The invention relates to the technical field of purification of industrial boiler
flue gas, in particular to a preparation method of a low-temperature denitration
filter material based on a water
quenching process. The preparation method comprises the following steps: uniformly mixing and stirring
vanadium pentoxide powder, an organic modifier and cerous
nitrate hexahydrate
powder to prepare a low-temperature denitration catalyst precursor
emulsion; adding the low-temperature denitration catalyst precursor
emulsion into a reaction kettle, and soaking filter cloth in a reaction kettle in vacuum; and finally,
drying the soaked filter cloth, and carrying out medium-temperature
calcination to obtain the low-temperature denitration
filter material. A preparation method of the low-temperature denitration catalyst precursor
emulsion comprises the following steps: adding deionized water into the reaction kettle, heating and melting
vanadium pentoxide powder, quickly pouring the molten vanadiumpentoxide powder into the deionized water, and conducting ultrasonic stirring and dissolving; adding an organic modifier into the solution, and performing full stirring and uniform mixing to obtain astable
vanadium pentoxide emulsion; and finally, adding cerous
nitrate hexahydrate powder into the solution, and conducting stirring until the cerous
nitrate hexahydrate powder is completely dissolved to obtain the low-temperature denitration catalyst precursor emulsion.