Desulfurization and denitrification integrated process combining wet process with photocatalysis technology at normal temperature

The invention discloses a desulfurization and denitrification integrated process by combining a wet method with a photocatalysis technology at normal temperature, and relates to a desulfurization and denitrification process. SO2 is removed by using a wet desulphurization device, so that a photocatalyst is prevented from being inactivated by SO2 in a subsequent photocatalytic denitration part. Then removing moisture in the flue gas, then entering a photocatalytic denitration part, efficiently catalyzing and oxidizing NO into NO2, and sealing in micropores of a photocatalyst. And the generated NO2 can be further converted into a chemical product with a high added value after being desorbed from the photocatalyst, so that the resource utilization of turning waste into wealth is realized. The whole removal process can be efficiently operated at normal temperature, high cost caused by rising and falling of the flue gas temperature is omitted, and green, efficient and economical flue gas desulfurization and denitri