Conducting flue gas denitration catalyst and preparation method thereof

Abstract

The invention relates to a conducting flue gas denitration catalyst and a preparation method thereof. The conducting flue gas denitration catalyst is prepared from the following raw materials in percentage by weight: 60 to 90 percent of titanium dioxide, 3 to 9 percent of tungsten trioxide, 0.1 to 2 percent of vanadium pentoxide, 1 to 5 percent of silicon dioxide, 1 to 5 percent of rare earth, 3 to 10 percent of C fibers and the balance of a forming agent. The conducting flue gas denitration catalyst has a wire function, implements low-temperature catalysis, has high denitration efficiency, a low SO2 / SO3 conversion rate, a low ammonia escape rate, wear resistance, high intensity, a long chemical service life and a long mechanical service life and has low output of domestic sewage.

Description

technical field [0001] The invention relates to an SCR flue gas denitration catalyst, in particular to a conductive flue gas denitration catalyst and a preparation method thereof. Background technique [0002] NOx in flue gas is a major source of air pollution. It not only damages various human organs, but even causes cancer. For flue gas denitrification, the most mature technology in the world is SCR denitrification technology. SCR denitrification technology refers to that under the action of the denitrification catalyst, the NOx in the flue gas and the reducing agent (NH 3 ) undergoes a reduction reaction to generate N 2 and H 2 O. However, the reaction temperature of the currently used SCR denitration catalyst is usually in the range of 350°C to 400°C, which is commonly referred to as a medium temperature denitration catalyst. In order to ensure the reaction temperature of the denitration catalyst and avoid catalyst clogging and deactivation caused by the production ...

AI Technical Summary

Problems solved by technology

However, the flue gas of this arrangement contains a large amount of SO 2 、K 2 O, CaO and As 2 o 3 etc., will cause catalyst poisoning, and high concentration of fly ash will cause blockage and corrosion of the catalyst, reducing its service life

Moreover, due to the limitations of space and piping, the cost of retrofitting the SCR system installed above the desulfurization and dust collector in the existing boiler system of some power plants is very high

[0003] In addition, in other denitrification applications such as marine denitrification, sulfuric acid plants, coking plants, etc., the flue gas outlet temperature is relatively low, and the currently used medium temperature denitrification catalysts (generally V-Ti-W-based) cannot meet the requirements of denitrification

At present, various scientific research institutes and universities at home and abroad are also actively developing various low-temperature denitration catalysts, but the low-temperature denitration catalysts currently developed either have very low denitrification efficiency, or have a short service life, which cannot meet industrial applications at all.