Intra-tower crystallized ammonia-process desulfurization tower

Abstract

The invention provides an intra-tower crystallized ammonia-process desulfurization tower. The intra-tower crystallized ammonia-process desulfurization tower comprises a tower body, an oxidized air pipe, an ammonia water replenishing pipe, a circulating absorption pump, a discharge pump, and a segmenting structure, wherein a tower pool is formed in the internal space of the tower body; the oxidized air pipe is communicated with the internal space of the tower body and can be used for providing air; the ammonia water replenishing pipe provides ammonia water for the tower pool of the tower body; the circulating absorption pump is communicated with the tower pool, pumps out absorption liquid in the tower pool, circularly leads the pumped absorption liquid into the internal space of the tower body, and absorbs sulfur dioxide contained in smoke; the discharge pump is communicated with the bottom of the tower pool; the segmenting structure is positioned in the tower pool and is used for segmenting the tower pool into an oxidization zone and an non-oxidization zone, and the absorption liquid with absorbed sulfur dioxide contained in the smoke flows in the oxidization zone and the non-oxidization zone; and the ammonia water replenishing pipe consists of a first ammonia water replenishing pipe communicated with the oxidization zone, and a second ammonia water replenishing pipe communicated with the non-oxidization zone; the air provided by the oxidized air pipe is led to the oxidization zone; an inlet of the discharge pump is communicated with the oxidization zone; and an inlet of the circulating absorption pump is communicated with the non-oxidization zone. The intra-tower crystallized ammonia-process desulfurization tower can improve the capability of absorbing the sulfur dioxide.

Description

technical field [0001] The invention relates to an ammonia method desulfurization tower, in particular to an absorption liquid circulation structure of an inner crystallization ammonia method desulfurization tower. Background technique [0002] Ammonia-based flue gas desulfurization uses ammonia (ammonia gas, ammonia water or ammonium bicarbonate) as an absorbent to remove sulfur dioxide from boiler flue gas (or steel plant sintering machine flue gas, etc.), and oxidize it into by-products through air ammonium sulfate. The main equipment of ammonia flue gas desulfurization is the desulfurization tower, and the process flow is generally divided into two types: saturated crystallization inside the tower and evaporation crystallization outside the tower. The saturated crystallization process in the tower is mainly that the ammonium sulfate in the tower pool is supersaturated and the crystals are directly precipitated during the absorption liquid circulation absorption process,...

AI Technical Summary

Problems solved by technology

High liquid-to-gas ratio must consume a lot of electricity

At the same time, due to the large amount of ammonium sulfate crystals contained in the circulating fluid, the wear and tear of the circulating pump is serious

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