Catalyst for catalyzing simultaneous coal char combustion and in-situ denitration and application method thereof

Abstract

The invention discloses a catalyst for catalyzing simultaneous coal char combustion and in-situ denitration and an application method thereof, belonging to the technical field of efficient catalytic combustion of coal and coke and pollutant emission reduction. According to the invention, Fe or a Fe and CaO composite or a Fe and CeO2 composite is selected as the catalyst, and under the condition that the addition amount of the catalyst is 1-15% of the mass of coal char and the mass ratio of Fe to CaO or Fe to CeO2 is 0.1-3, the ignition point of the coal char can be reduced, the burning rate ofthe coal char can be improved, and meanwhile, the NOx emission amount in the coal char combustion process can be effectively reduced. The catalyst can reduce the ignition temperature and burnout temperature of coke powder by 15.1 DEG C and 68.8 DEG C respectively, and the NO emission reduction rate can reach 39.6%. The catalyst is cheap and easy to obtain, realizes high-efficiency utilization ofwaste, also has simple operation and easy realization in use process, and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency catalytic combustion of coal and coke and emission reduction of pollutants, and in particular relates to a cheap composite catalyst that can not only catalyze the efficient combustion of coal and coke, but also efficiently catalyze the NOx produced in the combustion process in situ emission reduction. Background technique [0002] Coal, as the most important primary energy source in my country, accounts for 76% of China's total energy consumption. About 84% of the total coal production is used for direct combustion every year. At the same time, my country is a big coke-producing country. In 2018, the national coke output was 438 million tons. Coking plants produce coke for blast furnace ironmaking while producing a large amount of coke, which is useful for blast furnace ironmaking. Limited, it is mainly used as sinter fuel. When burning coal and coke produced by coking plants, NOx will b...

AI Technical Summary

Problems solved by technology

The composition of the above-mentioned coal char combustion catalyst is very complex and expensive, and the one-time use makes the process economical. Pollutants are produced during the combustion of organic matter in the waste liquid and cannot efficiently reduce NOx in the combustion process. At the same time, part of the coal char combustion catalyst Addition causes corrosion problems in the furnace and shortens the life of the combustion furnace