The invention belongs to the technical field of
environmental protection, and particularly relates to a method for preparing self-regeneration long-acting high-activity denitration catalysts. The method includes steps of carrying out micro-
corrosion on the surfaces and the inside of porous
basalt with
honeycomb structures by means of fermenting
biogas slurry and pig
manure; freezing water infused into the
basalt by means of
liquid nitrogen freezing, enlarging the volume to carry out expansion and
crazing the
basalt to obtain basalt
powder; attaching
organic acid into the basalt
powder by means of pretreatment and chelating
metal ions in the surfaces and pores of the basalt
powder when the basalt powder is in contact with
mixed metal impregnation liquid; carrying out calcining to form
metal oxide and allowing the
metal oxide to be tightly adsorbed on the surface of a carrier; mixing the carrier and
adhesive with each other to obtain mixtures and smearing the mixtures on the surfaces of
zeolite to obtain the catalysts. The porous basalt with the
honeycomb structures is used as a catalyst carrier. The method has the advantages that outer
layers of the catalysts can be gradually aged and fall off layer upon layer under high-temperature and abrasion effects in
catalysis procedures, accordingly, internal new
catalysis layers can be exposed, the catalysts do not need to be replaced, the service lives of the catalysts can be prolonged, and the catalysts are good in denitration activity.