Desulphurization dedusting integrated half-dry type swirl desulfurization tower

Abstract

A desulphurization dedusting integrated half-dry type swirl desulfurization tower is disclosed. By arranging a tangential-direction air inlet structure, the flue gas in the desulfurization tower forms a rotating flow, the turbulent flow strength is enhanced, the sulfur-containing dust-containing flue gas is fully contacted with a desulphurization agent particle, bumping and friction among particles and between the particle and the tower wall are enhanced, desulphurization efficiency is improved, and wall adhesion and fouling phenomena are avoided. By employing the desulphurization dedusting integrated design, arranging a canopy structure and utilizing the tower wall to separate a desulphurization reaction chamber, an annular gas-solid separation chamber and a circulation ash feedback channel, the occupied space of a routine desulphurization tower and externally-arranged cyclone separator and feedback device, and the disclosed desulphurization tower is compact in structure and convenient to install.

Description

technical field [0001] The invention relates to flue gas desulfurization equipment, in particular to circulating fluidized bed semi-dry flue gas desulfurization technology. In the present invention, by setting a tangential flue gas inlet structure, the flue gas in the desulfurization tower forms a swirling flow to enhance the turbulence intensity, and the desulfurizer is sprayed from the center, so that the sulfur-containing flue gas and the desulfurizer particles are fully contacted, and the inter-particle and particle-to-grain interactions are enhanced. Collision and friction between the tower walls improve the desulfurization efficiency and prevent wall sticking and scaling; at the same time, the desulfurization and dust removal integrated design is adopted, the umbrella cover structure is set, and the desulfurization reaction chamber, the annular gas-solid separation chamber and the circulating ash are separated by the tower wall The return channel can effectively reduce t...

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Problems solved by technology

[0015] The present invention is to build a rotating flow field in the desulfurization tower to realize the full mixing and contact of the flue gas. The bottom of the desulfurization tower adopts a tangential air intake structure, and the homogeneous reaction process in the desulfurization tower is changed to a heterogeneous reaction process. The purpose is to Improve the problem of low shear force and low turbulence intensity in the flow field in the desulfurization tower, enhance the mixing of sulfur-containing dust-containing flue gas and desulfurization agent, strengthen the desulfurization reaction process in the tower, and improve the utilization rate of desulfurization agent

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