Method for repairing crown brick of large wall of combustion chamber of internal-combustion stove

Abstract

The invention belongs to the technical field of stove repair, in particular to a method for repairing a crown brick of a large wall of a combustion chamber of an internal-combustion stove, which comprises the following steps of: removing the combustion chamber and a checker brick, preserving the large wall, removing the damaged crown brick on the large wall, digging a groove at the damaged part of the crown brick; fixing a crown brick insulation layer in the groove of the large wall by using a high-temperature adhesive to enable the crown brick to be combined with the large wall together; and building a new combustion chamber and a new checker brick and enabling an expansion gap to be formed between the crown brick and the combustion chamber. The invention can improve the effect of locally repairing the stove while the damaged combustion chamber and the damaged checker brick are replaced in the stove, can prolong the service life of the locally repaired stove, and can save the cost and shorten the off-production repair time.

Description

technical field [0001] The invention belongs to the technical field of hot blast stove repair, in particular to a method for repairing a large wall top brick in a combustion chamber of an internal combustion hot blast stove. Background technique [0002] In actual production, the combustion chamber of the internal combustion hot blast stove will gradually tilt towards the center of the hot blast stove due to the alternating action of flue gas and hot air, and the position of the combustion chamber is fixed by the top brick built in the large wall of the hot blast stove. The protruding part where the top brick plays a major role is eroded by long-term unilateral pressure and airflow erosion, and the protruding part is eroded and damaged. The combustion chamber loses the retention function of the top brick, loosens, shifts, cracks and short-circuits, and gradually tilts toward the center of the hot blast stove. Squeeze the checker bricks in the heat storage chamber, deform the...

AI Technical Summary

Problems solved by technology

The protruding part where the top brick plays a major role is eroded by long-term unilateral pressure and airflow erosion, and the protruding part is eroded and damaged. The combustion chamber loses the retention function of the top brick, loosens, shifts, cracks and short-circuits, and gradually tilts toward the center of the hot blast stove. Squeeze the checker bricks in the heat storage chamber, deform the checker bricks, make the air flow channel smaller, and make the use of the hot blast stove worse

Existing methods for repairing the large wall roof bricks of the combustion chamber of the internal combustion type hot blast stove mainly contain the following two types: 1. partial repair, the large wall does not move, and the damaged combustion chamber and checker bricks are replaced. The top brick has not been repaired, and after a short period of time after partial repair, the phenomenon of loosening, shifting, cracking and short circuit of the combustion chamber still occurs

2. Overhaul, replace the damaged combustion chamber and checker bricks, and replace the large wall and the roof bricks built in the large wall at the same time. Although the effect is good, it will cost more than 600,000 yuan to repair a hot blast stove, and it will cost an extra 100,000 yuan. day time