Industrial Chemical Resistance PPS(Polyphenylene Sulfide) Waterproof Filter Cloth (needled Felt)
PPS non-woven needled felt has excellent resistance to chemical and good hydrolysis stability. The property makes it to be the best choice of the filtration material for the industry condition with abnormal dew point. It can long-term work under the temperature of 190 PPS non-woven needled felt...
PPS non-woven needled felt has excellent resistance to chemical and good hydrolysis stability. The property makes it to be the best choice of the filtration material for the industry condition with abnormal dew point. It can long-term work under the temperature of 190℃ and can short term stand up to 220℃. Compared with aromatic polyamide fiber, it has better hydrolysis stability. The strength if fiber will not reduce even in 160℃ and 79% of relative humidity conditions for 500 hours. But its antioxidant ability is bag, therefore, it is particularly important to know the actual temperature, oxygen content NOX content in order to ensure the longer using life the product must have the special treatment if dipping and size-fixing at high temperature. It is also needed to suggest the working temperature at the range of 145℃ ~160℃ to ensure the optimum operation. The material is the best choice for the application of bag-mode dust catcher for the domestic coal-fired boilers. Our PPS filtration bag is widely applied in the dust catcher for the coal-fired boilers of 75T, 120T, 240T, 420T, 490T and 1000T. The performance is quite good.
Waterproof and oil-proof function of the non-woven needled felt product
In some of the working conditions, the water contains of the flue gas is high and the temperature of it is relative low. The humidity in the gas then turns to dew on the surface of the filtration bag. That often leads to the dust sticking on the surface of the bag and reduction of the filtration function. The waterproof and oil-proof function for the common needled felt material/bag are all not good. In order to prevent the above mentioned problem. We should apply the pos-treatment of dipping or surface coating of water-proof materials for the filtration material. The materials will have the function of waterproof and oil-proof function after the treatment and the size-fixing process under high temperature. The technology makes the filtration on bags having the same ideal performance even in the high humidity conditions.
Anyhow, the high humidity gas, especially the gas that contains water-absorbable dust, is easy to lead the dust sticking on the filtration bag. We recommend that the customers should choose the regular and simple round bag but not the flat bag with complex sharp and design. The working temperature of the dust catcher should be controlled to 10℃-20℃ higher that the dew point.