Solid flexible seal method for boilers in power plants

[0010] It can be seen from the drawings that the present invention includes a water wall 1, a wall-piercing pipe 2, a steam drum 3, and a sealing layer 4. It is characterized in that steel nails are welded on the wall-piercing pipe 2 and the water-cooling wall 1, and the sealing layer 4 The ceramic fiber cotton and the steel mesh are successively inserted on the steel nails and bonded to each other, and then the refractory castable is laid on the steel mesh, and the steel mesh and the steel nails are welded firmly. In this way, the sealing layer 4 forms a three-dimensional seal at the leaking part of the boiler. Since the materials used are all flexible materials, it has the characteristics of absorbing and adjusting expansion. When the boiler heats up and expands, it can effectively absorb the amount of expansion and can follow the leakage. The part expands and expands instead of rigidly restraining the expansion, which inevitably solves the problem of boiler air leakage and ash leakage, and achieves the purpose of the present invention.