Water-cooling anti-coking instilling and nitrogen blocking removing device of double-row rare earth gas carburizing furnace

Abstract

The invention provides a water-cooling anti-coking instilling and nitrogen blocking removing device of a double-row rare earth gas carburizing furnace, and relates to a double-row rare earth carburizing furnace instilling device. The invention solves the problems that rare earth methanol, methanol and ethyl acetate or acetone in the traditional instilling tube can be incompletely decomposed when passing through a furnace roof wall heat-insulating layer (temperature is more than or equal to 560 DEG C), thus massive carbon black and coking materials can be generated, the instilling tube is easy to be blocked, carburizing atmosphere in hearth can be destroyed during cleaning, carburizing quality of a gear is seriously influenced, and carburizing medium is easy to leak. The water-cooling anti-coking instilling and nitrogen blocking removing device provided by the invention comprises a water-cooling anti-coking instilling device and a nitrogen blowing and blocking removing device. The device provided by the invention has the advantages that: the carburizing medium is ensured to smoothly enter the hearth, energy is saved, and quality of product is improved; labour intensity of workers is alleviated, workshop environment is optimized, defect of leakage of the carburizing medium is eliminated, and consumption of the carburizing medium is reduced.

Description

technical field [0001] The invention relates to a dripping device for a double-row rare earth continuous gas carburizing furnace, in particular to a water cooling anti-coking dripping device for a double row rare earth gas carburizing furnace and a nitrogen gas declogging device. Background technique [0002] At present, the dripping pipe of the double-row carburizing furnace is made of a Φ34mm×3mm, 0Cr25Ni20Si2 heat-resistant and non-skinning steel pipe. When the temperature in the insulation layer of the furnace roof arch wall is ≥560°C, rare earth methanol, methanol and ethyl acetate (acetone) (hereinafter referred to as carburizing medium) will undergo incomplete decomposition reactions when passing through this temperature zone, and a large amount of carbon black and coking will be generated. It is easy to block the drip pipe, making it difficult to carry out the carburizing process. At this time, the operator has to climb on the furnace top and use an iron drill to dre...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the carburizing medium in the existing drip tube passes through the roof arch wall insulation layer (≥560°C temperature), incomplete decomposition reaction will occur, and a large amount of carbon black and coke will be generated, which will easily block the drip tube and increase the The labor intensity of the operator is reduced, and what is more serious is that when the workers dredge the drip tube, the surrounding air enters the furnace through the open drip tube, which destroys the carburizing atmosphere of the furnace and seriously affects the carburizing quality of the gear. At the same time, it is also easy to cause leakage of carburizing media

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