An elastic reset device arranged in the middle of a grate plate is disclosed, which includes reset blocks, springs, sleeves and a guide plate. The reset blocks comprise a left reset block and a right reset block, the upper ends of the left and right reset blocks are partially overlapped, a folding angle α is provided at the overlapping portion and is not less than 45 degrees, and a ceramic fiber blanket is filled at the folding angle.

An elastic reset device arranged in the middle of a grate plate is disclosed, which includes reset blocks, springs, sleeves and a guide plate. The reset blocks comprise a left reset block and a right reset block, the upper ends of the left and right reset blocks are partially overlapped, a folding angle is provided at the overlapping portion and is not less than 45 degrees, and a ceramic fiber blanket is filled at the folding angle.