Cement kiln medium-temperature medium-dust SCR denitration reaction tower

Abstract

The invention discloses a cement kiln medium-temperature medium-dust SCR denitration reaction tower which comprises a tower body, an air inlet pipe is arranged at the top of the tower body, an ash hopper is arranged at the bottom of the tower body, and an air outlet pipe is arranged on the side face of the ash hopper; and a plurality of layers of flow guide uniform distribution plates are arranged at the position, close to the air inlet pipe, of the top in the tower body, a heat exchange device is arranged at the position, close to the ash hopper, in the tower body, and a plurality of SCR catalyst layers are vertically arranged between the heat exchange device and the flow guide uniform distribution plates at intervals in the tower body. The cement kiln medium-temperature medium-dust SCR denitration reaction tower can be used for carrying out denitration treatment on nitrogen oxides generated in the cement production process and passing through a kiln tail waste heat power generation boiler, so that the finally obtained exhaust gas meets the emission requirement.

Description

technical field [0001] The invention relates to the technical field of pollutant treatment, in particular to a cement kiln medium-temperature and medium-dust SCR denitrification reaction tower. Background technique [0002] my country is a big cement producing country, and its output has ranked first in the world for many years in a row. In 2020, the country's cumulative total cement output will be about 2.377 billion tons. Due to the characteristics of the cement production process, a certain amount of nitrogen oxides will be produced during the production of cement clinker, and due to the characteristics of high dust content, large gas volume, and complex components in the flue gas of the cement industry, the denitrification work of the cement clinker production line faces challenges. daunting challenges. [0003] At present, the denitrification measures mainly include staged combustion, SNCR denitrification and SCR denitrification technologies. With the further tightenin...

AI Technical Summary

Problems solved by technology

Due to the characteristics of the cement production process, a certain amount of nitrogen oxides will be produced during the production of cement clinker, and due to the characteristics of high dust content, large gas volume, and complex components in the flue gas of the cement industry, the denitrification work of the cement clinker production line faces challenges. facing daunting challenges

[0003] At present, the denitrification measures mainly include staged combustion, SNCR denitrification and SCR denitrification technologies. With the further tightening of nitrogen oxide emission indicators, the existing staged combustion and SNCR denitrification technologies have been difficult to meet the increasingly stringent emission requirements. High denitrification efficiency will become one of the main directions of flue gas denitrification technology in the cement industry

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