Improved downgoing type circular seam Venturi tube

Abstract

The invention relates to the technical field of dust removal devices in the iron and steel industry and provides an improved downgoing type circular seam Venturi tube. The improved downgoing type circular seam Venturi tube comprises a shell, a water inlet pipe and a regulating mechanism, wherein the shell is provided with an inlet section, a throat port, an expanding section and an outlet section which are sequentially connected through flanges, and the inlet section is provided with a water inlet pipe short joint portion; the water inlet pipe is connected with the water inlet pipe short joint portion through a flange and provided with a water outlet end, and a spiral nozzle is arranged at the water outlet end; the regulating mechanism is provided with a pull rod, a connection sleeve, a connection claw, a weight and a bottom guide rod; the spiral nozzle is located in the space defined by the connection claw, and the central axis of the spiral nozzle coincides with the central axis of the regulating mechanism; the regulating mechanism is located inside the shell, and the central axis of the regulating mechanism coincides with the central axis of the shell. By means of the improved downgoing type circular seam Venturi tube, the flue gas purifying efficiency can be improved, the flue gas emission concentration can be reduced, and the tube is suitable for a one-time flue gas wet dust collection system of a converter.

Description

technical field [0001] The invention relates to the field of dust removal in the iron and steel industry, in particular to fine dust removal equipment in a converter flue gas dust removal device. Background technique [0002] Released on 2012-06-27 and implemented on 2012-10-01, the "Steelmaking Industry Air Pollutant Emission Standard" (GB28664-2012) stipulates that existing enterprises shall be from October 1, 2012 to December 31, 2014 implementation of the air pollutant emission concentration limit of 100mg / m 3 . Since January 1, 2015, the emission concentration limit of air pollutants has been implemented at 50mg / m 3 . And from October 1, 2012, new converters will implement the air pollutant emission concentration limit of 50mg / m 3 standard. Some key areas require 30mg / m 3 . [0003] According to the above requirements, the dust removal operation is carried out for the air pollutants such as flue gas emitted by the steelmaking industry. The dust removal process i...

AI Technical Summary

Problems solved by technology

As a result, it is impossible to arrange a nozzle in the center of the downward circular seam venturi tube, and it is necessary to use 3 to 5 small nozzles 3 evenly arranged, which will inevitably overlap the water curtain at the center during water supply, resulting in uneven water distribution and affecting dust removal Effect; the second is that the big end of the weight is located at the upper part, and the small end is connected with the tie rod at the lower part. Contrary to the first form, although a nozzle on the upper part of the weight can be guaranteed to supply water, but the tie rod is located at the bottom, the sealing device cannot be reliably sealed. There is water leakage at the bottom of the equipment, and the hydraulic servo device is under pressure for a long time, which cannot guarantee the reliable operation of the hydraulic cylinder

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