Local air exhaust and VOCs purification system of hot core box core making machine in casting workshop

The utility model discloses a local exhaust and VOCs (volatile organic compounds) purification system of a hot core box core making machine in a casting workshop, which comprises a gas purification unit, a waste gas exhaust unit connected with the gas purification unit and a purified gas exhaust unit, and is characterized in that the waste gas enters the purified gas exhaust direction; the gas purification unit comprises a dry dust filter, UV photo-oxidation catalytic equipment and an activated carbon adsorption box which are arranged in sequence; the waste gas exhaust unit comprises a plurality of exhaust hoods; the exhaust hoods are connected to a gas inlet of the gas purification unit through a waste gas exhaust pipeline; sampling holes are formed in gas pipelines on the front side of the gas inlet of the gas purification unit and the rear side of the purified gas outlet of the purified gas discharge unit; and the sampling holes are connected with a VOCs online monitoring system through sampling pipelines.