Bag opening sealing mechanism of flue gas dust removal filter bag

The invention belongs to the field of dust removal, and particularly relates to a flue gas dust removal filter bag opening sealing mechanism, a mounting mechanism comprises a bag opening and a spring expansion ring wrapped in the bag opening, the outer wall of the bag opening is connected with a first bag opening felt and a second bag opening felt which are bulged, a V-shaped groove clamped with a pattern plate through hole is clamped between the first bag opening felt and the second bag opening felt, and the first bag opening felt and the second bag opening felt are connected with the spring expansion ring. Compared with a traditional concave groove, the groove is tighter, sealing between a bag opening and a tubesheet is firmer, attaching is tighter, rotation is not prone to occurring, and ultra-low emission and even zero-approaching emission are better facilitated. The static sealing mechanism and the dynamic sealing mechanism which are matched with the first pocket mouth felt and the second pocket mouth fe