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Ceramic Textiles & Composites

Advanced Textile for High Temperature Filter Bags

3M offers an advanced textile for manufacturing high temperature fil- ter bags which can be used at tem- peratures up to 700ºF (371ºC). This advanced fabric has proven successful in hot gas filtration bag houses. (Typical properties of the textile are provided on the back.) 3M™ Filter Bag Fabric FB-700 There are two variations of the textile suited for 700ºF (371ºC) temperatures; depending upon the bag house specifications, either reverse air or pulse jet. Each performs equally well in the rigorous environment of hot gas particulate filtration. For REVERSE AIR FILTRATION, the 3M™ FG7-14, a 14 oz. filter bag fabric, is recommended for use at temperatures up to 700ºF (371ºC). For PULSE JET FILTRATION, the 3M™ FG7-22, a 22 oz. filter bag fabric, is recommended for use at temperatures up to 700ºF (371ºC). The filter bag fabric is comprised of a woven glass textile that has been coated to give excellent filtration properties in high temperature environments. The inorganic coating is a proprietary 3M innovation that enhances the dynamic mechanical properties of the fiber. This gives the filter bags improved high termperature performance. The textile can be sewn into a variety of lengths using 3M™ Sewing Thread GT-15. A typical application in a pulse jet or reverse air bag house would allow the filter to be mounted using standard industry methods. New high wire count cages and close attention to the bag-to-cage fit will enhance the life of the products. The recovery of valuable product or removal of unwanted dust can be achieved with a filter bag made from this advanced textile. While the filter bags produced from the FB-700 textile look and behave like typical filterbags, they can withstand higher temperatures. This reduces failure due to thermal excursions and minimizes the need to cool the gas, which lowers operating costs. For new bag house construction, higher temperature filtration offers the opportunity to reduce the size of the gas clean-up facility and the opportunity to use hot gas emission reducing technologies. Features: Applications : Efficient particulate filtration Cement High temperature capability Incineration Chemical processing Resistance to thermal excursions Petrochemical Abrasion resistance Product collection Retrofit existing baghouses Coal-fired boilers