Fluidized activated carbon combined desulfurization and denitrification process

Abstract

The invention relates to a fluidized activated carbon combined desulfurization and denitrification process, which comprises the following steps that: flue gas containing SO2 and NOx is mixed with activated carbon in a fluidized state, the temperature of the flue gas is adjusted by temperature-regulating and humidifying water, and SO2 is absorbed, oxidized and removed at the lower part of a circulating fluidized bed reaction tower; ammonia gas is injected into the upper part of the reaction tower and is reacted with NOx in the flue gas to realize the removal of the NOx; the purified flue gas passes through a gas-solid separation device which separates the activated carbon, part of the activated carbon is sent into the circulating fluidized bed reaction tower, and part of the activated carbon flows into a spiral microwave regeneration unit, so that the activated carbon is regenerated to realize the recycling of the activated carbon. The fluidized activated carbon combined desulfurization and denitrification process of the invention realizes the efficient recycling of the activated carbon and improves the reliability of a system.

Description

1. Technical field [0001] The invention belongs to the field of flue gas pollution control, in particular to SO in the flue gas of a coal-fired boiler in a thermal power plant. 2 and NO x Fluidized activated carbon combined with desulfurization and denitrification process. 2. Background technology [0002] Air pollution and acid rain caused by flue gas pollutants discharged from coal-fired power plant boilers have become very serious and have caused huge economic losses. Therefore, it is imperative to control the emission of flue gas pollutants. At present, the single desulfurization or denitrification technology is mostly used in industrial applications. The combined desulfurization and denitrification technology that has been developed and applied is also the flue gas desulfurization technology (Flue Gas Desulfurization, FGD) and the flue gas denitrification technology - Selective Catalytic Reduction (Selective Catalytic Reduction, SCR) combined process has caused proble...

AI Technical Summary

Problems solved by technology

At present, the most widely used activated carbon desulfurization and denitrification process mostly adopts fixed bed or moving bed adsorption process, but the following problems exist in the application process of this process: (1) The heat transfer effect of the bed layer is poor, and the utilization rate of activated carbon is low; (2) The bed layer Excessive resistance leads to high operating costs of the system; (3) poor continuity of system operation and difficulty in replacing activated carbon, which is not conducive to timely regeneration and recycling of activated carbon; (4) complex process equipment and large space occupation, resulting in increased initial investment in equipment and other disadvantages , hindering the popularization and application of activated carbon desulfurization and denitrification technology

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