Dust and debris filtration system for cleaning air used in the conveyance of granular material to and from the silo, dry bulk trailer, rail car, and other transportation and conveying means

A dust filtering and collection system for use in a pneumatic loading/unloading system, such as a tank trailer, said system for use for moving product granular materials by way of a vacuum or pressure source to and from a storage chamber, comprising:

• a dust filtering housing, said housing having an upper end that incorporates a closure member and a bottom end into which dust particles and other debris collect, the bottom end having a valve, which when opened, allows for dispensing of the collected dust particles;
• a dust filtering system suspended within said filter housing, a transverse plate provided in the upper segment of said housing, said transverse plate with a closure member providing a clean air chamber and a clean air outlet, at least one filtration tube suspended from the transverse plate and extending partially downwardly into the filter housing, a clean air outlet provided for discharging clean filtered air from the filtration system, said clean air outlet extending from the clean air chamber, a dusty air inlet communicating with the filtration housing, and disposed for passing dusty air into the filtration housing, whereby through the filtration system air used in the conveying systems of a bulk tank trailer or other system for transport of such granular materials is cleaned, wherein each filtration tube of the at least one filtration tube is secured within a grommet that engages the transverse plate so as to prevent any disengagement of the grommet, and its supported filtration tubes, when subjected to the high pressures of the dusty air entering into the filter housing of the filtering system, wherein the grommet includes an annular recess, into which the transverse plate locates, for locking and holding each grommet, and its filtration tube in position during installation and operations of the filtering system of this invention, and wherein each grommet includes a further annular recess positioned within the grommet into which an upper integral flange-like portion of one of said at least one filtration tube snaps to secure the at least one filtration tube to the grommet.