The invention discloses a dry-type drilling dust removal
system and a dust removal method thereof. The dry-type drilling dust removal
system comprises a dust residue collector, a dust residue separator and a multi-stage
dust collector which are sequentially communicated with the rear end of the dust residue collector and a negative pressure device used for driving gas with dust to flow; based on multiple kinds of sealing and dust removal principles such as flexible dynamic seal, ejecting drawing, inertial residue removal,
cyclone dust removal and water bath dust suppression, firstly, the dustresidue collector is designed, under the condition that normal drilling is not affected, hard friction with a rotating
drill pipe is avoided, and a sufficient sealing effect is guaranteed, slack coaland
coal dust which are blown out by
compressed air during drilling are effectively collected, dust residue separation, first-stage dust removal and second-stage dust removal are sequentially completed, inertial residue removal,
cyclone dust removal and water bath dust removal are realized, and the collected
coal dust is cleared off thoroughly. The unique power is downhole
compressed air, and theproblems are solved that an existing
dust collector is complex in structure, high in cost and poor in adaptability.