Sintering flue gas treatment device with simultaneous desulfurization and denitrification

Abstract

The invention discloses a sintering flue gas treatment device for simultaneous desulfurization and denitrification, comprising an active coke adsorption tower and an active coke regeneration tower. The inlet of the tower is communicated through the feeding device, and the adsorption tower is provided with a smoke inlet and a smoke outlet; the tower body is provided with three working positions from top to bottom, namely the buffer position, the reaction position and the discharge position, and the smoke inlet It is located between the discharge position and the reaction position; the smoke exhaust port is located between the buffer position and the reaction position. The activated coke adsorption tower includes a tower body, and the tower body is provided with three bearing bins for carrying active coke, and the bearing bins are square trough type. , The bottom of the bearing bin is a ventilated net; the bearing bin is cyclically displaced in the buffer position, the reaction position and the discharge position under the action of the driving device.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a sintering flue gas treatment device for simultaneous desulfurization and denitrification. Background technique [0002] Sintering is the largest source of SO2 and NOx in the iron and steel smelting process. About 51% to 62% of SO2 and 48% of NOx come from the sintering process. Therefore, the most important process of sintering flue gas treatment is the process of desulfurization and denitrification. In order to save process time and floor space, the desulfurization and denitrification technology has been maturely applied to the sintering flue gas treatment technology. The existing simultaneous desulfurization and denitrification is divided into dry desulfurization and denitrification and wet desulfurization and denitrification. sent to the desulfurization and denitrification tower. [0003] Activated coke desulfurization and denitrification is a ...

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Problems solved by technology

The disadvantage of this structure is: the residence time of active coke in the adsorption tower is generally 5 to 7 days, the volume of the adsorption tower is large, and the amount of activated coke filled in the tower is large. When the adsorption tower is filled every time, the material is fed into the tower from the top The top, the discharge method is also that the active coke falls to the discharge bin to discharge the material. Since the adsorption tower is 20-30 meters high, the height of the active coke is about 10m, and the diameter of the active coke is about 9mm. Most of them are cylindrical and the strength is not high. Such a filler The method and discharge method will cause a certain amount of active coke to be broken, which will lead to a decrease in the strength of the active coke and affect the recycling of the active coke

When the activated coke is broken, more coke powder is produced, which may increase the particle content in the flue gas

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