As a unique pre-filter medium, Poret® has already proven itself in the field of supply air filtration for gas turbines and compressors. But how does Poret® perform with a pulse filtration system?
The new Poret® Wrap increases the dust holding capacity of your pulse filters by up to 50% and can thus contribute to an extended operating time of a pulse filtration system. The use of the pre-filter wrap hardly leads to an increase in the initial pressure difference. Rather, the Poret® wrap acts as a protective shield for a more stable pressure difference of the pulse filter system and thus secures your system operation. Because the key feature is: The Poret® Wrap is the only pre-filter media for pulse filters that can be effectively pulsed!
Unlike synthetic fibre media, the open-pored structure of the Poret® Wrap remains intact even during pulsing and also in high humidity. This always enables stable filter efficiency and minimal pressure drop. In addition, the pre-filter wrap for pulse filters enables sustainable use, as the Poret® pre-filter media is washable and thus reusable.
The following diagram compares the dust holding capacity of a pulse filter without pre-filter media, with a synthetic pre-filter medium as well as with the Poret® Wrap. The dust loading was performed without a pulse effect up to a final pressure difference of 300 Pa.
While the use of a synthetic pre-filter media hardly contributes to a higher dust holding capacity of a pulse filter, the dust holding capacity increased by up to 50 % with the Poret® Wrap at an identical final pressure difference.
The following diagram shows the difference in the initial pressure difference of a pulse filter with and without the Poret® Wrap. At a typical volume flow of 2500 m³/h for control mode, the initial pressure difference of the pulse filter with and without the Poret® Wrap is almost congruent.
As a pre-filter media, the Poret® Wrap contributes only minimally to a higher initial pressure difference of the pulse filters. Rather, the wrap ensures a more stable pressure difference during operation in order to realise an extended service life of the pulse filters and thus a low maintenance requirement.
Synthetic pre-filter media are not suitable for pulse filtration system because the fibre structure is quickly blocked by coarse particles, which in turn can hardly be shaken off even by a pulse effect. In contrast, the Poret® Wrap also excels in the pulse effect as an optimal protective shield fo the pulse filter. As the following video shows, coarse particles are successfully separated by the Poret® Wrap before they reach the pulse filter. During the pulse effect, the separated dust particles are in turn shaken off smoothly.
Dust loading of the Poret® Wrap before and after the pulse effect
Even under high loads of dust particles, the open-cell pore structure of Poret® remains permanently open. Dust accumulates inside the pore structure, so there is no blocking of the media by the particles, as it is the case with synthetic fibres within a very short time.
The Poret® Wrap can be easily washed, so it will be as clean as before usage. Thus, it is reusable for multiple times. Even after washing, the open-cell pore structure of the prefilter wrap remains intact and always exhibits stable filter efficiency and consistent initial pressure drop.