Integrated desulfurization and denitrification system for activated carbon

Abstract

The invention discloses an integrated desulfurization and denitrification system for activated carbon. The integrated desulfurization and denitrification system comprises a booster fan, an adsorption tower, an activated carbon conveying device, an activated carbon desorption tower, an ammonia water supply device, an acid making device and a chimney which are connected in sequence, wherein a spiral conveying channel for activated carbon is arranged in the adsorption tower and is vertically arranged; a transverse smoke inlet channel communicating with the spiral conveying channel is arranged on one side of the adsorption tower; a transverse smoke exhaust channel communicating with the spiral conveying channel is arranged on the other side of the adsorption tower; the transverse smoke inlet channel is connected with the booster fan through a pipeline; the transverse smoke exhaust channel is connected with the chimney through a pipeline; and an ammonia gas conveying pipeline communicating with the spiral conveying channel is also arranged at the middle upper part of one side of the adsorption tower. According to the integrated desulfurization and denitrification system for activated carbon, activated carbon can fall at a constant speed in the absorption tower, time for absorption between the activated carbon and flue gas can be prolonged, a contact area between the activated carbon and flue gas is increased, and the overall height of the absorption tower can be reduced.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization and denitrification, in particular to an activated carbon integrated desulfurization and denitrification system. Background technique [0002] For industrial flue gas, especially for sintering machine flue gas in the iron and steel industry, flue gas desulfurization and denitrification technology is a flue gas purification technology applied to the chemical industry where multiple nitrogen oxides and sulfur oxides are generated. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. Most of flue gas simultaneous desulfurization and denitrification technologies are currently in the research and industrial demonstration stage, but because it can simultaneously achieve desulfurization and denitrification in one system, especially with the X Control standards are becoming increasingly stringent, and desulfurization and denitrification technologies are receivi...

AI Technical Summary

Problems solved by technology

However, since the activated carbon in the absorption tower adopts a vertical falling method to absorb SO in the flue gas 2 and NO X , so that the contact time period between the activated carbon and the flue gas is limited, and the contact area is limited. If the flue gas and the activated carbon are fully contacted, the SO in the flue gas can be absorbed 2 and NO X Therefore, the absorption tower must be built very high, but since the activated carbon is in the form of free fall and accelerates downward in the absorption tower, no matter how high the absorption tower is built, it is difficult to prolong or control the contact time between the activated carbon and the delay.

At present, the method of controlling the falling time of activated carbon is widely used, and most of them use the outlet of activated carbon to make a shrinking funnel structure, but this structure can easily cause the problem of blockage of activated carbon at the outlet.

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