Estudo da interação fibra-partícula em processo de separação gás-sólido.

Abstract

The growing concern about air pollution, recently aggravated by industrial growth, has led to the development of techniques and equipment for gas purification and filtration to become essential for sustainable technological development. In addition to environmental merit, perfecting filtration techniques for various types of emitted particles is important also for industries wishing to recover such particles, since capturing this powder in the gas can add value to the by-product of the process, increasing the total industry profits . Filtration is one of the most common techniques for capturing particulate matter, since it uses equipment with great potential, efficiency and little vulnerability to changes in operating factors. One of the most used equipment in gas-solid filtration is the sleeve filter. The use of such filters seeks to minimize the emission of particles into the atmosphere, in addition to recovering a significant amount of the dust that would initially be neglected, when the same has an economic interest on the part of the industry. These filters are widely applied for their high efficiency in the method of retention of the particulate material in the fabric and economical advantage (low implantation cost). The general filtration process occurs through the formation of pies and these assist in the role of particle retention. Using polyacrylate and polypropylene fabrics the filtration and formation of pie with ground phosphate rock powder and sweet powder Amafil. Working with reverse airflow and adopting the filtration surface velocity of 10 cm / s, pressure variation in the pie of 20 cmH2O and cleaning speeds of 7, 11 and 15.5 cm / s, for the calculation of adhesion strength the methods of Kendall, Rumpf and Seville were used. Through the experiments it was possible to conclude that the three methods of calculating adhesion strength remitted values consistent with reality, within their limitations, due to the difficulty in quantifying the effective separation distance (a) for the Rumpf method. Through Seville it was obtained the greatest adhesion force for the four tests. The adhesion strength and a were higher for the polypropylene and phosphate rock filters. The calculations of the effective separation distance using the Rumpf equation are within the range of 4.10-10 and 4.10-8 m proposed by Schubert (1981), proving that the removal voltage obtained experimentally was satisfactory.