Accurate control system for waste gas treatment in chemical plant area

A precise control system for waste gas treatment in a chemical plant area provided by the present invention comprises a waste gas online monitoring module, a PLC intelligent control module and a waste gas purification treatment module, the waste gas online monitoring module comprises an online monitoring unit, a signal processing unit and a signal transmission unit, and the PLC intelligent control module comprises a data storage unit and a processing output unit. The waste gas purification treatment module comprises a first purification unit and a second purification unit which are sequentially arranged along a waste gas purification flow path, the waste gas online monitoring module is used for monitoring the concentration value of each target component which pollutes the atmosphere and is contained in the waste gas, and the concentration value is transmitted to the PLC intelligent control module; and the PLC intelligent control module controls the waste gas purification treatment module to perform staged pur