Spraying device and biological deodorization system

The utility model relates to the technical field of waste gas treatment, and provides a spraying device and a biological deodorization system. The spraying device comprises a first liquid conveying unit and a second liquid conveying unit, the first liquid conveying unit is provided with a first liquid conveying cavity, a liquid inlet and a liquid outlet, and the liquid inlet can be communicated with the liquid outlet through the first liquid conveying cavity; the second liquid conveying unit is provided with a second liquid conveying cavity, a liquid inlet and a plurality of liquid spraying openings, the liquid outlet is communicated with the liquid spraying openings through the liquid inlet and the second liquid conveying cavity in sequence, and the liquid spraying openings are used for spraying liquid to the biological filler in the biological deodorization box; the distances between every two adjacent liquid spraying openings are equal. The utility model provides a spraying device and a biological deodoriz