A Venturi rod layer with non-uniform rod spacing

Abstract

The invention discloses a Venturi rod layer with non-uniform rod distances. The Venturi rod layer is characterized in that: the Venturi rod layer comprises at least more than one non-uniformly distributed corrosion-resisting metal or nonmetal solid rod or hollow pipe assembly, and the distance among the rod assembly or the pipe assembly is determined by the gas flow distribution in the zone where the rod assembly or the pipe assembly are installed. The Venturi rod layer is disposed between a gas feeding section of a spraying tower and a first spraying device and / or in a gas adsorption section. The Venturi rod layer provided by the invention can give better play to the Venturi effect generated when gas flows through converging-diverging paths among rods, and therefore (1) "homogenization" adjustment of gas bias current in the gas feeding section of the spraying tower and / or low-gas-velocity distribution of the high side wall in the center of the tower are achieved so that the gas flowing through the rod layer approximates to "plug flow", thus increasing the gas-liquid contacting efficiency; (2) a highly-turbulent liquid thin layer is formed on the surface of the rod layer so that efficient bubbling mass transfer of "gas in liquid" can be achieved when the gas is flowing through the rod layer zone, thus significantly increasing the mass transfer efficiency; and (3) "self-cleaning" of the rods can be achieved by high-speed washing and turbulence of gas flow among rod gaps.

Description

technical field [0001] The patent of the present invention relates to wet flue gas pollutant purification technology, in particular to a gas-liquid contact mass transfer technology for wet flue gas desulfurization, dust removal and other harmful substance removal in spray towers. Background technique [0002] Wet flue gas scrubbing and absorption is currently the most practical and effective technology for industrial flue gas desulfurization, dust removal and denitrification, and it is also the most widely used. Common processes include limestone / gypsum method, double alkali method, magnesium method, ammonia method, etc. After years of extensive research and application development, its process technology has become mature, and a variety of technologies to improve absorption efficiency (ie desulfurization efficiency, dust removal efficiency) have been developed, and it is no longer technically necessary to meet the increasingly stringent environmental protection regulations ...

AI Technical Summary

Problems solved by technology

However, the unequal-spaced ring-shaped Venturi rod layers cannot match the flue gas distribution characteristics in the tower (biased flow in the intake section, high gas velocity center and low side walls in the fully developed section), and the concentric rings that are sparse inside and dense outside will make the smoke The gas converges to the center of the tower; the manufacture of the ring is not as simple as a straight rod

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