Inner wall cleaning device for steam jet pump

Abstract

The invention discloses an inner wall cleaning device for a steam jet pump. The jet pump is arranged in a molten steel vacuum processor; the molten steel vacuum processor is communicated with an exhaust hole of a vacuum tank by a vacuum pipeline; along the vacuum exhaust direction, the jet pump comprises a first level jet pump, a second level jet pump and a third level jet pump; the pipeline of the motel steel vacuum processor is provided with a cleaning spraying mechanism. By adopting the technical scheme, under the condition of a limited site position, the invention provides the cleaning device for accumulated dust on the inner wall of the steam jet pump and solves the difficulties in the prior art; each cleaning point is controlled to start spraying and cleaning according to solenoid valves, an automatic water gun sprays water to clean a pipeline wall, the worker labor intensity is relieved, and the vacuum effect of molten steel is ensured; a nozzle positioned under a pump body is enabled not to be blocked; sewage generated by spraying and cleaning is drained as an drain pipe is arranged under the pump body.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry production equipment. Involves steelmaking equipment structure. More specifically, the present invention relates to a device for cleaning the inner wall of a steam jet pump. Background technique [0002] At present, in the process of steelmaking, in order to reduce the gas content in molten steel, it is necessary to carry out vacuum treatment on molten steel, and the most commonly used equipment for vacuuming is steam jet pump. [0003] Such as figure 1 Shown is the schematic diagram of the steam jet pump vacuuming. The ladle 7 is arranged in the vacuum tank 8, and the vacuum tank 8 is provided with a vent hole 9, and the vent hole 9 is connected with the jet pump 10 through a pipeline, and the first, second and third jet pumps are arranged respectively according to the order of the pipeline. [0004] After the steam with a pressure greater than 0.8MPa passes through the Laval n...

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Problems solved by technology

[0004] After the steam with a pressure greater than 0.8MPa passes through the Laval nozzle, a negative pressure is generated in the mixing chamber, and the furnace gas is sucked into the pump body, but when the exhaust gas passes through the jet pump, the slag in the exhaust gas will be adsorbed on the inner wall of the jet vacuum pump, causing too much ash The geometric shape of the inner wall of the jet pump is changed, resulting in a decrease in the working performance of the vacuum pump, and the vacuum degree in the vacuum tank cannot meet the requirements. At this time, the inner wall needs to be cleaned regularly

[0005] In the prior art, manual dust removal is used to clean the slag and dust on the inner wall. The operator drills into the vacuum pump pipe through the manhole. Because the pipe is narrow, this method has high labor intensity, slow dust removal speed and poor safety, and the pipe is the thinnest. Throat parts cannot be reached by personnel, and the cleaning effect is not satisfactory

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