Method for repairing chilling ring of gasifier

Abstract

The invention relates to a technique of repairing a chilling ring of a waste coal water slurry gasifier. The method for repairing the chilling ring of the gasifier comprises the steps that an original outer ring tube is cut down from the inner ring of a cavity base; lathe turning is carried out on a water outlet of a water distribution hole on the inner ring of the cavity base, impurities on the lathe turning surface are removed by abrasive blasting, a thickness removed by the lathe turning is made up by spray welding, and a new water distribution hole is drilled in the inner ring of the cavity base; impurities on washed parts of the outer surface of a water distribution inner ring are removed by the abrasive blasting, and an original size of the water distribution inner ring is recovered through processing and polishing after the spray welding; and a new outer ring tube is fabricated, the outer ring tube is cut into at least three sections which are butt jointed and positioned and fixed to the inner ring of the cavity base, and the outer ring tube is welded on the inner ring of the cavity base. The waste chilling ring is repaired, so an expensive fee for replacing a new chilling ring is saved, production cost of an enterprise is saved, and waste reutilization is realized.

Description

technical field [0001] The invention relates to a repair technology for the chilling ring of a waste coal-water slurry gasifier. Background technique [0002] The quenching ring of the gasifier is processed by solid solution high-strength materials and assembled by welding as a whole. At present, there is no repair technology for the old quenching ring. Generally, the quenching ring will occur after 5 to 6 months of operation. Leakage, the current treatment method is the overall update, replacing the old chiller ring cannot be repaired, and it will be scrapped. The material of the chilling ring has good resistance to stress corrosion cracking, pitting corrosion and crevice corrosion, oxidation resistance and non-oxidizing hot acid performance, and good wear resistance, but it is expensive and the manufacturing cost is 500,000 yuan. Scrapping causes a very large waste. Since the erosion damage of the old chiller rings is concentrated in a small area, the inventors have shown...

AI Technical Summary

Problems solved by technology

[0002] The quenching ring of the gasifier is processed by solid solution high-strength materials and assembled by welding as a whole. At present, there is no repair technology for the old quenching ring. Generally, the quenching ring will occur after 5 to 6 months of operation. Leakage, the current treatment method is the overall update, replacing the old chiller ring cannot be repaired, and it will be scrapped

The material of the chilling ring has good resistance to stress corrosion cracking, pitting corrosion and crevice corrosion, oxidation resistance and non-oxidizing hot acid performance, and good wear resistance, but it is expensive and the manufacturing cost is 500,000 yuan. Scrapping causes a very large waste. Since the erosion damage of the old chiller rings is concentrated in a small area, the inventors have shown that the erosion damage of the old chiller rings is mainly manifested in the form of The outer ring pipe is eroded and leaked from the inner wall; the erosion of the outlet of the water distribution hole becomes larger; the outer wall of the water distribution inner ring is eroded into the groove, which eventually leads to leakage of the chilling ring or uneven water distribution and failure

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