Desulfurization reaction tower and flue gas desulfurization device

Abstract

The embodiment of the invention provides a desulfurization reaction tower and a flue gas desulfurization device. The desulfurization reaction tower comprises a flue gas inlet, a flue gas outlet and atower body arranged between the flue gas inlet and the flue gas outlet, wherein the tower body is sequentially provided with a material spraying area, a mixing area and a reaction area along a first direction, and the first direction is a direction from a flue gas inlet to a flue gas outlet; the material spraying area is provided with an absorbent spraying mechanism and a first humidifying water spraying mechanism; and a second humidifying water spraying mechanism is arranged in the reaction area. According to the technical scheme provided by the invention, the absorbent spraying mechanism andthe at least two humidifying water spraying mechanisms are arranged in sections, the sulfur dioxide in the flue gas is gradually and fully subjected to desulfurization reaction with the absorbent, the desulfurization efficiency is favorably improved, the concentration of pollutants in the flue gas is gradually reduced in the gradual reaction process, and the pressure loss of the system is favorably reduced by controlling the gas-solid content of different regions.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a desulfurization reaction tower and a flue gas desulfurization device. Background technique [0002] The sulfur dioxide produced by electrolysis flue gas in the aluminum industry has the characteristics of low concentration and low flue gas temperature. The use of traditional limestone wet desulfurization technology or circulating fluidized bed semi-dry desulfurization technology has problems of high investment and operation costs, and the cycle Fluidized bed technology also has engineering problems such as large pressure loss and easy bed collapse, which affect the actual engineering application. However, the conventional bedless semi-dry technology has the problems of poor gas-solid mass transfer in the tower and low desulfurization efficiency. Therefore, there is an urgent need for an advanced process technology that can meet the ultra-low emission requirements, has low ...

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Problems solved by technology

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a desulfurization reaction tower and a flue gas desulfurization device to solve the problems of high cost, large pressure loss or low desulfurization efficiency in the current desulfurization technology used to treat electrolytic flue gas in the aluminum industry The problem

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