High Temperature Needle Filter Felt
P84 high temperature resistant needle punched filter felt-one new type of high temperature resistance. We are the first enterprise for its volume production at home.It has three remarkable features:1.Remarkable high temperature resistance:working temperature 260oC. It has enough safe space to deal with the machine stop and accident etc.2.Favorable chemical resistance:It has been proved that P84 filter bag has the excellent filter value for the acid waste gas, alkali powder and dust in the past waste incineration more than 10 years.3.The efficiency of low back wash pressure and high elasticity mud cake releaseThe feature of P84 fiber is much remarkable because of the fine fiber and the fiber surface area increases to the max even due to the irregular fiber cross section, which supplies more microspores resulting in the better filter efficiency than the depth filtration. The dusts only rest on the filter felt surface not penetrating in it, so the efficiency of low back wash pressure and mud cake release could be improved, which has excellent superfine particle collecting efficiency and small operating pressure difference.There is much experience for using P84 filter material in the gypsum plant, cement plant, waste incinerator, liquid bed boiler, coal-fired boiler etc.
In the field of filter bag, usually people regard the bag as the heart of filter bag, what kind of flue gas that the filter bag can deal with, it dependson the chemical fiber itself for the bag. Under the common flue gas condition, it needs that the bag can endure the 150℃ below, in this occasion, polyester, polypropylene, acrylon, chinlon etc could be suitable for this. But in the high temperature occasion, such as chemical, carbon black (white carbon black) tail gas, blast furnace gas in irons melting plant, vertical kiln tail gas in cement plant, kiln furnace tail gas from calcium carbide plant, casting, flue gas of steel smelting, gypsum concrete gas, fire-resisting brick gas, coking gas etc. the powder gas is unfit for electricity dust-collecting, only using the bag or others because of the mass resistively limit, the second reason is if we cool the powder gas below the 150℃ , the investment cost is higher and the space site is limited, the third is because of the sulphur content of the flue gas, and the powder gas contain the acid dewing point, it can filtrate and separate that the flue gas is under the high temperature condition, which needs the high temperature resistant chemical fiber to make the filter medium.