Flue gas desulfurization system

Abstract

The invention discloses a flue gas desulfurization system. The flue gas desulfurization system comprises a first-level absorption tower and a second-level absorption tower which are sequentially communicated, wherein a bubbling bed is arranged in the first-level absorption tower, a fast bed is arranged in the second-level absorption tower, and each of the first-level absorption tower and the second-level absorption tower is loaded with powdered activated carbon. The flue gas desulfurization system has the advantages that fluidized bed double-tower absorption using activated carbon as the desulfurization absorbent is adopted, the bubbling bed is used for first-level absorption, sufficient contact time between the activated carbon and flue gas is guaranteed, and the fast bed is used for second-level absorption to deeply purifying the flue gas; the double-tower design can increase the effective utilization rate of outlet absorbent sulfur capacity on the basis that the overall desulfurization efficiency is guaranteed, the absorbent activated carbon participates in the reaction in a powered state, the mechanical loss of the activated carbon is reduced, the overall utilization rate of the activated carbon is increased, and the activated carbon desulfurization energy consumption and activated carbon consumption can be lowered.

Description

technical field [0001] The invention relates to the field of removal of flue gas pollutant sulfur dioxide, in particular to a flue gas desulfurization system. Background technique [0002] Activated carbon desulfurization is a flue gas desulfurization technology that can be used as a resource. At the same time, it also has an obvious removal effect on heavy metals and other pollutants in flue gas, and has broad development and application prospects. [0003] The current activated carbon desulfurization technology is mainly the moving bed adsorption-heating regeneration process route. The activated carbon used in the moving bed adsorption process is a shaped activated carbon with high mechanical strength. In industrial applications, it is generally a columnar activated carbon with a diameter of Φ5-9mm. However, due to the high diffusion resistance in the columnar activated carbon, the utilization rate of the inner surface is low; the crushing and wear during the transportati...

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Problems solved by technology

However, the adsorption process of the fluidized bed has a low effective utilization rate of activated carbon sulfur capacity, resulting in a waste of energy in the regeneration process.

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