A simple, cheaper and alternative pretreatment for increasing the collection efficiency of fine particulates in nonwoven filter media is precoating, which consists of coating the inside and the surface of the nonwoven filter media with a particulate material forming a layer of initial powder. This layer prevents the particles from penetrating the filter medium and causes clogging. It is also responsible for the clogging which is the initial formation of the pie, acting as a new filtering element ensuring surface filtration. Thus, the purpose of precoating is to assist in the separation of the micrometric and nanometric particles, as well as to ensure that the gas flows freely through the filter medium, improve the performance of the filter sleeves, increase filter media life and facilitate cleaning, promoting better detachment of the pie from the filter media. The choice of the powder to be used in precoating must be judicious because it has a direct influence on the filtration efficiency as well as obtaining the clogging point and the pressure loss at which this point is reached. Thus, the objective of this work was to determine the precoating powder and the precoating limit pressure drop, which ensures the clogging of the filter medium to obtain the best collection efficiency in fine particle filtration from the secondary dusting of the steel plant of a steel industry...
Session: G8 - Short Oral Presentations
Day: 23 October 2019
Time: 14:45 - 16:00 h