Vacuum pipeline automatic dust removal system and method of dry vacuum pumping system for molten steel refining

Abstract

The invention discloses an automatic dust cleaning system for the vacuum pipeline of a molten steel refining dry type vacuum-pumping system. The automatic dust cleaning system comprises no less than 1 dust stratification cone bucket on the vacuum pipeline, electric dust cleaning valves arranged at the outlet of each dust stratification cone bucket, a filter and a vacuum-pumping system, wherein each electric dust cleaning valve is orderly connected with the filter and the vacuum-pumping system through a dust cleaning pipeline. The automatic dust cleaning system further comprises a vacuum pressure recovering device arranged on the vacuum pipeline and an automatic control system for controlling the electric dust cleaning valves, the filter and the vacuum-pumping system to work. The invention also discloses an automatic dust cleaning method for the vacuum pipeline of the molten steel refining dry type vacuum-pumping system; the dust cleaning method is capable of realizing dust cleaning by virtue of vacuum and pressure difference. The automatic dust cleaning system and method for the vacuum pipeline of the molten steel refining dry type vacuum-pumping system have the advantages that the dust of the vacuum pipeline is removed by generating negative pressure by using a mechanical vacuum pump, the energy consumption is reduced, maintenance is convenient, the dust cleaning effect is good and the environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the field of cleaning pipeline systems, and in particular relates to an automatic ash cleaning system and method for a vacuum pipeline of a dry-type vacuum pumping system for molten steel refining. Background technique [0002] In the field of metallurgy, during the process of vacuum refining the molten steel outside the furnace, a large amount of dust generated from the molten steel will enter the vacuum pipeline along with the process gas, and it is easy to accumulate in valves, long straight pipe sections, low points of the pipeline, etc. Dust removal methods commonly used in vacuum pipelines include compressed gas purging, high-pressure water flushing, and manual dust removal. [0003] The compressed gas purging method is usually to reserve the purge joint and the ash outlet on the vacuum pipeline at intervals. When cleaning the dust, the compressed gas is introduced to blow the ash to the ash outlet along the flow directio...

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Problems solved by technology

[0003] The compressed gas purging method is usually to reserve the purge joint and the ash outlet on the vacuum pipeline at intervals. When cleaning the dust, the compressed gas is introduced to blow the ash to the ash outlet along the flow direction of the medium. The disadvantages and shortcomings of this method: a. When sweeping, the dust is relatively large at the ash outlet, causing secondary pollution to the environment; b. When the diameter of the vacuum pipe is large, the flow rate of the compressed gas is slow, and the cleaning effect is not good. If the purge joint and the flow rate of the compressed gas are increased, It increases the consumption of media and increases the cost of operation and maintenance.

Disadvantages and deficiencies of this method: a. During ash cleaning, the flushing water and accumulated ash form mud, which is difficult to collect and easily causes secondary pollution to the environment; b. After flushing, the pipeline needs to be purged and dried, which increases maintenance costs and time

Disadvantages and deficiencies of this method: a. The working environment is harsh and the labor intensity of the workers is high; b. Since the operation is in a confined space, and the dust-containing medium is usually toxic and harmful gas, the workers are likely to cause occupational hazards such as suffocation and poisoning

c. In a small vacuum system, due to the small diameter of the vacuum pipe and the small operating space, it is difficult for maintenance personnel to enter and operate.

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