Heat-resistant composite glass fiber filter material and preparation method thereof

Abstract

The invention aims to provide a heat-resistant composite glass fiber filter material and a preparation method thereof. The filter material has the characteristics of good filtering effect, good heat resistance, low production cost and long service life, and can meet the filtering requirements of cement kiln tails and similar working conditions. The technical scheme adopted by the preparation method of the heat-resistant composite glass fiber filter material in the invention is as follows: adopting glass fibers to prepare warps and wefts and preparing into filter cloth by using the warps and wefts, wherein the warps are obtained by infiltrating the glass fibers with polytetrafluoroethylene infiltration emulsion while the wefts are obtained by expanding.

Description

technical field [0001] The invention relates to an environment-friendly filter material and a preparation method thereof, in particular to a high-temperature resistant composite glass fiber filter material and a preparation method thereof. Background technique [0002] At present, in cement, power plants, steel and other working conditions, most of the high-temperature-resistant filter and dust-removing bags are woven with a single glass fiber yarn. There are many defects in the use of this single-material filter cloth. The first is that due to the poor folding resistance and wear resistance of the glass fiber, the high temperature resistance is general, and the service life is short when working in an environment of 150~300°C. The second is that due to the use of a single glass fiber, the filter cloth is woven into a cloth from rounded and parallel glass fiber strands through processes such as retreat and warping. During the unmerging process, the twisted warp and weft yar...

AI Technical Summary

Problems solved by technology

[0002] At present, in cement, power plants, steel and other working conditions, most of the high-temperature-resistant filter and dust-removing bags are woven with a single glass fiber yarn. There are many defects in the use of this single-material filter cloth. : First, due to the poor folding resistance and wear resistance of glass fiber, the high temperature resistance is average, and the service life is short when working in an environment of 150-300 °C

During the unmerging process, the twisted warp and weft yarns of the fiber bundles are very dense, and the airflow can hardly pass through the inside of the twisted ply yarns, and can only pass through the holes where the warp and weft yarns interweave. In order to ensure a certain air permeability of the fabric, the holes of the ply yarns are generally smaller Large, even if the formed powder layer is filtered, the filtration speed should not be too high, otherwise it is easy to permeate, so the filtration effect is not ideal

The third is that the temperature, humidity, dust concentration, chemical composition and particle size distribution of the flue gas dust generated by different dust raising points, and the composition and content of harmful gases in the flue gas are all different. Filter cloth, it is difficult to effectively filter the smoke and dust

For example: the cement shaft kiln has a large dust suction volume, a large moisture content in the flue gas, a high dust concentration, and a large temperature change. A single glass fiber filter cloth can no longer meet the filtration requirements of similar working conditions.