An intelligent integrated device for catalytic denitrification, de-CO and waste heat utilization

Abstract

The invention discloses an intelligent integrated device for catalytic denitration and CO2 removal and waste heat utilization. It includes a reaction system, an intelligent control system, an ammonia injection and flue gas turbulence system, and a flue gas flow line correction system; the reaction system includes a built-in direct combustion furnace 5, a de-CO catalyst layer 6, and a first-stage SCR denitration catalyst layer 7 , the second-stage SCR denitration catalyst layer 8; the intelligent control system includes an intelligent control device 15, an online CO concentration monitoring device 11, a No. 1 online temperature monitoring device 12, a No. 2 online temperature monitoring device 13, and a No. 3 online temperature monitoring device 14. Supplementary combustion adjustment module 10; the ammonia injection and flue gas turbulence system includes an ammonia injection grill 1 and a forced flue gas spoiler 2; the flue gas flow line correction system includes a guide vane 3, a rectifying grille 4. The invention upgrades and transforms traditional treatment equipment, uses the heat released by catalytic combustion of carbon monoxide to heat the flue gas, and the recovered energy reduces the gas consumption, realizes the removal of CO, and satisfies the temperature reaction range of denitration and the efficient removal of NOx.

Description

technical field [0001] The invention belongs to the technical field of sintering flue gas pollution prevention and control in the iron and steel metallurgy industry, and in particular relates to an intelligent integrated device for catalytic denitration, CO2 removal and waste heat utilization. Background technique [0002] Sintering flue gas is a major source of emissions in the iron and steel industry. The Ministry of Ecology and Environment of my country officially released the “Opinions on Promoting the Implementation of Ultra-Low Emissions in the Iron and Steel Industry” in April 2019. It is required that the hourly average emission concentrations of particulate matter, sulfur dioxide and nitrogen oxides from the head of the sintering machine should not be higher than 10, 35, and 50 mg / m3, respectively, and the emission standards for sintering flue gas should be raised. [0003] The transformation of ultra-low emission of sintering flue gas pollutants is imperative, and i...

AI Technical Summary

Problems solved by technology

[0013] In the published patents, adding CO catalytic reaction equipment in series in the sintering flue gas treatment process will result in a large footprint and cannot be implemented

The load fluctuation of sintering flue gas is also not considered. When the concentration of CO in the flue gas is low, the CO catalytic reaction equipment cannot meet the temperature required for denitrification, and these processes cannot be applied in actual engineering implementation.

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