Method for online repair of regenerative burner nozzle of heating furnace

Abstract

The invention discloses a method for online repair of a regenerative burner nozzle of a heating furnace and belongs to the technical field of heating furnace maintenance. The method is used for online repair of the damaged regenerative burner nozzle of the heating furnace. According to the technical scheme, the shape and angle of the burner nozzle are designed according to the heating capacity of a regenerative burner; meanwhile, a burner internal mold provided with reinforcing ribs is arranged, an old nozzle of the heating furnace and a peripheral furnace wall are dismantled when the heating furnace is blown out, the burner internal mold is placed in the furnace wall, an external mold is erected on the outer side of the furnace wall, a discharging port is formed in the top of the external mold, and micro-expansion refractory castable is adopted for pouring; after demolding, the heating furnace can be used after being dried normally. By the adoption of the method, the damaged regenerative burner nozzle of the heating furnace can be repaired quickly, all furnace walls of the heating furnace do not need to be dismantled, heating furnace maintenance time is shortened, and the construction cost of the heating furnace is reduced; meanwhile, the heating capacity of the regenerative burner of the heating furnace can be adjusted, so that the heating furnace supplies heat more balanced and reasonable, and the heating capacity and temperature uniformity of the heating furnace are improved.

Description

technical field [0001] The invention relates to an online repair method for a regenerative burner nozzle used on a heating furnace, and belongs to the technical field of heating furnace maintenance technology. Background technique [0002] In metallurgical enterprises, the regenerative combustion technology of the heating furnace has been widely used. The characteristic of this technology is to preheat the air and gas to above 1000 ℃ for combustion, and reduce the flue gas to be discharged below 150 ℃, so that the combustion efficiency of the heating furnace can be improved. be improved, so as to realize the limit recovery of flue gas waste heat. [0003] In order to ensure the safety of the combustion process, the regenerative combustion technology generally adopts the external mixed combustion method, that is, after the air or gas is stored in the respective regenerative burners, it passes through the nozzles set on the burner bricks at a certain angle. And the speed is s...

AI Technical Summary

Problems solved by technology

In this way, the furnace wall, burner bricks, and even the steel structure of the heating furnace must be completely removed, and then new burner bricks or burner nozzle molds must be set up, and the furnace wall should be molded and poured. This process is the largest The disadvantage is that during the overhaul construction, the furnace wall of the heating furnace needs to be removed and re-constructed, which will increase the maintenance cost of the heating furnace and prolong the maintenance period of the heating furnace

[0008] So far, the problem of repairing the burner nozzle of the regenerative heating furnace has not been effectively solved, which directly affects the use efficiency of the heating furnace, and has become a difficult problem in the maintenance of the heating furnace, which needs to be solved urgently

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