Venturi tube used in plate type absorption tower

Abstract

The invention relates to the field of desulfurization and denitrification devices and discloses a Venturi tube used in a plate type absorption tower. The Venturi tube comprises a Venturi tube body, wherein the Venturi tube body comprises a gas inlet section, a shrinkage section, a diffusion section and an exhaust section which are mutually connected in sequence from left to right; the gas inlet end of the gas inlet section is connected with the gas outlet end of a flue gas conveying pipeline; the shrinkage section comprises an atomization cavity of a flat spherical cavity structure; a plurality of spray guns are uniformly mounted on the outer side of the atomization cavity; and one end of eachspray gun penetrates through the atomization cavity and extends to the inner wall side of the atomization cavity. A liquid fed into the atomization cavity is instantaneously atomized through an impeller which is driven by high-speed air flows, and the atomized liquid is directly sufficiently mixedwith flue gas inside the atomization cavity along with stirring of the impeller, so that compared with conventional co-spraying of liquids and flue gas, atomization of the liquid of the technical scheme is rapid, the atomizedliquid can be sufficiently mixed with the flue gas, and in addition, the contact time of the atomized liquid with the flue gas is long.

Description

technical field [0001] The invention relates to the field of desulfurization and denitrification devices, in particular to a venturi tube applied to a plate absorption tower. Background technique [0002] Sintering is an important process in modern iron and steel enterprises. It is the basis for high-quality and high-yield blast furnace smelting and plays an important role in the production of iron and steel. Compared with the flue gas produced by other industrial furnaces, the steel sintering flue gas has the characteristics of large flue gas volume, more dust, high moisture content, strong corrosion and large changes in SO2 and NOX concentrations. Venturi tubes are widely used in desulfurization and denitrification devices because they can disperse liquid in the gas phase in the form of droplets. If the contact time after melting is short, the absorption of flue gas by the scrubbing absorbent is not sufficient, and the absorption efficiency of some insoluble or slow react...

AI Technical Summary

Problems solved by technology

The nozzle can just cover the gap between the heavy support and the shrinkage section when spraying water, but under the action of high-speed airflow, the area that can be covered by water spray will only shrink, and it is impossible to cover the heavy support and the contraction section. There is a gap between the sections, and the sprayed liquid cannot form atomization in the contraction section, and the absorption of smoke is still in the diffusion section

Therefore, this technology still has the short time of gas-liquid contact, and the absorption of flue gas by the washing absorbent is not sufficient.

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