NOVELTY - Ash removing device comprises driving device, upper path flash board door, lower path overturning door, and sealing piece; the upper path flash board door comprises two flash board doors; two sealing slots of flash board doors comprises beam channel shaped bent plate; two side sealing frames; two flash board door driving; two flash board door guide wheels; lower path overturning door; ash pushing hook nail and link mechanism; external sealing structure; compact sealing structures; two labyrinth sealing; two first sealing structures; two second sealing structures.    USE - For removing ash from seals of fixed biomass gasification furnace.    DETAILED DESCRIPTION - Ash removing device comprises driving device; further comprises upper path flash board door, lower path overturning door set below the upper path flash board door, and sealing piece; the upper path flash board door comprises two flash board doors moving in opposite direction; two sealing slots of flash board doors welded at the rear part of the flash board doors comprises beam channel shaped bent plate, two side sealing frames set at the two ends of the flash board doors; two flash board door driving connecting rods connected to the flash board doors; two flash board door guide wheels connected to the flash board door driving connecting rods; lower path overturning door comprises cast steel material with slots on its two sides, it further comprises door frame inserted in the slot of the lower path overturning door and the terminal part is knife shaped oblique opening; ash pushing hook nail is set on the lower path overturning door and cylinder and link mechanism connected to the lower path overturning door to drive the overturning door; the sealing piece comprises external sealing structure of the flash board door sealed at the connecting point of the upper path flash board door and the exterior; two compacting sealing structures of the driving shaft sealed at the flash board door driving connecting rods; two labyrinth sealing structures composed of the side surfaces of the flash board door and the side sealing frames; two first sealing structures; two second sealing structures.    DESCRIPTION OF DRAWING(S) - Drawings shows the side view of ash removing device.