The invention discloses a method for treating VOCs
waste gas in
petrochemical industry through normal-temperature high-efficiency
catalytic degradation and belongs to the technical field of
waste gas treatment. The method disclosed by the invention comprises the following steps of: enabling
waste gas to enter a first spraying
tower from the bottom, collide relative to each other with alkaline spraying liquid sprayed from top to bottom and neutralize acid ingredients to form salt,
trapping dust, discharging from the bottom, and enabling the waste gas to be discharged from the top; enabling the waste gas to enter a second spraying
tower from the bottom, collide relative to each other with spraying liquid sprayed from top to bottom and dissolve soluble ingredients to form a dissolved solution, discharging from the bottom, introducing
ozone into the waste gas discharged from the top, and carrying out
oxidation reduction reaction under the action of a CeMnO3 / TiO2@SiO2 catalyst to generate CO2 and H2O, so that waste gas treatment is completed. The treatment method disclosed by the invention has the advantages that a large number of 'gas state' hydroxyl free radicals are produced and released and are fully contacted with gas state VOCs molecules as no
interphase resistance exists, so that efficiency of treating 'gas' with 'gas' is greatly improved, and VOCs are rapidly and efficiently degraded into micromolecules such as CO2 and H2O and extremely small amount of inorganic salt.