanger has good heat transfer performance. The heat exchanger uses thin-walled tubes with wall thicknesses of only 0.5mm, 0.75mm, 1mm, so it overcomes the shortcomings of low thermal conductivity of Teflon materials, and its total heat transfer coefficient can reach 150-300 (W/m²) ·K);

  Teflon heat exchanger has low resistance. The friction coefficient of Teflon is very small, the roughness is low, and the lubrication performance is very good, so the resistance of the fluid in the tube bundle is smaller than that of the metal tube;

  The Teflon heat exchanger is small in size, light in weight and compact in structure.

  2. Special Teflon tube for heat tracing sampling tube

  Heat tracing sampling tubeAccording to the actual conditions such as the composition and temperature of the collected sample gas, the sampling tube in the corrosion-resistant heat tracing sampling composite tube can be made of different materials, such as PFA (tetrafluoroethylene and perfluoroalkyl ether copolymer), FEP ( Copolymer of tetrafluoroethylene and hexafluoropropylene), Teflon tube PTFE (polytetrafluoroethylene), PVDF (polyvinylidene fluoride). The heating cable can be selected for medium, low and high temperature heating, and compensation wires and power cables can also be added.

  

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Figure 2: Source of heat tracing sampling tube: Shenzhen Dankai

  The heat tracing sampling pipeline is a heat tracing method for flue gas pipelines in power plants, petrochemicals, natural gas, refined oil, crude oil and other industries. It is an important part of the environmental monitoring system.

  The special Teflon (sleeve) tube for heat tracing sampling tube is a special tube made of polytetrafluoroethylene (PTFE commonly known as Teflon, plastic king) material after extrusion and sintering, drying, high temperature sintering, and shaping.

  Teflon is also called Teflon, Teflon, Teflon, Teflon, Teflon, PTFE, Plastic King, and Teflon in English. It is widely used in machinery, electronic appliances, automobiles, aerospace, and chemicals. , Computers, electric heating, military, communications and other important technology industries, such as miniature transformers.

  Performance of special Teflon tube for heat tracing sampling tube:

  1. Non-sticky: Teflon is inert, almost all materials are not bonded with Teflon, and the thin film also shows non-stick performance.

  2. Heat and cold resistance: Teflon has excellent heat and low temperature resistance. In a short time, it can withstand temperature to 300℃, melting point is 327℃, and it will not melt at 380℃. Generally, it can be used continuously between 240℃ and 260℃. It has remarkable thermal stability. It can work at freezing temperature. No embrittlement, cold resistance to 190℃.

  3. Lubricity: Teflon has a low coefficient of friction. The friction coefficient changes when the load is sliding, but the value is only between 0.04-0.15.

  4. Non-hygroscopicity: The surface of Teflon does not stick to water and oil, and it is not easy to stick to the solution during production operations. If there is a small amount of dirt, it can be removed by simply wiping. Short downtime, saving working hours and improving work efficiency.

  5. Corrosion resistance: Teflon is hardly corroded by chemicals, and can withstand all strong acids (including aqua regia), strong alkalis, and strong acids except molten alkali metals, fluorinated media, and sodium hydroxide above 300°C. The role of oxidants, reducing agents and various organic solvents can protect parts from any kind of chemical corrosion.

  6. Weather resistance: non-aging, the best non-aging life among plastics.

  Except for the Teflon tube, these properties are basically the same except for the temperature resistance of FEP and PFA.

  Shenzhen DanKai Technology Co., Ltd. (ShenZhen DanKai Technology Co.,ltd.), whose predecessor is Dongguan Dandi Insulation Material Co., Ltd. Fluoroplastic Material Factory, established in 1998, specializes in FEP, PFA, PTFE and other fluoroplastic pipes R&D, production and sales of rod, sheet and film products and other insulating materials. The company has a senior R&D team with international standards and a production line of fluorine plastic products imported from abroad. Some fluoroplastic products have passed ISO9001, SGS, FDA certification, and have been fully affirmed by domestic and foreign cooperative customers such as Huawei, Foxconn, Midea, ZTE, Intel, and AirTAC. The main products of the company are: ①Tubes: Ptfe tube, Fep tube, Pfa tube, Pvdf tube; ②Heat shrinkable tube: Ptfe heat shrinkable tube, Fep heat shrinkable tube, Pfa heat shrinkable tube, Pvdf heat shrinkable tube; ③Plate rod Membrane: Ptfe board and rod film, Fep board and rod film, Pfa board and rod film, Pvdf board and rod film; ④Insulation materials: silica gel, PE, PVC, UPE, etc.; ⑤Special category: PFA imported connector, spiral tube, spring tube , Rotary cut tube, welding rod, tee, straight-through, gasket, joint, taper rod, flared tube, sealing tube, braided tube, bellows, etc. At the same time, fluorine plastic products of various specifications can be customized and processed according to customer requirements.

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