Simultaneous sintering and desulphurization and denitration system, and desulphurization and denitration method

Abstract

The invention discloses a simultaneous sintering and desulphurization and denitration system. The system comprises a sintering machine, a bellows, an electrostatic precipitator, a main exhaust fan and a chimney which are connected through a flue gas main pipeline. A branched pipeline is led out from an SO2 and NOx high-concentration-region bellows outlet pipeline, and is adopted as a sintering flue gas circulation pipeline. With the sintering flue gas circulation pipeline, a circulation flue gas flapper valve, a precipitator, a natural gas inlet valve connected to an outer gas inlet pipe, a circulation fan, and circulation flue gas mask are sequentially connected. The flue gas mask is covered on a sintering material layer right above the SO2 and NOx high-concentration-region bellows. A sprayer is arranged between a sintering grate-layer material system and a sintering material feeding system of the sintering machine. A residual ammonia water solution tank is connected with the sprayer. The cost of the system and the method are low. With the method and the system, discharge concentration of SO2 and NOx in sintering flue gas can be effectively reduced, and desulphurization and denitration can be simultaneously carried out during the sintering process. Therefore, environment pollution caused by sintering flue gas can be reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection of metallurgical sintering flue gas desulfurization and denitrification, and in particular relates to a simultaneous desulfurization and denitrification system and a desulfurization and denitrification method in the sintering process. Background technique [0002] SO 2 and NO x It has caused great harm to human health and the living environment of humans, and is also the main cause of acid rain. In the "Twelfth Five-Year Plan", it is emphasized that the adherence to SO 2 The continuous control of nitrogen oxides (NO x ) for full control. In the "Twelfth Five-Year Plan" basic idea of ​​the total control of nitrogen oxides, it is proposed that the iron and steel industry is also an important source of nitrogen oxide emissions. In order to expand the field of nitrogen oxide emission reduction and promote the continuous reduction of nitrogen oxide emissions, During the period, th...

AI Technical Summary

Problems solved by technology

makes the method unacceptable

[0006] To sum up, the current desulfurization and denitrification methods in the sintering process, some of which are expensive, and some will affect the normal production of sintering, are difficult to apply in sintering

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