Under normal flue gas temperature conditions, bag filter dust filter bag temperature requirements below 150 °C, while the higher temperature flue gas, such as smelter, carbon black plant, ironworks, blast furnace gas, calcium carbide plant Exhaust gas from kiln furnaces, castings, flue gas from steel plants, tail gas from cement plant kiln, bituminous concrete-mixed asphalt flue gas, coal-fired boilers and other high-temperature dust removal and purification are not sufficient. The first reason is that these dust-containing smoke dusts are not suitable for collection by the electrostatic precipitator due to the limitation of specific resistance. They can only be collected by cloth bags or other methods. Second, if the temperature of dust-containing flue gas is lowered to below 150°C, the investment is higher. Or because of the restrictions on the site; the third reason is that due to the sulfur content in the dust-laden flue gas, the dust-laden flue gas has an acid “dew point” and can only be filtered and separated when the temperature is higher than the acid dew point or higher. This requires a chemical fiber that can tolerate higher temperatures to make filter media.
Connex Needle Needle, also known as Nomex or Meytas Needle Prick, except for the spinnability and abrasion resistance of polyester fiber, its greatest feature is its excellent heat resistance and flame retardancy. Infusibility. The fiber oxygen index can be 29%, not natural. At temperatures above 400°C, the fibers are slowly carbonized. In addition, Meytas fiber also has good dimensional stability. Compared with glass fiber, its abrasion resistance, folding resistance is more unmatched than glass fiber. Therefore, its high temperature resistance, long service life, is currently the preferred filter material filter bag filter.
Conex needle felt can be operated continuously at a temperature of 204°C with an instant temperature of 250°C and can withstand repeated fluctuating temperatures of 250°C instantaneously, and at the same time, it has excellent dimensional stability performance and is less than 1% at 250°C. The thermal shrinkage rate has excellent high temperature stability. Good chemical resistance will not affect the low concentration of acids and bases and most hydrocarbons. Even a small amount of fluoride will not significantly corrode it. Mytas filter materials have been proven to be widely used in high-temperature filtration, and long-term use can maintain high strength and high wear resistance. Widely used in asphalt, cement, steel, nonferrous metals, lime, dust, metallurgy, drying, gravel, gypsum, plastic, carbon black, coke, shipbuilding, tobacco and other industries.