Abstract: In the process of monitoring the pollutant discharge in the petrochemical production process, the accuracy of the monitoring results is low due to the large number of pollutants to be monitored. Therefore, the self-monitoring technology of pollutant discharge in the petrochemical production process is proposed. An intelligent data acquisition device including HT6501 central controller and ATT7022E metering chip is designed to calculate the difference of the status parameters of petrochemical production equipment in the adjacent time window to obtain the corresponding production status. Then the product output is calculated by combining the relationship between the output of petrochemical products and energy consumption. And the final emissions of different products are calculated by using the output of products and pollutants and the enterprise's capacity to treat pollutants. In the test results, the error between the monitoring results of the design method for the emission of air pollutants and water pollutants and the actual value is stable within 0.3mg/h.

Key words: petrochemical production, pollutant emission, self-monitoring, intelligent data acquisition, status parameter difference, product output