SLEEVE FILTER FOR THREE-STAGE AIR CLEANING OF MECHANICAL IMPURITIES Russian patent published in 2011 - IPC B01D46/02 

FIELD: process engineering.

SUBSTANCE: invention is intended for cleaning aspiration air bled from woodworking grinding machines. Proposed filter comprises filtration modules with dust entrapping chambers, dusty air pipeline, collectors, filtration sleeves, bin, horizontal panel of ACF-type air cell-type filters, chambers of cleaned air and re-cleaned air, fans and circulation air duct. Cleaned air chamber accommodates T-line web with horizontal platform and vertical wall. Panel of filters is arranged on one side of said wall to make the chamber of air re-cleaning at the wall bottom and, at the wall top, to make re-cleaned air chamber. Crosswise web is arranged in the latter between horizontal platform and panel. Inspection ports are arranged ay inlet and outlet of additional dust entrapping chamber and re-cleaned air chamber and in crosswise web. Cleaned air discharge collector is arranged to embrace inspection ports. Circulation air duct incorporates T-tube with additional air duct communicated with filter bin opening. Additional and circulation air ducts are provided with controlled air shutters arranged in additional and circulation air ducts at T-tube outlets and dusty air feed pipeline.

EFFECT: reduced operating and repair costs, expanded operating performances.

12 dwg