Novel heat recovery coke oven riser bridge pipe lining and local repairing method thereof

Abstract

The invention relates to a novel heat recovery coke oven riser bridge pipe lining and a local repairing method thereof, belonging to the field of a heat recovery coke oven and solving the problems that an iron plate at the damaged part is cut off, and directly repaired by a castable, thus the structural strength is low and the lasting time is short. The novel heat recovery coke oven riser bridge pipe lining is characterized in that a steel reinforcement network is arranged in the castable. The local repairing method for burnt castable comprises the steps of: completely closing suction regulating bricks at the damaged side through a fire regulation worker, cutting off the burnt part on the side wall of the riser bridge pipe through gas cutting equipment, cleaning the residual burnt castable, additionally installing the reinforcement network in the castable-poured lining, placing the reinforcement network at the position which is used for constructing the castable, constructing the damaged part with the castable so that the reinforcement network is positioned in the middle of the castable, and leaving a 25mm gap between the outer side of the castable and the inner side of the side wall; constructing the castable into a wall along with the reinforcement network, leveling a wall surface, paving a heat-insulation plate at the gap, welding the cut iron plate back to the original position, and coating asphalt paint. According to the novel heat recovery coke oven riser bridge pipe lining and the local repairing method thereof, the strength of the castable is greatly enhanced, and the service life of the repaired riser bridge pipe is prolonged.

Description

technical field [0001] The invention belongs to the technical field of heat recovery coke ovens, and in particular relates to a new heat recovery coke oven ascending bridge tube lining and a local repair method thereof. Background technique [0002] The heat recovery coke oven is operated under negative pressure during the production process. The high-temperature exhaust gas burned in the coke oven is introduced into the ascending bridge tube through the ascending flue on the main wall, and then collected in the gas collecting pipe and enters the waste heat boiler to convert power generation. The interior is built with castables. After a long period of actual operation, the castables on both sides of the ascending bridge tube have fallen off and the surface has been burned to varying degrees, resulting in local high temperature of the ascending bridge tube, blockage of the ascending fire channel, coke oven machine, coke, etc. The side temperature and suction are unbalanced, ...

AI Technical Summary

Problems solved by technology

[0002] The heat recovery coke oven is operated under negative pressure during the production process. The high-temperature exhaust gas burned in the coke oven is introduced into the ascending bridge tube through the ascending flue channel on the main wall, and then collected in the gas collecting pipe and enters the waste heat boiler to convert power generation. The interior is built with castables. After a long period of actual operation, the castables on both sides of the ascending bridge tube have fallen off and the surface has been burned to varying degrees, resulting in local high temperature of the ascending bridge tube, blockage of the ascending fire channel, coke oven machine, coke, etc. The side temperature and suction are unbalanced, and at the same time, it has a negative impact on the effectiveness of waste heat utilization; in the existing technology, the outer iron plate of the damaged part is cut off and directly repaired with castables when the coke oven is not in production, and the structural strength is relatively high. low, shorter duration

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