Processing method of gasification furnace quenching ring

Abstract

A processing method of a gasification furnace quenching ring. The invention relates to the processing method of a coal water slurry gasification furnace quenching ring. The processing method includes the steps of: (A) firstly producing an outer ring tube (5), a chamber base (1), a water distribution inner ring (3) and a cylinder body (7) and fixedly connecting the chamber base (1), the water distribution inner ring (3) and the cylinder body (7), wherein a plurality of water distribution holes (8) are formed in the chamber base (1) above the water distribution inner ring (3); (B) spray-coating a hard alloy material onto the inner surface of the outer ring tube (5), the outer surface of the water distribution inner ring (3), and a water outlet on the water distribution inner ring (3) to form spray coating layers; (C) cutting the outer ring tube (5) into at least three parts; and (D) sleeving the water distribution inner ring (3) by the outer ring tube (5) on the inner side in the radial direction and welding the outer ring tube (5) to the inner ring on the chamber base (1). The method improves anti-erosion property and increases service life of the quenching ring, reduces shut down times, overcomes waste of loss of raw materials due to shut down maintenance and change of a new quenching ring in the prior art.

Description

technical field [0001] The invention relates to a processing method for a quenching ring of a coal-water slurry gasification furnace. Background technique [0002] The coal-water slurry gasifier uses all coal as the gasification raw material, and the chilled water is a medium flow containing three phases of gas, liquid, and solid, and its solid suspended matter and turbidity are high, and the liquid phase contains Ca 2+ , Mg 2+ , Cl - , S 2- , CO 3 2- , NH 4 + A variety of ions, such as ions, will cause strong erosion, wear and corrosion damage to the quenching ring. Once the quenching ring leaks, it will lead to slag hanging on the quenching ring, blockage of the slag port of the gasifier or the downcomer, and the pressure of the furnace combustion chamber will increase. , the system could not maintain normal production, and the gasifier was forced to shut down for treatment. At present, the service life of the imported chilling ring is only 5-6 months, which seriou...

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Problems solved by technology

[0002] The coal-water slurry gasifier uses all coal as the raw material for gasification, and the chilled water is a medium flow containing three phases of gas, liquid and solid. Its solid suspended matter and turbidity are high, and the liquid phase contains Ca 2+ , Mg 2+ , Cl - , S 2- , CO 3 2- , NH 4 + A variety of ions, such as ions, will cause strong erosion, wear and corrosion damage to the quenching ring. Once the quenching ring leaks, it will cause slag hanging on the quenching ring, blockage of the gasifier slag port or downcomer, and the pressure of the furnace combustion chamber will increase. , the system could not maintain normal production, and the gasifier was forced to shut down for treatment

At present, the service life of the imported chilling ring is only 5 to 6 months, which seriously affects the continuous production of coal-water slurry gasification, increases the energy consumption and material consumption of the gasification device, and once the chilling ring is damaged, it can only be scrapped and replaced with a new one. The chilling ring needs 500,000 yuan, which seriously reduces the economic benefits and production costs of the enterprise

According to the research of the disintegration of a large number of old chilling rings after use, the inventors have shown that the erosion damage part is mainly manifested as the erosion and leakage of the outer ring pipe from the inner wall; the erosion of the outlet of the water distribution hole becomes larger; the erosion of the outer wall of the water distribution inner ring Grooves, which eventually lead to chiller ring failure due to leakage or uneven water distribution

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