Method for repairing inter-leakage of silicon carbide brick walls of coke oven regenerative chamber in production

Abstract

The invention discloses a method for repairing inter-leakage of silicon carbide brick walls of a coke oven regenerative chamber in production. The method is characterized by including the steps of accurately positioning and selecting medium term and later period of coking of a coking chamber; repairing by firstly blocking coal gas branch pipes correspondingly , feeding compressed air to observe leakage position of the inter-leakage silicon carbide brick walls, sealing through orifices of orifice plates on the coal gas branch pipes via blind plates, and changing a hole-plate case into an-orifice plate case with the orifice 38mm in diameter; changing burned-out silicon carbide bricks at the inter-leakage position; spraying refractories; and recovering coal gas for heating of a combustion chamber, thereby completing repairing of the inter-leakage position of the silicon carbide brick walls of the regenerative chamber. The method can be implemented during production, is easy to operate, is stable and reliable, needs short time for repairing, and is particularly applicable to repairing of silicon carbide brick walls of the regenerative chamber in production, and further has the advantages of reducing labor intensity and improving production efficiency greatly and more importantly, protecting oven bricks effectively.

Description

technical field [0001] The invention relates to an improvement of a coke oven repair process, in particular to a method for repairing series leakage of silicon carbide brick walls in coke oven regenerators during the production process. Background technique [0002] The coke oven is a furnace made of refractory bricks and refractory blocks, including a furnace head 1, a combustion chamber 2, a carbonization chamber 3, and a regenerator 4, and is connected with a chimney through a flue; the regenerator 4 includes Regenerator sealing wall 41, lattice brick 42, gas branch pipe 8, gas branch pipe 8 are arranged side by side with the first to the seventh, and the bottom of each gas branch pipe 8 is provided with small orifice plate 14, and the lower end of gas branch pipe 8 is Connected with the gas horizontal pipe 5, the two sides of the gas branch pipe 8 are regenerator sealing walls 41 and checker bricks 42, and the upper end of each gas branch pipe 8 is provided with a silico...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that: since the gunning material is only attached to the surface of the wall at the leak, the combination is not strong enough, so after the furnace wall is gunned, the maintenance time is very short, and repeated gunning is required, which affects production

[0003] According to the search, there are currently reports on coke oven repair, such as Chinese patent 201110227378.1, which discloses "a coke oven body repair process", which includes making continuous grouting holes at the joints of leaking bricks, and spraying refractory mud into the grouting holes Internally, through high-pressure grouting, this process, because the leakage is perforated and grouted, the repair material is not easy to fall off, and the service time is prolonged. However, because the carbonized silicon brick wall of the regenerator is in the lower part of the combustion chamber, the temperature is high. The space is narrow, so this process is not suitable for repairing the leakage of the silicon carbide brick wall of the regenerator

At present, there is no report on the repair process of the silicon carbide brick wall leakage in the regenerator

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