PTFE, the English name of Polytetrafluoroethylene (English name Teflon or PTFE), the current domestic mainly known as PTFE. It is a polymer compound made of tetrafluoroethylene polymerized with excellent chemical stability and corrosion resistance. It is one of the best materials for corrosion resistance in the world today, except molten alkali metal, chlorine trifluoride, and five. In addition to chlorine fluoride and liquid fluorine, it is resistant to all other chemicals. Even if boiled in aqua regia, it does not change. It is widely used in various applications requiring acid and alkali resistance and organic solvents. Sealed, highly lubricated, non-sticky, electrically insulating, and highly resistant to aging, excellent temperature resistance (long-term operation at +250°C to -180°C).
Next, talk about the specific application of PTFE in dust removal
1. Needle felt made of PTFE fiber
The PTFE fiber needled felt filter material has good acid and alkali resistance, corrosion resistance, high temperature resistance, friction resistance and flex resistance, and the material is smooth, hydrophobic, and dust can not adhere to the surface of the filter material, and is widely applied to High-temperature, high-humidity, high-viscosity dust industry or purification of industrial fumes with acid, alkaline, and corrosive chemical gases. With the development of China’s environmental protection, PTFE fiber composite needle felt filter has a very important role in the high-temperature flue gas filter industry, has broad application prospects, can be applied to the following aspects.
(1) Waste incinerators, etc. Purify the flue gas with high humidity, high temperature, large water content, strong chemical corrosion, and high viscosity dust. In particular, the disposal of discarded medical supplies and household waste can solve the problems of high-temperature burning bags, high-viscosity dust bags, and chemical gas corrosion bags.
(2) Power plant boilers burning high-sulfur coal are cleaned with industrial soot of acid, alkaline, and corrosive chemical gases; they have the advantages of non-sticky bags, easy ash removal, low equipment operation resistance, and long service life.
(3) Flue gas purification of blast furnace gas in iron and steel smelters. It can mainly solve the problems of high-temperature, high-humidity, dew below the paste bags and high temperature sulfur and other chemical gas corrosion bags.
(4) Solve the problems of high temperature and high viscosity dust caused by the cement, metallurgy, and chemical industries, high operational resistance of equipment, and early embrittlement and damage of filter materials.
(5) Flue gas purification of coke oven and carbon black. It can mainly solve the difficulty of dust removal caused by high temperature and high viscosity dust, and the dew point oxidation reaction after shutdown can make the filter material brittle early.
2.Application of PTFE in Filter Coating
The surface of PTFE film is smooth and resistant to chemicals. It is laminated on the surface layer of ordinary filter material to act as a disposable dust layer. The dust is trapped on the surface of the film and the surface layer is filtered. With the traditional filter material unparalleled superiority. The film filter material has characteristics of high peel strength, high air permeability, low resistance, uniform pore size distribution, etc. As a dust bag or pleated dust filter cartridge, it is installed in a dust removal device, and will be effectively and effectively retained in microns. Ultrafine dust, dust removal efficiency of 99.99% or more, it is the most effective and economical new filter material for industrial dust filtration and material recovery. The biggest difference with other pure high-performance fiber (PPS, glass, P84, aramid) filter material is: as time goes by, PTFE will not be aging, along with the interaction of high temperature gas, corrosive gas and liquid, PTFE The strength of the base fabric will not attenuate, and its service life will be greatly improved.