Vacuum refining waste gas treatment system and vacuum refining waste gas treatment method

Abstract

The invention provides a vacuum refining waste gas treatment system and a vacuum refining waste gas treatment method. The vacuum refining waste gas treatment system comprises a first-stage gas cooling dust remover (1), a pipeline (2), a second-stage gas cooling dust remover (4), a dust removal filter group (5) and a vacuum pump group (6) which are sequentially connected in series. According to the vacuum refining waste gas treatment system and the vacuum refining waste gas treatment method, through rough dust removal of the first-stage gas cooling dust remover and the second-stage gas cooling dust remover and fine dust removal of the dust removal filter, any dust and impurities can be prevented from entering the mechanical vacuum pump, and the vacuum pump is protected to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of molten steel refining, in particular to a vacuum refining exhaust gas treatment system and a vacuum refining exhaust gas treatment method. Background technique [0002] Mechanical vacuum pump systems are generally used in RH (vacuum cycle degassing), VD (vacuum degassing), VOD (vacuum oxygen blowing degassing) and other process equipment for molten steel refining. Compared with traditional steam vacuum pump systems, mechanical vacuum pump systems have energy saving, Environmental protection and other advantages, with the implementation of the national carbon emission policy in recent years, its application proportion in vacuum refining has been increasing, and it is gradually replacing the steam vacuum pump system. [0003] During the vacuum refining process of molten steel, molten steel undergoes chemical and physical reactions in an airtight vacuum container, and more high-temperature flue gas is genera...

AI Technical Summary

Problems solved by technology

[0004] The mechanical vacuum pump generates a vacuum by compressing the gas. Due to the principle of vacuuming, the temperature and dust content of the gas are very strict. Once the temperature exceeds the required range, the rotor will expand and the cavity will be stuck, resulting in accidents such as shutdown or equipment damage. If the dust content exceeds the required range, it will also cause increased wear of the rotor or cavity, and in severe cases, the rotor and cavity will be stuck

At the same time, the high exhaust gas temperature will also affect the compression efficiency of the mechanical vacuum pump and affect the vacuuming effect.

[0005] There are also relevant domestic patents that use a two-stage gas cooler + bag dust filter to treat exhaust gas. Although the inlet temperature of the mechanical vacuum pump can be reduced to below 60°C, it cannot solve the problem of rising gas temperature caused by the compression of the mechanical vacuum pump. ; For fine dust removal, there is only a bag filter, once the bag is damaged, there is a risk of dust entering the mechanical vacuum pump

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