Coal mine air ducts are ventilation ducts used in coal mines. Tunnel air duct is a ventilation duct used in tunnel construction. What is the difference between two air ducts? There is a difference in appearance color. The air ducts used in coal mines are generally made of black air duct cloth, while tunnel air ducts are made of orange air duct cloth. The second is the difference in wind duct technology. Coal mine air ducts are generally double steel ring air ducts, while tunnel air ducts are double zipper air ducts, so their flame retardant effects are different. Coal mine air ducts generally use flame-retardant and anti-static air duct cloth, but the requirements for tunnel engineering are not high. Of course, in recent years, many tunnel projects have also started using double air ducts, so using this type of air duct cloth is safer and more worry free.
Flame retardant and anti-static air duct, the air duct itself is non-conductive and does not support combustion when exposed to open flames, making it safer to use. In terms of the use of ventilation ducts, both coal mine ventilation ducts and tunnel engineering ventilation ducts have the same requirements. The suspension of the air duct should be straight and not twisted or folded. The connection transition between air ducts should be smooth. The foldable telescopic skeleton air duct can be used at turns to maintain smooth ventilation. The air duct interface should be kept tight and free of air leakage. The damaged air duct should be repaired in a timely manner. If it cannot be repaired, it should be immediately replaced with a intact air duct to ensure normal and smooth ventilation.
The so-called coal mine flame retardant air duct refers to the air duct used for coal mine ventilation. Is there any difference between it and a regular air duct?
In fact, the bigger difference is the flame retardancy and anti-static performance of flame-retardant air ducts used in coal mines. This is achieved by adding antimony dioxide to the PVC solution when pressing it onto the base fabric during the coating process of the air duct fabric, which gives the produced air duct fabric a flame retardant effect. The required antimony dioxide here is 3% of the total solution capacity, so the flame retardant effect can meet the standard of coal mine flame retardant air ducts.
Anti static performance refers to adding a layer of anti-static agent to the surface of the air duct to form an anti-static film, which eliminates static electricity through the conductivity of the film. Mining flame retardant air duct is a type of flame retardant and anti-static air duct. In the presence of an open flame, it does not support combustion and does not conduct electricity. It is widely used in major mines. When using flame-retardant air ducts in coal mines, they should be hung straight and the connection transition should not be twisted or folded. Skeleton air ducts can be used at turns to maintain smooth ventilation.